Abstract
To mitigate carbon emissions during the construction of deep foundation pit support in undulating strata, a theoretical calculation approach was utilized to design and compute the foundation pit support for Qingdao’s Metro Line 4. On this basis, the numerical simulation method is used to optimize the design scheme of foundation pit support with the surface deformation and the stress of the support structure. The results of numerical simulation show that the final ground settlement is 5.26 mm, the maximum horizontal displacement is 0.2836 mm, and the corresponding maximum shear force of the retaining pile is 250 kN, which is obviously superior to the ground settlement of 55 mm, 33 mm, and 1341.03 kN in the theoretical design. The use of simulation software before the construction and support of deep foundation pit excavation can reduce resource waste and achieve low-carbon design while ensuring construction safety.
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