TGP超前地质预报方法在马口排隧道的应用研究

TGP Geological Prediction Method Research and Application in Makoupai Tunnel

TGP产前地质预报法由于其灵敏性好,探测误差小,检波器与围岩耦合性好,预报距离长等优点,在隧道超前预报中得到广泛应用。以广东省龙怀高速TJ26标马口排隧道为工程背景,研究了TGP超前预报原理、预报原则,通过对同侧、对侧的地震波三分量特点进行预报分析,通过分析地震波波速、偏移成果图以及结构产状,得出结论 :预报范围内节理裂隙较发育,岩体较破碎,地下水发育,可能存在溶隙,经实际开挖检验,预报结论正确,这对于保证施工安全起到重要作用。

Because of its good sensitivity, small detection error, good coupling between the detector and the surrounding rock and long prediction distance, the TGP pre geological prediction method has been widely used in the prediction of the tunnel. In Guangdong Province, Longhuai high-speed TJ26 standard tin drainage tunnel as the project background, studied the TGP prediction principle, principle of forecast, the forecast analysis on the same side, on the side of the three component seismic wave characteristics, through the analysis of the seismic wave velocity, and the occurrence of migration map structure, draw the conclusion： the forecast range of joint the fissure is developed, the broken rock, groundwater, karst gap may exist, the actual excavation forecast test, the conclusion is correct, this to ensure the safety of construction plays an important role.