CN107100650B - Rectangular steel pipe curtain foot connecting structure and construction method thereof - Google Patents
Rectangular steel pipe curtain foot connecting structure and construction method thereof Download PDFInfo
- Publication number
- CN107100650B CN107100650B CN201710370630.1A CN201710370630A CN107100650B CN 107100650 B CN107100650 B CN 107100650B CN 201710370630 A CN201710370630 A CN 201710370630A CN 107100650 B CN107100650 B CN 107100650B
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 86
- 239000010959 steel Substances 0.000 title claims abstract description 86
- 238000010276 construction Methods 0.000 title claims abstract description 34
- 230000008093 supporting effect Effects 0.000 claims description 9
- 238000000034 method Methods 0.000 claims description 7
- 238000003466 welding Methods 0.000 claims description 6
- 238000009415 formwork Methods 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 2
- 230000002787 reinforcement Effects 0.000 claims description 2
- 238000009412 basement excavation Methods 0.000 description 6
- 230000003014 reinforcing effect Effects 0.000 description 4
- 238000007689 inspection Methods 0.000 description 2
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000474 nursing effect Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/14—Lining predominantly with metal
- E21D11/15—Plate linings; Laggings, i.e. linings designed for holding back formation material or for transmitting the load to main supporting members
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/10—Lining with building materials with concrete cast in situ; Shuttering also lost shutterings, e.g. made of blocks, of metal plates or other equipment adapted therefor
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention provides a rectangular steel pipe curtain foot connecting structure and a construction method thereof, wherein the rectangular steel pipe curtain foot connecting structure comprises an L-shaped foundation arranged in a pilot tunnel, a vertical steel pipe arranged outside the pilot tunnel and two rows of vertical bolts used for connecting the vertical steel pipe and the L-shaped foundation, two rows of bolt holes corresponding to the vertical bolts are formed in one surface of the vertical steel pipe, facing the L-shaped foundation, of the vertical steel pipe, one end of each vertical bolt penetrates through the bolt hole in the vertical steel pipe, and the other end of each vertical bolt is connected with the L-shaped foundation through an embedded bar. The invention has simple structure, is convenient for construction, reduces the jacking quantity of the vertical pipe curtains, greatly reduces the construction period, and can be suitable for the basic forms of various pipe curtain construction methods; the L-shaped foundation form can be perfectly matched with the later-stage main body structure, so that the space utilization rate is increased, the construction is convenient, and the economic benefit is improved.
Description
Technical Field
The invention relates to a subway underground excavation station taking a pipe curtain structure as a supporting structure, and mainly relates to a structure of a foot foundation of the pipe curtain structure and a connecting method of the pipe curtain structure and the foundation.
Background
In recent years, urban underground engineering construction is entering the golden period. With the progress of technology, the concept and mode of the branch nursing used for excavation are gradually changed. The excavation under the pipe curtain supporting mode has small influence on the ground surface and the surrounding environment, and the pipe curtain construction method can play a role in blocking water to a certain extent. Therefore, a plurality of construction or established projects in China are constructed in a pipe curtain supporting mode. The general pipe curtain structure is a semi-closed arch structure, and the structure has better stress performance, but has smaller space utilization rate, so that a rectangular pipe curtain structure with a flat top form appears. In order to ensure that the pipe curtain structure does not sink integrally when soil below the pipe curtain is excavated, the feet of the pipe curtain structure are reinforced, and a plurality of steel pipes are often connected side by side to increase the bearing capacity of the feet of the pipe curtain structure, as shown in fig. 1. However, the reinforcing mode needs to increase the number of the jacking pipes, prolongs the construction period, is difficult to control the jacking precision in the jacking pipe construction process, and can reduce the reinforcing effect of the end part of the pipe curtain if the deviation is large and the connection of the adjacent steel pipes is difficult, so that the whole sinking of the pipe curtain structure is caused, and the supporting effect of the pipe curtain structure is influenced.
Disclosure of Invention
The connecting structure and the construction method provided by the invention are convenient for construction, can effectively strengthen the foot part of the pipe curtain structure, have more obvious strengthening effect, are combined with the construction of the side wall and the bottom plate of the later-stage station, and optimize the construction steps.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a rectangular steel pipe curtain foot connection structure, is including arranging the L type basis in the pilot tunnel in, being located the outer vertical steel pipe of pilot tunnel to and be used for connecting two rows of vertical bolts of vertical steel pipe and L type basis, two rows of bolt holes that correspond with vertical bolt have been seted up on the one side of vertical steel pipe towards L type basis, bolt hole on the vertical steel pipe is passed to vertical bolt one end, and the other end passes through embedded bar and is connected with L type basis.
And a small-diameter steel pipe is vertically arranged in the area between the vertical steel pipe and the L-shaped foundation, and the small-diameter steel pipe is used for penetrating through the vertical bolt.
The vertical bolts and the embedded bars are welded in the small-diameter steel pipe.
The invention also provides a construction method of the rectangular steel pipe curtain foot connecting structure, which comprises the following steps:
1) Firstly, constructing a pilot tunnel below a pipe curtain by adopting a step method, excavating while supporting until the pilot tunnel is penetrated along the axial direction of the pipe curtain, and pre-burying small-diameter steel pipes in a pre-excavated primary support according to the intervals of bolt holes of vertical steel pipes during pilot tunnel construction;
2) Then constructing the L-shaped foundation, arranging embedded bars at the top of the steel skeleton when the steel skeleton starts to be bound, randomly adjusting the embedded bars according to the hole positions of the small-diameter steel pipes embedded in the pilot tunnel when the steel skeleton is embedded, and ensuring that the embedded bars and the steel skeleton are on the same central line;
3) Jacking a vertical steel pipe;
4) After the jacking pipe is completed, the vertical bolts penetrate downwards from the bolt holes, so that the welding between the small-diameter steel pipes and embedded bars of the L-shaped foundation can be ensured under the condition that the pilot tunnel support is not required to be broken;
5) After the welding of the vertical bolts and the embedded bars is finished, the formwork is supported at the joint, the concrete is integrally poured, and the whole pipe curtain structure and the foot reinforcement construction are finished.
According to the technical scheme, the vertical pipe curtain jacking device is simple in structure, convenient to construct, capable of reducing the jacking quantity of vertical pipe curtains, greatly reducing the construction period, and applicable to basic forms of various pipe curtain construction methods; the L-shaped foundation form can be perfectly matched with the later-stage main body structure, so that the space utilization rate is increased, the construction is convenient, and the economic benefit is improved.
Drawings
FIG. 1 is a schematic view of a rectangular steel tube curtain foot connection structure of the present invention;
FIG. 2 is a sectional view of a station using the rectangular tube curtain foot connecting structure of the present invention;
fig. 3 is a top view of a vertical steel pipe according to the present invention.
Detailed Description
A preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.
As shown in fig. 2, the rectangular steel pipe curtain foot connecting structure 10 is a part of a pipe curtain support, is used for reinforcing the foot of the pipe curtain structure, perfectly fits with the later main structure 20, increases the space utilization and facilitates construction.
As shown in fig. 1 and 3, the rectangular steel pipe curtain foot connecting structure 10 includes an L-shaped foundation 30 and a vertical steel pipe 40, the L-shaped foundation is placed inside a guide hole 70 which is dug in the dark, the vertical steel pipe is placed outside the guide hole, two rows of bolt holes 41 are formed in one side of the vertical steel pipe facing the guide hole, and the vertical steel pipe and the L-shaped foundation are fixedly connected through vertical bolts 50.
One end of the vertical bolt 50 passes through the bolt hole 41 on the vertical steel pipe, and the other end is connected with the L-shaped foundation 30 through the embedded steel bar 31. The region between the vertical steel pipe and the L-shaped foundation is vertically provided with a small-diameter steel pipe 60 which is used for penetrating through the vertical bolt, so that the vertical bolt and the embedded steel bar are welded in the small-diameter steel pipe.
The concrete method for the rectangular steel pipe curtain foot connecting structure to be used for pipe curtain structure construction is as follows:
1. firstly, constructing a pilot tunnel 70 below the pipe curtain by adopting a step method, and supporting while excavating until the pilot tunnel is penetrated along the axial direction of the pipe curtain. And according to the interval of the bolt holes of the vertical steel pipes during pilot tunnel construction, the small-diameter steel pipes 60 with phi 45@150 are pre-buried in the pre-buried primary support, the plastic adhesive tapes are adopted at the two ends before pre-burying to block and prevent concrete from entering, and the grids are adopted to fix, so that the small-diameter steel pipes are prevented from shifting during concrete spraying.
2. Construction is carried out on an L-shaped foundation, an embedded steel bar 31 is arranged at the top of the reinforced steel bar framework when the reinforced steel bar framework starts to be bound, the embedded length is 35d, the exposed length is larger than 32d, random adjustment is carried out according to the hole position of the small-diameter steel tube on the underground excavation pilot tunnel when embedded, and the embedded steel bar framework are ensured to be on the same central line so as to be connected subsequently. And after the steel skeleton lap joint is completed, supporting the mould and pouring concrete.
3. In the jacking process of the steel pipe, the control of the precision is important when the vertical steel pipe connected in the underground excavation pilot tunnel is jacked, the direction of the upper jacking pipe is influenced, the connection with an L-shaped foundation is influenced, the measurement is carried out continuously during construction, the correction is timely carried out, the upper and lower hole positions of the vertical steel pipe are strived for, and the bolt holes of the vertical steel pipe are communicated with the upper and lower connecting holes of the small-diameter steel pipe.
4. After the pipe jacking is completed, the vertical bolts 50 penetrate downwards from the bolt holes 41, so that the embedded steel pipes 60 with small diameters can be welded with embedded steel bars 31 of the L-shaped foundation through underground excavation under the condition that pilot tunnel support is not required to be broken, and the welding length is not less than 10d.
5. After the welding of the vertical bolts and the embedded bars is finished, quality inspection is carried out, after the inspection is qualified, the formwork is supported at the joint, the concrete is integrally poured, and the whole pipe curtain structure and foot reinforcing construction are finished.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the scope of the present invention, and various modifications and improvements made by those skilled in the art to the technical solution of the present invention should fall within the scope of protection defined by the claims of the present invention without departing from the spirit of the present invention.
Claims (3)
1. A construction method of a rectangular steel pipe curtain foot connecting structure is characterized in that,
the rectangular steel pipe curtain foot connecting structure comprises an L-shaped foundation arranged in a pilot tunnel, a vertical steel pipe arranged outside the pilot tunnel and two rows of vertical bolts used for connecting the vertical steel pipe and the L-shaped foundation, wherein two rows of bolt holes corresponding to the vertical bolts are formed in one face of the vertical steel pipe, facing the L-shaped foundation, of each vertical steel pipe, one end of each vertical bolt penetrates through the bolt hole in the vertical steel pipe, and the other end of each vertical bolt is connected with the L-shaped foundation through an embedded steel bar; a small-diameter steel pipe is vertically arranged in the area between the vertical steel pipe and the L-shaped foundation and is used for penetrating through a vertical bolt, and the vertical bolt and the embedded steel bar are welded in the small-diameter steel pipe;
the construction method comprises the following steps:
1) Firstly, constructing a pilot tunnel below a pipe curtain by adopting a step method, excavating while supporting until the pilot tunnel is penetrated along the axial direction of the pipe curtain, and pre-burying small-diameter steel pipes in a pre-excavated primary support according to the intervals of bolt holes of vertical steel pipes during pilot tunnel construction;
2) Then constructing an L-shaped foundation, arranging embedded bars at the top of the L-shaped foundation when the steel skeleton starts to be bound, randomly adjusting the embedded bars according to the hole positions of the small-diameter steel pipes embedded in the pilot tunnel when the embedded bars are embedded, ensuring that the embedded bars and the steel skeleton are on the same central line, and supporting a mold to pour concrete after the steel skeleton is overlapped;
3) Jacking a vertical steel pipe;
4) After the jacking pipe is completed, the vertical bolts penetrate downwards from the bolt holes, so that the welding between the small-diameter steel pipes and embedded bars of the L-shaped foundation can be ensured under the condition that the pilot tunnel support is not required to be broken;
5) After the welding of the vertical bolts and the embedded bars is finished, the formwork is supported at the joint, the concrete is integrally poured, and the whole pipe curtain structure and the foot reinforcement construction are finished.
2. The construction method according to claim 1, wherein in step 1), both ends of the small-diameter steel pipe before embedding are plugged with plastic tapes to prevent concrete from entering, and are fixed with a grid.
3. The construction method according to claim 1, wherein the measurement is performed continuously and the correction is performed in time during the jacking of the vertical steel pipe, so that the level of the upper and lower hole positions of the vertical steel pipe is ensured, and the bolt holes of the vertical steel pipe are communicated with the upper and lower connecting holes of the small-diameter steel pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710370630.1A CN107100650B (en) | 2017-05-23 | 2017-05-23 | Rectangular steel pipe curtain foot connecting structure and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710370630.1A CN107100650B (en) | 2017-05-23 | 2017-05-23 | Rectangular steel pipe curtain foot connecting structure and construction method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107100650A CN107100650A (en) | 2017-08-29 |
| CN107100650B true CN107100650B (en) | 2023-09-26 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710370630.1A Active CN107100650B (en) | 2017-05-23 | 2017-05-23 | Rectangular steel pipe curtain foot connecting structure and construction method thereof |
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| Country | Link |
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| CN (1) | CN107100650B (en) |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007332638A (en) * | 2006-06-14 | 2007-12-27 | Ohbayashi Corp | Underground space construction method, underground space constructed in the method, and underground structure constructed in the method |
| CN101285385A (en) * | 2008-05-29 | 2008-10-15 | 中交第二公路勘察设计研究院有限公司 | Undermining method for three-dimensional pipe-roof |
| CN102704957A (en) * | 2012-05-11 | 2012-10-03 | 北京工业大学 | Shed-frame method for shallowly burying large-sized underground structure construction |
| CN103321659A (en) * | 2013-07-22 | 2013-09-25 | 中铁隧道集团有限公司 | Large-diameter tube curtain support underground excavation construction super-shallow burying large-section subway station structure and construction method |
| CN104453948A (en) * | 2014-12-01 | 2015-03-25 | 中铁隆工程集团有限公司 | Vertical prestress steel pipe supporting structure for large-section subsurface tunnel and construction process |
| CN205225281U (en) * | 2015-12-14 | 2016-05-11 | 中建六局土木工程有限公司 | For a short time, it secretly digs section support construction structures than super shallow rectangle that buries to cover to stride |
| CN105888703A (en) * | 2016-06-03 | 2016-08-24 | 北京城建设计发展集团股份有限公司 | Method for constructing super-shallow-burial subway station under transverse canopy erected inside micro pilot tunnel |
| CN106089243A (en) * | 2016-06-12 | 2016-11-09 | 东北大学 | A kind of pipe curtain supporting construction connected based on concrete filled steel tube |
| CN206957743U (en) * | 2017-05-23 | 2018-02-02 | 中铁四局集团第五工程有限公司 | A kind of rectangular steel pipe curtain foot attachment structure |
-
2017
- 2017-05-23 CN CN201710370630.1A patent/CN107100650B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007332638A (en) * | 2006-06-14 | 2007-12-27 | Ohbayashi Corp | Underground space construction method, underground space constructed in the method, and underground structure constructed in the method |
| CN101285385A (en) * | 2008-05-29 | 2008-10-15 | 中交第二公路勘察设计研究院有限公司 | Undermining method for three-dimensional pipe-roof |
| CN102704957A (en) * | 2012-05-11 | 2012-10-03 | 北京工业大学 | Shed-frame method for shallowly burying large-sized underground structure construction |
| CN103321659A (en) * | 2013-07-22 | 2013-09-25 | 中铁隧道集团有限公司 | Large-diameter tube curtain support underground excavation construction super-shallow burying large-section subway station structure and construction method |
| CN104453948A (en) * | 2014-12-01 | 2015-03-25 | 中铁隆工程集团有限公司 | Vertical prestress steel pipe supporting structure for large-section subsurface tunnel and construction process |
| CN205225281U (en) * | 2015-12-14 | 2016-05-11 | 中建六局土木工程有限公司 | For a short time, it secretly digs section support construction structures than super shallow rectangle that buries to cover to stride |
| CN105888703A (en) * | 2016-06-03 | 2016-08-24 | 北京城建设计发展集团股份有限公司 | Method for constructing super-shallow-burial subway station under transverse canopy erected inside micro pilot tunnel |
| CN106089243A (en) * | 2016-06-12 | 2016-11-09 | 东北大学 | A kind of pipe curtain supporting construction connected based on concrete filled steel tube |
| CN206957743U (en) * | 2017-05-23 | 2018-02-02 | 中铁四局集团第五工程有限公司 | A kind of rectangular steel pipe curtain foot attachment structure |
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| CN107100650A (en) | 2017-08-29 |
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