Long twist internal hole drilling and pressure pumping combined type reinforced concrete sheet pile

Abstract

The invention discloses a long twist internal hole drilling and pressure pumping combined type reinforced concrete sheet pile. The sheet pile is composed of four long twist internal hole drilling and pressure pumping reinforced concrete bored pile bodies. Firstly, a long twist drill is used for drilling a hole, after hole depth reaches design depth, a concrete pump is started to convey concrete to the underground position through core boring, concrete conveying and drill lifting are carried out at the same time until pouring is completed, meanwhile, three adjacent holes are drilled, grouting is carried out, finally, a reinforcement cage is placed in plain concrete in the four holes through self weight and a pressurization tool, and a sheet pile structure is formed. The sheet pile is a novel foundation pit supporting structure, and is fast in construction speed and high in efficiency, no vibration is generated by counter bores, noise and slurry discharge are avoided, hole shrinkage is reduced, the rigidity of a supporting body is enhanced, pile forming quality is guaranteed, energy saving and environmental protection are achieved, and the soil retaining function is achieved in the supporting process.

Description

technical field [0001] The invention relates to the technical field, in particular to a long auger inner hole pump pressure combined reinforced concrete sheet pile. Background technique [0002] In the prior art, the common pump-in-place pile with long auger drilling is a construction system composed of a long auger drilling machine, a concrete pump and a forced concrete mixer, and is widely used in pile foundation construction. The construction sequence is as follows: The drilling rig is in place, drill the hole to the predetermined elevation, pre-concrete, put the mixed concrete into the concrete pump hopper through the chute, start the concrete pump to pass the concrete through the conveying pipeline such as the core pipe of the drill pipe, and lift the drill while pumping the concrete until The surface becomes piles. The method of pumping in-pipe piles with long helical drilled holes is a pile with fast construction speed and wide adaptability. 60mm pebble layer. [0...

AI Technical Summary

Problems solved by technology

These structural systems ensure the good engineering support of the pile foundation to a certain extent. However, the consumption of engineering materials is large, the construction period of the project is long, and the environmental pollution is serious. In the environment of energy saving and emission reduction, various support technologies need further improvement

Especially for hole-forming cast-in-place piles, the mud generated during the construction process not only pollutes the environment, is difficult to handle, but also destroys the leveling of the construction site and increases the cost.

Images