Datong sewers plugging

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Project Overview sewer leakage control program, after Jiangsu Nantong municipal sewage treatment works completed in the main building renovation project, due to uneven foundation settlement and displacement, the cross joints (joints) sewer pipe parts of a large amount of leaking joints, Construction can not make the next step, it is necessary to take immediate measures to quickly and effectively waterproof plugging the sewage pipeline project achieve watertight construction requirements to meet the next construction and use requirements. Second, the programming based on a national standard GBJ108-87 "underground works waterproof technical specifications" two national standards GBJ208-83 "underground works waterproof construction and acceptance of" 3, waterproof plugging project costing 4, "waterproofing Atlas "5, the existing water projects nationwide fixed compilation 6, China Association for Engineering Construction Standardization standard CECS117: 2000" accumulator design objects and structures Deformation order "7, national building materials industry standard JC483-92" polysulfide sealant "8, the Party concerned Three technical quality and construction requirements, expansion joints (Deformation) a leakage control program, expansion joints for leaks in underground engineering analysis joints (Deformation) is easy to produce special parts leaking, leaking main reasons are the following generation areas: (1) underground engineering deformation is too large, exceeding the allowable deformation range, mainly based on thermal expansion and contraction and differential settlement. (2) rapid displacement sewers Deformation generated in the construction process, causing damage to the rubber water stop. (3) has not reached due to dense extent pouring concrete, resulting in a loose, doghole, cellular and other phenomena, forming a leakage of water channels. (4) Rubber Sealing incomplete curing, resulting in aging fracture after a long time, or in the construction of drill rod chisel is bad. Once the leak joints that show the entire water stop failure, it must conduct a comprehensive whole perimeter seam leakage control to be effective. 2, waterproof plugging leaks cause analysis program based on the above, this program uses the first waterproof plugging Grouting, sewage pipelines flexible polymer sealant to protect the final rigid protection measures plugging specific program diagram is as follows: 1, grouting plugging Wang 2, PE foam strip (double) 3, rapid plugging agent mortar (thickness 40 ~ 50mm) 4, PG321 two-component polysulfide (thickness 20mm) 5, 6 compression sealants, expansion seam - side concrete waterproof plugging program are as follows: (1) removal of the grass-roots: the original material in the joints and remove impurities to a predetermined depth (typically 7 ~ 10cm deep), rinse with water. (2) fixed grouting channel and grouting pipe: mixing over 32.5 ordinary portland cement grouting channel -PE fixed foam strips with rapid plugging agent (liquid, powder may be), PE foam strip at a fixed time, each separated by a grouting pipe buried about 50cm. Grouting pipe using & Oslash; 10 ~ 13mm of pressure rubber hoses, both as a water pipe in the pipe and as grouting works. (3) grouting plugging: Start Note polymer grouting material from the bottom - plugging Wang grouting, grouting pressure control between 0.3 ~ 0.5MPa, to be next to a hole grouting stop oozing slurry grouting close the valve, and then from another hole grouting, followed sequentially performed after grouting is completed until all leaks were observed, as there are some places you can add leakage from a hole grouting until recently no leakage so far. (4) cut grouting pipe: 24h after grouting confirm no leakage under the circumstances, cut off all grouting pipe, with a blowtorch drying interface. (5) to clean up the interface: Use a wire brush to clean the skin of impurities and miscellaneous debris generated due blowtorch baking. (6) Construction of a flexible material: 50 ~ 60mm thick PG321 construction component polysulfide sealant in the joints, T-posted outside width 300mm, 20mm thick two-component polysulfide sealant. (7) as a protective layer: After the polysulfide sealant cured sealant with compression as the last semi-rigid protective layer. Fourth, cracks leak governance programs and projects in accordance with the requirements of the actual situation of the Party, you first need to crack grouting waterproof plugging leakage area, then two-component polysulfide sealant for flexible sealing layer, compressive seal again agents rigid waterproof protective layer construction. Plus flexible waterproof rigid protective waterproof plugging program is based on a national "underground works waterproof technical specifications" of requirements. Waterproof plugging, structural reinforcement construction procedures are as follows: 1, the first construction joints chisel a deep 70mm, 60mm width of a "V" seam, rinse with water. 2. Fixed grouting and grouting works fast channel blocking agent, and above 32.5 ordinary portland cement grouting channel fixed PE foam strip, at a fixed PE foam strip, every one about 50cm buried pipe grouting, injection slurry pipe using & Oslash; 10 ~ 13mm of pressure rubber hose, the tube has been used as water pipes and as grouting works. 3, sealing and grouting plugging polysulfide flexible waterproof seal from the side of the start of construction of polymer injection grouting material - plugging Wang grouting, grouting pressure control between 0.3 ~ 0.5MPa, to be next to a grouting holes can stop take slurry grouting, and close the valve and then plugging the hole grouting from another, followed by the order, until all leaks observed grouting is completed, there are still some places such as leakage from the nearest A supplementary grouting hole until no leakage so far. Cut pipe before making PG321 component polysulfide sealant construction. 4, rigid protective layer construction when grouting waterproof plugging cracks will not produce leaks, but the strength of the structure has not been improved compression sealant must be used together with various additives, active agents, additives made a kinds of high-strength, low viscosity structural reinforcement material, when the material is cured and after so can produce structural strength of greater than C30, so that the upper and lower concrete panels together into a whole, to achieve the overall long-term goal. Fifth, a large area (cell) a leakage control program, the surface layer method: for large area leakage of water governance structures. Under normal circumstances, a large area of ??the basement seepage water treatment can not be carried out the positive side, only in the dorsal surface treatment, it is in pre-construction, drainage should be cited, in order to prevent new surface layer is made of waterproof pressurized flush bad. Surface layer of concrete practice of law: Choose the amount of leakage centralized location, open hole borehole water flow from the catheter. According to the amount of the size of the leak can be in one or multiple water pipe, can not find the leakage point, in the lower part of the wall water pipe. Then watertight material requirements in accordance with the site, a large area smear polymer cement mortar waterproof need stratification TROWELING, order plain water slurry - waterproof mortar - Waterproof prime pulp, last dialed tube shutoff. For concrete slight seepage, available compression sealant applied in the concrete surface with a scraper construction, general construction of 2 to 3 times, but not until the water film so far. For obvious leakage of water holes and cracks, holes and cracks leakage by water treatment method, one by one waterproofing. For the structure of the surface of the concrete basement, water pressure in the smaller less severe slow leakage of water (such as sweating, Yin wet, etc.) can be anti-scratch coating on the back surface of the water leakage grams, so that the surface layer of impermeable cover layer impermeable to play the role. Specific practices: the primary surface treatment is smooth, rugged place filled with cement mortar, flatten trowel, while removing the primary surface dust, oil, etc., in order to facilitate the waterproof layer bonded firmly. After completion of the above work and pass the inspection, you can use anti-leakage grams construction. 2, grouting method: In case of a large area basement water leakage, grouting method may also be treated, can be arranged according to the grouting holes in the structure of water leakage case, the distribution into a plum-shaped, triangular or a shape, and then grouting treatment to form a water curtain in the internal structure. In addition, also the use of "closed surface grouting" approach, which is to water down the tube, and then use the compressive sealant large hand side, to be waterproof coating strength to meet the requirements, from the water pipe as Grouting. Six holes, point infiltration, embedded parts, wall pipe leakage control program (a) holes, point infiltration leakage control method, plugging method: using inorganic material plugging directly plugged. Encountered hole smaller or larger holes but slow leakage of water pressure is not the case, waterproof plugging inorganic materials can be directly plugged. Operating procedures: According to leak water situation, find out the leakage point to the leakage point as the center of boreholes (diameter of 1 ~ 3cm, depth of 2 ~ 5cm), the hole wall and the base surface perpendicular as possible, and rinse with water, by plugging material twisted into the shape of a similar hole cone-shaped group, let it start to solidify at the rapid pressure inside the hole, holes in the wall to squeeze around the dense, so plugging holes in the wall material and the close integration is completed by plugging check no water leakage, you can use polymer cement mortar pressed to the wall flush with the board or. 2, under the control law: for large hole pressure gushing rapids or water leakage. Specific practices are: the surface layer and bonded Clear leaks hollowing false stones, then tick into the hole, depending on the depth of the water may be leaking. Spread a layer of gravel in the bottom of the cave, the cover layer of gravel and hole the same size or linoleum sheet metal, and on which to open a small hole in the hose inserted into the hole, the water flowing along the tube, then use quick-setting materials The water pipe around the hole once filled, to be plugging material begins to solidify, forced to squeeze cement plugging holes around the dense clay surface and below the surface structure is not less than 1.5cm, clogging completed and no leakage of water through the examination After allocating hose, plug the hole, and finally with a sealant layered compression plate surface wiping pressure to flush. Datong sewers plugging