CN212656235U - Double-row steel pipe pile supporting structure for foundation pit supporting - Google Patents
Double-row steel pipe pile supporting structure for foundation pit supporting Download PDFInfo
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- CN212656235U CN212656235U CN202020804695.XU CN202020804695U CN212656235U CN 212656235 U CN212656235 U CN 212656235U CN 202020804695 U CN202020804695 U CN 202020804695U CN 212656235 U CN212656235 U CN 212656235U
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Abstract
The utility model relates to a double steel-pipe pile supporting construction for excavation supporting has related to excavation supporting's technical field, and it is big to have solved traditional excavation supporting occupation space, and it is poor to strut the effect, the problem of method inefficiency, including the mutual parallel arrangement's of multiunit preceding campshed and back campshed, preceding campshed and back campshed all adopt the steel-pipe pile, and the steel-pipe pile is including squeezing into the downthehole steel pipe body of stake, and steel pipe body bottom coaxial fixation has the back cover steel sheet, all has pour in the inside of steel pipe body and the gap between steel pipe body and the stake hole and builds the body. The utility model discloses pour at inside and the steel pipe body periphery of steel pipe body and form the body of casting, carry out better connection with the peripheral soil layer of steel-pipe pile, finally form front row pile and back row pile, play better bending resistance effect and resistance to plucking effect, effectively solved traditional single row fender pile and stock support difficult to the difficult problem of construction, construction cycle is short, is a safe and reliable, adapts to the construction new construction of current city construction.
Description
Technical Field
The utility model belongs to the technical field of the technique of excavation supporting and specifically relates to a double steel-pipe pile supporting construction for excavation supporting is related to.
Background
Along with the rapid development of urban construction, the tension of urban land promotes the construction to be continuously expanded to the underground space, the development of the urban underground space is accelerated, and the urban foundation pit excavation scale is developed towards a larger and deeper direction. The deep foundation pit often faces the characteristics of large foundation pit depth, large geological difference and tense temporary construction land, so that the difficulty of excavation and supporting of the foundation pit is increased. Particularly, in a busy section of a city, a deep foundation pit is excavated under the conditions that the ground for plane planning is very tight and the surrounding environment is relatively complex, and during foundation pit supporting, not only is the slope stable and the deformation control requirements met, but also the safety of buildings around the foundation pit is ensured, and meanwhile, the requirements on construction period, operation space, cost and the like are considered. The utility model discloses a novel excavation supporting construction has been provided to this to the technique.
In the traditional common construction, such as a single-row steel pipe pile construction method, the single-pile vertical bearing capacity of the steel pipe pile is limited, so that the method is not suitable for foundation pit support with deep excavation depth; a single-row steel pipe pile and prestressed anchor combined construction method is a method for completing foundation pit support by connecting steel pipe piles into a whole by utilizing a crown beam and a waist beam and matching with the prestressed anchor to form a composite stress system to resist the side slope sliding force of a foundation pit, and the method has large occupied space and is not suitable for arrangement in the foundation pit; the method for filling the pile by drilling the concrete has low efficiency, high cost and large field required by construction.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, one of the purposes of the utility model is to provide a double steel-pipe pile supporting construction for excavation supporting that becomes stake fast, stable in structure, occupy that the space is little, the suitability is strong, practice thrift the cost.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
the utility model provides a double steel-pipe pile supporting construction for excavation supporting, includes the mutual parallel arrangement's of multiunit preceding campshed and back campshed, preceding campshed all adopts the steel-pipe pile with the back campshed, the steel-pipe pile is including the downthehole steel pipe body of driving into pile, the coaxial back cover steel sheet that is fixed with in steel pipe body bottom, the inside of steel pipe body and the steel pipe body with all pour the body of building in the gap between the stake hole.
By adopting the technical scheme, in the construction process, the steel pipe body is vibrated and driven into the side wall of the foundation pit through the vibrating hammer, the bearing capacity of a single pile and the overall stability of the steel pipe pile and the surrounding soil layer can be quickly and effectively improved, the pouring body is poured inside the steel pipe body and at the periphery of the steel pipe body and is well connected with the surrounding soil layer of the steel pipe pile, the front row pile and the rear row pile are finally formed, the front row pile is utilized to form a stable supporting connection structure inside the side wall of the foundation pit, a good bending resistance effect is achieved, and a good pulling resistance effect is formed in the surrounding soil body of the foundation pit by utilizing the rear row pile The construction method is a novel construction structure which is safe, reliable and suitable for current city construction, and has the advantages of economy, applicability and high efficiency.
The present invention may be further configured in a preferred embodiment as: grouting holes are formed in the periphery of the steel pipe body and the bottom sealing steel plate.
Through adopting above-mentioned technical scheme, when utilizing the slip casting hole to be convenient for pour into cement paste into in the steel pipe body, cement paste infiltrates peripheral soil layer, can improve the foundation bearing capacity fast effectively, and then improves the effect of pile foundation bearing capacity, the holistic structural strength of guarantee steel-pipe pile.
The present invention may be further configured in a preferred embodiment as: the pouring body is formed by mixing broken stones and cement paste.
Through adopting above-mentioned technical scheme, utilize rubble and grout to constitute jointly and pour the body and pour to steel pipe body inside, simple structure is stable, the construction of being convenient for.
The present invention may be further configured in a preferred embodiment as: the casting body is made of crushed stones with the particle size of 5-10 mm.
Through adopting above-mentioned technical scheme, 5~10 mm's rubble can reduce the card in the inside condition of steel pipe body, and the effect of the mixed connection with grout is better simultaneously.
The present invention may be further configured in a preferred embodiment as: one side of the front row of piles close to the interior of the foundation pit is fixedly connected with a hanging net.
By adopting the technical scheme, the front row of piles are protected by utilizing the hanging net.
The present invention may be further configured in a preferred embodiment as: and a concrete protective layer is sprayed on one side of the hanging net far away from the front row of piles.
Through adopting above-mentioned technical scheme, the concrete protective layer strengthens the joint strength of hanging net and front row's stake, has protected front row's stake simultaneously better, reduces the wearing and tearing of front row's stake for foundation ditch supporting construction overall stability is higher.
The present invention may be further configured in a preferred embodiment as: the top ends of the adjacent steel pipe piles are fixedly connected with crown beams, and gusset plates are fixedly connected between the adjacent crown beams.
By adopting the technical scheme, the integral stress of the steel pipe pile is enhanced by utilizing the crown beam and the gusset plate, and the vertical shear resistance of the steel pipe pile is enhanced.
The present invention may be further configured in a preferred embodiment as: the crown beam is made of I-shaped steel.
By adopting the technical scheme, the I-shaped steel has high structural strength, strong vertical shear resistance and convenient material taking.
To sum up, the utility model discloses a following at least one kind benefits technological effect:
1. grouting is carried out by arranging grouting holes on the steel pipe body and the bottom sealing steel plate, and cement paste is uniformly injected into a soil layer around the pile body through the pile body grout outlet holes, so that the bearing capacity of a single pile and the integral stability of the steel pipe pile body and the surrounding soil layer can be quickly and effectively improved;
2. the supporting structure is formed by the front row of piles and the rear row of piles on the side wall of the foundation pit, the problem that the occupied space is large when single-row steel pipe pile and anchor rod combined construction is adopted is solved, and the construction process is simple, high in speed, low in cost, strong in overall stability and small in influence on the surrounding environment.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
fig. 2 is a top view of the present invention;
FIG. 3 is a schematic view of the connection structure of the steel pipe body, the connecting crown beam and the gusset plate according to the present invention;
fig. 4 is a schematic structural diagram of the middle steel tube body of the present invention.
Reference numerals: 1. front row piles; 2. back row piles; 3. steel pipe piles; 4. a steel pipe body; 5. a bottom sealing steel plate; 6. pouring a building body; 7. grouting holes; 8. hanging a net; 9. a concrete protective layer; 10. a crown beam; 11. a batten plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, for the utility model discloses a double steel-pipe pile supporting construction for excavation supporting, including the mutual parallel arrangement's of multiunit front row pile 1 and back row pile 2, front row pile 1 is in the foundation ditch lateral wall, and back row pile 2 is inside the foundation ditch lateral wall. The front row of piles 1 are utilized to play a role in bending resistance on the soil body around the foundation pit, and the rear row of piles 2 play a role in pulling resistance on the soil body around the foundation pit.
The casting body 6 adopts crushed stones with the particle size of 5-10 mm. The 5~10mm rubble can reduce the card in the inside condition of steel pipe body 4, and the effect of the mixed connection with grout is better simultaneously.
One side fixedly connected with hanging net 8 that preceding row pile 1 is close to the inside of foundation ditch, one side spraying that hanging net 8 kept away from preceding row pile 1 has concrete protection layer 9. Utilize the string net 8 to protect front row pile 1, concrete protective layer 9 strengthens the joint strength of string net 8 and front row pile 1, has protected front row pile 1 simultaneously better, reduces the wearing and tearing of front row pile 1 for foundation ditch supporting structure overall stability is higher.
The top ends of the adjacent steel pipe piles 3 are fixedly connected with crown beams 10, 22# B-shaped I-shaped steel is adopted by the crown beams 10, gusset plates 11 are fixedly connected between the adjacent crown beams 10, and the crown beams 10 and the gusset plates 11 are both arranged in a manner of extending along the radial direction of the steel pipe piles 3 and are perpendicular to each other. The integral stress of the steel pipe pile 3 is strengthened by the crown beam 10 and the gusset plate 11, and the vertical shear resistance of the steel pipe pile 3 is strengthened.
The implementation principle of the embodiment is as follows:
before construction, grouting holes 7 are formed in the steel pipe body 4 and the bottom sealing steel plate 5, the steel pipe body 4 is driven into the side wall of a foundation pit through a vibration hammer, grouting is carried out in the steel pipe body 4 through a grouting machine and a grouting pipe, broken stones are thrown in, cement enters the pile holes through the grouting holes 7 to be connected with surrounding soil bodies in the grouting process, the steel pipe body 4 is vibrated continuously through the vibration hammer, gaps in the steel pipe body 4 are completely filled with the cement paste, the settlement condition of the cement paste is observed within one hour after primary grouting, secondary grouting is carried out, front row piles 1 and rear row piles 2 are formed, the top of the steel pipe pile 3 is fixedly connected through supporting crown beams 10 and supporting plates 11, a hanging net 8 is arranged on one side, facing the foundation pit, of the rear row pile 2, and a concrete protective layer 9 is sprayed, and construction of foundation pit supporting is achieved. The utility model discloses a structure passes through the grout and the rubble is connected with the peripheral soil body, effectively strengthens the holistic stability of steel-pipe pile 3, the difficult problem that traditional single-row fender pile and stock support are difficult to the construction has effectively been solved, and foundation ditch support intensity has effectively been guaranteed, construction cycle is short, it is fast to become the stake, the safety risk of traditional drilling bored concrete pile pore-forming has been reduced, ensure the security of construction, economic nature, suitability and high efficiency, be a safe and reliable, adapt to the construction new construction of current city construction.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides a double steel-pipe pile supporting construction for excavation supporting, includes preceding campshed (1) and back campshed (2) of the mutual parallel arrangement of multiunit, its characterized in that: the front row pile (1) and the rear row pile (2) are all steel pipe piles (3), each steel pipe pile (3) comprises a steel pipe body (4) driven into a pile hole, a bottom sealing steel plate (5) is coaxially fixed at the bottom of each steel pipe body (4), and pouring bodies (6) are poured in the steel pipe bodies (4) and gaps between the steel pipe bodies (4) and the pile holes.
2. The double-row steel pipe pile supporting structure for foundation pit supporting according to claim 1, wherein grouting holes (7) are formed in the periphery of the steel pipe body (4) and the bottom-sealed steel plate (5).
3. The double row steel pipe pile supporting structure for foundation pit support according to claim 1, wherein the casting body (6) is formed by mixing crushed stone and cement paste.
4. The double-row steel pipe pile supporting structure for foundation pit supporting according to claim 3, wherein the casting body (6) adopts crushed stones with the particle size of 5-10 mm.
5. The double-row steel pipe pile supporting structure for foundation pit supporting according to claim 1, wherein one side of the front row of piles (1) close to the inside of the foundation pit is fixedly connected with a hanging net (8).
6. The double row steel pipe pile supporting structure for foundation pit support according to claim 5, wherein a concrete protective layer (9) is sprayed on one side of the hanging net (8) far away from the front row pile (1).
7. The double row steel pipe pile supporting structure for foundation pit support according to claim 1, wherein top ends of adjacent steel pipe piles (3) are fixedly connected with crown beams (10), and gusset plates (11) are fixedly connected between adjacent crown beams (10).
8. The double row steel pipe pile supporting structure for foundation pit support according to claim 7, wherein the crown beam (10) is made of I-steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020804695.XU CN212656235U (en) | 2020-05-14 | 2020-05-14 | Double-row steel pipe pile supporting structure for foundation pit supporting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020804695.XU CN212656235U (en) | 2020-05-14 | 2020-05-14 | Double-row steel pipe pile supporting structure for foundation pit supporting |
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| CN212656235U true CN212656235U (en) | 2021-03-05 |
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| CN202020804695.XU Active CN212656235U (en) | 2020-05-14 | 2020-05-14 | Double-row steel pipe pile supporting structure for foundation pit supporting |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114808945A (en) * | 2022-04-28 | 2022-07-29 | 中铁时代建筑设计院有限公司 | Cast-in-place large-diameter tubular pile for foundation pit support and tubular pile construction method |
-
2020
- 2020-05-14 CN CN202020804695.XU patent/CN212656235U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114808945A (en) * | 2022-04-28 | 2022-07-29 | 中铁时代建筑设计院有限公司 | Cast-in-place large-diameter tubular pile for foundation pit support and tubular pile construction method |
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