Due to the weak surrounding rock, high ground stress. easy collapse and big deformation, the construction of tunnels with mudstone were very difficult.
泥岩隧道围岩软弱，地应力强烈，易坍塌大变形，修建困难。
The 346km long section from Ji'an to Guangdong boundary on Beijing-Jiulong Railway Line is in the cindition of weak ground soil and abundant rainfall, the construction is very difficult.
京九铁路赣南吉安至赣粤省界段地质不良，降雨量多，工程艰巨，加之设计方案定得晚，开工滞后，因此工期紧张的矛盾十分突出。
The 346km long section from Ji'an to Guangdong boundary on Beijing-Jiulong Railway Line is in the cindition of weak ground soil and abundant rainfall, the construction is very difficult.
京九铁路赣南吉安至赣粤省界段地质不良，降雨量多，工程艰巨，加之设计方案定得晚，开工滞后，因此工期紧张的矛盾十分突出。
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