Classification of Surrounding Rock and Support Force Determination of Ice Water Accumulation Tunnel

To quantitatively evaluate the surrounding rock parameters of ice water accumulation body, a rapid classification method of surrounding rock of ice water accumulation body was proposed, and the deformation control standard of ice water accumulation body was given, which mainly includes the following contents: (1) the surrounding rock was classified in the design stage according to the relevant calculation methods of specifications, combined with the relevant foreign specifications and the basic characteristics and geomorphic characteristics of ice water accumulation body. (2) According to the dense state of soil, fine particle content and fine particle water content, the surrounding rock in the construction stage was classified. The river ice water accumulation body was divided into three basic grades and four sub grades. (3) According to the cementation between groundwater and surrounding rock, the surrounding rock classification was put forward. (4) Based on the classification of surrounding rock of ice water accumulation tunnel, the characteristic curves of surrounding rock and the allowable deformation of tunnel under different surrounding rock grades were calculated, and the determination method of tunnel support force based on the allowable deformation was proposed. The research results can provide a new reference for the classification of surrounding rock and the support force determination of ice water accumulation tunnel.