Application And Analysis Of Technique Of Bolting And Shotcreting Support In Deep Foundation Ditch

Along with the increase of high-rising buildings, development of urban facilities and development and utilization of the underground space, the deep foundation ditch support has been the hotspot of the foundation engineering in recent years. The application of the bolting and shotcreting support has been more and more extensive because it can not only guarantee the stability of the foundation ditch but also meet the requirement for the deformation of the foundation ditch, additionally it can produce huge economic benefit.Combining the basic characteristic of the rock and soil in Chengdu city, a few problems with practical significance in theory and practical engineering on the bolting and shotcreting support of deep foundation ditch are analyzed and studied in this paper. The main research work is as follows:1. The structural analysis of the anchor rod is carried out with analytic approach and the shear stress distribution of the interface of the anchor-section of tensioned and compressed anchor rod under elastic stage is given. The shear stress distribution of anchor-section in the interface of rock and soil is uneven. The peak point of the shear stress is near the end of the anchor-section with load applied, and the shear stress decreases gradually with increment of the underground depth of anchor rod and reaches to zeros finally.2. The elastic-plastic finite element and computational analysis model of the...