41results about How to "Reduce the technical difficulty of construction" patented technology

The invention discloses a mixed reinforced retaining wall. The mixed reinforced retaining wall comprises an ordinary wall panel, a prestressed wall panel, a wall panel base, non-bonding prestressed tendons, side pressing plates, geogrids and filler, wherein the ordinary wall panel and the prestressed wall panel are supported on the wall panel base; the prestressed wall panel is connected with the non-bonding prestressed tendons; the ordinary wall panel is connected with the grogrids; one or more grogrids are arranged between the two vertical non-bonding prestressed tendons; one ends of the non-bonding prestressed tendons are connected with the side pressing plates; and the other ends of the non-bonding prestressed tendons are stretched and anchored on the prestressed wall panel. According to the mixed reinforced retaining wall, a traditional reinforced soil technology is combined with a non-bonding prestressed reinforcement technology, the filler is passively restrained by reinforced soil fraction through the traditional reinforced soil technology, the active restraint strengthening action, of the non-bonding prestressed reinforcement technology, on the filler is exerted as well, economy of the non-bonding prestressed reinforcement technology is improved, and construction difficulty of the non-bonding prestressed reinforcement technology is reduced as well.

The invention discloses a combined cofferdam structure and a building construction method thereof. The combined cofferdam structure is composed of earth rock cofferdams in shallow water areas on the two sides of a riverway and a steel plate pile cofferdam in a deep water area in the center of the riverway. The steel plate pile cofferdam is located between the earth rock cofferdams on the two sides, and composed of a plurality of sets of main cofferdam grids and auxiliary cofferdam grids filled with gravel in a spaced and continuous mode. A foundation covering layer which is formed by manually throwing and filling the gravel and used for locating a steel plate pile is arranged on a riverbed at the bottom of the steel plate pile cofferdam. The construction method comprises the steps that the locating foundation covering layer is formed by throwing and filling the gravel, the steel plate pile is inserted and driven, the cofferdams are closed, the cofferdam grids are filled with the gravel in a throwing mode, and consolidation grouting or high-pressure whirl-spray grouting seepage-proofing construction is carried out. The steel plate pile is embedded in the combination portions of the earth rock cofferdams and the steel pipe pile cofferdam to be fixedly connected with the structure, the two structural bodies are fused well, and the overall cofferdam structure is more stable. The locating foundation covering layer is formed, mounting groove underwater construction is not needed in the method, and efficient and high-quality cofferdam construction is achieved.

The invention discloses a construction method for steel sheet pile cofferdam on an underwater exposed bedrock. According to the method, steel sheet pile cofferdam can be constructed without grooving the exposed bedrock on an underwater plane. A covering layer is formed through sand filling, a construction environment that the covering layer is formed underwater is built, then a conventional steel sheet pile cofferdam construction technique is adopted directly, and steel sheet pile cofferdam construction is finished. The work of formation of a mounting groove through drilling on the water surface is omitted, the construction cost is effectively reduced, the construction cycle of a project is shortened, and the work efficiency is improved; a basic covering layer for steel sheet pile positioning is formed through sand throwing and filling, the construction environment that a covering layer is formed on the exposed bedrock underwater is built, steel sheet piles are subjected to insertion and closure construction, and then steel sheet pile cofferdam construction is completed. The method does not require underwater construction of mounting grooves, the steel sheet piles are accurately positioned, the difficulty of the construction technique is small, requirements for equipment are reduced, and high-efficiency and high-quality cofferdam construction is realized.

The invention discloses a hydraulic fracture and microwave radiation combined coal bed gas enhanced extraction device and method, and belongs to surface borehole coal bed gas extraction devices and methods. A sleeve is arranged in a borehole fixing section, the lower end of the sleeve is provided with a high-strength nonmetallic screen pipe, and the upper portion of the sleeve is provided with a hydraulic facture opening, a gas extraction opening and a microwave radiation monitoring opening; a water pump is connected with the hydraulic fracture opening through a water tank and a pipeline, and a hydraulic fracture opening valve is arranged on the hydraulic fracture opening; a gas extraction opening valve is arranged on the gas extraction opening; a signal transmission line, a waveguide pipe and a microwave radiation monitoring opening valve are arranged on the microwave radiation monitoring opening, one end of the signal transmission line is connected with a monitoring device, and the other end of the signal transmission line is connected with a sensor; one end of the waveguide pipe is connected with a microwave radiator through a waveguide pipe valve, and the other end of the waveguide pipe is connected with a microwave radiation antenna and a microwave radiation window. Through the combined effect of hydraulic fracture and microwave radiation, coal bed permeation is achieved, the desorption efficiency of coal bed gas is improved, and high-efficiency extraction of coal bed gas is promoted.

The invention discloses a multifunctional split bolt and application thereof. Steel plates are penetratingly mounted at two ends of a bolt bar. The bolt bar is fixedly connected one steel plate by means of welding. A pair of positioning clamps for fixing rebar positions is welded on the bolt bar between the two steel plates. Fastening nuts are fitted at two ends of the bolt bar. When the split bolt is used in a composite structure with building prior to pouring, construction speed is increased, construction efficiency is improved, bonding degree and tightness of interfaces of different materials are enhanced, overall performance of a structure is improved, usability of the structure is more reliable, maintenance is reduced, service life of a project is prolonged, accuracy and reliability of rebar protective layer control are higher, soakage resistance and erosion resistance of concrete is guaranteed to be more reliable, formwork mounting and strengthening are more convenient and faster, influence of building verticality and evenness can be eliminated, construction accuracy is higher, common signal side formwork lateral supports can be reduced, construction difficulty can be lowered, cost is saved, and the split bolt is suitable for double-side formwork construction and embedded part positioning mounting of walls and board components.

An anti-seepage and anti-salt corrosion cement, concrete and a preparation method thereof; the anti-permeability and anti-salt corrosion cement concrete contains bentonite and a bentonite conditioner, the conditioner is activated silica powder and The mixture of water reducer, the mass ratio of bentonite, activated silica powder and water reducer is: bentonite: activated silica powder: water reducer=100:3~30:0.3~3.5, impervious to salt The total content of the corrosion component bentonite and bentonite conditioner is 5% to 20% of the total weight of the cement. The invention also includes the preparation method of the anti-permeability and anti-salt erosion cement and concrete. The anti-seepage and anti-salt corrosion cement and concrete of the invention have good anti-permeability and anti-salt corrosion effects, low cost and good economy, and are beneficial to reduce the construction cost of the anti-seepage and anti-salt corrosion project and improve the project quality.

The invention belongs to the technical field of building of high speed railway ballastless tracks, and particularly relates to a self compact concrete fast moving production and construction method for a CRTSIII type ballastless track. The method comprises the steps that dry materials are firstly produced in a centralized manner in a factory according to the design proportion and stored; the construction modes matching a movable mixer truck are determined according to field conditions before construction and comprise pumping, crane bucket conveying, line-to-line carrier transferring construction and the like; material supply vehicles and water supply vehicles are organized for conveying the materials according to the work amount of the current day in the construction process and produce self compact concrete with the movable mixer truck at the construction site according to needs, and self compact concrete grouting construction is carried out through the selected construction modes; and meanwhile, the position of the movable mixer truck is adjusted in real time according to the construction progress, and the mixer truck is replenished with the materials in time through the material supply vehicles and the water supply vehicles till construction is finished. The method has the beneficial effects that the construction efficiency is high, the waste rate of self compact concrete is low, and good applicability is achieved; and the method is suitable for various bridges, roadbeds and tunnel structures under all the working conditions.

The invention discloses an opening built-in door and window structure for a passive building external wall external thermal insulation system. The opening built-in door and window structure comprises a door and window body positioned in a door and window opening, a window frame of the door and window body is divided into an upper frame, a lower frame, a left frame and a right frame, a waterproof breathable roofing underlayment is pasted on the periphery of one indoor side of the window frame, connectors are mounted at four rims, the door and window body is fixed to the door and window opening through the connectors, damp-proof thermal insulation cushion blocks are arranged at mounting positions of the connectors and the door and window opening, a waterproof breathable film is pasted on the periphery of the outer vertical surface of one outdoor side of the window frame, thermal insulation rubber strips are continuously pasted at lapping edges of the rims of the upper frame, the left frame and the right frame and an external thermal insulation layer, the lower frame is provided with a water drip, and a window sill is fixed below the water drip. The door and window structure is convenient to mount, low in construction technical difficulty, small in labor input, high in operability, rapid in construction, high in work efficiency and remarkable in economic benefit, and convex-concave joints between the door and window frame and the door and window opening are decreased.