43results about How to "Improve structural durability" patented technology

The invention discloses a grouting type unbonded prestressed system, belongs to the technical field of unbonded prestressed systems, and solves the problem of unsmooth circulation of an anticorrosive medium of an existing prestressed system. The device comprises a protective cover, an anchor plate, a clamping piece, an anchor bearing plate and an unbonded rib, a sinking table is arranged on the side, close to the anchor bearing plate, of the anchor plate, a plurality of through grooves penetrating to the peripheral face of the anchor plate in the radial direction are formed in the portion, on the outer side of the sinking table, of the anchor plate, each through groove is communicated with a circulation hole, the circulation holes penetrate to the other side of the anchor plate, and the clamping piece is arranged on the other side of the anchor plate. Gaps are formed between the other side face and the peripheral face of the anchor plate and the inner wall of the protective cover, and the anchor plate is provided with an installation structure used for installing a pressure-bearing piece during supplementary tensioning. According to the grouting type unbonded prestress system, an anti-corrosion medium can be quickly and uniformly distributed at each corner of an anchorage device, and long-term effective corrosion prevention is provided. The invention further discloses a construction method and a supplementary tensioning method of the grouting type unbonded prestress system.

The invention belongs to the technical field of bridge deck pavement materials, and provides a quick-hardening cement-based bridge deck pavement material and a preparation method thereof. The quick-hardening cement-based bridge deck pavement material is prepared from the following components in specific parts by mass: sulphoaluminate cement, Portland cement, aggregate, fibers, a mineral admixture, an early strength agent, redispersible latex powder, an additive, a thickening time control agent and water. The bridge deck pavement material disclosed by the invention has good quick-hardening and early-strength performance, high bearing capacity within a short time and good bonding performance; the bridge deck pavement material is excellent in workability and good in early and long-term compressive strength, breaking strength and crack resistance, the service life of concrete is prolonged, and the maintenance cost of the bridge deck is reduced; the repairing agent is used for repairing a bridge deck pavement material, and can quickly recover traffic and reduce the influence on traffic passage.

The invention discloses a pre-tensioning method CFRP rib concrete hollow slab, a tensioning anchorage device and a construction method.The pre-tensioning method CFRP rib concrete hollow slab comprises CFRP embossed ribs, a framework structure, spiral ribs, PVC pipes, cushion blocks and concrete, the cushion blocks are arranged on the lower sides of bottom plate steel bars and the outer sides of vertical steel bars on the two sides respectively, and the CFRP embossed ribs are distributed at equal intervals, arranged in the framework structure and used for tensioning the framework structure; the spiral ribs penetrate through the prestressed CFRP embossed ribs and then are placed at the two ends of the bonding sections of the prestressed CFRP embossed ribs, the PVC pipes penetrate through the prestressed CFRP embossed ribs and then are placed at the two ends of the prestressed CFRP embossed ribs, unbonded sections are formed, concrete is poured on the periphery of the framework structure in cooperation with a mold after the CFRP embossed ribs are tensioned, the mold is dismantled after the concrete is formed, and the prestressed CFRP embossed ribs are formed. And the pre-tensioning method CFRP bar concrete hollow slab structure is formed. According to the scheme, the CFRP embossed ribs can be reliably bonded with concrete under high prestress, and bonding slippage failure is avoided. And secondly, provided anchoring is reliable, and shear damage of the CFRP ribs during tensioning is avoided.

The invention relates to an underground station structure under an existing viaduct and a construction method thereof.The underground station structure is located below the existing viaduct and comprises a station diaphragm wall, station stand column piles, a station top plate, a station middle plate, a station upper layer side wall, a station bottom plate, a station lower layer side wall and a concrete barrel wall; the underground station is located below the existing viaduct and is implemented by adopting a cover and excavation reverse method. The laminates of the underground station and the enclosure structure provide horizontal support for the foundation pit in the construction period, and the number of temporary structures is reduced; the concrete supporting blocks are arranged on the laminates of the underground station, horizontal constraint from top to bottom is provided for existing viaduct piles, the viaduct structure safety is guaranteed, and it is guaranteed that viaduct operation is not interrupted in the construction period; the concrete supporting blocks only provide horizontal acting force between the station structure and the bridge pile structure, meanwhile, the surfaces of the bridge piles are treated, it is guaranteed that the surfaces of the bridge piles are smooth, and mutual acting force is not generated between the bridge piles and the station in the vertical direction.

The utility model provides a tool-free buckle type hoop device for underground pipeline monitoring, which relates to the technical field of engineering monitoring and comprises an upper hoop, a hoop fixing component is arranged on the lower side of the upper hoop, a spring sleeve is welded to the center of the inner side of a slot, a telescopic spring is mounted on the inner side of the spring sleeve, and the telescopic spring is connected with the hoop fixing component through a bolt. Sleeve holes are formed in four corners of the spring sleeve; according to the hoop fixing assembly, the rack below the upper connecting plate is clamped into the inserting groove of the lower connecting plate along with the upper hoop, the rack can extrude the telescopic toothed plate to be meshed with the telescopic toothed plate, in the process, the telescopic spring is pressed to generate elastic force to push the telescopic toothed plate to be meshed tightly, firm connection is ensured, looseness is prevented, and the service life of the telescopic toothed plate is prolonged. And the two sets of racks are synchronously meshed with the telescopic toothed plate, a double-locking mechanism is formed, the tensile strength is enhanced, it is guaranteed that no displacement exists at the connecting position, and the durability of the whole structure is improved.

The application discloses a composite steel pipe single pile filled with recycled building materials and a construction method thereof, and belongs to the technical field of steel pipe piles. The composite steel pipe single pile comprises a steel pipe pile body, a cavity is arranged in the steel pipe pile body, the cavity is used for filling recycled building materials, a plurality of interface connecting mechanisms are arranged in the cavity, and a sealing mechanism is arranged on the top surface of the steel pipe pile body. By constructing a steel-filling core composite cross-section structure, the cross-section inertia moment and the overall bending stiffness are improved, the pile top displacement and bending deformation can be effectively reduced under the action of horizontal load, the single pile horizontal bearing capacity is improved by optimizing the cross-section stress system under the condition of controlling the steel consumption, and the structural material utilization efficiency is improved. The collaborative working capacity between the steel pipe and the filling body is enhanced through the interface connecting structure, the overall stress performance of the composite structure is improved, the air retention space in the steel pipe is reduced by filling the recycled building materials, the temperature and humidity fluctuations are alleviated, and the internal service environment is improved.

The invention belongs to the technical field of automobile active suspension damping systems, and particularly relates to a mute stiffness valve and a control method thereof. The stiffness valve is switched from an open state to a closed state, and the plunger at least comprises a first stroke section, a second stroke section and a third stroke section; in the first stroke section, first direction current is input into the voice coil motor structure, so that the plunger is in an acceleration state; in the second stroke section, current input to the voice coil motor structure is stopped and / or second-direction current opposite to the first-direction current is input, so that the plunger is in a deceleration state; and in the third stroke section, the current in the first direction is input into the voice coil motor, so that the sealing element between the plunger and the air vent is compressed and seals the air vent. By controlling the current input into the voice coil motor structure, control over the moving direction and speed of the plunger is achieved, on the premise of quick response, the impact force generated when the plunger makes contact with the sealing support is remarkably reduced, and noise generated by impact is restrained.

The utility model provides a vertical take-off and landing aircraft motor damping insulation fixing structure. The vertical take-off and landing aircraft motor damping insulation fixing structure comprises a motor, a transverse damping mechanism, a longitudinal damping mechanism, a propeller fixedly installed on the motor and an insulation plate fixedly connected to the bottom of the motor. The transverse damping mechanism comprises a transverse plate movably connected to the insulating plate, one side of the transverse plate is fixedly connected with two fixing blocks, and the adjacent sides of the two fixing blocks are fixedly connected with a rod body. According to the technical scheme, the motor is arranged, so that the insulating plate and the fixed plate on the motor can vibrate, the gap between the insulating plate and the fixed plate is changed, the damper can be extruded to deform, the movable plate is driven to extrude the spring, double-layer damping buffering is performed on external stress, the motor on the insulating plate and the longitudinal damping fixing between the fixed plate are prevented from bearing overlarge stress, abrasion is reduced, and the service life of the motor is prolonged. The overall structure durability is improved.

Provided is an electrolytic solution that includes: an electrolyte containing lithium salt; and a nonaqueous solvent containing cyclic alkylene carbonate and methyl propionate, the electrolyte contains lithium salt other than LiPF6 in an amount of not less than 30 mol% with respect to a total amount of the lithium salt, and the nonaqueous solvent contains 75 volume% or more of the methyl propionate.

The invention provides a reinforcing steel bar anti-corrosion material based on microorganism induced mineralization, a preparation method and application thereof, the anti-corrosion material comprises urealytic bacteria with induced mineralization ability, nutrients, urea and a calcium source, and the nutrients comprise 4-6 g / L of soybean protein, 15-20 g / L of casein, 5-10 g / L of calcium sulfate, 5-10 g / L of magnesium sulfate, 5-10 g / L of magnesium sulfate, 5-10 g / L of magnesium sulfate and 5-10 g / L of magnesium sulfate. The preparation method specifically comprises the following steps: activating and culturing the urealytic bacteria with the mineralization inducing capability, centrifugally collecting, adding the urealytic bacteria into the nutrient, urea and calcium source solution which are weighed according to the mass ratio, and uniformly stirring by using a glass rod, thereby obtaining the product.

The invention provides a preparation method of a preset continuous fiber ultra-high performance cement-based material, which comprises the following steps: S1, manufacturing a mold according to a cement product, winding a steel fiber on a steel wire roller, enabling the starting end of the steel fiber to sequentially penetrate through a left perforated plate and a right perforated plate, fixing the left perforated plate, moving the right perforated plate to the right end of the mold, and fixing; s2, steel fiber ends on the outer side of the right perforated plate are bent and fixed through a right bent pressing plate, steel fibers are tightened, then steel fiber ends on the outer side of the left perforated plate are bent and fixed through a left bent pressing plate, a steel wire roller is loosened, the steel fibers fixed by the left perforated plate are cut off, and a preset steel wire array is obtained; and S3, pouring a high-strength cement matrix into the mold, and curing to obtain the preset continuous fiber ultra-high-performance cement-based material. According to the method for presetting the steel fibers, the steel fibers can be accurately positioned and synchronously and uniformly stressed, so that the quality of the cement-based composite material is guaranteed, and the performance of the cement-based composite material is effectively improved.

The invention belongs to the technical field of elevator anti-falling, and particularly relates to a freight elevator with a car anti-falling brake mechanism, which comprises a freight platform, a safety clamp, a traction rod, a sleeve, a speed limiting index and an auxiliary clamp, the freight platform is arranged at the bottom of a car and used for carrying passengers, and guide rails are arranged on two sides of the freight platform; the two safety tongs are arranged at the bottom of the cargo carrying platform, ascending connecting rod mechanisms for triggering linkage are arranged on the side faces of the safety tongs and used for enabling the safety tongs to grasp the guide rail, the traction rod is arranged between the two safety tongs, the two ends of the traction rod are connected to the ascending connecting rod mechanisms on the safety tongs respectively, and the sleeve is arranged on one side of each ascending connecting rod mechanism. The sleeve is used for limiting the movement range of the ascending connecting rod mechanism, and the sleeve is arranged outside the speed limiting index in a sleeving mode and is in sliding fit with the speed limiting index. Two-stage braking can be achieved, it is ensured that multiple sets of braking units respond quickly and synchronously during triggering, the safety margin is prolonged, reliable parking within a preset distance is achieved, and the safety of personnel and equipment is guaranteed.

The utility model relates to a kind of rear subframe structures of five connecting rod suspension system, comprising: longitudinal beam, two longitudinal beams are longitudinally extended along the first direction and are symmetrically spaced along the second direction;Front crossbeam is connected with the front section of longitudinal beam;Rear crossbeam is spaced apart along the first direction with front crossbeam, and the rear end of two longitudinal beams is respectively penetrated and connected in rear crossbeam;Support assembly is used to install five connecting rod, and it includes front lower arm support, front upper arm support, camber arm support, toe arm support and rear upper arm support symmetrically arranged on two longitudinal beams;Two front longitudinal reinforcing plates are connected to front crossbeam at front end, and connected to camber arm support at rear end;Transverse stiffener beam is respectively connected to two camber arm supports at both ends, and connected to rear crossbeam at rear end;Rear longitudinal reinforcing plate is connected to transverse stiffener beam at front end, and connected to rear crossbeam at rear end.The utility model has the beneficial effect of realizing high overall stiffness / modality, high bending / torsional stiffness, high local dynamic stiffness and excellent space utilization.

The sunken toilet ground structure comprises a backfill layer, a cushion layer, a waterproof layer, a bonding layer and a facing layer which are sequentially arranged upwards from the bottom of a caisson structure. Wherein the thickness of the cushion layer ranges from 40 mm to 50 mm. By thickening the cushion layer, the loading capacity of the cushion layer is enhanced, it is ensured that the ground structure does not sink when bearing top pressure, the bearing pressure of the backfill layer is relieved, the structural durability is improved, and water seepage and even potential safety hazards caused by cracks generated due to sinking of the ground structure of the toilet are reduced; the waterproof layer is not arranged in the caisson structure, water leaking to the backfilling layer can be drained in time, it is prevented that the water remains at the bottom of the caisson structure for a long time and goes bad to generate peculiar smell, the using comfort of the toilet is improved, and the construction and maintenance cost is reduced.

The invention discloses a solar energy and wind energy temperature increasing hanging and paving system and method for preventing freezing injury of a tunnel in a cold region. The system comprises a solar power generation device, a wind energy power generation device, a solar cooker, a hanging and paving pulley device and a heating cable pipeline. The solar cooker is connected with a tunnel entrance section heating cable pipeline; the heating cable pipeline is laid on the surface of a tunnel center ditch and the surface of a tunnel second lining. The solar power generation device and the wind power generation device are located on the outer side of the tunnel entrance section and provide electric energy for a power source in the tunnel. The hanging and laying pulley device is embedded in the surface of the tunnel secondary lining and can drive a heating cable pipeline on the surface of the tunnel secondary lining to move in the longitudinal direction of a tunnel. Clean energy in the cold region can be fully utilized, the heating efficiency is high, the heat preservation effect is good, the device structure is simple, the heating power can be automatically adjusted according to the environment temperature, manual guarding is not needed, the problem of cold region tunnel freezing damage can be thoroughly solved, the tunnel structure durability is enhanced, and driving safety is guaranteed.

The invention provides a photo-curing-based deodorizing sanitary ball as well as a preparation method and application thereof, and the sanitary ball comprises the following components in parts by weight: 35-80 parts of an acrylate prepolymer and a reactive diluent, 5-30 parts of a solid organic active matter, 3-20 parts of an MOF catalytic filler, 2-15 parts of a microencapsulated aromatic and 0.5-8 parts of an auxiliary agent. According to the invention, an acrylate prepolymer system forms a high-strength and high-crosslinking three-dimensional network skeleton through photopolymerization, so that the water washing resistance and the structural durability are remarkably improved, and the problem that a traditional material is easy to disintegrate is solved; the normal-temperature photocuring process is adopted, damage of high temperature to thermosensitive components is avoided, multiple effects of catalysis, neutralization and slow release can be achieved by adding the solid organic active matter, the MOF catalytic filler and the microencapsulation aromatic into the sanitary ball, efficient and lasting deodorization is guaranteed, and meanwhile the service life of the product is prolonged.

This utility model relates to the field of suspension technology and provides a multi-link front air suspension for heavy-duty trucks. It includes an axle, a frame, two shock absorbers, a stabilizer bar, and two air springs. The stabilizer bar has a U-shaped structure, with each end of the stabilizer bar's crossbar connected to an airbag base via a bracket assembly. The airbag base has a Y-shaped structure, including a thrust rod portion and an airbag portion. The airbag portion is positioned above the stabilizer bar, and an air spring is fixed to the top of the airbag portion via an airbag disc. The thrust rod portion has a concave arc-shaped structure and is located on the side closest to the stabilizer bar's suspension rod. The thrust rod portion of each airbag base is connected to a longitudinal thrust rod front bracket via two parallel longitudinal thrust rods. The top and upper sidewall of the longitudinal thrust rod front bracket are fixed to the frame with bolts. This design enables the structural components to work synergistically, achieving coordinated transmission of multi-directional forces, dispersing the load on the suspension system, and reducing anti-roll forces.

The invention provides an elastic body expansion packer self-adaptive to a well diameter and a using method, and belongs to the technical field of packers. Comprising two fixing seats, an inner supporting core, a rubber sleeve, a connecting pipe, a central pipe and an upper connector, two sliding grooves are symmetrically formed in the inner side wall of the lower fixing seat, a lower connector is arranged in the lower fixing seat, an adjusting assembly is arranged between the connecting pipe and the central pipe, buffering assemblies are arranged between the sliding grooves and the lower connector, and the rubber sleeve is arranged in the lower fixing seat. The sliding sleeve is driven to axially move downwards through the adjusting assembly and the rotating center pipe, the distance between the two inner supporting cores is compressed, axial extrusion is applied to the rubber sleeve to promote radial expansion of the rubber sleeve, and the rubber sleeve effectively adapts to the large well diameter within a certain range. The position of the second sliding block is synchronously adjusted through rotation of the buffering assembly and the center pipe so as to increase the buffering stroke of the spring, self-adaptive protection with the larger hole diameter and the stronger buffering is achieved, and the structural durability is improved.

The application discloses a kind of anti-chlorine salt erosion rubber modified asphalt pavement pit slot repair composite process, in view of the interface peeling caused by chlorine salt erosion in traditional repair process, short repair life problem, innovatively proposes the three-stage repair system of "debridement-interface activation-bionic filling": (1) rough interface is formed by using high-pressure cyclone debridement device to remove loose debris;(2) spray anti-chloride bonding layer containing nano-silane coupling agent, the depth of penetration reaches 3-5mm, forms chemical barrier;(3) layered filling rubber modified asphalt mixture, the gradient compaction is implemented in 30-50Hz of adjustable frequency vibrating road roller.The application improves the interface strength by molecular bonding and mechanical interlocking dual action, realizes the dual anchoring of chemical bonding and mechanical engagement effect of repair layer and original pavement, improves the interface bonding strength, prolongs the service life of repair layer, effectively solves the technical problem that pit slot repair layer is easy to debond and fails in chlorine salt environment, and is suitable for the rapid repair of pavement diseases in coastal areas and road sections where deicing agent is used a lot in winter.

The invention discloses a springback type composite sheet and a preparation method thereof, and belongs to the technical field of composite sheets. The sheet comprises an inner layer, a springback layer, a blocking layer and an outer layer which are sequentially arranged in a stacked mode. The base material of the rebound layer is polyester or polyamide, the tensile strength of the rebound layer is limited to be larger than or equal to 150 MPa, the elongation at break of the rebound layer is larger than or equal to 50%, the thickness of the rebound layer is 10-30 microns, meanwhile, the melt flow rate of the polyester under the condition of 275 DEG C / 2.16 kg is controlled to be 5-20 g / 10 min, and / or the melt flow rate of the polyamide under the condition of 235 DEG C / 2.16 kg is controlled to be 5-18 g / 10 min. The springback layer further comprises functional auxiliaries such as maleic anhydride grafted polyethylene and oxazoline grafted polyolefin, and polyester or polyamide is preferably subjected to two-way stretching treatment. The preparation method comprises the following steps: performing corona treatment on each layer of substrate film, sequentially compounding each layer at different temperatures and pressures by adopting a step-by-step dry-method compounding process, and finally performing curing treatment. The method is used for improving the rebound resilience of the composite sheet packaging.

The invention discloses an energy dissipation and shock absorption node applied to an assembled concrete frame structure, belonging to the field of building structure technology and structural shock absorption. The node is a hinged node, composed of a connecting steel plate, a pin shaft and a pad. The connecting steel plate can rotate with the pin shaft as the center of a circle to increase the deformation capacity of the node. Polytetrafluoroethylene is arranged between the pad and the steel plate to prevent the node from being damaged by friction. Energy dissipation and shock absorption devices are installed above and below the pin shaft. Metal rubber is the main shock absorption component. The metal rubber is placed in a bushing. An extrusion plate is arranged on the beam. The metal rubber can be squeezed by the extrusion plate and the friction between the metal rubber and the bushing can be used to consume part of the energy generated by the earthquake. The invention has a simple structure, and all parts and accessories can be prefabricated in a factory, which is easy to replace, economical and reasonable, has a good shock absorption protection effect, a high safety factor, good structural durability, and can be used for a long time.

The invention discloses a lap joint device and method for FRP rib winding, and belongs to the technical field of prestressed composite material application, the device comprises a sleeve, a clamping piece and a connector, the inner surface of the sleeve is provided with taper, the outer surface of the sleeve is provided with curvature radius, and the rear end of the sleeve is provided with internal threads; the clamping piece is composed of three piece bodies, the inner diameter is slightly smaller than the diameter of the FRP rib, and the outer surface is provided with taper to form taper difference with the sleeve. One end of the joint is in threaded connection with the sleeve; the lap joint method comprises the steps that the clamping piece wraps the FRP rib to be inserted into the sleeve and anchored, and lap joint is completed through connection of the connector and the lock chain. According to the lapping device and method for FRP rib winding, the structure is simple, anchoring is reliable, construction is convenient and fast, and the lapping device and method are suitable for FRP rib prestress winding engineering.

The utility model discloses a shield body structure and a heading machine, and solves the technical problems that the shield body structure in the prior art is a pure steel structure, and when a shell discarding mode is adopted, the shell cost is high, the durability cannot be guaranteed, the working procedure is complicated, the working environment is poor and the like. The shield body structure comprises an inner metal shield shell and a reinforced concrete shield shell connected outside the inner metal shield shell; the heading machine comprises the shield body structure. Compared with an existing shield body scheme, the combined shield body structure has the advantages of being low in manufacturing cost, high in prefabrication degree, high in structural strength and the like. The shield body structure can be used as a temporary structure in the tunneling period to support and protect internal components and can also be used as a tunnel permanent lining segment after tunneling is completed, concrete does not need to be cast in place in a discarded shield body, the working procedure is simple, the shield body structure is of an outer-concrete inner-steel structure, and compared with a traditional method that concrete is cast in place in the shield body, the shield body structure has the advantages that the construction cost is low, and the construction efficiency is high. The structure is more corrosion-resistant and better in durability.

The invention discloses a preparation method and application of a BiOCOOH-A-Fe photocatalyst, and the specific preparation process is as follows: pre-prepared BiOCOOH is taken as a carrier, iron monoatoms are stably anchored on the surface of the BiOCOOH through the axial coordination effect of APTES, the APTES can realize firm loading of the iron monoatoms by the BiOCOOH, so that the prepared composite photocatalyst has better stability and catalytic activity, and the prepared composite photocatalyst has good application prospects. Meanwhile, a-NH2 terminal group which does not participate in coordination in the APTES can obviously enhance the adsorption of NO3 <->, so that the selectivity of nitrogen in the process of photocatalytic reduction of nitrate by the composite catalyst can be improved. The composite photocatalyst has the advantages of wide light response range, high quantum efficiency and the like, nitrate in a water body can be efficiently and rapidly reduced into nitrogen under the illumination condition, and the composite photocatalyst has good stability, can be recycled for multiple times and is an ideal water treatment photocatalyst.

This invention discloses a precast fiber cement board raft foundation pad and its construction method, relating to the field of building construction technology. The pad includes precast fiber cement boards, nuts, lifting rings, and a post-cast concrete strip. Each precast fiber cement board has connecting grooves on all four sides, and grouting holes are provided throughout the board surface. Nuts are pre-embedded below the grouting holes, and the lifting rings are detachably connected to the nuts. Corrugated grooves are continuously provided on the bottom surface of the board. Adjacent precast fiber cement boards are connected into a whole by connecting grooves and post-cast concrete within the post-cast concrete strip. The construction method includes factory prefabrication, on-site layout, hoisting and positioning, grouting the bottom of the boards, and connecting the boards. This invention uses factory-precast panels to replace traditional cast-in-place concrete pads, effectively solving problems such as easy cracking, high moisture content, long construction period, and poor flatness in cast-in-place pads. It has advantages such as short construction period, controllable quality, good durability, and low cost, and is suitable for the construction of raft foundation pads for various buildings.

The utility model provides a kind of automobile windshield strip, it is related to the technical field of automobile connecting accessory, including strip body, strip body includes first sealing portion, connecting portion and second sealing portion, first sealing portion extends and is set along the one end of strip body length direction, first sealing portion is used to be inserted between windshield and automobile front apron;Connecting portion is set along the other end of strip body length direction, and is fixedly connected with first sealing portion, and connecting portion top surface has clamping groove, for with the clamping cooperation of the insertion portion of ventilation cover plate;Second sealing portion is located between first sealing portion and connecting portion, for realizing the sealed connection of windshield bottom end edge and ventilation cover plate edge. Through the insertion type connection of first sealing portion, the detachable clamping structure of connecting portion and the elastic sealing design of second sealing portion, the modular assembly and independent replacement of strip are realized, effectively solve the technical problem that traditional adhesive strip must replace windshield assembly when maintaining.

The invention provides a tunnel structure waterproof and drainage process for railway engineering, and relates to the technical field of tunnel structure waterproof and drainage. A tunnel structure waterproof and drainage process for railway engineering comprises preparation before construction, a water diversion and drainage construction process before primary support, a main tunnel lining waterproof and drainage construction process and construction quality inspection and control. From drainage before primary support to arrangement of a waterproof layer of a main tunnel lining and waterproof treatment of special parts such as construction joints, an all-directional and multi-layer waterproof system is constructed, an underground water leakage path is effectively blocked, the waterproof reliability of a tunnel structure is greatly improved, a perfect drainage network is formed, and the construction period is shortened. It is ensured that underground water can be timely and efficiently drained out of the tunnel, accumulated water is prevented from damaging the structure, drainage smoothness is powerfully guaranteed, the erosion effect of the underground water on tunnel lining concrete and reinforcing steel bars is effectively reduced, the structure degradation speed is slowed down, and the durability of the structure is greatly improved.

The invention discloses a modular permeable floor tile on-site manufacturing device and process, the device is composed of a shaping metal mold manufactured and processed in a factory, mold patterns are preset according to design requirements, floor tile manufacturing is divided into two processes of in-mold pouring and light pressure printing, and the manufactured floor tile has the self-permeable characteristic. The in-mold pouring method comprises the following steps: placing a shaping mold on the leveled compacted road base, uniformly pouring the water-permeable mortar into the mold, compacting and plastering, and uniformly and upwards pulling out the mold, so that the water-permeable floor tile with the drainage grooves and the floral patterns can be formed and is used for a large-area construction area. According to the shallow-pressing printing method, shallow-pressing printing is conducted on the surface of the evenly-flattened permeable cement mortar through a mold, and then the permeable floor tile with the drainage grooves and the floral patterns can be formed and used for local corner areas. The water-permeable floor tiles manufactured on site through the device and the process are durable, not prone to damage and capable of being widely applied to the fields of various buildings and municipal engineering.

The invention provides an unmanned aerial vehicle hangar cabin door control method and an unmanned aerial vehicle hangar, and relates to the technical field of engineering equipment, and the method comprises the following steps: obtaining meteorological state information and work process information; based on the weather information and the work process information, determining a waterproof protection level; the first cabin door and the second cabin door are controlled to move in the directions where the cabin doors are located to be closed to form a water flow conduction structure, and the valve plate mechanism is controlled to work based on the waterproof protection level to adjust the water guide section, so that the water flow conduction structure has drainage efficiency related to the waterproof protection level. According to the unmanned aerial vehicle hangar cabin door control method, the waterproof protection level can be determined based on meteorological state information and cabin door opening and closing frequency information, the valve plate mechanism is controlled to adjust the water guide section, the water flow conduction structure can adaptively adjust the drainage efficiency according to the rainfall intensity and the cabin door use frequency, and therefore efficient dredging of a water guide path is achieved; water accumulation at the cabin door joint is avoided, and waterproof performance and cabin door structure durability are improved.