JP2763873B2 - Basic construction method selection device and selection method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a basic construction method selecting apparatus for supporting various works in selecting a foundation method for a building such as a house based on the result of a ground survey conducted by a penetration test using a Swedish sounding test method or the like. Regarding the selection method.

[0002]

2. Description of the Related Art When constructing a building, it is necessary to select the type of foundation according to the condition of the ground. In the case of a high quality ground, a predetermined ground strength (5 tf / m ² or 3 tf / m ²⁾
Etc.), but in the case of bad ground,
It is necessary to reinforce the foundation or improve the ground according to the degree and situation. For example, for partially defective ground, partial deep foundation, partial lapple foundation, deep foundation, surface layer improvement, columnar improvement pile, etc. are adopted. Etc. are adopted. on the other hand,
As a soil survey method suitable for relatively small buildings such as detached houses, the Swedish sounding test method is widely used from the comprehensive evaluation of various constraints and survey capabilities (penetration depth, applicable soil quality). This test has the advantage that it can be performed relatively easily and the soil shear strength can be measured continuously every 25 cm. The foundation designer comprehensively evaluates data such as soil properties and surrounding obstacles, mainly based on the test results, and selects a foundation method.

[0003]

However, the evaluation at the time of selecting the foundation method is very complicated, and the test results also need to be converted into various data formats required for the evaluation. And it takes time. In the case of a small building such as a detached house, the selection of the foundation method is a heavy burden due to restrictions on the period and costs. For this reason, it is desirable to automate the selection of the foundation method using a computer. However, the condition of the ground varies greatly depending on the site, and the optimum foundation method changes depending on the building structure, the location of the building on the site, and the building area. Automatic selection is impossible. Further, even if the automatic selection is performed to provide a reference for the selection, merely displaying the result does not allow the designer to accurately confirm the condition according to various conditions. Also, in general, the method of processing the results of a penetration test cannot be evaluated for immediate settlement or consolidation settlement, and in the selection of a foundation method for a house, selection with high reliability including evaluation of uneven settlement is required. Not yet realized. In addition, when selecting a foundation method, it is necessary to record the site location, the location of the building in it, and various other surrounding conditions along with the results of the above-mentioned ground survey. It is created on a separate system, and it takes time to create and store it.

The present invention has been made to solve the above problems, and the test results of the penetration test are converted into a data format which can be easily used for selecting a method of construction, and based on this data, the selection of an optimum foundation method is displayed on a screen. It is an object of the present invention to provide a basic construction method selecting device and a selecting method which can be simply and quickly performed according to the display of the above. Another object of the present invention is to make it possible to easily and quickly select a reliable foundation method including evaluation of consolidation settlement for various types of building load differences and foundation widths. It is. Still another object of the present invention is to create a survey position map at the time of an operation for selecting a foundation method, and to perform the entire process from inputting various data of a ground survey to selecting a method with one device. . Still another object of the present invention is to enable automatic selection of an optimum foundation method according to a predetermined criterion.

[0005]

The construction of the basic construction method selecting apparatus of the present invention will be described with reference to FIGS. 1 to 3 corresponding to the embodiment. The foundation construction method selecting device (4) includes a means (32) for setting a plurality of detailed criteria for selecting a foundation method according to the ground condition and a foundation construction method selection criterion including a procedure for determining these detailed criteria. Means (33) for displaying the foundation construction method selection criteria and the type of foundation construction method selected on the screen of the display device (39) as a flow chart, and the test results of the penetration tester (1) for ground investigation. A conversion means (30) for converting the data into a data format used in the basic construction method selection criteria, a conversion result output means (31) for outputting the conversion result to the display device (39) or another output device (38); With respect to the flowchart displayed on the screen, the user is prompted to input a predetermined response in each step indicating the detailed criteria, and the user is prompted to reply to the next successive step corresponding to the input result to advance the state. Flowchart traversal is obtained and means (34). According to this configuration,
The test results of the penetration tester (1) are converted into the required data format based on the foundation method selection criteria and output. The basic construction method selection standard is displayed as a flowchart on the screen of the display device (39), and the flow chart tracing means (34) prompts the user to input a response to the detailed standard in the basic construction method selection standard at each step. Therefore, in response to the prompt of the input, the designer performs a response input at each step of the flowchart according to the test result of the penetration tester (1) output as described above and other various conditions, The most suitable foundation method can be selected. In this case, since the judgment of each step is left to the designer, the judgment can be made accurately even when there are complicated conditions that are difficult to automate.

In this configuration, the ground test penetration tester (1) is an apparatus for testing by a Swedish sounding test method, and is an automatic load for automatically applying load and rotation to the screw point (5). The apparatus may include a device (6) and a control unit (13), and detection means (14 to 16) for detecting a penetration depth, a load, and a rotation speed. In this case, the control unit (13)
Is provided on the operation panel (3) of the penetration tester (1), and the data obtained from each of the detection means (14 to 16) is converted into a predetermined data format and stored in the operation panel (3). A measurement result processing storage unit (18) is provided. The predetermined data format is, for example, the magnitude of the load (W _SW ) at each penetration depth from the reference plane and the half-rotation speed (N _SW ) per 1 m of the penetration amount. Penetration tester that can automatically measure in this way (1)
By using the method, from the measurement to the selection of the foundation method can be easily performed in a short time. In addition, by providing the operation panel (3) of the penetration tester (1) with the measurement result processing storage unit (18) that converts the data into a predetermined data format and stores the data as described above,
It is also possible to carry only a penetration tester into the site and use a communication line to immediately select a foundation method at a remote location. If the test results are converted into a predetermined data format on the operation panel (3) of the penetration tester (1) in advance and digitized, communication errors are reduced and the communication time is reduced.

[0007] The foundation method selection criteria are mainly based on detailed criteria each of which sets an evaluation for the long-term allowable bearing capacity (q _a ) of the fabric foundation, and the ground necessary for safety with respect to destruction and consolidation settlement. The critical adhesive force value defined as the adhesive force (C _u ) may include an evaluation for a critical adhesive force curve represented by a distribution in the depth direction. The limit adhesive force curve is set for each combination of a difference in building load of a building and a foundation width. The converting means (30) converts the measured adhesive strength value indicating the adhesive strength of the ground at each depth.
b) shall be included. The “building load” referred to here is a load per unit area of a building, and is a building type, for example, a building using heavy steel frames and ALC, another panel-based building, a two-story building or a three-story building. It may be roughly classified according to the degree of the building. The critical adhesive force curve was recently published as a method that can evaluate the ground strength of a cloth foundation based on the results of a penetration test and can easily evaluate the presence or absence of uneven settlement. The shape changes. On the other hand, in a detached industrialized house, the foundation is standardized according to the product type, and a plurality of types of standard cloth foundations having different foundation widths according to an assumed ground pressure are prepared. Building loads vary depending on the type of product. Therefore, as described above, by setting the limit adhesive force curve for each combination of the difference in the building load of the building and the foundation width, and comparing the measured adhesive force value with the limit adhesive force curve, the foundation method that does not cause uneven settlement Accurate selection can be easily performed. Therefore, even in a building whose construction period and construction cost are limited, such as a detached house, selection of a reliable foundation construction method including evaluation for uneven settlement can be realized.

Display means (33) for the flowchart
Preferably, the displayed flowchart includes an evaluation step for the critical adhesive force curve.
In addition, in response to the input for selecting this evaluation step, the screen of the display device (39) shows a difference adhesive force curve corresponding to the difference in building load and the selection data of the base width, and the measured adhesive force value. A limit adhesion curve display means (35) is provided. As described above, the critical adhesive force curve is displayed on the screen of the display device at a predetermined step in the flowchart, and the actual adhesive force value is displayed together with the curve, thereby determining a number of detailed standards in the basic construction method selection standard. In this case, the critical adhesion curve can be evaluated in an appropriate process, and an efficient foundation method can be selected.

[0009] In the basic construction method selecting apparatus having the above-described configuration, the measurement range of the site range, the building range, and the ground survey is drawn on the screen of the display device (39) in accordance with the input from the input device (37). And a survey position map creating means (25) for displaying actual dimensions of the drawn figure on the site;
A related data input assisting means (29) for assisting the input of predetermined data necessary for the ground survey and the use of the survey result may be provided. The survey position map creating means (25) is a simple CAD means, so to speak, and each such means (25),
By providing (29), it is possible to perform the entire process from the input of various data for the ground survey to the selection of the construction method, including the survey position map, with one device. Therefore, the management and use of the data become easy.

The method for selecting a foundation method according to the present invention is based on a method for selecting a foundation method including a plurality of detailed criteria for selecting a foundation method according to ground conditions and a procedure for determining these detailed criteria, and a penetration test for ground investigation. Conversion means (30) for converting the test result of the machine (1) into a data format used in the basic construction method selection standard, and displaying the basic construction method selection standard as a flowchart on a screen of a display device (39); In each of the steps, a predetermined response is prompted, and a flow chart tracing means (34) for following the flow chart in response to the input is set, and the flow chart displayed on the screen is converted into This is a method of selecting a basic construction method by tracing the data obtained by the means (30) while mainly inputting a response.

[0011]

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to FIGS. FIG. 1A shows a schematic configuration of the basic construction method selecting device and the penetration tester. FIG. 1B is a block diagram functionally showing the configuration of the penetration tester. The penetration test machine 1 includes a penetration test machine main body 2 and an operation panel 3,
The operation method selecting device 4 is connected to the operation panel 3 by a cable or a communication line. The penetrating tester main body 2 is an apparatus that automates the Swedish sounding test method, and includes an automatic load device 6 that automatically applies a load and rotation to the screw point 5, and is configured as follows. ing. The screw point 5 is attached to the tip of a vertical rod 7, and the rod 7 is gripped by a chuck 9 provided on a loading table 8 and is rotated by a rotation driving unit 10. The rod 7 can be extended.
The loading table 8 is installed on a guide column 11a of a frame 11 installed on the ground GL so as to be able to move up and down, and is moved up and down by a load adjusting means 12 for loading a test load. Rotation driving means 1
The zero and load adjusting means 12 is constituted by an electric motor that can be driven by a household AC commercial power supply, and is controlled by a control unit 13 provided on the operation panel 3 to a predetermined test load and a rotational load according to the penetration state. Is controlled as follows.

The detecting means provided in the penetrating tester main body 2 includes a depth detecting means 14 for measuring the penetration depth D of the screw point 5 from the reference plane, and a load for detecting the vertical load applied to the rod 7. A detection unit 15 and a rotation speed detection unit 16 for detecting the rotation speed of the rod 7 are provided. Each of the detecting means 14 to 15 may directly detect or measure the detection target,
Alternatively, it may be indirectly detected from the load of the load adjusting means 12 or the command value. Further, a reference situation detecting means 20 for detecting abnormal noise or the like is provided on the penetration tester main body 2 or at a distance therefrom. The reference situation detecting means 20 is configured to input only when necessary by manually turning on and off the switch.

The operation panel 3 is of a microcomputer control type for controlling the penetration tester main body 2 and processing detected data.
Operation unit 17, control unit 13, measurement result processing storage unit 1
8 and an output port 41. The operation unit 3 includes various switches and simple display means such as a liquid crystal panel and lamps. The control unit 13 is composed of a microcomputer and programs and data to be executed by the microcomputer, and according to various detection signals obtained from the input of the operation unit 17 and the penetrating tester main body 2, the rotation driving unit 10 according to various penetration conditions. And the load by the load applying means 12 is automatically controlled. The control of the automatic load of this load is, for example, from zero to 49 N (5 kgf), 147 N (15 kgf), 245
N (25 kgf), 490 N (50 kgf), 736 N (7
5kgf), 981N (100kgf), maximum 100kgf
It is done so that the load gradually increases. Rotation is 100
When the penetration of the rod 7 has stopped at kgf, a method of temporarily stopping every half rotation is adopted, and this is counted as one time (half rotation number 1). For details, follow the Swedish sounding test method.

The measurement result processing storage section 18 is a means for converting the outputs of the depth detecting means 14, the load detecting means 15, and the rotational speed detecting means 16 into a predetermined data format and storing them as digital values. It has processing means (not shown) and measurement result storage means 19. Measurement result storage means 1
9 stores the magnitude of the load W _SW and the half rotation number N _SW per 1 m of the penetration amount for each penetration depth D from the reference plane. In addition to the above, the measurement result storage means 19 stores reference data such as abnormal noise obtained from the reference situation detection means 20 and data of the penetration situation such as the speed of the penetration and the presence or absence of rotation.
It is stored every time. The penetration state data may be a result determined from each detection value in the measurement result processing storage unit 18, and the penetration state data and the reference data may be data manually input from the operation panel 3. The data stored in the measurement result storage means 19 can be output from an output port 41 for serial transmission, and can be transmitted to the basic construction method selecting device 4 via a communication line such as a public line.

FIG. 2 is a block diagram showing an outline of a conceptual configuration of the basic construction method selecting device 4, and FIG. In FIG. 2, a basic construction method selecting device 4 includes a computer device such as a personal computer and a program and data to be executed by the computer device. The arithmetic processing unit 21 includes a central processing unit and a memory, and a keyboard, a mouse, and the like. An input device 37 and an output device 38 are provided. The output device 38 shown here is a general term for a display device 39 such as a CRT display, a printer 40, and other output devices (not shown). The arithmetic processing unit 21 includes a process item selecting unit 22, a related data input assisting unit 29, a survey position map creating unit 25, a sounding test result processing unit 26, a basic construction examination flow display / unit, and a unit for realizing each function described later. A processing unit 27 and a data storage unit 28 are provided. The related data input assisting means 29 includes a survey outline input assisting means 23 and a status check list display / confirmation means 24. The data storage unit 29 is a test result storage unit 2 that stores data input from the penetration tester 1.
8a, a general data storage unit 28b that stores data input from the input device 22, and the like, and a study result storage unit 28c that mainly stores results calculated by the arithmetic processing unit 21.

FIG. 3 shows the sounding test result processing means 26 and the basic work examination flow display / processing means 27 of FIG.
FIG. 4 is a block diagram showing the contents of the above. The sounding test result processing means 26 is a means for taking in the test results of the penetration tester 2 and performing various processes, and includes a conversion means 30 and a conversion result output means 31. The conversion means 30 is a means for converting the test result of the penetration test machine 2 into a data format used in the later-described foundation construction method selection standard. In this example, the load W _SW output from the penetration test machine 2 and the half rotation Number N _SW
Are converted into _a long-term allowable supporting force qa and an adhesive force _Cu , respectively. The conversion formula will be described later. The conversion result of the conversion means 30 is
The data is stored in the data storage means 28 (FIG. 2). The conversion result display means 31 displays the long-term allowable bearing capacity q _a
And a means for outputting the adhesive force _Cu to an output device 38 such as a display device 39 or a printer 40.

FIG. 3 shows a basic construction study flow display / processing means 2
7 includes a basic method selection standard setting means 32, a flow chart display means 33, a flow chart tracing means 34, a limit adhesive force curve display means 35, and a selection result display means 36. The foundation method selection criterion setting means 29 is a means for setting a plurality of detailed criteria for mainly selecting the foundation method based on the ground condition and a basis method selection criterion including a procedure for judging these detailed criteria. Each detailed criterion includes a criterion for long-term allowable bearing capacity (q _a ), a criterion based on a critical adhesion curve, and other criterion. The contents of the basic method selection standard setting means 29
This is the content shown in the flow charts of FIGS. 11 and 12 and the limit adhesive force curve of FIG. 13 which are respectively shown as screen display examples. Each step and the limit adhesive force curve in the figure correspond to each detailed reference. The limit adhesive force curve is determined by the limit adhesive force curve setting means 32a in the basic method selection criteria setting means 32.
First, prepare for each combination of building load difference and foundation width. The building load is based on whether the building is heavy steel ALC type,
Since it is an ordinary panel system or different depending on the two-story or three-story building, and is determined by the type of these building products, the "difference in building load" is distinguished here by the difference in product type. Flow chart display means 33
Is means for displaying the flowcharts of FIGS. 11 and 12 on the screen of the display device 39.

For each of the flowcharts displayed on the screen of the display device 39, the flowchart tracing means 34 prompts the user to input a predetermined reply in each step, and prompts the successive steps corresponding to the input result to reply. It is a means to advance. The prompting of the response may be any method that allows the operator to know the step to be input. For example,
The method of changing the color of the corresponding step from other steps, the method of blinking display, the method of changing the traced part of the line connecting the steps in the flowchart with other lines with the color or thickness, the flowchart on the screen Any method such as a method of displaying a character string on another part may be used.

The limit adhesive force curve display means 35 displays the limit adhesive force curve (limit _CU curve) set in the limit adhesive force curve setting means 32a in response to a predetermined input as illustrated in FIG. This is a means for displaying on the screen of the device 39 and displaying the measured adhesive force calculated by the conversion means 30 in a graph showing a limit adhesive force curve. Selection result display means 3
Reference numeral 6 denotes a means for displaying the type of the foundation method selected by following the flowchart on the display device 39 as shown in a screen example in FIG.

A part composed of a computer program and data used in this program among the means 22 to 28 constituting the arithmetic processing unit 21 in FIG.
It is stored in a storage medium such as a floppy disk or an optical disk which can be read by a computer device as it is or in a data compressed state, and is installed on a hard disk of the computer itself.
Or use as is. The storage medium storing the program and the data constitutes the basic construction method selecting device component 42 (FIG. 1).

Next, the details of each component of the basic construction method selecting device 4 and the basic construction method selecting method by the basic construction method selecting device 4 will be described. When the basic construction method selecting device 4 is activated, a menu window shown in FIG. When an input for selecting the “input” function is made from this window, the window shown in FIG. 4B is displayed in an overlapping manner, and a new data file is prepared. In this data file, all data for one site is recorded. In the window shown in FIG. 4B, selection items displayed in characters of “survey summary”, “checklist”, “sounding”, “survey location map”, and “basic work study flow” are shown. These choices are shown in FIG.
Survey summary input assisting means 23, status checklist display / confirmation means 24, sounding test result processing means 2
6, the survey position map creating means 25 and the basic construction study flow display / processing means 27, respectively, and when a desired item is selected, the corresponding means 23 to 27 function. The means for displaying the window of FIG. 4B and activating the corresponding means 23 to 37 when the display item is selected is the processing item selecting means 22 of FIG.
By sequentially selecting each menu in FIG. 4B and inputting data, selection of a foundation method is performed.

From the window shown in FIG.
Is selected, the input screen of the survey summary shown in FIG. This input screen displays the survey summary items related to the site, such as the survey point, the name of the surveyor, the number of measurement points, each measurement point item, point coordinates, location map coordinates, figure numbers, etc., and the description of input data for these display items Column is displayed. By inputting from the input device 37 to this data description field, the input data is stored in the general data storage unit 28b in FIG. Display this survey summary input screen,
The means for storing each data input is the survey outline input assisting means 23. In the field of each measurement point on the survey summary input screen, the test date, weather, work time, altitude, water level, and the like for each measurement point are input.

When a checklist item is selected from the window shown in FIG. 4B, the checklist shown in FIG. This screen allows the user to check the topographical geology around the premises, adjacent land information, road conditions, site conditions, etc. for predetermined items. Select the content display characters displayed for each item on the screen, Alternatively, by inputting a numerical value or the like in a blank space on the screen, the confirmation by the check list is completed. In the column of topographical geology around the site, fill in the groundwater level of each part such as test hole water level, well water level, channel water level, river water level, etc. In the figure,
Only a part of the check contents is illustrated, and most of the check contents are omitted. The means for displaying the checklist of FIG. 7 on the screen and storing the input data in the general data storage unit 28b of FIG. 2 is the status checklist display / confirmation means 24.

When the item "Sounding" is selected from the window shown in FIG. 4B, the window shown in FIG. 7A is displayed on the screen of the display device 39 by the function of the sounding test result processing means 26 shown in FIGS. Will be displayed. In this window, numbers corresponding to the number of measurements are displayed. When the number of the measurement point is selected from this window, a window shown in FIG. 7B is displayed for each measurement point. This window shows the display of operation keys such as "Import", "Confirm", and "Cancel". Below that, a table for data display is displayed in the column direction, "Load", "Half-turn". , "Penetration depth", "sound / feel", "penetration status", and "soil" are displayed, and a table is displayed in the row direction indicating the number of a data set corresponding to the measurement depth. Here, when “take in” is selected, each data stored in the operation panel 3 of the penetration tester 1 is
The test result data is stored in the test result data storage unit 28a of the basic construction method selecting device 4, and the data is displayed in a data display table on the same screen. Note that the captured data may be temporarily stored in another work area or the like, and may be stored in the test result data storage unit 28a after the operation of “determining” later.

In the table of FIG. 7B, data for each predetermined depth (for example, 25 cm) is generally displayed. However, the penetration tester 1 stores test result data for each smaller depth. They may be displayed by a predetermined operation. The data in the table in FIG. 3 can be rewritten by overwriting by manual input, and when rewritten, the rewritten data is stored in the test result data storage unit 28b (FIG. 2).
Is stored. When the "confirm" operation on the screen is selected, the input data is confirmed. The “sound / feel”, “penetration situation”, and “soil” in the table of FIG. 7 are all manually input. In this case, each of FIGS.
By opening the data selection window shown in (C) and selecting the corresponding contents, manual input of the soil and the like can be performed.
For "sound / feel" and "penetration status", see penetration tester 1
If the operation panel 3 already has data, the data may be imported. As described above, each test result data stored in the penetrating tester 1 is fetched and the data is determined, and the conversion operation is performed by the conversion means 30 in FIG. Is stored in the area.

When the item of "survey position map" in FIG. 4B is selected, a screen of the survey position map of FIG. 9A is displayed on the display device 39. When the unit of the vertical axis and the horizontal axis is input and confirmed, the scale is displayed on the vertical axis and the horizontal axis of the survey position map. After that, enter the area of the site with the mouse. In this case, when a key point is clicked with a mouse, a line is displayed as shown in FIG. 9B, and the values of the vertical and horizontal axes of the clicked point are displayed in the site input box. When the range is surrounded by the line, FIG.
The color in that range changes as in (A). Note that, in the same figure, the color change portion is shown by oblique lines. Next, the user inputs the range of the building with the mouse as in the case of the site. When the area is surrounded, the color changes as shown in FIG. Thereafter, the position of the measured measurement point is clicked with the mouse. Thus, as shown in FIG. 10 (C), the measurement points are shown in the figure, and the positions of the vertical and horizontal axes of the measurement points are displayed on the right side in the order of the pile arrangement.
Thereafter, each of these measurement points is assigned a distinction number or code, and the measurement point number is displayed on some screens.
When the start and end of the interval to be displayed are clicked with the mouse, the dimensions are read and displayed. As for the orientation of the site location map, an orientation display window (not shown) appears by clicking a display portion of the text of “azimuth” shown on the screen. Here, by inputting and confirming the azimuth, the position at which the azimuth symbol indicating the north direction at the upper left of the screen points to north changes. A CA that causes a survey position map to be created by such a procedure and stores the created result in a predetermined storage area
The D means is the survey position map creating means of FIG.

When the item of “Basic work study flow” in FIG. 4B is selected, a first flowchart (FIG. 11) is displayed on the screen of the display device 39. This flowchart is
The basic construction method is selected by tracing by hand input (mouse or return key) from the start. For example, in each judgment step, a character of Y or N is inputted from a keyboard as an input of a judgment result of a designer. In other steps, the return key is pressed as an input for proceeding with the processing of the corresponding step. In the flow chart, and then to step S1 of confirmation that the ground survey, question whether the embankment after survey (step S2), and if not the embankment, the step (S3) of the limit C _U evaluation (consolidation settlement) move on. In the case of embankment, the designer determines whether or not the embankment itself may be settled. If there is a possibility of settlement, an instruction in step S9 is issued. That is, the ground survey is performed again after embankment. For no subsidence possibility, the process proceeds to the limit C _U evaluation step (S3).

When the return key is pressed on the limit C _U evaluation,
Critical viscous force curve of FIG. 13 (hereinafter referred to as “critical C _U curve”)
Screen is displayed. The limit C _U curve is a curve that indicates, in the depth direction, a limit adhesion value determined as the adhesion of the ground necessary for safety with respect to destruction and consolidation settlement, and will be described in detail later. When the screen shown in FIG. 13 is opened, the limit C _U curve is not displayed at first, but an input for selecting a product name is performed, and the strength of each board (3 tf / m ₂ or 5 t
tf / m ₂ ) When the base width of the standard cloth foundation is input, the limit C _U curve is displayed on the graph, and the actually measured C _U is displayed.
Is also displayed. In the figure, the limit _CU curves a and b corresponding to the two types of standard cloth foundations are displayed. The actual measurement C _U is the actual measurement of the adhesive force of the soil.
The test result of the penetration tester 1 is obtained by conversion by the conversion means 30 of FIG. Found C _U, if there is data continuously in the depth direction of the ground is displayed as is represented by a curve line c. In the graph, if there is a limit C _U curve a, Found C _U to the right of the b is, per each standard basis,
This is a safe range for consolidation settlement. When the value of the measured C _U shown in the drawing, a part is between the curves a and b, thus it is safe in the standard basis set the ground strength to 3TF / m _2, the 5tf / m ₂ It can be seen that the standard basis set is not sufficient for security. Such limitation C _U curve appears on the screen, since the measured C _U is displayed superimposed on the same graph, when selecting a standard basis, whether safe for consolidation settlement can be confirmed easily .

Next, the process proceeds to step S4 in the flowchart of FIG. 11, and the result of the determination as to whether there is a possibility of uneven settlement of the ground itself is input as "comprehensive evaluation 1". This determination is the value of the limit C _U curve and the measured C _U, designers do. In accordance with this determination result, the process proceeds to a predetermined step in the next method selection step S5. The construction method selection step S5 includes a standard foundation examination step S5a,
There is a step S5b for studying the partial reinforcement foundation and a step S5c for studying the entire reinforcement. If it is determined in the above-mentioned determination step S4 that there is no possibility of uneven settlement of the ground itself, the process proceeds to the standard foundation study step S5a. When it is determined that there is a possibility of uneven settlement, a step S5 for studying the overall reinforcement
Jump to c.

In this method selection step S5, when the return key is pressed in step S5a for studying the standard foundation, a second flowchart (FIG. 12) is displayed on the screen. This flowchart shows the details of the method selection step S5 in FIG. This screen is also advanced by key input as described above. First, the long-term permissible bearing capacity q _a depth of the foundation under 2B ₅ causes the determining whether the first predetermined value of the standard basis (5tf / m ²⁾ or more (M1). If it is above, the ground is of good quality, and the first standard foundation (5 tf / m ² foundation) is selected as the selection result. The long-term allowable bearing force q _a is a value obtained by converting the investigation result of the penetration tester 1 by the conversion means 30, is continuously obtained in the depth direction for each measurement point, and is stored in a predetermined storage area. . This is displayed on the display device 39 by the conversion result display means 31.
By outputting the image to the screen or the printer 40, the designer can know. The "depth of the foundation under 2B _5" is the depth of twice the basic width B ₅ of the first standard basis.
The following “depth of 2B ₃ below the foundation” also means a depth twice the foundation width B ₃ of the second standard foundation. Each subscript indicates the corresponding tonnage. Predetermined value of the first standard foundation (5 tf / m ² )
In the case of less than, to basal under 2B ₃ long allowable bearing capacity q
It is determined whether a is equal to or more than a predetermined value (3 tf / m ² ) of the second standard basis (M2). If it is above, the ground is of good quality, and the second standard foundation (3 tf / m ² foundation) is the result of selection.
In steps M1 and M2, when there are a plurality of measurement points (for example, when there are five measurement points as shown in FIG. 10C), when all the measurement points satisfy the condition,
It is determined as “Yes”.

If the long-term allowable bearing capacity q _a is less than the predetermined value (3 tf / m ² ) of the second standard foundation, 1.5 m below the foundation
Thereby determining whether there is a q _a ≧ 5tf / m ² or more layers up to (M3). It can also be easily determined by such as by displaying the q _a screen. When there is a layer at all the measurement points is determined whether the vertical distribution of long-term tolerance bearing capacity q _a is uniform at each measurement point (M3-1), if uniform basis under q _a To determine whether or not it is possible to improve (M3-2),
If possible, an instruction is given on the flowchart to perform a re-investigation after any of the compaction, improvement, and replacement processes. If the vertical distribution of qa is not uniform, and q
If it is impossible to improve a, it is determined whether or not the groundwater is up to 1.5 m below the foundation (M3-3). The presence or absence of groundwater and its depth can be determined by viewing the checklist input result of FIG. 6 on a screen or the like. If there is no groundwater, it is determined whether or not any part of the measurement points satisfies the conditions of steps M1 and M2 (M3-4). If it satisfies, it is a partially defective ground, and a partial deep foundation or a partial lapple foundation is the result of selection. Many parts of the measurement points are in steps M1,
When the condition of M2 is not satisfied, the ground is partially defective, but a deep foundation or surface layer improvement is selected as a selection result. In the determination step (M3-3) of the presence or absence of groundwater, if there is groundwater, the ground is partially defective, but the columnar improved pile is selected.

Qa up to 1.5 m below the foundation of step M3
If it is determined in the process of determining whether or not there is a layer of ≧ 5 tf / m ² or more, the process proceeds to step M4 to determine whether or not the vertical distribution of qa is uniform at each measurement point. If uniform,
It is determined whether or not the groundwater is below a predetermined depth (1.5 m) under the foundation (M4-1). In some cases, the ground is completely defective, but the deep foundation or surface layer improvement is used as a selection result. If there is no groundwater, the ground is completely defective, but solid foundations or friction piles (column improved piles) will be selected. Step M4
In the process of determining the vertical distribution of qa, when it is determined that the thickness is not uniform, it is determined whether or not the thickness of the support layer can be confirmed to be 2 m or more. (Steel pipe piles and improved columnar piles) are selected. If a thickness of 2 m or more cannot be confirmed, it is determined whether or not a confirmation investigation of the support layer is necessary (M5-1). If not necessary, the support layer
It is asked whether it can be judged to be m or more, and as a result of selection, a support pile is shown if possible, and a friction pile (column-shaped improved pile) is shown if it is not possible.

In the flowchart of FIG. 12, when the return key is pressed after reaching the basic construction method to be selected,
The process proceeds to step S6 of “Comprehensive evaluation 2” in the flowchart of FIG. This step is the final step of selecting a construction method, and a detailed description is omitted, but the designer is required to examine the validity of the foundation method selected from the viewpoint of workability and economy. When the user proceeds with step S6 using the return key and presses the return key in step S7 for determining the next basic construction method, the result of the determination in the flowchart is displayed as shown in FIG. In this display, the names of the respective basic construction methods to be selected are listed, and the selected basic construction methods are indicated by local color differences on the screen. When selecting a basic construction method different from the selection result based on the flowchart, the selection reason is entered in the selection reason entry column shown on the judgment result display screen. This completes the selection of the foundation method.

When it is desired to correct the data input in each of the above steps, select the item of "correction" from the menu of FIG. 4 (A) and display a survey data list (not shown) on the screen to correct the data. Select the place you want. As a result, the same screen as in the case of input is displayed, and correction can be performed. Also,
Each data input in this manner is selected from the menu of FIG. 4 (A) by selecting the item of “search”, a search processing screen (not shown) is displayed, and the search item shown on the screen is displayed. By inputting the relevant data, necessary data can be searched.

Next, the relationship between test results by Swedish sounding test method, the adhesive force C _u of the long-term permissible bearing capacity q _a and the soil used in the foundation method selection criteria,
The limit _Cu curve will be described. The explanation below is
I quoted the description of 1992, VOL.20, No.12 of the magazine "Basic Engineering".
The uniaxial compressive strength q _u (kgf / cm ² ) can be obtained from the following equation from the load W _SW and the half-rotation speed N _{SW obtained as} a result of the test. _{q u = 0.0045W SW + 0.0075N SW} ... (1) For cohesive soil, adhesion C _u is established relationship following equation is between q _u. For the deformation characteristics of the _{C u = q u / 2 ...} (2) soil, are considered various estimation equation, and an example, be a _{P c = -0.008w + 1.230q u +0.967} ... regression equation And the multiple correlation coefficient is 0.889. p _c is the consolidation yield stress, w is the moisture content (%).

A method for simply evaluating the ground strength of a fabric foundation will be described. (B) long-term permissible bearing capacity q _a, ultimate bearing capacity q _d Rated fabric foundation of destruction is given by the following equation. Although there are many proposals for the calculation formula of the ultimate bearing capacity, a calculation formula based on plasticity theory is used here. In addition, the effect of embedding the foundation will be ignored. q _a = q _d / α (3) q _d = (2 + π) _Cu (4) where α: the distance from the bottom of the long-term safety factor for fracture to the maximum depth of the fracture surface is the shortest of the foundation. When the side length is B, B / √2. Adhesion C _u of the required soil against long-term permissible bearing capacity q _a is the formula (3) and (4), is given by the following equation. C _u ≧ (α · q _a ) / (2 + π) (5)

(B) Evaluation of consolidation settlement The effective underground stress σ _z1 before construction is expressed by the following equation. When h ≦ H ₁ σ _z1 = γ · h When h> H ₁ σ _z1 = γ · H ₁ + γ ′ (h−H ₁ ) (6) where H ₁ : from ground surface to groundwater level Depth (m) (see Fig. 15) h: Depth from the ground surface to the position where earth pressure is to be obtained
(m) γ: Unit volume weight (tf / m ³ ) γ ′: Unit volume weight in water (tf / m ³ ) The increment Δσ _z of normal stress below the center of the fabric base is given by the following equation. Δσ _z = (q / π) × {(B / Z) + sin (B / Z)} (7) where, q: ground pressure (tf / m ² ) under the foundation bottom Z: vertical stress from the foundation bottom (M) Effective ground stress after construction σ _Z2 is expressed by the following equation. σ _Z2 = σ _z1 + Δσ _z (8) In order to be safe against settlement, the effective underground stress σ _Z2 after construction must be less than or equal to the consolidation yield stress P _c. Is shown. P _c ≧ β · σ _Z2 (9) where β (≧ 1) is a coefficient for evaluating the degree of safety,
The larger the value, the higher the degree of safety against subsidence.
Using the equation (2), the estimation equation, and the equation (9), the required cohesive strength _{Cu of the} soil is expressed by β and σ _{Z2 in} order to be safe against settlement. C _u ≧ (β · σ _Z2 ) /2×1.778 (10)

[0039] (c) Conditions for the limit C _u curve foundation is safe for subsidence and destruction is that the strength of the ground to satisfy Equation (10) and equation (5). When the contact pressure q (tf / m ² ) is set, q _a = q in the equation (5)
Is calculated as Here, in order to easily evaluate the earth bearing capacity, a _Cu value necessary for safety with respect to destruction and subsidence is called a limit _Cu, and its distribution in the depth direction is defined as a limit _Cu curve. FIG. 13 shows an example. The critical adhesion curve referred to in this specification refers to the critical _Cu curve.
Numerous studies have been made on this limit _Cu curve by comparing unequal settlement and no accident cases, and the measured _Cu is the limit _Cu
It is said that if it is greater, that is, to the right of the limit _Cu curve, no differential settlement of the house will occur.

The limit C _u curves, as can be seen from the equation, showing the curve, instead curved shape by each factor of the basic width concerning fabric foundation, also changes by a safety evaluation factor β safety factor α and subsidence on Fracture . On the other hand, a plurality of types of standard fabric foundations are often prepared assuming different ground pressures as standard foundations in industrialized houses. Therefore, in this embodiment, each constant is determined for each type of house product, standard bases having a plurality of types of base widths are prepared for each product type, and a limit _Cu curve for these bases is calculated in advance to limit the adhesive strength. This was prepared in the force curve setting means 32a (FIG. 3).

The flowchart shown According to the foundation method selection apparatus and the selection method, the test results of the thus penetrometer is outputted in terms of long-term tolerance bearing capacity q _a and adhesion C _u like, also the foundation method selection criteria Since the guidance for following this is provided on the screen, the selection of the optimum foundation method can be performed simply and quickly according to the display on the screen. In particular, the limit _Cu
Since the curve can be evaluated, it is possible to easily and quickly select a reliable foundation method including the evaluation for uneven settlement. In addition, since the test results are stored as digital data in the operation panel 3 of the penetration testing machine 1 and are taken into the basic construction method selecting device 4, data transmission via a public line or the like can be performed at high speed with high reliability. A few minutes after the test, the selection of the foundation method can be completed by the foundation method selection device 4 in a remote place. Therefore, coupled with the automatic operation of the penetration test machine 1,
The selection of a reliable foundation method can be realized even in a small building such as a house, within the limits of the construction period and construction cost. Further, various data input or converted into the basic construction method selecting device 1 and the selection result of the basic construction method can be accumulated and used as a database.

FIG. 16 shows a second embodiment of the present invention. This example is different from the above-described embodiment in that, instead of providing the flowchart tracing means 34 and the selection result display means 36 of FIG. 3, the conversion result obtained by the conversion means 30 is compared with a foundation method selection criterion to select a foundation method. Judgment means 4
3 provided on the screen of the display device 39 and FIG.
1, the basic construction method determining means 4 shown in the flowchart of FIG.
3 is provided with a route / result display means 44 for displaying the route following the process determined by the third method and the type of the basic construction method as the determination result. The judgment result by the construction method judging means 43 can be corrected by a manual input correcting means (not shown) for each detailed reference, that is, for each step in the flowcharts of FIGS. Since other configurations are the same as those of the above-described embodiment, corresponding portions are denoted by the same reference numerals, and redundant description will be omitted. In the case of this configuration, the measurement result is automatically determined, its trajectory is displayed in a flowchart, and this can be corrected, so that the automatic determination result can be used as a tentative guide, and the efficiency of the selection work of the foundation method can be further improved. I can do it.

[0043]

According to the basic construction method selecting apparatus and the selecting method of the present invention, a test result of a penetration test is converted into a predetermined data format and outputted, and a flowchart showing the basic construction method selection criteria and guidance for following the standard are displayed on a screen. Therefore, there is an effect that the selection of the optimum foundation method can be simply and quickly performed according to the display on the screen.

[Brief description of the drawings]

FIG. 1A is an explanatory diagram of a schematic configuration of a foundation method selecting device and a penetration tester according to an embodiment of the present invention, and FIG.
FIG. 2 is an explanatory diagram showing the configuration of the penetration tester by functional blocks.

FIG. 2 is a block diagram showing a conceptual configuration of a basic construction method selecting device.

FIG. 3 is a block diagram showing some details of the configuration of FIG. 2;

FIG. 4 is an explanatory diagram of an initial screen of the basic construction method selecting device.

FIG. 5 is an explanatory diagram of a survey summary input screen.

FIG. 6 is an explanatory diagram of a check list display screen.

FIG. 7A is an explanatory view of a measurement point display screen, and FIG. 7B is an explanatory view of a data display screen of test results by a sounding method.

FIG. 8 is an explanatory diagram of a display window of various selection data to be input to the data display screen.

FIG. 9 is an explanatory diagram of a creation process on a survey position map creation screen.

FIG. 10 is an explanatory diagram of a creation process subsequent to FIG. 8 on the survey position map creation screen.

FIG. 11 is an explanatory diagram of a display screen of a basic construction study flowchart.

FIG. 12 is an explanatory diagram of a display screen of a flowchart showing the contents of some steps in the flowchart.

13 is an explanatory diagram of a display screen of the limits C _u curve.

FIG. 14 is an explanatory diagram of a display screen of a basic construction method selection result.

15 is an explanatory view of various dimensions of the foundation used to calculate the limit C _u curve.

FIG. 16 is a block diagram showing a conceptual configuration of a basic construction method selecting apparatus according to another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Penetration test machine 3 ... Operation panel 4 ... Foundation method selection device 5 ... Screw point 6 ... Automatic load device 13 ... Control part 14 ... Depth detection means 15 ... Load detection means 16 ... Rotation detection means 18 ... Measurement result processing storage Unit 21 arithmetic processing unit 25 survey position map creation means 26 sounding test result processing means 27 basic work flow display and processing means 29 related data input auxiliary means 30 conversion means 31 conversion result processing means 32 basic work method Selection standard setting means 33 ... Flow chart display means 34 ... Flow chart tracing means 35 ... Limit adhesive force curve display means 36 ... Selection result display means 37 ... Input device 39 ... Display device 42 ... Basic construction method selection device components

Claims (7)

(57) [Claims] 1. A means for setting a plurality of detailed criteria for selecting a foundation method according to the ground condition and a basis for selecting a foundation method including a procedure for judging these detailed criteria; Means for displaying the type of the foundation method as a flow chart on the screen of the display device; conversion means for converting the test results of the penetration tester for ground survey into the data format used in the selection criteria for the foundation method; And a conversion result output means for outputting the result to the display device or another output device. With respect to the flowchart displayed on the screen, the user is prompted to input a predetermined response in each step indicating the detailed reference, and corresponds to the input result. A basic construction method selecting device comprising: a flow chart tracing means for advancing a response to a successive step. 2. The penetrating tester according to claim 1, wherein the penetrating tester is a device for testing by a Swedish sounding test method, wherein the penetrating depth, A load, and each detecting means for detecting the number of rotations, the control unit,
2. The foundation method according to claim 1, wherein a measurement result processing storage unit is provided on an operation panel of the penetration testing machine, and the operation panel converts the data obtained from each of the detection means into a predetermined data format and stores the data. Selection device. 3. The criteria for selecting a foundation method mainly include detailed criteria for evaluating the long-term allowable bearing capacity of the fabric foundation, and are defined as the adhesive strength of the ground necessary for safety with respect to breaking and consolidation settlement. The evaluation of the critical adhesive force curve indicated by the distribution in the depth direction of the obtained critical adhesive force value, wherein the critical adhesive force curve is set for each combination of the difference in the building load of the building and the foundation width, and the conversion is performed. 3. The foundation method selection apparatus according to claim 1, wherein the means includes a means for calculating an actually measured adhesion value indicating the adhesion of the ground at each depth. 4. The display means of the flowchart includes an evaluation step for the critical adhesion curve in a flowchart to be displayed, and in response to an input for selecting the evaluation step, a screen of the display device displays The foundation construction method selecting device according to claim 3, further comprising a limit adhesive force curve display means for displaying a limit adhesive force curve corresponding to a difference in building load and selection data of the foundation width and an actual measured adhesive force value. 5. A screen of the display device, in accordance with an input from an input device, draws a site range, a building range, and each measurement point of a ground survey, and displays the drawn diagram on an actual site. 5. A survey position map creating means for displaying dimensions, and a related data input assisting means for assisting a ground survey and inputting predetermined data necessary for using the survey result. Basic construction method selection device described. 6. A means for setting a plurality of detailed criteria for selecting a foundation method according to the ground condition and a basis for selecting a foundation method including a procedure for judging these detailed criteria; Means for displaying the type of the foundation method as a flowchart on the screen of the display device, conversion means for converting the test results of the ground inspection penetrating tester into values used in the selection criteria for the foundation method, conversion by the conversion means A method for determining a foundation method by comparing the result with the basis method selection criteria, and displaying a route that follows the process determined by the method determination means in a flowchart displayed on a screen of the display device, A basic construction method selecting device comprising: a route / result display means for displaying a type of a basic construction method as a determination result on the screen. 7. A method for selecting a foundation method using a computer device, wherein the computer device includes a plurality of detailed criteria for selecting a foundation method according to a ground condition and a basis method selection criteria including a procedure for determining these detailed standards. And conversion means for converting the test result of the penetration tester for ground investigation into a data format used in the foundation method selection standard, and displaying the foundation method selection standard as a flowchart on a screen of a display device, and In each step, a predetermined response is urged, and a flowchart tracing means for tracing the flowchart in response to the input is set, and the flowchart displayed on the screen is obtained by the conversion means for each step. A basic construction method selection method that selects a basic construction method by tracing while inputting a response based on the data entered.