59results about How to "Does not affect the duration" patented technology

The invention discloses a second lining grouting-with-template mechanism for a full hydraulic trolley. The second lining grouting-with-template mechanism comprises a lining trolley shell, wherein three grouting exhaust holes are formed in the lining trolley shell; the three grouting exhaust holes comprise a first grouting exhaust hole, a second grouting exhaust hole and a third grouting exhaust hole, the first grouting exhaust hole is formed in the top of the lining trolley shell, and the second grouting exhaust hole and the third grouting exhaust hole are correspondingly formed in both sidesof the bottom of the lining trolley shell; and RPC grouting pipes are arranged inside the grouting exhaust holes, and template fixing flanges are arranged at the bottom of the lining trolley shell. According to a technology, the construction is convenient and reliable, and grouting during a lining construction period does not affect the overall construction period; and the RPC grouting pipes withtemplate grouting can start grouting after initial setting of concrete, and a lining cavity is fully compacted and the lining defects are repaired through higher grouting pressure.

The invention discloses a construction method of a basement roof polyvinyl chloride root thorn resistance waterproof roll. The construction method is characterized by comprising the steps of: (a) construction preparation; (b) base layer treatment of the root thorn resistance waterproof roll; (c) construction of a reinforced additional layer in a node; (d) large surface construction of the polyvinyl chloride root thorn resistance waterproof roll; (e) head shrinkage treatment of the polyvinyl chloride root thorn resistance waterproof roll; and (f) cleaning, checking and acceptance of the polyvinyl chloride root thorn resistance waterproof roll. The construction method of the basement roof polyvinyl chloride root thorn resistance waterproof roll has the advantages of reasonable design and simple operation in production of the additional layer of the polyvinyl chloride root thorn resistance waterproof roll, no influence on construction period, lower investment, safe and reliable engineering quality, improvement of once acceptance pass percent, in particular prominent improvement of root thorn and water resistant in the node and elimination of subsequent node leakage hidden danger of a basement roof, and wide promotion and application prospect.

The invention relates to the field of building foundations, in particular to a method for dredging a soft foundation by dredger fill and reinforcement. The method includes: a, zoning for dredger fill; b, forming a primary drainage system; and c, performing layered and zonal filling and reinforcement. The method is characterized in that in zoning for dredger fill, each filling unit (11) is 20000m<2>-50000m<2> in area; in formation of the primary drainage system, digging crisscross blind ditches (31) on the surface of the filling unit (11), and laying corrugated filter pipes (32) and drain boards (33) on the surface for the filling unit (11); and in layered zonal filling and reinforcement, filling the filling area (1) level by level, and reinforcing with all levels of drainage networks. The method is convenient in construction, short in construction period, effective in foundation treatment and low in construction cost.

The invention relates to the design and synthesis of a poly carboxylic acid water reducing agent, the coagulating time of which can be controlled. The poly carboxylic acid water reducing agent is prepared by co-polymerize the following three monomers in water: the monomer a occupying 30 to 70 percent and indicated by a general expression 1, the monomer b occupying 10 to 50 percent and indicated by the general expression 2, and the monomer c occupying 10 to 40 percent and indicated by the general expression 3. The coagulating time is controlled by the monomer a which is made by condensing maleic anhydride and polyoxyethylene monoalkyl ether. The length of a polyoxyethylene monoalkyl ether chain controls the change of the coagulating time: the longer the chain, the shorter the coagulating time is; and the shorter the chain is, the longer the coagulating time is. The monomer a does not contain inhibitive substances in the process of synthesis, therefore, the water reducing agent is easy to be controlled in the coagulating process. The poly carboxylic acid water reducing agent is suitable for the construction of concrete under different temperature conditions: under higher temperature, the water reducing agent with longer coagulating time can be adopted, and under lower temperature, the water reducing agent with shorter coagulating time can be adopted. The poly carboxylic acid water reducing agent has good adaptability to cement and admixtures and has the advantages of low mixing quantity, good slump constant hold facility and water segregation resistance, and the like.