CN103967011A - Recyclable umbrella-shaped pressure-bearing ground anchor in soft soil stratum - Google Patents
Recyclable umbrella-shaped pressure-bearing ground anchor in soft soil stratum Download PDFInfo
- Publication number
- CN103967011A CN103967011A CN201410210998.8A CN201410210998A CN103967011A CN 103967011 A CN103967011 A CN 103967011A CN 201410210998 A CN201410210998 A CN 201410210998A CN 103967011 A CN103967011 A CN 103967011A
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- Prior art keywords
- umbrella
- anchor
- bolt
- crab
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- 239000002689 soil Substances 0.000 title claims abstract description 38
- 239000004744 fabric Substances 0.000 claims abstract description 12
- 125000006850 spacer group Chemical group 0.000 claims abstract description 9
- 238000010276 construction Methods 0.000 claims description 16
- 238000005553 drilling Methods 0.000 claims description 12
- 239000002002 slurry Substances 0.000 claims description 10
- 244000062793 Sorghum vulgare Species 0.000 claims description 8
- 235000019713 millet Nutrition 0.000 claims description 8
- 238000009412 basement excavation Methods 0.000 claims description 6
- 239000004568 cement Substances 0.000 claims description 6
- 238000013461 design Methods 0.000 claims description 6
- 229910000831 Steel Inorganic materials 0.000 claims description 5
- 239000010959 steel Substances 0.000 claims description 5
- 239000000284 extract Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 238000007569 slipcasting Methods 0.000 abstract description 6
- 239000011150 reinforced concrete Substances 0.000 abstract 2
- 239000000835 fiber Substances 0.000 abstract 1
- 238000009958 sewing Methods 0.000 abstract 1
- 238000011161 development Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 238000007789 sealing Methods 0.000 description 3
- 230000008602 contraction Effects 0.000 description 2
- 230000003467 diminishing effect Effects 0.000 description 2
- 239000004927 clay Substances 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Landscapes
- Piles And Underground Anchors (AREA)
Abstract
A recyclable umbrella-shaped pressure-bearing ground anchor in a soft soil stratum comprises a support pile of foundation pit engineering, the top of the support pile is provided with a reinforced concrete cover beam, and the support pile and the reinforced concrete cover beam are connected into a whole. An anchor tie penetrates through the cover beam, one end of the cover beam is provided with a threaded part, and the other end of the anchor tie is connected with an anchor bolt. The threaded part of the anchor tie penetrates through the cover beam, and the thread part and the cover beam are fixed by screwing a nut. The anchor bolt comprises an umbrella cover and umbrella ribs. The umbrella cover is a pocket formed by sewing fabric cloth, the bottom of the umbrella cover is square, the corners of the pocket are sewn with long-strip fabric cloth, and corner points of the pocket are provided with a plurality of spacer sleeves. The umbrella ribs penetrate through the spacer sleeves. The pocket is connected with a slip casting pipe and a short pipe. The pocket, the slip casting pipe and the short pipe are fastened through a fiber rope. The lower end of the short pipe is inserted into a hanging rod pipe, and the short pipe and the hanging rod pipe are welded into a whole. The hanging rod pipe is provided with a plurality of round hole grooves, and the umbrella ribs are installed in the round hole grooves. The recyclable umbrella-shaped pressure-bearing ground anchor has the advantages that the superior and constant pulling resistance performance is achieved, and the using reliability and the safety of the foundation pit engineering are improved.
Description
Technical field
The present invention relates to the basement construction base pit engineering of soft soil layer in a kind of civil construction project, especially relate to a kind of callable umbrella pressure-bearing earth anchor in the soft soil layer that substitutes foundation ditch Inner support that draws with anchor.
Background technology
Fast development along with nation-building and urbanization, the car owning amount in city increases severely, cause the stifled resistance of urban road and parking difficulty problem, in housing estate development, must keep the parking stall area of each household, all must be arranged in basement, how applying the underground space is the symbol that embodies national urban development, the available underground space for this reason, as square, greenery patches, road, buildings etc. are all built into basement by the available underground space below, for stopping, trade, market, the application such as amusement, the construction of basement must have corresponding base pit engineering, this base pit engineering just need a kind of umbrella pressure-bearing ground anchorage technology.
If the area of basement is increasing, large to tens thousand of to more than 10 ten thousand square metres, in foundation ditch, cannot establish inner support at all, must guarantee with anchor structure the stability and security of the space enclosing structure in base pit engineering, area is less also nearly ten thousand square metres, foundation ditch Inner establishes and supports the space that has taken earthwork construction, has affected excavation and construction and construction period in foundation ditch.
The slurry that has of application in the market assists anchor pole, callable slurry to assist anchor pole, cloth bag grouting anchor pole, soil nailing etc., all with the girth area of bolt diameter and native frictional resistance form, realizes the anchor pulling force of anchor pole; According to the anchor pulling force of the anchor pole of applying in weak soil creep properties engineering, all reducing gradually, known while the above-mentioned anchor scheme of drawing being carried out to uplift resistance detection in building site, when anchor pulling force detects tension to design uplift resistance, can not keep constant uplift resistance, but uplift resistance is diminishing gradually along with the prolongation of time, lean on the foundation pit deformation of uplift resistance increasing, and can not stablize, if want supplying by stretch-draw at the uplift resistance that diminishes gradually, and do not reach the design uplift resistance value while detecting; As continued, increase pulling capacity and just anchor pole is extracted to soil layer, the creeping property of weak soil is very large on the uplift resistance impact of anchor pole, press Design of Excavation Project standard, in weak soil, applying anchor pole must test by creep resisting resistance to plucking, resistance to plucking value is too little, and in engineering, conventional instantaneous uplift resistance value is dealt with, and in fact in weak soil, the uplift resistance of anchor pole is diminishing gradually, the displacement of foundation ditch is naturally just large, and uplift resistance lost efficacy and the safe consequence that jeopardizes foundation ditch even.
Summary of the invention
Technical problem to be solved by this invention is that callable umbrella pressure-bearing earth anchor in a kind of soft soil layer with the uplift resistance that keeps constant is provided for above-mentioned prior art present situation.
The present invention solves the problems of the technologies described above adopted technical scheme: callable umbrella pressure-bearing earth anchor in a kind of soft soil layer, it is characterized in that, the soldier pile that comprises base pit engineering, the stake top of this soldier pile is provided with steel bar concrete lid fine strain of millet and is linked to be integral body and seals continuously, in this lid fine strain of millet hole, be equipped with anchor tie, this anchor tie one end is provided with threaded portion, the other end connects crab-bolt, and this anchor tie threaded portion is through described lid fine strain of millet fixing with it with fastening nut; Described crab-bolt comprises that umbrella cover and umbrella frame form, this umbrella cover is the pocket of being made by cloth, this pocket bottom is square, the corner of this pocket is all made rectangular cloth and is strengthened, this pocket intersecting point is provided with a plurality of spacer sleeves, described umbrella frame penetrates in this spacer sleeve, and described pocket connects Grouting Pipe and short tube.
Described Grouting Pipe and described short tube are welded as a whole by junction plate.
Described pocket and described Grouting Pipe, described short tube are tightened by cordage.
It is welded that this short tube of peg Guan Bingyu is inserted in described short tube lower end; The same periphery of this peg pipe is provided with 4 circle hole grooves dividing equally, and described umbrella frame packs in this circle hole groove.
The termination of described umbrella frame is provided with the curved rib of tearing 90 degree open, and this rib inserts in the circle hole groove of described peg pipe.
Construction sequence of the present invention is:
The first step, determines the spacing of holing by the requirement of design anchor pulling force, with drilling rod, pierces soil layer, and drilling rod Inner removes and enters the weak soil in pipe;
Second step, connects into a straight-bar by described anchor tie and described crab-bolt, inserts drilling rod Inner the end of to;
The 3rd step, extracts drilling rod, and described anchor tie and described crab-bolt are stayed to soil layer Inner;
The 4th step, the described bent cap of constructing, is first inserted in described resistance to plucking bar with plastic bushing, and resistance to plucking bar makes by concrete, not watered together described in this casing off, is convenient to reclaim; Then mixing cement paste, its volume is by the actual volume (be equivalent to actual volume 95%) that is slightly less than described crab-bolt, and pressure injects slurries process the described crab-bolt of shrinking is slowly launched to be umbrella; Treat that described crab-bolt Inner cement paste reaches intensity, be screwed into described nut, its screwing force is the prestressing force applying;
The 5th step, after the complete and basement bottom board of soil excavation construction has been built, when soldier pile is not enough to stablize by anchor pulling force yet, the described nut of can back-outing, oppositely screws out described anchor tie and reclaim and treat that next engineering applies, and crab-bolt is forever stayed in soil layer.
Compared with prior art, the invention has the advantages that: there is the constant uplift resistance performance of excellent maintenance, thereby greatly promoted dependability and the safety of base pit engineering.
Accompanying drawing explanation
Fig. 1 structural representation of the present invention;
The crab-bolt schematic diagram that Fig. 2 the present invention launches after slip casing by pressure;
Fig. 3 umbrella frame structure schematic diagram of the present invention;
Fig. 4 is the A-A direction view of Fig. 3;
Fig. 5 umbrella pressure-bearing earth anchor construction sequence schematic diagram;
The specific embodiment
Below in conjunction with accompanying drawing, embodiment is described in further detail the present invention.
As shown in Fig. 1～Fig. 5, it adopts following structure particularly, comprises the soldier pile 1 of base pit engineering, and the very useful steel bar concrete lid of the stake fine strain of millet 2 of this soldier pile is linked to be integral body and sealing is continuous, and they form the retaining structure of this base pit engineering;
Owing to cutting the earth in described foundation ditch, must guarantee the stable of supporting and protection structure with inner support or anchor structure, this anchor structure is comprised of threaded anchor tie 3 and the crab-bolt 20 with umbrella frame structure; Anchor tie 3 is also tightened fixingly through cover fine strain of millet 2 with nut 22, this screwing force quite applies the prestressing force of anchor tie; As shown in Figure 1;
This crab-bolt 20 comprises that umbrella cover and umbrella stand form; This umbrella cover is the pocket 10 of being made by cloth, this pocket bottom is square, the corner of making of pocket 10 is all strengthened by rectangular cloth 13, the intersecting point of square pyramidal shaped is made spacer sleeve 11, umbrella frame 9 penetrates in spacer sleeve 11, the umbrella stand short tube 6 that is inserted in suitable for reading of pocket 10 is connected short tube 4 with slip casting, tighten, as shown in Figure 2 by cordage 12; This crab-bolt is the state of tightening up before slip casting, the umbrella of opening just like end;
This umbrella stand comprises slip casting tube connector 4 and short tube 6, and this tube connector and short tube are welded as a whole by junction plate 8; Peg pipe 5 is inserted in the lower end of short tube 6, and welded along Guan Zhouyu short tube, the same periphery of peg pipe 5 is provided with 4 circle hole grooves dividing equally, in this circle hole groove, be equipped with umbrella frame 9, the termination of umbrella frame 9 is provided with the curved rib of tearing 90 degree open, this rib inserts the notch Inner of peg pipe 5, and as shown in Figure 3, this umbrella stand is the crab-bolt umbrella of not opening while tightening up stand-by.
After base pit engineering completes, can oppositely twist and revolve anchor tie 3 and can depart from crab-bolt 20, to reclaim, treat next engineering application;
By tube connector 4, anchor tie 3 is connected with the crab-bolt before slip casting, inserts the borehole casing Inner that pierces soil layer with rig; Exit borehole casing, the volume that is crab-bolt 20 by pocket 10 expansion is determined slurries amount, in the time of in slurries inject anchor tie 3 steel pipes, the pocket 10 of the crab-bolt that the pressure of slurries is opened end slowly launches to be umbrella crab-bolt 20, now by spacer sleeve 11, drive umbrella frame 9 to launch, when the slurries that inject reach intensity, umbrella frame 9 is subject to lacing wire effect to guarantee that anchor draws uplift resistance, for the slurries that guarantee to inject are all at pocket 10 Inner of the cloth bag of sealing, must be by sealing steel plate 7 solder ups of peg pipe 5.
Construction sequence of the present invention is:
The first step, horizontal inclined drill is determined the spacing of boring by the requirement of design anchor pulling force, with drilling rod, pierce soil layer, drilling rod Inner removes and enters the weak soil in pipe;
Second step, connects into a straight-bar by the crab-bolt of anchor tie and contraction, inserts drilling rod Inner the end of to;
The 3rd step, extracts drilling rod, and anchor tie and crab-bolt are stayed to soil layer Inner;
The 4th step, is first inserted in resistance to plucking bar 3 with plastic bushing 21 during construction bent cap 2, and this casing off resistance to plucking bar makes by concrete, not watered together, is convenient to reclaim; Then mixing cement paste, its volume is by the actual volume (be equivalent to actual volume 95%) that is slightly less than crab-bolt 20, and pressure injects slurries process the crab-bolt of contraction is slowly launched to be umbrella; Treat that crab-bolt Inner cement paste reaches intensity, padded correcting wedge 23, be screwed into nut 22, its screwing force is the prestressing force applying; Umbrella pressure-bearing earth anchor is devoted oneself to work, in foundation ditch, can carry out soil excavation construction.
The 5th step, soil excavation construction is complete, and basement bottom board has been built, and when soldier pile is not enough to stablize by anchor pulling force yet, the nut of can back-outing, takes out correcting wedge, oppositely screw out the recovery of resistance to plucking bar and treat next engineering application, and crab-bolt is forever stayed in soil layer.
Umbrella pressure-bearing earth anchor of the present invention is similar to single footing under the pillar of house construction engineering and is bearing on soft foundation, and the axial pressure of pillar equals native bearing capacity value and the product of area of base; The uplift resistance of umbrella pressure-bearing earth anchor is the axial pressure of pillar, the intensity of weak soil is low, the distortion that high compression causes is large, this is also that characteristics of soft clay must be observed, but can adjust bearing area and meet the requirements of uplift resistance value, and be stable uplift resistance value, not on uplift resistance, affected by the creeping property of weak soil.
Claims (6)
1. callable umbrella pressure-bearing earth anchor in a soft soil layer, it is characterized in that, the soldier pile (1) that comprises base pit engineering, the stake top of this soldier pile is provided with steel bar concrete lid fine strain of millet (2) and is linked to be integral body and seals continuously, in this lid fine strain of millet (2) hole, be equipped with anchor tie (3), this anchor tie (3) one end is provided with threaded portion, the other end connects crab-bolt (20), and this anchor tie threaded portion is through described lid fine strain of millet (2) fixing with it with fastening nut (22); Described crab-bolt comprises that umbrella cover and umbrella frame form, this umbrella cover is the pocket (10) of being made by cloth, this pocket bottom is square, the corner of this pocket (10) is all made rectangular cloth (13) and is strengthened, this pocket intersecting point is provided with a plurality of spacer sleeves (11), described umbrella frame (9) penetrates in this spacer sleeve (11), and described pocket (10) connects Grouting Pipe (4) and short tube (6).
2. callable umbrella pressure-bearing earth anchor in soft soil layer according to claim 1, is characterized in that, described Grouting Pipe (4) is welded as a whole by junction plate (8) with described short tube (6).
3. callable umbrella pressure-bearing earth anchor in soft soil layer according to claim 1, is characterized in that, described pocket (10) is tightened by cordage (12) with described Grouting Pipe (4), described short tube (6).
4. callable umbrella pressure-bearing earth anchor in soft soil layer according to claim 3, is characterized in that, peg pipe (5) welded with this short tube is inserted in described short tube (6) lower end; The same periphery of this peg pipe is provided with 4 circle hole grooves dividing equally, and described umbrella frame (9) packs in this circle hole groove.
5. callable umbrella pressure-bearing earth anchor in soft soil layer according to claim 4, is characterized in that, the termination of described umbrella frame (9) is provided with the curved rib of tearing 90 degree open, and this rib inserts in the circle hole groove of described peg pipe (5).
6. according to callable umbrella pressure-bearing earth anchor in soft soil layer described in claim 1-5, its construction sequence is:
The first step, determines the spacing of holing by the requirement of design anchor pulling force, with drilling rod, pierces soil layer, and drilling rod Inner removes and enters the weak soil in pipe;
Second step, connects into a straight-bar by described anchor tie and described crab-bolt, inserts drilling rod Inner the end of to;
The 3rd step, extracts drilling rod, and described anchor tie and described crab-bolt are stayed to soil layer Inner;
The 4th step, the described bent cap of constructing, is first inserted in described resistance to plucking bar with plastic bushing, and resistance to plucking bar makes by concrete, not watered together described in this casing off, is convenient to reclaim; Then mixing cement paste, its volume is by the actual volume (be equivalent to actual volume 95%) that is slightly less than described crab-bolt, and pressure injects slurries process the described crab-bolt of shrinking is slowly launched to be umbrella; Treat that described crab-bolt Inner cement paste reaches intensity, be screwed into described nut, its screwing force is the prestressing force applying;
The 5th step, after the complete and basement bottom board of soil excavation construction has been built, when soldier pile is not enough to stablize by anchor pulling force yet, the described nut of can back-outing, oppositely screws out described anchor tie and reclaim and treat that next engineering applies, and crab-bolt is forever stayed in soil layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410210998.8A CN103967011B (en) | 2014-05-07 | 2014-05-07 | Callable umbrella pressure-bearing earth anchor in a kind of soft soil layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410210998.8A CN103967011B (en) | 2014-05-07 | 2014-05-07 | Callable umbrella pressure-bearing earth anchor in a kind of soft soil layer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103967011A true CN103967011A (en) | 2014-08-06 |
| CN103967011B CN103967011B (en) | 2015-12-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410210998.8A Active CN103967011B (en) | 2014-05-07 | 2014-05-07 | Callable umbrella pressure-bearing earth anchor in a kind of soft soil layer |
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| CN (1) | CN103967011B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178100A (en) * | 2016-03-12 | 2017-09-19 | 温州设计集团有限公司 | A kind of soft soil foundation basement anti-floating system and its construction technology |
| CN110725306A (en) * | 2019-10-31 | 2020-01-24 | 上海长凯岩土工程有限公司 | Construction method for forming oblique stress body by using rigid insert |
| CN110725304A (en) * | 2019-10-31 | 2020-01-24 | 上海长凯岩土工程有限公司 | Construction method for forming oblique stressed body by combining rigid insert and rotary spraying type reinforcement body |
| CN110725303A (en) * | 2019-10-31 | 2020-01-24 | 上海长凯岩土工程有限公司 | Construction method of oblique stressed body of rigid insert combined with guniting stirring reinforcing body |
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|---|---|---|---|---|
| CN2274653Y (en) * | 1996-11-27 | 1998-02-18 | 福建建专基础工程公司 | Umbrella type anchor pin |
| CN1193677A (en) * | 1997-03-19 | 1998-09-23 | 张继红 | Umbrella type anchor |
| CN2589515Y (en) * | 2002-12-04 | 2003-12-03 | 徐德修 | Ground anchor having anchoring force |
| JP4235661B2 (en) * | 2006-09-29 | 2009-03-11 | 黒沢建設株式会社 | Ground anchor and ground anchor method |
| CN103132521A (en) * | 2013-03-21 | 2013-06-05 | 中国海洋大学 | Undersea suction anchor |
| CN203808069U (en) * | 2014-05-07 | 2014-09-03 | 孔超 | Recyclable umbrella-like bearing ground anchor for use in soft soil stratum |
-
2014
- 2014-05-07 CN CN201410210998.8A patent/CN103967011B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2274653Y (en) * | 1996-11-27 | 1998-02-18 | 福建建专基础工程公司 | Umbrella type anchor pin |
| CN1193677A (en) * | 1997-03-19 | 1998-09-23 | 张继红 | Umbrella type anchor |
| CN2589515Y (en) * | 2002-12-04 | 2003-12-03 | 徐德修 | Ground anchor having anchoring force |
| JP4235661B2 (en) * | 2006-09-29 | 2009-03-11 | 黒沢建設株式会社 | Ground anchor and ground anchor method |
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| CN203808069U (en) * | 2014-05-07 | 2014-09-03 | 孔超 | Recyclable umbrella-like bearing ground anchor for use in soft soil stratum |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107178100A (en) * | 2016-03-12 | 2017-09-19 | 温州设计集团有限公司 | A kind of soft soil foundation basement anti-floating system and its construction technology |
| CN110725306A (en) * | 2019-10-31 | 2020-01-24 | 上海长凯岩土工程有限公司 | Construction method for forming oblique stress body by using rigid insert |
| CN110725304A (en) * | 2019-10-31 | 2020-01-24 | 上海长凯岩土工程有限公司 | Construction method for forming oblique stressed body by combining rigid insert and rotary spraying type reinforcement body |
| CN110725303A (en) * | 2019-10-31 | 2020-01-24 | 上海长凯岩土工程有限公司 | Construction method of oblique stressed body of rigid insert combined with guniting stirring reinforcing body |
| CN110725304B (en) * | 2019-10-31 | 2021-06-18 | 上海长凯岩土工程有限公司 | Construction method for forming oblique stressed body by combining rigid insert and rotary spraying type reinforcement body |
| CN110725306B (en) * | 2019-10-31 | 2021-08-27 | 上海长凯岩土工程有限公司 | Construction method for forming oblique stress body by using rigid insert |
| CN110725303B (en) * | 2019-10-31 | 2021-08-27 | 上海长凯岩土工程有限公司 | Construction method of oblique stressed body of rigid insert combined with guniting stirring reinforcing body |
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| Publication number | Publication date |
|---|---|
| CN103967011B (en) | 2015-12-09 |
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Effective date of registration: 20161221 Address after: 315012 Haishu City, Zhejiang Province, the new road, No. 496, No. Patentee after: ZHEJIANG HUAZHAN INSTITUTE OF ENGINEERING RESEARCH AND DESIGN Address before: 315040 Zhejiang city of Ningbo province high tech Zone Xiang Yun Lu East Trade Center Room 14-2 No. 100 Patentee before: Kong Chao |
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Address after: 315000 No.496, Xindian Road, Haishu District, Ningbo City, Zhejiang Province Patentee after: Zhejiang Huazhan Research and Design Institute Co.,Ltd. Address before: No. 496 Xindian Road, Haishu District, Ningqian City, Zhejiang Province, 315012 Patentee before: ZHEJIANG HUAZHAN INSTITUTE OF ENGINEERING RESEARCH AND DESIGN |