Prefabricated duct piece for reducing deformation of main tunnel in mechanical method connection channel construction

Abstract

The utility model discloses a prefabricated pipe piece for reducing deformation of a main tunnel pipe piece in a mechanical method contact channel construction process, a main body is composed of three-ring pipe pieces, the three-ring pipe pieces are connected together through prestressed steel bars, and two ends of the prestressed steel bars penetrate out of two ring holes in the side edges, enter counter-force supports and tensioning jacks at two ends and are fixed by anchorage devices. And a strain sensor is arranged on the middle ring through which the prestressed steel bar passes. The counter-force support and the duct piece are welded together, and a control system is arranged in the counter-force support to control the tensioning jack to work. When the duct piece is cut, the duct piece can generate strain, at the moment, the strain sensor embedded in the middle transmits a signal to the control center when sensing excessive deformation, and the control center controls the tensioning sensor to work, tension the prestressed steel bars and enable the duct piece to contract, so that the duct piece is prevented from being damaged due to excessive deformation. The utility model aims to provide a method for reducing the deformation of the main tunnel duct piece to prevent the duct piece from being deformed and damaged.

Description

Technical Field

[0001] The utility model relates to the field of mechanical communication channel construction, in particular to a prefabricated pipe segment for reducing the deformation of a main tunnel pipe segment during the communication channel construction process. Background Art

[0002] A tunnel is a passage dug out of an existing building or earth-rock structure. It is an engineering project buried in the ground. During the tunnel construction process, especially when mechanical methods are used to construct the connecting passage, deformation of the main tunnel segments is a common and serious problem. Mechanical construction usually causes a large disturbance to the surrounding structure, causing the main tunnel segments to be easily deformed or even damaged during the construction process. This deformation not only affects the structural stability and service life of the tunnel, but may also bring safety hazards.

[0003] In the prior art, in order to reduce the deformation of the pipe segment, the method of strengthening the structure or increasing the thickness of the pipe segment is usually adopted, but these methods often lead to increased construction costs, and in some cases still cannot effectively prevent deformation. In addition, when the existing pipe segment structure is subjected to external forces, there is a lack of real-time monitoring and adjustment mechanism, and it is impossible to take timely measures to correct the deformation when it occurs, which further increases the risk of deformation damage.

[0004] The utility model proposes an improved prefabricated segment structure, which realizes real-time monitoring and active control of segment deformation by connecting three-ring segments together with prestressed steel bars and placing strain sensors in the middle ring through which the prestressed steel bars pass. When the segment deforms too much, the control system controls the tensioning jack to tension the prestressed steel bars to shrink the segment, thereby effectively reducing the deformation of the segment and avoiding structural damage. This solution not only improves the safety and reliability of tunnel construction, but also reduces construction and maintenance costs, and has broad application prospects. Utility Model Content

[0005] The main purpose of the utility model is to propose a prefabricated pipe segment and a control method thereof for reducing the deformation of the main tunnel pipe segment during the mechanical method communication channel construction process, aiming to solve the problem that the deformation of the pipe segment is difficult to control during the tunnel construction process in the prior art.

[0006] To achieve the above-mentioned purpose, the present invention provides a prefabricated segment for reducing the deformation of the main tunnel segment during the construction of the mechanical communication channel. The prefabricated segment consists of a three-ring segment connected together by prestressed steel bars. The two ends of the prestressed steel bars pass through the two ring holes on the side, enter the reaction support and the tensioning jacks at both ends, and are fixed by anchors. A strain sensor is placed in the middle ring through which the prestressed steel bars pass. The reaction support is welded to the segment, and a control system is set inside the reaction support to control the operation of the tensioning jack.

[0007] The prefabricated pipe segment includes a three-ring pipe segment, which is connected by prestressed steel bars. Both ends of the prestressed steel bars pass through two ring holes and enter the reaction support and the tensioning jack and are fixed by anchors. A strain sensor is arranged at the middle ring of the prestressed steel bars.

[0008] The reaction force support is welded to the pipe segment, and a control system is arranged inside the reaction force support for controlling the operation of the tensioning jack.

[0009] When the pipe segment is cut, it will be strained. At this time, when the strain sensor buried in the middle ring senses excessive deformation, it sends a signal to the control system. The control system controls the tensioning jack to work, tension the prestressed steel bars, and shrink the pipe segment, thereby preventing the pipe segment from producing excessive deformation.

[0010] Preferably, the strain sensor is embedded in the middle ring and connected to the control system.

[0011] Preferably, the prestressed steel bar passes through the tensioning jack and is fixed at both ends of the tensioning jack by anchors.

[0012] Preferably, the prestressed steel bars penetrate the middle ring of the three-ring segment and pass through the holes of the two side rings.

[0013] Preferably, the control system inside the reaction support can set a safe strain value for monitoring the strain and controlling the operation of the tensioning jack.

[0014] The beneficial effects of the utility model are as follows: through prestressed steel bars and a real-time monitoring system, the deformation of the pipe segments can be effectively controlled during the construction process, and structural problems caused by excessive deformation can be prevented, thereby improving construction safety. Real-time monitoring and adjustment technology ensures the stability and integrity of the pipe segments under stress, thereby ensuring the quality of tunnel construction and reducing the need for later maintenance. By reducing the deformation of the pipe segments, the possibility of stress concentration and fatigue damage is reduced, thereby extending the service life of the pipe segments and tunnel structures. The automated strain monitoring and tensioning adjustment system simplifies the monitoring and adjustment work during the construction process, improves construction efficiency, and reduces manual intervention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is an overall schematic diagram of the three-ring segment of the utility model;

[0016] Figure 2 This is an overall schematic diagram of the utility model after the three-ring segment construction is completed;

[0017] Figure 3 This is a schematic diagram of one of the tube segments of the intermediate ring of the utility model;

[0018] Figure 4 This is a schematic diagram of one of the tube segments of the outer ring of the utility model;

[0019] Figure 5 It is an overall schematic diagram of the reaction force support, control system and tension jack of the utility model.

[0020] In the figure: 1. middle ring segment, 2. outer ring segment, 3. reaction support, 4. tensioning jack, 5. anchor, 6. prestressed steel bar, 601. middle ring hole, 602. side ring hole, 603. reaction support hole, 7. strain sensor, 8. control system. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with the accompanying drawings.

[0022] like Figure 1 As shown, the utility model discloses a prefabricated pipe segment for reducing the deformation of the main tunnel during the construction of the mechanical communication channel. The purpose is to reduce the deformation of the pipe segment during the construction process by real-time monitoring and adjusting the tension of the prestressed steel bars, thereby improving the safety and reliability of tunnel construction. The prefabricated pipe segment of this patent is composed of a middle ring pipe segment 1 and two outer ring pipe segments 2, and the three ring pipe segments are connected together by prestressed steel bars 6. The two ends of the prestressed steel bars pass through the side ring holes 602 on both sides, enter the reaction support 3 and the tensioning jacks 4 at both ends, and are fixed by anchors 5. A strain sensor 7 is placed in the middle ring through which the prestressed steel bars 6 pass. The reaction support 3 is welded to the outer ring pipe segment 2, and a control system 8 is set inside the reaction support 3 to control the operation of the tensioning jack.

[0023] like Figure 2 The figure shows the overall schematic diagram of the three-ring pipe segment after the construction of the utility model is completed. A circular channel is cut out of the three-ring pipe segment, and no prestressed steel bars are placed on the cut pipe segments. When being cut, the deformation of the pipe segment gradually increases. When the strain sensor 7 transmits a signal to the control system 8, the control system 8 recognizes the excessive deformation and controls the tensioning jack 4 to start tensioning, thereby increasing the overall strength of the pipe segment and reducing the deformation of the pipe segment during the construction process. When the deformation is controlled within a safe range, the tensioning jack 4 is controlled to stop working.

[0024] like Figure 3 As shown, it is a schematic diagram of one of the segments of the intermediate ring of the utility model. The segment has a through intermediate ring hole 601 for installing prestressed steel bars 6. A space is reserved in the middle position of the hole to place a strain sensor 7. The strain sensor 7 can continuously monitor the strain value of the intermediate ring segment and transmit the signal to the control system 8.

[0025] like Figure 4As shown, it is a schematic diagram of one of the side ring segments of the utility model. After the prestressed steel bar passes through the middle ring, it enters the side ring hole 602, passes through the middle position of the outer ring segment 2, and enters the reaction support 3. In this way, the prestressed steel bar can pass through the three-ring segment, and the whole structure is fixed together by the reaction support 3, the tensioning jack 4 and the anchor 5.

[0026] like Figure 5 As shown, it is an overall schematic diagram of the reaction force support, control system and tensioning jack of the utility model. The reaction force support 3 and the outer ring pipe segment 2 are welded together, which is very strong and can provide sufficient supporting force when the tensioning jack 4 is working. A control system 8 is arranged inside the reaction force support 3. We can look up relevant indicators and initialize the strain safety value inside the control system 8 according to the specific construction situation. The control system 8 can receive the signal from the strain sensor 7. When it is detected that the strain is greater than the set strain safety value, the tensioning jack 4 is controlled to work and tighten the prestressed steel bar 6. The tightened steel bar will be fixed by the anchor 5 to prevent rebound.

[0027] Through the above technical solution, the utility model can sense the deformation of the pipe segment in real time by placing a strain sensor in the middle ring through which the prestressed steel bar passes. When the strain sensor detects that the deformation of the pipe segment exceeds the safe range, the control system controls the tensioning jack to work, tension the prestressed steel bar, and shrink the pipe segment, thereby reducing the deformation. Through real-time monitoring and active adjustment, it is possible to effectively prevent the damage of the pipe segment caused by excessive deformation, thereby ensuring the safety of the tunnel structure. Compared with the traditional method of increasing the thickness of the pipe segment or using higher strength materials, the present invention provides a more economical and effective solution.

Claims

1. A prefabricated segment for reducing deformation of a main tunnel during mechanical construction of a connecting channel, characterized in that: The prefabricated pipe segment is composed of three-ring pipe segments, which are connected together by prestressed steel bars. The two ends of the prestressed steel bars pass through the two side ring holes into the reaction support and the tensioning jacks at both ends and are fixed by anchors, and a strain sensor is placed in the middle ring through which the prestressed steel bars pass.

2. The prefabricated segment according to claim 1, characterized in that: The reaction support is welded to the pipe segment, and a control system is arranged inside the reaction support for controlling the operation of the tensioning jack.

3. The prefabricated segment according to claim 2, characterized in that: The control system receives signals through strain sensors, and when excessive deformation is sensed, controls the tensioning jacks to tension the prestressed steel bars, causing the segments to shrink and prevent excessive deformation, and controls the tensioning jacks to stop working when the deformation is within a safe range.

4. The prefabricated segment according to any one of claims 1 to 3, characterized in that: The strain sensor is embedded in the middle ring.

5. The prefabricated segment according to any one of claims 1 to 3, characterized in that: The prestressed steel bars are fixed to both ends of the tensioning jack through anchors.

6. The prefabricated segment according to any one of claims 1 to 3, characterized in that: The prestressed steel bars penetrate the middle ring of the three-ring segment and pass through the holes of the two side rings.

7. The prefabricated segment according to claim 2 or 3, characterized in that: The strain safety value is set during system initialization. When the strain value transmitted by the strain sensor is greater than the safety value, the control system controls the tensioning jack to perform tensioning. When the strain value returns to the safety value range, the tensioning jack stops tensioning.

8. The prefabricated segment according to any one of claims 1 to 3, characterized in that: The tensioning jack is fixed on the outside of the reaction support.

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