Drilling and tunneling type full-sleeve combination

Abstract

The invention discloses a drilling and tunneling type full-sleeve combination. The drilling and tunneling type full-sleeve combination is composed of a plurality of unit sleeves and a bottom sleeve, each unit sleeve comprises a sleeve body, an outer joint, an inner joint, a locking disc and a locking cover, and the bottom sleeve comprises a bottom sleeve body, an outer joint, a locking cover, a tool rest seat and a plurality of cutting tool bodies; outer joint rings of the outer joints and inner joint rings of the inner joints are mutually matched; outer joint counterbores and inner joint counterbores are symmetrically formed at equal division angles in the radial direction of the outer joint rings and the inner joint rings when arranged on the outer joint rings and the inner joint rings respectively; outer joint positioning blocks of the unit sleeves, inner joint positioning grooves of the unit sleeves, and an outer joint positioning block of the bottom sleeve are overlapped and mutually complementary in the projection of the vertical direction of the unit sleeves and the bottom sleeves; and one locking cover is screwed on the corresponding locking disc in each outer joint counterbore to achieve full locking connection between the unit sleeves, and between the unit sleeves and the bottom sleeve. According to the drilling and tunneling type full-sleeve combination, accurate alignment and reliable locking of the full-sleeve combination are ensured, and it is ensured that the full-sleeve combination is stable in operation, powerful in drilling and tunneling, so that the construction efficiency and the pile foundation hole forming precision are improved.

Description

technical field [0001] The invention belongs to a full-sleeve combination, in particular to a drilling-type full-sleeve combination of a full-sleeve-length screw pile machine, which is suitable for drilling construction of a rock-entry type full-sleeve long-screw helical drilling pressure grouting pile. Background technique [0002] In recent years, with the continuous advancement of urbanization and the continuous development and application of new pile foundation construction technologies, construction projects such as high-rise buildings, railways, highways and bridges have higher and higher requirements for building foundations, and more and more piles The foundation should be constructed under the conditions of high groundwater level, complex geological conditions, extremely uneven in-situ properties of the soil, and extremely high strength of the rock mass. The construction technology of full-sleeve long helical drilled grouting piles developed in recent years has the ...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, the full-sleeve long screw pile driver is easy to collapse the hole when drilling in the thick miscellaneous fill and the soil layer with a high groundwater level, and the rear-inserted steel cage is easy to deviate, resulting in a large deviation in the thickness of the protective layer. Guarantee The rapid and accurate docking and stable operation of the full casing and the drilling process, as well as the improvement of the drilling performance of the cone drill tip at the front end of the full casing, have become the construction technology of the full casing long helical bored grouting pile in karst areas, high-rise and high-rise areas. It is an important factor for the expansion and application of pile foundation engineering in super high-rise buildings. Therefore, it is urgent to solve and study the rapid completion of the full casing connection, improve the stiffness of the full casing and the drilling performance, and ensure the stable operation of the long screw pile machine with full casing, strong drilling and excavation. Long service life, further improving the hole forming accuracy and construction efficiency of pile foundation

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