泥石流流速横向分布特征与防治工程结构优化

›› 2012, Vol. 33 ›› Issue (12): 3715-3720.

泥石流流速横向分布特征与防治工程结构优化

徐林荣¹，韩征^{1, 2}，苏志满^{1, 3}，吴强¹

1.中南大学土木工程学院，长沙 410004；2.九州大学工学府，福冈 819-0395；3.中国科学院成都山地灾害与环境研究所，成都 610041

收稿日期:2011-09-27 出版日期:2012-12-12 发布日期:2012-12-15
作者简介:徐林荣，男，1964年生，博士后，教授，博导，主要从事地质灾害防治与预警预报、特殊土路基设计理论与施工技术，地基处理和土工合成材料应用。
基金资助:
国家自然科学基金（No. 41272376）；交通部西部交通建设科技项目（No. 200831800087）；四川省交通厅科技项目（No. 2006A024－582）

Research on lateral distribution features of debris flow velocity and structural optimization of prevention and control works

XU Lin-rong¹, HAN Zheng^{1, 2}, SU Zhi-man^{1, 3}, WU Qiang ¹

1. School of Civil Engineering, Central South University, Changsha 410004, China; 2. School of Engineering, Kyushu University, Fukuoka 819-0395, Japan; 3. Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu 610041, China

Received:2011-09-27 Online:2012-12-12 Published:2012-12-15

摘要/Abstract

摘要： 以往研究表明，泥石流流速在沟道横断面上分布不均，但目前尚无理论依据，国内现行相关规范暂时建议在泥石流拦挡坝、排导槽等防治工程设计时，流速、荷载按均布考虑，这与实际的受荷情况有所差别，从而导致防治工程局部稳定性偏小，极易发生工程失效。为此，基于冲淤平衡原理、流体均质假设及沟道横断面形状的合理简化，结合雨洪修正法与形态断面法相关原理，演绎了沟道横断面任意位置流速计算公式的推导过程，并获取了泥石流流速的横向分布的非线性特征。通过四川省地震灾区理县甲司口沟泥石流防治工程的实例分析，发现横向上泥石流的中泓线流速与两侧流速相差达到300%。据此对拦砂坝进行了结构优化设计，在确保功能的前提下，提高了坝体稳定性系数约20%，节约了工程造价约5%。

关键词: 泥石流, 流速, 荷载, 横向分布, 拦砂坝结构优化

Abstract: Former researches indicate that the distribution of debris flow velocity is laterally asymmetrical. Due to a lack of a theoretical basis on it, velocity and load have to be calculated on uniform state advised by current design regulations when the debris flow dam and drainage canal are designed. It is different to the practical status, which may lead to the engineering failure due to the poor partial stability. Therefore, based on deposition-erosion equilibrium, isotropic fluid hypothesis and reasonable simplification for debris flow's gully cross-section, the nonlinearity features of debris flow velocity's lateral distribution was proposed by deducting the deducing process of the velocity calculation formula at any cross-section. With the instance analysis of debris flow mitigation and control work at earthquake-stricken areas in Lixian, Sichuan province, we found that the debris flow velocity at channel line is triple the one at either side, and conducted the structural optimization design for debris dam on the premise of ensuring its function, reducing the risk of the dam break and instability of debris dam, which would rise the dam stability coefficient by 20%, and save the engineering cost by 5%.

Key words: debris flow, velocity, load, lateral distribution, structural optimization of debris flow dam

中图分类号:

TV 8

徐林荣，韩征，苏志满，吴强 . 泥石流流速横向分布特征与防治工程结构优化[J]. , 2012, 33(12): 3715-3720.

XU Lin-rong , HAN Zheng , SU Zhi-man , WU Qiang . Research on lateral distribution features of debris flow velocity and structural optimization of prevention and control works[J]. , 2012, 33(12): 3715-3720.

参考文献

相关文章 15

[1]	李潇旋, 李涛, 彭丽云, . 控制吸力循环荷载下非饱和黏性土的弹塑性双面模型[J]. 岩土力学, 2020, 41(2): 552-560.
[2]	贺志军, 雷皓程, 夏张琦, 赵炼恒. 多层软土地基中单桩沉降与内力位移分析[J]. 岩土力学, 2020, 41(2): 655-666.
[3]	刘成禹, 陈博文, 罗洪林, 阮家椿, . 满流条件下管道破损诱发渗流侵蚀的试验研究[J]. 岩土力学, 2020, 41(1): 1-10.
[4]	覃玉兰, 邹新军, 曹雄. 均质砂土中水平简谐荷载与扭矩联合受荷单桩内力、位移分析[J]. 岩土力学, 2020, 41(1): 147-156.
[5]	韩征, 粟滨, 李艳鸽, 王伟, 王卫东, 黄健陵, 陈光齐, . 基于HBP本构模型的泥石流动力过程SPH数值模拟[J]. 岩土力学, 2019, 40(S1): 477-485.
[6]	谢芸菲, 迟世春, 周雄雄, . 复杂环境中大规模桩筏基础的优化设计方法研究[J]. 岩土力学, 2019, 40(S1): 486-493.
[7]	姜谙男, 张权, 吴洪涛, 段龙梅, 焦明伟, 白涛, . 基于改进局部安全度的爆破作用边坡稳定性分析[J]. 岩土力学, 2019, 40(S1): 511-518.
[8]	唐晓武, 柳江南, 杨晓秋, 俞悦. 开孔管桩动孔压消散特性的理论研究[J]. 岩土力学, 2019, 40(9): 3335-3343.
[9]	王东坡, 陈政, 何思明, 陈克坚, 刘发明, 李明清, . 泥石流冲击桥墩动力相互作用物理模型试验[J]. 岩土力学, 2019, 40(9): 3363-3372.
[10]	吴爽爽, 胡新丽, 章涵, 周昌, 龚辉, . 嵌岩桩负摩阻力现场试验与计算方法研究[J]. 岩土力学, 2019, 40(9): 3610-3617.
[11]	杨文波, 邹涛, 涂玖林, 谷笑旭, 刘雨辰, 晏启祥, 何川. 高速列车振动荷载作用下马蹄形断面隧道动力响应特性分析[J]. 岩土力学, 2019, 40(9): 3635-3644.
[12]	张海娜, 陈从新, 郑允, 孙朝燚, 张亚鹏, 刘秀敏, . 坡顶荷载作用下岩质边坡弯曲倾倒破坏分析[J]. 岩土力学, 2019, 40(8): 2938-2946.
[13]	蔡雨, 徐林荣, 周德泉, 邓超, 冯晨曦, . 自平衡与传统静载试桩法模型试验研究[J]. 岩土力学, 2019, 40(8): 3011-3018.
[14]	竺明星, 戴国亮, 龚维明, 万志辉, 卢红前, . 水平荷载下桩身侧阻抗力矩的作用机制与计算模型研究[J]. 岩土力学, 2019, 40(7): 2593-2607.
[15]	张峰, 陈国兴, 吴琪, 周正龙. 波浪荷载下饱和粉土不排水动力特性试验研究[J]. 岩土力学, 2019, 40(7): 2695-2702.

Metrics

Viewed

Full text

Abstract

Cited

Shared

Discussed