CN212452688U

CN212452688U - Novel seepage-proofing and enclosure structure

Info

Publication number: CN212452688U
Application number: CN202022064559.4U
Authority: CN
Inventors: 鲍利发
Original assignee: PowerChina Huadong Engineering Corp Ltd
Current assignee: PowerChina Huadong Engineering Corp Ltd
Priority date: 2020-09-18
Filing date: 2020-09-18
Publication date: 2021-02-02
Anticipated expiration: 2030-09-18

Abstract

The utility model discloses a novel prevention of seepage, enclose fender structure aims at overcoming the prevention of seepage of foundation ditch and shaft among the prior art, encloses the weak point of fender structure, provides and need not special construction machinery or large construction machinery, and the construction place is little, and the time limit for a project is short, and the investment is economized, need not the open cut construction to can provide a certain prevention of seepage of strutting effect, enclose fender structure for shaft or foundation ditch. The structure comprises connecting beams, perforated pipes and an anti-seepage body, wherein the perforated pipes are arranged around the outer side of an excavation area, the connecting beams are connected with the tops of the perforated pipes, and holes are formed along pipe bodies of the perforated pipes; and the periphery of the floral tube is provided with an anti-seepage body formed by grouting in the floral tube pressure so that cement slurry diffuses and permeates into the surrounding soil body from the open pore under the pressure, and the anti-seepage bodies between adjacent floral tubes are mutually overlapped to form a lap joint area. The utility model discloses provide simultaneously novel prevention of seepage, enclose fender structure.

Description

Novel seepage-proofing and enclosure structure

Technical Field

The utility model relates to a novel prevention of seepage, enclose fender structure is applicable to the prevention of seepage and enclose the fender of relevant trade foundation ditch, shaft open cut construction of basic building such as traffic, municipal administration, railway, water conservancy water and electricity.

Background

Open cut construction of foundation pits and vertical shafts is a common construction procedure in the capital construction industry, and except for rock foundations, the common foundation pit excavation needs to adopt necessary anti-seepage and enclosure measures to ensure the stability of pit walls. The reasonable selection of the anti-seepage and enclosure measures not only relates to the construction cost and the construction period, but also influences the construction safety, and is very important.

In the prior art, the construction mode of the anti-seepage and enclosure structure of the foundation pit and the vertical shaft needs to pour the anti-seepage and enclosure structure on the basis of excavating the vertical shaft or the foundation pit, so that the construction amount is large, open excavation construction is needed, and environmental problems such as slag abandonment and the like are easily caused. And the existing seepage-proofing enclosure structure can not provide obvious supporting effect on the construction process of a vertical shaft or a foundation pit and the final engineering structure, and an additional supporting structure is needed for carrying out structural reinforcement on the seepage-proofing enclosure structure, so that the engineering cost is further improved.

SUMMERY OF THE UTILITY MODEL

The utility model relates to an overcome the above-mentioned weak point of the prevention of seepage of foundation ditch and shaft among the prior art, enclose fender structure, provide and need not special construction machinery or large construction machinery, the construction site is little, and the time limit for a project is short, and the investment is economized, need not the open cut construction to can provide a certain prevention of seepage of supporting effect, enclose fender structure for shaft or foundation ditch.

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

the utility model discloses a novel seepage-proofing and enclosure structure, which comprises a connecting beam, a perforated pipe and a seepage-proofing body, wherein the perforated pipe is arranged around the outer side of an excavation region, the connecting beam is connected with the top of each perforated pipe, and a hole is formed along the pipe body of the perforated pipe; and the periphery of the floral tube is provided with an anti-seepage body formed by grouting in the floral tube pressure so that cement slurry diffuses and permeates into the surrounding soil body from the open pore under the pressure, and the anti-seepage bodies between adjacent floral tubes are mutually overlapped to form a lap joint area.

Preferably, reinforcing bars or tendons are arranged in the perforated pipe, and the reinforcing bars or tendons extend in the perforated pipe along the normal direction of the perforated pipe.

Preferably, the connecting beam is in a continuous structure surrounding the excavated area, and the connecting beam is formed by pouring concrete or welded by using a steel structure.

The utility model discloses simultaneously provide a novel prevention of seepage, enclose construction method who keeps off structure, the method includes following step:

step 1, before engineering excavation, constructing a perforated pipe around the outer side of an area to be excavated, wherein the embedded depth of the perforated pipe needs to exceed the excavation depth of the area to be excavated;

step 2, inserting reinforcing steel bars or reinforcing steel bar bundles in the center of the perforated pipe, and determining the diameter and the number of the reinforcing steel bars according to actual calculation requirements;

step 3, performing pressure grouting on the perforated pipes, and forming an anti-seepage body by diffusing and permeating cement slurry into the surrounding soil body from the open pores under pressure, wherein the grouting pressure needs to be comprehensively determined according to the soil layer property, the depth of a machine pit or a vertical shaft and the spacing between the perforated pipes;

step 4, connecting the flower tubes into a whole through a connecting beam at the tops of the flower tubes;

and 5, excavating an excavation area after finishing the construction of the perforated pipes, pressure grouting and connecting beams.

Preferably, the coupling beam in step 4 may be cast with concrete or welded with a steel structure.

The utility model has the advantages that:

(1) as the main stressed component of the anti-seepage and enclosure structure, the steel perforated pipe and the inserted steel bars thereof are convenient to construct, special construction machinery or large construction machinery is not needed, the construction site is small, the construction period is short, and the investment is saved.

(2) The anti-seepage enclosure structure can not generate open cut and abandoned slag during construction, and belongs to an environment-friendly type.

(3) Parameters such as the diameter of the perforated pipe, the arrangement distance, the grouting pressure and the like can be adjusted according to actual conditions, and the universality is high.

(4) The anti-seepage body is formed by pressure grouting in the perforated pipe, the rigidity and the strength of the member can be increased while the anti-seepage body is prevented, and a certain supporting effect can be provided for the vertical shaft or the foundation pit.

Drawings

Fig. 1 is the utility model discloses a novel prevention of seepage, enclose fender structure and be applied to the floor plan view of foundation ditch engineering.

Fig. 2 is the utility model discloses a novel prevention of seepage, enclose fender structure and be applied to the floor plan view of shaft engineering.

Fig. 3 is a longitudinal sectional view of the novel anti-seepage and enclosure structure of the present invention.

Fig. 4 is a sectional view taken along line B-B of fig. 3.

Fig. 5 is a schematic structural view of the flower tube of the present invention.

Fig. 6 is a cross-sectional view of an embodiment of the floral tube of the present invention.

Fig. 7 is a cross-sectional view of another embodiment of the floral tube of the present invention.

The figure is marked with: 1. a floral tube; 101. opening a hole; 102. reinforcing steel bars; 103. a tendon; 104. cement slurry; 2. A tie-beam; 3. an impervious body; 4. a lap joint region; 5. a soil body; 6. a foundation pit; 601. a foundation pit wall; 7. a shaft; 701. the shaft wall.

Detailed Description

The invention is further described with reference to the accompanying drawings and the detailed description.

The utility model discloses a novel prevention of seepage, enclose fender structure, novel prevention of seepage, enclose that the fender structure is applicable in the construction engineering of foundation ditch 6 and shaft 7. The structure comprises a connecting beam 2, a floral tube 1 and an impermeable body 3. The perforated pipes 1 are arranged around the outer side of an excavation area, and the connecting beams 2 are connected with the tops of the perforated pipes 1. As shown in fig. 1, this scheme is a practical example of the application of the present solution to the construction of the foundation pit 6. The tie beams 2 and floral tubes 1 surround the shape of the foundation pit 6 and are disposed along the outside of the walls 601 of the foundation pit 6. As shown in fig. 2, it is a practical example of the present solution applied to the construction of the shaft 7. The tie beam 2 and the floral tube 1 are arranged around the shape of the shaft 7, along the outside of the shaft wall 701. The connecting beam 2 is in a continuous structure surrounding an excavation area, and the connecting beam 2 is formed by pouring concrete or welding steel structures.

As shown in fig. 3, 4 and 5, an opening 101 is opened along the tube body of the floral tube 1. In actual construction, the steel pipe body is provided with the hole 101 to form the floral tube 1. The head of the floral tube 1 is processed into a closed pointed cone shape, so that the floral tube can conveniently enter the soil body 5. The periphery of the floral tube 1 is provided with an impervious body 3 formed by grouting under the pressure in the floral tube 1 so that cement grout can diffuse and permeate into the surrounding soil body 5 from the open pore 101 under the pressure, and the impervious bodies 3 between the adjacent floral tubes 1 are overlapped to form an overlap joint area 4.

As shown in fig. 6 and 7, reinforcing steel bars 102 or tendons 103 are arranged in the perforated pipe 1, and the reinforcing steel bars 102 or tendons 103 extend in the perforated pipe 1 along the length direction of the perforated pipe 1. The pressure in the perforated pipe 1 is grouted, the perforated pipe 1 is filled with cement slurry 104, and the cement slurry 104 diffuses and permeates into the surrounding soil body 5 from the open pores 101 to form the seepage-proofing body 3 shown in figure 4.

step 1, before engineering excavation, constructing a perforated pipe 1 around the outer side of an area to be excavated, wherein the embedding depth of the perforated pipe 1 needs to exceed the excavation depth of the area to be excavated.

In actual operation, the steel perforated pipe 1 can be arranged around a machine pit or a well wall by hammering or drilling by a drilling machine, and the head of the steel perforated pipe 1 is processed into a closed pointed cone shape so as to conveniently enter a soil body 5. The pipe diameter and the distance of the perforated pipes 1 can be determined by calculation according to the depth of a foundation pit 6 or a well wall, and the arrangement distance is drawn up to meet the requirement of effective lap joint of the anti-seepage bodies 3. The diameter of the floral tube 1 is generally 100-500 mm, and the arrangement distance is generally 300-1000 mm.

And 2, inserting reinforcing steel bars 102 or reinforcing steel bundles 103 in the center of the perforated pipe 1, wherein the diameter and the number of the reinforcing steel bars 102 are determined according to actual calculation requirements.

And 3, performing pressure grouting on the perforated pipe 1, and forming an impervious body 3 by diffusing and permeating cement slurry from the open pore 101 into the surrounding soil body 5 under pressure, wherein the grouting pressure needs to be comprehensively determined according to the soil layer property, the depth of a machine pit or a vertical shaft and the distance between the perforated pipes 1. The grouting pressure is initialized through engineering experience and then corrected according to a field grouting test.

And 4, connecting the flower tubes 1 into a whole through the connecting beam 2 at the tops of the flower tubes 1. The connecting beam 2 in the step 4 can be formed by pouring concrete or welding a steel structure.

And 5, excavating an excavation area after the construction of the perforated pipe 1, the pressure grouting and the connecting beam 2 is completed.

The technical scheme of the utility model in the floral tube 1 and interpolation reinforcing bar 102 or tendon 103 be as prevention of seepage, enclose the main atress component construction convenience of keeping off the structure, need not special construction machinery or large-scale construction machinery, the construction site is little, the time limit for a project is short, invests and economizes. The construction of the structure does not generate open cut and waste slag, and belongs to an environment-friendly type. The anti-seepage body 3 is formed by pressure grouting in the perforated pipe 1, the rigidity and the strength of the member can be increased while the anti-seepage is realized, and a certain supporting effect can be provided for a vertical shaft or a foundation pit 6.

Claims

1. A novel anti-seepage and enclosure structure is characterized by comprising connecting beams, floral tubes and anti-seepage bodies, wherein the floral tubes are arranged around the outer side of an excavation area, the connecting beams are connected with the tops of the floral tubes, and holes are formed along tube bodies of the floral tubes; the periphery of the floral tube is provided with the floral tube internal pressure grouting, so that the cement grout diffuses and permeates into the surrounding soil body from the open pore under the pressure to form an anti-seepage body, and the anti-seepage bodies between the adjacent floral tubes are mutually overlapped to form a lap joint area.

2. The novel anti-seepage and enclosure structure as claimed in claim 1, wherein reinforcing steel bars or reinforcing tendons are arranged in the perforated pipe, and the reinforcing steel bars or reinforcing tendons extend in the perforated pipe along the whole length direction of the perforated pipe.

3. The novel seepage-proofing and enclosure structure as claimed in claim 1, wherein the connecting beam is in the shape of a continuous structure surrounding the excavated area, and the connecting beam is formed by pouring concrete or welding steel structures.