Exploration method for rockfill and gravelly soil site

Abstract

The invention discloses an exploration method for a rock-filled and gravelly soil site. Comprising the following steps: preparation: material preparation, personnel preparation and machine preparation all meet exploration requirements; drilling exploration: if the overlying stratum is a large-particle-size hard rock skeleton stratum; selecting an exploration hole site, and drilling an exploration hole in the surface layer of the ground by adopting impact rotary drilling equipment from the surface layer of the ground; meanwhile, the casing pipe is followed; underlying stratum exploration: adopting rotary drilling equipment to penetrate into the casing pipe, continuously performing coring drilling, in-situ testing and sampling on the underlying stratum as a sample, and performing engineering geophysical prospecting test: arranging a geophysical prospecting test exploration line, performing engineering geophysical prospecting tests such as a high-density electrical method and the like, and engineering machinery excavation: finding out and recording material components of the large-particle-size hard rock skeleton stratum and the stratum above the large-particle-size hard rock skeleton stratum. And the various recording results are integrated to form final stratum information of the target site, so that the collapse condition during exploration of a rock stratum with an unstable skeleton is reduced, and the aims of shortening the construction period, reducing the cost and improving the efficiency are achieved.

Description

technical field [0001] The present application relates to the field of geotechnical engineering exploration, in particular to an exploration method for rock filling and gravel soil sites. Background technique [0002] The geological conditions of the project construction site are complex and changeable, and there are often deep boulders, boulders, large-sized pebbles, crushed gravel soil and rock filling sites, and the rock and soil layers are mostly rocks with different particle sizes. Medium-slightly weathered rock and other hard rocks are used as the skeleton, and sand, silt, cohesive soil or mixed soil is used as the filling. [0003] Due to the large thickness of the above-mentioned rock and soil layer, it is extremely difficult and costly for foundation piles to pass through this layer. Most engineering construction will try to use it as the foundation of the project through relevant foundation treatment technologies on the premise of finding out the current stratum di...

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Problems solved by technology

[0004] In view of the above-mentioned related technologies, the inventor believes that the hard rock skeleton particles of the above-mentioned rock-soil layer are uneven in density, even partially discontinuous, and are easily disturbed during the survey and construction process, and the skeletons are prone to misalignment, and the texture is hard , lead to drilling difficulties, drill stuck accidents, due to the loss of fillers between the skeletons during drilling and construction, accidents such as water leakage, slurry leakage, hole collapse, stuck drill and buried drill are prone to occur

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