Detailed Technical Process for Resin Linear Drainage Channel and Decoration Works

1. General Construction Flow

2. Sequence of Drainage Pipe Jacking

Pre-Construction Preparation for Resin Linear Drainage Channel

1. Construction shall not start with random excavation. Site investigation and geological survey must be carried out first to confirm suitable locations for drainage channel construction.
2. Before trench excavation, check and verify the setting-out lines.
3. Before foundation pit excavation, inspect underground structures and existing drainage systems on site. Complete surface drainage works to prevent groundwater from flowing into the trench, which will affect construction. This step is mandatory.
4. Organize construction personnel and machinery, and conduct all safety and technical disclosures to ensure smooth completion of the works.
5. Machinery for earth excavation: crawler mini-excavator.

Construction Process of Resin Linear Drainage Channel

1. Use a level to set the central axis line, mark with wooden stakes. Measure the inner edge of the ditch with a ruler and mark the slope with black lines. Mark boundaries and wall alignment lines as well.
2. Manually excavate soil within the setting-out area, strictly controlling the excavation depth and size per design to avoid deviation. Level the trench bottom with dry-mixed mortar.
3. Install side formworks (processed timber), fixed with concrete nails. Install vertical supports every 1.4 m to prevent formwork displacement. Apply release agent on the contact surface between formwork and concrete.
4. Cover and cure the concrete with water within 24 hours after pouring. Under normal temperature, water at least twice a day; curing period shall not be less than 7 days.
5. Monitor weather conditions during construction, avoid working in rain, and take rainproof measures.
6. No materials shall be stacked within 2.2 m around the trench. No vehicles are allowed near the excavated pit edge.
7. Install rainproof facilities around the trench and restrict access by non-construction personnel.

Earthwork Guidelines During Resin Linear Drainage Channel Construction

1. Mark the excavation contour of the trench edge clearly.
2. Manual earthwork shall not damage nearby structures and underground pipelines.
3. Monitor slope stability at all times; handle landslides immediately.
4. Inspect the trench promptly after excavation, then pour and seal the cushion before proceeding to the next process.
5. Reserve a working space of at least 470 mm between the trench bottom and the foundation/cushion edge. Install ditches and catch wells on one side to drain water timely.
6. Protect survey control stakes and axis piles, cover with steel cages, and assign dedicated surveyors to guard them.
7. During excavation, check positioning stakes, axis piles and formworks for firmness and alignment.
8. Monitor soil condition and groundwater changes and keep records. If the foundation soil does not meet design requirements, coordinate with the design department for solutions.
9. Earthwork shall ensure slope stability; no random patching is allowed. Solve problems promptly.
10. When excavating to 46 cm above the trench bottom, mark the axis line as the reference for leveling.
11. Stockpile excavated soil at least 4.6 m away from the trench edge, with stacking height not exceeding 4.9 m.
12. Level and repair the trench bottom after completion.
13. Transport all surplus soil after backfill and compaction.
14. Reduce vibration to the foundation after pit excavation. If foundation works are delayed, leave 0.5 m of soil unexcavated and remove it before construction.