JP2024006770A - Filling detection system and filling detection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a filling detection system capable of confirming a filling status with simple constitution.

SOLUTION: There is provided a filling detection system 1 for detecting a filling status inside an underground cavity 90. The filling detection system 1 includes a plurality of pipes 21 to 23 for filling including at least a first pipe 21 for filling and a second pipe 22 for filling the inside of the underground cavity 90 with a filler M, the second pipe 22 for filling includes a discharge port 223a for discharging the filler M and an air discharge port 222a arranged on a side where the filler M is filled by the first pipe 21 for filling before the discharge port 223a, and the second pipe 22 for filling is mounted with a bursting valve 224 as a temporarily blocking member for temporarily blocking the discharge port 223a.

SELECTED DRAWING: Figure 1

COPYRIGHT: (C)2024,JPO&INPIT

Description

The present invention relates to a filling detection system and filling detection method for detecting whether or not the inside of an underground cavity is filled, for example, when filling an underground cavity such as a buried pipe.

BACKGROUND ART Conventionally, work has been carried out to fill the inside of an underground cavity containing a buried pipe or the like with a filling material such as mortar. During construction work to fill such underground cavities, the filling status within the cavity was confirmed by detecting the surface height of the filling material using water level detection tape or a push rod.

Furthermore, as another method, for example, Patent Document 1 discloses that a sensor harness is inserted through a plurality of measurement holes, and a plurality of sensors are connected to the wire harness, arranged at vertical intervals in each sensor harness. A verification device is disclosed. With such a configuration, this confirmation device can detect the filling status at multiple locations spaced apart in the horizontal direction or the like using the multiple sensor harnesses.

Japanese Patent Application Publication No. 2018-131752

However, the conventional confirmation device described in Patent Document 1 uses multiple sensor harnesses and multiple sensors, and also requires wiring, making the overall system configuration complex and expensive. Ta.

Therefore, an object of the present invention is to provide a filling detection system that can check the filling status with a simple configuration.

In order to achieve the above object, the filling detection system of the present invention is a filling detection system for detecting the filling situation inside an underground cavity, and includes at least a first step for casting a filling material inside the underground cavity. A plurality of filling pipes including a first filling pipe and a second filling pipe are provided, and the second filling pipe has a discharge port through which the filler is discharged, and a discharge port that is closer to the first fill pipe than the discharge port. an air outlet and an air intake port disposed on the side where the filler material was first cast by the second filling pipe, and the second filling pipe has the discharge port temporarily blocked. A temporary closure member is attached.

Further, the filling detection method of the present invention is a filling detection method for detecting the filling status inside an underground cavity, and includes the steps of: placing a filling material inside the underground cavity through a first filling pipe; discharging air into the underground space through an air discharge port provided in a second filling pipe; blocking the air discharge port with the filler; and stopping the discharge of air through the air discharge port. and a step of detecting that.

As described above, the filling detection system of the present invention includes a plurality of filling pipes including the first filling pipe and the second filling pipe, and the second filling pipe is connected to the discharge pipe from which the filler is discharged. an air outlet, and an air outlet disposed on the side where the filler was placed earlier than the discharge port by the first filling pipe, and the second filling pipe has a temporary discharge port. A temporary closing member is attached to close the area. This configuration provides a filling detection system that can check the filling status with a simple configuration. Furthermore, even if the underground space is not closed and is open, the filling status of each location can be detected.

Further, the filling detection method of the present invention includes the step of placing the filling material inside the underground cavity through the first filling pipe, and the step of pouring air into the underground space through the air outlet provided in the second filling pipe. The method includes a step of discharging the air, a step of closing the air discharge port with a filler material, and a step of detecting that the discharge of air through the air discharge port has stopped. Due to this configuration, the filling detection method allows checking the filling status through simple steps. Furthermore, even if the underground space is not closed and is open, the filling status of each location can be detected.

FIG. 2 is a longitudinal sectional view illustrating the overall configuration of an underground cavity including a filling detection system. FIG. 2 is a plan view illustrating the overall configuration of an underground cavity including a filling detection system. FIG. 2 is an explanatory diagram illustrating the configuration of the tip portion of the filling detection system according to the first embodiment. (a) is a longitudinal sectional view, and (b) is a plan view. FIG. 2 is an explanatory diagram illustrating the configuration of the proximal end portion of the filling detection system according to the first embodiment. (a) is a longitudinal sectional view, and (b) is a plan view. FIG. 2 is an operational diagram of the filling detection system according to the first embodiment. (a) shows the state in which preparation is completed, and (b) shows the state in which air is being exhausted through the air outlet. FIG. 2 is an operational diagram of the filling detection system according to the first embodiment. (c) shows a state in which the air discharge port is blocked by the filler, and (d) shows a state in which the filler is placed through the discharge port of the next filling pipe.

Embodiments of the present invention will be described below with reference to the drawings. In the following, a filling detection system (1) that casts a filling material from the side far from the plant, that is, from the back side to the front side, will be described. However, by reversing the positions of the air exhaust port and the discharge port, it is of course possible to cast the filler from the side closer to the plant, that is, from the front side to the back side.

(composition)
First, the overall configuration including an underground cavity 90 provided with the filling detection system 1 of the present invention will be explained using FIGS. 1 and 2. As shown in FIGS. 1 and 2, in this embodiment, when the inside of the underground cavity 90 is filled with a highly fluid filler M such as air mortar, as will be described later, it is checked whether cavities are formed or not. A filling detection system 1 for detecting filling status is constructed.

The filling detection system 1 includes filling pipes 21 to 23 for placing a highly fluid filling material M such as air mortar inside the underground cavity 90. These filling pipes 21 to 23 are pipes such as PVC pipes that are inserted into the underground cavity 90 in plural numbers depending on the amount of filler M that can be cast in one day (determined by plant capacity, etc.). Here, an example will be described in which three filling pipes 21 to 23 are used. However, the number of PVC pipes is not limited to three, and may be at least two, or may be four or more.

Among the filling pipes 21 to 23, the two filling pipes 22 and 23 used for pouring on and after the second day are provided with tip structures 22A and 23A at their distal ends, and their proximal ends are Base end structures 22B and 23B are configured. Note that a normal straight pipe can be used as the longest filling pipe 21 used when pouring on the first day.

The tip structure 22A (23A) is connected to an injection tube 220 having the same diameter as the injection tube (PVC pipe) (220) of the general part and the tip of the injection tube 220, as shown in FIGS. 3(a) and 3(b). The increaser joint 221 connected to the increaser joint 221, the detection thin tube 222 connected to the tip of the increaser joint 221, the branch joint 223 connected to the proximal end of the injection tube 220, and the other discharge port 223a of the branch joint 223 are closed. The burst valve 224 serves as a temporary closure member.

The injection pipe 220 is a cylindrical member such as a PVC pipe. The length of the injection tube 220 in this embodiment is such that after the air outlet 222a is closed with the filler M, the length is between the air outlet 222a at the tip of the detection thin tube 222 and the outlet 223a of the branch joint 223. Even if the filler M remaining in the storage tank of the filler M and in the filling pipe 21 (22) is placed inside the underground cavity 90, there is a margin distance L1 that does not block the discharge opening. provided.

The increaser joint 221 is also called a different diameter socket (joint), and is used when connecting pipes having different diameters. The increaser joint 221 has a tapered portion that linearly decreases (expands) in diameter, so that the distal end side of the injection tube 220, which is the large diameter side, and the proximal end side of the detection thin tube 222, which is the small diameter side. Connects smoothly.

The branch joint 223 of this embodiment is a member such as a PVC pipe that branches into two, and is provided with a discharge port 223a at the top for discharging a filler M such as air mortar. A rupture valve 24 serving as a temporary closure member is installed at the discharge port 223a of the branch joint 223 in this embodiment, and is ruptured (opened) upon receiving the injection pressure of the filler M. Note that there may be one discharge port 223a, or there may be two or more discharge ports 223a.

The temporary closing member can be, for example, a bursting valve 24 in which a film or rubber cap is tightly attached to the discharge port 223a, but the structure is such that it can prevent the leakage of air for detection, and the pressure of the filler M can be prevented. The specific structure does not matter as long as it does not disrupt the flow by tearing or falling off.

On the other hand, as shown in FIGS. 4(a) and 4(b), the base end structure 22B (23B) includes an injection tube 220 having the same diameter as the injection tube (PVC pipe) (220) of the general part, and An increaser joint 221 connected to the base end, an air hose 227 connected to the base end of the increaser joint 221, a branch joint 225 connected to the tip of the injection pipe 220, and a balloon branching vertically from the branch joint 225. It consists of a mounting pipe 226.

The increaser joint 221 has a tapered part that linearly reduces (increases) its diameter, so it smoothly connects the base end of the injection pipe 220, which is the large diameter side, and the distal end of the air hose 227, which is the small diameter side. Connected. Note that, as described later, the increaser joint 221 is removed when pouring the filler M, and a mortar hose (40) is connected instead.

The branch joint 225 of this embodiment is a T-shaped branch member such as a PVC pipe, and a balloon attachment pipe 226 for attaching a balloon (30) is protruded from the upper part. A rubber balloon 30 is attached to the balloon attachment tube 226 of this embodiment as a detection means during use.

Note that the detection means does not have to be the balloon 30, but may be a pressure measuring device, as long as it can detect pressure changes inside the filling pipes 21 to 23, or the balloon 30 and the pressure measuring device can be used together. You can also.

Depending on the construction step, the base end structure 22B (23B) of the filling detection system 1 of this embodiment is connected to an air hose 227 via the increaser joint 221 described above, or a mortar which is a conveying hose for the filler M. A hose 40 can be connected.

Here, in this embodiment, when the air hose 227 is connected to the base end structure 22B, it is preferable that an air supply device (compressor; not shown) is connected to the base end side of the air hose 227. Therefore, by turning on the air supply device, air can be sent into the second filling pipe 22 to increase the internal pressure.

Then, as will be described later, the balloon 30 will inflate a little when the air outlet 222a at the most extreme end of the tip structure 22A is open, and the balloon 30 will inflate greatly when the air outlet 222a is closed. ing. Note that it is preferable that the bursting valve 224 as a temporary closing member not burst (fall off) even under pressure when the balloon 30 is greatly inflated.

(effect)
Next, the operation of the filling detection system 1 of this example will be explained using FIGS. 5(a), (b), and FIGS. 6(c) and (d).

First, as shown in FIG. 5(a), three filling pipes 21 to 23 are installed inside the underground cavity 90. In this state, the air supply device is not operating and the air outlet 222a is open. The balloon 30 is in a deflated state.

Next, as shown in FIG. 5(b), an air hose 227 is connected to the base end side of the base end structure 22B, and the air supply device is operated to send air. Since the air outlet 222a at the tip is open, the internal pressure inside the pipe increases a little, and the balloon 30 is in a slightly inflated state.

Next, the filler M is cast from the first filling pipe 21 which is located one in front (here, extends to the most distal end side) (see FIG. 2). Then, the filling material M reaches close to the tip structure 22A of the second filling pipe 22 while filling the underground cavity 90.

Then, as shown in FIG. 6(c), the filler M reaches the air outlet 222a at the most distal end of the tip structure 22A of the second filling pipe 22, and blocks this. When the air outlet 222a is closed in this way, the internal pressure within the pipe becomes high and the balloon 30 becomes greatly inflated.

Then, when the operator visually observes that the balloon 30 has expanded to a large extent on the proximal end side, the worker stops placing the filler M. Specifically, after stopping the supply of the filler M, it is confirmed that all the filler M in the first filling pipe 21 has been discharged, and then the operation of the pump is stopped.

After that, as shown in FIG. 6(d), after reconnecting the mortar hose 40 instead of the air hose 227 to the base end side of the base end structure 22B, this time, the filling material is passed through the second filling pipe 22. It will be filled with M. Then, upon receiving the filler M, the rupture valve 224 of the tip structure 22A bursts and falls off. After that, this time, the work is repeated, such as detection by the next third filling pipe 23 and casting of the filler M through the third filling pipe 23 after setup change.

(effect)
Next, the effects of the filling detection system 1 and detection method of this embodiment will be listed and explained.

(1) As described above, the filling detection system 1 of this embodiment is a filling detection system 1 for detecting the filling situation inside the underground cavity 90. This filling detection system 1 includes a plurality of filling pipes 21 to 23 including at least a first filling pipe 21 and a second filling pipe 22 for placing a filling material M inside the underground cavity 90. The second filling pipe 22 is arranged at the discharge port 223a through which the filler M is discharged, and on the side where the filler M is placed earlier by the first filling pipe 21 than the discharge port 223a. A rupture valve 224 is attached to the second filling pipe 22 as a temporary closing member that temporarily closes the discharge port 223a. With such a configuration, the filling detection system 1 can confirm the filling status with a simple configuration. In particular, the present invention is characterized in that even if the underground space 90 is not closed and is an open space, the filling status of each position can be detected.

In other words, if air is sent through the second filling pipe 22 itself (that is, if the internal pressure is maintained at a predetermined value), the blockage of the air outlet 222a at the tip can be detected by detecting a change in the internal pressure. Can be detected. Furthermore, this second filling pipe 22 can also be used when pouring the filler M later.

(2) Furthermore, the bursting valve 224 as a temporary blocking member is configured to receive the filler M that has reached the discharge port 223a through the second filling pipe 22 and fall off from the discharge port 223a. After being used for detection, it can be reused as a filling pipe without requiring any special work.

That is, the rupture valve 224 blocking the discharge port 223a needs to be opened when filling with the filler M, but since it is located deep inside the underground cavity 90, there is no means to open it. Therefore, it is convenient if the structure is such that the filling material M reaches the filling material M and bursts and falls off due to the pressure of the filling material M itself.

(3) Furthermore, since an air supply device is further connected to the base end side of the base end structure 22B of the second filling piping 22, by continuing to stably send air with the air supply device, the piping The internal pressure (internal pressure) can be maintained at a predetermined value, making it easier to detect pressure changes when the air outlet 222a at the tip is closed.

(4) Furthermore, since the base end structure 22B of the second filling pipe 22 is further installed with a balloon 30 as a detection means for detecting internal pressure changes, the air outlet 222a at the tip is This makes it easier to detect blockages at a glance.

(5) Furthermore, between the air outlet 222a and the discharge port 223a, after the air outlet 222a is closed, the filler M remaining in the mixer and the filling pipe 22 is removed. Even if the filling material M is placed inside the underground cavity 90, there is a sufficient distance to prevent the discharge port 223a from being blocked, thereby eliminating the need to discard the filler M after the air discharge port 222a is closed. In other words, even if the remaining filler M is placed, the next discharge port 223a will not be blocked.

(6) Moreover, if a plurality of discharge ports 223a are provided, the inside of the underground cavity 90 can be filled more reliably and more evenly.

(7) The filling detection method of this embodiment is a filling detection method for detecting the filling situation inside the underground cavity 90, and includes the following steps.
- Step of placing the filler M inside the underground cavity 90 through the first filling pipe 21 - Step of discharging air into the underground cavity 90 through the air outlet 222a provided in the second filling pipe 22 - A step of closing the air outlet 222a with the filler M. A step of detecting that the air discharge through the air outlet 222a has stopped. By providing each of these steps, the filling status can be checked by a simple process (step). This is a filling detection method that can be confirmed. In particular, a feature is that even if the underground space 90 is not closed and is an open space, the filling status of each position can be detected.

(8) Furthermore, by further providing a step of preventing air from being discharged through the discharge port 223a provided in the second filling pipe 22, air is not discharged even if the discharge port 223a is provided, and the pipe The internal pressure can be increased, and blockage of the air outlet 222a can be easily detected.

(9) Furthermore, in order to further include the step of placing the filler M through the discharge port 223a provided in the second filling pipe 22, the temporary closing member is ruptured and falls off due to pressure after being used for detection. This allows the second filling pipe 22 to be reused for filling.

Although the embodiments of the present invention have been described above in detail with reference to the drawings, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention may be made to the present invention. included.

1: Filling detection system 21: First filling pipe 22: Second filling pipe 23: Third filling pipe 22A, 23A: Tip structure 220: Injection pipe 221: Increaser joint 222: Detection thin tube 222a : Air outlet 223: Branch joint 223a: Discharge port 224: Burst valves 22B, 23B: Base end structure 225: Branch joint 226: Balloon attachment pipe 227: Air hose 30: Balloon (detection means)
40: Mortar hose L1: Margin distance M: Filler material

Claims (9)

A filling detection system for detecting filling status inside an underground cavity,
A plurality of filling pipes including at least a first filling pipe and a second filling pipe for placing a filling material inside the underground cavity,
The second filling pipe includes a discharge port through which the filler is discharged, and an air exhaust disposed on the side where the filler is placed earlier than the discharge port by the first filling pipe. comprising an exit;
A filling detection system, wherein a temporary closing member for temporarily closing the discharge port is attached to the second filling pipe. The filling device according to claim 1, wherein the temporary closing member is configured to fall off or burst from the discharge port upon receiving the filler that has reached the discharge port through the second filling pipe. detection system. The filling detection system according to claim 2, further comprising an air supply device connected to the base end of the second filling pipe. 4. The filling detection system according to claim 3, further comprising detecting means for detecting internal pressure changes near the base end of the second filling pipe. Between the air discharge port and the discharge port, after the air discharge port is closed, the filler remaining in the filler mixer and the filling pipe is removed into the underground cavity. 5. The filling detection system according to claim 4, wherein a sufficient distance is provided to prevent the discharge port from being blocked even when the discharge port is poured. The filling detection system according to claim 5, comprising a plurality of said discharge ports. A filling detection method for detecting a filling situation inside an underground cavity, the method comprising:
placing a filler inside the underground cavity through a first filler pipe;
discharging air into the underground cavity through an air outlet provided in the second filling pipe;
blocking the air outlet with the filler;
A filling detection method comprising the step of detecting that the discharge of air through the air discharge port has stopped. 8. The filling detection method according to claim 7, further comprising the step of preventing air from being discharged through a discharge port provided in the second filling pipe. The filling detection method according to claim 8, further comprising the step of placing a filling material through a discharge port provided in the second filling pipe.

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