阅读说明：本技术 地下结构侧墙的施工方法 (Construction method of underground structure side wall ) 是由 刘涛 朱学银 秦海峰 罗志阳 仲建军 周栋亮 马利腾 何炜 杨宝龙 邵周熠 习轩 于 2021-07-29 设计创作，主要内容包括：本发明涉及一种地下结构侧墙的施工方法,包括：于地下结构的底部浇筑形成底板,且底板靠近围护结构的位置向下凹陷形成凹槽；提供预制墙板,将预制墙板贴合于对应的围护结构并置于凹槽的底面；向凹槽中浇筑混凝土以形成顶面与底板的顶面平齐的后浇结构,使得预制墙板和底板固定连接。本发明有效地解决了现浇侧墙费时费力的问题,通过于地下室底板直接安装预制墙体,无需现场浇筑,大大提升了施工效率,缩短施工时间,节约人力物力,且能够保证施工质量。(The invention relates to a construction method of a side wall of an underground structure, which comprises the following steps: pouring a bottom plate at the bottom of the underground structure, wherein the position, close to the enclosure structure, of the bottom plate is sunken downwards to form a groove; providing a prefabricated wallboard, and attaching the prefabricated wallboard to a corresponding enclosure structure and placing the prefabricated wallboard on the bottom surface of the groove; and pouring concrete into the groove to form a post-pouring structure with the top surface flush with the top surface of the bottom plate, so that the prefabricated wall plate is fixedly connected with the bottom plate. The invention effectively solves the problems of time and labor waste of the cast-in-place side wall, and the prefabricated wall body is directly installed on the basement bottom plate without cast-in-place, thereby greatly improving the construction efficiency, shortening the construction time, saving manpower and material resources and ensuring the construction quality.)

1. A construction method of an underground structure side wall is characterized by comprising the following steps:

pouring a bottom plate at the bottom of the underground structure, wherein the position, close to the enclosure structure, of the bottom plate is sunken downwards to form a groove;

providing a prefabricated wallboard, and attaching the prefabricated wallboard to a corresponding enclosure structure and placing the prefabricated wallboard on the bottom surface of the groove;

and pouring concrete into the groove to form a post-pouring structure with the top surface flush with the top surface of the bottom plate, so that the prefabricated wall plate and the bottom plate are fixedly connected.

2. The method of constructing a sidewall of an underground structure of claim 1, further comprising:

and providing a diagonal brace, obliquely connecting the diagonal brace between the prefabricated wall panel and the bottom plate so as to support and fix the prefabricated wall panel, and removing the diagonal brace after the post-pouring structure is formed by pouring.

3. The method for constructing the sidewall of an underground structure according to claim 1, wherein a plurality of supporting legs are arranged at intervals at the bottom of the prefabricated wall panel;

and placing the supporting feet on the bottom surfaces of the grooves, and embedding the supporting feet in the post-pouring structure after the post-pouring structure is formed by pouring.

4. The construction method of the sidewall of the underground structure as claimed in claim 3, wherein the bottom plate is embedded with bottom plate steel bars, and the part of the bottom plate steel bars corresponding to the groove is exposed outwards, the bottom of the prefabricated wall plate is embedded with fixing bars, and the fixing bars are exposed outwards;

and penetrating the exposed part of the bottom plate reinforcing steel bar on the upper layer through the supporting foot, bending the exposed part of the bottom plate reinforcing steel bar on the lower layer upwards and fixedly connecting the exposed part with the fixed rib, and further pouring concrete in the groove to form the post-pouring structure, so that the corresponding bottom plate reinforcing steel bar and the fixed rib are buried in the post-pouring structure.

5. The method for constructing a sidewall of an underground structure according to claim 3, wherein the bottom surface of the groove is inclined in the extending direction of the prefabricated wall panel;

and filling a steel plate between the supporting foot and the bottom surface of the groove to fill a gap between the supporting foot and the bottom surface of the groove, so that the prefabricated wall board is vertical.

6. The construction method of the side wall of the underground structure as claimed in claim 1, wherein the side of the prefabricated wall panels is provided with arc-shaped grooves along the height direction, and the arc-shaped grooves of two adjacent prefabricated wall panels enclose to form a communication space;

and after the post-pouring structure is formed by pouring, placing reinforcing steel bars in the communicating space and pouring concrete so as to fixedly connect two adjacent prefabricated wallboards.

7. The method of constructing a sidewall of an underground structure according to claim 1, wherein an axillary corner is formed between the post-cast structure and the prefabricated wall panel.

8. The method for constructing a sidewall of an underground structure as claimed in claim 1, wherein a chamfer is formed on the bottom plate near the groove.

9. The method for constructing a sidewall of an underground structure according to claim 1, wherein the groove has an L-shaped cross-section.

Technical Field

The invention relates to the field of building construction, in particular to a construction method of a side wall of an underground structure.

Background

In underground structure work progress, adopt cast-in-place mode to carry out the side wall construction at present mostly, however during cast-in-place construction underground structure side wall, construction speed is slow, and underground construction environment is relatively poor, and material transportation such as template reinforcing bar, stacking are inconvenient, and wall body concrete setting time is longer, arrears construction period, and wall body shaping quality is difficult to control, and construction quality is difficult to guarantee.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, provides a construction method of an underground structure side wall, solves the problem that a cast-in-place side wall is time-consuming and labor-consuming, and greatly improves the construction efficiency, shortens the construction time, saves manpower and material resources and can ensure the construction quality by directly installing a prefabricated wall body on a basement bottom plate without cast-in-place.

The technical scheme for realizing the purpose is as follows:

the invention provides a construction method of a side wall of an underground structure, which comprises the following steps:

pouring a bottom plate at the bottom of the underground structure, wherein the position, close to the enclosure structure, of the bottom plate is sunken downwards to form a groove;

providing a prefabricated wallboard, and attaching the prefabricated wallboard to a corresponding enclosure structure and placing the prefabricated wallboard on the bottom surface of the groove;

and pouring concrete into the groove to form a post-pouring structure with the top surface flush with the top surface of the bottom plate, so that the prefabricated wall plate is fixedly connected with the bottom plate.

According to the construction method of the underground structure side wall, the downward concave groove is formed at the position close to the enclosure structure when the bottom plate is poured, the prefabricated wall plate is arranged on the bottom surface of the groove and is attached to the corresponding enclosure structure, concrete is poured in the groove to form the post-pouring structure, so that the prefabricated wall plate and the bottom plate are fixedly connected, the installation of the prefabricated wall plate is completed, the problem that the cast-in-place side wall is time-consuming and labor-consuming is solved, the prefabricated wall body is directly installed on the basement bottom plate, the in-situ pouring is not needed, the construction efficiency is greatly improved, the construction time is shortened, the manpower and material resources are saved, and the construction quality can be ensured.

The construction method of the underground structure side wall is further improved in that the construction method further comprises the following steps:

and providing a diagonal brace, connecting the diagonal brace between the prefabricated wall panel and the bottom plate in an inclined manner to support and fix the prefabricated wall panel, and removing the diagonal brace after a post-pouring structure is formed by pouring.

The construction method of the side wall of the underground structure is further improved in that a plurality of supporting feet are arranged at the bottom of the prefabricated wall board at intervals;

and placing the supporting feet on the bottom surface of the groove, and embedding the supporting feet in the post-pouring structure after the post-pouring structure is formed by pouring.

The construction method of the side wall of the underground structure is further improved in that the bottom plate steel bars are embedded in the bottom plate, the parts of the bottom plate steel bars, corresponding to the grooves, are exposed outwards, the bottom of the prefabricated wall plate is embedded with the fixing bars, and the fixing bars are exposed outwards;

the exposed part of the bottom plate reinforcing steel bar positioned on the upper layer penetrates through the supporting foot, the exposed part of the bottom plate reinforcing steel bar positioned on the lower layer is bent upwards and fixedly connected with the fixed bar, then concrete is poured in the groove to form a post-pouring structure, and the corresponding bottom plate reinforcing steel bar and the fixed bar are buried in the post-pouring structure.

The construction method of the side wall of the underground structure is further improved in that the bottom surface of the groove is inclined along the extending direction of the prefabricated wall board;

and filling a steel plate between the supporting foot and the bottom surface of the groove to fill a gap between the supporting foot and the bottom surface of the groove, so that the prefabricated wall board is vertical.

The construction method of the underground structure side wall is further improved in that the side part of the prefabricated wall board is provided with an arc-shaped groove along the height direction, and the arc-shaped grooves of two adjacent prefabricated wall boards enclose to form a communication space;

and after a post-pouring structure is formed by pouring, placing reinforcing steel bars in the communicated space and pouring concrete so as to fixedly connect the two adjacent prefabricated wallboards.

The construction method of the underground structure side wall is further improved in that an axillary angle is formed between the post-cast structure and the prefabricated wall board in a pouring mode.

The construction method of the side wall of the underground structure is further improved in that a chamfer is formed at the position, close to the groove, of the bottom plate.

The construction method of the underground structure side wall is further improved in that the section of the groove is L-shaped.

Drawings

Fig. 1 is a schematic view of the construction method of the underground structure side wall according to the present invention when a post-cast structure is not formed by pouring.

Fig. 2 is a schematic diagram of a post-cast structure formed by pouring in the construction method of the underground structure side wall of the invention.

Fig. 3 is a top view of the prefabricated wall panels in the method for constructing the side wall of the underground structure of the present invention.

Detailed Description

The invention is further described with reference to the following figures and specific examples.

Referring to fig. 1, the invention provides a construction method of a side wall of an underground structure, a groove which is sunken downwards is formed at a position close to an enclosure structure when a bottom plate is poured, a prefabricated wall plate is arranged at the bottom surface of the groove and is attached to the corresponding enclosure structure, concrete is poured in the groove to form a post-pouring structure, so that the prefabricated wall plate and the bottom plate are fixedly connected, the installation of the prefabricated wall plate is completed, the problem that the cast-in-place side wall is time-consuming and labor-consuming is solved, the prefabricated wall body is directly installed on a basement bottom plate, the in-situ pouring is not needed, the construction efficiency is greatly improved, the construction time is shortened, manpower and material resources are saved, and the construction quality can be ensured. The construction method of the sidewall of the underground structure according to the present invention will be described with reference to the accompanying drawings.

Referring to fig. 1, fig. 1 is a schematic view illustrating a post-cast structure formed without casting in the construction method of the side wall of the underground structure according to the present invention. The method for constructing the sidewall of the underground structure according to the present invention will be described with reference to fig. 1.

As shown in fig. 1 and 2, the method for constructing the side wall of the underground structure of the present invention includes the following steps:

pouring the bottom plate 12 at the bottom of the underground structure, and sinking the bottom plate 12 close to the building envelope 15 downwards to form a groove 121;

providing a prefabricated wall plate 11, attaching the prefabricated wall plate 11 to the corresponding enclosure structure 15 and placing the prefabricated wall plate 11 on the bottom surface of the groove 121;

concrete is poured into the groove 121 to form the post-cast structure 13 with the top surface flush with the top surface of the bottom plate 12, so that the prefabricated wall panel 11 and the bottom plate 12 are fixedly connected.

Specifically, an axillary angle is formed between the post-cast structure 13 and the prefabricated wall panel 11 in a pouring mode, so that the connection strength between the post-cast structure 13 and the prefabricated wall panel 11 is enhanced.

Preferably, the bottom plate 12 is chamfered near the groove 121 to enhance the connection strength between the post-cast structure 13 and the bottom plate 12.

Specifically, the cross section of the groove 121 is L-shaped.

As a preferred embodiment of the present invention, the present invention further includes:

and providing a diagonal brace 14, connecting the diagonal brace 14 between the prefabricated wall panel 11 and the bottom plate 12 in an inclined manner so as to support and fix the prefabricated wall panel 11, and removing the diagonal brace 14 after the post-pouring structure 13 is formed by pouring.

Furthermore, a plurality of supporting feet 112 are arranged at the bottom of the prefabricated wall panel 11 at intervals;

the supporting feet 112 are placed on the bottom surface of the groove 121, and after the post-cast structure 13 is formed through pouring, the supporting feet 112 are embedded in the post-cast structure 13.

Specifically, the bottom plate reinforcing steel bars are embedded in the bottom plate 12, the portions of the bottom plate reinforcing steel bars corresponding to the grooves 121 are exposed outwards, the fixing ribs are embedded in the bottom of the prefabricated wall plate 11, and the fixing rib portions are exposed outwards;

the exposed part of the bottom plate reinforcing steel bar on the upper layer penetrates through the supporting foot 112, the exposed part of the bottom plate reinforcing steel bar on the lower layer is bent upwards and fixedly connected with the fixing bar, concrete is poured in the groove 121 to form a post-pouring structure 13, and the corresponding bottom plate reinforcing steel bar and the fixing bar are buried in the post-pouring structure 13 to enhance the connection strength of the bottom plate 12 and the prefabricated wall plate 11.

Further, the bottom surface of the groove 121 is inclined in the extending direction of the prefabricated wall panel 11;

a steel plate is filled between the brace 112 and the bottom surface of the groove 121 to fill the gap between the brace 112 and the bottom surface of the groove 121, so that the prefabricated wall panel 11 is vertical, and if the bottom plate of the foundation pit is horizontal, the bottom surface of the groove 121 may not be inclined.

Further, as shown in fig. 3, an arc-shaped groove 111 is formed in the side portion of the prefabricated wall panel 11 along the height direction, and the arc-shaped grooves 111 of two adjacent prefabricated wall panels 11 enclose to form a communication space;

after the post-cast structure 13 is formed by pouring, reinforcing steel bars are placed in the communicated space, concrete is poured, and the two adjacent prefabricated wallboards 11 are fixedly connected, so that the two adjacent prefabricated wallboards 11 are firmly connected.

The specific embodiment of the invention is as follows:

pouring a bottom plate 12 at the bottom of the underground structure, and sinking the bottom plate 12 close to the building envelope 15 downwards to form an L-shaped groove 121;

placing the prefabricated wall panel 11 attached to the enclosure structure 15, placing the supporting feet 112 of the prefabricated wall panel 11 on the bottom surface of the groove 121, wherein gaps are formed between some supporting feet 112 and the bottom surface of the groove 121 due to the fact that the bottom surface of the groove 121 has a certain gradient, and filling steel plates in the gaps;

the bottom plate reinforcing steel bars on the upper layer penetrate through the supporting feet 112, the bottom plate reinforcing steel bars on the lower layer are bent upwards and fixedly connected with the fixing ribs at the bottom of the prefabricated wall plate 11, concrete is poured into the grooves 121 to form a post-pouring structure 13, the top surface of the post-pouring structure 13 is flush with the top surface of the bottom plate 12, and the prefabricated wall plate 11 is fixedly connected with the bottom plate 12;

and placing reinforcing steel bars into a communication space formed by enclosing the arc-shaped grooves 111 of the two adjacent prefabricated wall boards 11, and pouring concrete so as to fixedly connect the two adjacent prefabricated wall boards 11 and form a side wall of an underground structure.

While the present invention has been described in detail and with reference to the embodiments thereof as illustrated in the accompanying drawings, it will be apparent to one skilled in the art that various changes and modifications can be made therein. Therefore, certain details of the embodiments are not to be interpreted as limiting, and the scope of the invention is to be determined by the appended claims.