Study on the Initial Support Technology of Tunnel Surrounding Rock in Soft Soil
Soft ground layer usually has low bearing capacity and high compressibility,collapse and deformation are very easy to occur during tunnel excavation.In order to effectively control the deformation damage of the surrounding rock and ensure the construction safety,the initial support technology for the surrounding rock of the tunnel in soft ground layer in zones is proposed.Pressure data are collected by reasonably planning the peripheral rock pressure monitoring points;Construct the initial support intrinsic model by using the simplified anchor rods,steel frame and rock structure surface;Calculate the optimal spacing and length of anchor rods and steel frames,and design the composite support structure based on them to realise the initial support in the surrounding rock zones.The results show that the proposed method of tunnel settlement displacement is small,and the distribution area of plastic zone is small.It reflects the effectiveness of the support technology and has good application value.
tunnel in soft soil stratuminitial supportsurrounding rock pressurebolt stresssteel frame stress
万方数据
维普
