Issues regarding the compaction coefficient λ and the characteristic bearing capacity value fak of the foundation soil after replacement
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This post was last edited by xlm19589 on 2011-8-30 at 13:54. Basic civil engineering issues: In accordance with the requirements of civil engineering design, after compacting each foundation bearing stratum, it is necessary that the compaction coefficient λ and the characteristic bearing capacity value fak of the soil after replacement meet the design specifications. Therefore, during on-site civil engineering construction, it is essential to measure the compaction coefficient λ and the characteristic bearing capacity value fak of the soil after replacement! Here comes the question: During construction, is it possible to only determine the compaction coefficient, without determining the characteristic bearing capacity value fak of the foundation soil after replacement?
No, the compaction coefficient must meet the required standards in order to ensure the bearing capacity of the filled soil foundation. The characteristic value of foundation bearing capacity is an important basis for foundation design; without it, design is not possible.
Explanatory note to Article 4.2.3 of JGJ79-2002: The bearing capacity of a foundation that has been treated by soil replacement should be determined through tests, particularly in-situ tests; specific testing methods vary depending on the type of material used. Only buildings with a safety rating of level 3 and similar can use the values in Table 1. The meaning of the second half is: select from Table 1 based on the material, the compaction coefficient λ, and the corresponding process. (At this point, only the determination of the compaction coefficient λ is required.)