CN219034717U

CN219034717U - Construction structure of vertical shaft supporting enclosure

Info

Publication number: CN219034717U
Application number: CN202320101589.9U
Authority: CN
Inventors: 马磊; 钟继凯
Original assignee: Third Construction Co Ltd of China Construction Eighth Engineering Divison Co Ltd
Current assignee: Third Construction Co Ltd of China Construction Eighth Engineering Divison Co Ltd
Priority date: 2023-02-02
Filing date: 2023-02-02
Publication date: 2023-05-16
Anticipated expiration: 2033-02-02

Abstract

The utility model discloses a construction structure of a shaft support enclosure, and belongs to the technical field of shaft construction; the steel bar grating is sequentially connected into a whole along the inner wall of the vertical well region; the outside of the steel bar grating is hung with a steel bar net sheet, and the outside of the net sheet is provided with an injection concrete layer. The construction structure has high construction speed and low construction cost, and can effectively solve the defects of more concrete pouring procedures and long construction period in the prior art; the construction structure is suitable for supporting under the condition of upper soft and lower hard composite stratum.

Description

Construction structure of vertical shaft supporting enclosure

Technical Field

The utility model belongs to the technical field of shaft construction, and particularly relates to a construction structure of a shaft support enclosure.

Background

Shafts can be used in many infrastructure applications, such as temporary tunnels for tunnel construction, later permanent pumping houses, and functional use of certain structures. When the vertical shaft in the prior art is constructed, the shaft wall is firstly supported in advance by adopting an initial supporting mode, so that the stability of the shaft wall is ensured, and then the cast-in-place concrete lining structure is timely constructed. However, the above method has the disadvantages of more steps, longer time and cost. Therefore, a construction structure of a shaft supporting enclosure with short construction period and low manufacturing cost needs to be developed.

Disclosure of Invention

The utility model aims to: the utility model aims to overcome the defects of the prior art and provide a construction structure of a vertical shaft supporting enclosure; the construction structure has high construction speed and low construction cost, and can effectively solve the defects of more concrete pouring procedures and long construction period in the prior art; the construction structure is suitable for supporting under the condition of upper soft and lower hard composite stratum, and has good popularization and application values.

The technical scheme is as follows: the utility model relates to a construction structure of a vertical shaft support enclosure, which comprises a locking collar beam;

the inner side of the locking collar beam is a vertical shaft area, a plurality of steel bar grids are laid on the inner wall of the vertical shaft area, and the steel bar grids are sequentially connected into a whole along the inner wall of the vertical shaft area;

the outside of the steel bar grating is hung with a steel bar net sheet, and the outside of the net sheet is provided with an sprayed concrete layer.

Preferably, the locking collar beam is obtained by casting concrete along the contour line of the vertical shaft; the width of the fore shaft collar beam is not less than 200mm, the height is not less than 800mm, and the water retaining threshold not less than 200mm is turned up.

Preferably, the section of the steel bar grating has 4 sides, and the sides are connected by bolts on welded steel plates.

Preferably, four steel bars and four stirrups are arranged in the steel bar grid in a through length mode.

Preferably, the shaft is bolting.

Preferably, the inserting angle of the anchor rod is perpendicular to the wall of the rectangular vertical shaft, the diameter of the anchor rod is not less than 35mm, the length of the anchor rod is not less than 2500mm, and the whole body of the anchor rod is provided with quincuncial small holes.

Preferably, the diameter of the reinforcing mesh is not less than 8mm, and the reinforcing mesh is hung with the reinforcing grid in a double-layer bidirectional manner.

Preferably, the mesh size of the reinforcement mesh is not less than 150 x 150mm.

Preferably, the inner wall of the vertical shaft is provided with a plurality of construction structures for supporting the enclosure of the vertical shaft, and the space between the adjacent construction structures is 0.5-1.0m.

The beneficial effects are that: (1) Compared with the prior art, the construction structure of the vertical shaft supporting enclosure has the advantages that the construction speed is high, the construction cost is low, the work efficiency is improved by 20% after the construction structure is calculated, the cost is lower by 15%, and the defects of more concrete pouring procedures and long construction period in the prior art can be effectively overcome; the construction structure is suitable for supporting under the condition of upper soft and lower hard composite stratum, and has good popularization and application values.

Drawings

Fig. 1 is an elevation view of a construction structure of a shaft support enclosure.

Fig. 2 is a plan view of a construction structure of a shaft support enclosure.

Fig. 3 is an enlarged view of the reinforcing bar grating.

Reference numerals:

1-locking a collar beam; 2-a steel bar grating; 3-anchor rods; 4-spraying a concrete layer; 5-reinforcing steel bar meshes; 6, reinforcing steel bars; 7-stirrups; 8-gantry crane.

Detailed Description

The technical scheme of the utility model is described in detail below through the drawings, but the protection scope of the utility model is not limited to the embodiments.

Example 1:

as shown in fig. 1-3, the construction structure of the shaft supporting enclosure comprises a locking collar beam 1; the locking collar beam 1 is obtained by casting concrete along the contour line of a vertical shaft; the width of the fore shaft collar beam 1 is not less than 200mm, the height is not less than 800mm, and a water blocking threshold not less than 200mm is turned up.

As shown in fig. 1-3, the inner side of the locking collar beam 1 is a vertical shaft area, a plurality of steel bar grids 2 are paved on the inner wall of the vertical shaft area, 4 sides are arranged on the cross section of the steel bar grids 2, the sides are connected by bolts on welded steel plates, and four steel bars 6 and four stirrups 7 are arranged in the steel bar grids 2 in a through length mode.

As shown in fig. 1-3, the reinforcement grids 2 are sequentially connected into a whole along the inner wall of the vertical well region; and (3) inserting an anchor rod 3 into the integral vertical shaft, wherein the inserting angle of the anchor rod 3 is perpendicular to the wall of the rectangular vertical shaft, the diameter of the anchor rod 3 is not less than 35mm, the length of the anchor rod 3 is not less than 2500mm, and the whole body of the anchor rod 3 is provided with quincuncial small holes. After the anchor rod 3 is inserted, the outside of the steel bar grating 1 is fully hung with a steel bar net 5, the diameter of the steel bar net is not less than 8mm, the mesh size is not less than 150mm, the steel bar net 5 is fully hung in a double-layer bidirectional manner, the steel bar net 1 is arranged at the outer side of the steel bar net 5, and the sprayed concrete layer 4 is arranged at the outer side of the steel bar net 5.

In the implementation process, the concrete construction method of the construction structure of the vertical shaft support enclosure comprises the following steps:

(1) The soil body on the periphery of the upper part of the vertical shaft is loose, a locking notch ring beam 1 with the width of 200mm and of a cast-in-place concrete structure is firstly applied along the contour line of the vertical shaft, the height of the locking notch ring beam 1 is 800mm, and the locking notch ring beam is turned upwards by 200mm to serve as a water blocking threshold.

(2) Because the soil layer at the upper part of the vertical shaft is softer, small mechanical equipment is adopted to cooperate with manual start-up. The lower part can be excavated by blasting or mechanical mode when encountering hard rock, and materials and equipment in the excavating process are lifted by adopting an upper gantry crane 8.

(3) The steel bar grating 2 is arranged along the inner wall of the shaft after excavation, each section of the steel bar grating 2 is provided with four edges and is divided into four sections for installation, if each pitch is longer, the steel bar grating can be divided into a plurality of sections again, and the sections are connected by bolts on welded steel plates. Grid cross-sectional dimensions 160 x 160mm. The steel bar grating comprises four main steel bars with the diameter of 22mm, four stirrups, wherein the diameter of each stirrup is 14mm, and the distance is 250mm.

(4) In order to prevent the collapse of the weak soil around the vertical shaft, the anchor rods 3 are timely inserted after the excavation of one layer of earthwork is completed, and the weak soil is reinforced by rapid grouting. The inserting angle of the anchor rod 3 is vertical to the well wall, the size is 35mm in diameter and 2500mm in length, and the whole body of the pipe is provided with quincuncial small holes. Then, a cement slurry having a cement ratio of 0.6 was injected into the anchor rod 3.

(5) After the construction of the reinforcing bar grids 1 and the anchor rods 3 is finished, reinforcing bar meshes 5 with the diameter of 8mm are fully and bidirectionally arranged to the reinforcing bar grids, and the mesh size of the reinforcing bar meshes 5 is 150mm. After the whole connection of the reinforcing bar grids 1 and the installation of the reinforcing bar meshes 5 are completed, quick spraying of C30 strength grade dry and hard concrete is carried out, and a sprayed concrete layer 4 with the thickness of 200mm is obtained.

(6) And (5) circulating the steps (2) - (5), wherein the inner wall of the vertical shaft is provided with a plurality of construction structures for supporting and enclosing the vertical shaft, and the spacing between the adjacent construction structures is 0.5-1.0m.

As described above, although the present utility model has been shown and described with reference to certain preferred embodiments, it is not to be construed as limiting the utility model itself. Various changes in form and details may be made therein without departing from the spirit and scope of the utility model as defined by the appended claims.

Claims

1. The construction structure of the vertical shaft support enclosure is characterized by comprising a locking collar beam (1);

the inner side of the fore shaft ring beam (1) is a vertical shaft area, a plurality of steel bar grids (2) are paved on the inner wall of the vertical shaft area, and the steel bar grids (2) are sequentially connected into a whole along the inner wall of the vertical shaft area;

the outside of the steel bar grating (2) is hung with a steel bar net sheet (5), and the outside of the net sheet is provided with an shotcrete layer (4).

2. The construction structure of the shaft support enclosure according to claim 1, wherein the locking collar beam (1) is obtained by casting concrete along the contour line of the shaft; the width of the fore shaft collar beam (1) is not less than 200mm, the height is not less than 800mm, and a water blocking threshold not less than 200mm is turned up.

3. The construction structure of a shaft support enclosure according to claim 1, wherein the cross section of the steel bar grating (2) is provided with 4 sides, and the sides are connected by bolts on welded steel plates.

4. A construction structure of a shaft support enclosure according to claim 3, characterized in that four steel bars (6) and four stirrups (7) are arranged in the steel bar grating (2) in a through length mode.

5. A construction structure for a shaft support enclosure according to claim 1, characterized in that the shaft zone is bolting (3).

6. The construction structure of the shaft support enclosure according to claim 5, wherein the insertion angle of the anchor rod (3) is perpendicular to the wall of the rectangular shaft, the diameter of the anchor rod (3) is not less than 35mm, the length of the anchor rod is not less than 2500mm, and quincuncial small holes are formed in the whole body of the anchor rod (3).

7. The construction structure of the vertical shaft support enclosure according to claim 1, wherein the diameter of the reinforcing mesh (5) is not less than 8mm, and the reinforcing mesh (5) is double-layer and two-way hung with the reinforcing grid (2).

8. A construction structure for a shaft support enclosure according to claim 7, wherein the mesh size of the reinforcing mesh (5) is not less than 150 x 150mm.

9. The construction structure of a shaft support enclosure according to claim 1, wherein the inner wall of the shaft area is provided with a plurality of construction structures of the shaft support enclosure, and the distance between the adjacent construction structures is 0.5-1.0m.