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120results about How to "Prevent water penetration" patented technology

Earth pressure balance type shield long-distance lake-crossing construction technology

The invention provides an earth pressure balance type shield long-distance lake-crossing construction technology, which is characterized by comprising the following technological processes that: (1) before the lake crossing, equipment such as a shield tunneling machine cutterhead, a cutter, a grouting system, a sealing system, a thrust jack and a monitoring system are carefully inspected; (2) an earth pressure value is reasonably set, and the volume of excavated earth is strictly controlled; (3) the thrust speed is reduced, and the total thrust is controlled; (4) a shield posture is regulated, and the number of deviation correcting times and the deviation correcting quantity are reduced; (5) the slurry mixing ratio is optimized, and the grouting quantity and the grouting pressure are reasonably set; (6) water leakageat the shield tail is strictly prevented; (7) the construction quality is enhanced, and the tunnel self-waterproof capability is improved; (8) earth body improvement is performed; (9) secondary grouting supplementation is performed; (10) anti-drag slurry is injected; (11) after the shield crosses the lake bottom, the lake bottom in the interval influence range is subjected to radial grouting for reinforcement; and (12) the communication smoothness of the tunnel and the ground is ensured. The excessive lake bottom sedimentation is avoided, and the influence of accidents such as spewing or large-area collapse on the engineering safety and the environment safety is prevented.
Owner:BEIJING NO 4 MUNICIPAL CONSTR ENG +1

Mounting method with detachable rubber water stop mounted inside

The invention discloses a mounting method for an in-built detachable rubber water stop tie, mainly comprising the following steps: fixing a bottom steel plate respectively to the concrete at the two sides of a settlement joint via expansion bolt mechanisms or in the way of welding the steel plate with the inner reinforcing steel bars of the concrete; blocking the gap between the bottom steel plate and the concrete with epoxide resin slip-casting; coating polysulfide rubber on the surface of the settlement joint and the surface of the bottom steel plate; mounting the rubber water stop tie on the bottom steel plate; mounting an upper steel pressure plate and fixing the plate with the rubber water stop tie. The bottom steel plate can be fixed by means of chiseling the concrete until the reinforcing steel bars are exposed and then welding the bottom steel plate to the reinforcing steel bars, or of punching the concrete without reinforcing steel bars, injecting epoxide resin into the punched holes, fixing the expansion bolts in the holes, welding the bottom steel plate to the expansion bolts and at last welding all gaps between the expansion bolts and the bottom steel plate. The mounting method for an in-built detachable rubber water stop tie of the invention has good effect on preventing water seepage and is reliable in mounting the rubber water stop tie, and the mounted rubber water stop tie is easy to replace.
Owner:SHANGHAI RES INST OF BUILDING SCI CO LTD
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