沙漠地区公路植物防沙体系维护技术及效益分析——以G304国道公路植物防沙体系维护技术为例

SAND CONTROL TECHNIQUES AND BENEFIT ANALYSIS OF SAND-PREVENTION ENGINEERING SYSTEM FOR HIGHWAY IN DESERT REGION

本文以G304国道公路为例,选择典型路段K456-459km和K466-468km(通辽市科左后旗境内)为试验区,研究了公路路域范围内防护体系存在的问题及解决办法。认为植物种单调、防护体系结构不完善,自我调节能力弱、稳定性差是影响防护体系效益的主要原因,提出封育、人工补植、加强管护是调节林分结构、完善防护林网、保证沙漠地区公路畅通的主要措施。维护后防沙体系稳定性明显增加,并有效地降低了风速,增加了地表粗糙度,削弱了风沙流强度,达到了阻截流沙,控制沙害、保证公路畅通的目的。

This paper is the highway of G304 as an example, choosing typical road of K456 -459km and K466 -468k.m as experiment area in the KeYouHou county of TongLiao city, having studied the existent problem and way of protection system in the road area scope. The floristies is monotonous, the protection system structure is not perfect, the regulating ability by one＇s own is weak, the sta- bility is bad, above all, is a main reason that affects the protection system, put forward natural protection, the artificial repairs to plant, strengthen protection is main measure toregulate the woods structure, perfect shelter forest net, assure desert of highway unimpeded . Increased obviously the sand system stability after protection and conservation, and lowered availably the wind velocity, increased the rough degree of earth＇s surface, weaken the strength of the sandstorm flow , obstruct from quicksand, control the sand harm, unimpeded purpose of highway of assurance.