34results about How to "Prevent frost heave" patented technology

The invention relates to a building waterproof heat-preservation exhaust compound system, which comprises a heat-preservation layer, a waterproof layer, a waterproof protective layer and an exhaust passage, and is characterized in that the heat-preservation layer comprises paved heat-preservation boards, the lower surfaces of the heat-preservation boards are provided with exhaust grooves, the exhaust grooves of all the heat-preservation boards are connected into the exhaust passage, one end of the exhaust passage is connected into a flue through a connecting pipe, and the waterproof layer and the waterproof protective layer are covered on the heat-preservation layer in turn. The building waterproof heat-preservation exhaust compound system has the following advantages that: the system is a heat-preservation waterproof moisture-proof exhaust system for roofs and the floors, which uses a JWG-M type to seal and resist water for EPS and XPS heat-preservation boards, is communicated with the flue through the exhaust grooves of the EPS and XPS heat-preservation boards, and exhausts moist air in time by the pipeline effect of the flue so as to achieve waterproof heat-preservation exhaust integral roofs. Simultaneously, the system removes the vertical exhaust pipes arranged on the roofs and reduces the hidden danger of seepage, and the roofs are smooth to prevent frost heave and gas heave so that the deserved effective service life of the waterproof and heat-preservation roofs is achieved. Besides, the system has good heat-preservation and waterproof effects.

Disclosed is a tunnel lining concrete heat preserving and maintaining construction device. The tunnel lining concrete heat preserving and maintaining construction device is characterized by comprising a first trolley, a second trolley and a third trolley which are sequentially connected, or comprising a first trolley and a second trolley which are sequentially connected, or comprising a second trolley and a third trolley which are sequentially connected, or comprising a first trolley and a third trolley which are sequentially connected, wherein the three trolleys are each provided with a template supported through a supporting rod. The tunnel lining concrete heat preserving and maintaining construction device has the advantages that the three construction trolleys conduct heat preservation on secondary lining at first, the temperature difference between the interior and the exterior is decreased, then, heat preservation and moisture retention are carried out on concrete, concrete frost heaving is avoided, and finally the concrete is slowly cooled through a cooling layer, so that the quality problem generated by the large temperature difference between pre-construction and post-construction is avoided. The tunnel lining concrete heat preserving and maintaining construction device has the advantages of being stable in construction quality and low in manufacturing cost and has the wide market prospect.

The invention provides a plate spliced pervious roadbed made by utilizing waste plastics. The waste plastics comprise propylene, polyethylene, polypropylene, polyvinyl chloride and the like. Accordingto the current market conditions, the polyethylene plastics account for 50% of the waste plastics and belong to thermoplastic resin polymers. Therefore, the thermoplastic waste plastic products can be selected to produce and make the plate spliced pervious roadbed. Bulges and grooves of multiple shapes are formed in the left and right sides of the pervious roadbed plate, so that two adjacent pervious roadbed plates are inserted together. Drill holes through which steel strands penetrate are formed in the upper and lower sides, and the pavement can be tight and stable when the steel strands are connected together. A plurality of bulges are arranged on one side, which is close to the pavement, of the roadbed plates and can be matched with the plate spliced pavement, so that the bulges on the roadbed blocks are inserted into the grooves in the pavement panel so as to achieve an excellent stabilizing effect.

The invention is applied to the technical field of subgrade engineering and provides an internal circulation type solar heating device for a subgrade. The axis of a metal heat collecting pipe is superposed with that of a glass tube; two ends of the metal heat collecting pipe and two ends of the glass tube are all connected by bellow expansion joints in a sealing manner; each of the two ends of themetal heat collecting pipe is respectively connected with a metal heat collecting pipe joint; the metal heat collecting pipe joints extend to the outer sides of the bellow expansion joints; the top end of a metal heat supply pipe is communicated with the metal heat collecting pipe joint at the bottom end of the metal heat collecting pipe through a threaded connector; a cone head guiding cap is arranged at the bottom end of the metal heat supply pipe; a circulating pump is driven by a solar cell to operate; an inlet of the circulating pump is communicated with the metal heat collecting pipe joint at the top end of the metal heat collecting pipe; an outlet of the circulating pump is communicated with an inlet of a circulating pipeline; an outlet of the circulating pipeline penetrates through the threaded connector and extends to the bottom of the metal heat supply pipe; the metal heat supply pipe and the metal heat collecting pipe are internally filled with heat transfer fluid. The problem of poor anti-frost heaving effect of the subgrade in the prior art is solved.

The invention provides a cold region earth-rock dam anti-frost-heaving structure and further provides a construction method of the cold region earth-rock dam anti-frost-heaving structure. A slope protecting structure and a novel anti-frost-heaving structure are arranged along the upstream dam slope. The slope protecting structure comprises cast-in-place concrete structures, sand gravel cushion layers and geomembranes which are laid at the dam bottom and the dam top correspondingly. The novel anti-frost-heaving structure comprises a tempered glass heating plate, a photovoltaic cell panel, an LED light-emitting indicator layer, a solar charger, a storage battery, light-controlled heating switches, a basic stratum, a reinforced concrete wall and pre-embedded steel bars. The cold region earth-rock dam anti-frost-heaving structure has the beneficial effects that the novel anti-frost-heaving structure is utilized for heating and warning to achieve the anti-frost-heaving effect, and comparedwith a conventional earth-rock dam anti-frost-heaving structure, the characteristics of good anti-frost-heaving effect and the like are achieved.

The invention discloses an anticorrosion and wear-resistant floor for a garage. The anticorrosion and wear-resistant floor for the garage comprises a wear-resistant paint layer, an anticorrosion layer, a special aggregate emery wear-resistant coating, a reinforced concrete layer, a cement mortar protective layer mixed with SBS, a PE film waterproof layer, a XPS moisturizing layer, another PE filmwaterproof layer and a cement mortar leveling layer which are arranged from top to bottom; the anticorrosion layer includes a binder, a toughening agent, an antifoaming agent, a leveling agent, a curing agent, a preservative, and a filler; and the binder is an epoxy resin, the toughening agent is a dioctyl phthalate, the antifoaming agent is polyglycol ether, the leveling agent is polymethylphenylsiloxane, the curing agent is triethanolamine, the preservative is a sodium benzoate, and the filler is polytetrafluoroethylene. The anticorrosion and wear-resistant floor for the garage has the advantages of slip resistance, waterproof, wear resistance and scratch resistance, and meanwhile, the anticorrosion and wear-resistant floor is provided with the functions of good corrosion resistance andheat preservation, so that the floor can be effectively prevented from frost heave and the construction operation and management are convenient.

The invention relates to an anti-frozen-heaving heat pipe using an elastic material, which is capable of withstanding multiple times of freezing and thawing cycle without fracture. A structure of the heat pipe comprises: an elastic rod is placed in a liquid bath in an evaporation section of the heat pipe, wherein the material of the elastic rod has elastic property; the density of the material of the elastic rod is higher than that of water; and the contraction deformation of the elastic rod is more than or equal to the swell capacity of the water when the elastic rod performs solid-liquid phase change in the water. The heat pipe overcomes the defects that in the past, when the frozen heaving happens, a core heat transfer component of a heat pipe solar water heater, namely the heat pipe may have the phenomenon of pipe cracking to cause that the heat pipe has no effect and the whole solar water heater is damaged and cannot work normally. The heat pipe arranges the elastic rod on the evaporation section of the heat pipe from the angles of the structure the material mechanics; and the elasticity of the material of the elastic rod is used to absorb the swell capacity generated in the process of curing liquid in the liquid bath to protect the pipe wall of the heat pipe from being damaged and realize preventing the frozen heaving of the heat pipe. The heat pipe has the advantages of simple structure, quite good effect and high practical value.

The invention provides a self-circulation frost heaving prevention heat gathering device and a roadbed thereof, and relates to the technical field of disease prevention and control of engineering construction in a seasonal frozen soil region. The self-circulation frost heaving prevention heat gathering device comprises a solar heat absorption box, a circulation power unit and a heat gathering pipe which sequentially communicate end to end through a circulation pipe to form a circulation loop, the circulation loop is filled with a circulation working medium, and the heat gathering pipe is used for being inserted into the roadbed and transferring heat of the circulation working medium into the roadbed. Therefore, the solar heat absorption box absorbs solar radiation energy and converts the solar radiation energy into internal heat energy to heat the circulation working medium. The circulation power unit pushes the heated circulation working medium to flow to transfer heat. The heat gathering pipe continuously releases heat in the roadbed to heat a soil body around the heat gathering pipe, so that the roadbed is always in the process of net heat absorption and continuous accumulation of internal heat, the internal heat of the roadbed is collected, the temperature is always kept in a positive temperature state, and the purpose of preventing and treating engineering diseases such as roadbed soil body freezing and roadbed frost heaving is achieved.

A playing surface comprising a supportive base layer, an intermediate layer such as a foam layer, and a surface layer, wherein the base layer is configured to provide the playing surface with a first predetermined amount of stability and the intermediate layer, e.g. foam layer, is configured to provide the playing surface with an additional, second predetermined amount of stability, the intermediate layer, e.g. foam layer, being further configured to conform to a required performance standard. And a method of constructing a playing surface.

The embodiment of the invention provides a roadbed slope protection device and a railroad bed, and the roadbed slope protection device comprises: a plurality of foam concrete precast blocks which areused for being assembled and laid along the surface of a roadbed slope and are fixed on the roadbed slope; and drainage structures which are arranged on the foam concrete precast blocks and used for enabling water on the surface of the roadbed to be drained to the two sides of the roadbed through the drainage structures. The roadbed slope protection device and the railroad bed provided by the embodiment of the invention can protect the railroad bed in a cold region, can prevent the railroad bed from collapsing due to rain wash, and also can preserve heat of the railroad bed to prevent frost heaving of the railroad bed.

The invention discloses a foundation pit side wall frost heaving prevention method, and belongs to the technical field of building construction. The side wall of a foundation pit is provided with a water draining hole, the water draining hole is a metal pipe draining pipe, a water draining hole is formed in the metal pipe, the outer portion of the segment, inserted into the soil on the side wall of the foundation pit, of the metal pipe is wrapped with water filter gauze, the metal pipe is connected with a power cathode, a metal bar is connected with a power anode, the metal bar corresponds tothe metal pipe on the same side, the ground surface of the position, between the metal bar and the side wall of the foundation pit, of the upper portion of the foundation pit is provided with waterproof geotechnical cloth, the metal pipe is connected with the power cathode, the metal bar is connected with the power anode, the metal pipe and the metal bar are correspondingly mounted, water in soilcan be smoothly drained, and through a method of reducing the water containing amount in the soil, soil frost heaving damage to the side wall of the foundation pit can be prevented.

The invention relates to a test device for simulating a pipeline mechanical reaction in a frozen soil environment, the test device is provided with an outer box body, a refrigeration box body and a test box body, the refrigeration box body is arranged in the outer box body, the test box body is arranged in the refrigeration box body, a support frame is fixed at the bottom of the test box body, anda buried pipeline for testing is fixed on the support frame, a foil gauge is attached to the bottom of the buried pipeline, an observation window is formed in the side wall of the outer box body, a strain line output port connected with the foil gauge through a line is formed in the observation window, a vertical displacement measurer is arranged on the buried pipeline, the scale display end of the vertical displacement measurer is located at the observation window, and the periphery of the buried pipeline is wrapped with a flexible protective sleeve. According to the invention, the mechanical reaction and displacement change process of the buried pipeline under the conditions of different types, different depths and different angles in a frozen soil environment can be simulated, and a test basis is provided for the damage cause analysis of the buried pipeline in the frozen soil environment.

The invention discloses a pavement structure for renovating and transforming a rural waste cement concrete road and a filling method of the pavement structure. The pavement structure comprises an asphalt surface layer, a graded broken stone layer and a regenerated broken stone layer which are arranged above a soil matrix from top to bottom, v-shaped regenerated gravel drainage ditches are formed in the two sides of the regenerated gravel layer and filled with regenerated gravel; road shoulders are arranged on the two sides of the pavement structure and extend from the asphalt surface layer to the recycled gravel drainage ditch; and plant fiber grids surround the periphery of the graded broken stone layer. According to the invention, the rural waste cement concrete road pavement material is fully utilized to form the regenerated gravel layer and the regenerated gravel drainage ditch, so that the pollution to the environment is reduced, the waste material is fully utilized, and the road drainage can be further accelerated. The application of the plant fiber grating effectively enhances the structural strength of the pavement, reduces the generation of various cracks, and improves the quality of the asphalt pavement, thereby prolonging the service life of the asphalt pavement, reducing the maintenance cost of the road, optimizing the comprehensive benefits of road operation, and having important significance for promoting the development of rural economy.