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Brief Treatment Methods soft road

The coarse sand. 4.1.2 Construction Procedure ① sanding. Well construction in the sand until the surface Xianpu a sand cushion. And set the gutter, so that the filling will not have a higher water table. ② sand into the water wells. The law is to break into, vibrating pile type, water jet-type, spiral type and bag type and so on drilling. Either way the general sinking depth of 15 ~ 20m, more than the cost of the project significantly increased the depth. Into the pile type and Vibration This is the most commonly used in two ways. When using the crawler crane was sinking into the depth of about 10m; the use of special steel piling rigs, sank to depths up to 30m. Pile diameter generally use the 30 ~ 50em, spacing of 1.5 ~ 3.0m. Vibratory pile into the type and extent of roughly the same type of construction: (1) casing pipe connected to the bottom of boots. Placed on the wells in the design; (2) Chung Chung steam hammer blow or vibration of vibration to the design depth; (3) feeding tube with a bucket in the sand; (4 ~ 5) will be fed sand mouth closed, while pressed into the air, pull out the tube side; (6) to be completely pulled out the casing, sand wells sunk ends. b. Water jet-type of the method compared with other minimal disturbance to the soil, rich in water, sludge treatment should be adopted without difficulty. The construction sequence: (1) set in the design of the casing on the well location; (2) into the nozzle lever in the casing, and disheartened with the water jet spray; (3) Once you start shooting water, will slowly decline in the casing. In case of obstructions or consolidation of the hard layer, the casing can hammer lightly tap the top surface; (4) to the design depth of casing nozzle lever down, so that the soil pipe in the overflow. (5) poured into the sand, slowly pull out the casing, sand will come as well. c. Drilling screw drilling screw type and pocket type of diameter 40 ~ 100cm, drill into the depth of 1Sin around on the ground disturbance in this Act, but the construction is slow. Pocket style is to avoid the well filled by the soil off the sand, not water, but the sand about 12cm in diameter into the permeable flexible bag. Construction Notes: ① spaced according to design sand wells. Signs with different colors or have to enter into the wells to be. ② guides should always remain upright, and regular checks. Into the depth according to design requirements. ③ allowed to enter a faster rate, but pull out the speed should be controlled at the casing filled with sand and compressed air to operate as a degree of calm. Carefully pull the casing when the sand under the arch in conjunction with the casing have been put on clearance. This often makes soft sand column off Sand invasion. ④ material can be filled with sand into a continuous conveyor belt, may also enhance the feeding funnel, measured from the right consideration. The latter is superior. These are the road the road the more commonly used in soft ground treatment methods, In addition, in some special cases, and the use of Soft Ground Soft plastic drain board and so on. (Continued from page 125) 3.4 High Modulus Asphalt Concrete drill core samples using the method checks compaction and porosity. The frequency of inspection: a paving or rolling half-size full-size construction per kilometer of road to take 2 to 4 core sample. Get low construction quality stable, unstable quality of construction to take high values. 3.5 used in forming the road surface permeability coefficient was used to probe permeability coefficient, detected by sanding the road surface texture depth. Indicators forming modified asphalt mixture forming high modulus permeability coefficient of not more than 8Om 【/ rain lateral force coefficient is not greater than 55mL/min SFC 54 or greater than or equal to 72 put the value of FB (BPN) greater than or equal structural depth of 45 or greater than or equal to 72 0.55mm high modulus greater than or equal 0.66ram ■ asphalt and modified asphalt mixture comparative table of the test index can be seen from the table, high modulus asphalt seepage coefficient, sliding coefficient, structural depth of 128 [Editor: Han Ming] degrees Conclusion: high modulus asphalt concrete for the first time in ten line test is relatively successful,[link widoczny dla zalogowanych], to achieve the desired results, for future large area in the road sector played a positive role in the promotion. In the absence of construction experience in this area, most of our construction is based on the theory books to guide the construction, taking into account the method of construction of modified asphalt. Some of the construction of one-sided pursuit of smoothness and reduce compaction temperature, which is made taboo. High modulus asphalt concrete for the construction materials should be special attention to the quality of the construction management process temperature and compaction, so that the mixture fully compacted. Construction in the future, we will work closely with local traffic and weather conditions, constantly sum up experience, continuous improvement, so that the new technology into full play the role. 【
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