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(天津市建筑設(shè)計(jì)院， 天津 300074）

［摘要］結(jié)合在建筑工程施工圖審查工作中遇到的一些地基基礎(chǔ)設(shè)計(jì)常見問題，對(duì)抗壓工況布樁時(shí)如何考慮有利地下水浮力作用、基礎(chǔ)設(shè)計(jì)時(shí)水浮力分項(xiàng)系數(shù)取值、軟土地基減沉復(fù)合疏樁基礎(chǔ)與常規(guī)樁基礎(chǔ)設(shè)計(jì)的異同點(diǎn)等進(jìn)行了簡要梳理。指出：基礎(chǔ)設(shè)計(jì)時(shí)，應(yīng)根據(jù)地下水對(duì)地下結(jié)構(gòu)的不利作用和有利作用，分別選取不同的設(shè)計(jì)水位；依據(jù)選擇的樁型及布樁方式區(qū)分常規(guī)樁基礎(chǔ)與減沉復(fù)合疏樁基礎(chǔ)并采取不同的設(shè)計(jì)方法。

［關(guān)鍵詞］地基基礎(chǔ)設(shè)計(jì)； 有利水浮力作用； 水浮力分項(xiàng)系數(shù)； 軟土地基； 減沉復(fù)合疏樁基礎(chǔ)

中圖分類號(hào)：TU4470KG2〗文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2019)07-0115-04

Hackling common problems in foundation design

Wang Junxia, He Limei

(Tianjin Architectural Design Institute, Tianjin 300074, China)

Abstract:Combined with the common problems of foundation design in the review of construction drawings of constructional engineering, some themes were mainly discussed, including how to consider favorable effect of groundwater buoyancy when laying piles under compressive condition, the value of partial coefficient of groundwater buoyancy in foundation design, and the similarities and differences of design between the composite sparse-pile foundation for reducing settlement of soft soil foundation and the conventional pile foundation. The results show that different design water levels should be selected according to their disadvantageous and beneficial effects on underground structure in the foundation design, and according to pile type and pile arrangement mode, composite sparse-pile foundation for reducing settlement and ordinary pile foundation were distinguished and different design methods were adopted.

Keywords:foundation design; favorable buoyancy; partial coefficient of buoyancy; soft soil foundation; composite sparse-pile foundation for reducing settlement