115results about How to "Give full play to carrying capacity" patented technology

The invention discloses a standardized node connector of a steel structure, comprising a steel column and a connection board. The connection board is fixedly connected on the side surface of the steel column; the free end of the connection board is a bolt connector; both ends of the steel column are fixedly connected with a flange on which a connection hole is arranged; the steel column is provided with a vertical through seam matched with the connection board; the connection board penetrates through the vertical through seam; and the connection board is fixedly welded with the penetrated part of the steel column. The invention has standard structure and convenient use as well as strong carrying capacity, can be applied in industrialized production and is very beneficial to promotion and application.

The invention discloses a measuring apparatus and a method for the flexibility line shape of a bridge structure. The measuring apparatus is not fixedly arranged on a bridge, the equipment is simple, the realization is easy, the cost performance is high, the operation is convenient, the flexibility line shape of the bridge can be rapidly, objectively, and intelligently sensed and reproduced, the flexibility of the bridge is measured, the overall flexibility change of the bridge can be reflected via the change of line shapes in different times, bridge management workers can be informed of the current flexibility line shape of the bridge in time, especially the flexibility change state, the health and safety condition of the bridge can be analyzed, the bearing ability of the bridge can be fully developed, load limit and the falling of the bridge are reduced, and the practical engineering value is very high.

The invention provides an argillaceous soft rock roadway partition multi-granularity grouting reinforcement method. A corresponding geological state is evaluated according to geological information data of a specific roadway, drilling points of shallow grouting holes and deep grouting holes are designed in the roadway according to the evaluated geological state, along with tunneling of the roadway, the periphery of the roadway is anchored, and a concrete and silica sol spray layer is arranged; the shallow grouting holes are constructed in the sides and a top plate and a bottom plate of the roadway, hole sealing grouting is carried out, the deep grouting holes are constructed in the pre-designed drilling points of the deep grouting holes, hole sealing grouting is carried out, and therefore grout is effectively sealed and reinforced in a deep virgin rock region. Shallow broken region surrounding rock is reinforced, water molecules, air molecules and crack water are prevented from entering a channel of a jet-grouted solid, the anti-deformation capacity and durability are improved, and the problems that after an argillaceous soft rock roadway encounters water, prominent non-linear large deformation, remarkable rheology and disturbance are generated are solved.

Disclosed is a post-grouting capped rigid pile and drainage unit combined foundation treatment technology. The post-grouting capped rigid pile and drainage unit combined foundation treatment technology comprises paving horizontal drainage units on the surface of a soft foundation and constructing vertical drainage units inside the foundation, wherein the horizontal drainage units and the horizontal drainage units are communicated to form drainage channels; constructing rigid piles inside the soft foundation, arranging grouting bags and reinforced concrete pile caps at the tops of the piles to form a controllable support system. When being filled with water and stabilized, the grouting bags can be extruded under the action of upper load to drain water and retract, the load born by the rigid pile can be relatively low, and after water drainage and solidification under the action of the upper load, the bearing capacity of foundation soil can be improved; when the grouting bags are filled with grout and solidified, the rigid piles, the grout and the pile caps form rigid support to bear more upper load and accordingly to reduce the loading pressure of the foundation soil. The post-grouting capped rigid pile and drainage unit combined foundation treatment technology can give full play to the bearing capacity of the foundation soil and reduce the consumption of the rigid pile to reduce the economic input, and meanwhile, can effectively control afterward settlement of a project to reduce upper structural deformation and damage due to overlarge settlement.

The invention discloses a ground fracture crushed zone passing construction method for shallow-buried tunnel excavation. A constructed shallow-buried excavation tunnel comprises a left line tunnel and a right line tunnel which are communicated through a transverse channel. During construction of the constructed shallow-buried excavation tunnel, the method comprises the steps that 1, transverse channel construction is performed; 2, tunnel construction is performed, wherein the two tunnel sections of the left line tunnel and the right line tunnel are constructed through the transverse channel, the construction is performed in the mode of multiple tunnel sections in the longitudinal extending direction of the tunnel from back to from during construction of any one tunnel section, and the construction of any one tunnel section includes the processes of ground fracture judgement, tunnel excavation and synchronous preliminary bracing construction, concrete protection layer construction, post-cast strip retention judgement, secondary tunnel lining construction and post-cast strip construction. The method includes simple steps and is reasonable in design, convenient to construct, good in construction effect, capable of simply and conveniently completing the shallow-buried tunnel excavation construction process of a ground fracture crushed zone and safe and reliable in construction process.

A method for reinforcing a double-curved arch bridge with a corrugated arch plate comprises pouring a main arch ring arch rib reinforcement layer on the outside of the main arch ring supply rib, pouring a main arch plate reinforcement layer on that main arch ring arch plate, the main arch plate reinforcement layer and an arch plate groove area forming a cavity. Compared with the reinforcement method of directly filling the groove area on the arch plate in the prior art, the invention increases the bending moment of inertia of the section, at the same time, the material consumption is small, which is favorable for the stress of the structure before the newly poured concrete reaches the strength standard value. The invention does not change the characteristics of the double-curved arch bridge, and retains the historical style and features of the bridge. The invention also replaces the original filler with the lightweight filler, lightens the dead weight of the structure, reduces the stress level under the action of the original structure under the dead load, makes the load shared by the reinforcement layer larger, and gives full play to the bearing capacity of the reinforcement layer.

The invention relates to a foundation ditch composite concrete nail supporting structure and method. The method comprises the steps that concrete nails or anchoring rods are arranged, and a surface layer reinforcing mesh is laid; concrete is injected till the concrete covers the surface layer reinforcing mesh; a lower nail bearing structure is installed; micro-prestress is exerted on the concrete nails, and the concrete nails are locked through nuts; concrete is sprayed to form a block concrete surface layer, and a concrete nail supporting layer is formed; a lower anchor bearing structure is installed; low prestress is exerted on the anchoring rods, and the anchoring rods are locked through anchoring tackles; concrete is injected to form a block concrete surface layer, and an anchoring rod supporting layer is formed; the concrete nail supporting or the anchoring rod supporting is repeated till the supporting reaches the bottom of a foundation ditch, the concrete nail supporting layers and the anchoring rod supporting layers are formed, and the supporting structure is formed. The defects that prestress cannot be exerted on the concrete nails and the nail heads are prone to generating piercing damage to the surface layers are overcome through the lower nail bearing structure of the nail heads of the concrete nails; the problems of steel channel buckling damage and the anchoring head punching failure are solved through the lower anchor bearing structure of the anchoring heads; the defects that work of the concrete nails and work of the anchoring rods are inconsistent in the traditional joint supporting of the concrete nails and the anchoring rods is solved by exerting the micro-prestress on the concrete nails and exerting the low prestress on the anchoring rods.

The invention discloses a tunnel arch frame with elastic grouting bags and a mounting method thereof. The grouting bags are arranged on the face, making contact with surrounding rock, of the arch frame and made of flexible elastic materials; the grouting bags are bonded to the reverse side of the arch frame through glue; and after the arch frame is mounted, slurry is injected into the grouting bags, the grouting bags are expanded, gaps between the arch frame and the irregular surrounding rock are full of the grouting bags, and after the slurry is solidified, the arch frame and the surroundingrock are tightly attached. Compared with the prior art, the advantages of high bearing capacity, even stress, low cost, high construction speed, easy operation, safety and the like of the arch frame can be given into full play, and the tunnel arch frame can be widely suitable for various drill-blasting method tunnel construction.

The invention belongs to the technical field of foundation structures of marine engineering, and discloses a combined marine six-pontoon floating box foundation structure and a construction method thereof. The combined marine six-pontoon floating box foundation structure comprises six pontoons, wherein the six pontoons are arranged in the way that the six pontoons are connected in sequence in thehorizontal plane according to the center points of the six pontoons to define a regular hexagon. A floating box is connected between the every two adjacent pontoons. Each floating box penetrates through the axes of the corresponding pontoons at the two ends of each floating box along the center line of the length direction. The pontoons and the upper parts of the floating boxes are connected witha transition section tower frame. The transition section tower frame is used for being connected with upper wind power equipment. The construction method of the combined marine six-pontoon floating box foundation structure comprises the steps of structure prefabricating, initial adjustment preparation, water consignment, foundation water entry, negative pressure penetration, grouting ballasting, supper structure mounting and recycling and utilizing. The combined marine six-pontoon floating box foundation structure has the characteristics of having a gravity foundation and a suction-barrel-typefoundation, the bearing capacity is improved while the transporting and mounting method is simple and convenient, recycling and reusing can be achieved, and the construction cost is greatly reduced.

The invention discloses a method for freezing a high-gradient heterogeneous freezing wall. The mixed freezing mode of "salt water + liquid nitrogen" is adopted, and a freezing pipe is arranged at the place where the soil around the shaft needs to be frozen, and a brine freezing pipe is arranged inside the freezing wall. , and a liquid nitrogen freezing tube is arranged on the periphery. The liquid nitrogen freezing tubes are arranged in one row, and the brine freezing tubes are arranged in at least one row, and each row is arranged in a circular shape. When there are two or more rows of brine freezing pipes, the diameter of the ring in the innermost row should ensure that the temperature of the well side during excavation is not higher than the ideal value that is conducive to the stability of the well side; the brine temperature setting of the brine freezing pipes should ensure that It can form a temperature field that gradually decreases from the inside to the outside. The temperature field formed by the freezing tube layout method of the present invention has obvious high gradient non-uniformity. Compared with conventional brine freezing, under the same load conditions, the thickness of the frozen wall formed by this pipe layout is small but has a higher bearing capacity, which will reduce the amount of frost heaving and thawing, and reduce the amount of engineering work for freezing holes , The freezing period is shortened.

The invention discloses a head car body structure of a high-floor tramcar. The head car body structure comprises a base frame, side walls, a roof, a driver cab, an end wall, and an upper/lower hinge seat. The base frame, the side walls, the roof and the end wall are connected by welding, the driver cab is connected to the base frame and the roof by bolts, and the upper/lower hinge seat is rivetedto the end wall and the base frame respectively. The car body structure is mainly made by welding of hollow-section extrusion aluminum-type materials. In the manner, the car body structure has a goodlightweight effect and a good noise isolation performance while meeting the requirements of strength; and at the same time, window columns adopt an arc design, so that the area of a window frame is increased, and passengers can enjoy more wild field of vision to meet the needs of tour and sightseeing. In addition, the upper and lower hinge seats are riveted and cooperate with each other to effectively improve the connection strength with the car body. Even if the car body is larger than 12 meters, the car body structure can ensure sufficient connection strength.

The invention belongs to the technical field of foundation structures of oceanographic engineering, and discloses an offshore six buoy and six buoyancy tank combined type foundation structure and a construction method thereof. The foundation structure comprises six buoys arranged in a mode that the center points of the buoys are connected in sequence to define a regular hexagon shape on a horizontal plane, a buoyancy tank is connected between every two adjacent buoys, and the center line in the length direction of each buoyancy tank penetrates through the axes of the buoys on the two ends of the buoyancy tank; and a transition section tower is connected to the upper portions of the buoys and the upper portions of the buoyancy tanks, and the transition section tower is used for being connected with upper wind power equipment; and the construction method comprises the steps of structure prefabrication, primary adjustment preparation, overwater towage, water entrance of a foundation, negative pressure penetration, grouting and ballasting, upper structure installation and recycling. The foundation structure has the characteristics of a gravity type foundation and a suction barrel typefoundation, the bearing capacity is improved, and meanwhile, the transportation and installation modes are simple and convenient, the foundation structure can be recycled, and the construction cost isgreatly reduced.

The invention discloses a concrete preassembled road high in rupture strength. The concrete preassembled road comprises four concrete precast slabs; the two sides of each concrete precast slab are provided with holes used for placing steel strands; adjacent concrete precast slabs are connected via the steel strands; the diameter of the steel strand is 15.50mm; the four sides of each concrete precast slab are provided with the holes used for placing the steel strands, and adjacent concrete precast slabs are connected via the steel strands; one road surface unit is formed from the four concrete precast slabs via the steel strands and steel connecting plates arranged on the outsides of the concrete precast slabs; connecting key structures are arranged between adjacent concrete precast slabs; each connecting key structure comprises a shearing-resistant convex key and a shearing-resistant concave key matching with each other. The concrete preassembled road is convenient for transportation, and rapid and convenient for installation; road slabs can be divided into a plurality of kinds and types according to the ratio of the short edges to the long edges; and the plurality of positioning shearing-resistant connecting keys are arranged on the joint interfaces of the precast slabs so as to ensure that rupture or breakage of the road slabs is not caused under repeated action of overload vehicles.

The invention discloses a sandwich heat preservation composite shear wall prefabricated part and a manufacturing method thereof. The prefabricated part comprises an inner concrete wallboard, an outerconcrete wallboard, a heat preservation layer, a cavity and a connecting piece system; the connecting piece system penetrates through the cavity and the heat preservation layer and extends into the inner concrete wallboard and the outer concrete wallboard; and the connecting piece system comprises at least four independent truss connecting pieces and a plurality of rod-shaped connecting pieces with the lengths distributed in a wall thickness direction. The manufacturing method comprises the following steps of: binding the reinforcing mesh of the outer concrete wallboard, and mounting the connecting piece system on the reinforcing mesh; pouring outer wallboard concrete, laying a heat insulation board, and mounting a reinforcing mesh in the cavity; binding and mounting the reinforcing mesh of the inner concrete wallboard, pouring concrete, keeping the inner concrete wallboard still, and integrally overturning other components by 180 degrees; and moving the overturned components towards the inner concrete wallboard, pressing the end portions of all the connecting pieces into the inner concrete wallboard and making the end portions of all the connecting pieces fully contact with the inner concrete wallboard. All components in the connecting piece system are stressed definitely, and the non-combined stress mode of a sandwich heat preservation composite shear wall is achieved.

The invention discloses an impacting-resistant and abrasion-resistant concrete prefabricated road. The impacting-resistant and abrasion-resistant concrete prefabricated road comprises four prefabricated boards. Holes where steel strands are contained are formed in the two sides of the prefabricated boards respectively. The adjacent prefabricated boards are connected through the steel strands. The diameter of the steel strands is 14.50 mm. Or holes where the steel strands are contained are formed in the four sides of the prefabricated boards, and the adjacent prefabricated boards are connected through the steel strands. The four prefabricated boards form a road surface unit through the corresponding steel strands and steel connecting board bands on the outer sides of the prefabricated boards. Connecting key structures are further installed between the adjacent prefabricated boards. Each connecting key structure comprises a shearing-resisting convex key and a shearing-resisting concave key which are matched. The prefabricated boards are made of cement, coal ash, sand, water, nylon fibers, barium nitrate, calcium lignosulphonate, silicon carbide powder, sepiolite powder, alumina silicate fibers and gypsum.

The invention discloses an underwater pouring root type foundation with a retaining wall and a construction method thereof. The underwater pouring root type foundation with the retaining wall is characterized in that a retaining wall layer formed by pouring underwater quick set materials is arranged between a cast-in-place reinforcing concrete tubular column and the pore-forming inner wall, the side wall of the concrete tubular column is provided with root keys in the radial direction of the tubular column, the bottom of the concrete tubular column is provided with a concrete back cover, and a top cover is arranged on the top of the concrete tubular column in a pouring mode so that the underwater pouring root type foundation with the retaining wall can be formed. The underwater pouring root type foundation can be effectively applied to civil engineering, bridge buildings and water conservancy project structures, and the construction efficiency is improved.

The invention discloses a precast concrete post grouting pile which comprises a post grouting pile body, a reinforcement cage framework, flanges, a post grouting tank, a post grouting pipe, a grouting hole and a pile bottom filler, wherein the reinforcement cage framework comprises longitudinal ribs and surrounding ribs; one end or two ends of the framework are welded with the flanges; at least one post grouting pipe runs through the center or the side edge position of the framework or the center and the side edge position of the framework; one end of the post grouting pipe is provided with the grouting hole; the grouting hole is positioned in the post grouting tank; and the post grouting tank is arranged on the post grouting pile body. In the constructing process, the post grouting pile is sunken and immediately, cement paste or powder paste with a specific surface area of 2,500 to 6,500kg/cm<2> is injected into the post grouting pile body by the grouting pipe, so that sufficient adhesion of the grouted paste and a soil layer around the pile is ensured. The precast concrete post grouting pile can realize improvement on rock and soil common resistance of soil and the pile so as to further play bearing capacity of the pile; and meanwhile, the number of the used piles can be reduced and engineering cost is reduced.

The invention discloses a novel rapid-assembly type anti-shearing concrete pavement. The anti-shearing concrete pavement comprises a plurality of prefabricated plates, wherein holes for accepting steel strands are formed in two sides of each prefabricated plate; every two corresponding adjacent prefabricated plates are connected through steel strands; holes for accepting steel strands are formed in four sides of each prefabricated plate; every two corresponding adjacent prefabricated plates are connected through steel strands. The anti-shearing concrete pavement disclosed by the invention is prefabricated in a factory, and after being transported to a construction site, the prefabricated pavement is positioned and mounted; wet operation is not needed on the construction site, so that the pavement is convenient and rapid to mount, and the environmental influence on the pavement is small; standardized production of the prefabricated concrete pavement plates of fixed sizes are performed in factories and high production efficiency and quality are realized, and a great amount of manpower resources are saved; the prefabricated pavement plates are classified into multiple varieties and types according to bearing capacity and length, so that designers can conveniently select an appropriate prefabricated pavement plate type according to different use requirements; therefore, the road design is simple and convenient.