JP2019152009A - Long distance force-feed method for fluid materials - Google Patents

Abstract

To provide a force-feed method for fluid materials used in underground space construction, etc. over long distances of 1,000 m or more with high safety and efficiency at low cost.SOLUTION: A flowable material supply source 14 is arranged upstream of a long-distance path L, a force-feed path is divided into a plurality of unit sections 20 (L1, L2), and an autonomous transfer system is arranged for each unit section 20. Each autonomous transfer system comprises force-feed pumps 21 (p1, p2) arranged at an upstream end and a control device. The control device comprises sensors 23 (s1, s2) that sense the arrival state of the flowable material. Each autonomous transfer system operates each force-feed pump according to the sensing result of the sensors, and force-feeds the flowable material from the upstream end to a downstream end of each unit section, and each autonomous transfer system operates sequentially to force-feed the long-distance path L.SELECTED DRAWING: Figure 1

Description

The present invention relates to a long-distance pumping method for a flowable material used in underground space construction.

The applicant of the present application has proposed a method shown in Patent Document 1 relating to a technique of pumping a fluid material used for underground space construction by a pump arranged on the ground.
In Patent Document 2, as a long-distance pumping injection method of cement-based filler, the liquid A prepared by adding a first thickener and a second thickener to cement, water, the inorganic filler, and the first solution to water. In the long-distance pumping injection method of a cement-type filler to be applied after mixing and thickening the B liquid adjusted by adding 1 thickener and the second thickener, the A liquid and the B liquid are It has been proposed that the liquid A and the liquid B are mixed and injected through a stirrer immediately before the construction part by long-distance pumping with separate pipes.

Patent Documents 3 and 4 propose a cement admixture for long-distance pumping, an injection method thereof, and the like, and in particular, a proposal has been made to realize long-distance pumping by improving a flowable material.
However, in any of these proposals, the proposal was made on the premise that the fluid material is pumped from the upstream side of the long-distance path of 1000 m or more to the downstream end with one pump.

Japanese Patent No. 4098675 JP 2009-24481 Japanese Patent No. 5773957 Japanese Patent No. 5882146

An object of the present invention is to fundamentally review the long-distance pumping method itself of a fluid material used for underground space construction, and to provide a new method capable of efficient long-distance pumping.

The present invention realizes efficient long-distance pumping by the following method in a long-distance pumping method for transferring a fluid material used for underground space construction or the like over a long-distance path of 1000 m or more.
In the present invention, as in the conventional method, the flowable material supply source is disposed upstream of the long-distance path, and the pressure feed path is provided from the upstream end to the downstream end of the long-distance path. However, the pumping path is divided into a plurality of unit sections, and an autonomous transfer system is arranged for each unit section. This autonomous transfer system includes a pump for pumping arranged at the upstream end of the unit section and a control device for controlling the operation of the pump for pumping, and the control unit preliminarily supplies the upstream end of the unit section to the upstream end of the unit section. In a state where the flowable material satisfying the set operation condition has been reached, the pump for pumping at the upstream end of the unit section is operated to send the flowable material downstream. Then, by sequentially operating the autonomous transfer system of the plurality of unit sections, the fluid material from the supply source is pumped to the downstream end of the pumping path.

The control device can be implemented as including a sensor that detects the arrival state that satisfies the operation condition, and controls the operation of the pump for pumping based on a detection result of the sensor. That is, in the autonomous transfer system, the pump for pumping is operated according to the detection result of the sensor, and the fluid material can be pumped from the upstream end to the downstream end of the unit section. By sequentially performing, the fluid material from the supply source is pumped to the downstream end of the pumping path.
More specifically, a pressure sensor that senses the pressure in the pressure feed path upstream of the pump can be employed as the sensor. Then, the pump for pumping is operated on the condition that the pressure sensor senses a high pressure equal to or higher than a preset operating pressure, and the pressure feed is met on the condition that the pressure sensor senses a low pressure equal to or lower than a preset stop pressure. By controlling the operation of the pump for pumping so as to stop the pump, the autonomous transfer systems can be operated independently and at the same time, As a result of the cooperative operation according to the movement of the conductive material, each autonomy is organically linked, and the fluid material from the source can be continuously pumped to the downstream end of the long-distance path. Is.

The present invention has been able to provide a long-distance pumping method for a flowable material capable of efficient long-distance pumping.
In the present invention, it is possible to perform long-distance pumping at a relatively small pressure with a relatively small output pump as compared with the case of performing long-distance pumping at a high pressure with a single large pump. High efficiency and efficient long-distance pumping could be realized at low cost.

Explanatory drawing of the long distance pumping method which concerns on embodiment of this invention. Explanatory drawing of the autonomous transfer system of the same long distance pumping method. The flowchart of the control apparatus of the autonomous transfer system of the same long distance pumping method.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.
(Outline of the long-distance space 10)
A long-distance space 10 shown in this embodiment is a space for shield work, and includes a vertical shaft 11 and a horizontal shaft 12. The vertical shaft 11 is a space extending downward from the ground 13 to a predetermined depth, and is generally a vertical space, but may be inclined, and in any case, the depth is obtained. It is a space formed in the ground for the purpose. The horizontal shaft 12 is a space extending from the vertical shaft 11 to a predetermined length in the horizontal direction, and is generally a horizontal space, but may be inclined, and in any case, the horizontal distance. It is a space formed in the ground for the purpose of obtaining. The horizontal shaft 12 may be extended gradually as the construction progresses. However, in the present invention, the horizontal shaft 12 is formed over a long distance L of 1000 m or more.

On the ground 13, a fluid material supply source 14 such as a hopper, a mixer truck, or a vacuum truck is disposed. The supply source 14 may be disposed in the underground space. In the example of FIG. 1, a vertical pipe 16 descends from a supply source 14 on the ground 13 and a long-distance path L is transferred by a horizontal pipe 17. The vertical pipe 16 is arranged in the shaft 11, and the horizontal pipe 17 is arranged in the horizontal shaft 12. The transfer in the vertical pipe 16 may be a natural fall or may be carried out by a pump or the like. In tunnel construction, since the vertical shaft 11 is not usually required, the long distance L is constituted by the horizontal shaft 12.

(Long-distance pumping in the horizontal shaft 12)
In shield construction, the flow of earth and sand, mortar, fluidized soil (also called soil mortar), etc. in the backfill space between the surface of the excavation mine and the segments arranged on the inner peripheral surface It is common to prevent the occurrence of a sinking accident by charging the backfilling space with a conductive material as a backfilling material. Flowable materials include various mortars (general mortar, foamed mortar, poorly blended mortar with low cement content) and fluidized soil (predetermined amount of cement, water and particle size controlled) In addition to the above-mentioned backfilling material, the use is in the long-distance space 10 such as filling in the pipe, paving in the space, spraying application, etc. Various fluid materials for civil engineering construction used in civil engineering construction can be shown.

In the long-distance pumping method according to this embodiment, the fluid material is pumped over the long-distance path L by a pump from the upstream end toward the downstream end. When pumping a long-distance path L of 1000m or more from the upstream end to the downstream end with a single pump, a high-pressure pump exceeding 0.3Mpa is required, and for pumping paths such as pipes and hoses, etc. Those that can withstand high pressure are required.
On the other hand, the long-distance pumping method according to this embodiment realizes an efficient and economical long-distance pumping using a pump with a relatively small output and a pumping path with a relatively small pressure strength. It is.

(About long distance L)
As a means for performing long-distance pumping at low cost and efficiently, in this embodiment, the long-distance path L composed of the vertical pipe 16 is divided into a plurality of unit sections, and each unit section is autonomous. A general transfer system. In FIG. 1, only two sections of the first section L1 and the second section L2 are shown as unit sections, but the number of unit sections can be increased one after another in the third and fourth sections. One unit section is suitably about 200 to 600 m, but the length of the unit section can be changed as appropriate.

(Outline of autonomous transfer system)
The autonomous transfer system includes a pump 21 for pumping (first sensor s1, second sensor s2) disposed at the upstream end of the unit section 20 (first section L1, second section L2), and control for controlling the operation thereof. A device 22 is provided. The control device 22 operates the pressure-feed pump 21 at the upstream end of the unit section to send the flowable material downstream in a state where the flowable material satisfying the preset operating condition has reached the upstream end of the unit section 20. Is.

The pump for pumping 21 (first sensor s1, second sensor s2) is not particularly limited as long as it can pump a fluid material, and various types of pumps such as a sand pump can be adopted. .
And the fluid material from the supply source 14 can be pumped to the downstream end of the long-distance path L by operating the autonomous transfer system of these unit sections 20 one by one.

In particular, the autonomous transfer system can operate autonomously. As a result, even if there is no worker in the pump 21 for pumping in each unit section 20, information transmission connecting all the pumps 21 for pumping such as wiring. Without providing means, the flowable material from the source 14 can be pumped to the downstream end of the long distance path L.

(Control device for each autonomous transfer system)
The control device 22 includes a sensor 23 (first sensor s1, second sensor s2) that senses the arrival state that satisfies the operation condition, and controls the operation of the pump 21 for pumping based on the detection result of the sensor 23. Therefore, the autonomous transfer system can pump the flowable material from the upstream end to the downstream end of the unit section 20 without being given another control signal according to the sensing result of the sensor 23.

As the sensor 23, a pressure sensor that senses the pressure in the pressure feeding path (vertical pipe 16) on the upstream side of the pressure feeding pump 21 can be applied. The sensor 23 may be disposed immediately before the pumping pump 21, but the position thereof is not particularly limited as long as it is upstream of the pressurizing portion inside the pumping pump 21. Moreover, you may arrange | position in the range which receives the influence of the pressure fluctuation by the action | operation and stop of the pumping pump 21, such as several meters upstream from the pumping pump 21.

The control device 22 operates the pumping pump 21 on condition that the sensor 23 senses a high pressure equal to or higher than a preset operating pressure. Further, the pump for pumping 21 is set to the stop state on condition that the sensor 23 detects a low pressure equal to or lower than the preset stop pressure.
For example, the operating pressure (sometimes referred to as high pressure) may be about 0.05 MPa, and the stop pressure (sometimes referred to as low pressure) may be a negative pressure of about 0 to -0.004 MPa. The pressure between the operating pressure (high pressure) and the stop pressure (low pressure) is referred to as an intermediate pressure in the following description.

(Specific examples of control)
The control in the control device 22 can be performed by various methods, and an example thereof will be described with reference to FIG.
Step 101: The sensor 23 detects the pressure in the pipe.

Step 102: The control device 22 determines whether or not the detected pressure is equal to or higher than the operating pressure (high pressure).
Step 103: When the pressure is higher than the operating pressure (high pressure), the control device 22 determines whether or not the pump for pumping 21 is in an operating state.
When the pump 21 for pressure feeding is an operation state, a process is complete | finished and the control apparatus 22 continues an operation state.

Step 104: When the pumping pump 21 is not in an operating state (when it is in a stopped state), the control device 22 is operated.

Step 105: In Step 102, when the detected pressure is lower than the operating pressure (high pressure), the control device 22 determines whether or not the detected pressure is equal to or lower than the stop pressure (low pressure).
When the pressure is higher than the stop pressure (low pressure), the process ends, and the control device 22 continues the current state (actuated state or stopped state).

Step 106: When the pressure is equal to or lower than the stop pressure (low pressure), the control device 22 determines whether or not the pumping pump 21 is in an operating state.
When the pump 21 for pressure feeding is not an operation state (in the case of a stop state), a process is complete | finished and the control apparatus 22 continues a stop state.
Step 107: When the pumping pump 21 is in an operating state, an instruction to stop the control device 22 is sent to the pumping pump 21.

As a result, once the in-pipe pressure in the sensor 23 rises above the operating pressure (high pressure), the pumping pump 21 is in an operating state, and the in-pipe pressure is pumped until the in-pipe pressure falls below the stop pressure (low pressure). The operating state of 21 continues. On the other hand, when the pressure in the pipe in the sensor 23 falls below the stop pressure (low pressure), the pump for pump 21 is stopped, and the pump for pump 21 stops until the pressure in the pipe reaches the operating pressure (high pressure) at the sensor 23. The state continues.

In other words, at the intermediate pressure, the previous state (operation state or stop state) is continued. As a result, as will be described below, the autonomous transfer system of each unit section 20 can autonomously send the flowable material from the upstream end to the downstream end of the unit section 20, and the unit sections 20 of these long distance paths L. Each autonomous transfer system of the system operates sequentially. As a result, the flowable material from the supply source 14 is sequentially pumped to the downstream end of the long distance path L.

In order to prevent malfunction due to primary high pressure or low pressure due to unexpected pulsation, etc., detection of operating pressure (high pressure) or stop pressure (low pressure) is detected for a predetermined time (less than 1 second or about 2 or 3 seconds) (Several seconds), the pumping pump 21 may be changed to an operating state or a stopped state as sensing of the operating pressure (high pressure) or the stop pressure (low pressure).

Further, the manual input unit 25 may be connected to the control device 22 or directly provided on the pumping pump 21 so that the operator can switch between operation and stoppage. Further, it does not prevent the remote input means from being used together so that all the pumps 21 for pumping can be stopped or operated from the ground or the like.

(Specific process of long-distance pumping method)
Specific steps of the long-distance pumping method will be described with reference to Table 1.

(Process 0)
Process 0 is a state before the start of the conveyance work of fluid material. In this state, the flowable material is in the supply source 14 on the ground 13, and there is no flowable material in the vertical pipe 16 and the horizontal pipe 17 (first section L1, second section L2). The pump 21 (the first pump p1 and the second pump p2 in this example) are stopped, and the first sensor s1 and the second sensor s2 detect the intermediate pressure.

(Process 1)
Step 1 is a state in which the transfer operation of the flowable material has started. In this state, the fluid material is sent through the shaft 11 and reaches the first sensor s1. Immediately after this arrival, the first pump for pumping p1 has not been operated yet, and the pressure increases as the fluid material is fed, and the first sensor s1 detects the high pressure. By detecting this high pressure, the first pump for pumping p1 is activated to start pumping the flowable material.
Since the fluid material has not reached the second section L2 at the beginning of the pressure feeding, the second sensor s2 is in a state of detecting the intermediate pressure, and the second pressure feeding pump p2 is stopped.
In addition, at the start stage of the work, the worker may operate the first pumping pump p1 by the manual input unit 25 also for safety confirmation.

(Process 2)
Step 2 is a state in which the fluid material has reached the second sensor s2. In the stage immediately after this arrival, the second pump for pumping p2 has not been operated yet, and the pressure increases as the fluid material is fed, and the second sensor s2 detects the high pressure. By this high pressure detection, the second pump for pumping p2 is activated to start pumping the flowable material.

As long as the supply of the flowable material from the supply source 14 is continued, the flowable material continues to be fed into the first section L1 by the first pump for pumping p1, but the operation of the first pump for pumping p1 is started. Accordingly, the pressure in the pipe where the first sensor s1 is located decreases from a high pressure to an intermediate pressure, but the operating state of the first pump for pump p1 continues.

(Process 3)
Step 3 is a state in which the flow of the flowable material continues smoothly. As long as the supply of the flowable material from the supply source 14 is continued, the flowable material continues to be fed into the first section L1 and the second section L2 by the first pumping pump p1 and the second pumping pump p2. . With the operation of the first pump for pumping p1 and the second pump for pumping p2, the pipe pressure at which the first sensor s1 and the second sensor s2 are located decreases from a high pressure to an intermediate pressure. The operating state of the pump for pressure p2 continues.

As described above, the autonomous transfer system of all the unit sections 20 (the first section L1 and the second section L2) operates autonomously and sequentially so that the fluid material is fed from the base end to the tip end of the long distance path L. Goed to.

(Process 4)
Step 4 is a state where the supply of the flowable material from the supply source 14 is stopped. The supply stop occurs, for example, when the flowable material in the hopper is emptied or when the tank of the vacuum vehicle is emptied and the line is switched to the next vacuum vehicle.
When the supply of the flowable material from the supply source 14 is stopped, the flowable material is eliminated from the inside of the vertical pipe 16. On the other hand, since the operation of the first pump for pumping p1 continues, the pipe pressure in the first sensor s1 becomes a low pressure state such as a negative pressure, and the first sensor s1 senses a low pressure.
By detecting this low pressure, the first pump for pumping p1 is stopped, but the fluid material is present in the first section L1, and the second sensor s2 continues to detect the intermediate pressure, The pump for pumping p2 maintains the operating state.

(Process 5)
In step 5, the supply of the flowable material from the supply source 14 is stopped, and further, the first pumping pump p1 is stopped, but the operation of the second pumping pump p2 is continued, so that the inside of the first section L1. Is in a reduced state, such as the disappearance of fluid material. On the other hand, since the operation of the second pressure-feeding pump p2 continues, the pipe pressure in the second sensor s2 becomes a low pressure state such as a negative pressure, and the second sensor s2 senses a low pressure.

Although the second pump for pumping p2 is stopped by this low pressure sensing, a fluid material is present inside the second section L2.
In addition, when more sections, such as the third section, are set, the flowable material in the unit section 20 is sequentially decreased, and the most distal unit section 20 is the state of the second section L2 in this example. It becomes.

(Step 6)
Step 6 is a state in which the transfer operation of the flowable material is resumed. In this state, the fluid material is sent through the shaft 11 and reaches the first sensor s1. Immediately after this arrival, the first pump for pumping p1 has not been operated yet, and the pressure increases as the fluid material is fed, and the first sensor s1 detects the high pressure. By detecting this high pressure, the first pump for pumping p1 is activated to start pumping the flowable material.
Since the fluid material has not reached the second section L2 at the beginning of the pumping, the second sensor s2 is in the state of detecting the intermediate pressure, the second pumping pump p2 is stopped, and the second section The fluid material before resumption remains in L2.

(Return to step 2)
After the fluid material that has been pumped again reaches the second sensor s2, the state is the same as in step 2, and the pumps 21 for pumping in all the unit sections 20 are operated to feed the fluid material.
Furthermore, by continuing supply of fluid material, it transfers to the process 3 and conveyance of fluid material is continued.

(Step 7)
After step 7, the fluid material in the pump 21 for pumping (in this example, the first section L1 and the second section L2) is discharged from the tip of the long-distance path L, for example, the transporting operation of the fluid material is completed. It is a process that ends.

First, in carrying out step 7, an air supply source 26 such as a compressor is connected to the base end of the vertical pipe 16 or the horizontal pipe 17. High pressure air is introduced from the air supply source 26 in place of supplying the fluid material.
By introducing the high-pressure air, all the sensors 23 (first sensor s1, second sensor s2) sequentially detect high pressure, and regardless of the working state, all the pumps 21 for pumping (first pumps for pump p1, The second pumping pump p2) is sequentially activated, and the fluid material is discharged from the tip of the long distance path L from all the unit sections 20 (first section L1, second section L2).
Although not shown in Table 1, when the introduction of high-pressure air is stopped, the first sensor s1 and the second sensor s2 may detect the detection of the intermediate pressure. Similarly, the operating states of the first pressure-feed pump p1 and the second pressure-feed pump p2 are continued.

(Process 8)
Step 8 is a step of cleaning the inside of the unit section 20 (first section L1, second section L2). This step is desirably performed subsequent to step 7.

Step 8 is performed after the introduction of high-pressure air from the air supply source 26 is temporarily stopped. As a result, the pipe pressure stops, all the sensors 23 (first sensor s1, second sensor s2) sequentially detect the intermediate pressure, and all the pressure pumps 21 (first pressure pump p1, second pressure pump). p2) is stopped.
In this state, a cleaning water supply source 27 such as a water tank or a water pipe is connected to the base end of the vertical pipe 16 or the horizontal pipe 17, and the cleaning water is introduced from the cleaning water supply source 27 into the unit section 20. Since only the introduction of the cleaning water from the cleaning water supply source 27 does not increase the pressure, all the sensors 23 (the first sensor s1 and the second sensor s2) maintain the state in which the intermediate pressure is detected, and all the pumps 21 for pressure feeding. (The first pump for pumping p1 and the second pump for pumping p2) maintain the stopped state.

(Step 9)
Step 9 restarts the introduction of high-pressure air from the air supply source 26 after the completion of the washing water. By introducing this high-pressure air, all the sensors 23 (first sensor s1, second sensor s2) sequentially detect high pressure, and all the pressure pumps 21 (first pressure pump p1, second pressure pump p2). Regardless of the operation state, the operation state is sequentially changed, and the cleaning water is supplied to all the unit sections 20 (first section L1, second section L2) and discharged from the tip of the long distance path L.

Although not shown in Table 1, when the introduction of high-pressure air is stopped, the first sensor s1 and the second sensor s2 may detect an intermediate pressure. In addition, the operating states of the first pressure-feed pump p1 and the second pressure-feed pump p2 continue.

(Process 10)
Step 10 is a step in which the introduction of high-pressure air is stopped, and the operations of all the pumps 21 for pressure feeding (first pressure-feeding pump p1 and second pressure-feeding pump p2) are stopped. As described above, if the introduction of high-pressure air is stopped, the first pressure-feeding pump p1 and the second pressure-feeding pump p2 are not stopped only by being lowered to the intermediate pressure. Therefore, by closing a valve (not shown) provided in the vertical pipe 16 to shut off the pipe connected to the first pressure pump p1, the pipe pressure at the position where the first pressure pump p1 is provided. Falls to a low pressure, and the first sensor s1 stops. As the first sensor s1 stops, the pressure in the pipe in the first section L1 also decreases and the second sensor s2 detects a low pressure, whereby the second pump for pumping p2 stops.

Instead of shutting off the pipe, the operator also operates the manual input unit 25 such as switching off the first pressure-feed pump p1 and the second pressure-feed pump p2 for the final inspection. The pumping pump p1 and the second pumping pump p2 may be stopped.

(Advantages of the long-distance pumping method according to the embodiment)
In the long-distance pumping method according to this embodiment, a plurality of pumps are used, but the plurality of pumps for pumping 21 are independently operated by the autonomous transfer system, and the flowable material Since each of them operates in conjunction with the moving state, the fluid material can be pumped from the proximal end to the distal end of the long-distance path L even if no operator is attached to all the pumps 21 for pumping.
Therefore, long-distance pumping can be carried out smoothly without greatly increasing the number of workers.

As for the apparatus surface, in the long-distance pumping method according to this embodiment, a relatively small sand pump with a maximum pressure of 0.8 Mpa is adopted as the pump 21 for pumping capable of pumping about 500 m. By using four sand pumps and continuously providing four autonomous transfer systems, long-distance pumping of about 2000 m can be performed. In addition, it is only necessary to use a relatively small pressure strength, and it is sufficient to use a steel pipe having a wall thickness of 4.5 mm and a weight per unit meter of 12.2 kg / m.

On the other hand, when long-distance pumping is performed with a single pump, it is necessary to use a relatively large special pump with a maximum pressure of 5.5 Mpa as a pump for pumping capable of pumping about 2000 m or more. Arise. A relatively large pressure strength is required for the pressure feed path used in conjunction with the adoption of this special pump, and it is necessary to use a steel pipe having a thickness of 7.1 mm and a weight per unit meter of 18.8 kg / m. Therefore, the total equipment and operation costs are much smaller in the long-distance pumping method according to this embodiment than in the case where long-distance pumping is performed with one pump.

In particular, it is difficult for the pump to completely suppress pulsation. This pulsation tends to increase as the maximum pressure of the pump increases regardless of the type of pump. Since this pulsation gives a large impact to the piping, a large impact is applied to the piping as the maximum pressure of the pump used increases. From this point as well, the long-distance pumping method according to this embodiment Even when a pipe having a relatively small pressure strength is employed, sufficient durability is exhibited. Moreover, the greater the pressure of the fluid material that is pumped, the greater the impact on the occurrence of an accident.

Therefore, in the long-distance pumping method according to this embodiment, it is possible to provide an efficient pumping method that shows high safety at a low cost.

L Long-distance path L1 First section L2 Second section p1 First pumping pump p2 Second pumping pump s1 First sensor s2 Second sensor 10 Long-distance underground space 11 Vertical shaft 12 Horizontal shaft 13 Ground 14 Supply source 16 Vertical pipe 17 Horizontal pipe 20 Unit section 21 Pump 22 for feeding 22 Control device 23 Sensor 25 Manual input section 26 Air supply source 27 Washing water supply source

Claims (9)

In the long-distance pumping method of transferring the flowable material used for underground space construction over a long-distance path of 1000 m or more,
Dividing the long distance route into a plurality of unit sections, and arranging an autonomous transfer system for each unit section,
The autonomous transfer system includes a pump for pumping arranged at the upstream end of the unit section, and a control device for controlling the operation of the pump for pumping,
In the state where the flowable material satisfying the preset operation condition is reached at the upstream end of the unit section by the control device, the pumping pump at the upstream end of the unit section is operated to To send downstream,
A long-distance pumping of the flowable material, wherein the autonomous transfer system of the plurality of unit sections is sequentially operated to pump the flowable material from the supply source to the downstream end of the long-distance path. Method. The control device includes a sensor that detects the arrival state that satisfies the operation condition, and controls the operation of the pump for pumping based on a detection result of the sensor,
The autonomous transfer system is configured such that the pump for pumping is operated according to a detection result of the sensor, and the flowable material can be pumped from the upstream end to the downstream end of the unit section. The long-distance pumping method of Claim 1 of an electroconductive material. The sensor is a pressure sensor that senses a pressure in the long-distance path upstream of the pump, and the pressure-feeding pump is controlled on condition that the pressure sensor senses a high pressure that is higher than a preset operating pressure. The operation of the pump for pumping is controlled so that the pump for pumping is stopped on the condition that the pump is activated and the pressure sensor senses a low pressure equal to or lower than a preset stop pressure. Long-distance pumping method for fluid materials. The pump for pumping at the upstream end of the unit section with the flowable material remaining in the unit section in a state where the flowable material that satisfies the operating condition no longer reaches the upstream end of the unit section. Is stopped,
The supply of the flowable material is resumed from the stopped state, and the unit section is set to the feeding state in a state where the flowable material has reached the upstream end of the unit section. 4. A long-distance pumping method for a fluid material according to any one of 3 above. With the flowable material no longer reaching the upstream end of the unit section, leaving the flowable material in the unit section, the pump for pumping at the upstream end of the unit section is stopped,
By supplying pressurized air to the upstream end of the unit section and setting the pump for feeding at the upstream end of the unit section to the operating state, the flowable material in the unit section is sent to the downstream side. The long distance pumping method of the fluid material according to any one of claims 1 to 3, wherein the unit section is emptied. In the state where the unit section is empty, the cleaning liquid is introduced into the upstream end of the unit section, and the pump for pumping at the upstream end of the unit section is set to the operating state, so that the unit section includes After the introduced cleaning solution is sent to the downstream side to clean the unit section,
By stopping the introduction of the cleaning liquid, supplying only pressurized air to the upstream end of the unit section, and setting the pump for pumping at the upstream end of the unit section to the operating state, the unit section in the unit section 6. The long-distance pumping method for flowable material according to claim 5, wherein the cleaning liquid is sent downstream to empty the unit section. The long-distance route is a route in a long-distance space that is a target of at least one type of construction selected from shield construction, tunnel construction, and underground cavity backfill construction,
The fluid material is a fluidized soil containing construction sludge and cement,
The method for long-distance pumping of a fluid material according to any one of claims 1 to 6, wherein the underground construction is performed by conveying the fluidized soil from the open end of the long-distance space to the inside. In a long-distance pressure feeding system that transports fluid materials used in underground space construction over a long-distance path of 1000 m or more,
An autonomous transfer system arranged for each unit section of the long-distance path divided into a plurality of unit sections,
The autonomous transfer system includes a pump for pumping arranged at the upstream end of the unit section, and a control device for controlling the operation of the pump for pumping,
Each of the autonomous transfer systems includes a sensor that senses a reaching state in which the flowable material that satisfies a preset operation condition reaches the upstream end of the unit section by the control device,
The control device is configured to send the flowable material downstream by operating the pump for pumping at the upstream end of the unit section in the state of arrival sensor state,
A long-distance pumping of the flowable material, wherein the autonomous transfer system of the plurality of unit sections is sequentially operated to pump the flowable material from the supply source to the downstream end of the long-distance path. Method. The control device includes a sensor that detects the arrival state that satisfies the operation condition, and controls the operation of the pump for pumping based on a detection result of the sensor,
The autonomous transfer system is configured such that the pump for pumping is operated according to a detection result of the sensor, and the flowable material can be pumped from the upstream end to the downstream end of the unit section. The long-distance pumping method of Claim 8 of a property material.

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