CN108560596B - Reversible immersed tube tunnel final joint and butt joint construction method thereof - Google Patents
Reversible immersed tube tunnel final joint and butt joint construction method thereof Download PDFInfo
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- CN108560596B CN108560596B CN201810687346.1A CN201810687346A CN108560596B CN 108560596 B CN108560596 B CN 108560596B CN 201810687346 A CN201810687346 A CN 201810687346A CN 108560596 B CN108560596 B CN 108560596B
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- 230000002441 reversible effect Effects 0.000 title claims abstract description 46
- 238000010276 construction Methods 0.000 title claims abstract description 43
- 210000001503 joint Anatomy 0.000 title claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims description 90
- 239000010959 steel Substances 0.000 claims description 90
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 78
- 238000007789 sealing Methods 0.000 claims description 13
- 230000000149 penetrating effect Effects 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 4
- 238000007599 discharging Methods 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/063—Tunnels submerged into, or built in, open water
- E02D29/073—Tunnels or shuttering therefor assembled from sections individually sunk onto, or laid on, the water-bed, e.g. in a preformed trench
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/10—Tunnels or galleries specially adapted to house conduits, e.g. oil pipe-lines, sewer pipes ; Making conduits in situ, e.g. of concrete ; Casings, i.e. manhole shafts, access or inspection chambers or coverings of boreholes or narrow wells
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
-
- 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)
- Mining & Mineral Resources (AREA)
- Civil Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Environmental & Geological Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides a final joint of a reversible immersed tube tunnel and a butt joint construction method thereof, belongs to the technical field of immersed tube tunnel construction, and has the advantages of flexible, simple and convenient reversible construction operation mode and small construction risk. The final joint comprises a connecting sleeve arranged at the end to be butted of the pipe section of the buried section, and a jacking pipe section for butting with the installed pipe section is sleeved in the connecting sleeve; the inner wall of the jacking pipe section is provided with a first counter-force bracket, and the inner wall of the buried section pipe section is provided with a second counter-force bracket opposite to the first counter-force bracket; a telescopic pushing piece is arranged between the first counter-force bracket and the second counter-force bracket, and can extend or retract along the axial direction so as to push out or pull back the jacking pipe joint relative to the connecting sleeve; and a thrust component used for preventing the jacking pipe joint from being pushed back after the jacking pipe joint is pushed out to be butted with the installed pipe section is detachably connected between the first counter-force bracket and the second counter-force bracket.
Description
Technical Field
The invention belongs to the technical field of immersed tube tunnel construction, and particularly relates to a final joint of a reversible immersed tube tunnel and a butt joint construction method thereof.
Background
In the pipe section installation of the immersed tunnel, a distance space longer than the pipe section is required to be reserved for the last pipe section to be smoothly immersed. When the last section is sunk, the end face of the last section and the buried section are connected through a connecting structure, and the connecting structure is the final joint.
With the development of immersed tube tunnel construction technology, the form of the final joint is more and more diversified, and the final joint with the jacking pipe joint is a novel final joint. For example: patent CN107938709a provides a final joint of immersed tube tunnel, which is a final joint with a jacking tube segment, although the jacking tube segment can be retracted into the connecting tube segment by using an external jack, so as to realize reversible construction. However, the connection of the peripheral jack is time-consuming and labor-consuming, which makes the reversible construction operation complex, and the peripheral jack works in a water environment and still has a certain construction risk.
Therefore, how to provide a reversible immersed tube tunnel final joint which is simple and convenient to operate and has smaller construction risk is a technical problem which needs to be solved currently.
Disclosure of Invention
Aiming at the defects that the operation is complex and a certain construction risk exists in the reversible construction of the final joint of the conventional reversible immersed tube tunnel, the invention provides the final joint of the reversible immersed tube tunnel and the butt joint construction method thereof.
In order to achieve the above purpose, the invention adopts the following technical scheme:
the final joint of the reversible immersed tube tunnel is used for butting a buried section pipe section with a last installed pipe section and comprises a connecting sleeve arranged at the end to be butted of the buried section pipe section, and a jacking pipe section for butting the installed pipe section is sleeved in the connecting sleeve; the inner wall of the jacking pipe joint is provided with a first counterforce bracket, and the inner wall of the buried section pipe section is provided with a second counterforce bracket opposite to the first counterforce bracket; a telescopic pushing piece is arranged between the first counter-force bracket and the second counter-force bracket, and can extend or retract along the axial direction so as to push out or pull back the jacking pipe joint relative to the connecting sleeve; and a thrust component used for preventing the jacking pipe joint from being pushed back after the jacking pipe joint is pushed out to be butted with the installed pipe section is detachably connected between the first counter-force bracket and the second counter-force bracket.
Preferably, the thrust assembly comprises a plurality of first thrust steel supports, one ends of the first thrust steel supports are fixedly connected to the first counter-force brackets, the other ends of the first thrust steel supports penetrate through the end seal door of the to-be-butted end of the buried section pipe section, and the first thrust steel supports can move axially relative to the end seal door; part can dismantle between the first thrust steel support with a plurality of second thrust steel supports that set up along the axial, the one end of second thrust steel support can dismantle connect in the first thrust steel support passes the one end of end seal door, its other end can dismantle connect in the second counter-force bracket.
Preferably, the first thrust steel support is close to one end of the second thrust steel support, and the second thrust steel support is close to one end of the first thrust steel support, and first connecting flanges are welded at one end of the second thrust steel support, and the two first connecting flanges are detachably connected through bolts.
Preferably, the first thrust steel support is close to one end of the first counter-force bracket and is welded with a second connecting flange, a pull rod is arranged in the first counter-force bracket in a penetrating mode along the axial direction, the pull rod penetrates through the second connecting flange, and fastening nuts used for fastening and connecting the first counter-force bracket with the second connecting flange are connected to two ends of the pull rod.
Preferably, the pull rod sleeve is sleeved outside the pull rod, and a gap is reserved between the pull rod sleeve and the pull rod.
Preferably, a first wedge block is welded at one end of the second thrust steel support, which is close to the second counter-force bracket, and a second wedge block matched with the first wedge block is fixedly connected with the second counter-force bracket.
Preferably, the telescopic pushing piece is arranged between the first thrust steel support and the second counter-force bracket in the rest part, one end of the telescopic pushing piece is connected to one end of the first thrust steel support penetrating through the end sealing door, and the other end of the telescopic pushing piece is connected to the second counter-force bracket.
Preferably, a third reactive bracket is arranged on the outer wall of the top of the jacking pipe joint.
Preferably, the final joint of the reversible immersed tube tunnel further comprises a water stop assembly, the water stop assembly comprises three water stops, the first water stop is arranged on the end face of the jacking tube section, which is close to one end of the installed tube section, and the second water stop and the third water stop are arranged on the periphery of the jacking tube section; the second water stop can stretch out and draw back along with stretching out and drawing back of the jacking pipe joint, one end of the second water stop is fixedly connected with the jacking pipe joint, the other end of the second water stop is fixedly connected with the connecting sleeve, the third water stop is sleeved between the jacking pipe joint and the connecting sleeve, and the third water stop is a grouting water stop.
The invention also provides a butt joint construction method of the final joint of the reversible immersed tube tunnel, which comprises the following steps:
pushing out the jacking pipe section through the extension of the telescopic pushing piece until the jacking pipe section is accurately butted with the installed pipe section; if the pushing-out posture of the jacking pipe section cannot realize accurate butt joint with the installed pipe section, the jacking pipe section is pulled back through contraction of the telescopic pushing-out part, and the pushing-out posture is re-pushed out after the posture of the jacking pipe section is adjusted;
discharging water in the joint cavity between the jacking pipe joint and the installed pipe section, and stopping water at the joint of the jacking pipe joint and the installed pipe section;
connecting the thrust assembly between the first and second opposing brackets to thrust the jack pipe section;
and injecting concrete into a gap between the jacking pipe joint and the buried section pipe section to enable the jacking pipe joint and the buried section pipe section to be connected into a whole, and welding the butt joint of the jacking pipe joint and the installed pipe section to finish butt joint.
Compared with the prior art, the invention has the advantages that:
1. according to the final joint of the reversible immersed tube tunnel, through the cooperation of the telescopic pushing piece, the thrust component, the first counter-force bracket and the second counter-force bracket, reversible construction during abutting joint of the jacking tube sections can be realized, the operation mode of the reversible construction is flexible and simple, underwater operation is not needed, and the construction risk is low;
2. when the final joint of the reversible immersed tube tunnel provided by the invention is used for butt joint construction, the main construction is completed in a dry working environment, the underwater operation is less, the construction quality is ensured, the construction period is short, the influence of water depth is small, and the construction cost is low.
Drawings
FIG. 1 is a schematic structural diagram of a final joint of a reversible immersed tunnel according to an embodiment of the present invention;
FIG. 2 is a cross-sectional view taken along line A-A of FIG. 1;
FIG. 3 is a cross-sectional view taken along line B-B of FIG. 1;
FIG. 4 is a cross-sectional view taken along line C-C of FIG. 1;
fig. 5 is an enlarged view of D in fig. 1;
FIG. 6 is an enlarged view at E in FIG. 1;
fig. 7 is a schematic connection diagram of a thrust module and first and second reaction brackets according to an embodiment of the present invention;
fig. 8 is an enlarged view of F in fig. 7;
FIG. 9 is a schematic diagram of a butt joint process of a final joint butt joint construction method of a reversible immersed tunnel according to an embodiment of the present invention;
in the above figures: 1. a buried section pipe section; 2. an installed pipe section; 3. a connecting sleeve; 4. jacking a pipe joint; 5. a first reaction bracket; 6. a second counter-force bracket; 7. a thrust assembly; 71. a first thrust steel support; 72. a second thrust steel support; 73. a first connection flange; 74. a bolt; 75. a first wedge block; 76. a second wedge block; 77. a second connection flange; 8. end sealing the door; 9. sealing the door; 10. a water storage chamber; 11. a bonding chamber; 12. a manhole; 13. a cover plate; 14. a water inlet pipe; 15. a telescopic pushing member; 16. a third reactive corbel; 17. a first water stop; 18. a second water stop; 19. a third water stop; 20. sealing rubber rings; 21. a pull rod; 22. a fastening nut; 23. a pull rod sleeve.
Detailed Description
The present invention will be specifically described below by way of exemplary embodiments. It is to be understood that elements, structures, and features of one embodiment may be beneficially incorporated in other embodiments without further recitation.
In the description of the present invention, it should be noted that the axial direction refers to the horizontal direction in fig. 1; the terms "inner", "outer", "upper", "lower", "front", "rear", and the like refer to an orientation or positional relationship based on the positional relationship shown in fig. 1, for convenience of description and simplicity of description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1-4, the invention relates to a final joint of a reversible immersed tube tunnel, which is used for butting a buried section tube section 1 with a last installed tube section 2, and comprises a connecting sleeve 3 arranged at the end to be butted of the buried section tube section 1, wherein an jacking tube section 4 used for butting the installed tube section 2 is sleeved in the connecting sleeve 3; the inner wall of the jacking pipe joint 4 is provided with a first counter-force bracket 5, and the inner wall of the buried section pipe section 1 is provided with a second counter-force bracket 6 opposite to the first counter-force bracket 5; a telescopic pushing piece 15 is arranged between the first counter-force bracket 5 and the second counter-force bracket 6, and the telescopic pushing piece 15 can extend or retract along the axial direction so as to push out or pull back the jacking pipe joint 4 relative to the connecting sleeve 3; a thrust assembly 7 for preventing the jacking pipe section 4 from being pushed back after the jacking pipe section 4 is pushed out to be butted with the installed pipe section 2 is detachably connected between the first counter-force bracket 5 and the second counter-force bracket 6.
In the final joint of the reversible immersed tube tunnel, the arranged telescopic pushing piece 15 takes the arranged first counter-force bracket 5 and the second counter-force bracket 6 as supports, the jacking tube section 4 can be pushed out to be in butt joint with the installed tube section 2 through the axial extension of the telescopic pushing piece 15, meanwhile, the telescopic pushing piece 15 can also shrink along the axial direction, when the posture of the jacking tube section 4 when pushed out is not in accordance with the requirement, the jacking tube section 4 can be pulled back through the axial shrinkage of the telescopic pushing piece 15, so that the reversible construction during the butt joint is realized, the operation mode of the reversible construction is flexible and simple, the underwater operation is not needed, and the construction risk is small. Further, after the jacking pipe section 4 is pushed out to be accurately abutted with the installed pipe section 2, the jacking pipe section 4 can be prevented from being pushed back through the set thrust component 7, and meanwhile, the thrust component 7 takes the set first counter-force bracket 5 and second counter-force bracket 6 as supports, so that the thrust effect is better compared with the thrust effect of the thrust component in the steel structure arranged at the end part of the buried pipe section 1, and the cost can be greatly reduced.
It should be noted that, in the final joint of the reversible immersed tube tunnel, the jacking tube segment 4 is used for matching and butting with the end to be butted of the installed tube segment 2, so as to ensure that the end face of the jacking tube segment 4 far away from the buried tube segment 1 is matched with the end face of the end to be butted of the installed tube segment 2, as shown in fig. 1. Further, as shown in fig. 1, the jacking pipe section 4, the connecting sleeve 3 and the buried section pipe section 1 are coaxially arranged so as to ensure that the buried section pipe section 1 of the immersed tunnel and the installed pipe section 2 can be coaxially butted. In addition, it should be noted that, the outer wall of the jacking pipe section 4 is slidably matched with the inner wall of the connecting sleeve 3, so as to facilitate pushing out of the jacking pipe section 4, and it should be noted that the jacking pipe section 4 can only be partially pushed out of the connecting sleeve 3, so as to avoid the jacking pipe section 4 from being separated from the connecting sleeve 3.
In the final joint of the reversible immersed tube tunnel, the thrust assembly 7 is used for preventing the jacking tube segment 4 from being pushed back. As shown in fig. 1, 2 and 7, the thrust assembly 7 comprises a plurality of first thrust steel supports 71 axially arranged, one ends of the first thrust steel supports 71 are fixedly connected to the first counter-force brackets 5, the other ends of the first thrust steel supports 71 penetrate through the end seal doors 8 at the ends to be butted of the buried section pipe sections 1, and the first thrust steel supports 71 can move relative to the end seal doors 8 axially; a plurality of second thrust steel supports 72 arranged along the axial direction are detachably connected between part of the first thrust steel supports 71 and the second counter-force brackets 6, one end of each second thrust steel support 72 is detachably connected to one end of each first thrust steel support 71 penetrating through the end seal door 8, and the other end of each second thrust steel support 72 is detachably connected to the second counter-force brackets 6. As shown in fig. 3, the first thrust steel supports 71 are uniformly distributed at the edge of the end seal door 8 in the circumferential direction, and the number of the first thrust steel supports 71 provided in the present embodiment is 24. As shown in fig. 4, the number of second thrust steel supports 72 provided in the present embodiment is 18, and the remaining first thrust steel supports 71 are detachably connected to the second thrust steel supports 72 except for 2 first thrust steel supports 71 near the top of the buried section pipe section 1 and 4 first thrust steel supports 71 near the bottom of the buried section pipe section 1. It should be further noted that before pushing out the jacking pipe segment 4, the second thrust steel support 72 needs to be removed, and the second thrust steel support 72 is connected only after the jacking pipe segment 4 is pushed out to be in accurate abutment with the installed pipe segment 2. In addition, the first thrust steel support 71 and the second thrust steel support 72 may be steel columns. In comparison with the thrust assembly 7 adopting the pressure maintaining manner of the jack, in the thrust assembly 7 with the structure provided by the embodiment, each first thrust steel support 71 or each second thrust steel support 72 can bear 500t of axial force, the thrust effect is better, and auxiliary thrust is not needed by adopting other manners. Meanwhile, the thrust assembly 7 provided in this embodiment is divided into two sections, wherein the first thrust steel support 71 is fixedly connected to the jacking pipe section 4 and can move along with the jacking pipe section, and the second thrust steel support 72 is completely located in the dry working environment of the buried section pipe section 1, and the disassembly connection can be completely carried out by workers entering the buried section pipe section 1 for operation, so that the construction is convenient and the risk is small.
For the specific connection between the first thrust steel support 71 and the second thrust steel support 72, as shown in fig. 7, one end of the first thrust steel support 71 close to the second thrust steel support 72 and one end of the second thrust steel support 72 close to the first thrust steel support 71 are welded with first connecting flanges 73, and the two first connecting flanges 73 are detachably connected through bolts 74.
For the specific connection between the first thrust steel support 71 and the first reaction bracket 5, as shown in fig. 8, one end of the first thrust steel support 71, which is close to the first reaction bracket 5, is welded with a second connecting flange 77, a pull rod 21 is axially arranged in the first reaction bracket 5 in a penetrating manner, the pull rod 21 passes through the second connecting flange 77, and two ends of the pull rod 21 are in threaded connection with fastening nuts 22 for fastening the first reaction bracket 5 and the second connecting flange 77. Further, as shown in fig. 8, a pull rod sleeve 23 is sleeved outside the pull rod 21, and a gap is reserved between the pull rod sleeve 23 and the pull rod 21, so that the pull rod 21 is ensured to have a certain moving space, and the pull rod 21 is prevented from being pulled when the jacking pipe joint 4 moves.
For the specific connection between the second thrust steel support 72 and the second reaction bracket 6, as shown in fig. 7, a first wedge block 75 is welded at one end of the second thrust steel support 72 close to the second reaction bracket 6, and a second wedge block 76 matched with the first wedge block 75 is fixedly connected to the second reaction bracket 6. When the second thrust steel support 72 is connected, an operator only needs to accurately calculate the length of the required second thrust steel support 72 according to the pushing-out length of the jacking pipe joint 4, then the second thrust steel support 72 with a proper length is propped between the first thrust steel support 71 and the second counter-force bracket 6 through sliding fit of the first wedge block 75 and the second wedge block 76, and then the first thrust steel support 71 and the second thrust steel support 72 are connected.
In addition, as shown in fig. 6, a sealing rubber ring 20 is arranged between the periphery of the first thrust steel support 71 and the end sealing door 8 of the end to be abutted of the buried section pipe section 1, so as to prevent water flow from flowing into the buried section pipe section 1 through a gap between the periphery of the first thrust steel support 71 and the end sealing door 8, and influence the dry working environment in the buried section pipe section 1.
In the final joint of the reversible immersed tube tunnel, the telescopic pushing piece 15 is used for pushing out or pulling back the pushing-in tube section 4. As shown in fig. 2 or 4, the telescopic pushing member 15 is axially disposed between the remaining first thrust steel support 71 and the second reaction bracket 6, one end of the telescopic pushing member 15 is connected to one end of the first thrust steel support 71 penetrating through the end seal door 8, and the other end is connected to the second reaction bracket 6. The remaining first thrust steel support 71 refers to the first thrust steel support 71 to which the second thrust steel support 72 is not connected. It should be noted that, in order to ensure the balance when the jacking pipe section 4 is pushed out, as shown in fig. 4, the telescopic pushing members 15 are required to be symmetrically arranged, and in this embodiment, specifically: the left side and the right side near the top of the buried section pipe section 1 are respectively provided with 1 telescopic pushing piece 15, and the left side and the right side near the bottom of the buried section pipe section 1 are respectively provided with 2 telescopic pushing pieces 15. Further, as a preference, the telescopic pushing member 15 is embodied as a jack.
Further, as shown in fig. 5, a third reaction bracket 16 is provided on the outer wall of the top of the jacking pipe section 4. When the arranged telescopic pushing piece 15 fails, the pulling back of the jacking pipe section 4 can be realized by arranging a cushion block and a jack between the top of the installed pipe section 2 and the third reflecting bracket 16.
As shown in fig. 5, the final joint of the reversible immersed tube tunnel further comprises a water stop assembly, the water stop assembly comprises three water stops, a first water stop 17 is arranged on the end face of the jacking pipe section 4, which is close to one end of the installed pipe section 2, and a second water stop 18 and a third water stop 19 are both arranged on the periphery of the jacking pipe section 4; the second water stop 18 can stretch and retract along with the stretching of the jacking pipe joint 4, one end of the second water stop 18 is fixedly connected with the jacking pipe joint 4, the other end of the second water stop is fixedly connected with the connecting sleeve 3, the third water stop 19 is sleeved between the jacking pipe joint 4 and the connecting sleeve 3, and the third water stop 19 is a grouting water stop. Through the three waterstops that set up, can effectively reach the stagnant water requirement.
In addition, it should be noted that the final joint of the reversible immersed tunnel provided in this embodiment further has a water storage chamber 10 similar to the one in CN107938709a to realize hydraulic pressure connection and water stop by utilizing water pressure difference. Specifically, as shown in fig. 1, a sealing door 9 is arranged in the jacking pipe section 4, a water storage cavity 10 capable of storing water is formed among the jacking pipe section 4, the sealing door 9, the connecting sleeve 3 and the end sealing door 8 arranged in the buried section pipe section 1, a water inlet pipe 14 communicated with the water storage cavity 10 is arranged at the top of the connecting sleeve 3, and a water inlet valve (not shown in the figure) is arranged at the water inlet pipe 14. During butt joint construction, the water inlet valve is opened to enable the water storage cavity 10 to be communicated with the outside, water flows into the water storage cavity 10 through the water inlet pipe 14 and fills the whole water storage cavity 10, after the jacking pipe joint 4 is matched and butted with the installed pipe section 2, water in the combination cavity 11 between the jacking pipe joint 4 and the installed pipe section 2 is discharged, at the moment, water pressure difference is formed between the water storage cavity 10 and the combination cavity 11, under the action of the water pressure difference, the jacking pipe joint 4 is propped against the installed pipe section 2, and temporary water stop between the jacking pipe joint 4 and the installed pipe section 2 is enhanced. The joint chamber 11 between the jacking pipe section 4 and the installed pipe section 2 is surrounded by the sealing door 9 in the jacking pipe section 4, the end sealing door 8 provided on the installed pipe section 2, and the pipe walls of the jacking pipe section 4 and the installed pipe section 2. In addition, in order to facilitate the diver to enter the water storage cavity 10 to measure the abutting condition of the jacking pipe joint 4, the top of the connecting sleeve 3 is also provided with a manhole 12 and a cover plate 13 for closing the manhole 12. In the present embodiment, the water inlet pipe 14 is provided above the cover plate 13 for convenience of construction.
The invention further provides a butt joint construction method of the final joint of the reversible immersed tube tunnel, which is shown in fig. 9, and comprises the following steps:
s1: after the last installed pipe section 2 close to the buried section pipe section 1 is sunk and installed in place, the jacking pipe section 4 is pushed out by the extension of the telescopic pushing piece 15 in the final joint of the reversible immersed tunnel of any one of the embodiments until the last installed pipe section 2 is accurately butted with the installed pipe section 2; if the pushing-out posture of the pushing-in pipe section 4 cannot achieve accurate butt joint with the installed pipe section 2, the pushing-in pipe section 4 is pulled back through shrinkage of the telescopic pushing-out piece 15, and the pushing-out pipe section 4 is pushed out again after the posture of the pushing-in pipe section is adjusted.
S2: after the jacking pipe section 4 is accurately butted with the installed pipe section 2, discharging water in the joint cavity 11 between the jacking pipe section 4 and the installed pipe section 2, and stopping water at the butted position of the jacking pipe section 4 and the installed pipe section 2. It should be noted that, the water stop at the butt joint of the jacking pipe section 4 and the installed pipe section 2 can be performed by matching the first water stop 17 with the hydraulic pressure welding water stop.
S3: after the water stop reaches the requirement, a thrust component 7 is connected between the first counter-force bracket 5 and the second counter-force bracket 6 to thrust the jacking pipe joint 4. When the thrust module 7 including the first thrust steel support 71 and the second thrust steel support 72 is used, the first thrust steel support 71 moves in synchronization with the pushing out of the jack-in pipe section 4, and therefore, in this step, the second thrust steel support 72 is only required to be connected between the first thrust steel support 71 and the second reaction bracket 6. If an error is found in the abutting joint between the jacking pipe section 4 and the installed pipe section 2 after the thrust, the second thrust steel support 72 is removed, the jacking pipe section 4 is pulled back by the contraction of the telescopic pushing member 15, the posture of the jacking pipe section 4 is adjusted, and then the jacking pipe section is pushed out again, and the operations in step S2 and this step are performed again.
S4: after the thrust reaches the requirement, concrete is injected into the gap between the jacking pipe section 4 and the buried section pipe section 1, so that the jacking pipe section 4 and the buried section pipe section 1 are connected into a whole, and welding construction is carried out on the butt joint of the jacking pipe section 4 and the installed pipe section 2, so that the butt joint is completed.
According to the final joint of the reversible immersed tube tunnel, provided by the invention, reversible construction during butting of the jacking tube segment 4 can be realized through the cooperation of the telescopic pushing piece 15, the thrust assembly 7, the first counter-force bracket 5 and the second counter-force bracket 6, the operation mode of the reversible construction is flexible and simple, underwater operation is not needed, and the construction risk is low. Moreover, when the final joint of the reversible immersed tube tunnel is adopted for butt joint construction, the main construction is finished in a dry working environment, the underwater operation is less, the construction quality is ensured, the construction period is short, the influence of water depth is small, and the construction cost is low.
Claims (10)
1. The final joint of the reversible immersed tube tunnel is used for butt joint of a buried section tube section (1) and a last installed tube section (2), and comprises a connecting sleeve (3) arranged at the end to be butt-jointed of the buried section tube section (1), wherein a jacking tube section (4) for butt-jointing with the installed tube section (2) is sleeved in the connecting sleeve (3); the method is characterized in that: the outer wall of the jacking pipe joint (4) is in sliding fit with the inner wall of the connecting sleeve (3); the inner wall of the jacking pipe joint (4) is provided with a first counterforce bracket (5), and the inner wall of the buried section pipe section (1) is provided with a second counterforce bracket (6) opposite to the first counterforce bracket (5); a telescopic pushing piece (15) is arranged between the first counter-force bracket (5) and the second counter-force bracket (6), and the telescopic pushing piece (15) can extend or retract along the axial direction so as to push out or pull back the jacking pipe joint (4) relative to the connecting sleeve (3); and a thrust component (7) for preventing the jacking pipe joint (4) from being pushed back after the jacking pipe joint (4) is pushed out to be butted with the installed pipe section (2) is detachably connected between the first counter-force bracket (5) and the second counter-force bracket (6).
2. The reversible immersed tube tunnel end fitting of claim 1, wherein: the thrust assembly (7) comprises a plurality of first thrust steel supports (71), one ends of the first thrust steel supports (71) are fixedly connected to the first counter-force brackets (5), the other ends of the first thrust steel supports (71) are arranged on the end seal doors (8) of the to-be-butted ends of the buried section pipe sections (1) in a penetrating mode, and the first thrust steel supports (71) can move relative to the end seal doors (8) along the axial direction; part first thrust steel support (71) with can dismantle be connected with a plurality of second thrust steel supports (72) that set up along the axial between second counter-force bracket (6), the one end of second thrust steel support (72) can dismantle connect in first thrust steel support (71) pass the one end of end seal door (8), its other end can dismantle connect in second counter-force bracket (6).
3. The reversible immersed tube tunnel end fitting of claim 2, wherein: the first thrust steel support (71) is close to one end of the second thrust steel support (72), and one end of the second thrust steel support (72) close to the first thrust steel support (71) is welded with a first connecting flange (73), and the two first connecting flanges (73) are detachably connected through bolts (74).
4. The reversible immersed tube tunnel end fitting of claim 2, wherein: the first thrust steel support (71) is close to one end of the first counter-force bracket (5) and is welded with a second connecting flange (77), a pull rod (21) is arranged in the first counter-force bracket (5) in a penetrating mode along the axial direction, the pull rod (21) penetrates through the second connecting flange (77), and two ends of the pull rod (21) are connected with fastening nuts (22) used for fastening the first counter-force bracket (5) and the second connecting flange (77).
5. The reversible immersed tube tunnel end fitting of claim 4, wherein: the pull rod (21) is sleeved with a pull rod sleeve (23), and a gap is reserved between the pull rod sleeve (23) and the pull rod (21).
6. The reversible immersed tube tunnel end fitting of claim 2, wherein: and a first wedge block (75) is welded at one end of the second thrust steel support (72) close to the second counter-force bracket (6), and a second wedge block (76) matched with the first wedge block (75) is fixedly connected with the second counter-force bracket (6).
7. The reversible immersed tube tunnel end fitting of claim 2, wherein: the telescopic pushing piece (15) is arranged between the first thrust steel support (71) and the second counter-force bracket (6) in the rest, one end of the telescopic pushing piece (15) is connected to one end of the first thrust steel support (71) penetrating through the end sealing door (8), and the other end of the telescopic pushing piece is connected to the second counter-force bracket (6).
8. The reversible immersed tube tunnel end fitting of claim 1, wherein: the outer wall at the top of the jacking pipe joint (4) is provided with a third reactive corbel (16).
9. The reversible immersed tube tunnel end fitting of claim 1, wherein: the final joint of the reversible immersed tube tunnel further comprises a water stopping assembly, the water stopping assembly comprises three water stops, a first water stop (17) is arranged on the end face, close to one end of the installed tube section (2), of the jacking tube section (4), and a second water stop (18) and a third water stop (19) are both arranged on the periphery of the jacking tube section (4); the second water stop (18) can stretch out and draw back along with stretching out and drawing back of the jacking pipe joint (4), one end of the second water stop (18) is fixedly connected with the jacking pipe joint (4), the other end of the second water stop is fixedly connected with the connecting sleeve (3), the third water stop (19) is sleeved between the jacking pipe joint (4) and the connecting sleeve (3), and the third water stop (19) is a grouting water stop.
10. The butt joint construction method of the final joint of the reversible immersed tube tunnel according to any one of claims 1 to 9, comprising the steps of:
pushing out the jacking pipe section (4) through the extension of the telescopic pushing piece (15) until the jacking pipe section is accurately butted with the installed pipe section (2); if the pushing-out posture of the jacking pipe joint (4) cannot achieve accurate butt joint with the installed pipe section (2), the jacking pipe joint (4) is pulled back through shrinkage of the telescopic pushing piece (15), and the pushing-out posture of the jacking pipe joint (4) is adjusted and then is pushed out again;
discharging water in a joint cavity (11) between the jacking pipe joint (4) and the installed pipe section (2), and stopping water at the joint of the jacking pipe joint (4) and the installed pipe section (2);
connecting the thrust assembly (7) between the first counterforce bracket (5) and the second counterforce bracket (6) so as to thrust the jacking pipe joint (4);
and injecting concrete into a gap between the jacking pipe joint (4) and the buried section pipe section (1), connecting the jacking pipe joint (4) and the buried section pipe section (1) into a whole, and welding the butt joint of the jacking pipe joint (4) and the installed pipe section (2) to finish butt joint.
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| CN113309146B (en) * | 2021-05-31 | 2023-01-20 | 中交第一航务工程局有限公司 | Final joint water stopping device and mounting method |
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| CN115305957B (en) * | 2022-08-04 | 2024-01-26 | 广州市市政工程设计研究总院有限公司 | Final joint for immersed tube tunnel and its construction method |
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| CN115653003B (en) * | 2022-12-28 | 2023-03-17 | 中交第一航务工程局有限公司 | Backstop system of jacking segment and jacking type final joint construction method |
| CN116220107B (en) * | 2023-05-08 | 2023-09-22 | 中交第一航务工程局有限公司 | Method for controlling synchronous pushing of final joint steel support by jacking segment method |
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