20results about How to "Guaranteed mechanical performance" patented technology

The utility model relates to the field of pile foundations, in particular to an uplift precast pile structure which comprises a precast hollow pile and an anchoring device, the anchoring device is connected with the precast hollow pile, a plurality of unbonded prestressed steel strands are arranged in the precast hollow pile, and the anchoring device comprises a pile bottom anchoring part and a pile top anchoring part. The anti-pulling precast pile solves the problem that an anti-pulling precast pile in the prior art cannot be used as a long pile or an ultra-long pile, improves the anti-pulling bearing capacity of a single pile, improves the stress performance of the anti-pulling pile, and enables the anti-pulling pile to have better integrity and anti-pulling ductility.

The invention relates to a steel structure connecting joint which comprises a longitudinal beam body, a cross beam body, a cross beam fixing piece, a longitudinal beam fixing piece, a supporting arm and a bearing piece. Wherein the cross beam fixing piece is fixed with the end part of the cross beam body, and is connected to the longitudinal beam body in an embracing manner; the longitudinal beam fixing piece is located below the cross beam fixing piece and fixedly connected to the longitudinal beam body. The supporting arms incline outwards from bottom to top, the lower ends of the supporting arms are fixed to the longitudinal beam fixing pieces, and the upper ends of the supporting arms are fixed to the bearing pieces. The transverse beam and the longitudinal beam are preliminarily fixed by arranging the transverse beam fixing piece for directly connecting the longitudinal beam and the transverse beam, meanwhile, the longitudinal beam fixing piece is connected to the longitudinal beam, the longitudinal beam fixing piece and the preliminarily fixed transverse beam are supported through cooperation of the supporting arm and the bearing piece, and a high-stability connecting structure of the transverse beam and the longitudinal beam is formed; the welding area of the steel structure connecting joint formed by the longitudinal beams and the transverse beams is reduced, and the stress performance of all parts of the connecting position is guaranteed.

The utility model provides a highly wear-resistant mirror roller, which relates to the technical field of mirror rollers and comprises a mirror roller. Rotating shafts are mounted at the two opposite ends of the mirror surface roller, and the two opposite ends of the mirror surface roller are sleeved with impellers; movable sleeves are sleeved outside the rotating shaft, and the two movable sleeves are respectively positioned at two ends of the mirror roller; and the impeller is in contact with the movable sleeve. In order to solve the problems that a traditional mirror surface roller is long in whole and large in transportation difficulty, the rotating shafts are connected to the two ends of the mirror surface roller in a clamping mode, connection between the rotating shafts and the mirror surface roller is more convenient, the rotating shafts can be replaced conveniently, and the transportation difficulty is reduced; and the inserting blocks are influenced by the thrust of the springs and are inserted into the L-shaped clamping grooves, the effect of locking the rotating shaft is achieved through the movable sleeves, and the firmness and the stress effect of connection between the mirror roller and the rotating shaft are guaranteed.

The present invention provides a slow-bonding shear nail, including a sleeve and a stud weld nail, the sleeve includes a cylinder and an upper cover, the cylinder and the upper cover enclose a receiving cavity, the receiving cavity is filled with a slow-bonding adhesive, the stud weld nail includes a welding portion welded to a steel structure and a covering portion extending into the cylinder and covered by the slow-bonding adhesive, the covering portion blocks the cylinder. The present invention also provides a steel-concrete composite beam, including a steel structure, a concrete slab, a plurality of prestressed steel strands and the aforementioned plurality of slow-bonding shear nails, each of the prestressed steel strands is tensioned in the concrete slab, the steel structure supports the concrete slab, each of the slow-bonding shear nails is welded to the steel structure and cast in the concrete slab. The present invention also provides a construction method for a steel-concrete composite beam, the steps are as follows: S1, erecting a steel structure; S2, welding stud weld nails on the steel structure, and installing a slow-bonding shear nail sleeve; S3, casting a concrete slab on the steel structure; S4, tensioning the prestress in the negative bending moment zone; S5, waiting for the slow-bonding adhesive to solidify.

The present invention provides a transport vehicle body with a lifting platform, comprising: a vehicle body having a base frame and a bottom plate laid on the base frame; a lifting platform that can be lifted and lowered in the vehicle body; a plurality of lifting drive devices that are used to drive the lifting platform to rise and fall; and a plurality of support structures that are supported between the base frame and the lifting platform. By providing a plurality of support structures that are supported between the base frame and the lifting platform, the support for the lifting platform is increased, which is beneficial to improving the stability of the lifting platform after it is raised and ensuring the reliability of use; and by installing the support structure on the base frame, the force performance is guaranteed and a stable supporting force can be provided. And the lower mounting seat is arranged on the base frame, and a port is opened on the bottom plate; so that when the lifting platform is in a grounded state, the lifting platform can land on the bottom plate, which is beneficial to increase the effective volume in the vehicle body.

A cable truss, including upper chord cable, lower chord cable, cable clamp, cable clamp support arm, cable end connecting block; the two ends of the cable clamp support arm are respectively provided with a cable clamp, the cable clamp is a cylindrical structure as a whole, which is composed of upper spiral body, middle spiral body and lower spiral body, the joint of the upper spiral body and the middle spiral body is provided with an upper chord cable through hole, and the joint of the middle spiral body and the lower spiral body is provided with a lower chord cable through hole; a plurality of telescopic locking pin shafts are arranged in the upper spiral body and the lower spiral body in the vertical direction, the middle spiral body is provided with locking pin shaft insertion holes corresponding to the locking pin shafts, and the locking pin shafts are inserted and matched with the locking pin shaft insertion holes. The application solves the design problem of the cable net node, reduces the adverse effect of the unbalanced force between the cable nets on the overall structure, increases the force rationality of the node and the safety of the whole cable net, reduces the processing and manufacturing cost and the construction difficulty, and can be applied to the "sky round place" structure of the "Dream of Red Mansions" drama fantasy garden engineering.

The invention provides a method for reinforcing a holed raft by a steel plate, which comprises the following steps that: an original raft without a hole is equivalent to a reinforced concrete elastic foundation beam, and the rigidity of the original raft is provided by a raft in a to-be-holed area range according to the equivalent concrete beam rigidity; a steel plate framework is added in the preset range of the holing position of the holed raft plate to form a new raft plate, the rigidity of the new raft plate is equivalent to that of a steel-reinforced concrete beam, and the rigidity of the new raft plate is provided by concrete under the holed raft plate and the steel plate framework; and the original raft and the new raft are replaced according to the equivalent linear stiffness, and parameters of the steel plate framework are obtained through calculation. The design parameters of the steel plate framework are obtained through the equivalent line rigidity replacement mode of the original raft and the new raft, and then the corresponding steel plate framework is arranged. The equivalent stiffness conversion method can reasonably calculate the thickness of the required steel plate, and the reinforcing effect is ensured. And under the conditions that the construction process is simplified and the construction difficulty and cost are reduced, the overall stress reliability of the raft is effectively guaranteed.

The invention discloses a rigid pile composite foundation construction method which comprises the following steps: (1) a prefabricated pipe pile with an expanded head at one end is manufactured in a prefabrication factory by adopting a centrifugal method, and the expanded head part takes an outer sleeve steel pipe as an outer mold during centrifugal construction, (2) the prefabricated pipe pile with the expanded head is transported to a construction site, (3) the prefabricated pipe pile is hoisted and positioned; (4) welding a closed steel plate at the top of the prefabricated pipe pile to form a closed section; and (5) constructing a cushion layer at the top of the pile to form a rigid pile composite foundation. According to the method, construction is easy and convenient, the construction period is shortened, core filling concrete does not need to be poured, the use amount of pile cap materials is reduced, the structural economy is improved, by enlarging the section of the pile top and forming the steel pipe concrete structure, the hitting resistance of the pile top part is improved, the breakage rate of the pile head during hammering construction is reduced, and the pile forming quality is guaranteed.

A reinforced restrained rectangular steel tube concrete column and construction method, which consists of an L-shaped steel plate, a restraining rod, a locking rod, an inner support rod and concrete. The restraining rod, the locking rod and the inner support rod are all steel components. Two L-shaped steel plates are spliced ​​to form a rectangular steel tube. The restraining rod is welded on the two inner sides of the L-shaped steel plate. The heights of the restraining rods on the two L-shaped steel plates are different, and the restraining rods do not collide with each other. When the two L-shaped steel plates are spliced ​​into a rectangular steel tube, a circular channel is formed between two groups of restraining rods with the same horizontal position. The locking rod is located in the circular channel formed by the restraining rod, and the inner support rod is located in the channel of the locking rod. The rectangular steel tube formed by the L-shaped steel plate is filled with concrete. During construction, the inner support rod is inserted into the channel of the locking rod through a traction rod, and the inner support rod opens the locking rod to apply pre-tension to the restraining rod. The invention has the advantages of good force performance, high bearing capacity and convenient construction, and has good economic benefits.

This application provides an assembly device and a method for determining the parameters of the assembly device. The device includes: an assembly bracket and a corbel support; the corbel support includes: an embedded part and a pressure-bearing part; the embedded part includes: a base plate, a front end plate, a rear end plate, and two side plates; the front end plate and the rear end plate are arranged opposite each other and are both vertically fixedly connected to the base plate; the two side plates are arranged opposite each other and their bottoms are fixedly connected to the base plate; the pressure-bearing part includes: a pressure-bearing plate and multiple shear plates; the multiple shear plates are arranged parallel and spaced apart and perpendicularly pass through the front end plate and the rear end plate; the pressure-bearing plate is fixedly covering the top of the multiple shear plates; the assembly bracket is arranged in an inverted triangular shape on the pressure-bearing plate. Through the vertical fixed connection of the shear plates, pressure-bearing plate, and rear end plate, not only is stable support provided for the assembly bracket, but the load-bearing performance of the corbel support is also guaranteed. Setting the assembly bracket on the corbel support can provide a stable load-bearing structure during construction.

The utility model relates to the field of steel structure machining, and particularly discloses a steel pipe cutting device which comprises a box body, a working table is fixedly connected to the box body, a cutting device sliding transversely is arranged in the box body, a cutting groove is formed in the working table, supporting groove pieces are arranged on the two sides of the cutting groove, and first electromagnets are installed in grooves of the supporting groove pieces in an embedded mode. A transparent cover is fixedly connected to the workbench, the cutting groove is located in the transparent cover, a penetrating through hole is formed in the transparent cover, and a fixed-length baffle assembly is fixedly connected to the portion, located on the discharging side, of the workbench. According to the steel pipe cutting device, batch cutting of steel pipes can be achieved, the cutting efficiency is greatly improved, cutting scraps are prevented from flying everywhere, the space environment of a workshop is improved, workers are protected, damage to the steel pipes in the fixing process is avoided, and the stress performance of the steel pipes is guaranteed.

The present invention provides a connection structure of a steel-concrete composite continuous beam in a negative bending moment zone, comprising steel main beams arranged at intervals and end cross beams located between adjacent steel main beams, and an open hole connection steel plate is arranged between the tops of adjacent steel main beams, and the open hole connection steel plate is provided with a plurality of first shear nails for fixing the open hole connection steel plate to the upper flange plate. The present invention has a reasonable design and a simple structure, and the upper flanges of adjacent steel main beams are connected as one by inserting the shear nails on the top of the steel main beam through the open hole connection steel plate, which effectively solves the problem of discontinuity at the end of the steel main beam, and at the same time improves the adverse effects of compression of the steel beam and tension of the concrete slab in the negative bending moment zone of the steel-concrete composite simply supported continuous beam, thereby ensuring the overall force performance and seismic performance of the steel-concrete composite continuous beam.

The utility model relates to the technical field of open caisson construction, and provides an open caisson internal supporting operation platform which comprises an open caisson wall. The horizontal pre-buried casing pipe is mounted in the open caisson wall body; the inclined pre-embedded sleeve is mounted in the open caisson wall body and is positioned below the horizontal pre-embedded sleeve; the horizontal supporting rod is inserted into the horizontal embedded sleeve, and a movable groove is formed in the top of the horizontal supporting rod. The horizontal supporting rods are inserted into the horizontal pre-embedded sleeves, the inclined supporting rods are inserted into the inclined pre-embedded sleeves, meanwhile, the inclined supporting rods and the horizontal supporting rods are connected, so that the stress performance of the horizontal supporting rods is guaranteed, and then the scaffold boards are erected, so that the operation platform can be erected and installed; therefore, the effect of rapidly erecting and installing the operation platform is achieved, the operation process is simple and rapid, the installation risk is conveniently reduced, and the installation safety of the operation platform and the construction efficiency of the open caisson are effectively improved.

The utility model discloses a kind of reconstruction and extension highway subgrade splicing place step type reinforcing structure, it is related to highway engineering technical field.The structure includes old subgrade and new subgrade, and old subgrade splicing side is opened multiple steps, and new subgrade filling is embedded step and forms occlusal structure;Step top surface is provided with the horizontal slope of inward inclination, and the included angle of vertical surface and horizontal plane is 60 °-80 °;Step is provided with anchoring hole at interval, and anchor rod is penetrated in hole, and one end is anchored in old subgrade, and the other end extends to new subgrade and is fixed by anchorage device.It also includes geogrid, V-shaped groove and convex occlusal structure, reinforced concrete rib beam, drainage system and foam light soil transition layer etc.The structure is strengthened by multiple measures new and old subgrade integrity, shear performance and drainage capacity, reduce settlement difference, effectively solve the disease problem existing in traditional splicing technology, improve highway stability and service life.

This invention discloses a method for preparing a fully composite material rod with joints, belonging to the field of composite material connection technology. The method includes the following steps: S10, preparing a composite material rod body, pre-processing both ends of the composite material rod body with a rod body mold, removing the rod body mold after pre-processing to form the rod body component; S20, molding the composite material joint and composite material transition piece separately, then pressurizing and merging the composite material joint and composite material transition piece into a connecting joint; S30, integrally molding the connecting joint and the rod body component, and pressurizing and curing to complete the fully composite material rod product with joints. The fully composite material rod prepared by this invention has no metal parts, no fasteners, and minimizes thermal stress at high temperatures; the mold processing is simple, with no special processing required for the rod mold, connecting piece mold, and transition piece mold; the fiber continuity between the rod and the joint is good, ensuring the stress performance of the rod.

The utility model discloses an embedded part connecting structure, and relates to the technical field of embedded parts. Comprising an embedded plate and a plurality of anchor bars connected with the embedded plate. The embedded plate is detachably connected with a formwork used for concrete pouring through a plurality of bolt assemblies. An adjusting assembly is arranged between the anchor bar and the embedded plate; the adjusting assembly comprises a sliding rail and a sliding block matched with the sliding rail. The sliding rail is connected with the embedded plate, and the sliding block is connected with the anchor bar. Two sliding grooves are formed in the sliding rail, and limiting units used for limiting the sliding blocks are connected to the sliding grooves in a sliding mode. According to the utility model, the embedded plate is connected with the template through the bolt assembly, so that the positioning precision and the construction speed of the embedded part are improved; by arranging the adjusting assembly between the anchor bar and the embedded plate, the position of the anchor bar is adjustable, the problem that the anchor bar conflicts with the steel bar position of the concrete structure is solved, the position of the steel bar does not need to be adjusted, the situation that the thickness of a protective layer and the distance between the steel bars do not meet the standard requirement is avoided, and the stress performance of a concrete member is guaranteed.

The utility model relates to the technical field of hub units, and discloses a less-cutting automobile hub unit which comprises a bearing outer ring, a flange plate body is integrally formed on the circumferential surface of the bearing outer ring, and a plurality of bolts extending to the bottom of the flange plate body are in threaded connection with the top of the flange plate body. The flange plate comprises a flange plate body, a plurality of clamping seats are arranged at the top of the flange plate body, a rubber sleeve is tightly attached to the bottom of the flange plate body, the inner side of the rubber sleeve is connected with a bolt in a sleeving mode, and the outer side of the flange plate body is connected with a protective sleeve in a sleeving mode. According to the few-chip automobile hub unit, the detachable protection assembly is arranged on the outer side, the outer side of the automobile hub unit can be effectively protected, the protection assembly can be replaced in time when damaged, additionally-arranged assemblies are symmetrically distributed at equal intervals, and therefore the structural stability and the balanced stress performance can be guaranteed, the service life of the automobile hub unit is prolonged, and the service life of the automobile hub unit is prolonged. And the purpose of effective protection is achieved on the whole.

The utility model belongs to the technical field of building structures, and particularly relates to a square steel tube concrete beam column component based on a double-T-plate type node form. The device comprises a cross-shaped connecting piece, an upper column body and a lower column body, wherein the cross-shaped connecting piece is shaped like a Chinese character'jing 'in an overlook view angle; the upper column body and the lower column body are coaxially arranged with the axis of the cross-shaped connecting piece; inserting grooves are formed in the adjacent ends of the upper column body and the lower column body, and the two column bodies can move oppositely and are inserted into the top and the bottom of the cross-shaped connecting piece through the inserting grooves till the adjacent ends are close to each other or attached to each other. And the part, extending out of the column sides of the upper column body and the lower column body, of the cross-shaped connecting piece forms an insertion opening into which the horizontal beam body can be transversely inserted. The structure has the advantages of being compact and reasonable in structure and convenient and fast to construct, the stress of the node core area is good, and the labor cost and the time cost can be effectively reduced.

The utility model discloses a kind of concrete distributing machine supporting foot support structure and supporting device, belong to building construction technical field.A kind of concrete distributing machine supporting foot support structure, it includes support frame, adjusting screw rod, support frame connecting rod, support frame includes the top plate and bottom plate of rectangle, multiple support skeletons are fixedly connected between top plate and bottom plate, cross brace is fixedly connected between support skeleton, reinforcing angle is respectively fixed in the upper portion four side positions of top plate, the bottom plate bottom four corner positions of support frame are respectively fixedly connected with a vertically arranged adjusting screw rod, adjusting screw nut is threadedly connected on adjusting screw rod, the lower portion of each adjusting screw rod is movably sleeved with a support frame connecting rod.The utility model can make that distributing machine support is completely independent of the reinforcing mesh of structure to be poured, formwork, distributing machine construction load can be directly transmitted to scaffold foundation, is no longer by reinforcing bar, formwork stress, avoid the security and quality problem brought by distributing machine load acting on reinforcing bar, formwork.