Construction method of cast-in-place pile for drainage pump station

Abstract

The invention discloses a construction method of a cast-in-place pile for a draining pumping station. The construction method includes the following steps that firstly, construction is prepared; secondly, measurement lofting is performed; thirdly, a positioning piece is installed; fourthly, a steel casing is embedded; and fifthly, concrete pouring is performed. The technical scheme of the construction method of the cast-in-place pile for the draining pumping station is provided, the structural design is reasonable, construction is convenient, and before embedding of the steel casing, firstly the positioning piece is installed at a constructing pile position; and due to the design of the positioning piece, the steel casing is firmly limited in a limiting guiding pipe, the perpendicularity of the steel casing during subsequent embedding is guaranteed, it is effectively avoided that the steel casing deviates, the subsequent embedding step of the steel casing is simplified, accurate positioning of the embedded position of the steel casing is improved, the positioning piece can also be used for compacting and shaping soil around a pile column hole, and deformation and collapse of a pilecolumn hole opening are effectively prevented.

Description

technical field [0001] The invention relates to a construction method of cast-in-place piles for drainage pumping stations. Background technique [0002] Cast-in-place pile is a kind of pile made by forming holes in place and pouring concrete or reinforced concrete. Commonly used ones are: (1) Bored cast-in-place piles: Use auger drilling rigs, submersible drilling rigs, etc. to pour concrete into holes on the spot to form piles. There is no vibration and no soil squeezing during construction, but the settlement of the piles is slightly larger. The auger drilling rig is suitable for cohesive soil, sandy soil and artificial filling soil above the groundwater level. The drilled soil block rises along the helical blade on the drill pipe and is discharged out of the hole. The hole diameter is about 300mm, and the drilling depth is 8-12m. Soil quality and water content to select drill pipe. The submersible drilling rig is suitable for cohesive soil, sandy soil, silt and silty s...

AI Technical Summary

Problems solved by technology

In actual operation, the verticality of the steel pipe often deviates during the embedding process, resulting in a deviation between the actual pile hole and the center of the pile position that is greater than the set value, increasing the collapse of the pile hole probability, causing certain security risks

Moreover, when the verticality deviation of the steel pipe is large, the drill bit will drill downward under the guidance of the steel casing, which may cause serious adverse effects on the verticality of the entire hole and even form a waste hole, increasing the construction cost and construction period.

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