CN220580010U

CN220580010U - Miniature pile combined supporting structure

Info

Publication number: CN220580010U
Application number: CN202322182461.2U
Authority: CN
Inventors: 刘辉; 韩卫东
Original assignee: Guangzhou University of Science and Technology
Current assignee: Guangzhou University of Science and Technology
Priority date: 2023-08-15
Filing date: 2023-08-15
Publication date: 2024-03-12
Anticipated expiration: 2033-08-15

Abstract

The utility model belongs to the field of construction, in particular to a miniature pile combined supporting structure, aiming at the existing technical problems, the utility model provides a scheme which comprises a soil layer, a waterproof curtain and a supporting component, wherein a foundation pit is arranged at the top of the soil layer, and the waterproof curtain is fixedly connected with the inner wall of the soil layer; the support assembly consists of a miniature pile, steel flower pipe soil nails and a capping beam, wherein the miniature pile is connected with a waterproof curtain, the capping beam is fixed at the top of the miniature pile, and the steel flower pipe soil nails distributed at equal intervals along the length direction of the miniature pile are arranged on one side of the miniature pile; the utility model has the advantages of good structural integrity, good seepage-proofing effect, high efficiency in pile forming process, no slurry operation, integrated functions of the building envelope and the seepage-proofing effect, no need of additionally assisting structural measures such as filling piles, and the like, and has very obvious advantages of reducing cost, improving work efficiency and comprehensive economic benefit compared with other building envelope forms meeting the same engineering requirements.

Description

Miniature pile combined supporting structure

Technical Field

The utility model relates to the technical field of buildings, in particular to a miniature pile combined supporting structure.

Background

The conventional foundation pit support is formed by filling piles, the construction period is long, the cost is high, synchronous construction is performed near a subway station, the excavation depth of the foundation pit is 6.2 meters, the construction cost is high by filling the piles and adding waterproof curtain, the conventional steel sheet pile support is excessively deformed due to the existence of a deep sand layer at the bottom of a deep foundation pit, an effective support system cannot be formed, and no slope-releasing condition exists on the site.

Disclosure of Invention

The utility model provides a miniature pile combined supporting structure, which solves the problems in the background technology.

In order to achieve the above purpose, the present utility model adopts the following technical scheme:

the miniature pile combined supporting structure comprises a soil layer, a waterproof curtain and a supporting component, wherein the foundation pit is arranged at the top of the soil layer, and the waterproof curtain is fixedly connected with the inner wall of the soil layer;

the support assembly consists of a miniature pile, steel flower pipe soil nails and a capping beam, wherein the miniature pile is connected with a waterproof curtain, the capping beam is fixed at the top of the miniature pile, and the steel flower pipe soil nails distributed at equal intervals along the length direction of the miniature pile are arranged on one side of the miniature pile.

Preferably, the steel flower pipe soil nails are obliquely arranged, and at least two layers of steel flower pipe soil nails are distributed along the length direction of the miniature piles.

According to the utility model, the triaxial stirring pile is used for drilling a soil layer, and the triaxial stirring pile is inserted into the miniature pile in time to form a vertical supporting structure after construction, so that the miniature pile and surrounding soil body form curtain water resistance and the strength stability of the soil body are improved, meanwhile, the steel pipe pressure grouting is performed in a layered mode to form the cement steel pipe soil nail, so that the strength and rigidity of the supporting structure are greatly improved, the miniature pile and the cement steel pipe soil nail form effective constraint to resist the acting force of the soil body after excavation of a foundation pit, the structure is good in integrity, good in seepage-proofing effect, high in pile forming process efficiency, free of slurry operation, and capable of integrating the functions of the supporting structure and the seepage-proofing effect, and structural measures such as a filling pile are not needed, compared with other supporting structure forms which achieve the same engineering requirements, the cost is reduced, the work efficiency is improved, and the comprehensive economic benefit advantage is very obvious.

Drawings

Fig. 1 is a schematic structural view of a combined support structure for micro piles according to the present utility model.

Reference numerals in the drawings: 100. a soil layer; 101. a foundation pit; 300. a support assembly; 301 micro piles; 302. soil nails of the steel flower pipe; 303. and (5) pressing the top beam.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments.

Referring to fig. 1, a combined support structure of micro piles comprises a soil layer 100, a waterproof curtain and a support assembly 300, wherein the foundation pit 101 is arranged at the top of the soil layer 100, and the waterproof curtain is fixedly connected with the inner wall of the soil layer 100;

the support assembly 300 consists of a micro pile 301, steel flower pipe soil nails 302 and a capping beam 303, wherein the micro pile 301 is connected with a waterproof curtain, the capping beam 303 is fixed at the top of the micro pile 301, and 302 distributed at equal intervals along the length direction of the micro pile 301 are arranged on one side of the micro pile 301;

in this embodiment: the steel flower pipe soil nails 302 are obliquely arranged, and at least two layers of steel flower pipe soil nails 302 are distributed along the length direction of the miniature piles 301;

in this embodiment: s1: drilling holes through the triaxial stirring piles, and then spraying cement into the soil layer 100 and fully stirring;

s2: inserting the micro pile 301 in time after the triaxial mixing pile is constructed, and inserting the micro pile 301 into a triaxial mixing pile drilling and cement pouring position;

s3: the micro pile 301 performs earth excavation construction, the bottom of the micro pile 301 passes through the bottom of the foundation pit 101 and is connected with the soil layer 100, a screw hole is formed in the top of the micro pile 301, and the capping beam 303 is fixed to the top of the micro pile 301 through a bolt;

s4: after the concrete strength of the micro pile 301 and the capping beam 303 meets the requirement, excavating the foundation pit 101;

s5: after the foundation pit 101 is excavated to the first layer of steel flower pipe position, steel flower pipe soil nails 302 are formed through steel flower pipe pressure grouting;

s6: after the construction of the first layer of steel flower pipe soil nails 302 is completed and reaches a certain strength, carrying out second layer of earthwork excavation, forming the steel flower pipe soil nails 302 through steel flower pipe pressure grouting after excavating to the second layer of steel flower pipe position, excavating in layers and timely constructing the steel flower pipe soil nails 302 until excavating to a substrate;

working principle: the triaxial stirring pile is constructed, and then the miniature pile 301 is inserted into the triaxial stirring pile to form a vertical supporting structure, so that the miniature pile 301 and surrounding soil body form curtain water blocking and the strength stability of the soil body is improved, meanwhile, steel pipe pressure grouting is performed in a layered mode to form cement steel pipe soil nails 302, the strength and rigidity of the supporting structure are greatly improved, the miniature pile and the cement steel pipe soil nails 302 form effective constraint to resist the acting force of the soil body after the foundation pit 101 is excavated, the structure is good in integrity, good in seepage prevention effect, high in pile forming process efficiency, free of slurry operation, integrated in functions of an enclosure structure and seepage prevention effect, and free of additional structural measures such as filling piles, compared with other enclosure structure forms achieving the same engineering requirements, the cost is reduced, the work efficiency is improved, and the comprehensive economic benefit advantage is obvious.

In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present utility model, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.

The foregoing is only a preferred embodiment of the present utility model, but the scope of the present utility model is not limited thereto, and any person skilled in the art, who is within the scope of the present utility model, should make equivalent substitutions or modifications according to the technical scheme of the present utility model and the inventive concept thereof, and should be covered by the scope of the present utility model.

Claims

1. The miniature pile combined type supporting structure comprises a soil layer (100), a waterproof curtain and a supporting component (300), and is characterized in that a foundation pit (101) is formed in the top of the soil layer (100), and the waterproof curtain is fixedly connected with the inner wall of the soil layer (100);

the support assembly (300) comprises a micro pile (301), steel flower pipe soil nails (302) and a top pressing beam (303), wherein the micro pile (301) is connected with a soil layer (100) to form a waterproof curtain, the top of the micro pile (301) is fixedly provided with the top pressing beam (303), and the steel flower pipe soil nails (302) distributed at equal intervals along the length direction of the micro pile (301) are arranged on one side of the micro pile.

2. The micro pile combined supporting structure according to claim 1, wherein the steel flower pipe soil nails (302) are obliquely arranged, and at least two layers are distributed along the length direction of the steel flower pipe soil nails (302) and the micro piles (301).