- 摘 要
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(1 蘭州有色冶金設計研究有限公司， 蘭州 730000； 2 甘肅土木工程科學研究院， 蘭州 730022)
［摘要］在蘭州市榆中縣和平鎮(zhèn)38～42m厚自重濕陷性黃土場地上，做直徑20m圓形試坑的現(xiàn)場浸水試驗，試驗持時69d，其中浸水觀測62d、停水后觀測7d，總用水量4 346m3。重點考察了濕陷性黃土的濕陷范圍、濕陷速率變化規(guī)律及裂縫發(fā)展規(guī)律。試驗結果表明，濕陷性黃土的濕陷有一定范圍，15m以下沉降量較小，滲透最大影響深度約為25m，且大厚度自重濕陷性黃土濕陷范圍呈先局部后整體，先近后遠，近密遠疏，逐步擴展的變化規(guī)律。
［關鍵詞］自重濕陷性黃土；浸水試驗；濕陷范圍；沉降量
中圖分類號：TU413-4 文獻標識碼：A文章編號：1002-848X(2021)15-0131-04
Water immersion test study on collapsible range of strong self-weight collapsible loess
CHEN Tianlei1, LI Xudong1, LU Haitao2, CAI Mingxi1
(1 Lanzhou Engineering & Research Institute of Nonferrous Metallurgy Co., Ltd., Lanzhou 730000， China；2 Gansu Civil Engineering Research Institute Co., Ltd., Lanzhou 730022， China)
Abstract: On-site water immersion test of a 20m diameter test pit was carried out on a 38~42m thick self-weight collapsible loess site in Heping town, Yuzhong county, Lanzhou city. The test lasted for 69 days, including 62 days of immersion observation and 7 days of observation after water stoppage. The total water consumption is 4 346m3. The collapsible range of collapsible loess, the variation law of collapsible rate and the law of crack development were mainly investigated. The experimental results show that the collapsible loess has a certain collapsible range, the subsidence is small below 15m, and the maximum penetration depth is about 25m. The collapsible range of large-thickness self-weight collapsible loess shows a changing law of local first and then the whole, near first and then far, near dense and far sparse, and gradually expanding.
Keywords:self-weight collapsible loess； water immersion test； collapsible range； subsidence
*甘肅省科技計劃資助項目（18YF1GA055）。
作者簡介：陳天鐳，雙學士，教授級高級工程師，Email:1327984377@qq.com。
