CN216006980U - Steel-pipe pile composite wall foundation pit structure - Google Patents
Steel-pipe pile composite wall foundation pit structure Download PDFInfo
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- CN216006980U CN216006980U CN202122600440.9U CN202122600440U CN216006980U CN 216006980 U CN216006980 U CN 216006980U CN 202122600440 U CN202122600440 U CN 202122600440U CN 216006980 U CN216006980 U CN 216006980U
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- pipe pile
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- anchor cable
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Abstract
The utility model provides a steel pipe pile composite wall foundation pit structure, which comprises a foundation pit, a steel pipe pile, an anchor cable structure and a reinforcing mesh; the steel pipe piles are vertically arranged along the edge of the foundation pit at intervals; the reinforcing mesh is laid on the slope protection surface of the foundation pit; the front end of the anchor cable structure is inserted into a soil body outside the slope protection, and the tail end of the anchor cable structure is fixedly connected with the steel pipe pile and/or the reinforcing mesh. The utility model discloses place the anchor rope structure body and the soil combined action of certain length and distribution density in the soil body, compensate not enough of soil body self intensity. Not only effectively improving the integral rigidity of the soil body, but also making up the weak points of low tensile strength and shear strength of the soil body. The potential of the structural strength of the soil body is fully exerted through interaction, the deformation and damage properties of the side slope are changed, and the overall stability is obviously improved.
Description
Technical Field
The utility model belongs to the technical field of civil engineering technique and specifically relates to a steel-pipe pile composite wall foundation pit structure is related to.
Background
At present, a scheme of reinforced concrete piles and prestressed anchor cables is adopted for slope protection structures for building foundation pits, and although the scheme is reliable in safety, the engineering cost is increased, especially the pile forming difficulty of weathered rock stratums is high, if a percussion drilling machine is adopted, the efficiency is low, the noise is high, the construction feasibility in residential areas is not high, a high-power rotary drilling machine is adopted for forming piles, the cost is high, and the hole forming noise in rock stratums is high.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a steel-pipe pile composite wall foundation ditch structure to solve at least one above-mentioned technical problem who exists among the prior art. The scheme of the application has the advantages of safety, reliability, strong implementability, low manufacturing cost and the like.
In order to solve the technical problem, the utility model provides a pair of steel-pipe pile composite wall foundation pit structure, include: the foundation pit, the steel pipe pile, the anchor cable structure and the reinforcing mesh;
the steel pipe piles are vertically arranged along the edge of the foundation pit at intervals;
the reinforcing mesh is laid on the slope protection surface of the foundation pit;
the front end of the anchor cable structure is inserted into soil outside the protection slope (the protection slope in the application comprises a wall body and the protection slope in a narrow sense), and the tail end of the anchor cable structure is fixedly connected with the steel pipe pile and/or the reinforcing mesh.
Further, the anchor cable structure comprises an anchor cable, wherein the anchor cable comprises an anchoring section and a free section; concrete is poured around the anchoring section to form a rod-shaped reinforced concrete anchor rod structure; the tail end of the free section is fixedly connected with the steel pipe pile and/or the reinforcing mesh.
During construction, a hole is drilled in a soil body to form an anchor hole, after the anchor cable is inserted into the anchor hole, concrete is injected into the front section of the anchor hole, and the anchor section of the anchor cable is wrapped to form an anchor rod structure in a reinforced concrete form.
And the tail end of the free section is fixedly connected with the steel pipe pile and/or the steel bar mesh through the anchor head and the backing plate.
Furthermore, the anchor cable structure is obliquely inserted into the soil body from top to bottom.
And the tail end of the anchor cable structure abuts against the steel pipe pile and/or the steel bar net through the wedge-shaped cushion block.
Furthermore, a plurality of anchor cable structures are arranged at intervals in the same horizontal plane; the anchor cable structure is characterized by further comprising rigid connecting pieces, wherein the same rigid connecting piece is horizontally and transversely arranged and abutted against a plurality of steel pipe piles, and the tail end of the anchor cable structure is fixedly connected with the rigid connecting pieces.
Further, the rigid connecting piece comprises I-steel, channel steel or other forms of rigid connecting rods, connecting beams and the like.
Furthermore, the anchor cable comprises a plurality of steel strands, a tightening ring is arranged along the length direction of the anchor cable, and the tightening ring is sleeved outside the plurality of steel strands.
Furthermore, the cable fixing device also comprises a plurality of wire erecting rings arranged at intervals along the length direction of the anchor cable, each wire erecting ring comprises a disc-shaped body, a plurality of clamping grooves are uniformly arranged on the outer circumference of the disc-shaped body at intervals, and a plurality of steel strands are respectively clamped in the different clamping grooves.
And furthermore, the foundation pit supporting structure further comprises supporting piles in a reinforced concrete form, the outer diameter of each supporting pile is larger than that of each steel pipe pile, and the supporting piles and the steel pipe piles are alternately arranged along the foundation pit.
And further, the soil nails comprise ribbed steel bars, the ribbed steel bars are inserted into the soil body drilled holes and are injected with concrete slurry, and the tail ends of the ribbed steel bars are fixedly connected with the steel pipe piles and/or the steel bar mesh.
Adopt above-mentioned technical scheme, the utility model discloses following beneficial effect has:
the utility model provides a pair of steel-pipe pile composite wall foundation pit structure places the anchor rope structure body and the soil combined action of certain length and distribution density in the soil body, compensaties the not enough of soil body self intensity. Not only effectively improving the integral rigidity of the soil body, but also making up the weak points of low tensile strength and shear strength of the soil body. Through interaction and the potential of the structural strength of the soil body, the deformation and damage properties of the side slope are fully exerted, the overall stability is obviously improved, more importantly, sudden collapse such as plain soil side slope can not occur in the loading process of the anchor cable structural wall, the anchor cable structural wall not only delays the development stage of plastic deformation, but also has obvious progressive deformation and cracking damage, and the integral collapse can not occur.
Specifically, the anchor cable structure has the following functions in the composite soil body:
(1) the anchor cable structure plays a role of hooping and binding a skeleton on the composite soil body, restricts the deformation of the soil body and enables the composite soil body to form a whole.
(2) The anchor cable structure and the soil body bear the external load and the self-weight stress of the soil body together, the anchor cable structure plays a role in sharing, and after the soil body enters a plastic state, the stress is gradually transferred to the anchor cable structure, and the sharing effect of the anchor cable structure is more prominent.
(3) The anchor cable structure plays a role in stress transfer and diffusion to delay the formation and development of a crack area.
(4) The slope surface deformation restraining function is that a reinforcing mesh spraying concrete panel which is arranged on the slope surface and is combined with the anchor cable structure limits slope surface excavation unloading and expansion deformation, and the boundary restraining function is strengthened.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments or the description in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a foundation pit structure of a steel pipe pile composite wall provided by an embodiment of the present invention;
fig. 2 is a schematic diagram illustrating the arrangement of steel pipe piles, anchor cable structures and reinforcing mesh in the embodiment of the present invention;
FIG. 3 is an enlarged view of a portion of FIG. 1 at A;
FIG. 4 is a schematic view of a connection structure of an anchor cable structure at a concrete surface layer in the embodiment;
FIG. 5 is a schematic cross-sectional view of the anchoring section at the tightening collar in this embodiment;
FIG. 6 is a schematic structural view of the anchoring section at the stringing ring in this embodiment;
reference numerals:
10-steel pipe pile; 80-anchor cable construction; 80 a-steel strand; 81-free section; 82-an anchor segment; 83-concrete; 84-an anchor head; 85-flat base plate; 86-rigid connection; 87-wedge shaped spacer blocks; 88-stringing ring; 89-tightening the hoop; 70-reinforcing mesh; 71-concrete surface course; 90-foundation pit; 91-soil body.
Detailed Description
The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
The present invention will be further explained with reference to specific embodiments.
As shown in fig. 1-2, the present embodiment provides a steel pipe pile composite wall foundation pit structure, including: a foundation pit 90, a steel pipe pile 10, an anchor cable structure 80 and a reinforcing mesh 70;
a plurality of steel pipe piles 10 are vertically arranged at intervals along the edge of the foundation pit 90;
the reinforcing mesh 70 is laid on the slope protection surface of the foundation pit 90;
the front end of the anchor cable structure 80 is inserted into the soil body 91 outside the slope protection, and the tail end of the anchor cable structure 80 is fixedly connected with the steel pipe pile 10 and/or the reinforcing mesh 70.
After the reinforcing mesh 70 is fully hung and fixed, concrete is sprayed, so that a stable slope protection structure, namely a concrete surface layer 71 is formed outside the slope protection.
In this embodiment, the anchor cable structure 80 is an anchor cable, and the anchor cable includes an anchoring section 82 and a free section 81; concrete is poured around the anchoring section 82 to form a rod-shaped reinforced concrete anchor rod structure; the end of the free section 81 is fixedly connected to the steel pipe pile 10 and/or the mesh reinforcement 70. During construction, a hole is drilled in the soil body 91 to form an anchor hole, after the anchor cable is inserted into the anchor hole, concrete 83 is injected into the front section of the anchor hole, and the concrete 83 wraps the anchoring section 82 of the anchor cable to form an anchor rod structure in a reinforced concrete form. In this embodiment, the anchor cable structure 80 is inserted into the soil body 91 from top to bottom in an inclined manner, and forms an included angle of 15 degrees with the horizontal plane.
Referring to fig. 3, the free segment 81 is connected with an anchor head 84, and the end of the free segment 81 is fixedly connected with the steel-pipe pile 10 or the mesh reinforcement 70 through the anchor head 84 and a flat packing 85. Wedge-shaped cushion blocks 87 are arranged between the flat cushion plate 85 and the steel pipe pile 10 or the reinforcing mesh 70, and a plurality of anchor cable structures 80 are arranged at intervals in the same horizontal plane; and also includes a rigid connecting piece 86, the same rigid connecting piece 86 is horizontally and transversely arranged; the end of the free section 81 abuts against the steel pipe pile 10 through the anchor head 84, the flat packing 85, the rigid connecting member 86 and the wedge-shaped packing 87 in sequence. Wherein the rigid connection 86 is two i-beams.
Referring to fig. 4, the end of the free section 81 is abutted against the concrete face layer 71 containing the reinforcing mesh 70 by the anchor head 84, the flat packing 85 and the rigid connector 86 in turn. And the rigid connectors 86 are channel steel.
In this embodiment, the cable bolt includes a plurality of strands 80a, and a tightening ring 89 is provided along the length of the cable bolt, and fig. 5 is a schematic cross-sectional view of the anchoring section 82 at the tightening ring 89 in this embodiment. Referring to fig. 5, the tightening ring 89 is sleeved outside the plurality of steel strands 80 a. And, referring to fig. 6, the anchor cable further comprises a plurality of stringing rings 88 arranged at intervals along the length direction of the anchor cable, wherein each stringing ring 88 comprises a disk-shaped body, a plurality of clamping grooves are uniformly arranged on the outer circumference of the disk-shaped body at intervals, and a plurality of steel strands 80a are respectively clamped in different clamping grooves.
On the basis of the above technical solution, it is more preferable that a support pile in a reinforced concrete form may be further provided, an outer diameter of the support pile is larger than an outer diameter of the steel pipe pile 10, and the support pile and the steel pipe pile 10 are alternately arranged along the foundation pit 90.
In addition, a plurality of soil nails may be included in this embodiment, each soil nail includes a ribbed steel bar, the ribbed steel bar is inserted into the soil body borehole and is poured with concrete grout, as shown in fig. 2 and 3, and the ends of the ribbed steel bar are fixedly connected to the steel pipe pile and/or the steel bar mesh.
The wall body in the application comprises a vertical wall body structure without a slope, and can also comprise a slope protection structure with a certain slope; conversely, the revetment may also include vertically disposed wall structures.
The utility model provides a pair of steel-pipe pile composite wall foundation pit structure places the anchor rope structure 80 body and the soil combined action of certain length and distribution density in soil body 91, compensaties the not enough of soil body 91 self intensity. Not only effectively improving the integral rigidity of the soil body 91, but also making up the weak points of the soil body 91 with low tensile strength and shear strength. Through interaction, the structural strength potential of the soil body 91 is fully exerted, the properties of slope deformation and damage are changed, the overall stability is obviously improved, more importantly, sudden collapse slip like plain soil slope can not occur in the loading process of the anchor cable structure 80 wall, the anchor cable structure 80 wall not only delays the plastic deformation development stage, but also has obvious progressive deformation and cracking damage, and the integral collapse slip can not occur.
Specifically, the anchor cable structure 80 of the present application has the following functions in the composite soil body 91:
(1) the anchor cable structure 80 acts as a hoop and truss for the composite soil body 91, restricting the deformation of the soil body 91 and enabling the composite soil body 91 to form a whole.
(2) The anchor cable structure 80 and the soil body 91 bear the external load and the self-weight stress of the soil body 91 together, the anchor cable structure 80 plays a role in sharing, and the stress is gradually transferred to the anchor cable structure 80 after the soil body 91 enters a plastic state due to the fact that the anchor cable structure 80 has high tensile and shear strength, and the sharing effect of the anchor cable structure 80 is more prominent.
(3) The cable bolt structure 80 acts as a stress transfer and diffusion to delay the formation and development of a fracture zone.
(4) The reinforcing mesh 70 arranged on the slope together with the anchor cable structure 80 limits the slope excavation unloading to expand and deform, and strengthens the boundary constraint effect.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (10)
1. The utility model provides a steel-pipe pile composite wall foundation pit structure which characterized in that includes: the foundation pit, the steel pipe pile, the anchor cable structure and the reinforcing mesh;
the steel pipe piles are vertically arranged along the edge of the foundation pit at intervals;
the reinforcing mesh is laid on the slope protection surface of the foundation pit;
the front end of the anchor cable structure is inserted into a soil body outside the slope protection, and the tail end of the anchor cable structure is fixedly connected with the steel pipe pile and/or the reinforcing mesh.
2. The steel pipe pile composite wall pit structure of claim 1, wherein the anchor cable structure comprises an anchor cable, the anchor cable comprising an anchoring section and a free section; concrete is poured around the anchoring section to form a rod-shaped reinforced concrete anchor rod structure; the tail end of the free section is fixedly connected with the steel pipe pile and/or the reinforcing mesh.
3. The steel pipe pile composite wall pit structure according to claim 2, further comprising an anchor head and a backing plate, wherein the end of the free section is fixedly connected with the steel pipe pile and/or the reinforcing mesh through the anchor head and the backing plate.
4. The steel pipe pile composite wall foundation pit structure of claim 1, wherein the anchor cable structure is inserted into the soil body from top to bottom in an inclined manner.
5. The steel pipe pile composite wall foundation pit structure of claim 4, further comprising wedge-shaped cushion blocks, wherein the tail ends of the anchor cable structures abut against the steel pipe piles and/or the reinforcing mesh through the wedge-shaped cushion blocks.
6. The steel pipe pile composite wall foundation pit structure according to claim 1, wherein a plurality of the anchor cable structures are arranged at intervals in the same horizontal plane; the anchor cable structure is characterized by further comprising rigid connecting pieces, wherein the same rigid connecting piece is horizontally and transversely arranged and abutted against a plurality of steel pipe piles, and the tail end of the anchor cable structure is fixedly connected with the rigid connecting pieces.
7. The steel pipe pile composite wall foundation pit structure of claim 6, wherein the rigid connector is an I-steel or a channel steel.
8. The steel pipe pile composite wall foundation pit structure of claim 2, wherein the anchor rope comprises a plurality of steel strands, and a tightening ring is arranged along the length direction of the anchor rope and sleeved outside the plurality of steel strands.
9. The steel pipe pile composite wall foundation pit structure of claim 8, further comprising a plurality of stringing rings arranged at intervals along the length direction of the anchor cable, wherein the stringing rings comprise a disc-shaped body, a plurality of clamping grooves are uniformly arranged on the outer circumference of the disc-shaped body at intervals, and a plurality of steel strands are respectively clamped in the different clamping grooves.
10. The steel pipe pile composite wall foundation pit structure of claim 8, further comprising support piles in the form of reinforced concrete, the outer diameter of the support piles being larger than the outer diameter of the steel pipe piles, the support piles and the steel pipe piles being alternately arranged along the foundation pit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122600440.9U CN216006980U (en) | 2021-10-27 | 2021-10-27 | Steel-pipe pile composite wall foundation pit structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122600440.9U CN216006980U (en) | 2021-10-27 | 2021-10-27 | Steel-pipe pile composite wall foundation pit structure |
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| Publication Number | Publication Date |
|---|---|
| CN216006980U true CN216006980U (en) | 2022-03-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122600440.9U Active CN216006980U (en) | 2021-10-27 | 2021-10-27 | Steel-pipe pile composite wall foundation pit structure |
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| CN (1) | CN216006980U (en) |
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2021
- 2021-10-27 CN CN202122600440.9U patent/CN216006980U/en active Active
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