An intensive permanent support assembly basement structure system and construction method

Abstract

The invention discloses an intensified permanent support assembly type basement structure system and a construction method. The system comprises a basement outer wall and a basement floor with basement structures, and single row or multiple rows of support piles for supporting a foundation pit; a crown beam at the top of the single row of support piles is cast with a concrete construction road on the outer side of the foundation pit as a whole; outer extending supports are arranged between the basement outer wall and the support piles; the crown beam is arranged at the tops of the support piles; the adjacent rows of support piles are connected through the crown beam; and the basement outer wall and the basement floor both adopt prefabricated plates. On the basis of the foundation pit adopting a permanent support structure, the basement part adopts an assembled structure, so that the field construction is convenient and fast, the structure quality is easy to guarantee, the production efficiency can be effectively promoted, the construction garbage is reduced to a greater extent, the organic combination of permanence of the support structure and assembly of the basement structure can be realized, and the organic unification of building structure design and support structure design is realized.

Description

technical field

[0001] The invention relates to underground engineering, in particular to an intensive permanent support assembly type basement structure system and construction method. Background technique

[0002] In the field of building structures, prefabricated reinforced concrete structures have become one of the important directions for the development of building structures. Compared with cast-in-place concrete structures, prefabricated structures have the advantages of easy guarantee of structural quality, convenient and quick on-site assembly, and can effectively improve production efficiency. The reduction of construction waste has good economic and environmental benefits. At this stage, most prefabricated reinforced concrete structures are only used in above-ground building structures. Because basement structures put forward higher requirements for waterproofing and crack control of external walls, prefabricated concrete structures are relatively less used in bas...

Examples

Embodiment 1

[0044] Such as figure 1 As shown, the underground structure of this engineering example is a two-story basement, and the underground structure includes prefabricated basement exterior wall 5, basement floor slab 6, basement floor slab 7, basement exterior wall beam 8 and other main components.

[0045] figure 1 As shown, the foundation pit support structure of this project example is a double-row prestressed pipe pile stepped support structure, which mainly includes support piles 1, prefabricated crown beams 2, and cast-in-place crown beams 3 and other main components.

[0046] figure 1 As shown, the first row of supporting piles in this project example is prestressed pipe piles, and the pile top crown beam 2 is connected with the concrete construction road 4 outside the foundation pit. The concrete construction road 4 outside the foundation pit is a concrete cast-in-place structure. The steel bars are connected to the crown and beam of the outer support piles; the top of th...

Embodiment 2

[0066] The difference between this embodiment and embodiment 1 is:

[0067] The first outrigger support is a reinforced concrete prefabricated support. One end of the outrigger support is connected to the pile body or waist beam of the support pile 1 through the embedded parts, and the other end is connected to the basement outdoor wall floor 6 through the embedded parts. The support connects the support piles with the basement structure. The support piles function as permanent components for a long time, which can effectively reduce the earth pressure on the basement exterior walls and reduce the thickness of the basement exterior walls.

Embodiment 3

[0069] Such as Figure 7 As shown, the underground structure of this engineering example is a three-story basement, and its specific structure and construction process are similar to those in Example 1. and the basement floor slab 6 are all prefabricated slabs, and the basement beam and column components are all concrete cast-in-place components.

[0070] Compared with Example 1, the difference of Example 3 is that the underground structure is a three-story basement, and there are three supports between the supporting structure and the outer wall of the basement. The outrigger 10 is still plain concrete support, and the outrigger 9 of the main structure of the last two floors is a reinforced concrete prefabricated support.

technical field

[0001] The invention relates to underground engineering, in particular to an intensive permanent support assembly type basement structure system and construction method. Background technique

[0002] In the field of building structures, prefabricated reinforced concrete structures have become one of the important directions for the development of building structures. Compared with cast-in-place concrete structures, prefabricated structures have the advantages of easy guarantee of structural quality, convenient and quick on-site assembly, and can effectively improve production efficiency. The reduction of construction waste has good economic and environmental benefits. At this stage, most prefabricated reinforced concrete structures are only used in above-ground building structures. Because basement structures put forward higher requirements for waterproofing and crack control of external walls, prefabricated concrete structures are relatively less used in bas...

Examples

Embodiment 1

[0044] Such as figure 1 As shown, the underground structure of this engineering example is a two-story basement, and the underground structure includes prefabricated basement exterior wall 5, basement floor slab 6, basement floor slab 7, basement exterior wall beam 8 and other main components.

[0045] figure 1 As shown, the foundation pit support structure of this project example is a double-row prestressed pipe pile stepped support structure, which mainly includes support piles 1, prefabricated crown beams 2, and cast-in-place crown beams 3 and other main components.

[0046] figure 1 As shown, the first row of supporting piles in this project example is prestressed pipe piles, and the pile top crown beam 2 is connected with the concrete construction road 4 outside the foundation pit. The concrete construction road 4 outside the foundation pit is a concrete cast-in-place structure. The steel bars are connected to the crown and beam of the outer support piles; the top of th...

Embodiment 2

[0066] The difference between this embodiment and embodiment 1 is:

[0067] The first outrigger support is a reinforced concrete prefabricated support. One end of the outrigger support is connected to the pile body or waist beam of the support pile 1 through the embedded parts, and the other end is connected to the basement outdoor wall floor 6 through the embedded parts. The support connects the support piles with the basement structure. The support piles function as permanent components for a long time, which can effectively reduce the earth pressure on the basement exterior walls and reduce the thickness of the basement exterior walls.

Embodiment 3

[0069] Such as Figure 7 As shown, the underground structure of this engineering example is a three-story basement, and its specific structure and construction process are similar to those in Example 1. and the basement floor slab 6 are all prefabricated slabs, and the basement beam and column components are all concrete cast-in-place components.

[0070] Compared with Example 1, the difference of Example 3 is that the underground structure is a three-story basement, and there are three supports between the supporting structure and the outer wall of the basement. The outrigger 10 is still plain concrete support, and the outrigger 9 of the main structure of the last two floors is a reinforced concrete prefabricated support.

Images