The tensile force of the steel-plastic geogrid is borne by the high-strength steel wire braided by the warp and weft, which produces a very high tensile modulus under low strain capacity. The steel wires of the longitudinal and horizontal ribs of the steel-plastic geogrid are woven into a mesh, and the outer covering layer is formed at a time, and the steel wire and the outer covering layer can coordinate, and the elongation at break is very low (not more than 3%). The main force-bearing unit of steel-plastic composite steel-plastic geogrid is steel wire, and its creep is extremely low.
Through the treatment of the plastic surface in the production process, the rough pattern is pressed to enhance the roughness of the grid surface and improve the friction coefficient between the steel-plastic composite steel-plastic geogrid and the soil. 4. The width of the steel-plastic geogrid can reach 6m, to achieve efficient and economical reinforcement effect. The high-density polyethylene used in the steel-plastic geogrid can ensure that: it will not be eroded by acid and alkali and salt solutions or oils at normal temperature; it will not be affected by water dissolution or microorganisms. At the same time, the polymer properties of polyethylene are sufficient to resist aging caused by ultraviolet radiation. After the grille is stressed, the vertical and horizontal ribs work synergistically, and no breakage or breakage of the nodes will occur. In actual engineering, after the packing is compacted, it is not eroded by ultraviolet light and oxygen, so it can fully meet the requirements of permanent engineering construction.
Step 1: Prepare steel-plastic geogrid and excavate
The foundation soil must be firm at the bottom of the foundation trench. If the soil is made of heavy clay or wet soil, or has been excavated, the entire material should be removed and replaced by the aggregate base, compacted. Remove all surface vegetation and organic soil. This material should not be used as a backfill. The wall behind the excavation accommodates the design length of the steel-plastic geogrid. Refers to the exact length of the approved plan. Dig the trench at the foundation wall. According to the approved plan, at least 610 mm wide and 150 mm deep plus an appropriate amount to accommodate the buried block. The buried block should be at least 150 mm or 25 mm per 300 mm wall height. Look at the exact number of approved plans. Compact and horizontal groove within 95% standard error.
Step 2: Install basic materials
The base material can be any compactable granular material. Recommend good aggregate, balanced with the particle size, 6 mm to 38 mm in diameter. According to the approved plan, the local drainage pipe is behind the length of the trench wall. The drain pipe needs to be under the sunlight or rain water channel system. See plans for approved locations and specifications. According to the approved plan, lay a minimum of 150 mm of base material in the ditch. A compact mechanical plate compactor checks the level of the entire length and adjusts as needed.
Step 3: Installation basics
Start at the lowest wall elevation. Place the top surface of all units and the raised front lip up, in the center of the substrate. Check and adjust the horizontal and alignment of all blocks on the wall. Check the block level frequently from side to side and front to back. Verify the proper position of all units by inspecting the back of the block or the front lip raised through the back of the eye. Make small adjustments by hitting the unit with a deadly hammer or placing the unit under the coarse sand up to 13 mm. Violations in the base of the road become bigger, such as stacking on the wall. Straight attention to the grass-roots level will ensure the quality of the finished wall.
Step 4: Install wall rock and filler
Fill the hollow foundation course and 300 mm in the surrounding rock blocks. The total size of a small size varies from 6 mm to 38 mm in diameter, and it is recommended to be less than 10%. Use approved backfill to backfill the rocks behind the wall and in front of the base.
Step 5: Compact
The compaction of the block material behind is crucial to the quality of a retaining wall. Use mechanical plate compactors to strengthen the surrounding rock, and then compact the block behind the backfill material. The compact strip is parallel to the retaining wall, and the compaction of additional work details can be seen from the back of the backfill material on the back of the block. Basic courses and adjustments to check the level are necessary. All backfill soil must be compacted to a minimum standard of 95%. Reasonable use of soil compaction equipment. Remove all excess material from the top surface of all units. On a smooth surface. This can assist with the slide block in place when installing courses under the seat.
Step 6: Install steel-plastic geogrid
The layout of the steel-plastic geogrid; this starts at the base. The specified length of the cut steel-plastic geogrid. Check the manufacturer's specifications and strength grid, roll or direction machine. Refers to the precise size and location of the approved plan. Install the raised front lip of the cut edge and the back of the excavation area of the roll layer with a steel-plastic geogrid layer. The excavation area must be fully compacted and level. Stack the blocks with the steel-plastic geogrid on the next course to offset the blocks from the blocks below. Each new one should be positioned with a vertical weld offset of at least 75 mm and tensioned towards the leading edge of the following unit. Perfect operation is not required. Check the straight wall under the line of sight. The block can be adjusted slightly to form a straight line or a smooth curve. Pulling the grid at the back removes any slack. Equity place to install the front wall rock and approved fill soil.
Step 7: Compact
In the installation of 12 core rocks. 300 mm behind the wall. Use approved backfill to backfill the surrounding rock reinforcement area. All surrounding rocks and filled soil must be properly compacted by a plate compactor at the 0.9-meter wall. Maximum 200 mm, compact this time working from the block parallel to the reinforced area after the block path. The minimum 95% standard for all materials compact. Do not use compaction equipment directly on the steel-plastic geogrid. All heavy equipment must maintain a wall of at least 0.9 meters. The design of the wall usually does not consider the surcharge from heavy compaction equipment. Even if the properly installed and compacted retaining wall will rotate forward, when extreme additional lifting equipment is applied to the cofferdam construction and the final score is on the top of the wall. Check and adjust the level, adjust the batter to the wall and stack it up as a wall. It is acceptable that the tolerances or non-level basic conditions established in the block gasket compensation. Requirements for gaskets when working on asphalt shingles and steel-plastic geogrids. The maximum allowable gasket thickness is 3 mm. Remove all excess wall rock ridges or slag from the top surface of all units.