Method for reinforcing foundation pit enclosure

Abstract

The invention discloses a method for reinforcing foundation pit enclosure. The method is characterized in that a plurality of first multi-curve shaped soil reinforcement blocks are formed by using a first multi-shaft combination drill with three or more shafts to drill downwards to an area below the depth of a foundation pit along the circumferential ground of the foundation pit, so that the enclosure reinforcement is carried out on the edge of the foundation pit, and foundation pit edge reinforcing structures are formed; drill rods of the first multi-shaft combination drill are arranged in anon-linear mode; and parts of construction areas of at least two adjacent drill rods are overlapped. According to the method for reinforcing the foundation pit enclosure, the plurality of multi-curveshaped soil reinforcement blocks are arranged so as to form the foundation pit edge reinforcing structures, the construction overlapping areas in the multi-curve shaped soil reinforcement blocks produced by the multi-shaft combination drill are subjected to breaking construction of at least two drill rods, and after being subjected to multiple breaking construction of the at least two drill rods,soil at the areas is seriously broken, thereby being more com

Description

technical field [0001] The invention relates to the field of construction, in particular to a strengthening method for foundation pit enclosure. Background technique [0002] my country has a vast territory, and different regions and different climates have had a profound impact on the soil layer and soil quality, resulting in the need to pay special attention to the foundation treatment of the building during building construction. [0003] With the development of industry, the demand for high-rise or super high-rise buildings in cities, especially densely populated cities, is gradually increasing, and high-rise or super high-rise buildings have high requirements for the bearing capacity of the foundation. If the bearing capacity of the building foundation is not enough, such as the soft soil foundation with loose and soft soil, various construction measures are required to reinforce the foundation to minimize the impact of the soft soil. [0004] According to experience, ...

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Problems solved by technology

Due to the weak bearing capacity of the soft soil foundation, it is difficult to excavate the foundation pit in the soft soil area. The main difficulty lies in the low bearing capacity and poor stability of the soft soil. In order to ensure the stability of the foundation pit enclosure system, it is usually necessary to set up deep mixing Pile to achieve better enclosure effect

[0006] The existing mixing piles used for foundation pit enclosure are usually cylindrical mixing piles formed by a single-axis stirring rod. Shaft stirring pile, each stirring pile is made by stirring with a stirring rod, and the reason for the setting of the stirring rod is prone to uneven stirring, especially the degree of stirring at the outer edge of the stirring rod stirring area is limited, so that there are unidentified stirring piles in the formed stirring pile. The soil lumps mixed with cement, if the number of soil lumps is large or the volume is large, part of the soil in the formed mixing pile will not be solidified, and a low-quality foundation pit enclosure structure will be obtained. This low-quality enclosure structure Poor water-stopping effect, unsatisfactory use effect

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