CN208899492U - Composite supporting construction for soft soil foundation pit - Google Patents
Composite supporting construction for soft soil foundation pit Download PDFInfo
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- CN208899492U CN208899492U CN201821192366.3U CN201821192366U CN208899492U CN 208899492 U CN208899492 U CN 208899492U CN 201821192366 U CN201821192366 U CN 201821192366U CN 208899492 U CN208899492 U CN 208899492U
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- bolt body
- foundation pit
- strut
- anchor pole
- soft soil
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Abstract
The utility model discloses a kind of composite supporting constructions for soft soil foundation pit, belong to Base hole supporting technology field, it is intended to provide a kind of composite supporting construction of soft soil foundation pit for improving suspension roof support stability, to solve the problems, such as that conventional anchor supporting foundation pit is unstable, its key points of the technical solution are that, including foundation pit, the anchoring wall being set in excavation slope, several anchor poles are equipped in the foundation pit, one end that the anchor pole oblique cutting enters excavation slope is anchored on anchoring wall；The anchor pole includes bolt body and the anchor pole casing that is detachably connected in bolt body, the bolt body is hollow pipe, the side wall of the bolt body is equipped with strut that is several circumferentially distributed and being located in anchor pole casing, the strut and bolt body sliding connect, and the drive rod for driving strut to stretch out is equipped in the bolt body.The utility model is suitable for pattern foundation pit supporting structure.
Description
Technical field
The utility model relates to Base hole supporting technology field, in particular to a kind of composite support knot for soft soil foundation pit
Structure.
Background technique
Soft clay area, the Delta Area of espespecially each estuary, the creep properties of soil property and mobility are fairly obvious.
And since such area is the economy, culture, frontier area of scientific and technological development position of height, infrastructure is also carried out extensively.In basic work
Cheng Zhong when the excavation pit of soft clay area, in order to guarantee the construction of underground structure and the safety of foundation pit surrounding environment, is needed to foundation pit
Side wall and surrounding enviroment take the measure of supporting and reinforcing.
Notification number is the Chinese patent of CN201406687Y, which disclose a kind of deep foundation pit supporting structure, including it is more
Root mini pile is arranged in juxtaposition the braced wall to be formed, and anchor cable and fixed body, one end of anchor cable are provided on the inside of the supporting of braced wall
It is connected on mini pile, the other end is connected on fixed body.
When conventional anchor carries out supporting to foundation pit, since weak soil physico-mechanical properties are poor, branch mask of the fixed body to the soil body
Product it is smaller, cause be set to soil layer in fixed body anti-pulling capacity it is lower, deformation it is larger, influence the supporting stability of foundation pit.
Utility model content
The purpose of the utility model is to provide a kind of composite supporting constructions for soft soil foundation pit, have and improve suspension roof support
The advantages of stability.
The above-mentioned technical purpose of the utility model has the technical scheme that
A kind of composite supporting construction for soft soil foundation pit, it is described including foundation pit, the anchoring wall being set in excavation slope
Several anchor poles are equipped in foundation pit, one end that the anchor pole oblique cutting enters excavation slope is anchored on anchoring wall；
The anchor pole includes bolt body and the anchor pole casing that is detachably connected in bolt body, and the bolt body is
Hollow pipe, the side wall of the bolt body are equipped with strut that is several circumferentially distributed and being located in anchor pole casing, the strut
It slides and connects with bolt body, the drive rod for driving strut to stretch out is equipped in the bolt body.
By using above-mentioned technical proposal, anchor pole is inserted between anchoring wall and foundation pit, along bolt body length direction
Anchor pole casing is taken out, drive rod is penetrated in bolt body, drives strut further to stretch out bolt body, foundation pit soil layer is in gravity
Under the action of, it is contacted with the strut on bolt body side wall, strut increases contact of the bolt body with soil layer in soil layer
Area makes bolt body is stable to be installed in foundation pit, enhances bolt body to the supporting effect of foundation pit soil layer.
Further, the bolt body is far from being fixedly connected with anchor pole tip, the anchor pole on one end of excavation slope
The tapered setting in tip, outer wall ring of the bolt body close to anchor pole tip, which is set, is fixed with flight.
By using above-mentioned technical proposal, when anchor pole being pushed to enter foundation pit, anchor pole and foundation pit soil layer are reduced in anchor pole tip
Contact area, the setting of flight facilitate anchor pole and are inserted into foundation pit in a manner of screwing in.
Further, the bolt body is fixed with stop collar, the stop collar on one end side wall of flight
Side positioned at flight far from anchor pole tip；
The stop collar is provided with annular groove away from the side at anchor pole tip, and the anchor pole casing threads is connected to annular groove.
By using above-mentioned technical proposal, anchor pole casing and bolt body plug connection, after anchor pole is inserted into foundation pit, along anchor
Bar body length direction rotates anchor pole casing, skids off anchor pole casing out of annular groove, facilitates and takes out anchor pole casing.
Further, the drive rod fitting is set in bolt body, and the drive rod protrudes into one end of bolt body
It is provided with driving tip, the tapered setting in the driving tip；
The mounting hole for strut grafting is offered in the bolt body, the strut protrudes into one end setting of bolt body
There is the driving inclined-plane being bonded with driving tip；
The strut is connect by installation axle with mounting hole, the glide direction for being axially perpendicular to strut of the installation axle,
The installation axle is fixed in bolt body, and the stroke hole for installation axle sliding is offered on the strut.
By using above-mentioned technical proposal, drive rod to be inserted into bolt body, driving tip is agreed with driving inclined-plane, with
Being further inserted into for drive rod, driving tip driving strut be further pierced by bolt body and pierce foundation pit side-wall, make anchor pole sheet
The more stable supporting foundation pit of body.
Further, screw hole is offered in the bolt body, the installation axle passes through screw hole and is plugged in stroke hole,
The end of the installation axle is threadedly coupled with screw hole, and the installation axle is located in the wall thickness of bolt body.
By using above-mentioned technical proposal, the on-site assembly of strut is facilitated, strut can be assembled at the construction field (site),
It is more convenient.
Further, be provided between the anchor pole internal surface of sleeve pipe and bolt body outer wall it is pre- interspace, the anchor sleeve
The outer diameter of pipe is less than the outer diameter of flight；
The strut is provided with the insertion end of cone cell away from one end of driving inclined-plane.
By using above-mentioned technical proposal, the setting to interspace in advance has reserved certain space for strut, so that strut is long
Degree can further increase, and then improve strut to the booster action of bolt body breakout capacity, so that bolt body is more steady
Fixed supporting foundation pit.
Further, the strut is the hollow structure of one end perforation, and the strut is penetrated through away from the end of insertion end, institute
It states strut side wall and offers the first slurry hole.
By using above-mentioned technical proposal, into bolt body after grout injection, a part of cement slurry is along on strut
The first slurry hole flow into the soil layer near strut, after cement slurry sets, make the soil layer adhesion near strut and strut, and then make
Strut is preferably fixed in foundation pit soil layer.
Further, hangnail baffle, hangnail baffle court are provided on the pre- interior strut side wall that interspaces
To insertion extreme direction inclination, the underface of hangnail baffle is arranged in first slurry hole.
By using above-mentioned technical proposal, the setting of hangnail baffle improves the combination of strut and soil layer, while to first
Slurry hole play the role of it is certain block, reduce strut insertion soil layer in when, soil layer to first starch hole extruding ponding, from
And cement slurry is facilitated along the first slurry hole exudation strut.
Further, several second slurries hole is provided on the side wall of the bolt body, described second starches the tapered setting in hole,
The aperture in second slurry hole is gradually increased from the inside to the outside.
By using above-mentioned technical proposal, into bolt body after grout injection, a part of cement slurry is along anchor pole sheet
The second slurry hole on body sidewall flows into the soil layer near bolt body, is fixed on bolt body preferably in foundation pit soil layer.
Further, the side slope of the foundation pit is fixed with steel mesh, the one end of the bolt body far from anchoring wall with
Steel mesh is welded and fixed.
By using above-mentioned technical proposal, further protective action is played to the side slope of foundation pit.
In conclusion the utility model has the following beneficial effects:
1, by the strut in bolt body, increase the contact area of bolt body and foundation pit, keep bolt body better
Supporting is carried out to foundation pit；
2, by the grout injection in bolt body, the gravity of bolt body is increased, makes bolt body is stable to insert
Enter in foundation pit；
3, by the setting of flight, the effect for facilitating bolt body to screw in foundation pit can be played.
Detailed description of the invention
Fig. 1 is in the present embodiment for embodying the schematic diagram of anchor pole positional relationship；
Fig. 2 is in the present embodiment for embodying the schematic diagram of bolt body and anchor pole casing connection relationship；
Fig. 3 is in the present embodiment for embodying the schematic diagram of branching rod structure；
Fig. 4 is in the present embodiment for embodying the diagrammatic cross-section of anchor structure；
Fig. 5 is in Fig. 4 for embodying the portion the A enlarged diagram of installation axle and stroke pore structure.
In figure, 1, foundation pit；2, wall is anchored；3, anchor pole；31, bolt body；311, anchor pole tip；312, flight；313,
Stop collar；314, annular groove；315, mounting hole；316, screw hole；317, the second slurry hole；32, anchor pole casing；4, strut；41, it drives
Inclined-plane；42, installation axle；43, stroke hole；44, insertion end；45, the first slurry hole；46, hangnail baffle；5, drive rod；51, driving point
End；6, it interspaces in advance；7, steel mesh.
Specific embodiment
The utility model is described in further detail below in conjunction with attached drawing.
Wherein identical components are presented with like reference characters.It should be noted that word used in the following description
Language "front", "rear", "left", "right", "up" and "down" refer to the direction in attached drawing, word " bottom surface " and " top surface ", "inner" and
"outside" refers respectively to the direction towards or away from geometric center of specific component.
A kind of composite supporting construction for soft soil foundation pit is equipped in the side slope of foundation pit 1 as shown in Figure 1, including foundation pit 1
Wall 2 is anchored, several anchor poles 3 for supporting foundation pit 1 are equipped in the side slope of foundation pit 1, anchor pole 3 is inserted into one end anchor of 1 side slope of foundation pit
It is fixed on anchoring wall 2.The cement-soil pile of cement production systD of the mixing containing 10%-20% weight in soil can be used in anchoring wall 2.Foundation pit
1 side slope is fixed with steel mesh 7, and 3 ontology of anchor pole is welded and fixed far from one end of anchoring wall 2 with steel mesh 7.
As shown in figure 3, anchor pole 3 includes bolt body 31, bolt body 31 is hollow pipe, one end of 3 length direction of anchor pole
It is welded with anchor pole tip 311, the tapered setting in anchor pole tip 311 is provided with anchoring wall 2(referring to Fig. 1 on 3 tip of anchor pole)
The external screw thread of connection.Outer wall ring of the bolt body 31 close to anchor pole tip 311, which is set, is fixed with flight 312.Bolt body 31
Several the second circumferentially distributed slurry holes 317 are offered on side wall.Pass through the grout injection in bolt body 31, a part of water
Mud flows into neighbouring soil layer by the second slurry hole 317, and bolt body 31 is preferably fixed on foundation pit 1(referring to Fig. 1)
In soil layer.In order to flow out cement slurry out of second slurry hole 317, the second slurry tapered setting in hole 317, the second slurry hole
317 aperture is gradually increased from the inside to the outside.
As shown in figure 4, being plugged with several struts 4 communicated with bolt body 31 on the side wall of bolt body 31, strut 4 is
Hollow pipe closed at one end is provided with several the first circumferentially distributed slurry holes 45 on the side wall of strut 4.It is worn in bolt body 31
There is the drive rod 5 for driving strut 4 to stretch out.By the grout injection in bolt body 31, a part of cement slurry is along
One slurry hole 45 flows into neighbouring soil layer, makes the soil layer adhesion near strut 4 and strut 4, and preferably fixed strut 4 is in foundation pit 1
Position in soil layer；Strut 4 increases bolt body 31 and foundation pit 1(referring to Fig. 1 simultaneously) contact area of soil layer, make bolt body
31 position is more stable, carries out better supporting to 1 soil layer of foundation pit.
As shown in figure 5, the fitting of drive rod 5 is set in bolt body 31, one end that drive rod 5 protrudes into bolt body 31 is set
It is equipped with driving tip 51, drives the tapered setting in tip 51.The mounting hole 315 for 4 grafting of strut is offered in bolt body 31,
One end that strut 4 protrudes into bolt body 31 is provided with the driving inclined-plane 41 being bonded with driving tip 51.Strut 4 deviates from driving inclined-plane
41 one end is provided with the insertion end 44 of cone cell.
As shown in figure 5, strut 4 is connect by installation axle 42 with mounting hole 315, installation axle 42 is axially perpendicular to strut 4
Glide direction, installation axle 42 fixation is threaded through in bolt body 31, offered on strut 4 for installation axle 42 slide stroke hole
43.Screw hole 316(is offered on 3 ontology of anchor pole referring to Fig. 3), installation axle 42 passes through screw hole 316 and is plugged in stroke hole 43, pacifies
The end of dress axis 42 is threadedly coupled with screw hole 316, and installation axle 42 is located in the wall thickness of 3 ontology of anchor pole.Drive rod 5 is inserted into anchor pole
In ontology 31, driving tip 51 is agreed with driving inclined-plane 41, with being further inserted into for drive rod 5, drives the driving of tip 51 branch
Bar 4 is further pierced by bolt body 31 and pierces foundation pit 1(referring to Fig. 1) soil layer, until installation axle 42 and 43 length direction of stroke hole
Side wall contradict.
As shown in figure 5, in order to further increase the combination of strut 4 Yu soil layer, 4 side wall of strut be fixed with it is several fall
Baffle 46 is pierced, hangnail baffle 46 is located at the side that strut 4 is pierced by bolt body 31, and hangnail baffle 46 inclines towards 44 direction of insertion end
Tiltedly, the underface of hangnail baffle 46 is arranged in the first slurry hole 45.To which under the action of drive rod 5, strut 4 further stretch by sliding
Mounting hole 315 out reduce extruding ponding of the soil layer to the first slurry hole 45, side under the bridging effect of hangnail baffle 46
Just cement slurry oozes out strut 4 along the first slurry hole 45.
As shown in Figure 2 and Figure 4, in order to the strut 4 on 31 side wall of bolt body is preferably inserted in foundation pit 1(referring to figure
1) in soil layer, bolt body 31 welds restraining position ring block 313 on one end of flight 312, and stop collar 313 deviates from anchor pole tip
311 side is provided with annular groove 314, and 314 internal screw thread of annular groove is connected with anchor pole casing 32,32 inner wall of anchor pole casing and anchor pole sheet
Be provided between 31 outer wall of body it is pre- interspace 6, one end of strut 4 is located in bolt body 31, and the other end stretches out bolt body 31
And be located at and interspace in 6 in advance, hangnail baffle 46, which is located at, to interspace in advance in 6.The outer diameter of anchor pole casing 32 is less than the outer of flight 312
Diameter.After anchor pole 3 screws in the soil layer of foundation pit 1, by rotating anchor pole casing 32, anchor pole casing 32 is skidded off out of annular groove 314, along
The length direction of bolt body 31 is skidded off from the soil layer of foundation pit 1, contacts strut 4 and the soil layer of foundation pit 1, is facilitated strut 4
It is inserted into the soil layer of foundation pit 1.
Specific implementation process: anchor pole 3 is screwed between anchoring wall 2 and foundation pit 1, is rotated anchor pole casing 32, is made anchor sleeve
Pipe 32 skids off foundation pit 1 out of annular groove 314, the grout injection into bolt body 31, and cement slurry passes through the first slurry hole 45 and the
Two slurry holes 317 flow into the soil layer of foundation pit 1, make bolt body 31 and strut 4 and neighbouring soil layer adhesion, keep bolt body 31 more preferable
To foundation pit 1 carry out supporting.
This specific embodiment is only the explanation to the utility model, is not limitations of the present invention, ability
Field technique personnel can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but
As long as all by the protection of Patent Law in the scope of the claims of the utility model.
Claims (10)
1. a kind of composite supporting construction for soft soil foundation pit, including foundation pit (1), the anchoring wall being set in foundation pit (1) side slope
(2), several anchor poles (3) are equipped in the foundation pit (1), one end that anchor pole (3) oblique cutting enters foundation pit (1) side slope is anchored in anchoring
On wall (2)；
It is characterized by: the anchor pole (3) includes bolt body (31) and the anchor pole that is detachably connected on bolt body (31)
Casing (32), the bolt body (31) are hollow pipe, and the side wall of the bolt body (31) is equipped with several circumferentially distributed
And it is located at the strut (4) in anchor pole casing (32), the drive for driving strut (4) to stretch out is equipped in the bolt body (31)
Lever (5).
2. the composite supporting construction according to claim 1 for soft soil foundation pit, it is characterised in that: the bolt body
(31) it is fixedly connected with anchor pole tip (311) on one end far from foundation pit (1) side slope, the anchor pole tip (311) is tapered to be set
It sets, outer wall ring of the bolt body (31) close to anchor pole tip (311), which is set, is fixed with flight (312).
3. the composite supporting construction according to claim 2 for soft soil foundation pit, it is characterised in that: the bolt body
(31) it is fixed with stop collar (313) on one end side wall of flight (312), the stop collar (313) is located at flight
(312) far from the side of anchor pole tip (311)；
The stop collar (313) is provided with annular groove (314) away from the side of anchor pole tip (311), anchor pole casing (32) spiral shell
Line is connected to annular groove (314).
4. the composite supporting construction according to claim 1 for soft soil foundation pit, it is characterised in that: the drive rod (5)
Fitting is set in bolt body (31), and one end that the drive rod (5) protrudes into bolt body (31) is provided with driving tip
(51), the tapered setting of the driving tip (51)；
The mounting hole (315) for strut (4) grafting is offered on the bolt body (31), the strut (4) protrudes into anchor pole sheet
One end of body (31) is provided with the driving inclined-plane (41) being bonded with driving tip (51)；
The strut (4) is connect by installation axle (42) with mounting hole (315), and the installation axle (42) is axially perpendicular to strut
(4) glide direction, the installation axle (42) are fixed on bolt body (31), offer on the strut (4) for installation axle
(42) the stroke hole (43) slid.
5. the composite supporting construction according to claim 4 for soft soil foundation pit, it is characterised in that: the bolt body
(31) it is offered on screw hole (316), the installation axle (42) passes through screw hole (316) and is plugged in stroke hole (43), the peace
The end of dress axis (42) is threadedly coupled with screw hole (316), and the installation axle (42) is located in the wall thickness of bolt body (31).
6. the composite supporting construction according to claim 3 for soft soil foundation pit, it is characterised in that: the anchor pole casing
(32) be provided between inner wall and bolt body (31) outer wall it is pre- interspace (6), the outer diameter of the anchor pole casing (32) is less than spiral shell
The outer diameter of blade (312)；
The strut (4) is provided with the insertion end (44) of cone cell away from the one end of driving inclined-plane (41).
7. the composite supporting construction according to claim 6 for soft soil foundation pit, it is characterised in that: the strut (4) is
The hollow structure of one end perforation, the strut (4) penetrate through away from the end of insertion end (44), and strut (4) side wall offers
First slurry hole (45).
8. the composite supporting construction according to claim 7 for soft soil foundation pit, it is characterised in that: pre- leave a blank positioned at described
It is provided with hangnail baffle (46) on strut (4) side wall in gap (6), the hangnail baffle (46) is inclined towards insertion end (44) direction
Tiltedly, underface of the first slurry hole (45) setting in hangnail baffle (46).
9. according to claim 1 to the composite supporting construction for being used for soft soil foundation pit described in 8 any one, it is characterised in that: institute
It states and is provided with several second slurries hole (317) on the side wall of bolt body (31), described second slurry hole (317) tapered setting is described
The aperture of second slurry hole (317) is gradually increased from the inside to the outside.
10. the composite supporting construction according to claim 9 for soft soil foundation pit, it is characterised in that: the foundation pit (1)
Side slope is fixed with steel mesh (7), and the bolt body (31) is welded and fixed far from one end of anchoring wall (2) with steel mesh (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821192366.3U CN208899492U (en) | 2018-07-25 | 2018-07-25 | Composite supporting construction for soft soil foundation pit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821192366.3U CN208899492U (en) | 2018-07-25 | 2018-07-25 | Composite supporting construction for soft soil foundation pit |
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ID=66568089
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| CN201821192366.3U Active CN208899492U (en) | 2018-07-25 | 2018-07-25 | Composite supporting construction for soft soil foundation pit |
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| CN113216212A (en) * | 2021-05-21 | 2021-08-06 | 温州职业技术学院 | Anchor rod for building foundation pit slope implantation |
| CN113186943A (en) * | 2021-05-31 | 2021-07-30 | 中建四局第三建设有限公司 | Building slot slope reinforced structure that shocks resistance |
| CN113756326A (en) * | 2021-09-12 | 2021-12-07 | 深圳市勘察测绘院(集团)有限公司 | Deep weak soil foundation ditch pit bottom utility tunnel environmental protection formula underground structure supporting device |
| CN113756326B (en) * | 2021-09-12 | 2022-08-23 | 深圳市勘察测绘院(集团)有限公司 | Deep weak soil foundation ditch pit bottom utility tunnel environmental protection formula underground structure supporting device |
| CN114775594A (en) * | 2022-05-24 | 2022-07-22 | 河南建科城市更新工程技术有限公司 | Anchoring device for foundation pit support |
| CN114775594B (en) * | 2022-05-24 | 2024-02-09 | 河南建科城市更新工程技术有限公司 | Anchor device for foundation pit support |
| CN115434344A (en) * | 2022-10-12 | 2022-12-06 | 中建八局西南建设工程有限公司 | Reinforcing construction device and construction method for collapse or slippage part of foundation pit slope |
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