کد مقاله کد نشریه سال انتشار مقاله انگلیسی ترجمه فارسی نسخه تمام متن
4743308 1641790 2015 12 صفحه PDF سفارش دهید دانلود رایگان
عنوان انگلیسی مقاله ISI
Mitigation of geohazards during deep excavations in karst regions with caverns: A case study
ترجمه فارسی عنوان
مقابله با خطرات جغرافیایی در طول حفاری های عمیق در مناطق کارست با غارها: مطالعه موردی
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه علوم زمین و سیارات مهندسی ژئوتکنیک و زمین شناسی مهندسی
چکیده انگلیسی


• We introduce the distribution of buried karst in Guangdong Province.
• Serious geohazards are discussed during diaphragm wall construction in caved karst region.
• A treatment technique to fill the karst caverns is presented.
• A case study using the treatment technique of karst cavern filling
• The mechanism of leakage process of diaphragm wall was discussed.

Karst landscapes are widely distributed and different characteristics are displayed in different regions due to the effect of various natural environmental factors which occur throughout China. Buried karst cavern systems covered by sandy strata, which are widely distributed in Guangdong Province, possess the following features: high fissure water content, high rock permeability, susceptibility to collapse, variability in shape and an irregular distribution. Socket diaphragm walls are usually adopted to retain soil and to cut-off groundwater during deep excavations in Guangdong Province, for the safety of the excavation and to reduce the impact on the surroundings. However, geohazards often occur during the construction of diaphragm walls in karst regions, causing problems such as diaphragm wall collapse, water or mud ingress, ground collapse and long-term instability. An eight-step treatment technique is proposed, which involves filling the karst caverns before the construction of diaphragm walls. A case study using the treatment technique in Maanshan Park Station on Guangdong Metro Line 9 is also presented. Leakage of the diaphragm wall was observed during the excavation, and grouting failed to seal the leakage. The mechanism of the leakage process was analysed and countermeasures were undertaken.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Engineering Geology - Volume 195, 10 September 2015, Pages 16–27
نویسندگان
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