Cement soil in-situ sampling device and sampling method using the same

Abstract

The present invention provides a cement soil in-situ sampling device and a sampling method using the same. The cement soil in-situ sampling device includes a sampling container and a sampling structure, which are fixedly installed on a cutting device of the underground construction equipment. when the cutting device moves downwards in the formation, a pressure plate of the sampling structure abuts against an upper limit plate of the sampling structure by the upward pressure of the cement soil, and at least one group of links of the sampling structure press a cover plate of the sampling container, such that the cover plate is always in the closed state before the cutting device moves downwards to a predetermined depth, thereby avoiding mixing of the cement soil in the non-detection depth into the sampling container. When the cutting device moves upwards in the formation, the pressure plate is driven by the downward pressure of cement soil to rotate downwards and drive at least one group of links to move, so as to automatically open the cover plate; and the soil cement in the detection depth enters and fills the sampling container to complete the cement soil sampling, thereby improving the detection accuracy of the cement soil parameters.

Description

technical field [0001] The invention relates to the field of construction machinery, in particular to a cement soil in-situ sampling device and a sampling method for underground construction. Background technique [0002] The continuous wall construction method under equal thickness cement soil (TRD construction method, Trench cutting Re-mixing Deep wall method), developed by Japan in the early 1990s, is a complete set of equipment and construction that can continuously form walls in various soil layers and sand and gravel layers. method. The basic principle of the TRD construction method is to use a chainsaw-type cutting box to insert vertically into the ground, and then move horizontally and laterally. At the same time, the chain drives the cutter to make a rotary motion up and down, mix the original soil and pour cement slurry to form a wall with a certain thickness. To replace the currently commonly used high-pressure jet grouting, columnar underground diaphragm walls c...

AI Technical Summary

Problems solved by technology

[0004] However, the cost of core sampling by drilling is high and the workload is heavy; and the sampling by digging soil cannot truly reflect the parameters of each layer of cement soil

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