2results about How to "Does not affect structural safety" patented technology

The present application belongs to the technical field of sealing well of precipitation well, and discloses a sealing well method of precipitation well, which utilizes a sealing member to isolate the upper and lower well pipes, realizes feeding and filling in the lower well pipe of the sealing member, pressure cement slurry filling in the upper well pipe of the sealing member, and waterproof material is used to strengthen waterproof, and then fine stone concrete or grouting material is poured, and after the sealing plate is closed, a rigid water stop wing ring is arranged inside, and fine stone concrete is poured to form multiple waterproof measures; the sealing member is used to feed and fill the well pipe, which can weaken the effect of groundwater to the greatest extent, and avoids the problems of cement and fine material return caused by groundwater flushing in the prior art. The present application is suitable for sealing well of precipitation well under complex conditions of rich groundwater and high water pressure, and has the advantages of fast sealing well effect, small work load, short cycle, no influence on the surrounding environment, no influence on the safety of underground building structure, flexible and convenient operation, and saved construction period and cost.

The utility model discloses a concrete prefabricated part, which belongs to the technical field of prefabricated parts and comprises a first prefabricated part and a second prefabricated part, the second prefabricated part is arranged on one side of the first prefabricated part, and two groups of splicing mechanisms are arranged between opposite surfaces of the first prefabricated part and the second prefabricated part. The splicing mechanism comprises plugging cover plates, seam filling mold openings and anti-disengaging clamping plates, the two plugging cover plates are fixed to the end face of the first prefabricated plate and the end face of the second prefabricated plate correspondingly, the seam filling mold openings are formed in the plugging cover plates, and the anti-disengaging clamping plates are slidably connected to the interiors of the plugging cover plates; by means of the splicing mechanism, the first prefabricated slab and the second prefabricated slab can be quickly locked after being in butt joint through cooperation of the anti-disengaging clamping plate and the anti-disengaging clamping groove, dependence on an additional auxiliary supporting device is reduced, the installation efficiency is improved, meanwhile, relative displacement between the prefabricated slabs is effectively prevented, the overall stability of the structure is enhanced, and the service life of the prefabricated slabs is prolonged. And the risk of structural damage caused by loose connection is reduced.