209results about How to "Reduce the amount of construction work" patented technology

The invention discloses a fluidized coal and gas simultaneous mining system and a synchronous mining method of the system. The fluidized coal and gas simultaneous mining system comprises a hydraulic mining part, a shaft bottom coal and rock treatment part and a coal and rock transport part. Gas released in a hydraulic mining process can be extracted by a gas extraction pump through a gas extraction inclined hole formed in the top of a coal mining driller, a hydraulic mined coal and rock mixture can be subjected to coal and rock separation by the shaft bottom coal and rock treatment part and the coal and rock transport part and then transported upwards and out of a well in a classified manner, the hydraulic mining part and the shaft bottom coal and rock treatment part work respectively without influence to each other, and reliability and mining efficiency of the hydraulic mining process can be greatly improved; automatic work of manless mining can be realized, and mining safety of a coal and gas outburst coal seam is greatly improved; and the system is suitable for mining coal seam resources such as boundary coal and wandering coal seams with low coal content and complex geologicalconditions and is particularly applicable to coal mining of a soft and weak coal seam where coal and gas are prone to outburst.

The invention provides a single-component moisture curable polyurethane waterproof coating and a preparation method thereof. The single-component moisture curable polyurethane waterproof coating comprises the following raw materials by weight: 14-34 part of polyether 220, 4-14 parts of polyether 330, 6-26 parts of chlorinated paraffin, 0.1-1.5 parts of a dispersing agent, 1.0-2.5 parts of a wetting surfactant, 8-15 parts of talcum powder, 15-25 parts of heavy calcium carbonate, 0.1-1.5 parts of a pigment, 5-8 parts of kaolin, 2-8 parts of toluene diisocyanate (TDI), 0.5-2 parts of environment-friendly solvent, 0-0.5 part of dibutyltin dilaurate, and 0.8-1.4 parts of a latent curing agent. In the preparation process of the polyurethane coating, the wetting surfactant and the latent curing agent are added, so that even if a fundamental plane with a lot of dust is encountered in a construction process of the coating, sand holes and other problems cannot arise. Adding of the latent curing agent can prevent the coating from undergoing micro-foaming during construction.

The invention discloses a use method of a self-moving type small sprinkling irrigation device suitable for garden sprinkling irrigation. The self-moving type small sprinkling irrigation device suitable for the garden sprinkling irrigation comprises a rack, a walking device and a sprinkling irrigation device, wherein the sprinkling irrigation device comprises a sprinkling irrigation reel, a sprinkling irrigation PE pipe, a pipe pressing mechanism, a water turbine integrated gearbox and spray nozzles; the walking device comprises a front wheel and a guide rail wheel. According to the use method of theself-moving type small sprinkling irrigation device suitable for the garden sprinkling irrigation, a water turbine is adopted to drive the whole device to realize sprinkling irrigation and self-recovery movement, sprinkling irrigation for garden vegetation is facilitated, furthermore, use flexibility is high, maintenance is convenient, a water transportation pipe network is not required to be pre-embedded in a garden sprinkling irrigation area, the problems about combination space of the spray nozzles and the like are not needed to be considered, besides, by means of a self-moving sprinkling irrigation mode, uniform distribution of water in soil subjected to the sprinkling irrigationcan be realized and uniform irrigation can be guaranteed on the premise of water resource saving, then garden construction quantity is reduced, construction cost is saved, and the method is particularly suitable for the garden sprinkling irrigation.

The invention relates to a coal bed gas exploiting technique, in particular to a process for pumping and exploiting coal bed gas by together using ground well drilling and underground hole drilling, solving the problem of low efficiency of the traditional method for pumping and exploiting the coal bed gas. The process comprises the following steps of: (1) carrying out well drilling on the ground; (2) carrying out long hole drilling in underground coal beds; (3) making drilled holes and ground drilled wells crosslink and communicate in the appointed points by utilizing an orientation technique of a long hole drilling machine; (4) effectively closing the underground long drilled holes; (5) fracturing the ground drilled wells and the underground long drilled holes by utilizing fracturing equipment on the ground; (6) after fracturing, closing the ground drilled wells; and (7) opening the closed ends of the underground long drilled holes and then installing relevant pumping and discharging pipelines connected with underground pumping and discharging systems. The process improves the pumping and exploiting speed and efficiency of the coal bed gas, shortens the construction period of coal bed gas pumping and exploiting engineering and saves the construction investment of the coal bed gas pumping and exploiting engineering.

The invention discloses a pressure resisting type air pipe air leakage preventing structure of a ventilation air conditioner system. The pressure resisting type air pipe air leakage preventing structure comprises a pressure resisting type sealing structure and a clamping structure. The pressure resisting type sealing structure comprises a pressure resisting type sealing strip located between two flange edges of an air pipe flange. The clamping structure comprises a clamping piece clamped on the two flange edges. The pressure resisting type sealing strip is a T-shaped sealing strip. The T-shaped sealing strip comprises a clamping strip and a limiting strip located at the bottom of the clamping strip. The pressure resisting type air pipe air leakage preventing structure is simple, reasonable in design, convenient to install, good in using effect and capable of effectively reducing the air leakage amount of an air pipe of the ventilation air conditioner system. Meanwhile, the invention discloses an air pipe joint machining method. The method comprises the first step of metal panel cutting, the second step of seaming machining, the third step of flange machining edge machining, the fourth step of pipe joint body panel bending and the fifth step of seaming joint closing and compacting. The machining method is simple in step, manufacturing is easy and convenient, the using effect is good, and the air pipe joint machining process can be easily, conveniently and rapidly finished.

The invention discloses a method for constructing a multi-functional metro interchange station complex, which comprises the steps of: performing high-pressure cement grouting on a foundation within design scope; construction of an underground reinforced concrete diaphragm wall; construction of a steel reinforced concrete underground grouting pile group; construction of well spacing pattern double prestressed steel fiber type ground structure floors; dryness of moisture in a soil body by stages; construction of a first underground floor; construction of a second underground floor; construction of an overhead platform metro shield tunnel, a bridge and an overhead platform; construction of a third underground floor; construction of a bottom platform metro shield tunnel, a bridge and a bottom platform; earthwork excavation under the bottom bridge and construction of column facing of the steel reinforced concrete grouting pile group; construction of steel reinforced concrete of a buttress type annular ground beam and steel reinforced concrete of a bottom inverted arch bottom slab; construction of bottom platform and overhead platform rails and the platforms; construction of a steel reinforced concrete light shaft and a steel reinforced concrete elevator shaft; construction of a ground floor; construction of a first floor; and construction of various pipelines, and installation and debugging of various equipment. The method has the advantages of less investment on the construction of metro interchange stations, short construction period, small construction quantity, high construction efficiency, and social resource economization.

The invention provides a rapid plugging/pulling cable branching box. The branching box comprises a box body, three insulators, three copper bars, three connection wires, three T-shaped cable terminals, three straight line adapters and an insulation separation plate, wherein the insulators, the copper bars, the connection wires and the T-shaped cable terminals are arranged in the box body. Each of the straight line adapters comprises a conductive rod, an insulation layer, a rapid clamping head and a housing. One end of each of the straight line adapters is electricallyconnected with one T-shaped cable terminal in the box body correspondingly. The straight line adapters, the T-shaped cable terminals, the connection wires and the copper bars form a three-phase electric access. In use, the copper bars are correspondingly connected with three phase wires A, B and C of a ring main unit incoming cable. The straight line adapters are quickly clamped with rapid joints of three bypass cable joints via the rapid clamping heads. The branching box is simple in structure, low in cost and convenient to achieve. Laying distances of flexible bypass cables can be greatly reduced in use, so a difficulty in remote laying of power supply points and flexible bypass cables is solved and rush repair efficiency is increased.

The embodiment of the invention provides a shield starting base. The shield starting base comprises a supporting structure, shield machine guiding structures and shield machine moving structures, a shield machine accommodating groove is formed in the supporting structure in the axis direction of a tunnel, and a reaction frame accommodating groove is formed in the direction perpendicular to the tunnel axis; the shield machine accommodating groove is vertically arranged with the reaction frame accommodating groove to divide the supporting structure into two front supporting bodies and two rear supporting bodies, and the sides, close to the shield machine accommodating groove, of the two front supporting bodies and the two rear supporting bodies are in chamfered shapes; the shield machine guiding structures are symmetrically arranged on the chamfered surfaces of the two front supporting bodies and the two rear supporting bodies in the tunnel axis direction; and the shield machine moving structures are symmetrically arranged on the upper surfaces of the two front supporting bodies and the two rear supporting bodies in the tunnel axis direction. The shield starting base can reduce the construction cost and work quantity, the construction period can be shortened, and the supporting force to a shield machine can be improved.

The invention discloses a novel deepwater lake water restoring method through bubble plume dispersion oxygenation. In a water stratification period, a plume oxygenation jetting device is arranged at the bottom of a lake, an air source of the plume oxygenation jetting device is pure oxygen, bubbles jetted from the plume oxygenation jetting device and introduced water form air-water mixture, then the air-water mixture ascends to the maximum altitude before thermal stratification while the bubbles are continuously dissolved and disappear, sinking plume is formed due to density difference, oxygen-rich water diffuses all around and enters a distant water environment after the plume sinks to the balance depth, the hypolimnion is directly oxygenated, and the ascending velocity of the air-water mixture is 0.12-0.17m/s. The novel deepwater lake water restoring method through the bubble plume dispersion oxygenation is strong in pertinence; ascending bubbles are rapidly dissolved, the oxygen transfer efficiency is high, the oxygenation effect is good, and the operation difficulty and construction difficulty are greatly simplified; and the novel deepwater lake water restoring method through the bubble plume dispersion oxygenation has the characteristics of no disturbance on the thermal stratification, no damage of a lakebed cold water fish growth environment, high feasibility, low implementation risk and good water restoring effect.

The invention relates to a coal mine downhole self-propelled hydraulic jet tree-shaped drill hole guide device. The device comprises a drill rod, a guider, a drill bit and a dial. The drill rod is in threaded connection with the front end of the guider. The drill bit is in threaded connection with the tail end of the guider. A self-propelled drill bit connected with a high-pressure hose penetrates through the middle of the drill rod and then passes through the guider, the purpose of vertical guide to horizontal guide of the self-propelled drill bit is achieved, and finally self-propelled horizontal drilling is conducted on a coal seam. Horizontal steering of the guider is achieved by guider rotation driven by rotation of the drill rod, and the rotation angle is controlled by the dial. The dial is fixed to a chuck at the front end of the drill rod and the front end of a drilling rig. The device has the main effects that vertical guide to horizontal guide of the self-propelled drill bit along a guider track within a certain curvature radius is achieved, and then horizontal drilling of the self-propelled drill bit in the coal seam is achieved. The device is simple in structure, convenient to operate and mainly suitable for drilling tree-shaped drill holes in the gas extraction process of the low-air-permeability coal seam.

The invention discloses a construction method of a suspension type steel-structured lighting skylight. The construction method comprises the following steps: (1) assembling a lighting skylight steel structure, wherein the lighting skylight steel structure comprises a steel-structured net frame and a pre-stress truss supported on the lower surface of the steel-structured net frame; (2) carrying out first time of pre-stress tensioning on a pre-stress inhaul cable of the pre-stress truss; (3) hoisting the whole body of the lighting skylight steel structure to a pre-set height and suspending the lighting skylight steel structure on a supporting structure; (4) tensioning the a pre-stress inhaul cable of the pre-stress truss to a designed value. The steel-structured net frame is assembled module by module through adopting a horizontal slippage and jacking manner, the problem that the steel-structured net frame has relatively great weight and cannot be wholly hoisted can be avoided. By adopting a modularized assembling method, construction procedures also can be arranged by adopting a flow line manner, so that the construction time is saved. Each strip-shaped unit is assembled on the surface of a fifth floor, so that the construction engineering quantity of a supporting system and an operation platform is obviously reduced.

The invention discloses a prefabricated frame structure and a cascaded prefabrication construction method thereof. The prefabricated frame structure comprises stand columns (1), main beams (2) connected with the stand columns (1), secondary beams (3) connected with the main beams (2), and floors (5). Prefabricated members are adopted as the main beams (2) and the secondary beams (3) and are provided with reserved exposed steel bars. The floors (5) are laminated slabs, prefabricated slabs (51) are adopted for the lower portions of the floors (5), and concrete is cast on the tops of the prefabricated slabs (51), the main beams (2) and the secondary beams (3) on site so as to connect the prefabricated slabs (51), the main beams (2) and the secondary beams (3) together. By means of the prefabricated frame structure and the cascaded prefabrication construction method thereof, the on-site construction workload can be reduced more effectively, on-site slab nailing can be greatly reduced, and pollution and waste can be reduced; besides, manpower resources are greatly saved; the construction efficiency is effectively improved, and thus the construction period is shortened.

The invention discloses a construction method for an ultra-high-performance concrete corrugated steel web composite box girder bridge. The construction method comprises the steps that a U-shaped groove structural part of each span of box girder is prefabricated according to the design requirements at first; a bridge floor middle plate is prefabricated according to the prefabricated U-shaped groove structural part; a bridge abutment and a bridge pier are constructed, the prefabricated U-shaped groove structural part and the bridge floor middle plate are hoisted in position, transverse connecting steel bars are bound, and after transverse wet joints are poured, the complete box girder is formed; the next bridge pier is constructed, a second box girder is hoisted in position, corrugated steel webs of the adjacent box girders are welded, longitudinal connecting steel bars between the adjacent box girders are bound, longitudinal wet joints between the adjacent box girder segments are poured or a cross girder is casted in place, and a continuous bridge structure is formed; after wet joint concrete reaches the designed strength value, top plate prestressed steel strands are tensioned; and the above steps are repeated, so that the multi-span continuous bridge structure is completed. According to the construction method for the ultra-high-performance concrete corrugated steel web composite box girder bridge, the box girders are light in weight and small in torsional distortion, the bridge floor plate load distribution capacity is good, construction and erection are convenient, and the construction method has wide application prospects in large and middle span bridges.

The invention discloses an existing-road-crossing cast-in-situ trough beam three-point sliding jacking construction method. The method comprises steps of 1, pier and temporary pier construction; 2, slideway beam erection; 3, horizontal crossbeam layout; 4, trough beam cast-in-situ construction; 5, traction device installation; 6, jacking; 7, beam dropping. According to the method, design is reasonable, construction is easy, and the use effect is good; two back slide beams and one front slide beam are used for forming a three-point longitudinal passage, and horizontal cross beams are laid at the bottoms of the front end and the back end of the cast-in-situ trough beam respectively, the problem that deformation of the slide beams on the to sides is asynchronous in existing-road-oblique-crossing cast-in-situ trough beam jacking construction can be effectively solved; in addition, temporary piers are constructed on the two sides of an existing road in the cross bridge direction respectively, the temporary pier construction workload can be effectively reduced, and the cost can be effectively reduced; meanwhile, the influence on use of the existing road can be effectively reduced or evenavoided.

The invention belongs to the technical field of concrete prefabricated floor slabs, and discloses an assembled prefabricated floor slab and a construction method thereof. The assembled prefabricated floor slab comprises a superposed beam and a prefabricated floor slab body spliced by unit board blocks arranged horizontally; connecting grooves are formed in the edges of at least two sides of each unit board block, are located on the upper surface of each unit board block, and are arranged at intervals in the side length directions, a groove segment is formed between two adjacent connecting grooves, the lower surfaces of the groove segments are flush with the lower surfaces of the unit board blocks, and the upper surfaces of the groove segments are not higher than the upper surfaces of the unit board blocks; connecting plates are arranged on the edges of other sides of the unit board blocks; the sides in which the connecting grooves of two adjacent unit board blocks are located are located on the top of the superposed beam and are fixedly connected to the superposed beam through first cast-in-place structures, and transverse reinforcements and ingroove connecting reinforcements are arranged in the first cast-in-place structures; the sides in which the connecting plates of two adjacent unit board blocks are located are oppositely arranged and connected through second cast-in-placestructures. The assembled prefabricated floor slab has good waterproof performance and sound insulation performance, the prefabrication rate is high, and the construction is efficient and convenient.

The invention discloses a formwork support for a cast-in-place concrete plate and relates to formwork engineering of concrete plates. The construction workload of a support system is reduced by adopting a matching tool type bent frame system taking a hybrid structure convenient to assemble in site and locally disassemble as a main framework as the formwork support, hinging combined parts of the hybrid structure by utilizing pre-stress by virtue of a connection structure of a semi-hinge groove, a fixed hinge shaft and a movable sleeve, finely adjusting the lifting of a main structure by using a mechanism frame foundation and adopting the application of strong-stiffness and high-strength support of the hybrid structure to a strong-stiffness large edge. The formwork support is simple in structure, simple and convenient in construction and capable of improving the supporting effect, greatly shortening the operation hour and the time limit of a subentry project and reducing the usage amount of a member material. The formwork support supports local support and early removal of a formwork, and the turnover rates of the formwork and a supporting member are increased. The working reliability of the support system is high, and the fine adjustment for the lifting of the main structure, realized by using the frame foundation, is simple in operation and precise in size, so that the construction quality and safety are ensured.