Large-scale deep foundation pit slope remaining soil digging and pit-in-pit concrete post casting construction method

Abstract

The invention discloses a large-scale deep foundation pit slope remaining soil digging and pit-in-pit concrete post casting construction method, which is characterized in that the earthwork digging comprises the following steps including 1, first layer earthwork digging: the first layer earthwork digging is potted digging; 2, second layer earthwork digging: the second layer earthwork digging is slope remaining digging; 3, third layer earthwork digging: a method that a concrete earthwork slope passage is arranged at the left side of a middle trestle and an automobile directly runs into the passage for loading soil is adopted; 4, slope remaining part earthwork digging; 5, pit-in-pit earthwork digging; 6, pit-in-pit concrete casting construction after the pit-in-pit earthwork digging completion. The large-scale deep foundation pit slope remaining soil digging and pit-in-pit concrete post casting construction method has the advantages that the concrete post casting construction method is adopted, the construction difficulty is small, the cost is low, in addition, the construction period is short, and the risk is low.

Description

technical field [0001] The invention relates to the construction of large deep foundation pits. Background technique [0002] For a long time, the construction cost control and safety of large-scale deep foundation pits have become the focus and difficulty of developers and construction units. Both the support design and construction units adopt relatively conservative support and soil extraction methods for trestle bridges, and large deep foundation pits generally need to be dug 3 to 5 meters further down in the elevator shaft. If the deeper parts are constructed first The base plate is re-constructed with the traditional process of excavating the base plate with a shallow depth, so that the foundation pit construction is not only long-term and costly, but also has a long exposure time of the foundation pit and high construction risks. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a large-scale deep foundatio...

AI Technical Summary

Problems solved by technology

[0002] For a long time, the construction cost control and safety of large-scale deep foundation pits have become the focus and difficulty of developers and construction units. Both the support design and construction units adopt relatively conservative support and soil extraction methods for trestle bridges, and large deep foundation pits generally need to be dug 3 to 5 meters further down in the elevator shaft. If the deeper parts are constructed first The base plate is re-constructed with the traditional process of excavating the base plate with a shallow depth, so that the foundation pit construction is not only long-term and costly, but also has a long exposure time of the foundation pit and high construction risks.

Images