CN111778964B - Foundation pit hollow support pile, construction method thereof and foundation pit support structure - Google Patents
Foundation pit hollow support pile, construction method thereof and foundation pit support structure Download PDFInfo
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- CN111778964B CN111778964B CN202010723266.4A CN202010723266A CN111778964B CN 111778964 B CN111778964 B CN 111778964B CN 202010723266 A CN202010723266 A CN 202010723266A CN 111778964 B CN111778964 B CN 111778964B
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- foundation pit
- pile body
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- inner cavity
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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
- E02D5/24—Prefabricated piles
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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
- E02D17/20—Securing of slopes or inclines
- E02D17/207—Securing of slopes or inclines with means incorporating sheet piles or piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention provides a foundation pit hollow support pile, a construction method thereof and a foundation pit support structure, wherein the foundation pit hollow support pile comprises the following components: the prefabricated pile body is provided with an inner cavity which is communicated up and down; the inclinometer tube is arranged in the inner cavity in a centering way; and the fixing material is filled between the inclinometer pipe and the inner cavity and comprises a sand layer and a mortar layer which are alternately arranged, the thickness of the sand layer is greater than that of the mortar layer, and the mortar layer is solidified to form a force transmission plate which is connected with the inclinometer pipe and the precast pile body. The invention solves the problems of troublesome site construction and high cost of the traditional cast-in-place pile supporting pile and the inner support in the foundation pit supporting mode.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a hollow foundation pit supporting pile, a construction method thereof and a foundation pit supporting structure.
Background
With the continuous development of urban construction, the large-scale infrastructure construction scale is larger and larger, the foundation design depth is deeper and deeper, and the foundation pit supporting condition is more complex. Usually, deep foundation pit supporting is mostly a supporting form of a slope, a cast-in-place pile supporting pile and an inner support combined structure. The site construction of the traditional cast-in-place pile supporting pile and the inner support in the foundation pit supporting mode is troublesome and high in cost.
Disclosure of Invention
In order to overcome the defects in the prior art, the foundation pit hollow support pile, the construction method thereof and the foundation pit support structure are provided so as to solve the problems of complicated field construction and high cost of the traditional foundation pit support type cast-in-place pile support and inner support.
In order to realize above-mentioned purpose, provide a hollow fender pile of foundation ditch, include:
the prefabricated pile body is provided with an inner cavity which is communicated up and down;
the inclinometer tube is arranged in the inner cavity in a centering way; and
and the fixing material filled between the inclinometer pipe and the inner cavity comprises a sand layer and a mortar layer which are alternately arranged, the thickness of the sand layer is greater than that of the mortar layer, and the mortar layer is solidified to form a force transmission plate for connecting the inclinometer pipe and the precast pile body.
Furthermore, the thickness of the sand layer is 3-5 times of that of the mortar layer.
Further, the thickness of the mortar layer is 0.3 m.
Further, the bottom layer of the fixing material is the sand layer.
Furthermore, the precast pile body is a rectangular hollow pile.
The invention provides a construction method of a hollow support pile of a foundation pit, which comprises the following steps:
embedding a prefabricated pile body;
an inclinometer pipe is arranged in the inner cavity of the precast pile body in a centering way;
and alternately filling a sand layer and a mortar layer of a fixing material between the inclinometer pipe and the inner cavity of the precast pile body, so that the mortar layer is solidified to form a force transmission plate for connecting the inclinometer pipe and the precast pile body.
The invention provides a foundation pit supporting structure which comprises foundation pit hollow supporting piles, solid pouring supporting piles and jet grouting anchor cables, wherein the foundation pit hollow supporting piles and the solid pouring supporting piles are alternately arranged around a foundation pit, each foundation pit hollow supporting pile and each solid pouring supporting pile are respectively connected with the jet grouting anchor cables, and the jet grouting anchor cables are embedded in a foundation of the foundation pit.
The hollow foundation pit supporting pile has the advantages that the precast pile body is adopted to replace a cast-in-place supporting pile, the site construction time can be saved, the construction cost is reduced, the inclinometer pipe is fixedly arranged in the inner cavity of the precast pile body through the mortar layer and the sand layer of the fixing material, the fixing material main body is filled with the sand layer, the strength and the lateral rigidity of the precast pile body are prevented from being increased, the deformation condition of the soil body at the upper part of the foundation pit can be accurately monitored through the inclinometer pipe, and the accuracy and the effectiveness of the inclinometer monitoring are ensured.
Drawings
Fig. 1 is a schematic structural view of a foundation pit hollow support pile according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a precast pile body according to an embodiment of the present invention.
Fig. 3 is a schematic view of a state in which the inclinometer tube is mounted in the inner cavity according to the embodiment of the invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
Fig. 1 is a schematic structural view of a foundation pit hollow support pile according to an embodiment of the present invention, fig. 2 is a schematic structural view of a precast pile body according to an embodiment of the present invention, and fig. 3 is a schematic structural view of an inner cavity in which an inclinometer pipe according to an embodiment of the present invention is installed.
Referring to fig. 1 to 3, the present invention provides a hollow support pile for a foundation pit, including: the device comprises a precast pile body 1, an inclinometer pipe 2 and a fixing material 3.
The precast pile body 1 has an inner cavity 10 which is through from top to bottom. The inclinometer tube 2 is mounted centrally in the inner cavity 10. The fixing material 3 is filled between the inclinometer pipe 2 and the inner cavity 10 of the precast pile body.
Specifically, the potting compound 3 includes a sand layer 31 and a mortar layer 32. The sand layer 31 and the mortar layer 32 are filled between the inclinometer 2 and the inner cavity 10 of the precast pile body in a layered pouring manner, and the sand layer 31 and the mortar layer 32 are alternately arranged.
The thickness of the sand layer 31 is greater than the thickness of the mortar layer 32. The mortar layer 32 forms a solid force transfer plate connected between the inclinometer pipe 2 and the precast pile body 1 after consolidation.
The hollow foundation pit supporting pile adopts the precast pile body to replace a cast-in-place supporting pile, the field construction time can be saved, the construction cost is reduced, the inclinometer is fixedly arranged in the inner cavity of the precast pile body through the mortar layer and the sand layer of the fixing material, wherein the fixing material main body is filled with the sand layer to avoid increasing the strength and the lateral rigidity of the precast pile body, so that the deformation condition of the soil body at the upper part of the foundation pit can be accurately monitored through the inclinometer, and the accurate and effective inclinometry monitoring can be ensured.
In a preferred embodiment, the thickness of the sand layer 31 is 3 to 5 times of the thickness of the mortar layer 32.
Specifically, in the present embodiment, the thickness of the mortar layer 32 is 0.3 m. The thickness of the sand layer is 1 m-1.5 m. The sand layer is formed by pouring river sand into the precast pile body.
And the sand layer and the mortar layer are alternately filled between the inner cavity of the precast pile body and the inclinometer and to the opening of the inner cavity at the top of the precast pile body from the bottom end of the precast pile body, and are tightly filled.
In this embodiment, the bottom layer of the fixing material 3 is a sand layer 31. By alternately filling sand and cement mortar between the inclinometer pipe and the inner cavity of the precast pile body, the inclinometer pipe is effectively connected with the hollow precast pile body under the condition of not increasing the rigidity and the strength of the hollow precast pile body, and the inclinometer deformation condition of the precast pile body is accurately measured to the maximum extent so as to accurately master the deformation condition of the soil body on the upper part of the foundation pit.
In the present embodiment, the precast pile body 1 is a rectangular hollow pile. The cross section of the precast pile body is rectangular.
The invention provides a construction method of a hollow support pile of a foundation pit, which comprises the following steps:
s1: and embedding the precast pile body 1.
S2: and the inclinometer pipe 2 is installed in the inner cavity 10 in the precast pile body 1 in a centering way.
S3: and alternately filling a sand layer 31 and a mortar layer 32 of the fixing material 3 between the inclinometer pipe 2 and the inner cavity 10 of the precast pile body 1, so that the mortar layer 32 is solidified to form a force transmission plate for connecting the inclinometer pipe 2 and the precast pile body 1.
The invention provides a foundation pit supporting structure which is composed of a foundation pit hollow supporting pile, a solid pouring supporting pile and a jet grouting anchor rope. Wherein, the hollow support piles and the solid cast-in-place support piles of the foundation pit are alternately arranged around the edge of the foundation pit. And each foundation pit hollow supporting pile and each solid filling supporting pile are respectively connected with a jet grouting anchor cable. The jet grouting anchor cable is buried in the foundation of the foundation pit.
The invention provides a foundation pit supporting structure which adopts a combination form of a prefabricated foundation pit hollow supporting pile, a solid pouring supporting pile and a jet grouting anchor cable, avoids using an inner support, saves construction time and construction cost on an engineering site, and simultaneously utilizes the foundation pit hollow supporting pile to effectively install an inclinometer pipe so as to accurately and precisely measure the inclinometry deformation condition of a prefabricated pile body of the foundation pit hollow supporting pile, thereby accurately mastering the deformation condition of a soil body on the upper part of a foundation pit.
It should be noted that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical essence, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the invention is to be defined by the scope of the appended claims.
Claims (4)
1. The utility model provides a hollow fender pile of foundation ditch which characterized in that includes:
the prefabricated pile body is provided with an inner cavity which is communicated up and down;
the inclinometer tube is arranged in the inner cavity in a centering way; and
the fixing material filled between the inclinometer pipe and the inner cavity comprises a sand layer and a mortar layer which are alternately arranged, the thickness of the sand layer is greater than that of the mortar layer, and the mortar layer is solidified to form a force transmission plate for connecting the inclinometer pipe and the precast pile body;
the thickness of the sand layer is 3-5 times of that of the mortar layer;
the thickness of the mortar layer is 0.3 m;
the bottom layer of the fixing material is the sand layer.
2. The foundation pit hollow support pile according to claim 1, wherein the precast pile body is a rectangular hollow pile.
3. A construction method of a hollow foundation pit supporting pile according to any one of claims 1-2, characterized by comprising the following steps:
embedding a prefabricated pile body;
an inclinometer pipe is arranged in the inner cavity of the precast pile body in a centering way;
and alternately filling a sand layer and a mortar layer of a fixing material between the inclinometer pipe and the inner cavity of the precast pile body, so that the mortar layer is solidified to form a force transmission plate for connecting the inclinometer pipe and the precast pile body.
4. A foundation pit supporting structure, characterized by comprising the hollow foundation pit supporting piles, the solid cast-in-place supporting piles and the jet grouting anchor cables according to any one of claims 1 to 2, wherein the hollow foundation pit supporting piles and the solid cast-in-place supporting piles are alternately arranged around a foundation pit, each of the hollow foundation pit supporting piles and the solid cast-in-place supporting piles is respectively connected with the jet grouting anchor cables, and the jet grouting anchor cables are buried in the foundation of the foundation pit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010723266.4A CN111778964B (en) | 2020-07-24 | 2020-07-24 | Foundation pit hollow support pile, construction method thereof and foundation pit support structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010723266.4A CN111778964B (en) | 2020-07-24 | 2020-07-24 | Foundation pit hollow support pile, construction method thereof and foundation pit support structure |
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| Publication Number | Publication Date |
|---|---|
| CN111778964A CN111778964A (en) | 2020-10-16 |
| CN111778964B true CN111778964B (en) | 2022-04-12 |
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| CN202010723266.4A Active CN111778964B (en) | 2020-07-24 | 2020-07-24 | Foundation pit hollow support pile, construction method thereof and foundation pit support structure |
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Citations (9)
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|---|---|---|---|---|
| CN1502751A (en) * | 2002-11-27 | 2004-06-09 | 陈志坚 | Flexible pipe pipe-following hole bottom grouting technology |
| CN1690317A (en) * | 2004-04-29 | 2005-11-02 | 宝山钢铁股份有限公司 | Method for measuring pipe pile swing resulted from foundation ditch digging |
| CN203337138U (en) * | 2013-07-31 | 2013-12-11 | 洛阳理工学院 | Traction auxiliary device of horizontal inclinometer |
| CN103741697A (en) * | 2014-01-16 | 2014-04-23 | 杭州南联地基基础工程有限公司 | Construction method of precast reinforced concrete hollow lateral force resistant pile enclosure wall |
| CN104329076A (en) * | 2014-11-24 | 2015-02-04 | 中国电建集团中南勘测设计研究院有限公司 | Inclination measuring hole osmometer device and installation method |
| CN106592654A (en) * | 2016-12-28 | 2017-04-26 | 张继红 | Monitoring method for perpendicularity of steel pipe pile |
| CN106638729A (en) * | 2017-01-20 | 2017-05-10 | 河海大学 | Novel mounting protective device for inclinometer tube for steel sheet pile |
| CN110685670A (en) * | 2019-09-10 | 2020-01-14 | 中国地质大学（武汉） | Intelligent strain type drilling clinometer and measuring method |
| CN111236331A (en) * | 2020-03-13 | 2020-06-05 | 中铁上海工程局集团有限公司 | Deep foundation pit spliced precast pile inclinometer pipe mounting structure and application method thereof |
-
2020
- 2020-07-24 CN CN202010723266.4A patent/CN111778964B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1502751A (en) * | 2002-11-27 | 2004-06-09 | 陈志坚 | Flexible pipe pipe-following hole bottom grouting technology |
| CN1690317A (en) * | 2004-04-29 | 2005-11-02 | 宝山钢铁股份有限公司 | Method for measuring pipe pile swing resulted from foundation ditch digging |
| CN203337138U (en) * | 2013-07-31 | 2013-12-11 | 洛阳理工学院 | Traction auxiliary device of horizontal inclinometer |
| CN103741697A (en) * | 2014-01-16 | 2014-04-23 | 杭州南联地基基础工程有限公司 | Construction method of precast reinforced concrete hollow lateral force resistant pile enclosure wall |
| CN104329076A (en) * | 2014-11-24 | 2015-02-04 | 中国电建集团中南勘测设计研究院有限公司 | Inclination measuring hole osmometer device and installation method |
| CN106592654A (en) * | 2016-12-28 | 2017-04-26 | 张继红 | Monitoring method for perpendicularity of steel pipe pile |
| CN106638729A (en) * | 2017-01-20 | 2017-05-10 | 河海大学 | Novel mounting protective device for inclinometer tube for steel sheet pile |
| CN110685670A (en) * | 2019-09-10 | 2020-01-14 | 中国地质大学（武汉） | Intelligent strain type drilling clinometer and measuring method |
| CN111236331A (en) * | 2020-03-13 | 2020-06-05 | 中铁上海工程局集团有限公司 | Deep foundation pit spliced precast pile inclinometer pipe mounting structure and application method thereof |
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| CN111778964A (en) | 2020-10-16 |
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