Earthwork Excavation Method of Circular Support in Foundation Pit

Abstract

The invention discloses an earthwork excavation method for circular support of a foundation pit, and relates to the technical field of building construction. The key points of the technical scheme are: excavating the foundation pit layer by layer, including dewatering of the foundation pit and excavation of the first layer of earthwork in the foundation pit Excavation, excavation of the second layer of foundation pit earthwork, excavation of the third layer of earthwork excavation of the foundation pit, and earthwork excavation of the foundation pit floor; this excavation technology uses inclined trestle bridges and backfilling pond residue roads to make each layer of earthwork excavation time The earthwork vehicles can directly go deep into any area excavated by the excavator inside the foundation pit, reducing the number of muck and soil reverse transportation, speeding up the excavation speed, and at the same time improving the construction quality and construction efficiency of the earthwork excavation.

Description

technical field [0001] The invention relates to the technical field of building construction, more specifically, it relates to an earthwork excavation method for ring-supported foundation pits. Background technique [0002] In my country's urban land planning, approximately square plots account for the majority, and in the current construction projects in soft soil areas in eastern my country, the enclosure support design of deep foundation pits gradually adopts the ring-supported foundation pit internal support system. The ring has a better stress state. Compared with the traditional symmetrical support, the cost of the ring support is lower under the same support effect. Therefore, this form of support is bound to become more popular in the central area of ​​the city. [0003] Under the ring support system, the earthwork of the foundation pit must be excavated in layers according to the principle of time and space effects, first braced and then excavated. The earthwork exc...

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Problems solved by technology

[0004] However, because the above two methods need to meet the conditions that the ring support can be stressed after the overall formation, it is necessary to excavate and construct the support part covered by the soil slope before the construction of each support, and then refill the part of the soil. Use this soil slope to excavate this layer of earthwork; therefore, this construction method is only suitable for annular support projects with shallow foundation pit depths, and the construction time of this method will increase when the depth of the foundation pit increases and the soil quality of the site is poor , thus affecting the construction quality and construction efficiency of earthwork excavation

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