Sand and gravel stratum dry-excavation clay retaining wall pore-forming cast-in-place pile construction device

Abstract

The invention discloses a sand and gravel stratum dry-excavation clay retaining wall pore-forming cast-in-place pile construction device. The device comprises a drive motor, an installing base plate,a vertical guide rail, a screw, a sliding plate, a rotating rod a, a rotating rod b, a rotating pair a, a rotating pair b, a transverse movement pair, a sliding groove, a steel wire rope and a horizontal plate, a drilling machine applies pressure to achieve inversion, in-hole soil mass pore water enables clay and a hole wall surrounding soil body to be combined, a retaining wall is formed accordingly, and circulation is executed until the design hole depth is obtained. Compared with a mud retaining wall pore-forming cast-in-place pile, a hole digging cast-in-place pile clay retaining wall scheme mainly has the beneficial effects that the clay with a certain water content replaces traditional mud, the technological time is saved, the construction speed is obviously increased, meanwhile, theeconomic benefit is very obvious, the construction speed is higher, a large quantity of water resources are saved, the pile foundation project construction cost is reduced, and the wide application prospect and economic benefit are achieved.

Description

technical field [0001] The invention relates to a construction device for a hole-forming cast-in-place pile for dry-excavating clay retaining walls in gravel strata, and belongs to the technical field of bridge construction technology. Background technique [0002] In recent years, with the construction of a large number of bridges in our country, new construction techniques for bridges are constantly emerging. As a new construction technique for pile foundation construction, rotary excavation has decades of development history in the world, but in China With a history of nearly ten years, it has become a new type of pile hole construction method with the fastest development. The technology of rotary drilling and bored piles is known as "green construction technology", which has the advantages of large installed power, large output torque, and large axial pressure. , maneuverability, high construction efficiency, good pile quality and low environmental pollution, can meet th...

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Problems solved by technology

[0006] As a new construction technology, rotary drilling rig construction is widely used, but there are more and more problems encountered in construction, such as hole collapse, hole depth deviation, reaming, shrinkage cavity, stuck drill, etc. The problem hinders the further development of rotary drilling, and the current research on rotary drilling technology in complex formations is relatively weak

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