1, construction preparation. In terms of personnel, machinery and equipment, technology, site, materials, etc., a large number of specific and sufficient preliminary construction preparations have been made, and all construction conditions have been met.

2. According to the construction needs of high excavation section, our department has entered the site with all kinds of equipment that can ensure the construction of this section, and the equipment performance is good. The equipment list is as follows.

3. First, restore the alignment, release the sideline piles, and arrange the drainage system before the subgrade officially starts, so as to prevent the water outside the line from flowing into the line during construction, and quickly discharge the water inside the line (including groundwater, rainwater and underground seepage) from the subgrade to ensure the smooth construction.

4. Roadbed rock excavation adopts mechanized construction, K9+640~K 10+040, k10+160 ~ k10+260, k/kloc-0+00. Rock excavation adopts controlled blasting and mechanical excavation. K11+500 ~ k11+920 section is transported by dump trucks due to the dense houses and relatively large population.

5. For the designed drainage system, with the excavation of subgrade, organize the construction in time to ensure no water accumulation in rainy season, and arrange the repair and protection of ditches and slopes in time to ensure the stability of slopes. Mechanical excavation, multi-step excavation of earthwork at the same time, should check the stability of the slope. Determine the safe distance between the excavator and the slope according to the regulations and checking calculation.