初支面前回填注浆技巧交底(国外英文资料).doc

初支背后回填注浆技术交底(国外英文资料) BJ01-71-2003 Technical background record (table C2-5). Serial number The name of the project Beijing metro line 4 huangzhuang - zhongguancun area project Names of parts of tunnel The name of the process Backfill grouting in the back Construction unit China iron and steel co., LTD Date of disclosure 2005.10.10 Content of the disclosure: Homework preparation 1.1 machines and tools preparation 1.1.1 machine tools: injection machine, slurry mixer, air compressor, mixing barrel. 1.2 material preparation Cement, sodium silicate, Ф 32 x3. 25 mm hot rolled steel pipe. 1.3 operation conditions Before the injection, the injection pipe should be cleaned up and cleaned up. The pressure gauge of 1.3.2 injection machine is good, and the high-pressure pipe is unimpeded. 1.3.3 has been fully inspected and tested for mechanical equipment, geomantic piping, cable line etc. The operating area has good ventilation and adequate lighting. The grouting in the back of 1.3.5 must be kept for 28 days. Technical measures of construction and the requirements of main practice 2.1 the process flow Termination of the grouting Perfusion slurry Preparation of Embedded grouting pipe Check the grouting equipment Construction operation points and requirements 2.2.1 the injection pipe 2.2.1.1 ductule USES Ф 32 x3. 25 mm hot rolled steel tube, length of 40 ㎝, when have overexcavation lengthened appropriately, grouting tube into the water It should be with the surrounding rocks. 2.2.1.2 grouting tube is buried in the arch in front of the steel grating, with 3 roots, and the ring spacing 2m, and the vertical spacing is 5m, and the grating welds are strong. 2.2.2 sizing 2.2.2.1 grouting is made of single liquid water slurry, single liquid water slurry is made of ordinary Portland cement, foreign dopant (water glass) and water. 2.2.2.2 mix ratio: 1, 3 ~ 5% of water glass is added to 1. 2.2.3 perfusion liquid nuke underhand Bottom man This form is filled in by the bottom unit, and the u