Open caisson foot blade provided with seal brush

Abstract

The invention discloses an open caisson foot blade provided with a seal brush. The seal brush is arranged between the side face of a rock and soil mass behind a wall proximity of the open caisson footblade below a step surface and a rock and soil mass behind a wall; the seal brush comprises brush teeth and a fixed bottom plate, wherein one surface of the fixed bottom plate is connected with the side face of the rock and soil mass behind the wall proximity of the open caisson foot blade; a plurality of brush teeth are arranged on the other surface of the fixed bottom plate at intervals and comprise a plurality of brush bristles and a brush bristle clamping piece; one end of each of the brush bristles is clamped and fixed through the brush bristle clamping piece; the brush bristle clampingpiece is fixed on the fixed bottom plate; and the end, far away from the brush bristle clamping piece, of each of the brush bristles is exposed to the external part of the brush bristle clamping piece. The seal steel brush blocks communication of mud on the inner and outer sides of the wall of the open caisson and also prevents failure of a mud breast wall and surrounding rock soil deformation caused by mud leakage behind the wall, and the frictional resistance between the seal steel brush and the rock soil behind the wall of the open caisson is smaller and does not affect open caisson sinkingduring the open caisson construction process.

Description

technical field [0001] The invention relates to the field of caisson construction, in particular to a caisson blade foot with a sealing brush. Background technique [0002] When carrying out caisson construction in some rock and soil sites with relatively large resistance behind the wall, in order to make the caisson meet the self-weight sinking requirements, the method of filling mud behind the wall to lubricate the wall will be used to reduce the frictional resistance behind the wall to assist sinking. In the process, because the blade foot and the surrounding rock and soil cannot be completely adhered, the mud behind the wall will seep into the well from the bottom of the blade foot, which will affect the construction of the caisson; in addition, when some excavation machinery is used for shaft excavation, the well needs to be injected with water for mud circulation After slag discharge, the internal and external communication of the well wall will also change the height ...

AI Technical Summary

Problems solved by technology

[0002] When carrying out caisson construction in some rock and soil sites with relatively large resistance behind the wall, in order to make the caisson meet the self-weight sinking requirements, the method of filling mud behind the wall to lubricate the wall will be used to reduce the frictional resistance behind the wall to assist sinking. In the process, because the blade foot and the surrounding rock and soil cannot be completely adhered to, the mud behind the wall will seep into the well from the bottom of the blade foot, affecting the construction of the caisson; in addition, when some excavation machinery is used for shaft excavation, the well needs to be injected with water for mud circulation After slag discharge, the internal and external communication of the well wall will also change the height of the inner and outer mud liquid level, which will affect the construction or wall protection effect, and cause major engineering accidents. Therefore, it is necessary to design a caisson blade foot with sealing function to block the sinking The connection of mud inside and outside the well wall

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