CN214169055U

CN214169055U - But pin-connected panel drainage steel pipe slip casting soil nail

Info

Publication number: CN214169055U
Application number: CN202023172464.0U
Authority: CN
Inventors: 宋子文; 刘晓敏; 贾建伟
Original assignee: China Construction Sixth Engineering Division Co Ltd
Current assignee: China Construction Sixth Engineering Division Co Ltd
Priority date: 2020-12-25
Filing date: 2020-12-25
Publication date: 2021-09-10
Anticipated expiration: 2030-12-25

Abstract

The utility model relates to a but pin-connected panel drainage steel pipe slip casting soil nail, include: the flower tube soil nail comprises a flower tube, the side wall of which is provided with a plurality of grouting holes, and the bottom end of the flower tube is conical; the drainage mechanism comprises a drainage pipe, the drainage pipe is positioned on the inner side of the perforated pipe, a grouting cavity with an annular section is formed between the perforated pipe and the drainage pipe, a water inlet cavity is formed at the bottom of the perforated pipe, and the inner cavity of the drainage pipe is connected with the water inlet cavity. The integrated design of soil body reinforcement and drainage of the utility model improves the integration degree of the soil nails, and saves the work flow of independently arranging the water outlet; the arrangement of the drainage cavity reduces the possibility of seeper along the nailing soil interface, and ensures the bonding effect of the nailing soil; the arrangement of the drainage cavity changes the seepage path in the side slope, the seepage direction is changed from facing the active area to facing the stable area, and the stability of the side slope is facilitated; the drain pipe can be pulled out for reuse, so that the construction cost is reduced; the consumption of cement paste is reduced, the solid section is optimized, and the utilization rate of the section is improved.

Description

But pin-connected panel drainage steel pipe slip casting soil nail

Technical Field

The utility model relates to a supporting construction technical field especially relates to a but pin-connected panel drainage steel pipe slip casting soil nail.

Background

The soil nailing wall is a supporting structure for keeping the stability of the side wall and the side slope of a foundation pit during soil excavation, and mainly comprises soil nails, a surface layer and a water prevention and drainage system. Compared with other supporting modes, the soil nailing wall can reasonably utilize the self-stabilizing capability of the soil body, and has the advantages of high flexibility, good earthquake resistance, high construction speed, simple process and low manufacturing cost. The steel perforated pipe grouting soil nail has the advantage of being directly driven into the soil nail, has high uplift resistance, is suitable for soft soil layers such as silt, mucky soil and the like with difficult pore forming, various filling soils and sandy soils, and has wide application.

Groundwater has important influence on the stability of the side wall and the side slope of the foundation pit, and the soil nailing wall is provided with a waterproof and drainage system. At present, drainage measures are mainly used for draining accumulated water possibly existing behind a panel through the arrangement of the drainage holes, but from the practical effect, most of the accumulated water leaks through the soil nail holes, and only a small amount of drainage holes play a role. The seeping of the soil nail holes can weaken the bonding effect of the soil nails and the soil body, and reduce the pulling resistance of the soil nails.

Disclosure of Invention

The utility model aims at solving the defects of the prior art and provides a spliced water-drainable steel pipe grouting soil nail.

The utility model discloses a realize above-mentioned purpose, adopt following technical scheme:

the utility model provides a but pin-connected panel drainage steel pipe slip casting soil nail, includes:

the flower tube soil nail comprises a flower tube, the side wall of which is provided with a plurality of grouting holes, and the bottom end of the flower tube is conical;

the drainage mechanism comprises a drainage pipe, the drainage pipe is positioned on the inner side of the perforated pipe, a grouting cavity with an annular section is formed between the perforated pipe and the drainage pipe, a water inlet cavity is formed at the bottom of the perforated pipe, and the inner cavity of the drainage pipe is connected with the water inlet cavity.

Furthermore, the drain pipe is supported in the floral tube through a centering support, the centering support comprises a support ring, the support ring is sleeved outside the drain pipe, and the support ring is fixedly connected with the inner wall of the floral tube through at least three support legs.

Furthermore, the grouting cavity and the water inlet cavity are formed by separating a grout stopping ring, the grout stopping ring is connected with the inner wall of the perforated pipe in a welding mode, and the water drainage pipe penetrates through the grout stopping ring and is in threaded fit with the grout stopping ring and the perforated pipe.

Furthermore, the bottom of the drain pipe is connected with a filter pipe, the side wall of the filter pipe is provided with a water inlet hole which is convenient for water flowing in the water inlet cavity, and a filter material filling layer is arranged in the water inlet cavity.

Furthermore, the grouting cavity comprises a plurality of standard sections with equal length, and the drain pipe and the floral pipe corresponding to each standard section are arranged in a split manner, so that the grouting cavity is convenient to manufacture and install.

Furthermore, a release agent layer is arranged on the outer side of the drain pipe.

Furthermore, the top of the water discharge pipe extends out of the flower tube and is bent towards one side.

The utility model has the advantages that: the integrated design of soil body reinforcement and drainage of the utility model improves the integration degree of the soil nails, and saves the work flow of independently arranging the water outlet; the arrangement of the drainage cavity reduces the possibility of seeper along the nailing soil interface, and ensures the bonding effect of the nailing soil; the arrangement of the drainage cavity changes the seepage path in the side slope, the seepage direction is changed from facing the active area to facing the stable area, and the stability of the side slope is facilitated; the drain pipe can be pulled out for reuse, so that the construction cost is reduced; the consumption of cement paste is reduced, the solid section is optimized, and the utilization rate of the section is improved.

Drawings

Fig. 1 is a schematic structural view of the present invention;

fig. 2 is a schematic cross-sectional view of the present invention;

in the figure: 1-pipe soil nailing; 11-grouting holes; 12-floral tube; 13-centering the bracket; 14-slurry stopping ring; 2-a drainage mechanism; 21-a drain pipe; 22-a filter tube; 23-a filter material filling layer;

the following detailed description will be made in conjunction with embodiments of the present invention with reference to the accompanying drawings.

Detailed Description

The invention will be further explained with reference to the following figures and examples:

as shown in the figure, but pin-connected panel drainage steel pipe slip casting soil nail includes:

the flower tube soil nail 1 comprises a flower tube 12, the side wall of which is provided with a plurality of grouting holes 11, and the bottom end of the flower tube 12 is conical;

the drainage mechanism 2, drainage mechanism 2 include drain pipe 21, and drain pipe 21 is located the floral tube 12 inboard, forms the slip casting chamber that the cross-section is annular between floral tube 12 and the drain pipe 21, and the floral tube 12 bottom is equipped with into the water chamber, and the drain pipe 21 inner chamber links to each other with into the water chamber.

Further, the water discharge pipe 21 is supported in the flower tube 12 through the centering support 13, the centering support 13 comprises a support ring, the support ring is sleeved outside the water discharge pipe 21, and the support ring is fixedly connected with the inner wall of the flower tube 12 through at least three support legs.

Further, the grouting cavity and the water inlet cavity are formed by separating a slurry stopping ring 14, the slurry stopping ring 14 is connected with the inner wall of the perforated pipe 12 in a welding mode, the water discharging pipe 21 penetrates through the slurry stopping ring 14 and is in threaded fit with the slurry stopping ring 14 and the perforated pipe.

Furthermore, the bottom of the drain pipe 21 is connected with a filter pipe 22, the side wall of the filter pipe 22 is provided with a water inlet hole which is convenient for water flowing in the water inlet cavity, and the water inlet cavity is provided with a filter material filling layer 23.

Furthermore, the grouting cavity comprises a plurality of standard sections with equal length, and the drain pipe 21 and the floral pipe 12 corresponding to each standard section are arranged in a split manner, so that the grouting cavity is convenient to manufacture and install.

Further, a release agent layer is provided outside the drain pipe 21.

Further, the top of the drainage pipe 21 extends out of the flower pipe 12 and is bent to one side.

During construction, the concrete steps are as follows:

(1) determining the design length of the soil nail;

(2) manufacturing a section of the perforated pipe 12 corresponding to the drainage cavity, welding a centering bracket 13 at the opening of the section, inserting a filter pipe 22, and filling a filter material between the filter pipe 22 and the perforated pipe 12 to form a filter material filling layer 23;

(3) manufacturing the corresponding sections of the floral tube 12 of each standard section, welding a grout stop ring 14 at the bottom end of the lowest floral tube 12, welding a centering bracket 13 at the top end of the grout stop ring, and splicing the sections of the floral tube 12 and the sections of the floral tube 12 corresponding to the drainage cavity;

(4) coating a release agent on the outer side of the pipe section of the drainage pipe 21 corresponding to the standard section, so that the pipe section of the drainage pipe 21 is conveniently pulled out of a grouting body after grouting initial setting, inserted into the pipe section of the drainage pipe 21 and screwed with the grout stopping ring 14 and the filter pipe 22 (or the pipe section of the drainage pipe 21 below), and repeating the steps until all the pipe sections of the standard section are completely installed;

(5) spraying a first layer of concrete on the slope, sequentially positioning soil nails, driving the soil nails which are installed in the step (4) and preparing slurry, performing high-pressure grouting on a cavity formed by the perforated pipe 12 and the drain pipe 21, and then sequentially laying a reinforcing mesh and spraying a second layer of concrete;

(6) the outer end of the water discharge pipe 21 is connected with a vacuum pump for pumping water;

(7) after the construction is completed, the drain pipe 21 is rotated and pulled out from the steel pipe grout.

The integrated design of soil body reinforcement and drainage of the utility model improves the integration degree of the soil nails, and saves the work flow of independently arranging the water outlet; the arrangement of the drainage cavity reduces the possibility of seeper along the nailing soil interface, and ensures the bonding effect of the nailing soil; the arrangement of the drainage cavity changes the seepage path in the side slope, the seepage direction is changed from facing the active area to facing the stable area, and the stability of the side slope is facilitated; the drain pipe 21 can be pulled out for reuse, so that the construction cost is reduced; the consumption of cement paste is reduced, the solid section is optimized, and the utilization rate of the section is improved.

The present invention has been described above with reference to the accompanying drawings, and it is obvious that the present invention is not limited by the above embodiments, and various improvements made by the method concept and technical solution of the present invention or directly applied to other occasions without improvement are all within the protection scope of the present invention.

Claims

1. The utility model provides a but pin-connected panel drainage steel pipe slip casting soil nail which characterized in that includes:

the flower tube soil nail (1), the flower tube soil nail (1) comprises a flower tube (12) with a plurality of grouting holes (11) on the side wall, and the bottom end of the flower tube (12) is conical;

the drainage mechanism (2), drainage mechanism (2) are including drain pipe (21), and drain pipe (21) are located floral tube (12) inboard, form between floral tube (12) and drain pipe (21) that the cross-section is annular slip casting chamber, and floral tube (12) bottom is equipped with into water chamber, and drain pipe (21) inner chamber links to each other with into water chamber.

2. The assembled drainable steel pipe grouting soil nail as claimed in claim 1, wherein the drain pipe (21) is supported in the perforated pipe (12) by a centering bracket (13), the centering bracket (13) comprises a support ring, the support ring is sleeved outside the drain pipe (21), and the support ring is fixedly connected with the inner wall of the perforated pipe (12) by at least three support legs.

3. The spliced drainable steel pipe grouting soil nail as claimed in claim 1, wherein the grouting cavity and the water inlet cavity are separated by a grout stop ring (14), the grout stop ring (14) is welded with the inner wall of the perforated pipe (12), and the drain pipe (21) penetrates through the grout stop ring (14) and is in threaded fit with the grout stop ring (14).

4. The spliced drainable steel pipe grouting soil nail as claimed in claim 1, wherein the bottom of the drain pipe (21) is connected with a filter pipe (22), the side wall of the filter pipe (22) is provided with a water inlet hole for water flowing in the water inlet cavity, and the water inlet cavity is provided with a filter material filling layer (23).

5. The spliced drainable steel pipe grouting soil nail as claimed in claim 1, wherein the grouting cavity comprises a plurality of standard sections with equal length, and the drain pipe (21) and the perforated pipe (12) corresponding to each standard section are arranged separately, so that the production and installation are convenient.

6. The spliced drainable steel pipe grouting soil nail as claimed in claim 1, wherein a release agent layer is arranged outside the drain pipe (21).

7. The assembled drainable steel pipe grouting soil nail of claim 1, wherein the top of the drain pipe (21) extends out of the perforated pipe (12) and is bent to one side.