Composite consolidation body forming device and forming construction method thereof

Abstract

The invention discloses a composite consolidation body forming device. The composite consolidation body forming device comprises a drill rod, a rotary expansion jetting stirring arm and a power device, wherein the rotary expansion jetting stirring arm comprises at least one set of stirring arm assemblies, each stirring arm assembly is provided with a plurality of drill teeth and a plurality of nozzles communicating with a grouting pipe, and the plurality of drill teeth and the plurality of nozzles are arranged alternately; the power device is used for providing driving force for the drill rod,and when the power device is used for providing the driving force for moving the drill rod in the axial direction for the drill rod, the drill rod is driven to carry out axial displacement, and / or aninner pipe and an outer pipe are driven to carry out relative displacement; and when the power device is used for providing the driving force for rotating the drill rod around the axial direction forthe drill rod, the drill rod drives the rotary expansion jetting stirring arm to rotate. In this way, the composite consolidation body forming device is adopted, a soil body can be cut rotatably while a grouting liquid is jetted, and the grouting liquid and the soil body are fully and uniformly stirred, so that the quality of a formed composite consolidation body is more stable.

Description

technical field [0001] The invention relates to a composite consolidation body forming technology, in particular to a composite consolidation body forming device and a forming method thereof. Background technique [0002] Bored piles are widely used in the field of civil engineering construction because of their advantages of convenient construction and low cost. In order to improve the pile foundation bearing capacity of conventional bored piles, techniques such as expansion / support pile technology and pressure grouting technology at the bottom of the pile and around the pile have appeared in the practice of civil engineering. [0003] At present, in order to further improve the bearing capacity of the pile foundation, during the construction process, high-pressure rotary spraying is used to form a composite consolidation body around the pile body, especially around the expansion plate. However, the high-pressure rotary spraying process has the problem that its forming dia...

AI Technical Summary

Problems solved by technology

However, the high-pressure rotary spraying process has the problem that its forming diameter is small due to the constraints of the process itself, and the diameter cannot be guaranteed due to the influence of geological factors. The forming quality is greatly affected by geological conditions and human factors, and the forming speed is slow and the ground overflows. also cause environmental pollution

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