42results about How to "Guarantee the quality of plugging" patented technology

The invention discloses a method for calking an exploratory hole by intermittent high-pressure rotary jet grouting, which comprises the following steps: (a) determining the depth of the exploratory hole, the soil quality and the thickness of various soil layers of the exploratory hole, and the groundwater level burial depth; (b) determining the position of confined aquifer and the position with severe collapse in the exploratory hole as reinforced regions, and taking the position positioned outside the reinforced regions in the exploratory hole as a backfill air-drying clay mud ball region; and (c) treating the reinforced regions and the backfill air-drying clay mud ball region determined in the step (b) from the bottom to the top of the exploratory hole respectively until the exploratory hole is calked to the ground surface. The method adopts rotary jet grouting on confined aquifer roof plates exposed by the exploratory hole and the regions with severe collapse and still adopts a calking method of clay ball backfill compaction in other regions, so that the method can guarantee the calking quality, avoid the water burst phenomenon, and greatly save the engineering manufacturing cost.

The invention provides a device and method for joint treatment between a vertical structure and a horizontal structure and relates to the technical field of site preparation of building materials or building components. The problem that in existing reverse construction method gradation pouring cylinder construction, a joint at the position of a junction surface between a beam plate and a cylinder is difficult to process, and engineering quality is influenced is solved. The joint treatment device comprises an annular formwork module capable of densely covering the outer side of the joint, at least one grouting pipe and a slurry outlet pipe, wherein the at least one grouting pipe and the slurry outlet pipe are respectively arranged on the annular formwork module. The grouting pipes and the slurry outlet pipe penetrate through and are fixedly connected to a side wall of the annular formwork module. The joint treatment method comprises a first step of providing the joint treatment device; a second step of clearing the outer surface of the vertical structure and blocking the edge of the joint; a third step of mounting the joint treatment device, assembling the annular formwork module to enable annular formwork module to tightly wrap the joint, and enabling one end of the grouting pipe and one end of the slurry outlet pipe which penetrate through the annular formwork module to be towards a cavity where the joint is located; and a fourth step of injecting concrete through the grouting pipe to block the joint.

The invention discloses a plugging method for a dewatering well in a foundation pit. The plugging method comprises the following steps that S1, the position of the dewatering well is selected, and a steel pipe is inserted to serve as the well wall of the dewatering well; S2, a water stop ring is welded to the neck of the steel pipe, and a connecting ring is welded to the top of the steel pipe; S3, a waterproof coiled material is arranged on the outer wall of the steel pipe and extends from the well bottom to the position below the water stop ring; S4, a water stop copper bar clamp is arranged below the water stop ring and used for clamping the waterproof coiled material; S5, bottom plates are laid on the two sides of the foundation pit and the two sides of the dewatering well, reserved plugging positions are arranged on the bottom plates, and steel pipes are arranged in the reserved plugging positions; S6, water pumps are placed in the steel pipes, water is cooled to the position 50cm below the lowest point of the foundation pit, and after a basement structure is completed, dewatering is stopped; S7, the water pumps are withdrawn, the dewatering well is filled with gravel, and a well lid with holes is additionally sealed on the connecting ring; and S8, grouting is conducted along the holes in the well lid. Underground confined water is plugged while pressure relief is conducted, the plugging quality is ensured, multiple waterproof measures are taken, and leakage of the structural bottom plates is avoided.

The invention discloses a construction method for split bolt hole plugging. The construction method comprises the following steps of: S1: cleaning a hole: cleaning a split bolt hole on a shear wall, i.e., utilizing a hair brush to remove laitance and residues in the hole, and removing residual mortar around the hole to keep the inner wall of each bolt hole clean; and S2: removing a PVC (polyvinylchloride) pipe: adopting chiseling and expanding processing on the end part of the hole, removing the exposed PVC pipe by a scraper knife, and after cleaning is finished, cleaning the residual mortararound the hole by the hairbrush. According to the construction method, through a way that an antiseptic wooden plug and inner expansive grout are cooperated for plugging, a traditional end grout andinternal foaming plugging technology is replaced, hole plugging quality is guaranteed, the problems that cracking and falling are likely to happen can be effectively reduced, a hidden danger that an exterior wall is likely to generate water seepage in a later stage can be reduced, and construction quality is improved. In a plugging construction process, a special machine is adopted to replace a manual foaming way, so that construction efficiency is high, construction speed is high, and meanwhile, a manpower burden is lightened.

The invention provides a method for sealing high-rise shear wall external wall upstream face pulling screw holes. PVC plastic conical plugs are additionally arranged, the PVC plastic conical plugs areused in the external wall shear wall pulling screw holes and inserted into the pulling screw external holes for sealing, then a foaming filler is injected from the positions, located on the inner side of a shear wall, of the pulling screw holes, and then the shear wall pulling screw holes are sealed by means of combination of inside and outside. It is ensured that the outer ends of the pulling screw holes are tightly filled with the tail ends of the PVC plastic conical plugs and the tail ends of the PVC plastic conical plugs are completely attached to a shear wall external wall, and meanwhile, conical plug anti-slip layers can effectively adhere to cement mortar. The method for sealing the high-rise shear wall external wall upstream face pulling screw holes is simple to implement and convenient to operate, leakage situation due to the high-rise external wall is greatly reduced, the maintenance cost is reduced, the construction quality is improved, and the method solves the problem ofexternal wall seepage due to poor sealing of the pulling screw holes, rough and uneven external wall ends of the pulling screw holes or aging of foaming materials caused by a conventional screw hole sealing method.

The invention discloses an ultralow-temperature refrigerator electric cabinet provided with a patch-cord misplug prevention function. A relay, a transformer, an alternating-current contact and a computer board are mounted in an electric cabinet body, and are connected through a plurality of internal connection wires; a plurality of external connection wires are arranged inside the electric cabinet body, and extend out from the electric cabinet body; and the external connection wires are connected with a quick plug and are distinguished by using wires with different colors. Rapid plugging for assembly line production is realized by matching the external connection wires with the rapid plugging, and the plugging quality is ensured. Meanwhile, the wires are distinguished by using the different colors, so that the production plugging, the future maintenance, and the wire examination in the maintenance are more convenient.

The invention provides a special mold for plugging fireproof mud in cable holes, and relates to the field of electrical equipment. The special mold comprises a left half ring and a right half ring, wherein the left half ring and the right half ring are connected together; a rotating ring is arranged on a cylinder body surrounded by the left half ring and the right half ring; a plurality of telescopic fixing mechanisms are annularly arranged on the rotating ring; and a heating plugging mechanism is mounted on the cylinder body. According to the special mold, the fireproof mud plugging process is changed from manually repeated splicing into mechanical auxiliary plugging forming, the process is fast and convenient, the thickness of the fireproof mud is consistent, the technological level is improved, the plugging quality of holes is guaranteed, the problems that the fireproof mud is difficult to extend at low temperature and the manual splicing process is unsightly are thoroughly solved,and the past operation process is changed. The short circuit accidents caused by fire and small animals are completely eradicated.

The invention discloses a thin-walled concrete tie screw waterstop structure, comprising a plastic bellows arranged in a thin-walled concrete tie screw hole; the part of the tie screw hole in front of the plastic bellows is a front reamed hole, the part of the tie screw hole in rear of the plastic bellows is provided with a rear reamed hole, the tail end of the front reamed hole is provided with a water-swellable waterstop plug, and all the front reamed hole, the rear reamed hole and the plastic bellows are sealed with grout. The invention also discloses a construction method of the thin-walled concrete tie screw waterstop structure; the construction method comprises the steps of first, mounting a plastic bellows sleeve and tie screws; second, pouring, and removing forms; third, reaming; fourth, mounting the water-swellable waterstop plug; fifth, filling with grout; sixth, adding a water-swellable waterstop lug to the backwater side in case of underground water. The thin-walled concrete tie screw waterstop structure has high hydraulic pressure resistance, high structural tightness and durability, and good convenience of construction.

The invention relates to a radio frequency coaxial connector fixing device, which comprises a fixing plug and a columnar fixing socket. The fixing plug includes an insulating tube which sleeves a radio frequency coaxial connector. Multiple elastic pieces are arranged outside the middle section of the insulating tube. The angle between the lengthwise direction of the elastic pieces and the lengthwise direction of the insulating tube is alpha, which is an acute angle. Multiple raised plates are arranged at the rear section of the insulating tube. A raised block is arranged on the outer side of the tail end of each raised plate. Hole channels for installing the radio frequency coaxial connector are arranged at the head end of the fixing socket. Each hole channel includes a first installation hole for entry and exit of the raised blocks, a second installation hole for entry and exit of the raised plates and a third installation hole adapting to the elastic pieces. A fourth installation hole is arranged at the tail end of the fixing socket. The radio frequency coaxial connector fixing device is simple in structure and easy to use. After the fixing plug and the fixing socket are connected by plugging, the fixing plug and the fixing socket are locked. The fixing plug and the fixing socket cannot be easily separated, and the quality of plugging is high.

The invention relates to the technical field of metro construction, particularly to a shield interval piston vent backfilling and station passing construction method. The shield interval piston vent backfilling and station passing construction method comprises, after bottom plates of an interval piston vent are constructed, arranging steel supports circumferentially outside a shield range, backfilling modified soil, arranging reinforced concrete sealing plates into the backfilled soil, backfilling soil to reach the underground water level and the like to increase the support stiffness inside the piston vent, balance pressure of water and soil inside and outside pits and ensure structural stability of a foundation pit support; when a shield tunneling machine is passing by, strengthening synchronous grouting for secondary grouting of an out-tunnel sixth ring, and re-grouting the seepage parts of the foundation pit support during backfilled water excavation to seal joints of the foundation pit support and the seams between a tunnel entrance and the foundation pit support and further to ensure subsequent construction safety. The shield interval piston vent backfilling and station passing construction method effectively solves the contradiction between limited construction periods and lagged piston vent construction, avoids the risks of multiple starting and receiving the shield tunneling machine passing through the piston vent, and has the advantages of being reasonable in process, safe, reliable, capable of avoiding stopping of the shield tunneling machine and effectively shortening the construction period and the like.