682results about How to "Improve the construction environment" patented technology

The invention provides a protective method for removing an arch bridge, which belongs to the technology field of bridge removal. The method aims to provide a protective bridge removal method with safety, high efficiency and no pollution. The technical points include: building up a new trestle, erecting a gantry crane, carrying out the bridge removal in a reverse order of the bridge building including bridge decking, coping, column, beam, arch rib and arch support in sequence. The removal stage of the arch rib especially includes removing by adopting methods of top-supporting under the arch, arch box transverse stop and horizontal restraining rope, which better solves the difficult problem of the protective bridge removal with safety, high efficiency and no pollution in a complex construction environment of guaranteeing under-arch navigation, high security level, short construction period and various unpredictable elements, manages to meet the design requirements of the removal safety factor in the protective bridge removal process and the limit control under various removal working conditions and guarantees the removal quality and the construction safety. The removal method has low cost and remarkable social benefit reflected in the direct economic analysis, which is a protective removal method of large-span bridges with safety, high efficiency and practicability.

The invention discloses a method for primary support with a corrugated steel plate and concrete combined structure taking the place of a steel grating. The corrugated steel plate and concrete combined structure is formed by assembling and connecting an upper supporting corrugated plate, a side wall corrugated plate and an inverted arch corrugated plate into a ring; two arch feet of an upper step of a cavern are fixedly provided with two pieces of H-section steel, and the upper end of the upper supporting corrugated plate and the upper end of the side wall corrugated plate are supported and fixed through the H-section steel; two arch feet of a lower step are fixedly provided with two pieces of channel steel, the lower end of the side wall corrugated plate is supported and fixed through the channel steel, and an inverted arch lap joint is reserved on the lower end of the side wall corrugated plate; the upper supporting corrugated plate, the side wall corrugated plate and the inverted arch corrugated plate are sequentially connected through flanges in the longitudinal direction; concrete is poured among the upper supporting corrugated plate, the side wall corrugated plate, the inverted arch corrugated plate and surrounding rock. The structure is manufactured through the structure mixing a corrugated steel plate and the concrete, stress is balanced through the structure and the surrounding rock, strength of the primary support is guaranteed, and the structure has the advantages that construction is facilitated, the period is short, efficiency is high, stability is high, and cost is low.

The invention relates to a fillet weld welding structure for K-type grooves of a moderately-thick plate without back chipping and a welding technology of the fillet weld welding structure. The fillet weld welding structure is characterized in that symmetric grooves are formed in the two sides of a web plate, the web plate and a bottom plate are tightly attached when assembled in welding, and no gap is reserved when the web plate and the bottom plate are assembled; the grooves of the web plate are machined through a milling machine, no truncated edge is reserved, and the length parts between the two ends in the grooves are fixed at equal diversion points and polished; a welding robot is used for stably welding a welding bead at the position of ship-type welding, welding is carried out alternatively on the two sides in a multi-layer and multi-run manner, back chipping is not carried out on the back face, and slag is not removed in the bead; and the backward deformation theory is utilized in the assembling process, and double-face alternating welding is adopted in the welding process to restrain deformation. By means of the technology, full penetration of the fillet weld below the K-type grooves of the moderately-thick plate is ensured, and the welding quality is improved; and meanwhile, the welding automation degree and the production efficiency are obviously improved, and the welding construction environment is improved.

The invention discloses a tunnel excavation water pressure blasting construction method. The tunnel excavation water pressure blasting construction method comprises the following steps of (1) arranging a trolley in place and conducting danger elimination; (2) measuring, distributing and drilling holes; (3) installing explosives, water bags and stemming, wherein the peripheral holes are excavated on the arc edge of the tunnel face of a tunnel, and the explosives, the water bags and stemming are installed in the following manners of air spacing, decoupling charge and the explosive quantity at hole bottoms more than that of other parts; cut holes are drilled in an inclined mode, and the included angle between the cut holes and the excavation face is 65 degrees-75 degrees; the continuous coupling charge method is adopted for loosening holes, relief holes, inner ring holes and bottom plate holes, blasting caps are buried into hole bottom cartridges, and energy gathering holes face orifices;the water bags are arranged at the hole bottoms of shot holes, and the water bags are arranged again after completion of explosive charging, and the holes are blocked through the stemming; (4) detonating a detonating network; (5) conducting after-detonation check and misfire processing; and (6) withdrawing the explosives to the warehouse. Through the tunnel excavation water pressure blasting construction method, the energy of explosives can be made full use of, environmental pollution can be reduced, and the cost can be saved.

The invention discloses a high-pressure water jet punching-drilling-expanding-cutting integrated antireflection device for coal seam, which comprises a drilling machine, a drilling rod and a drill bit. The drill bit comprises a cylindrical body, wherein the front end of the body extends forward to form a cone-like reaming portion. A reaming cutter is fixed on the conical surface of the reaming cutter. The end face of the small head end of reaming portion extends forward to form a drilling cutter. The rear end of the body is extended backward to form a slitting portion, and the rear end of the slitting portion is fixedly connected with the drilling rod. Pore passages allowing liquid to pass through are provided in the reaming portion, the body and the slitting portion. The rear end of the pore passages is connected with the center hole of drilling rod. The front hole of the pore passages is provided with a punched hole nozzle. A horizontal slit nozzle is provided within the slitting portion, and the pore passages are also provided with a valve core. Therefore, the invention provides a punching-drilling-expanding-cutting integrated antireflection device for the coal seam, and also provides a method for the antireflection of the coal seam by using this punching-drilling-expanding-cutting integrated antireflection device, in order to effectively avoid the borehole deviation, improve the construction environment, reduce water waste and gas waste, and improve work efficiency.

The invention discloses a steel-FRP (fiber reinforced plastic) composite corrugated plate tunnel supporting method and belongs to the technical field of research and development of composites and novel structures in the tunnel engineering field. The method comprises procedures as follows: prefabrication of a corrugated plate, reinforcement of surrounding rock by driving advanced small pipes, excavation of upper steps, mounting of a top corrugated plate, excavation of lower steps, mounting of side wall corrugated plates, excavation of an inverted arch, fixation of a corrugated plate at the inverted arch, setting of a waterproofing and drainage system and secondary lining construction. After the steps are implemented, construction of preliminary tunnel supporting, the waterproofing and drainage system and a secondary lining structure is completed, and the whole tunnel supporting structure can be completed through repeated implementation of the steps with advancing of the tunnel during specific construction. According to the method, performance of an FRP material and a steel material are sufficiently played, advantages of the corrugated plate are combined, and the method has the advantages that the corrosion resistance is good, the bearing capability is high, the hoop rigidity is high, the construction speed is high, the operation environment is excellent, the excavation range issmall and the like.

The invention provides a prefabricated ECC-RC combination beam column joint component, wherein ECC refers to engineered cementitious composites, and RC refers to reinforced concrete. The prefabricated ECC-RC combination beam column joint component comprises a joint, an outward-extending column and an outward-extending beam, wherein the joint, the outward-extending beam and the outward-extending column are respectively composed of an ECC material, longitudinal bars and stirrups, the outward-extending length of the outward-extending column is about 1-2 times of the height of the column section, the outward-extending length of the outward-extending beam is about 1-2 times of the height of the beam section, H-shaped steel is embedded in the end of the outward-extending beam and the end of the outward-extending column, the embedded depth ranges from 10 cm to 20 cm, the H-shaped steel and the longitudinal bars extend out of the ends for 10-20 cm, the embedded part of the H-shaped steel is welded to the longitudinal bars, the embedded H-shaped steel of a prefabricated RC beam, the embedded H-shaped steel of a prefabricated RC column and the embedded H-shaped steel of the prefabricated ECC joint are connected through high-strength bolts, and the longitudinal bars are connected through a straight thread sleeve. According to the prefabricated ECC-RC combination beam column joint component, the prefabricated beam column joint component formed by pouring the steel bar reinforced ECC material is applied to an assembly type frame structure, compared with a general reinforced concrete joint component, the ductility and the anti-seismic property of the structure are improved remarkably, the number of joint stirrups in use is reduced substantially, pouring is facilitated, and construction is convenient; besides, the high tenacity of the ECC material can reduce residual deformation of the structure after an earthquake, and therefore post-earthquake repair expenses are reduced.

The invention relates to a long-span tunnel overlapping carrying arch structure for an upper-soft and lower-hard stratum and a construction method thereof. The arch structure comprises an outer layer of arch-shaped primary support, two layers of arch-shaped primary supports, two arch springing longitudinal beams and an arch-shaped wall rock reinforcement ring, wherein the two layers of arch-shaped primary supports, the outer layer of arch-shaped primary support and the arch-shaped wall rock reinforcement ring are sequentially overlapped on a tunnel vault part from inside to outside. The arch structure has the characteristics of simplicity in structure, strong carrying capacity, better stress and waterproof properties, convenience for construction organization and good usage functions, and is capable of providing a wide operating space during a construction period and creating a comfortably open and closed underground space during a usage period. The construction method has the characteristics of simplicity in process and convenience for operation, and is capable of reducing construction safety risks, controlling stratum settlement very well, realizing large mechanical operation, improving work efficiency, saving construction costs and the like.

The invention relates to a prefabricated rotary drilling compound pile and a construction method thereof and belongs to the technical field of a construction foundation component. The prefabricated rotary drilling compound pile comprises a pile body and a pile tip, wherein the pile tip is taper-shaped; a blade, which forms an acute angle together with a horizontal cross section of the pile body, is arranged on the outer surface of the pile body; the number of the blade is at least one; the blade is spiral, fan-blade-shaped or coulter-shaped; the blade is continuously or discontinuously distributed on the outer surface of the pile body along the axial direction of the pile body; spiral plates are arranged on the outer surface of the pile body at intervals; and the spiral plates are continuously or discontinuously arranged in a 360-degree range on the outer surface of the pile body. The spiral plates are arranged on the outer surface of the pile body, outer packing slurry is poured outside the pile body and inner core slurry is poured in the pile body, thereby forming the expanded head type prefabricated compound pile, further greatly increasing bearing capacity of a pile and expanding the application range of the prefabricated pile. The prefabricated rotary drilling compound pile has the advantages of strong applicability, high construction efficiency, environmental protection,and the like, and can be applied to foundations of engineering fields, such as industrial and civil architectures, municipal architectures, bridges and roads, railways, water conservancy projects, mines, ports, and the like.

The invention discloses a ground pre-grouting construction technology suitable for strengthening deep long-distance roadway surrounding rock, and particularly relates to a ground pre-grouting strengthening technology for deep long-distance roadway surrounding rock. The ground pre-grouting strengthening technology for the deep long-distance roadway surrounding rock includes the following steps that firstly, a ground grouting drill hole is formed in the ground through a drilling machine, the ground grouting drill hole comprises a casing pipe segment, a deflecting segment and a horizontal strengthening segment, a casing pipe segment drill hole is internally provided with a casing pipe, the deflecting segment and the horizontal strengthening segment are provided with rock open holes, and ground inlets of the ground grouting drill hole are formed in the walking direction of a roadway; secondly, grout is injected into a stratum rock body where the horizontal strengthening segment exists through a grouting pump located on the ground, and beforehand strengthening government of the roadway surrounding rock is achieved. According to the ground pre-grouting construction technology for strengthening the deep long-distance roadway surrounding rock, strengthening and grouting of the whole roadway surrounding rock can be achieved, and the ground pre-grouting construction technology is suitable for active strengthening of the coal mine large-range roadway surrounding rock and is high in safety and adaptability.

The invention discloses a multi-dimensional glass mounting robot which comprises a multi-dimensional mounting head, a telescopic mechanical arm and a rotary walking chassis, wherein the multi-dimensional mounting head is mounted on the telescopic mechanical arm; the telescopic mechanical arm is mounted on the rotary walking chassis; the multi-dimensional mounting head comprises an up-down slidingunit, a left-right rotating unit, an overturning unit, a rotary unit and a translation unit. The multi-dimensional glass mounting robot is scientific and reasonable in design and compact in structure,at least can achieve movement in eight directions, solves the problems of multi-dimensional and multi-angle mounting and carrying, and achieves the effects of efficiently and flexibly mounting and carrying by coarse and fine adjustment. The multi-dimensional glass mounting robot disclosed by the invention achieves mechanical and auxiliary automatic operations of grabbing, carrying and mounting large glass panels, so that the large panel mounting quality, the production efficiency and the benefit are improved, a lot of labor forces are saved, the labor intensity is reduced, and the construction cost is lowered.

The invention relates to a prestressed prefabricated ECC-RC combination beam column joint component which comprises a prestressed rib and a joint with a bracket. The joint with the bracket is composed of an ECC material, longitudinal bars and stirrups. The joint with the bracket comprises an outward-extending column, wherein the length of the outward-extending column is about 1-2 times of the height of the column section. A hole channel is required to be reserved between the joint and a prefabricated RC beam connected with the joint. The prefabricated ECC joint is connected with the prefabricated RC beam through the post-tensioned prestressed rib which penetrates through the hole channel. H-shaped steel is embedded in the end of the outward-extending column and the end of a prefabricated RC column, wherein the embedded depth and the outward-extending length both range from 10 cm to 15 cm, the longitudinal bars at the end of the outward-extending column and the end of the prefabricated RC column respectively extend outwards by 10-15 cm, the embedded part of the H-shaped steel is welded to the longitudinal bars, the embedded H-shaped steel of the prefabricated RC column and the embedded H-shaped steel of the prefabricated joint are connected through high-strength bolts, and the longitudinal bars are connected through a straight thread sleeve. According to the prestressed prefabricated ECC-RC combination beam column joint component, the prestressed prefabricated joint component formed by pouring of the steel bar reinforced ECC material is applied to an assembly type frame structure, so that the ductility and the anti-seismic property of the structure are improved remarkably, the number of joint stirrups in use is reduced substantially, pouring is facilitated, and construction is convenient; since prestress is used as an assembly means, residual deformation of the structure after an earthquake can be reduced, the restorable function is achieved, and post-earthquake repair expenses are reduced.

The invention relates to composite high-viscosity modified asphalt and a preparation method thereof. The raw material comprises the following components by weight percent: 84-88% of heavy duty bitumen and 12-16% of modified compounds. The method comprises the following steps: mixing SBS, desulfurized colloidal particles and a compatilizer containing an epoxy group to prepare a modified compound; preparing modified particles after mechanically pelletizing; adding the modified particles to asphalt at 170-190 DEG C; melting and refining compound particles after shearing at a high speed for 30-60 minutes on a high-speed mixing emulsifier; transferring the sheared asphalt to a high-speed disperser, and agitating to obtain the composite high-viscosity modified asphalt. The composite high-viscosity modified asphalt prepared by using the method has the characteristics of stable heat storage, and excellent high and low temperature properties, has good economic benefits and environmental effects because of use of waste rubber, and is free of sulphur as a stabilizer, the construction viscosity can be reduced, the construction environment can be improved, and the problem that incompatible asphalt is difficult to stabilize is solved.

The invention discloses an asphalt cool recycled cement gravel mixed in-place train and a method for construction. The train comprises a scraper feeder, and also comprises a generating unit, a power control cabinet, a water tank, a metering pump, an emulsion asphalt tank, an emulsion asphalt pump, a powder shifter, a mixer, a lateral charging belt conveyor and a main conveying belt which are arranged on the train body, wherein the train body is also provided with a cement tank, a mineral powder tank, an aggregate recycle bin and a new aggregate bin; cement and mineral powder metering spiral conveyors which are used for weight graduation and have discharge ports jointed with the main conveying belt, a recycled aggregate electronic feeder and a new aggregate electronic feeder are respectively arranged under discharge ports of each vessel; and the power control cabinet is in electrical connection with a running conversion motor on the scraper feeder, and is in electrical connection with the metering pump, the emulsion asphalt pump, the recycled aggregate and the new aggregate electronic feeders, and the cement and mineral powder metering spiral conveyers. The recycling technology does not require removing, crushing and heating scraps, shortens construction time, and saves materials and transportation cost.

The invention relates to a water-borne epoxy composite-containing emulsified asphalt cold-recycling agent and a preparation method thereof. The cold-recycling agent is prepared from the following components in parts by mass: 100 parts of emulsified asphalt and 10-20 parts of water-borne epoxy composite, wherein the water-borne epoxy composite comprises a component A and a component B, the component A is prepared from the following ingredients in parts by mass: 100 parts of water-borne epoxy emulsion, 10-25 parts of waterborne blocked polyurethane, 0.5-2 parts of associated thickener and 0.5-2 parts of coupler, and the component B is prepared from the following ingredients in parts by mass: 100 parts of an amine water-borne epoxy curing agent and 10-20 parts of accelerant. Compared with the prior art, the water-borne epoxy composite-containing emulsified asphalt cold-recycling agent belongs to a homogeneous system, has an excellent low-temperature flexibility, high-temperature stability, excellent water stability, good abrasion resistance and high early strength while the strength is improved, and the mixed material has excellent pavement performances and can be directly applied to the surface layer of pavement.