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556results about How to "Avoid voids" patented technology

Prefabricated reinforced concrete hollow template internally provided with cross holes and molding and forming device thereof

The invention relates to a prefabricated reinforced concrete hollow template internally provided with cross holes and a molding and forming device of the prefabricated reinforced concrete hollow template. The hollow template is internally provided with longitudinal through holes with round cross sections along the length direction and latitudinal through holes with square cross sections along the width direction, wherein the longitudinal through holes are arrayed parallel one another, the latitudinal through holes are also arrayed parallel one another, and the diameter of each longitudinal through hole is less than the length of the side of each latitudinal through hole. Two large surfaces of the hollow template are flat surfaces formed by molding. A casting mold of the molding and forming device is of a vertical type and provided with one or more mold cavities; each mold cavity is surrounded by a front face plate, a rear face plate, a left side plate and a right side plate; a core tube frame or upper side plate capable of fixing a vertical core tube is arranged on the upper part or above each mold cavity; and the left side plate, the right side plate and the upper side plate are provided with a plurality of horizontal holes and vertical holes respectively. Each surface of the hollow template processed by using the molding and forming device is flat without being polished and subjected to similar treatment. The hollow template is high in strength and good in quality, can be directly used for the construction of a load-bearing wall with few procedures in a short time and can ensure that the load-bearing wall is not easy to shrink and crack.
Owner:ARCHITECTURAL DESIGN & RES INST OF TSINGHUA UNIV

Steel structure and foundation pre-burying connection structure and construction method

The invention relates to a steel structure and foundation pre-burying connection structure, which is characterized in that the pre-burying connection structure is integrally cast by a prefabricated component and a foundation bottom plate, the prefabricated component is a steel bar concrete connecting block with a connecting steel plate embedded in the upper surface, the periphery of the steel bar concrete connecting block is provided with reserved steel bars connected with steel bars arranged in a foundation, a plurality of steel structure connecting screw rods penetrating through the prefabricated component are arranged in a range of the connecting steel plate, and the lower parts of the connecting screw rods extend into the foundation. The connecting structure provided by the invention has the advantages that the connection intensity of the steel structure and the foundation can be effectively improved, the problems of bottom hollowing and the like due to non-compact casting of the bottom concrete of the traditional pre-burying component and nonuniform deformation of the steel plate and the concrete can be solved, and better technical and economic benefits are realized. The invention also discloses a construction method of the pre-burying connecting structure.
Owner:瑞洲建设集团有限公司

Transistor forming method

The invention provides a transistor forming method. The transistor forming method is characterized in that a substrate can be provided; dummy grid layers can be formed on the surface of the substrate, and the surfaces of the side walls of the dummy grid layers are provided with side walls; first dielectric layers are formed on the substrate and the surfaces of the side walls, and the surfaces of the first dielectric layers are lower than the surfaces of the dummy grid layers; the side walls higher than the surfaces of the first dielectric layers can be removed, and the parts of the surfaces of the side walls of the dummy grid layers can be exposed, and first openings can be formed in the first dielectric layers between adjacent dummy grid layers and the surfaces of the side walls; second dielectric layers are formed in the first openings, and the surfaces of the second dielectric layers are aligned with the surfaces of the dummy grid layers, and the densities of the materials of the second dielectric layers are higher than the densities of the materials of the first dielectric layers; the dummy grid layers can be removed, and second openings can be formed in the second dielectric layers and the first dielectric layers; the etching of the side walls of the second dielectric layers of the second openings can be carried out, and then the sizes of the top parts of the second openings can be enlarged; grid layers can be formed in the second openings after the etching of the side walls of the second dielectric layers of the second openings. The performance of the formed transistors is stable, and the reliability can be improved.
Owner:SEMICON MFG INT (SHANGHAI) CORP

Anti-overturning reinforcement system for single-column pier bridges and mounting method

The invention provides an anti-overturning reinforcement system for single-column pier bridges, which comprises a steel structure support, a steel connecting base, and rigid tie rods; the steel structure support comprises two semicircular hoops with cantilevers, and the surface, which is in contact with a pier, of each semicircular hoop is provided with reserved holes for the mounting of anchor bolts at intervals; the external surfaces of the semicircular hoops are provided with axial reinforcing ribs; the two semicircular hoops are connected through first high-strength bolts to hoop both sides of the pier, and the semicircular hoops and the cantilevers are of an integrated structure; one end, which is far from the hoop, of each cantilever is provided with a vertically through mounting through hole; the steel connecting base is fixed on the bottom of a bridge, the center of the steel connecting base and the center of the through hole are on the same vertical line, and both ends of eachrigid tie rod are respectively fixedly connected to the steel structure support and the steel connecting base. The invention can effectively enhance the anti-overturning performance of a single-column pier bridge, the structure is simple, stress is clear, construction is convenient, the anti-overturning reinforcement system has relatively good economical efficiency and appearance, and the invention is suitable for popularization and application in the field of bridge reinforcement.
Owner:HUATIAN ENG & TECH CORP MCC

Bridge sliding clamping plate hook lock type box girder overturning prevention mechanism

InactiveCN103510460ASolve the hidden dangers of overturning accidentsSolve the problem of lateral overturning stabilityBridge structural detailsBridge erection/assemblySocial benefitsEconomic benefits
The invention discloses a bridge sliding clamping plate hook lock type box girder overturning prevention mechanism and a construction method thereof. The bridge sliding clamping plate hook lock type box girder overturning prevention mechanism comprises a box girder and a capping beam. The box girder is characterized in that a U-shaped box girder sliding clamping plate hook lock assembly is arranged on the bottom face of the box girder in an anchoring mode. The capping beam is characterized in that a capping beam sliding clamping plate hook lock assembly is anchored on the side face of the capping beam. The two assemblies are locked in a sliding mode, and additional stress generated by the box girder and a bridge pier due to stretching of the box girder is removed. When the box girder has an overturning trend, the two assemblies are assembled together in a hook lock mode, and thus the box girder can be prevented from overturning. After the mechanism is mounted on a continuous box girder bridge, the overturning problem of the box girder can be solved. The bridge sliding clamping plate hook lock type box girder overturning prevention mechanism has the advantages that the structure is simple and reasonable, main beam stretching is released, a support can be replaced conveniently, the usability is good, and manufacturing cost is low. The mechanism can be machined (welding or casting) in a factory in a concentrated mode, and the construction period is shortened. Huge investment is saved for China, remarkable economic benefits are obtained, meanwhile, huge social benefits are achieved, and the negative effect of bridge overturning on the society is removed.
Owner:孙超

Repair method of vehicle bump pavement of bridgehead

The invention relates to a repair method of the vehicle bump pavement of a bridgehead. The repair method comprises the following steps: detecting a disengaging position in an approach slab of a damaged bridge by a detection radar, marking the positions of grouting holes I on the surface of the approach slab and drilling, wherein the grouting holes I reach the hard layer and are distributed in an array manner, the center distance between the adjacent grouting holes I is 10-20 cm, and the disengaging position is enabled to fall into the array range; enabling grouting holes II to penetrate the soft layer and to be crossed with the grouting holes I, and arranging one-way valves for exhausting at two ends of the grouting holes II; grouting the grouting holes I and detecting the slurry filling conditions of the disengaging position, the grouting holes I and the grouting holes II in time by a three-dimensional detection radar, and stopping the grouting when the disengaging position, the grouting holes I and the grouting holes II are filled with slurry; detecting and rechecking the filled part by the detection radar after grouting stopping, and drilling and grouting parts which are not filled with slurry again. The method solves the problem of the difference between settling velocities of the hard layer and the soft layer.
Owner:JIANGSU DINGTAI ENG MATERIAL

Resin hole-plugging method for large-aperture back-drilled hole

ActiveCN110831336AAvoid voidsSolve the problem of plug holePrinted circuit manufactureGrindingDrill hole
The invention discloses a resin hole-plugging method for a large-aperture back-drilled hole, and the method comprises the following steps: drilling a through hole on a production plate, wherein one surface of the production plate is a back-drilled surface, and the other surface is a non-back-drilled surface; metalizing the through hole through copper deposition and full-board electroplating in sequence; performing back drilling at the position, corresponding to the metallized through hole, in the back-drilled surface through a depth-controlled drilling method, and forming a stepped back-drilled hole, wherein the hole diameter of the back-drilled part is larger than that of the through hole; filling resin in the back-drilled hole in a vertical vacuum hole-plugging manner and performing curing; filling resin into the back-drilled hole for the second time in a horizontal vacuum hole-plugging manner and curing; and removing the resin protruding out of the plate surface through an abrasivebelt grinding plate. According to the method, the quality problems that a conventional resin hole-plugging process cannot be used for manufacturing or hole plugging cavities, holes are not full, and hole openings are sunken are solved, full resin hole plugging is ensured, and hole opening sunken parts are less than 30 microns.
Owner:珠海崇达电路技术有限公司 +1

Pre-warning method for preventing tunnel vault concrete from disengaging

The invention relates to a pre-warning method for preventing tunnel vault concrete from disengaging. An anti-disengaging pre-warning device and a tunnel second lining trolley are included. The anti-disengaging pre-warning device comprises pressure contact induction devices, network cables, an electric switch box and an alarming system. The pre-warning method comprises the following steps that a, the pressure contact induction devices are mounted on a tunnel vault waterproof plate corresponding to the tunnel second lining trolley, and the pressure contact induction devices, the electric switchbox and the alarming system are connected to form the anti-disengaging pre-warning device through the network cables; b, pouring of the second lining concrete is conducted by using the tunnel second lining trolley; and c, along with rising of a pouring face of the second lining concrete in the pouring process, the concrete is in contact with the pressure contact induction devices on the tunnel vault waterproof plate, the corresponding alarming system gives out an alarm, and it is proved that the second lining vault concrete is poured compactly. The pre-warning method can well avoid the existing phenomena of disengaging and hollow voids caused by incompact grouting of the tunnel second lining vault concrete.
Owner:CHINA TIESIJU CIVIL ENG GRP CO LTD +1
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