JPH0241624B2 - - Google Patents

Description

[Detailed description of the invention] [Technical field to which the invention pertains] The present invention relates to a control method for sliding formwork, and in particular, in sliding formwork construction methods, etc., the poured concrete has sufficient strength to support its own weight. Sliding formwork that can be moved at an appropriate speed or to an appropriate position depending on the strength of the poured concrete by measuring the extent to which it has strength. This relates to the control method.

[Prior art and its problems]

As a method of measuring the strength of poured concrete and sequentially pouring concrete according to the strength, there is, for example, a sliding formwork method.

In this construction method, once the poured concrete poured into the sliding formwork reaches sufficient strength to support its own weight, the sliding formwork is controlled to move gradually, and concrete is simultaneously poured in the direction of movement. Continuous pouring is performed to form a predetermined concrete structure.

Here, the moving speed of the sliding formwork is greatly influenced by the depth within the formwork at which the poured concrete that has reached the required strength is located, and work efficiency may deteriorate depending on how this is determined.

Conventionally, in order to efficiently control the moving speed of this sliding formwork, the strength of poured concrete at various locations has been measured and the strength has been controlled in accordance with the measured strength. In this case, the strength can be measured by estimating the young strength from the relationship between the mixture (blending) state of the poured concrete and the pouring time, or by using a fixed compression type strength tester (strength tester). It has been adopted.

By the way, the strength of poured concrete to support its own weight is generated when it reaches a predetermined hardening state. The hardening state of this poured concrete varies greatly depending on temperature and humidity, and there are significant differences between the sunny side, the shaded side, the windward side, and the leeward side of the structure. Therefore, when moving the formwork, it is necessary to determine the appropriate moving speed of the sliding formwork after understanding the strength of the poured concrete in each part of the poured concrete wall. Moreover,
The outside and inside of poured concrete may have different strengths.

Therefore, the estimation method described above has a problem in that it cannot grasp the actual strength of poured concrete. In addition, with conventional fixed compression type strength testers, the strength detection position is fixed, so if the outside temperature, mix of poured concrete, pouring time, etc. change, the hardening state will differ at each position. and their strength is different,
It has the disadvantage of making it difficult to make appropriate decisions. Furthermore, a sample is taken and its strength is measured using a strength testing machine, but there is a problem that the sample and the actual state are different.

Moreover, when these strength measurement methods are used, the actual strength of the poured concrete at the time of sliding formwork movement differs from the strength at the time of measurement, and furthermore, the strength differs between the outside and inside of the poured concrete. Therefore, the current situation is that the sliding formwork cannot be moved sufficiently in an appropriate condition.

[Purpose of the invention]

The present invention has been made in view of the drawbacks and problems of the prior art, and eliminates the drawbacks and problems of the prior art, and
The purpose of the present invention is to provide a control method for sliding formwork that can appropriately control the movement of sliding formwork depending on the actual strength of poured concrete.

[Key points of the invention]

However, in order to achieve this purpose,
The characteristics of this sliding formwork control system are the sliding formwork in which concrete is placed in sequence, and the penetration rod insertion means that applies a load to the penetration rod and inserts the penetration rod into the poured concrete whose surface portion has not yet hardened. a sliding formwork moving mechanism that moves the sliding formwork in a predetermined direction; and a control device, the control device being configured to control the insertion resistance of the penetration rod against the poured concrete in the sliding formwork to a predetermined value. A penetration amount measuring means for measuring the penetration depth at a value, and a calculation means for calculating the thickness of poured concrete in a predetermined hardening state in the pouring direction within the sliding frame from this penetration amount, and the same hardening means for determining the amount of deviation between the two by comparing the calculated value with a set value that determines the appropriate thickness of the poured concrete in the pouring direction within the sliding frame, and the amount of deviation; According to this, the sliding formwork moving mechanism is controlled so that the sliding formwork moves in a direction in which this amount of deviation does not occur.

By measuring the penetration resistance in this way, the position of the poured concrete in a predetermined hardening state can be obtained in the form of the penetration amount of the penetration rod, and by subtracting this penetration amount from the length of the sliding formwork, It is possible to calculate the thickness (actually measured value) of poured concrete in a predetermined hardened state in the pouring direction within the sliding formwork.

Then, the preset position of the appropriate sliding form [corresponding to the appropriate thickness (target value) of poured concrete in the same hardening state in the pouring direction within the sliding frame] and the actual measured value are calculated. The amount of deviation between these is obtained by comparing them by calculation or display, etc., and the sliding formwork is moved upward at an appropriate speed or to an appropriate position so as to eliminate this amount of deviation. becomes possible.

As a result, the sliding formwork can be moved while completely ignoring uncertain factors such as outside temperature and reliably capturing the actual strength state.

Next, to explain the principle of this invention using the sliding formwork method as an example, the concrete poured into the sliding formwork is divided into multiple layers at certain intervals in layers within the sliding formwork. are entered in sequence.
As can be seen from the graph in Figure 1, the strength of poured concrete poured at a certain location gradually increases with the passage of time (H: hour), and eventually reaches a constant strength (Kg/cm ² ). Become.

On the other hand, the poured concrete poured into the sliding formwork has a difference in strength between the upper and lower parts of the formwork due to the difference in pouring time, and the strength distribution within the formwork is as shown in Figure 2. In the figure, a indicates poured concrete, and b indicates sliding formwork.

As shown in FIG. 3, when the penetrating rod c is inserted from above into the poured concrete in this state, there is a certain relationship between the insertion force and the depth of the penetrating rod c.

That is, the strength of the poured concrete is related to the hardening state of the poured concrete, and this hardening state is related to the penetration resistance of the penetration rod c. Therefore, when the penetration resistance against the penetration rod is measured in relation to the penetration depth from the surface of the poured concrete, the results are shown in FIGS. 4 to 6.

That is, Fig. 4 is a graph showing the relationship between penetration depth M [cm] from the surface of poured concrete and penetration load P [Kg], and Fig. 5 shows the relationship between penetration depth M [cm] from the surface of poured concrete and penetration depth from the surface of poured concrete. A graph showing the relationship between depth M, load Pc [Kg] and vibration time T [min] when vibration is applied to the penetration rod, and Figure 6 shows the relationship between penetration depth M from the surface of the poured concrete. and impact load
It is a graph diagram showing the relationship with the number of blows N when Pk [Kg] is applied to the penetrating rod.

Now, if we consider the penetration resistance of the penetration rod in relation to the penetration load P, the penetration load P and the penetration amount M gradually increase as the load P increases, as shown in Figure 4, and reach the limit value. When P ₁ [Kg] is exceeded, even if the load increases, the penetration amount becomes a nearly constant value M ₁ [cm], and when the load increases further, it hardens to the specified state at a load of P ₂ [Kg]. The layer of poured concrete is destroyed, and the amount of penetration increases again in accordance with the load.

Here, the value at which the penetration amount M becomes a nearly constant value _M1 is:
It corresponds to the hardened state where it has reached sufficient strength to support its own weight.

Note that the value of the penetration amount M ₁ with respect to the limit value P ₁ is related to the elapsed time when concrete is poured and the mixing state, and decreases with time, as shown by the dotted line.

Next, if we consider the penetration resistance of the penetration rod in terms of the relationship between load and vibration, it will be as shown in Figure 5.

As shown in this figure, when vibration is performed, as the vibration time T passes, the initial penetration amount M is large, but then it gradually increases, and the rate of increase in the penetration amount M gradually decreases. Draw a curve that approaches a constant value. As mentioned above, the value at which the penetration amount M becomes a constant value for a while corresponds to the hardening state in which the concrete has reached sufficient strength to support its own weight, and depends on the elapse of time that the concrete is poured and In relation to the blending condition,
As shown by the dotted line, it decreases over time.

Next, when considering the penetration resistance of the penetration rod in terms of the relationship between the load and the number of strikes N, the result is as shown in FIG. As seen in this figure, the penetration amount M gradually increases as the number of strikes increases, and the rate of increase in the penetration amount M gradually decreases, drawing a curve that approaches a constant value. As mentioned above, the value at which the penetration amount M becomes constant for a while corresponds to the hardening state in which the concrete has reached sufficient strength to support its own weight, and depends on the elapsed time that the concrete was poured and the mix. It is related to the state and decreases over time, as shown by the dotted line.

Here, the penetration amount M in the graph of each figure corresponds to the penetration resistance, and the graph of each figure can be read as the penetration resistance.

From the above measurement results, it can be seen that the penetration resistance increases as the poured concrete hardens. When the poured concrete reaches a hardness state that is strong enough to support its own weight, the penetration resistance approaches a substantially constant value. Therefore, by measuring the penetration resistance of the poured concrete, it is possible to know the state of the strength of the poured concrete. As a result, the thickness of the poured concrete at a given strength state can be measured and controlled by comparing it with a predetermined target thickness for moving the sliding formwork to the actual strength state. You can move in an appropriate manner.

[Embodiments of the invention]

An embodiment of this application will be described below based on the drawings.

FIG. 7 is a block diagram of a control system for a sliding formwork according to an embodiment to which the present invention is applied.

1 is a control system for the sliding formwork, which includes a penetrating rod insertion device 3, a load state detector 4, and a predetermined driving power to the penetrating rod insertion device 3 according to a drive control signal.
a drive circuit 5, a movement amount detector 6 for detecting the amount of movement of the penetration rod 2, a control device 7, a display 8, a keyboard 9, a sliding formwork 10 as a frame for the concrete 11, The penetrating rod insertion device 3 includes a sliding formwork moving mechanism 12, and a penetrating rod 2, and applies a load to the penetrating rod 2 according to driving power.

Here, the processing device 7 (hereinafter referred to as CPU 7) is an information processing device using a so-called microcomputer, and is composed of a microprocessor, a memory, an interface, etc., and includes a load control means 71, a penetration depth calculation means 72, and a deviation amount. It is composed of a calculation means 73, a setting value recording means 74, and a control means 75, and these functions are realized by a program.

The load control means 71 sends a predetermined drive control signal to the drive circuit 5, and generates a drive stop signal to the drive circuit 5 when the drive power reaches a value that generates a predetermined load. The penetration depth calculation means 72 receives the signal from the movement amount detector 6, and
A sliding formwork 10 in which the insertion resistance of the penetration rod 2 is at a predetermined value
Calculate the penetration depth based on the upper side of. Also,
The deviation amount calculating means 73 calculates the thickness of concrete in a predetermined hardened state with respect to the lower side of the sliding formwork 10 as a reference, and compares the calculated thickness with the preset thickness of the poured concrete 11. The difference value is calculated as the amount of shift of the sliding formwork 10.

On the other hand, the setting value recording means 74 records the length K of the sliding formwork 10 inputted from the keyboard 9 and the poured concrete 11 set in advance as a reference for movement.
The target value Sn as the thickness of a predetermined cured state is stored. Then, the control means 75
In accordance with the deviation amount obtained from the deviation amount calculation means 73, the sliding formwork 10 moves in a direction in which the thickness of the concrete 11 in a predetermined hardened state with respect to the lower side of the sliding formwork 10 becomes the target value Sn. The sliding formwork moving mechanism 12 is controlled so as to. In this case, the movement control of the sliding formwork moving mechanism 12 increases or decreases the speed of the sliding formwork 10 so that the amount of deviation disappears according to the amount of deviation, or moves the sliding formwork 10 to a predetermined position.
It's up to you to move.

Here, the load state detector 4 includes an ammeter 4a inserted between the drive circuit 5 and the penetrating rod insertion device 3, and an A that converts the output voltage value of the ammeter 4a into a digital signal and inputs it to the CPU 7. /D converter 4b. In addition, the load control means 7 of the CPU 7
1 receives the signal from the load state detector 4, and also receives the measurement position number and applied load value information from the keyboard 9, and also receives the penetration rod insertion device 3.
A predetermined signal indicating the upper limit position and lower limit position of the penetration rod 2 is received from. Then, the penetration depth calculation means 72
receives a signal from the movement amount detector 6 and further receives a predetermined signal from the penetration rod insertion device 3 indicating the upper limit position and lower limit position of the penetration rod 2, and sends information on the calculated penetration depth to the display 8. and display it corresponding to each measurement position in the form of a graph.

On the other hand, the penetration rod insertion device 3 houses the penetration rod 2, and also includes a load loading mechanism 20 and fixed arms 21, 21 attached to a housing 20a of the load loading mechanism 20 via brackets 22, 22. and is installed on the top of the sliding formwork 10.

That is, the engaging portion 21 of the fixed arms 21, 21
a, 21a are the upper ends 10a, 10a of the sliding forms 10, 10 forming both walls of the poured concrete 11;
The load application mechanism 20 is fixed in a removable state.

The housing 20a of the load application mechanism 20 has a cylindrical shape with a closed top, and the motor 23 and the penetration rod 2 are housed inside the housing 20a.

Here, the penetrating rod 2 is configured to be moved in and out of the housing 2a by rotating the motor 23 in forward and reverse directions.

That is, the penetrating rod 2 has a pipe shape with a closed end 2a, and is slidably supported by a bearing 25 provided at the lower end of the housing 20a. The shaft of the motor 23 is coupled to a screw shaft 24 which is threaded, and the screw shaft 24 is fitted inside the penetrating rod 2 and engages with a threaded portion 2b at the rear end of the penetrating rod 2. ing. As a result, the penetrating rod 2 moves forward and backward in accordance with the rotation of the motor 23.

In addition, in the upper closing part 20b of the housing 20a,
A movement amount detector 6 for detecting the movement amount of the penetration rod 2 is installed. This movement amount detector 6 uses a rotary encoder, the shaft of which is coupled to the shaft of the motor 23.

Here, in order to detect the upper and lower limits of the movement position of the penetrating rod 2, limit switches 26 and 27 are provided above and below the inner wall surface of the housing 20a, and the limit switches 26 and 27 are located at the ends of the threaded portion 2b. It is activated when pressed. Note that the upper limit switch 26 is located at the upper limit position 10 of the sliding formworks 10, 10.
When the tip 2a of the penetrating rod 2 matches the engagement positions 21a, 21a of the fixed arms 21, 21 that engage with the fixed arms 21, 10a, the penetrating rod 2 is positioned to operate, and in this position it is in the "ON" state. Become.

Signals from these limit switches 26 and 27 are input to the CPU 7 as signals for the upper limit position and lower limit position of the penetrating rod 2, respectively.

Now, the drive power to the motor 23 is supplied to the drive circuit 5.
The penetrating rod 2 is supplied from the poured concrete 1
A predetermined load is generated in relation to 1.

Next, control of penetration into the poured concrete 11 and control of the amount of movement of the sliding formwork 10 will be explained.

First, input a predetermined function key on the keyboard 9 shown in FIG. For example, input 40 cm as the preset thickness of the poured concrete 11 at . Next, a limit value P ₁ is determined corresponding to the hardness at which the poured concrete 11 has reached sufficient strength to support its own weight, depending on the pouring time and mixing conditions for the poured concrete 11 (see Figure 4). ) Enter the numerical value Ps [Kg] that indicates a load value greater than or equal to ). Then, information on measurement points for the poured concrete 11 in which the penetration rod 2 is set is input. However, the load Ps shall not exceed the load _P2 at which the layer of poured concrete that has hardened to a predetermined state will break. Note that these values were determined in advance through tests.

Among the input information from the keyboard 9, the length of the sliding formwork 10 is 120 cm and the target value is 40 cm.
It is sent to the setting value storage means 74 of the CPU 7 and stored therein. In addition, input information other than this is provided by CPU 7.
is input to the load control means 71 of. When the load control means 71 of the CPU 7 receives this input information, it stores information about the measurement point in a predetermined area of the memory, and from this load Ps, the motor 23 of the penetrating rod insertion device 3 generates a corresponding current to generate the load Ps. valueIs
(target current value) and similarly stores it in the memory. Then, a drive control signal (starting signal + forward rotation signal) is sent to the drive circuit 5. The drive circuit 5 receiving this drive control signal controls the motor 23
Rotate in the forward direction and pour the penetration rod 2 into the concrete 1.
A predetermined power to be inserted into the motor 23 is supplied to the motor 23.

As a result, the motor 23 is driven to rotate in the forward direction, the screw shaft 24 is rotated in the forward direction, and the penetrating rod 2 moves forward toward the surface of the poured concrete 11. In accordance with the rotation of the motor 23, a signal corresponding to the rotation amount of the motor 23 is sent from a movement amount detector 6 composed of a rotary encoder to the CPU 7.

When the penetration rod 2 moves forward and matches the reference position 10c, the limit switch 26 becomes "ON", and when this signal is input to the CPU 7, the "ON" state signal from the limit switch 26 is used to calculate the penetration depth. At this point, the penetration depth calculation means 72 counts the signal from the movement amount detector 6 and calculates the penetration depth from the reference position 10c. Then, the penetration depth calculation means 72 receives information corresponding to the measurement position input from the keyboard 9 from the load control means 71, and sends this and the calculation result to the display device 8.

The display device 8 displays the reference position 1 of the upper limit of the sliding formwork 10 of the penetration rod 2 according to the calculation result on the bar graph corresponding to the information corresponding to the measurement position.
The depth from 0c is displayed. In this case, the penetration depth calculating means 72 calculates the depth by converting it into the depth from the surface of the poured concrete 11, and the display device 8 is configured to display the depth from the surface of the poured concrete 11. It's okay. In this case, the position from the reference position 10c of the sliding formwork 10 to the surface of the poured concrete 11 is measured in advance and inputted into the CPU 7.

On the other hand, the load control means 71 receives a signal from the load state detector 4 after a certain period of time after starting the motor 23 (after entering the steady operation state), and the drive circuit 5
The current value I of is the target current value stored in the memory.
As a result of this determination, if I<Is, drive control is continued, and when I≧Is, a drive stop signal is sent to the drive circuit 5 to stop the insertion operation of the penetrating rod 2. Stop.

In this way, the penetration rod 2 is inserted into the poured concrete 11, and at this time, a load is applied to the penetration rod 2 by the motor 23 according to the hardening state of the poured concrete 11, and the load is The motor 23 rotates accordingly. Then, when the drive current value sent out from the drive circuit 5 reaches the set value Is, the load becomes the load Ps, and a drive stop signal is sent out from the load control means 71 of the CPU 7.
The output of the drive circuit is stopped, and the rotation of the motor 23 is stopped. At this time, at the same time, the penetration depth calculation means 7
2 is supplied with an operation stop signal, and the calculation process is stopped.

As a result, the display device 8 displays and measures the depth of the layer of poured concrete 11 that has a strength corresponding to the set load Ps.

Here, when the penetration depth calculation means 72 receives the operation stop signal, the penetration depth calculation means 72 sends information on the calculation result regarding the penetration depth (penetration depth S) to the deviation amount calculation means 73. do. The deviation amount calculation means 73 calculates the length K (=120 cm) of the sliding formwork 10 stored in the set numerical value storage means 74 and the target value Sn (=
40cm), and from the calculated penetration depth S, first calculate the length from the lower limit position of the sliding formwork 10.
Calculate Sk as Sk=K-S (Sk=80cm), then calculate the difference Q from the target value Sn as Q=Sn-Sk (calculation results include positive and negative signs) .

Then, this calculated value is sent to the control means 75 as the amount of deviation of the sliding formwork 10. The control means 75 is
Upon receiving the information Q on the amount of deviation, a control signal is sent to the sliding form moving mechanism 12 to move the sliding form 10 in a direction in which this amount of deviation Q disappears. As a result, the sliding formwork 10 is adjusted according to the amount of deviation so that the thickness of the poured concrete in a predetermined hardened state when viewed from the lower limit of the sliding formwork 10 is maintained at the target value Sn.
is changed to a predetermined speed or moved to a predetermined position by the sliding formwork moving mechanism 12.

Specifically, when the hardening state of the poured concrete has progressed to a level higher than the target value set for the sliding formwork 10, the sliding formwork 10 is made faster than a predetermined reference speed, and the speed reaches the target value. When it is lower, the sliding formwork 10 is made slower than the predetermined reference speed. In this case, the increase/decrease in the speed of the sliding formwork 10 is as a function of the difference value Q (shift amount).
It is increased or decreased according to this value.

Moreover, when managing by position, the sliding formwork 10 is moved upward or downward to a position where the lower limit of the sliding formwork 10 is located at a position where the thickness of the cured state becomes the target value.

In addition, the movement of the sliding formwork 10 in this case is not based on the difference value Q of one measurement point, but by taking a plurality of measurement points, taking the average value of these, and using this average value as the amount of deviation. , the movement of the sliding formwork 10 may be controlled according to this average value. The sliding formwork 10 is controlled by such a system periodically at predetermined intervals depending on the speed and position.

By the way, after the penetration rod 2 has been inserted to a predetermined hardened state and the insertion is stopped, the load control means 71 causes the drive circuit 5 to control the penetration rod 2 after a certain period of time after the insertion is stopped. A pullout drive control signal (starting signal + reverse rotation signal) is sent out to pull out the penetrating rod 2 from the poured concrete 11. This control is performed until the limit switch 26 is in the "ON" state, and the load control means 7
1 receives the "ON" state signal from the limit switch 26 (or after a certain period of time), it sends out a drive stop signal and stops its operation. Here, the calculated value of the penetration depth calculating means 72, the set value Ps
etc. are reset to the initial state, but the display on the display device 8 remains in its display state until a reset signal is input from the keyboard 9.

Note that when the insertion amount of the penetration rod 2 reaches the lower limit value, a signal is sent from the limit switch 27 to the CPU 7, and the load control means 71 and the penetration depth calculation means 72 receive this signal and similarly issue a drive stop signal. is sent to the drive circuit 5, an operation stop signal is sent to the penetration depth calculation means 72, and then a pull-out drive control signal is sent to stop the penetration rod 2 when it reaches the upper limit. Moreover, while the process of pulling out and driving the penetration rod 2 is being performed, the penetration depth calculation means 72 does not operate.

In this way, the depth of poured concrete according to the set load Ps is measured, and the sliding formwork 10 is controlled. Here, the set load Ps means the maximum value to be applied to the penetration rod 2, and this is set in accordance with the penetration resistance of the poured concrete 11. Moreover, this penetration resistance corresponds to the strength of the poured concrete 11. Therefore, the CPU
If a conversion table or conversion formula for determining the current value Is from the intensity is stored in the memory of 7, similar processing can be performed without setting the load Ps.

Note that when calculating the corresponding current value Is from the set load Ps, a conversion formula may be used or a storage table storing corresponding conversion data may be referred to.

Next, the measurement location for the poured concrete 11 is changed, and similar measurements are made at one or more locations, and each measurement result is displayed. Then, the corresponding sliding formwork is controlled in the same way, and the sliding formwork corresponding to that measurement point is moved.

In this way, the sliding formwork is controlled according to the strength state of the poured concrete at each measurement point.

Figures 8A and 8B show measurement points A, B, and C in the poured concrete 13 in the embodiment shown in Figure 7, with the penetration resistance set to a load value that has sufficient strength to support its own weight. , D, and a graph showing the display state of the display device 8 in relation to the penetration depth M of the poured concrete 11.

In the figure, reference numeral 14 indicates a main body portion including a CPU 7, a display device 8, a drive circuit 5, etc. in the sliding formwork control system.

As shown in FIGS. 8A and 8B, the strength state of poured concrete at any location can be known, and the sliding formwork 10 can be controlled in accordance with the results to proceed with the work in sequence. Can be done.

By the way, in this embodiment, the target value is set to a constant value, but it may be set as a constant range, for example, 40 cm±10 cm. In addition, in the embodiment, the load applied to the penetration rod 2 is detected and whether or not the set load state is detected.
As shown in the figure, for poured concrete in a hardened state that exhibits the strength necessary to support its own weight, the load must be P ₁ or more and within the range that does not destroy the hardened state of the poured concrete (load P ₂ or less)
Then, the penetration depth becomes almost constant. Therefore, the motor 23 of the penetrating rod insertion device 3 is adjusted in advance to the extent that the set load in the above range is applied to the penetrating rod 2.
If a predetermined driving power is supplied to the penetrating rod 2, the load state detector 4 becomes unnecessary.
will automatically remain at a penetration depth that has the required strength to support its own weight.

Next, another embodiment of this sliding formwork control system will be described.

In this embodiment, means for applying a load and measuring penetration resistance is added to the penetration rod 2 in the previous embodiment. Therefore, the current value Is of the drive current
Accordingly, the load on the penetrating rod 2 is directly measured without generating a stop signal, and the insertion of the penetrating rod 2 is stopped.

That is, the specific configuration is that a strain gauge (or load cell) is attached to the lower part of the threaded part 2b of the penetrating rod 2, near the surface, and the strain in that part is converted into an electric quantity, which is then transferred to the penetrating rod 2. Detected as a load corresponding value. This amount of electricity is then input to the CPU 7 via the A/D converter. The load control means 71 of the CPU 7 detects the load P by the signal from the strain gauge.
and compare it with the set load Ps. As a result of this comparison, when the detected load P [Kg]<the set load Ps [Kg], the motor 23 continues to be driven and the load on the penetration rod 2 continues. Then, when the detected load P≧set load Ps, the load control means 7 of the CPU 7
1 receives this signal, a drive stop signal is issued to the drive circuit 5, and the depth of the penetration rod 2 calculated by the penetration depth calculation means 72 is displayed on the display device 8. Then, in accordance with the result calculated at this time, the deviation amount calculation means 73 calculates the deviation amount, and the control means 75 operates, so that the sliding formwork 10
is controlled by the sliding formwork moving mechanism 12. On the other hand, a pull-out drive control signal is then sent to the penetrating rod insertion device 3, and the penetrating rod 2 stops when it reaches the upper limit.

In this way, by installing a strain gauge on the penetrating rod 2, it is possible to stop the insertion of the penetrating rod 2 at the directly determined load Ps.

Next, another embodiment in which a load is applied to the penetration rod 2 and vibration is applied will be described.

FIG. 9 is a block diagram of another embodiment of the sliding formwork control system to which the present invention is applied. is installed, the penetration resistance is measured by detecting the acceleration, and the poured concrete 1
1 strength state and the sliding formwork 10 is manually controlled. Components that are the same as those in FIG. 7 are designated by the same reference numerals.

Here, the CPU 70 is the CPU 7 in FIG.
However, due to manual control, there is no deviation amount calculation means 73 and set value storage means 74, and the deviation amount of the sliding formwork 10 is determined by the operator by referring to the display state on the display 8. grasp. Then, the sliding formwork 10 is moved by inputting this shift amount from the keyboard 9. Therefore, the control means 75 is directly controlled by signals from the keyboard 9. The target depth for the sliding formwork 10 is displayed in advance on the display 8 as a target depth value 8a.

Note that the target depth value 8a is displayed by the penetration depth calculating means 72 in response to an input signal from the keyboard 9, and the target depth value 8a is determined by the length K of the sliding formwork 10. (the lower limit) minus the target value Sn (the value from the upper limit).

Here, 30 is a vibration mechanism, and the penetrating rod 2
It adds vibration to the This vibration mechanism 30
adopts a configuration in which the threaded portion 2b of the penetrating rod 2 and the outer peripheral fixing member 31 of the penetrating rod 2 are joined via a spring 32, and a vibration generator 33 is installed further outside the outer peripheral fixing member 31. Accordingly, the penetration rod 2 is inserted while being vibrated.

On the other hand, 34 is an accelerometer, and as shown in FIG. 10, an arm 36 has a weight 35 at its tip.
A strain gauge 37 is provided on the arm 3.
6 is fixed to the penetrating rod 2 via a bracket 38. The strain gauge 37 detects the strain caused by the vertical vibration of the arm 36 as acceleration. Therefore, when the acceleration is large, a sine wave signal with a large amplitude is generated, and when the acceleration is small, a sine wave signal with a small amplitude is generated. This detection signal is input to the load control means 71 of the CPU 7 via the A/D converter 12.

By the way, in this embodiment, instead of the set load Ps, the set acceleration α and information on the measurement point are input from the keyboard 9.

These input information are then transmitted to the load control means 7.
1, the set acceleration α is converted into a corresponding set amplitude voltage value Vα, and each is stored in the memory. Next, a drive signal is outputted from the load control means 71 to the drive circuit 5 to apply a load to the penetrating rod 2, and a driving signal is sent to the vibration generator 32 to vibrate the penetrating rod 2.

At this time, the signal from the accelerometer 34 is A/D converted by the A/D converter 12 and the load control means 71
is received, its amplitude value is determined, and the obtained amplitude value V of the detected voltage is compared with the amplitude value Vα of the set voltage corresponding to the set acceleration α.

As a result of this comparison, when the detected voltage amplitude value V>the set voltage amplitude value Vα, the motor 23 continues to be driven, the load on the penetration rod 2 continues, and the vibration continues. Then, when the detected voltage amplitude value V≦the set voltage amplitude value Vα, the load control means 71 of the CPU 7 issues a drive stop signal to the drive circuit 5 and the vibration generator 33, and the penetration depth calculation means 72 The calculated depth of the penetration rod 2 is displayed on the display device 8. Thereafter, a withdrawal drive control signal is sent out, and the penetrating rod 2 is stopped when it reaches the upper limit.

Now, since the target depth 8a is displayed in advance on the display 8, the operator can read the difference value from the displayed depth of the penetration rod 2. Therefore, the operator uses the keyboard 9
After inputting the function key for controlling the upper sliding formwork 10, the read difference value and its sign are inputted from the keyboard 9.

This input signal is input to the control means 75, and
As in the case of FIG. 7 described above, the control means 75 accepts this as the amount of deviation of the sliding formwork 10, and the penetration depth of the penetration rod 2 matches the target depth when viewed from the upper limit of the sliding formwork 10. A control signal is sent to the sliding form moving mechanism 12 so that the speed (or position) of the sliding form 10 is controlled in a direction in which the input deviation amount does not occur.
As a result, as in the previous embodiment, the sliding mold is adjusted so that the thickness of the poured concrete in a predetermined hardened state as viewed from the lower limit of the sliding formwork 10 becomes the target value Sn, according to the amount of deviation. The frame 10 is moved at a predetermined speed or to a predetermined position by the sliding formwork moving mechanism 12.

In this way, the acceleration at the time of insertion of the penetration rod 2 is detected, and the penetration resistance is then measured, and it is determined that the hardened state of the poured concrete 11 has sufficient strength to support its own weight. Depth can be measured,
In accordance with the measured depth of the penetration rod 2, the sliding formwork 10 is controlled in the moving direction to reach the target depth, and as a result, the concrete is placed in a predetermined hardened state when viewed from the lower limit of the sliding formwork 10. The sliding formwork 10 can be moved so that the concrete thickness reaches the target value Sn.

In addition, when measuring the penetration depth of the penetration rod 2 into the sliding formwork 10, as shown in FIG. 5, the penetration depth of the penetration rod 2 can be controlled by the vibration time [min], so Select a predetermined excitation time from the characteristic graph corresponding to , store this excitation time in the memory of the CPU 7 as the set excitation time, count the excitation time for the penetration rod 2,
Penetration rod 2 when the excitation time reaches the set excitation time
The sliding formwork 10 may also be controlled by measuring the depth.

Similarly, as shown in FIG. 4, the penetration amount of the penetration rod 2 can be controlled by the number of blows, so a predetermined number of blows is selected from the characteristic graph corresponding to the condition of the poured concrete 11, and the penetration rod insertion device In place of the motor 23 of No. 3, a striking mechanism is placed on the top of the penetration rod 2, and the penetration rod 2 is struck by a set load Pk [Kg], thereby causing the penetration rod 2 to move into the poured concrete 11.
The sliding formwork 10 may be controlled by inserting the penetrating rod 2 into the penetrating rod 2, counting the number of strikes against the penetrating bar 2, and measuring the depth of the penetrating bar 2 when the number of strikes reaches a set number of strikes.

In addition, the load control means 71 in the CPU 7 of each embodiment determines whether the set load Ps is applied to the penetration rod 2 or whether the acceleration has an amplitude value corresponding to the set acceleration.
It functions as a determination means for determining whether Vα has been reached, whether the excitation time T has reached the set time, whether the number of strikes has reached the set number, etc., and these functions are equivalently This is nothing more than determining whether the penetration resistance is at a predetermined value.

As explained above, the loading means in this invention is composed of the penetration rod insertion device 3, the drive circuit 5, and the CPU 7 in the embodiment, and the penetration amount measuring means is composed of the movement amount detector 6, the CPU 7, and the display. Although the device 8 is configured by the device 8, it goes without saying that the configuration is not limited to this.

For example, the penetrating rod insertion device may employ a hydraulic loading mechanism to apply a load to the penetrating rod.
The drive circuit may be hydraulically controlled using a solenoid valve or the like. In addition, if the load control means 71 of the CPU 7 mainly plays the role of determination means, this
This can be realized using a comparator logic circuit, and the penetration depth calculation means can be realized using a counter or the like and a logic circuit.

In addition, in the example, the load etc. are set in accordance with the penetration resistance that has the strength to support its own weight.
It goes without saying that a load or the like can be set for this penetration resistance in relation to a corresponding penetration resistance having a predetermined strength.

Further, in the embodiment, the upper tip of the sliding formwork is used as a reference point, but the reference point for measuring the penetration depth may be taken anywhere. Additionally, the criteria for determining the thickness of poured concrete in its hardened state are as follows:
It is only necessary that the sliding formwork is moved so that the thickness of the poured concrete in a predetermined hardened state becomes the target value when viewed from the lower side of the sliding formwork 10 with reference to a certain position on the lower side of the sliding formwork 10. The method of setting the target position of the formwork can be arbitrarily selected.

〔Effect of the invention〕

A sliding formwork into which concrete is sequentially placed; a penetration rod insertion means for applying a load to a penetration rod and inserting the penetration rod into the poured concrete whose surface portion has not yet hardened; and moving the sliding formwork in a predetermined direction. a sliding formwork moving mechanism, and a control device, the control device comprising:
penetration amount measuring means for measuring the penetration depth at which the insertion resistance of the penetration rod is at a predetermined value with respect to the poured concrete in the sliding formwork; Calculation means for calculating the thickness in the pouring direction within the sliding frame, a set value that determines an appropriate thickness of poured concrete in the same hardening state in the pouring direction within the sliding frame, and the calculated value. means for determining the amount of deviation between the two by comparing them; and controlling the sliding formwork moving mechanism in accordance with this amount of deviation so that the sliding formwork moves in a direction in which this amount of deviation does not occur. Therefore, by measuring the penetration resistance, the position of the poured concrete in a predetermined hardening state can be obtained in the form of the penetration amount of the penetration rod.
By subtracting this amount of penetration from the length of the sliding formwork, it is possible to calculate the thickness (actual measurement value) of the poured concrete in the sliding formwork in the pouring direction in a predetermined hardened state. Then, the preset position of the appropriate sliding form [corresponding to the appropriate thickness (target value) of poured concrete in the same hardening state in the pouring direction within the sliding frame] and the actual measured value are calculated. The amount of deviation between these is obtained by comparing them by calculation or display, etc., and the sliding formwork is moved upward at an appropriate speed or to an appropriate position so as to eliminate this amount of deviation. Can be done.

As a result, it is possible to completely ignore uncertain factors such as outside temperature, accurately grasp the actual strength state, and control the sliding formwork to the appropriate position, allowing efficient concrete placement work. It is possible.

[Brief explanation of drawings]

Figure 1 is a graph showing the development of strength of poured concrete and the characteristics over time.
Figure 2 is a graph showing the strength distribution of poured concrete poured into the sliding formwork, and Figure 3 is a graph showing the insertion state in which a penetrating rod is inserted from above into the poured concrete poured into the sliding formwork. An explanatory diagram explaining
Figure 4 is a graph showing the relationship between penetration depth from the surface of poured concrete and penetration load, and Figure 5 is a graph showing the relationship between penetration depth from the surface of poured concrete and penetration load.
Figure 6 is a graph showing the relationship between the penetration depth from the surface of poured concrete and the vibration time when a load and vibration are applied to the penetration rod. Figure 7 is a graph showing the relationship between the number of hits and the number of hits applied to the bar.
FIG. 8A, which is a block diagram of an embodiment of a control system for sliding formwork to which this invention is applied, shows how concrete is poured by setting the penetration resistance to a load value that has sufficient strength to support its own weight. FIG. 8B is an explanatory diagram showing the display state of the display device as a graph;
FIG. 9 is a block diagram of another embodiment of a sliding formwork control system to which the present invention is applied, and FIG. 10 is a concrete explanatory diagram of an accelerometer in the embodiment of FIG. 9. 1... Device for measuring the strength state of poured concrete,
2... Penetration rod, 3... Penetration rod insertion device, 4... Load state detector, 5... Drive circuit, 6... Displacement amount detector, 7, 70... Processing device (CPU), 8... Display device, 9...Keyboard, 10...Sliding formwork, 11...Pouring concrete, 20...Load loading mechanism, 21...Fixed arm, 71...Load control means, 72...Penetration depth calculation means , 73...
Displacement amount calculation means, 74...Setting value storage means, 75
...control means.

Claims (1)

[Claims] 1. A sliding formwork into which concrete is sequentially poured;
A penetration rod insertion means for applying a load to the penetration rod and inserting the penetration rod into poured concrete whose surface portion has not yet hardened, a sliding formwork moving mechanism for moving the sliding formwork in a predetermined direction, and a control device. The control device includes:
penetration amount measuring means for measuring the penetration depth at which the insertion resistance of the penetration rod is at a predetermined value with respect to the poured concrete in the sliding formwork; Calculation means for calculating the thickness in the pouring direction within the sliding frame, a set value that determines an appropriate thickness of poured concrete in the same hardening state in the pouring direction within the sliding frame, and the calculated value. means for determining the amount of deviation between the two by comparing them; and controlling the sliding formwork moving mechanism in accordance with this amount of deviation so that the sliding formwork moves in a direction in which this amount of deviation does not occur. A control method for a sliding formwork characterized by having a control means. 2. The predetermined load applied by the penetration rod insertion means is greater than or equal to the value at which the penetration rod will not be inserted when the poured concrete is in a hardened state with sufficient strength to support its own weight, and the hardened state is 2. The control method for sliding formwork according to claim 1, wherein the predetermined value is within a range that will not be destroyed, and the predetermined value is given as a fixed range. 3 The penetration amount measuring means includes penetration resistance detection means for detecting the penetration resistance of the penetration rod, determination means for determining whether the penetration resistance of the penetration rod is at a predetermined value, and detection means for detecting the penetration amount of the penetration rod. The sliding formwork according to claim 1, further comprising a penetration amount detection means for measuring the penetration amount of the penetration rod when the insertion resistance of the penetration rod reaches a predetermined value. control method. 4. The predetermined load applied by the penetration rod insertion means is greater than or equal to the value at which the penetration rod will not be inserted when the poured concrete is in a hardened state with sufficient strength to support its own weight, and the hardened state is The penetration resistance detection means detects penetration resistance by detecting the load, and the determination means determines whether the load of the penetration rod is the predetermined set load. Claim 3 is characterized in that it determines whether
Control method for sliding formwork as described in Section.