盾构施工壁后同步注浆对隧道管片的影响分析

以厦门市轨道交通一号线集美中心站-诚毅广场站区间隧道为依托工程，利用数值模拟的方法，设置了9个工况研究不同注浆参数对盾构隧道管片受力的影响。结果表明:管片所受到的最大压应力值远小于混凝土的极限抗压强度，但随着注浆浆液重度或注浆层厚度的增加，管片所受到的最大拉应力值可能达到或超过混凝土的极限抗拉强度，从而导致管片发生破坏。

Analysis on the Influence of Back-filled Synchronous Grouting for Shield Construction to Tunnel Segments

This paper researches the influence of different grouting parameters to the stress of shield tunnel segments under 9 operating conditions by using numerical simulation method based on the tunnel from Jimei central station to Chengyi square station of Xiamen metro line 1. The results show that the maximum crushing stress of the segments is far less than the ultimate compressive strength of the concrete, but with the increase of grout density and the thickness of grouting layer, the maximum tension stress of the segments may reach or exceed the ultimate tensile strength of the concrete, resulting in the damage of segments.