Method for laying rigid long piles and rigid short piles in deep foundation pit support engineering in thick-sludge soft soil area

Abstract

The invention discloses a method for laying rigid long piles and rigid short piles in deep foundation pit support engineering in a thick-sludge soft soil area. The method comprises the following steps: A, collecting the building and structure construction drawings of the deep foundation pit support engineering to define the building elevation of an excavation surface; B, collecting the geologic reports of the deep foundation pit support engineering to learn the field description records and all physical and mechanical test indexes of the soil layers of a site within the range of influence of the deep excavation of a deep foundation pit; C, adopting analysis software to perform routine computation and analysis to all support sections to determine the diameters and lengths of the support piles and the reinforcing bars of pile bodies, and using a design method that the long piles and the short piles are arranged at intervals to perform check designing to section unit bodies. When the short piles are designed, the inserting depths and the reinforcing bars of the pile bodies as well as the diameters of the short piles are determined according to the local traditional experiences of a construction area. According to the method, not only the requirements of all the safety factors required by the computation of the support section unit bodies are met, but also the gaps between the long piles are filled with the short piles, so that the creep deformation of soil bodies between the support piles is controlled, the concrete consumption of the support piles and the consumption of the reinforcing bars of the pile bodies are reduced; the material cost is greatly lowered.

Description

technical field [0001] The invention relates to a method for arranging rigid long and short piles in deep foundation pit enclosure engineering in deep muddy soft soil areas. Background technique [0002] With the development of the economy and the acceleration of urbanization, in order to meet the growing needs of citizens for travel, rail transit transfer, commerce, parking and other functions, in the dense urban center where the land is increasingly tight, large-scale underground projects will be developed in combination with urban construction and transformation. Space has become a necessity, such as multi-storey basements of high-rise buildings, underground railways and underground stations, underground roads, underground parking garages, underground streets, underground shopping malls, underground substations, underground warehouses, underground civil defense fortifications, and various underground civil and industrial facilities etc. In the process of development and u...

AI Technical Summary

Problems solved by technology

However, the enclosure system also has the disadvantages of long construction period and high enclosure cost.

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