Discussion on The Application of Three-way Geogrid Reinforcement Reservoir Foundation
Abstract: The mechanism of the interaction between the three-way wholesale polyester geogrid and the soil is expounded. The construction technology and quality control measures of the three-way high quality polyester geogrid reinforced reservoir foundation are introduced, and the powder with high water content in the open reservoir is solved. When the geological conditions of the clay are applied, the bearing capacity of the foundation is insufficient, and a large number of materials are saved, and good economic benefits are obtained.
Keywords: three-way polyester geogrid for sale, open reservoir, foundation
When the open type reservoir is constructed under the geological conditions of silty clay with high water content, the moisture content of the clay reaches over 90%, it is near saturation and the bearing capacity is extremely low. Especially when the bottom of the pool is constructed, the construction machinery and personnel cannot be deployed normally. After a large amount of rough stone needs to be replaced to improve the bearing capacity of the foundation polyester geogrid factory price, the next step can be carried out. In the construction of the pool wall structure, the masonry stone (300mm thick or more) is required to reinforce the foundation of the pool wall. After the three-way wholesale polyester geogrid is used to reinforce the foundation of the reservoir, the next step can be carried out without backfilling the masonry with only a small amount of gravel. In the construction of the pool wall, after laying the three-way polyester geogrid for sale, the clay protective layer can be used to carry out the construction of the geomembrane, and the foundation layer of the masonry stone is omitted. Through the engineering practice, the process simplifies the construction process, saves a lot of materials such as gravel and stone, and has achieved good economic and social benefits.
2. Process principle
The three-way high quality polyester geogrid is extruded, stretched, plated and punched with high-molecular polypropylene, and then stretched in the X, Y and Z directions, with high tensile strength and complete contact with the soil. , the friction with the soil is large, thus preventing the loss of the pool soil and the sedimentation of the basement in different directions. After the water-repellent material such as gravel is backfilled between two consecutive wholesale polyester geogrid at the bottom of the pool and compacted, the bearing capacity of the foundation can be improved. The thickness of the gravel cushion at the bottom of the process is 600 mm, the compaction is 0.93, the thickness of the clay protective layer is 300 mm, and the compaction is 0.90. In the fill-in area of the pool wall, the soil also needs to be laminated, as shown in Figure 1.
3. Process flow and operation points
The bottom of the process: clean the base layer → the first layer of polyester geogrid manufacturers laying → lap, tie, fix → paving the first layer of gravel cushion → compaction → inspection → second layer of polyester geogrid manufacturers laying → lap joint, lashing, fixed → paving the second layer of gravel cushion → compaction → inspection.
3.2 Operation points
(1) Cleaning the base layer: After the debris on the operation surface is removed, the site is leveled (the flatness is not more than 15mm), and the construction of the wall should be carried out after the completion of the soil filling.
(2) Laying of the bottom polyester geogrid for sale: the sprinkling lime line indicates the construction scope. When the lap joint is made of polyethylene rope (the ultimate tensile strength is not less than 100kN/m) and the U-shaped nail connection makes the grille as a whole, and the vertical joints The connection width is not less than 300mm, the lateral overlap width is not less than 500mm, the lap joint is made of polyethylene rope in a “shape” shape, and the U-shaped nail is fixed with 8mm steel bars, one per meter.
(3) Laying of the upper wholesale polyester geogrid at the bottom of the pool: After the construction of the bottom grille is qualified, the upper polyester geogrid manufacturers are laid, and the construction requirements are the same as 2). After the completion, lay the protective layer in time to prevent the grille from being damaged.
(4) Compaction: When the thickness of the filler is not more than 600mm, light compaction machinery is used. When the thickness is more than 600mm, heavy-duty compaction machinery is used polyester geogrid factory price. The grille is not laid to the edge of the slope to prevent the grille from being exposed when the slope is cut. The thickness of the gravel and clay virtual pavement is not more than 150mm, and the clay protective layer of the pool wall is compacted by small mechanical means.
The rolling is carried out from the two sides to the middle, and the overlap is guaranteed to be 1/2, and the joint is made into a stepped shape to control the rolling rate and ensure the number of compaction passes.
Clay protective layer is generally selected from cohesive soil with a water content of about 10%. If the soil is too wet polyester geogrid factory price, it should be aired and mixed with dry soil. If the water content is low, it can be sprinkled with water. When the segment is backfilled, the staggered portion is made into a stepped shape, and the distance between the upper and lower joints is not less than 1.0 m.
(5) Inspection: The gravel cushion is tested by the sandblasting method. The sampling is performed every 1000m2, and the clay layer is detected by the ring knife method. One group of 1000m2 and one set of three points.
(6) Note: The protective layer should be filled within 24 hours, fill in both sides first, then fill in the middle. The packing should be unloaded on the protective layer. All machinery must not walk on the paved high quality polyester geogrid. If damage, puncture, tearing, etc. are found during construction, repair or replace it in time.
4. Quality control
(1) Three-way polyester geogrid manufacturers and gravel are required to be re-examined and can be used for construction after passing the test.
(2) The three-way polyester geogrid for sale adopts an integral punching and stretching three-way wholesale polyester geogrid. The raw material is 100% primary polypropylene, and the tensile modulus in each direction is not less than 225 kN/m, and the carbon black content is more than 2%.
(3) According to the given level, release the side pile and the middle pile, and mark them to control the thickness of the backfill. The reference point should be protected and the reference level should be retested regularly.
(4) In the transportation process, use appropriate transportation tools to avoid damage to the grille. Strengthen protection during construction to prevent pollution and damage.
(5) Laying environment: the temperature is greater than 5 °C, the wind is less than 4, and there is no rain or snow.
(6) The quality inspectors strictly check and make a record polyester geogrid factory price, and the supervision engineer can confirm the construction process.
(7) The mud content of gravel should not exceed 5%, the maximum particle size should not exceed 60mm polyester geogrid manufacturers, and the clay water content should be about 10%. In winter construction, the volume of frozen soil block should not exceed 15% of the total fill volume and should be dispersed. The size of the frozen soil block is not more than 15cm.
5. Benefit analysis
In the construction of the bottom of the reservoir, the masonry can be replaced, and the construction can be carried out after laying the three-way high quality polyester geogrid and backfilling the gravel. In the construction of the wall, the foundation layer of the masonry stone can be omitted, and the next step can be carried out after the clay is backfilled polyester geogrid factory price. Taking the Yantai Taihua New Material Park storage tank as an example, the pool bottom and the pool wall saved a total of 1.379 million yuan, shortening the construction period by 30 days.
Three-way high quality polyester geogrid reinforced reservoir foundation construction speed, quality control, can save a lot of materials, three-way polyester geogrid for sale to prevent the loss of pool soil in different directions, improve the bearing capacity of the foundation, significantly improve the open type The safety and durability of the reservoir. Its economic and social benefits are very obvious.