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    黃昌乾¹，李國強(qiáng)²，潘啟輝¹
    （1 中航勘察設(shè)計(jì)研究院，北京100098；2 北京市建筑設(shè)計(jì)研究院，北京100045）

[摘要] 根據(jù)基床系數(shù)的基本概念和工程意義，指出了基床系數(shù)測(cè)試方法、取值方法以及尺寸修正等方面存在的一些問題，指出應(yīng)采用確定地基承載力的載荷試驗(yàn)方法測(cè)試基準(zhǔn)基床系數(shù)，以及基床系數(shù)與路基系數(shù)之間在工程意義上的本質(zhì)差別。提出進(jìn)行基礎(chǔ)結(jié)構(gòu)設(shè)計(jì)時(shí)，應(yīng)采用沉降觀測(cè)結(jié)果得到的經(jīng)驗(yàn)值或通過變形計(jì)算確定基床系數(shù)，特別是采用復(fù)合地基時(shí)必須采用這種辦法。給出了北京地區(qū)幾個(gè)典型復(fù)合地基工程基床系數(shù)的實(shí)測(cè)值。
[關(guān)鍵詞] 基床系數(shù)；載荷試驗(yàn)；復(fù)合地基

    Analysis on obtaining methods about the coefficient of subgrade reaction
    Huang Changqian¹,  LiGuoqiang²,  Pan Qihui¹
    (1Geotechnical Institute of China Aviation Industry, Beijing 100098, China; 2 Beijing Institute ofArchitecture Design, Beijing 100045, China)

Abstract: According to the concept and engineering meanings of the coefficient of subgrade reaction, some questions about the test methods, obtaining methods and amend methods of size were put forward, and it pointed out that the test method of norm coefficient of subgrade reaction should be load test as the test method of subgrade bearing capacity, the intrinsical differences between the coefficient of subgrade reaction of the construction subgrade and the road were also presented. It was pointed out that the results of settlement observation or settlement calculation should be used to obtain the coefficient of subgrade reaction to design the foundation structure, it is necessary to take the method when the composite foundation is adopted. Some in-situ surveyed results of the coefficient of subgrade reaction of composite foundation in Beijing were figureed out.
Keywords: coefficient of subgrade reaction; load test; composite subgrade