55results about How to "The reinforcement method is simple" patented technology

The invention discloses a process for excavating and constructing soft rock tunnels. Each constructed soft rock tunnel comprises two tunnel portal sections and a tunnel trunk section. Each tunnel trunk section is arranged between the two corresponding tunnel portal sections in a connected manner, surrounding rock level of two tunnel portals of each constructed soft rock tunnel is V level, surrounding rock level of each tunnel trunk section is IV level, and entrances and exits of the constructed soft rock tunnels simultaneously start to be constructed and are constructed in opposite directions. The process includes constructing procedures of firstly, determining methods for excavating the tunnel trunk sections, to be more specific, simulating excavating and constructing procedures by the aid of tunnel excavating and constructing simulation software, and determining the methods for excavating and constructing the tunnel trunk sections according to simulation results; secondly, excavating and constructing the tunnels, to be more specific, dividing each soft rock tunnel to be constructed into a plurality of sections from the rear of the corresponding tunnel portal to the front and starting to excavate and construct the multiple sections. The tunnel trunk sections are excavated in the excavating and constructing procedures by the aid of full-section techniques. The process has the advantages of simple steps, reasonable design, convenience in construction, good service effects, safe constructing procedures and capabilities of easily and conveniently completing the soft rock tunnel excavating and constructing procedures and guaranteeing the construction periods.

The invention discloses a method for reinforcing and treating a liquefied sandy soil foundation. A plurality of drainage pipes are embedded in a to-be-reinforced sandy soil layer of the sandy soil foundation, a plurality of liquid inlet pipes are embedded in the periphery of each drainage pipe, and the upper ends of the liquid inlet pipes are communicated with a reinforcing liquid storage pool through a booster pump; the upper ends of the drainage pipes are connected with a vacuum pump through guide pipes; during reinforcing operation, reinforcing liquid is injected into the reinforcing liquid storage pool, the vacuum pump and the booster pump are started, the pressure difference is produced in the sandy soil foundation, the reinforcing liquid flows into the sandy soil foundation through the liquid inlet pipes, the reinforcing liquid and water in the sandy soil foundation are together drained from the drainage pipes, and operation is repeatedly conducted till reinforcing is completed. The sandy soil foundation is reinforced through the microorganism reinforcing liquid, the reinforcing liquid is high in mobility and can go deep into the sandy soil foundation, the compactness of the sandy soil foundation is improved, and the liquefaction-resistant strength of the foundation is improved; in addition, the reinforcing method is simple, the reinforcing depth is large, and the influences on the surrounding environment and adjacent buildings are small.

The invention discloses a soil body reinforcement device for pipe jacking construction in a sand soil foundation. The reinforcement device comprises a water injection pool, a water injection pump, a primary water injection guide pipe, water injection through pipes, secondary water injection guide pipes, water injection wells, water pumping wells, secondary water pumping and water collecting guide pipes, water pumping and water collecting through pipes, a primary water pumping and water collecting guide pipe, a water pumping pump and a water storage pool, wherein the water injection wells and the water pumping wells are positioned in the sand soil foundation; microorganism consolidation fluid is contained in the water injection pool; a water outlet of the water injection pool is connected with a water inlet of the water injection pump through a pipeline; a water outlet of the water injection pump is connected with a water inlet of each water injection well through a water injection pipeline assembly; a water outlet of each water pumping well is connected with a water inlet of the water pumping pump through a water pumping pipeline assembly; and a water outlet of the water pumping pump is connected with a water inlet of the water storage pool through a pipeline. A reinforcement method has the advantages that the strength stability of the sand soil foundation can be effectively improved; the operation is convenient; the influence on surrounding environment is small; the efficiency is high; and the reinforcement treatment cost of the sand soil foundation can be greatly reduced.

The invention discloses a rigid connection construction of a shear beam for splicing prestressed concrete box girders. The rigid connection construction comprises shear beams (1), small longitudinal beams (2), a new bridge box girder (3), an old bridge box girder (4), wet joints (5), shear bolt pins (6) and anchor bolts (7). The rigid connection construction has the advantages of reasonable structure, definite stress, convenient construction, and small traffic impact; besides, the rigid connection construction is economic and safe, is high in fatigue resistance and durability, also has the effect of structure reinforcement, and can enable the prestressed concrete box girders of a new bridge and an old bridge to form a good whole. The invention further provides a construction technology of the rigid connection construction of a shear beam for splicing prestressed concrete box girders.

The invention discloses a surrounding rock reinforcement method for a junction tunnel section in an upper-soft lower-hard stratum constructed adopting a shield method and a mining method. The method comprises the steps that 1, tunnel face grouting reinforcement is carried out, specifically, grouting reinforcement is carried out on stratum in front of an excavation face of an upper tunnel body by adopting grouting pipes; 2, junction surface grouting reinforcement is carried out, specifically, grouting reinforcement is carried out on the reinforced stratum by adopting sleeve valve pipes; 3, tunnel arch part advanced support is carried out, specifically, advanced support is carried out on an arch part of the junction tunnel section; 4, grouting pipe removal is carried out; and 5, tunnel faceplugging is carried out, specifically, a tunnel face is plugged through concrete backfilling, and a tunnel face plugging structure is obtained. The method is reasonable in design, simple and convenient to construct and good in use effect, and surrounding rock of the junction tunnel section is effectively reinforced by the method of combining the surface grouting reinforcement with the in-tunnel reinforcement so that the mechanical property of the surrounding rock can be effectively improved; and the tunnel face of the junction tunnel section is reliably plugged before and after reinforcement so that tunnel safety construction can be effectively guaranteed, and ground settlement caused by excavation can be effectively reduced.

The invention relates to an external prestressing reinforcing structure and method for a T-shaped concrete beam. The structure comprises multiple vertical transverse partition plates arranged on the lower side of a T-shaped concrete beam flange side by side. Horizontal supporting cushion plates in pairs are arranged at the bottom of a T-shaped concrete beam web, and the supporting cushion plates in each pair are located between two adjacent transverse partition plates; in the transverse partition plates on the two sides of the supporting cushion plates, one end of a high-strength aluminum alloy rib is fixed to one transverse partition plate through an aluminum alloy bolt to form an anchoring end, and the other end of the high-strength aluminum alloy rib is fixed to the other transverse partition plate through a wedge-shaped strand tapered anchorage to form a tensioning end; and the middle portion of the high-strength aluminum alloy rib bypasses the lower sides of the supporting cushion plates and is in a horizontal state. By the adoption of the structure and method, the bearing capacity and durability of the T-shaped concrete beam can be improved while it is guaranteed that the bearing performance of the T-shaped concrete beam is not reduced, and a reinforcing effect is good; and meanwhile prestress can be effectively applied to an aluminum alloy through the formed anchoring end and the formed tensioning end.

The invention belongs to the technical field of concrete structural maintenance and reinforcement and particularly relates to a method for reinforcing underwater concrete structure by ultrahigh-performance concrete. The method is characterized by including steps of to-be-reinforced area surface clearing, to-be-reinforced concrete structure basic cleaning, reinforcement cage placement, form plate mounting, gravel and aggregate pouring, underwater rapid-hardening mortar pouring, ultrahigh-performance concrete pouring and form removal after curing. The method has advantages of simplicity, convenience, remarkable improvement of bearing capacity and durability of the reinforced concrete structure, and the like.

The invention discloses a rammed earth wall reinforcing method which comprises steps as follows: 1, building brick columns for covering two ends of a rammed earth wall at the two ends of the rammed earth wall; 2, when building the brick columns to the 1/5-1/4 height position of the rammed earth wall, punching holes in the two ends of the rammed earth wall, then inserting anchor rods with cement mortar spread on surfaces, and continuously building the brick columns; 3, when building the brick columns to the 1/3 height position of the rammed earth wall, digging grooves in two sides of the rammed earth wall and setting reinforcement mortar belts; 4, when building the brick columns to the 2/5-1/2 height position of the rammed earth wall, repeating the procedure of Step 2; 5, when building the brick columns to the 2/3 height position of the rammed earth wall, repeating the procedure of Step 3; 6, when building the brick columns to the 3/4-4/5 height position of the rammed earth wall, repeating the procedure of Step 2; 7, when building the brick columns to be flush with the rammed earth wall, finishing reinforcement of the rammed earth wall. The reinforcing method is simple, the construction cost is low, and the seismic performance of the rammed earth wall is improved significantly.

The invention relates to a karst cave foundation reinforcement method, which relates to the technical field of building construction. For the existing grouting method, the existing road on the ground needs to be demolished, and the grouting range is relatively large, which not only increases the difficulty of construction, but also increases the problem of construction cost. The steps are as follows: After the foundation pit excavation, support, and precipitation are completed, geophysical prospecting methods are used on site to infer the distribution characteristics of karst caves in conjunction with geological surveys, and the boundary lines of proven karst caves and unproved karst caves are determined according to geophysical prospecting data; Drill a number of double-liquid grouting holes on the outer edge of the boundary line of the karst cave, make the central line of the double-liquid grouting holes enclose the area to be reinforced in the karst cave, drill single-liquid grouting holes in the area to be reinforced in the karst cave, install the grouting pipe, and The grouting pipe is used for pressure grouting. First, double-liquid grout made of cement, water and water glass is injected into the double-liquid grouting hole to form a grout-stop wall in the area to be reinforced in the cave, and then, in the single-liquid grouting hole Inject single-liquid grout for reinforcement, and end grouting when the grouting pressure in the single-liquid grouting hole reaches the design value.

The invention relates to an anti-overturning device for a single-pier bridge. The anti-overturning device is installed between a bridge girder and a pier stand column and comprises viscous dampers, ahinge support and chemical anchor bolts. The hinged support is anchored on the bridge girder and the bridge pier stand column, viscous dampers are installed at the two sides of the bridge girder and the two sides of the bridge pier stand column, and the bridge girder is connected with the pier stand column through the viscous dampers. By additionally arranging the viscous dampers between the bridge girder and the pier stand column, the bridge girder can be effectively prevented from overturning, and the overturning resistance of the single-pier bridge is improved. The anti-overturning device is simple in structure, is convenient to construct, and has the good economical efficiency.

The invention belongs to the field of building structural construction, in particular to a temporary reinforcing method of circular pipe components. The temporary reinforcing method has the following specific construction steps that (1) according to the specifications of reinforced circular pipes, appropriate steel angles and steel angle fasteners matched with the steel angles are selected; (2) according to the lengths of the reinforced circular pipes, the lengths of the steel angles and the number of the steel angle fasteners are determined; (3) before the circular pipe components are stressed, two steel angles are symmetrically arranged on the two sides of each reinforced circular pipe and fixed through the corresponding steel angle fasteners; and (4) after structural construction unloading, the steel angle fasteners are loosened, steel angle reinforcing devices are dismantled, and reinforcing of the circular pipe components is completed. The temporary reinforcing method facilitates construction, and construction does not need machines such as a crane and can be achieved through manual work.

The invention provides a composite reinforcing agent and a preparation method thereof, and a reinforcing method of aged paper. The composite reinforcing agent is prepared from raw materials comprising the following components in parts by weight: 0.5 to 2.5 parts of cationic starch, 0.5 to 2.5 parts of cationic guar gum, 50 to 2000 parts of a solvent, and 8 to 12 parts of a cosolvent. Compared with the prior art, the composite reinforcing agent provided by the invention has the advantages that during reinforcement protection on paper, not only the handwriting of the paper is hardly influenced, but also the mechanical property and the ageing resistance thereof can be improved. An experiment result shows that on the basis of little influence on the color and pH value of the paper treated by using the composite reinforcing agent provided by the invention, the mechanical property thereof is increased by about 45 percent; moreover, after ageing is accelerated in a wet-hot environment, the reinforcement effect can be maintained to be 99.5 percent or more, and the ageing resistance is better.

The invention discloses a construction method for a folding type structural slab post-cast strip joint formwork. The construction method includes the following steps that firstly, a structural slab forming formwork is erected, and specifically, the forming formwork for a constructed structural slab is erected; secondly, a bottom layer reinforcing mesh is bound; thirdly, a post-cast strip joint formwork is arranged, specifically, the post-cast strip joint formwork comprises a plurality of assembled formwork bodies, each assembled formwork body comprises a left lateral formwork body and a right lateral formwork body symmetrical with the left lateral formwork body, and each lateral formwork body comprises a foldable formwork body and a formwork connecting structure mounted on the foldable formwork body; fourthly, a surface layer reinforcing mesh is bound; fifthly, the post-cast strip joint formwork is erected; sixthly, concrete is poured, and specifically, the constructed structural slab is subjected to concrete pouring through the forming formwork and the post-cast strip joint formwork; and seventhly, the post-cast strip joint formwork is removed. The steps of the construction method are simple, the design is reasonable, construction is easy and convenient, the using effect is good, the construction process for the structural slab with a reserved post-cast strip can be completed easily, conveniently and rapidly with high quality, and the construction quality is easy to guarantee.

The invention discloses a reinforcing structure and a reinforcing method of a spatial structure bending compression bar. The reinforcing structure of the spatial structure bending compression bar comprises a restraining component which is arranged on the peripheral side of the bending compression bar and has a rectangular cross section. The restraining component is formed by two unequal-angle steel pieces shorter than the bending compression bar in a butt joint splicing mode. Each unequal-angle steel piece comprise a long-limb plate and a short-limb plate which are perpendicularly arranged inan L shape. The two long-limb plates are oppositely arranged, the two short-limb plates are oppositely arranged, each long-limb plate corresponds to the corresponding short-limb plate and is fixedly welded, and the inner sides of the long-limb plates and the inner sides of the short-limb plates are in butt joint with the outer wall surface of the bending compression bar. By means of the reinforcing structure and the reinforcing method, the problems that the sizes of constraint parts are numerous and matching is difficult due to existence of initial bending of the compression bar are solved.

The invention discloses a friction energy dissipation sleeve reinforcing device and a use method thereof. The device comprises a first pipe piece and a second pipe piece. The first pipe piece comprises a first stiffening plate in the pipe length direction; the second pipe piece comprises second stiffening plates which are uniformly distributed in the length direction of the pipe and are fixedly connected; a friction piecet is arranged between the first stiffening plate and the second stiffening plates, and a first round hole, a second round hole and a first slotted hole are fixed. The method comprises the following steps that the first pipe piece and the second pipe piece with the length less than that of a pressing rod are selected; the first pipe piece and the second pipe piece are oppositely arranged, the first stiffening plate and the second stiffening plates are opposite, the first round hole and the first slotted hole are opposite, and the friction piece is clamped between the first stiffening plate and the second stiffening plates; fixing is performed through bolts; one end of the pressing rod is connected with the end of the first pipe piece through a first weld joint, andthe other end is connected with the end of the second piece piece through a second weld joint. Restraint is provided for buckling of the pressing rod, a friction type damper is formed and thus the bearing capacity of the pressing rod and the energy dissipation capacity of the structure can be improved.