CN113006121A - Composite anchorage foundation suitable for large-span suspension bridge and construction method thereof - Google Patents
Composite anchorage foundation suitable for large-span suspension bridge and construction method thereof Download PDFInfo
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- CN113006121A CN113006121A CN202110241399.2A CN202110241399A CN113006121A CN 113006121 A CN113006121 A CN 113006121A CN 202110241399 A CN202110241399 A CN 202110241399A CN 113006121 A CN113006121 A CN 113006121A
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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
- E02D27/20—Caisson foundations combined with pile foundations
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D19/00—Structural or constructional details of bridges
- E01D19/14—Towers; Anchors ; Connection of cables to bridge parts; Saddle supports
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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
- E02D27/32—Foundations for special purposes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/24—Prefabricated piles
- E02D5/28—Prefabricated piles made of steel or other metals
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0004—Synthetics
- E02D2300/0018—Cement used as binder
- E02D2300/002—Concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
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Abstract
The invention discloses a composite anchorage foundation suitable for a large-span suspension bridge and a construction method thereof, wherein the foundation comprises a single open caisson and a steel pipe pile arranged at the lower end of the single open caisson; the steel pipe pile and the single open caisson are poured into a whole; the single open caisson comprises an open caisson wall, an open caisson partition wall and an open caisson cover plate arranged at the upper end of the open caisson partition wall; all the open caisson walls form a rectangle, any two parallel open caisson walls are connected through a plurality of open caisson partition walls, and the open caisson partition walls are parallel to the open caisson walls and are lower than the open caisson walls in height; open caisson wellholes are formed between the open caisson partition wall and the open caisson wall and between the open caisson wall and the open caisson wall; bottom sealing concrete is arranged at the bottom of the open caisson hole, and a hole filling core is arranged between the open caisson cover plate and the bottom sealing concrete; and reserved pile holes which are communicated are formed in the open caisson partition wall and the open caisson wall, the steel pipe piles are arranged in the reserved pile holes, and the tops of the steel pipe piles are embedded into the bottoms of the reserved pile holes. The invention can not only reduce the depth of the single open caisson into the soil, but also reduce the difficulty of anchorage construction.
Description
Technical Field
The invention relates to a composite anchorage foundation suitable for a large-span suspension bridge (>1000m) and a construction method thereof, belonging to the technical field of civil engineering construction.
Background
Along with the gradual increase of the span of the large-span suspension bridge, the tension of the main cable of the upper structure of the suspension bridge is increased in a non-square exponential mode, so that the scale of the anchorage is sharply enlarged, the foundation construction of the anchorage is more and more complex, the construction difficulty is more and more high, and the construction cost is more and more high. At present, the gravity type anchorage commonly used at home and abroad mainly comprises an anchorage open caisson foundation and an anchorage ground diaphragm wall foundation, but the two gravity type anchorage foundations are often huge in size in a large-span suspension bridge, so that the problems of difficult construction and high construction cost exist. Sinking of the open caisson in an uneven soil layer is difficult, and the open caisson is inclined due to sand running easily during construction; diaphragm wall construction equipment is expensive, the technology is complex, the quality requirement is high, and a large amount of slurry can be generated.
In the existing design method of the open caisson and the steel pipe pile, the composite structure of the open caisson and the steel pipe pile can integrate the advantages of the open caisson and the steel pipe pile, and the purposes of reducing the manufacturing cost and improving the construction efficiency are achieved. The Chinese invention patent (application publication No. CN109914454A) discloses a method for constructing a tubular pile and a sunk well in a combined manner. The Chinese invention patent (application publication No. CN102322069B) discloses an underwater combined foundation of an open caisson and a steel pipe pile and a construction method thereof, and the underwater combined foundation of the open caisson and the steel pipe pile manufactured by the construction method can effectively improve the bearing capacity of an underwater bridge foundation and has strong ship impact resistance. The method has the common characteristics that the steel pipe piles are constructed firstly and then the open caisson is constructed, the steel pipe piles are all constructed in the open caisson hole, and the stress of the open caisson and the steel pipe piles is mainly vertical stress. However, for a large-span suspension bridge with the length of more than 1000m, the anchor foundation not only bears huge vertical force, but also bears huge horizontal force, and the application of the composite anchor foundation mainly taking transverse stress in the anchor structure of the large-span suspension bridge is not reported.
Disclosure of Invention
The invention provides a composite anchorage foundation suitable for a large-span suspension bridge and a construction method thereof. The method can integrate the advantages of the single open caisson foundation and the large-diameter steel pipe pile, greatly reduce the construction difficulty on one hand, and remarkably reduce the manufacturing cost on the other hand.
The invention adopts the following technical scheme:
a composite anchorage foundation suitable for a large-span suspension bridge comprises a single open caisson and a steel pipe pile arranged at the lower end of the single open caisson; the steel pipe pile and the single open caisson are poured into a whole; the single open caisson comprises an open caisson wall, an open caisson partition wall and an open caisson cover plate arranged at the upper end of the open caisson partition wall; all the open caisson walls form a rectangle, any two parallel open caisson walls are connected through a plurality of open caisson partition walls, and the open caisson partition walls are parallel to the open caisson walls and are lower than the open caisson walls in height; open caisson wellholes are formed between the open caisson partition wall and the open caisson wall and between the open caisson wall and the open caisson wall; bottom sealing concrete is arranged at the bottom of the open caisson hole, and a hole filling core is arranged between the open caisson cover plate and the bottom sealing concrete; and the open caisson partition wall and the open caisson wall are both provided with through reserved pile holes, the steel pipe piles are arranged in the reserved pile holes, and the tops of the steel pipe piles are embedded into the bottoms of the reserved pile holes.
In the above technical solution, further, the reserved pile hole is divided into two types: the first reserved pile holes are positioned at the intersection of any two open caisson walls, the intersection of any two open caisson partition walls and the intersection of the open caisson walls and the open caisson partition walls; the second reserved pile holes are located on the wall of the open caisson and the partition wall of the open caisson, and any one of the second reserved pile holes is located at the midpoint of two adjacent first reserved pile holes.
Furthermore, the width B of the monomer open caisson is 30-60 m, and the length L of the monomer open caisson is less than or equal to 2B.
Furthermore, the single open caisson is manufactured in sections, the first open caisson adopts a prefabricated steel shell open caisson, and the height H of the first open caisson1The section area of the wall of the single caisson in the height of 2 times of the pile diameter from bottom to top of the wall of the first section of the caisson is larger than the section area of other positions of the single caisson, and the section area is used for ensuring that the distance between the center point of a pile in a reserved pile hole in the cross section of the wall of the single caisson and the edge of the wall of the single caisson is not smaller than 1 time of the pile diameter; preparing reinforced concrete open caisson by adopting cast-in-place mode for other open caisson sections, wherein the sections of the reinforced concrete open caisson sections are consistent, and the height H of each reinforced concrete open caisson section is equal2＝4～12m。
Further, the steel pipe piles are large-diameter steel pipe piles, the diameter D of each steel pipe pile is 1-3 m, and the distance between any two adjacent steel pipe piles is larger than or equal to 3D.
Furthermore, the depth of the steel pipe pile embedded into the hard rock-soil layer is not less than 2D, and sufficient horizontal resistance is provided for the anchorage foundation through the interaction of the steel pipe pile and the rock-soil body. The average value N of the heavy cone dynamic penetration hammering number of the hard rock-soil layer63.5Not less than 30.
Furthermore, the height h of the steel pipe pile embedded into the reserved pile hole of the single open caisson is more than or equal to 0.5D, the steel pipe pile and the reserved pile hole are connected through pouring reinforced concrete, and the concrete is poured into the reserved pile hole of the single open caisson to penetrate through the height of the whole single open caisson, so that the single open caisson and the steel pipe pile are poured into a whole.
The invention also provides a construction method of the composite anchorage foundation suitable for the large-span suspension bridge, which comprises the following steps:
1. prefabricating a first section of steel shell open caisson on land;
2. floating and transporting the first section of the steel shell open caisson to a construction site, pouring concrete at the wall of the open caisson and the partition wall of the open caisson, continuously increasing the sinking height of the open caisson, and simultaneously continuously connecting a high open caisson to a designed elevation;
3. constructing the steel pipe piles, namely constructing the large-diameter steel pipe piles in two batches in the reserved pile holes of the single open caisson, pouring reinforced concrete in the reserved pile holes to the top end of the open caisson, and penetrating through the height of the open caisson;
4. and pouring bottom sealing concrete, filling the core in the open caisson hole, and then pouring the open caisson cover plate.
In the construction method, the single open caisson is manufactured in sections, the first section of the open caisson is a prefabricated steel shell open caisson, the rest sections of the open caisson are cast-in-place reinforced concrete open caisson, the first section of the prefabricated steel shell open caisson is firstly transported to a construction site in a floating mode, and the first section of the steel shell open caisson sinks and is continuously connected with the high cast-in-place reinforced concrete open caisson to a designed elevation; then, constructing steel pipe piles at reserved pile holes of the wall of the open caisson and the partition wall of the open caisson by taking the single open caisson as a construction platform, and pouring concrete in the reserved pile holes until the top end of the single open caisson forms a whole of the single open caisson and the steel pipe piles; pouring bottom sealing concrete, and filling cores in the open caisson hole; and (4) pouring the open caisson cover plate.
The invention principle of the invention is as follows:
the invention provides a composite anchorage foundation suitable for a large-span suspension bridge and a construction method thereof, wherein a large-diameter steel pipe pile is not driven into a single open caisson hole, pile holes are reserved in the single open caisson wall and a single open caisson partition wall, and the steel pipe pile is driven into the single open caisson serving as a construction platform when the single open caisson is sunk to a designed elevation. The single open caisson mainly bears horizontal force, the large-diameter steel pipe pile bears vertical force transmitted by the single open caisson on one hand, and the large-diameter steel pipe pile and the rock-soil layer jointly act to provide partial horizontal resistance on the other hand. The known monomer open caisson has strong integrity, good stability and high bearing capacity; the steel pipe pile is convenient to construct compared with a single open caisson, the steel pipe pile is embedded into a hard rock-soil layer, partial horizontal resistance can be provided under the combined action of the steel pipe pile and the rock-soil layer, and the composite anchorage foundation of the single open caisson and the steel pipe pile can provide enough horizontal resistance in a large-span suspension bridge to resist the main cable tension of the suspension bridge.
The invention has the following beneficial effects:
1. the novel composite anchorage foundation suitable for the single open caisson and the large-diameter steel pipe pile of the large-span suspension bridge is provided, and a new way is opened up for solving the difficult problem of constructing the anchorage foundation of the large-span suspension bridge;
2. compared with the traditional anchorage single open caisson foundation, the single open caisson has the advantages that the height of the single open caisson is greatly reduced, meanwhile, the height of the partition wall and the height of the well hole core filling are also obviously reduced, the single open caisson is only constructed in shallow soil, and the construction difficulty of the single open caisson is reduced;
3. the construction process of the steel pipe pile is mature, the construction speed is high, the construction cost is low, the steel pipe pile is suitable for various complex strata, the construction is convenient, the steel pipe pile can provide enough bending moment and shearing force to resist partial main cable pulling force, the composite anchorage foundation form provided by the invention can shorten the construction period and reduce the construction cost;
4. according to the composite anchorage construction method provided by the invention, one part of the horizontal component of the main cable tension is provided by the interaction between the single open caisson and the soil body, and the other part of the horizontal component is provided by the interaction between the steel pipe pile and the soil body, so that the horizontal bearing capacity of the single open caisson, the steel pipe pile and the soil body is fully exerted.
Drawings
The invention is further described with reference to the following figures:
FIG. 1 is a bottom view of a first section of a prefabricated steel shell monomer open caisson according to an embodiment of the invention;
fig. 2 is a bottom view of a composite anchor foundation of a single open caisson and steel pipe pile according to an embodiment of the invention;
fig. 3 is a front view of a composite anchorage foundation of a single open caisson and steel pipe pile according to an embodiment of the invention;
FIG. 4 is a front view of a conventional single caisson anchorage foundation;
fig. 5 is a schematic view of a connection structure of a single open caisson and a steel pipe pile according to an embodiment of the present invention;
fig. 6 is a construction flow chart of a composite anchorage foundation of a single open caisson and steel pipe pile according to an embodiment of the invention;
wherein: 1. pile holes are reserved; 2. a well sinking cover plate; 3. the wall of the open caisson; 4. well bore stuffing; 5. an open caisson partition wall; 6. sealing bottom concrete; 7. connecting the open caisson and the steel pipe pile; 8. a first batch of steel pipe piles; 9. a second batch of steel pipe piles; 10. a single open caisson; 11. and (4) a reinforcement cage.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention.
The invention provides a composite anchorage foundation suitable for a single open caisson and steel pipe piles of a large-span suspension bridge and a construction method thereof. In the structure, the height of the single open caisson is obviously reduced, and the single open caisson does not need to be sunk to a hard rock-soil layer, so that the construction difficulty of the single open caisson is greatly reduced; the steel pipe pile is embedded into a hard rock-soil layer to provide sufficient horizontal resistance, but the steel pipe pile is not only low in cost, but also high in construction efficiency. The composite anchorage foundation can effectively shorten the construction period and reduce the manufacturing cost on the premise of controlling the displacement of the anchorage.
Fig. 6 is a construction flow chart of a composite anchorage foundation of a single open caisson and steel pipe pile, and the specific construction method is as follows:
1. prefabricating a first section of steel shell open caisson, and reserving a reserved pile hole 1 in the open caisson wall 3 and the open caisson partition wall 5 according to a design scheme, as shown in figure 1;
2. the first section of steel shell open caisson is transported to a construction site in a floating mode, concrete is poured into the open caisson wall 3 and the open caisson partition wall 5, meanwhile, soil is taken out from the open caisson wall 3 and the open caisson hole, so that the open caisson sinks gradually, real-time observation is carried out in the whole process of the open caisson sinking, the displacement and the inclination of the open caisson are mastered in time, the plane position and the verticality of the single open caisson 10 are kept correct, the well body of the single open caisson is kept balanced all the time, when the open caisson sinks to the designed elevation due to the height, the peripheral soil layer is not required to be dug too deeply, and the inclination of the well body is avoided;
3. and (3) driving steel pipe piles into the reserved pile holes 1 of the single open caisson 10 by taking the single open caisson 10 as a construction platform, wherein the steel pipe piles are constructed in two batches, as shown in figure 2. The first batch of steel-pipe piles 8 are steel-pipe piles at the intersection of any two open caisson walls 3, the intersection of any two open caisson partition walls 5, the two-two intersection of the open caisson walls 3 and the open caisson partition walls 5, and the construction of the first batch of steel-pipe piles 8 is to provide enough vertical force to keep the stability of the single open caisson 10. Compared with the existing design scheme of the single open caisson anchorage foundation, in the composite anchorage foundation design of the single open caisson and the steel pipe pile, the penetration depth of the single open caisson 10 is greatly reduced, so that the bearing capacity provided by the rock-soil layer of the single open caisson 10 is low, and in order to ensure the stability of the single open caisson 10, the steel pipe piles of the first batch are immediately constructed to the designed elevation after the single open caisson 10 sinks to the right position, so that the sufficient foundation bearing capacity is provided.
4. In the process of constructing the steel pipe pile, before hammering the sinking pile, checking whether the pile cap is consistent with the center of the pile, lightly hammering the sinking pile by adopting a heavy hammer at the earlier stage to ensure that the steel pipe pile stably sinks under the condition of keeping the verticality, gradually increasing the impact energy along with deepening of soil until the pile end of the steel pipe pile reaches the designed elevation, embedding the pile top of the steel pipe pile into the single sinking well 10, wherein the pile diameter of the steel pipe pile is not less than 0.5 time;
5. after the steel pipe pile is constructed, placing a reinforcement cage 11 in the reserved pile hole 1, as shown in fig. 5, pouring concrete in the reserved pile hole 1 to the top end of the single open caisson 10, so that the single open caisson 10 and the steel pipe pile form a whole;
6. the second batch of steel pipe piles 9 are steel pipe piles driven at the middle point between any two adjacent steel pipe piles in the first batch of steel pipe piles 8, and the two batches of steel pipe piles and the single open caisson 17 finally provide horizontal resistance together to balance the horizontal component of the tension of the main cable; after the first batch of steel pipe piles 8 are constructed, a second batch of steel pipe piles 9 are immediately constructed, the second batch of steel pipe piles 9 are located at the middle points of two adjacent first batch of steel pipe piles 8, the pile diameters of all the steel pipe piles are the same, the pile diameter is 1.0-3.0 m and is a large-diameter steel pipe pile, and the distance between any two steel pipe piles is not less than 3.0 times of the pile diameter, as shown in fig. 2.
7. Repeating the step 4-5;
8. cleaning the base of the single caisson 10, pouring the bottom sealing concrete 6 of the single caisson 10, and performing waterproof work, as shown in fig. 3;
9. filling the open caisson hole with the hole filler 4, as shown in fig. 3;
10. and pouring the open caisson cover plate 2, as shown in fig. 3.
Fig. 3 and 4 are schematic diagrams of an existing single open caisson anchorage foundation and a single open caisson + large-diameter steel pipe pile (>1.0m) composite anchorage foundation provided by the invention. As can be seen from the figure, the invention not only can reduce the penetration depth of the single open caisson, but also can reduce the construction difficulty of the anchorage, shorten the construction period and reduce the construction cost.
Claims (9)
1. A composite anchorage foundation suitable for a large-span suspension bridge is characterized by comprising a single open caisson and a steel pipe pile arranged at the lower end of the single open caisson; the steel pipe pile and the single open caisson are poured into a whole; the single open caisson comprises an open caisson wall, an open caisson partition wall and an open caisson cover plate arranged at the upper end of the open caisson partition wall; all the open caisson walls form a rectangle, any two parallel open caisson walls are connected through a plurality of open caisson partition walls, and the open caisson partition walls are parallel to the open caisson walls and are lower than the open caisson walls in height; open caisson wellholes are formed between the open caisson partition wall and the open caisson wall and between the open caisson wall and the open caisson wall; bottom sealing concrete is arranged at the bottom of the open caisson hole, and a hole filling core is arranged between the open caisson cover plate and the bottom sealing concrete; and the open caisson partition wall and the open caisson wall are both provided with through reserved pile holes, the steel pipe piles are arranged in the reserved pile holes, and the tops of the steel pipe piles are embedded into the bottoms of the reserved pile holes.
2. The composite anchorage foundation applicable to the large-span suspension bridge of claim 1, wherein the reserved pile holes are divided into two types: the first reserved pile holes are positioned at the intersection of any two open caisson walls, the intersection of any two open caisson partition walls and the intersection of the open caisson walls and the open caisson partition walls; the second reserved pile hole is positioned at the midpoint of two adjacent first reserved pile holes.
3. The composite anchorage foundation applicable to the long-span suspension bridge of claim 1, wherein the width of the single caisson is 30-60 m, and the length of the single caisson is not more than 2 times of the width.
4. The composite anchorage foundation suitable for the large-span suspension bridge of claim 1, wherein the single open caisson is manufactured in sections, the first open caisson is a prefabricated steel shell open caisson, the height of the first open caisson is not less than 8m, the cross-sectional area of the open caisson wall of the first open caisson within 2 times of the height of the pile diameter from bottom to top is larger than the cross-sectional area of other positions of the single open caisson, and the composite anchorage foundation is used for ensuring that the distance from the center point of a pile in a reserved pile hole in the cross section of the open caisson wall to the edge of the open caisson wall is not less than 1 time of the pile diameter; and preparing the reinforced concrete open caisson by adopting a cast-in-place mode for the rest sections of open caisson, wherein the sections of the reinforced concrete open caisson are consistent, and the height of the reinforced concrete open caisson is 4-12 m.
5. The composite anchorage foundation suitable for the large-span suspension bridge of claim 1, wherein the diameter of the steel pipe piles is 1-3 m, and the distance between any two adjacent steel pipe piles is not less than 3 times of the diameter of the steel pipe piles.
6. The composite anchorage foundation applicable to large-span suspension bridges as claimed in claim 1, wherein the depth of embedding the steel pipe pile into the hard rock-soil layer is not less than 2 times of the diameter of the steel pipe pile, and the average value N of the heavy cone dynamic penetration hammering number of the hard rock-soil layer is N63.5Not less than 30.
7. The composite anchorage foundation suitable for the large-span suspension bridge of claim 1, wherein the height of the reserved pile hole for embedding the steel pipe pile into the single open caisson is not less than half of the diameter of the steel pipe pile, and the steel pipe pile and the reserved pile hole are connected by pouring reinforced concrete.
8. A construction method of a composite anchorage foundation suitable for a large-span suspension bridge according to any one of claims 1 to 7, characterized by comprising the following steps:
1) prefabricating a first section of steel shell open caisson on land;
2) floating and transporting the first section of the steel shell open caisson to a construction site, pouring concrete at the wall of the open caisson and the partition wall of the open caisson, continuously increasing the sinking height of the open caisson, and simultaneously continuously connecting a high open caisson to a designed elevation;
3) constructing the steel pipe piles in the reserved pile holes of the single open caisson in two batches, pouring reinforced concrete in the reserved pile holes to the top end of the open caisson and penetrating the open caisson height;
4) and pouring bottom sealing concrete in the open caisson hole, then continuously filling the hole filling core on the bottom sealing concrete, and then pouring the open caisson cover plate.
9. The construction method of the composite anchorage foundation applicable to the large-span suspension bridge as claimed in claim 8, wherein the construction of the steel pipe pile in two batches specifically comprises the following steps:
1) using the single open caisson as a construction platform, and driving a first batch of steel pipe piles into reserved pile holes of the single open caisson; the first batch of steel pipe piles are steel pipe piles at the intersection of any two open caisson walls, the intersection of any two open caisson partition walls and the intersection of every two open caisson walls and the open caisson partition walls;
2) in the process of constructing the steel pipe pile, before hammering the pile, checking whether the pile cap is consistent with the center of the pile, lightly hammering the pile by adopting a heavy hammer in the early stage of pile sinking to ensure that the steel pipe pile stably sinks under the condition of keeping verticality, and gradually increasing impact energy along with deepening of soil until the pile end of the steel pipe pile reaches the designed elevation;
3) after the steel pipe pile is constructed, placing a reinforcement cage in the reserved pile hole, and then pouring concrete in the reserved pile hole to the top end of the single open caisson to enable the single open caisson and the steel pipe pile to form a whole;
4) after the first batch of steel pipe piles are constructed, immediately constructing a second batch of steel pipe piles, wherein the second batch of steel pipe piles are positioned at the middle points of two adjacent first batch of steel pipe piles;
5) and (5) repeating the steps 2) to 3), and finishing the construction of the steel pipe pile.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110241399.2A CN113006121A (en) | 2021-03-04 | 2021-03-04 | Composite anchorage foundation suitable for large-span suspension bridge and construction method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110241399.2A CN113006121A (en) | 2021-03-04 | 2021-03-04 | Composite anchorage foundation suitable for large-span suspension bridge and construction method thereof |
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| CN113006121A true CN113006121A (en) | 2021-06-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113865527A (en) * | 2021-09-29 | 2021-12-31 | 中交二公局华东建设有限公司 | Suspension bridge open caisson is inhaled mud and is used high detection device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101962958A (en) * | 2009-07-22 | 2011-02-02 | 中交公路规划设计院有限公司 | Bridge composite foundation consisting of open caisson and pile and construction method |
-
2021
- 2021-03-04 CN CN202110241399.2A patent/CN113006121A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101962958A (en) * | 2009-07-22 | 2011-02-02 | 中交公路规划设计院有限公司 | Bridge composite foundation consisting of open caisson and pile and construction method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113865527A (en) * | 2021-09-29 | 2021-12-31 | 中交二公局华东建设有限公司 | Suspension bridge open caisson is inhaled mud and is used high detection device |
| CN113865527B (en) * | 2021-09-29 | 2024-04-12 | 中交二公局华东建设有限公司 | Suspension bridge open caisson is high detection device for suction dredge |
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