CN201933516U - Double-layer steel sleeve for drilled pile static load test - Google Patents
Double-layer steel sleeve for drilled pile static load test Download PDFInfo
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- CN201933516U CN201933516U CN 201020659539 CN201020659539U CN201933516U CN 201933516 U CN201933516 U CN 201933516U CN 201020659539 CN201020659539 CN 201020659539 CN 201020659539 U CN201020659539 U CN 201020659539U CN 201933516 U CN201933516 U CN 201933516U
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- inner sleeve
- sleeve
- static load
- outer tube
- load test
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Abstract
The utility model relates to a double-layer steel sleeve for a drilled pile static load test, comprising an inner sleeve and an outer sleeve. An annular supporting rib plate is arranged between the inner sleeve and the outer sleeve; an annular rubber water stop tie is arranged between the bottom of the outer sleeve and the inner sleeve; and a contractive opening at the bottom of the outer sleeve is tightly attached with the water stop tie. The thickness of the walls of the inner sleeve and the outer sleeve is 12mm; the inner diameter d1 of the inner sleeve is equal to the diameter d of a testing pile plus 50mm; the inner diameter d2 of the outer sleeve is equal to the diameter d of the testing pile plus 160mm; the length h1 of the inner sleeve is equal to the cutting depth h of a base pit plus 5m; the length h2 of the outer sleeve is equal to the cutting depth of the base pit; in installation, the upper openings of the inner sleeve and the outer sleeve are parallel and level with each other; for the supporting rib plate, the thickness is 20mm, the height is 40mm, and the spacing is 5000mm; and the water stop tie is as wide as 50mm and as thick as 10mm. For the composite steel sleeve, the accuracy of the static load test can be greatly enhanced, more precise foundation can be provided for pile type design, and the safety and economy of a construction project can be improved.
Description
Technical field
The utility model relates to a kind of construction and checkout gear of bored pile test pile, and is especially a kind of at bored pile test pile apparatus used in the deep-foundation pit engineering.
Background technology
When highrise building adopted bored pile foundation, effective length all was in below the excavation face, but test pile must water to ground, carried out test pile static load test chamber and must deduct the above pile side friction of excavation face, can accurately calculate the load-carrying ability of effective length.Method commonly used at present is that the above test pile pile side friction of excavation face is estimated, deducted then, yet estimation for accuracy is received the restriction of a plurality of factors.(1) one of Gu Suan main foundation is geologic prospect report, but since the stratum rise and fall and reconnoitre aspects such as error problem test pile position actual geological condition with reconnoitre report and have certain deviation unavoidably; (2) two of Gu Suan main foundation is areas of rubbing surface between a side and the soil body, its friction area is that the result by aperture test estimates gained, but also there is certain deviation in the data that the external surface actual conditions of pile body pouring after finishing and pore-forming aperture are tested.
Along with the contradiction between urban development and the land resources becomes increasingly conspicuous, the urban underground space development and use become more and more important, and the degree of depth of underground space development and area are also in continuous development.The newly-built basement in high rise building in urban district, current Shanghai is all more than three layers, four layers and five layers of basement are also of common occurrence, for example the basement of center, Shanghai mansion just reaches underground five floor, and the main building excavation of foundation pit degree of depth reaches 31m, and big cutting depth of podium foundation ditch also reaches 26m.Test buried depth that will be more accurate must be eliminated the test pile pile side friction influence in the 26m scope of top relatively accurately at the load of the effective length of the following degree of depth of 26m.
Summary of the invention
The utility model is that a kind of drilled pile static load test clad steel sleeve pipe will be provided, by the relative slip between the clad steel sleeve pipe, eliminate the test pile pile side friction in the non-effective length scope, avoid estimation error, improve the degree of accuracy of static load test, for the design of follow-up stake type provides more accurate foundation, the safety and the economy of promoting engineering construction project there is positive meaning.
For achieving the above object, the technical solution of the utility model is: a kind of drilled pile static load test clad steel sleeve pipe, comprise inner sleeve and outer tube, be characterized in: be provided with the annular brace floor between inner sleeve and the outer tube, the ring-shaped rubber waterstop is set between outer sleeve bottom and the inner sleeve, and outer sleeve bottom closes up closely connected with the ring-shaped rubber waterstop.
Inner sleeve and outer tube wall thickness are 12mm; Inner sleeve inner diameter d 1=test pile diameter d+50mm, outer tube inner diameter d 2=test pile diameter d+160mm; Inner sleeve length h1=excavation of foundation pit degree of depth h+5m, outer tube length h2=excavation of foundation pit degree of depth h; During installation, inner sleeve is suitable for reading concordant with outer tube; Ribs plate thickness 20mm, height 40mm, ribs distance between plates 5000mm; Ring-shaped rubber sealing bandwidth 50mm, thick 10mm.
The beneficial effects of the utility model are:
The utility model adopts inside and outside clad steel sleeve structure, connects with the annular brace floor between inner sleeve and the outer tube, seals with the ring-shaped rubber waterstop between outer sleeve bottom and the inner sleeve.And be installed on in the non-effective length scope of the test pile more than the excavation of foundation pit face, can need to satisfy following instructions for use:
1. can be free to slide between the clad steel sleeve pipe, can eliminate the purpose of pile side friction;
2. between the clad steel sleeve pipe secure support is arranged, avoid occurring the pile body unstable phenomenon;
3. can prevent that concrete from entering between the clad steel sleeve pipe in the pouring process, influence is free to slide;
4. the clad steel cannula configuration is simple, is convenient to make and installation.
The utility model can significantly improve the degree of accuracy of static load test, for the design of stake type provides more accurate foundation, promotes the safety and the economy of object of construction production.
Description of drawings
Fig. 1 is a clad steel sleeve pipe longitudinal plan of the present utility model;
Fig. 2 is an annular brace floor node diagram;
Fig. 3 is a ring-shaped rubber waterstop node diagram.
The specific embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is further described.
As shown in Figure 1, drilled pile static load test clad steel sleeve pipe of the present utility model comprises inner sleeve 1, outer tube 2, annular brace floor 3, ring-shaped rubber waterstop 4.
Clad steel sleeve design form is as follows:
(1) the clad steel sleeve pipe is made of inner sleeve 1 and outer tube 2 two parts, and wall thickness is 12mm;
(2) test pile diameter d, inner sleeve 1 internal diameter is d1=d+50mm, outer tube 2 internal diameters are d2=d+160mm;
(3) the excavation of foundation pit degree of depth (non-effective length) h, inner sleeve 1 length h1=h+5m, outer tube 2 length h2=h; Bilayer sleeve is suitable for reading concordant during installation;
(4) annular brace floor 3(Fig. 2 is set between the clad steel sleeve pipe), support floor 3 thickness 20mm, height 40mm, support floor 3 spacing 5000mm;
(5) ring-shaped rubber waterstop 4(Fig. 3 is set between outer tube 2 bottoms and the inner sleeve 1), be used to stop concrete to enter sliding space, ring-shaped rubber waterstop 4 wide 50mm, thick 10mm, outer tube 2 bottoms are closed up closely connected with it.
Construct altogether four groups of test piles of center, Shanghai mansion stake type test, test pile diameter 1000mm, pile degree of depth 88m, effective length 52m, non-effective length reaches 26m, and the test pile static load test loads limiting value 30000KN.For satisfying the test pile measuring accuracy, design and implemented the clad steel sleeve technology targetedly.The clad steel sleeve pipe of four groups of test piles has all been realized relative slip smoothly in the static load test process, and the pile body in the 26m scope is stable, other abnormal conditions do not occur, and the testing result precision meets design requirement.
Through the enforcement of center, Shanghai mansion driving analysis test on piles, prove that fully this technology can eliminate side friction in the non-effective length preferably, avoid estimation error.This technology has reached the purpose of effectively guaranteeing the static load test accuracy, carries out the design of type reliable foundation is provided for follow-up, and help the safety and the economy of engineering.
Claims (5)
1. drilled pile static load test clad steel sleeve pipe, comprise inner sleeve (1) and outer tube (2), it is characterized in that: be provided with annular brace floor (3) between described inner sleeve (1) and the outer tube (2), between outer tube (2) bottom and the inner sleeve (1) ring-shaped rubber waterstop (4) is set, and outer tube (2) bottom is closed up closely connected with ring-shaped rubber waterstop (4).
2. drilled pile static load test clad steel sleeve pipe according to claim 1 is characterized in that: described inner sleeve (1) and outer tube (2) wall thickness are 12mm; Inner sleeve (1) inner diameter d 1=test pile diameter d+50mm, outer tube (2) inner diameter d 2=test pile diameter d+160mm; Inner sleeve length h1=excavation of foundation pit degree of depth h+5m, outer tube length h2=excavation of foundation pit degree of depth h.
3. drilled pile static load test clad steel sleeve pipe according to claim 1 is characterized in that: during installation, described inner sleeve (1) is suitable for reading concordant with outer tube (2).
4. drilled pile static load test clad steel sleeve pipe according to claim 1 is characterized in that: described support floor (3) thickness is 20mm, highly is 40mm that supporting floor (3) spacing is 5000mm.
5. drilled pile static load test clad steel sleeve pipe according to claim 1 is characterized in that: described ring-shaped rubber supports the wide 50mm of being of waterstop (4), the thick 10mm of being.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020659539 CN201933516U (en) | 2010-12-15 | 2010-12-15 | Double-layer steel sleeve for drilled pile static load test |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201020659539 CN201933516U (en) | 2010-12-15 | 2010-12-15 | Double-layer steel sleeve for drilled pile static load test |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201933516U true CN201933516U (en) | 2011-08-17 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201020659539 Expired - Lifetime CN201933516U (en) | 2010-12-15 | 2010-12-15 | Double-layer steel sleeve for drilled pile static load test |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201933516U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105019485A (en) * | 2015-08-11 | 2015-11-04 | 中国电建集团华东勘测设计研究院有限公司 | Static load test detection method for foundation pit excavation pile foundation |
| CN105297792A (en) * | 2015-10-27 | 2016-02-03 | 山西省第三建筑工程公司 | Deep hole pile foundation bearing capacity testing device |
| CN108824506A (en) * | 2018-07-26 | 2018-11-16 | 深圳市中地建设工程有限公司 | Long section of frictional resistance of the non-effective stake of uplift pile eliminates structure |
| CN113513019A (en) * | 2021-09-02 | 2021-10-19 | 中建八局第二建设有限公司 | Double pile casing for pile foundation detection and use method thereof |
-
2010
- 2010-12-15 CN CN 201020659539 patent/CN201933516U/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105019485A (en) * | 2015-08-11 | 2015-11-04 | 中国电建集团华东勘测设计研究院有限公司 | Static load test detection method for foundation pit excavation pile foundation |
| CN105019485B (en) * | 2015-08-11 | 2017-03-01 | 中国电建集团华东勘测设计研究院有限公司 | A kind of excavation of foundation pit dead load test on pile foundation detection method |
| CN105297792A (en) * | 2015-10-27 | 2016-02-03 | 山西省第三建筑工程公司 | Deep hole pile foundation bearing capacity testing device |
| CN108824506A (en) * | 2018-07-26 | 2018-11-16 | 深圳市中地建设工程有限公司 | Long section of frictional resistance of the non-effective stake of uplift pile eliminates structure |
| CN113513019A (en) * | 2021-09-02 | 2021-10-19 | 中建八局第二建设有限公司 | Double pile casing for pile foundation detection and use method thereof |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHANGHAI FOUNDATION ENGINEERING GROUP CO., LTD. Free format text: FORMER NAME: SHANGHAI FOUNDATION ENGINEERING CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 200433 Yangpu District, Shanghai Star Road, No. 231 Patentee after: Shanghai Foundation Engineering Group Co., Ltd. Address before: 200433 Yangpu District, Shanghai Star Road, No. 231 Patentee before: Shanghai Foundation Engineering Co., Ltd. |
|
| CX01 | Expiry of patent term |
Granted publication date: 20110817 |
|
| CX01 | Expiry of patent term |