CN115949438B - Super-high water pressure shield segment joint structure and waterproof method - Google Patents
Super-high water pressure shield segment joint structure and waterproof method Download PDFInfo
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- CN115949438B CN115949438B CN202310243751.5A CN202310243751A CN115949438B CN 115949438 B CN115949438 B CN 115949438B CN 202310243751 A CN202310243751 A CN 202310243751A CN 115949438 B CN115949438 B CN 115949438B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 237
- 238000000034 method Methods 0.000 title claims abstract description 18
- 229920001971 elastomer Polymers 0.000 claims abstract description 118
- 239000000853 adhesive Substances 0.000 claims abstract description 21
- 230000001070 adhesive effect Effects 0.000 claims abstract description 21
- 230000006835 compression Effects 0.000 claims abstract description 20
- 238000007906 compression Methods 0.000 claims abstract description 20
- 238000002360 preparation method Methods 0.000 claims description 14
- 230000001680 brushing effect Effects 0.000 claims description 6
- 238000004078 waterproofing Methods 0.000 claims description 6
- 238000004026 adhesive bonding Methods 0.000 claims description 5
- 239000002002 slurry Substances 0.000 claims description 5
- 230000001133 acceleration Effects 0.000 claims description 3
- 238000009933 burial Methods 0.000 claims description 3
- 230000000052 comparative effect Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 12
- 239000000463 material Substances 0.000 description 4
- 229920002943 EPDM rubber Polymers 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000011150 reinforced concrete Substances 0.000 description 2
- 230000008961 swelling Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000003044 adaptive effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
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- 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
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- 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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention provides an ultra-high water pressure shield segment joint structure, which comprises segments and the like, wherein a wedge-shaped rubber water stop is positioned in a chute of the segment, a groove is arranged at the bottom of the chute, a pressurizing reserved pipe is communicated with the groove, a pressurizing auxiliary water stop rubber belt and a pressurizing pipe are positioned in the groove and the pressurizing reserved pipe, the wedge-shaped rubber water stop is in adhesive connection with the bottom of the chute, adjacent wedge-shaped rubber water stops are in adhesive connection, and the compression stress P of the wedge-shaped rubber water stop is caused by the waterproof method of the ultra-high water pressure shield segment joint structure 1 Bonding stress P of contact surface 2 Additional horizontal compressive stress P generated by external water pressure 3 Additional compressive stress P generated by pressurizing auxiliary water stop rubber belt 4 And not less than the water pressure. The invention has multiple waterproof modes, can adapt to ultra-high water pressure above 150m water depth, has easy realization of waterproof structure and low cost, can be effectively matched with shield equipment construction, and does not interfere with the construction.
Description
Technical Field
The invention belongs to the technical field of shield segment waterproofing, and particularly relates to an ultra-high water pressure shield segment joint structure and a waterproofing method.
Background
The scale and construction speed of tunnels in China are the most of the world, and most tunnels are constructed by a shield method with high mechanization degree, good operation environment and safe and efficient construction. Under the influence of groundwater, tunnel waterproof capability is a key factor of success of construction, and tunnel schemes are faced with extremely high water pressure exceeding 150mPa in future construction of strait channels in China. The shield tunnel main body is formed by splicing a plurality of duct pieces, the duct piece joints are numerous, and the waterproofing is the important part of the whole tunnel construction link. The shield tunnel segment joint is waterproof mainly in modes of a water-swelling water stop strip, an ethylene propylene diene monomer rubber water stop strip and the like, the water-swelling water stop strip generates compression force water stop after swelling in water by swelling materials, and the durability and the adaptive water pressure are limited, so that the shield tunnel segment joint is used less and less in China. The existing ethylene propylene diene monomer water-stopping technology is characterized in that rubber is compressed only when the pipe piece is assembled, so that the compressive stress of a rubber contact surface at a joint is larger than the external water pressure to stop water, but the existing ethylene propylene diene monomer water-stopping technology is limited by the structure and the external compressive force, so that the water-stopping capability is limited.
The disclosed improved technology also has great limitations: for example, chinese patent publication No. CN202690083U discloses a waterproof structure of shield tunnel duct piece, which has the problems that when ultrahigh water pressure is applied, the duct piece cannot be tightly attached, so that gaps are easy to appear between the waterproof structure and the duct piece assembly, the waterproof effect is poor, and the structure is difficult to firmly fix. Another example is that chinese patent of the grant publication number CN215332912U discloses a waterproof structure for ultra-high water pressure shield tunnel segment, which has the problems of complex structure, difficult site implementation caused by not considering how to cooperatively install with the shield machine.
In view of the above, aiming at the defects and adaptation limitations of the prior art, the waterproof seam structure and the waterproof method of the ultra-high water pressure shield segment seam are provided.
Disclosure of Invention
Aiming at the technical problems in the prior art, the invention provides the ultra-high water pressure shield segment joint structure and the waterproof method, which have multiple waterproof modes, can adapt to ultra-high water pressure above 150m water depth, are easy to realize in structure, have strong waterproof capability and low cost, can be effectively matched with shield equipment construction, and do not interfere with the construction.
The technical scheme adopted by the invention is as follows: the utility model provides an ultra-high water pressure shield constructs section of jurisdiction seam structure, includes section of jurisdiction, wedge rubber waterstop, pressurization auxiliary water-stop rubber tape and pressurization pipe, be provided with the chute on the terminal surface of the seam waterproof node of section of jurisdiction, wedge rubber waterstop is located in the chute, the chute bottom is provided with the recess, be provided with the pressurization reserve pipe in the section of jurisdiction, the pressurization reserve pipe with the recess intercommunication, the pressurization auxiliary water-stop rubber tape is located in the recess, with the pressurization pipe of the vacuum chamber intercommunication of the auxiliary water-stop rubber tape of pressurization is located in the pressurization reserve pipe, wedge rubber waterstop and chute bottom bonding connection, adjacent wedge rubber waterstop bonding connection on the section of jurisdiction forms the compressive stress of wedge rubber waterstop, the adhesive force of the seam of wedge rubber waterstop, outside water pressure are for the additional horizontal compressive stress that wedge rubber waterstop structure extrusion produced as main, the additional compressive stress that the auxiliary water-stop rubber tape of pressurization that the shield produced is auxiliary water-stop rubber tape of reservation.
Further, the included angle between the bottom surface of the duct piece joint waterproof node chute and the vertical direction is 10-15 degrees.
Further, an auxiliary compression hole is formed in the wedge-shaped rubber water stop.
Further, the side surface of the wedge-shaped rubber water stop belt, which is far away from the pressurizing auxiliary water stop rubber belt, is a vertical surface.
Further, the wedge-shaped rubber water stop is connected with the bottom of the chute through adhesive bonding, and the wedge-shaped rubber water stops on adjacent duct pieces are connected through adhesive bonding.
The technical scheme adopted by the invention is as follows: a waterproof method using the ultra-high water pressure shield segment joint structure comprises the following steps:
step 1: determining the design water pressure P of the tunnel in an ultra-high water pressure environment according to the shield tunnel burial depth and the upper water level Design water ；
According to physical and mechanical properties of the wedge-shaped rubber water stop, the compression stress P of the wedge-shaped rubber water stop after the segment assembly is estimated 1 ；
According to the design water pressure P Design water And the wedge-face inclination angle alpha of the wedge-shaped rubber water stop, and predicting the additional level of the wedge-shaped rubber water stop generated by water pressureCompressive stress P 3 ，P 3 =P Design water The angle of inclination of the wedge-shaped surface is the angle between the wedge-shaped surface and the vertical direction;
comparative P 1 + P 3 And P Design water Is of the size of (2): if P 1 + P 3 ≥P Design water The adhesive provides adhesive stress P 2 Taking 1.2MPa; if P 1 + P 3 ＜P Design water P is then 2 = P Design water -（P 1 + P 3 ) And P is 2 ＞1.2MPa；
Step 2: according to the parameter compressive stress P 1 Bonding stress P 2 And an additional horizontal compressive stress P 3 Selecting a proper wedge-shaped rubber water stop and a proper adhesive; manufacturing a segment made of reinforced concrete material;
step 3: brushing an adhesive in a chute at a water stop joint of the duct piece, pasting a wedge-shaped rubber water stop belt and a pressurizing auxiliary water stop rubber belt, brushing the adhesive on the outer side of the wedge-shaped rubber water stop belt, and assembling the duct piece;
step 4: after the pipe piece is assembled and the shield tail is removed, under the condition of ultra-high water pressure, if water leaks from the joint, inert slurry is filled into the pressurizing auxiliary water stop rubber belt through the pressurizing pipe, and the pressurizing auxiliary water stop rubber belt extrudes the wedge-shaped rubber water stop belt to generate additional pressurizing stress P 4 Until the seam is water-proof.
Further, in step 1, P Water supply device =2ρ Water and its preparation method gh，ρ Water and its preparation method The density of water, g is gravity acceleration; h is the distance between the lowest point of the tunnel bottom and the water surface, namely the water pressure generated by the water depth of the tunnel is not less than 2 times of the design water pressure.
Further, in step 4, compressive stress P is generated at the contact surface of the wedge-shaped rubber water stop between the two segments during segment assembly 1 And simultaneously generates bonding stress P 2 The method comprises the steps of carrying out a first treatment on the surface of the After the segment is separated from the shield tail, the segment is subjected to external water pressure P Water and its preparation method The wedge-shaped rubber water stop belt generates additional horizontal compressive stress P 3 。
Working principle: compression stress generated by compression of rubber water stop in construction process singly for waterproof of existing duct piece jointsForce P 1 Not less than external water pressure P Water and its preparation method The waterproof effect of the joint is achieved by the mode of (1), namely: p (P) 1 ≥P Water and its preparation method . Easy realization when the water pressure is not high (generally less than 100m water depth), and when the water pressure is ultrahigh, such as when the water pressure is 100m or higher, the engineering requirement cannot be met by the pressure waterproof mode generated by compression of the water stop belt.
The waterproof method of the invention comprises compressive stress P generated by the compression of the wedge-shaped rubber water stop 1 Bonding stress P of contact surface 2 Additional horizontal compressive stress P generated by external water pressure compressing wedge-shaped rubber water stop belt through wedge-shaped structure 3 And additional compressive stress P generated by the pressurizing auxiliary water stop rubber belt 4 Composition, i.e. P 1 + P 2 + P 3 + P 4 ≥P Water and its preparation method 。
Compared with the prior art, the invention has the following beneficial effects:
1. the invention designs a segment joint waterproof structure capable of providing compression self-locking and secondary pressurization of a water stop belt: the contact surface of the single pipe piece joint waterproof node concrete and the wedge-shaped rubber water stop is an inclined surface, and the joint waterproof node forms a wedge-shaped structure after pipe piece assembly. The inclined surface inclination satisfies the requirement that the wedge-shaped rubber water stop can be self-locked when the pipe piece is compressed, namely, the friction force is larger than the outward component force generated by pipe piece extrusion on the wedge-shaped rubber water stop, and the wedge-shaped rubber water stop does not slide towards the outer side of the pipe piece. The inclined plane of the waterproof joint of the duct piece joint is provided with a groove for secondary pressurization and water stop and a pressurization reserved pipe.
2. The invention designs a wedge-shaped rubber water stop belt structure capable of self-locking under external pressure: the cross section is a right trapezoid, and the cross section is a quadrilateral wedge-shaped structure with a wide upper part and a narrow lower part. The wedge-shaped rubber water stop is compressed and bonded between the water stops at the vertical sides of the wedge-shaped rubber water stop, and the inclination angle of the wedge-shaped surface is the same as that of the water stop joint of the pipe piece.
3. The invention designs a pressurizing auxiliary water stop rubber belt with a pressurizing auxiliary water stop function: the pressurizing auxiliary water stop rubber belt is internally provided with a cavity which can be filled with inert flowing materials, and the cavity structure is in a vacuum compression state initially. After the duct piece is closed, if water seepage or water leakage occurs, inert slurry can be filled into the cavity in a pressurizing mode, the wedge-shaped rubber water stop belt system is extruded, and the closing pressure is increased to achieve an auxiliary water stop function.
4. The invention designs a multiple waterproof mode: the closing pressure at the water stop joint consists of four parts, namely compression stress generated by compression of the wedge-shaped rubber water stop, bonding stress of a contact surface, additional horizontal compression stress generated by compression of the wedge-shaped rubber water stop by external water pressure through a wedge-shaped structure and additional compression stress generated by the pressurizing auxiliary water stop rubber belt, and can realize that water seepage or water leakage at the joint can not occur under the condition of water pressure with water depth of more than 150 m. The invention is suitable for ultra-high water pressure, has the advantages of easy realization of structure, low cost, safety and reliability, can be effectively matched with the construction of shield equipment, and does not interfere with the construction.
Drawings
FIG. 1 is a schematic diagram of an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a segment splicing process according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a duct piece after splicing according to an embodiment of the present invention;
fig. 4 is a flow chart of an embodiment of the present invention.
In the figure: 1-segment, 2-wedge-shaped rubber water stop, 3-pressurization auxiliary water stop rubber, 4-pressurization pipe, 5-chute, 6-groove and 7-pressurization reserved pipe.
Detailed Description
The present invention will be described in detail below with reference to the drawings and the specific embodiments, so that those skilled in the art can better understand the technical solutions of the present invention.
The embodiment of the invention provides an ultra-high water pressure shield segment joint structure, which is shown in fig. 1 and comprises a segment 1, a wedge-shaped rubber water stop belt 2, a pressurizing auxiliary water stop rubber belt 3 and a pressurizing pipe 4. The end face of the joint waterproof node of the duct piece 1 is provided with a chute 5, and the wedge-shaped rubber water stop 2 is positioned in the chute 5. The wedge-shaped rubber water stop belt 2 is connected with the bottom of the chute 5 through adhesive. The included angle between the bottom surface of the chute 5 and the vertical direction is 10-15 degrees, and the inclination angle of the wedge-shaped surface of the wedge-shaped rubber water stop belt 2, which is bonded with the bottom surface of the chute 5, is also 10-15 degrees. The inclined angle can meet the self-locking requirement of the wedge-shaped rubber water stop 2 when the duct piece 1 is compressed, namely, the friction force is larger than the outward component force generated by the extrusion of the duct piece 1 on the wedge-shaped rubber water stop 2, and the wedge-shaped rubber water stop 2 does not slide towards the outer side of the duct piece 1.
The wedge-shaped rubber water stop 2 is internally provided with an auxiliary compression hole. The side surface of the wedge-shaped rubber water stop belt 2, which is far away from the pressurizing auxiliary water stop rubber belt 3, is a vertical surface. When the adjacent duct pieces 1 are spliced, an adhesive is required to be smeared on the side surfaces, so that the wedge-shaped rubber water stops 2 on the adjacent duct pieces 1 are connected through adhesive bonding, as shown in fig. 2. After the segments 1 are spliced, the wedge-shaped rubber water stop 2 is extruded, as shown in fig. 3.
The chute 5 bottom is provided with recess 6, be provided with the pressurization in the section of jurisdiction 1 and reserve pipe 7, the pressurization reserve pipe 7 with recess 6 intercommunication, the supplementary stagnant water rubber tape of pressurization 3 is located recess 6, with the pressurization pipe 4 of the vacuum chamber intercommunication of the supplementary stagnant water rubber tape of pressurization 3 is located in the pressurization reserve pipe 7. The pressurizing pipe 4 can be used for filling inert slurry into the vacuum cavity of the pressurizing auxiliary water stop rubber belt 3, so that the pressurizing auxiliary water stop rubber belt 3 extrudes the wedge-shaped rubber water stop belt 2, and the closing pressure is increased to achieve the auxiliary water stop function.
The embodiment of the invention also provides a waterproof method using the ultra-high water pressure shield segment joint structure, as shown in fig. 4, comprising the following steps:
step 1: determining the design water pressure P of the tunnel in an ultra-high water pressure environment according to the shield tunnel burial depth and the upper water level Design water ；P Design water =2ρ Water and its preparation method gh，ρ Water and its preparation method The density of water, g is gravity acceleration; h is the distance between the lowest point of the tunnel bottom and the water surface.
According to the physical and mechanical properties of the wedge-shaped rubber water stop 2, the compressive stress P of the wedge-shaped rubber water stop 2 after the pipe piece 1 is assembled is estimated 1 In general, P 1 Less than 1.0Mpa.
According to the design water pressure P Design water And the wedge-face inclination angle alpha of the wedge-shaped rubber water stop 2, and predicting the additional horizontal compressive stress P of the wedge-shaped rubber water stop 2 generated by water pressure 3 ，P 3 =P Design water The angle of the wedge-shaped surface is the angle between the wedge-shaped surface and the vertical direction, wherein the angle is 10-15 degrees.
Comparative P 1 + P 3 And P Design water Is of the size of (2): if P 1 + P 3 ≥P Design water The adhesive provides adhesive stress P 2 =1.2 MPa; if P 1 + P 3 ＜P Design water P is then 2 = P Design water -（P 1 + P 3 ) And P is 2 ＞1.2Mpa。
Step 2: according to the parameter compressive stress P 1 Bonding stress P 2 And an additional horizontal compressive stress P 3 A suitable wedge-shaped rubber water stop 2 and adhesive are selected. The model of the wedge-shaped rubber water stop 2 and the adhesive can be determined after the physical and mechanical property requirements are provided for manufacturers.
And manufacturing the segment 1 of reinforced concrete material which meets the requirements of the wedge-shaped water stop joint and the pressurizing reserved pipe 7.
Step 3: and (3) brushing an adhesive in a chute 5 at the water stop joint of the duct piece 1, pasting a wedge-shaped rubber water stop belt 2 and a pressurizing auxiliary water stop rubber belt 3, brushing the adhesive outside the wedge-shaped rubber water stop belt 2, and assembling the duct piece.
Step 4: and the segment 1 is assembled and removed from the tail of the shield. When the duct pieces 1 are assembled, compressive stress P is generated on the contact surface of the wedge-shaped rubber water stop belt 2 between the two duct pieces 1 1 And simultaneously generates bonding stress P 2 The method comprises the steps of carrying out a first treatment on the surface of the After the segment 1 is separated from the tail of the shield, the segment is subjected to external water pressure P Water and its preparation method The wedge-shaped rubber water stop belt 2 generates additional horizontal compressive stress P 3 . Under ultra-high water pressure, if the seam is water-proof, P is described as 1 + P 2 + P 3 ≥P Water and its preparation method . At this time, the pressurization is not required to be assisted by the pressurization-assisted water stop rubber tape 3. If the joint leaks water, the pressurization auxiliary water stop rubber belt 3 is filled with inert slurry through the pressurization pipe 4, and the pressurization auxiliary water stop rubber belt 3 extrudes the wedge-shaped rubber water stop belt 2 to generate additional pressurization stress P 4 Until the joint is water-free, at which point P 1 + P 2 + P 3 + P 4 ≥P Water and its preparation method 。
The closing pressure at the water stop node of the present embodiment is compression stress P generated by the wedge-shaped rubber water stop 2 compression 1 Bonding stress P of contact surface 2 Additional horizontal compressive stress P generated by external water pressure compressing wedge-shaped rubber water stop 2 through wedge-shaped structure 3 And the additional compressive stress P generated by the pressurization auxiliary water stop rubber belt 3 4 The composition can realize that water seepage or water leakage does not occur at the joint under the condition of water pressure of more than 150 mPa.
The present invention has been described in detail by way of examples, but the description is merely exemplary of the invention and should not be construed as limiting the scope of the invention. The scope of the invention is defined by the claims. In the technical scheme of the invention, or under the inspired by the technical scheme of the invention, similar technical schemes are designed to achieve the technical effects, or equivalent changes and improvements to the application scope are still included in the protection scope of the patent coverage of the invention.
Claims (8)
1. The utility model provides an ultra-high water pressure shield constructs section of jurisdiction seam structure which characterized in that: including section of jurisdiction, wedge rubber waterstop, the supplementary stagnant water rubber tape of pressurization and pressurization pipe, be provided with the chute on the terminal surface of the waterproof node of seam of section of jurisdiction, wedge rubber waterstop is located in the chute, the chute bottom is provided with the recess, be provided with the pressurization in the section of jurisdiction and reserve the pipe, the pressurization reserve the pipe with the recess intercommunication, the supplementary stagnant water rubber tape of pressurization is located in the recess, with the pressurization pipe of the vacuum chamber intercommunication of the supplementary stagnant water rubber tape of pressurization is located in the pressurization reserve the pipe, wedge rubber waterstop and chute bottom bonding connection, adjacent wedge rubber waterstop bonding connection on the section of jurisdiction.
2. The ultra-high water pressure shield segment joint structure according to claim 1, wherein: the included angle between the bottom surface of the duct piece joint waterproof node chute and the vertical direction is 10-15 degrees.
3. The ultra-high water pressure shield segment joint structure according to claim 1, wherein: an auxiliary compression hole is formed in the wedge-shaped rubber water stop.
4. The ultra-high water pressure shield segment joint structure according to claim 1, wherein: the side surface of the wedge-shaped rubber water stop belt, which is far away from the pressurizing auxiliary water stop rubber belt, is a vertical surface.
5. The ultra-high water pressure shield segment joint structure according to claim 1, wherein: the wedge-shaped rubber water stops are connected with the bottoms of the inclined grooves through adhesive bonding, and the adjacent wedge-shaped rubber water stops on the duct pieces are connected through adhesive bonding.
6. A waterproofing method using the ultra-high water pressure shield segment joint structure according to any one of claims 1 to 5, comprising the steps of:
step 1: determining the design water pressure P of the tunnel in an ultra-high water pressure environment according to the shield tunnel burial depth and the upper water level Design water ；
According to physical and mechanical properties of the wedge-shaped rubber water stop, the compression stress P of the wedge-shaped rubber water stop after the segment assembly is estimated 1 ；
According to the design water pressure P Design water And the wedge-face inclination angle alpha of the wedge-shaped rubber water stop, and predicting the additional horizontal compressive stress P of the wedge-shaped rubber water stop generated by water pressure 3 ，P 3 =P Design water ×tanα；
Comparative P 1 + P 3 And P Design water Is of the size of (2): if P 1 + P 3 ≥P Design water The adhesive provides adhesive stress P 2 Taking 1.2MPa; if P 1 + P 3 ＜P Design water P is then 2 = P Design water -（P 1 + P 3 ) And P is 2 ＞1.2MPa；
Step 2: according to the parameter compressive stress P 1 BondingStress P 2 And an additional horizontal compressive stress P 3 Selecting a proper wedge-shaped rubber water stop and a proper adhesive;
step 3: brushing an adhesive in a chute at a water stop joint of the duct piece, pasting a wedge-shaped rubber water stop belt and a pressurizing auxiliary water stop rubber belt, brushing the adhesive on the outer side of the wedge-shaped rubber water stop belt, and assembling the duct piece;
step 4: after the duct piece is assembled and the shield tail is removed, if water leaks from the joint, inert slurry is filled into the pressurizing auxiliary water stop rubber belt through the pressurizing pipe, and the pressurizing auxiliary water stop rubber belt extrudes the wedge-shaped rubber water stop belt to generate additional pressurizing stress P 4 Until the seam is water-proof.
7. The waterproofing method according to claim 6, wherein: in step 1, P Design water =2ρ Water and its preparation method gh，ρ Water and its preparation method The density of water, g is gravity acceleration; h is the distance between the lowest point of the tunnel bottom and the water surface.
8. The waterproofing method according to claim 6, wherein: in step 4, compressive stress P is generated at the contact surface of the wedge-shaped rubber water stop between two segments during segment assembly 1 And simultaneously generates bonding stress P 2 The method comprises the steps of carrying out a first treatment on the surface of the After the segment is separated from the shield tail, the segment is subjected to external water pressure P Water and its preparation method The wedge-shaped rubber water stop belt generates additional horizontal compressive stress P 3 。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310243751.5A CN115949438B (en) | 2023-03-15 | 2023-03-15 | Super-high water pressure shield segment joint structure and waterproof method |
| NL2036387A NL2036387B1 (en) | 2023-03-15 | 2023-11-30 | A super high water pressure shield segment joint structure and waterproof method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202310243751.5A CN115949438B (en) | 2023-03-15 | 2023-03-15 | Super-high water pressure shield segment joint structure and waterproof method |
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| CN115949438A CN115949438A (en) | 2023-04-11 |
| CN115949438B true CN115949438B (en) | 2023-05-05 |
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| CN215332912U (en) | 2021-08-23 | 2021-12-28 | 中铁十八局集团有限公司 | Waterproof structure for ultrahigh water pressure shield tunnel segment |
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| CN211666741U (en) * | 2020-01-20 | 2020-10-13 | 杭州临安中民筑友智造科技有限公司 | Section of jurisdiction waterproof construction to tube slot is opened |
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| Publication number | Publication date |
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| NL2036387B1 (en) | 2024-07-05 |
| CN115949438A (en) | 2023-04-11 |
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