Method for underpinning and reinforcing existing building based on static pressure rotary jet steel pipe pile and application device
A technology for existing buildings and steel pipe piles, applied in construction, building maintenance, building construction, etc., to achieve the effect of easy implementation, saving construction procedures and costs
Active Publication Date: 2021-12-31
JIAN YAN FOUND ENG
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Problems solved by technology
[0004]
The present invention provides a method and device for underpinning and strengthening existing buildings based on static pressure rotary jet grouting steel pipe piles, which are used to solve foundation reinforcement underpinning and underpinning pile design and convenient construction and underpinning for the reinforcement and transformation of existing buildings Technical issues such as the application of pile devices
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[0055] 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.
[0056] Such as Figure 19 As shown, the scope of underpinning this time is t...
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The invention discloses a method for underpinning and reinforcing an existing building based on a static pressure rotary jet steel pipe pile and an application device. The method comprises the steps that 1, the design length of the rotary jet steel pipe underpinning pile is determined; 2, the rotary jet steel pipe underpinning pile is designed; 3, the application device adopts a spinning all-in-one machine for construction; 4, steel pipe pile section control construction is conducted; 5, pouring is conducted to complete reinforcing bearing platform and reinforcing bearing platform inner ribs, and a soil body on the lower portion is excavated; 6, a new foundation and a new column are constructed; 7, the reinforcing bearing platform and the rotary jet steel pipe underpinning pile are cut off; and 8, construction operation is conducted in a partitioned and step-by-step manner, and underpinning is completed. According to the method for underpinning and reinforcing the existing building based on the static pressure rotary jet steel pipe pile and the application device, by arranging the reinforcing bearing platform inner ribs and the reinforcing bearing platform, a connecting and force bearing foundation is provided; by arranging the rotary jet steel pipe underpinning pile, pile foundation design is conducted on foundation reinforcement of different geological conditions under the existing building, and the rotary jet steel pipe underpinning pile can be further utilized; and by applying the spinning all-in-one machine, construction can be conducted in a narrow space.
Description
technical field [0001] The invention belongs to the technical field of building construction, and in particular relates to a method and an application device for underpinning and reinforcing existing buildings based on static pressure rotary spraying steel pipe piles. 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 and improve the functions of existing buildings. Various forms of underground space development are used to realize underground expansion of existing buildings. Market demand and market capacity huge. [0003] Expansion and reinforcement of the undergroun...
Claims
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IPC IPC(8): E04G23/02E02D27/48E02D7/20E02D5/38E02D27/14E02D5/74E02D5/52E21B3/00E21B7/18
CPCE04G23/0229E02D27/48E02D7/20E02D5/38E02D27/14E02D5/74E02D5/523E21B3/00E21B7/18E02D2250/0023
Inventor 王曙光李湛段启伟李钦锐李鹏潘从建唐君夏长华王浩宇
Owner JIAN YAN FOUND ENG