87results about How to "Reduce reinforcement costs" patented technology

The invention discloses a process for reinforcing adjustable and controllable capping beam of piers, comprising the following steps: (1) engraving shearing force grooves on the surface of the original capping beam concrete according to the design, embedding reinforcing steel bars and chiseling; (2) mixing plant fiber and steel fiber with the newly poured capping beam concrete, wherein the plant fiber is mixed in order to prevent the early shrinkage and crack of the concrete, and the steel fiber is mixed in order to prevent the later-stage stressed crack of the concrete; (3) leaving a certain area for secondary pouring in the middle in advance, wherein the area is 1 / 3 the length of the capping beam; (4) jacking capping beams by using two ends of a jack, and adjusting the reasonable load born by the new capping beam and the old capping beam according to a certain proportion by controlling the force and the jacking height of the jack to adjust the internal force of structures according to the design; (5) transferring the internal force of the basic part of the old structure to the basic part of the newly added structure by jacking; and (6) transferring partial or whole load born by the capping beam of the old biers to the new piers and the combined new and old capping beam structure by controlling the number and the position of prestressed steel strands to adjust the proportion of the whole load born by the combined new and old capping beam structure.

The invention discloses a concrete structure reinforcing method based on near surface mounted prestressed FRP (Fiber Reinforced Polymer), which comprises the steps of: 1, slotting, arranging more than one preformed groove on a concrete structure to be reinforced; 2, installing a tensioning tool of an FRP strip and an FRP strip clamp; 3, tensioning internal FRP strips in the tensioning tool and the FRP strip tool so that the internal FRP strips are tensioned, placing the internal FRP strips in the preformed groove, filling an adhesive, keeping a clamping and anchoring state for a period of time and then curing; and 4, relaxing: when adhesive resin is cured completely to reach the strength, dismantling the FRP strip clamp. The concrete structure has the advantages of low cost, convenience for construction, long service life, good reliability and the like.

The invention belongs to the field of bridge reinforcing, and particularly relates to a novel old-arch-bridge reinforcing structure and a construction method thereof. The novel old-arch-bridge reinforcing structure comprises a bridge body 1, an epoxy mortar filling layer 4 is arranged below the bridge body 1, and a transverse stiffening steel frame is arranged on the epoxy mortar filling layer 4.Arc ribs are connected by using prefabricated box-type splicing steel plates 8, and prestress is applied between the arc ribs by using prestressed reinforcements 9. Then concrete is poured at arch feet, the arch rib and steel plate connecting ends and tensioning anchoring anchorage devices to form an integral structure. Finally, H-shaped steel 7, the box type splicing steel plates 8 and weld joints 5 are subjected to painting and other anti-septic treatment. The transverse stiffening steel frame structure comprises an anchor screw rod 2, an anchor bolt 3, a stiffening rib 6 and the H-shaped steel 7. The structure technology of the novel old-arch-bridge reinforcing structure can reinforce arch bridges, construction is simple and convenient, the cost of reinforcement is low, dead weight enhancement is less, and the reinforcement effect is good; and the novel old-arch-bridge reinforcing structure is a relatively economical and safe method to reinforce the arch bridges based on structuralforce analysis.

The invention provides an anchoring plate, an anchoring system and a construction method. The anchoring plate comprises an anchoring plate main body, wherein a group of continuous anchor slots are formed in the lower surface of the anchoring plate main body, are alternately arranged in parallel, and penetrate through prestressed steel wires; grooves are formed in the end face of one side of the anchoring plate body corresponding to the continuous anchor slots; at least two grooves are symmetrically distributed on two sides of a longitudinal shaft; and bolt holes are formed in the anchoring plate main body alternately along the thickness direction of the anchoring plate main body. According to the anchoring plate, the anchoring system and the construction method, the technical problems of relatively large construction space and construction difficulty for the traditional bridge bottom repairing work can be solved.

The invention discloses a method for electrochemical reinforcement of a down dip weak interlayer of a strip mine slope. The method comprises the steps that anodes and cathodes are alternately arrangedin the weak interlayer at intervals; all the anodes and cathodes are correspondingly and sequentially connected in series through wires and then connected with a direct current power supply, and theouter end parts of the anodes communicate with a solution bin containing an electrolyte solution through a solution delivery pipe; and the electrolyte solution in the solution bin is delivered into ananode metal pipe through the solution delivery pipe, and overflows into the weak interlayer from drilled holes in the surfaces of the anodes, and after the anodes are powered by the direct current power supply, the anodes and the electrolyte solution can react chemically to form metal compounds and hydrated cations. The metal compounds play a role in cementing and solidifying soil of the weak interlayer, the potential difference between the anodes and the cathodes drives the water inside the weak interlayer to move to the cathodes and enter into a cathode metal pipe through the drilled holes,the water flows by gravity to flow out freely from the lower end of the cathode metal pipe and be discharged to the outside of the weak interlayer, and the reinforcement effect of the weak interlayeris good.

The invention discloses a construction method using a collapse region as a subway tunnel foundation. The construction method comprises the following steps that the collapse range is subjected to region division through analytical calculation, and three regions of a stable region, an unstable region and an anchor rod pile reinforcement region are obtained; the stable region is subjected to pile foundation construction; the unstable region is subjected to cable-stayed anchor cable construction; anchor rod piles are anchored in the collapse region, and grouting reinforcement is conducted; and pouring construction is conducted on underground beams, and the three reinforced regions are connected into a whole. The construction method has the beneficial effects that the steps are simple, design is reasonable, and implementation is easy; meanwhile, various factors such as a construction technology, the construction period, feasibility of a reinforcement scheme, the reinforcement effect and thereinforcement cost are considered, the effect of the reinforcement scheme is subjected to effect evaluation through numerical simulation analysis and on-site test methods, both the foundation bearingcapacity and the compressive strength meets design requirements, the collapse region can serve as a foundation of a newly-built subway tunnel structure, and the construction period is also shortenedgreatly while the reinforcement cost is saved.

The present invention discloses an apparatus for reinforcing a column by a prestressed fiber sheet. The apparatus comprises a fixing end anchor and a tensioning end anchor which are anchored to a concrete column, and a convex type hydraulic jack connected with the fixing end anchor and the tensioning end anchor. The apparatus also comprises a dimidiate clamping piece type fixture, a cylinder with a column cap is welded to an upper surface of the clamping piece type fixture, and a sleeve sleeving the cylinder is connected to the convex type hydraulic jack through a jacking rod. One end of the fiber sheet is clamped by the clamping piece type fixture at a tensioning end, and the other end of the fiber sheet is anchored to the fixing end anchor. Prestress can be effectively applied to the externally wrapped fiber sheet for reinforcing the column, the thinner fiber sheet such as fiber cloth and the thicker fiber sheet such as a fiber board can be effectively clamped, higher prestress can be maintained, steel amount is reduced, reinforcing cost is saved, and construction is rapid and convenient, thereby facilitating promotion and application for engineering reinforcement.

The invention relates to a soil body material reinforcing grid in the field of civil engineering. The soil body material reinforcing grid is composed of at least one set of soil nails constructed in an upper body and staggered with each other in a soil body; and provides bearing capacity by the combined action of the grid soil nails and the soil body. The soil body material reinforcing grid gives full play to the mechanical properties of the soil body and the soil nails; overcomes the very low tensile strength shortcoming of the soil body by the high tensile strength of the soil nail grid; has distinct upper body reinforcing effect and low reinforcement cost; and can be used in engineering fields such as slope protection, foundation trench supporting, foundation treatment, etc.

The invention discloses a soft soil foundation curing agent and a construction method for curing a soft soil foundation. The curing agent comprises the following raw materials in percentage by mass: 40.1%-60.0% of carbonated steel slag, 4.2%-5.8% of slag powder and 34.2%-54.1% of cement. When the sum of the mass of the soft soil, the mass of the water and the mass of the soft soil curing agent is 100%, the doping ratio of the soft soil curing agent is 12.0-20.0%. The preparation method comprises the following steps: (1) preparation of soft soil foundation curing agent slurry: weighing carbonated steel slag, slag powder and cement according to a ratio, putting into a sample preparation barrel, fully mixing, adding water according to a water-cement ratio of 0.45-0.55, and stirring to prepare the soft soil foundation curing agent slurry. The carbonated steel slag and the slag powder are used for replacing a cement curing agent, the soft soil curing agent for fixing the soft soil foundation is prepared, the soft soil foundation is cured, and the strength of a cured pile body meets the design requirement. The problem of utilization of metallurgical industry solid waste is solved, and the problem of treatment of soft soil foundations in urban development and construction is also solved.

The invention discloses a drivage peripheral hole homoenergetic blasting method. Peripheral holes (6) are dug on a roadway contour line of a surrounding rock (1) at the end part of a roadway; explosives (4) and cushioning materials (3) are alternatively arranged in each peripheral hole (6) from inside to outside; the explosives (4) in the adjacent peripheral holes (6) are distributed in a shape of a Chinese character pin; detonators (5) are arranged in sections along the explosives (4); nonel tubes (9) of the detonators (5) are led out of the holes along the hole walls of the peripheral holes (6); hole orifices of the peripheral holes (6) are plugged by stemming (2); then detonation is carried out according to a designed detonation network connecting line. According to the method disclosed by the invention, the explosives (4) and the cushioning materials (3) are distributed symmetrically, so that energy is more uniformly distributed, an energy utilization rate of the explosives is improved, a contour of a roadway section is well controlled, the back break phenomenon is avoided, and roadway supporting cost is reduced; meanwhile, the uniformly distributed explosive energy can enable a fragment size for blasting to be uniform, obviously improve a blasting effect and improve shovel-loading efficiency after blasting.

The invention discloses a chain link type automatic synchronous tensioning system and method for prestressed wire ropes. The chain link type automatic synchronous tensioning system comprises an anchor plate, wherein the anchor plate is fixed on a structure to be reinforced through planted bars; a plurality of main threaded rods are arranged in the anchor plate in a parallel and penetrating manner; one end of each of the main threaded rods is connected with a corresponding screw sleeve, and the other end of each of the screw sleeves is connected with a corresponding steel wire rope; after the other end of each of the main threaded rods penetrates through a corresponding opening of the anchor plate, the other end of each of the main threaded rods is fixed by a corresponding anchoring toothed nut; a tensioning bracket is arranged on one side of the anchor plate; after the main threaded rods penetrate in the tensioning bracket, each of the main threaded rods is connected with a corresponding secondary threaded rod through a corresponding connecting sleeve; after the other ends of the secondary threaded rods penetrate out of the tensioning bracket, the other ends of the secondary threaded rods are separately fixed on the tensioning bracket by corresponding tensioning toothed nuts; and the anchoring toothed nuts and the tensioning toothed nuts are separately connected with a driving mechanism. According to the chain link type automatic synchronous tensioning system disclosed by the invention, anchoring a plurality of steel wire ropes can be realized through one anchor plate, so that the reinforcing efficiency and the reinforcing effect of a conventional structure are improved; and synchronous tensioning and synchronous locking are performed on all the steel wire ropes on the anchor plate, so that the situation that the bearing capacity is reduced due to uneven distribution of the prestressing force of the steel wire ropes is avoided, and the automatic synchronous tensioning system is convenient to use, and simple and high-efficiency to mount.

The invention provides a method for assembling a prefabricated part reinforcing column through concrete. The method comprises the steps that a painting layer or a cushion layer on the surface of a component is chiseled away to a concrete base layer for treatment; the surface of the base layer and the surface of a concrete prefabricated part are coated with adhesives; the concrete prefabricated part is fixed; the concrete prefabricated part is clamped with a clamp, and is properly pressurized; impurities in a hole channel are removed, a prestressed steel strand is manually pulled, and the steel strand is tensioned and fixed; pipeline grouting and anchor sealing are conducted; and after the adhesive is cured, the clamp is dismantled. Vertical steel bars of the concrete prefabricated parts are connected through a sleeve grouting technology, and fine aggregate concrete or grouting materials are poured at connecting positions of the prefabricated parts and anchor sealing positions for sealing treatment. According to the method, a fabricated concrete column and brick column reinforcing method is provided, the method is good in corrosion resistance and fire resistance, saves energy and is environmentally friendly, the method can effectively improve the mechanical property of the concrete column, the reinforcing effect is guaranteed, standardized fabricated parts are adopted in the construction process, on-site wet operation is greatly reduced, the labor consumption is reduced, the construction efficiency is improved, the cost is reduced, and the construction period is shortened.