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1、地下防水工程施工方案與施工工藝Hangzhou fortune financial centerI. brief introduction to engineeringZhejiang fortune financial center from the East and West building two building, West building has 55 floors, 258 meters high: East Building 37 floor, 188 meters high, the total construction area of about 210 thousand2、 square meters, of which the ground floor area of about 170 thousand square meters, underground construction area of about 40 thousand square meters, is a set of a smart office and commercial integrated building, and there is a large underground parking garage Waterproof project recommended by our c3、ompany, the use of two layers of 2.0mm thick APF-405 self-adhesive waterproof roll waterproof. The first layer is wet paving, and the second layer is directly attached to the first layerTwo, key and difficult pointsThis project is located in the Qian Tang River, underground water level is high, the 4、basement buried deep (12M), the construction operation space is small, the narrowest construction persormel only sideways through the underground waterproof requirements, (level of water), within a short period of time, the seco nd half of the year (started in December) and seasonal construction, wi5、th three and the subway connecting walkway in the basement, the side wall around -8M at nearly 200 supporting beam and the side wall of the corm ection, connections to be processing factors are put forward higher requirements on the quality of construction.Three 、 construction plan and technical mea6、suresSection 1 construction preparation1. Equipment preparationA) construction tools to clean up the waterproof base: broom, shovel, hammer, chisel steel etcB) polymer mortar batching tools: shovels, buckets, mixing drums, etcC) construction tools tiles: paper knife, tape, rolling brush, scraper, tr7、owel etc.2, artificial preparationA) in order to ensure the quality, waterproof works must be carried out by professional waterproof team;B) waterproof construction, with 6 people in one group.Second sections of concrete construction process1 、 construction process:Repair and clean-up grassroots (pr8、imary approval) and preparation of polymer cement mortar, polymer cement mortar, scraping node (additional enhancement layer and construction joints and post pouring belt), paving the first APF-405 to edge paste, self-adhesive membrane brushing the first layer, the second layer APF-405 acceptance pa9、ving, brushing edge paste, self-adhesive membrane head, second layer, paste extruded plate acceptance protection layer and backfilling2, the specific construction process:Clean up the grass roots:With a homemade triangle shovel to the basement side wall surface for cement pimple eradication, honeyco10、mb, pitted, repaired with cement mortar To be a construction section (about 50M), after completion of the grass-roots level, after the acceptance of the general contractor, supervision, you can do the construction of the coil.Mixing polymer cement mortarPreparation of polymer cement mortar with 32. 11、5 r Portland cement, water cement ratio is 0.35 and the dosage of masterbatch polymer cement mortar for cement dosage of 10% (weight ratio) Use the electric mixer to mix the cement and masterbatch mixtureNode processingIn the construction of each node: basement floor, side wall corner, the supportin12、g beam and side wa 11 junction, the wall pipe mouth, construction joint, the back pouring belt, the roof cornet and so on, first make a layer of membrane reinforced layer.Coil cuttingThe basement side wall of this project is 12M high According to the requirement, 300mm is dug horizontally at the jun13、cture of the floor of the side wall, and the top of the roof is dug out at 200mm There is a support beam at -8M underground During construction, the whole side wall is divided into three sections, and the length of each section is about four meters The construction sequence is carried out in three s14、ections from the bottom up.Cement mortarScraping polymer mortar, first with the drum water, will be the construction of concrete surface water, so as not to dry the bond base polymer mortar and the membrane effect of excessive water loss Then the polymer mortar trowel uniform scraping to the side wa15、l1.The shop is stuck, self-adhesive membraneBy the end of the wall will roll down, with a knife cut in the isolation membrane, shave mortar wall covered with paving material, hand roll under the air out from the middle to both sides, in turn from top to bottom will roll out, compaction.When the seco16、nd coils are laid, the overlapping edges of the sheets to be laid shall be aligned, the first lap of the coil will be compacted, and the air shall be compacted from the lap of the two sides of the coil to the other side The lapped edge is rolled repeatedly with a small press roller.Sadly, lapWhen la17、pping, the lapping line shall be aligned, and the lap width shall be 60mm with a long edge and a short edge of 80mm.S, sealA construction section to be completed after the first coil construction, you can undertake lap lap sealing, sealing can be used 2 inches of small brush stick sticky PA special 18、sealant for brushing Required to achieve full seam, sealed tight9, the first waterproof layer acceptanceIn the closing sealing can be carried out after the completion of acceptance, acceptance, in the first 48 hours after the completion of the construction material, name1y second membrane constructi19、on.The second coil constructionThe second coils can be directly attached to the first layer of coil, and the upper and lower layers will be staggered by half width Wipe the surface of the first coil with a cloth before construction The paste process is the same as the first oneWhe n the seco nd laye20、r is paved and finished, the adhesive of the Extrusion board can be carried out after passing the inspection and acceptance. The Extrusion board is made of foam and double sided adhesive tape After the paste is finished, the backfill can be carried out3, matters needing attention:Before the construc21、tion of the waterproofing membrane, it must be re examined by the supervisor, and the waterproof construction can be carried out after passing the testThe elevation of wet laid process on the moisture content of high polymer mortar is too dry will cause excessive water loss, affect the membrane and 22、polymeric mortar bonding, easy to cause the hollowing phenomen on. Therefore, the construction process should pay attention to polymer mortar coated after scraping the surface of dry and wet conditions, found dry should be immediately wateringThird, the one-time batch of polymer mortar should not be23、 excessive, usually in order to make a paragraph as a good In order to ensure the bonding effect, the thickness of polymer mortar should not be less than 2. OmmFourth, backfill should be sent to nursing, found off the board or smashed should be immediately repaired, lest the backfill layer on waterproofing membrane damage, repair damaged sheet available