- 摘 要
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(1 上海建筑設(shè)計(jì)研究院有限公司 上海申元巖土工程有限公司, 上海 200011;2 同濟(jì)大學(xué)土木工程學(xué)院, 上海 200092)
摘要: 以陜西省延安市某黃土高填方地基工程為研究對(duì)象,分析了我國(guó)西北濕陷性黃土丘陵溝壑區(qū)域開(kāi)展挖填方工程面臨的關(guān)鍵技術(shù)問(wèn)題. 詳細(xì)介紹了工程的挖填方概況、工程地質(zhì)和水文地質(zhì)條件以及高填方地基設(shè)計(jì)和施工對(duì)策. 結(jié)合場(chǎng)地形成的過(guò)程,對(duì)施工期及工后沉降監(jiān)測(cè)數(shù)據(jù)進(jìn)行分析,得到了黃土高填方場(chǎng)地形成過(guò)程中不同階段地基沉降的特點(diǎn)和規(guī)律:填方區(qū)工后沉降量隨填土厚度的增大而增大,填土厚度相近區(qū)域,原地基覆蓋土層的厚度越大,工后沉降越大.
關(guān)鍵詞: 濕陷性黃土; 高填方地基; 場(chǎng)地形成; 分層強(qiáng)夯; 工后沉降
中圖分類號(hào):TU444 文獻(xiàn)標(biāo)志碼:A 文章編號(hào):1002-848X(2023)01-0121-08
DOI:10. 19701 / j. jzjg. SHY2322
Key technical problems and practice of high-fill foundation project in collapsible loess region
LIANG Yonghui1,2, HUANG Wei1, LIANG Zhirong1, LI Wei1
(1 Shanghai Shenyuan Geotechnical Engineering Co. , Ltd. , Shanghai Institute of Architectural Design & Research Co. , Ltd. ,Shanghai 200011, China; 2 School of Civil Engineering, Tongji University, Shanghai 200092, China)
Abstract: The key technical problems faced by the excavation and filling engineering in the collapsible loess hilly-gullyregions in northwest China were analyzed based on a loess high-fill foundation project in Yan′an, Shaanxi Province. Thegeneral situation of excavation and filling, engineering geology and hydrogeology conditions, as well as the design andconstruction countermeasures of high-fill foundation of the project were introduced in detail. Combined with the process of siteformation, monitoring data of the settlement during and after the construction were analyzed. The characteristics and laws offoundation settlement in different stages during the formation of loess high-fill site were obtained. The post-constructionsettlement of the filling area increases with the increase of the fill thickness. In the area with similar fill thickness, the greaterthe thickness of the original foundation covering soil layer, the greater the post-construction settlement.
Keywords:collapsible loess; high-fill foundation; site formation; layered dynamic consolidation; post construction settlement
∗上海市優(yōu)秀技術(shù)帶頭人計(jì)劃資助(22XD1432800),華建集團(tuán)技術(shù)帶頭人課題計(jì)劃,華建集團(tuán)科研基金項(xiàng)目(19-1 類-0216 地).
作者簡(jiǎn)介:梁永輝,博士,高級(jí)工程師,主要從事巖土工程地基處理與基礎(chǔ)工程等方面的科研和設(shè)計(jì)工作,Email: yonghui_liang@ arcplus. com. cn.
[引用本文] 梁永輝,黃瑋,梁志榮,等. 濕陷性黃土地區(qū)高填方地基工程關(guān)鍵技術(shù)問(wèn)題與實(shí)踐[ J]. 建筑結(jié)構(gòu),2023,53(1):121-128. LIANG Yonghui,HUANG Wei,LIANG Zhirong,et al. Key technical problems and practice of highfill foundation project in collapsible loess region[J]. Building Structure,2023,53(1):121-128.
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