JP2020133361A - Quality management method of viscous soil loosening treatment and system - Google Patents

Abstract

To provide a quality management method of viscous soil loosening treatment and a system which dispense a previous loosening test, can quickly and appropriately determine loosening completion timing and can appropriately perform quality management of the loosening treatment with simple constitution, when viscous soil is subjected to loosening treatment.SOLUTION: A quality management method of viscous soil loosening treatment continuously measures at least one of a moisture content, concentration and density of viscous soil in loosening in quality management for viscous soil loosening treatment (S02), and determines completion of the loosening when measurement values are settled in predetermined ranges (S03 and S04).SELECTED DRAWING: Figure 1

Description

The present invention relates to a quality control method / system for demudging of cohesive soil.

Conventionally, it is known that a mixed material obtained by mixing steelmaking slag or the like as a modifier with cohesive soil is used as a shallow / tidal flat construction material, a submarine material, a ground material, or the like. At the time of this use, operations such as demudification of cohesive soil, addition / preparation of mud, mixing after addition of modifier, and casting are required.

When dehumidifying cohesive soil using a backhoe or the like, it is necessary to demud until a homogeneous state is obtained in order to ensure a certain quality. For this reason, in the conventional mud demolition of cohesive soil, as a preliminary confirmation, a mud demolition test is performed to determine the mud demolition time, and the actual demud treatment is performed at the demud time.

Patent Document 1 is provided in a flow path of a mud drain pipe close to a chamber in order to provide a muddy water viscosity measuring system capable of measuring the viscosity of muddy water in a chamber in real time and accurately in a muddy water type shield method. A diversion device that flows muddy water containing the above into a mud drainage pipe as the main stream to flow muddy water from which coarse particles have been removed to a tributary, and a branch pipe as a tributary that branches from the diversion device to flow muddy water from which coarse particles have been removed. A pump installed in the branch pipe to introduce muddy water from the diversion device, a control device to adjust the introduction force of the pump, and a vibration type installed in the branch pipe to measure the viscosity of the muddy water from which coarse particles have been removed. A viscometer and a muddy water viscosity measuring system composed of the viscometer are disclosed.

Japanese Unexamined Patent Publication No. 10-325790

When measuring the wet density for mud removal construction management of cohesive soil, several liters (L) are required for each sample in order to obtain a stable value, and sampling at multiple points (collecting as necessary) (Changing the location and sampling depth), transportation, and measurement are complicated tasks. For this reason, a mud demolition test of cohesive soil is conducted at the initial stage of construction, changes over time in the water content ratio and wet density are measured, and the time until the measured values converge to a certain value is set as the time required for homogenization. , The method of determining the mud removal time in the subsequent construction is common. However, if the properties of the cohesive soil (soil quality and water content ratio) are different from those at the time of the test, such as when the sampling location and sampling depth of the cohesive soil change in a large-scale construction, excess or deficiency of demud will occur. For this reason, if the mud removal time is insufficient in the mud demolition process of cohesive soil, the quality of cohesive soil may vary, and such quality variation is caused by addition / mixing of a modifier or the like to cohesive soil. It is not preferable in terms of quality control of mixed materials. Further, for efficient construction, it is desired to be able to quickly determine the completion of mud removal.

Further, according to the muddy water viscosity measurement system of Patent Document 1, a diversion device for flowing muddy water from which coarse particles have been removed to a branch pipe for measuring the viscosity of muddy water, a pump for introducing muddy water from the diversion device into a branch pipe, and a pump. A control device or the like for adjusting the introduction force is required, resulting in a complicated system configuration.

In view of the above-mentioned problems of the prior art, the present invention does not require a prior mud removal test when performing mud removal treatment of cohesive soil, and can quickly and appropriately determine the completion time of mud removal. It is an object of the present invention to provide a quality control method and system for cohesive soil demolition treatment, which can appropriately perform quality control of treatment with a simple configuration.

The quality control method for the cohesive mud demolition treatment for achieving the above object is the quality control method for the cohesive mud demolition treatment, and is at least among the water content, concentration and density of the cohesive soil at the time of demudification. Any one of them is continuously measured, and it is determined that the demudification is completed when the measured values converge within a predetermined range.

According to this quality control method for cohesive soil demolition treatment, at least one of the water content, concentration, and density of cohesive soil at the time of demudification is continuously measured, and the measured values converge within a predetermined range. The time when the measured value falls within the specified range is defined as the time when the tendency of the measured value to rise and fall is settled and the convergence of the variation in the measured value can be confirmed. At this point, the water content, concentration, and density of the cohesive soil are within a predetermined range. It is when the soil has converged and the mud removal of the cohesive soil has progressed sufficiently and completed. In this way, quality control of mud removal treatment is appropriately performed with a simple configuration, and the completion of mud removal can be quickly and appropriately judged based on the convergence of the measured values of water, concentration, and density within a predetermined range. Material (cohesive soil) can be obtained. In addition, the conventional mud removal test in advance becomes unnecessary.

In the quality control method of the cohesive soil demolition treatment, the average value of the measured values is calculated based on the measured values within the predetermined time before the determination, and the predetermined range is preferably 80 to 120% of the average value. , More preferably 90 to 110%. In this case, the average value Av of the measured values within the first predetermined time T1 before the judgment is calculated, and when the measured value at the time of judgment is within the predetermined range obtained from the average value Av, it is determined to be suitable. Then, when the measured value within the second predetermined time T2 is within the predetermined range obtained from the average value Av (does not exceed the predetermined range), it may be determined that the mud removal is completed.

In addition, it can be determined that the mud removal is completed when the measurement is performed at a plurality of points in the predetermined area where the mud removal is performed and the measured values at the plurality of points converge within the predetermined range.

Further, it is preferable to carry out the measurement at one or a plurality of points in a predetermined region where the mud removal is performed, depending on the amount of the cohesive soil and at least one of the machines used for the mud removal.

In addition, the measurement can be performed in the bucket when the mud is removed from the cohesive soil by the bucket.

The quality control system for cohesive soil demolition treatment for achieving the above object is a quality control system for cohesive soil demud treatment, and is at least among the water content, concentration, and density of the cohesive soil at the time of demudification. A measuring means having a measuring sensor for continuously measuring any one of them, and a determining means for determining that the demudification is completed when the measured values converge within a predetermined range are provided.

According to this quality control system for cohesive mud demolition treatment, at least one of the water content, concentration, and density of cohesive soil at the time of demudification is continuously measured, and the measured values converge within a predetermined range. The time when the measured value falls within the specified range is defined as the time when the tendency of the measured value to rise and fall is settled and the convergence of the variation in the measured value can be confirmed. At this point, the water content, concentration, and density of the cohesive soil are within a predetermined range. It is when the cohesive soil has converged and the mud has been sufficiently demud. In this way, quality control of mud removal treatment is appropriately performed with a simple configuration, and the completion of mud removal can be quickly and appropriately judged based on the convergence of the measured values of water, concentration, and density within a predetermined range. Material (cohesive soil) can be obtained. In addition, the conventional mud removal test in advance becomes unnecessary.

The quality management system for the cohesive soil demolition treatment is provided with a calculation means for calculating the average value of the measured values based on the measured values within a predetermined time before the determination, and the predetermined range is preferably the average value. It is 80 to 120%, more preferably 90 to 110%.

Further, the measurement is performed by the plurality of measurement sensors arranged at a plurality of points in the predetermined region for demudification, and the determination means converges each measurement value by the plurality of measurement sensors within the predetermined range. It can be configured to determine that the demudification is completed at that time.

In addition, the cohesive soil can be demudified by a bucket, and the measurement sensor can be arranged in the bucket.

Further, the cohesive soil at the time of demudging can be stored in a storage unit, the demudification is performed in the storage unit, and the measurement sensor can be arranged at one or a plurality of points in the storage unit.

Further, it is preferable to arrange the measurement sensor so that the measurement sensor is located in the cohesive soil at the time of demudification and is located above half the depth of the cohesive soil.

Further, when a communication means for communicating with an external terminal and a storage means for storing and registering information identifying the external terminal are further provided and the determination means determines that the mud removal has been completed. It is preferable that the communication means is configured to notify an external terminal registered in the storage means that the mud removal has been completed.

According to the quality control method / system for cohesive soil demolition treatment of the present invention, no prior demudification test is required when demineralizing cohesive soil, and the completion time of mud removal can be determined quickly and appropriately. , Quality control of mud removal treatment can be performed appropriately with a simple configuration.

It is a flowchart for demonstrating the basic steps S01-S04 of the quality control method in the demudification treatment of cohesive soil by this embodiment. It is a flowchart for demonstrating more detailed steps S21-S24 in step S03 of completion determination of FIG. It is a side sectional view (a) and a top view (b) which show schematicly which the earth carrier which can carry out the demudification treatment of the cohesive soil of FIG. It is a block diagram which shows the structural example of the measurement system which can execute steps S02-S04, S21-S24 of FIG. 1 and FIG. It is a side view which shows typically the state which arranged the measurement sensor in the bucket of FIG. 3 (b). It is a top view (a)-(d) which shows each arrangement position of the measurement sensor in the storage part and the bucket of the earth carrier of FIG. 3 (a) (b). Top views (a) to (d) show the arrangement positions of the measurement sensors when the cohesive soil and the modified soil stored in the steel container are demudged. It is a graph which shows the result of having measured the water content ratio by an ultrasonic densitometer at the time of demudification of cohesive soil (liquid limit: 62.6wL) in this measurement example.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings.

FIG. 1 is a flowchart for explaining the basic steps S01 to S04 of the quality control method in the demudging treatment of cohesive soil according to the present embodiment. FIG. 2 is a flowchart for explaining more detailed steps S21 to S24 in step S03 of the completion determination of FIG. FIG. 3 is a side sectional view (a) and a top view (b) schematically showing a soil carrier capable of performing demudification treatment of the cohesive soil of FIG. FIG. 4 is a block diagram schematically showing a configuration example of a measurement system capable of executing steps S02 to S04 and S21 to S24 of FIGS. 1 and 2.

As shown in FIG. 1, the cohesive soil is demudified in the cohesive soil storage portion 10 (S01). In the mud removal treatment, for example, as shown in FIGS. 3A and 3B, the earthen carrier SP that stores the cohesive soil is berthed in the storage part 10 formed of the earthen tank of the earthen ship SP, and is adjacent to the storage part 10. Therefore, a plurality of backhoes 11 and 14 can be arranged on the land side. Buckets 12 and 15 are connected to the backhoes 11 and 14 extending from the backhoes 11 and 14.

In the storage unit 10, the backhoes 11 and 14 are operated to move the buckets 12 and 15 left and right and back and forth as shown in FIG. 3B, and in addition, the buckets 12 and 15 are also moved up and down at each movement. By doing so (not shown), the cohesive soil in the storage unit 10 and the water on the cohesive soil 10 are stirred and flowed to obtain a cohesive soil G. For example, by moving the bucket 12 to the left m to the position of the broken line, the cohesive soil G is made to flow in the arrow directions a and a'in the figure, and the bucket 15 is moved to the position of the broken line in the direction n in front of the arrow. The cohesive soil G is flowed in the directions b and b'in the figure. By operating the buckets 12 and 15 in combination with the left-right movement, the front-back movement, and the up-down movement, the cohesive soil G is demudified by stirring and flowing.

During this demud treatment, the water content ratio of cohesive soil G is continuously measured (S02). Such measurement is performed by a measuring instrument for measuring the water content ratio and the like, for example, the ultrasonic densitometers 13 and 16 in FIG. 4, and as shown in FIGS. 3 (a) and 3 (b), a horizontally long rectangle when viewed from above. Two measurement sensors 20 and 30 for ultrasonic densitometers 13 and 16 (FIG. 4) arranged at both corners of the long side of the rectangular storage portion 10 are used. The measurement sensors 20 and 30 are located in the cohesive soil G stored in the storage unit 10 to perform measurement, and are located above half the depth (longitudinal length) of the cohesive soil G in the storage unit 10. Arranged to do. Therefore, when the capacity of the cohesive soil stored in the storage unit 10 increases or decreases and the depth of the cohesive soil increases or decreases with each mud removal treatment, it is preferable to adjust the measurement positions of the measurement sensors 20 and 30 up and down in advance. .. The ultrasonic densitometer measures the concentration and moisture by oscillating ultrasonic waves in the object to be measured, and can perform continuous measurement.

Next, it is determined whether or not the measured values such as the water content ratio obtained in step S02 converge and fall within the predetermined range (S03), and when the measured values converge within the predetermined range, the cohesive soil is demudified. Is determined to be completed (S04). If the measured value does not fall within the predetermined range, the process returns to step S01 and the mud removal process is continued.

Next, an example of the completion determination of step S03 of FIG. 1 will be described with reference to FIGS. 2 to 4. In the measurement system of FIG. 4, the measurement data by the measurement sensors 20 and 30 of FIGS. 3 (a) and 3 (b) is sent from the ultrasonic densitometers 13 and 16 to the personal computer (personal computer) PC and taken in. The measured value is recorded from the measured data together with the measurement time, the average value of the measured values is calculated from the measured values measured within the predetermined time, and the predetermined range is calculated from the average value. Further, it is determined whether or not the measured value is within a predetermined range, and the result is displayed on the display unit DP made of a liquid crystal or the like. The ultrasonic densitometers 13 and 16 and the personal computer PC can be connected by wire or wirelessly via an appropriate interface. Further, when the personal computer PC determines that the mud removal treatment of the cohesive soil is completed, the information on the completion of the mud removal is transmitted to the external mobile terminals SM1, SM2 and SM3 via the communication network I such as the Internet.

By the measurement system of FIG. 4, in step S02 of FIGS. 1 and 2, for example, the measured values are continuously measured at predetermined time intervals by the ultrasonic densitometers 13 and 16, and the personal computer PC automatically records the measured values together with the measurement time. To do.

That is, the average value Av of the measured values within the latest predetermined time T1 is calculated (S21), and the predetermined range is obtained from this average value Av. The predetermined range is 80 to 120% of the average value Av, but is not limited to this, and may be 90 to 110%, for example.

Next, it is determined whether or not the measured value after the elapse of the predetermined time T1 is within the predetermined range obtained from the average value Av (S22).

When it is determined that the measured value fits within the predetermined range (S23), then whether the measured value within the second predetermined time T2 is within the predetermined range obtained from the average value Av (does not exceed the predetermined range). Whether or not it is determined (S24), and if the measured value does not exceed the predetermined range, it is determined that the demudification treatment of the cohesive soil is completed (S04).

If the measured value does not fit within the predetermined range in step S22, or if the measured value exceeds the predetermined range in step S24, the process returns to step S01. Further, as shown in FIG. 4, the information on the completion of the mud removal process is transmitted to the mobile terminals SM1 and SM2 of the operation units 11b and 14b of the backhoes 11 and 14 via the communication network I such as the Internet, and is notified to the operator. The operator finishes the mud removal operation by the backhoes 11 and 14.

The quality control method of FIGS. 1 and 2 will be described by taking a specific time as an example. In step S02, the ultrasonic densitometers 13 and 16 perform continuous measurement such as acquiring one data per second, and step. For example, the average value Av of the measured values is calculated from the 60 data measured within the last 1 minute (predetermined time T1) in S21, the predetermined range is obtained from the average value Av, and the subsequent instantaneous value (measured value) in step S22. Is determined to be within the predetermined range, then, in step S24, the measured values are continuously measured in the same manner within, for example, 2 minutes (predetermined time T2), and each instantaneous value of 120 does not exceed the predetermined range. If it is judged, it is judged that the demudification is completed. The personal computer PC of FIG. 4 performs these arithmetic processes and determination / judgment processes, and displays the results on the display unit DP.

Next, the quality control system for the dehumidification treatment of cohesive soil according to the present embodiment will be described. -Ultrasonic densitometers 13 and 16 including measurement sensors 20 and 30 (FIGS. 3A and 3B) and an ultrasonic densitometer for continuously measuring at least one of concentration and density. It is configured to include a personal computer PC that determines that the mud removal is completed when the values measured by 13 and 16 converge within a predetermined range. An RI density moisture meter may be used as a measuring instrument for continuously measuring the water content ratio of cohesive soil and the like.

Further, the personal computer PC stores the addresses of the mobile terminals SM1, SM2 and SM3 in advance in a storage device such as a hard disk so that the mobile terminals SM1, SM2 and SM3 such as smartphones and tablets can communicate with each other via the communication network I such as the Internet. When it is determined that the dehumidification process is completed, the dehumidification completion information is transmitted to the external mobile terminals SM1, SM2, and SM3 to notify the user.

Further, among the measurement systems of FIG. 4 constituting the quality control system of the present embodiment, the personal computer PC and the display unit DP are installed in, for example, a construction site office or a management office, and the quality of mud removal treatment is performed in real time. You can check the management status. Further, by installing the mobile terminals SM1 and SM2 of FIG. 4 on the operation units 11b and 14b of the backhoes 11 and 14 of FIG. 3B, the operators of the backhoes 11 and 14 can easily complete the mud removal process. You can know. Further, when the person in charge of the mud removal process, the administrator, or the like carries the mobile terminal SM3, the completion of the mud removal process can be known at a position away from the personal computer PC / display unit DP.

As described above, in the quality control method / system for the cohesive soil demud treatment according to the present embodiment, the cohesive soil has fluidity, and a part of the cohesive soil is operated by a bucket with a back hoof in the storage unit. The completion of the demudification treatment can be determined by stirring, changing the stirring location as necessary, and checking the situation until the entire cohesive soil becomes uniform.

That is, according to the present embodiment, at least one of the water content, concentration, and density of the cohesive soil at the time of demudification is continuously measured, and the time when the measured values converge and fall within a predetermined range is determined. , The time when the tendency of the rising and falling of the measured value has subsided and the convergence of the variation of the measured value can be confirmed, and at that time, the water content, concentration and density of the cohesive soil converge to almost constant values within the predetermined range, and the cohesive soil It is when the mud removal has progressed sufficiently and completed. In this way, the completion of demudification can be determined quickly and appropriately based on the convergence of the measured values of water, concentration, and density within a predetermined range, and the quality control of demudification treatment is appropriately performed with a simple configuration and homogeneous. Material (cohesive soil) can be obtained. In addition, the conventional mud removal test in advance becomes unnecessary.

Further, in the storage unit 10, when cohesive soil having a low water content is contained, the cohesive soil mass may have settled downward, and when the measurement sensor is installed below, the cohesive soil mass is measured. It may adhere to the periphery of the sensor and an appropriate value may not be obtained, but as shown in FIG. 3A, the measurement positions of the measurement sensors 20 and 30 of the ultrasonic densitometers 13 and 16 (FIG. 4) are stored. Since it is above half the depth of the cohesive soil in the portion 10, it is possible to prevent such a defect at the time of measurement.

Further, according to the present embodiment, it is possible to centrally manage the measurement data of one point or a plurality of points where the mud is demudified by a personal computer, and manage the demud time in real time. That is, when the cohesive soil is demud, the water content, concentration and density are continuously measured, the measured values are confirmed in real time, the tendency of the measured values to rise and fall is settled, and the variation is ± 20% or less of the average value. Desirably, the demudification treatment by the backhoe bucket can be completed when the concentration is ± 10% or less.

As described above, since the mud removal time can be appropriately managed while checking the measurement data in real time, efficient mud removal construction is possible. Further, even if the soil quality of the target cohesive soil changes, the cohesive soil can be made into a homogeneous material because the demudification can be performed in an appropriate demineralization time.

Next, an arrangement example of the measurement sensor will be described with reference to FIGS. 5 to 7. FIG. 5 is a side view showing a state in which the measurement sensor is arranged in the bucket of FIG. 3 (b). 6A and 6B are top views (a) to (d) showing the arrangement positions of the measurement sensors in the storage section and the bucket of the earthen carrier of FIGS. 3A and 3B. FIG. 7 is a top view (a) to (d) showing the arrangement position of the measurement sensor when the cohesive soil stored in the steel container is demudged.

As shown in FIG. 5, the measurement sensor 20 is arranged on the back surface 12a of the bucket 12 of the backhoe 11 of FIG. 6C, and the measurement sensor 20 passes through the arm 11a of the backhoe 11 and the cable 20a extending along the boom. It is connected to the ultrasonic densitometer main body 28 installed in the operation unit 11b of the backhoe 11, and the measurement data is transmitted from the ultrasonic densitometer main body 28 to the personal computer PC (FIG. 4) wirelessly or by wire. In this way, the measuring sensor 20 and the ultrasonic densitometer main body 28 are connected by wire, and the measured values such as the water content ratio and the density are measured by the measuring sensor 20 during the demudification treatment in the cohesive soil G by the bucket 12. Can be acquired continuously. Such a measured value can be used as a representative value of the working range of mud removal by the backhoe 11. The measurement sensor 30 (FIG. 6 (d)) may be similarly arranged in the bucket 15 of the other backhoe 14 of FIG. 6 (c). Further, in the case of the steel container 40 of FIGS. 7A to 7D described later, there is also a method of attaching the RI density moisture meter to the outside of the short side or the long side or to the bucket of the backhoe.

In the present embodiment, it is preferable to acquire the measured values from one point to a plurality of points depending on the amount of the target cohesive soil and the machine used for demudification. For example hundreds ～2000M 1 to 4 points of the four corners of the soil tank when performing the operation of the backhoe the Kaidoro using bucket number m ³ with soil luck ship with soil tank ³ hundreds m ³ 1-4 point when implemented in pounds, in case of performing a solution mud several to 20 m ³ approximately Bessel and steel containers and steel water tank, making measurements of among the four corners 1-2 points Is preferable.

For example, when measuring at four points, as shown in FIG. 6A, the measurement sensors 21 to 24 are arranged at the four corners of the storage unit 10 formed of a rectangular soil tank when viewed from above the earthen carrier SP. When measuring at two points, the measurement sensors 21 and 24 are arranged at diagonally diagonal angles of the storage unit 10 as shown in FIG. 6 (b), or arranged at both corners of the long side as shown in FIG. 3 (b). Further, as shown in FIG. 6C, the measurement sensor 20 is arranged in the bucket 12 of the backhoe 11 (FIG. 5), and the measurement sensor 23 is arranged at the corner of the storage unit 10 on the side away from the backhoe 11. As shown in FIG. 6D, the measurement sensors 20 and 30 are arranged in the buckets 12 and 15 of the backhoes 11 and 14, respectively.

Further, when a steel container having a relatively small volume is used as a storage portion for cohesive soil and measurement is performed at two points, the length of the rectangular steel container 40 which is vertically long when viewed from the upper surface is as shown in FIG. 7A. The measurement sensors 25 and 26 are arranged at both corners of the side, or the measurement sensors 25 and 27 are arranged at the diagonal corners of the steel container 40 as shown in FIG. 7B. Further, when measuring at one point, the measurement sensor 25 is arranged at one corner of the steel container 40 as shown in FIG. 7 (c), and is not arranged in the steel container 40. The measurement sensor 20 is arranged in the bucket 12 of the backhoe 11 as in 7 (d).

When a plurality of backhoes are used for mud removal on a clay carrier or the like, a measurement sensor may be arranged in each bucket as shown in FIG. 5 (FIG. 6 (d)). In addition, when the measurement sensors are arranged at one point, the arrangement position is determined so that the measurement points can represent the whole, and when the measurement sensors are arranged at a plurality of points, the measured values of the respective measurement sensors are defrosted. Each placement position is determined so that the measured values in a certain range of can be represented, and the variation and convergence of each measured value can be confirmed.

Further, when the measurement is performed at a plurality of points, it can be determined that the demudification treatment is completed at the stage where the measured values at each measurement point converge and do not exceed the predetermined range within the predetermined time. In this case, the average value of the measured values at a plurality of points may be obtained, and the completion may be determined with a range of 80 to 120% (preferably 90 to 110%) of the average value as a predetermined range.

Further, the water content and density measured in the present embodiment are indexes for confirming the time until a value within a predetermined range is obtained, and do not necessarily have to be an accurate value. For example, a measured value of a densitometer. Does not need to be converted to water content. The water content ratio and wet density required for quality control may be measured separately by a predetermined test method. For example, the water content ratio may be measured based on JIS A 1203 and the wet density may be measured based on JIS A 1225.

<Measurement example>
FIG. 8 shows the results of a measurement example in which the water content ratio of the cohesive soil was measured with an ultrasonic densitometer when the cohesive soil was demudified with a backhoe bucket. In the measurement example of FIG. 8, the cohesive soil (liquid limit: 62.6 wL) was demudified in a 20 m ³ steel water tank. An ultrasonic densitometer SDM-5100 sold by Shibaura Semtech Co., Ltd. was used for the measurement. As is clear from FIG. 8, in the measured value (vertical axis) of the water content ratio, the large fluctuation at the initial stage of mixing subsided with time, and no increase or decrease in the value was observed. The time until the instantaneous measured value converges within the range of 90 to 110% of the moving average value of the measured value in the last 1 minute is about 11 minutes from the start of demudification. The measured value at 8 minutes 54 seconds exceeded 90 to 110% of the moving average, but the measured value for the subsequent 2 minutes did not exceed this range, so at this point (about 11 minutes have passed since the start of mud removal). Time) was determined to be the completion of mud removal treatment.

Although the embodiments for carrying out the present invention have been described above, the present invention is not limited to these, and various modifications can be made within the scope of the technical idea of the present invention. For example, in the present embodiment, an RI density moisture meter capable of measuring the water content ratio and density of cohesive soil may be used as a measuring instrument, but the RI density moisture meter continuously measures the water content ratio with a neutron beam moisture meter. However, the density is continuously measured by a γ-ray densitometer, and both are configured separately. An RI density moisture meter can be used to measure the water content ratio and density of cohesive soil, and a neutron ray moisture meter or a γ-ray density meter can be used to measure the water content ratio or density.

Further, when the fluctuation of the measured value such as the water content ratio of the cohesive soil by the measuring sensor is large, it is determined that the predetermined range is 80 to 120%. In this case, the average value Av tends to increase or decrease. It may be determined that there is no such thing. Alternatively, the moving average value of about 2 to 10 measured values acquired continuously is used as the measured value, and whether this measured value converges within the range of 90 to 110% of the moving average value of the measured value for 1 minute, for example. It may be judged by whether or not.

Further, in FIG. 3 and the like, the earthen carrier was berthed and the mud removal treatment was performed by the backhoe arranged on the land side. Of course.

Further, in the present embodiment, the demudification treatment of the cohesive soil is performed by the bucket and the backhoe, but the present invention is not limited to this, and the bucket and other construction machines may be used, or another treatment device is used. For example, a bucket drive device and a bucket installed on a clay carrier, a pontoon, a land yard, or the like may be used.

Further, the demudification treatment of cohesive soil in the present embodiment is performed for the purpose of making the cohesive soil mass smaller and uniform.

Further, according to the quality control method / system for cohesive soil demolition treatment of the present invention, it is possible to configure a cohesive soil demineralization treatment method / system for performing cohesive soil demud treatment. For example, such a cohesive soil demud treatment system includes a storage unit for storing cohesive soil to be dehumidified, a processing device such as a backhoe bucket for dehumidification in the storage unit, and the above-mentioned quality management system. Can be configured.

According to the present invention, when dehumidifying cohesive soil, a pre-demuding test is not required, the completion time of demudification can be determined quickly and appropriately, and the quality control of demud processing can be performed with a simple configuration. Since it can be carried out appropriately, mud removal of cohesive soil can be carried out efficiently, and the quality of the treated cohesive soil can be kept constant. The obtained homogeneous cohesive soil is preferable for quality control of the mixed material produced by adding and mixing a modifier and the like.

10 Reservoir 11, 14 Back hoe 12, 15 Bucket 13, 16 Ultrasonic densitometer 20, 30 Measurement sensor 21-27 Measurement sensor 28 Ultrasonic densitometer body 40 Steel container G Cohesive soil PC PC SP Earth carrier SM1 SM3 mobile terminal (external terminal)

Claims (12)

It is a quality control method for demudification of cohesive soil.
At least one of the water content, concentration, and density of the cohesive soil at the time of demudification was continuously measured.
A quality control method for cohesive soil demud treatment, in which it is determined that the demudification is completed when the measured values converge within a predetermined range. The average value of the measured values is calculated based on the measured values within the predetermined time before the determination.
The quality control method for cohesive soil demolition treatment according to claim 1, wherein the predetermined range is 80 to 120% of the average value. The measurement is performed at a plurality of points in a predetermined area where the mud is removed.
The quality control method for cohesive soil demolition treatment according to claim 1 or 2, wherein it is determined that the demudification is completed when the measured values at the plurality of points converge within the predetermined range. The invention according to any one of claims 1 to 3, wherein the measurement is performed at one point or a plurality of points in a predetermined area where the demudification is performed, depending on the amount of the cohesive soil and at least one of the machines used for the demudification. Quality control method for cohesive mud demolition treatment. The quality control method for cohesive soil demud treatment according to any one of claims 1 to 4, wherein the measurement is performed in the bucket when the cohesive soil is dehumidified by the bucket. A quality control system for demudification of cohesive soil
A measuring means having a measuring sensor for continuously measuring at least one of the water content, concentration, and density of the cohesive soil at the time of demudging.
A quality control system for cohesive soil demolition treatment, comprising a determination means for determining that the demudification is completed when the measured values converge within a predetermined range. A calculation means for calculating the average value of the measured values based on the measured values within a predetermined time before the determination is provided.
The quality control system for cohesive soil demolition treatment according to claim 6, wherein the predetermined range is 80 to 120% of the average value. The measurement is performed by the plurality of measurement sensors arranged at a plurality of points in a predetermined area for demudification.
The quality management system for cohesive soil demolition treatment according to claim 6 or 7, wherein the determination means determines that the demudification is completed when the measured values by the plurality of measurement sensors converge within the predetermined range. .. The cohesive soil is demudified with a bucket.
The quality control system for cohesive soil demolition treatment according to any one of claims 6 to 8, wherein the measurement sensor is arranged in the bucket. The cohesive soil at the time of demudging is stored in the storage section, and the demudification is performed in the storage section.
The quality management system for cohesive soil demolition treatment according to any one of claims 5 to 9, wherein the measurement sensor is arranged at one point or a plurality of points in the storage unit. The viscosity according to any one of claims 5 to 10, wherein the measuring sensor is arranged so as to be located in the cohesive soil at the time of demudging and located above half the depth of the cohesive soil. Quality control system for soil mud treatment. Communication means for communicating with external terminals,
A storage means for storing and registering information that identifies the external terminal is further provided.
When the determination means determines that the mud removal is completed, the communication means notifies the external terminal registered in the storage means that the mud removal is completed according to any one of claims 5 to 11. The quality control system for the described cohesive mud removal treatment.

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