Dry operation cast-in-situ bored pile hole bottom sediment soil sampling device

Abstract

The invention discloses a dry operation cast-in-situ bored pile hole bottom sediment soil sampling device. The dry operation cast-in-situ bored pile hole bottom sediment soil sampling device comprises a soil sampling barrel, the top end of the soil sampling barrel is connected with a cross-shaped top plate, the center of the top end of the cross-shaped top plate is connected with a lifting rope, the outer wall of the tail end of the soil sampling barrel is hinged to a plurality of vertically-arranged arc-shaped steel plates, the tail ends of the arc-shaped steel plates are tip ends, the inner walls of the arc-shaped steel plates are connected with the inner wall of the soil sampling barrel through springs, the arc-shaped steel plates are folded to form a hemisphere, the center of the lower end face of the cross-shaped top plate is vertically connected with a lifting rope, the tail end of the lifting rope is connected with the center of an annular connecting piece, a plurality of horizontally-arranged transverse supporting rods are fixed to the outer ring of the annular connecting piece, and the end parts of the horizontally-arranged transverse supporting rods are inserted into transverse grooves formed in the inner sides of the arc-shaped steel plates, so that the plurality of arc-shaped steel plates are opened. The soil sampling device is reliable in structure, convenient to apply, low in cost, small in size, environmentally friendly, safe, easy to operate and rapid in soil sampling, and hole bottom sediment cleaning work can be effectively completed under complex conditions; and wide application market and development prospects are realized.

Description

technical field [0001] The invention relates to the technical field of hole bottom sediment cleaning in geotechnical engineering, in particular to a device for extracting soil from the bottom of bored pile holes in dry operation. Background technique [0002] Bored piles are widely used in industrial and civil buildings, roads, railways and other industries because of their large bearing capacity. One of the key links to control the quality of bored piles is to control the thickness of the sediment at the bottom of the hole. If the test results exceed the specification requirements, the sediment at the bottom of the hole must be cleaned. The existing technology mainly relies on mud or high-pressure gas to take out the bottom sediment in different ways. This technology can better solve the bottom sediment in the hole formed by the mud by the wall protection process. [0003] For bored piles in dry operation, there is no special equipment for cleaning sediment at the bottom ...

AI Technical Summary

Problems solved by technology

[0004] 1. Dry operation drilling cannot use the mud circulation process to bring out the bottom sediment;

[0005] 2. The sediment at the bottom of the hole is relatively loose, and it is very likely to collapse while clearing;

[0006] 3. The construction site is narrow and the time is tight, so there is no condition for using large-scale equipment;

[0007] 4. The space in the borehole becomes smaller (compared to before the reinforcement cage is placed), which further limits the use conditions of the slag cleaning equipment

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