Construction technology for long-spiral cast-in-place pile extruded into rock

Abstract

The invention discloses a construction technology for a long-spiral cast-in-place pile extruded into rock. The construction technology comprises the following steps: 1) embedding a pile casing: embedding the pile casing in a pile position acquired by surveying and setting out; 2) drilling a hole: downward drilling by a long-spiral pile machine and acquiring a constructed and formed hole after drilling in place; 3) lifting a drill rod and protecting a wall with slurry: upward lifting the drill rod after drilling in place till taking the drill rod out of the formed hole, adopting a grouting device and pumping the wall-protecting slurry through the drill rod during the process of upward lifting the drill rod, and protecting the wall with the slurry for the formed hole; 4) putting down a reinforced bar cage; 5) grouting concrete: performing concrete grouting construction on the constructed long-spiral cast-in-place pile extruded into rock through a concrete pumping device and a grouting guide tube. The construction technology provided by the invention has the advantages of simple steps, convenience in realization, high hole quality, good construction effect and capability of effectively solving the problems of the present construction for the long-spiral cast-in-place pile extruded into rock that the hole wall is easy to collapse, the hole is repeatedly cleaned, the construction efficiency is low, and the like.

Description

technical field [0001] The invention belongs to the technical field of foundation construction, and in particular relates to a construction technology of long spiral extruded cast-in-place piles. Background technique [0002] At present, in foundation projects such as construction, water conservancy, and highways, long spiral hole-forming cast-in-situ piles are widely used due to their advantages of high speed, low noise, no need for mud retaining walls, and low construction costs. But there are following defects and deficiencies in the existing common long spiral hole-forming cast-in-place piles: first, the scope of application is limited, and can only be applied in soil layers such as cohesive soil, silt, and filling soil; When the diameter pebble layer, then drilling is difficult or can't be drilled; Therefore, the soil layer adaptability of existing long spiral hole-forming cast-in-place pile is insufficient, and some areas cannot be adopted; Second, the existing long sp...

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Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a construction process for long screw extrusion rock-in-place piles in view of the deficiencies in the above-mentioned prior art. Solve the problems existing in the construction of the existing long spiral extrusion into the rock grouting pile that the hole wall is easy to collapse, the hole needs to be cleaned repeatedly, and the construction efficiency is low.

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