End type prestress batter pile and construction method thereof

Abstract

The invention relates to an end type prestress batter pile which comprises a surrounding purlin, a fender post, a batter pile body and a loading device. The surrounding purlin is supported by the fender post. The batter pile body is driven into soil before excavation, a set interval is reserved between the top end of the batter pile body and the surrounding purlin, the loading device is arranged in the set interval, and presetress is exerted to the batter pile body by the loading device through counter-force provided by the surrounding purlin. According to the end type prestress batter pile, the prestress device is exerted before excavation, and the bearing force of the batter pile body is fast developed; a prestress exerting device is additionally arranged on the existing batter pile body, reaction thrust can be provided for the batter pile body through force transmission equipment, and the batter pile body deforms; therefore the bearing force of the batter pile body is fast developed, foundation pit deformation is controlled, and the surroundings are protected; and a prestress adding device can be recycled.

Description

technical field [0001] The invention relates to a diagonal bracing device used in a foundation pit, in particular to an end-type prestressed diagonal pile and a construction method thereof, belonging to the technical field of foundation pit engineering. Background technique [0002] As the enclosure structure for foundation pit engineering, the inclined steel pipe not only increases the working space in the pit, but also reduces the cost of the support system, and has good application and promotion value. However, in the actual implementation process, a relatively reliable bearing capacity can only be provided when the top of the inclined steel pipe is deformed to a certain extent, which is not good for protecting the surrounding environment. [0003] The publication date is September 4, 2013, and the Chinese patent document with the publication number CN103276739A discloses "a foundation pit support structure with oblique supports and prestressed purlins", which discloses t...

AI Technical Summary

Problems solved by technology

However, in the actual implementation process, only when the top of the inclined steel pipe has a certain deformation can it provide a more reliable bearing capacity, which is not conducive to the protection of the surrounding environment

[0003] The publication date is September 4, 2013, and the Chinese patent document with the publication number CN103276739A discloses "a foundation pit support structure with oblique supports and prestressed purlins", which discloses the use of oblique steel The idea of ​​installing a loading device at the bottom of the support to actively apply prestress, however, setting the loading device on the bottom plate can only be implemented after the earthwork is completely excavated, and it is difficult to recover the loading device; and because the loading device is set on the bottom plate Above, the loading device is far away from the control system at the side of the pit, and the connection line between the loading device and the control device at the side of the pit affects the excavation of the earthwork at the side of the pit and the construction of the main underground structure

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