Double-row micro steel pipe pile grouting-into-wall partition structure and method

Abstract

The invention discloses a double-row micro steel pipe pile grouting-into-wall partition structure and a method. The partition structure comprises a pair of double-row pile support mechanisms, crown beams disposed at the top of each double-row pile support mechanism and a connecting beam for connecting the two crown beams. The double-row pile support mechanisms each comprise a rear row pile, a front row pile and an intermediate high-pressure jet grouting pile, wherein the front row pile is located on the outside of the rear row pile, and the rear row pile and the front row pile are both steel pipe piles. The steel pipe piles include steel pipes and mixed grout of cement and water glass filling in the steel pipes, and the steel pipes are provided with a plurality of grouting holes in the axial direction. The intermediate high-pressure jet grouting piles are disposed between the rear row piles and the front row piles and connect the two into a whole to form a water retaining curtain wallbetween the piles, and the intermediate high-pressure jet grouting piles are cement grout sprayed on soil between the rear row piles and the front row piles in a high-pressure jet grouting mode. The double-row micro steel pipe pile grouting-into-wall partition structure can be used as a reinforcement protection measure for an existing adjacent infrastructure in the construction process of underground engineering.

Description

technical field [0001] The invention relates to a partition reinforcement method for existing adjacent buildings excavated by underground engineering, in particular to a wall partition structure and method for grouting double-row miniature steel pipe piles in the construction of underground engineering adjacent to existing infrastructure, which is used for In the process of underground excavation in densely built urban areas, the partition reinforcement of adjacent elevated buildings and buildings is carried out. Background technique [0002] In recent years, with the continuous improvement of domestic urbanization level, urban buildings and infrastructure have become more and more dense. However, the development and utilization of urban underground space is constrained by the existing adjacent buildings and infrastructure, and the impact is significant. The development of underground spaces such as underground pedestrian passages, comprehensive pipe corridors, and subway s...

AI Technical Summary

Problems solved by technology

Before the excavation of traditional underground projects, support piles, ground connection walls, anchor rods, etc. are usually used for enclosure. The traditional partition reinforcement technology cannot meet the needs of urban infrastructure due to defects such as poor structural bending resistance, low overall rigidity, and large deformation. Underground engineering excavation space in dense areas is limited, construction schedule is tight and other conditions

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