CN113294172A - High-water-pressure-resistant shield segment bolt hole combined type sealing structure - Google Patents
High-water-pressure-resistant shield segment bolt hole combined type sealing structure Download PDFInfo
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- CN113294172A CN113294172A CN202110640726.1A CN202110640726A CN113294172A CN 113294172 A CN113294172 A CN 113294172A CN 202110640726 A CN202110640726 A CN 202110640726A CN 113294172 A CN113294172 A CN 113294172A
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- anchoring
- groove
- bolt hole
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- 238000007789 sealing Methods 0.000 title claims abstract description 48
- 238000004873 anchoring Methods 0.000 claims abstract description 63
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000000463 material Substances 0.000 claims abstract description 25
- 238000005056 compaction Methods 0.000 claims abstract description 18
- 239000002131 composite material Substances 0.000 claims abstract description 12
- 229920001971 elastomer Polymers 0.000 claims description 37
- 230000035515 penetration Effects 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 abstract description 5
- 230000008569 process Effects 0.000 abstract description 4
- 238000005260 corrosion Methods 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 8
- 229920002943 EPDM rubber Polymers 0.000 description 5
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 238000010276 construction Methods 0.000 description 3
- 230000003993 interaction Effects 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 238000007792 addition Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Images
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
- E21D11/083—Methods or devices for joining adjacent concrete segments
-
- 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
- E21D11/386—Sealing means positioned between adjacent lining members inflatable sealing means
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- 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 high-water-pressure-resistant shield segment bolt hole combined type sealing structure which comprises a sealing element, a step anchoring bolt, a bolt anchoring end segment structure and a bolt non-anchoring end segment structure, wherein the step anchoring bolt is arranged on the sealing element; the sealing element comprises a cylindrical compaction section and an annular gasket; the step anchor bolt comprises a small-head anchor section, a small-head free section, a large-head free section and a fastener; an anchoring end groove matched with the small-head anchoring section is arranged in the bolt anchoring end pipe piece structure, and a T-shaped groove matched with the sealing element and a through groove matched with the large-head free section are arranged in the bolt non-anchoring end pipe piece structure. The invention is suitable for the waterproof design of the shield segment bolt hole under the high water pressure environment, achieves the active and passive composite waterproof purpose through the mutual extrusion action relationship of the sealing element and the free section of the step anchor bolt and under the assistance of the water expansion type material layer, has simple process and strong practicability, and can improve the anti-corrosion capability and durability of the shield tunnel under the high water pressure environment.
Description
Technical Field
The invention relates to the field of shield tunnel construction, in particular to a high-water-pressure-resistant shield segment bolt hole combined sealing structure which is good in waterproof effect, simple in process and strong in implementability.
Background
With the rapid development of urban infrastructure, the river-crossing and sea-crossing tunnel projects in China are more and more, and the tunnel design and construction technology is gradually explored towards the direction of larger diameter, deeper soil covering and ultrahigh water pressure. The shield tunnel is usually assembled by a plurality of segments, and the segments are connected with each other by bolts, so that a plurality of seams inevitably exist between the segments. However, once the water leakage phenomenon occurs at the segment joint, the operation safety of the shield tunnel at the later stage is greatly threatened.
The shield tunnel segment seam waterproof system mainly comprises two aspects: (1) a segment seam waterproof system; (2) a bolt hole waterproofing system; the common pipe piece joint waterproof system mainly comprises a water swelling water stop strip and an ethylene propylene diene monomer elastic rubber pad, and two ethylene propylene diene monomer elastic rubber pads are considered to be adopted in an ultrahigh water pressure environment; the bolt hole waterproof system is characterized in that an Ethylene Propylene Diene Monomer (EPDM) ring is arranged at the end face of each bolt hole and the end face of each pipe piece, and a waterproof effect is achieved through mutual extrusion acting force.
For the waterproof system of the shield tunnel joint and the bolt hole, the number of waterproof channels and the size and the shape of the rubber pad can be increased by considering the segment joint, so that the purpose of resisting ultrahigh water pressure is achieved, but the bolt hole is limited by implementation space, and a treatment scheme aiming at the high water pressure environment is not provided at present. Therefore, how to solve the waterproof problem of the shield segment bolt hole under the high water pressure environment is a difficult problem which needs to be solved urgently by a shield tunnel segment joint waterproof system.
Disclosure of Invention
In order to overcome the defects and shortcomings of the existing shield tunnel segment joint waterproof system, the invention provides the high-water-pressure-resistant shield segment bolt hole combined type sealing structure which is good in waterproof effect, simple in process and strong in implementability.
The technical scheme adopted by the invention for solving the technical problems is as follows: a high water pressure resistant shield segment bolt hole combined type sealing structure comprises a sealing element, a step anchoring bolt, a bolt anchoring end segment structure and a bolt non-anchoring end segment structure; wherein:
the sealing element comprises a cylindrical compaction section, and an annular gasket is arranged at the bottom of the cylindrical compaction section;
the step anchor bolt consists of a small-head anchor section, a small-head free section, a large-head free section and a fastener which are connected in sequence;
an anchoring end groove matched with the small-head anchoring section is arranged in the bolt anchoring end segment structure;
a T-shaped groove matched with the sealing element and a through groove matched with the large-head free section are formed in the non-anchoring end pipe piece structure of the bolt;
the sealing element is arranged in the T-shaped groove, the step anchoring bolt is sequentially inserted into the through groove, the cylindrical compaction section and the anchoring end groove, and the bolt anchoring end segment structure and the bolt non-anchoring end segment structure are spliced and fixed.
Preferably, the cylindrical compacting section comprises a water-swelling material layer, the outer layer of the water-swelling material layer is coated with a high-resilience rubber material layer, and the inner wall of the high-resilience rubber material layer is uniformly provided with penetration holes. Wherein the high-resilience rubber material layer is made of ethylene propylene diene monomer high-elasticity rubber.
Preferably, one side of the annular gasket, which is in contact with the bolt anchoring end segment structure, is provided with an annular bulge.
Preferably, the fastener comprises a bolt gasket, a nut and a high resilience rubber ring, and the high resilience rubber ring is arranged at the end part of the through groove of the non-anchoring end segment structure of the bolt.
Preferably, the high-resilience rubber ring is in a circular truncated cone shape, and one end of the through groove is provided with a conical groove matched with the circular truncated cone-shaped high-resilience rubber ring.
Preferably, one end of the T-shaped groove is provided with an inclined plane connected with the through groove, and the other end of the T-shaped groove is provided with a conical groove matched with the annular gasket.
Preferably, the cylindrical compaction section and the T-shaped groove are connected in an adhesive manner.
Compared with the prior art, the invention has the following advantages and effects:
1. in the high water pressure resistant shield segment bolt hole combined type sealing structure, the sealing element comprises a cylindrical compaction section, the bottom of the cylindrical compaction section is provided with the annular gasket, and the side, which is contacted with the bolt anchoring end segment structure, of the annular gasket is provided with the annular bulge, so that when the step anchoring bolt is used for splicing and fixing the bolt anchoring end segment structure and the bolt non-anchoring end segment structure, the mutual compaction acting force generated between the segments is firmly fixed, and a first active waterproof is formed.
2. In the high water pressure resistant shield segment bolt hole combined type sealing structure, the step anchoring bolt consists of a small-head anchoring section, a small-head free section, a large-head free section and a fastener, an anchoring end groove matched with the small-head anchoring section is arranged in a bolt anchoring end segment structure, a T-shaped groove matched with a sealing element and a through groove matched with the large-head free section are arranged in a bolt non-anchoring end segment structure, when the step anchoring bolt is connected with two shield segments, the small-head anchoring section is matched and connected with the anchoring end groove, the small-head free section is in adhesive connection with a cylindrical compaction section arranged in the T-shaped groove, the large-head free section is in adhesive connection with the through groove, and contact extrusion acting force is generated mutually to form a second active waterproof.
3. According to the high water pressure resistant shield segment bolt hole combined type sealing structure, the cylindrical compaction section comprises the water-swelling type material layer, the high resilience rubber material layer is coated and arranged on the outer layer of the water-swelling type material layer, the inner wall of the high resilience rubber material layer is uniformly provided with the permeation holes, after external water enters the bolt hole, water flow reacts with the water-swelling type material layer through the permeation holes of the high resilience rubber material layer to generate outward expansion force, the contact extrusion acting force between the sealing element and the segment structure is further increased, and a third passive waterproof layer is formed.
4. In the high water pressure resistant shield segment bolt hole combined type sealing structure, the fastener consists of a bolt gasket, a nut and a round table-shaped high-resilience rubber ring, one end of a through groove of a segment structure at the non-anchoring end of the bolt is provided with a conical groove matched with the high-resilience rubber ring, the high-resilience rubber ring is fixed with the segment structure at the non-anchoring end of the bolt, and a fourth active waterproof channel is formed through interaction force.
5. In conclusion, the invention is suitable for a bolt waterproof system in a high water pressure environment, on the basis of the existing bolt hole waterproof design scheme, a T-shaped structural surface is adopted on the bolt hole structural form to meet the high water pressure waterproof requirement as much as possible according to the prefabricated segment structure and the waterproof grade requirement, and the high-resilience rubber ring on the end surface of the outer side segment is assisted to achieve the aim of main and passive combined high-standard waterproof through the interaction relation between the main and passive combined composite waterproof material and the free section of the step anchor bolt, so that the cost is effectively saved, the process is simple, the engineering quality is controllable, the practicability is strong, the bolt hole waterproof effect is good, and the problem of poor bolt hole waterproof effect in the high water pressure environment is effectively solved.
Drawings
In order to more clearly illustrate the technical solutions in the present embodiment or the prior art, the drawings needed to be used in the description of the embodiment or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings according to these drawings without inventive labor.
Fig. 1 is a schematic cross-sectional view of a high water pressure resistant shield segment bolt hole composite sealing structure according to an embodiment of the present invention;
FIG. 2 is a schematic sectional view of a segment structure at the bolt anchoring end;
FIG. 3 is a schematic sectional view of a non-anchored segment structure of a bolt;
FIG. 4 is a schematic view of a step anchor bolt;
FIG. 5 is a schematic view of a sealing member;
FIG. 6 is a top view of the sealing member;
FIG. 7 is a schematic cross-sectional view of a sealing member;
FIG. 8 is an enlarged view of portion A of FIG. 1;
FIG. 9 is a schematic cross-sectional view of a high resilience rubber ring;
fig. 10 is a top view of a high resilience rubber ring.
Description of reference numerals: 1-a bolt anchoring end segment structure; 2-a bolt non-anchoring end segment structure; 3-T-shaped grooves; 4-a sealing element; 5-inclined plane; 6-step anchor bolts; 7-anchoring end groove; 8-through grooves; 9-small head anchoring section; 10-small head free section; 11-big head free section; 12-bolt washer; 13-a nut; 14-an annular gasket; 15-cylindrical compacting section; 16-a permeate pore; 17-a layer of high resilience rubber material; 18-a layer of water-swellable material; 19-an annular projection; 20-high resilience rubber ring; 21-tapered groove.
Detailed Description
The present invention will be described in further detail with reference to the following examples, which are illustrative of the present invention and are not to be construed as being limited thereto.
Example 1: as shown in fig. 1 to 7, a high water pressure resistant shield segment bolt hole composite sealing structure comprises a sealing element 4, a step anchor bolt 6, a bolt anchoring end segment structure 1 and a bolt non-anchoring end segment structure 2; wherein:
the sealing element 4 comprises a cylindrical compaction section 15, and the bottom of the cylindrical compaction section 15 is provided with an annular gasket 14; the step anchor bolt 6 consists of a small-head anchor section 9, a small-head free section 10, a large-head free section 11 and a fastener which are connected in sequence; an anchoring end groove 7 matched with the small-head anchoring section 9 is arranged in the bolt anchoring end segment structure 1; a T-shaped groove 3 matched with the sealing element 4 and a through groove 8 matched with the large-head free section 11 are arranged in the bolt non-anchoring end segment structure 2; sealing element 4 sets up in T type recess 3, step anchor bolt 6 pegs graft in proper order and sets up in logical groove 8, the close section 15 of cylindricality compaction and anchor end recess 7, will bolt anchor end section of jurisdiction structure 1 splices fixedly with bolt non-anchor end section of jurisdiction structure 2.
As shown in fig. 5, in this embodiment 1, the cylindrical compact section 15 includes a water-swellable material layer 18, an outer layer of the water-swellable material layer 18 is covered with a high-resilience rubber material layer 17, penetration holes 16 are uniformly distributed on an inner wall of the high-resilience rubber material layer 17, and an annular protrusion 19 is disposed on a side of the annular gasket 14 contacting the bolt anchoring end segment structure 1.
In urban tunnel engineering, a shield method is usually adopted for construction, the outer diameter of a tunnel is 12.9m, the inner diameter is 11.7m, the thickness of a duct piece is 600mm, the ring width is 2.0m, the maximum water depth reaches 80m, and as the design waterproof requirement is high in level, if a bolt hole generates a water leakage phenomenon in the later stage, great threats are easily caused to tunnel operation and structure. Consequently, annular gasket 14 sets up annular arch 19 with one side of bolt anchoring end section of jurisdiction structure 1 contact, 14 external diameter 72mm of annular gasket, internal diameter 36mm, wide 18mm, thick 4.5mm, the protruding 19 height 3mm of annular, wide 5mm, bolt anchoring end section of jurisdiction structure 1 and bolt non-anchoring end section of jurisdiction structure 2 when assembling, the mutual pressure acting force through producing between the section of jurisdiction firmly fixes, plays initiative waterproof role. Meanwhile, after external high-pressure water enters the bolt holes, water flow reacts with the water-swelling type material layer 18 through the permeation holes 16 of the high-resilience rubber material layer 17 to generate outward swelling force, the contact extrusion acting force between the sealing element 4 and the segment structure and between the sealing element and the step anchor bolt 6 is further increased, and the passive waterproof effect is achieved.
Example 2: as shown in fig. 1 to 10, in order to further improve the waterproof sealing performance of the joints of the segments of the shield tunnel, on the basis of the composite sealing structure of the high water pressure resistant shield segment bolt holes described in embodiment 1, the following improvements are continuously made:
as shown in fig. 3, since the local corner of the T-shaped groove 3 is usually the weakest point of stress, a 45 ° inclined surface 5 connected with the through groove 8 is arranged at one end of the T-shaped groove 3, a tapered groove 21 matched with the annular gasket 14 is arranged at the other end, and the slope of the inclined surface of the tapered groove 21 is set to be 45 °; the bearing capacity of the structure can be effectively increased by the arrangement.
In this embodiment 2, as shown in fig. 1, 2, 3, 4, and 5, the cylindrical compaction section 15 is glued in the T-shaped groove 3, and when the step anchor bolt 6 connects the two shield segment structures, the small-head anchor section 9 is connected to the anchor end groove 7 in a matching manner, and the small-head free section 10 and the cylindrical compaction section 15 generate a contact extrusion force to generate a contact extrusion force mutually, thereby playing an active waterproof role.
Example 3: as shown in fig. 1 to 10, a high water pressure resistant composite sealing structure for shield segment bolt holes differs from the embodiments 1 and 2 in that the fastener is composed of a bolt gasket 12, a nut 13 and a high resilience rubber ring 20, and the high resilience rubber ring 20 is arranged at the end of the through groove 8 of the bolt non-anchoring end segment structure 2.
As shown in fig. 8, 9 and 10, in the present embodiment 3, the high resilience rubber ring 20 has an outer diameter of 52mm, an inner diameter of 40mm, a thickness of 6mm, and a circular truncated cone shape; the through groove 8 one end be equipped with the circular platform form high resilience rubber circle 20 assorted tapered slot, high resilience rubber circle 20 and bolt non-anchor end section of jurisdiction structure 2 when fixed, play the waterproof effect of initiative through mutual extrusion effort. The high-resilience rubber ring 20 is shown in fig. 9 in a sectional view and fig. 10 in a plan view.
In addition, it should be noted that the specific embodiments described in the present specification may differ in the shape of the components, the names of the components, and the like. All equivalent or simple changes in the structure, characteristics and principles of the patent idea are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.
Claims (7)
1. A high water pressure resistant shield segment bolt hole combined type sealing structure is characterized by comprising a sealing element (4), a step anchoring bolt (6), a bolt anchoring end segment structure (1) and a bolt non-anchoring end segment structure (2); wherein:
the sealing element (4) comprises a cylindrical compaction section (15), and an annular gasket (14) is arranged at the bottom of the cylindrical compaction section (15);
the step anchoring bolt (6) consists of a small-head anchoring section (9), a small-head free section (10), a large-head free section (11) and a fastener which are connected in sequence;
an anchoring end groove (7) matched with the small-head anchoring section (9) is arranged in the bolt anchoring end pipe piece structure (1);
a T-shaped groove (3) matched with the sealing element (4) and a through groove (8) matched with the large-head free section (11) are formed in the bolt non-anchoring end pipe piece structure (2);
sealing element (4) set up in T type recess (3), step anchor bolt (6) are pegged graft in proper order and are set up in logical groove (8), the close section of cylindricality compaction (15) and anchor end recess (7), will bolt anchor end section of jurisdiction structure (1) is fixed with bolt non-anchor end section of jurisdiction structure (2) concatenation.
2. The high water pressure resistant shield segment bolt hole composite sealing structure according to claim 1, wherein the cylindrical compacted section (15) comprises a water-swellable material layer (18), the outer layer of the water-swellable material layer (18) is coated with a high-resilience rubber material layer (17), and the inner wall of the high-resilience rubber material layer (17) is uniformly provided with penetration holes (16).
3. The high water pressure resistant shield segment bolt hole composite sealing structure as claimed in claim 2, characterized in that the side of the annular gasket (14) contacting the bolt anchoring end segment structure (1) is provided with an annular protrusion (19).
4. The high water pressure resistant shield segment bolt hole composite sealing structure according to claim 1, wherein the fastener is composed of a bolt gasket (12), a nut (13) and a high resilience rubber ring (20), and the high resilience rubber ring (20) is arranged at the end part of the through groove (8) of the bolt non-anchoring end segment structure (2).
5. The high water pressure resistant shield segment bolt hole composite sealing structure according to claim 4, wherein the high resilience rubber ring (20) is in a circular truncated cone shape, and one end of the through groove (8) is provided with a tapered groove matched with the circular truncated cone-shaped high resilience rubber ring (20).
6. The high water pressure resistant shield segment bolt hole composite sealing structure as claimed in claim 1, wherein one end of the T-shaped groove (3) is provided with an inclined plane (5) connected with the through groove (8), and the other end is provided with a tapered groove (21) matched with the annular gasket (14).
7. The high water pressure resistant shield segment bolt hole composite sealing structure as recited in claim 1, characterized in that the cylindrical compacting section (15) is adhesively connected with the T-shaped groove (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110640726.1A CN113294172A (en) | 2021-06-08 | 2021-06-08 | High-water-pressure-resistant shield segment bolt hole combined type sealing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110640726.1A CN113294172A (en) | 2021-06-08 | 2021-06-08 | High-water-pressure-resistant shield segment bolt hole combined type sealing structure |
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| CN113294172A true CN113294172A (en) | 2021-08-24 |
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| CN202110640726.1A Pending CN113294172A (en) | 2021-06-08 | 2021-06-08 | High-water-pressure-resistant shield segment bolt hole combined type sealing structure |
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| CN (1) | CN113294172A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114320381A (en) * | 2021-12-08 | 2022-04-12 | 北京中煤矿山工程有限公司 | Water stopping device for preventing through holes from leaking water and processing method thereof |
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|---|---|---|---|---|
| DE4406298A1 (en) * | 1994-02-26 | 1995-08-31 | Phoenix Ag | Sealing system for tunnel construction |
| JP2004137874A (en) * | 2002-08-19 | 2004-05-13 | Sekisui Chem Co Ltd | Caulking material for shield segment |
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| CN106050275A (en) * | 2016-07-13 | 2016-10-26 | 同济大学 | Sealing waterproof device for bolt hole of shield tunnel duct pieces |
| CN106593488A (en) * | 2016-11-23 | 2017-04-26 | 同济大学 | Waterproof structure for sealing high-water-pressure shield tunnel bolt hole |
| CN110185468A (en) * | 2019-07-05 | 2019-08-30 | 东北大学 | A kind of duct pieces of shield tunnel contact surface bolt hole package water-tight device |
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| CN112761683A (en) * | 2021-02-04 | 2021-05-07 | 西南交通大学 | Inclined bolt hole waterproof structure of high-water-head shield tunnel segment |
-
2021
- 2021-06-08 CN CN202110640726.1A patent/CN113294172A/en active Pending
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|---|---|---|---|---|
| DE4406298A1 (en) * | 1994-02-26 | 1995-08-31 | Phoenix Ag | Sealing system for tunnel construction |
| JP2004137874A (en) * | 2002-08-19 | 2004-05-13 | Sekisui Chem Co Ltd | Caulking material for shield segment |
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| CN110185468A (en) * | 2019-07-05 | 2019-08-30 | 东北大学 | A kind of duct pieces of shield tunnel contact surface bolt hole package water-tight device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114320381A (en) * | 2021-12-08 | 2022-04-12 | 北京中煤矿山工程有限公司 | Water stopping device for preventing through holes from leaking water and processing method thereof |
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Application publication date: 20210824 |