Construction method and application device for rotary jet grouting static pressure composite pile under low clearance of existing building
A technology of existing buildings and construction methods, applied in construction, building maintenance, building construction, etc., to achieve the effect of saving construction procedures and costs, and being easy to implement
Pending Publication Date: 2021-12-31
JIAN YAN FOUND ENG
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Problems solved by technology
[0004] The invention provides a construction method and an application device of a rotary spray static pressure composite pile under low headroom of an existing building, which are used to solve the design and construction problem of the pile foundation in the reinforcement and transformation of the existing building or the underground layer increase
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Embodiment Construction
[0044] Take a proposed atrium project as an example. The proposed atrium project is located in a back-shaped building in the urban area of Beijing. The surrounding commercial buildings A, B, C, D, E, and F all have basements of 1-3 floors. basement. It is planned to add a sunken plaza on the first floor at the location of the atrium to expand the underground space and communicate with the surrounding buildings. The proposed project is commercial, with 1 underground floor, frame structure, and raft foundation. The plane size is 148m in length, 36m in width, and the buried depth of the foundation is 6.0m. The long side of the north side is adjacent to the commercial building of Block A. The sunken square in the new atrium is partially connected to the basement. The foundation of the commercial building of Block A is buried at a depth of 6.0m. Design and construction of underpinning reinforcement.
[0045] Such as Figure 11 As shown, the scope of underpinning this time is t...
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Abstract
The invention discloses a construction method and an application device for a rotary jet grouting static pressure composite pile under low clearance of an existing building. The method comprises the following steps of: step 1, determining the depth of the composite pile; step 2, designing a lower composite pile; step 3, constructing the application device by adopting a rotary jet grouting all-in-one machine; step 4, controlling the construction of a pile section of the composite pile; and step 5, excavating a lower soil body or gradually reinforcing the soil body. According to the construction method and the application device, a connecting and bearing foundation is provided by arranging reinforcing bearing platform inner ribs and a reinforcing bearing platform; pile foundation design is carried out on foundation reinforcement of different geological foundations under the existing building by arranging the composite pile, and the composite pile can be further utilized; and construction can be carried out in a narrow space by applying the rotary jet grouting all-in-one machine, and rotary jet grouting piles and core piles can be constructed without displacement.
Description
technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a construction method and an application device of a rotary jetting static pressure composite pile under low headroom of an existing building. Background technique [0002] The volume of existing buildings in my country has reached 40 billion square meters (2018). Among them, there are a large number of existing buildings that need to be reinforced and transformed due to various reasons, and the market for strengthening and transforming existing buildings is huge. The development of underground space under existing buildings is an important way to expand the construction area of existing buildings or reinforce the lower soil, and to improve the functions of existing buildings. Various forms of underground space development are used to achieve underground expansion of existing buildings. The market demand and market capacity are huge. [0003] Expansio...
Claims
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Login to View More IPC IPC(8): E04G23/02E02D27/48E02D7/20E02D13/10E02D5/74E02D7/26E02D27/14E02D5/38E02D5/50E21B7/18E21B3/00
CPCE04G23/0229E02D27/48E02D7/20E02D13/10E02D5/74E02D7/26E02D27/14E02D5/38E02D5/50E21B7/18E21B3/00E02D2250/0023
Inventor 王曙光段启伟李湛李钦锐李鹏潘从建唐君夏长华王浩宇
Owner JIAN YAN FOUND ENG