Parallel combined type supporting head

Abstract

The invention discloses a parallel combined type supporting head. The parallel combined type supporting head comprises a plurality of supporting units and connecting pieces, wherein the connecting pieces are arranged between the adjacent supporting units, are connected with the supporting units and are used for adjusting the distance between the supporting units; each supporting unit comprises a jack, a rack A, a rack B, a supporting plate and a transmission piece, wherein the transmission piece comprises a gear A, a planetary gear set, an inner gear ring A and a gear B, the planetary gear setcomprises a sun gear and a plurality of planetary gears, the sun gear is meshed with the planetary gears, the sun gear is connected with the gear A, the planetary gears are meshed with the inner gearring A and are rotationally connected with the inner gear ring A, and the end surface of the gear B is connected with the inner gear ring A; a piston rod A of the jack is connected with the rack A, the rack A is meshed with the gear A, and the rack B is meshed with the gear B and is connected with the supporting plate at the same time; and through the transmission of the planetary gear set, the torque of the jack is amplified, the connecting pieces are arranged, so that the plurality of supporting units can be connected, and the supporting strength is improved.

Description

technical field [0001] The invention relates to the field of foundation pit engineering, in particular to a parallel combined support head. Background technique [0002] Deep foundation pits are mainly divided into two types, one refers to foundation pits whose excavation depth exceeds 5m; the other refers to those whose excavation depth does not exceed 5m, but the geological conditions, surrounding environment and underground pipelines are complicated, or the adjacent buildings are affected. A foundation pit or foundation trench that is safe for objects and structures. [0003] In the construction process of deep foundation pit, foundation pit support is required. Foundation pit support is to ensure the safety of underground structure construction and the surrounding environment of foundation pit. The support, reinforcement and protection measures adopted for the side wall of foundation pit and surrounding environment . [0004] The prior art supports the side wall of the...

AI Technical Summary

Problems solved by technology

[0004] The prior art supports the side wall of the foundation pit by using a steel support to support the side wall of the foundation pit. The end of the steel support is connected with a support head, and the support head is in contact with the foundation pit. Jack, the jack increases the pressure between the support plate and the foundation pit to achieve the purpose of support. The jack has the disadvantages of short stroke and slow ejection speed of the piston. The jack is used as the power to drive the support plate. The stroke of the support plate is short and the support plate moves The speed is slow, and it takes more time to hoist the steel support during the early construction. At the same time, when the side wall of the foundation pit is inclined inward and has a tendency to collapse, the support head cannot be quickly pushed out to the side wall of the foundation pit for support

[0005] Moreover, the support head in the prior art is often only provided with one, the support area is limited, and it is difficult to replace when the support head breaks down after the support is completed.

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