Tensioning structure for preventing excessive deformation of pipe piece of mechanical method contact channel

Abstract

The utility model discloses a tensioning structure for preventing overlarge deformation of a mechanical method contact channel duct piece, which comprises an annular prestress tensioning steel plate arranged in the middle of the duct piece, two ends of the annular prestress tensioning steel plate are bent at the lower part of the duct piece and penetrate through a counter-force support to be connected with a jack, and the end part is fixed by an anchorage device; the counter-force support is arranged on the inner wall of the duct piece; the jack is connected with the prestress tensioning steel plate; the strain sensors are embedded in the 90-degree inner wall and the-90-degree inner wall of the pipe And the control system is linked with the jack and the strain sensor through a control circuit. And when the strain sensor detects that the strain of the duct piece exceeds a threshold value, the control system starts the jack to stretch the steel plate to generate circumferential contraction force, and self-locking is carried out until the strain returns to normal. The utility model aims to prevent the deformation of the main tunnel duct piece caused by mechanical method connection channel construction.

Description

Technical Field

[0001] The utility model relates to the field of construction of mechanical connection channels, in particular to a tensioning structure for preventing excessive deformation of segment linings in mechanical connection channels. Background Art

[0002] During the construction of the subway, it is necessary to build a connection channel connecting two subway tunnels (up and down tunnels) between the two subway tunnels. When the connection channel is under construction, the previously buried pipelines are prone to deformation due to the jacking force of the connection channel. The utility model adopts a tensioning structure for preventing excessive deformation of segment linings in mechanical connection channels, which can prevent the deformation of segment linings during the construction of the connection channel. Summary of the Utility Model

[0003] The main purpose of the utility model is to prevent the deformation of the segment linings of the main tunnel buried previously due to the influence of the jacking force of the connection channel during the construction of the mechanical connection channel.

[0004] To achieve the above purpose, the utility model provides a tensioning structure for preventing excessive deformation of segment linings in mechanical connection channels, which comprises: a circumferential prestressed tensioning steel plate arranged in the middle of the segment linings, the two ends of which are bent at the lower part of the segment linings and pass through the reaction support to be connected with the jack, and the ends are fixed by the anchor; a reaction support arranged on the inner wall of the segment linings; a jack connected with the prestressed tensioning steel plate; strain sensors buried in the inner walls of the segment linings at 90° and -90°; and a control system which is linked with the jack and the strain sensors through a control line.

[0005] Further, the jack can be started and locked by the control system.

[0006] Further, the control system is configured as: when the strain sensor detects that the strain of the segment linings exceeds the threshold value, the jack is started to extend and tension the prestressed tensioning steel plate through the control line until the strain returns to normal and then the self-locking is triggered.

[0007] Advantageous Effects

[0008] (1) By burying strain sensors in the inner walls of the segment linings at 90° and -90°, the deformation condition of the segment linings can be sensed in real time. When the strain sensor detects that the strain of the segment linings exceeds the threshold value, the control system controls the tensioning jack to work and tension the prestressed steel plate, so that the segment linings shrink, thereby reducing the deformation. Through real-time monitoring and active adjustment, the damage caused by excessive deformation of the segment linings can be effectively prevented, and the safety of the tunnel structure can be ensured. Compared with the traditional method of increasing the thickness of the segment linings or using higher-strength materials, the utility model provides a more economical and effective solution.

[0009] (2) The automated strain monitoring and tensioning adjustment system simplifies the monitoring and adjustment work during construction, improves construction efficiency, and reduces manual intervention.

[0010] (3) The real-time monitoring and adjustment technology ensures the stability and integrity of the segments under stress, thus guaranteeing the quality of tunnel construction and reducing the need for later maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following-described drawings are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0012] Figure 1 is a three-dimensional structural schematic diagram of a tensioning structure for preventing excessive deformation of segments in a mechanical connection passage of the present invention;

[0013] Figure 2 is a main structural schematic diagram of the present invention;

[0014] Figure 3 is a schematic diagram of a strain sensor of the present invention.

[0015] Explanation of the reference numerals in the drawings: 1, segment; 2, prestressed tensioning steel plate; 3, reaction support; 4, jack; 5, anchor; 6, control system; 7, control circuit; 8, strain sensor. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0017] As Figure 1 described, the tensioning structure is provided with a circumferential prestressed tensioning steel plate 2, a reaction support 3, a jack 4, an anchor 5, a control system 6, a control circuit 7, and a strain sensor 8.

[0018] As Figure 2 , Figure 3As shown, the circumferential prestressed tension steel plate 2 is arranged in the middle of the segment 1. Both ends of the prestressed tension steel plate 2 are bent at the corresponding positions at the lower part of the segment 1, pass through the reaction support 3 and are connected to the jack 4. The end of the prestressed tension steel plate 2 is fixed by the anchor 5. The prestressed tension steel plate 2 can be tensioned by the jack 4 to generate a contraction force, and the contraction force can prevent the deformation of the segment 1. The jack 4 can be started and self-locked through the control system. The strain sensor 8 can sense the strain of the main tunnel segment 1 in real time during the construction of the mechanical connection passage, and can transmit signals to the control system 6 in real time through the control line 7. After receiving the signal transmitted by the strain sensor 8, if the strain of the segment 1 exceeds the threshold, the control system 6 will start the jack 4 to elongate through the control line 7, tension the prestressed tension steel plate 2. When the jack 4 is tensioned to a certain extent and the signal transmitted by the strain sensor 8 shows that the strain is normal, the control system 6 will trigger the self-locking of the jack 4.

[0019] The above are only the preferred embodiments of the present invention, and do not limit the patent scope of the present invention. Any equivalent structural transformation made by using the description and drawings of the present invention under the inventive concept of the present invention, or direct / indirect application in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A tensioning structure to prevent excessive deformation of mechanical communication channel segments, characterized in that: include: The annular prestressed tensioning steel plate is arranged in the middle of the segment, and its two ends are bent at the lower part of the segment and passed through the reaction support to be connected to the jack, and the ends are fixed by anchors; the reaction support is arranged on the inner wall of the segment; the jack is connected to the prestressed tensioning steel plate; the strain sensor is buried in the inner wall of the segment at 90° and -90°; and the control system is linked with the jack and the strain sensor through the control line.

2. A tensioning structure for preventing excessive deformation of mechanical communication channel segments according to claim 1, characterized in that: The jack can be started and self-locked by a control system.

3. A tensioning structure for preventing excessive deformation of mechanical communication channel segments according to claim 1 or 2, characterized in that: The control system is configured as follows: when the strain sensor detects that the strain of the pipe segment exceeds a threshold value, the jack is started to stretch and tension the prestressed tensioning steel plate through the control circuit until the strain returns to normal and triggers self-locking.

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