High-speed rail tunnel vault with grouting construction technology and materials

High-speed rail tunnel vault with grouting construction technology of tunnel lining vaults with grouting technology of tunnel lining vaults with high-speed rail tunnel vault 158 - grouting construction technology and materials 3830 - 4411 high-speed rail tunnel vault with grouting construction technology and material, be in namely on the embedded radial RPC grouting pipe, after waiting for two lining concrete pouring 2 h in a timely manner through RPC grouting pipe began to dedicated high early strength filling mortar shall be flow ( Velocity flow slurry) Grouting to simplify the traditional process, improve the quality of grouting, the purpose of reduce the project cost. A, RPC grouting pipe RPC grouting is developed by our company T180 ultra-high performance concrete material forming, through high temperature steaming to raise the specific process such as a new type of cement grouting pipe. Compared with the traditional grouting pipe has the following characteristics: 1, high strength, resistant to concrete extrusion, not break; 2, stick relay is good, with concrete and concrete forming a whole bonding surface; 3, easy to use, can cut processing; 4, easy installation, can be embedded installation, also after pouring concrete curing, for punching installation; 5, good durability, its service life more than concrete subject, as to meet the requirement of free maintenance. RPC performance index number of the grouting pipe project indicators 1 / (compressive strength kn /米) ≧ 1002 flexural strength/MPa ≧ 183 length / / mm36 ≧ 6004 mm diameter plus or minus 15 diameter/mm15 + 0. 5 second, CGM filling slurry CGM high early strength filling mortar shall be flow ( Velocity flow slurry) Is composed of high speed wire rod water reducing low alkali silicate cement, quartz sand, beautiful seam an agent, shrinkage compensation beautiful seam an agent, multiple minerals active material, such as raw materials, according to the optimized proportion through the computer control of the production line fully mixing of dry powder mortar material, use water mix tunnel with touch grouting construction can be achieved. Has high liquidity, micro expansion, has a certain toughness, strong bond with concrete, anticorrosive durable characteristic. CGM high early strength filling mortar shall be flow performance index number detection project technical index fluidity of 1 / mm machine ≧ 38090 min ≧ 3002 compressive strength/MPa12h ≧ 3. 51 d ≧ 2028 d ≧ 503 flexural strength/MPa12h ≧ 1. 01 d ≧ 428 d ≧ 104 bond strength/MPa1d ≧ 1. 028d≧2. 05 plastic expansion rate / 28 d ≧ % 0. 3 *, 50 kg/bag, recommend a water-cement ratio: 0. Three, tunnel vault with 18 1 touch grouting process equipment. Double mixing pulping grouting all-in-one double mixing pulping and grouting machine is mainly used for hydroelectric power, railway, transportation, construction, mining and other industries, sew cement, water reducing agent is mixed with water and other beauty add seam an agent, and rapid supporting slurry, change machine adopts eddy current pulping compared with general blade of mixer, are fast pulping, slurry mixing evenly, shotcrete far higher characteristic. 2. Car modification in the lining of the roof modules connected end to end from a circular lining opened three Φ 40 mm holes, in order for the grouting hole, the middle vent ( Secondary grouting hole) And end MoPai porosity. Then the welding flange. Four car roof grouting hole position setting, tunnel vault with touch grouting process 1. Process flow diagram: