CN119041477A - Subway entrance and exit main body and enclosure fully-assembled structure and construction method thereof - Google Patents
Subway entrance and exit main body and enclosure fully-assembled structure and construction method thereof Download PDFInfo
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Abstract
本发明是一种地铁出入口主体和围护全装配式结构及其施工方法，全装配式结构包括左右两侧对称设置的装配式围护结构，每侧的装配式围护结构顶部均施工有冠梁、挡土墙、截水沟，左右两侧的装配式围护结构之间从上到下安装有出入口顶板结构、出入口底板结构；每侧的装配式围护结构均由若干个预制地连墙单体装配而成，预制地连墙单体之间通过后浇筑的接头桩连接，相邻的两个预制地连墙单体在接头桩两侧的连接缝内均设有第一止水条。出入口顶板结构包括出入口预制顶板、现浇混凝土顶板；出入口底板结构包括出入口预制底板、现浇混凝土底板。本发明中的地铁出入口采用全装配式结构，节省了工程造价，加快了施工进度，增强了结构整体性和防水性能。
The present invention is a fully assembled structure of a subway entrance and exit body and enclosure and a construction method thereof. The fully assembled structure includes assembled enclosure structures symmetrically arranged on the left and right sides. The top of the assembled enclosure structure on each side is constructed with a crown beam, a retaining wall, and a ditches. The entrance and exit top plate structure and the entrance and exit bottom plate structure are installed from top to bottom between the assembled enclosure structures on the left and right sides; the assembled enclosure structure on each side is assembled from a number of prefabricated ground-connected wall monomers, and the prefabricated ground-connected wall monomers are connected by post-cast joint piles, and two adjacent prefabricated ground-connected wall monomers are provided with a first water stop strip in the connecting seam on both sides of the joint pile. The entrance and exit top plate structure includes an entrance and exit prefabricated top plate and a cast-in-place concrete top plate; the entrance and exit bottom plate structure includes an entrance and exit prefabricated bottom plate and a cast-in-place concrete bottom plate. The subway entrance and exit in the present invention adopts a fully assembled structure, which saves engineering costs, speeds up construction progress, and enhances structural integrity and waterproof performance.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a subway entrance main body and enclosure fully-assembled structure and a construction method thereof.
Background
Track traffic construction occupies very big proportion in urban construction, and track traffic assembly type technical research helps improving the efficiency of construction, protects urban ecology. At present, the track traffic assembly type technology is mainly focused on the construction of subway stations and section tunnels, less researches are carried out on assembled subway entrances and exits, only the foundation pit support structure assembly type or the entrance main body structure assembly type is involved, and the support structure and the main body structure are assembled in a small number.
The Chinese patent publication No. CN115853536B discloses an assembled subway entrance and exit channel structure and a component connecting node, the entrance and exit channel structure comprises a plurality of annular component sections, the annular component sections comprise prefabricated components, cast-in-situ plugging blocks and waterproof battens, the construction period can be shortened, the engineering quality is improved, the operation intensity is reduced, the construction mode of a foundation pit support structure is not comprehensively considered, cast-in-situ diaphragm walls or construction method piles are generally adopted in soft soil areas, more internal supports are needed, the hoisting operation of main components is influenced, and the material waste and the construction period are prolonged.
The Chinese patent application with publication number of CN115387323A discloses an assembled underground diaphragm wall connecting node and a construction method thereof, wherein the connecting node is divided into an A-type node and a K-type node, the integrity of an assembled structure can be improved, but the node still has some defects, and the node has poor cracking resistance and possibly affects the waterproof performance of an enclosure structure.
Therefore, the problem of connection between subway entrance and exit enclosures and the fully assembled nodes of the main body structure is still a construction difficulty.
Disclosure of Invention
The invention aims to solve the problem of connection of the nodes of the assembled subway entrance and exit, and provides a subway entrance and exit main body and enclosure fully assembled structure and a construction method thereof, which can realize the integrated assembly construction of the main body structure and the foundation pit enclosure structure, so that the structure has good overall waterproof performance and economy.
The invention adopts the following technical scheme to realize the aim:
The utility model provides a subway access & exit main part and enclosure fully assembled structure, includes the assembled envelope that left and right sides set up symmetrically, and assembled envelope top of each side is all under construction has the hat roof beam, and the outside construction of hat roof beam top has the retaining wall, and the retaining wall outside construction has the intercepting ditch, installs access & exit roof structure, access & exit bottom plate structure from top to bottom between the assembled envelope of left and right sides;
The assembled enclosure structure of each side is formed by sequentially assembling a plurality of prefabricated underground continuous wall monomers in the horizontal direction, the middle positions of the connecting end surfaces of the two sides of the prefabricated underground continuous wall monomers are respectively provided with a semicircular groove which penetrates up and down, joint piles are poured in the semicircular grooves corresponding to the two adjacent prefabricated underground continuous wall monomers, first water stop strips are respectively arranged in the connecting joints of the two adjacent prefabricated underground continuous wall monomers at the two sides of the joint piles, steel corbel steel plates are pre-buried at the bottoms of the top plate structures of the corresponding entrances and exits on the side walls of the prefabricated underground continuous wall monomers, and steel corbels are arranged on the side walls of the steel corbel steel plates;
The entrance roof structure comprises an entrance prefabricated roof which is erected on the steel corbels, a second water stop strip is arranged between the entrance prefabricated roof and the assembled enclosure structure, and a cast-in-place concrete roof is arranged at the top of the entrance prefabricated roof;
The passageway bottom plate structure is equipped with the third sealing strip including setting up the prefabricated bottom plate of passageway on plain concrete bed course, passageway prefabricated bottom plate and assembled envelope between, passageway prefabricated bottom plate top is equipped with cast in situ concrete bottom plate.
The wall side grouting pipes comprise vertical pipes and horizontal pipes, the vertical pipes are arranged from the tops of the prefabricated wall connecting monomers to the inside, the lengths of the vertical pipes are half of the heights of the prefabricated wall connecting monomers, the horizontal pipes are communicated between the bottoms of the vertical pipes and the side surfaces of the prefabricated wall connecting monomers, an inclinometer is arranged between the two wall bottom grouting pipes, and the inclinometer is arranged in the inclinometer.
The inside steel reinforcement cage that is equipped with of joint stake, steel reinforcement cage include a plurality of joint stake main muscle of circumference equipartition, and the peripheral welding of joint stake main muscle has spiral stirrup.
The prefabricated underground continuous wall single side wall is provided with a first embedded anchor bar and a first bar connector in an embedded mode at the position corresponding to the cast-in-place concrete top plate, and the prefabricated underground continuous wall single side wall is provided with a second embedded anchor bar and a second bar connector in an embedded mode at the position corresponding to the cast-in-place concrete bottom plate.
The prefabricated underground continuous wall single side wall is pre-buried with steel supporting steel plates and pull-up connecting pieces between the entrance top plate structure and the entrance bottom plate structure, and the pull-up connecting pieces are located above the steel supporting steel plates.
A support pad is arranged between the steel corbel and the prefabricated top plate of the entrance.
The prefabricated roof top of access & exit is pre-buried to have first stirrup, and the welding has first main muscle between the first stirrup of same row, and first stirrup, first main muscle set up in cast in situ concrete roof, and first main muscle is connected with first pre-buried anchor bar through first reinforcing bar connector.
The prefabricated bottom plate top of access & exit is pre-buried to have the second stirrup, and the welding has the second main muscle between the second stirrup of same row, and second stirrup, second main muscle set up in cast in situ concrete bottom plate, and the second main muscle passes through the second reinforcing bar connector and is connected with the pre-buried anchor bar of second.
The construction method of the subway entrance main body and enclosure fully-assembled structure comprises the following specific steps:
S1, site hardening, assembling an assembled enclosure structure by adopting prefabricated diaphragm wall monomers, wherein the concrete impermeability grade of the prefabricated diaphragm wall monomers is not lower than P8, the prefabrication dimensional error of the single prefabricated diaphragm wall monomers is less than 5mm, the installation error of an embedded part is less than 1mm, the prefabricated diaphragm wall monomers are excavated into grooves by using an underwater grooving machine, mud retaining walls are adopted, the prefabricated diaphragm wall monomers are transported to a construction site in advance, the prefabricated diaphragm wall monomers are sequentially hoisted and inserted by using hoisting equipment, a reinforcement cage is hoisted, after the bottom is cleared, a joint pile is poured underwater, the joint pile concrete adopts self-compaction concrete with the impermeability grade not lower than P8, in order to reduce the settlement of the prefabricated diaphragm wall monomers, the bottom grouting is carried out through two wall bottom grouting pipes, the lower ends of the wall bottom grouting pipes extend out by 0.3m from the bottoms of the prefabricated diaphragm wall monomers, the grouting is stopped after the grouting of the wall bottom is completed, and construction of a crown beam, a retaining wall, a dewatering well and a ditch is cut off;
S2, beginning to reduce water in the day before the foundation pit is excavated, reducing the water to 1m below the excavation surface of the foundation pit, paying attention to water level change at any time according to the water level change, and making an emergency plan to prevent accidents, wherein the foundation pit is excavated to 600mm below the first support, and the first support is erected between two crown beams;
S3, excavating a foundation pit to 600mm below a second support, erecting the second support between the assembled enclosure structures on two sides, connecting the second support with a prefabricated underground continuous wall monomer through a steel support steel plate and a pull-up connecting piece, and adopting a pull-up lower support to ensure firm connection of the second support;
s4, excavating the foundation pit to the designed pit bottom elevation, constructing a plain concrete cushion layer, a waterproof layer and a protective layer of the plain concrete cushion layer, and reducing exposure time of the foundation pit;
S5, hoisting an entrance prefabricated bottom plate on the plain concrete cushion layer, arranging a third water stop strip between the entrance prefabricated bottom plate and the prefabricated ground continuous wall monomer, connecting a second main reinforcement with a second embedded anchor bar through a second bar connector, casting a cast-in-place concrete bottom plate, adopting self-compacting concrete with an impervious grade not lower than P8 for concrete of the cast-in-place concrete bottom plate, and dismantling a second support after the cast-in-place concrete bottom plate reaches strength;
S6, welding steel corbels on steel plate of the steel corbels, placing supporting pads, hoisting prefabricated roof plates of the access and exit, arranging second water stop bars between the prefabricated roof plates of the access and the prefabricated underground continuous wall, connecting the first main bars with first embedded anchor bars through first bar connectors, pouring cast-in-place concrete roof plates, adopting self-compacting concrete with impervious grade not lower than P8 for cast-in-place concrete roof plates, and dismantling the first support after the cast-in-place concrete roof plates reach strength;
And S7, paving a waterproof layer and a protective layer on the top of the prefabricated roof of the access opening, backfilling and earthing after the protective layer reaches the strength, and stopping dewatering after backfilling is completed.
The subway entrance and exit structure has the beneficial effects that the subway entrance and exit structure adopts a fully assembled structure, so that the engineering cost is saved, the construction progress is quickened, the prefabricated underground continuous wall monomers are connected by adopting a rear filling joint pile, the structure is externally waterproof by adopting a plurality of water stopping modes such as water stopping strips, self-compacting concrete and the like, and the structural integrity and the waterproof performance are enhanced.
Drawings
FIG. 1 is a schematic structural view of a subway doorway main body and a surrounding fully assembled structure;
FIG. 2 is a schematic diagram of the structure of prefabricated wall units according to the present invention;
FIG. 3 is a schematic view of the connection of two adjacent prefabricated wall units according to the present invention;
FIG. 4 is a schematic diagram showing the connection of prefabricated wall units to the top plate structure of the doorway and the bottom plate structure of the doorway;
FIG. 5 is a schematic view of a prefabricated roof of an doorway in the present invention;
in the figure, a 1-assembled enclosure structure, a 2-crown beam, a 3-retaining wall, a 4-intercepting ditch, a 5-entrance roof structure, a 6-entrance bottom plate structure, a 7-plain concrete cushion layer, an 8-support cushion, a 9-first support and a 10-second support are shown;
11-prefabricated ground connecting wall monomers, 12-semicircular grooves, 13-connector piles, 14-first water stop bars, 15-steel bracket steel plates, 16-steel brackets, 17-wall bottom grouting pipes, 18-wall side grouting pipes, 19-inclinometer pipes, 110-first embedded anchoring bars, 111-first steel bar connectors, 112-second embedded anchoring bars, 113-second steel bar connectors, 114-steel support steel plates and 115-pull-up connectors;
the system comprises a prefabricated top plate at a 51-entrance, a 52-second water stop bar and a 53-cast-in-place concrete top plate;
61-an entrance prefabricated bottom plate, 62-a third water stop bar and 63-a cast-in-place concrete bottom plate;
131-joint pile main reinforcement, 132-spiral stirrups;
511-first stirrup, 512-first main stirrup;
611-second stirrup, 612-second main stirrup;
The embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the illustrated embodiments are provided for illustration only and are not intended to limit the scope of the present invention. The invention is more particularly described by way of example in the following paragraphs with reference to the drawings. The advantages and features of the present invention will become more apparent from the following description. It should be noted that the drawings are in a very simplified form and are all to a non-precise scale, merely for convenience and clarity in aiding in the description of embodiments of the invention.
It will be understood that when an element is referred to as being "fixed to" another element, it can be directly on the other element or intervening elements may also be present. When a component is considered to be "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When an element is referred to as being "disposed on" another element, it can be directly on the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
The invention is further illustrated by the following examples in conjunction with the accompanying drawings:
The utility model provides a subway access & exit main part and enclosure fully assembled formula structure, as shown in fig. 1, including the assembled envelope 1 that left and right sides symmetry set up, all be under construction in assembled envelope 1 top of every side has a crown roof beam 2, and the outside construction of crown roof beam 2 top has retaining wall 3, and the outside construction of retaining wall 3 has water interception ditch 4, installs access & exit roof structure 5, access & exit bottom plate structure 6 from the top down between assembled envelope 1 of left and right sides.
The assembled enclosure structure 1 on each side is formed by sequentially assembling a plurality of prefabricated underground continuous wall monomers 11 in the horizontal direction, as shown in fig. 2, semicircular grooves 12 penetrating up and down are formed in the middle positions of the connecting end faces on two sides of the prefabricated underground continuous wall monomers 11, wall bottom grouting pipes 17 are pre-buried in each prefabricated underground continuous wall monomer 11 in a bilateral symmetry mode, wall side grouting pipes 18 penetrate out of the bottoms of the prefabricated underground continuous wall monomers 11, the middle positions of the side walls of each prefabricated underground continuous wall monomer 11 are pre-buried, each wall side grouting pipe 18 comprises a vertical pipe and a horizontal pipe, the vertical pipe is arranged from the top of each prefabricated underground continuous wall monomer 11 to the inside and is half of the height of each prefabricated underground continuous wall monomer 11, the horizontal pipe is arranged between the bottoms of the vertical pipes and the side faces of the prefabricated underground continuous wall monomers 11 in a communicating mode, an inclinometer 19 is arranged between the two wall bottom grouting pipes 17, and an inclinometer is arranged in each inclinometer 19.
The joint pile 13 is poured in the semicircular groove 12 corresponding to the two adjacent prefabricated underground continuous wall monomers 11, as shown in fig. 3, the first water stop strips 14 are arranged in the connecting joints of the two sides of the joint pile 13 of the two adjacent prefabricated underground continuous wall monomers 11, a reinforcement cage is arranged in the joint pile 13, the reinforcement cage comprises a plurality of joint pile main ribs 131 uniformly distributed on the circumference, and spiral stirrups 132 are welded on the periphery of the joint pile main ribs 131.
The side wall of the prefabricated underground diaphragm wall unit 11 is pre-embedded with a steel corbel steel plate 15 corresponding to the bottom of the entrance roof structure 5, and the side wall of the steel corbel steel plate 15 is provided with a steel corbel 16;
as shown in fig. 4, the entrance roof structure 5 comprises an entrance prefabricated roof 51 erected on a steel bracket 16, a second water stop strip 52 is arranged between the entrance prefabricated roof 51 and the assembled enclosure structure 1, and a cast-in-place concrete roof 53 is arranged at the top of the entrance prefabricated roof 51.
As shown in fig. 4, the access floor structure 6 comprises an access prefabricated floor 61 erected on the plain concrete cushion 7, a third water stop strip 62 is arranged between the access prefabricated floor 61 and the assembled enclosure 1, and a cast-in-place concrete floor 63 is arranged at the top of the access prefabricated floor 61.
As shown in fig. 4, a first embedded anchor bar 110 and a first bar connector 111 are embedded in the side wall of the prefabricated underground continuous wall unit 11 corresponding to the cast-in-place concrete top plate 53, and a second embedded anchor bar 112 and a second bar connector 113 are embedded in the side wall of the prefabricated underground continuous wall unit 11 corresponding to the cast-in-place concrete bottom plate 63.
As shown in fig. 4, steel support steel plates 114 and pull-up connectors 115 are embedded between the entrance roof structure 5 and the entrance floor structure 6 on the side walls of the prefabricated underground diaphragm 11, and the pull-up connectors 115 are located above the steel support steel plates 114.
As shown in fig. 4, a support pad 8 is provided between the steel corbel 16 and the entrance prefabricated roof 51.
As shown in fig. 4 and 5, a first stirrup 511 is pre-embedded at the top of the prefabricated top plate 51 of the doorway, a first main reinforcement 512 is welded between the first stirrups 511 in the same row, the first stirrups 511 and the first main reinforcement 512 are arranged in the cast-in-place concrete top plate 53, and the first main reinforcement 512 is connected with the first pre-embedded anchor reinforcement 110 through a first reinforcement connector 111.
As shown in fig. 4, a second stirrup 611 is pre-embedded at the top of the prefabricated entrance bottom plate 61, a second main stirrup 612 is welded between the second stirrups 611 in the same row, the second stirrup 611 and the second main stirrup 612 are arranged in the cast-in-place concrete bottom plate 63, and the second main stirrup 612 is connected with the second pre-embedded anchor steel bar 112 through a second steel bar connector 113.
As shown in fig. 5, a plurality of reinforcing inner ribs are embedded in the prefabricated entrance top plate 51 and the prefabricated entrance bottom plate 61.
The construction method of the subway entrance main body and enclosure fully-assembled structure comprises the following specific steps:
S1, site hardening, assembling an assembled enclosure structure 1 by adopting prefabricated diaphragm wall monomers 11, wherein the concrete impermeability grade of the prefabricated diaphragm wall monomers 11 is not lower than P8, the prefabrication dimensional error of the single prefabricated diaphragm wall monomers 11 is less than 5mm, the installation error of embedded parts is less than 1mm, the prefabricated diaphragm wall monomers 11 are excavated into grooves by using an underwater grooving machine, a slurry retaining wall is adopted, the prefabricated diaphragm wall monomers 11 are transported to a construction site in advance, the prefabricated diaphragm wall monomers 11 are sequentially hoisted and inserted by adopting hoisting equipment, then a reinforcement cage is hoisted, after the bottom is cleared, a joint pile 13 is poured under water, the concrete of the joint pile 13 adopts self-compacting concrete with the impermeability grade not lower than P8, in order to reduce the settlement of the prefabricated diaphragm wall monomers 11, the lower ends of the wall bottom grouting pipes 17 extend out of 0.3m of the bottoms of the prefabricated diaphragm wall monomers 11, the grouting is stopped after the grouting quantity meets the design requirements, and then the wall side grouting is carried out;
The grouting device is connected to the wall grouting pipe 18 to ensure firm connection and good sealing performance, grouting is carried out, grouting pressure and flow are strictly controlled, and the change of surrounding environment is observed to prevent slurry from overflowing and leaking;
S2, dewatering is started 15 days before the foundation pit is excavated, the foundation pit is lowered to 1m below the excavation surface of the foundation pit, water level change is focused at any time according to the required dewatering, emergency plan is made, accidents are prevented, the foundation pit is excavated to 600mm below the first support 9, and the first support 9 is erected between the two crown beams 2;
S3, excavating a foundation pit to 600mm below the second support 10, erecting the second support 10 between the assembled building envelope 1 on two sides, connecting the second support 10 with the prefabricated ground continuous wall single body 11 through a steel support steel plate 114 and a pull-up connecting piece 115, and adopting a pull-up lower support to ensure firm connection of the second support 10;
s4, excavating the foundation pit to the designed pit bottom elevation, constructing a plain concrete cushion layer 7, a waterproof layer and a protective layer of the plain concrete cushion layer, and reducing the exposure time of the foundation pit;
S5, hoisting an entrance prefabricated bottom plate 61 on the plain concrete cushion layer 7, arranging a third water stop bar 62 between the entrance prefabricated bottom plate 61 and the prefabricated ground continuous wall monomer 11, connecting a second main bar 612 with a second embedded anchor bar 112 through a second bar connector 113, casting a cast-in-place concrete bottom plate 63, adopting self-compacting concrete with an impervious grade not lower than P8 for the concrete of the cast-in-place concrete bottom plate 63, and dismantling the second support 10 after the cast-in-place concrete bottom plate 63 reaches the strength;
S6, welding steel corbels 16 on a steel corbel steel plate 15, placing a support cushion 8, hoisting an entrance prefabricated roof 51, arranging a second water stop strip 52 between the entrance prefabricated roof 51 and the prefabricated underground continuous wall single body 11, connecting a first main reinforcement 512 with a first embedded anchor reinforcement 110 through a first reinforcement connector 111, pouring a cast-in-place concrete roof 53, adopting self-compacting concrete with an impervious grade not lower than P8 for the cast-in-place concrete roof 53, and dismantling a first support 9 after the cast-in-place concrete roof 53 reaches the strength;
and S7, paving a waterproof layer and a protective layer on the top of the prefabricated top plate 51 of the access opening, backfilling and earthing after the protective layer reaches the strength, and stopping dewatering after backfilling is completed.
The subway entrance and exit in the invention adopts a fully assembled structure, thereby saving the construction cost, accelerating the construction progress, connecting the prefabricated underground continuous wall monomers 11 by adopting a mode of rear filling joint piles 13, adopting various water-stopping modes such as water-stopping strips, self-compacting concrete and the like for water prevention outside the structure, and enhancing the structural integrity and the water-proof performance.
While the invention has been described above with reference to the accompanying drawings, it will be apparent that the invention is not limited to the above embodiments, but is intended to cover various modifications, either made by the method concepts and technical solutions of the invention, or applied directly to other applications without modification, within the scope of the invention.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN202411523225.5A CN119041477B (en) | 2024-10-30 | 2024-10-30 | Subway entrance and exit main body and enclosure fully-assembled structure and construction method thereof |
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| CN202411523225.5A CN119041477B (en) | 2024-10-30 | 2024-10-30 | Subway entrance and exit main body and enclosure fully-assembled structure and construction method thereof |
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| CN119041477A true CN119041477A (en) | 2024-11-29 |
| CN119041477B CN119041477B (en) | 2025-03-14 |
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| CN117822648A (en) * | 2023-12-01 | 2024-04-05 | 中国铁路设计集团有限公司 | Permanent-face combined integral assembly type subway station structure and construction method |
| CN117846033A (en) * | 2024-01-29 | 2024-04-09 | 中国建筑第六工程局有限公司 | Construction method for connecting joint pile type prefabricated underground continuous wall |
| JP7540678B1 (en) * | 2023-12-21 | 2024-08-27 | 浙大城市学院 | System and method for backfilling narrow excess trenches in a mine with liquefied hardened soil |
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2024
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Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109518696A (en) * | 2018-11-02 | 2019-03-26 | 东通岩土科技股份有限公司 | Assembled manomelia diaphram wall |
| CN115821979A (en) * | 2022-10-28 | 2023-03-21 | 中电建铁路建设投资集团有限公司 | Novel construction method of underground station with fabricated structure |
| CN116876518A (en) * | 2023-06-20 | 2023-10-13 | 中国建筑第六工程局有限公司 | Construction method suitable for foundation pit supporting of assembled subway entrance and exit in soft soil area |
| CN220284883U (en) * | 2023-07-18 | 2024-01-02 | 中国建筑第四工程局有限公司 | Connection structure of bottom plate structure and underground diaphragm wall |
| CN117822648A (en) * | 2023-12-01 | 2024-04-05 | 中国铁路设计集团有限公司 | Permanent-face combined integral assembly type subway station structure and construction method |
| JP7540678B1 (en) * | 2023-12-21 | 2024-08-27 | 浙大城市学院 | System and method for backfilling narrow excess trenches in a mine with liquefied hardened soil |
| CN117846033A (en) * | 2024-01-29 | 2024-04-09 | 中国建筑第六工程局有限公司 | Construction method for connecting joint pile type prefabricated underground continuous wall |
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| CN119041477B (en) | 2025-03-14 |
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