CN111308628A - Protection method for high-speed rail tunnel deformation joint penetrated by embedded sensing optical cable - Google Patents
Protection method for high-speed rail tunnel deformation joint penetrated by embedded sensing optical cable Download PDFInfo
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- CN111308628A CN111308628A CN201911189989.4A CN201911189989A CN111308628A CN 111308628 A CN111308628 A CN 111308628A CN 201911189989 A CN201911189989 A CN 201911189989A CN 111308628 A CN111308628 A CN 111308628A
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- deformation joint
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- sensing optical
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
- G02B6/50—Underground or underwater installation; Installation through tubing, conduits or ducts
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- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/44—Mechanical structures for providing tensile strength and external protection for fibres, e.g. optical transmission cables
- G02B6/4439—Auxiliary devices
- G02B6/4459—Ducts; Conduits; Hollow tubes for air blown fibres
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Abstract
The invention discloses a method for protecting a deformation joint of a high-speed railway tunnel penetrated by an embedded sensing optical cable, which comprises the following steps: i. steel bar binding sensing optical cables are distributed along the longitudinal direction of the tunnel; II, erecting and distributing a spring-shaped steel sleeve at the end part of the tunnel deformation joint first-pouring side structure; iii, reserving a disc-shaped groove at the end part of the side structure of the tunnel deformation joint; and iv, connecting the sensing optical cable with a tunnel deformation joint post-pouring side structure through a spring-shaped steel sleeve. The invention can realize the length redundancy of the optical cable in the deformation joint disc-shaped groove, improves the coordination deformation capability of the optical cable when the deformation joint is opened, closed and dislocated, reduces the fracture risk of the sensing optical cable caused by the relative displacement of the structures at two sides of the deformation joint in the tunnel operation period, and has strong implementability of the adopted protective measures, low cost and small influence on the construction of the main structure of the tunnel.
Description
Technical Field
The invention relates to the field of railway tunnel engineering, in particular to a method for protecting a deformation joint of a high-speed railway tunnel penetrated by an embedded sensing optical cable.
Background
With the rapid development of the high-speed railway industry in China, the number of tunnel projects is greatly increased. Due to the aerodynamic particularity of the high-speed railway tunnel, the tunnel clearance has very strict requirements on pipes, wires and cables which are arranged in a suspended mode, and other pipelines are not allowed to be suspended from the vault to the upper portion of the side wall of the tunnel except cables and equipment related to a contact network in principle, so that the risk that the safe operation of a high-speed train is affected due to the falling of the pipelines is reduced. At present, the vault suspension type longitudinal distributed optical fiber sensing technology which is gradually popularized in highway and subway tunnels can only embed the optical cable through length in tunnel lining concrete in a high-speed railway tunnel.
The tunnel need set up annular movement joint according to the distribution of country rock load, temperature load at every certain distance, and the movement joint can open or compress, close because of structure temperature variation during tunnel operation, also can cause vertical, the horizontal dislocation of movement joint both sides structure because of the country rock reason. The sensing element of the longitudinal distributed sensing optical cable is an optical fiber, the raw material is silicon dioxide, the sensing element is a brittle material, the ductility and the shear resistance are extremely weak, and therefore the protection problem that the sensing optical cable passes through a tunnel deformation joint must be considered when the sensing optical cable is longitudinally installed in tunnel concrete in a longitudinal full-length embedded mode.
At present, no engineering example of a longitudinal through-length embedded sensing optical cable in a high-speed railway tunnel lining exists in China, so that a targeted and implementable protection method for a deformation joint of a high-speed railway tunnel penetrated by an embedded optical cable is required to be provided.
Disclosure of Invention
The invention aims to solve the technical problems and provides a protection method for a deformation joint of a high-speed railway tunnel penetrated by a pre-embedded sensing optical cable.
The invention is realized according to the following technical scheme.
A protection method for a deformation joint of a high-speed railway tunnel penetrated by an embedded sensing optical cable comprises the following steps:
i. steel bar binding sensing optical cables are distributed along the longitudinal direction of the tunnel;
II, erecting and distributing a spring-shaped steel sleeve at the end part of the tunnel deformation joint first-pouring side structure;
iii, reserving a disc-shaped groove at the end part of the side structure of the tunnel deformation joint;
and iv, connecting the sensing optical cable with a tunnel deformation joint post-pouring side structure through a spring-shaped steel sleeve.
And further, arranging sensing optical cables along the longitudinal distribution steel bars of the tunnel in the step i, and fixing the sensing optical cables on the longitudinal distribution steel bars of the tunnel through plastic binding bands.
Furthermore, in the step ii, a spring-shaped steel sleeve is erected and distributed at the end part of the tunnel deformation joint cast side structure, and the sensing optical cable penetrates through the deformation joint in the spring-shaped steel sleeve.
Further, the spring-shaped steel sleeve pipe is poured into the first-pouring side structural concrete of the tunnel deformation joint after the end of the first-pouring side straight line section passes through the sensing optical cable and is plugged by the two-component polysulfide sealant.
Further, disc-shaped foam plastics are pre-adhered to the inner side of the side structure end template which is poured firstly at the tunnel deformation joint in the step iii, a disc-shaped groove is formed at the end part of the side structure which is poured firstly at the tunnel deformation joint, and the center of the disc-shaped groove is located on the axis of the spring-shaped steel sleeve.
And further, in the step iv, the sensing cable extends out of the spring-shaped steel sleeve post-pouring side straight line segment, is bound and fixed with the longitudinal distribution steel bars of the tunnel deformation joint post-pouring side structure, and is poured into the tunnel deformation joint post-pouring side structure concrete.
Further, the post-cast side straight line segment of the spring-shaped steel sleeve is cast into the post-cast side structural concrete of the tunnel deformation joint after the end is plugged by using the two-component polysulfide sealant.
The present invention obtains the following advantageous effects.
The invention ensures that the optical cable has a certain length of redundancy in the reserved disc-shaped groove of the deformation joint, improves the coordinated deformation capacity of the optical cable when the deformation joint is opened, closed and dislocated, reduces the fracture risk of the sensing optical cable caused by the relative displacement of the structures at two sides of the deformation joint in the tunnel operation period, and has strong implementability of the adopted protection measures, low cost and small influence on the construction of the main structure of the tunnel.
Drawings
FIG. 1 is a flow chart of the method of the present invention;
FIG. 2 is a schematic layout of the present invention.
Wherein: 1. a sensing fiber optic cable; 2. firstly pouring a side structure at a tunnel deformation joint;
3. a spring-like steel sleeve; 4. a disc-shaped groove;
5. firstly, casting a side straight line section by using a spring-shaped steel sleeve; 6, casting a side structure after the tunnel deformation joint;
7. and (5) post-casting a side straight line section by using a spring-shaped steel sleeve.
Detailed Description
The present invention will be further illustrated with reference to the following examples.
As shown in fig. 1 and 2, a protection method for a high-speed rail tunnel deformation joint penetrated by an embedded sensing optical cable comprises the following steps:
i. distributing reinforcement sensing optical cables 1 along the longitudinal direction of the tunnel (S1);
and (3) arranging the sensing optical cable 1 along the longitudinal distribution steel bars of the tunnel, and fixing the sensing optical cable 1 on the longitudinal distribution steel bars of the tunnel through a plastic binding belt.
ii, erecting and arranging a spring-shaped steel sleeve 3 at the end part of the tunnel deformation joint first-pouring side structure 2 (S2);
a spring-shaped steel sleeve 3 is erected and distributed at the end part of the tunnel deformation joint firstly-poured side structure 2, and the sensing optical cable 1 penetrates through the deformation joint in the spring-shaped steel sleeve 3. The spring-shaped steel sleeve first-pouring side straight line section 5 is poured into the concrete of the tunnel deformation joint first-pouring side structure 2 by using the two-component polysulfide sealant to plug the end after the sensing optical cable 1 passes through.
iii, reserving a disc-shaped groove 4 at the end part of the tunnel deformation joint first-poured side structure 2 (S3);
disc-shaped foam plastic is pre-pasted on the inner side of the end template of the tunnel deformation joint of the side structure 2 in advance, a disc-shaped groove 4 is formed at the end part of the tunnel deformation joint of the side structure 2 in advance, and the center of the disc-shaped groove 4 is positioned on the axis of the spring-shaped steel sleeve 3.
The sensing optical cable 1 is connected with the tunnel deformation joint post-cast side structure 6 through the spring-shaped steel sleeve 3 (S4);
the sensing optical cable 1 extends out of the spring-shaped steel sleeve post-pouring side straight line segment 7, is bound and fixed with the longitudinal distributed steel bars of the tunnel deformation joint post-pouring side structure 6, and is poured into the concrete of the tunnel deformation joint post-pouring side structure 6. The spring-shaped steel sleeve post-cast side straight line segment 7 is cast into the concrete of the tunnel deformation joint post-cast side structure 6 after the end is plugged by using the two-component polysulfide sealant.
Example 1
A certain newly-built high-speed railway tunnel has beginning-end mileage DK46+ 092-DK 53+300, and the total length of the tunnel between the two tunnels is 7208 m. The design adopts open cut construction. And longitudinally embedding a distributed fire sensing optical cable at the vault of the tunnel.
A protection method for a deformation joint of a high-speed railway tunnel penetrated by an embedded sensing optical cable comprises the following steps:
(i) a steel bar binding sensing optical cable 1 is longitudinally distributed along the vault of the tunnel;
and (3) arranging the sensing optical cable 1 along the longitudinal distributed reinforcing steel bars at the arch top of the tunnel, and fixing the sensing optical cable 1 on the distributed reinforcing steel bars through plastic binding bands.
(ii) Erecting and distributing a spring-shaped steel sleeve 3 at the end part of the tunnel deformation joint first-pouring side structure 2;
the bending radius of the end part of the deformation joint small-mileage side structure is fixed by 100mm in a mode of erecting a stud electric welding, the length of a straight line section is 200mm, the outer diameter of a pipe is 10mm, the spring-shaped steel sleeve 3 is provided with a sensing optical cable 1, the deformation joint is penetrated through the spring-shaped steel sleeve 3, the spring-shaped steel sleeve firstly pours a side straight line section 5, and the end head is sealed by using the two-component polysulfide sealant after the sensing optical cable 1 penetrates through the end head, and the sealing paste is poured into the concrete of the tunnel deformation joint small.
(iii) Firstly, pouring the side structure 2 of the tunnel deformation joint, pre-sticking disc-shaped foam plastics on the inner side of an end mould, and forming a disc-shaped groove 4 at the end part of a lining after pouring concrete;
a disc-shaped foam plastic with the diameter of 30cm and the height of 10cm is pre-adhered to the inner side of the tunnel deformation joint small-mileage side structure end template, a disc-shaped groove 4 is formed in the end portion of the tunnel deformation joint small-mileage side structure, and the center of the disc-shaped groove 4 is located on the axis of the spring-shaped steel sleeve 3.
(iv) The sensing optical cable 1 is poured into a tunnel deformation joint post-pouring side structure 6 through a spring-shaped steel sleeve 3;
the sensing optical cable 1 extends out of the spring-shaped steel sleeve 3, is bound and fixed with the longitudinal distributed steel bars of the tunnel deformation joint large-mileage side structure, and is poured into the tunnel deformation joint large-mileage side structure concrete. The straight line section on the large-mileage side of the spring-shaped steel sleeve is poured into the structural concrete on the large-mileage side of the tunnel deformation joint after the end is blocked by using the two-component polysulfide sealant.
Through the steps, the length redundancy of the optical cable can be realized in the deformation joint disc-shaped groove 4, the coordination deformability of the optical cable during opening, closing and dislocation of the deformation joint is improved, the fracture risk of the sensing optical cable 1 caused by relative displacement of structures on two sides of the deformation joint in the tunnel operation period is reduced, the protection measures are strong in implementability and low in cost, and the influence on the construction of the main structure of the tunnel is small.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (7)
1. A protection method for a deformation joint of a high-speed railway tunnel penetrated by an embedded sensing optical cable is characterized by comprising the following steps: the method comprises the following steps:
i. steel bar binding sensing optical cables are distributed along the longitudinal direction of the tunnel;
II, erecting and distributing a spring-shaped steel sleeve at the end part of the tunnel deformation joint first-pouring side structure;
iii, reserving a disc-shaped groove at the end part of the side structure of the tunnel deformation joint;
and iv, connecting the sensing optical cable with a tunnel deformation joint post-pouring side structure through a spring-shaped steel sleeve.
2. The method for protecting the deformation joint of the high-speed railway tunnel penetrated by the embedded sensing optical cable according to claim 1, wherein the method comprises the following steps: and i, arranging sensing optical cables along the longitudinal distribution reinforcing steel bars of the tunnel, and fixing the sensing optical cables on the longitudinal distribution reinforcing steel bars of the tunnel through plastic binding bands.
3. The method for protecting the deformation joint of the high-speed railway tunnel penetrated by the embedded sensing optical cable according to claim 1, wherein the method comprises the following steps: and in the step ii, erecting and distributing a spring-shaped steel sleeve at the end part of the tunnel deformation joint casting side structure, and enabling the sensing optical cable to penetrate through the deformation joint in the spring-shaped steel sleeve.
4. The method for protecting the deformation joint of the high-speed railway tunnel penetrated by the embedded sensing optical cable according to claim 3, wherein the method comprises the following steps: the end of the straight line section on the cast side of the spring-shaped steel sleeve is plugged by using the two-component polysulfide sealant after the sensing optical cable passes through the straight line section, and the straight line section is cast into the concrete of the cast side structure of the tunnel deformation joint.
5. The method for protecting the deformation joint of the high-speed railway tunnel penetrated by the embedded sensing optical cable according to claim 1, wherein the method comprises the following steps: and step iii, pre-sticking disc-shaped foam plastics on the inner side of the side structure end template of the tunnel deformation joint first pouring, forming a disc-shaped groove at the end part of the side structure of the tunnel deformation joint first pouring, and positioning the center of the disc-shaped groove on the axis of the spring-shaped steel sleeve.
6. The method for protecting the deformation joint of the high-speed railway tunnel penetrated by the embedded sensing optical cable according to claim 1, wherein the method comprises the following steps: and step iv, the sensing cable extends out of the straight line section of the post-pouring side of the spring-shaped steel sleeve, is bound and fixed with the longitudinal distribution steel bars of the post-pouring side structure of the tunnel deformation joint, and is poured into the concrete of the post-pouring side structure of the tunnel deformation joint.
7. The method for protecting the deformation joint of the high-speed railway tunnel penetrated by the embedded sensing optical cable according to claim 6, wherein the method comprises the following steps: and the spring-shaped steel sleeve post-cast side straight line segment is cast into the tunnel deformation joint post-cast side structural concrete after the end is plugged by using the two-component polysulfide sealant.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911189989.4A CN111308628A (en) | 2019-11-28 | 2019-11-28 | Protection method for high-speed rail tunnel deformation joint penetrated by embedded sensing optical cable |
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| CN201911189989.4A CN111308628A (en) | 2019-11-28 | 2019-11-28 | Protection method for high-speed rail tunnel deformation joint penetrated by embedded sensing optical cable |
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| CN111308628A true CN111308628A (en) | 2020-06-19 |
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| CN201911189989.4A Pending CN111308628A (en) | 2019-11-28 | 2019-11-28 | Protection method for high-speed rail tunnel deformation joint penetrated by embedded sensing optical cable |
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Citations (7)
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|---|---|---|---|---|
| US20070077125A1 (en) * | 2004-03-12 | 2007-04-05 | Wien Kanal-Abwassertechnologien Gesmbh | Cable laying configuration |
| CN102983909A (en) * | 2012-10-09 | 2013-03-20 | 邓小健 | Protecting device capable of preventing mine and tunnel from accident through communication cables |
| CN106772844A (en) * | 2015-11-24 | 2017-05-31 | 泰科电子(上海)有限公司 | Insulator and its manufacture method |
| CN109931875A (en) * | 2017-12-16 | 2019-06-25 | 薛思源 | A kind of buried type geotechnical engineering monitoring device |
| CN209230547U (en) * | 2019-01-29 | 2019-08-09 | 哈尔滨工业大学 | Subway tunnel structure monitoring crosses expansion joint protective device with distributed Brillouin fiber optic |
| CN110159306A (en) * | 2019-05-09 | 2019-08-23 | 山东大学 | Secondary lining flexible joint device and construction method for Tunnel Passing active fault |
| CN110439594A (en) * | 2019-08-28 | 2019-11-12 | 中铁第四勘察设计院集团有限公司 | A kind of tunnel deformation crack structure and construction method |
-
2019
- 2019-11-28 CN CN201911189989.4A patent/CN111308628A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070077125A1 (en) * | 2004-03-12 | 2007-04-05 | Wien Kanal-Abwassertechnologien Gesmbh | Cable laying configuration |
| CN102983909A (en) * | 2012-10-09 | 2013-03-20 | 邓小健 | Protecting device capable of preventing mine and tunnel from accident through communication cables |
| CN106772844A (en) * | 2015-11-24 | 2017-05-31 | 泰科电子(上海)有限公司 | Insulator and its manufacture method |
| CN109931875A (en) * | 2017-12-16 | 2019-06-25 | 薛思源 | A kind of buried type geotechnical engineering monitoring device |
| CN209230547U (en) * | 2019-01-29 | 2019-08-09 | 哈尔滨工业大学 | Subway tunnel structure monitoring crosses expansion joint protective device with distributed Brillouin fiber optic |
| CN110159306A (en) * | 2019-05-09 | 2019-08-23 | 山东大学 | Secondary lining flexible joint device and construction method for Tunnel Passing active fault |
| CN110439594A (en) * | 2019-08-28 | 2019-11-12 | 中铁第四勘察设计院集团有限公司 | A kind of tunnel deformation crack structure and construction method |
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Application publication date: 20200619 |