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 or der to determine the contro l index of sett lement difference r easo nably after the constructio n of integr ated drainag e road, an integ rated dr ainage model of r oad surface w as established using the hydraulic and hy dr olog ic methods. The effects of transverse and longitudinal settlement diff er ences o n the discharg e capabilit y wer e analy zed qualitat ively. T he calculation fo rmu2 las of t he allow able slope var iation r ates in t he transverse and long itudinal dir ections w ere conducted, and the slo pe var iatio n rat e was consider ed as the contr ol index of settlement differ ence of integ rated drainag e road. T he model w as applied to a high level road. The r esults show ed that based on the contro l index of settlement difference o n surface dra inag e, the allow able slope var ia2 tion rates in the t ransv erse and longit udinal directio ns are 0. 76% and 0. 22% , respect ively, and the allow able slo pe var iatio n rat e can be determ ined mor e o bjectively and r easo nably fo r different ar eas and ro ad levels based o n the specific r oad str ucture par am2 eter s and met eo ro lo gical condit ions.

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( CH D2009JC117)