219results about How to "Extend construction time" patented technology

The invention relates to a method for constructing an engineering pile by combining a rotary drilling rig with manual pile base chambering, which comprises the following steps: (1) preparation work before construction, including field leveling; (2) pile lofting; (3) pile casing embedding; (4) rig installation and rotary drilling; (5) manual pile base chambering; (6) rotary drilling drill quality detection; (7) reinforcement cage manufacturing; (8) reinforcement cage installation; (9) preparation before casting, mainly including hole cleaning, final hole acceptance check, and pump concrete casting quality safeguard measure; and (10) concrete casting, mainly including guide pipe installation, concrete casting and sampling for test and pile forming. In the method for constructing the engineering pile by combining the rotary drilling rig with the manual pile base chambering, the high efficiency of the rotary drilling rig is fully utilized, and the manual pile base chambering is utilized, the advantages of the rotary drilling rig and the manual pile base chambering are combined to make up the defects of the rotary drilling rig and the manual pile base chambering. The construction steps are detailed; the process flow is clear and definite; the construction quality of the engineering pile is ensured through an effective detail measure; the construction process of the rotary drilling rig and the process step of the manual pile base chambering are combined as a whole to realize the effective allocation of a construction field, a construction machine and construction time; and when the construction quality is ensured, the construction efficiency of a digging pile is greatly increased, thereby, the construction time of the engineering pile can be greatly saved, and the construction period requirement of the project is met.

The invention discloses concrete healant, which comprises following components by weight percent: 30 to 55 percent of gelatinization materials, 40 to 65 percent of fine aggregates, 0.1 to 0.5 percent of water reducing component, 0.05 to 0.5 percent of early-strengthening component, 0.05 to 0.2 percent of delayed-coagulation component, 0.2 to 1.0 percent of nano materials, 0.5 to 1.0 percent of high-activity substances, 0.01 to 0.2 percent of water retention thickening component, 0.2 to 2.0 percent of polymer and 0.02 to 0.2 percent of defoaming agent. The concrete healant not only has characteristics of good mobility, fast strength development, high adhesion strength and small retraction, but also can fill active substances into original concrete gaps and can produce compact crystals, so that the cohesion strength of the new and the old concrete interfaces can be remarkably improved, and the concrete healant is applicable to the concrete mending projects of bridges, caves, industrial workshops and civil construction.

The invention discloses a high-performance epoxy resin asphalt warm mixing agent comprising a component A and a component B, wherein the component A is composed of epoxy resin, a reinforcing agent and a coupling agent; the component B mainly comprises a flexible curing agent, an accelerant, a reinforcing agent, a toughening agent and a defoaming agent; and the mass proportion of the component A to the component B is equal to (100:250)-(100:300). High-performance warm mixing epoxy resin asphalt prepared by using the high-performance epoxy resin asphalt warm mixing agent provided by the invention has the characteristics of lower mixing temperature, high strength, better high-temperature ductility resistance and low-temperature fracture resistance, longer construction time, simple construction process, low-carbon and environment friendliness and the like and is suitable for paving pavements of roads, bridges, tunnels, airfield runways and the like. The invention discloses a preparation method of the high-performance epoxy resin asphalt warm mixing agent.

The invention relates to a self-clean self-purification cement-based facing material and a production method thereof. The self-clean self-purification cement-based facing material comprises the following components in parts by weight: 20-30 parts of white silicate cements, 5-10 parts of mineral admixtures, 0-20 parts of quartz sands of 20-30 meshes, 20-30 parts of quartz sands of 40-70 meshes, 20-30 parts of quartz sands of 70-100 meshes, 1-4 parts of kieselguhr, 2-4 parts of zeolite, 0.2-0.6 part of nanometer titanium dioxide, 0.5-2.0 parts of EVA redispersible latex powder, 0.2-0.8 part of organic silicon water repellent, 0-1 part of ferric oxide inorganic pigment and 0.1-0.7 part of other chemical additive. The self-clean self-purification cement-based facing material, provided by the invention, has the advantages of good self-clean property, good self-purification property, good air purification capacity, good adhesive property, good construction property, good endurance quality, higher compression strength and the like, when the self-clean self-purification cement-based facing material is used for decoration of facings of an inner wall space and an outer wall space of a building, the air purification effect and the decoration effect are good, and the self-clean self-purification cement-based facing material can be applied for decoration engineering of all kinds of facings of walls of buildings.

A soft rock and soil layer jet flow guiding hole forming-chamfering-hole collapse preventing integrated drilling method comprises the following steps that firstly, a soft rock and soil layer jet flow guiding hole forming-jet chamfering-hole collapse preventing guniting integrated drilling device is machined and tested; secondly, drilling technical parameters are designed; thirdly, guniting collapse preventing slurry fluid is prepared, and the solidification performance of the slurry fluid is tested; fourthly, the integrated drilling device is installed; fifthly, integrated drilling work is carried out; sixthly, after the design depth is achieved, drilling is stopped, clean water is used for cleaning a guniting pipeline and a slurry liquid nozzle, and a rod bit is pulled out; seventhly, the drilling effect is detected. The drilling efficiency and the hole forming quality of a horizontal or oblique long drill hole in the ground and an underground soft rock soil layer are greatly improved, the construction time for the horizontal or oblique long drill hole in the soft rock soil layer is shortened, and collapse destruction time of the horizontal or oblique long drill hole in the soft rock soil layer is greatly prolonged; the drilling track deviation of the horizontal or oblique long drill hole in the soft rock soil layer is reduced.

The invention discloses a bituminous mixture used for a thin layer overlay of cement concrete pavement and preparation and construction methods of the bituminous mixture. The bituminous mixture comprises mineral aggregate, bitumen, a fiber stabilizer and an additive, wherein filler in the mineral aggregate is copper tailing power. The bituminous mixture has the advantages that the copper tailing power is used as the filler in the bituminous mixture, thus copper tailing is comprehensively recycled. Besides, the bituminous mixture is superior in performances, is easily compacted, and can be paved on the cement concrete pavement for 1.5-2.5cm; the damaged pavement can be quickly repaired after construction; the smoothness and the skid resistance of the pavement are restored; the quality of the pavement is improved; the service life of the pavement is prolonged; driving comfort and safety are improved; the pavement can also be precured; the construction cost is lowered; energy and resources are saved; influences on environment and facilities are reduced; and the like. Moreover, the preparation method and the construction method of the bituminous mixture are simple and practicable, easy to operate and high in practicability.

A full-compensation elastic chain hanging construction method for high-speed rail contact network, which comprises a construction preparing process, a construction measuring process, a software calculating process, a precasting process for sling and dropper, a mounting adjusting process for sling and dropper, and an ending process; each process is equipped with uniform and high-quality construction standards, and is assisted by modern construction meanses for satisfying with technical requirements for construction of high-speed rail contact network of 350 km/h; the software calculating process especially can obtain more accurate pre-stowage data of dropper length via a brand new calculating method finding form based on sling net, and then improve elastic chain hanging construction accuracy for high-speed rail contact net of 350 km/h. So the construction method does not only benefit for improving accuracy of sling and droppser calculation, and the construction method but also has high-quality construction standards and modern construction meanses, and is capable of improving quality and speed of construction of high-speed rail contact net of 350 km/h.

The invention relates to an in-situ warm-mixing regenerant for a bituminous pavement, and a preparation method and a construction method of the in-situ warm-mixing regenerant. The strength of a cold-regenerating mixture is longer in formation time; a finish coat in a certain thickness is required to be paved additionally; the property of the regenerated mixture is poorer; a lower level cold mixing technology is used generally; and cement is required to be added generally, so that the durability of the level is reduced. The in-situ warm-mixing regenerant for the bituminous pavement comprises the following raw materials in parts by mass: 10-30 parts of naphthenic hydrocarbon, 20-40 parts of furfural extract oil, 30-50 parts of deionized water, 10-20 parts of microwave absorption agent, 5-10 parts of surfactant, 5-10 parts of dispersing agent and 1-5 parts of antiaging agent. According to the in-situ warm-mixing regenerant, the preparation method and the construction method, the mixing cost can be lowered; the construction efficiency is improved; a use ratio of old materials is increased; compared with in-situ heat regeneration, the ageing of a bituminous mixture is reduced; the service life of the pavement is prolonged; a cooling rate is reduced; the discharge amount of harmful gas and dust is decreased; new aggregates and new bitumen are not required to be added; and the material cost is lowered.

Solutions for improving efficiency of a filter device for use with a machine requiring clean airflow are disclosed. In one embodiment, the filter device includes: a filter housing about an airflow inlet of the machine, wherein the filter housing comprises an air-permeable filter media configured to filter particles from multi-directional airflow moving through a substantial portion of the filter housing into the airflow inlet.

Provided is a concrete arch bridge arching method which is suitable to be used for a huge-scale concrete railway long span arch bridge. Under the condition of not increasing the cross section size of a main arch ring, the method effectively reduces pressure stress of outer wrapped concrete on the position of the main arch ring, poured in early time, so load carrying of arch rings is more uniform, and related specification requirements are satisfied. A concrete arch bridge comprises a concrete filled steel tube stiff skeleton and an outer wrapped arch ring concrete structure. After pouring of a side box bottom plate of the outer wrapped arch ring concrete structure is completed, a certain range of an arch springing is selected, and a whole-section outer wrapped arch ring concrete structure is firstly formed, and unbalance loading on the main arch ring is adjusted through stretching a certain number of arch springing whole-section outer wrapped segment buckle cables and arch springing whole-section outer wrapped segment back cables, and the arch springing whole-section outer wrapped segment buckle cables and the arch springing whole-section outer wrapped segment back cables are removed after a side box concrete cross section of the outer wrapped arch ring concrete structure is completely formed.

The invention relates to desulfurized gypsum based functional mortar for coating and a preparation method thereof. The desulfurized gypsum based functional mortar for coating comprises the following components in parts by weight: 20-35 parts of desulfurized gypsum, 5-10 parts of S95 superfine slag powder, 50-70 parts of quartz sands, 3-6 parts of kieselguhr, 0.2-0.5 parts of nanometer titanium dioxide, 0.5-1.5 parts of redispersible latex powder, 0.05-0.2 part of cellulose ether, 0-0.2 part of defoaming agent, 0.3-0.8 part of water repellent, 0.5-1.0 part of lithium carbonate early strength agent and 0.02-0.05 part of retarder. The desulfurized gypsum based functional mortar for coating, provided by the invention, has the advantages of good self-purification property, good self-humidifying property, good adhesive property, good construction performance, higher compressive strength and the like, and has good effects of purifying the air and adjusting the humidity when plastering an indoor wall of a building, so that the desulfurized gypsum based functional mortar for coating can be applied for plastering engineering of all kinds of indoor walls of buildings, and a large amount of industrial solid wastes are utilized with lower economic cost, and good environmental-friendly, energy-saving and waste utilization effects.

The invention discloses a multifunctional support trolley for tunnel arches. A scissor lifting table is installed on a trolley platform, general purpose manipulators special for tunnels are installed on two sides of the trolley platform, each general purpose manipulator special for tunnels comprises a telescopic boom, one ends of the telescopic booms are mounted on telescopic boom rotating stands, and the telescopic boom rotating stands are provided with rotating seats and telescopic boom rotating hydraulic cylinders; and one ends of derricking cylinders are installed on the telescopic boom rotating stands, the other ends of the derricking cylinders are installed on the telescopic booms, and manipulators are installed at front ends of the telescopic booms. The multifunctional support trolley has the advantages that installation work of the arches can be finished only by three or four operators, and labor force is saved; the mechanized operation during installation of the arches can be achieved; I-beam arches and grid arches can be lifted to any position in tunnels after being clamped, and arches can be fine adjusted rapidly in all directions; general purpose manipulators special for left and right tunnels work simultaneously, so that rapid installation is facilitated, construction time is greatly saved, and the working efficiency is improved; and the scissor lifting table is installed on the trolley platform, so that other construction operations and tunnel defect treatment besides arch installation are facilitated.

The invention discloses an all-round manipulator special for tunnels. The all-round manipulator special for tunnels comprise a telescopic arm. One end of the telescopic arm is mounted on a telescopic arm rotary support which is provided with a rotating base. The telescopic arm rotary support is provided with a telescopic arm rotary cylinder. One end of a luffing cylinder is mounted on the telescopic arm rotary support, and the other end of the luffing cylinder is mounted on the telescopic arm. A manipulator is mounted at the front end of the telescopic arm. The all-round manipulator special for tunnels has the advantages that the all-round manipulator special for tunnels is mounted on a tunnel arch support trolley, an arch can be mounted by only three or four operators, and labor is saved; mechanical arch erection can be realized, and safety is greatly improved for workers; after I-beam arches and grid arches are clamped, the arches are lifted to any position in a tunnel, the arches can be quickly finely adjusted in front-back, left-right and up-down directions; the left and right all-round manipulators special for tunnels are operated simultaneously, fast mounting can be achieved, construction time is saved greatly, and work efficiency is improved.

The invention relates to inorganic insulating mortar for building energy conservation and its preparation method. The inorganic insulating mortar comprises the following components by weight: 35%-50% of ordinary portland cement, 5%-10% of fly ash, 5%-10% of hydrated lime, 35%-50% of vitrified micro-beads, 0.1%-0.2% of PP (polypropylene) fiber, 0.5%-1.2% of redispersible emulsion powder, 0.2%-0.6% of cellulose ether, 0.03%-0.07% of starch ether, and 0%-0.02% of an air-entraining agent. The thermal conduction coefficient of the inorganic insulating mortar can be adjusted within the grade range of 0.050W/m.K to 0.090W/m.K according to needs. The inorganic insulating mortar of the invention is monocomponent dry-mixed mortar uniformly mixed by lightweight aggregate and powder materials, and not only solves the problems of poor transportation storage stability and easy segregation in this kind of products, but also has the characteristics of excellent construction performance, bonding property, high strength, incombustibility and fire prevention, thermal insulation performance, hollowing and cracking avoidance, as well as low economic cost, etc.

The invention provides a preparation method of a titanium alloy surface sol-gel conversion film layer. In the sol-gel preparation method, the mixture of lower alcohol and water is taken as a solvent, organic siloxane and organic metal alkoxide which comprise organic functional groups are taken as precursors, organic acid is taken as a catalyst, dip coating is taken as a coating mode, and a prepared film layer can enhance the bonding force between a titanium alloy and an organic primer or a bonding agent. The mixture of the lower alcohol and water is taken as the solvent, so that problems of inflammability, safety, volatility and the like of a pure alcohol solvent and problems such as poor sol stability and short working life of a pure water solvent are solved. In the method, the mixture of the lower alcohol and water is taken as the solvent, so that the prepared sol can be kept clarified and transparent for a long time, and the film layer which is obtained by coating within at least one month is uniform and flat and has high bonding force.

The invention discloses rapid ground leveling mortar. The rapid ground leveling mortar is prepared from the following raw materials in parts by weight: 200 to 350 parts of cementing material, 500 to 600 parts of aggregate, 100 to 200 parts of filler, 0.5 to 1.0 part of water reducing agent, 0.3 to 1.0 part of water retaining agent, 0 to 20 parts of latex powder, 0 to 1 part of retarder, 0 to 1 part of early strength agent and 0 to 1 part of anti-foaming agent. The rapid ground leveling mortar has a high levelling property and a high self-healing property, is free from sedimentation and bleeding, has high bonding strength with a base layer, is easy and convenient for ground construction, and can be used for realizing mechanical large-scale rapid construction; meanwhile, accurate ground leveling of 10 to 60mm in thickness can be realized, the single construction thickness is larger than 10mm, and fracturing and hollowing are avoided while the maximum single construction thickness is up to 60mm; people can tread on the ground 2 to 4 hours after construction, the strength can be up to the final strength of ordinary M15 ground mortar after 24 hours, a construction flow is realized, high construction efficiency and low labor strength are achieved, and the ground leveling construction period can be greatly shortened.

The invention belongs to the technical field of spraying polyurea elastic materials, and discloses a polyaspartatepolyurea coating witha moderate surface drying time and adaptability to environmentalchanges, which is prepared from a A material and a B material. The mole ratio of NCO in the A material to NH in the B material is 1.05:1.1. The A material is mainly prepared from,by weight,25-44% of polyether polyol, 55-74% of aliphatic polyisocyanate and 1-5% of nanographene oxide; the B material is mainly prepared from, by weight,70-80% of polyaspartate, 10-15% of nano metal oxide filler, 5-10%of pigment and filler, 1-3% of defoaming agent, 1-3% of leveling agent and 2-5% of adhesion promoter. The invention further provides a preparation method and use method and application of the polyaspartatepolyurea coating. The polyaspartatepolyurea coating has the advantages of being easy to brush, moderate in the surface drying time, and capable of adapting to the environmental changes.

The invention relates to environment-friendly high temperature-resistant inorganic insulated paint and a preparation method thereof and belongs to the field of preparation of coatings. The environment-friendly high temperature-resistant inorganic insulated paint consists of a component A and a component B, wherein the component A consists of the flowing raw materials in percentage by mass: 41 to 44 percent of silica sol, 18.5 to 19.8 percent of inorganic pigment, 5.3 to 6.3 percent of kaolin, 4.4 to 5.0 percent of mica powder, 2.2 to 3.0 percent of talcpowder, 22 to 24 percent of deionized water, and 2.1 to 2.2 percent of aid; and the component B consists of the following raw materials in percentage by mass: 1.0 to 1.2 percent of acetic anhydride and 98.8 to 99.0 percent of methyltrimethoxysilane. During use, the component A and the component B are stirred and mixed in a ratio and cured; and then a mixture is subjected to air spraying onto metal base materials such as aluminum alloy, stainless steel and the like which are treated. The paint has the advantages of environment-friendliness, high temperature resistance and insulativity, acid and alkali resistance, long normal temperature quality guarantee period, long construction time and the like, and can be cured at normal temperature.

The invention discloses an autoclaved aerated concrete plate repairing agent and belongs to the technical field of building materials. The autoclaved aerated concrete plate repairing agent is composed of, by mass, 40-60% of coal ash, 10-30% of gypsum, 5-15% of cement, 10-30% of sand, 0.01-2.0% of fiber, 0.01-1.05 of water retaining agent and 0.01-1.5% of setting retarder. The coal ash is coal ash for silicate building products meeting JC/T, the gypsum is semi-hydrated gypsum, and the cement is universal silicate cement meeting GB. By the autoclaved aerated concrete plate repairing agent, the problem that an existing repairing agent and an autoclaved aerated concrete plate have chromatic aberration and are low in binding strength and long in setting time.

The invention relates to a special type water-based epoxy floor paint as well as a preparation method and an application thereof. Specifically, the invention discloses a dual water-based epoxy floor paint product containing a first container and a second container, wherein the first container contains a component A which comprises 10-50 parts by weight of a modified water-based epoxy curing agent, 25-70 parts by weight of a pigment filler, 0.01-10 parts by weight of a dispersant, 0.01-5 parts by weight of an organic silicon type defoaming agent and 0.01-5 parts by weight of an optional wetting leveling agent; and the second container contains a component B which comprises 60-150 parts by weight modified water-based epoxy resin. The invention also discloses a preparation method and an application of the dual water-based epoxy floor paint product. The dual water-based epoxy floor paint has the characteristics of being environment-friendly and safe, and being good in storage stability, good in coating property and easy in construction, a paint film after coating is high in hardening speed, and the obtained paint film has excellent weathering resistance and chemical resistance.

The invention discloses a translation construction structure of a shield machine, and a translation method. The translation construction structure of the shield machine comprises two guide rails arranged at the bottom of a tunnel translation construction section, a plurality of rolling wheels with the same mounting height and a driving device for pushing the shield which needs to be translated to move forwards; the plurality of rolling wheels are arranged on a shield body of the shield machine; a pair of rolling wheels are arranged on each of a front shield and a tail shield of the shield machine; at least two pairs of rolling wheels are arranged on a middle shield of the shield machine; the driving device comprises a thrust mechanism and a counter-force mechanism. The translation method comprises the following steps: 1, determining the pavement length of the guide rails; 2, paving the guide rails; 3, translating the shield machine. The rolling wheels are directly fixed on the shield machine, a bracket trolley is replaced, the height required by translation of the shield machine is reduced, secondary construction of the existing tunnel is avoided, the problem that the supporting strength is reduced caused by change of a supporting structure is solved, the problem of translation of the shield machine is solved, and the construction process is simple and high in speed.

The present invention provides a rapid drying casting material for a blast furnace iron runner, and a preparation method thereof. According to the casting material, bauxite clinker, corundum, silicon carbide powder, corundum powder, and alumina micro-powder are adopted as main materials, a binder and explosion-proof fibers are adopted as auxiliary materials, the bauxite clinker, the corundum and the silicon carbide are subjected to material preparing according to a certain ratio, and added to a mixer to carry out stirring mixing, then the explosion-proof fibers prepared according to a certain ratio are added to the mixer to stir, the corundum powder and the alumina micro-powder are added to mix, the binder is added to mix the powder, uniform mixing is performed, the mixed rapid drying casting material is filled into a moisture-proof package bag, and the bag is sealed and placed in a dry place. Compared with the rapid drying casting material in the prior art, the rapid drying casting material of the present invention has the following advantages that: the preparation method is simple, rapid construction, rapid baking and rapid iron discharging can be achieved, characteristics of good rapid drying explosion-proof performance, good slag iron erosion resistance, and good thermal shock stability are provided, material cost is reduced, the iron runner construction and maintenance time is shortened, the blast furnace utilization coefficient and the yield can be effectively increased, and a service life of the iron runner casting material working layer can be prolonged.

Methods for manufacturing a composite concrete structure are provided. A method can include utilizing a shell formwork with a displacement piece positioned therein. A first type of concrete can be placed in the shell formwork around the displacement piece. The displacement piece, when removed, leaves a void that is tillable with a second type of concrete for form the composite concrete structure. A reinforcement cage or reinforcement rods can be incorporated into the void prior to placement of the second type of concrete.