CN218597172U

CN218597172U - Bottom-expanding foundation pit assembled type retaining wall device suitable for mountain region emergency and recycling

Info

Publication number: CN218597172U
Application number: CN202222672628.9U
Authority: CN
Inventors: 杨世强; 李小来; 苏毅; 王伟东; 程俊翔; 高琛; 李海涛; 杨晓东; 胡军峰; 朱海峰; 郑浩; 王辉
Original assignee: Super High Voltage Co Of State Grid Hubei Electric Power Co ltd; State Grid Corp of China SGCC
Current assignee: Super High Voltage Co Of State Grid Hubei Electric Power Co ltd; State Grid Corp of China SGCC
Priority date: 2022-10-11
Filing date: 2022-10-11
Publication date: 2023-03-10
Anticipated expiration: 2032-10-11

Abstract

An assembly type retaining wall device of an expanded base pit suitable for mountain emergency and recycling comprises an arc-shaped structure body and a transition connecting sheet; a plurality of arc-shaped structural bodies are spliced and fixed into a wall protection ring body, and adjacent wall protection ring bodies are clamped and stacked through transition connecting sheets; wherein, the arc structure body of the bottommost layer is provided with a construction hole, and the construction Kong Gongren worker enters the base pit bottom expanding part. The assembled type wall protecting device for the expanded-base foundation pit, which is suitable for mountain emergency and recycling, can be recovered, and saves the cost; meanwhile, the method is more suitable for the bottom-expanded foundation pit.

Description

Bottom-expanding foundation pit assembled type retaining wall device suitable for mountain region emergency and recycling

Technical Field

The utility model relates to a foundation ditch assembled dado, especially a expand end foundation ditch assembled dado device suitable for mountain region is speedily carried out rescue work cyclic utilization.

Background

In the excavation process of the foundation pit of the mountain emergency engineering, the rapid and safe formation of the stable expanded-base foundation pit hole which meets the design requirements is the key premise for completing the construction of cast-in-place piles such as an iron tower foundation of a power transmission line, a bridge foundation and the like. The bottom-expanding foundation pit hole in the mountain area limited by traffic conditions is mainly excavated manually, the hole wall is easy to collapse and the soil body is easy to collapse in the hole forming process, and great potential safety hazards exist. In order to ensure the safety of foundation constructors and the integrity of the foundation pit shape, a retaining wall structure is required to be arranged on the foundation to stabilize the wall of the excavated foundation pit during hole forming, and then the excavation work of the foundation pit is further deepened.

At present, the conventional foundation pit supporting mode can adopt a cast-in-place reinforced concrete retaining wall structure to support the wall of the foundation pit or an assembled reinforced concrete retaining wall and an assembled metal retaining wall to replace the conventional cast-in-place reinforced concrete retaining wall. The first mode greatly prolongs the construction time of foundation pit emergency engineering, and the second mode is processed in a factory, assembled on site and placed in the foundation pit to be poured together with the foundation pile, so that the formwork supporting, pouring and maintenance links of the cast-in-place type retaining wall are avoided, the construction period is effectively shortened, but the assembled type retaining wall cannot be recycled and reused after the concrete is poured into the foundation pit, the construction cost is high, and the economical efficiency is poor; moreover, for the artificially excavated extended-base foundation pit, the existing assembled retaining wall does not provide enough space on the retaining wall at the bottom layer of the foundation pit for constructors to excavate the extended-base part around the pit bottom, and the applicability in the extended-base foundation pit is poor.

Disclosure of Invention

The technical problem to be solved by the utility model is to provide an assembly type retaining wall device of an expanded foundation pit, which is suitable for mountain emergency and cyclic utilization, can be recovered, and saves the expenditure cost of the retaining wall device; the method is also suitable for the bottom-expanded foundation pit.

In order to solve the technical problem, the utility model discloses the technical scheme who adopts is:

an assembly type retaining wall device of an expanded base pit suitable for mountain emergency and recycling comprises an arc-shaped structure body and a transition connecting sheet; a plurality of arc-shaped structural bodies are spliced and fixed into a wall protection ring body, and adjacent wall protection ring bodies are clamped and stacked through transition connecting sheets; wherein, the arc structure body of the bottommost layer is provided with a construction hole, and the construction Kong Gongren worker enters the base pit bottom expanding part.

The arc structure body comprises a first arc structure body, a second arc structure body and a third arc structure body, wherein a convex connecting part and a concave connecting part are arranged on the left side and the right side of the first arc structure body, the second arc structure body and the third arc structure body respectively, the first arc structure bodies are spliced through the convex connecting parts and the concave connecting parts to form a solid wall protection ring body, the second arc structure bodies are spliced through the convex connecting parts and the concave connecting parts to form a porous wall protection ring body, and the third arc structure bodies are spliced through the convex connecting parts and the concave connecting parts to form a bottom wall protection ring body.

And a lifting hook is fixed on the outer side of the first arc-shaped structural body.

The bottom layer retaining wall ring body and the porous retaining wall ring body are sequentially stacked at the bottom of the foundation pit from bottom to top, and the multiple groups of solid retaining wall ring bodies are sequentially stacked above the porous retaining wall ring bodies.

The bottom layer dado ring body is provided with construction holes, and the porous dado ring body is provided with a plurality of groups of through holes.

The convex connecting part and the concave connecting part are connected through a plurality of groups of bolts.

The cross section of the transition connecting sheet is H-shaped, and the upper and lower grooves of the transition connecting sheet are correspondingly clamped and attached to the upper and lower arc-shaped structural bodies.

The utility model relates to an expand end foundation ditch assembled dado device suitable for mountain region is speedily carried out rescue work and is recycled has following technological effect:

1) The three arc-shaped structural bodies are spliced into a circular tubular retaining wall ring body through the convex connecting parts, the concave connecting parts and the bolts, and the adjacent retaining wall ring bodies of the segments are vertically spliced through the H-shaped transition connecting pieces, so that the whole retaining wall device is simple to assemble, and the operation time of a foundation pit is shortened. The arc-shaped structure body and the transition connecting piece are made of high-strength materials, the wall protection ring body is good in bearing performance, and high in construction safety.

2) The retaining wall ring bodies of all the sections are vertically spliced by the transition connection sheets, when the foundation pit concrete pouring is completed, the retaining wall ring bodies of all the sections can be lifted to the ground by the disassembling steel wire ropes bound at the lifting hooks of the retaining wall ring bodies, the retaining wall is recycled, the construction cost of a pile foundation is reduced, and the economical efficiency is high.

3) And a certain space is reserved in the bottom wall protection ring body, so that the excavation requirement of the foundation pit bottom expanding part can be met, and the applicability is strong. When the concrete pile body is poured in the bottom-expanded foundation pit, the through holes in the porous retaining wall ring body and the bottom retaining wall ring body can ensure that concrete grout is better poured into the bottom-expanded foundation pit, and the concrete pile body is compactly poured, so that the vertical bearing capacity of the bottom-expanded foundation is ensured.

Drawings

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

fig. 1 is a schematic structural diagram of a first arc-shaped structural body of the present invention.

Fig. 2 is a schematic structural diagram of a second arc-shaped structural body according to the present invention.

Fig. 3 is a schematic structural diagram of a third arc-shaped structural body according to the present invention.

Fig. 4 is a top view of a one-segment retaining ring body of the present invention.

Fig. 5 is a cross-sectional view of the middle transition piece of the present invention.

Fig. 6 is a schematic view of the connection between the middle transition connection piece and the upper and lower segments of the present invention.

Fig. 7 is a schematic view of the installation of the middle-layer retaining ring body of the present invention.

Fig. 8 is a schematic view of the installation of the middle porous retaining ring body of the present invention.

Fig. 9 is the utility model discloses well expand end foundation ditch assembled dado installation and accomplish the sketch map.

Fig. 10 is a schematic view of the recovery of the middle retaining ring body of the present invention.

In the figure: the steel wire rope-removing construction method comprises a first arc-shaped structural body 1, a second arc-shaped structural body 2, a third arc-shaped structural body 3, a transition connecting sheet 4, a bottom-layer retaining wall ring body 5, a porous retaining wall ring body 6, a solid retaining wall ring body 7, a detaching steel wire rope 8, a convex connecting portion 9, a concave connecting portion 10, a bolt hole 11, a lifting hook 12, a through hole 13, a construction hole 14, an upper-layer section 15, a lower-layer section 16, unearthed soil 17 and concrete 18.

Detailed Description

As shown in fig. 1 to 8, the assembled dado device for the club-footed foundation pit suitable for mountain emergency recycling comprises a first arc-shaped structural body 1, a second arc-shaped structural body 2, a third arc-shaped structural body 3 and a transition connecting sheet 4. The first arc-shaped structural body 1, the second arc-shaped structural body 2 and the third arc-shaped structural body 3 are basically the same in appearance structure and are arc-shaped plates, a convex connecting portion 9 is reserved at one end of each arc-shaped plate, and a concave connecting portion 10 matched with the convex connecting portion 9 is reserved at the other end of each arc-shaped plate. A plurality of through bolt holes 11 are equidistantly arranged on the male connecting part 9 and the female connecting part 10. Three first arc-shaped structural bodies 1 are sequentially spliced and connected through bolts to form a solid dado ring body 7, three second arc-shaped structural bodies 2 are sequentially spliced and connected through bolts to form a porous dado ring body 6, and three third arc-shaped structural bodies 3 are sequentially spliced and connected through bolts to form a bottom dado ring body 5. The cross sections of the bottom layer dado ring body 5, the porous dado ring body 6 and the solid dado ring body 7 are all circular, the bottom layer dado ring body 5, the porous dado ring body 6 and the solid dado ring body 7 all form a section of the dado device, and the dado ring body of the upper section and the dado ring body of the lower section are overlapped and connected through an H-shaped transition connecting sheet 4.

As shown in fig. 1, a hook 12 is fixed to the outside of the first arc structure 1, and the hook 12 is used to connect to the detaching cable 8.

As shown in fig. 2-3, a plurality of through holes 13 are reserved on the second arc-shaped structural body 2, and a construction hole 14 is reserved on the third arc-shaped structural body 3, wherein the construction hole 14 can realize manual excavation and concrete pouring of the bottom expanding part of the foundation pit.

As shown in fig. 6, the upper and lower clamping grooves of the H-shaped transition connecting sheet 4 are matched with the radian of the arc-shaped side wall of the retaining wall ring body to ensure the attachment.

A sinking installation method of an assembly type retaining wall device of an expanded base pit suitable for mountain emergency and recycling comprises the following steps:

step 1) and as shown in fig. 7, downwards excavating a circular base expanding foundation pit, wherein the excavation depth of a first section of soil body should not exceed the height of a supporting section of the assembled type retaining wall, the ring body of the first section of the retaining wall after installation is ensured to be 0.1 m-0.2 m higher than the ground, so as to prevent sundries from falling into the foundation pit, and when the excavation depth of the first section of the soil body reaches a specified height, stopping continuously excavating the foundation pit.

Step 2), as shown in fig. 7, constructors assemble the bottom layer retaining wall ring body 5 on the ground and vertically place the bottom layer retaining wall ring body at the bottom of the excavated pit in a lifting or bare-handed mode.

And step 3), as shown in fig. 8, continuously downwards excavating the circular expanded-base foundation pit, assembling a plurality of Kong Hubi ring bodies 6 on the ground when the excavation depth reaches the height of one supporting section of the assembled type retaining wall, and binding a hoisting steel wire rope on the lifting hooks of the three second arc-shaped structural bodies 2 respectively. Before the porous retaining wall ring body 6 is hoisted, a plurality of transition connecting pieces 4 are equidistantly placed on the ring surface of the bottom retaining wall ring body 5, then the porous retaining wall ring body 6 is vertically hoisted to the upper part of the foundation pit by means of three hoisting steel wire ropes, the porous retaining wall ring body is stacked in the transition connecting pieces 4 of the bottom retaining wall ring body 5, and the hoisting steel wire ropes are removed.

And step 4), as shown in fig. 9, continuously excavating the circular foundation pit downwards, assembling the first section solid retaining wall ring body 7 on the ground when the excavation depth reaches the height of one supporting section of the assembled retaining wall, and binding a disassembly steel wire rope and a lifting steel wire rope on the lifting hook of each first arc-shaped structural body 1. Before hoisting, a plurality of transition connecting pieces 4 are placed on the upper annular surface of the porous retaining wall ring body 6, the first section of the solid retaining wall ring body 7 is stacked in the transition connecting pieces 4 of the porous retaining wall ring body 6 from top to bottom through hoisting, three hoisting steel wire ropes on the first section of the solid retaining wall ring body 7 are removed at the same time, and three dismantling steel wire ropes bound on the first section of the solid retaining wall ring body 7 are reserved.

And 5) continuously excavating downwards, stopping continuously excavating the foundation pit when the height of each section of the retaining wall ring body is excavated, repeating the step (4), and sequentially stacking the new section of the solid retaining wall ring body 7 in the transition connecting piece 4 of the previous section of the solid retaining wall ring body 7. Along with the continuous excavation of the foundation pit soil body, the installed assembled retaining wall ring bodies sink section by section under the action of self weight, and the retaining wall ring body of the foundation pit opening is always kept higher than the ground by 0.1 m-0.2 m until the foundation pit is excavated to the designed depth.

And 6) when the designed depth of the foundation pit is excavated, excavating the bottom-expanded part of the foundation pit through the construction hole 14 reserved on the bottom layer retaining wall ring body 5 at the bottom of the foundation pit, wherein a part in the figure 9 shows that the foundation pit is excavated and reamed manually through the construction hole 14.

And 7), pouring concrete in the foundation pit to be expanded, lifting the solid retaining wall ring body 7 to the ground by disassembling the steel wire rope 8, and disassembling the solid retaining wall ring body into an arc-shaped structural body for subsequent foundation pit excavation operation after cleaning.

Claims

1. The utility model provides an expand end foundation ditch assembled dado device suitable for mountain region is speedily carried out rescue work and is recycled which characterized in that: comprises an arc-shaped structure body and a transition connecting sheet (4); a plurality of arc-shaped structural bodies are spliced and fixed into a wall protection ring body, and adjacent wall protection ring bodies are clamped and stacked through a transition connecting sheet (4); wherein, the arc structure body at the bottommost layer is provided with a construction hole (14), and the construction hole (14) is used for manually entering the base expanding part of the foundation pit.

2. The assembled dado device of expanded base pit suitable for mountain region emergency and recycle of claim 1, characterized in that: the arc structure body comprises a first arc structure body (1), a second arc structure body (2) and a third arc structure body (3), the left and right sides of the first arc structure body (1), the left and right sides of the second arc structure body (2) and the third arc structure body (3) are respectively provided with a convex connecting portion (9) and a concave connecting portion (10), the first arc structure bodies (1) are connected through the convex connecting portions (9) and the concave connecting portions (10) to form a solid retaining wall ring body (7), the second arc structure bodies (2) are connected through the convex connecting portions (9) and the concave connecting portions (10) to form a porous retaining wall ring body (6), and the third arc structure bodies (3) are connected through the convex connecting portions (9) and the concave connecting portions (10) to form a bottom retaining wall ring body (5).

3. The assembled dado device of expanded base pit suitable for mountain region emergency and recycle of claim 2, wherein: and a lifting hook (12) is fixed on the outer side of the first arc-shaped structural body (1).

4. The assembled dado device of expanded base pit suitable for mountain region emergency and recycle of claim 2, wherein: the bottom layer retaining wall ring body (5) and the porous retaining wall ring body (6) are sequentially stacked at the bottom of the foundation pit from bottom to top, and the multiple groups of solid retaining wall ring bodies (7) are sequentially stacked above the porous retaining wall ring body (6).

5. The assembled dado device of expanded base pit suitable for mountain region emergency and recycle of claim 4, wherein: the bottom layer retaining wall ring body (5) is provided with construction holes (14), and the porous retaining wall ring body (6) is provided with a plurality of groups of through holes (13).

6. The assembled dado device of expanded base pit suitable for mountain region emergency and recycle of claim 2, wherein: the male connecting part (9) and the female connecting part (10) are connected through a plurality of groups of bolts.

7. The assembled dado device of expanded base pit suitable for mountain region emergency and recycle of claim 1, characterized in that: the cross section of the transition connecting sheet (4) is H-shaped, and the upper and lower grooves of the transition connecting sheet (4) are correspondingly clamped and attached to the upper and lower arc-shaped structural bodies.