Drilling tool suitable for soft foundation man-hole digging

Abstract

The invention discloses a drilling tool suitable for soft foundation man-hole digging. The drilling tool comprises one drill bit, one drill bit connecting pipe, at least one additional pipe and one jacking pipe which are connected in sequence from bottom to top, the drill bit comprises a tubular main body, a drill bit spiral blade, and a hollow conical tip, a lug-shaped spiral opening is formed inthe upper end of the tubular main body of the drill bit, the drill bit connecting pipe comprises a tubular body and a drill bit connecting pipe spiral blade, the lower end of the tubular main body ofthe drill bit connecting pipe is connected with a necking down pipe and a convex nail I engaged with the lug-shaped spiral opening, an inverted-T opening I is formed in the upper end of the tubular main body of the drill bit connecting pipe, a necking down pipe and a convex nail II engaged with the inverted-T opening I are arranged on the lower end of the additional pipe, an inverted-T opening IIis formed in the upper end of the additional pipe, the lower end of the jacking pipe is provided with a necking down pipe and a convex nail III engaged with the inverted-T opening II, and the upper end of the jacking pipe is provided with a casing pipe vertically and fixedly connected with the jacking pipe. The embedding cost of a monitoring facility can be reduced, and the influence by the siteweak geological condition is small.

Description

technical field [0001] The invention belongs to the technical field of building construction measurement, and in particular relates to a drilling tool suitable for artificially leading holes in soft ground. Background technique [0002] Coastal and river tidal flats or dredging soft soil foundation treatment are common engineering projects at home and abroad. This kind of soft soil engineering has poor properties, high water content, high void ratio, and difficult treatment. Therefore, monitoring during the treatment process is very important. Indispensable, for example, groundwater level monitoring during treatment, pore water pressure monitoring, settlement monitoring, deep horizontal displacement monitoring, etc. The monitoring facilities involved include water level pipes, pore water pressure gauges, deep horizontal displacement inclinometer pipes, etc. [0003] At present, there is basically only one form for the method of embedding the above-mentioned monitoring facil...

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that a drilling rig needs to enter the site for each burial. If the number of single burying points is small, the cost of mobilizing the drilling rig, professional operators, and auxiliary personnel to enter the site is high, and the operation is complicated. It is greatly affected by the surface geological conditions of the site, and the surface soil quality When it is soft, the drilling rig cannot work, and if the ground is soft or sandy, the hole is easy to collapse, making it difficult to bury after the hole is formed

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