JPH10239141A - Device and method for metering material for construction and ground improvement method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the working efficiency and the metering accuracy by reading a measurement result that is obtained by a weight-measuring means for also measuring the change in a load that is generated owing to vibration in time series, filtering out a noise with an filtering means, and metering a material for contraction based on the measurement result from which the noise is removed. SOLUTION: A dynamic distortion amplifier 25 transducer the potential of load cells 22a, 22b, and 22c into an electrical signal and outputs it. The dynamic distortion amplifier 25 has a noise filtering circuit 25r for filtering out a noise due to vibration. The noise filtering circuit 25r filters out an AC component by passing an electrical signal for indicating the amount of displacement of load cells 22a, 22b, and 22c through an analog filter and at the same time, performs a running average processing through a running averaging circuit. More specifically, a nearly constant electrical signal can be outputted through the noise filtering circuit 25r even if the load of a target to be metered changes and a noise is superposed on the amount of displacement of the load cells 22a-22c, thus resulting in a nearly equal value as an electrical signal that is outputted when the target is measured statically.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a civil engineering material measuring device and a civil engineering material measuring method for measuring civil engineering materials used in the civil engineering work, and a ground using the measuring device and the quantitative measuring method. It relates to improved construction methods.

[0002]

2. Description of the Related Art Civil works include, for example, ground improvement works for countermeasures against liquefaction and for increasing the supporting force of soft ground. FIG. 8 shows a diagram for explaining an example of a conventional general ground improvement method. FIG. 1A is a schematic view of an apparatus for implementing the above ground improvement method, and FIG. 2B is a schematic diagram for explaining a method of measuring civil engineering materials (supplementary materials) during pile post driving. In the figure, P1 is a casing, P2 is a crawler type sand pile driving machine, P3 is a vibro hammer, P4 is a skip bucket, P5 is a sand surface gauge, and P6 is a tractor shovel. An opening / closing lid P1 is provided at the tip of the casing P1.
a is provided.

In a general ground improvement method, first, a casing P1 is driven into the ground with a vibratory hammer P3, and a replenishing material (for example, sand or the like) is inserted into the casing P1 during or after driving the casing P1. Gravel). The supply of the supply material is performed by carrying the supply material into the skip bucket P4 by the tractor shovel P6 and then lifting the skip bucket P4 to the input port of the casing P1.

After the casing P1 is driven to a predetermined depth in the ground, the casing P1 is pulled up by a crawler type sand pile driving machine, so that the casing P1 is driven.
The opening / closing lid P1a at the tip of the casing P1 is opened, and a supplement is supplied into the ground from the tip of the casing P1. After the casing P1 is pulled up by a predetermined amount, the casing P1 is driven back into the ground again by operating the vibratory hammer P3, and the replenishing material supplied into the ground is compacted. In some cases, by gradually pulling up the casing P1 while operating the vibratory hammer P3, replenishment of the supply material into the ground and compaction of the supply material may be performed almost simultaneously.

In the process of raising the casing P1, the replenishing material in the casing P1 is supplied to the ground and compacted in the ground, and the replenishing material in the casing P1 decreases accordingly. When the supply material in the casing P1 decreases, the supply material is again supplied to the casing P1 in the same manner as described above.
Put in. Then, by repeatedly raising and driving back the casing P1 and feeding the supplementary material into the casing P1, the pile pillar of the compacted supplementary material is driven into the ground.

[0006] In the above-mentioned ground improvement work, in order to control the process and to control the quality of the pile columns to be cast, it is an essential requirement to measure the amount of replenishing material as civil engineering material to be put into the casing P1.

Conventionally, the measurement of the replenishing material as the civil engineering material has been performed by using a sand surface gauge P5. That is, as shown in FIG. 8B, the sand surface gauge P5 is inserted into the casing P1, and the supplied replenishing material is in the casing P1.
By measuring up to which position, the supplied supply material is measured.

[0008]

However, the measurement using the sand surface gauge P5 as described above has several problems as follows.

That is, when the supply material is measured using the sand surface gauge P5, the sand surface gauge P5 is inserted from the upper part of the casing P1, and is gradually lowered to detect the sand surface. A complicated process, such as raising the sand surface gauge P5, is required. Further, during this time, the sand surface gauge P5 is not buried in the replenishing material, so the supply of the replenishing material must be temporarily interrupted. The work efficiency has been reduced.

In addition, in the measurement using the sand surface gauge P5, there is a problem that it is difficult to accurately control the supply amount of the supply material. That is, in the sand surface gauge P5, the supply amount is measured after the supply material is supplied, and the supplied amount cannot be recognized before the supply material is supplied. There is no other way than to put the amount close to the predetermined amount at the approximate level and then check the amount after the introduction.

In recent years, the present applicant has penetrated the ground with a hollow casing having a plurality of through-holes communicating from the outside of the casing to the inside of the casing, and supplied a supplementary material for improving the ground from the ground to the periphery of the casing. At the same time, a part of the replenishing material is caused to flow into the inside of the casing through a through hole provided in the casing, and the replenishing material is supplied into the ground from the front end of the casing while the casing is being pulled out. A ground improvement method was newly developed in which the replenishing material replenished in the ground was beaten back or vibrated to compact the replenishing material, and a pile pillar of the replenishing material compacted in the ground was driven.

According to the ground improvement method, the replenishing material flows into the casing through the through hole provided in the casing, so that the replenishing material can be smoothly supplied to the ground even in a relatively thick casing. At the same time, an effect is obtained that the operation of charging the supply material into the casing can always be performed on the ground surface. That is, in the conventional casing P1, it was necessary to lift the supply material to the high inlet by the skip bucket P4, but in the ground improvement method, this was not necessary, and the supply material was always kept inside the casing on the ground surface. Can be put in.

[0013] By the way, in the ground improvement method (ground improvement method using a casing having a through-hole), the measurement of the supply material as civil engineering material is an essential requirement from the viewpoint of process control and quality control. is there. However,
In the ground improvement method, if the sand surface gauge P5 is used for the measurement, the supply material charged around the casing gradually flows into the casing.
However, there was a problem that it was buried in the replenishing material and could not be weighed well.

As described above, as an example of civil engineering work, ground improvement work has been taken as an example, and the problem relating to the measurement of replenishing materials performed in the ground improvement work has been described. In general, civil engineering work is used for the civil engineering work. When weighing civil engineering materials, large noise is placed due to vibrations caused by civil engineering work, so that weighing is not performed by load measurement, but by volume measurement.

However, in order to measure civil engineering materials by volume, the workability is extremely high, for example, by laying civil engineering materials on a bucket or hopper having a predetermined volume and leveling the surface to measure the predetermined volume. In addition, since the volume of civil engineering materials, such as the above-mentioned replenishing materials, may change depending on the compaction degree, there has been a problem that the accuracy of measurement is correspondingly lacking.

The present invention has been made to solve the above problems, and provides a weighing apparatus and a weighing method that can perform accurate weighing with good workability when weighing civil engineering materials in civil engineering work. In addition, in the ground improvement method, improve the measuring process of civil engineering materials, improve the work efficiency of the entire ground improvement work, and improve the reliability of process management and quality control in the ground improvement work .

[0017]

Means for Solving the Problems In order to solve the above-mentioned problems, an invention according to claim 1 is a civil engineering material measuring device for measuring civil engineering materials used in civil engineering work. A weight measuring means for measuring the weight of the timber, together with a change in load caused by vibrations caused by civil engineering work, and a measurement result obtained by the weight measuring means taken in time series, and a noise accompanying the vibration is obtained from the time series of the measurement results. And a noise elimination unit for elimination of noise, and weighs the civil engineering material based on the measurement result from which the noise has been eliminated by the noise elimination unit.

According to the first aspect of the present invention, since the civil engineering material is measured by measuring the weight, the work of measuring the civil engineering material is performed in comparison with the conventional method of measuring and measuring the volume. The performance is improved. That is, when measuring the volume, for example, after putting civil engineering materials in a vessel having a predetermined volume,
In contrast to performing weighing by smoothing the surface or the like, the weighing device of the present invention does not require complicated work, and an arbitrary amount of civil engineering material is placed on, for example, a weight measuring means to measure the weight. Weighing is possible only by measuring.

Furthermore, since the volume of civil engineering materials varies depending on the compaction degree, the conventional volume measurement lacks the precision of measurement unless the compaction degree of the civil engineering material is taken into account. According to the method, the measurement is performed from the weight, so that accurate measurement can be always performed. In general, civil engineering involves vibration, but even when weighing in the range of vibration, the weight measuring means measures the weight of the civil engineering material together with the change in load due to vibration, and the noise removing means measures the vibration. Since the noise of the accompanying measurement result is removed, the influence of vibration can be removed and accurate measurement can be performed.

Here, the civil engineering material used in the civil engineering work is, for example, a replenishing material (sand, gravel, crushed stone, slag, cement-based solidified material) supplied to the ground to improve the ground in the ground improvement work. Materials, polymer-based solidifying materials, etc.), but are not limited thereto, and include various materials used in civil engineering work. The weight measuring means is composed of, for example, a load cell having a wide measuring range capable of measuring civil engineering materials including an increase in load due to vibration. The noise removing unit, for example, takes in an electric signal indicating the measurement result of the weight measuring unit in time series,
Various known noise-removing devices, such as a low-pass filter that removes an AC component (from low frequency to high-frequency component) from the time series of the electric signal and a moving average unit that performs a moving average process on the time series of the signal, Configurable by technology. Furthermore, when measuring the volume of the civil engineering material as the final measurement value, for example, the weight per unit volume of the civil engineering material is measured in advance, and the volume value of the civil engineering material is determined from the measurement result of the weight by the measuring device. Calculate.

According to a second aspect of the present invention, there is provided the civil engineering material measuring apparatus according to the first aspect, wherein the measurement of the known weight is performed substantially simultaneously with the measurement of the civil engineering material under substantially the same vibration as the civil engineering material. Weight measuring means, an auxiliary noise removing means for performing the same noise removal as the noise removing means from the measurement result by the auxiliary weight measuring means, a known weight measurement result from which noise has been removed by the auxiliary noise removing means, And a correcting means for correcting the measurement result of the civil engineering material based on the difference from the original value of the known weight.

According to the second aspect of the present invention, a known weight is measured by the auxiliary weight measuring means and the auxiliary noise removing means under the same conditions as those for measuring the weight of civil engineering material, and the measured value is compared with the original weight. Based on the difference from the weight, the measurement result of the civil engineering material (measurement result after noise removal) is corrected, so that the accuracy of the measurement of the civil engineering material is further improved.

Here, the content of the correction by the correction means is, for example, (measured value of civil engineering material after correction) = [(original value of known weight) / (measured value of known weight)] × ( Correction as (measured value of civil engineering material before correction) or (measured value of civil engineering material after correction) = (measured value of civil engineering material before correction) +
Correction of [(measured value of known weight)-(original value of known weight)], correction combining weights of the above two types of corrections, and correction formulas obtained by experiments and correction There can be various corrections, such as corrections based on equations. As an example of an experiment for obtaining a correction formula, a standard predetermined measurement amount (actually measured amount) is weighed by various types of vibrations by a civil engineering material weighing device, and a known weight is compared with a measured value. An experiment may be performed to determine how much the predetermined measurement amount deviates from the original value depending on the value of the difference. Note that the correction contents of the correction means are not limited to the above specific examples.

According to a third aspect of the present invention, there is provided a civil engineering material measuring method for measuring a civil engineering material used in the civil engineering work, wherein the weight of the civil engineering material is reduced by a load generated by vibration accompanying the civil engineering work. A measurement process for measuring the change is also performed, and a noise removal process for removing the noise accompanying the vibration from the time series of the measurement results by taking in the measurement results obtained by the measurement process in a time series is performed. The method for weighing the civil engineering material based on the measurement result from which noise has been removed by the processing is adopted.

According to the third aspect of the invention, the same functions and effects as those of the first aspect of the invention can be obtained.

According to a fourth aspect of the present invention, there is provided the method for measuring civil engineering materials according to the third aspect, wherein the measurement of the known weight is performed substantially simultaneously with the measurement of the civil engineering materials in a state where substantially the same vibration as that of the civil engineering materials is applied. A measurement process, an auxiliary noise removal process for removing noise similar to the noise removal process from the measurement result obtained by the auxiliary measurement process, and a known weight measurement result from which noise has been removed by the auxiliary noise removal process. And a correction process for correcting the measurement result of the civil engineering material based on the difference between the known weight and the original value.

According to the fourth aspect of the invention, the same operation and effect as those of the second aspect of the invention can be obtained.

According to a fifth aspect of the present invention, there is provided a process of penetrating a casing into the ground, supplying replenishing material for improving the ground introduced into the casing into the ground while extracting the casing, and extracting the casing. In the ground improvement method of compacting the replenishing material replenished in the ground by driving back or vibrating the casing in the ground and driving a pile pillar of the replenishing material compacted in the ground, one time of the replenishing material is used. Was measured using the civil engineering material measuring device according to claim 1, and thereafter, the construction material was charged into the casing.

According to the fifth aspect of the present invention, the supplementary material to be charged into the casing is measured by using the above-mentioned civil engineering material measuring device and measuring the weight of the supplementary material. Compared with the used weighing, the workability and the accuracy of the weighing are improved, and the working efficiency and the quality of the whole ground improvement work can be improved.

For example, in the conventional ground improvement method using a sand surface gauge, while the measurement with the sand surface gauge was not performed, it was not possible to supply the replenishing material to the casing, resulting in a decrease in work efficiency. In the ground improvement method of the present invention, the measurement of the supply material and the supply of the supply material can be performed continuously, and during the measurement by the civil engineering material measuring device, the casing is pulled out and driven back (including vibration) in parallel. Can be done. That is, it is possible to continuously perform pulling out and punching back from the penetration of the casing into the ground, and the working efficiency is dramatically improved.

Further, in the method using the sand surface gauge, since the amount of the supply material is measured after the supply material is supplied, there is a problem that it is difficult to accurately control the supply amount of the supply material. According to the construction method of the present invention, since the replenishing material is measured before it is charged into the casing, it is possible to accurately measure and control the amount of the replenishing material charged. Therefore,
The quality of the ground improvement work can be improved.

Here, the ground improvement method for improving the ground includes, for example, cohesive soil deposited on an alluvial plain, marine clay existing on a soft seabed, artificial landfills formed on the ground, and decay of swamps. Increased bearing capacity in cohesive soil based soft soils including special soils such as soil and loam, stability during loading and excavation, application to settlement measures, loose sandy ground, volcanic ash
It is intended to increase the bearing capacity, countermeasures against settlement, measures against water blocking, and measures against liquefaction in sandy soil based soft ground including special soil such as whitebait, and is used as a supply material to be supplied into the ground to improve the ground. Include, for example, sand, gravel, crushed stone, slag, cement-based solidification material, polymer-based solidification material, and the like. The supply of the supply material is performed while the casing is penetrating the ground, after the casing has penetrated to a predetermined depth, while the casing is being pulled out, or while the casing is being driven back, and the like. Is not limited.

According to a sixth aspect of the present invention, a hollow casing having a plurality of through-holes extending from the outside of the casing to the inside of the casing is penetrated into the ground, and a supply material for improving the ground is supplied from the ground to the periphery of the casing. And at the same time, a part of the replenishing material is caused to flow into the inside of the casing through a through hole provided in the casing, and the replenishing material is replenished into the ground from the tip of the casing while the casing is being pulled out,
In the process of pulling out the casing, the casing is beaten back or vibrated to compact the replenishing material supplied to the ground,
In the ground improvement method of driving a pile of the supplementary material compacted in the ground, the input amount of the supplementary material for one time is measured using the civil engineering material measuring device according to claim 1, and thereafter, The construction method was such that a replenishing material was charged into the casing.

According to the sixth aspect of the present invention, the replenishing material can be smoothly supplied to the ground even if the casing is relatively thick, and the operation of charging the replenishing material into the casing always requires the ground. According to the present invention, in the ground improvement method having an effect of being able to be performed on the surface, in the conventional measuring method using the sand surface gauge, the sand surface gauge was buried in the replenishing material and could not be measured properly. The replenishment material can be measured without any problem, and, similarly to the ground improvement method according to claim 5, the workability of the measurement process and the accuracy of the measurement are improved, and the work efficiency of the entire ground improvement work is extended. And the quality can be improved.

A specific example of the supply material and a specific example of the supply timing of the supply material are the same as those described in the section of the ground improvement method according to claim 5.

[0036]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A civil engineering material measuring device, a civil engineering material measuring method, and a ground improvement method according to an embodiment of the present invention will be described below with reference to the drawings of FIGS.

[First Embodiment] FIG. 1 is a schematic view of a ground improvement apparatus 10 for implementing a ground improvement method according to the present invention, and FIG. 2 is a view of a hopper 6 and a supply device 8 in FIG. (A) is a side view, (b) is a top view,
(C) is a side view of the state in which the supply device 8 is operated), FIG.
2 shows a configuration diagram of the entire system of the civil engineering material weighing device 20.

The ground improvement apparatus 10 is an example of an apparatus for implementing the ground improvement method according to the present invention, and includes a crawler type sand pile driving machine 1, a tractor shovel 2, a casing 3 driven into the ground, and a casing. 3 includes a vibratory hammer 5, a hopper 6, a loading plate 7 acting on compaction near the ground surface, a supply device 8, a civil engineering material measuring device 20 (FIG. 2), and the like.

The casing 3 is a hollow body having through holes 3a, 3a,... Communicating from the outside of the casing to the inside of the casing, and a water absorbing mechanism 4 for absorbing excess pore water in the ground and an opening / closing lid 3b are provided at the tip. Is provided. The distal end of the casing 3 is configured to be larger than the diameter of the casing 3, and when the casing 3 is driven into the ground, a space is formed around the casing 3 in the ground.

The hopper 6 temporarily stores the replenishing material (eg, sand or gravel) supplied by the supply device 8 until it flows into the ground via the inside or around the casing 3. As shown in FIG. 2, the supply material is received and stored from the upper opening, and the supply material is sent out from the lower opening to the inside of the casing 3 or to the periphery of the casing 3. The casing 3 is passed through the upper and lower openings of the hopper 6 and is driven into the ground. The hopper 6 is provided with a limit switch 23 (FIG. 3) for detecting whether or not the storage amount of the supply material has reached a limit. The limit switch 23 detects the supply of the supply material even when the supply material is supplied from the supply device 8.

The supply device 8 comprises a bucket 8a for storing and discharging the supply material, and a cylinder 8b for tilting the bucket 8a. FIG. 2 (c) shows a state where the supply material is loaded in the bucket 8a. As shown in FIG.
Is operated to incline the bucket 8a so that the supply material in the bucket 8a is supplied into the hopper 6.

As shown in FIG. 3, the civil engineering material measuring device 20 is provided in a base 21, first to third load cells 22a to 22c as weight measuring means, a dynamic strain amplifier 25, and the bucket 8b. And a limit switch 23, a measuring board 24, a pen recorder 26, an operation box 27, and the like. The weight of the civil engineering material (for example, replenishing material) loaded on the bucket 8a of the supply device 8 is measured, and the civil engineering material is calculated from the weight. Weighing.

The portion (the load cells 22a to 22c and the base 21) of the civil engineering material measuring device 20 for performing weight measurement is integrally formed with the supply device 8. Specifically, the bucket cylinder 8 b of the supply device 8 is mounted on the base 21 of the measuring device 20.
The bucket 8a is attached to the base 21 via load cells 22a to 22c. With this configuration, it is possible to continuously and smoothly perform the measurement from the supply of the supply material, and the work efficiency of the ground improvement work is further improved.

The load cells 22a, 22b, and 22c are provided in a state of supporting the bucket 8a of the supply device 8, and generate displacement by a load applied to the bucket 8a. That is, it constitutes weight measuring means for measuring the load applied to the bucket 8a.

These load cells 22a, 22b, 22c
A large rated load is used so that the load of a heavy replenishing material can be measured together with the load increased by the vibration. Note that the load cells 22a, 2
As for 2b and 22c, it is desirable to use one in which the output signal changes linearly with respect to the applied load. However, if the non-linear component cannot be ignored, the output signal is corrected to be linear. May be. This correction processing can be easily configured by known signal processing. Further, by providing a structural seismic isolation mechanism between the base 21 of the weighing device 20 and the ground, the rated loads of the load cells 22a, 22b, and 22c can be made relatively small.

The dynamic distortion amplifier 25 includes the load cell 22
The displacements a, 22b and 22c are converted into electric signals and output. The dynamic distortion amplifier 25 is provided with a noise removing circuit 25r for removing noise due to vibration. The noise removing circuit 25r is composed of an analog filter and a moving average circuit, and includes the load cells 22a,
An electric signal indicating the displacement amount of each of 22b and 22c is passed through an analog filter to remove an AC component (for example, from a low frequency to a high frequency component of 1 Hz), and is passed through a moving average circuit to perform a moving average process (for example, moving at 2 second intervals) Average).

That is, even if the load on the object to be measured changes due to the vibration of the civil engineering work and noise is placed on the displacement of the load cells 22a to 22c, the electric signal indicating the displacement is transmitted to the noise removing circuit 25r. The passage removes noise, and the dynamic distortion amplifier 25 outputs substantially constant electric signals (first to third load cell output signals). The first to third load cell output signals have substantially the same value as the electric signal output when the object is measured at rest.

The operation box 27 includes an all reset button 27A, a penetration end button 27B, a weighing button 27
D, a tare correction button 27E, a weighing confirmation lamp 27b, a weighing completion lamp 27d, and a tare completion lamp 27e are provided, and the weighing device 20 is controlled by operating these buttons. The operation contents of these buttons will be described in detail in the description of the weighing method.
The operation box 27 is usually provided in an operation room together with the pen recorder 26.

Based on the operation of the operation box 27, the measuring board 24 measures the supply material loaded on the bucket 8a, measures the integrated soil amount of the supply material supplied to the ground, the remaining soil of the supply material inside or around the casing 3. Calculation of quantity, pen recorder 26
The control of the civil engineering material weighing device 20 is performed, such as transmission of data to be recorded in the device. The details will be described in the description of the weighing method, but the weighing and the accumulated soil amount of the supplement material are converted from weight to volume based on the unit volume weight of the supplement material measured in advance. . On the measuring board 24,
Dynamic distortion amplifier 25 (load cells 22a, 22b, 22
c), operation box 27, ammeter 5 of vibro hammer 5
a, a depth gauge 3d for measuring the depth of the casing 3, a pen recorder 26 and the like are connected.

If the noise removal processing performed by the noise removal circuit 25r of the dynamic distortion amplifier 25 does not sufficiently remove the noise and the measurement accuracy is not high, the measuring board 24
An additional filter circuit may be provided to remove the AC component of the load cell output signal output from the dynamic distortion amplifier 25.

Next, the earth and sand improvement device 1 having the above-described configuration
The ground improvement method according to the present invention (including the method for measuring civil engineering materials according to the present invention), which is carried out using 0, will be described.

4 (a) to 4 (e) are schematic diagrams showing a series of outline steps of the ground improvement work, and FIG. 5 is a procedure of a replenishing material measuring method performed in the ground improvement work. FIG.

First, before the ground improvement work starts, zero adjustment and span adjustment of the civil engineering material measuring device 20 are performed in a state where the loading plate 7 is stabilized. Zero adjustment is an adjustment to make the measured value show "0" in a state where no load is applied to the weighing device 20, and span adjustment is to adjust the increase / decrease ratio of the measured value to the increase / decrease amount of the load. After performing the zero adjustment, a predetermined load (for example, 1 ton) is given, and the measurement is adjusted so that the measured value matches the weight of the predetermined load.

Further, before the ground improvement work starts, the weight per unit volume of the supplement material to be lightened is measured. This measurement is performed by filling the bucket 8a with the replenishing material, scouring the surface, and then measuring the replenishing material in the bucket 8a. The capacity of the bucket 8a is stored in advance in the civil engineering material weighing device 20, and by turning on an earth / sand specific gravity switch (not shown), the weight of the replenishing material filled in the bucket 8a is measured and the measured value is measured. Is divided by the capacity, and the value is stored and set in the weighing board 24 as the unit weight of the supply material.

After the above settings are made, ground improvement work is started. That is, while operating the vibro-hammer 5, the crawler-type sandpile driving machine 1 penetrates the casing 3 into the ground (FIGS. 4A and 4B).

While the casing 3 is penetrating, the measuring step of measuring the supply material by the civil engineering material measuring device 20 and the supply step of putting the measured supply material into the hopper 6 are repeatedly performed.

The measurement of the replenishing material is performed by a series of processes shown in FIGS. That is, first, before the replenishing material is supplied to the bucket 8a of the supply device 8, the tare button 27E of the operation box 27 is turned on to perform tare correction (FIG. 5).

When the tare button 27E is turned ON, this ON signal is input to the weighing panel 24, and based on the ON signal, the load cell output signal output from the dynamic distortion amplifier 25 is read into the weighing panel 24, and the load cell is read. The weighing value corresponding to the output signal is corrected to “0”. By this tare correction, even when replenishing material remains in the bucket 8a at the time of supplying the replenishing material last time, it is possible to perform measurement by subtracting the remaining amount, so that the total replenishing material to be replenished into the ground can be obtained. Is accurately measured.

When the tare correction is completed by the measuring board 24,
An operation signal is output from the weighing board 24 to the patrol light, and the patrol light for permitting the supply of the supply material into the bucket 8a is turned on. After the completion of the tare correction, the lighting of the patrol light is confirmed, and the tractor shovel 2 puts the supply material into the bucket 8a of the supply device 8 (FIG. 5).

When the supply material is put into the bucket 8a,
The load of the replenishing material is adjusted by the load cells 22a, 22a together with the change in the load caused by the vibration of the penetration of the casing 3.
b, 22c, and the load cells 22a, 22b, 22c are displaced according to the load. This displacement is converted into an electric signal by the dynamic distortion amplifier 25,
AC component of this electric signal in 5 (noise due to vibration)
Is removed. Then, the signal from which the AC component has been removed is output to the weighing board 24 as a load cell output signal. Therefore, the load cell output signal input to the weighing board 24 has a substantially constant value indicating the weight of the supply material loaded on the bucket 8a.

After a supply material (for example, 0.9 m ³ ) is supplied into the bucket 8 a almost once, the weighing button 27 D
Is turned on, the volume of the supply material in the bucket 8a is calculated and measured based on the load cell output signal, and the measured value is temporarily stored in the measuring board 24. At the same time, the output from the weighing board 24 to the patrol light is stopped, and the patrol light is turned off.

At the stage when the weighing button 27D is turned ON, the weighing of the replenishment material has not yet been determined.
By putting additional supply material into the bucket 8a and turning on the weighing button 27D again, the volume of the supply material is calculated and measured based on a load cell output signal indicating the weight of the added supply material. , And the measured value is stored.

When the replenishing material is measured by turning on the measuring button 27D, the bucket cylinder 8b of the supply device 8 is operated to incline (dump up) the bucket 8a and supply the replenishing material into the hopper 6. When the supply material is supplied from the bucket 8a, the limit switch 23 provided in the hopper 6 detects the supply and outputs a detection signal to the measuring board 24.

When the detection signal from the limit switch 23 is inputted, the measured value of the volume of the replenishment material previously stored in the measuring board 24 is determined, and based on the measured value, the accumulated soil amount (from the first input) Is calculated and stored as integrated degree data.

When all the replenishing materials in the bucket 8a are supplied, the bucket cylinder 8b of the supply device 8 is contracted and the bucket 8a is returned to the original position (dump down). The supply material supplied to the hopper 6 is
Along the periphery of the casing 3 or through a through hole provided in the casing 3 to flow into the inside of the casing 3 and fall to the tip of the casing 3.

The casing 3 penetrates while repeating the weighing and feeding of the supply material as described above, and when the casing 3 reaches the maximum depth (FIG. 4C), after the bucket 8a is dumped up. , Press the end button 27B
N operations (FIG. 5).

When the switch signal is input to the weighing panel 24 by turning on the penetration end button 27B, the maximum depth of the casing 3 is designed on the weighing panel 24 based on the depth data input from the depth gauge 3d. The soil volume (total amount of supply material necessary for placing the pillar) is calculated and stored as the maximum depth data and the design soil volume data.

After the casing 3 has reached the maximum depth and the penetration end button 27B has been turned ON, the process proceeds to the step of pulling out the casing 3 and re-penetration (returning) (FIG. 4 (d)). That is, after the casing 3 is pulled out by a predetermined amount and replenishing material is replenished from the front end of the casing 3 into the ground, the vibratory hammer 5 is operated again to penetrate the casing 3 again and compact the replenishing material replenished in the ground. The degree of compaction is determined with reference to the tip depth meter of the casing 3 and the current value of the vibratory hammer 5.

During the process of pulling out and re-penetrating the casing 3, the measuring board 24 determines the casing 3 from the depth data input from the depth gauge 3 d and the integrated soil volume data calculated and stored by the measuring board 24. The remaining amount of the replenishment material remaining inside or around (the depth of the upper surface of the replenishment material in or around the casing 3) is calculated and stored as residual soil amount indicator data.

During the process of pulling out and re-penetration of the casing 3, while performing construction management based on the residual soil amount indicator signal, similarly to the above, charging of the supply material into the bucket 8 a of the supply device 8, 20 measures the supply material in the bucket 8a and supplies the supply material from the bucket 8a to the hopper 6. Then, by repeating the pull-out and re-penetration of the casing 3 and the supply of the supply material,
The accumulated soil volume reaches the design soil volume, the casing 3 is pulled out to the ground, and the placing of one pile pillar is completed (FIG. 4).
(E)).

Before the completion of the installation of the pile columns and before the accumulated soil volume reaches the design soil volume, the final input adjustment of the supply amount of the supply material to the hopper 6 is performed.

When the placing of one pile post is completed, the operation panel 2
7 is turned on. By turning on the all-reset button 27A, data such as design soil volume data, integrated soil volume data, deepest depth data, remaining soil volume indicator data and the like stored in the weighing panel 24 are deleted, and Move to

From the start of the penetration of the casing 3 to the penetrating step of the casing 3, the pulling-out of the casing 3 and the re-penetrating step, from the measuring board 24 to the pen recorder 26 until one pile post is completed. A remaining soil indicator signal indicating the remaining soil indicator data, a design soil signal indicating the designed soil data, and an integrated soil signal indicating the integrated soil data are transmitted. At the same time, a signal indicating the current value data from the ammeter 5a of the vibro hammer 5 and a signal indicating the depth of the casing 3 from the depth meter 3d of the casing 3 are input to the pen recorder 26, respectively. The data is recorded.

FIG. 6 shows a display example of each data chart recorded by the pen recorder 26. The data chart printed by the pen recorder 26 includes the following
The time series of the data is included. Current value data flowing through vibratory hammer 5 Remaining soil indicator data indicating the remaining amount of replenishing material remaining inside and around casing 3, and the remnant soil indicator data is represented by the depth of the upper surface of the replenishing material. Casing 3 depth data Design soil volume data Replenishment material input volume integrated value data

The above-mentioned residual soil indicator data is calculated and calculated by the measuring board 24 from the depth of the casing 3 and the integrated value data of the replenishing material. The residual soil indicator data is, for example, a sand gauge. This is equivalent to the measurement data when the upper surface of the supply material inside the casing 3 is measured. That is, the through holes 3a, 3a
In the ground improvement method using the casing 3 having ..., the supply material cannot be measured using the sand surface gauge, but from the measurement data using the measuring device 20, it is equivalent to the case using the sand surface gauge. Since the above data can be obtained, it is possible to use the construction management of the construction method using a sand surface gauge, which is conventionally performed conventionally, as it is.

As described above, according to the civil engineering material measuring device 20 of this embodiment and the supplementary material measuring method using the civil engineering material measuring device 20, the supplementary material is measured by measuring the weight. Compared to measuring the volume after supplying the replenishing material using a sand surface gauge, for example,
The workability of weighing and the accuracy of weighing are improved.

Note that the civil engineering material measuring device 20 of this embodiment is not only useful when used for ground improvement work, but also to improve the workability and the measurement accuracy throughout the civil engineering work. You can expect.

That is, conventionally, when weighing civil engineering materials in civil engineering work, the weighing is performed by volume. For example, the civil engineering materials are loaded on a container (for example, a bucket or a hopper) to be weighed and the surface is leveled. In contrast, according to the civil engineering material weighing device 20 of the present embodiment, since the civil engineering material is loaded on the bucket 8a and the measuring button 27D is turned on, the measurement can be performed. Workability has been improved by several steps. In addition, in the case of conventional measurement by volume, when the civil engineering material adheres to a container (for example, a bucket or a hopper) to be measured, a measurement error of the attached amount is accumulated every time measurement is repeated. According to the civil engineering material weighing device 20 of this embodiment, the measurement accuracy is improved by several steps, for example, the error can be easily removed by tare correction.

The civil engineering material weighing device of the present invention is not limited to the civil engineering material weighing device 20 of this embodiment, but may be, for example, load cells 22a to 2 as weighing means.
2c and a noise removing circuit 25r as noise removing means
(Analog filter, moving average circuit) and the detailed structure specifically shown such that the weighing device 20 and the supply device 8 are integrally provided can be changed without departing from the spirit of the invention. is there.

Further, the method for measuring civil engineering materials according to the present invention is not limited to the method for measuring replenishing materials shown in this embodiment. For example, zero point adjustment, span adjustment, and tare correction are performed in accordance with the present invention. The detailed method specifically shown in addition to the invention and outputting the final measurement result as a volume value can be changed without departing from the spirit of the invention.

According to the ground improvement method of this embodiment, the replenishing material is measured and weighed by the civil engineering material measuring device 20, and then the replenishing material is put into the popper 6. As compared with the case where the supply material is measured using the sand surface gauge, the work efficiency of the ground improvement method is improved by several steps. In other words, in the case where the replenishing material is measured using the sand surface gauge, the replenishing material cannot be put into the casing during use of the sand surface gauge, and the work efficiency is reduced. According to the ground improvement method of the form, during the measurement of the supply material, the casing 3 can be continuously penetrated or pulled out, and the measurement method is also such that the supply material is put into the bucket 8a of the supply device 8, and the measurement button 27D is pressed. ON
Since only the operation is performed, the work efficiency of the entire ground improvement work is improved by several steps.

In this embodiment, the ground improvement method is described in which the casing 3 provided with the plurality of through holes 3a is used to supply the replenishing material near the ground surface.
In the ground improvement method of using a casing without a through-hole instead of the casing 3 and charging a supplementary material into a hopper provided at an upper portion of the casing without the through-hole, the civil engineering material measuring apparatus and the civil engineering material measuring apparatus of the present invention are also used. It is easy to apply the method of measuring the supply material using the device.

For example, if the replenishing material is piled up in a skip bucket as in the prior art, lifted to the upper part of the casing, and then put into the hopper on the upper part of the casing, a weighing device similar to the weighing device 20 of this embodiment can be used. It is provided on the ground, and when the supply material is loaded on the skip bucket, by measuring the weight of the skip bucket with the weighing device, the supply amount of the supply material by the skip bucket can be measured. Similarly to the bucket 8a, the load cells 22a, 22b, 22c and the base 21 shown in the embodiment, the skip bucket and the weighing device (load cell and base) are integrated, and the weighing device (load cell and base) and the casing It may be lifted to the upper part. In any case, the same effect as the ground improvement method of this embodiment can be obtained.

[Second Embodiment] Next, a second embodiment of the present invention will be described.
A description will be given of a civil engineering material measuring apparatus 200 according to an embodiment of the present invention and a civil engineering material measuring method using this apparatus.

FIG. 7A is a configuration diagram of a civil engineering material measuring apparatus 200 according to this embodiment. FIG. 7B is a top view of the base 21 and the load cells 22a to 22d.

[0086] Civil engineering material measuring device 200 of this embodiment.
Is different from the civil engineering material weighing device 20 of the first embodiment in that a fourth load cell 22d and a new configuration accompanying the fourth load cell 22d are added, and the other configuration is different from the civil engineering material weighing device of the first embodiment. It is almost the same as the device 20. Therefore, the same components as those of the civil engineering material weighing device 20 of the first embodiment are denoted by the same reference numerals, and description thereof will be omitted, and only different points will be described.

[0107] Civil engineering material measuring apparatus 200 of this embodiment
Has a function of performing dummy measurement in a state where substantially the same vibration as the civil engineering material is applied together with the measurement of the civil engineering material, and correcting the measured value of the civil engineering material based on the measured value of the dummy measurement. 21, first to third load cells 22a
To 22c, a fourth load cell 22d as auxiliary weight measuring means, a dynamic strain amplifier 250, a weighing board 240, and
It comprises a pen recorder 26, an operation box 27 and the like, not shown.

The fourth load cell 22d has the same characteristics as the first to third load cells 22a to 22c, and is provided on the base 21 similarly to the first to third load cells 22a to 22c. . This fourth load cell 22d
Is subjected to a known weight load, and the amount of displacement of the fourth load cell 22d changes in accordance with a change in the load of the known weight caused by vibration caused by civil engineering work. Here, the load applied to the fourth load cell 22d is set to “0 ton”, that is, a state of no load, and the fourth load cell 22d is set to a state of no load according to a change in load caused by the weight of the fourth load cell 22d due to the vibration of the civil engineering work. 4 load cell 2
The displacement amount of 2d changes.

The fourth load cell 22d may be loaded with a certain amount of weight, so that the contents of correction can be made more suitable in practice. The characteristics and arrangement of the fourth load cell 22d are not particularly limited as long as the fourth load cell 22d can be subjected to substantially the same vibration as the first and second load cells 22a to 22c.

Similarly to the dynamic distortion amplifier 25 of the first embodiment, the dynamic distortion amplifier 250 converts the displacement of the first to third load cells 22a to 22c into electric signals and outputs the electric signals. Similarly, the displacement amount is converted into an electric signal and output to the load cell 22d.

The dynamic distortion amplifier 250 is provided with a noise removing circuit 250r as noise removing means and auxiliary noise removing means. This noise removal circuit 250
r exerts the same noise elimination function as the noise elimination circuit 25r of the first embodiment on a signal indicating the amount of displacement of the first to third load cells 22a to 22c, and the fourth load cell 22d For the signal indicating the amount of displacement of
The same effect of noise removal is provided. The electric signals indicating the displacement amounts of the first to fourth load cells 22a to 22d are output to the weighing panel 240 as first to fourth load cell output signals after the noise is removed by the noise removing circuit 250r. .

The weighing board 240 includes a correction module as a correcting means in addition to the functions of the weighing board 24 of the first embodiment. The correction module includes a fourth load cell 2
Based on the fourth load cell output signal output from 2d, the measured value of the civil engineering material loaded in the bucket 8a is corrected as follows.

ΔW4: Weight measurement value indicated by the fourth load cell output signal W0: Weight measurement value of the measurement object loaded in the bucket indicated by the first to third load cell output signals WR: Measurement object in the bucket WR = W0−ΔW4 as the corrected weight measurement value of

The correction method based on the fourth load cell output signal is not limited to the above method. For example, when a large weight is loaded on the fourth load cell 22d, W4 ': Weight measurement value indicated by fourth load cell output signal W4: True value of weight applied to fourth load cell 22d W0: Weight of measurement target loaded in bucket indicated by first to third load cell output signals Measurement value WR: WR = W0 × (W4 / W4 ′) as a corrected weight measurement value of the measurement object in the bucket.
And WR = W0 + (W4−
There may be various correction processes such as a correction such as W4 ′) or a correction obtained by combining the above corrections with weights. Further, there is a method in which an appropriate correction amount corresponding to the fourth load cell output signal is derived through an experiment, and the correction amount is corrected based on the derived correction expression.

Next, the civil engineering material measuring device 2 of this embodiment
A method for measuring civil engineering materials using the method No. 00 will be described.
In order to measure civil engineering materials using the civil engineering material measuring device 200 of this embodiment, as in the first embodiment, zero adjustment and span adjustment are performed in advance in a quiet place without vibration.
In addition, the unit volume weight of the civil engineering material to be measured is measured. Then, during the civil engineering work, first, the tare button 27E is turned on to correct the tare, and then the civil engineering material to be weighed is loaded in the bucket 8a.

When the civil engineering material is loaded in the bucket 8a,
The weight of the civil engineering material is changed in accordance with the load due to vibration (vibration accompanying civil engineering work) together with the first to third load cells 22a.
To 22c, and the first to third load cells 22a to 22c are displaced according to the load. On the other hand, in the fourth load cell 22d, a change in load occurs due to its own weight and vibration, and a displacement occurs according to the load. And
The displacements of the first to fourth load cells 22a to 22d are converted into electric signals by the dynamic distortion amplifier 250, and the same noise removal processing is performed by the noise removal circuit 250r. The first to fourth load cell signals from which high-frequency components have been removed are output to the weighing panel 240.

Of these, the first to third load cell output signals are signals indicating the weight of the civil engineering material being measured substantially at rest, and the fourth load cell output signal is at rest. The signal is a signal that gives information on a difference between the measured value and the measured value accompanied by vibration.

When the civil engineering material is loaded on the bucket 8a and the weighing button 27D is turned on, the first to fourth load cell output signals are read into the measuring board 240, and the civil engineering material in the bucket 8a is measured. Will be That is, the weight measurement value of the civil engineering material is calculated from the first to third load cell output signals, and then the above-described correction processing is performed by the correction module based on the fourth load cell output signal. The volume value of the civil engineering material is calculated and stored from the measured weight value.

After the weighing button 27D is turned on, as in the case of the first embodiment, if the weighing can be confirmed with the operation,
The supply device 8 is operated to input the civil engineering material in the bucket 8a, and the volume value of the civil engineering material previously stored is determined as the measured value by the limit signal detected by the input.

As described above, according to the civil engineering material measuring apparatus 200 and the civil engineering material measuring method of this embodiment, the first
In addition to the effects of the civil engineering material measuring device 20 and the civil engineering material measuring method of the embodiment, the error caused by the vibration can be corrected by the fourth load cell 22d and the correction module in the measuring board 240, so that the accuracy is further improved. High weighing can be performed.

By using the civil engineering material measuring apparatus 200 of this embodiment for ground improvement work in the same manner as in the first embodiment, it is possible to measure the supply material with higher accuracy. The process control and quality control of the entire ground improvement work can be improved.

[0102]

According to the first aspect of the present invention, since the civil engineering materials are measured by measuring the weight, the workability of the measuring is improved as compared with the conventional method of measuring and measuring the volume. As well as the accuracy of weighing is improved. In addition, since noise can be measured by removing noise due to vibration by the noise removing means, accurate measurement can be performed even in civil engineering work involving vibration.

According to the second aspect of the present invention, the known weight is measured by the auxiliary weight measuring means and the auxiliary noise removing means under the same conditions as the weight measurement of the civil engineering material, and the measured value is compared with the original weight. Based on this difference, the measurement error due to vibration can be corrected from the measurement result of the civil engineering material, so that the measurement can be performed accurately even in civil engineering work involving strong vibration and is useful.

According to the third and fourth aspects of the invention, the same effects as those of the first and second aspects of the invention can be obtained.

According to the fifth aspect of the present invention, the weight of the replenishing material to be put into the casing is measured by using the civil engineering material measuring device according to the first aspect of the present invention.
As shown in the example, compared to conventional weighing using a sand gauge, the workability and accuracy of weighing are improved,
It is possible to improve the work efficiency and the quality of the entire ground improvement work. In the conventional soil improvement method using a sand surface gauge, while the measurement with the sand surface gauge did not allow the supply of replenishing material to the casing, resulting in a decrease in work efficiency, the ground improvement method of the present invention In the construction method, the measurement of the replenishment material and the supply of the replenishment material can be performed continuously, and during the measurement by the civil engineering material measuring device, the casing can be pulled out or knocked back (including vibration) in parallel. . In other words, pulling out and punching back from the penetration of the casing into the ground,
It can be performed continuously, and work efficiency is dramatically improved. In the construction method using the sand surface gauge, since the amount of the supply material is measured after the supply material is supplied, there is a problem that it is difficult to accurately control the supply amount of the supply material,
According to the construction method of the present invention, since the replenishing material is measured before it is charged into the casing, it is possible to accurately measure and control the amount of the replenishing material. Therefore, the quality of the ground improvement work can be improved.

According to the sixth aspect of the invention, even if the casing is relatively thick, the replenishing material can be smoothly supplied to the ground, and the operation of putting the replenishing material into the casing always requires the ground surface. According to the present invention, in the ground improvement method having an effect that can be performed, the sand surface gauge was buried in the replenishing material in the measurement using the conventional sand surface gauge, and the measurement was not successfully performed. In addition to being able to accurately measure the material, the workability of the measuring process and the accuracy of the measurement are improved as in the case of the ground improvement method according to claim 5, thereby improving the work efficiency of the entire ground improvement work and improving the quality. Can be improved.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a schematic configuration of a ground improvement apparatus for implementing a ground improvement method of the present invention.

2A and 2B show details in the vicinity of a supply device of a replenishing material in the ground improvement device of FIG. 1, wherein FIG.
(B) is a top view, and (c) is a side view in a state where the supply device is operated.

FIG. 3 is a configuration diagram showing a system configuration of the civil engineering material weighing device according to the first embodiment of the present invention.

FIG. 4 is a schematic view showing a schematic series of construction procedures (a) to (e) of the ground improvement method of the present invention.

FIG. 5 is a schematic diagram showing a series of procedures of a method of measuring a supply material, which is a feature of the present invention, performed in the ground improvement method of FIG.

FIG. 6 is an example of a chart diagram printed and output by the pen recorder of FIG. 3;

FIG. 7 shows a system configuration of a civil engineering material measuring apparatus according to a second embodiment of the present invention, wherein (a) is a configuration diagram thereof,
(B) is a top view of the base and the load cell viewed from above.

8A and 8B are diagrams for explaining a problem related to the measurement of civil engineering materials in a conventional civil engineering work, in which FIG. 8A is a schematic view of a ground improvement device that performs a conventional ground improvement method, and FIG. It is a schematic diagram which shows the measuring method of the replenishment material performed by the improvement method.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Ground improvement device 3 Casing 3a ... Plural through-holes provided in the casing 8 Supply device 20 Civil engineering material measuring device (1st Embodiment) 21 Base 22a-22c 1st-3rd load cell (weight measuring means) 24 weighing board 25 dynamic distortion amplifier 25r noise elimination circuit (noise elimination means) 26 pen recorder 27 operation box 200 civil engineering material weighing device (second embodiment) 22d fourth load cell (auxiliary weight measuring means) 240 weighing board (Second Embodiment: Includes a correction module as a correction unit inside.) 250 Dynamic Distortion Amplifier (Second Embodiment) 250r Noise Removal Circuit (Second Embodiment: Includes Auxiliary Noise Removal Unit) In.)

 ──────────────────────────────────────────────────続 き Continuing from the front page (72) Inventor Kenshi Morita 4-1-1 Komyobashi, Chuo-ku, Osaka-shi, Osaka Inside Toyo Construction Co., Ltd. (72) Inventor Atsushi Sugimoto 4-1-1 Komyobashi, Chuo-ku, Osaka-shi, Osaka No. 1 Toyo Construction Co., Ltd.

Claims (6)

[Claims] 1. A civil engineering material measuring device for measuring civil engineering materials used in the civil engineering work, wherein the weight of the civil engineering materials is measured together with a change in a load caused by vibration accompanying the civil engineering work. A weight measuring unit; and a noise removing unit that fetches a measurement result of the weight measuring unit in a time series and removes noise accompanying the vibration from the time series of the measurement result, wherein the noise is removed by the noise removing unit. And measuring the civil engineering material based on the measurement result. 2. An auxiliary weight measuring means for measuring a known weight under substantially the same vibration as that of the civil engineering material at substantially the same time as the measurement of the civil engineering material, and the noise removal from the measurement result of the auxiliary weight measuring means. Auxiliary noise removing means for removing noise similar to the means; and a measurement result of a known weight from which noise has been removed by the auxiliary noise removing means and a difference between an original value of the known weight and the civil engineering material. The civil engineering material weighing device according to claim 1, further comprising a correction unit configured to correct the measurement result. 3. A civil engineering material weighing method for weighing civil engineering material used in the civil engineering work, wherein the weight of the civil engineering material is measured together with a change in a load caused by vibration accompanying the civil engineering work. A measurement process and a noise removal process for removing the noise accompanying the vibration from the time series of the measurement results obtained by the measurement process in a time-series manner are performed, and the noise is removed by the noise removal process. And measuring the civil engineering material based on the measurement result. 4. An auxiliary measurement process for measuring a known weight in a state where substantially the same vibration as that of the civil engineering material is applied substantially simultaneously with the measurement of the civil engineering material, and the noise obtained from the measurement result obtained by the auxiliary measurement process. An auxiliary noise elimination process for performing the same noise elimination as the elimination process; and a measurement result of a known weight from which noise has been eliminated by the auxiliary noise elimination process, and a difference between the original value of the known weight and the civil engineering 4. The method for measuring civil engineering materials according to claim 3, further comprising a correction process for correcting a measurement result of the material. 5. A casing penetrates into the ground, and a supplementary material for improving the ground introduced into the casing is supplied into the ground while pulling out the casing, and the casing is beaten back in the process of pulling out the casing. In the ground improvement method of compacting the supplementary material supplied into the ground by vibrating or shaking, and placing a pile pillar of the supplementary material compacted in the ground, an input amount of the supplementary material for one time is claimed. A ground improvement method, comprising: weighing using the civil engineering material weighing device according to (1), and then charging the supplementary material into the casing. 6. A hollow casing having a plurality of through holes extending from the outside of the casing to the inside of the casing penetrates the ground, and a replenishing material for improving the ground is supplied from the ground to the periphery of the casing. Is supplied into the casing through a through-hole provided in the casing, the supplementary material is supplied into the ground from the tip of the casing while the casing is pulled out, and the casing is knocked back or vibrated in the process of pulling out the casing. The ground improvement method of compacting the replenishing material replenished in the ground and placing a pile of the replenishing material compacted in the ground, wherein the input amount of the replenishing material for one time is added. Weighing using a civil engineering material weighing device, and then charging the supplementary material into the casing.