Method for constructing from central area to periphery of ultra-large type underground engineering

Abstract

The invention discloses a method for constructing from the central area to the periphery of an ultra-large type underground engineering, comprising the following steps of: firstly, sloping and excavating to the bottom of a pit in a middle area of the underground engineering; then, directly constructing a bottom plate of a basement in the middle area, and upwards constructing to finish a floorslab structure of the underground engineering; and establishing a peripheral bracing system by using the finished floorslab structure in the middle area as a bracing point to finally finish the construction for the peripheral basement. By utilizing the characteristic of large plane size of the underground engineering, the middle area is sufficiently utilized to slope for construction firstly, the underground engineering in the middle area is constructed upwards, and a peripheral area is provided with a permanent beam slab or temporary bracing as a bracing by taking a top beam slab of the underground engineering in the constructed middle area as the bracing point, so that the defects of causing difficulty in excavating and transporting soil in the peripheral area and controlling the stress direction of the peripheral diagonal bracing, affecting the engineering progress and improving the construction difficulty due to the adoption of the traditional central island construction method is foundationally overcome.

Description

technical field [0001] The invention relates to an underground engineering construction method, in particular to an underground engineering construction method suitable for large plane scale and deep excavation. Background technique [0002] With the large-scale development of basic construction, urban land is becoming more and more tense, and it is developing underground. Exploitation and utilization of underground space is an inevitable trend of future development. Underground projects such as ultra-large and high-depth basements, underground shopping malls, and parking lots have emerged rapidly. Due to the high depth and ultra-large plane scale of underground engineering construction, the traditional method of using enclosure walls combined with internal vertical and horizontal multi-layer support systems makes the construction enclosure cost expensive, and the construction progress, difficulty, and risks are all increased, especially In soft soil areas, it is almost imp...

AI Technical Summary

Problems solved by technology

Due to the high depth and ultra-large plane scale of underground engineering construction, the traditional method of using enclosure walls combined with internal vertical and horizontal multi-layer support systems makes the construction enclosure cost expensive, and the construction progress, difficulty, and risks are all increased, especially In soft soil areas, it is almost impossible to set up internal supports without internal support. However, due to the large scale of the plane, the cost of the support system is very high

Images