CN113738381B - Construction method for pile body at joint of underground excavation station and shield zone - Google Patents
Construction method for pile body at joint of underground excavation station and shield zone Download PDFInfo
- Publication number
- CN113738381B CN113738381B CN202111116977.6A CN202111116977A CN113738381B CN 113738381 B CN113738381 B CN 113738381B CN 202111116977 A CN202111116977 A CN 202111116977A CN 113738381 B CN113738381 B CN 113738381B
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- Prior art keywords
- pile
- shield
- station
- reinforced concrete
- pile body
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- 238000010276 construction Methods 0.000 title claims abstract description 21
- 238000009412 basement excavation Methods 0.000 title claims abstract description 15
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 17
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 9
- 239000002689 soil Substances 0.000 abstract description 6
- 238000005507 spraying Methods 0.000 abstract description 3
- 238000005299 abrasion Methods 0.000 abstract description 2
- 230000003111 delayed effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 230000002411 adverse Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000003365 glass fiber Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH 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
- E21D11/08—Lining with building materials with preformed concrete slabs
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
Abstract
The invention relates to a construction method of a pile body at a joint of a hidden excavation station and a shield zone, which belongs to the technical field of subway station construction and comprises the following steps: s1, constructing a first reinforced concrete pile and a plain pile below a section pipe piece at a tunnel portal; s2, pouring mortar into the upper part of the plain pile to the inverted arch of the transverse channel; s3, shield pile grinding and station entering; s4, digging holes to construct a second reinforced concrete pile above the pipe piece, and then constructing a pile top crown beam. The second-layer transverse channels of the vertical shafts at the two ends of the station can be fully utilized; after the shield passes, the upper pile is constructed for the second time, the shield segment is firmly connected with the upper pile body, and the potential safety hazards such as pile body inclination, unstable pile body and surrounding soil body and the like and quality risk hazards are avoided during the subsequent earth excavation of the station and the inter-pile net hanging anchor spraying construction, and the post-treatment is not needed, so that the construction period is not delayed; the shield pile grinding time is greatly shortened, and meanwhile, the abrasion to a cutter head of a shield machine is also reduced; when the segment near the position is removed, the loosening is not easy to occur.
Description
Technical Field
The invention relates to the technical field of subway station construction, in particular to a pile body construction method at a joint of a underground excavation station and a shield zone.
Background
Subway stations are places for providing railway trains to stop for urban rail transit systems (urban rail systems for short) for carrying goods or taking passengers. The subway station at the present stage does not refer to a station built in an environment below the ground, but refers to a station arranged along the subway system, and the subway station can be built underground, semi-underground or on the ground or on an overhead.
When a subway station is constructed, in order to facilitate shield pile grinding and station passing, a glass fiber reinforced pile is adopted as an end pile at the joint of a station and a tunnel portal in a shield section, and the following problems exist in the current construction method: 1. the transverse clearance size in the transverse channels of the vertical shafts No. 1 and No. 4 of the station is 4m, and the clearance size of the lower part in the transverse channel is reduced to 2.1m after the construction of the crown beam in the transverse channel is finished, so that the utilization rate of the transverse channel is greatly reduced; 2. after the shield passes, the pile body above the shield segment is in a cantilever state, and when the soil excavation of the subsequent station and the inter-pile net hanging anchor spraying construction are carried out, the potential safety hazards such as pile body inclination, unstable pile body and surrounding soil body and the like easily occur, and the post treatment can cause a construction period delay; 3. the time for shield station passing pile grinding is longer; 4. because the pile body is in the cantilever state, the soil body at the top of the segment is unstable, the embedding force between the segment and the surrounding soil body is reduced, and the segment is easy to loosen when the segment near the negative two-layer portal is removed.
In order to avoid the adverse effects, it is necessary to invent a construction method of the pile body at the joint of the station underground excavation station and the shield zone, so as to overcome the defects of the prior art and ensure the stability of the pile body after the shield pile is ground and passes through the station.
Disclosure of Invention
The invention aims to provide a construction method of a pile body at the joint of a hidden excavation station and a shield zone, which aims to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
a construction method of a pile body at the joint of a hidden excavation station and a shield zone comprises the following steps:
s1, constructing a first reinforced concrete pile and a plain pile below a section pipe piece at a tunnel portal;
s2, pouring mortar into the upper part of the plain pile to the inverted arch of the transverse channel;
s3, shield pile grinding and station entering;
s4, digging holes to construct a second reinforced concrete pile above the pipe piece, and then constructing a pile top crown beam.
As a further technical scheme of the invention, the first reinforced concrete pile in the S1 is arranged at the bottom of the plain pile, and an extension pile is arranged at the bottom of the first reinforced concrete pile.
As a further technical scheme of the invention, the mortar in the S2 is M5 mortar.
As a still further technical scheme of the invention, the shield pile grinding in the step S3 comprises a left line shield station crossing and a right line shield station crossing.
Compared with the prior art, the invention has the beneficial effects that:
1. the second layer transverse channels of the vertical shafts at the two ends of the station can be fully utilized;
2. after the shield passes, the upper pile is constructed for the second time, the shield segment is firmly connected with the upper pile body, and the potential safety hazards such as pile body inclination, unstable pile body and surrounding soil body and the like and quality risk hazards are avoided during the subsequent earth excavation of the station and the inter-pile net hanging anchor spraying construction, and the post-treatment is not needed, so that the construction period is not delayed;
3. the shield pile grinding time is greatly shortened, and meanwhile, the abrasion to a cutter head of a shield machine is also reduced;
4. when the segment near the position is removed, the loosening is not easy to occur.
Drawings
FIG. 1 is a process diagram of the invention S1;
FIG. 2 is a process diagram of the invention S2;
FIG. 3 is a process diagram of the invention S3;
fig. 4 is a process diagram of the invention S4.
In the figure: 1-portal, 2-first reinforced concrete pile, 3-plain pile, 4-lengthened section pile, 5-mortar, 61-left line shield station crossing, 62-right line shield station crossing, 7-transverse channel inverted arch, 8-second reinforced concrete pile and 9-pile crown beam.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
The embodiment of the invention is realized in such a way that the construction method of the pile body at the joint of the underground excavation station and the shield zone shown in figures 1-4 comprises the following steps:
s1, constructing a first reinforced concrete pile 2 and a plain pile 3 below a section pipe piece at a tunnel portal 1;
s2, pouring M5 mortar 5 at the upper part of the plain pile 3 to a transverse channel inverted arch 7 (a pile top crown beam is not constructed temporarily);
s3, shield pile grinding and station entering, specifically a left line shield station passing 61 and a right line shield station passing 62;
s4, digging a hole to construct a second reinforced concrete pile 8 above the pipe piece, and then constructing a pile top crown beam 9.
In practical application, the pile length is shortened after adjustment, so that the pile body below the shield segment, namely the first reinforced concrete pile 2 and the plain pile 3, is firstly manufactured stably, and the lengthened section pile 4 at the lower part of the first reinforced concrete pile is also reinforced concrete, and the optimized length of the lengthened section pile 4 is 2m; considering the possible errors generated when the diameter of the shield excavation is 6.16m and the shield machine is tunneled to the station end pile, the length range of the plain pile 3 is as follows: 200mm below the lowest point of connection between the bottom of the element pile 3 and the outer wall of the duct piece, and 200mm above the highest point of connection between the top of the element pile 3 and the outer wall of the duct piece, so that the element pile 3 and the upper square pipe piece are tightly combined after shield pile grinding, and the support is stable.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Furthermore, it should be understood that although the present disclosure describes embodiments, not every embodiment is provided with a separate embodiment, and that this description is provided for clarity only, and that the disclosure is not limited to the embodiments described in detail below, and that the embodiments described in the examples may be combined as appropriate to form other embodiments that will be apparent to those skilled in the art.
Claims (3)
1. The construction method of the pile body at the joint of the underground excavation station and the shield zone is characterized by comprising the following steps:
s1, constructing a first reinforced concrete pile and a plain pile below a section pipe piece at a tunnel portal;
s2, pouring mortar into the upper part of the plain pile to the inverted arch of the transverse channel;
s3, shield pile grinding and station entering;
s4, digging a hole to construct a second reinforced concrete pile above the pipe piece, and then constructing a pile top crown beam;
in S1, a first reinforced concrete pile is arranged at the bottom of the plain pile, and an extension pile is arranged at the bottom of the first reinforced concrete pile.
2. The construction method of the pile body at the joint of the underground excavation station and the shield section according to claim 1, wherein the mortar in the step S2 is M5 mortar.
3. The construction method of the pile body at the joint of the underground excavation station and the shield section according to claim 1, wherein the shield pile grinding in the step S3 comprises left line shield station crossing and right line shield station crossing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111116977.6A CN113738381B (en) | 2021-09-23 | 2021-09-23 | Construction method for pile body at joint of underground excavation station and shield zone |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111116977.6A CN113738381B (en) | 2021-09-23 | 2021-09-23 | Construction method for pile body at joint of underground excavation station and shield zone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN113738381A CN113738381A (en) | 2021-12-03 |
| CN113738381B true CN113738381B (en) | 2023-11-14 |
Family
ID=78740530
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111116977.6A Active CN113738381B (en) | 2021-09-23 | 2021-09-23 | Construction method for pile body at joint of underground excavation station and shield zone |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113738381B (en) |
Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101086209A (en) * | 2007-07-23 | 2007-12-12 | 北京交通大学 | Shield tunneling and shallow tunneling combined construction method for building underground station |
| CN201241335Y (en) * | 2008-07-01 | 2009-05-20 | 北京住总集团有限责任公司 | Pile and post in one foundation structure of underground engineering |
| CN204551452U (en) * | 2015-04-17 | 2015-08-12 | 上海三凯建设管理咨询有限公司 | A kind of composite pile improving bearing capacity of foundation soil |
| CN105003272A (en) * | 2015-07-26 | 2015-10-28 | 北京工业大学 | Reversed construction method for expanding and excavating stations on sectional shield tunnel foundations of subways |
| CN106050244A (en) * | 2016-08-01 | 2016-10-26 | 中铁第勘察设计院集团有限公司 | Water-rich sand-cobble stratum shield entry and exit reinforcing system and construction method thereof |
| CN106968690A (en) * | 2017-04-20 | 2017-07-21 | 中冶建工集团有限公司 | The method for tunnel construction for soil property of caving in |
| CN106988753A (en) * | 2017-05-08 | 2017-07-28 | 中建三局基础设施工程有限公司 | A kind of U-shaped plain concrete ground-connecting-wall adds steel bushing shield structure and its method of reseptance |
| CN107575237A (en) * | 2017-08-23 | 2018-01-12 | 广州地铁设计研究院有限公司 | A kind of subsurface excavation method is combined the construction method of construction subway station with shield method |
| CN109707415A (en) * | 2018-11-21 | 2019-05-03 | 广州地铁设计研究院股份有限公司 | A kind of joint construction method and its joint structure of Shield-bored tunnels and station |
| CN109706909A (en) * | 2019-02-21 | 2019-05-03 | 郑州市市政工程总公司 | The structures foundation reinforcing structure and its construction method worn under reply metro shield |
| CN109797665A (en) * | 2019-01-29 | 2019-05-24 | 北京城建设计发展集团股份有限公司 | Statically indeterminate structure bridge pile foundation actively underpins top lift determination and displacement control method |
| CN111396061A (en) * | 2020-03-24 | 2020-07-10 | 西安建筑科技大学 | Shield construction method, construction working face thereof and mixed pile body in working face |
| CN112411614A (en) * | 2020-11-17 | 2021-02-26 | 中铁第四勘察设计院集团有限公司 | Connecting structure capable of transferring force across existing component, reinforcing structure and construction method |
| CN112983446A (en) * | 2021-04-22 | 2021-06-18 | 中铁一局集团第二工程有限公司 | Construction method for shield cutting of existing station reinforced concrete fender post |
-
2021
- 2021-09-23 CN CN202111116977.6A patent/CN113738381B/en active Active
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101086209A (en) * | 2007-07-23 | 2007-12-12 | 北京交通大学 | Shield tunneling and shallow tunneling combined construction method for building underground station |
| CN201241335Y (en) * | 2008-07-01 | 2009-05-20 | 北京住总集团有限责任公司 | Pile and post in one foundation structure of underground engineering |
| CN204551452U (en) * | 2015-04-17 | 2015-08-12 | 上海三凯建设管理咨询有限公司 | A kind of composite pile improving bearing capacity of foundation soil |
| CN105003272A (en) * | 2015-07-26 | 2015-10-28 | 北京工业大学 | Reversed construction method for expanding and excavating stations on sectional shield tunnel foundations of subways |
| CN106050244A (en) * | 2016-08-01 | 2016-10-26 | 中铁第勘察设计院集团有限公司 | Water-rich sand-cobble stratum shield entry and exit reinforcing system and construction method thereof |
| CN106968690A (en) * | 2017-04-20 | 2017-07-21 | 中冶建工集团有限公司 | The method for tunnel construction for soil property of caving in |
| CN106988753A (en) * | 2017-05-08 | 2017-07-28 | 中建三局基础设施工程有限公司 | A kind of U-shaped plain concrete ground-connecting-wall adds steel bushing shield structure and its method of reseptance |
| CN107575237A (en) * | 2017-08-23 | 2018-01-12 | 广州地铁设计研究院有限公司 | A kind of subsurface excavation method is combined the construction method of construction subway station with shield method |
| CN109707415A (en) * | 2018-11-21 | 2019-05-03 | 广州地铁设计研究院股份有限公司 | A kind of joint construction method and its joint structure of Shield-bored tunnels and station |
| CN109797665A (en) * | 2019-01-29 | 2019-05-24 | 北京城建设计发展集团股份有限公司 | Statically indeterminate structure bridge pile foundation actively underpins top lift determination and displacement control method |
| CN109706909A (en) * | 2019-02-21 | 2019-05-03 | 郑州市市政工程总公司 | The structures foundation reinforcing structure and its construction method worn under reply metro shield |
| CN111396061A (en) * | 2020-03-24 | 2020-07-10 | 西安建筑科技大学 | Shield construction method, construction working face thereof and mixed pile body in working face |
| CN112411614A (en) * | 2020-11-17 | 2021-02-26 | 中铁第四勘察设计院集团有限公司 | Connecting structure capable of transferring force across existing component, reinforcing structure and construction method |
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| Publication number | Publication date |
|---|---|
| CN113738381A (en) | 2021-12-03 |
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