阅读说明：本技术 适用于静压锚杆桩基础加固的预留桩孔结构 (Reserved pile hole structure suitable for static pressure anchor rod pile foundation reinforcement ) 是由 吴波士 尤雪春 钱锋 吴陈 于 2021-08-05 设计创作，主要内容包括：本发明提供了一种适用于静压锚杆桩基础加固的预留桩孔结构,本发明通过设置于所述静压锚杆桩预留孔内的角钢笼,所述角钢笼的四壁围有拦截混凝土的钢丝网片,采用角钢、钢筋作为骨架封衬钢丝网片作为内衬模板,在承台浇筑时起到拦截混凝土的作用。从而使桩孔达到免模免拆除的效果。(The invention provides a reserved pile hole structure suitable for reinforcing a static pressure anchor pile foundation. Thereby the pile hole achieves the effect of being free from a mould and being free from disassembly.)

1. The utility model provides a reserve stake pore structure suitable for static pressure stock pile foundation is consolidated which characterized in that includes:

a preformed hole of the static pressure anchor rod pile is reserved;

and the angle steel cage is arranged in the reserved hole of the static pressure anchor rod pile, and steel wire mesh sheets for intercepting concrete are surrounded on four walls of the angle steel cage.

2. A pre-existing pile hole structure suitable for static pressure anchor rod pile foundation reinforcement as claimed in claim 1, wherein said angle steel cage comprises:

four vertical angle steels;

and the four vertical angle steels and the plurality of transverse fixed steel bars are connected and fixed to form a framework, and steel wire mesh sheets for intercepting concrete are enclosed on the outer sides of the four walls of the framework.

3. A pre-existing pile hole structure suitable for static pressure anchor rod pile foundation reinforcement according to claim 1, characterized in that the vertical angle steel and the transverse fixing steel bar are connected by welding.

4. A pre-existing pile hole structure suitable for static pressure anchor rod pile foundation reinforcement according to claim 2, wherein the steel wire mesh is a double-layer steel wire mesh.

5. A pre-pile hole structure suitable for static pressure anchor rod pile foundation reinforcement according to claim 4, characterized in that the inner layer steel wire mesh in the double-layer steel wire mesh is a coarse mesh steel wire mesh with larger mesh size; the outer layer steel wire mesh in the double-layer steel wire mesh is a dense mesh steel wire mesh with a small mesh size.

6. A pre-pile hole structure suitable for static pressure anchor rod pile foundation reinforcement according to claim 5, characterized in that the inner steel wire mesh is welded with the vertical angle steel.

7. A pre-pile hole structure suitable for static pressure anchor rod pile foundation reinforcement according to claim 5, characterized in that the outer steel wire mesh is connected with the vertical angle steel through steel nails.

8. A reserved pile hole structure suitable for static pressure anchor rod pile foundation reinforcement according to claim 2, wherein the vertical angle steel is made of a Q235B galvanized material, the size of the vertical angle steel is equal-sided angle steel of No. 4-No. 7, and the length of the vertical angle steel is 5cm more than the height of a bearing platform.

9. A pre-pile hole structure suitable for static pressure anchor pile foundation reinforcement according to claim 5, wherein the material of the inner layer steel wire mesh is Q235B galvanized material, the aperture of the mesh of the inner layer steel wire mesh is a rectangle of 40mm x 40mm to 60mm x 60mm, and the thickness of the inner layer steel wire mesh is 2mm to 4 mm.

10. A pre-pile hole structure suitable for static pressure anchor pile foundation reinforcement according to claim 5, characterized in that the material of the outer steel wire mesh is Q235B galvanized material, and the outer steel wire mesh is 10-20 mesh dense steel wire mesh.

Technical Field

The invention relates to a reserved pile hole structure suitable for reinforcing a static pressure anchor rod pile foundation.

Background

At present, the static pressure anchor rod pile is widely applied as a relatively effective reinforcing method for improving the bearing capacity of an old structure foundation, but most of reinforcing projects adopting a foundation bearing platform cross section expanding form and assisting the anchor rod pile to fill the pile have the problems that the height of the bearing platform is high and the reserved pile hole is irregular in the process of reserving the anchor rod pile hole, if a template is adopted to reserve the pile hole in the bearing platform pouring process, the template in the pile hole wall is difficult to remove during the template removal, and the subsequent pile sealing construction quality is influenced to a certain extent.

For old building reinforcing and transforming projects, in order to meet the diversity of building functions, more bearing structures are newly added on the upper portion, the bearing capacity of the original foundation does not meet the requirements, and the original foundation needs to be reinforced. The static pressure anchor rod pile utilizes a foundation reinforcement mode which is formed by combining a post-planting anchor rod reserved on a foundation and a static pressure pile and is widely applied.

At present, a static pressure anchor rod pile is used as a project for foundation reinforcement, and pile hole reservation is divided into two working conditions. The first working condition is as follows: the cross section of the bearing platform is not increased, the pile holes are cut, and the bearing capacity is difficult to ensure due to the fact that the original bearing platform is cracked and loosened easily due to the fact that the pile holes are cut, so that the reinforcing method is rare. The second working condition is as follows: the pile hole is reserved in advance by increasing the original foundation section, so that the construction quality of the bearing platform can be effectively guaranteed and the method is widely applicable.

The pile hole is established if adopting the template to reserve the pile hole to the reinforcement engineering who adopts basic cushion cap to enlarge the cross-section form to assist with the stock pile to mend the stake at the in-process that stock pile stake hole was reserved to most, and it is higher to reserve the pile hole, and it is irregular to pour the in-process at the cushion cap, then the template in the pile hole wall is difficult to demolish when demolising, influences follow-up pile construction quality and economic interest low to a certain extent, becomes a technical problem who awaits the study urgently.

Disclosure of Invention

The invention aims to provide a reserved pile hole structure suitable for reinforcing a static pressure anchor rod pile foundation.

In order to solve the above problems, the present invention provides a reserved pile hole structure suitable for static pressure anchor rod pile foundation reinforcement, comprising:

a preformed hole of the static pressure anchor rod pile is reserved;

and the angle steel cage is arranged in the reserved hole of the static pressure anchor rod pile, and steel wire mesh sheets for intercepting concrete are surrounded on four walls of the angle steel cage.

Further, in above-mentioned be applicable to reinforced (rfd) reservation stake hole structure of static pressure stock pile foundation, the angle steel cage includes:

four vertical angle steels;

and the four vertical angle steels and the plurality of transverse fixed steel bars are connected and fixed to form a framework, and steel wire mesh sheets for intercepting concrete are enclosed on the outer sides of the four walls of the framework.

Further, in the above-mentioned preformed pile hole structure suitable for static pressure stock pile foundation is consolidated, welded connection between vertical angle steel and the horizontal fixed steel bar.

Further, in the pile hole reserving structure suitable for static pressure anchor rod pile foundation reinforcement, the steel wire mesh is a double-layer steel wire mesh.

Further, in the reserved pile hole structure suitable for reinforcing the static pressure anchor rod pile foundation, the inner layer steel wire mesh in the double-layer steel wire mesh is a coarse mesh steel wire mesh with larger mesh size; the outer layer steel wire mesh in the double-layer steel wire mesh is a dense mesh steel wire mesh with a small mesh size.

Further, in the reserved pile hole structure suitable for static pressure anchor rod pile foundation reinforcement, the inner steel wire mesh sheets are connected with the vertical angle steel in a welding mode.

Further, in the reserved pile hole structure suitable for static pressure anchor rod pile foundation reinforcement, the outer steel wire mesh is connected with the vertical angle steel through steel nails.

Further, in the reserved pile hole structure suitable for static pressure anchor rod pile foundation reinforcement, the vertical angle steel is made of a Q235B galvanized material, the size of the vertical angle steel is equal-side angle steel of No. 4-No. 7, and the length of the vertical angle steel is 5cm more than the height of the bearing platform.

Further, in the reserved pile hole structure suitable for reinforcing the static pressure anchor rod pile foundation, the inner-layer steel wire mesh is made of a Q235B galvanized material, the hole diameter of the meshes of the inner-layer steel wire mesh is a rectangle of 40mm multiplied by 40mm to 60mm multiplied by 60mm, and the thickness of the inner-layer steel wire mesh is 2mm to 4 mm.

Further, in the reserved pile hole structure suitable for reinforcing the static pressure anchor pile foundation, the outer layer steel wire mesh is made of a Q235B galvanized material, and the outer layer steel wire mesh is a 10-20-mesh dense-mesh steel wire mesh.

Compared with the prior art, the angle steel cage is arranged in the preformed hole of the static pressure anchor rod pile, the steel wire mesh sheets for intercepting concrete are surrounded on the four walls of the angle steel cage, angle steel and steel bars are used as framework sealing steel wire mesh sheets as lining templates, and the effect of intercepting concrete is achieved when a bearing platform is poured. Thereby the pile hole achieves the effect of being free from a mould and being free from disassembly.

In addition, the inner wall of the pile hole is sealed and lined by adopting angle steel and steel bars as frameworks to serve as lining templates, the steel wire mesh with large aperture at the inner side serves as a rigidity reinforcing layer, and the steel wire mesh with small aperture at the outer side serves as a concrete interception layer, which is similar to a treatment mode of reserving a post-cast strip. The invention can ensure the pouring quality of the enlarged section of the bearing platform on one hand and can also enhance the connection strength of the newly added concrete and the bearing platform in the pile sealing construction on the other hand. And the pile hole form removal is saved, so that the construction progress of foundation reinforcement is greatly accelerated.

In addition, the structure of the invention can be processed on the construction site, and the operation is simple and convenient, and the construction efficiency is high. By adopting the method, on one hand, the pouring quality of the bearing platform is ensured, on the other hand, the connection strength between the newly added concrete and the bearing platform in the pile sealing construction of the static pressure anchor pile can be enhanced, and the bearing capacity after the foundation is reinforced can be ensured to meet the design requirement.

Drawings

Fig. 1 is a three-dimensional effect diagram of a reserved pile hole structure suitable for reinforcement of a static pressure anchor pile foundation according to an embodiment of the invention;

fig. 2 is a schematic view of the installation position of a reserved pile hole structure suitable for static pressure anchor pile foundation reinforcement according to an embodiment of the invention;

fig. 3 is a front elevation view of a reserved pile hole structure suitable for reinforcement of a static pressure anchor pile foundation according to an embodiment of the invention;

fig. 4 is a sectional view of a reserved pile hole structure suitable for reinforcement of a static pressure anchor pile foundation according to an embodiment of the invention;

in the figure: 1. a preformed hole of the static pressure anchor rod pile is reserved; 2. vertical angle steel; 3. transversely fixing the steel bars; 4. a steel wire mesh sheet; 5. the steel nail is fixed to outer steel wire net piece.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.

As shown in fig. 1 to 4, the present invention provides a reserved pile hole structure suitable for static pressure anchor pile foundation reinforcement, including:

a preformed hole 1 of the static pressure anchor rod pile;

and the angle steel cage is arranged in the preformed hole 1 of the static pressure anchor rod pile, and steel wire mesh sheets 4 for intercepting concrete are surrounded on the four walls of the angle steel cage.

The angle steel and the steel bar are used as framework sealing steel wire meshes and used as lining templates, and the effect of intercepting concrete is achieved when the bearing platform is poured. Thereby the pile hole achieves the effect of being free from a mould and being free from disassembly.

Preferably, the angle iron cage comprises:

four vertical angle steels 2;

and a plurality of transverse fixing steel bars 3 connected with the vertical angle steel 2, four vertical angle steel 2 and a plurality of transverse fixing steel bars 3 are fixedly connected to form a framework, and steel wire mesh sheets 4 for intercepting concrete are enclosed on the outer sides of four walls of the framework.

Preferably, the steel wire mesh 4 is a double-layer steel wire mesh.

Here, four vertical angle steels and a plurality of transverse fixed steel bars are connected and fixed to form a framework. And two layers of steel wire mesh sheets are hung outside the framework formed by the vertical angle steel and the transverse fixed steel bars.

Preferably, the vertical angle steel is connected with the transverse fixed steel bars in a welding mode.

Preferably, the inner steel wire mesh in the double-layer steel wire mesh is a coarse mesh steel wire mesh with larger mesh size as a reinforcing layer; the outer layer steel wire mesh in the double-layer steel wire mesh is a dense mesh steel wire mesh with smaller mesh size and is used as a concrete interception layer.

Preferably, the inner steel wire mesh sheets are connected with the vertical angle steel 2 in a welding mode.

Preferably, the outer layer steel wire mesh is connected with the vertical angle steel 2 through steel nails 5.

Preferably, the vertical angle steel is made of a Q235B galvanized material, the size of the vertical angle steel is equal angle steel No. 4-7, and the length of the vertical angle steel is 5cm more than the height of the bearing platform.

And the strength and the diameter of the transverse fixed steel bar are determined according to the steel bar of the bearing platform required by the design.

Preferably, the inner steel wire mesh sheet is made of a Q235B galvanized material, the aperture of meshes of the inner steel wire mesh sheet is a rectangle of 40mm multiplied by 40mm-60mm multiplied by 60mm, and the thickness of the inner steel wire mesh sheet is 2mm-4 mm.

Preferably, the outer layer steel wire mesh is made of a Q235B galvanized material, and the outer layer steel wire mesh is a 10-20-mesh dense-mesh steel wire mesh.

In one embodiment, the transverse fixation bars are 14mm in diameter and have a strength rating of Q235B.

In a specific embodiment, the aperture of the inner reinforcing steel wire mesh sheet adopts a rectangular specification of 50mm × 50mm, and the thickness is 2 mm. The aperture of the steel wire mesh sheet of the outer dust blocking layer is 16-mesh dense-mesh steel wire mesh.

In a specific embodiment, the angle steel, the steel wire mesh and the steel nails are made of Q235B galvanized materials.

When the method is used specifically, the size and the dimension of the reserved pile hole are determined according to the requirements of a design drawing as shown in fig. 2 and used for manufacturing the framework. After the earth excavation of the independent foundation bearing platform is finished, the old bearing platform can be manufactured according to the figures 1, 3 and 4 during the roughening and rib planting. Constructors firstly fix four vertical angle steels and transverse fixed reinforcing steel bars through welding to form a framework. And then the large-aperture rectangular wire mesh sheets and the angle steels are fixed by welding and serve as a rigidity reinforcing layer to help resist the lateral pressure generated during concrete pouring. And finally, fixing the small-aperture dense-mesh steel wire mesh ash blocking layer on the outermost side on the angle steel through steel nails to complete manufacturing. And reserving a position at a reserved hole of the static pressure anchor rod pile when the bearing platform with the enlarged section is used for binding the steel bars, and then placing the manufactured angle steel cage in the reserved hole of the static pressure anchor rod pile. When the concrete of the bearing platform is poured, the effect of intercepting the concrete can be achieved, and the effect of forming the pile hole without the need of removing a mould is achieved. And meanwhile, the connection strength of the newly added concrete and the bearing platform in the static pressure anchor rod pile sealing construction is enhanced, and the bearing capacity after the foundation is reinforced meets the design requirement.

The invention adopts angle steel and steel bars as frameworks to seal and line the inner wall of a pile hole, uses a double-layer steel wire mesh as a lining template, uses a steel wire mesh with a large aperture at the inner side as a rigidity reinforcing layer, and uses a steel wire mesh with a small aperture at the outer side as a concrete interception layer, which is similar to a treatment mode of reserving a post-cast strip. The invention can ensure the pouring quality of the enlarged section of the bearing platform on one hand and can also enhance the connection strength of the newly added concrete and the bearing platform in the pile sealing construction on the other hand. And the pile hole form removal is saved, so that the construction progress of foundation reinforcement is greatly accelerated.

In addition, the invention can be used for processing from a construction site, and has simple operation and high construction efficiency. By adopting the method, on one hand, the pouring quality of the bearing platform is ensured, on the other hand, the connection strength between the newly added concrete and the bearing platform in the pile sealing construction of the static pressure anchor pile can be enhanced, and the bearing capacity after the foundation is reinforced can be ensured to meet the design requirement.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.

It will be apparent to those skilled in the art that various changes and modifications may be made in the invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.