CN210598993U - Reinforced concrete segment joint pressure testing device in subway shield tunnel - Google Patents
Reinforced concrete segment joint pressure testing device in subway shield tunnel Download PDFInfo
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- CN210598993U CN210598993U CN201921572221.0U CN201921572221U CN210598993U CN 210598993 U CN210598993 U CN 210598993U CN 201921572221 U CN201921572221 U CN 201921572221U CN 210598993 U CN210598993 U CN 210598993U
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Abstract
The utility model relates to a reinforced concrete section of jurisdiction seam pressure test device in subway shield tunnel, including at least one built-in fitting and pressure sensor subassembly, the built-in fitting is including setting firmly the bottom in the section of jurisdiction and setting firmly the cylindrical sleeve on the bottom, the pressure sensor subassembly includes cylindric pressure sensor, paste the circular rubber pad of fixing on pressure sensor both ends face and paste and locate the foil gage on the sleeve inner wall, pressure sensor inserts and establishes in the sleeve, fill the grout layer between pressure sensor and the sleeve inner wall, be equipped with the wire casing that is used for burying pressure sensor data line underground on the seam face of section of jurisdiction, wire casing connecting sleeve and section of jurisdiction internal surface, pressure sensor's data line draws external measuring terminal through the wire casing. The utility model has the advantages that: when the pressure at the joint of the tunnel segment changes, the pressure sensor can measure the change of the pressure at the joint.
Description
Technical Field
The utility model relates to a reinforced concrete section of jurisdiction seam pressure test device in subway shield tunnel among the shield tunnel engineering field.
Background
The tunnel structure in the prior art, as shown in fig. 4, the tunnel structure 1 includes a plurality of segment rings 2 connected in sequence by bolts along the tunnel axis direction, each segment ring 2 is formed by splicing a plurality of reinforced concrete segments by bolts, and each segment ring includes a capping block 4 (the central angle is 22.5 °), two adjacent blocks 5 (the central angle is 67.5 °), and three standard blocks 3 (the central angle is 67.5 °). After the subway shield segment is assembled, the tunnel segment can be staggered, and the friction force at the joint and the shearing resistance of the connecting bolt need to be overcome; in the conventional tunnel segment design, for the convenience of splicing, the diameter of a bolt hole is larger than that of a bolt, so that the segment is staggered to firstly overcome the friction force at a joint, and the friction force at the joint depends on the concrete friction coefficient of a segment contact interface and the vertical pressure at the joint; the friction coefficient can be obtained through experiments, and the vertical pressure at the joint is mainly related to the pre-tightening force applied to the bolt and the pushing force of the jack; the pressure generated by the jack thrust at the joint is not constant all the time and can be attenuated continuously towards the reverse axial direction of the shield tunneling. At present, domestic scholars give pressure attenuation amplitude at joints according to construction experience, but do not have any data support. Therefore, the pressure measurement at the joint is very important.
Disclosure of Invention
An object of the utility model is to provide a can survey testing arrangement of reinforced concrete section of jurisdiction seam crossing pressure in subway shield tunnel.
In order to solve the technical problem, the technical scheme of the utility model as follows:
a pressure testing device for a reinforced concrete segment joint in a subway shield tunnel comprises at least one embedded part which is embedded and fixedly arranged at two axial sides of a segment and a pressure sensor assembly arranged in the embedded part, wherein the embedded part comprises a bottom cover fixedly arranged in the segment and a columnar sleeve fixedly arranged on the bottom cover, the pressure sensor assembly comprises a columnar pressure sensor, the pressure sensor is inserted into the sleeve, the sensing surface of the pressure sensor faces outwards, the circular rubber pad on the outer side of the pressure sensor is flush with the joint surface of the duct piece, a grouting material layer is filled between the pressure sensor and the inner wall of the sleeve, a wire groove used for embedding a pressure sensor data wire is arranged on the joint surface of the duct piece, the wire groove is connected with the inner surface of the duct piece, and the data wire of the pressure sensor is led to an external measuring end through the wire groove.
The wall thickness of the sleeve is 1-2 mm, and the sleeve is welded on a reinforcement cage of the duct piece.
The height and diameter of the pressure sensor are 5mm and 10mm smaller than the height and diameter of the cylindrical sleeve, respectively.
The thickness of the circular rubber pad is 3mm, and the diameter of the circular rubber pad is the same as that of the pressure sensor.
The utility model has the advantages that: the embedded part is of a pre-assembly structure, is embedded and fixed in the duct piece in the manufacturing process of the reinforced concrete duct piece, so that the pressure sensor is conveniently installed in the embedded part, a wire groove for embedding a data wire of the pressure sensor is arranged on the joint surface of the duct piece, the data wire is placed in the wire groove and is temporarily sealed by using a transparent adhesive tape, and the data is conveniently received; when the pressure at the joint of the tunnel segment changes, the pressure sensor can measure the change of the pressure at the joint. When the pressure sensor is installed, the reinforced concrete pipe piece does not need to be dug again, so that the damage of the grooving construction to the reinforced concrete pipe piece is avoided, the process is simplified, and the installation time is shortened.
Drawings
Fig. 1 is a schematic structural view of an embodiment of the present invention;
FIG. 2 is a cross-sectional view A-A of FIG. 1;
FIG. 3 is a schematic diagram of a pressure sensor;
fig. 4 is a schematic view of the structure of a segment tunnel.
Detailed Description
A pressure testing device for joints of reinforced concrete segments in a subway shield tunnel is shown in figures 1-4 and comprises at least one embedded part 6 and a pressure sensor assembly, wherein the embedded part 6 is fixedly embedded in the two axial sides of each segment, the pressure sensor assembly is installed in the embedded part, the number of the embedded parts is determined according to the thickness and the arc length of each segment, in the embodiment, two embedded parts are arranged at each end of a top sealing block, four embedded parts are arranged at each end of an adjacent block and a standard block, it needs to be pointed out that the segments in the embodiment are reinforced concrete segments and are formed by a reinforcement cage and concrete pouring, and reinforcing steel bars forming the reinforcement cage comprise longitudinal reinforcing steel bars 14, circumferential reinforcing steel bars 13 and radial reinforcing steel bars (not shown) along the longitudinal direction of the tunnel segments. The embedded part comprises a bottom cover 8 fixedly arranged in the pipe piece and a columnar sleeve 7 fixedly arranged on the bottom cover, the pressure sensor assembly comprises a columnar pressure sensor 11, a circular rubber pad 12 fixedly adhered to two end faces of the pressure sensor and a strain gauge (not shown) adhered to the inner wall of the sleeve, the pressure sensor is inserted in the sleeve, the sensing surface of the pressure sensor faces outwards, the circular rubber pad outside the pressure sensor is flush with the joint face of the pipe piece, a grouting material layer is filled between the pressure sensor and the inner wall of the sleeve, a wire groove for embedding a data wire of the pressure sensor is arranged on the joint face of the pipe piece, the wire groove is connected with the inner surface of the sleeve and the inner surface of the pipe piece, the data wire of the pressure sensor is led to an external measuring end through the wire groove, the wall thickness of the sleeve is 1-2 mm, the embedded part is welded on a steel reinforcement cage of the pipe piece, and the thickness of the circular rubber pad is 3mm, and the diameter of the circular rubber pad is the same as that of the pressure sensor.
In order to prevent concrete from entering the sleeve when pouring, the outer end of the sleeve is also fixedly plugged with a top cover 9, the embedded part 6 is welded with a reinforcement cage before a reinforced concrete segment is poured, the top cover 9 is parallel to a segment joint surface during welding, and meanwhile, the upper edge of the sleeve wall is flush with the reinforced concrete segment joint surface. In the manufacturing process of the reinforced concrete segment, when concrete is poured, the sleeve is a hollow sealing body; after concrete pouring is finished, the top cover is removed, the strain gauge is adhered to the inner wall of the sleeve, the pressure sensor is placed, and the pressure sensor is ensured to sense that the head-on surface faces outwards and is flush with the joint surface of the reinforced concrete segment during placement. Then, a slot 10 is opened on the wall of the sleeve 7 and the joint surface of the duct piece, and the data line of the pressure sensor is placed into the slot 10 and temporarily sealed by using an adhesive tape; and then, a grouting material layer is formed by filling a hole between the pressure sensor 11 and the sleeve 7 with grouting material, and when the device is used, after the duct piece assembly is completed along with the tunneling of a shield machine, the data line connection acquisition system is taken out from the wire groove to carry out testing.
Claims (4)
1. A device for testing the joint pressure of a reinforced concrete pipe piece in a subway shield tunnel is characterized by comprising at least one embedded part and a pressure sensor assembly, wherein the embedded part is embedded and fixedly arranged on two axial sides of the pipe piece, the pressure sensor assembly is arranged in the embedded part, the embedded part comprises a bottom cover fixedly arranged in the pipe piece and a columnar sleeve fixedly arranged on the bottom cover, the pressure sensor assembly comprises a cylindrical pressure sensor, circular rubber pads fixedly adhered on two end faces of the pressure sensor and a strain gauge adhered on the inner wall of the sleeve, the pressure sensor is inserted in the sleeve, the sensing face of the pressure sensor faces outwards, the circular rubber pads on the outer side of the pressure sensor are flush with the joint face of the pipe piece, a grouting material layer is filled between the pressure sensor and the inner wall of the sleeve, a wire groove for embedding a data line of the pressure sensor is arranged on the joint face of, the data line of the pressure sensor is led to the external measuring end through the wire groove.
2. The device for testing the joint pressure of the reinforced concrete segments in the subway shield tunnel according to claim 1, characterized in that: the wall thickness of the sleeve is 1-2 mm, and the sleeve is welded on a reinforcement cage of the duct piece.
3. The device for testing the joint pressure of the reinforced concrete segments in the subway shield tunnel according to claim 1, characterized in that: the height and diameter of the pressure sensor are 5mm and 10mm smaller than the height and diameter of the cylindrical sleeve, respectively.
4. The device for testing the joint pressure of the reinforced concrete segments in the subway shield tunnel according to claim 1, characterized in that: the thickness of the circular rubber pad is 3mm, and the diameter of the circular rubber pad is the same as that of the pressure sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921572221.0U CN210598993U (en) | 2019-09-20 | 2019-09-20 | Reinforced concrete segment joint pressure testing device in subway shield tunnel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921572221.0U CN210598993U (en) | 2019-09-20 | 2019-09-20 | Reinforced concrete segment joint pressure testing device in subway shield tunnel |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210598993U true CN210598993U (en) | 2020-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
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| CN201921572221.0U Active CN210598993U (en) | 2019-09-20 | 2019-09-20 | Reinforced concrete segment joint pressure testing device in subway shield tunnel |
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| CN (1) | CN210598993U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565529A (en) * | 2021-07-24 | 2021-10-29 | 郑州大学 | Rear-buried testing device and mounting method for frost heaving pressure of shield tunnel segment lining |
-
2019
- 2019-09-20 CN CN201921572221.0U patent/CN210598993U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113565529A (en) * | 2021-07-24 | 2021-10-29 | 郑州大学 | Rear-buried testing device and mounting method for frost heaving pressure of shield tunnel segment lining |
| CN113565529B (en) * | 2021-07-24 | 2023-10-27 | 郑州大学 | Rear buried type testing device for frost heaving pressure of segment lining and mounting method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhao Shiyong Inventor after: Su Bin Inventor after: Liu Jianyang Inventor after: Yu Weiguang Inventor after: Zhao Junliang Inventor after: Li Mingyu Inventor after: Zhang Qirui Inventor after: Chen Hong Inventor after: Liu Yonghui Inventor after: Guo Yuancheng Inventor after: Jin Junwei Inventor after: Tao Yunchao Inventor after: Zhao Songzhuang Inventor before: Li Mingyu Inventor before: Su Bin Inventor before: Liu Jianyang Inventor before: Yu Weiguang Inventor before: Zhao Junliang Inventor before: Zhang Qirui Inventor before: Chen Hong Inventor before: Zhao Shiyong Inventor before: Liu Yonghui Inventor before: Guo Yuancheng Inventor before: Jin Junwei Inventor before: Tao Yunchao Inventor before: Zhao Songzhuang |
|
| CB03 | Change of inventor or designer information | ||
| CP03 | Change of name, title or address |
Address after: 6 / F, NO.666 Gonghe Xin Road, Jing'an District, Shanghai 200040 Patentee after: CHINA RAILWAY 15TH CONSTRUCTION BUREAU GROUP Co.,Ltd. Patentee after: URBAN RAIL TRANSIT ENGINEERING COMPANY LIMITED OF CHINA RAILWAY 15TH BUREAU Patentee after: Zhengzhou University Address before: No. 100, Kexue Avenue, high tech Development Zone, Zhengzhou City, Henan Province Patentee before: Zhengzhou University Patentee before: CHINA RAILWAY 15TH CONSTRUCTION BUREAU GROUP Co.,Ltd. Patentee before: URBAN RAIL TRANSIT ENGINEERING COMPANY LIMITED OF CHINA RAILWAY 15TH BUREAU |
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| CP03 | Change of name, title or address |