Sand deposit-detecting method and its application in model test of sand flow

黎伟; 房营光; 莫海鸿; 谷任国; 陈俊生

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Sand deposit-detecting method and its application in model test of sand flow

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摘要

Against the background of the sand-flow foundation treatment engineering of Guangzhou Zhoutouzui variable cross-section immersed tunnel, a kind of sand deposit-detecting method was devised on the basis of full-scale model test of sand-flow method. The real-time data of sand-deposit height and radius were obtained by the self-developed sand-deposit detectors. The test results show that the detecting method is simple and has high precision. In the use of sand-flow method, the sand-carrying capability of fluid is limited, and sand particles are all transported to the sand-deposit periphery through crater, gap and chutes after the sand deposit formed. The diffusion range of the particles outside the sand-deposit does not exceed 2.0 m. Severe sorting of sand particles is not observed because of the unique oblique-layered depositing process. The temporal and spatial distributions of gap and chutes directly affect the sand-deposit expansion, and the expansion trend of the average sand-deposit radius accords with quadratic time-history curve.

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来源
《中南大学学报》 |2013年第10期|P.2840-2848|共9页
作者
黎伟; 房营光; 莫海鸿; 谷任国; 陈俊生;
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作者单位

School;

of;

Civil;

Engineering;

and;

Transportation,South;

China;

University;

of;

Technology;

State;

Key;

Laboratory;

of;

Subtropical;

Building;

Science;

(South;

China;

University;

of;

Technology);

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原文格式 PDF
正文语种 CHI
中图分类 U452.11;
关键词
immersed; tube; tunnel; foundation; treatment; model; test; of; sand-flow; method; sand; deposit; detecting; structural; characteristics; of; sand-deposit;

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Sand deposit-detecting method and its application in model test of sand flow

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