CN115198798A - Immersed tunnel shoreside joint installation structure and construction method - Google Patents
Immersed tunnel shoreside joint installation structure and construction method Download PDFInfo
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- CN115198798A CN115198798A CN202210629576.9A CN202210629576A CN115198798A CN 115198798 A CN115198798 A CN 115198798A CN 202210629576 A CN202210629576 A CN 202210629576A CN 115198798 A CN115198798 A CN 115198798A
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- 238000010276 construction Methods 0.000 title claims abstract description 69
- 238000009434 installation Methods 0.000 title claims abstract description 37
- 210000001503 joint Anatomy 0.000 claims abstract description 84
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 28
- 230000008093 supporting effect Effects 0.000 claims description 20
- 239000002689 soil Substances 0.000 claims description 18
- 238000007789 sealing Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 description 21
- 230000002349 favourable effect Effects 0.000 description 16
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- 238000007654 immersion Methods 0.000 description 4
- 230000001737 promoting effect Effects 0.000 description 4
- 230000009286 beneficial effect Effects 0.000 description 3
- 230000000903 blocking effect Effects 0.000 description 3
- 238000006073 displacement reaction Methods 0.000 description 3
- 239000011150 reinforced concrete Substances 0.000 description 3
- 239000004567 concrete Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
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- 238000003032 molecular docking Methods 0.000 description 2
- 238000005299 abrasion Methods 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
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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
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
- E02D27/14—Pile framings, i.e. piles assembled to form the substructure
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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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Abstract
The embodiment of the application provides an immersed tube tunnel shoreside joint installation structure and a construction method, relates to the technical field of immersed tube tunnels, and is used for solving the problems that the construction difficulty of butt joint of an immersed tube and a shoreside joint is high, the butt joint precision is poor, and the reliability of a butt joint position is low. The embodiment of the application provides a immersed tube tunnel bank side joint mounting structure includes bank side joint, immersed tube and cushion cap structure. The sinking pipe is arranged at the bottom of a water area and close to a shoreside joint, and the shoreside joint and the sinking pipe are butted to form a tunnel; the bearing platform structure is arranged below the end part of the butt joint of the immersed tube and the shoreside joint and is used for bearing the end part of the butt joint of the immersed tube and the shoreside joint. The embodiment of the application provides a immersed tube tunnel shoreside connector mounting structure is used for forming the immersed tube tunnel.
Description
Technical Field
The application relates to the technical field of immersed tube tunnels, in particular to an immersed tube tunnel shoreside connector installation structure and a construction method.
Background
The immersed tube tunnel is an underwater tunnel, and is constructed by firstly floating a plurality of tube sections onto the sea surface or river surface and the like, then sinking and installing the tube sections in a foundation trench dug at the bottom in advance, and finally sequentially connecting the end parts of the tube sections.
The connection of the immersed tube tunnel at the butt joint of the shore is one of the key processes for constructing the immersed tube tunnel, and at present, a nose support structure is generally arranged at the bottom of the water, and the tube section close to the shore in the water is supported by the nose support structure. However, the butt joint using the nose pad structure has the following problems:
the nose pad structure has small bearing capacity and relatively poor support stability, and the precision and reliability of the butt joint of the pipe section and the shore joint are influenced; the position adjustment range of the pipe section on the nose support structure is small, the longitudinal adjustment distance is generally within 100mm, and the transverse adjustment distance is within 150mm, so that the underwater construction difficulty is high, the process is complex, the sinking and butt joint time is long, and the construction speed is low; the area that the pipeline section received nose support structural support is less, and the butt joint department of pipeline section and bank joint can not contact with nose support structure, and the atress of butt joint department is great, and the reliability is lower, and during immersed tube tunnel was in service, the butt joint department receives external environmental factor such as the influence of earthquake and appears warping, the scheduling problem that leaks easily.
Disclosure of Invention
In view of this, the embodiment of the application provides an immersed tube tunnel shoreside connector installation structure and a construction method, which are used for solving the problems that the butt joint of an immersed tube and a shoreside connector is difficult to construct, the butt joint precision is poor, and the reliability of a butt joint is low.
In a first aspect, an embodiment of the present application provides an immersed tube tunnel shoreside connector mounting structure, which includes a shoreside connector, an immersed tube, and a bearing platform structure. The sinking pipe is arranged at the bottom of a water area and close to a shoreside joint, and the shoreside joint and the sinking pipe are butted to form a tunnel; the bearing platform structure is arranged below the end part of the butt joint of the immersed tube and the shore joint and is used for bearing the end part of the butt joint of the immersed tube and the shore joint.
In some optional embodiments of the present application, the cap structure comprises a support structure and a cap body. Wherein the supporting structure is used for standing in soil at the bottom of a water area; the bearing platform body is supported on the top of the supporting structure so as to bear the end part of the butt joint of the immersed tube and the shore joint.
In some optional embodiments of the present application, the cap body comprises a shoreside bearing area and a immersed tube bearing area. The shoreside bearing area is used for bearing shoreside joints; the immersed tube bearing area is used for bearing the end part of the butt joint of the immersed tube, the immersed tube bearing area is lower than the shoreside bearing area, bearing bulges extending upwards are arranged in the immersed tube bearing area, and the upper surfaces of the bearing bulges are flush with the shoreside bearing area.
In some optional embodiments in this application, there is a construction avoidance gap between the bearing protrusion and the shoreside bearing area.
In some optional embodiments in this application, the support structure includes a sheet pile and a foundation pile, the sheet pile extends along the shore, the sheet pile and the foundation pile respectively support two ends of the bearing platform body in the direction perpendicular to the extending direction of the shore, and the sheet pile is located on one side of the foundation pile near the shore.
In some optional embodiments in this application, immersed tube tunnel shoreside joint mounting structure still includes the dog, and the dog setting is at the tip of cushion cap structure along shoreside extending direction, and the dog extends along upper and lower direction, and the upper surface of dog is higher than the upper surface of cushion cap body, along shoreside extending direction, and the dog is located one side of immersed tube. The upper surface of the stop block is higher than the upper surface of the bearing platform body so as to prevent the immersed tube from generating transverse displacement after being immersed.
In some optional embodiments in this application, the number of the stoppers is two, two stoppers are respectively disposed at two ends of the bearing platform structure along the extending direction of the shore, and the immersed tube is located between the two stoppers, so that the immersed tube can be quickly and automatically slid into the tunnel installation position after being immersed.
In some optional embodiments of the present application, an upper end of the inner side of the stopper is inclined away from the other stopper.
In a second aspect, an embodiment of the present application provides a construction method, for constructing a pipe caisson shore connection installation structure provided in the first aspect of the embodiment of the present application, where the construction method includes: constructing a bearing platform structure; and butting the immersed tube with a shore joint on a bearing platform structure.
In some optional embodiments of the present application, the bearing platform structure includes a shoreside bearing area and a immersed tube bearing area, the shoreside bearing area is used for bearing the shoreside joint, the immersed tube bearing area is arranged corresponding to the immersed tube, and the immersed tube bearing area is lower than the shoreside bearing area; an upward bearing bulge is arranged in the immersed tube bearing area, the upper surface of the bearing bulge is flush with the shoreside bearing area, and the upper surface of the bearing bulge is used for bearing the immersed tube; butt joint the immersed tube and the shore connection on the bearing platform structure comprises the following steps: overlapping the end part of the immersed tube on the bearing bulge; pushing the end part of the immersed tube towards the shore connector until the immersed tube is contacted with the end part of the shore connector; and the immersed tube and the shore connector are hermetically connected and fixed.
In some optional embodiments of the present application, the cap structure comprises a support structure for standing in soil at the bottom of the body of water and a cap body; the top at bearing platform body is fixed at bearing structure to bear the weight of the tip and the bank of butt joint department of immersed tube and connect, construction bearing platform structure includes: constructing a supporting structure on the bank; constructing a cofferdam structure on the bank, isolating a waterless construction area, and excavating a foundation pit on the bank; constructing a foundation pit support in the foundation pit; constructing a bearing platform body on the supporting structure; wherein, cushion cap body is located the foundation ditch.
In some optional embodiments of the present application, the platform body includes a shoreside bearing area and a immersed tube bearing area, the shoreside bearing area is used for bearing a shoreside joint, the immersed tube bearing area is disposed corresponding to an end of the butt joint of the immersed tube, and the shoreside bearing area and the shoreside joint are cast together.
In some optional embodiments of the present application, before docking the immersed tube with the shoreside joint on the cap structure, and after constructing the cap body on the support structure, the construction method further comprises: backfilling and covering the foundation pit; removing at least the cofferdam structure at the pre-installation position part of the immersed tube; excavating a foundation trench at a pre-installation position of the immersed tube; after the immersed tube and the shore connection are butted on the bearing platform structure, the construction method further comprises the following steps: and backfilling the base groove.
In some optional embodiments of the present application, the construction method further comprises, before backfilling the foundation trench, after abutting the immersed tube with the shoreside joint on the cap structure: and filling a gap between the immersed tube and the bearing platform and/or a gap between the upper part of the foundation tank and the immersed tube to finish the immersed tube foundation.
The utility model provides a immersed tube tunnel bank side joint mounting structure, the butt joint department that utilizes the cushion cap to bank side joint and immersed tube supports, and cushion cap stability is stronger, and bearing capacity is stronger, and the bank side joint can be on the cushion cap with the stable support of the tip of immersed tube, is favorable to promoting the reliability of butt joint department. Under the stable support of cushion cap, the immersed tube can carry out comparatively stable removal on the cushion cap, is favorable to promoting the butt joint precision of immersed tube and bank joint butt joint in-process, and is favorable to staff's operation, reduces the butt joint degree of difficulty. The bearing platform is convenient to manufacture into a relatively large size, the moving range of the immersed tube on the bearing platform is large, the longitudinal length can reach more than 500mm, the transverse length can reach more than 300mm, and the construction difficulty can be reduced. Moreover, the larger size of the bearing platform is convenient for the immersed tube to fall on the bearing platform in the process of immersion, which is beneficial to reducing the construction difficulty of immersion of the immersed tube. In addition, the contact area of the bearing platform and the immersed tube and the contact area of the bearing platform and the shore-side joint are large, the bearing platform can be in contact with the butt joint, the butt joint can be supported by the bearing platform, the stress of the butt joint can be reduced, and the reliability of the butt joint can be improved. Therefore, the immersed tube tunnel shoreside joint installation structure provided by the embodiment of the application has the advantages of smaller construction difficulty, higher butt joint precision and higher reliability of butt joint.
Drawings
Fig. 1 is a top view of a pipe caisson slab-side connector installation structure in an embodiment of the present application;
fig. 2 is a longitudinal sectional view of a shore-side joint installation structure of a immersed tunnel according to an embodiment of the present application;
fig. 3 is a schematic structural view of a shoreside joint mounting structure of an immersed tube tunnel before an immersed tube is immersed in an embodiment of the present application;
fig. 4 is a schematic structural diagram of a shoreside joint mounting structure of an immersed tunnel after immersed pipes are immersed in the embodiment of the present application;
fig. 5 is a longitudinal sectional view of a shore-side joint installation structure of a immersed tube tunnel without removing a cofferdam structure in an embodiment of the present application;
fig. 6 is a top view of a shoreside joint installation structure of an immersed tube tunnel without removing a cofferdam structure in an embodiment of the present application;
fig. 7 is a top view of a shore-side joint installation structure of the immersed tube tunnel with the cofferdam structure removed in an embodiment of the present application;
FIG. 8 is a schematic flow chart illustrating a construction method according to an embodiment of the present disclosure;
fig. 9 is a schematic flow chart illustrating the butt joint of the immersed tube and the shore connection joint according to an embodiment of the present application;
FIG. 10 is a schematic flow chart illustrating the construction of a bearing platform structure according to an embodiment of the present disclosure;
FIG. 11 is a second schematic flow chart illustrating a construction method according to an embodiment of the present application;
fig. 12 is a third schematic flow chart of a construction method in an embodiment of the present application.
Reference numerals are as follows:
01-water area; 011-bottom of water area; 02-bank; 03-shoreside structure; 031-dyke of preventing flood; 04-base groove; 05-sinking a pipe foundation; 06-backfilling a covering layer with the immersed tube; 07-cofferdam structure; 071-cofferdam lattice; 072-lattice support; 08-a retaining wall; 09-backfilling a covering layer on the bank; 1-a shoreside joint; 2-sinking the tube; 3-a cushion cap structure; 31-a support structure; 311-sheet piling; 312-foundation piles; 32-a cushion cap body; 321-shoreside bearing area; 322-immersed tube bearing area; 3221-carrying projection; 323-construction avoiding the gap; 33-stop block.
Detailed Description
It should be noted that the embodiments and technical features of the embodiments in the present application may be combined with each other without conflict, and the detailed description in the detailed description should be understood as an explanation of the gist of the present application and should not be construed as an undue limitation to the present application.
In the embodiments of the present application, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present application, "a plurality" means two or more unless otherwise specified.
In the embodiments of the present application, unless otherwise explicitly stated or limited, the term "connected" is to be understood broadly, for example, "connected" may be a fixed connection, a detachable connection, or an integral body; may be directly connected or indirectly connected through an intermediate.
In the embodiments of the present application, the terms "include", "include" or any other variations are intended to cover non-exclusive inclusions, so that a process, a method, an article, or an apparatus including a series of elements includes not only those elements but also other elements not explicitly listed, or further includes elements inherent to such a process, a method, an article, or an apparatus. Without further limitation, an element defined by the phrases "comprising a component of' 8230; \8230;" does not exclude the presence of another like element in a process, method, article, or apparatus that comprises the element.
In the embodiments of the present application, words such as "exemplary" or "for example" are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" or "e.g.," is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "exemplary" or "such as" is intended to present concepts related in a concrete fashion.
In recent years, immersed tube tunnels are developed rapidly and are widely applied to the industries such as subways, highways, urban roads, water delivery and the like. The immersed tube tunnel is an underwater tunnel, and is constructed by firstly floating a plurality of tube sections onto the sea surface or river surface and the like, then sinking and installing the tube sections in a foundation trench dug at the bottom in advance, and finally sequentially connecting the end parts of the tube sections.
The connection of the immersed tube tunnel at the butt joint of the shore is one of the key processes for constructing the immersed tube tunnel, the butt joint is a weak link of the immersed tube tunnel, and the position of the tube section close to the butt joint needs to be supported, so that the butt joint has higher reliability. Specifically, in the related art, a nose support structure is generally used for supporting, the nose support structure is a U-shaped structure, two free ends of the U-shaped structure are inserted into soil at the bottom of a water, and a cross beam between two arms of the U-shaped structure is used for supporting a pipe section. The stress of the butt joint of the supported pipe sections is relatively small, and the reliability of the butt joint is improved. Moreover, the arrangement of the nose support structure is also beneficial for the worker to adjust the position of the pipe section, and particularly, the worker can adjust the relative position of the pipe section and the shore joint by adjusting the position of the pipe section on the nose support structure, so that the pipe section is accurately butted with the shore joint.
However, the butt joint using the nose pad structure has the following problems: the nose pad structure has small bearing capacity and relatively poor support stability, and the precision and reliability of the butt joint of the pipe section and the shore joint are influenced; the position adjustment range of the pipe section on the nose support structure is small, the longitudinal adjustment distance is generally within 100mm, the transverse adjustment distance is within 150mm, the transverse direction refers to the extending direction of a cross beam between two arms of the U-shaped structure, and the longitudinal direction refers to the perpendicular direction of the extending direction of the cross beam, so that the pipe section needs to be accurately sunk on the nose support structure, the underwater construction difficulty is large, the process is complex, and the construction speed is slow; only the cross beam between the two arms of the U-shaped structure is in contact with the pipe section, the area of the pipe section supported by the nose support structure is small, the butt joint of the pipe section and the shore joint cannot be in contact with the nose support structure, the stress of the butt joint is large, the reliability is low, and during the service period of the immersed tube tunnel, the butt joint is easily influenced by external environmental factors such as earthquake and uneven settlement of a weak stratum, so that the problems of deformation, water leakage and the like occur.
In view of the above, referring to fig. 1 and fig. 2, an embodiment of the present application provides a shore connection installation structure for a immersed tunnel, including a shore connection 1, an immersed tube 2, and a bearing platform structure 3. The sinking pipe 2 is arranged at the bottom 011 of a water area and close to the shore connector 1, and the shore connector 1 and the sinking pipe 2 are butted to form a tunnel; the bearing platform structure 3 is arranged below the end part of the butt joint of the immersed tube 2 and the shore-side joint 1 and is used for bearing the end part of the butt joint of the immersed tube 2 and the shore-side joint 1.
The upper end of the bearing platform structure 3 is a platform made of reinforced concrete, and can bear larger load. The butt joint department that utilizes cushion cap structure 3 butt joint 1 and immersed tube 2 supports, and cushion cap structure 3 stability is stronger, and bearing capacity is stronger, and the butt joint department's reliability is favorable to promoting on cushion cap structure 3 to the support that the tip of shoreside joint 1 and immersed tube 2 can be stable. Under the stable support of cushion cap structure 3, immersed tube 2 can carry out comparatively stable removal on cushion cap structure 3, is favorable to promoting the butt joint precision of immersed tube 2 and 1 butt joint in-process of bank side joint, and is favorable to staff's operation, reduces the butt joint degree of difficulty. The bearing platform structure 3 is convenient to manufacture into a relatively large size, the moving range of the immersed tube 2 on the bearing platform structure 3 is large, the longitudinal length can reach more than 500mm, the transverse length can reach more than 300mm, and the construction difficulty can be reduced. Moreover, the large size of the bearing platform structure 3 is convenient for the immersed tube 2 to fall on the bearing platform structure 3 in the process of immersion, and the construction difficulty of immersion of the immersed tube 2 is reduced. In addition, the contact area between the bearing platform structure 3 and the immersed tube 2 and the contact area between the bearing platform structure 3 and the shore-side joint 1 are both large, the bearing platform structure 3 can be in contact with the butt joint, and the butt joint can be supported by the bearing platform structure 3, so that the stress of the butt joint can be reduced, the deformation coordination of the butt joint can be improved, and the reliability of the butt joint can be improved. Therefore, the immersed tube tunnel shoreside joint installation structure provided by the embodiment of the application has the advantages of smaller construction difficulty, higher butt joint precision and higher reliability of butt joint.
It should be noted that the end of the immersed tube 2 where it is butted against is the end of the immersed tube 2 where it is butted against the shore connection 1.
It should be noted that the shore connection 1 refers to the end of the shore buried section for connecting with the submerged pipe 2 located in water, and after the end of the shore connection 1 and the end of the submerged pipe 2 are butted, the inner cavity of the shore buried section is communicated with the inner cavity of the submerged pipe 2 to form a tunnel for connecting a water area and land. Specifically, referring to fig. 3 and 4, in some embodiments, a bank structure 03 is disposed on and fixed to a bank 02, including a flood bank 031, etc., the right side of the bank structure 03 is a water area 01, and a bank connector 1 is an end of a buried segment extending from the flood bank 031 into the water area 01. The water area 01 may be a river, a lake, a sea, or the like.
Further, referring to fig. 1 and fig. 2, the platform structure 3 includes a supporting structure 31 and a platform body 32. Wherein the supporting structure 31 is used for standing in the soil of the bottom 011 of the water area; the cap body 32 is supported on top of the support structure 31 to carry the end of the butt joint of the immersed tube 2 and the shoreside joint 1. Like this structural style, bearing structure 31 is the pile foundation of cushion cap structure 3 for stretch into soil, as the basis of cushion cap structure 3, guarantee cushion cap structure 3's stability. The platform body 32 that is the pile foundation top is made by reinforced concrete, and when the quantity of pile foundation is a plurality of, the pile foundation body 32 is connected a plurality of pile foundation's top. The cushion cap body 32 is located below the end of the butt joint of the immersed tube 2 and the shoreside joint 1 to bear the end of the butt joint of the immersed tube 2 and the shoreside joint 1.
In some embodiments, the support structure 31 includes a sheet pile 311 and a foundation pile 312, the sheet pile 311 extends along the shore, the sheet pile 311 and the foundation pile 312 respectively support two ends of the bearing platform body 32 along the direction perpendicular to the extending direction of the shore, and the sheet pile 311 is located on one side of the foundation pile 312 near the shore. In such a structure, the foundation pile 312 is inserted deep into the soil to secure the stability of the cap body 32. The sheet pile 311 is used for forming a blocking surface along the extending direction of the shoreside, and on one hand, is used for blocking water flow to brush soil at the bottom of the shoreside structure 03, reducing impact of water flow, silt and the like on the shoreside, and reducing abrasion of the shoreside structure 03; on the other hand is at river course drainage, diversion in-process for reduce the loss of the silt of bank structure 03 bottom, in order to reduce the damage that bank structure 03 received, bank joint 1 installs on bank structure 03, and the protection of sheet pile 311 butt joint structure 03 is favorable to improving the stability that bank joint 1 installed, thereby improves the reliability of bank joint 1 and immersed tube 2 butt joint department. In addition, the degree of depth that sheet pile 311 inserts in the soil is generally less than foundation pile 312 and inserts the soil in degree of depth, foundation pile 312's installation stability is better, it is better to the supporting effect of cushion cap body 32, and shoreside joint 1 installs on shoreside structure 03, and the soil is comparatively tight reality in the relative aquatic soil of the soil on the bank, the immersed tube 2 in the relative aquatic of stability of shoreside joint 1 installation is higher, consequently, set up foundation pile 312 in the one side that is close to immersed tube 2, set up sheet pile 311 in the one side that is close to shoreside joint 1, in order to improve this immersed tube tunnel shoreside joint mounting structure's overall stability. In addition, with sheet pile 311 setting in the one side that foundation pile 312 is close to the bank for rivers silt etc. that flow to the bank receive earlier the blocking of foundation pile 312 and meet with sheet pile 311 again, foundation pile 312 can share partly the task that blocks rivers and silt etc. and flow to the bank, is favorable to reducing sheet pile 311's loss, extension sheet pile 311's installation stability and life. On this basis, it is preferable that in some embodiments, the number of foundation piles 312 is plural, and plural foundation piles 312 are arranged in a shoreside arrangement. With such a structure, the supporting structure 31 has a better supporting effect on the bearing platform body 32. On this basis, in some embodiments, a plurality of foundation piles 312 are uniformly arranged in the direction of the shoreside extension.
The shoreside extending direction refers to an extending direction of the bank 02 on the side closer to the water area 01.
In some embodiments, referring to fig. 2, 3 and 4, the platform body 32 includes a shoreside bearing area 321 and a sink bearing area 322. The shoreside bearing area 321 is used for bearing the shoreside connector 1, the immersed tube bearing area 322 is used for bearing the end of the butt joint of the immersed tube 2, the immersed tube bearing area 322 is lower than the shoreside bearing area 321, a bearing protrusion 3221 extending upwards is arranged in the immersed tube bearing area 322, and the upper surface of the bearing protrusion 3221 is flush with the shoreside bearing area 321. In this structure, the bearing protrusions 3221 are used for bearing the immersed tube 2, so that the contact area between the immersed tube 2 and the bearing platform body 32 is small, the immersed tube 2 can move on the bearing platform body 32 conveniently, the butt joint operation between the immersed tube 2 and the shore-side joint 1 is facilitated, and the butt joint construction precision is improved. Specifically, the shore connection 1 is fixed on the bank 02, and the sinking pipe 2 is first sunk on the bearing protrusion 3221 and then moved in a direction close to the shore connection 1 to be butted against the shore connection 1. On the basis, in some embodiments, a construction avoidance gap 323 is formed between the bearing protrusion 3221 and the shore bearing area 321. When immersed tube 2 and shoreside joint 1 contact, need the staff to operate joint department in order to carry out sealing connection to it, the clearance 323 is dodged in the construction has reserved certain operating space for the staff, and the staff of being convenient for operates. It should be noted that, the construction avoiding gap 323 between the bearing protrusion 3221 and the shore bearing area 321 means that, along the extending direction of the sinking pipe 2, a gap exists between the side of the bearing protrusion 3221 close to the shore bearing area 32 and the shore bearing area 321.
In addition, the load-bearing protrusions 3221 also facilitate the force of the sinking tube 2. If the immersed tube 2 is in large-area contact with the bearing platform structure 3, the contact force between the immersed tube 2 and the bearing platform structure 3 is difficult to control, the stress at the edge position of the contact area between the immersed tube 2 and the bearing platform structure 3 is large, which may damage the immersed tube 2, the bearing protrusion 3221 is arranged to make the contact area between the immersed tube 2 and the bearing platform structure 3 smaller, the stress at the contact area between the immersed tube 2 and the bearing protrusion 3221 is more uniform, which is favorable for improving the stress condition of the immersed tube 2. Further, referring to fig. 1, the immersed tube tunnel shore-side joint installation structure further includes a stopper 33, the stopper 33 is disposed at an end of the bearing platform structure 3 along a vertical direction of an extending direction of the immersed tube 2, the stopper 33 extends along an up-down direction, an upper surface of the stopper 33 is higher than an upper surface of the bearing platform body 32, and the stopper 33 is located at one side of the immersed tube 2 along the vertical direction of the extending direction of the immersed tube 2. Structural style like this, the lateral displacement of immersed tube 2 can be restricted to dog 33, is favorable to reducing the horizontal required precision of immersed tube 2 heavy in-process, and horizontal position control efficiency when improving immersed tube 2 and sinking also is favorable to preventing that immersed tube 2 from taking place lateral displacement after sinking. Preferably, in some embodiments, the number of the stoppers 33 is two, and two stoppers 33 are respectively disposed at both ends of the platform structure 3 in a direction perpendicular to the extending direction of the immersed tube 2, and the immersed tube 2 is located between the two stoppers 33. On this basis, in some embodiments, the upper end of the inner side of the stopper 33 is inclined away from the other stopper 33. Structural style like this, the relative position of the upper end of two dog 33 is great, is favorable to further reducing the degree of difficulty that immersed tube 2 sinks control, horizontal automatic butt joint precision when improving immersed tube 2 and sinks. Note that the inner side of the stopper 33 is a side of the stopper 33 between the two stoppers 33.
The embodiment of the present application further provides a construction method, please refer to fig. 3, fig. 4, and fig. 8, for constructing the installation structure of the pipe caisson on the shoreside joint 1 provided in the embodiment of the present application, the method includes:
and 102, butting the immersed tube 2 and the shore connection 1 on a bearing platform structure 3.
Like this, carry out the butt joint of immersed tube 2 and bank side joint 1 on cushion cap structure 3, immersed tube 2 receives cushion cap structure 3's firm supporting role, can carry out comparatively stable removal on cushion cap structure 3, and the staff's of being convenient for operation is favorable to improving the butt joint precision.
In some embodiments, referring to fig. 3, fig. 4 and fig. 9, the bearing platform structure 3 includes a shoreside bearing area 321 and a immersed tube bearing area 322, the shoreside bearing area 321 is used for bearing the shoreside joint 1, the immersed tube bearing area 322 is disposed corresponding to the immersed tube 2, and the immersed tube bearing area 322 is lower than the shoreside bearing area 321; an upward bearing bulge 3221 is arranged in the immersed tube bearing area 322, the upper surface of the bearing bulge 3221 is flush with the shoreside bearing area 321, and the upper surface of the bearing bulge 3221 is used for bearing an immersed tube 2; the method comprises the following steps:
and step 203, hermetically connecting and fixing the immersed tube 2 and the shore connection 1.
Thus, the arrangement of the bearing protrusions 3221 facilitates the movement of the immersed tube 2 on the bearing platform body 32, is beneficial to the butt joint operation of the immersed tube 2 and the shore joint 1, and improves the butt joint construction precision.
Further, referring to fig. 3, 4 and 10, in some embodiments, the platform structure 3 includes a support structure 31 and a platform body 32, the support structure 31 is used for standing in the soil of the water bottom 011; the cap body 32 is fixed on top of the support structure 31 to bear the end of the butt joint of the immersed tube 2 and the shoreside joint 1, and the step 101 comprises the following steps:
wherein the cushion cap body 32 is located in the foundation pit.
Like this, application cofferdam dry process is under construction cushion cap structure 3 in the foundation ditch, for directly under water construction cushion cap structure 3, is favorable to reducing the construction degree of difficulty, and can make cushion cap structure 3's quality higher, the precision is higher. The foundation ditch supports, and excavation supporting promptly is one kind and sets up the fender structure along foundation ditch inner wall for consolidate foundation ditch inner wall and foundation ditch all ring edge borders, can protect cushion cap structure 3, for the construction of cushion cap structure 3 provides reliable firm space, guarantee cushion cap structure 3's construction safety, also be favorable to the safety of foundation ditch all ring edge borders. The common foundation pit supports mainly comprise a pile row support, an underground continuous wall support, a cement retaining wall, a soil nailing wall, a reverse arch wall, an undisturbed soil slope, a reinforced concrete pile row and the like.
In addition, the supporting structure 31 is constructed on the shore, so that the construction is convenient, and the supporting structure 31 is stable. It should be explained that, in the process of excavating the foundation pit or after the foundation pit is excavated, the excess part of the supporting structure 31 needs to be shoveled off, and then the bearing platform body 32 is constructed at the upper end of the supporting structure 31.
Further, in some embodiments, the bearing platform body 32 includes a shoreside bearing area 321 and a immersed tube bearing area 322, the shoreside bearing area 321 is used for bearing the shoreside joint 1, and the shoreside bearing area 321 is cast and molded together with the shoreside joint 1 on the basis that the immersed tube bearing area 322 is arranged corresponding to the end of the butt joint of the immersed tube 2. Like this, shoreside bears regional 321 and shoreside joint 1 and is under construction simultaneously, has better wholeness, is favorable to improving the butt joint precision of immersed tube 2 and shoreside joint 1 and the reliability of butt joint department. On this basis, in some embodiments, the shore structure 03, such as the flood bank 031, can also be constructed simultaneously with the shore connection 1.
Further, in some embodiments, before docking the immersed tube 2 with the shore-side joint 1 on the cap structure 3, and after constructing the cap body 32 on the support structure 31, the construction method further comprises: backfilling and covering the foundation pit; removing at least the cofferdam structure 07 at the pre-installation position part of the immersed tube 2; excavating a base groove 04 at the pre-installation position of the immersed tube 2; after the immersed tube 2 and the shore connection 1 are butted on the bearing platform structure 3, the construction method further comprises the following steps: the base trench 04 is backfilled. That is, referring to fig. 3, 4 and 11, the construction method in this embodiment includes the following steps:
in step 409, the base trench 04 is backfilled.
Referring to fig. 4, after the foundation trench 04 is backfilled, a backfill covering layer 06 of the immersed tube is formed above the immersed tube 2. With the structure, the foundation trench 04 and the immersed tube backfill covering layer 06 can protect the immersed tube 2 and can prevent water from entering the immersed tube 2.
In some embodiments, referring to fig. 5 and 6, the cofferdam structure 07 is a steel sheet pile lattice cofferdam. Specifically, the steel sheet pile lattice cofferdam comprises cofferdam lattices 071 and lattice supports 072, and the number of cofferdam lattices 071 and lattice supports 072 is a plurality, and the cofferdam lattices 071 and the lattice supports 072 are arranged in a one-to-one correspondence manner. The plurality of cofferdam lattices 071 and the bank are enclosed to form a waterless construction area, and the cofferdam lattices 071 are enclosed by a plurality of steel sheet piles. Cell supports 072 extend from cofferdam cells 071 to the bank edge to secure the corresponding cofferdam cells 071 to the bank 02. Preferably, in some embodiments, lattice support 072 is made of a concrete material.
Based on the cofferdam structure 07 being a steel sheet pile lattice cofferdam, in some embodiments, please refer to fig. 7, step 406 is: and (3) dismantling a cofferdam lattice 071 and a lattice support 072 at the position corresponding to the immersed tube 2 on the cofferdam structure 07. Therefore, the steel sheet pile lattice cofferdam is applied for construction, in the process of dismantling the cofferdam structure 07, only a part of cofferdam lattices 071 and lattice supports 072 need to be dismantled, the whole cofferdam structure 07 does not need to be dismantled, the occupied space of the immersed tube 2 is relatively small, the number of the cofferdam lattices 071 needing to be dismantled is relatively small, and therefore the construction amount is small. In addition, only part of the cofferdam lattices 071 are removed, so that the cofferdam lattices 071 which are not removed can protect the bank 02 in the service process of the immersed tube tunnel shore connection 1 installation structure, and the reliability of the immersed tube tunnel shore connection 1 installation structure can be enhanced.
In some embodiments, between steps 404 and 405, the construction method further comprises: a retaining wall 08 is constructed between the cofferdam structure 07 and the bank, and the retaining wall 08 extends along the bank, and the retaining wall 08 is located on one side of the bearing platform structure 3 along the extending direction of the bank. The retaining wall 08 is constructed between the cofferdam structure 07 and the bank, so that the backfilling of the earth covering in the area between the bank and the retaining wall 08 is facilitated, and the bank backfilling covering layer 09 is formed by backfilling and earth covering between the bank and the retaining wall 08. Preferably, in some embodiments, the number of the retaining walls 08 is two, and the two retaining walls 08 are respectively located on two opposite sides of the platform structure 3 along the extending direction of the shore.
Further, in some embodiments, between step 408 and step 409, the construction method further comprises filling a gap between the immersed tube 2 and the platform structure 3, and/or a gap between the upper part of the foundation trench 04 and the immersed tube 2, so as to complete the immersed tube foundation 05. That is, referring to fig. 3, 4 and 12, the construction method in this embodiment includes the following steps:
509, filling a gap between the immersed tube 2 and the bearing platform structure 3 and/or a gap between the upper part of the base groove 04 and the immersed tube 2 to complete an immersed tube foundation 05;
In this way, the sinking tube foundation 05 can support the sinking tube 2. The soil quality of the water area bottom 011 is soft, and the immersed tube 2 is supported by the immersed tube foundation 05, so that the stability of the installation of the immersed tube 2 in the foundation trench 04 is improved.
It should be noted that, the steps in the construction method provided in the embodiments of the present application may be changed in order without conflict.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (14)
1. The utility model provides a immersed tube tunnel shoreside connector mounting structure which characterized in that includes:
a shoreside joint;
the immersed tube is arranged at the bottom of a water area and close to the shoreside connector, and the shoreside connector and the immersed tube are butted to form a tunnel;
and the bearing platform structure is arranged below the end part of the butt joint of the immersed tube and the shoreside joint and is used for bearing the end part of the butt joint of the immersed tube and the shoreside joint.
2. The immersed tunnel shoreside joint installation structure of claim 1, wherein the bearing platform structure comprises:
a support structure for standing in the soil at the bottom of the body of water;
and the bearing platform body is supported at the top of the supporting structure so as to bear the end part of the butt joint of the immersed tube and the shore joint.
3. The immersed tube tunnel shoreside joint mounting structure of claim 2, wherein the cap body comprises:
the shore bearing area is used for bearing the shore joint;
the immersed tube bearing area is used for bearing the end part of the butt joint of the immersed tubes, the immersed tube bearing area is lower than the shoreside bearing area, bearing bulges extending upwards are arranged in the immersed tube bearing area, and the upper surfaces of the bearing bulges are flush with the shoreside bearing area.
4. The immersed tube tunnel shore connection mounting structure of claim 3, wherein there is a construction avoidance gap between the bearing protrusion and the shore bearing area.
5. The pipe sinking tunnel shoreside joint installation structure of claim 2, wherein the support structure comprises a sheet pile and a foundation pile, the sheet pile extends along the shoreside, the sheet pile and the foundation pile respectively support two ends of the bearing platform body along the direction perpendicular to the shoreside extension direction, and the sheet pile is located on the side of the foundation pile close to the shoreside.
6. The offshore pipe fitting installation structure of any one of claims 1 to 5, further comprising a stopper disposed at an end of the bearing platform structure in a direction perpendicular to an extending direction of the immersed pipe, the stopper extending in an up-down direction, an upper surface of the stopper being higher than an upper surface of the bearing platform body, the stopper pipe being located at one side of the immersed pipe in the direction perpendicular to the extending direction of the immersed pipe.
7. The offshore joint installation structure of claim 6, wherein the number of the stoppers is two, and the two stoppers are respectively disposed at two ends of the bearing platform structure in a direction perpendicular to the extension direction of the immersed tube, and the immersed tube is located between the two stoppers.
8. The sinking tunnel shoreside joint mounting structure of claim 7, wherein an upper end of an inner side of the stopper is inclined away from the other stopper.
9. A construction method for constructing the offshore joint installation structure of the immersed tunnel according to any one of claims 1 to 8, wherein the construction method comprises:
constructing the bearing platform structure;
and butting the immersed tube and the shoreside joint on the bearing platform structure.
10. The construction method according to claim 9, wherein the bearing platform structure comprises a shoreside bearing area and a immersed tube bearing area, the shoreside bearing area is used for bearing the shoreside joint, the immersed tube bearing area is arranged corresponding to the immersed tube, and the immersed tube bearing area is lower than the shoreside bearing area; an upward bearing bulge is arranged in the immersed tube bearing area, the upper surface of the bearing bulge is flush with the shoreside bearing area, and the upper surface of the bearing bulge is used for bearing the immersed tube; the butting the immersed tube and the shoreside joint on the bearing platform structure comprises:
overlapping the end part of the immersed tube on the bearing bulge;
pushing the end of the immersed tube towards the shoreside joint until the immersed tube contacts the shoreside joint end;
and the immersed tube and the shore joint are fixedly connected in a sealing way.
11. The construction method according to claim 9, wherein the cap structure comprises a support structure for standing in soil of the bottom of the body of water and a cap body; the cushion cap body is fixed bearing structure's top to bear the weight of the tip of the butt joint department of immersed tube with the shoreside connects, the construction the cushion cap structure includes:
constructing the support structure on shore;
constructing a cofferdam structure on the bank, isolating a waterless construction area, and excavating a foundation pit on the bank;
constructing a foundation pit support in the foundation pit;
constructing the bearing platform body on the supporting structure;
and the bearing platform body is positioned in the foundation pit.
12. The construction method according to claim 11, wherein the bearing platform body comprises a shoreside bearing area and a immersed tube bearing area, the shoreside bearing area is used for bearing the shoreside joint, the immersed tube bearing area is arranged corresponding to the end part of the butt joint of the immersed tube, and the shoreside bearing area and the shoreside joint are cast and molded together.
13. The construction method according to claim 11, wherein before the butting the immersed tube with the shoreside joint on the cap structure and after the construction of the cap body on the support structure, the construction method further comprises:
backfilling and covering the foundation pit;
removing at least part of the cofferdam structure at the pre-installation position of the immersed tube;
excavating a foundation trench at the pre-installation position of the immersed tube;
after the butting the immersed tube and the shore connection on the bearing platform structure, the construction method further comprises the following steps:
and backfilling the basic groove.
14. The construction method according to claim 13, wherein the construction method further comprises, after the butting the immersed tube and the shoreside joint on the cap structure before the backfilling of the foundation trench, the step of:
and filling a gap between the immersed tube and the bearing platform and/or a gap between the upper part of the foundation trench and the immersed tube to finish the immersed tube foundation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210629576.9A CN115198798B (en) | 2022-06-01 | 2022-06-01 | Immersed tube tunnel bank joint installation structure and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210629576.9A CN115198798B (en) | 2022-06-01 | 2022-06-01 | Immersed tube tunnel bank joint installation structure and construction method |
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| CN115198798A true CN115198798A (en) | 2022-10-18 |
| CN115198798B CN115198798B (en) | 2024-03-15 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB865567A (en) * | 1958-01-28 | 1961-04-19 | Dennis Percy Bertlin | Improvements in or relating to the construction of tunnels |
| CN1804375A (en) * | 2005-01-14 | 2006-07-19 | 上海隧道工程股份有限公司 | Immersed tube tunnel final joints structure form and use method thereof |
| CN103741725A (en) * | 2014-01-17 | 2014-04-23 | 天津市市政工程设计研究院 | Immersed tunnel final joint and shoreside dry-work construction method thereof |
| CN108239998A (en) * | 2017-08-10 | 2018-07-03 | 北京九州动脉隧道技术有限公司 | A kind of underwater bridge structure and its construction method |
| CN113585345A (en) * | 2021-08-13 | 2021-11-02 | 中南大学 | Offshore inland river junction area immersed tunnel construction process |
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2022
- 2022-06-01 CN CN202210629576.9A patent/CN115198798B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB865567A (en) * | 1958-01-28 | 1961-04-19 | Dennis Percy Bertlin | Improvements in or relating to the construction of tunnels |
| CN1804375A (en) * | 2005-01-14 | 2006-07-19 | 上海隧道工程股份有限公司 | Immersed tube tunnel final joints structure form and use method thereof |
| CN103741725A (en) * | 2014-01-17 | 2014-04-23 | 天津市市政工程设计研究院 | Immersed tunnel final joint and shoreside dry-work construction method thereof |
| CN108239998A (en) * | 2017-08-10 | 2018-07-03 | 北京九州动脉隧道技术有限公司 | A kind of underwater bridge structure and its construction method |
| CN113585345A (en) * | 2021-08-13 | 2021-11-02 | 中南大学 | Offshore inland river junction area immersed tunnel construction process |
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| CN115198798B (en) | 2024-03-15 |
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