Testing apparatus for preparing large-diameter remolded soft clay sample

Abstract

The invention discloses a testing apparatus for preparing a large-diameter remolded soft clay sample. The testing apparatus comprises a main bracket, wherein a support platform is arranged on the main bracket; a filter-press container is arranged on the support platform; a filter device and a filter water collection device are arranged at the bottom of the filter-press container; a bearing plate is arranged above the filter-press container; the bearing plate is aligned with the filter-press container and is fixed on a pressing bracket; the pressing bracket comprises a vertical rod which runs through a through hole on the support platform and extends downwards; a bearing rod is arranged at the lower end of the vertical rod; at least two lug plates are fixed at the lower end of the support platform; levers are connected on the lug plates in a swinging manner; weight racks are arranged at the front ends of the levers; balancing weights are sleeved at the back ends of the levers; and the levers are erected on the bearing rod. The testing apparatus disclosed by the invention is simple and reasonable in structure and convenient to operate, an is applicable to a model test of strengthening a soft foundation through combination of indoor vacuum preloading method and electro-osmosis method; and bending condition of a plastic drainage plate as well as change rules of vacuum degree and pore water pressure in soil in a soil consolidation process can be reflected more visually.

Description

technical field [0001] The invention relates to a test device for preparing a large-diameter remolded soft clay sample, in particular to a test device for preparing a remolded sample by a mud pressurized consolidation method. Background technique [0002] Soils used in geotechnical tests are mainly divided into undisturbed soil, disturbed soil and remolded soil. Among them, the undisturbed soil is obtained from a certain depth by using methods such as thin-walled or thick-walled pipes or freezing, and the soil body will inevitably be disturbed during the soil-extracting process, so it is very difficult to obtain the real undisturbed soil . In the actual process of soil extraction, the soil obtained is disturbed. In addition, the spatial variability of the foundation soil is large, and it is difficult to ensure the number and uniformity of the obtained samples. Therefore, when it is difficult to obtain the original sample and it is necessary to systematically discuss the st...

AI Technical Summary

Problems solved by technology

At present, there is no standard practice in the method of mud pressurization and consolidation. Some instruments are too small to obtain relatively large remodeling samples; some instruments drain too slowly, and it takes too long to make a sample. ; Some instruments have limited loads and cannot apply large loads, and research on over-consolidation has been carried out; some instruments have unreasonable drainage, and the remodeled samples obtained are not uniform enough, resulting in partial hard and partial soft results

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