Diving casting cast-in-place pile construction method for constructing in scree layer and sand layer

Abstract

The invention relates to a construction method for an immersed tube compaction cast-in-place concrete pile in the construction in a pebble bed, a puddingstone bed, a sand bed, and a strong weathered mudstone. Double casing pipes are hammered, simultaneously, the inner pipe is extracted from the stratum, then concrete is cast into the outer pipe, the inner pipe is positioned into the outer pipe and presses the surface of the concrete, then the outer pipe is pulled up at uniform speed, and the formation of the cast-in-place concrete pile is completed. Earth is not carried out when the hole is formed, therefore the degree of compaction of the earth among the piles is greatly enhanced, simultaneously, when the pile body concrete is cast, no hole collapse phenomenon of the outer pipe appears in the hole, even slurry wall protection is not required to be adopted, in addition, no bottom settlings exists at the bottom of the pile, thereby the characteristic that the bearing capacity of a single pile is high is ensured, and the invention has the advantages of no pollution on site and quick construction speed.

Description

technical field [0001] The invention relates to a construction method of concrete pouring piles, in particular to a construction method of sinking pipe pouring piles constructed in hard soil layers such as pebble layers and sand layers. technical background [0002] With the continuous development of industrial and civil construction, there are more and more high-rise buildings, and at the same time, different types of stratum soils are often encountered, such as pebble layers, round gravel layers, sand layers, strong weathered mudstone, etc., on such strata In the construction of high-rise buildings, due to the low bearing capacity of the natural foundation and uneven strata, percussion drilling and bored piles are usually used; however, the construction of pile foundations in the above strata has a long cycle, high cost, and difficult control of quality; In case of landslides, mud retaining technology must be used, which seriously pollutes the construction site and reduces...

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of industrial and civil construction, there are more and more high-rise buildings, and at the same time, different types of stratum soils are often encountered, such as pebble layers, round gravel layers, sand layers, strong weathered mudstone, etc., on such strata In the construction of high-rise buildings, due to the low bearing capacity of the natural foundation and uneven strata, percussion drilling and bored piles are usually used; however, the construction of pile foundations in the above strata has a long cycle, high cost, and difficult control of quality; In case of landslides, mud retaining technology must be used, which seriously pollutes the construction site and reduces the bearing capacity of single piles