The Research Of Curtain Note Liquid For Blocking Water In Geleshan Tunneling

Geleshan tunneling of the railway from Chongqing to huaihua, which is one of the 11th control projects. It is called " the geological museum " by the geological expert because of complicated hydrology geological condition, especially the karst water in the tunnel. At the same time because this tunnel is in particularity of geographical position, local great attention to environmental protection and water-soil conesrvat-ion and requires strictly, the tunnel constructs in the course that it is only too stifled to arrange to the karst water.This text is on the basis of summarizing the domestic and international tunnel of preventing and curing experience to the karst water, combine the concrete conditions of the long tunnel of GeLeshan, well up to karst water adopt rational prevention and cure scheme and karst impact on regional environment go on research in dealing with. The groundwork that this text does is as follows:1. It is complicated to combine this project geological condition, karst development, environmental protection requirement rigorouslies enforce the characteristic, adopt the macroscopical prediction of bad geology of body of hole of the tunnel, the bad geological body of body of hole of the tunnel is predicted leadingly (the quality is predicted leadingly in namely the narrow sense tunnel), leading drilling and tunnel hole body construction geological calamity alarm, etc. synthesize quality predict technology go on geology of the tunnel predict leadingly.2. Have carried on the curtain note thick liquid technical research of the whole section. According to synthesize quality predict karst water position that result confirm, is it deposit form, water yield and water pressure, etc. initial terms to compose leadingly, put forward preliminary curtain note thick liquid construction scheme and corresponding homework parameter and craft, and is revising, optimizing constantly in practice.3. Form a complete set after developing the curtain note thick liquid equipment. To tunnel note thick liquid of Leshan of the song being big in scale, the thick liquid pressure of the note is high, it is urgent in time limit for a project that construct, the equipment is expected much, and there is no available state which is suitable for thehigh-efficient note thick liquid complete sets needed in tunnel of Leshan of the song yet at home at present, develop some equipment and related small-scale machines independently while constructing, make up flexible rail competent type hole note thick liquid train , make holing , the note thick liquid is combined together, improve work efficiency, the whole section deep hole curtain note thick liquid moon up to 60 tunnel prolong the rice equally. And has recommended holing and happened suddenly welling up water and constructing and controlling technology. 4. Estimate the effect of the technology of curtain note liquid for blocking water, that means rich impact on area ecological environment of the tunnel of construction of water district of tunnel karst to study. Adopt the network examined more on a large scale and carry on systematic environment monitoring and appraisal. Set up the environmental monitoring point that total amount is up to 40 places in it is regional to pass through the earth' s surface 34. 75Km2 range in the tunnel, form the environmental monitoring network, has constructed and launched karst hydrology geological survey in earlier stage, confirm the initial state of hydrology of the earth' s surface, follow observing every day construction time, set up and observe the file for a long time, and according to the monitoring data, the groundwater resources , influence degree of the ecological environment that appraise the tunnel and construct correctly.The tunnel of GeLeshan passes and uses advanced note thick liquid technology while constructing, is it close in most heavy to well up water amount reach 14000 m2/d, pressure up to karst of 2. 2MPa well up water-to succeed in, prove rich location, district of water, adopt the whole section deep hole curtain note thick liquid stop...