CN115217141A - Thin-wall multilayer prefabricated steel structure open caisson and construction method - Google Patents
Thin-wall multilayer prefabricated steel structure open caisson and construction method Download PDFInfo
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- CN115217141A CN115217141A CN202210875554.0A CN202210875554A CN115217141A CN 115217141 A CN115217141 A CN 115217141A CN 202210875554 A CN202210875554 A CN 202210875554A CN 115217141 A CN115217141 A CN 115217141A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 144
- 239000010959 steel Substances 0.000 title claims abstract description 144
- 238000010276 construction Methods 0.000 title claims abstract description 24
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 11
- 238000005520 cutting process Methods 0.000 claims abstract description 4
- 239000002689 soil Substances 0.000 claims description 26
- 239000004567 concrete Substances 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 11
- 238000007789 sealing Methods 0.000 claims description 9
- 238000003466 welding Methods 0.000 claims description 9
- 230000002787 reinforcement Effects 0.000 claims description 6
- 230000003068 static effect Effects 0.000 claims description 6
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 230000001788 irregular Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 3
- 238000004064 recycling Methods 0.000 claims description 3
- 239000007787 solid Substances 0.000 claims description 3
- 238000005192 partition Methods 0.000 description 4
- 239000011178 precast concrete Substances 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 230000002093 peripheral effect Effects 0.000 description 3
- 238000010923 batch production Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000638 solvent extraction Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000026676 system process Effects 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
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/18—Foundations formed by making use of caissons
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
-
- 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
-
- 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
- E02D23/08—Lowering or sinking caissons
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Revetment (AREA)
Abstract
The invention relates to a thin-wall multilayer prefabricated steel structure open caisson and a construction method, which adopts multilayer steel plates for prefabricating and processing a well body steel shell, and comprises a steel shell outer cylinder and a steel shell inner cylinder, wherein the bottom of the well body steel shell is spliced by steel plates to form open caisson cutting edge feet, an inner support is arranged in the well body steel shell, and the inner support is in a cross, cross or annular shape. The open caisson construction method utilizes the open caisson construction principle, strengthens the structure of the open caisson wall on the basis, and increases the rigidity and the structural stability of the well body, thereby enabling the open caisson with larger structural size and deeper depth to be constructed and applied. And the form of prefabricated steel structure has been adopted, realizes prefabricating in the factory, compares with reinforced concrete open caisson, and the construction is more convenient, saves the time limit for a project more.
Description
Technical Field
The invention relates to a prefabricated steel structure open caisson, in particular to a thin-wall and layer prefabricated steel structure open caisson and a construction method.
Background
At present, the structural form of the well body of the open caisson technology is usually a cast-in-place reinforced concrete structure or a prefabricated reinforced concrete structure, and particularly, the open caisson project with larger scale is adopted. An assembled prestressed open caisson foundation disclosed as patent publication No. CN214574094U belongs to the technical field of large bridge foundation structures. The open caisson foundation comprises a precast concrete member and a prestressed steel bundle in the precast concrete member, wherein the precast concrete member is formed by splicing peripheral outer walls and inner partition walls, and the inner side of each peripheral outer wall is provided with a well lattice; the peripheral outer wall is formed by splicing and surrounding longitudinal wall angular points, a longitudinal wall middle wall, transverse wall angular points, a transverse wall middle wall, longitudinal wall angular points, a longitudinal wall middle wall, transverse wall angular points and a transverse wall middle wall in sequence. The inner partition wall comprises a longitudinal wall straight wall, a transverse wall straight wall and inner partition wall nodes, and the longitudinal wall straight wall and the transverse wall straight wall are connected through the inner partition wall nodes. The utility model discloses a precast concrete component batch production preparation and cooperation on-the-spot prestressing force stretch-draw can assemble into complete open caisson. However, the existing cast-in-place reinforced concrete structure or prefabricated reinforced concrete structure has the problems of inconvenient construction, long construction period, maintenance of the poured concrete structure and the like. Therefore, a thin-wall multilayer prefabricated steel structure open caisson and a construction method are needed.
Disclosure of Invention
In order to solve the problems in the prior art, the invention provides a thin-wall multilayer prefabricated steel structure open caisson and a construction method.
In order to achieve the purpose, the technical scheme of the invention is as follows: the open caisson with the thin-wall multilayer prefabricated steel structure adopts multilayer steel plates to be prefabricated and processed into a well body steel shell and comprises a steel shell outer barrel and a steel shell inner barrel, the bottom of the well body steel shell is spliced into open caisson cutting edge feet by steel plates, an inner support is arranged inside the well body steel shell, and the inner support is in a cross shape, a cross shape or an annular shape.
The plane form of the well steel shell is circular, rectangular or other irregular polygons.
And the top of the well steel shell adopts a steel ring beam.
The inner support is provided with a plurality of channels or annular surrounding purlins according to the stress condition.
During manufacturing, the shell outer cylinder and the steel shell inner cylinder are reinforced by profile steel, channel steel or angle steel to form a framework, so that the rigidity of the well body is improved to resist lateral soil pressure, or a reinforcement cage is placed after soil is taken out and concrete is poured to form a reinforced concrete solid structure.
And sealing the well body steel shell before or after sinking, wherein a high-pressure jet grouting pile reinforcing process is adopted before sinking, and plain concrete is adopted for sealing the bottom after sinking.
The invention discloses a thin-wall multilayer prefabricated steel structure open caisson construction method, which comprises the following steps:
the first step is as follows: according to the structural shape and size of the open caisson according to design requirements, the open caisson steel shell is prefabricated in sections, and a groove needs to be reserved for on-site assembly, so that on-site welding is facilitated;
the second step is that: measuring a well position, arranging symmetrical positioning points at quartering positions of a well steel shell, arranging two steel sheet piles on each point, arranging eight positioning steel sheet piles on each of an inner steel shell cylinder and an outer steel shell cylinder, and driving the positioning steel sheet piles into the soil body by adopting a vibrating hammer to position the well steel shell;
the third step: transporting the well steel shell to the site, welding and assembling the upper section and the lower section, sinking the well steel shell into the soil body section by adopting a vibration hammer, welding and assembling the upper section and the lower section in a partitioning manner by adopting a plane when the size is larger, sinking the inner steel shell cylinder and the outer steel shell cylinder in sequence, taking soil from the interior of the well steel shell in the sinking process, and constructing an inner support path by path;
the fourth step: sinking and taking out the soil to the designed elevation, then pouring plain concrete in time for bottom sealing construction, adopting the underwater concrete which can be poured and taken out the soil underwater,
the fifth step: removing the positioning steel sheet piles, recycling, and arranging a steel ring beam at the top to increase the integrity of the open caisson;
and a sixth step: and constructing an underground structure in the well.
In the third step, the well steel shell sinks between the steel sheet piles, an ICE resonance-free hammer is adopted to act on the top of the steel shell to provide sinking force, soil is taken while sinking, or static pressure type pile machines are adopted to carry out static pressure sinking, a counter-force beam can be arranged at the top, a ground beam and a balance weight are arranged at the bottom, tensile members such as steel strands are adopted before an upper beam and a lower beam, and a center-penetrating jack is arranged on the counter-force beam at the top to carry out sinking method sinking.
The invention has the beneficial effects that:
the thin-wall multilayer prefabricated steel structure open caisson and the construction method thereof utilize the open caisson construction principle, strengthen the structure of the open caisson wall on the basis, and increase the rigidity and the structural stability of the well body, thereby enabling the open caisson with larger structural size and deeper depth to be constructed and applied. And the form of prefabricated steel construction has been adopted, realizes prefabricating in the batch production, compares with reinforced concrete open caisson, and the construction is more convenient, saves the time limit for a project more. The open caisson adopts multilayer steel shells, steel plates are prefabricated, steel structure forms such as section steel, channel steel or angle steel can be adopted among the multilayer steel shells for reinforcement, reinforced concrete pouring forming can be carried out after soil taking or cement system processes such as high-pressure jet grouting piles are adopted for reinforcement, an inner support system can be arranged in the well body in a steel structure or reinforced concrete form, and therefore the well body is reinforced to resist lateral soil pressure.
The invention has convenient construction and easy processing. The method has the advantages of economy, construction period saving and capability of avoiding the problem that the concrete structure needs a maintenance period.
Drawings
FIG. 1 is a cross-sectional view of a thin-walled multi-layered prefabricated steel structure open caisson of the present invention;
FIG. 2 is a vertical view of the thin-walled multi-layered prefabricated steel structure open caisson of the present invention;
fig. 3 is a positioning diagram of the open caisson steel sheet pile.
Detailed Description
The invention is further described with reference to the following figures and examples.
As shown in the figure 1,2,3, the thin-wall multilayer prefabricated steel structure open caisson is prefabricated and processed into a well body steel shell by adopting multilayer steel plates, and comprises a steel shell outer cylinder 2 and a steel shell inner cylinder 1. The bottom of the well steel shell is spliced by steel plates to form an open caisson cutting edge 5, an inner support 3 is arranged in the well steel shell, and the inner support 3 is in a cross shape, a cross shape or a ring shape. The plane form of the well steel shell is not limited to a circle, and can also be designed into a rectangle or other irregular polygons.
Preferably, a steel ring beam 6 is adopted at the top of the well steel shell. The inner support can be arranged in multiple ways or provided with annular surrounding purlins according to the stress condition 3.
During manufacturing, the steel shell outer cylinder 2 and the steel shell inner cylinder 1 are reinforced by adopting materials such as profile steel, channel steel or angle steel to form a framework, so that the rigidity of the well body is improved to resist lateral soil pressure, or a reinforcement cage is placed after soil is taken and concrete 4 is poured to form a reinforced concrete solid structure, and cement system reinforcing processes such as high-pressure jet grouting piles can be adopted for reinforcement. The well steel shell bottom sealing can be implemented before or after sinking, cement system reinforcing processes such as high-pressure jet grouting piles and the like can be adopted before sinking, and plain concrete bottom sealing can be adopted after sinking.
The invention discloses a thin-wall multilayer prefabricated steel structure open caisson construction method, which comprises the following steps:
the first step is as follows: according to the structural shape and size of the open caisson required by design, the open caisson steel shell is prefabricated in sections, and a groove needs to be reserved for on-site assembly, so that on-site welding is facilitated;
the second step is that: measuring a well position, arranging symmetrical positioning points at quartering positions of a well steel shell, arranging two steel sheet piles 7 on each point, arranging eight positioning steel sheet piles 7 on each steel shell inner cylinder 1 and each steel shell outer cylinder 1, and driving the positioning steel sheet piles into the soil body by adopting a vibrating hammer to position the well steel shell;
the third step: transporting the well steel shell to the site, welding and assembling the upper section and the lower section, sinking the well steel shell into the soil body section by adopting a vibration hammer, welding and assembling the upper section and the lower section in a partitioning manner by adopting a plane when the size is larger, sinking the inner steel shell cylinder and the outer steel shell cylinder in sequence, taking soil from the interior of the well steel shell in the sinking process, and constructing an inner support path by path;
the steel shell sinks between the steel sheet piles, an ICE resonance-free hammer is adopted to act on the top of the steel shell to provide sinking force, soil is taken while sinking, or static pressure type pile machines are adopted to sink in a static pressure mode, a counter-force beam can also be arranged at the top, a ground beam and a balance weight are arranged at the bottom, tensile members such as steel strands are adopted before the upper beam and the lower beam, and a center-penetrating jack is arranged on the counter-force beam at the top to sink by a pressing and sinking method.
The fourth step: sinking and taking out the soil to the designed elevation, pouring plain concrete in time for bottom sealing construction, adopting the underwater concrete which can be poured and taken out the soil underwater,
the fifth step: removing the positioning steel sheet piles, recycling, and arranging a steel ring beam at the top to increase the integrity of the open caisson;
and a sixth step: and constructing an underground structure in the well.
Claims (8)
1. The utility model provides a thin wall multilayer prefabricated steel structure open caisson which characterized in that: the well steel shell is prefabricated and processed by adopting a plurality of layers of steel plates and comprises a steel shell outer cylinder and a steel shell inner cylinder, the bottom of the well steel shell is spliced by steel plates to form a sunk well cutting edge, an inner support is arranged inside the well steel shell, and the inner support is in a cross shape, a cross shape or an annular shape.
2. The thin-walled multi-layered prefabricated steel structure open caisson of claim 1, wherein: the plane form of the well steel shell is circular, rectangular or other irregular polygons.
3. The thin-walled multi-layered prefabricated steel structure open caisson of claim 1, wherein: and the top of the well steel shell is provided with a steel ring beam.
4. The thin-walled multi-layered prefabricated steel structure open caisson of claim 1, wherein: the inner support is provided with a plurality of channels or annular surrounding purlins according to the stress condition.
5. The thin-walled multi-layered prefabricated steel structure open caisson of claim 1, wherein: during manufacturing, the shell outer cylinder and the steel shell inner cylinder are reinforced by profile steel, channel steel or angle steel to form a framework, so that the rigidity of the well body is improved to resist lateral soil pressure, or a reinforcement cage is placed after soil is taken out and concrete is poured to form a reinforced concrete solid structure.
6. The thin-walled multi-layered prefabricated steel structure open caisson of claim 5, wherein: and sealing the well body steel shell before or after sinking, wherein a high-pressure jet grouting pile reinforcing process is adopted before sinking, and plain concrete is adopted for sealing the bottom after sinking.
7. The open caisson construction method of the thin-wall multilayer prefabricated steel structure of any one of claims 1 to 6, characterized by comprising the following steps:
the first step is as follows: according to the structural shape and size of the open caisson required by design, the open caisson steel shell is prefabricated in sections, and a groove needs to be reserved for on-site assembly, so that on-site welding is facilitated;
the second step is that: measuring a well position, arranging symmetrical positioning points at quartering positions of a well steel shell, arranging two steel sheet piles on each point, arranging eight positioning steel sheet piles on each of an inner steel shell cylinder and an outer steel shell cylinder, and driving the positioning steel sheet piles into the soil body by adopting a vibrating hammer to position the well steel shell;
the third step: transporting the well steel shell to a site, welding and assembling the upper section and the lower section, sinking the well steel shell into a soil body section by adopting a vibration hammer, welding and assembling the well steel shell into blocks by adopting a plane when the well steel shell is larger in size, sinking the inner cylinder and the outer cylinder of the steel shell in sequence, taking soil in the well steel shell in the sinking process, and constructing an inner support track by track;
the fourth step: sinking and taking out the soil to the designed elevation, then pouring plain concrete in time for bottom sealing construction, adopting the underwater concrete which can be poured and taken out the soil underwater,
the fifth step: removing the positioning steel sheet piles, recycling, and arranging a steel ring beam at the top to increase the integrity of the open caisson;
and a sixth step: and constructing an underground structure in the well.
8. The construction method according to claim 7, wherein: in the third step, the well steel shell sinks between the steel sheet piles, an ICE resonance-free hammer is adopted to act on the top of the steel shell to provide sinking force, soil is taken while sinking, or static pressure type pile machines are adopted to carry out static pressure sinking, a counter-force beam can be arranged at the top, a ground beam and a balance weight are arranged at the bottom, tensile members such as steel strands are adopted before an upper beam and a lower beam, and a center-penetrating jack is arranged on the counter-force beam at the top to carry out sinking method sinking.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210875554.0A CN115217141A (en) | 2022-07-25 | 2022-07-25 | Thin-wall multilayer prefabricated steel structure open caisson and construction method |
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| CN202210875554.0A CN115217141A (en) | 2022-07-25 | 2022-07-25 | Thin-wall multilayer prefabricated steel structure open caisson and construction method |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1046597A (en) * | 1996-08-07 | 1998-02-17 | Maeda Corp | Execution work method of steel shell caisson |
| 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 |
| CN112609725A (en) * | 2020-12-10 | 2021-04-06 | 上海市基础工程集团有限公司 | Prefabricated steel open caisson construction method suitable for central urban area |
-
2022
- 2022-07-25 CN CN202210875554.0A patent/CN115217141A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1046597A (en) * | 1996-08-07 | 1998-02-17 | Maeda Corp | Execution work method of steel shell caisson |
| 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 |
| CN112609725A (en) * | 2020-12-10 | 2021-04-06 | 上海市基础工程集团有限公司 | Prefabricated steel open caisson construction method suitable for central urban area |
Non-Patent Citations (5)
| Title |
|---|
| 中铁大桥局集团有限公司技术发展中心: "《中铁大桥局集团2005年技术交流大会论文集》", 31 October 2005, pages: 225 * |
| 交通部第一工程局: "《公路施工手册-桥涵上》", 30 April 1985, pages: 846 - 849 * |
| 何升等: "《地质灾害治理工程施工技术》", 30 September 2018, pages: 198 * |
| 刘桂荣, 《山西建筑》, vol. 48, no. 6, pages 71 - 74 * |
| 李明华等, 《桥梁建设》, pages 1 - 4 * |
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