集中截流式排水道路路表工后沉降差控制指标  

Control index of settlement difference after construction of integrated drainage road

作　　者：闫强[1,2] 刘保健[1] 孙建勋 

机构地区：[1]长安大学特殊地区公路工程教育部重点实验室,西安710064 [2]广西交通投资集团有限公司,南宁530021 [3]中交第四公路工程局有限公司,北京100022

出　　处：《南水北调与水利科技》2015年第3期568-570,共3页South-to-North Water Transfers and Water Science & Technology

基　　金：青海研究观测基地开放基金项目(20110401);教育部中央高校基本科研业务费专项资金项目(CHD2009JC117)

摘　　要：为了合理确定集中截流式排水道路路表工后沉降差控制标准,应用水力水文学等知识和方法,构建了路表集中截流式排水模型,定性分析了路表横向和纵向沉降差对该排水模型宣泄能力的影响,建立了路表横向和纵向容许变坡率计算公式,并以变坡率作为集中截流式排水道路路表沉降差控制指标。最后以某高等级道路为依托进行了计算示例,示例计算结果表明,在该道路条件下基于排水要求的路表工后沉降差控制标准:横向和纵向容许变坡率分别为0.76%和0.22%;而对不同区域及不同等级的道路,应根据道路结构参数及所处地域气象特征计算确定,这样更加客观和准确。In order to determine the control index of settlement difference reasonably after the construction of integrated drainage road, an integrated drainage model of road surface was established using the hydraulic and hydrologic methods. The effects of transverse and longitudinal settlement differences on the discharge capability were analyzed qualitatively. The calculation formu las of the allowable slope variation rates in the transverse and longitudinal directions were conducted, and the slope variation rate was considered as the control index of settlement difference of integrated drainage road. The model was applied to a high level road. The results showed that based on the control index of settlement difference on surface drainage, the allowable slope variation rates in the transverse and longitudinal directions are 0.76 % and 0. 22 %, respectively, and the allowable slope variation rate can be determined more objectively and reasonably for different areas and road levels based on the specific road structure parameters and meteorological conditions.

关 键 词：道路 路表排水 沉降差 集中截流式 水力模型 变坡率 降雨强度 

分 类 号：U418.6[交通运输工程—道路与铁道工程]