结合工程实例，介绍了进口端位于浅埋、沟槽软土等不良地质隧道的工程实践。
Combined with engineering example, the construction practice of tunneling is introduced for the tunnel whose entrance stand at harmful geologic conditions of shallow cover and groove with soft soil.
隧道穿越不良地质段施工技术的研究。
Do research on tunnel passing through bad geological section.
岩溶是地下水地质作用的过程和结果，是隧道建设面临的不良地质现象之一。
Karst is a process and result of groundwater geologic function and it is one of bad geological phenomenon facing tunnel construction.
隧道穿越不良地质有：高压力水、煤层、采空区、瓦斯、岩溶、断层等。
The poor geological conditions that the tunnel confronts include high-pressure water, coal seam, goaf, gas, Karst and fault.
实践表明，采用钻孔雷达和BEAM电法探测技术对隧道掌子面前方的不良地质情况，尤其是含水情况具有较好的预测结果。
The practice demonstrates that the prediction to adverse geologic condition in front of the heading face by boring radar and BEAM electric method, especially to water-holding condition, is satisfied.
通过两种方法的研究来更好的对隧道不良地质进行预报。
Through the study of the two methods to forecast adverse geological condition in tunnel.
五龙岭隧道由于其特殊的地形地质情况，使该隧道具有大跨、浅埋、软弱不良地质和偏压等四大难点。
Wulongling tunnel on the Jingzhu Expressway is a dual-arch highway tunnel with a large span, shallow depth, poor geology and uneven ground pressure.
对上海崇明越江隧道工程沿线的工程地质和水文地质条件进行概略总结，并对场地内的不良地质及其对策进行了分析评价。
The paper summarizes the engineering geologic and hydrogeologic condition along the Shanghai Chongming Tunnel and analyses the unfavorable geological condition and its solution in the site.
超前小导管注浆加钢支撑是隧道工程辅助开挖的一种施工工艺，特别适用于地质条件不良的隧道施工。
The pump pouring liquid with the supporting of steel by a small pipe is one of the add craft in tunnel construction and it is fit for tunnel project in bad geology condition.
在软弱松散或不良地质地层中以及在城市地铁中修建隧道时，为了能够有效地限制地面沉陷，并全面地保持地层处于稳定状态，需要对地层进行超前预支护加固。
In order to limit the sink of surface and maintain the stratum stable, it's necessary to do pre-support and consolidation, when tunnels would be constructed in soft or weak geology stratum.
对不良地质段隧道开挖灾害防治有一定的借鉴意义。
It is believed that the research has reference to the prevention for disasters in tunnel construction under poor geological condition.
通过对实例验证结果表明，应用瞬变电磁法进行隧道水体不良地质体超前地质预报是有效的。
The results from practice show that the said method is effective to the advanced geologic forecasting of the unfavorable geological bodies filled with water.
最后指出海底隧道穿越不良地质段的施工技术要点和紧急预案。
Finally, construction techniques that are used for tunnel passing through unfavorable geology bodies are indicated.
浅埋偏压段隧道不良地质条件给施工造成安全隐患，也是决定整条隧道施工成败的关键。
Poor geological conditions of shallow buried and unsymmetrical loaded section caused potential safety problems on construction, which is critical to the success of tunnel construction.
系统分析注浆加固圈厚度对地层沉降的影响关系，并据此提出海底隧道不良地质段的地层加固范围；
The relation between the thickness of grouting circle and strata settlement is also given to determine the optimal grouting circle thickness for unfavorable geologic bodies.
研究结果表明：连拱隧道内侧断裂带、上方松散层等不良地质条件和不合理的施工方案是导致隧道衬砌严重破坏和山体地表开裂的主要原因。
The research results indicate that the top inclined fault and the loose rock strata and the unreasonable construction project are the main causes to induce these defects.
研究结果表明：连拱隧道内侧断裂带、上方松散层等不良地质条件和不合理的施工方案是导致隧道衬砌严重破坏和山体地表开裂的主要原因。
The research results indicate that the top inclined fault and the loose rock strata and the unreasonable construction project are the main causes to induce these defects.
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