Abstract: The practice of promoting the concept of green environmental protection is the goal of all walks of life. As a temporary project, the deep excavation engineering has considerable amount of waste of resources, especially in the urban center, the large use of concrete pile + concrete support beam, the occupation of the underground space and other leftover problems are complex, so it is more necessary to forge ahead in the direction of green environmental protection and conservation. The supporting structure of the uniform thickness soil-cement mixing wall with the insertion of hot-rolled steel beams has the advantages of the fast construction progress, the recyclable hot-rolled steel beams after the completion, cost saving and minimal leftover in the later stage, and no occupation of the underground space. It is a typical example of practicing the concept of green environmental protection and conservation; Like the traditional concrete pile, the supporting structure can be combined with the support and the ground anchor to form a variety of combined support structures, which can also be adopted according to local conditions in complex urban centers, and has certain popularization significance.

Key words: Deep Excavation, HotRolled Steel Beam Support, Uniform Thickness Cement Mixing Wall, End Curtain, Recyclable