摘要
盐环定扬黄工程干渠穿越了粉沙土、砂岩、盐渍地、膨胀土地带.由于地下水位高,造成地下水对渠道混凝土板的渗透破坏、冻胀破坏、硫酸盐侵蚀破坏和膨胀土膨胀破坏.文章分析了地下水对混凝土板衬砌渠道破坏的原因及形式,提出防止地下水对混凝土板衬砌渠道破坏的对策.在衬砌材料方面选用石料和有抗冻、抗渗、抗腐蚀性能的混凝土板;在衬砌结构中,采用抗冻胀和抗膨胀的排水工程措施,增大渠道衬砌混凝土板下最大静摩擦系数,根据渠道断面采用不同的衬砌方法,保障了渠道工程的安全运行.
Yanhuanging pumping engineering project crosses the silt, sandstone,salty soil and swelled ground zones. The high level underground water causes damages on the concrete board of the canal such as seep, freezing, sulfate erosion and swelling by swelled ground. The paper analyses the causes and formation of the damages, and puts forward the counterplan for protecting the concrete board of the canal from being damaged by underground water. The main measures are: to select those concrete boards with characteristics of anti freezing, anti seep and anti erosion; to adopt the water draining engineering structures which can be free from being frozen and swelled; to increase the maximum static friction coefficient of the underground water under building base to the concrete board of the canal; to rigidly control the construction quality and adopt different building methods according to the section of the canal. With these measures, the canal project can be safely operated.
出处
《宁夏工程技术》
CAS
2003年第4期379-381,385,共4页
Ningxia Engineering Technology
关键词
地下水
渠道
破坏
对策
underground water
canal
damage
counterplan
