CN118110537A - Prefabricated lining segment and shield tunnel partition waterproof structure - Google Patents

Prefabricated lining segment and shield tunnel partition waterproof structure Download PDF

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Publication number
CN118110537A
CN118110537A CN202410298147.7A CN202410298147A CN118110537A CN 118110537 A CN118110537 A CN 118110537A CN 202410298147 A CN202410298147 A CN 202410298147A CN 118110537 A CN118110537 A CN 118110537A
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CN
China
Prior art keywords
waterproof
longitudinal
seam
radial sealing
radial
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202410298147.7A
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Chinese (zh)
Inventor
肖明清
薛光桥
彭长胜
罗驰恒
吴鑫林
石来
曹翔鹏
秦睿成
谭子安
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China Railway Siyuan Survey and Design Group Co Ltd
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China Railway Siyuan Survey and Design Group Co Ltd
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Publication date
Application filed by China Railway Siyuan Survey and Design Group Co Ltd filed Critical China Railway Siyuan Survey and Design Group Co Ltd
Priority to CN202410298147.7A priority Critical patent/CN118110537A/en
Publication of CN118110537A publication Critical patent/CN118110537A/en
Pending legal-status Critical Current

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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
    • E21D11/381—Setting apparatus or devices
    • 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
    • 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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  • 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 the technical field of tunnel engineering, in particular to a prefabricated lining segment and shield tunnel partition waterproof structure, which comprises a segment body, wherein the segment body is provided with two circular seam surfaces and two longitudinal seam surfaces, at least two waterproof sealing gaskets are arranged on the circular seam surfaces and the longitudinal seam surfaces, at least one circular seam surface and/or at least one longitudinal seam surface is provided with a radial sealing gasket, and the radial sealing gasket is positioned between two adjacent waterproof sealing gaskets on the surface. According to the invention, at least one radial sealing gasket is arranged between two adjacent waterproof sealing gaskets, and the seepage path is cut off at the circumferential seam and/or the longitudinal seam, so that the outside initial seepage position and the inside actual seepage position are ensured to be in a controllable small-range area, the waterproof partition of the shield tunnel is realized, the diffusion range of local seepage points is controlled, the probability of simultaneous failure of double sealing is reduced, the reliability of a full-line waterproof system of the shield tunnel is improved, the seepage points are accurately positioned in time after the pipe piece is leaked, the repair difficulty is reduced, and the repair efficiency is improved.

Description

Prefabricated lining segment and shield tunnel partition waterproof structure
Technical Field
The invention relates to the technical field of tunnel engineering, in particular to a prefabricated lining segment and a shield tunnel partition waterproof structure.
Background
The waterproof of the shield tunnel is related to the normal exertion of the use function of the tunnel and the service life of the tunnel. In the waterproof of the shield tunnel, the joint waterproof is the weakest and also the most important, so the key point of the waterproof of the shield tunnel is the joint waterproof between the pipe pieces and between the rings. At present, most shield tunnels with low water pressure still take a single-channel ethylene propylene diene monomer rubber sealing gasket as a main stream, and in recent years, along with the continuous increase of water pressure, a second-generation joint waterproof system formed by the single-channel ethylene propylene diene monomer rubber and water-swelling rubber and a third-generation joint waterproof system taking an inner-side and outer-side double-channel ethylene propylene diene monomer rubber sealing gasket as a main body are sequentially generated and are applied to a plurality of high water pressure shield tunnel projects.
The third-generation joint waterproof system with the inner and outer dual-channel ethylene propylene diene monomer gaskets as the main body has the waterproof performance improved compared with the first-generation and second-generation waterproof systems, but only the waterproof problem is considered as the two-dimensional strain problem at the beginning of the joint waterproof design, and the cavity between the dual-channel gaskets at the joint position of the duct piece is in a full tunnel communication state. When the outside sealing gasket is leaked due to water seepage defect, water flows to the joint of the full tunnel through the cavity between the two sealing gaskets. If the sealing gasket at the inner side of the tunnel is defective, water leakage can occur at the position, so that the segment joint waterproof system is invalid, and the probability of water leakage disease of the tunnel is increased. Moreover, the position relation between the initial outside leakage point and the final inside leakage point is completely random, so that the position of the outside sealing gasket leakage point is difficult to accurately position through the inside leakage point, the tunnel leakage is difficult to repair, and the leakage problem is difficult to eradicate. Meanwhile, the waterproof capacity of the outer channel sealing gasket is generally larger than that of the inner channel sealing gasket, once the outer channel sealing gasket is broken through by water flow, if the outer channel sealing gasket is not repaired in time, the inner channel sealing gasket is exposed in a high water pressure environment for a long time, the whole waterproof system of the double channel sealing gasket is invalid and is difficult to remedy, so that water and soil loss at the outer side of a segment is caused, and the safety problem of a shield tunnel structure is further deteriorated.
Disclosure of Invention
The invention aims to provide a prefabricated lining segment and shield tunnel partition waterproof structure, which can prevent leakage water from flowing in a waterproof gasket cavity of a whole tunnel through the partition waterproof structure after leakage occurs in an outer channel waterproof gasket, so that the accurate identification of the outer initial leakage position and the inner actual leakage position range is realized, the repair difficulty is reduced, and the repair blanking is improved.
In order to achieve the above purpose, the technical scheme of the invention is that the prefabricated lining segment comprises a segment body, wherein the segment body is provided with two circular seam surfaces and two longitudinal seam surfaces, the circular seam surfaces and the longitudinal seam surfaces are provided with at least two waterproof sealing gaskets, at least one circular seam surface and/or at least one longitudinal seam surface is provided with a radial sealing gasket, and the radial sealing gasket is positioned between two adjacent waterproof sealing gaskets on the surface.
As one embodiment, two ends of the radial sealing gasket are sealed with two waterproof sealing gaskets at two sides of the radial sealing gasket.
As one of implementation modes, waterproof grooves are formed in the prefabricated lining segments at positions corresponding to the waterproof sealing gaskets, and the waterproof sealing gaskets are embedded in the corresponding waterproof grooves by adopting cementing agents.
As one of implementation modes, the circular seam face and the longitudinal seam face are both provided with bolt pore canals, and the waterproof sealing gasket and the radial sealing gasket are both positioned outside the bolt pore canals of the faces.
As one of implementation modes, the circular seam surface and the longitudinal seam surface are both provided with two waterproof sealing gaskets, a first waterproof sealing gasket is arranged close to the upstream surface side, and a second waterproof sealing gasket is arranged close to the first waterproof sealing gasket.
The invention also provides a shield tunnel partition waterproof structure, which comprises multiple ring lining rings spliced in sequence along the longitudinal direction, wherein each ring lining ring is formed by splicing lining segments, and each lining segment comprises a standard block, an adjacent block and a capping block; the standard block, the adjacent block and the capping block adopt the structural form of the prefabricated lining segment, waterproof gaskets on the adjacent lining segments are mutually extruded and sealed in corresponding longitudinal seams or circumferential seams, and radial gaskets on the adjacent lining segments are mutually extruded and sealed in corresponding longitudinal seams or circumferential seams.
As one embodiment, the longitudinal seam surfaces of the standard block, the adjacent block and the capping block are respectively provided with at least one radial sealing gasket, and at least one pair of radial sealing gaskets are mutually extruded and sealed in each longitudinal seam of the lining ring.
As one of implementation modes, the annular seam surfaces of the standard block, the adjacent block and the capping block are respectively provided with at least one radial sealing gasket, and at least one pair of radial sealing gaskets are mutually extruded and sealed between two adjacent longitudinal seams of the front annular lining ring and the rear annular lining ring.
As one of implementation modes, the radial sealing gaskets are arranged on the longitudinal joint surfaces and the annular joint surfaces of the standard block, the adjacent block and the capping block, at least one pair of radial sealing gaskets in each longitudinal joint of the lining ring are mutually extruded and sealed, and at least one pair of radial sealing gaskets in the annular joint between two adjacent longitudinal joints of the lining ring are mutually extruded and sealed.
As one embodiment, the radial gasket on the longitudinal joint surface of the capping block and the radial gasket on the longitudinal joint surface of the abutting block for splicing with the capping block are both radial gaskets with trapezoid cross sections.
Compared with the prior art, the invention has the following beneficial effects:
According to the invention, the radial sealing gasket is arranged between the two waterproof sealing gaskets of at least one circular seam surface and/or at least one longitudinal seam surface of the lining segment, and the seepage path is cut off at the circular seam and/or the longitudinal seam, so that the outside initial seepage position and the inside actual seepage position are ensured to be in a controllable small-range area, the waterproof partition of the shield tunnel is realized, the diffusion range of local seepage points is controlled, the probability of simultaneous failure of two seals is reduced, the reliability of the full-line waterproof system of the shield tunnel is improved, the timely and accurate positioning of the seepage points after the segment is leaked is realized, the repair difficulty is reduced, and the repair efficiency is improved.
Drawings
In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the invention, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic structural view of a prefabricated lining segment according to an embodiment of the present invention;
FIG. 2 is a schematic view of radial sealing gaskets arranged on longitudinal joint surfaces and circumferential joint surfaces of prefabricated lining segments according to an embodiment of the invention;
FIG. 3 is a schematic view of a radial gasket with a trapezoid cross section for a longitudinal joint surface of a capping block according to an embodiment of the present invention.
Fig. 4 is a schematic view of a waterproof partition of a tunnel using a radial gasket arrangement with full longitudinal seam provided by an embodiment of the present invention.
Fig. 5 is a schematic view of a waterproof partition of a tunnel using a full circumferential seam arrangement radial gasket scheme provided by an embodiment of the present invention.
Fig. 6 is a schematic view of a waterproof partition of a tunnel using a longitudinal seam arrangement radial gasket+circumferential seam arrangement radial gasket scheme provided by an embodiment of the present invention.
In the figure: 1. a first waterproof gasket; 2. a second waterproof gasket; 3. longitudinal seam radial seal gasket; 4. a circular seam radial seal gasket; 5. radial gasket of trapezoid cross section; 6. a capping block; 7. a first neighbor block; 8. a second abutment; 9. a standard block; 10. a percolation path; 11. a longitudinal seam surface; 12. and (5) a circular seam surface.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate describing the present invention and simplify the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
The terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first", "a second" may include one or more such features, either explicitly or implicitly; in the description of the present invention, unless otherwise indicated, the meaning of "a plurality" is two or more.
Example 1
As shown in fig. 1-2, this embodiment provides a prefabricated lining segment, which includes a segment body, where the segment body has two circumferential seam surfaces 12 and two longitudinal seam surfaces 11, where the circumferential seam surfaces 12 and the longitudinal seam surfaces 11 are provided with at least two waterproof sealing gaskets, and at least one of the circumferential seam surfaces 12 and/or at least one of the longitudinal seam surfaces 11 is provided with a radial sealing gasket, and the radial sealing gasket is located between two adjacent waterproof sealing gaskets on the surface where the radial sealing gasket is located. According to the embodiment, the radial sealing gasket is arranged between the two adjacent waterproof sealing gaskets, so that the seepage path can be cut off at the circular seam and/or the longitudinal seam, the initial leakage position at the outer side and the actual leakage position at the inner side are ensured to be longitudinally in a controllable small-range area, and the repair is convenient to carry out in time.
Wherein, two annular seam surfaces 12 and two longitudinal seam surfaces 11 of the duct piece body are provided with at least two waterproof sealing gaskets; the radial gasket includes a circular seam radial gasket 4 provided on the circular seam face 12 and a longitudinal seam radial gasket 3 provided on the longitudinal seam face 11.
In one embodiment, both annular slit surfaces 12 of the segment body are provided with at least one annular slit radial seal 4. A shield tunnel spliced by the standard blocks 9, the adjacent blocks and the capping blocks 6 in the prefabricated lining segment structure is characterized in that a plurality of pairs of annular seam radial gaskets 4 are arranged in annular seams between adjacent lining rings to be mutually extruded and sealed, and seepage paths between the waterproof gaskets in the annular seams are cut off.
In another embodiment, both longitudinal joint surfaces 11 of the segment body are provided with at least one longitudinal joint radial seal 3. The shield tunnel spliced by the standard blocks 9, the adjacent blocks and the capping blocks 6 in the prefabricated lining segment structure is characterized in that at least one pair of longitudinal seam radial sealing gaskets 3 are arranged in each longitudinal seam of each ring lining ring to be mutually extruded and sealed, and seepage paths among the waterproof sealing gaskets in the longitudinal seams are cut off.
In the third embodiment, two annular seam surfaces 12 of the segment body are provided with at least one annular seam radial sealing gasket 4, and two longitudinal seam surfaces 11 are provided with at least one longitudinal seam radial sealing gasket 3. The shield tunnel spliced by the standard blocks 9, the adjacent blocks and the capping blocks 6 in the prefabricated lining segment structure is characterized in that at least one pair of longitudinal seam radial sealing gaskets 3 are arranged in each longitudinal seam of each ring lining ring to be mutually extruded and sealed, a plurality of pairs of ring seam radial sealing gaskets 4 are arranged in the ring seams between the adjacent lining rings to be mutually extruded and sealed, and seepage paths between the longitudinal seams and the waterproof sealing gaskets in the ring seams are cut off.
In this embodiment, two ends of the radial sealing pad are sealed with two waterproof sealing pads on two sides of the radial sealing pad. The radial sealing gaskets are arranged between two adjacent waterproof sealing gaskets along the radial direction (thickness direction) of the duct piece body, the radial sealing gaskets can be fixed on the duct piece body by adopting cementing agent, and the two ends of the radial sealing gaskets are sealed with the two waterproof sealing gaskets on the two sides of the radial sealing gaskets to form an 'I' -shaped partition waterproof structure so as to ensure that the seepage path between the waterproof sealing gaskets is sectioned.
Further, waterproof grooves are formed in the prefabricated lining pipe piece at positions corresponding to the waterproof sealing gaskets, and the waterproof sealing gaskets are embedded into the corresponding waterproof grooves by adopting cementing agents, so that the waterproof sealing gaskets are firmly and tightly connected with the pipe piece body. In the embodiment, the waterproof groove is reserved at the corresponding position when the prefabricated lining pipe piece is prefabricated in the factory, the waterproof sealing gasket is installed in the corresponding waterproof groove after the prefabricated lining pipe piece is prefabricated, and the radial sealing gasket is installed between the waterproof sealing gaskets, so that the waterproof sealing gasket, the radial sealing gasket and the pipe piece body are integrated, and then the pipe piece is transported to a construction site for standby.
Further, the circular seam face 12 and the longitudinal seam face 11 are both provided with bolt pore passages, and the waterproof sealing gasket and the radial sealing gasket are both positioned outside the bolt pore passages of the faces. The bolt pore canal of the circular seam face 12 is used for circumferential splicing of prefabricated lining segments, the bolt pore canal of the longitudinal seam face 11 is used for longitudinal splicing of prefabricated lining segments, and the waterproof sealing gasket and the radial sealing gasket are arranged on the water facing side of the bolt pore canal of the face, so that construction is convenient, deformation and leakage risks of the bolt pore canal in the stress process can be reduced, and durability and safety of a tunnel are improved.
In one embodiment, the circular seam face 12 and the longitudinal seam face 11 are both provided with two waterproof sealing gaskets, and the first waterproof sealing gasket 1 is arranged near the upstream face side, and the second waterproof sealing gasket 2 is arranged near the first waterproof sealing gasket 1. The radial gasket is arranged between the first waterproof gasket 1 and the second waterproof gasket 2.
In another embodiment, the annular seam surface 12 and the longitudinal seam surface 11 are respectively provided with more than two waterproof sealing gaskets, the first waterproof sealing gasket 1 is arranged close to the upstream surface, the second waterproof sealing gasket 2 and other waterproof sealing gaskets are sequentially arranged from the position close to the first waterproof sealing gasket 1 to the inner side, radial sealing gaskets can be arranged in the annular seam and the longitudinal seam between every two adjacent waterproof sealing gaskets, and radial sealing gaskets can also be arranged in the annular seam and the longitudinal seam between the two innermost waterproof sealing gaskets.
Example two
The embodiment provides a shield tunnel partition waterproof structure, which comprises multiple ring lining rings spliced in sequence along the longitudinal direction, wherein each ring lining ring is formed by splicing lining segments, and each lining segment comprises a standard block 9, an adjacent block and a capping block 6; the standard block 9, the adjacent block and the capping block 6 all adopt the structure form of the prefabricated lining segment in the first embodiment, and the waterproof gaskets on the adjacent lining segments are mutually pressed and sealed in the corresponding longitudinal seams or circumferential seams, and the radial gaskets on the adjacent lining segments are mutually pressed and sealed in the corresponding longitudinal seams or circumferential seams. According to the embodiment, the seepage path is cut off at the circumferential seam and/or the longitudinal seam, so that the outside initial seepage position and the inside actual seepage position are ensured to be in a controllable small-range area, the waterproof partition of the shield tunnel is realized, the diffusion range of local seepage points is controlled, the probability of simultaneous failure of double-channel sealing is reduced, the reliability of a full-line waterproof system of the shield tunnel is improved, the seepage points are accurately positioned in time after the pipe piece is leaked, the repair difficulty is reduced, and the repair efficiency is improved.
In this embodiment, the standard block 9, the adjacent block and the capping block 6 all adopt the structure form of the prefabricated lining segment in the first embodiment, that is, all the three are provided with at least two waterproof sealing gaskets on the circular seam face 12 and the longitudinal seam face 11, and at least one circular seam face 12 and/or at least one longitudinal seam face 11 is provided with a radial sealing gasket, and the three are only different in size and shape.
According to the requirement of the waterproof performance of the tunnel and the requirement of site construction, the embodiment determines that the shield tunnel partition waterproof structure can adopt the following three schemes: the radial sealing gasket is arranged by adopting a scheme of arranging radial sealing gaskets by adopting full longitudinal seams, a scheme of arranging radial sealing gaskets by adopting full circumferential seams, and a scheme of arranging radial sealing gaskets by adopting longitudinal seams and radial sealing gaskets by adopting circumferential seams.
By adopting the scheme of arranging radial sealing gaskets through all longitudinal joints, at least one longitudinal joint radial sealing gasket 3 is arranged on the longitudinal joint surfaces 11 of the standard block 9, the adjacent block and the capping block 6, and at least one pair of longitudinal joint radial sealing gaskets 3 in each longitudinal joint of the lining ring are mutually extruded and sealed. In one embodiment, as shown in fig. 4, the longitudinal seam surfaces 11 of the standard block 9, the adjacent block and the capping block 6 are provided with a longitudinal seam radial sealing gasket 3, and a pair of longitudinal seam radial sealing gaskets 3 are arranged in each longitudinal seam of the lining ring to be mutually pressed and sealed, so that the seepage path between two adjacent ring seams is blocked.
By adopting the scheme of arranging radial sealing gaskets through full annular seams, the annular seam surfaces 12 of the standard block 9, the adjacent block and the top sealing block 6 are respectively provided with at least one annular seam radial sealing gasket 4, and at least one pair of annular seam radial sealing gaskets 4 are mutually extruded and sealed between two adjacent longitudinal seams of the front annular lining ring and the rear annular lining ring. In one embodiment, as shown in fig. 5, the annular seam surface 12 of the capping block 6 is provided with one annular seam radial sealing gasket 4, the annular seam surfaces 12 of the standard block 9 and the adjacent block are provided with two or three annular seam radial sealing gaskets 4, and a pair of annular seam radial sealing gaskets 4 are mutually extruded and sealed in the annular seam between two adjacent longitudinal seams of the front annular lining ring and the rear annular lining ring, so that the seepage path between the two adjacent longitudinal seams is ensured to be blocked.
The scheme of arranging radial sealing gaskets through longitudinal seams and arranging radial sealing gaskets through circumferential seams is adopted, at least one longitudinal seam radial sealing gasket 3 is arranged on the longitudinal seam surfaces 11 of the standard block 9, the adjacent block and the capping block 6, and at least one circumferential seam radial sealing gasket 4 is arranged on the circumferential seam surface 12; at least one pair of longitudinal seam radial sealing gaskets 3 in each longitudinal seam of the lining ring are mutually extruded and sealed, and at least one pair of annular seam radial sealing gaskets 4 in the annular seam between two adjacent longitudinal seams of the lining ring are mutually extruded and sealed. In one embodiment, as shown in fig. 6, the longitudinal seam surfaces 11 of the standard block 9, the adjacent block and the capping block 6 are all provided with a longitudinal seam radial gasket 3, the circumferential seam surfaces 12 are all provided with a circumferential seam radial gasket 4, a pair of longitudinal seam radial gaskets 3 in each longitudinal seam of the lining ring are mutually extruded and sealed, and a pair of circumferential seam radial gaskets 4 in the circumferential seam between two adjacent longitudinal seams of each lining ring are mutually extruded and sealed, so that seepage paths between two adjacent longitudinal seams or circumferential seams are blocked, and the problem of channeling cannot occur.
In optimizing the above embodiment, the radial gasket on the longitudinal joint surface 11 of the capping block 6 and the radial gasket on the longitudinal joint surface 11 of the abutting block for splicing with the capping block 6 are both radial gaskets 5 with trapezoidal cross sections. Because the shape of the top sealing block 6 is wedge-shaped, the assembly process is different from that of the standard block 9 and the adjacent blocks, and the assembly process needs to be firstly overlapped for a certain length and then inserted between the adjacent blocks along the longitudinal direction under the action of the pushing force; and the sealing gasket of the sealing block 6 with the waterproof partition at the longitudinal joint is provided with a cross joint, and the cross joint is subjected to larger friction force when the sealing gasket of the longitudinal joint is pushed in to influence the final waterproof effect, so that the radial sealing gasket in the longitudinal joint between the sealing block 6 and the adjacent block adopts the radial sealing gasket 5 with a trapezoid cross section, as shown in fig. 3, so that the action of sliding friction force in the assembling process is reduced, the sealing gasket is ensured to be finally compressed to a preset form, and the normal waterproof capability of the sealing gasket is ensured. The detailed size of the cross section of the radial sealing gasket 5 with the trapezoid cross section is specially designed according to the joint groove structure, the duct piece assembling process, the duct piece assembling force and the sealing gasket structure. Because the circumferential seam is assembled and deformed only by extrusion, the action of sliding friction force of the cross joint in the assembling process is not required to be considered, and therefore, the radial sealing gasket of the circumferential seam surface 12 of the sealing block 6 can be in the same structural form as the radial sealing gasket except the longitudinal seam radial sealing gasket 3 extruded and sealed by the sealing block 6 on the adjacent block and the radial sealing gasket on the adjacent block. All radial gaskets can also adopt the same structural form.
When the lining segments of the embodiment are assembled on site, the standard blocks 9, the first adjacent blocks 7 and the second adjacent blocks 8 are assembled to corresponding positions through a segment assembler, and the assembly is completed after longitudinal joint is directly extruded; the top sealing block 6 is different from other blocks in assembly process, the top sealing block 6 is wedge-shaped, needs to be lapped for a certain length, and then is inserted between the first adjacent block 7 and the second adjacent block 8 along the longitudinal direction under the thrust action of a jack to form an integral lining ring; in the extrusion process, whether the radial sealing gasket on the sealing top block 6 reaches a preset position is observed, so that the radial sealing gasket crossing node is ensured to be stable under the sliding resistance and is compressed to a preset form. And repeating the above processes until the installation of the partition waterproof structure of the full shield tunnel is completed.
The foregoing description is only illustrative of the preferred embodiments of the present invention and is not intended to limit the invention to any particular number, size, shape, arrangement, materials, or connection, and therefore, all possible modifications and equivalents may be resorted to, falling within the scope of the invention.

Claims (10)

1. The utility model provides a prefabricated lining segment, includes the segment body, the segment body has two circumferential weld faces and two longitudinal joint faces, its characterized in that: the circular seam face and the longitudinal seam face are respectively provided with at least two waterproof sealing gaskets, at least one circular seam face and/or at least one longitudinal seam face is provided with a radial sealing gasket, and the radial sealing gasket is positioned between two adjacent waterproof sealing gaskets on the face where the radial sealing gasket is positioned.
2. The prefabricated lining segment of claim 1, wherein: and two ends of the radial sealing gasket are sealed with two waterproof sealing gaskets on two sides of the radial sealing gasket.
3. The prefabricated lining segment of claim 1, wherein: the position of the prefabricated lining segment corresponding to each waterproof sealing pad is provided with a waterproof groove, and the waterproof sealing pads are embedded in the corresponding waterproof grooves by adopting cementing agents.
4. The prefabricated lining segment of claim 1, wherein: the circular seam face and the longitudinal seam face are both provided with bolt pore canals, and the waterproof sealing gasket and the radial sealing gasket are both positioned on the outer sides of the bolt pore canals of the faces.
5. The prefabricated lining segment of claim 1, wherein: the circular seam face and the longitudinal seam face are respectively provided with two waterproof sealing gaskets, the first waterproof sealing gasket is arranged close to the upstream face side, and the second waterproof sealing gasket is arranged close to the first waterproof sealing gasket.
6. The shield tunnel zoned waterproof structure comprises multiple ring lining rings which are spliced in sequence along the longitudinal direction, wherein each ring lining ring is formed by splicing lining segments, and each lining segment comprises a standard block, an adjacent block and a capping block; the method is characterized in that: the standard block, the adjacent block and the top sealing block all adopt the structural form of the prefabricated lining segment according to any one of claims 1-5, waterproof sealing gaskets on the adjacent lining segments are mutually extruded and sealed in corresponding longitudinal seams or circular seams, and radial sealing gaskets on the adjacent lining segments are mutually extruded and sealed in corresponding longitudinal seams or circular seams.
7. The shield tunnel zoned waterproof structure according to claim 6, wherein: at least one radial sealing gasket is arranged on the longitudinal joint surfaces of the standard block, the adjacent block and the capping block, and at least one pair of radial sealing gaskets are arranged in each longitudinal joint of the lining ring to be mutually extruded and sealed.
8. The shield tunnel zoned waterproof structure according to claim 6, wherein: the annular seam surfaces of the standard block, the adjacent block and the capping block are respectively provided with at least one radial sealing gasket, and at least one pair of radial sealing gaskets are arranged between two adjacent longitudinal seams of the front annular lining ring and the rear annular lining ring for mutual extrusion sealing.
9. The shield tunnel zoned waterproof structure according to claim 6, wherein: the standard block, the adjacent block, the longitudinal seam surface and the circular seam surface of the capping block are respectively provided with the radial sealing gaskets, at least one pair of radial sealing gaskets in each longitudinal seam of the lining ring are mutually extruded and sealed, and at least one pair of radial sealing gaskets in the circular seam between two adjacent longitudinal seams of the lining ring are mutually extruded and sealed.
10. The shield tunnel zoned waterproof structure according to claim 6, wherein: the radial sealing gaskets on the longitudinal joint surfaces of the capping blocks and the radial sealing gaskets on the longitudinal joint surfaces of the adjacent blocks, which are used for being spliced with the capping blocks, are all radial sealing gaskets with trapezoid cross sections.
CN202410298147.7A 2024-03-15 2024-03-15 Prefabricated lining segment and shield tunnel partition waterproof structure Pending CN118110537A (en)

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CN202410298147.7A CN118110537A (en) 2024-03-15 2024-03-15 Prefabricated lining segment and shield tunnel partition waterproof structure

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