Multi-soaking condition simulation test model box and test method thereof

Abstract

The invention discloses a multi-soaking condition simulation test model box and a test method thereof. The multi-soaking condition simulation model box comprises a lidless cavity composed of a section steel frame and side plates, the bottom of the cavity is provided with a baseboard having soaking holes, a water storage box is formed between the baseboard and the cavity, a middle isolation plate is arranged in the water storage box, the sidewall of the water storage box is provided with a plurality of soaking holes, a baffle plate which forms a water storage tank together with the sidewall of the cavity is arranged outside the bottom of the cavity, the top of the cavity is provided with a support, the support is provided with a length-adjustable soaking tube, and the top of the cavity is provided with a plurality of detachable reaction beams and a jack. The multi-soaking condition simulation test model box has the advantages of clear structure, complete functions, strong repeated usage, realization of multiple groups of test of different soaking condition requirements, and good application prospect.

Description

technical field [0001] The invention belongs to the field of indoor tests of geotechnical engineering, and in particular relates to a model box and a test method for a simulation test of multiple flooding conditions. Background technique [0002] Collapsible loess strata are widely distributed in my country, and the impact of collapsibility must be considered when building buildings on collapsible loess sites. As a symbol of modern cities, subways have been built in many large and medium-sized cities, and many subway sections are inevitably built in collapsible loess areas. After the collapsible loess is immersed in water, its strength and bearing capacity will be reduced, which may have adverse effects on the superstructure. For example, in the subway tunnel in the collapsible loess area, when the tunnel base is flooded, it may cause uneven settlement of the base, resulting in damage to the tunnel structure. When the surface is immersed in water, the self-supporting capaci...

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Problems solved by technology

After the collapsible loess is immersed in water, its strength and bearing capacity will be reduced, which may have adverse effects on the superstructure. For example, in the subway tunnel in the collapsible loess area, when the tunnel base is flooded, it may cause uneven settlement of the base, resulting in damage to the tunnel structure. When the surface is immersed in water, the self-supporting capacity of the surrounding rock may be weakened for shallow subway tunnels, and the load acting on the tunnel lining will increase. The above two working conditions may eventually cause lining cracks and leakage. Serious threat to the operational security of the tunnel

At present, there have been many studies on the influence of loess collapsibility on superstructures, and the research methods are mostly numerical simulation methods (such as Zheng Jiajia et al., Analysis of the influence of surrounding rock immersion on the stability of loess subway tunnels, Journal of Railway Science, 2011) and centrifugal model test methods (such as Weng Xiaolin et al., Experimental Research on the Influence of Loess Soaking and Subsidence on Subway Tunnels, Chinese Journal of Geotechnical Engineering, 2016), but there are few studies on indoor model test methods. There are also few reports

This is because there is currently no suitable model box to carry out the impact of the system's flooding conditions on buildings in collapsible loess areas.

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