基于水–土相互作用理论的土工织物渗透稳定性能判别方法及应用

doi:10.3724/1000-6915.jrme.2025.0521

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摘要如何同时满足土工织物滤土、透水性能及其淤堵程度的要求，是协同发挥其作为反滤料时的渗透稳定性能的关键。为此，先通过物性试验选取4种典型的无纺土工织物为研究对象，进而在常水头条件下开展16组含土工织物土柱的水力坡降比试验，通过测算其渗透系数、平衡时的水力坡降比和细粒冲刷流失量评估其渗透稳定性能；其次，基于水–土相互作用理论，以被保护土的粒径和土工织物的孔径为随机变量，提出用失效概率表示的土工织物滤土性能判别方法，进而依据现有文献和本文试验评估的85组含土工织物土柱数据划分滤土性能界限；最后，采用土工织物淤堵后的渗透系数比值判定其表面形成桥接结构时的透水性能及其局部淤堵程度，并将提出的土工织物性能判别方法应用于反滤料设计中，结果表明：提出的方法对性能有效和堵塞或闭塞型失效的划分准确度优于现有方法，在设计时建议选取单位面积质量较大的聚丙烯纤维长丝土工织物作为反滤料。

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	张昭1
	2*
	马浩1
	张远傲1
	张钊3
	周子豪1
	沈栎萱1

关键词 ：土力学, 土工织物, 渗透稳定, 滤土, 透水, 淤堵, 反滤料

Abstract：How can the essential requirements of retention, hydraulic conductivity, and clogging for geotextile filters be simultaneously satisfied? Coordinating the assessment of their seepage stability performance is crucial. To achieve this, sixteen soil-geotextile column hydraulic gradient ratio tests were conducted using four typical geotextiles. The seepage stability was evaluated based on hydraulic conductivity, stable hydraulic gradient ratio, and the washout of soil fines observed during the tests. Additionally, both the grain size of the soil and the constriction size of the geotextile were treated as random variables. Utilizing soil-water interaction theory, a retention assessment approach was proposed based on the probability of ineffective retention. The performance limits of retention were determined using data from eighty-five experimentally assessed soil-geotextile columns. Furthermore, a hydraulic conductivity assessment approach was developed, considering the partial clogging of the geotextile due to the formation of a bridging structure. The results indicate that the proposed design criterion surpasses previously published criteria in effectively distinguishing between clogging or blinding in ineffective and effective systems. It was found that polypropylene long-filament geotextiles with a high mass per unit area are particularly well-suited for use as filters.

Key words： soil mechanics geotextile seepage stability retention hydraulic conductivity clogging filter

引用本文:

张昭1，2*，马浩1，张远傲1，张钊3，周子豪1，沈栎萱1. 基于水–土相互作用理论的土工织物渗透稳定性能判别方法及应用[J]. 岩石力学与工程学报, 2026, 45(2): 594-612.
ZHANG Zhao1, 2*, MA Hao1, ZHANG Yuan?ao1, ZHANG Zhao3, ZHOU Zihao1, SHEN Yuexuan1. An approach to assess the seepage stability of geotextile filters based on soil-water interaction theory and its application. , 2026, 45(2): 594-612.

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https://rockmech.whrsm.ac.cn/CN/10.3724/1000-6915.jrme.2025.0521 或 https://rockmech.whrsm.ac.cn/CN/Y2026/V45/I2/594

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