Simple cleaning method for sediment outside long-distance rock jacking pipe

Abstract

A simple cleaning method for sediments outside a long-distance rock jacking pipe comprises the steps that firstly, a deslagging system is arranged on a pipeline body, and secondly, the deslagging system is started regularly to conduct deslagging operation in the jacking process of the jacking pipe. 3, in the pipe jacking process, when the resistance of the outer wall of the pipeline rises, a slag discharging system is started to conduct irregular slag discharging operation; and 4, in the pipe jacking process, when the pipeline is deformed or locked when encountering resistance, a deslagging system is started to conduct emergency deslagging operation. According to the method, monitoring data of the pipe jacking machine, a deslagging circulating system of the pipe jacking machine and a grouting system are utilized, and the full-length deslagging capacity of the pipeline is achieved by additionally arranging valves; sediments formed by crushing of the pipe push bench can be removed, and sediments formed by pipeline friction can also be removed.

Description

Technical Field

[0001] The invention relates to the technical field of rock jacking pipe and pipeline construction, in particular to a simple method for cleaning sediment outside a long-distance rock jacking pipe. Background Art

[0002] During the long-distance rock pipe jacking operation, the small particles crushed by the rock pipe jacking machine and the loose small fragments caused by friction around the pipe are easily deposited on the lower part of the pipe. After a long period of accumulation, it is easy to cause the pipe jacking force to increase during the jacking process, resulting in pipe deformation and pipe locking, leading to the failure of the pipe jacking project. This phenomenon is particularly common in high-strength and long-distance rock pipe jacking. Summary of the invention

[0003] The present invention aims to propose an operation method by utilizing the slag circulation system of the pipe jacking machine and the grouting system of the pipe jacking machine to complete the slag cleaning work of the over-excavation annular gap outside the pipeline, thereby reducing the engineering risk and ensuring the smooth implementation of the project.

[0004] In order to achieve the above object, the present invention is achieved in the following ways: A simple method for cleaning the sediment outside a long-distance rock jacking pipe comprises: Step 1: Set up a slag discharge system on the pipeline body. Step 2: During the pipe jacking process, the slag discharge system is opened regularly to discharge slag; Step 3: During the pipe jacking process, when the resistance of the outer wall of the pipe increases, the slag discharge system is turned on to perform irregular slag discharge operations; Step 4: During the pipe jacking process, when the pipeline encounters resistance, deformation or locking, open the slag discharge system for emergency slag discharge operations.

[0005] The above-mentioned simple method for cleaning the sediment outside the long-distance rock jacking pipe, the slag discharge system includes a valve opened on the pipe body, the valve is used to connect the inner wall and the outer wall of the pipe body, and at the same time connect the outer wall of the pipe body with the slag discharge pipe of the jacking machine.

[0006] The above-mentioned simple method for cleaning the sediment outside the long-distance rock jacking pipe is to set multiple slag discharge systems on the pipe body at intervals along the length of the pipe, and the slag discharge systems are arranged circumferentially along the surface of the pipe.

[0007] The above-mentioned simple method for cleaning the sediment outside the long-distance rock jacking pipe, when the pipeline body is a steel pipe, the setting process of the slag removal system includes: A hole is drilled in the pipeline body (12), a short pipe (13) is welded, and a valve (11) is installed; and a slag-sweeping steel bar (14) is arranged beside the valve (11).

[0008] The above-mentioned simple method for cleaning the sediment outside the long-distance rock jacking pipe, when the pipe body is a concrete pipe, the setting process of the slag removal system includes: A bolt opening (23) is reserved on the concrete pipe (22), excess concrete pipe wall (24) below the bolt opening (23) is chiseled off, a short pipe (25) is screwed on and a valve (21) is installed; and a slag-sweeping steel bar (26) is arranged beside the valve (21).

[0009] The above-mentioned simple method for cleaning the sediment outside the long-distance rock jacking pipe is to gradually build a slag discharge system as the pipeline body is jacked. The valve of the slag discharge system is connected to the slag discharge pipe of the jacking machine, and the slag is discharged through the slag discharge pipe.

[0010] In the above-mentioned simple method for cleaning the sediment outside the long-distance rock jacking pipe, a grouting pipe (46) is further arranged inside the pipe body, and the grouting pipe (46) is used to flush the outer body of the pipe to reduce the resistance during the jacking process.

[0011] The construction method proposed by the present invention has the following advantages: 1. The construction is simple, safe, convenient and low-cost, which greatly improves the safety and reliability of long-distance rock jacking pipes.

[0012] 2. By using the monitoring data of the pipe jacking machine, the slag circulation system of the pipe jacking machine, and the grouting system, it is only necessary to add valves to achieve slag discharge along the entire length of the pipeline. Not only can the sediment formed by the crushing of the pipe jacking machine be removed, but also the sediment formed by the friction of the pipeline can be removed. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the installation of the steel pipe valve in the present invention.

[0014] Figure 2 This is a schematic diagram of the installation of the concrete pipe valve in the present invention.

[0015] Figure 3 It is a schematic diagram of the slag discharge system in the present invention. DETAILED DESCRIPTION

[0016] The technical solutions of the embodiments of the present application will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the embodiments of the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection requested by the present application.

[0017] like Figure 1 to Figure 3 A simple method for cleaning the sediment outside a long-distance rock jacking pipe comprises: Step 1: a slag discharge system is set on the pipeline body, and a slag discharge circulation system of the pipe jacking machine and a grouting system of the pipe jacking machine are used to set the slag discharge system on the pipeline body; Step 2: During the pipe jacking process, the slag discharge system is opened regularly to discharge slag; Step 3: During the pipe jacking process, when the resistance of the outer wall of the pipe increases, the slag discharge system is turned on to perform irregular slag discharge operations; Step 4: During the pipe jacking process, when the pipeline encounters resistance, deformation or locking, open the slag discharge system for emergency slag discharge operations.

[0018] The above-mentioned simple method for cleaning the sediment outside the long-distance rock jacking pipe, the slag discharge system includes a valve opened on the pipe body, and the valve is used to connect the inner wall and the outer wall of the pipe body.

[0019] The above-mentioned simple method for cleaning the sediment outside the long-distance rock jacking pipe is to set multiple slag discharge systems on the pipe body at intervals along the length of the pipe, and the slag discharge systems are arranged circumferentially along the surface of the pipe.

[0020] The above-mentioned simple method for cleaning the sediment outside the long-distance rock jacking pipe, when the pipeline body is a steel pipe, the setting process of the slag removal system includes: A hole is drilled in the pipeline body (12), a short pipe (13) is welded, and a valve (11) is installed; and a slag-sweeping steel bar (14) is arranged beside the valve (11).

[0021] The above-mentioned simple method for cleaning the sediment outside the long-distance rock jacking pipe, when the pipe body is a concrete pipe, the setting process of the slag removal system includes: A bolt opening (23) is reserved on the concrete pipe (22), excess concrete pipe wall (24) below the bolt opening (23) is chiseled off, a short pipe (25) is screwed on and a valve (21) is installed; and a slag-sweeping steel bar (26) is arranged beside the valve (21).

[0022] The above-mentioned simple method for cleaning the sediment outside the long-distance rock jacking pipe is to gradually build a slag discharge system as the pipeline body is jacked. The valve of the slag discharge system is connected to the slag discharge pipe of the jacking machine, and the slag is discharged through the slag discharge pipe.

[0023] In the above-mentioned simple method for cleaning sediment outside a long-distance rock jacking pipe, a grouting pipe (46) is further arranged inside the pipe body, and the grouting pipe (46) is used to flush the pipe body to reduce the resistance during the jacking process.

[0024] The above-mentioned simple cleaning method for the sediment outside the long-distance rock jacking pipe has three different slag discharge modes: 1. Regular slag discharge. Regular slag discharge is performed every time the jacking is performed. Open the pipe jacking machine valves 43, 45, valve 41 and mud pump 47, clean the mud bin and then circulate clean water. After the water flow is clear, slag discharge is performed. To discharge slag, close valves 41 and 43 first, open valve 33, and keep mud pump 47 and valve 45 in the open state. Open the external circulation to let water (clean water) in through the water inlet pipe 44, and drain water through the slag discharge pipe 42. Through the large circulation of clean water, the sediment is driven to flow and then the sediment is removed. After the water is clear, open valve 32 and close valve 33 in turn to clear the slag; finally, close valve 32 and open valve 31 to complete the regular slag cleaning work.

[0025] 2. Irregular slag discharge. According to the calculation method of the jacking force, the jacking force F=N+P*S+f*L, where P is the pressure in the front cabin of the jacking machine, N is the cutter head pressure, which can be obtained based on the equipment monitoring data, S is the outer diameter of the jacking machine, f is the friction resistance of the outer wall of the pipe, and L is the jacking length.

[0026] During the jacking process, pay close attention to the jacking force and draw a jacking distance-jacking force curve. When the curve suddenly becomes steeper, it means that the friction resistance increases. At this time, irregular slag removal should be carried out. The operation method of irregular slag removal is the same as that of regular slag removal.

[0027] 3. Emergency slag removal. When the pipeline is deformed (steel pipe bulges, bends, concrete pipe axis suddenly changes), open the slag removal valve 34 near the deformed pipeline, open the nearby grouting valve 35, inject grout through the grouting pipe 46, and discharge slag through the slag removal pipe 42 to form an external mud circulation slag removal. When the pipe jacking machine is stuck, open the relay room and open valves 31, 32, 33, 41, 43, and 45 at the same time. While slowly pushing forward, use clean water through the water inlet pipe 44 to circulate the mud discharge bin of the pipe jacking machine and the outside of the pipeline, slowly loosen the pipeline and push forward to discharge the sediment on the outer wall of the pipeline.

[0028] The slag discharge valve is closed. After the pipe jacking is completed, all the slag discharge valves are closed, and the slurry replacement work of the pipe jacking is completed with cement slurry. After the grouting solidifies, the valves and connecting pipes are removed, the steel pipes are closed with welded steel plates, and the concrete pipes are closed with grouting materials.

[0029] The above are only embodiments provided for the present application and are not intended to limit the present application. Although the present application is described in detail with reference to the embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. However, any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A simple method for cleaning the sediment outside a long-distance rock jacking pipe, comprising a slag circulation system of a jacking machine and a grouting system of the jacking pipe, characterized in that: The following steps are also included Step 1: Set up a slag discharge system on the pipeline body; Step 2: During the pipe jacking process, the slag discharge system is opened regularly to discharge slag; Step 3: During the pipe jacking process, when the resistance of the outer wall of the pipe increases, the slag discharge system is turned on to perform irregular slag discharge operations; Step 4: During the pipe jacking process, when the pipeline encounters resistance, deformation or locking, open the slag discharge system for emergency slag discharge operations.

2. The simple cleaning method for the sediment outside the long-distance rock jacking pipe according to claim 1 is characterized by: The slag discharge system comprises a valve arranged on the pipeline body, and the valve is used to connect the inner wall and the outer wall of the pipeline body, and at the same time connect the outer wall of the pipeline body with the slag discharge pipe of the pipe jacking machine.

3. The simple cleaning method for the sediment outside the long-distance rock jacking pipe according to claim 1 or 2 is characterized by: A plurality of slag discharge systems are arranged on the pipeline body at intervals along the length of the pipeline, and the slag discharge systems are arranged circumferentially along the surface of the pipeline.

4. The simple cleaning method for the sediment outside the long-distance rock jacking pipe according to claim 1 or 2 is characterized by: When the pipeline body is a steel pipe, the process of setting up the slag removal system includes: A hole is drilled in the pipeline body (12), a short pipe (13) is welded, and a valve (11) is installed; and a slag-sweeping steel bar (14) is arranged beside the valve (11).

5. The simple cleaning method for the sediment outside the long-distance rock jacking pipe according to claim 1 or 2 is characterized by: When the pipeline body is a concrete pipe, the process of setting up the slag removal system includes: A bolt opening (23) is reserved on the concrete pipe (22), excess concrete pipe wall (24) below the bolt opening (23) is chiseled off, a short pipe (25) is screwed on and a valve (21) is installed; and a slag-sweeping steel bar (26) is arranged on the steel sleeve ring beside the valve (21).

6. The simple cleaning method for the sediment outside the long-distance rock jacking pipe according to claim 1 or 2 is characterized by: As the pipe body is pushed forward, a slag discharge system is gradually constructed. The valve of the slag discharge system is connected to the slag discharge pipe of the pipe jacking machine, and the slag is discharged through the slag discharge pipe.

7. The simple cleaning method for the sediment outside the long-distance rock jacking pipe according to claim 1 or 2 is characterized by: It also includes a grouting pipe (46) which is used for continuous grouting during the pipe jacking process of the pipe jacking machine, and for implementing cyclic slag discharge and emergency slag discharge when emergency discharge is required. The grouting pipe (46) is also used for flushing the pipeline body to reduce the resistance during the jacking process.

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