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为有效加固铁路软弱基床,保证列车安全运营,运用Marc软件对土工格室加固基床的工程性状开展了有限元分析,分别选择34cm×10cm、40cm×10cm、34cm×15cm和40cm×15cm(焊距×高度)4种规格的土工格室,应用平板载荷试验方法进行了土工格室加固的软弱基床承载力足尺模型试验,同时采用土工格室加固方法,对阳安铁路K241+450～550段的软弱基床进行了处治。结果表明土工格室可有效约束软弱基床的侧向位移和扩散应力,最大侧向位移可减少17%,最大竖向应力减少9.3%,且使应力分布更加均匀;加固后的基床承载力达180kPa以上,降低加固费用6%～12%;加固地段6a累计最大沉降为28mm,最小沉降为13mm,达到了加固铁路软弱基床的目的。
In order to effectively reinforce the railway weak foundation bed and ensure the safe operation of the train, the finite element analysis of the engineering properties of the geocell reinforced bed was carried out by using the Marc software. 34cm × 10cm, 40cm × 10cm, 34cm × 15cm and 40cm × 15cm Welding distance × height) of four kinds of geocell, the application of plate load test method of geocell reinforcement of weak foundation bed full-scale model test, at the same time using geocell reinforcement method, Yang’an Railway K241 + 450 ~ 550 section of the weak bed for treatment. The results show that geocell can effectively control the lateral displacement and diffusion stress of the weak bed, the maximum lateral displacement can be reduced by 17%, the maximum vertical stress can be reduced by 9.3%, and the stress distribution can be more uniform. The reinforced bed load-bearing capacity Up to 180kPa, reducing the cost of reinforcement by 6% ~ 12%. The accumulated maximum settlement of the reinforced section 6a is 28mm and the minimum settlement is 13mm, which achieves the purpose of strengthening the weak bed of the railway.