CN203808069U - Recyclable umbrella-like bearing ground anchor for use in soft soil stratum - Google Patents
Recyclable umbrella-like bearing ground anchor for use in soft soil stratum Download PDFInfo
- Publication number
- CN203808069U CN203808069U CN201420255830.4U CN201420255830U CN203808069U CN 203808069 U CN203808069 U CN 203808069U CN 201420255830 U CN201420255830 U CN 201420255830U CN 203808069 U CN203808069 U CN 203808069U
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- China
- Prior art keywords
- umbrella
- anchor
- pipe
- soft soil
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- Withdrawn - After Issue
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Abstract
A recyclable umbrella-like bearing ground anchor for use in a soft soil stratum comprises a supporting pile for foundation pit engineering. A reinforced concrete cap beam is arranged at the top of the supporting pile and is penetrated by an anchor pull bar. One end of the anchor pull bar is provided with a threaded portion, and the other end of the anchor pull bar is connected with an anchor bolt. The threaded portion of the anchor pull bar penetrates the reinforced concrete cap beam and is fixed to the same via a tightening nut. The anchor bolt comprises a cover and ribs; the cover is a bag made by sewing fiber cloth, the bottom of the bag is square, a long fiber cloth strip is sewn to each corner of the bag, a plurality of spacers are arranged at each corner of the bag, the ribs penetrate the spacers, a grouting pipe and a short pipe are connected through the bag, the bag is tied to the grouting pipe and the short pipe through fiber cords, the lower end of the short pipe is inserted into a rod hanging pipe and is welded integrally, the rod hanging pipe is provided with a plurality of round ducts, and the ribs are disposed into the round ducts. The recyclable umbrella-like bearing ground anchor has an excellent function of keeping constant uplift resistance and is more reliable and safer to use in foundation pit engineering.
Description
Technical field
The utility model relates to the basement construction base pit engineering of soft soil layer in a kind of civil construction project, especially relates 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
Along with the fast development of 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 ensure 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, in foundation ditch, establish and support the space that has taken earthwork construction, 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 realizes the anchor pulling force of anchor pole with the girth area of bolt diameter and native frictional resistance form; All reducing gradually according to the anchor pulling force of the anchor pole of applying in weak soil creep properties engineering, 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, increasing by the foundation pit deformation of uplift resistance, 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 detection; Increase pulling capacity as continued 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 specification, 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.
Utility model content
Technical problem to be solved in the utility model 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 utility model 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, comprise the soldier pile of 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 entirety 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 umbrella cover and umbrella frame composition, 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 multiple 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.
The utility model construction sequence is:
The first step, determines the spacing of boring by requirements of design anchor pulling force, pierce soil layer with drilling rod, and in drilling rod, removing enters the weak soil in pipe;
Second step, connects into a straight-bar by described anchor tie and described crab-bolt, inserts in drilling rod the end of to;
The 3rd step, extracts drilling rod, and described anchor tie and described crab-bolt are stayed in soil layer;
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 not watered together by concrete 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 in described crab-bolt, 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 utility model has the advantage of: there is the constant uplift resistance performance of excellent maintenance, thereby greatly promoted dependability and the safety of base pit engineering.
Brief description of the drawings
Fig. 1 the utility model structural representation;
The crab-bolt schematic diagram that Fig. 2 the utility model launches after slip casing by pressure;
Fig. 3 the utility model umbrella frame structure schematic diagram;
Fig. 4 is the A-A direction view of Fig. 3;
Fig. 5 umbrella pressure-bearing earth anchor construction sequence schematic diagram;
Detailed description of the invention
Below in conjunction with accompanying drawing, embodiment is described in further detail the utility model.
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 fine strain of millet 2 of stake of this soldier pile is linked to be entirety and sealing continuously, and they form the retaining structure of this base pit engineering;
Must ensure the stable of supporting and protection structure with inner support or anchor structure owing to cutting the earth in described foundation ditch, this anchor structure is made up 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 umbrella cover and umbrella stand composition; 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 by cordage 12, as shown in Figure 2; 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 in the notch 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, treat next engineering application to reclaim;
By tube connector 4, anchor tie 3 is connected with the crab-bolt before slip casting, insertion pierces in the borehole casing of soil layer with rig; Exit borehole casing, the volume that is crab-bolt 20 by pocket 10 expansion is determined slurries amount, in slurries inject anchor tie 3 steel pipes time, the pocket 10 of the crab-bolt that the pressure of slurries is opened end slowly launches to be umbrella crab-bolt 20, now drive umbrella frame 9 to launch by spacer sleeve 11, in the time that the slurries that inject reach intensity, umbrella frame 9 is subject to lacing wire effect to ensure that anchor draws uplift resistance, for the slurries that ensure to inject are all in the pocket 10 of cloth bag of sealing, must be by sealing steel plate 7 solder ups of peg pipe 5.
Construction sequence of the present utility model is:
The first step, horizontal inclined drill is determined the spacing of boring by requirements of design anchor pulling force, pierce soil layer with drilling rod, in drilling rod, removing enters the weak soil in pipe;
Second step, connects into a straight-bar by the crab-bolt of anchor tie and contraction, inserts in drilling rod the end of to;
The 3rd step, extracts drilling rod, and anchor tie and crab-bolt are stayed in soil layer;
The 4th step, is first inserted in resistance to plucking bar 3 with plastic bushing 21 when construction bent cap 2, and this casing off resistance to plucking bar makes not watered together by concrete, 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 in crab-bolt, 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.
The utility model umbrella pressure-bearing earth anchor 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 affected uplift resistance by the creeping property of weak soil.
Claims (5)
1. callable umbrella pressure-bearing earth anchor in a soft soil layer, it is characterized in that, comprise the soldier pile (1) of 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 entirety 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 umbrella cover and umbrella frame composition, 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 multiple 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, it is also welded with this short tube that peg pipe (5) 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).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420255830.4U CN203808069U (en) | 2014-05-07 | 2014-05-07 | Recyclable umbrella-like bearing ground anchor for use in soft soil stratum |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420255830.4U CN203808069U (en) | 2014-05-07 | 2014-05-07 | Recyclable umbrella-like bearing ground anchor for use in soft soil stratum |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203808069U true CN203808069U (en) | 2014-09-03 |
Family
ID=51446849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420255830.4U Withdrawn - After Issue CN203808069U (en) | 2014-05-07 | 2014-05-07 | Recyclable umbrella-like bearing ground anchor for use in soft soil stratum |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203808069U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967011A (en) * | 2014-05-07 | 2014-08-06 | 孔超 | Recyclable umbrella-shaped pressure-bearing ground anchor in soft soil stratum |
| CN106053333A (en) * | 2016-06-15 | 2016-10-26 | 浙江海洋大学 | Hard fiber insertion device |
-
2014
- 2014-05-07 CN CN201420255830.4U patent/CN203808069U/en not_active Withdrawn - After Issue
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103967011A (en) * | 2014-05-07 | 2014-08-06 | 孔超 | Recyclable umbrella-shaped pressure-bearing ground anchor in soft soil stratum |
| CN103967011B (en) * | 2014-05-07 | 2015-12-09 | 孔超 | Callable umbrella pressure-bearing earth anchor in a kind of soft soil layer |
| CN106053333A (en) * | 2016-06-15 | 2016-10-26 | 浙江海洋大学 | Hard fiber insertion device |
| CN106053333B (en) * | 2016-06-15 | 2018-12-04 | 浙江海洋大学 | Hard fibre insertion apparatus |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140903 Effective date of abandoning: 20151209 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |