JPS63265012A - Management device for dynamic consolidation work - Google Patents

Abstract

PURPOSE:To automatically measure the amount of settling of hammer by a method in which the moving amount of hammer is detected, the penetrating amount of the hammer is detected, and the settling amount of the hammer is obtained from the difference between the winding amount and the free dropping amount of the hammer. CONSTITUTION:After a hammer 3 is wound up to a drop height, the winding operation is stopped, and the hammer 3 is freely dropped for the first consolidation. The hammer 3 in the settled down state after the second winding and the second free drop is wound up from the ground. The settling amount H is measured from rotation of a drum 1, and the numerical value of drops is automatically determined. The settling amount of the hammer can thus be measured from the winding amount and free dropping amount of the hammer.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Industrial Application Field The present invention relates to a construction management device for a dynamic consolidation method in which ground is consolidated by dropping a hammer suspended from a rope.

B. Conventional technology The above-mentioned dynamic consolidation method is known as a ground improvement method.

Referring to Fig. 5, which shows the construction situation using a crawler crane, the hammer 3 is suspended by the hoisting rope 2 wound around the hoisting drum 1, the hoisting drum 1 is hoisted, and the hammer 3 is lowered to a predetermined falling height. After hoisting up to H, the hoisting drum 1 is released, and the hammer 3 is allowed to fall freely to the ground at the desired construction site as shown by the broken line due to its own weight. The dynamic consolidation method is a construction method in which the hammer 3 is repeatedly dropped from a certain height, and the impact force of the fall is used to consolidate the ground and improve the ground. The ground is sinking as shown by ΔH.

The extent to which the ground has subsided is important information in understanding the effects of such construction methods. Conventionally, the measurement of the sinkage amount ΔH has been carried out exclusively manually, and has been carried out at an appropriate time, such as after the hammer 3 has been dropped a predetermined number of times. Conventionally, when the hammer 3 is repeatedly hoisted up and dropped, it requires human labor to signal that the hammer 3 has reached a predetermined falling height and to measure the number of falls.

Problems that the C0 invention aims to solve However, since the measurement of the amount of settlement ΔH relies on the hands of a guard, there is the problem that construction costs are high.In addition, when measuring the amount of settlement, construction work must be temporarily suspended. It is necessary for a measurer to measure the amount of settlement ΔH at each construction site. In this case, in order to avoid danger, the crane must be rotated to move hammer 3 to a safe position, and after measurement, hammer 2 must be returned to the original construction location. 1. Improvements in work efficiency are desired. .

The purpose of the present invention is to eliminate the need for human labor to measure the amount of subsidence, and
An object of the present invention is to provide a construction management device for a dynamic consolidation method that can perform measurements without interruption even during construction.

Means for Solving the D0 Problem To be explained with reference to the claim correspondence diagram in FIG. 1, the present invention has the following:
This is a construction management device for a dynamic consolidation method in which a hammer 101 suspended by a winch 100 is allowed to fall freely to sink and consolidate the ground, and the movement amount detection means 102 detects the amount of hoisting and the amount of free fall of the hammer 101, respectively. and hammer 1
The ground break detecting means 103 detects the ground break of 01, and the hammer 101 detects the difference between the hoisting amount and free fall amount of the hammer 101 detected by the movement amount detecting means 102 between the ground breaking detection and the next ground breaking detection. 101.

The winch 100 removes the hammer 101 that has landed on the E5 action construction site.
When the hammer 101 is wound up, the ground break detection means 103 detects the ground break, and the subsequent winding amount of the hammer 101 is detected by the movement amount detection means 102. When the hammer 101 is hoisted up to a predetermined height and allowed to fall freely, the amount of free fall of the hammer 101 is detected by the movement amount detection means 102. Next, when the winch 100 is used to cut and hoist the hammer 101.

As described above, the sinking amount is measured based on the previously detected hammer winding amount and free fall amount.

F. Embodiment An embodiment of construction using the crawler crane shown in FIG. 5 will be explained based on FIGS. 2 to 4.

In FIG. 2, the hoisting drum 1 of this crawler crane is rotated by receiving rotational force from a hydraulic motor 13 which is driven by operating a hoisting operation lever 12 in a driver's seat 11. As is well known, radiation fins 18 are protruded at a predetermined pitch from the outer peripheral edge of the winding drum 1, and the radiation fins 1a.

A proximity switch 14 is provided oppositely, and a pulse signal is obtained from the proximity switch 14 as the hoisting drum 1 rotates. In addition, a pressure switch 17 is provided in the conduit 16 on the inlet side of the hoisting hydraulic motor 13, and the pressure switch 17 is always closed with the pressure necessary to hoist the hammer 3, and a hoisting operation lever 12 is operated on the driver's seat 11. A microswitch 18 is also provided which closes when the switch is activated. Further, the driver's seat 11 is also provided with an automatic return type manual switch 19 that initializes a hammer fall count counter. In addition, 24 is a hydraulic pump, ・2
Reference numeral 5 indicates a hydraulic directional switching valve that is switched by the operating lever 12.

Figure 3 shows the control circuit.

The proximity switch 14 is a microcomputer unit 21
The pressure switch 17° microswitch 189 is connected to the interrupt input terminal of the microcomputer unit 21, and the manual switch 19 is connected to the contact input terminal of the microcomputer unit 21.

Printer 22. The buzzer 23 is connected to the output terminal of the microcomputer unit 21. This microcomputer unit 21 executes various calculations according to a processing program to be described later, and supplies signals to a subsequent printer 22 and a buzzer 23.

Next, while referring to the processing steps in FIGS. 4(a) and (b),
The operation of this embodiment will be explained in comparison with an actual construction procedure.

(1) Land the hammer 3 on the reference surface of the desired construction location. Now, when a reset signal is input to the microcomputer unit 21, the process shown in FIG. 4(a) is started.

First, in step S1, interrupts are permitted. From now on, if the hoisting drum 1 rotates and a pulse accompanying the rotation of the hoisting drum 1 is input from the proximity switch 14 to the interrupt input terminal of the microcomputer unit 21, the
Proceed to b) interrupt processing.

This interrupt processing includes step S12 of determining whether the microswitch 18 is closed or not, and step S13 of increasing a count value indicating the head when the determination result is affirmative.
Step S14 of reducing it in the case of a negative determination result
If the microswitch 18 is closed, one winding is being completed, so the lift count value is increased; otherwise, it is decreased, and the process returns to the process shown in FIG. 4(a).

With the hammer 3 landing on the ground serving as a reference surface, the manual switch 19 is pressed. In step S2.

The state of this manual switch 19 is determined, and if it is determined that it is closed, a counter for the number of falls of the hammer 3 is reset in step S3, and the process proceeds to step S4, step S2
If it is determined that the manual switch 19 is open, step S4
Proceed to. In this way, the driver must use the hammer 3 at the start of construction.
With the robot landing on the reference surface, press the manual switch 19 to initialize the fall counter.

In step S4, the state of the pressure switch 17 is determined.

When the pressure switch 17 is open, it indicates that the pressure in the inlet pipe line 16 of the hydraulic motor 13 is low, and the hammer 3 is falling or landing on the ground. When the pressure switch 17 is closed, this indicates that the pressure in the inlet pipe line 16 of the hydraulic motor 13 is high, and the hammer 3 is being hoisted up. In the former case, the process proceeds to step S10, and in the latter case, the process proceeds to step S5.

(2) The driver operates the hoisting operation lever 12 to rotate the hoisting drum 1 in the hoisting direction and hoist the hammer 3 off the reference surface. Pressure switch 17 is activated by the start of winding.
is closed, step S4 is affirmed, and step S
Proceed to step 5 and check the fall count value here. If the count value of the number of falls is zero, it is a ground cut from the reference plane, so the process goes to step S6, and if it is 1 or more, it is a ground cut from the sinking surface, so the process goes to step S7.

This is the first ground cutting, and as mentioned above, the hammer fall count counter was initially cleared in step S3, so
This step S proceeds from step S5 to step S6.
At step 6, the lift count value is reset to 1, and the ground cutting flag is set to 1. Thereby, the lift count value can be automatically reset to zero at the time of ground cutting.

After the start of winding, pulses are output from the proximity switch 14 as the winding drum 1 rotates.

During this winding process, step S13 in FIG. 4(b) is executed, and the lift count value increases as the hammer 3 winds up.

(3) Then, the hammer 3 is hoisted up to the falling height. Step 3 determines whether the hammer 3 has reached the predetermined falling height.
At step 10, a determination is made based on whether the hoisting gallery count value has reached a predetermined value. In a state where the hoisting is in progress and the predetermined drop height is not reached, the determination result in step SIO is negative and the process returns to step S2. However, when the lift count value reaches a predetermined value indicating the predetermined drop height or more, the determination result is affirmative. Therefore, at this point, the process advances to step Sll. In step Sll, the buzzer 23 is sounded to notify that a predetermined fall height has been reached, and the fall count counter is incremented by +1.
The ground cutting flag is reset to zero to make it ready for the next ground cutting. In this way, the driver can easily know from the sound of the buzzer 15 that the hammer 3 has reached a predetermined falling height. The number of falls is also automatically counted.

(4) After the hammer 3 reaches a predetermined falling height.

The operator stops the hoisting operation and allows the hammer 3 to fall freely in order to perform the first consolidation. The free fall of the hammer 3 causes the hoisting rope 2 to be let out from the hoisting drum 1, so that the hoisting drum 1 rotates in the opposite direction to that during hoisting.

As this rotation occurs, a pulse is inputted to the microcomputer unit 21 from the proximity switch 14, but in this case, since the microswitch 18 is open, step S14 is executed in the interrupt processing of FIG. 4(b). Ru. Therefore, as the hammer 3 falls, the lift count value that has been incremented as described above is subtracted.

(5) Then, in the second hammer winding, the hammer 3, which has sunk due to free fall, is lifted up from its sunken state.

With the start of this second winding, the pressure switch 17 is turned on again.
is closed and the number of falls count value is 1, so step S2. Step 84. Step 85. Step 37. Step S8. Step S9 is executed. Only when the ground cutting flag is zero and the lifting height counter value is negative, it is determined that the ground cutting has occurred from the hammer sinking state, and the process proceeds to step S9, where the absolute value of the lifting height counter value at this time is set as the sinking amount ΔH.
shall be. Then, this sinking amount ΔH is output to the printer 22 together with the count value of the number of falls.

Repeat the above steps to determine the amount of subsidence ΔH for each fall.
Automatically measure. In addition, in this step S9, the ground breaking flag is set to 1, and it is stored that the ground breaking has been determined.

(6) The subsequent steps are the same as described above, and all that is required is to hoist the hammer 3 to a predetermined fall height and allow the hammer 3 to fall freely.
Repeat steps (3) to (5) above up to a predetermined number of times.

In this way, in this embodiment, the amount of settlement ΔH can be measured by the rotation of the hoisting drum 1, and can be measured even during construction without interrupting the work.

In addition, since the determination of the hammer tail cut from the reference surface and the determination of the hammer tail cut from the subsidence state are made under the same load conditions (the opening/closing pressure settings of the pressure switch 17 are the same), there is an error in the measurement of the amount of settlement. can be minimized.

Furthermore, since the buzzer 23 warns that the hammer 3 has reached a predetermined falling height, it is possible to accurately know that the predetermined height has been reached without a signal from the operator. Furthermore,
The number of falls is automatically measured when the hammer 3 reaches a predetermined fall height.

The measurement of the number of falls is also automated.

In the above embodiment, the first hoisting operation is detected by the microswitch 18, but in the case of a circuit that converts the operation of the hoisting operation lever 12 into pilot oil pressure to control the drive of the hydraulic motor 13, the hoisting side The operation may be performed by detecting the pilot oil pressure using a pressure switch. Although the rotation of the first hoisting drum is detected by the proximity switch 14, other well-known techniques such as an optical sensor such as a photoelectric switch or detection of the rotation of the drum shaft by a rotary encoder can be used. In particular, when using a rotary encoder, the rotational direction of the drum can also be detected, so detection of hoisting operations (detection of hoisting or free fall)
is also no longer necessary. Furthermore, the lifting height may be detected from the amount of movement of the hoisting rope. Furthermore, the ground breaking may be detected not by the hoisting oil pressure but by the line pull of one hoisting rope. Further, the hoisting drum may be driven by a drive system other than the hydraulic type. Furthermore, in the above embodiment, the up-down counter directly detects the difference between the hammer winding amount and the hammer free fall amount to calculate the sinking amount, but separate counters detect the winding amount and the free fall amount, respectively. You may also use a subtracter to calculate the difference between the two.

G0 Effects of the Invention According to the present invention, the amount of settlement caused by a hammer can be measured based on the amount of winding up of the hammer and the amount of free fall, and there is no need for manpower for measurement, and measurement can be performed during construction. This method allows the measurer to quickly determine the amount of settlement without having to take the trouble of measuring the amount of settlement at the construction site, and also improves work efficiency as there is no need to move the hammer or return it to the original position during construction. Significantly improved.

[Brief explanation of drawings]

FIG. 1 is a diagram corresponding to claims of the present invention. Figures 2 to 4 show one embodiment, Figure 2 is a diagram showing the overall configuration, Figure 3 is a block diagram showing its control system, and Figures 4 (a) and (b) are processing procedure examples. FIG. 5 is an explanatory diagram of the construction status of the dynamic consolidation method. 100: Winch 101: Hammer 102: Movement amount detection means 103: Ground cutting detection means 104: Settlement amount calculation means

Claims (1)

[Claims] 1) In a construction management device for a dynamic consolidation method in which a hammer suspended by a winch is allowed to fall freely to cause the ground to sink and consolidate, the amount of movement for detecting the amount of hoisting and the amount of free fall of the hammer, respectively. a detecting means, a ground breaking detecting means for detecting a ground breaking of the hammer, and a hoisting amount and a free fall amount of the hammer detected by the movement amount detecting means from one ground breaking detection to the next ground breaking detection; 1. A construction management device for a dynamic consolidation method, comprising a settlement amount calculation means for detecting the settlement amount of a hammer based on a difference. 2) A construction management device for a dynamic consolidation method according to claim 1, characterized in that a warning sound is emitted when the movement amount detecting means during hoisting reaches a predetermined value or more. 3) In the apparatus according to claim 2, the dynamic consolidation method is characterized in that the falling rotation of the hammer is detected in response to the movement amount detection means at the time of hoisting reaching a predetermined value or more. construction management device. 4) A construction management device for a dynamic consolidation method according to claim 1, characterized in that the amount of settlement is visualized and displayed.