JPS6331614B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a construction management system for a deep mixing treatment ground improvement method, and more particularly to a system for automatically displaying the penetration and extraction trajectory of the tip of a treatment machine.

In recent years, the so-called deep mixing method has attracted attention, in which a rotating body with stirring blades is inserted into the soil and a hardening material such as cement is added while stirring and mixing the deep layer of the ground to construct improved piles. It has been put into practical use as an improved construction method. However, a particular problem with this construction method is that the guide steel pipe that supports and guides the stirring blades is affected by various factors such as earth pressure, water pressure, and soil layers during the treatment process, which spans several tens of meters. This causes complex deformation, which results in uneven construction of planned improved piles, resulting in unimproved portions. In order to avoid this, conventionally the inclination angle of the guide steel pipe has been determined by using multiple inclinometers or by transit observation, but since the measurement is done manually, reading errors and observation errors occur, resulting in poor reliability. , and the speed of construction was also lacking, which became a problem in construction management.

In view of the above-mentioned problems of the prior art, it is an object of the present invention to provide a construction management system that can accurately and quickly record and display the penetration and extraction trajectory of the tip of a treatment machine in a deep mixing treatment method.

The purpose of this is to use the observation point depth automatically detected by the depth gauge and tide gauge, the hull position automatically detected by the light wave distance meter, the hull inclination angle automatically detected by the inclination meter, the processing machine head inclination angle, and the processing machine guide. A construction method in which the penetration trajectory of the tip of the treatment machine is determined based on the steel pipe inclination angle, and this penetration trajectory is automatically displayed by wrapping it over time with the penetration trajectory of the tip of the treatment machine when driving existing piles. This is achieved by implementing a management system.

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 is a side view showing an example of offshore construction using a deep mixing treatment apparatus to which the construction management system according to the present invention is applied. In the figure, 1 is a work boat with a tower 2 built in the center, a cement plant 3 for supplying cement as a hardening material, a cement silo 4, and a control room equipped with various control devices. 5 and a hydraulic unit 6 are provided. 7 is the processing machine main body, which is suspended from the top of the tower 2 by a wire 8, covered by a steady rest 9, and guided by a sub-leader 9' so that it can move up and down along the tower 2. There is. There is a reducer 10 at the head of the processing machine main body 7,
A plurality of drive shafts 12, 12 (usually 6 shafts) each having a stirring blade 11 at the tip are rotatably extended downward from here, and the drive shafts 12, 12 also extend downward from the reducer 10. It is supported and guided by a guide steel pipe 13 provided therein. And in construction,
When the drive shafts 12, 12 are rotated and the stirring blade 11 penetrates into the soil, cement is injected from the tip of the stirring blade 11, and when the stirring blade 11 is rotated, cement and soft ground are mixed, and after being pulled out, An improved pile will be constructed there. In addition, the plurality of stirring blades 11 are arranged so as to overlap each other, so that a wall-shaped improved pile of an appropriate size can be formed in one construction.

Further, 14 is a processing machine head inclinometer, 15 is an inclinometer in the guide steel pipe, 16 is a hull inclinometer, and 17 is a tide gauge, which are located in the control room along with other depth gauges and light wave distance meters (not shown). It is connected to an arithmetic unit 18 (computer) in the processor 5 by an electrical signal, and is used as an information source for tracking and managing the tip trajectory of the processor main body 7, which will be described later.

Next, a system for automatically displaying the tip trajectory of the processing machine main body 7 according to the present invention will be explained based on FIG. 2 and a processing flow diagram.

First, in step A, in order to obtain the depth of an arbitrary observation point, an automatic depth gauge that can measure from the amount of displacement is installed between the processing machine main body 7 and the tower 2, and the marking depth is recorded and input. Since the marking depth changes depending on the tide level, in step B, in order to correct the observation point depth, changes in the tide level are constantly detected by the tide gauge 17 and this value is automatically input. At this point, the automatic depth gauge activates this system,
If the program depth is commanded to the computer, it will act as a starting command device.

Next, in step C, as shown in Figure 3, two light sources O ₁ and O ₂ are placed on an arbitrary base line X, and the distance L ₀ between the light sources O ₁ and O ₂ is first detected using a light wave distance meter. death,
Next, detect the horizontal distance L ₁ from the baseline X to the center of planned improved pile position No. 1-1, and the distance L ₂ from the light source O ₂ to the center of planned improved pile position No. 1-1, respectively. The hull position (center of buoyancy O point) is determined from these data, and this is input in a bipolar display of front and rear, left and right.
The hull position obtained through this process can be confirmed accurately to the millimeter level.

Next, in step D, the contact coordinate point I between the processing machine main body head (reducer 10) and sub-leader 9' is determined based on the hull inclination angle detected by the hull inclinometer 16, and in step E, the processing Based on the inclination angle of the processing machine head detected by the machine head inclinometer 14, the wire attachment point coordinates J in the guide steel pipe 13 are determined and inputted respectively.

In addition, in the F process, the inclination angle of the processing machine guide steel pipe is detected by the inclinometer 15 in the guide steel pipe, and based on the above-mentioned data, it is calculated in the G process to determine the tip coordinate point K, and this is printed or diagrammed as appropriate in the H process. become

In addition, in this system, since observation points at arbitrary depths are ordered in advance, this system processing is performed for each arbitrary depth, and construction management can be performed while looking at the charts obtained.

FIGS. 4 and 5 show examples of charts obtained by this system processing. These diagrams were drawn using an X-Y plotter, and a program for calling up existing piles was installed in advance.
If the drawings are made sequentially according to the order of the construction piles, the fourth
If the left-right lap joint diagram shown in the figure is drawn at a ratio of 1:1 to the existing pile, the longitudinal lap joint diagram shown in FIG. 5 will be obtained. In the figure, the numbers in the vertical column indicate the penetration depth of the tip of the processing machine, the numbers in the horizontal column indicate the lap joint width, and the curved lines in the figure indicate the treatment for each pile number (1-1, 1-2,...). Represents the tip trajectory of the machine.

The above drawing data is recorded on a magnetic tape or floppy disk so that it can be reproduced (drawn) and compared as needed.

As explained above in detail, the construction management system for the deep mixing treatment method according to the present invention automatically observes the construction depth, tide level, hull position, hull inclination, inclination of the treatment machine body, etc. The trajectory is automatically displayed by wrapping it over time with the penetration trajectory of the tip of the processing machine when driving an existing pile, so you can accurately and quickly understand the pile driving status by comparing it with the existing pile. This has significantly improved the reliability of construction management.

[Brief explanation of the drawing]

Fig. 1 is a side view showing an example of offshore construction using a deep mixing processing equipment to which the construction management system according to the present invention is applied, Fig. 2 is a processing flow diagram in the processing machine tip trajectory automatic display system according to the invention, and Fig. 3 4 is an explanatory diagram showing a method of automatically detecting the hull position, and FIGS. 4 and 5 are diagrams showing examples of charts obtained by the processing of this system. 14... Processing machine head inclinometer, 15... Guide steel pipe inclinometer, 16... Hull inclinometer, 17... Tide level gauge.

Claims (1)

[Claims] 1. Observation point depth automatically detected by depth gauge and tide gauge, hull position automatically detected by light wave distance meter, hull inclination angle automatically detected by tilt meter,
The penetration trajectory of the processing machine tip is determined based on the processing machine head inclination angle and the processing machine guide steel pipe inclination angle, and this penetration trajectory is wrapped over time with the penetration trajectory of the processing machine tip when driving existing piles. A construction management system for the deep mixing method, which is characterized by automatically displaying the results.