Device and method for analyzing intensity of silica sol reinforced large-range sandy soil

Abstract

The invention discloses a device and a method for analyzing intensity of silica sol reinforced large-range sandy soil. The device comprises a vibration excitation system, an acceleration testing system and a soil static and dynamic testing system. The invention also discloses the method for analyzing the intensity of the silica sol reinforced large-range sandy soil. The method comprises the following steps: establishing a relation between soil intensity and dynamic modulus, then taking modulus of each unit in a finite element model as an optimization variable, taking actually measured and simulated accumulative errors on acceleration testing points as target functions, establishing an optimization model, and then optimally searching the modulus and the intensity of each soil unit. The device and the method are capable of assessing the reinforcement intensity of each local unit in the large-range reinforced sandy soil; the problem that the conventional method is incapable of detecting the sudden intensity change of reinforced soil samples between adjacent drilled holes can be solved; the number of reinforced soil samples obtained by drilling holes on the site can be effectively reduced; the cost of analysis of the reinforcement intensity of the large-range sandy soil can be reduced.

Description

technical field [0001] The invention belongs to the field of geotechnical engineering research, and in particular relates to a strength analysis device and method for reinforcing large-scale sandy soil with silica sol. Background technique [0002] Nano-silica sol is nano-silica particles. These nanoparticles first gradually condense into a chain structure and then form a three-dimensional network structure. This nano-gel system can reinforce loose sandy soil foundations. The reinforcement method is to infiltrate silica sol into saturated In a sandy soil foundation. In order to test the strength of the solidified sand, it is necessary to drill holes at different positions and take solidified sand samples at different depths for indoor triaxial tests to test the strength. When the reinforcement range is large, the cost of drilling samples is relatively high, and at the same time The strength of soil samples between adjacent boreholes can be obtained by interpolating the stre...

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Problems solved by technology

[0003] In order to overcome the problem that the prior art cannot detect sudden changes in the strength of solidified soil samples between adjacent boreholes, the present invention obtains the reinforcement strength of each local unit soil, and at the same time effectively reduces the number of solidified soil samples taken from drilled holes on site, saving a wide range of sand The analysis cost of soil solidification strength, the invention provides a kind of strength analysis device and method of silica sol reinforcement large-scale sandy soil

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