CN114541461A - Underpinning method for subway open cut area to penetrate through non-drainage power transfer tower foundation - Google Patents
Underpinning method for subway open cut area to penetrate through non-drainage power transfer tower foundation Download PDFInfo
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- CN114541461A CN114541461A CN202210209125.XA CN202210209125A CN114541461A CN 114541461 A CN114541461 A CN 114541461A CN 202210209125 A CN202210209125 A CN 202210209125A CN 114541461 A CN114541461 A CN 114541461A
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- electric tower
- foundation
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- electric
- open cut
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000009424 underpinning Methods 0.000 title claims abstract description 21
- 238000010276 construction Methods 0.000 claims abstract description 23
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 230000002787 reinforcement Effects 0.000 claims 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 6
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005192 partition 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
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/04—Making large underground spaces, e.g. for underground plants, e.g. stations of underground railways; Construction or layout thereof
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/045—Underground structures, e.g. tunnels or galleries, built in the open air or by methods involving disturbance of the ground surface all along the location line; Methods of making them
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/06—Separating, lifting, removing of buildings; Making a new sub-structure
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/20—Side-supporting means therefor, e.g. using guy ropes or struts
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H12/00—Towers; Masts or poles; Chimney stacks; Water-towers; Methods of erecting such structures
- E04H12/22—Sockets or holders for poles or posts
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Paleontology (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- Electrochemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Chemical & Material Sciences (AREA)
- Sustainable Development (AREA)
- Electric Cable Installation (AREA)
Abstract
The invention discloses a underpinning method for a subway open cut area to pass through a non-drainage power transfer tower foundation, which comprises the following steps: constructing a new foundation of the electric tower above the original foundation of the electric tower; constructing an electric tower cover plate above the new foundation of the electric tower; dismantling the original foundation of the electric tower; and constructing an open cut frame structure below the new foundation of the electric tower by a cover-cutting reverse construction method. By the underpinning method, the electric tower does not need to be moved, the moving cost is reduced, the influence of delay of the construction period caused by the change of the electric tower is avoided, the construction efficiency can be improved, and in addition, the safety of the electric tower structure can be ensured during construction without influencing normal power supply.
Description
Technical Field
The invention relates to the field of tunnel construction, in particular to a underpinning method for a subway open cut section to pass through a non-drainage migrating tower foundation.
Background
At present, subway construction enters a high-speed development period, urban traffic pressure can be relieved by large-city subway operation, and the concept of green travel is also met. In the construction of subway engineering, the structures are usually removed when meeting the structures, so that the construction cost is increased, and the removal progress restricts the construction period of the whole project.
Therefore, how to improve the construction efficiency when the subway construction meets the structure is a technical problem that needs to be solved urgently by the technical personnel in the field.
Disclosure of Invention
The invention aims to provide a underpinning method for a subway open cut section to pass through a non-drainage migrating tower foundation, which can effectively improve the construction efficiency.
In order to solve the technical problems, the invention provides the following technical scheme:
a underpinning method for a subway open cut section to penetrate through a non-drainage power transfer tower foundation comprises the following steps:
constructing a new foundation of the electric tower above the original foundation of the electric tower;
constructing an electric tower cover plate above the new foundation of the electric tower;
dismantling the original foundation of the electric tower;
and constructing an open cut frame structure below the new foundation of the electric tower by a cover-and-dig top-down method.
Preferably, after the electric tower cover plate is constructed above the new foundation of the electric tower, an electric tower bearing platform is constructed above the electric tower cover plate.
Preferably, the construction of the electric tower bearing platform above the electric tower cover plate specifically comprises: the flange plate is welded on the electric pole of the electric tower, and concrete pouring is carried out after the bearing platform steel bar is connected with the flange plate steel bar, so that the electric tower bearing platform and the electric pole form an integral structure.
Preferably, after the electric tower bearing platform is constructed above the electric tower cover plate, the electric pole of the electric tower is reinforced through a bracing wire.
Preferably, when the open cut frame structure is constructed, the side wall reinforcing steel bars of the cover plate are reserved when the side wall reinforcing steel bars of the frame structure are bound.
Preferably, the roof of the open cut frame structure is waterproofed.
Compared with the prior art, the technical scheme has the following advantages:
the invention provides a underpinning method for a subway open cut area to pass through a non-drainage power transfer tower foundation, which comprises the following steps: constructing a new foundation of the electric tower above the original foundation of the electric tower; constructing an electric tower cover plate above the new foundation of the electric tower; dismantling the original foundation of the electric tower; and constructing an open cut frame structure below the new foundation of the electric tower by a cover-cutting reverse construction method. By the underpinning method, the electric tower does not need to be moved, the moving cost is reduced, the influence of delay of the construction period caused by the change of the electric tower is avoided, the construction efficiency can be improved, and in addition, the safety of the electric tower structure can be ensured during construction without influencing normal power supply.
Drawings
In order to more clearly illustrate the technical solutions of the present invention or the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic flow chart of a method for underpinning a metro open cut section through a non-drainage power tower foundation according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a underpinning structure of a subway open cut section passing through a foundation of a non-drainage power tower according to an embodiment of the present invention.
The reference numbers are as follows:
1-electric pole, 2-stay wire, 3-electric tower bearing platform, 4-electric tower cover plate, 5-new electric tower foundation, 6 as original electric tower foundation, and 7 as frame structure.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
In the following description, specific details are set forth in order to provide a thorough understanding of the present invention. The invention can be implemented in a number of ways different from those described herein and similar generalizations can be made by those skilled in the art without departing from the spirit of the invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.
Referring to fig. 1 and fig. 2, fig. 1 is a schematic flow chart illustrating a method for underpinning a subway open cut section through a non-drainage migrating tower foundation according to an embodiment of the present invention; fig. 2 is a schematic diagram of a underpinning structure of a subway open cut section passing through a foundation of a non-drainage power tower according to an embodiment of the present invention.
The invention provides a underpinning method for a subway open cut section to pass through a non-drainage migrating tower foundation, which comprises the following steps:
s100: and constructing a new foundation 5 of the electric tower above the original foundation 6 of the electric tower. Wherein, the foundation steel bars of the new foundation 5 of the electric tower need to be pre-buried in the side wall or the middle partition wall of the open cut structure, and then the concrete pouring of the new foundation 5 of the electric tower is carried out.
S200: and constructing an electric tower cover plate 4 above the new electric tower foundation 5.
S300: and constructing an electric tower bearing platform 3 above the electric tower cover plate 4. The method specifically comprises the following steps: weld the ring flange on the pole 1 of electricity tower, carry out concrete placement after being connected through cushion cap reinforcing bar and ring flange reinforcing bar to form overall structure with electricity tower cushion cap 3 and pole 1.
S400: the electric pole 1 of the electric tower is reinforced by the guy wires 2. Specifically, a plurality of guys 2 may be provided around the pole 1 to improve the stability of the pole 1.
S500: and (6) dismantling the original foundation 6 of the electric tower.
S600: and constructing an open cut frame structure 7 below the new foundation 5 of the electric tower by a cover-and-dig top-down method. When the open cut frame structure 7 is constructed, the side wall reinforcing steel bars of the cover plate are reserved during the binding of the side wall reinforcing steel bars of the frame structure 7, wherein the reinforcing steel bars can be pre-embedded in the top plate of the frame structure 7 when the side wall is not pre-embedded, and the pre-embedded length and the type of the reinforcing steel bars can be determined through checking calculation according to actual needs. In addition, in order to ensure that the frame structure 7 does not leak, the top plate of the open cut frame structure 7 needs to be waterproofed.
By the underpinning method, the electric tower does not need to be moved, the moving cost is reduced, the influence of delay of the construction period caused by the change of the electric tower is avoided, the construction efficiency can be improved, and in addition, the safety of the electric tower structure can be ensured during construction without influencing normal power supply.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (6)
1. A underpinning method for a subway open cut section to pass through a non-drainage power transfer tower foundation is characterized by comprising the following steps:
constructing a new foundation of the electric tower above the original foundation of the electric tower;
constructing an electric tower cover plate above the new foundation of the electric tower;
dismantling the original foundation of the electric tower;
and constructing an open cut frame structure below the new foundation of the electric tower by a cover-and-dig top-down method.
2. The underpinning method of claim 1 wherein after construction of the electric tower cap over the new foundation of the electric tower, an electric tower cap is constructed over the electric tower cap.
3. The underpinning method of claim 2, wherein constructing an electric tower cap above the electric tower cover plate specifically comprises: the flange plate is welded on the electric pole of the electric tower, and concrete pouring is carried out after the bearing platform steel bar is connected with the flange plate steel bar, so that the electric tower bearing platform and the electric pole form an integral structure.
4. The underpinning method of claim 2, wherein the poles of the electric tower are reinforced by guy wires after construction of the electric tower cap above the electric tower cover plate.
5. The underpinning method of claim 1 wherein during construction of the open cut frame structure, cover plate side wall reinforcements are reserved during binding of frame structure side wall reinforcements.
6. The underpinning method of claim 5 wherein the roof of the open cut frame structure is waterproofed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210209125.XA CN114541461A (en) | 2022-03-03 | 2022-03-03 | Underpinning method for subway open cut area to penetrate through non-drainage power transfer tower foundation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210209125.XA CN114541461A (en) | 2022-03-03 | 2022-03-03 | Underpinning method for subway open cut area to penetrate through non-drainage power transfer tower foundation |
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| Publication Number | Publication Date |
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| CN114541461A true CN114541461A (en) | 2022-05-27 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210209125.XA Pending CN114541461A (en) | 2022-03-03 | 2022-03-03 | Underpinning method for subway open cut area to penetrate through non-drainage power transfer tower foundation |
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| Country | Link |
|---|---|
| CN (1) | CN114541461A (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1257149A (en) * | 1998-12-11 | 2000-06-21 | 北京市第七城市建设工程公司 | Integral foundation underpinning technology for building added floor |
| JP2016089481A (en) * | 2014-11-05 | 2016-05-23 | 大成建設株式会社 | Extension method for underground facility |
| CN107740446A (en) * | 2017-10-16 | 2018-02-27 | 广州地铁设计研究院有限公司 | Combined construction method of the passive supplement in existing building basis with underpining system in hole |
| CN110670615A (en) * | 2019-09-24 | 2020-01-10 | 天津大学 | Subway green construction adjustment method based on limited space |
-
2022
- 2022-03-03 CN CN202210209125.XA patent/CN114541461A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1257149A (en) * | 1998-12-11 | 2000-06-21 | 北京市第七城市建设工程公司 | Integral foundation underpinning technology for building added floor |
| JP2016089481A (en) * | 2014-11-05 | 2016-05-23 | 大成建設株式会社 | Extension method for underground facility |
| CN107740446A (en) * | 2017-10-16 | 2018-02-27 | 广州地铁设计研究院有限公司 | Combined construction method of the passive supplement in existing building basis with underpining system in hole |
| CN110670615A (en) * | 2019-09-24 | 2020-01-10 | 天津大学 | Subway green construction adjustment method based on limited space |
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