CN113513019A - Double pile casing for pile foundation detection and use method thereof - Google Patents
Double pile casing for pile foundation detection and use method thereof Download PDFInfo
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- CN113513019A CN113513019A CN202111026234.XA CN202111026234A CN113513019A CN 113513019 A CN113513019 A CN 113513019A CN 202111026234 A CN202111026234 A CN 202111026234A CN 113513019 A CN113513019 A CN 113513019A
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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
- E02D5/66—Mould-pipes or other moulds
- E02D5/68—Mould-pipes or other moulds for making bulkheads or elements thereof
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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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- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention relates to the technical field of pile foundation detection, and comprises a double casing for pile foundation detection and a using method thereof. A double pile casing for pile foundation detection comprises an inner pile casing and an outer pile casing, wherein the inner pile casing and the outer pile casing are firmly supported together through a plurality of inner supports; the bottom parts of the inner layer protection cylinder and the outer layer protection cylinder are provided with an inclined end plate and a cutting tool bit; the inclined end plate is connected with the bottom ends of the inner layer pile casing and the outer layer pile casing and forms a downward pointed shape; the cutting tool bit is arranged at the bottom of the inner side of the inner layer protection cylinder. The top is closed by arranging a foaming agent barrier layer at the fixed rib, so that the soil around the pile is prevented from flowing into the pile casing to influence the detection result; when the test pile is loaded or pulled to be detected, the shaft force of the pile body can be effectively transmitted to the designed elevation of the pile and below the designed elevation due to the existence of the gap in the double pile casings, the influence of the surrounding soil layer on the side frictional resistance of the periphery of the pile is eliminated, and therefore data can be accurately obtained.
Description
Technical Field
The invention relates to the technical field of pile foundation detection, in particular to a double pile casing for pile foundation detection.
Background
With the continuous expansion of the development scale and depth of the urban underground space, the pile testing work before the engineering construction becomes more and more important. The reasonable design of the pile foundation is very key to controlling the construction cost and saving the project progress. And before large-area construction of the engineering pile foundation, the actual bearing capacity value is determined by designing a test pile so as to verify the reasonability of design. Because the depth of the basement is often deep, the traditional construction method after excavation cannot meet the project construction period requirement, and the pile testing construction on the original ground surface is influenced by the soil layer in the depth range of the foundation pit. The friction resistance of the pile side is considered by experience, so that the waste of the bearing capacity of the design is easily caused or the situation of unreasonable design is caused.
Disclosure of Invention
The invention relates to a double pile casing for pile foundation detection, which is used for eliminating the influence of the friction force of the peripheral soil layer of a non-engineering pile actual action area of a basement part on a pile body when being used for evaluating a test pile detection result, thereby enabling the detection data to be more accurate and accurately evaluating the bearing capacity of the formed pile. The design and construction of project pile foundations can be better served as the early design basis.
A double pile casing for pile foundation detection comprises an inner pile casing and an outer pile casing, wherein the inner pile casing and the outer pile casing are firmly supported together through a plurality of inner supports; the bottom parts of the inner layer pile casing and the outer layer pile casing are provided with an inclined end plate and a cutting tool bit; the inclined end plate is connected with the bottom ends of the inner layer protection cylinder and the outer layer protection cylinder and forms a downward pointed shape; the cutting tool bit is arranged at the bottom of the inner side of the inner-layer protective cylinder.
Further, the cutting tool bit extends out from the bottom of the inner-layer protective cylinder to form an extending section, and the outer peripheral surface of the extending section is an inclined surface.
Further, the inclination rate of the inclined surface is the same as that of the inclined end plate, and the two are in flush transition.
Further, along the axial direction of two protecting a section of thick bamboo, the inlayer protects a section of thick bamboo and an outer layer protects a section of thick bamboo and is provided with a plurality of axially spaced inside support rings, and every inside support ring includes a plurality of circumferentially spaced a plurality of inside supports.
Further, the respective inner supports of adjacent inner support rings are arranged offset from each other in the axial direction.
Further, the top in the inner layer pile casing and the outer layer pile casing is filled with a filling interlayer.
Furthermore, a fixing rib connected with the inner-layer pile casing and the outer-layer pile casing is arranged in the filling interlayer.
Further, the gap between the inner-layer pile casing and the outer-layer pile casing is 5-10 cm.
A use method of a double casing for pile foundation detection comprises the following steps:
step one, pile hole forming: punching the engineering pile by using a pile machine;
step two, putting a double protection cylinder: hoisting the double pile casings into the engineering pile, aligning the double pile casings with the center of the pile, and pressing the double pile casings into the double pile casings by adopting pressure equipment;
thirdly, positioning a double protection cylinder: pressing down the double pile casings until the depth of the double pile casings exceeds the normal design elevation of the engineering pile, and enabling the tops of the double pile casings to be close to the natural ground;
fourthly, pouring concrete: pouring pile body concrete in the inner-layer pile casing to the natural ground;
fifthly, detecting the intensity: and after the strength of the test pile meets the design requirement, carrying out bearing capacity detection.
The invention has the following beneficial effects: the top is closed by arranging a filling interlayer at the position of the fixed rib, so that the soil around the pile is prevented from flowing into the pile casing to influence the detection result; when the test pile is loaded or pulled to be detected, the shaft force of the pile body can be effectively transmitted to the designed elevation of the pile and below the designed elevation due to the existence of the gap in the double pile casings, the influence of the surrounding soil layer on the side frictional resistance of the periphery of the pile is eliminated, and therefore data can be accurately obtained.
Drawings
FIG. 1 is a schematic cross-sectional view of the present invention;
FIG. 2 is a schematic structural view of the present invention;
FIG. 3 is a schematic diagram of the method of the present invention.
Description of reference numerals: 1. the device comprises an inner-layer protective tube, 2, an outer-layer protective tube, 3, a foaming agent barrier layer, 4, a fixing rib, 5, an inner support, 6, an inclined end plate, 7 and a cutting blade.
The specific implementation mode is as follows:
the present invention will be described in further detail with reference to the accompanying drawings.
The invention relates to a double pile casing for pile foundation detection, which is used for eliminating the influence of the friction force of the peripheral soil layer of a non-engineering pile actual action area of a basement part on a pile body when being used for evaluating a test pile detection result, thereby enabling the detection data to be more accurate and accurately evaluating the bearing capacity of the formed pile. The design and construction of project pile foundations can be better served as the early design basis.
A double pile casing for pile foundation detection comprises an inner pile casing 1 and an outer pile casing 2, wherein the inner pile casing 1 and the outer pile casing 1 are firmly fixed together through a plurality of internal supports 5; the bottom parts of the inner layer protection barrel 1 and the outer layer protection barrel 2 are provided with an inclined end plate 6 and a cutting tool bit 7; the inclined end plate 6 is connected with the bottom ends of the inner layer protection cylinder 1 and the outer layer protection cylinder 2 and forms a downward pointed shape; the cutting bit 7 is arranged at the bottom of the inner side of the inner-layer protection cylinder 1.
The cutting bit 7 is extended from the bottom of the inner casing 1 to form an extended section, and the outer peripheral surface of the extended section is an inclined surface.
The slope of the slope is the same as the slope of the sloped end plate 6 and the two transition is flush.
Along the axial direction of two protecting a section of thick bamboo, an inlayer protects a section of thick bamboo 1 and an outer section of thick bamboo 2 and is provided with a plurality of axially spaced inside brace circles, and two adjacent inside brace circles axial interval is 1 meter, and every inside brace circle includes a plurality of inside supports 5 of a plurality of circumference intervals, and each inside support of adjacent inside brace circle staggers each other in the axial direction and arranges to even atress.
The top packing that the inlayer protected section of thick bamboo 1 and the outer section of thick bamboo 2 was filled with fills interlayer 3, and preferred packing interlayer material is the foamer barrier layer for avoid the soil body all around to flow into between the inlayer protects section of thick bamboo 1 and the outer section of thick bamboo 2. The filling interlayer 3 is internally provided with a fixed rib 4 connected with the inner-layer pile casing 1 and the outer-layer pile casing 2, so that the filling interlayer 3 is prevented from displacing in the pressing process of the double pile casings. The gap between the inner layer pile casing 1 and the outer layer pile casing 2 is 5-10 cm.
A method for using a double casing for pile foundation detection, which, with reference to fig. 3, comprises:
step one, pile hole forming: punching the engineering pile by using a pile machine, and then obtaining the center of the engineering pile by using the intersection point of two straight lines along the diameter and marking;
step two, putting a double protection cylinder: after the engineering pile is formed by a hole of the pile machine, the double protection cylinders are hoisted into the engineering pile, the double protection cylinders are ensured to be aligned with the center of the pile in the hoisting process, and finally hydraulic equipment is adopted to press the double protection cylinders into the double protection cylinders, so that the double protection cylinders are easier to press down due to the action of the inclined end plates 6 and the cutting tool bit 7, the required pressure is lower, the pressing down process is more stable, and the filling interlayer 3 can be further prevented from displacing;
thirdly, positioning a double protection cylinder: pressing down the double pile casings until the depth of the double pile casings exceeds the normal design elevation of the engineering pile, and enabling the tops of the double pile casings to be close to the natural ground;
fourthly, pouring concrete: pouring pile body concrete in the inner-layer pile casing to the natural ground;
fifthly, detecting the intensity: and after the strength of the test pile meets the design requirement, carrying out loading or drawing detection, namely, detecting the bearing capacity.
The present invention can be easily implemented by those skilled in the art from the above detailed description. It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the basis of the disclosed embodiments, a person skilled in the art can combine different technical features at will, thereby implementing different technical solutions.
Claims (9)
1. The utility model provides a two that pile foundation detected and used protect a section of thick bamboo which characterized in that: the device comprises an inner-layer pile casing (1) and an outer-layer pile casing (2), wherein the inner-layer pile casing (1) and the outer-layer pile casing (1) are firmly fixed together through a plurality of internal supports (5); the bottom parts of the inner layer protecting cylinder (1) and the outer layer protecting cylinder (2) are provided with an inclined end plate (6) and a cutting tool bit (7); the inclined end plate (6) is connected with the bottom ends of the inner-layer pile casing (1) and the outer-layer pile casing (2) and forms a downward pointed shape; the cutting tool bit (7) is arranged at the bottom of the inner side of the inner-layer protective cylinder (1).
2. The double casing for pile foundation detection according to claim 1, wherein: the cutting tool bit (7) extends out from the bottom of the inner layer casing (1) to form an extending section, and the peripheral surface of the extending section is an inclined surface.
3. The double casing for pile foundation detection according to claim 2, wherein: the inclined surface has the same inclination rate as the inclined end plate, and the inclined end plate are in flush transition.
4. The double casing for pile foundation detection according to claim 1, wherein: along the axial direction of two protecting the section of thick bamboo, inlayer protects a section of thick bamboo (1) and skin and protects a section of thick bamboo (2) and be provided with a plurality of axially spaced inside brace circles, and every inside brace circle includes a plurality of circumference spaced a plurality of inside supports (5).
5. The double casing for pile foundation detection according to claim 4, wherein: the individual inner supports of adjacent inner support rings are arranged offset to one another in the axial direction.
6. The double casing for pile foundation detection according to claim 1, wherein: the top parts in the inner layer pile casing (1) and the outer layer pile casing (2) are filled with filling interlayer (3).
7. The double casing for pile foundation detection according to claim 6, wherein: and a fixing rib (4) connected with the inner-layer pile casing (1) and the outer-layer pile casing (2) is arranged in the filling interlayer (3).
8. The double casing for pile foundation detection according to claim 1, wherein: the gap between the inner-layer pile casing (1) and the outer-layer pile casing (2) is 5-10 cm.
9. The utility model provides a pile foundation detects application method of using two casings, its characterized in that:
the using method comprises the following steps:
step one, pile hole forming: punching the engineering pile by using a pile machine;
step two, putting a double protection cylinder: hoisting the double pile casings into the engineering pile, aligning the double pile casings with the center of the pile, and pressing the double pile casings into the double pile casings by adopting pressure equipment;
thirdly, positioning a double protection cylinder: pressing down the double pile casings until the depth of the double pile casings exceeds the normal design elevation of the engineering pile, and enabling the tops of the double pile casings to be close to the natural ground;
fourthly, pouring concrete: pouring pile body concrete in the inner-layer pile casing to the natural ground;
fifthly, detecting the intensity: and after the strength of the test pile meets the design requirement, carrying out bearing capacity detection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111026234.XA CN113513019A (en) | 2021-09-02 | 2021-09-02 | Double pile casing for pile foundation detection and use method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111026234.XA CN113513019A (en) | 2021-09-02 | 2021-09-02 | Double pile casing for pile foundation detection and use method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113513019A true CN113513019A (en) | 2021-10-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111026234.XA Withdrawn CN113513019A (en) | 2021-09-02 | 2021-09-02 | Double pile casing for pile foundation detection and use method thereof |
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Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004204588A (en) * | 2002-12-26 | 2004-07-22 | Chiken Co Ltd | Geological sampler |
| CN201933516U (en) * | 2010-12-15 | 2011-08-17 | 上海市基础工程有限公司 | Double-layer steel sleeve for drilled pile static load test |
| CN102628269A (en) * | 2012-04-27 | 2012-08-08 | 河海大学 | Technical device for reducing negative frictional resistance on driven cast-in-place pile, and application method thereof |
| CN203008002U (en) * | 2012-12-18 | 2013-06-19 | 上海建工四建集团有限公司 | Double-layer sleeve used on non-friction segment of test pile of pressure-resisting bored pile |
| CN204112378U (en) * | 2014-08-21 | 2015-01-21 | 中建三局第二建设工程有限责任公司 | A kind of two casing device of pile measurement with emulation buffer action |
| CN106948390A (en) * | 2017-05-24 | 2017-07-14 | 深圳宏业基岩土科技股份有限公司 | The double casing structures detected for test pile |
| CN207567836U (en) * | 2017-11-20 | 2018-07-03 | 中建一局集团建设发展有限公司 | Compression test stake ess-strain comprehensive detection system |
| CN207739255U (en) * | 2017-11-29 | 2018-08-17 | 刘景霞 | A kind of double-walled support steel pile casting |
| CN108425383A (en) * | 2018-03-23 | 2018-08-21 | 深圳市工勘岩土集团有限公司 | The construction method of side friction is isolated in test pile |
| CN110206024A (en) * | 2019-05-07 | 2019-09-06 | 中建八局第二建设有限公司 | A kind of method and structure for eliminating bored concrete pile side frictional resistance |
-
2021
- 2021-09-02 CN CN202111026234.XA patent/CN113513019A/en not_active Withdrawn
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004204588A (en) * | 2002-12-26 | 2004-07-22 | Chiken Co Ltd | Geological sampler |
| CN201933516U (en) * | 2010-12-15 | 2011-08-17 | 上海市基础工程有限公司 | Double-layer steel sleeve for drilled pile static load test |
| CN102628269A (en) * | 2012-04-27 | 2012-08-08 | 河海大学 | Technical device for reducing negative frictional resistance on driven cast-in-place pile, and application method thereof |
| CN203008002U (en) * | 2012-12-18 | 2013-06-19 | 上海建工四建集团有限公司 | Double-layer sleeve used on non-friction segment of test pile of pressure-resisting bored pile |
| CN204112378U (en) * | 2014-08-21 | 2015-01-21 | 中建三局第二建设工程有限责任公司 | A kind of two casing device of pile measurement with emulation buffer action |
| CN106948390A (en) * | 2017-05-24 | 2017-07-14 | 深圳宏业基岩土科技股份有限公司 | The double casing structures detected for test pile |
| CN207567836U (en) * | 2017-11-20 | 2018-07-03 | 中建一局集团建设发展有限公司 | Compression test stake ess-strain comprehensive detection system |
| CN207739255U (en) * | 2017-11-29 | 2018-08-17 | 刘景霞 | A kind of double-walled support steel pile casting |
| CN108425383A (en) * | 2018-03-23 | 2018-08-21 | 深圳市工勘岩土集团有限公司 | The construction method of side friction is isolated in test pile |
| CN110206024A (en) * | 2019-05-07 | 2019-09-06 | 中建八局第二建设有限公司 | A kind of method and structure for eliminating bored concrete pile side frictional resistance |
Non-Patent Citations (1)
| Title |
|---|
| 蒋牧等: "清摩阻双护筒在超长试桩中的应用", 《施工技术》, no. 21, 10 November 2017 (2017-11-10) * |
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Application publication date: 20211019 |