Pre-supporting Technology of Horizontal Jet Grouting Pile in Aeolian Sand Layer
Based on the pre-support of horizontal jet grouting pile in #1 Shenmu Tunnel of Yulin—Shenmu High Speed Railway,the causes of instability in aeolian sand layer are expounded,and the mechanism,engineering characteristics,construction technology and key technologies of horizontal jet grouting pile are introduced.The arch shell formed by horizontal jet grouting can effectively solve the problems of quicksand,sand leakage,face instability and large deformation around the tunnel caused by tunnel construction in the aeolian sand layer.Under the reasonable parameters of jet grouting,the safe and reliable pre-support can be realized at a lower engineering cost to ensure the safety of tunnel construction.
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