CN112144517A - Method for grouting retaining wall by using steel retaining cylinder for pile foundation in weak stratum - Google Patents
Method for grouting retaining wall by using steel retaining cylinder for pile foundation in weak stratum Download PDFInfo
- Publication number
- CN112144517A CN112144517A CN202011108302.2A CN202011108302A CN112144517A CN 112144517 A CN112144517 A CN 112144517A CN 202011108302 A CN202011108302 A CN 202011108302A CN 112144517 A CN112144517 A CN 112144517A
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- Prior art keywords
- grouting
- pile foundation
- grout
- steel
- steel casing
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 50
- 239000010959 steel Substances 0.000 title claims abstract description 50
- 238000000034 method Methods 0.000 title claims abstract description 18
- 239000011440 grout Substances 0.000 claims abstract description 30
- 238000010276 construction Methods 0.000 claims abstract description 12
- 239000002002 slurry Substances 0.000 claims description 15
- 230000001681 protective effect Effects 0.000 abstract 1
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 4
- 235000017491 Bambusa tulda Nutrition 0.000 description 4
- 241001330002 Bambuseae Species 0.000 description 4
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 4
- 239000011425 bamboo Substances 0.000 description 4
- 239000004576 sand Substances 0.000 description 4
- 239000004927 clay Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
-
- 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
- E02D27/12—Pile foundations
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/66—Mould-pipes or other moulds
- E02D5/665—Mould-pipes or other moulds for making piles
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D9/00—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof
- E02D9/02—Removing sheet piles bulkheads, piles, mould-pipes or other moulds or parts thereof by withdrawing
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- 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)
- General Engineering & Computer Science (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention belongs to the technical field of building engineering, and relates to a method for grouting a retaining wall by using a steel retaining cylinder for a pile foundation in a weak stratum. The method for grouting the retaining wall of the pile foundation in the weak stratum by using the steel retaining cylinder comprises the following steps of arranging grouting pipes on the outer wall of the processed steel retaining cylinder at equal intervals along the circumference, wherein an upper layer of grout overflow holes and a lower layer of grout overflow holes are arranged on each grouting pipe; after the steel casing provided with the grouting pipe is installed on a hard plastic stratum, grouting is performed on a top grouting opening, grouting pressure is adjusted according to the thickness of a soft stratum, and grouting with certain thickness is performed according to the wall of a grouting hole, wherein the grouting flows out through a bottom grouting opening at first and then sequentially flows out through each layer of grout overflow holes from bottom to top; after grouting, pulling out the steel casing, and slowly performing the pulling-out process to make grout be refilled and fill gaps of the steel casing until the grout is completely pulled out, so that the grout at the position of the original steel casing reaches the strength and forms a grout protective wall with certain strength; and then carrying out pile foundation construction according to the conventional pile foundation. The invention reduces the construction cost and improves the working efficiency.
Description
Technical Field
The invention belongs to the technical field of building engineering, and particularly relates to a method for grouting a retaining wall by using a steel retaining cylinder for a pile foundation in a weak stratum.
Background
The geology of coastal areas of China, particularly in the plain areas of Changtriangle lake areas, is complex, mainly comprises soft plastic clay, silty fine sand and fine sand stratums, and has wide distribution, large thickness and very common water area development; the most conventional economic way is pile foundation perfusion pile foundation system under this kind of geology condition, it is very thick regional stake to mould clay, fine sand powder, fine sand stratum in soft, generally take the deep steel to protect a section of thick bamboo and pass the weak stratum and get into the hard stratum of moulding, carry out pile foundation pore-forming and pour into, in order to avoid the dark soft layer pile foundation in top to appear quality defect, the steel protects a section of thick bamboo and generally not pull out, the pile foundation construction finishes, it buries underground to protect a section of thick bamboo, can't retrieve and recycle, use more steel, it is huge that the steel protects a section of thick bamboo and occupy the cost in the pile foundation.
Disclosure of Invention
The invention aims to provide a method for grouting a retaining wall of a pile foundation in a weak stratum by using a steel retaining cylinder, so that the steel retaining cylinder is pulled out before drilling the pile foundation on the premise of ensuring the quality of a pile body, the construction cost is reduced, and the working efficiency is improved.
The invention adopts the following technical scheme for achieving the purpose:
a method for grouting a retaining wall of a weak stratum pile foundation by using a steel retaining cylinder comprises the following steps:
1) arranging grouting pipes at equal intervals along the circumference on the outer wall of the processed steel casing, wherein the diameters phi of the grouting pipes are 20-100 mm; the wall thickness is 3-10 mm, the bottom of the grouting pipe is flush with the bottom of the steel casing, and the top of the grouting pipe is provided with a communicating pipe; the tops of the plurality of grouting pipes are communicated with each other through communicating pipes; the upper layer and the lower layer of the grout overflow holes are arranged on each grouting pipe, and the grout overflow holes of two adjacent layers are arranged in a staggered manner;
2) after the steel casing provided with the grouting pipe is installed to a hard plastic stratum under the coordination of a vibration hammer, grouting slurry is pressed and injected into a top grouting opening, the grouting pressure is adjusted to be 0.1-0.5mpa according to the thickness of a soft stratum, the slurry with a certain thickness is pressed and injected into the wall of a grouting hole, and the slurry flows out through a bottom grout outlet and the upper and lower grout overflow holes;
3) after grouting, pulling out the steel casing, slowly performing grout refilling to fill gaps of the steel casing in the pulling-out process until the grout is completely pulled out, and then using the steel casing for construction of the next pile foundation;
4) after 7-15 days, the slurry at the position of the original steel casing reaches the strength to form a slurry retaining wall with certain strength; and then carrying out pile foundation construction according to the conventional pile foundation.
The distance between the pulp overflowing holes of the two adjacent layers is 200-600 mm.
The method for grouting the retaining wall of the pile foundation in the soft stratum by using the steel retaining cylinder provided by the invention has the advantages that the structural design that the grouting pipe is welded on the outer wall surface of the steel retaining cylinder is utilized, the grout is gradually overflowed through the grouting pipe and the grout overflow hole in the grouting pipe, and after the steel retaining cylinder is pulled out, the grout is filled in the gap of the steel retaining cylinder to form the grout retaining wall, so that the construction cost is reduced, and the working efficiency is improved.
Drawings
FIG. 1 is a top view of the steel casing according to the present invention.
Fig. 2 is a half-sectional development view of the steel casing of the present invention.
In the figure: 1. a steel casing, 2, a grouting pipe, 3 and a grout overflow hole.
Detailed Description
The invention is described in detail with reference to the accompanying drawings and specific embodiments:
as shown in fig. 1 and 2, a method for grouting a retaining wall by using a steel casing for a weak stratum pile foundation comprises the following steps:
1) arranging grouting pipes 2 at equal intervals along the circumference on the outer wall of the processed steel casing 1, wherein the diameter phi of each grouting pipe 2 is 20-100 mm; the wall thickness is 3-10 mm, the bottom of the grouting pipe 2 is flush with the bottom of the steel casing 1, and a communicating pipe is arranged at the top of the grouting pipe 2; the tops of the grouting pipes 2 are communicated with each other through a communicating pipe; the upper layer and the lower layer of the grout overflow holes 3 are arranged on each grouting pipe 2, and the adjacent two layers of the grout overflow holes 3 are arranged in a staggered manner;
1) after the steel casing 1 provided with the grouting pipe 2 is installed to a hard plastic stratum under the coordination of a vibration hammer, grouting slurry is pressed and injected into a top grouting opening, the grouting pressure is adjusted to be 0.1-0.5mpa according to the thickness of a soft stratum, the slurry with a certain thickness is pressed and injected into the wall of a grouting hole, and the slurry flows out through a bottom grout outlet and the upper and lower grout overflow holes;
3) after grouting, pulling out the steel casing, slowly performing grout refilling to fill gaps of the steel casing in the pulling-out process until the grout is completely pulled out, and then using the steel casing for construction of the next pile foundation;
4) after 7-15 days, the slurry at the position of the original steel casing reaches the strength to form a slurry retaining wall with certain strength; and then carrying out pile foundation construction according to the conventional pile foundation.
In this embodiment, the manufacturing of the steel casing and the subsequent construction of the pile foundation are mature technologies and techniques in the prior art, and will not be described herein.
Claims (3)
1. A method for grouting a retaining wall by using a steel retaining cylinder for a pile foundation of a weak stratum is characterized by comprising the following steps of: the method comprises the following steps:
1) arranging grouting pipes at equal intervals along the circumference on the outer wall of the processed steel casing, wherein the bottoms of the grouting pipes are flush with the bottom of the steel casing, and the top of each grouting pipe is provided with a communicating pipe; the tops of the plurality of grouting pipes are communicated with each other through communicating pipes; the upper layer and the lower layer of the grout overflow holes are arranged on each grouting pipe, and the grout overflow holes of two adjacent layers are arranged in a staggered manner;
2) after the steel casing provided with the grouting pipe is installed to a hard plastic stratum under the coordination of a vibration hammer, grouting slurry is pressed and injected into a top grouting opening, the grouting pressure is adjusted to be 0.1-0.5mpa according to the thickness of a soft stratum, the slurry with a certain thickness is pressed and injected into the wall of a grouting hole, and the slurry flows out through a bottom grout outlet and the upper and lower grout overflow holes;
3) after grouting, pulling out the steel casing, slowly performing grout refilling to fill gaps of the steel casing in the pulling-out process until the grout is completely pulled out, and then using the steel casing for construction of the next pile foundation;
4) after 7-15 days, the slurry at the position of the original steel casing reaches the strength to form a slurry retaining wall with certain strength; and then carrying out pile foundation construction according to the conventional pile foundation.
2. The method for grouting the retaining wall of the weak stratum pile foundation by using the steel retaining cylinder according to claim 1, characterized by comprising the following steps of: the distance between the pulp overflowing holes of the two adjacent layers is 200-600 mm.
3. The method for grouting the retaining wall of the weak stratum pile foundation by using the steel retaining cylinder according to claim 1, characterized by comprising the following steps of: the diameter phi of the grouting pipe is 20-100 mm; the wall thickness is 3-10 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011108302.2A CN112144517A (en) | 2020-10-16 | 2020-10-16 | Method for grouting retaining wall by using steel retaining cylinder for pile foundation in weak stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011108302.2A CN112144517A (en) | 2020-10-16 | 2020-10-16 | Method for grouting retaining wall by using steel retaining cylinder for pile foundation in weak stratum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112144517A true CN112144517A (en) | 2020-12-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011108302.2A Pending CN112144517A (en) | 2020-10-16 | 2020-10-16 | Method for grouting retaining wall by using steel retaining cylinder for pile foundation in weak stratum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112144517A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113756293A (en) * | 2021-09-26 | 2021-12-07 | 北京首钢国际工程技术有限公司 | Post-grouting cast-in-place pile suitable for strongly corrosive geological conditions and construction method thereof |
| CN113882398A (en) * | 2021-10-12 | 2022-01-04 | 中铁七局集团郑州工程有限公司 | Grouting reinforcement construction method for pile foundation casing of water-rich sand gravel soil layer |
| CN114016500A (en) * | 2021-11-10 | 2022-02-08 | 中国建筑第四工程局有限公司 | Steel casing cast-in-situ bored pile advanced reinforcement construction method in sensitive environment |
| CN114753361A (en) * | 2022-04-29 | 2022-07-15 | 深圳市交通公用设施建设中心 | Pile foundation steel casing capable of controlling stratum deformation and construction method thereof |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001090060A (en) * | 1999-09-17 | 2001-04-03 | Shoowa Kensho:Kk | Driving method for pile and constructing method for cut- off wall using the method |
| US20100232887A1 (en) * | 2009-03-13 | 2010-09-16 | University Of Kansas | Breakaway casing connection |
| CN110230309A (en) * | 2019-01-24 | 2019-09-13 | 中建新疆建工土木工程有限公司 | Karst region bridge solution cavity pile base construction method |
| CN111636419A (en) * | 2020-07-02 | 2020-09-08 | 湖南科技学院 | Construction equipment and construction method for grouting thin-wall tubular pile |
| CN111764404A (en) * | 2020-07-22 | 2020-10-13 | 湖南科技学院 | Partially recyclable secant pile supporting structure and construction method |
-
2020
- 2020-10-16 CN CN202011108302.2A patent/CN112144517A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001090060A (en) * | 1999-09-17 | 2001-04-03 | Shoowa Kensho:Kk | Driving method for pile and constructing method for cut- off wall using the method |
| US20100232887A1 (en) * | 2009-03-13 | 2010-09-16 | University Of Kansas | Breakaway casing connection |
| CN110230309A (en) * | 2019-01-24 | 2019-09-13 | 中建新疆建工土木工程有限公司 | Karst region bridge solution cavity pile base construction method |
| CN111636419A (en) * | 2020-07-02 | 2020-09-08 | 湖南科技学院 | Construction equipment and construction method for grouting thin-wall tubular pile |
| CN111764404A (en) * | 2020-07-22 | 2020-10-13 | 湖南科技学院 | Partially recyclable secant pile supporting structure and construction method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113756293A (en) * | 2021-09-26 | 2021-12-07 | 北京首钢国际工程技术有限公司 | Post-grouting cast-in-place pile suitable for strongly corrosive geological conditions and construction method thereof |
| CN113882398A (en) * | 2021-10-12 | 2022-01-04 | 中铁七局集团郑州工程有限公司 | Grouting reinforcement construction method for pile foundation casing of water-rich sand gravel soil layer |
| CN114016500A (en) * | 2021-11-10 | 2022-02-08 | 中国建筑第四工程局有限公司 | Steel casing cast-in-situ bored pile advanced reinforcement construction method in sensitive environment |
| CN114753361A (en) * | 2022-04-29 | 2022-07-15 | 深圳市交通公用设施建设中心 | Pile foundation steel casing capable of controlling stratum deformation and construction method thereof |
| CN114753361B (en) * | 2022-04-29 | 2024-04-30 | 深圳市交通公用设施建设中心 | Pile foundation steel pile casing capable of controlling stratum deformation and construction method thereof |
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Application publication date: 20201229 |
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