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Deformation and stability of a slope monitoring tunnels

Landslide displacement curves and deep stability discrimination Mountain, l8 paper page 5 44O-I44 lO May 2000. [2] Wu Jingui 3l9 State Road, Longmen, Xinluo District, Longyan City Kaotang landslide monitoring and analysis, Fujian Building Supplement 2000 (Total 7O period). [3] Paul new, Zhao Xiaoping, Du Yufei,[link widoczny dla zalogowanych], etc., Thai Gan Expressway k21l slope stability monitoring and evaluation. Report of East China Jiaotong University, 2004. [4] Wu Zhonghua, Zhao Quanlin, Geheyan reservoir bank landslide deformation monitoring, and the people of the Yangtze. Volume 9 Section 3O. [5] should be towards the deep Huanglashi landslide displacement monitoring of long, Jiang Academy of Sciences, 17 No. 2 April 2000. 74I on the next page 75) 200m deep wells in the hole pressure is to fully meet the requirements. DTH different diameters at different drilling depth of the hole depth required to form the wind ■ back to speed on the drill pipe diameter holes of various diameters deep hole drilling systems required air flow m3/min (m】 (inn) (m / s) Number of 250ram in 300mm ~ 350mm101.O640.g761.6485.8089l51.0862.4793.94l3l_14300101.O637.0757.6782.00l14l51.0856.6788.13l25_33101.0841.6462.6387.4289l51.1264.789742135.9o40O101. 0837.7758.7683.55ll4l51.1258.779l_39129.9O10l_o942.O363.2l88.2389l51.1566, 52l00.03l39, 64500101.O937, 1259_3084.64l14 - l51.1560.3493.84133.45101.1l.8064.3789 .8589 l51.1767.67l01.77l42.07600101.1l38.8260-3985.87l14151.176l-3995.47135.77 three air foam drilling technology 1, the bubble brought together flour and effect principle of the current foam used in construction have detergent, sodium dodecyl benzene sulfonate, ADF-1 and QK-type foam. The foam has a fluid flow of the gas and liquid unsaturated two structures. which is the continuous phase, and gas non-continuous. This foam group, to effectively form a foam structure viscosity and structural strength. The population structure in the foam, and debris also has affinity adsorption capacity, thus forming a stable structure, strong ability to carry the gas, liquid, solid-fluid phase one of the parcels. This bubble fluid. with light weight, contact area, carrying flour and strong structural properties. using foam drilling, not only can make more than 5O pure drilling time to reach, but also effectively reduce wind speed on the back, reducing the amount of light for the air; can be achieved and the return to the same speed as 15rrds chip results. from the borehole completed four test data points board, foam drilling chip removal capacity reduction equivalent to 1 / 3 on the back for air flow and wind speed. that the bubble on the back of drilling a single air drilling as fast as 60%. so. According to schedule the required air volume is calculated. 30o in use for a 350mm deep hole hammer drilling holes 500m when the air flow requirements for the 33-45m3/min, medium-capacity air compressor can meet the. 2 foam process performance parameters and perfusion experiments, the use of foam sodium dodecyl benzene sulfonate, the ratio of the of water per cubic plus 10-15kg for the best. At this point the concentration of 0.1-0.5% foam, foaming rate. carrying flour ability. using ADF-1-type foam, the ratio of water per cubic Add 0.6-1kg for the best. bubble concentration was kept at 0.6 - 0.1% for the best. using detergent foam. The effect is much worse, when the dosage formulation ingredients according to box made of foam agent bubble situation. perfusion with a good foam in two ways. First, the wind foam pump three-way valve through feng shui. to put equal pressure pump delivery volume l5-20L/rain. this method can effectively foam drilling the advantages of advanced technology. rows powder effect, the hole clean and drilling efficiency. Second, a one-time infusion foam. that is, each one back to the times after drilling completion, and a large amount of 40L/rain pump pumped the bubble hole then start drilling. every time drilling scheduled times. blow hole 3O minutes. has the effect of purification can be achieved. This method is simple, but less efficient drilling, and will increase the circulating pressure wells, it is rarely used