Simulation long board-peg work centrifugal model and test unit and method thereof

Abstract

The invention discloses a simulation long board-peg work centrifugal model and a test unit and a method thereof, wherein the centrifugal model comprises a box, a simulation roadbed and a simulation drain board, a polyvinyl chloride (PVC) tube is adopted to produce a cement mixing pile model, and the slurry is poured into the box for a plurality of times to produce the simulation roadbed; and woolen yarns are adopted as the simulation drain board, and the simulation drain board is vertically fed into a soil body to the designated depth of the soil body. The test unit utilizes a hydraulic jack to realize the dynamic grading loading of the centrifugal model test through a loading board, and various test data are measured by a measurement system. The invention can reasonably study the loading characteristics of the side sway modes of different soil bodies which are loaded by an axial load-bearing pile, can obtain the inner displacement mode of the soil body applying on the surface of the pile body, the limitation of the theoretical analysis is made up, and the key technology of simulating the long board-peg roadbed and the embankment load construction process is provided.

Description

technical field [0001] The invention belongs to the field of civil engineering, and relates to a centrifugal model for simulating a long slab-short pile construction method, a test device and a method thereof. Background technique [0002] Expressway is a large linear structure, which has strict requirements on post-construction settlement and settlement difference of different road sections. Expressways generally cross different landform units, and will encounter various foundation conditions along the line. Deep soft soil strata are widely developed in the Yangtze River Delta, Pearl River Delta and other coastal areas of my country. Due to the high embankment and heavy load, the reinforcement treatment of these deep soft soil foundations is one of the technical difficulties in the construction of roads or expressways in soft soil areas. For this reason, Ye Guanbao et al. proposed a combined treatment method using long plastic drainage boards and short cement-soil mixing p...

AI Technical Summary

Problems solved by technology

This construction method has achieved good processing results in engineering applications, but due to many uncertain factors in the field test, it is difficult to do in-depth research on its mechanical properties and reinforcement mechanism. In order to make up for the limitations of theoretical analysis, for important projects, it is necessary Analyze in conjunction with indoor model test (centrifugal model test), wherein the key technology is how to simulate long slab-short pile embankment, embankment load construction process, and the present invention aims to solve this key technology

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