45results about How to "Avoid risk of collapse" patented technology

The invention discloses an ultrahigh ultra-large open caisson and a construction method, and belongs to the technical field of municipal drainage, and aims to solve the problem that certain foundation pit collapse risk exists as an existing enclosure form of foundation pit construction is relatively high in cost and is long in construction period. The construction method for the ultrahigh ultra-large open caisson comprises the following steps of: firstly, arranging a waterproof curtain, a compaction grouting substrate and a cushion layer as preparatory measures, separately casting a first section of the open caisson and a second section of the open caisson in two steps until a complete open caisson structure is completed; then, performing open caisson construction; and finally, performing substrate concrete pouring. Through the construction method of manufacturing twice and performing open caisson construction once, a horizontal supporting system is saved, so that the foundation pit collapse risk is avoided; the open caisson is separately manufactured through two steps, so that the risk of a manufacturing process of manufacturing the ultrahigh ultra-large open caisson once is avoided, the construction period is shortened, and construction cost is reduced, and therefore, the popularization value is relatively high.

The invention relates to unsaturated polyester black backing varnish with high fillibility and a preparation method thereof. The black backing varnish is prepared from a main agent, a promoter, an initiator and a diluent according to a weight ratio of (90-110): (0.9-1.1): (1.1-1.3): (25-30), wherein the main agent is prepared from the following raw materials in parts by weight: 35-50 parts of unsaturated resin, 0.5-1 part of dispersant, 0.1-0.3 part of non-silicon flatting agent, 0.5-0.8 part of carbon black, 0.1-2 parts of zinc powder, 30-45 parts of talcum powder, 10-20 parts of styrene and 0.1-0.2 part of polymerization inhibitor; the promoter is cobalt naphthenate; the initiator is cyclohexanone peroxide; the diluent is styrene. The unsaturated polyester black backing varnish prepared by the preparation method disclosed by the invention not only has high fillibility and high hardness, but also is capable of improving the fullness of finishing coat, and no solvent is rest on the varnish films after the construction, so that the environmental tolerance of the construction is large.

The invention provides a high-flow precious metal channel, which comprises a molten glass mixed-flow stirring section, at least two molten glass heating; clarifying and cooling sections are connectedin parallel to one end of the molten glass mixed-flow stirring section, and a liquid supply tank is further communicated with the other end of the molten glass mixed-flow stirring section. The methodis mainly used for clarification and homogenization of large-flow high-temperature molten glass in the production process of 8.5-generation or higher-generation TFT glass, and bubble-free and stripe-free high-quality molten glass is provided for the subsequent float forming or overflow forming process.

The invention relates to the field of bank transactions, in particular to a transaction query method and device, electronic equipment and a readable computer storage medium. The transaction query method comprises the following steps: receiving a first query request of a target merchant; retrieving a query request set cached by the target merchant in a preset time period; if the cached query request set meets a set first condition, performing transaction query according to the first query request; and if the cached query request set does not meet the set first condition, caching the first queryrequest, and updating the cached query request set. Based on the scheme disclosed by the invention, the query request in the cache can be queried according to the set query frequency to control the query of the database, so that the risk of slow query or query system crash caused by query hotspots due to a large number of queries is avoided.

The invention discloses a damping device for light steel integrated housing. The damping device for the light steel integrated housing comprises a base; a vertical buffering mechanism is installed at the top of the base; a horizontal buffering mechanism is installed at the top of the vertical buffering mechanism; the vertical buffering mechanism comprises vertical buffering assemblies welded to the four corners of the top of the base; light steel keel supporting columns are installed at the four corners of the tops of the vertical buffering assemblies correspondingly; a first vertical buffering pipe is welded between the ends, close to each other, of two vertical buffering assemblies located on the same side of the base in a butt clamping and penetrating mode; and a second vertical buffering pipe is welded between the other ends of the two vertical buffering assemblies located on the two sides of the base in a butt clamping and penetrating mode. A control mechanism is arranged to be connected with the vertical buffer mechanism and the horizontal buffer mechanism, and when no severe external force is applied, hydraulic oil in a shell is blocked by a sealing plug, so that circulation of the hydraulic oil is prevented, fixing of the light steel keel supporting columns is achieved, and the housing can be prevented from shaking.

The invention belongs to the field of high-activity metakaolin preparation, and particularly relates to a flexibly-adjustable high-activity metakaolin preparation system and method. The flexibly-adjustable high-activity metakaolin preparation system comprises a suspension preheating system, wherein the suspension preheating system comprises multiple stages of cyclone preheaters, raw powder is subjected to preheating and gas-solid separation in the cyclone preheaters, and the raw powder having been subjected to multiple times of heat exchange and gas-solid separation enters a calcining furnace system from the penultimate-stage cyclone preheater of the suspension preheating system. According to the flexibly-adjustable high-activity metakaolin preparation system and method, the requirements of different industries for the color of a finished metakaolin product are fully considered, high-activity metakaolin is produced, and meanwhile the problems that a conventional metakaolin preparation system is high in energy consumption, small in processing capacity, difficult in product quality control and the like are solved.

A downward layered drift filling mining method for extremely-broken thick and large ore bodies comprises the steps of stope arrangement and mining preparation cutting, specifically, outside-vein slope ramps (1) communicated with roadways (7) of all stages are tunneled between adjacent middle sections perpendicular to a vein; the method comprises the following steps of: excavating a slope ramp outside a vein, excavating a segmented connection way (2) from the slope ramp outside the vein, excavating a segmented gate way (3) communicated with the segmented connection way, sequentially excavating two or more layered connection ways (6) from the segmented gate way, excavating a layered connection gate way (5) communicated with the layered connection ways, and excavating a stoping drift (10) from the layered connection gate way; an ore pass (4) is arranged in a layered connection gate way (5), a filling return air raise (12) is tunneled, a filling return air roadway (11) is tunneled at the upper part of the filling return air raise, and a current-stage haulage roadway (8) and an upper-stage haulage roadway (13) are respectively tunneled at the joints between the outside-vein ramp and the current-stage transverse drift (14) and between the outside-vein ramp and the upper-stage transverse drift (9); and blasting, ventilating a stope, stoping and filling a goaf. The tunneling and mining efficiency is improved, the mining safety is improved, and the loss and dilution rate of ore is effectively reduced.

The invention discloses a polymer grout injected earth-rock dam and a construction method thereof. The polymer grout injected earth-rock dam comprises rockfill, polymer grout injected rockfill and a face slab. A dam body is built with the rockfill, with the rockfill and a clay core wall or with the face slab and the rockfill by filling. Overall dam grouting or grouting on the upstream surface and the downstream surface of the dam body are performed during filling. The problems that conventional earth-rock dam allows no passage of water, accelerations at the top of the dam are high, the rockfill mass is easy to loosen and the like are solved, and the polymer grout injected earth-rock dam is simple in structure and convenient in construction, has evidently improved seismic stability, has wide application prospect and is an economical and practical dam.

The invention discloses an irrigation and draining brake which comprises a flashboard frame and a flashboard, wherein a water inlet through hole is formed in the flashboard frame. Guide grooves are formed in both sides of the flashboard frame. Both sides of the flashboard are contained in the guide grooves and can move along the guide grooves, positioning adjusting teeth are arranged on the inner wall of the guide grooves, and elastic clamping tongues which are matched with the positioning adjusting teeth are arranged on both sides of the flashboard. The irrigation and draining brake is fixed on an opening of a ridge, irrigation and draining work is controlled by moving the flashboard, and water level height can be adjusted. The irrigation and draining brake has the advantages of being convenient to use, safe and reliable.

The invention relates to a lower jacking fast installation type lifting platform. An assembly type steel structure foundation is fixed on a ground foundation on one side of an original bearing platform of a building in a spaced mode. A jacking system is fixedly installed at the upper end of the assembly type steel structure foundation. A plurality of standard knots are installed on the jacking system coaxially in the longitudinal direction in a stacked mode. The height of the upper ends of the standard knots is the same as that of the original bearing platform of the building. A lifting bearing frame is fixedly installed at the upper ends of the standard knots. A stretching type bearing table is installed on one sides of the upper portions of the standard knots in a cantilever type mode. The cantilever end of the stretching type bearing table is connected with the upper end of the original bearing platform of the building in a flush butt-joint mode. A pull rod is connected between one side of the lifting bearing frame and the building. After the fast installation type lifting platform is used for site-in construction of indoor substation electrical equipment, the risks of equipment toppling and platform collapsing are avoided, meanwhile, construction efficiency is improved greatly, original platform preparation time of 10 hours is shortened to 2 hours, the lower jacking fast installation type lifting platform can be repeated used and is suitable for lifting transfer of various heights, and construction cost is lowered greatly.

The invention discloses a rock stratum super-large tunnel spanning high-side slope tunnel portal supporting structure and a construction method thereof. The supporting structure comprises upward slopeground beams, annular upward slope anchor cables, vertical high-strength prestressed steel cables and in-tunnel system anchor rods or anchor cables, wherein the upward slope ground beams are externalstress structures of a tunnel portal supporting system; the annular upward slope anchor cables are arranged on a side slope of a tunnel portal, and unstable blocks formed by rock fractures and fracture zones at the top of a tunnel portal section structure are fixed on peripheral stable blocks through the annular upward slope anchor cables, or the unstable blocks are connected in series to form the stable blocks; the vertical high-strength prestressed steel cables are arranged in lowering holes of the upward slope ground beams and are arrange in crossed with the annular upward slope anchor cables; and the in-tunnel system anchor rods or anchor cables are arranged above a top middle tunnel and top side tunnels. According to the rock stratum super-large tunnel spanning high side slope tunnelportal supporting structure and the construction method thereof, rapid and safe tunnel entering construction of a hard rock stratum high-side slope ultra-large-span underground structure is achieved,a tunnel portal side slope self-stabilization reinforcing body is formed, and the risk that rock mass on the upper portion of a tunnel forms a slip surface, the unstable blocks or rock mass wedges onthe top of the cavern range collapse due to excavation is avoided.

The invention discloses a plastic forming mold for solving an undercut structure, which comprises a forming template, an auxiliary template and a plastic part. The plastic part is provided with an undercut cavity opening to the left, and the left side of the plastic part is An upside-down button body is fixed on the top, a clamping template is fixed on the left side of the forming template and the right side of the auxiliary template, and a cavity with an opening to the right is provided inside the molding template. The upper side of the cavity is provided with a transmission mechanism that can realize the formation of the inverted button body structure. The present invention uses the auxiliary formwork to press the top column to move to the left, and the slide rod drives the screw to penetrate the screw sleeve and drive the screw sleeve to rotate. Both the vertical insert block and the oblique insert block are controlled to be inserted into the mold cavity, so that when the injection molding machine injects plastic raw materials, the raw materials can be formed into plastic parts, undercut bodies and undercut cavity structural characteristics in the cavity.

The invention discloses a pressure balance method of combining mud with an external airbag of an earth pressure shield. A mud pressure chamber with one airbag or a combination of multiple airbags is used to connect the top of the shield earth chamber through a pipeline. During the excavation process of the shield machine, the pipeline keeps Unimpeded, using the high compressibility or elasticity of the airbag, using mud as the transmission medium, and keeping in touch with the earth pressure in the soil silo to form a stable balance mode. This mode can eliminate ultra-high pressure (such ultra-high pressure will cause ground uplift, slag outlet or shield tail gushing, and shield tail seal breakdown) or ultra-low pressure (such ultra-low pressure will cause stratum collapse and ground collapse) in the soil bin. The condition of the soil bunker is stabilized within a reasonable range, and the micro-disturbance excavation of the stratum around the tunnel is realized.

A closed airfoil structure partition press molding method, suitable for composite material structure molding method and mold with large elongation scale, double curvature shape and upper, lower, left and right closed sections of aircraft airfoil Scheme, the airfoil structure scheme consists of upper and lower skin honeycomb sandwich panel structures and multiple longitudinal beam structures arranged in the middle. The forming method includes the use of upper and lower shape control molds and vacuum bags for the panel in the interlayer area between the internal beams. And the combination of threaded pipe torque adjustable auxiliary struts and baffles is used to realize the pressure control of all surfaces of the composite material. The present invention can realize the integrated high-precision molding of the structure through co-curing by adopting the method of unequal pressurization in different regions under the condition of different curing pressures required for pressing different parts such as honeycomb sandwich and laminated board.

The invention discloses a shield station-crossing construction method capable of achieving layered backfill in a small and narrow vertical shaft. The method of layered backfill is adopted to form soilwith certain strength, a shield tunneling machine can simulate a normal strata for tunneling during station crossing, on the first layer, a hard backfill material is backfilled, it is ensured that the backfill material has the enough bearing force, the too large sinking generated by self weight during station crossing of the shield tunneling machine is prevented, on the second layer, an originalsoil layer is backfilled, the phenomenon that during station-crossing propelling of the shield tunneling machine, too large resistance is generated, and a pipe segment is structurally damaged is avoided, a cement pile in the backfill soil increases the shield body torque resistance during tunneling of the shield tunneling machine, and the tunneling posture of the shield tunneling machine can be ensured. The method greatly reduces receiving and starting risks during shield station crossing, the hole door water burst sand burst ground collapse risk can be avoided, shield concrete guide platformconstruction, hole door water stop device mounting and an end reinforcing grouting material can be reduced, meanwhile, the time for mounting of a guide platform and other station-crossing materials inthe small and narrow vertical shaft can be omitted, and the shield construction proceed can be improved.