Simulation test box for freezing method construction

Abstract

The invention discloses a simulation test box for freezing method construction. The test box comprises grid frames, baffles and a reaction frame. The grid frames are connected by high-strength bolts to form a hexahedral frame; the baffles are embedded in the inner walls of the hexahedral frame; and a pipeline through hole is reserved in at least one baffle. The reaction frame is a quadrilateral frame; jacks are arranged at two adjacent sides of the inner frame of the reaction frame; a counter-force bar is arranged at another side; the jacks and the counter-force bar are connected with pressureplates through the baffles; and the fourth side of the reaction frame is abutted against one surface of the hexahedral frame. Freezing tubes are arranged in the inner cavity of the box body; and a seepage water pipe is embedded and a reversed filter layer is arranged at the baffle with a seepage water outlet. The test box has advantages: the influences on the formation temperature field, the displacement field, the water field and the soil and water pressure field by the whole process of the freezing method construction can be evaluated quantitatively under the multi-factor coupling effects of load, seepage and excavation disturbance and the like.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a simulation test box for freezing method construction. Background technique [0002] The freezing method construction technology originated in the 1860s. In 1862, the freezing method was first used in building foundation construction in South Wales, England. After more than a century of development, it gradually matured. my country introduced the freezing method construction technology in 1955 and established it in Kailuan. It was successfully applied in the Linxi wind shaft, and the freezing method technology has been gradually popularized since then. The freezing method is an effective means for mine vertical shafts, inclined shafts, and horizontal roadways to cross high water-rich strata. [0003] In recent years, with the acceleration of urbanization in our country, the contradiction between urban development and the shortage of urban land resources has ...

AI Technical Summary

Problems solved by technology

However, most of the current research results are qualitative descriptions of this problem, and it is difficult to quantify the distribution changes of the formation temperature field, displacement field, moisture field, and soil-water pressure field in the whole process of freezing method construction.

In order to solve the problem of construction quantification by freezing method, there are currently two solutions: one is field test, although the field test has high reliability and accurate data, but the test is expensive, time-consuming and laborious; It has developed rapidly in recent years, but the current technology is still immature. For example, the existing model test device only considers a single factor or a small number of factors, and it is difficult to simulate the whole process of freezing construction under multi-factor and complex working conditions on site.

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