37results about How to "Improve construction productivity" patented technology

The invention provides a cold-mixed and cold-laid asphalt mixture, and a cold-mixed and cold-laid asphalt mixture wearing layer, and belongs to the technical field of road engineering. The cold-mixedand cold-laid asphalt mixture comprises coarse aggregates, fine aggregates, high-performance modified emulsified asphalt, a mineral filler, water and a liquid additive. The asphalt mixture prepared from above cold-mixed and cold-laid material components according to a special mineral grading range can be closely bonded to an old asphalt pavement and a cement pavement; and compared with traditionalmicro-surfacing and super-sticky wearing layer materials, the mixture has higher resistance to crack, water and skid and lower driving noises.

The invention relates to an assembled supporting frame for prefabricated stair performance detection. The assembled supporting frame comprises a height-adjustable bearing beam. The bearing beam is used for bearing a prefabricated stair, and the two ends of the bearing beam are detachably connected with supporting pieces. The bottoms of the supporting pieces are detachably connected with stabilizing supports. The height of the bearing beam can be adjusted according to the height of a prefabricated stair component, the assembled supporting frame is suitable for prefabricated floor components with different sizes, the effect that the device is recycled is achieved, different supporting devices do not need to be designed for the components with different sizes, the detection cost of the prefabricated stair component can be effectively reduced. Moreover, the assembled supporting frame is simple in structure, convenient to use and low in manufacturing cost, all components can be disassembledand assembled to achieve the purposes of convenient transportation and on-site installation, rapidness and convenience are achieved, and therefore the completion efficiency of performance testing ofthe prefabricated stair component can be greatly improved, and the improvement of the construction production efficiency of a prefabricated building is promoted.

The invention discloses a novel square steel tube column-H-shaped steel beam splicing outer sleeve type connecting method. A square steel tube column, a U-shaped splicing outer covering plate, high-strength bolts, high-strength core penetrating bolts, splicing cover plates, cantilever H-shaped steel short beams, H-shaped steel beams, plug welding holes, outwards-turning lug plates and core penetrating bolt holes are mainly related. The structure is simple, the construction is convenient, the good anti-seismic property is achieved, the procedures at the site construction stage are simplified and are carried out easily, the construction production efficiency is effectively improved, the construction time is shortened, and the construction cost is saved.

The invention discloses a self-propelled concrete spraying machine with a spray head with functions of automatic rotation and traction. The spraying machine comprises a sled with a sled plate, and a concrete feeding device, with a material mixer, arranged on the sled plate. The material mixer is driven by a driving device to rotate, and the driving device is mounted on the sled plate. Concrete in the concrete feeding device is delivered from the material outlet of the material mixer to a rotary spray head through a pipeline. The concrete spraying machine is mounted on the sled, the material mixer is driven to rotate through the driving device, the concrete is delivered from the material outlet of the material mixer to the rotary spray head through a landscape channel, the trenchless culvert maintenance and reinforcement construction technology is adopted for the entire device, adverse effect on normal road traffic operation is omitted, construction shortcut constructing cost and increased cost due to vehicle detouring are reduced, construction producing efficiency is improved greatly, manual labor is reduced, construction quality is improved, and adverse effect to worker by dust is avoided.

The invention relates to the field of building operations, in particular to a device for hoisting prefabricated reinforced concrete column on site and a walking technology thereof. The purpose of the invention lies in providing a simple yet effect walking technology for hoisting prefabricated reinforced concrete column on site and the device for realizing the technology; the design is simple and the operation is effective. To achieve the purpose, the invention provides the following technical proposal: the device of the invention is composed of a wheeled supporting plate, steel sheets and braking angle iron and has the following characteristics: the supporting plate is a right-angle structure, the top of the right angle is provided with deflectable rolling-over wheels, the two ends of thesupporting plate far away from the top of the right angle are respectively provided with deflectable wheels, rotary connecting rods are arranged on a deflectable wheel seat. With the device of the invention adopted, mechanical efficiency can be effectively improved, construction productivity can also be enhanced, thus accelerating construction progress and enjoying extremely noticeable economic benefits and comprehensive benefits.

The invention discloses a damping spring vibration isolator device with expansion sleeves. The device comprises an upper bearing plate component, wherein the upper bearing plate component and a lower bearing plate component are connected with an upper sleeve and a lower sleeve for mounting a damper component; the upper and lower ends of the damper component are connected into the upper sleeve and the lower sleeve through the expansion sleeves respectively; the bottom of the lower bearing plate component is connected with a height adjusting component. A mounting and adjusting construction method of the damping spring vibration isolator device with the expansion sleeves comprises the following steps: assembling the damping spring vibration isolator device with the expansion sleeves; arranging the damping spring vibration isolator device with the expansion sleeves at an equipment foundation; adjusting height, releasing pre-compression of the spring and adjusting the height again. The damping spring vibration isolator device with the expansion sleeves can be locked after the upper and lower bearing plate components and the spring are assembled and the pre-compression is applied, and is convenient to assemble and reliable to connect; the length of the damper and the height of the vibration isolator are rational; the damping spring vibration isolator device with the expansion sleeves is adjustable in height; the mounting and adjusting construction method is simple and convenient; the precision is guaranteed; the construction efficiency is favorably improved; the construction period is shortened.

The invention discloses a technique for fast filling a constructed wetland in a shore area. A jetty and a separation cofferdam are adopted to divide the wetland into a plurality of hydraulic reclamation areas as required; each hydraulic reclamation area is constructed independently, so that the construction production efficiency is improved and the construction period is shortened. A bucket-wheel type dredger instead of a common cutter suction dredger is adopted to perform hydraulic reclamation construction, the discharged soil is small blocks, has the characteristic of partial saturation, is relatively shorter in solidification time, and can meet the requirement of planting plants in the wetland in short time. The bucket-wheel type dredger is utilized to borrow earth from a lake region, and the borrow pit of the separation cofferdam is filled and leveled up in an equal quantity replacement manner by adopting the hydraulic reclamation manner, so that the production efficiency is effectively improved, the project cost is reduced, and the cost is decreased. A high-strength geotechnical cloth is arranged on the inner side of the jetty, so that the hydraulic reclamation earthwork in the wetland is prevented from entering the lake region through the holes of the jetty, and the pollution to the lake water is reduced; the water permeability of the high-strength geotechnical cloth enables the water bodies of the wetland and the lake to communicate, and the influence on the wetland environment is avoided.

The invention discloses a quick-drying high-solid polyurea coating material, and a preparation method and application thereof. The quick-drying high-solid polyurea coating material comprises the following materials, in parts by weight: 20-45 parts of modified polyaspartic ester resin, 15-35 parts of isocyanate curing agents, 5-15 parts of composite anti-rust pigment, 10-45 parts of a pigment filler, 1-5 parts of an auxiliary agent and 5-15 parts of a solvent, wherein the modified polyaspartic ester resin is prepared from amino monomers, maleic anhydride and alcohol monomers according to a molar ratio of 1:(1.8-2.3):(3.8-4.9). According to the invention, the above specific components and the component contents of the quick-drying high-solid polyurea coating material match perfectly, thus the quick-drying high-solid polyurea coating material provided by the invention has excellent mechanical properties, corrosion resistant performance and decorative performance, and can obviously improve construction production efficiency, and reduce construction time, energy consumption, VOC emissions and labor costs.

The invention provides a method for judging the positional relationship between the shield tail and the segment of a large-diameter shield. In the early stage of construction, according to the design drawing of the shield machine manufacturer, the stroke of the propulsion cylinder and the hinge stroke of the selected four points are calculated through the spatial geometric relationship. Calculation formula, further calculate the vertical position relationship formula between the segment and the shield tail according to the calculation formula of the stroke of the propulsion cylinder and the stroke of the hinge cylinder; establish an EXCEL table, and calculate the stroke of the push cylinder, the stroke of the hinge cylinder, and the stroke of the push cylinder and the hinge cylinder of each partition The stroke calculation formula and the judgment formula for the positional relationship between the segment and the shield tail are input into the form, and then imported into the upper computer of the shield machine to judge the positional relationship between the shield tail and the segment. The invention optimizes the basis for judging the type selection of the segments, and helps to improve the tunnel forming quality and construction efficiency.

The invention discloses a construction process for a soft weak foundation cement mixing pile in a plateau extremely cold marshland area. The construction method comprises the following steps: firstly,detecting the alkalinity or acidity of underground water; secondly, constructing a working platform on a soft weak foundation in a marshland area; thirdly, equipment selecting and modifying; and fourthly, constructing by adopting a four-mixing two-spraying process. The construction process solves the problems that corrosion exists, the penetration speed is low, the construction quality cannot meet a requirement, construction equipment is easy to tilt and the like in the existing construction process, and achieves the purposes of safety, quickness, and meeting various technical indexes of a cement mixing pile in a plateau extremely cold marshland salty soil area.