CN202305349U - Test device for bearing capacity of tunnel secondary lining concrete structure - Google Patents
Test device for bearing capacity of tunnel secondary lining concrete structure Download PDFInfo
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- CN202305349U CN202305349U CN2011203977091U CN201120397709U CN202305349U CN 202305349 U CN202305349 U CN 202305349U CN 2011203977091 U CN2011203977091 U CN 2011203977091U CN 201120397709 U CN201120397709 U CN 201120397709U CN 202305349 U CN202305349 U CN 202305349U
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- 238000012360 testing method Methods 0.000 title claims abstract description 32
- 229910000831 Steel Inorganic materials 0.000 claims description 18
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- 239000000725 suspension Substances 0.000 claims description 4
- 238000013461 design Methods 0.000 abstract description 6
- 238000010276 construction Methods 0.000 abstract description 5
- 238000001514 detection method Methods 0.000 abstract description 4
- 238000004364 calculation method Methods 0.000 description 7
- 238000010586 diagram Methods 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
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- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
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- 238000011065 in-situ storage Methods 0.000 description 1
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Abstract
The utility model relates to a test device for the bearing capacity of a tunnel secondary lining concrete structure. The device comprises a pressure box, a hook, a hanging rod, a spring balance, a stacking platform and a stress strain gauge, wherein the pressure box is fixedly buried between a waterproof layer and secondary lining concrete of a tunnel; the hook is fixedly arranged on the secondary lining concrete; the hanging rod is connected with the hook and is connected with the stacking platform through the spring balance; and the stress strain gauge is arranged on the surface of the secondary lining concrete. The data of each meter is obtained by loading the stacking platform stage by stage, the actually measured value is compared with a theoretically calculated value, and the bearing capacity of the secondary lining concrete is shown through a linear curve. The bearing capacity of the tunnel secondary lining concrete structure can be effectively tested and detected by the device; and the device is a lossless test detection device, and provides important scientific basis for design, construction and project completion approval without damaging the primary secondary lining concrete structure.
Description
Technical field
The utility model relates to Tunnel Second Lining quality of concrete control field, particularly relates to a kind of Tunnel Second Lining xoncrete structure load carrying capacity test device.
Background technology
At present, in engineerings such as highway, railway, municipal administration, water conservancy, the tunnel is a kind of general structure; The secondary lining xoncrete structure is the agent structure in tunnel; Now secondary lining xoncrete structure conventional design method is to adopt analogy method to design, check through Theoretical Calculation again or through the indoor model test checking, but because geological condition is very complicated; Tunnel surrounding changes frequent; The geologic parameter of Theoretical Calculation or indoor model is difficult to accurately confirm, causes the test findings of Theoretical Calculation or indoor model and actual conditions discrepancy very big, can not reflect the reality of engineering.Simultaneously; The construction quality of tunnel preliminary bracing and the cast in situs of secondary lining concrete also is difficult to guarantee; Just because of the device that at the scene the Tunnel Second Lining xoncrete structure is not carried out at present effective bearingtest; Can't detect its load-bearing capacity, general design is all more conservative, has caused huge waste.When quality inspection is checked and accepted, can not detect its bearing capacity, in case construction is accomplished, can't find also that as defective in quality potential safety hazard can not be got rid of, this also is the multiple one of the main reasons of present tunnel safety accident.
Summary of the invention
The utility model technical matters to be solved provides a kind of Tunnel Second Lining xoncrete structure load carrying capacity test device; Utilize the load-bearing capacity of this device ability efficiency test detection Tunnel Second Lining xoncrete structure, for design, construction and the acceptance of work provide important scientific basis.
The utility model solves the technical scheme that its technical matters adopted: a kind of Tunnel Second Lining xoncrete structure load carrying capacity test device is provided; Comprise pressure cell, hook, peg, spring balance, preloading platform and stress strain guage; Described pressure cell fixedly is embedded between tunnel preliminary bracing and the secondary lining concrete; Described hook is fixed on the secondary lining concrete; Described peg links to each other with hook, and described peg links to each other with the preloading platform through spring balance, and described stress strain guage is installed in the concrete surface of secondary lining.
Described pressure cell is embedded with several in advance, and each pressure cell all is wired on the computing machine.
Described stress strain guage is equipped with several, and each stress strain guage all is wired on the computing machine.
Described hook is respectively installed one about on the same section, and is symmetrically distributed about Tunnel Second Lining concrete axis, and the pre-buried section of described hook is at least 4.
Described hook is made up of a block plate and a U-loop, and two legs of described U-loop are welded on the centre position of steel plate.
Described peg is made up of the I-shaped body of rod and snap close, and the two ends of the described I-shaped body of rod respectively are distributed with a through hole, and a side of said through hole has an opening, and described snap close links to each other with the upper end of opening through bolt after passing a hole of open lower end.
Described preloading platform is made up of joist steel and steel plate, and described several H shaped steel groined type in length and breadth are welded, and face down bonding connects a block plate above that again, and the upper surface of described upside steel plate evenly is equipped with several suspension ring along two long limits.
Beneficial effect
The utility model relates to a kind of Tunnel Second Lining xoncrete structure load carrying capacity test device; Utilize the said device of the utility model can efficiency test to detect the load-bearing capacity of Tunnel Second Lining xoncrete structure; Be a kind of nondestructive test pick-up unit, neither destroy original Tunnel Second Lining xoncrete structure and important scientific basis is provided for again design, construction and completion of works examination.
Description of drawings
Fig. 1 is the described test synoptic diagram of the utility model;
Fig. 2 is the arrangenent diagram of the described test unit of the utility model;
Fig. 3 is the vertical view of the described hook of the utility model;
Fig. 4 is the front view of the described hook of the utility model;
Fig. 5 is the front view of the described peg of the utility model;
Fig. 6 is the lateral plan of the described peg of the utility model;
Fig. 7 is the A-A cut-open view of the described peg of the utility model;
Fig. 8 is the vertical view of the described preloading platform of the utility model;
Fig. 9 is that the A of the described preloading platform of the utility model is to view;
Figure 10 is the described H shaped steel of a utility model groined type preloading platform A-A cut-open view in length and breadth;
Figure 11 is the suspension ring synoptic diagram of the described preloading platform of the utility model;
Figure 12 is the described static load test figure of the utility model.
Embodiment
Below in conjunction with specific embodiment, further set forth the utility model.Should be understood that these embodiment only to be used to the utility model is described and be not used in the restriction the utility model scope.Should be understood that in addition those skilled in the art can do various changes or modification to the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Shown in Fig. 1～12, the embodiment of the utility model relates to a kind of Tunnel Second Lining xoncrete structure load carrying capacity test device, comprises pressure cell 1, hook 2, peg 3, spring balance 4, preloading platform 5 and stress strain guage 6; It is characterized in that described pressure cell 1 fixedly is embedded between tunnel preliminary bracing and the secondary lining concrete, described hook 2 is fixed on the secondary lining concrete; Described peg 3 links to each other with hook 2; Described peg 3 links to each other with preloading platform 5 through spring balance 4, and described stress strain guage 6 is installed in the concrete surface of secondary lining, and described pressure cell 1 is embedded with several in advance; Each pressure cell 1 all is wired on the computing machine; Described stress strain guage 6 is equipped with several, and each stress strain guage 6 all is wired on the computing machine, and described hook 2 is respectively installed one about on the same section; And be symmetrically distributed about Tunnel Second Lining concrete axis; The pre-buried section of said hook is at least 4, and described hook 2 is made up of a block plate and a U-loop, and two legs of described U-loop are welded on the centre position of steel plate.Described peg 3 is made up of I-shaped body of rod 3b and snap close 3a; The two ends of described I-shaped body of rod 3b respectively are distributed with a through hole; One side of said through hole has an opening, and described snap close 3a links to each other with the upper end of opening through bolt after passing a hole of open lower end.Described preloading platform 5 is made up of H shaped steel 5b and steel plate 5c; Described several H shaped steel 5b is the structure that is welded of groined type in length and breadth; Face down bonding meets a block plate 5c above that again, and the upper surface of described upside steel plate 5c evenly is equipped with several 5a suspension ring along two long limits.
Article one, width is 9～10 meters two-lane tunnel; Surrounding rock category is 3 grades, after the tunnel preliminary bracing is accomplished, according to the test detection frequency of Tunnel Second Lining xoncrete structure; Choose the pilot region that a segment length is about 10 meters (template length); In advance pressure cell 1 fixedly is embedded in the tunnel preliminary bracing, quantity is 40～60, and each pressure cell 1 all is wired on the computing machine; When the secondary lining concrete begins to construct, in advance 8～10 hooks 2 fixedly are embedded in the Tunnel Second Lining concrete; During loading test, select secondary lining concrete surface measuring point, paste 40～60 stress strain guages 6; Peg 3, spring balance 4, preloading platform 5 are connected in turn on the hook 2; Select for use the moveable type vehicle to load, load step by step during loading, carry earlier and add to first order load, be offloaded to zero and carry by zero; Carry by zero again and add to second level load, unload to zero year; Apply until all loads and to finish, the reading error of treating each spring balance after each the loading is less than giving the read-record loaded weight at 5% o'clock again; After each loading was stable, the data that will read pressure cell 1 and stress strain guage 6 through computing machine gathered; After site test finishes,, draw the parallel tables of measured value and theoretical analysis and calculation simultaneously, evaluation secondary lining load-bearing capacity through the load test strain of COMPUTER CALCULATION secondary liner structure or distortion measured result ratio (η) with theoretical value.
Article one, width is 14～15 meters tunnel, three tracks; Surrounding rock category is 3 grades, after the tunnel preliminary bracing is accomplished, according to the test detection frequency of Tunnel Second Lining xoncrete structure; Choose the pilot region that a segment length is about 10 meters; In advance pressure cell 1 fixedly is embedded in the tunnel preliminary bracing, quantity is 60～80, and each pressure cell 1 all is wired on the computing machine; When the secondary lining concrete begins to construct, in advance 10～14 hooks 2 fixedly are embedded in the Tunnel Second Lining concrete; During loading test, select secondary lining concrete surface measuring point, paste 60～80 stress strain guages 6; Peg 3, spring balance 4, preloading platform 5 are connected in turn on the hook 2; Select for use the mode of weight preloading to load, load step by step during loading, carry earlier and add to first order load, be offloaded to zero and carry by zero; Carry by zero again and add to second level load, unload to zero year; Apply until all loads and to finish, the reading error of treating each spring balance after each the loading is less than giving the read-record loaded weight at 5% o'clock again; After each loading was stable, the data that will read pressure cell 1 and stress strain guage 6 through computing machine gathered; After site test finishes,, draw the parallel tables of measured value and theoretical analysis and calculation simultaneously, evaluation secondary lining load-bearing capacity through the load test strain of COMPUTER CALCULATION secondary liner structure or distortion measured result ratio (η) with theoretical value.
Claims (7)
1. the test unit of a Tunnel Second Lining xoncrete structure load-bearing capacity; Comprise pressure cell (1), hook (2), peg (3), spring balance (4), preloading platform (5) and stress strain guage (6); It is characterized in that; Described pressure cell (1) fixedly is embedded between tunnel preliminary bracing and the secondary lining concrete, and described hook (2) is fixed on the secondary lining concrete, and described peg (3) links to each other with hook (2); Described peg (3) links to each other with preloading platform (5) through spring balance (4), and described stress strain guage (6) is installed in the concrete surface of secondary lining.
2. the test unit of a kind of Tunnel Second Lining xoncrete structure load-bearing capacity according to claim 1 is characterized in that, described pressure cell (1) is embedded with several in advance, and each pressure cell (1) all is wired on the computing machine.
3. the test unit of a kind of Tunnel Second Lining xoncrete structure load-bearing capacity according to claim 1 is characterized in that, described stress strain guage (6) is equipped with several, and each stress strain guage (6) all is wired on the computing machine.
4. the test unit of a kind of Tunnel Second Lining xoncrete structure load-bearing capacity according to claim 1; It is characterized in that; Described hook (2) is respectively installed one about on the same section; And be symmetrically distributed about Tunnel Second Lining concrete axis, the pre-buried section of described hook (2) is at least 4.
5. the test unit of a kind of Tunnel Second Lining xoncrete structure load-bearing capacity according to claim 1 is characterized in that, described hook (2) is made up of a block plate and a U-loop, and two legs of described U-loop are welded on the centre position of steel plate.
6. the test unit of a kind of Tunnel Second Lining xoncrete structure load-bearing capacity according to claim 1; It is characterized in that; Described peg (3) is made up of the H shaped steel body of rod (3b) and snap close (3a); The two ends of the described H shaped steel body of rod (3b) respectively are distributed with a through hole, and a side of said through hole has an opening, and described snap close (3a) links to each other with the upper end of opening through bolt after passing a hole of open lower end.
7. the test unit of a kind of Tunnel Second Lining xoncrete structure load-bearing capacity according to claim 1; It is characterized in that; Described preloading platform (5) is made up of H shaped steel (5b) and steel plate (5b); Described several H shaped steel (5b) groined type in length and breadth are welded, and face down bonding connects a block plate (5c) above that again, and the upper surface of described upside steel plate (5b) evenly is equipped with several (5a) suspension ring along two long limits.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203977091U CN202305349U (en) | 2011-10-19 | 2011-10-19 | Test device for bearing capacity of tunnel secondary lining concrete structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011203977091U CN202305349U (en) | 2011-10-19 | 2011-10-19 | Test device for bearing capacity of tunnel secondary lining concrete structure |
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| Publication Number | Publication Date |
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| CN202305349U true CN202305349U (en) | 2012-07-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011203977091U Expired - Lifetime CN202305349U (en) | 2011-10-19 | 2011-10-19 | Test device for bearing capacity of tunnel secondary lining concrete structure |
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| Country | Link |
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| CN (1) | CN202305349U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507347A (en) * | 2011-10-19 | 2012-06-20 | 宁波交通工程建设集团有限公司 | Load-carrying capacity test device of tunnel secondary-lining concrete structure |
| CN102866070A (en) * | 2012-08-16 | 2013-01-09 | 浙江交建路桥工程有限公司 | Loading method for bearing strength test for secondary lining concrete structure of tunnel |
-
2011
- 2011-10-19 CN CN2011203977091U patent/CN202305349U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507347A (en) * | 2011-10-19 | 2012-06-20 | 宁波交通工程建设集团有限公司 | Load-carrying capacity test device of tunnel secondary-lining concrete structure |
| CN102866070A (en) * | 2012-08-16 | 2013-01-09 | 浙江交建路桥工程有限公司 | Loading method for bearing strength test for secondary lining concrete structure of tunnel |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170509 Address after: 315124 Zhejiang city in Ningbo province Dongqian Lake resort Mei fang Road No. 12 Co-patentee after: Ningbo Communication Engineering Construction Group Co.,Ltd. Patentee after: Ningbo Traffic Construction Engineering Test Center Co., Ltd. Address before: 315000 Zhejiang Province, Ningbo city Haishu District Yin Feng Road, No. 32-2 Patentee before: Ningbo Communication Engineering Construction Group Co.,Ltd. |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20190214 Address after: 315124 Meifang Road, Dongqianhu Tourist Resort, Ningbo City, Zhejiang Province Patentee after: Ningbo Traffic Construction Engineering Test Center Co., Ltd. Address before: 315124 Meifang Road, Dongqianhu Tourist Resort, Ningbo City, Zhejiang Province Co-patentee before: Ningbo Communication Engineering Construction Group Co.,Ltd. Patentee before: Ningbo Traffic Construction Engineering Test Center Co., Ltd. |
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| TR01 | Transfer of patent right | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120704 |
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| CX01 | Expiry of patent term |