塑性砼防渗墙施工技妙策划(国外英文资料).docVIP

塑性砼防渗墙施工技术方案(国外英文资料) Construction technology of the plastic concrete anti-seepage wall of dam First, preparation for construction (a) survey and geological conditions, complex can be within the scope of the project, find out the geological, formation, soil and hydrology situation, for choosing the mud circulation process, such as slot length to provide reliable technical data, and cut-off part to ascertain the underground obstacles. (2) clearing the ground: the site is levelled and excavated the underground obstacles within 3 meters of the ground floor. Test (3) : in similar area to the construction site engineering geological conditions of the experiment, in order to obtain pore, solid wall mud, such as wall pouring construction technology and parameter. Construction plan: Total length of 3.780 km, the block reservoir cut-off wall 30 cm thick, plastic concrete cut-off wall reference mixing ratio of cement, sand, gravel, clay, bentonite: water = 135, 640:920-145:70-280 (weight ratio). Construction can be adjusted according to field test parameters, which made the density of plastic concrete cut-off wall for 19 ~ 21 kn/m3, the elastic modulus value in 200 ~ 1000 mpa, deformation has better adaptability, 28 days compressive strength value is greater than 2 mpa, into a wall after the permeability coefficient is less than 1 x 10-6 cm/s, allowing greater than 60 seepage gradient. According to the experience of the construction of the anti-seepage wall in similar areas, and according to the design requirements, we have worked out the overall construction plan for the dam of the main dam. (1) using the ct-30 percussion drill to drill into a groove; (2) adopting bentonite mud wall; (3) the barrel method replaces the mud hole; (4) the use of on-site mixed concrete; (5) the concrete of the helicopter under the mud; (6) steel wire rope auxiliary concrete pouring; Third, construction craft, method Using the drilling and splitting hole, the impact drill is made into the groove,