Study on deformation characteristics of refuse landfill based on large-scale plate loading test
CHENG Yonghui，HU Shenggang，CHEN Hang
(Key Laboratory of Geotechnical Mechanics and Engineering of Ministry of Water Resources，Changjiang River Scientific Research Institute，Wuhan，Hubei 430010，China)
Abstract：In the exposition site of Wuhan Garden Expo，a 15 m-high soil mass was designed on a 12 m-thick refuse soil layer of Jinkou landfill. Large overburden load was bound to cause the settlement of whole refuse soil layer. In depth direction，the nature of the refuse soil varied greatly. Therefore，the result of small-scale load test cannot truly reflect the deformation characteristics of the whole refuse soil layer. In this paper，large-scale plate loading testes(6 m×6 m) were carried out. And the engineering performance of the refuse soil layers within the range of the main peak was studied. The development of the settlement under the plate，surface settlement，stratified settlement and horizontal displacement around the plate were monitored and analyzed during loading. Based on these statistics，the overall deformation characteristics and load-bearing failure mode of the refuse soil layer were obtained. The test results showed that the P-S curve of the refuse soil layer under overburden load contained three stages including elastic，elastic-plastic and failure stage. The deformation modulus was 5.66–6.77 MPa，and the ultimate bearing capacity was about 300 kPa. The influence range of settlement deformation run through the whole layer. The final failure mode was punching failure mode.
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2020, Vol. 39 
