CN218882227U

CN218882227U - Construction structure of circular shaft of precast concrete structure

Info

Publication number: CN218882227U
Application number: CN202320101595.4U
Authority: CN
Inventors: 马磊; 钟继凯; 张洪涛; 沈兴东
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: 2023-04-18
Anticipated expiration: 2033-02-02

Abstract

The utility model discloses a construction structure of a circular shaft with a precast concrete structure, belonging to the technical field of shaft construction; the construction structure is high in construction speed and low in construction cost, and can effectively solve the problems that in the prior art, in-situ pouring is needed during construction of a circular shaft, the number of working procedures is large, the construction period is long and the like; the construction structure is suitable for construction of vertical wells in a soft upper stratum and a hard lower stratum, and has good popularization and application values.

Description

Construction structure of circular shaft of precast concrete structure

Technical Field

The utility model belongs to the technical field of the shaft construction, concretely relates to construction structures of circular shaft of precast concrete structure.

Background

The circular shaft can be applied to the fields of a plurality of infrastructures, such as temporary passages for tunnel construction, later permanent pump rooms, functional use of certain building structures and the like. In the prior art, a circular shaft is generally used for supporting a shaft wall in an initial supporting mode, and then a cast-in-place concrete lining structure is applied in time to ensure the stability of the shaft wall. However, the method has the disadvantages of more working procedures, longer construction period and relatively higher manufacturing cost. Therefore, it is required to develop a construction structure of a circular shaft having a short construction period and a low cost.

Disclosure of Invention

The purpose of the invention is as follows: the utility model aims to provide a construction structure of a circular shaft with a precast concrete structure aiming at the defects of the prior art; the construction structure is high in construction speed and low in construction cost, and can effectively solve the problems that in the prior art, in-situ pouring is needed during construction of a circular shaft, the number of working procedures is large, the construction period is long and the like; the construction structure is suitable for the construction of vertical wells in the upper soft and lower hard stratum and has good popularization and application values.

The technical scheme is as follows: construction structures of circular shaft of precast concrete structure, include: a fore shaft collar beam; the inner side of the locking collar beam is of an earthwork structure of a circular vertical shaft, a plurality of precast blocks of concrete structures are mounted on the inner wall of the earthwork structure, and the precast blocks are connected through concave-convex structures respectively.

Preferably, the locking collar beam is obtained by pouring concrete along the contour line of the vertical shaft; the width of the locking collar beam is not less than 200mm, the height of the locking collar beam is not less than 800mm, and a water retaining sill which is not less than 200mm is turned upwards; and a steel reinforcement mesh framework is arranged inside the locking collar beam.

Preferably, the earthwork structure includes one layer of earthwork, two layers of earthwork, and three layers of earthwork.

Preferably, the bottom of the first layer of earthwork, the second layer of earthwork and the third layer of earthwork is provided with a foot locking anchor rod in an inserting mode.

Preferably, the insertion angle of the foot-locking anchor rod is perpendicular to the wall of the circular well, the diameter of the foot-locking anchor rod is not less than 35mm, the length of the foot-locking anchor rod is not less than 2500mm, and small holes are arranged in a quincunx shape on the whole body of the foot-locking anchor rod.

Preferably, the precast blocks include first precast blocks and second precast blocks, which are alternately arranged and connected by a concave-convex structure.

Preferably, the height of the precast block is 0.5-1.0m, the width is 200mm, and the arc length is 1m.

Preferably, at least two expansion blocks are arranged between the structures formed by connecting the plurality of precast blocks in the circular well.

Preferably, the expansion block has the same width and height as the precast block and has the length of 200mm.

Has the advantages that: (1) The construction speed of the construction structure of the circular shaft of precast concrete structure is fast, and efficiency can promote 20% through calculating. The construction structure also has the advantage of low manufacturing cost, and can effectively solve the problems of multiple working procedures, long construction period and the like in the field pouring process required during the construction of the circular shaft in the prior art; the construction structure is suitable for the construction of vertical wells in the upper soft and lower hard stratum and has good popularization and application values.

Drawings

Fig. 1 is an elevation view of a construction structure of a circular shaft of a precast concrete structure.

Fig. 2 is a plan view (section I-I) of a construction structure of a circular shaft of a precast concrete structure.

Reference numerals:

1-a fore shaft collar beam; 2-a layer of earthwork; 3-two layers of earthwork; 4-three layers of earthwork; 5-locking the foot anchor rod; 6-a first precast block; 7-a second prefabricated section; 8, gantry crane; 9-expansion block.

Detailed Description

The technical solution of the present invention is described in detail below with reference to the accompanying drawings, but the scope of the present invention is not limited to the embodiments.

Example 1:

as shown in fig. 1 to 2, the construction structure of the circular shaft of the precast concrete structure comprises: the locking collar beam 1 is obtained by pouring concrete along the contour line of the vertical shaft. Specifically, the width of the fore shaft collar beam 1 is not less than 200mm, the height is not less than 800mm, a water retaining sill of not less than 200mm is formed in the upward turning mode, and a steel reinforcement mesh framework is arranged inside the fore shaft collar beam 1. The inside earthwork structure that is circular shaft of fore shaft circle roof beam 1, a plurality of concrete structure's prefabricated section are installed to the earthwork structure inner wall, link through concave convex type structure respectively between the prefabricated section.

As shown in fig. 1 to 2, in the construction structure, an earthwork structure includes a first layer of earthwork 2, a second layer of earthwork 3, and a third layer of earthwork 4, and a foot-locking anchor rod 5 is inserted into the bottoms of the first layer of earthwork 2, the second layer of earthwork 3, and the third layer of earthwork 4. Specifically, the insertion angle of the foot-locking anchor rod 5 is perpendicular to the wall of the circular well, the diameter of the foot-locking anchor rod 5 is not less than 35mm, the length of the foot-locking anchor rod 5 is not less than 2500mm, and the whole body of the foot-locking anchor rod 5 is provided with quincunx arranged small holes.

As shown in fig. 1 to 2, in the construction structure, the precast blocks include a first precast block 6 and a second precast block 7, and the first precast block 6 and the second precast block 7 are alternately arranged and connected by a concave-convex structure. Wherein, the height of the precast block is 0.5-1.0m, the width is 200mm, and the arc length is 1m. In addition, at least two expansion blocks 9 are arranged between the structures formed by connecting the precast blocks in the circular well, the width and the height of each expansion block 9 are the same as those of the precast blocks, and the length of each expansion block is 200mm.

In the implementation process, the specific construction method of the construction structure of the circular shaft with the prefabricated concrete structure comprises the following steps:

(1) The soil body on the periphery of the upper part of the vertical shaft is loose, a cast-in-place concrete structure ring beam with the width of 200mm is firstly constructed along the contour line of the vertical shaft, the height of the ring beam is 800mm, and the ring beam is turned upwards by 200mm to be used as a water retaining sill. A steel bar net framework is arranged in the steel bar net frame.

(2) Because the soil layer in the upper part of the shaft is weak, small mechanical equipment is adopted to cooperate with manual operation to excavate the earthwork 2 in one layer, and the excavated earthwork is transported outside by adopting an upper gantry crane 8 lifting device. In order to prevent that the peripheral weak soil body of shaft from collapsing, in time beat and insert lock foot stock 5 after 2 excavations of one deck earthwork are accomplished to quick slip casting reinforcement weak soil body in to lock foot stock 5, the insertion angle of lock foot stock 5 is perpendicular with the round shaft wall of a well, and 35mm is no less than to the diameter of lock foot stock 5, and 2500mm is no less than to length, and the hole is arranged to the plum blossom shape of lock foot stock 5's whole body.

(3) After the reinforcement of the weak soil body of the one layer of earthwork 2 is finished, the precast block of the concrete structure is installed along the inner wall of the one layer of earthwork 2, wherein the precast block comprises a first precast block 6 and a second precast block 7, and the first precast block 6 and the second precast block 7 are connected in a concave-convex mode. Meanwhile, expansion blocks 9 are arranged on two sides of the periphery of the round well, and the purpose is to further increase the embedding and squeezing effect between the precast blocks and the friction force between the precast blocks and the well wall, so that the precast blocks are prevented from integrally falling off when the lower-layer earthwork is excavated. The width and height of expansion block 9 are the same with the prefabricated block, and length is about 200mm, and after the prefabricated block is installed, the template is erected on the inner side, the reinforcing steel bar framework is arranged in the template, and self-compacting C50 strength grade expansion concrete is poured into the template by manpower inwards.

(4) And (4) excavating the second-layer earthwork 3 and the third-layer earthwork 4 by referring to the methods in the steps (2) and (3) to obtain a circular shaft.

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

Claims

1. The utility model provides a construction structures of circular shaft of precast concrete structure which characterized in that includes: a fore shaft collar beam (1); the inner side of the fore shaft ring beam (1) is of an earthwork structure of a circular shaft, a plurality of precast blocks of concrete structures are mounted on the inner wall of the earthwork structure, and the precast blocks are connected through a concave-convex structure respectively.

2. The construction structure of a circular shaft of a precast concrete structure according to claim 1, characterized in that the collar beam (1) is obtained by casting concrete along the shaft contour; the width of the locking collar beam (1) is not less than 200mm, the height is not less than 800mm, and a water retaining sill which is not less than 200mm is turned upwards; and a steel bar mesh framework is arranged inside the locking collar beam (1).

3. Construction structure for a circular shaft of precast concrete structure according to claim 1, characterized in that the earthwork structure comprises one-story earthwork (2), two-story earthwork (3) and three-story earthwork (4).

4. Construction structure of a circular shaft of precast concrete structure according to claim 3, characterized in that locking anchor rods (5) are inserted at the bottom of the one-storey earthwork (2), the two-storey earthwork (3) and the three-storey earthwork (4).

5. The construction structure of a circular shaft of a precast concrete structure according to claim 4, characterized in that the insertion angle of the foot-locking anchor rod (5) is perpendicular to the wall of the circular shaft, the diameter of the foot-locking anchor rod (5) is not less than 35mm, and the length is not less than 2500mm;

the whole body of the locking foot anchor rod (5) is provided with quincunx arrangement small holes.

6. The construction structure of a prefabricated concrete structure circular shaft as claimed in claim 1, wherein the prefabricated blocks comprise first prefabricated blocks (6) and second prefabricated blocks (7), and the first prefabricated blocks (6) and the second prefabricated blocks (7) are alternately arranged and connected by a concavo-convex structure.

7. The construction structure of the prefabricated concrete structure circular shaft as claimed in claim 6, wherein the prefabricated block has a height of 0.5-1.0m, a width of 200mm and an arc length of 1m.

8. Construction structure of a circular shaft of precast concrete structure according to claim 1, characterized in that at least two expansion blocks (9) are provided between the structures in which the precast blocks are coupled inside the circular shaft.

9. Construction structure for a circular shaft of precast concrete structure according to claim 8, characterized in that the expansion block (9) has the same width and height as the precast block and the length of 200mm.