All-casing-pipe combination

Abstract

An all-casing-pipe combination is composed of a plurality of unit casing pipes. Each unit casing pipe comprises a casing pipe body, an outer connector, an inner connector, a locking disc and a lockingcover, wherein the outer pipe body outer diameter of the casing pipe body is the same with the inner connector ring outer diameter size of the inner connector, an outer connector ring of the outer connector is matched with an inner connector ring of the inner connector, and outer head counter bores and inner head counter bores are symmetrically arranged with equal equally-divided angles in the radial direction of the outer connector ring and the inner connector ring when formed in the outer connector ring and the inner connector ring; and projections of a positioning block of the outer connector and a positioning groove of the inner connector in the vertical direction of the unit casing pipe are overlapped and are complementary. The locking covers are tightened to the locking discs in various outer head counter bores, the inner connector of the upper unit casing pipe and the outer connector of the lower unit casing pipe are completely locked, and accordingly unit casing pipe connection is finished. By means of the all-casing-pipe combination, it is guaranteed that during unit casing pipe connection, alignment is accurate, locking is reliable, stable running of the all-casing-pipecombination is ensured, the pile forming vertical precision is effectively improved, the work intensity is lowered, and the construction efficiency is improved.

Description

technical field [0001] The invention belongs to a full-sleeve combination, in particular to a full-sleeve combination of a full-sleeve length screw pile machine, which is suitable for the construction of a full-sleeve length helical drilled grouting pile. Background technique [0002] In recent years, with the continuous advancement of urbanization, construction projects such as high-rise buildings, railways, highways and bridges have higher and higher requirements for building foundations. The in-situ property of the soil is extremely uneven, and the construction is carried out under the conditions of extremely high strength of the rock mass. The construction technology of full-sleeve length auger bored piles developed in recent years has the advantages of strong adaptability to soil layers, high bearing capacity of single piles, no hole collapse, no mud pollution, high pile-forming efficiency and good pile-forming quality, etc. It is widely used in pile foundation project...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, ordinary long auger bored grouting piles are prone to collapse holes when drilling in thick miscellaneous fills and soil layers with high groundwater levels, and the post-inserted steel cages are easily displaced, resulting in large deviations in the thickness of the protective layer. question

Images