角斗士
发表于 2025-3-23 13:29:45
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MULTI
发表于 2025-3-23 15:17:23
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粗鄙的人
发表于 2025-3-23 21:09:04
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人造
发表于 2025-3-24 01:20:45
https://doi.org/10.1057/9781137444158echanism of underground structures is different from that of the structures on the ground or in the air. Underground structures are buried underground and their loads come from the stratum itself. The strata pressure acting on the underground structures is complex, which is related to many factors,
Arb853
发表于 2025-3-24 05:25:11
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召集
发表于 2025-3-24 07:59:55
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FLING
发表于 2025-3-24 11:39:42
Social Networking Media: Use by Field PostsThe earth which human beings live on is a sphere of crust and deep mantle and core. The crust is a thick lithosphere with surface of weathered rocks and different thickness soil. Both rock and soil layers are entities in a natural state.
狂热语言
发表于 2025-3-24 17:09:36
Traditional Information ChannelsThe elastic foundation beam is a beam placed on a certain elastic foundation and each point of the beam closely linked to the foundation, such as railway sleepers, reinforced concrete strip foundation beams, etc.
栖息地
发表于 2025-3-24 22:57:47
Traditional Information ChannelsThe construction of early underground engineering was based on the experience. In the early 19th century, the calculation theory was gradually formed, which was used to guide the design and the construction of the underground structures.
elastic
发表于 2025-3-25 01:28:21
Social Networking Media: Use by Field PostsWith the rapid development of transportation industry and the continuous advancement of urbanization in China, the underground structure engineering has been widely used in the fields of roads, railways, and municipal construction.