CN109488331B - Molded shield tunnel segment and stress test method thereof - Google Patents
Molded shield tunnel segment and stress test method thereof Download PDFInfo
- Publication number
- CN109488331B CN109488331B CN201811515051.2A CN201811515051A CN109488331B CN 109488331 B CN109488331 B CN 109488331B CN 201811515051 A CN201811515051 A CN 201811515051A CN 109488331 B CN109488331 B CN 109488331B
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- segment
- pressure sensor
- test method
- duct piece
- pressure sensors
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- 238000010998 test method Methods 0.000 title claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 20
- 239000010959 steel Substances 0.000 claims abstract description 20
- 239000006260 foam Substances 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 claims description 11
- 230000005641 tunneling Effects 0.000 claims description 9
- 238000004088 simulation Methods 0.000 claims description 4
- 238000013461 design Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 238000010276 construction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000003044 adaptive effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M13/00—Testing of machine parts
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- General Physics & Mathematics (AREA)
- Civil Engineering (AREA)
- Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
Abstract
The invention discloses a formed shield tunnel duct piece and a stress test method thereof, comprising a duct piece body, wherein the duct piece body is in an annular structure formed by mutually and cross-connecting a plurality of annular duct pieces, the duct piece is in an arc-shaped structure, and grouting holes are formed in the arc surface of the duct piece; the pipe piece is provided with a mounting hole, a pressure sensor, a steel collar and a foam block are sequentially arranged in the mounting hole from top to bottom, a lead guide groove is formed in an inward cambered surface at a core die of the pressure sensor, and a strain gauge is arranged on the outer side surface of the steel collar; and a pressure sensor is arranged on the outer cambered surface of the duct piece. The invention provides a test method, which is simple and practical and can analyze the influence degree of the radial force of the tunnel segment on the tunnel deformation.
Description
Technical Field
The invention relates to the technical field of shield tunnel construction, in particular to a formed shield tunnel segment and a stress test method thereof.
Background
The shield construction becomes a main construction method of urban rail transit, and the stress state of the formed shield tunnel segment is only theoretically calculated and simulated and detected in a laboratory, so that the actual measurement case of the stress state of the segment is not seen. In the shield pushing process, the formed tunnel duct piece has rich underground water, insufficient synchronous grouting amount or limited theoretical simulation calculation research on the change relation between the dislocation deformation of the duct piece and the external force under the action of other external forces, and no practical engineering test research and summary are provided. The influence of the change of the shield thrust on the staggered platform of the pipe piece in the shield construction process, and the influence degree of buoyancy on the staggered platform of the pipe piece and the stress of the bolt is not seen in the actual test result all the time when the formed shield tunnel floats upwards under the action of external force.
In view of the above, it is necessary to provide a molded shield tunnel segment and a stress test method thereof, where the segment can simultaneously meet the requirement of water-soil pressure in the stratum for generating buoyancy to the segment.
Disclosure of Invention
The invention aims to provide a formed shield tunnel segment and a stress test method thereof, and provides a test method which is simple and practical and can analyze the influence degree of the radial force of the tunnel segment on tunnel deformation.
In order to achieve the above purpose, the invention provides a formed shield tunnel duct piece, which comprises a duct piece body, wherein the duct piece body is formed by mutually and cross-connecting a plurality of annular duct pieces, the duct piece is of an arc-shaped structure, and grouting holes are formed in the arc surface of the duct piece;
the pipe piece is provided with a mounting hole, a pressure sensor, a steel sleeve ring and a foam block are sequentially arranged in the mounting hole from top to bottom, the foam block is connected with the steel sleeve ring, the steel sleeve ring is connected with the pressure sensor, a lead guide groove is formed in an inward cambered surface of a core mold of the pressure sensor, and a strain gauge is arranged on the outer side surface of the steel sleeve ring;
a plurality of first bolt holes are formed in the annular surface of the duct piece, two pressure sensors are arranged between every two adjacent first bolt holes, and the distance between the two pressure sensors is 10-12cm;
The end face of the duct piece is provided with a plurality of second bolt holes, two pressure sensors are arranged between every two adjacent second bolt holes, and the distance between the two pressure sensors is 10-12cm;
and a pressure sensor is arranged on the extrados surface of the duct piece.
Preferably, the arc distance between the pressure sensor on the ring surface of the segment and the adjacent first bolt hole is 30cm.
Preferably, the foam block is of a hollow cylindrical structure, and grooves which are matched with the strain gauges are formed in the inner wall of the foam block.
Preferably, the steel collar is provided in a hollow cylindrical structure, and the inner diameter of the steel collar is consistent with the diameter of the pressure sensor.
Preferably, the depth of the mounting hole is 15mm.
A stress test method of a formed shield tunnel segment comprises the following steps:
A. In a segment production factory, after segment simulation assembly is completed and each segment is inspected to be qualified, determining the positions of reserved pressure sensors on the annular surface, the end surface and the outer cambered surface of the segment according to the size of a test design space, marking, and reserving a lead guide groove at the inner cambered surface of a core mold of each pressure sensor;
B. mounting holes for mounting pressure sensors are formed in the end face, the annular face and the outer cambered surface of each ring of the pipe piece, the positions of the mounting holes in the outer cambered surface of the pipe piece are located at grouting holes, and sealing treatment is conducted on the mounting holes;
C. Installing pressure sensors on the ring surface and the end surface of the pipe piece, installing the pressure sensors on each ring of pipe piece on the left end surface taking the shield tunneling direction as a reference, installing two pressure sensors on the front ring surface of each ring of pipe piece taking the shield tunneling direction as a reference, installing the pressure sensors on the outer cambered surface of the pipe piece at a grouting hole, and leading out a wire to be connected with test equipment;
D. transporting the segment with the pressure sensor to the site, normally tunneling a shield, observing the data change conditions of the pressure sensor on the end face, the annular face and the extrados of the segment, adjusting the pressure values of the propelling cylinders in different areas according to actual conditions, and observing the data change conditions of the pressure sensor;
E. after the shield tunnel is formed, the deformation and the external force change value of the segment are tested once every one month, and the external force data of the segment can be tested at intervals in the operation period of the tunnel;
F. and analyzing and summarizing data, and summarizing the relation between the external force applied to the segment and the deformation of the segment in different time periods.
Preferably, the pressure sensors on the end faces of the duct pieces are arranged in two.
Preferably, the grouting holes are used as lead-out holes of the pressure sensor during test.
Therefore, the formed shield tunnel segment adopting the structure and the stress test method thereof provide a test method, are simple and practical, and can analyze the influence degree of the radial force of the tunnel segment on the tunnel deformation.
The technical scheme of the invention is further described in detail through the drawings and the embodiments.
Drawings
FIG. 1 is a schematic view of a molded shield tunnel segment according to the present invention;
FIG. 2 is a schematic view of a toroidal structure of a molded shield tunnel segment according to the present invention;
FIG. 3 is a schematic diagram of an end face structure of a molded shield tunnel segment according to the present invention;
fig. 4 is a schematic diagram of the overall structure of a molded shield tunnel segment according to the present invention.
Detailed Description
Examples
Fig. 1 is a schematic structural view of a molded shield tunnel segment according to the present invention, fig. 2 is a schematic structural view of a torus of a molded shield tunnel segment according to the present invention, fig. 3 is a schematic structural view of an end face of a molded shield tunnel segment according to the present invention, and fig. 4 is a schematic structural view of an overall structure of a molded shield tunnel segment according to the present invention. As shown in the figure, the invention provides a formed shield tunnel duct piece, which comprises a duct piece body, wherein the duct piece body is formed by mutually and cross-connecting a plurality of ring duct pieces 1 to form an annular structure, the duct piece 1 is of an arc-shaped structure, and grouting holes 2 are formed in the arc surface of the duct piece 1; the pipe piece 1 is provided with a mounting hole 3, the depth of the mounting hole 3 is 15mm, a pressure sensor 4, a steel sleeve ring 5 and a foam block 6 are sequentially arranged in the mounting hole 3 from top to bottom, the foam block 6 is connected with the steel sleeve ring 5, the steel sleeve ring 5 is connected with the pressure sensor 4, a lead guide groove 7 is arranged on an inward cambered surface of a core die of the pressure sensor 4, and a strain gauge 8 is arranged on the outer side surface of the steel sleeve ring 5; the ring surface of the duct piece 1 is provided with a plurality of first bolt holes 9, two pressure sensors 4 are arranged between every two adjacent first bolt holes 9, and the distance between the two pressure sensors 4 is 10 cm to 12cm; the end face of the duct piece 1 is provided with a plurality of second bolt holes 10, two pressure sensors 4 are arranged between every two adjacent second bolt holes 10, and the distance between the two pressure sensors 4 is 10 cm to 12cm; a pressure sensor 4 is arranged on the extrados surface of the segment 1.
The arc distance between the pressure sensor 4 on the annular surface of the duct piece 1 and the adjacent first bolt hole 9 is 30cm.
The foam block 6 is arranged into a hollow cylindrical structure, a groove which is adaptive to the strain gauge 8 is formed in the inner wall of the foam block 6, the steel sleeve ring 5 is arranged into a hollow cylindrical structure, and the inner diameter of the steel sleeve ring 5 is consistent with the diameter of the pressure sensor 4.
A stress test method of a formed shield tunnel segment comprises the following steps:
A. In a segment production factory, after segment simulation assembly is completed and each segment is inspected to be qualified, determining the positions of reserved pressure sensors on the annular surface, the end surface and the outer cambered surface of the segment according to the size of a test design space, marking, and reserving a lead guide groove at the inner cambered surface of a core mold of each pressure sensor;
B. mounting holes for mounting pressure sensors are formed in the end face, the annular face and the outer cambered surface of each ring of the pipe piece, the positions of the mounting holes in the outer cambered surface of the pipe piece are located at grouting holes, and sealing treatment is conducted on the mounting holes;
C. Installing pressure sensors on the ring surface and the end surface of the pipe piece, installing the pressure sensors on each ring of pipe piece on the left end surface taking the shield tunneling direction as a reference, installing two pressure sensors on the front ring surface of each ring of pipe piece taking the shield tunneling direction as a reference, installing the pressure sensors on the outer cambered surface of the pipe piece at a grouting hole, and leading out a wire to be connected with test equipment;
D. transporting the segment with the pressure sensor to the site, normally tunneling a shield, observing the data change conditions of the pressure sensor on the end face, the annular face and the extrados of the segment, adjusting the pressure values of the propelling cylinders in different areas according to actual conditions, and observing the data change conditions of the pressure sensor;
E. after the shield tunnel is formed, the deformation and the external force change value of the segment are tested once every one month, and the external force data of the segment can be tested at intervals in the operation period of the tunnel;
F. and analyzing and summarizing data, and summarizing the relation between the external force applied to the segment and the deformation of the segment in different time periods.
Further, the pressure sensors on the end faces of the duct pieces are two.
Further, the grouting holes are used as lead-out holes of the pressure sensor in the test.
Therefore, the formed shield tunnel segment adopting the structure and the stress test method thereof provide a test method, are simple and practical, and can analyze the influence degree of the radial force of the tunnel segment on the tunnel deformation.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention and not for limiting it, and although the present invention has been described in detail with reference to the preferred embodiments, it will be understood by those skilled in the art that: the technical scheme of the invention can be modified or replaced by the same, and the modified technical scheme cannot deviate from the spirit and scope of the technical scheme of the invention.
Claims (5)
1. The stress test method of the formed shield tunnel segment is characterized by comprising the following steps of:
A. In a segment production factory, after segment simulation assembly is completed and each segment is inspected to be qualified, determining the positions of reserved pressure sensors on the annular surface, the end surface and the outer cambered surface of the segment according to the size of a test design space, marking, and reserving a lead guide groove at the inner cambered surface of a core mold of each pressure sensor;
B. mounting holes for mounting pressure sensors are formed in the end face, the annular face and the outer cambered surface of each ring of the duct piece, the positions of the mounting holes in the outer cambered surface of the duct piece are located at grouting holes, and the mounting holes are subjected to sealing treatment;
C. Installing pressure sensors on the ring surface and the end surface of the pipe piece, installing the pressure sensors on each ring of pipe piece on the left end surface taking the shield tunneling direction as a reference, installing two pressure sensors on the front ring surface of each ring of pipe piece taking the shield tunneling direction as a reference, installing the pressure sensors on the outer cambered surface of the pipe piece at a grouting hole, and leading out a wire to be connected with test equipment;
D. transporting the segment with the pressure sensor to the site, normally tunneling a shield, observing the data change conditions of the pressure sensor on the end face, the annular face and the extrados of the segment, adjusting the pressure values of the propelling cylinders in different areas according to actual conditions, and observing the data change conditions of the pressure sensor;
E. after the shield tunnel is formed, the deformation and the external force change value of the segment are tested once every one month, and the external force data of the segment can be tested at intervals in the operation period of the tunnel;
F. Analyzing and summarizing data, and summarizing the relation between the external force applied to the segment and the deformation of the segment in different time periods;
The formed shield tunnel duct piece comprises a duct piece body, wherein the duct piece body is formed by mutually and cross-connecting a plurality of annular duct pieces, the duct piece is of an arc-shaped structure, and grouting holes are formed in the duct piece;
the pipe piece is provided with a mounting hole, a pressure sensor, a steel sleeve ring and a foam block are sequentially arranged in the mounting hole from top to bottom, the foam block is connected with the steel sleeve ring, the steel sleeve ring is connected with the pressure sensor, a lead guide groove is formed in an inward cambered surface of a core mold of the pressure sensor, and a strain gauge is arranged on the outer side surface of the steel sleeve ring;
the ring surface of the duct piece is provided with a plurality of first bolt holes, two pressure sensors are arranged between every two adjacent first bolt holes, and the distance between the two pressure sensors is 10 cm to 12cm;
The end face of the duct piece is provided with a plurality of second bolt holes, two pressure sensors are arranged between every two adjacent second bolt holes, and the distance between the two pressure sensors is 10 cm to 12cm;
a pressure sensor is arranged on the outer cambered surface of the duct piece;
The foam block is of a hollow cylindrical structure, and the inner wall of the foam block is provided with a groove which is matched with the strain gauge;
The steel sleeve ring is arranged into a hollow cylindrical structure, and the inner diameter of the steel sleeve ring is consistent with the diameter of the pressure sensor.
2. The stress test method of the formed shield tunnel segment according to claim 1, wherein the stress test method comprises the following steps: the pressure sensors on the end faces of the duct pieces are two.
3. The stress test method of the formed shield tunnel segment according to claim 1, wherein the stress test method comprises the following steps: the grouting holes are used as lead-out holes of the pressure sensor in the test.
4. The stress test method of the formed shield tunnel segment according to claim 1, wherein the stress test method comprises the following steps: and the arc distance between the pressure sensor on the ring surface of the segment and the adjacent first bolt hole is 30cm.
5. The stress test method of the formed shield tunnel segment according to claim 1, wherein the stress test method comprises the following steps: the depth of the mounting hole is 15mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811515051.2A CN109488331B (en) | 2018-12-12 | 2018-12-12 | Molded shield tunnel segment and stress test method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811515051.2A CN109488331B (en) | 2018-12-12 | 2018-12-12 | Molded shield tunnel segment and stress test method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109488331A CN109488331A (en) | 2019-03-19 |
| CN109488331B true CN109488331B (en) | 2024-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201811515051.2A Active CN109488331B (en) | 2018-12-12 | 2018-12-12 | Molded shield tunnel segment and stress test method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113217016A (en) * | 2021-05-26 | 2021-08-06 | 中安华力建设集团有限公司 | Simulation system and simulation method for tunnel shield construction and segment installation quality control |
| CN113586038B (en) * | 2021-07-13 | 2024-03-22 | 大连地铁集团有限公司 | Method for installing soil pressure gauge in duct piece prefabrication process |
| CN115898455B (en) * | 2022-11-17 | 2024-05-28 | 深圳大学 | Variable-section connecting node segment of shield tunnel and assembly method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN209430206U (en) * | 2018-12-12 | 2019-09-24 | 中铁十八局集团有限公司 | Form duct pieces of shield tunnel |
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| CN101182772B (en) * | 2007-11-20 | 2011-05-11 | 中铁二局股份有限公司 | Two lines intersection small radius, shallow earth covering and large longitudinal slope complicated linetype shield construction method |
| KR101216391B1 (en) * | 2010-12-07 | 2012-12-28 | 한국건설기술연구원 | Segment structure of shield tunnel making use of a prestressed steel wire and segment lining method fixing the segment therewith |
| CN102278126A (en) * | 2011-04-29 | 2011-12-14 | 中铁第四勘察设计院集团有限公司 | Force testing method for connecting bolt of duct pieces in shield tunnel |
| CN102425427B (en) * | 2011-12-30 | 2013-12-25 | 中铁二局股份有限公司 | Method for constructing tunnel by utilizing shield empty-pushing crossing mine method |
| CN105987778B (en) * | 2015-05-06 | 2018-10-30 | 中铁建设投资集团有限公司 | A kind of in-situ measuring method of duct pieces of shield tunnel seam stress |
| CN105258824B (en) * | 2015-11-05 | 2018-04-13 | 白云 | A kind of shield tunnel Water And Earth Pressures monitoring rod |
| CN207728372U (en) * | 2017-12-07 | 2018-08-14 | 广州地铁设计研究院有限公司 | A kind of duct pieces of shield tunnel interannular device for pressure measurement |
| CN108225757A (en) * | 2018-01-09 | 2018-06-29 | 上海应用技术大学 | A kind of superimposing thread tunnel influences each other tunnel segment structure mechanical stae field testing procedure |
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| CN209430206U (en) * | 2018-12-12 | 2019-09-24 | 中铁十八局集团有限公司 | Form duct pieces of shield tunnel |
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