CN215165636U

CN215165636U - Integrated foundation pit structure stable in stress

Info

Publication number: CN215165636U
Application number: CN202120803326.3U
Authority: CN
Inventors: 吴晓恩
Original assignee: Central South University
Current assignee: Central South University
Priority date: 2021-04-19
Filing date: 2021-04-19
Publication date: 2021-12-14
Anticipated expiration: 2031-04-19

Abstract

The utility model discloses a stable integration foundation ditch structure of atress, the lateral wall of foundation ditch structure are outer cement soil pile, the inlayer of outer cement soil pile is prefabricated bracket pile, forms compound pile wall, below the foundation ditch bottom surface is inserted to the bottom of compound pile wall, and the hole bottom department of foundation ditch structure is equipped with the bottom plate, the bottom plate has the compound stake of strength nature that inserts underground, strength nature compound stake with connect through supporting the cement soil pile group between the prefabricated bracket pile, the inboard direct laminating of compound pile wall is fixed with basement lateral wall, the bottom of basement lateral wall sit in on the bottom plate, the direct butt in side of bottom plate is in on the prefabricated bracket pile of compound pile wall inlayer. This scheme is with the lateral wall direct contact of compound pile wall and building, directly transmits vertical bearing capacity, the withdrawal resistance that the compound pile wall provided to the bottom plate and the lateral wall of basement on, the improvement of directness the holistic atress effect of foundation ditch, improved the stability of building on the cost basis that has reduced simultaneously.

Description

Integrated foundation pit structure stable in stress

Technical Field

The utility model belongs to the technical field of basic building, have and relate to a stable integration foundation ditch structure of atress.

Background

At present, with more and more high-rise buildings and larger foundation pits, most of excavated underground spaces are used as garages, warehouses, markets, civil air defense projects and the like. After the foundation pit of a building is excavated, a supporting structure is required to be arranged on the periphery of the foundation pit to prevent partial or large-area collapse, the overall structure of the underground part generally comprises a foundation of the building, a foundation pit supporting part and a basement main structure part, most of the existing construction modes are respectively and independently designed and constructed, and the existing construction modes rarely have integrally designed and constructed foundation pit structures.

In the prior art, reference is made to chinese patent No. CN107975043B, which discloses an integrated structure of a foundation pit supporting structure, an underground structure and a foundation, and the patent is to transmit the bearing capacity and the uplift resistance (anti-floating effect) provided by a precast corbel pile 1 to a building structure bottom plate and an outer wall through a reinforced concrete slab 5. The bearing capacity and the uplift resistance are very large, generally, a single pile at least reaches hundreds to thousands of kilonewtons, while the reinforced concrete plate 5 is only equivalent to a cantilever plate horizontally extending outwards from a bottom plate or a floor slab of a building, the bending moment is very large under the condition of stress, and the defect that the vertical force is very large only transmitted through the horizontal reinforced concrete plate 5 is overcome; therefore, the reinforced concrete slab 5 as a force transmission structure between the prefabricated corbel pile 1 and the building structure cannot bear or transmit a large vertical bearing force or a large pulling resistance force, so that the stress problem of the reinforced concrete slab is not considered in the design of the invention, and therefore, improvement on the related problems existing in the prior art is urgently needed.

SUMMERY OF THE UTILITY MODEL

The utility model discloses lie in solving the not enough that exists among the prior art, provide an integration foundation ditch structure that can bear great bearing capacity, withdrawal resistance between building and the compound pile wall.

The utility model discloses a stable integration foundation ditch structure of atress, the lateral wall of foundation ditch structure are outer cement soil pile, the inlayer of outer cement soil pile is prefabricated bracket pile, forms compound pile wall, below the foundation ditch bottom surface is inserted to the bottom of compound pile wall, and the hole bottom department of foundation ditch structure is equipped with the bottom plate, the bottom plate has the compound stake of strength nature of inserting underground, strength nature compound pile with connect through supporting the cement soil pile group between the prefabricated bracket pile, the inboard direct laminating of compound pile wall is fixed with basement lateral wall, basement lateral wall's bottom is located on the bottom plate, the side direct butt of bottom plate is in on the prefabricated bracket pile of compound pile wall inlayer.

Further, correspond on the inboard prefabricated bracket stake the position of the top, the middle part and the bottom of basement lateral wall all is equipped with and is used for supporting the bracket of basement lateral wall, the bracket passes outer cement soil stake is outside to extend.

Further, the bracket of bottom includes first support bracket and reverse bracket, the bracket at middle part, top supports the bracket for the second, first support bracket and reverse bracket all imbed in the basement lateral wall, the bottom plate is fixed between first support bracket and the reverse bracket.

Still further, the second supports the bracket and is the rectangle bracket structure, reverse bracket and first support bracket are one side contact surface slope opposite side and are planar single slope formula bracket structure, the plane of reverse bracket and first support bracket with the bottom plate is laminated mutually.

Preferably, the thickness of basement lateral wall is greater than the embedding degree of depth of bracket, first support bracket of bottom plate below with the rigidity composite pile is the same height.

Still further, the supporting soil cement pile group is connected by a plurality of continuously overlapped soil cement piles, and the supporting soil cement pile group is positioned under the side wall of the underground chamber.

Preferably, a floor slab parallel to the bottom plate is further fixed on the side wall of the basement, and the floor slab can be provided with multiple layers.

The utility model discloses it is not enough to the obvious that exists among the prior art to make the improvement on its basis, its beneficial effect lies in:

1. the problem that in the prior art, a reinforced concrete plate serving as a force transmission structure between a composite pile wall and a building structure cannot bear or transmit large vertical bearing force or uplift force is solved; this scheme is with the lateral wall direct contact of compound pile wall and building, directly transmits vertical bearing capacity, the withdrawal resistance that the compound pile wall provided to the bottom plate and the lateral wall of basement on, the improvement of directness the holistic atress effect of foundation ditch.

2. The composite pile wall is directly attached to the side edge of the basement building, micro-expansive cement soil does not need to be backfilled between the side wall of the basement and the composite pile wall, and because the distance between the composite pile wall and the basement structure is reduced, the continuous lapped supporting cement soil pile group below can be reduced, the cost is reduced, and the stability of the building is improved.

3. In the scheme in the prior art, a method for reserving a hole on a reinforced concrete slab to carry out micro-expansion cemented soil backfilling fertilizer grooves cannot be used for tamping backfilled cemented soil, the cemented soil is in a free accumulation state after being poured from the hole, although the micro-expansion property exists, the effect cannot be evaluated, and the requirement of building design on the compactness of backfilled earthwork cannot be met; and this scheme is direct pours basement outer wall concrete in the composite pile wall outside, this problem of solution that can be fine.

Drawings

Fig. 1 is the utility model discloses a whole schematic diagram of foundation ditch structure.

Description of the drawings: 1. the composite pile wall comprises 11 prefabricated bracket piles, 12 outer cement-soil piles, 2 underground chamber side walls, 3 bottom plates, 4 stiff composite piles, 5 supporting cement-soil pile groups, 111 first supporting brackets, 112 reverse brackets, 113 second supporting brackets, 31 and a floor slab.

Detailed Description

The following provides a further detailed description of the integrated foundation pit structure with stable stress according to the present invention with reference to the accompanying drawings and the following embodiments.

Examples

Referring to fig. 1, the foundation ditch structure includes outer cement soil pile 12 of side, the inlayer of outer cement soil pile is prefabricated bracket stake 11, forms composite pile wall 1, below the foundation ditch bottom surface is inserted to composite pile wall 1's bottom, the hole bottom department of foundation ditch structure is equipped with bottom plate 3, bottom plate 3 is the bottom surface of foundation ditch, bottom plate 3 has the compound stake 4 of strength nature of inserting underground, strength nature compound stake 4 with connect through supporting cement soil pile group 5 between the prefabricated bracket stake 11, the inboard direct laminating of composite pile wall 1 is fixed with basement lateral wall 2, the bottom of basement lateral wall 2 is located on bottom plate 3, the direct butt in side of bottom plate 3 is in on the prefabricated bracket stake 11 of composite pile wall 1 inlayer.

Correspond on the prefabricated bracket pile 11 the position of the top of basement lateral wall 2, middle part and bottom is equipped with respectively and is used for supporting the bracket of basement lateral wall 2, the bracket passes outer cement soil pile 12 outwards extends. The bracket of bottom position includes first support bracket 111 and reverse bracket 112, the bracket at middle part, top is the second support bracket 113, first support bracket 111 and reverse bracket 112 all imbed in the basement lateral wall 2, bottom plate 3 is fixed between first support bracket 111 and the reverse bracket 112. The second supports bracket 113 and is the rectangle bracket structure, reverse bracket 112 and first support bracket 111 are planar single slope formula bracket structure for one side contact surface slope opposite side, reverse bracket 112 and first support bracket 111's plane one side with the bottom plate is laminated mutually, first support bracket 111 with high, make the bottom surface of foundation ditch keep the level with stiff composite pile 4 height.

Simultaneously in order to guarantee the atress stable effect of basement lateral wall 2, increase its thickness properly, make the thickness of basement lateral wall 2 at least be greater than the embedding degree of depth of bracket to satisfy the supporting role of bracket, and make the structure of basement in the foundation ditch more stable.

The embodiment improves the problems existing in the prior art; in the embodiment, the composite pile wall is directly contacted with the side wall of the building, and the vertical bearing capacity and the uplift resistance provided by the composite pile wall are directly transmitted to the bottom plate and the side wall of the basement, so that the integral stress effect of the foundation pit is directly improved, and the practicability is higher; and directly laminate the compound pile wall and set up at basement building side, need not to backfill the little expansive soil cement between basement lateral wall and compound pile wall to because compound pile wall and basement structure distance reduce, can reduce the continuous lapped support soil cement pile group of below equally, with the appropriate thickening of thickness of basement outer wall in order to guarantee that it is more stable, improved the stability of building when having reduced the cost.

The above-mentioned embodiments are merely descriptions of the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention, and all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention, and all the modifications and improvements made by those skilled in the art to the technical solution of the present invention without departing from the concept of the present invention shall fall within the protection scope defined by the claims of the present invention.

Claims

1. The utility model provides a stable integration foundation ditch structure of atress, the lateral wall of foundation ditch structure is outer cement soil pile (12), the inlayer of outer cement soil pile is prefabricated bracket stake (11), forms composite pile wall (1), below the foundation ditch bottom surface is inserted to the bottom of composite pile wall (1), and the pit bottom department of foundation ditch structure is equipped with bottom plate (3), bottom plate (3) have and insert underground strength nature composite pile (4), strength nature composite pile (4) with connect its characterized in that through supporting cement soil pile group (5) between prefabricated bracket stake (11): the inboard direct laminating of composite pile wall (1) is fixed with basement lateral wall (2), the bottom of basement lateral wall (2) is located on bottom plate (3), the direct butt in of side of bottom plate (3) is in on prefabricated bracket stake (11) of composite pile wall (1) inlayer.

2. The integrated foundation pit structure of claim 1, wherein: correspond on prefabricated bracket stake (11) the position of the top, the middle part and the bottom of basement lateral wall (2) is equipped with respectively and is used for supporting the bracket of basement lateral wall (2), the bracket passes outer cement soil pile (12) are outside to be extended.

3. The integrated foundation pit structure of claim 2, wherein: the bracket of bottom position includes first support bracket (111) and reverse bracket (112), the bracket at middle part, top is second support bracket (113), first support bracket (111) and reverse bracket (112) all imbed in basement lateral wall (2), bottom plate (3) are fixed between first support bracket (111) and reverse bracket (112).

4. The integrated foundation pit structure of claim 3, wherein: the second supports bracket (113) and is the rectangle bracket structure, reverse bracket (112) and first support bracket (111) are planar single slope formula bracket structure for one side contact surface slope opposite side, the plane one side of reverse bracket (112) and first support bracket (111) with the bottom plate laminates mutually.

5. The integrated foundation pit structure of claim 3, wherein: the thickness of basement lateral wall (2) is greater than the embedding degree of depth of bracket, first support bracket (111) with strength nature composite pile (4) are the same height.

6. The integrated foundation pit structure of claim 1, wherein: the supporting soil cement pile group (5) is formed by connecting a plurality of continuously overlapped soil cement piles, and the supporting soil cement pile group (5) is located under the side wall (2) of the underground chamber.

7. The integrated foundation pit structure of claim 1, wherein: and a floor (31) parallel to the bottom plate (3) is further fixed on the side wall (2) of the underground chamber.