Plastic drainage boards are alias plastic drainage belts, which have a variety of shapes such as wavy and harmonica. In the middle is an extruded plastic core board, which is the skeleton and channel of the drainage belt. Its cross-section is parallel cross, and both sides are wrapped with non-woven geotextile as the filter layer. The core belt plays a supporting role and the water infiltrated by the filter layer is discharged upwards. , It is a good vertical channel for the treatment of soft foundations by using the drainage consolidation method such as sludge, silt soil, flushing fill and other saturated viscous and miscellaneous fill, which greatly shortens the consolidation time of soft soil. Today, I will introduce the construction technology and construction pictures of plastic drainage boards for everyone. I hope to help friends who have this need! Plastic drain board introduction Plastic drainage boards are alias plastic drainage belts, which have a variety of shapes such as wavy and harmonica. In the middle is an extruded plastic core board, which is the skeleton and channel of the drainage belt. Its cross-section is parallel cross, and both sides are wrapped with non-woven geotextile as the filter layer. The core belt plays a supporting role and the water infiltrated by the filter layer is discharged upwards. , It is a good vertical channel for the treatment of soft foundations by using the drainage consolidation method such as sludge, silt soil, flushing fill and other saturated viscous and miscellaneous fill, which greatly shortens the consolidation time of soft soil. Plastic drain board working principle The plastic drain board is inserted into the soft ground with the inserter, and the void water in the soft ground is discharged from the plastic drain board into the sand layer or the horizontal plastic drain pipe under the action of the upper preloading, and discharged from other places, accelerating. Consolidation of soft ground. In the soft ground treatment, the function of the plastic drainage board is designed, and the construction equipment is basically the same as the sand and sand well. Advantages of plastic drainage boards for reinforcing soft soils: 1. Good water drainage, smooth drainage, and guaranteed drainage. 2. The material has good strength and ductility and can adapt to the deformation ability of the foundation without affecting the drainage performance. 3. The drainage plate has a small cross-section, and the disturbance to the foundation during the application of the drainage plate is small. 4. The plugboard construction can be performed on the super soft foundation. 5. The construction is quick and the construction period is short. Each sheeting machine can be inserted more than 5000m per day, and the cost is lower than that of bag sand wells. For the consolidation of deep soft ground using drainage consolidation, it is technically and economically considered that the use of drainage panels is almost the only economical, effective and feasible method. Plastic drainage board construction preparation 1. Main materials and equipment (1) Plastic drainage board (Product specifications according to the design requirements combined with construction technology conditions to choose its type and model). (2) Main construction equipment (including guide frame, casing, vibratory hammer with driven casing sinking, reel and windproof device for loading the drainage board, etc.) for applying the drainage board, and IJB-16 type can also be used. The flapper can also be used to change the working device with a crane pile driver and a simple flapper. 2, operating conditions (1) In the technical preparation before construction, according to the design requirements of the foundation and the topographic and geological conditions, the layout of the drainage holes and the order of inserting drainage plates are determined. (2) Construction sites and roads shall comply with the requirements for plugging drainage boards, such as the entry and exit of construction personnel and equipment, and arrangements for temporary facilities (including hydropower, communications, etc.). (3) After the site drainage hole position is determined according to the construction organization design, the jack position shall be marked with a bamboo stick. (4) The working conditions for the dredger fill. Plastic drainage board operation process 1. When the board is inserted, after the board insertion machine is in position, the vibratory hammer drives the bushing to align with the jack position to sink. The drainage board is connected from the bushing through the anchoring shoe of the head, and the bushing presses the anchor board to push the drainage board. Insert the design into the depth of the soil, pull up the casing, anchor the anchors together with the drain plate and leave them in the soil, and then cut the continuous drain plate to complete a drain hole insert plate operation. The card inserter can be moved to the next drain hole to continue playing. 2. When cutting the drain plate, leave a 15-30cm “platen†on the original floor; then dig up the 20cm deep bowl-shaped concave position next to the “plate head†and then expose the exposed plate head. Cut it out, fill it in, and complete construction of the flapper. Plastic drainage board quality standard 1, plastic drainage board material requirements The plastic drain board is the factory's styling product, and the combined indicators for checking the performance and effect of the product when making the selection are as follows: (1) The choice of tensile strength shall not be less than 1KN (the actually used SPB-1 plastic drain plate tensile index ---- Core: 1.7N/mm2; Filter: 0.44N/mm2). (2) The elongation rate is 2%-10%. (3) The tear resistance should exceed 300N (actual SPB-1 filter tear is 1340N). (4) Water permeability ≥10-3mL/s. (5) The membrane permeability coefficient is not less than 4.2×10-4cm/s (we must also consider the deformation resistance, soil-preservation, and long-term drainage effects of the drainage plate). 2. Drainage hole requirements (1) The spraying process maintains the verticality of the drainage hole, and the vertical deviation is controlled according to the depth of entry ≤1.5-2cm/m (1.5%-2%). (2) The position of the drain hole shall be applied at the spacing required by the design, and the general position deviation shall not exceed 5cm. 3, Drainage board plug request (1) Maintain the continuity of the drainage board into the soil and find that the fracture is reapplied. (2) The length of the upper and lower lap joints connecting the drainage board shall not be less than 10CM, and the connection shall be firm. (3) Remove the pipe after inserting the drain board to the design depth. (4) After the drain plate is inserted and cut off, the length of the “head†exposed on the ground cannot be less than 15cm. 4. The relevant parameters of soft soil or super-soft soil foundation through pre-pressure drainage consolidation are as follows: Site preloading -15-120KN/M2. After one month of classification and loading, the settlement amount reached more than 20% of the total thickness of the soil layer; the moisture content of the soil was reduced to about 50%. Drainage board construction precautions 1, pay attention to the technical performance of the drainage board, should be based on design requirements for each batch of products approaching the site inspection and inspection before construction. 2. Before the construction, check the geological data and make necessary penetrating (exploration) inspections in the area where the drainage holes are arranged to avoid underground obstacles when the drainage holes are applied. (The depth of the probe hole should not exceed the design hole depth 60CM). 3, when the collision with the underground obstacles can not continue to enter or tilt the hole (above the allowable deviation), you should discard the hole and extubate the shift (about 45CM or so), re-play drainage holes. 4, the drainage hole of the casting process to use fixed-load vibration injection method, has been hit to the depth of the design requirements, does not allow hammer slamming. 5, Drainage board during the shipment and storage, it is necessary to pack a thick protective layer, storage at the construction site should pay attention to sunscreen and mud, dust pollution or other objects collision damage. 6. When the drainage board is inserted and inserted, it should be noted whether it is actually sent into the soil during the insertion, or when the pipe (mandrel) is extubated, the drainage board is brought back up. Always pay attention to the consumption of plastic plates in the roll (or use an automatic recording device). 7. Set an appropriate pre-pressure sinking observation point, pay attention to the amount of compression and its uniformity. 8. It is necessary to implement technical specifications for the temporary use of electricity on the construction site to avoid accidents. Plastic drainage board price The price of plastic drains is generally around RMB 8.60/sq.m., and the specific price is based on the quotation of the merchant. Editor's summary: The above is the introduction of the plastic drainage board construction process and precautions, and hope to help friends who have this need! For more information, please continue to pay attention to our website, follow-up will show more exciting content. You can also purchase more of your favorite products on Qijia Mall! 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