CN110685293A - Annular open caisson structure - Google Patents
Annular open caisson structure Download PDFInfo
- Publication number
- CN110685293A CN110685293A CN201810737294.4A CN201810737294A CN110685293A CN 110685293 A CN110685293 A CN 110685293A CN 201810737294 A CN201810737294 A CN 201810737294A CN 110685293 A CN110685293 A CN 110685293A
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- wall
- open caisson
- well
- annular
- partition wall
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- 238000005192 partition Methods 0.000 claims abstract description 46
- 238000007789 sealing Methods 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 11
- 238000009991 scouring Methods 0.000 abstract description 7
- 238000000034 method Methods 0.000 abstract description 5
- 239000002689 soil Substances 0.000 abstract description 4
- 239000007787 solid Substances 0.000 abstract description 2
- 229910000831 Steel Inorganic materials 0.000 description 12
- 239000010959 steel Substances 0.000 description 12
- 238000010276 construction Methods 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 4
- 239000010410 layer Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000002513 implantation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D23/00—Caissons; Construction or placing of caissons
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Foundations (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses an annular open caisson structure, which comprises an open caisson body, wherein the open caisson body comprises an outer annular well wall and an inner annular well wall, a plurality of partition walls are arranged between the outer annular well wall and the inner annular well wall, an annular space formed between the outer annular well wall and the inner annular well wall is divided into a plurality of independent fan-shaped cavities by the partition walls, and a fan-shaped well hole is arranged in each fan-shaped cavity. The open caisson adopts an annular cross section, has good water flow adaptability, small local scouring depth and small water flow force and wave force borne by the structure, and the fan-shaped well holes are arranged in the fan-shaped cavity, so that the solid area of the partition wall of the open caisson can be reduced, the soil can be uniformly taken in the process of sinking the open caisson, and the sinking of the open caisson is assisted.
Description
Technical Field
The invention belongs to the technical field of open caisson structures, and particularly relates to an annular open caisson structure.
Background
With the rapid development of national economy and the rapid increase of traffic construction requirements, large bridges which are being built and are ready to be built at home and abroad are more and more, and with the appearance of a sea-crossing bridge, the bridge span is larger and larger. Most of the long and large bridges are built on deep and urgent rivers or seas with severe environment, and are often difficult to build, such as deep water, large scouring and the like, which is very unfavorable for bridge construction and makes foundation building more difficult. The construction cost of the bridge substructure generally accounts for 30% of the investment of the whole bridge, and is an important factor influencing the economy of the bridge. The existing common open caisson foundation mainly has the forms of circle, rectangle and round end, the well holes in the cross section are mostly arranged in a row-column manner, and the open caisson foundation has the following problems in the application of bridge deepwater foundation:
(1) the cross section is rectangular and round, and is blunt, and rivers adaptability is poor, and the local scouring depth is big, and the rivers power and the wave power that the structure bore are big.
(2) The section inner borehole determinant arrangement is a non-centrosymmetric structure, and the problem that plane torsion is difficult to correct easily occurs in subsidence.
In the prior art, chinese patent application No. CN201520240322.3 discloses an open caisson structure, which includes two concrete columns, two concrete columns are provided, inner panels are provided at positions close to the tops of inner side surfaces of the two concrete columns, the inner panels are made of steel structures, a bolt is transversely connected between each inner panel and each concrete column, a reinforcing bottom plate is connected to the bottoms of the two concrete columns, the reinforcing bottom plate is connected to the concrete columns through built-in steel nails, a steel tube is provided between the two concrete columns, two ends of the steel tube extend into the concrete columns, a steel tube reinforcing member is installed on the steel tube, the steel tube reinforcing member is made of an inverted trapezoid structure, a partition plate is provided on the lower surface of the steel tube, and the steel tube. Although the structure avoids the problem that the open caisson is only provided with a cylindrical test foundation and a pile foundation, which causes overlarge foundation size and burial depth, the open caisson structure is a cylindrical integrated structure, and has poor water flow adaptability, large local scouring depth and poor structure impact resistance.
Disclosure of Invention
The invention aims to solve the defects of the background technology and provide the annular open caisson structure with good water flow adaptability and strong structure impact resistance.
In order to achieve the purpose, the invention adopts the technical scheme that: the utility model provides an annular open caisson structure, includes the open caisson body, the open caisson body includes outer loop wall of a well and inner ring wall of a well, be provided with a plurality of partition wall between outer loop wall of a well and the inner ring wall of a well, the partition wall separates the annular space that forms between the outer loop wall of a well and the inner ring wall of a well for the fan-shaped cavity that a plurality of is independent, every be provided with fan-shaped wellhole in the fan-shaped cavity.
In the technical scheme, the inner ring well wall is internally provided with the cross-shaped partition wall, the space enclosed by the inner ring well wall is divided into four independent well bores by the cross-shaped partition wall, and the cross section of each well bore is in a quarter-circle shape.
In the above technical solution, the cross partition wall includes a first partition wall and a second partition wall, and the first partition wall and the second partition wall are arranged vertically.
In the technical scheme, the partition walls and the cross partition walls are arranged in a central symmetry mode.
In the technical scheme, the top of the outer ring well wall is provided with a stepped boss cap matched with an external bearing structure.
In the technical scheme, the top of the inner cavity of the open caisson body is provided with the bearing platform, and the inner ring of the outer ring well wall is provided with the bearing boss for mounting the bearing platform.
In the technical scheme, the bottom of the open caisson body is filled with a concrete bottom sealing layer.
In the above technical scheme, the diameter D of the outer ring well wall1Diameter D of inner ring well wall2The ratio of the first to the second is 1:0.4 to 0.8.
The invention has the beneficial effects that:
the open caisson body comprises an outer ring well wall and an inner ring well wall, the open caisson adopts an annular cross section, the water flow adaptability is good, the local scouring depth is small, and the water flow force and the wave force borne by the structure are small.
Secondly, the annular space formed between the outer ring well wall and the inner ring well wall is divided into a plurality of independent fan-shaped cavities by the partition wall, and a fan-shaped well hole is arranged in each fan-shaped cavity, so that the solid area of the partition wall of the open caisson can be reduced, the soil can be uniformly taken in the process of sinking the open caisson, and the sinking of the open caisson is assisted.
Thirdly, the open caisson is of a central symmetrical structure, is easy to position in the open caisson sinking process, does not have the problem that open caisson torsion is difficult to correct, and facilitates symmetrical soil taking in the open caisson hole and bottom sealing concrete construction.
Fourthly, the stepped boss cap is arranged on the top of the outer ring well wall to adapt to the upper bearing structure, the diameter of the open caisson is reduced, the foundation scale is reduced, the stepped boss cap can be applied to inland rivers and ocean environments with deeper water depth or larger scouring, the stress of the bridge foundation structure can be met, and the economy and the practicability of the stepped boss cap are better than those of the conventional foundation form.
Drawings
Fig. 1 is a schematic perspective view of an annular open caisson structure according to the present invention;
FIG. 2 is a schematic cross-sectional view of the annular caisson structure of FIG. 1;
in the figure: the open caisson comprises a 1-open caisson body, a 2-outer ring well wall, a 3-inner ring well wall, a 4-partition wall, a 5-fan-shaped well hole, a 6-cross-shaped partition wall, a 6.1-first partition wall, a 6.2-second partition wall, a 7-well hole, an 8-step boss cap, a 9-bearing platform and a 10-bearing boss.
Detailed Description
The invention will be further described in detail with reference to the following drawings and specific examples, which are not intended to limit the invention, but are for clear understanding.
The annular open caisson structure shown in fig. 1 comprises an open caisson body 1, wherein a steel open caisson, a concrete open caisson or a steel-concrete combined open caisson can be adopted as an open caisson foundation, the open caisson body 1 comprises an outer ring well wall 2 and an inner ring well wall 3, the open caisson adopts an annular cross section, the water flow adaptability is good, the local scouring depth is small, and the water flow force and the wave force borne by the structure are small. Diameter D of outer ring well wall 21Diameter D of inner ring well wall 32The ratio of the first to the second is 1:0.4 to 0.8. The top of the outer ring well wall 2 is provided with a step-shaped boss cap 8 matched with an external bearing structure. The top of the inner cavity of the open caisson body 1 is provided with a bearing platform 9, the inner ring of the outer ring well wall 2 is provided with a bearing boss 10 for mounting the bearing platform 9, and the bottom of the open caisson body 1 is filled with a concrete bottom sealing layer 11. The top of the outer ring well wall 2 is provided with a stepped boss cap to adapt to the structure of an upper bearing structure, the diameter of the open caisson is reduced, and the scale of the foundation is reduced.
As shown in fig. 2, a plurality of partition walls 4 are arranged between the outer ring well wall 2 and the inner ring well wall 3, the partition walls 4 divide an annular space formed between the outer ring well wall 2 and the inner ring well wall 3 into a plurality of independent fan-shaped cavities, and a fan-shaped well hole 5 is arranged in each fan-shaped cavity. Be provided with cross partition wall 6 in the inner ring wall of a well 3, partition wall 4 and cross partition wall 6 all are central symmetry and arrange central symmetry fan-shaped wellhole around the annular cross section, can reduce open caisson partition wall entity area, and central symmetry arranges, and the open caisson sinks the in-process and evenly fetches earth, and supplementary open caisson sinks. The cross-shaped partition wall 6 divides the space enclosed by the inner annular well wall 3 into four independent well bores 7, and the cross section of each well bore 7 is in a quarter-circle shape. The cross partition wall 6 comprises a first partition wall 6.1 and a second partition wall 6.2, the first partition wall 6.1 and the second partition wall 6.2 are vertically arranged, and therefore the symmetrical cross partition walls are arranged in the middle round hole, so that the symmetrical soil taking and bottom sealing concrete construction in the well hole are facilitated.
The open caisson can be constructed by adopting the following construction method: firstly, pre-protecting the seabed within the range of 20m around the open caisson by adopting a method of throwing and filling a protective layer; integrally manufacturing and molding the steel open caisson in a dock near a bridge position, and floating and transporting the steel open caisson to the bridge position; accurately positioning by using a positioning boat or an anchor positioning system of an anchor, and pouring water to sink the implantation bed to a stable depth; pouring concrete in the well wall and the partition wall; the sinking and mud sucking of the open caisson are alternately carried out with the concrete heightening until the blade foot of the open caisson reaches the designed elevation; then cleaning the open caisson hole and pouring bottom sealing concrete; and finally, constructing concrete on the bearing platform.
The above description is only for the specific embodiments of the present invention, and it should be noted that the remaining detailed descriptions are related to the prior art, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the protection scope of the present invention.
Claims (8)
1. The utility model provides an annular open caisson structure, includes open caisson body (1), its characterized in that: open caisson body (1) includes outer loop wall of a well (2) and inner ring wall of a well (3), be provided with a plurality of partition wall (4) between outer loop wall of a well (2) and the inner ring wall of a well (3), annular space that partition wall (4) formed between with outer loop wall of a well (2) and the inner ring wall of a well (3) is a plurality of independent fan-shaped cavity, every be provided with fan-shaped well bore (5) in the fan-shaped cavity.
2. The annular caisson structure of claim 1, wherein: be provided with cross partition wall (6) in the inner ring wall of a well (3), space that cross partition wall (6) enclose inner ring wall of a well (3) is four independent wellholes (7), every the cross section of wellhole (7) personally submits quarter circular form.
3. The annular caisson structure of claim 2, wherein: the cross-shaped partition wall (6) comprises a first partition wall (6.1) and a second partition wall (6.2), and the first partition wall (6.1) and the second partition wall (6.2) are vertically arranged.
4. The annular caisson structure of claim 3, wherein: the partition wall (4) and the cross partition wall (6) are arranged in a central symmetry manner.
5. The annular caisson structure of claim 1, or 2, or 3, or 4, wherein: and a step-shaped boss cap (8) matched with an external bearing structure is arranged at the top of the outer ring well wall (2).
6. The annular caisson structure of claim 1, or 2, or 3, or 4, wherein: the open caisson is characterized in that a bearing platform (9) is arranged at the top of an inner cavity of the open caisson body (1), and a bearing boss (10) for mounting the bearing platform (9) is arranged on an inner ring of the outer ring well wall (2).
7. The annular caisson structure of claim 1, or 2, or 3, or 4, wherein: the bottom of the open caisson body (1) is filled with a concrete bottom sealing layer (11).
8. The annular caisson structure of claim 1, or 2, or 3, or 4, wherein: the diameter D of the outer ring well wall (2)1Diameter D with the inner ring well wall (3)2The ratio of the first to the second is 1:0.4 to 0.8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810737294.4A CN110685293A (en) | 2018-07-06 | 2018-07-06 | Annular open caisson structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810737294.4A CN110685293A (en) | 2018-07-06 | 2018-07-06 | Annular open caisson structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110685293A true CN110685293A (en) | 2020-01-14 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810737294.4A Pending CN110685293A (en) | 2018-07-06 | 2018-07-06 | Annular open caisson structure |
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| CN (1) | CN110685293A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111456066A (en) * | 2020-03-13 | 2020-07-28 | 中铁大桥勘测设计院集团有限公司 | Novel self-correcting open caisson and correcting method thereof |
| CN116356870A (en) * | 2023-03-21 | 2023-06-30 | 中铁第四勘察设计院集团有限公司 | Embedded open caisson foundation and construction method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510531A (en) * | 2013-09-18 | 2014-01-15 | 中交公路长大桥建设国家工程研究中心有限公司 | Split type open caisson pile-added combined anchorage foundation and construction method thereof |
| CN105421479A (en) * | 2015-11-24 | 2016-03-23 | 中铁大桥勘测设计院集团有限公司 | Large-scale wading ring-shaped rigid foundation and construction method thereof |
| JP2016084660A (en) * | 2014-10-28 | 2016-05-19 | 若築建設株式会社 | Foundation structure of off-shore wind turbine generator |
| CN208501718U (en) * | 2018-07-06 | 2019-02-15 | 中铁第四勘察设计院集团有限公司 | A kind of annular caisson structure |
-
2018
- 2018-07-06 CN CN201810737294.4A patent/CN110685293A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103510531A (en) * | 2013-09-18 | 2014-01-15 | 中交公路长大桥建设国家工程研究中心有限公司 | Split type open caisson pile-added combined anchorage foundation and construction method thereof |
| JP2016084660A (en) * | 2014-10-28 | 2016-05-19 | 若築建設株式会社 | Foundation structure of off-shore wind turbine generator |
| CN105421479A (en) * | 2015-11-24 | 2016-03-23 | 中铁大桥勘测设计院集团有限公司 | Large-scale wading ring-shaped rigid foundation and construction method thereof |
| CN208501718U (en) * | 2018-07-06 | 2019-02-15 | 中铁第四勘察设计院集团有限公司 | A kind of annular caisson structure |
Non-Patent Citations (1)
| Title |
|---|
| 李明华;杨灿文;: "武汉鹦鹉洲长江大桥北锚碇新型沉井基础设计", 桥梁建设, no. 04, 28 August 2011 (2011-08-28), pages 1 - 4 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111456066A (en) * | 2020-03-13 | 2020-07-28 | 中铁大桥勘测设计院集团有限公司 | Novel self-correcting open caisson and correcting method thereof |
| CN116356870A (en) * | 2023-03-21 | 2023-06-30 | 中铁第四勘察设计院集团有限公司 | Embedded open caisson foundation and construction method thereof |
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