884aa四虎影成人精品,99久久国产综合精品女图图等你,97在线观看永久免费视频,久久精品国产精品亚洲38,ⅵdeodesetv性欧美

(1 廣州市設(shè)計(jì)院， 廣州 510620; 2 廣州大學(xué)土木工程學(xué)院， 廣州 510006)

［摘要］不同地區(qū)的基坑規(guī)范對(duì)于計(jì)算基坑多支點(diǎn)支護(hù)結(jié)構(gòu)抗傾覆性的規(guī)定有一定差異，這導(dǎo)致了采用不同基坑規(guī)范設(shè)計(jì)基坑需要的支護(hù)結(jié)構(gòu)嵌固深度不相同。選取了《建筑基坑支護(hù)技術(shù)規(guī)程》（JGJ 120—2012）、上海市《基坑工程技術(shù)標(biāo)準(zhǔn)》（DG/TJ 08-61—2018）、廣東省《建筑基坑工程技術(shù)規(guī)程》（DBJ\\T 15-20—2016）三本基坑規(guī)范，分析了三本規(guī)范對(duì)于基坑抗傾覆穩(wěn)定計(jì)算規(guī)定的不同之處，并結(jié)合具體案例，比較了這些不同之處對(duì)于支護(hù)結(jié)構(gòu)嵌固深度的影響。結(jié)果表明，采用不同規(guī)范進(jìn)行深基坑多支點(diǎn)支護(hù)結(jié)構(gòu)設(shè)計(jì)時(shí)，支護(hù)結(jié)構(gòu)的嵌固深度差異可達(dá)數(shù)米，這對(duì)基坑工程的經(jīng)濟(jì)性影響不可忽視；基坑所在的土層力學(xué)性質(zhì)越差或基坑深度越大，支護(hù)結(jié)構(gòu)嵌固深度差異越大。

［關(guān)鍵詞］深基坑；多支點(diǎn)支護(hù)結(jié)構(gòu)；抗傾覆計(jì)算；規(guī)范比較；支護(hù)結(jié)構(gòu)嵌固深度

中圖分類號(hào)：TU398-7文獻(xiàn)標(biāo)識(shí)碼：A文章編號(hào)：1002-848X(2021)10-0123-05

Discussion on anti-overturning calculation of multi-support retaining structure in deep foundation pit

HUANG Junguang1, RUAN Fei1, LI Jianjin1, LI Lei1,2

(1 Guangzhou Design Institute, Guangzhou 510620, China; 2 School of Civil Engineering, Guangzhou University, Guangzhou 510006, China)

Abstract:There are some differences in the specifications of different areas for calculating the overturning resistance of multi-support structure in foundation pit, which results in different embedded depth of support structure required for foundation pit design by different foundation pit specifications. Technical specification for retaining and protection of building foundation excavations (JGJ 120—2012), Technical Code for Excavation Engineering in Shanghai (DG/TJ 08-61—2018), Technical Specification for Building Foundation Excavation in Guangdong Province (DBJ\\T15-20—2016)) were selected. The differences of the three specifications for  anti-overturning  stability calculation of foundation pit were analyzed and their effects on embedded depth of support structure were compared by combining specific cases. The results show that when different specifications are used to design multi-support retaining structure in deep foundation pit, the difference of embedded depth of support structure can reach several meters, which has an important economic impact on foundation pit engineering. The poorer the mechanical properties of the soil layer where the foundation pit is located or the deeper the foundation pit is, the greater the difference of embedded depth of support structure is.

Keywords:deep foundation pit;multi-support retaining structure; anti-overturning calculation;comparison of specifications;embedded depth of support structure

作者簡(jiǎn)介：黃俊光，碩士，教授級(jí)高級(jí)工程師，Email: huangjunguang@gzdi.com。