CN108678782B - High water pressure shield tunnel segment joint multichannel watertight fittings of slip casting hole is reserved - Google Patents
High water pressure shield tunnel segment joint multichannel watertight fittings of slip casting hole is reserved Download PDFInfo
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- CN108678782B CN108678782B CN201810448368.2A CN201810448368A CN108678782B CN 108678782 B CN108678782 B CN 108678782B CN 201810448368 A CN201810448368 A CN 201810448368A CN 108678782 B CN108678782 B CN 108678782B
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- sealing gasket
- shield tunnel
- waterproof
- channel
- tunnel segment
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 19
- 238000007569 slipcasting Methods 0.000 title description 4
- 238000007789 sealing Methods 0.000 claims abstract description 107
- 239000000463 material Substances 0.000 claims description 7
- 229920002943 EPDM rubber Polymers 0.000 claims description 5
- NIXOWILDQLNWCW-UHFFFAOYSA-M Acrylate Chemical compound [O-]C(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-M 0.000 claims description 3
- 229920002635 polyurethane Polymers 0.000 claims description 3
- 239000004814 polyurethane Substances 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 22
- 230000007774 longterm Effects 0.000 description 10
- 238000010276 construction Methods 0.000 description 9
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 238000010008 shearing Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000004078 waterproofing Methods 0.000 description 3
- 230000006872 improvement Effects 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 230000008439 repair process Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000010485 coping Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 201000010099 disease Diseases 0.000 description 1
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 239000010959 steel Substances 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
- E21D11/38—Waterproofing; Heat insulating; Soundproofing; Electric insulating
- E21D11/385—Sealing means positioned between adjacent lining members
Landscapes
- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to a multi-channel waterproof device for a high-water-pressure shield tunnel segment joint of a reserved grouting hole, which is used for conducting waterproof sealing on a joint between a first shield tunnel segment and a second shield tunnel segment which are adjacent. Compared with the prior art, the invention has the advantages of multiple waterproof systems, cost reduction, adjustable design index of the elastic sealing gasket and the like.
Description
Technical Field
The invention relates to the field of shield tunnel waterproof engineering, in particular to a multichannel waterproof device for a segment joint of a high-water pressure shield tunnel with a reserved grouting hole.
Background
With the continuous development of underground space, the space range of human activities is continuously expanded, and the shield tunnel is widely applied to urban rail transit tunnels and river-crossing cross-sea tunnels due to the advantages of high construction speed, high degree of mechanization, small construction influence and the like. Along with the continuous improvement of the technical level and the continuous improvement of the use demands, the shield tunnel is continuously developed towards the directions of long distance, large section and high water pressure, so that the technical challenges are more and more difficult.
The waterproof design mainly works as a part of influencing the long-term performance of the shield tunnel, and attracts attention of a plurality of students and experts due to frequent occurrence of water leakage problems and diseases of the shield tunnel. Due to the continuous increase of the design water pressure, only a single-channel waterproof design is adopted in the small-diameter shield tunnel initially, and a double-channel waterproof design scheme is generally adopted in the large-diameter high-water-pressure shield tunnel at present.
However, in the near future, the design water pressure will be continuously increased, and if the thickness, the width and the hardness of the sealing gasket are required to be continuously increased according to the traditional double-channel waterproof design scheme, the closing compression force of the sealing gasket is continuously increased, which is extremely unfavorable for the shearing resistance of the corner of the duct piece and the long-term performance of the shield tunnel. The current technology has the following limitations:
(1) The assembly force of the shield machine is insufficient to meet the closing compression force of the sealing gasket
The high water pressure means that the gasket under pressure requires a higher peak contact stress and thus the closing compression force required for the gasket increases. The design scheme of the double-channel sealing gasket means that the assembly force requirement on the shield machine is greatly improved. The seal cross section and stiffness are often limited by the closing compression forces during the process of optimal design.
(2) The local shearing force of the corner of the segment is large
The sealing gasket needs high contact stress, which means that the groove of the pipe piece corner is also subjected to larger corner shearing stress, and the pipe piece corner is easily damaged due to improper construction in actual engineering, so that the pipe piece joint waterproof effect is directly affected.
(3) Too large a safety factor due to consideration of long-term performance effects
For general water pressure, the safety coefficient is usually 2.0 according to the specification, however, when the actual water pressure of 1.0MPa or even higher is faced, the safety coefficient of 2.0 greatly improves the requirement of the pipe piece joint design water pressure. The sealing gasket section optimization design work is challenged greatly.
How to reasonably carry out the waterproof design of the segment joint and how to reasonably consider the design period of the shield tunnel for 100 years, etc., is a problem that has to be considered in the design of the shield tunnel with long distance, large section and high water pressure in the future. Therefore, a design method capable of meeting the short-term waterproof design requirement of the shield tunnel joint and considering the long-term waterproof performance of the joint is needed to be designed.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide the multi-channel waterproof device for the segment joint of the high-water-pressure shield tunnel with the reserved grouting holes.
The aim of the invention can be achieved by the following technical scheme:
The utility model provides a high water pressure shield tunnel section of jurisdiction seam multichannel watertight fittings of slip casting hole is reserved for seal in waterproof to the seam between adjacent first shield tunnel section of jurisdiction and the second shield tunnel section of jurisdiction, its characterized in that, this structure is including setting up the first lane elastic sealing pad waterproof construction at the seam outer lane, the second lane elastic sealing pad waterproof construction that sets up at the seam inner lane and set up the third way slip casting layer waterproof construction in the waterproof sealed space that first lane elastic sealing pad waterproof construction and second were sealed and are filled up waterproof construction formation.
The first elastic sealing gasket waterproof structure comprises a first outer channel sealing gasket groove arranged on a first shield tunnel segment, a first outer channel elastic sealing gasket adhered to the first outer channel sealing gasket groove, a second outer channel sealing gasket groove arranged on a second shield tunnel segment and a second outer channel elastic sealing gasket adhered to the second outer channel sealing gasket groove, wherein the first outer channel elastic sealing gasket and the second outer channel elastic sealing gasket are oppositely arranged and are in pressing sealing.
The second elastic sealing gasket waterproof structure comprises a first inner sealing gasket groove arranged on a first shield tunnel segment, a first inner sealing gasket adhered to the first inner sealing gasket groove, a second inner sealing gasket groove arranged on a second shield tunnel segment and a second inner sealing gasket adhered to the second inner sealing gasket groove, wherein the first inner sealing gasket and the second inner sealing gasket are oppositely arranged and are in pressing sealing.
The third grouting layer waterproof structure comprises a first pre-buried grouting pipeline arranged on the first shield tunnel segment and a second pre-buried grouting pipeline arranged on the second shield tunnel segment, wherein the first pre-buried grouting pipeline and the second pre-buried grouting pipeline are respectively communicated with the waterproof sealing space and are used for filling grouting materials into the waterproof sealing space.
The first outer channel elastic sealing gasket and the second outer channel elastic sealing gasket are ethylene propylene diene monomer rubber sealing gaskets.
The first inner channel elastic sealing gasket and the second inner channel elastic sealing gasket are ethylene propylene diene monomer rubber sealing gaskets.
The grouting material comprises polyurethane and acrylate.
Compared with the prior art, the invention has the following advantages:
1. multiple systems commonly bear long-term operational risks:
The third grouting layer waterproof system increases the flexibility of long-term waterproof design, and grouting quantity and grouting positions can be adjusted at any time through the pre-buried grouting pipeline. Multiple systems together bear the long-term risk of seam waterproofing.
2. Grouting repair is convenient, and operation and maintenance cost is reduced:
Due to the design of the embedded pipeline, a convenient channel is provided for grouting treatment in future. The time cost and the construction cost of punching grouting are greatly reduced.
3. The design index of the elastic sealing gasket can properly reduce the consideration of long-term performance:
the risk harm of the long-term performance of the sealing gasket is reduced due to the reserved grouting system, so that the safety coefficient of the sealing gasket can be properly adjusted, the long-term performance is comprehensively considered, the value is generally about 2.0, and the waterproof performance index of the shield tunnel joint aiming at high water pressure can be properly reduced. Therefore, the problems of limited assembly force, partial shearing of the tube sheets and the like can be properly solved
Drawings
FIG. 1 is a schematic diagram of the structure of the present invention.
FIG. 2 is a schematic view of a first resilient gasket waterproof structure of the present invention.
FIG. 3 is a schematic view of a second elastic gasket waterproof structure according to the present invention.
Fig. 4 is a schematic three-dimensional structure of the present invention.
The figure indicates:
1. The first shield tunnel segment, 2, the second shield tunnel segment, 3, a first elastic sealing gasket waterproof structure, 4, a second elastic sealing gasket waterproof structure, 5, a third grouting layer waterproof structure, 11, a first outer sealing gasket groove, 12, a first inner sealing gasket groove, 13, a first pre-buried grouting pipeline, 21, a second outer sealing gasket groove, 22, a second inner sealing gasket groove, 23, a second pre-buried grouting pipeline, 31, a first outer sealing gasket, 32, a second outer sealing gasket, 41, a first inner sealing gasket, 42 and a second inner sealing gasket.
Detailed Description
The invention will now be described in detail with reference to the drawings and specific examples.
Other advantages and effects of the present invention will become apparent to those skilled in the art from the following disclosure, which describes the embodiments of the present invention with reference to specific examples. The invention may be practiced or carried out in other embodiments that depart from the specific details, and the details of the present description may be modified or varied from the spirit and scope of the present invention.
It should be understood that the structures, proportions, sizes, etc. shown in the drawings are for illustration purposes only and should not be construed as limiting the invention to the extent that it can be practiced, since modifications, changes in the proportions, or otherwise, used in the practice of the invention, are not intended to be critical to the essential characteristics of the invention, but are intended to fall within the spirit and scope of the invention.
Example 1:
As shown in fig. 1 to 4, the multi-channel waterproof device for the segment joint of the high water pressure shield tunnel of the reserved grouting hole comprises: the device comprises a first shield tunnel segment (1), a second shield tunnel segment (2), a first elastic sealing gasket waterproof structure (3), a second elastic sealing gasket waterproof structure (4) and a third grouting layer waterproof structure (5). The first shield tunnel segment (1) is provided with a first outer channel sealing gasket groove (11), a first inner channel sealing gasket groove (12) and a first pre-buried grouting pipeline (13). The second shield tunnel segment (2) is provided with a second outer channel sealing gasket groove (21), a second inner channel sealing gasket groove (22) and a dell pre-buried grouting pipeline (23).
The first elastic sealing gasket waterproof structure (3) is formed by oppositely pressing a first outer channel elastic sealing gasket (31) adhered to a first outer channel sealing gasket groove (11) of a first shield tunnel segment (1) and a second outer channel elastic sealing gasket (32) adhered to a second outer channel sealing gasket groove (21) of a second shield tunnel segment (2).
The second elastic sealing gasket waterproof structure (4) is formed by pressing a first inner-channel elastic sealing gasket (41) adhered to a first inner-channel sealing gasket groove (12) of the first shield tunnel segment (1) and a second outer-channel elastic sealing gasket (42) adhered to a second inner-channel sealing gasket groove (22) of the second shield tunnel segment (2).
The elastic sealing gasket body is made of ethylene propylene diene monomer rubber material and has high durability. The shape and the size of the section type of the steel plate are different according to engineering conditions.
The third grouting layer waterproof structure (5) is formed by grouting through grouting pipelines pre-buried in the first shield tunnel segment (1) and the second shield tunnel segment (2)
Grouting materials include, but are not limited to, polyurethane, acrylate, and the like.
The specific use process of the invention is as follows:
(1) Manufacturing and designing an embedded part: according to the duct piece size, manufacturing a pre-buried pipeline capable of being communicated with the joint middle cavity as shown in the figure, wherein the shape is not limited to the shape shown in the figure;
(2) Binding the embedded part and the reinforcement cage together, and pouring the binding part and the reinforcement cage into the lining segment;
(3) When the seam is waterproof, the pre-buried grouting pipeline interface is closed; when the joint is waterproof and invalid, grouting waterproof repair materials are injected into the joint cavity through the embedded grouting pipeline;
(4) And after the joint leakage water is effectively treated, closing the pre-buried grouting pipeline interface again.
The above embodiments are merely illustrative of the principles of the present invention and its effectiveness, and are not intended to limit the invention. Modifications and variations may be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the invention. Accordingly, it is intended that all equivalent modifications and variations of the invention be covered by the claims, which are within the ordinary skill of the art, be within the spirit and scope of the present disclosure.
The invention discloses a multi-channel waterproof device for a segment joint of a high-water-pressure shield tunnel with a reserved grouting hole, and provides a waterproof scheme design thought and a solution for coping with challenges brought by increasingly complex hydrogeological conditions and increasingly designed water pressure of a conventional shield tunnel. The multi-channel waterproof reserved grouting holes are arranged between two adjacent shield tunnel segments and comprise a first elastic sealing gasket waterproof system at the outer side of a lining, a second elastic sealing gasket waterproof system at the inner side of the lining and a third grouting layer waterproof system formed by grouting through pre-buried grouting pipes. Two sealing gasket grooves and a pre-buried grouting pipeline are arranged in each duct piece. On the basis of the double-channel waterproof design scheme commonly adopted in the current high-water-pressure shield tunnel, the grouting pipeline is pre-embedded in the duct piece, a waterproof measure is additionally arranged in the duct piece joint, and a new design thought and technical reserve are provided for the higher-water-pressure shield tunnel in the future. Compared with the single-channel or double-channel sealing gasket for waterproofing, the invention increases a waterproofing reserve, and simultaneously provides a reserved channel for the later-stage joint water leakage treatment, thereby greatly saving the cost of operation and maintenance.
Claims (4)
1. The multi-channel waterproof device for the high-water pressure shield tunnel segment joint of the reserved grouting holes is used for conducting waterproof sealing on the joint between the adjacent first shield tunnel segment (1) and the adjacent second shield tunnel segment (2), and is characterized by comprising a first elastic sealing gasket waterproof structure (3) arranged on the outer channel of the joint, a second elastic sealing gasket waterproof structure (4) arranged on the inner channel of the joint and a third grouting layer waterproof structure (5) arranged in a waterproof sealing space formed by the first elastic sealing gasket waterproof structure (3) and the second elastic sealing gasket waterproof structure (4);
the first outer channel sealing gasket waterproof structure (3) comprises a first outer channel sealing gasket groove (11) arranged on a first shield tunnel segment (1), a first outer channel sealing gasket (31) adhered in the first outer channel sealing gasket groove (11), a second outer channel sealing gasket groove (21) arranged on a second shield tunnel segment (2) and a second outer channel sealing gasket (32) adhered in the second outer channel sealing gasket groove (21), wherein the first outer channel sealing gasket (31) and the second outer channel sealing gasket (32) are oppositely arranged and pressed for sealing;
The second elastic sealing gasket waterproof structure (4) comprises a first inner sealing gasket groove (12) arranged on the first shield tunnel segment (1), a first inner sealing gasket (41) adhered in the first inner sealing gasket groove (12), a second inner sealing gasket groove (22) arranged on the second shield tunnel segment (2) and a second inner sealing gasket (42) adhered in the second inner sealing gasket groove (22), wherein the first inner sealing gasket (41) and the second inner sealing gasket (42) are oppositely arranged and pressed for sealing;
The third grouting layer waterproof structure (5) comprises a first pre-buried grouting pipeline (13) arranged on the first shield tunnel segment (1) and a second pre-buried grouting pipeline (23) arranged on the second shield tunnel segment (2), wherein the first pre-buried grouting pipeline (13) and the second pre-buried grouting pipeline (23) are respectively communicated with the waterproof sealing space and are used for filling grouting materials into the waterproof sealing space.
2. The multi-channel waterproof device for the segment joint of the high-water-pressure shield tunnel with the reserved grouting holes according to claim 1, wherein the first outer channel elastic sealing gasket (31) and the second outer channel elastic sealing gasket (32) are ethylene propylene diene monomer rubber sealing gaskets.
3. The multi-channel waterproof device for the segment joint of the high-water-pressure shield tunnel with the reserved grouting holes according to claim 1, wherein the first inner channel elastic sealing gasket (41) and the second inner channel elastic sealing gasket (42) are ethylene propylene diene monomer rubber sealing gaskets.
4. The multi-channel waterproof device for the segment joint of the high-water-pressure shield tunnel with the reserved grouting holes, which is characterized by comprising grouting material polyurethane and acrylate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810448368.2A CN108678782B (en) | 2018-05-11 | 2018-05-11 | High water pressure shield tunnel segment joint multichannel watertight fittings of slip casting hole is reserved |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810448368.2A CN108678782B (en) | 2018-05-11 | 2018-05-11 | High water pressure shield tunnel segment joint multichannel watertight fittings of slip casting hole is reserved |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108678782A CN108678782A (en) | 2018-10-19 |
| CN108678782B true CN108678782B (en) | 2024-05-31 |
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| CN201810448368.2A Active CN108678782B (en) | 2018-05-11 | 2018-05-11 | High water pressure shield tunnel segment joint multichannel watertight fittings of slip casting hole is reserved |
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|---|---|---|---|---|
| CN110259488B (en) * | 2019-07-26 | 2024-09-03 | 中铁第四勘察设计院集团有限公司 | Rear embedded shield tunnel elastic sealing gasket, sealing structure and construction method |
| CN110439037A (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 prefabricated waterproof construction of open trench tunnel deformation joint and method |
| CN110565702A (en) * | 2019-09-12 | 2019-12-13 | 上海建工七建集团有限公司 | Water-stopping steel plate abutted seam structure and construction method thereof |
| CN110821518A (en) * | 2019-12-10 | 2020-02-21 | 中铁十九局集团轨道交通工程有限公司 | Grouting plugging waterproof shield segment structure and construction method thereof |
| CN111119953A (en) * | 2020-01-20 | 2020-05-08 | 杭州临安中民筑友智造科技有限公司 | Segment waterproof structure for opening pipe joints and construction method |
| CN117868912B (en) * | 2024-03-13 | 2024-06-25 | 河南隧通机械有限公司 | Shield tunnel segment water stop ring device |
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| CN108678782A (en) | 2018-10-19 |
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