Introduction to Long Guide Wall of Diaphragn Wall
This existing building has three underground levels, and the new building has four. The depth of the existing continuous wall is 26m, while the newly added continuous wall has a depth of 37m and is closely adjacent to the inside of the existing continuous wall. Thirty-two new piles are installed, each positioned differently from the existing pile locations. The geotechnical challenges of this project were addressed through careful consideration, and the construction was successfully completed as scheduled and in accordance with quality standards.
Step 1
Removal of FS slabs and B3FL trench location
- Within the planned section, remove the existing FS slab.
- Backfill with 3000psi concrete.
- Leave the starting reinforcement for the new inner and outer trenches and remove the existing B3F slab.。
Step 2
Construction of the first trench and retaining wall
Construct the first inner and outer trench walls, compartments, and external retaining walls.
Step 3
Backfilling of the first compartment wall and retaining wall
After curing the structures in the previous step 2 to the required strength, fill the inside of the trench with sand and the outside with crushed stone or graded material.
Step 4
Removal of the entire B3FL slab
Remove the entire B3F slab and, after marking the positions of the new piles on the existing FS slab, remove the existing FS slab structures at the locations of the new piles.
Step 5
Backfilling of the entire area below B3FL
Backfill the entire area up to the B3F slab.
Step 6
Repeat the construction of the second to fifth deep trenches and removal of the B1F structure
Repeat the above process to construct the second to fifth deep trenches, compartments, and retaining walls. Remove the existing structures from B3F to B1F, backfilling the entire area up to the existing B1F slab.
Step 7
Construction of the sixth deep trench and continuous wall excavation pit
Construct the sixth deep trench and backfill the entire area. Sample and construct the excavation pit structure for the continuous wall.
Step 8
Construction of the seventh deep trench and backfilling of the entire area to ground level
Construct the seventh deep trench and backfill the entire area to ground level.
Step 9
Completion of the entire trench, excavation pit, and pavement
Complete the concrete pavement for the construction route, and the entire continuous wall deep trench construction is finished.
