CN112081112A - Construction method of foundation pit supporting pile under unfavorable geological condition - Google Patents
Construction method of foundation pit supporting pile under unfavorable geological condition Download PDFInfo
- Publication number
- CN112081112A CN112081112A CN202010855316.4A CN202010855316A CN112081112A CN 112081112 A CN112081112 A CN 112081112A CN 202010855316 A CN202010855316 A CN 202010855316A CN 112081112 A CN112081112 A CN 112081112A
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- China
- Prior art keywords
- foundation pit
- steel
- sleeve
- steel pipe
- pit supporting
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/12—Restraining of underground water by damming or interrupting the passage of underground water
- E02D19/18—Restraining of underground water by damming or interrupting the passage of underground water by making use of sealing aprons, e.g. diaphragms made from bituminous or clay material
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- 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
- E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/003—Injection of material
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a foundation pit supporting pile construction method under unfavorable geological conditions, which solves the problems that foundation pit supporting piles are not easy to form and are easy to erode in some unfavorable geologies in the prior art, and the foundation pit supporting pile construction method comprises the following steps of S1: punching the foundation pit to form a plurality of foundation pit holes; s2: installing the steel pipe sleeve into the hole of the foundation pit; s3: grouting is carried out in the gap between the adjacent steel sleeves to form a waterproof curtain; s4: inserting a steel reinforcement cage into the steel sleeve, and pouring concrete into the steel sleeve; s5: pulling out the steel sleeve; through when the steel pipe sleeve concreting, adopt high-pressure slip casting in the clearance of two adjacent steel pipe sleeves, form the stagnant water curtain, can stabilize the foundation ditch hole and can not collapse when foundation ditch fender pile shaping, can prevent again that water from corroding foundation ditch fender pile, the concreting simultaneously can go on with high-pressure slip casting simultaneously, can be at reduction of erection time to a great extent.
Description
Technical Field
The invention relates to the field of foundation pit supporting piles, in particular to a foundation pit supporting pile construction method under unfavorable geological conditions.
Background
In the process of building, some unsuitable foundations are not met, but the foundation is limited by areas and cannot be transferred to a position for building. For example, in the case of soft soil, the soil also contains much water, and it is known that the foundation is the most important foundation in the building process, and the foundation determines the stability of the building. The foundation pit supporting pile adopts supporting, reinforcing and protecting measures for ensuring the safety of underground structure construction and the surrounding environment of the foundation pit, but under the condition of higher soil quality and water content, water usually permeates soil to corrode the foundation pit supporting pile, once the water is corroded to a certain degree, the water cannot play a corresponding role, so that the foundation is unstable, and peripheral holes of the supporting pile are easy to collapse when the pile is formed.
Disclosure of Invention
The invention has been made in view of the above problems, and an object of the invention is to provide a method for constructing a foundation pit support pile under unfavorable geological conditions, which can isolate water erosion, and has convenient construction and good pile-forming quality.
In order to achieve the aim, the invention provides a foundation pit support pile construction method under unfavorable geological conditions, which comprises the following steps:
s1: punching the foundation pit to form a plurality of foundation pit holes;
s2: installing the steel pipe sleeve into the hole of the foundation pit;
s3: grouting is carried out in the gap between the adjacent steel sleeves to form a waterproof curtain;
s4: inserting a steel reinforcement cage into the steel sleeve, and pouring concrete into the steel sleeve;
s5: and pulling out the steel sleeve.
According to the construction method of the foundation pit support pile under the unfavorable geological condition, in the step S1, a drilling pile machine is used for drilling holes or a punching pile machine is used for punching holes, so that a plurality of foundation pit holes are formed.
According to the construction method of the foundation pit support pile under the unfavorable geological condition, in the step S2, the diameter of the foundation pit hole is larger than the outer diameter of the steel pipe sleeve.
According to the construction method of the foundation pit support pile under the unfavorable geological condition, the step S3 and the step S4 can be performed by pouring concrete and grouting synchronously.
According to the construction method of the foundation pit support pile under the unfavorable geological condition, in the step S3, high-pressure grouting is adopted to form a waterproof curtain.
According to the construction method of the foundation pit support pile under the unfavorable geological condition, in the step S5, the steel pipe sleeve can be pulled out at one time or in multiple stages.
The invention has the following beneficial effects:
1. a waterproof curtain is arranged outside the support piles formed by the concrete, so that water erosion can be better isolated.
2. The waterproof curtain and the supporting piles formed by the concrete can be effectively combined, and the waterproof effect is good.
3. The support pile does not collapse in the construction process, and the pile forming quality is guaranteed.
4. The supporting piles and the waterproof curtain formed by pouring concrete can be constructed simultaneously, and the construction period is shortened.
Drawings
FIG. 1 is an overall construction flow diagram of the present invention.
Detailed Description
The following are specific embodiments of the present invention and are further described with reference to the drawings, but the present invention is not limited to these embodiments.
As shown in fig. 1, a foundation pit support pile construction method under unfavorable geological conditions includes the following steps:
s1: the foundation pit is punched to form a plurality of foundation pit holes, the foundation pit is punched to select drilling or punching, drilling pile machinery is adopted to drill or punching pile machinery is adopted to punch, and the drilling pile machinery is convenient to use.
S2: the steel pipe sleeve is installed in the foundation pit hole, the diameter of the foundation pit hole is larger than that of the steel pipe sleeve, the outer diameter of the steel pipe sleeve is the same as that of the foundation pit supporting pile, after the steel pipe is taken out, the concrete filling coefficient of the foundation pit supporting pile is reduced, and more concrete can be saved.
S3: and grouting is carried out in the gap between the adjacent steel sleeves to form a waterproof curtain, high-pressure grouting is adopted in the grouting starting mode, and the formed waterproof curtain can prevent water from corroding the support piles and can also prevent collapse of the foundation pit holes.
S4: and inserting a steel reinforcement cage into the steel sleeve, and pouring concrete into the steel sleeve, wherein the concrete poured into the steel sleeve is matched with the steel reinforcement cage to form the foundation pit supporting pile. And S3 and S4 can be synchronously performed, high-pressure grouting is performed in the gap between the adjacent steel pipe sleeves on one side, concrete is poured into the steel pipe sleeves on the other side, and the construction period can be shortened.
S5: the steel casing is extracted, the steel pipe sleeve can be extracted once or the multistage is extracted, whether the steel pipe sleeve can be extracted once or not is decided according to the length of the foundation pit support pile, when the foundation pit support pile is long, after a part of concrete is poured, the steel pipe sleeve can be extracted for one section, pouring is carried out again, circulation pouring is carried out like this, until the steel pipe sleeve is completely extracted, when the foundation pit support pile is short, the steel pipe sleeve can be extracted once, after the steel pipe sleeve is completely extracted, the foundation pit support pile can be combined with a waterproof curtain, and a better waterproof effect is achieved.
According to the foundation pit support pile construction method under the adverse geological condition, the high-pressure grouting is adopted in the gap between every two adjacent steel pipe sleeves while the steel pipe sleeves are poured with the concrete to form the waterproof curtain, so that the foundation pit holes can be stabilized without collapsing during the forming of the foundation pit support piles, the foundation pit support piles can be prevented from being eroded by water, the pouring of the concrete and the high-pressure grouting can be simultaneously carried out, and the construction period can be shortened to a greater extent.
The technical solutions of the present invention are explained in detail above with reference to the accompanying drawings, and the described embodiments are used to help understanding the idea of the present invention. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (6)
1. A foundation pit supporting pile construction method under unfavorable geological conditions is characterized by comprising the following steps:
s1: punching the foundation pit to form a plurality of foundation pit holes;
s2: installing the steel pipe sleeve into the hole of the foundation pit;
s3: grouting is carried out in the gap between the adjacent steel sleeves to form a waterproof curtain;
s4: inserting a steel reinforcement cage into the steel sleeve, and pouring concrete into the steel sleeve;
s5: and pulling out the steel sleeve.
2. The method for constructing foundation pit supporting piles under unfavorable geological conditions according to claim 1, wherein in the step S1, the holes are drilled by a drilling pile machine or punched by a punching pile machine to form a plurality of foundation pit holes.
3. The method for constructing the foundation pit support pile under the unfavorable geological condition as recited in claim 1, wherein in the step S2, the diameter of the foundation pit hole is larger than the outer diameter of the steel pipe sleeve.
4. The method for constructing foundation pit supporting piles under unfavorable geological conditions as claimed in claim 1, wherein the step S3 and the step S4 are performed simultaneously by pouring concrete and grouting.
5. The method for constructing foundation pit supporting piles under unfavorable geological conditions according to claim 4, wherein in the step S3, a waterproof curtain is formed by high-pressure grouting.
6. The method for constructing a foundation pit supporting pile under unfavorable geological conditions as claimed in claim 1, wherein the steel pipe sleeve can be pulled out at one time or in multiple stages in step S5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010855316.4A CN112081112A (en) | 2020-08-24 | 2020-08-24 | Construction method of foundation pit supporting pile under unfavorable geological condition |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010855316.4A CN112081112A (en) | 2020-08-24 | 2020-08-24 | Construction method of foundation pit supporting pile under unfavorable geological condition |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112081112A true CN112081112A (en) | 2020-12-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010855316.4A Pending CN112081112A (en) | 2020-08-24 | 2020-08-24 | Construction method of foundation pit supporting pile under unfavorable geological condition |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1235226A (en) * | 1999-04-30 | 1999-11-17 | 中国第一冶金建设公司技术开发公司 | Method for protecting support of foundation ditch by mud jacking for retaining and water inhibiting and apparatus for mud jacking |
| KR101557048B1 (en) * | 2014-08-12 | 2015-10-02 | 한국기초(주) | the construction method of the improved smart wall cast injected concrete pile structure |
| CN109778873A (en) * | 2019-02-01 | 2019-05-21 | 北京住总集团有限责任公司 | Ejection for water plugging method and device between a kind of fender post |
| CN111254909A (en) * | 2020-01-18 | 2020-06-09 | 陕西建工基础建设集团有限公司 | Composite pile foundation construction process for soft soil area foundation and composite pile foundation |
-
2020
- 2020-08-24 CN CN202010855316.4A patent/CN112081112A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1235226A (en) * | 1999-04-30 | 1999-11-17 | 中国第一冶金建设公司技术开发公司 | Method for protecting support of foundation ditch by mud jacking for retaining and water inhibiting and apparatus for mud jacking |
| KR101557048B1 (en) * | 2014-08-12 | 2015-10-02 | 한국기초(주) | the construction method of the improved smart wall cast injected concrete pile structure |
| CN109778873A (en) * | 2019-02-01 | 2019-05-21 | 北京住总集团有限责任公司 | Ejection for water plugging method and device between a kind of fender post |
| CN111254909A (en) * | 2020-01-18 | 2020-06-09 | 陕西建工基础建设集团有限公司 | Composite pile foundation construction process for soft soil area foundation and composite pile foundation |
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Application publication date: 20201215 |