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（銅陵市建筑工程施工圖設計文件審查有限公司， 銅陵 244000）
［摘要］《建筑地基基礎設計規(guī)范》第5.2.7條軟弱下臥層驗算公式中的pc、pcz、Gk和fak都涉及到地面標高從哪里算起的問題，很多設計人員由于對該公式的推導未進行深入研究，不能正確選擇地面標高，設計要么浪費，要么不安全。本文通過對《建筑地基基礎設計規(guī)范》第5.2.7條軟弱下臥層驗算公式進行推導，提出計算pc、pcz、Gk和fak時地面標高的正確選擇方法，對廣大設計人員有一定的參考價值。
［關鍵詞］軟弱下臥層； 地面標高； 推導
中圖分類號： TU470 文獻標識碼： A文章編號： 1002-848X(2016)S1-0833-04
Correct use of the formula on the clause 5.2.7 of Code for design of building foundation
Li Guosheng
(Tongling Building Engineering Construction Drawing Design Document Review Co., Ltd., Tongling 244000, China)
Abstract: The pc, pcz, Gk and fak, in the formula of clause 5.2.7 of Code for design of building foundation all involve the issue of the ground elevation from where, Many designers have not conduct the thorough research on the derivation of the formula, thus unable to correctly choose the elevation of the ground,the design is waste or unsafe. Through to the derivation of the formula of clause 5.2.7 of Code for design of building foundation, a correct selection method of the ground elevation when calculating the pc, pcz, pk and fak was put forward, which has certain reference value for the vast number of designers.
Keywords: soft sublayer; ground elevation; derivation
作者簡介： 李國勝，學士，高級工程師，Email:693950802@qq.com。
