81results about How to "Improve the construction work environment" patented technology

The invention discloses a tower, beam and cable synchronous bridge forming technology. According to the technology, main tower creeping formwork construction, steel box beam cantilever assembly, side span concrete box beam cast-in-place support construction and stay cable and hung cable stretch-draw construction are conducted alternately and synchronously. The tower, beam and cable synchronous bridge forming technology achieves safe and reliable full-bridge construction.

The invention discloses a complete set of tunnel mechanical equipment, which specifically refers to an excavation trolley (or an excavation gantry), a drainage and steel bar binding trolley, a liningtrolley, a spray maintenance trolley, a ditch cable trough trolley, an inverted arch self-propelled hydraulic trestle and a wet spray manipulator, referred to as five trolleys, one trestle and one wetspray machine. A construction organization method matched with the complete set of mechanical equipment comprises the following construction organization steps: S1, hole excavation; S2, initial support; S3, inverted arch lining; S4, arched wall lining; S5, ditch cable troughs and the complete set of mechanical equipment. The construction organization method is reasonable, effectively improves tunnel management effect, improves construction operation environment, ensures construction safety and quality, improves construction progress and is worthy of promotion.

The invention relates to a modular construction method of a high temperature gas cooled reactor nuclear power plant containment bracket section wall, and belongs to the technical field of nuclear power engineering construction. The method comprises the steps that a combined module based on a steel structure is formed by construction rebars and installation parts except wall concrete, and the combined module integrates bracket section rebars, a shielding cooling water pipeline, vapor generator bearing supporting assemblies, vapor generator adjusting line rails, a bracket side face and bottom steel cladding face into a whole structure by adopting an additional steel support structure, so that construction of the bracket section wall is fully moved out of a site for whole assembly. By means of the modular construction method of the bracket section wall, the construction difficulty of a traditional construction method is solved, and the risk of construction safety is reduced; more importantly, the construction period of a critical route is greatly shortened, and the engineering quality of a containment is guaranteed.

The invention discloses a ventilating smoke dissipating system used for underground cavern construction of a large hydropower station. The system comprises an underground cavern, wherein one end of the underground cavern is an air inlet, the other end is an air outlet, a construction adit is formed at one end of the air inlet of the underground cavern, an air inlet pipeline is laid on the top of the construction adit and is obliquely arranged in the construction adit, an air supply machine is arranged at one end of the air inlet pipeline, the air supply machine is arranged at the hole of the construction adit, an exhaust outlet is formed in the top wall of one end of the air outlet of the underground cavern, an exhaust shaft is arranged on the exhaust outlet, the upper end of the exhaust shaft is connected with an exhaust footrill, the exhaust footrill is provided with a wind stop wall and an exhaust fan at a position connected with the exhaust shaft. The system has the beneficial effects of greatly improving the air quality of a working face of each large underground cavern, creating a good construction working environment and ensuring construction quality and construction safety.

An assembly type concrete bidirectional ribbed floor and a construction method therefore belong to the technical field of building engineering. The assembly type concrete bidirectional ribbed floor includes a concrete bar-shaped channel board, a prefabricated concrete bar-shaped hollow board, prefabricated concrete groove-shaped blocks, and prefabricated concrete hollow blocks. The construction method relates to four types of design, member prefabrication and installation construction in sum. The production technology and devices are simple. The hoisting and installation are convenient. Formwork engineering and plastering are avoided, and construction processes are reduced. The steel bar binding workload is low, and the steel bar binding quality is easy to guarantee. The construction efficiency is improved, the appearance quality is good, and the appearance is flat and clean. The construction work environment is improved. The engineering construction cost is obviously reduced. The prefabricated concrete bar-shaped channel board and the prefabricated concrete bar-shaped hollow board have a bearing function during the construction period, so that arrangement of supports is not needed. Although the prefabricated concrete groove-shaped blocks and the prefabricated concrete hollow blocks need support, the needed support is less.

The invention relates to a construction method for simultaneous extension of parallel guide pits into a double-line tunnel for TBM tunneling construction and aims to guarantee simultaneous construction of the double-line tunnel and an I-line tunnel, put into operation at the same time and realize effective shortening of the total construction period of the tunnel and great reduction of the construction cost. The method comprises steps that small-diameter open TBM is utilized for full-section excavation in-advance construction of the parallel guide pits; after lagging behind the tunneling surface of the parallel guide pits about 800m, large-diameter TBM full-section tunneling construction of the I I-line is utilized at the left or right side of the parallel guide pits at 30-50m, and a transverse passage between the parallel guide pits and the I-line tunnel is constructed along the extension direction of the line at intervals; after lagging behind the TBM tunneling surface of the I-linetunnel about 1200 meters, extension construction of the parallel guide pits is carried out, that is, when the parallel guide pits are continuously tunneled without interruption by the small TBM ahead,the borehole-blasting method is utilized to carry out simultaneous digging extension of the constructed parallel guide pits at about 2km lagging behind the tunneling surface of the parallel guide pits, and the double-line tunnel is formed.

The invention discloses a tunnel construction cooling device and method. The tunnel construction cooling device includes a press-in type fan, a fog gun machine, a heat insulation water tank and a cooling device body. The cooling device body is installed in the heat insulation water tank. The output end of the heat insulation water tank communicates with the input end of the fog gun machine. The output end of the fog gun machine and the input end of the press-in type fan are arranged oppositely. The cooling method of the tunnel construction cooling device includes the following steps that 1, the heat insulation water tank is filled with sufficient water; 2, low-temperature liquid is led into the cooling device body; 3, the cooled water in the heat insulation water tank is led into the fog gun machine and is atomized and sprayed out by the fog gun machine; and 4, the press-in type fan sucks cold air from a spray-out area of the fog gun machine and sends wind to a construction section ina tunnel. According to the tunnel construction cooling device and method, the temperature of the construction position in the tunnel can be reduced, the life safety of workers is ensured so that the workers can be able to work normally, the cost is saved, manpower is saved, and the construction environment is kept good.

The invention relates to a design method of a deeply-buried PBA subway station section. The design method includes the following steps that a, a void is detected; b, a composite anchor rod pile (14) is driven on the ground; c, a large pipe shed (4) is applied; d, small pilot tunnels (2 and 3) are constructed; e, grille arch centers for the small pilot tunnels (2 and 3) are erected; f, initial supporting is conducted on the inner parts of the small pilot tunnels (2 and 3), and then side piles (5 and 6) are applied in the small pilot tunnels (2 and 3) correspondingly; g, a main body arch part (1) is excavated, initial supporting is conducted, and a secondary lining structure (9) is poured by concrete; h, a soil mass of a lower main body center (10) is excavated; i, a bottom plate (11), a side wall (12) and a middle plate (13) of a lower secondary lining structure of the lower main body center (10) are constructed; and j, an accessory structure is applied, and a complete station structureis formed. According to the method, the construction safety, the construction quality and the construction period can be ensured, the cost can be saved, and the construction efficiency can be improved; and section structure design is reasonable, the overall structure is stable, construction is easy and convenient, and the use effect is good.

The invention relates to a construction method for a plate ballast bed of a metro. The method comprises the steps of a basement backward paving construction step, in which a truck mixer transports concrete from a front material feeding well segment to a material storage truck to and fro via a pump or a belt conveyer in a backward moving manner, the material storage truck moves backward to an area to be paved and discharges concrete, and a paver paves; and a plate pathway conveying and paving steps, in which a back pathway and floating plates are transported to a construction area by using a flatcar, a plate paver is used for sequentially discharging the floating plates from the flatcar and paving the same to a predetermined area; and then the pathway is discharged from the flatcar and paved on the floating plates. According to the method provided by the invention, building of a temporary pathway is not needed, the damage to tunnel segments caused by the temporary pathway when the temporary pathway is supported and fixed is reduced, and the construction speed is rapid; in a tunnel, both the truck mixer and the material storage truck can move on a plane as well as a hook face for conveying the concrete, so that the concrete transportation cost is low, and the adaptability is good; the backward paving construction can be operated with subsequent construction in parallel, so that the construction efficiency is high.

The invention discloses a shield starting tunnel portal extension steel ring. The shield starting tunnel portal extension steel ring is characterized in that the steel ring comprises a steel ring body (1) with the width of at least 45mm, one end of the steel ring body (1) is connected with a first ring plate (2), the internal diameter of the first ring plate (2) is equal to that of the steel ring body (1), the external diameter of the first ring plate (2) is larger than the diameter of the steel ring body (1), and a second ring plate (3) is fixedly connected with the first ring plate (2), twice as thick as the first ring plate (2) and embedded in the wall of a tunnel portal. The shield starting tunnel portal extension steel ring is simple in structure and skillful in design, avoids dust pollution caused by manual pile breaking and can improve working efficiency of a shield machine.

The invention provides an elastic felt hanging construction method for a large full-containment low-temperature storage tank. The method comprises the steps of 1) building a material platform, lifting materials to the material platform and carrying the materials to a suspended roof floating plate in a tank; 2) installing an electric hanging basket on a vault guide rail; 3) establishing a support on the suspended roof floating plate; 4) installing pulleys and a guide chain on the vault guide rail; 5) prefabricating elastic felt modules; 6) installing heat preservation nails; 7) installing clamping plates; 8) winding glass cloth; 9) installing a hanging hook, a temporary hanging hook and temporary clamping plates; 10) pushing one elastic felt module and stops pushing with a remaining length being 5-6m; 11) hitching the temporary hanging hook to the guide chain and slowly pushing the remaining part of the elastic felt module; 12) moving the pulleys and moving the elastic felt module to a predetermined position of a tank wall; 13) dismounting the temporary clamping plates, ropes and the temporary hanging hook and finishing formal hanging on the tank wall; 14) successively hoisting and conveying the other elastic felt modules to predetermined positions, dismounting temporary clamping plates, ropes and temporary hanging hooks, making the elastic felt modules abut on the adjacent properly-installed elastic felt modules and finishing formal hanging on the tank wall; 15) tying ropes to rope holes of the clamping plates and the corresponding tank bottom concrete ring beam pre-buried pull ring; completing the hanging construction.

The invention discloses an oriented dust-exhaust dust-fall cover of a high pneumatic DTH (Down-The-Hole) drill. The directional dust-exhaust dust-fall cover comprises a dust fall cover, a filter screen and a dust exhaust oriented plate; the dust-fall cover comprises left and right parts which are completely symmetric to each other, the upper part of the dust-fall cover is provided with an airtight piece, and a gridding hollow part is arranged all around the lower part of the dust-fall cover; the filer screen is arranged in the dust-fall cover, and the outer surface of the gridding hollow part covers the movable dust exhaust oriented plate; one sides of the left and right parts of the dust-fall cover are provided with a rotating shaft, the left and right parts are connected through the rotating shaft, and the other sides of the left and right parts of the dust-fall cover are provided with clamping bolts. According to the oriented dust-exhaust dust-fall cover provided by the invention, the effective control of the dust of the high pneumatic DTH drill can be realized, the strong anti-interference to wind can be realized, the dust diffusion can be realized, a worker can be prevented from sucking excessive dust, and the construction environment can be improved; the device is simple to operate, low in price and environmental-friendly in material, and is likely to be maintained, thereby being applicable to various drilling and construction environments, especially applicable to the operation of a windy wild drilling machine.

The invention relates to a soil/underground water integrated injection system and a single-source, double-source and mixed micro-nano bubble liquid injection method thereof. A medicament configurationunit, an air supply unit and a water supply unit, which are controllably connected through different channels, are arranged in a container body and controllably connected to an injection buffer and an injection distributor, and a controller is used for controlling opening and closing of all the channels under different requirements to complete injection operation of water/medicament/air, micro-nano bubble water and mixed micro-nano bubble liquid. The system is mainly used for repairing polluted sites and underground water, can be applied to polluted sites of various geologies, has a strong medicament mixing performance, can perform various remediation operations on the polluted regions such as liquid injection, liquid-gas injection, aeration, and the like, can dredge an injection well, issuitable for polluted sites of various geologies , has the advantages of mobility, efficiency, long service life, high safety in construction process, good construction and operation environment, andthus has a good application prospect.

The invention relates to an aqueous metal baking varnish and a preparation method thereof, wherein the aqueous metal baking varnish comprises, by mass, 40-60 parts of an aqueous acrylic resin, 10-30 parts of an amino resin, 0.1-1.5 parts of a leveling agent, 1-10 parts of a neutralizing agent, 5-20 parts of a cosolvent, and 5-20 parts of water. According to the present invention, the film formingsubstance is formed by using 40-60 parts of the aqueous acrylic resin and 10-30 parts of the amino resin, and is subjected to the cross-linking reaction under the high temperature baking during the use so as to form the continuous phase on the metal surface, such that the decoration and protection effect is provided for the metal surface, the characteristics of high adhesion, high hardness, salt spray resistance, boiling resistance, wear resistance and the like can be achieved, the harm of the organic solvent to the construction operation is reduced, the aqueous metal baking varnish has good environmental protection property, the construction hazard is low, and the problems of traditional pinholes and blistering of the aqueous metal baking varnish can be solved.

The invention relates to an all-plastic construction wall for urban municipal engineering road, groove construction and pipeline project such as coal, water, electricity, heat, communication and so on, comprising wall body, substructure and window. Said substructure is hollow cavity. Water inlet is set at the upper of substructure and water outlet is set at the lower of substructure. Bolt and bolt hole are set at two sides of said wall body respectively. Vertical reinforced ribs are set between said substructure and window and transverse reinforced ribs are set on said substructure. Beneficial effects of the invention are that 1) the figuration is beautiful and canonical, it is coincidence with the demand of the whole circumstance in big city, it is easy to clean; 2) working condition of construction is improved and working efficiency is improved; 3) the usage ratio is high and it is applied in the protection of urban municipal facility and building construction; 4) it is provided with high intensity, good tenacity, strong rigidity, heat resistance, cold resistance, acid resistance, alkali resistance, shock resistance and so on; 5) it is the product with energy saving and environmental protection.