33results about How to "Additional load is small" patented technology

An elastic member for a pushbutton switch, providing soft tactile sensation to the operator when it is pushed down. The elastic material for a pushbutton switch has a base, a connection section extending from the base, a pressing section supported above the base by the connection section, and a projection section projecting downward from the pressing section. The inside of the projection section is hollow.

The invention discloses the structure, design and construction method of the light subgrade of the bridge under the operation. Long piles, double rows of long piles are arranged longitudinally along the line and close to the bridge foundation relative to the short piles. The quality trough is set on the top of the light body, and the U-shaped light trough is filled with soil filler. The upper part of the long pile and the short pile is anchored into the connecting steel bar. Structure, the reinforcement layer is fixedly connected with the connection reinforcement. Lightweight soil materials have low density, strong compressive capacity, and upright appearance. This method can achieve the purpose of building subgrades under bridges, ensure the normal use of bridge structures, and ensure the safe operation of various vehicles on the bridge. Local economic construction saves land and can also reduce ecological environment damage.

The invention discloses a method for treating a concrete face rockfill dam void. The method includes the specific steps that (1), non-destructive testing of a void situation of the concrete face rockfill dam is carried out; (2), grouting holes are drilled in a void area with a diameter of 2-5 cm, and the distance between the adjacent grouting holes is 20-50 cm; (3) a high polymer material is injected into the void area through the grouting holes; and (4) at least one method of infrared thermal imaging, ground penetrating radar and a sound wave reflection method is used for evaluating the performance of the treatment location of the concrete face rockfill dam and determining the grouting effect, grouting is stopped if requirements are met, and if the requirements are not met, the grouting need to be supplemented to meet the requirements, and the void treatment is completed. According to the method, rapid and non-destructive treatment of the concrete face rockfill dam void area can be realized, and the void area can be used for an extrusion side wall void area, a concrete face rockfill dam construction period face slab void area, a concrete face rockfill dam operation period face slab void area, a dam top wave-proof wall bottom void area and a dam top concrete pavement bottom void area, and the range application is wide.

The invention discloses an active low additional force protection method for pipeline routing effect: (1) calculate the pipeline routing value that will be generated by the pipeline when no protective measures are taken; (2) according to the structural bearing capacity of the area where the pipeline is located, Calculate the maximum pipeline displacement that can be tolerated as the target value of the pipeline control; (3) Based on the target value of the pipeline control, apply variable axial resistance to the end of the pipeline, and calculate the actual displacement of the pipeline under the action of the variable axial resistance. Pipeline value; repeatedly adjust the function of the change of the resistance value with the axial displacement, so that the actual pipe routing value is less than the pipe routing control target value; (4) Design the additional structure at the end of the pipe so that the additional structure slides along the axial direction of the pipe When , the additional structure can generate axial resistance to the pipeline according to the change function of the resistance value with the axial displacement. The invention achieves the purpose of controlling and eliminating the pipe routing effect of deep-sea pipelines by interfering with and inhibiting the fundamental mechanism of the pipe routing.

The invention relates to a construction method for fast-setting polymer grouting to quickly control collapsed hillocks. The scheme includes the following construction steps: excavating at least one side slope horse track on the collapsed hillside slope; drilling a plurality of anchor holes on the collapsed hillside slope ; Insert the ground anchor into each anchor hole and perform polymer grouting to form a polymer anchor; Lay the steel mesh on the surface of the collapsed hillside slope and connect and fix it with the end of each ground anchor, and the steel mesh is connected to the There are several spacers between the surface of the collapsed hillside slope; two-component intumescent polymer grouting material is sprayed on the steel wire mesh to form a high polymer anti-scour layer; drills are drilled on the collapsed hillside slope through the mesh of the steel mesh. Take a plurality of planting holes; fill each planting hole with mixed nutrient soil of grass seeds; set a plurality of inclined drainage holes inwardly and upwardly from the high polymer anti-scour layer, this method has the advantages of short construction period, ecological environment protection and convenient construction And the advantages of high strength and strong erosion resistance.

The invention discloses a novel wharf structure quickly constructed on a soft foundation, and belongs to the field of wharf engineering. The novel wharf structure comprises two rows of long piles and two rows of short pile plates which are symmetrically arranged, the two rows of short pipe plates are respectively arranged inside the two rows of long piles in an opposite direction, a short plate pile is arranged between two adjacent long piles in each row of long piles, and a joint between every adjacent short plate piles is covered by the long pile arranged outside the short plate pipes; geotechnical cloths are paved in the opposite sides of the two rows of short pile plates, an area for filling is formed between the geotechnical cloths at the two sides and internally and vertically provided with grouting pipes in an equal interval way, and rubble complexes are filled in the area. The invention further discloses a construction method of the wharf. By adopting the long piles and short pile plates, the wharf structure is simple, and the stability of the wharf can be improved; furthermore, the structure has the characteristics of being light in weight and smaller in additional load to the foundation; meanwhile, the construction method of the wharf structure is simple to operate and low in cost, and is likely to popularize and apply.

The invention discloses a lightweight subgrade structure, design and construction method above the operating tunnel, including composite lightweight piles, lightweight bodies, U-shaped lightweight grooves and drainage ditches, and the composite lightweight piles are arranged in rows at intervals along the longitudinal direction of the line. In the rock and soil foundation above the state tunnel, the composite lightweight pile includes a piled lightweight body, the light body is set on the top of the composite lightweight pile, the U-shaped light groove is set on the top of the light body, and the top of the U-shaped light groove is filled It is built with soil filling, and the drainage ditch is located at both ends of the lightweight body. Combining the characteristics of low density, high compression resistance and upright appearance of lightweight soil materials, based on the hoop effect of composite reinforced cage and the reinforcement effect of vertical geogrid and annular geogrid, an equal-load replacement method is proposed. Lightweight subgrade structure. It can achieve the purpose of building the subgrade above the operating tunnel, and the additional load of the subgrade is small, which can ensure the normal use function of the tunnel structure and the safe operation of the vehicles in the tunnel. The structure saves construction land, reduces damage to the ecological environment, and has remarkable social, economic, and environmental benefits.

This application relates to the technical field of coal mining, and in particular to a coal-pillar-free self-forming roadway mining method suitable for fully mechanized top coal caving in thick coal seams, which includes the following steps: reinforcing and supporting the roof and two sides of the roadway; Roof slit blasting to form pre-splitting slits; temporary support devices and gangue blocking devices in the roadway are erected along the roadway retention; coal is not released within the preset distance near the end of the working face on the side of the roadway retention; after the roadway is stable, it is removed The temporary support device in the roadway, and the gob area is closed, and the roadway is left to complete. Roof slit blasting is more conducive to the collapse of the rock formation in the goaf, so that the rock formation in the slit can better fill the mining space after the rock formation collapses. The formation of a longer suspended roof improves the surrounding rock stress of the gob-side entry retaining; no coal is discharged within a certain range at the end of the working face on the side of the entry entry, which further ensures the filling effect of the side void area of ​​the entry entry and effectively limits the rotation of the basic top block The sinking greatly reduces the impact on the stability of the lane.

The invention relates to the technical field of civil foundation reinforcement for industrial and civil construction projects. Step 1, investigation and design: investigate the existing buildings, select the type of foundation underpinning piles according to the size of the foundation of the building, the depth of embedding, the distance between the foundation of the building and the deep foundation pit, and the depth of the deep foundation pit. Force calculation to determine the length of the required foundation underpinning piles, the number of foundation underpinning piles, the depth of the foundation underpinning piles exceeding the bottom of the deep foundation pit, and finally complete the design of the ring beam; step 2, building foundation side pressure piles; step 3, building Pile foundation underpinning construction of material foundation. The invention enables the building foundation to meet the requirements of bending resistance, punching resistance and shear resistance through pile foundation underpinning, and converts the natural foundation bearing capacity of the building foundation into pile foundation bearing, greatly reducing the additional load of the building foundation on the deep foundation pit. load, solve the settlement and horizontal displacement of the foundation of the building near the deep foundation pit, and ensure the safety of the factory building.

The invention belongs to the technical field of engineering structure vibration reduction, and particularly relates to a multidirectional tuning energy absorption and vibration reduction device. The inerter type multidirectional tuning energy absorption and vibration reduction device comprises an inerter device and a mass tuning device which are installed in a main body frame. The mass tuning device is connected with the inerter device; and the inerter device and the mass tuning device are connected with the main body frame through elastic elements. The inerter effect is achieved by changing the structural form of the mass block, the mass tuning mode of the damping device is improved, and the energy absorption and energy consumption efficiency of the damping device is improved.

The invention relates to a top film water-retaining method for underwater canal lining overhaul. The top film water-retaining method comprises the following construction process steps: additionally installing a sealing layer on an edge needing to be sealed and a downstream face of a flexible waterproof film respectively, and additionally installing a counter weight on an upstream face; sinking downwards the downstream face of the flexible waterproof film into water, laying the flexible waterproof film on the surface of a canal lining in an area to be overhauled, and exposing the unsealed edge of the flexible waterproof film above the water level of water edge. The waterproof film in the top film water-retaining method disclosed by the invention is low in investment, simple in structure, environment-friendly in material selection, good in water-stopping effect, low in additional load, free from damages to the canal lining, convenient and fast to transport, install and transfer in water, capable of being supported by a floating crane, a movable maintenance cabin and a maintenance gallery, and the like to provide a flexible working space for lining maintenance on the provided working base surface, and also capable of being used as a rush emergency water-retaining curtain for preventing a slide area from expansion.