3651 results about "Pier" patented technology

The invention discloses a damage-controllable self-resetting section prefabricated assembled steel pipe concrete bridge pier and a manufacturing method thereof, and belongs to the field of bridge engineering. An exposed node connecting piece consists of a foot plate, anchor bolts, end connecting plates and buckling restraining sleeves. A connecting plate is mounted between prefabricated steel pipe concrete sections through high-strength bolts; the exposed node connecting piece is connected with each of a cover beam and a bearing platform by utilizing the anchor bolts, and is connected with a prefabricated steel pipe concrete section through the high-strength bolts relying on the end connecting plates. A pre-stressed tendon penetrates through a section prefabricated steel pipe concrete pier; the two ends of the pre-stressed tendon are respectively anchored to the interiors of the bearing platform and the cover beam by using anchorage devices. The energy consumption-controllable self-resetting section prefabricated assembled steel pipe concrete bridge pier disclosed by the invention has the characteristics of small post-seismic residual displacement, high energy consumption capacity, controllable energy consumption, high assembling degree, convenience and quickness in construction process, greenness, high efficiency, energy conservation, environment friendliness, easiness in factory production, convenience and quickness in construction, and the like; the construction period of the pier can be remarkably shortened.

The invention provides a pier column pre-casting splicing construction technique working method, which is characterized in that: on a land construction site, a pier body of the whole bridge pier is pre-cast by segments, pier body end heads of each segment are buried with outwardly-extending reinforcement bars, and all segments are transferred to the pier construction site for pier assembly. The working method has the advantages of having light bridge piers, reducing the number of projects, saving manpower, lowering construction costs, having good construction quality and quick construction, solving the problems of reliability, safety, anti-crack property and durability between pier columns pre-cast by segments and between the pier columns and a bearing platform connecting structure, reducing the influence of natural conditions on construction period, reducing construction cost and construction risk, reducing the number of cast-in-situ concrete and equipment such as a hoisting machine and the like and effectively saving cost. Due to the advantages of the splicing type bridge pier and the development of various high strength concrete materials in recent years, the working method is applied to water bridges with large scale, multiple bridge spans, adverse natural environment, and difficult construction due to the influence of wind, wave, current, rain and fog.

The invention discloses a method for testing a deflection/longitudinal displacement change of a bridge based on a four-quadrant position detector. The method is characterized by comprising the following steps: firstly, the four-quadrant position detector is installed in the centre of the bridge or other points to be tested at the bottom of a bridge deck; a laser source is installed on a pier and/or a certain point below the bridge deck through an electric displacement table; then, testing is carried out by matching the four-quadrant detector with the laser source, so that the light spot of laser is over against the centre of the detector; when the deflection of the bridge deck changes, the four-quadrant detector longitudinally moves together with the point to be tested; the light spot position, formed on the four-quadrant detector, of the laser moves oppositely relative to the detector; and different position coordinates of the light spot on the detector before and after the deflection of the bridge changes and light spot position variable quantity on the four-quadrant detector, namely deflection position variable quantity of the point to be tested on the bridge deck can be calculated. The method disclosed by the invention has the advantages of simple structure, good controllability and high precision and is capable of realizing real-time online test of the deflection/longitudinal displacement of the bridge.

The invention relates to a bridge prefabricated hollow pier column post-poured connecting structure. The bridge prefabricated hollow pier column post-poured connecting structure is characterized by comprising a prefabricated hollow pier column, a pier column foundation and a post-poured concrete pier wall, wherein connecting steel plates are pre-buried in the top surface of the pier column foundation, and an installation limiting block limiting the installation position of the prefabricated hollow pier column is arranged at the center of the pier column foundation; the prefabricated hollow pier column is fixed on the pier column foundation through the connecting steel plates; the prefabricated hollow pier column is wrapped by a steel protecting barrel, and a steel rib plate is arranged on the outer wall of the steel protecting barrel; the concrete pier wall is poured on the periphery of the bottom of the prefabricated hollow pier column, and the hollow position in the prefabricated hollow pier column is filled with a concrete filling core section formed by micro-expansion concrete. As the prefabricating process is adopted for the structure, the construction speed is high, connection strength is high, overall stress performance is good, anti-seismic performance is strong, and technological and economical benefits are good. The invention further discloses a construction method for the bridge prefabricated hollow pier column and foundation connecting structure.

The invention relates to an impulse vibrating method for testing the bridge substructure natural frequency of vibration which uses avoirdupois weight to stroke the pier and tests the vibrating response of the pier to analyze and compute the natural frequency of vibration. It uses avoirdupois weight to stroke the pier top part and tests the speed and hastens response of the bridge. It usually dose multi-stroke and uses the recording wave mode superposition to dispel the noise to obtain the accurate response wave mode. It reads the response wave mode to do Fourier analysis to ascertain Fourier frequency spectrum and combines with the peak spectrum to ascertain the natural frequency of vibration of bridge.

The invention relates to the field of construction, in particular to a bridge and a construction method thereof. The bridge and the construction method of the bridge are provided to overcome shortcomings in construction methods of existing bridges, a conventional sequence construction method of performing cast-in-place construction of a beam body after bridge pier construction is finished is changed into a parallel construction operation method of a bridge pier and the beam body. The bridge comprises the bridge pier and the beam body, and the beam body comprises a precast beam body and two side span connecting segments respectively in butt joint with the head end and the tail end of the precast beam body. The bridge pier comprises side piers supported on end sides of the side span connecting segments and main piers symmetrically arranged on two sides of the end of the precast beam body, and a load-bearing beam for supporting the precast beam body is connected between the two main piers positioned on two sides of the end of the precast beam body. The construction method has the advantages of achieving the effects of shortening operating time and reducing cost at once, being high in work efficiency, being not subjected to limitation of a conventional construction process, reducing high-altitude operation difficulty and dangerous sources and improving construction safety for workers.

The invention relates to a construction method of an underground continuous wall below a viaduct. The method specifically includes the first step of staking out in a survey, the second step of guiding wall manufacturing, the third step of width adjustment of the underground continuous wall, the fourth step of slurry preparation, the fifth step of grooving construction, the sixth step of reinforcement cage manufacturing, hoisting and releasing, the seventh step of concrete grouting, the eighth step of repeatedly executing the fifth step, the sixth step and the seventh step till construction of a to-be-formed single-width undergrou nd continuous wall construction unit ends, and the ninth step of underground continuous wall joint processing. By means of the construction method, construction of the underground continuous wall can be fast completed while the quality and the quantity are guaranteed, and a viaduct pier will not be affected. Compared with a cast-in-situ bored pile construction method, the construction method has the beneficial effects that construction speed is high in the construction progress, stratum disturbance is small, and therefore the influences on the viaduct pier are small.

The invention relates to a bridge prefabricated hollow pier stud connecting structure. The bridge prefabricated hollow pier stud connecting structure is characterized by comprising a pier stud foundation and a prefabricated hollow pier stud; the pier stud foundation is provided with an insertion groove for the prefabricated hollow pier stud, the cross section of the insertion groove is in the shape of a big-end-up trapezoid, and an installation locating block is arranged at the bottom of the insertion groove; the prefabricated hollow pier stud is arranged on the upper portion of the pier stud foundation, a T-shaped steel plate is arranged at the joint between the prefabricated hollow pier stud and the top face of an opening of the insertion groove, and gradienters are symmetrically arranged on rib plates of the T-shaped steel plate; a horizontal pre-stressed anchor cable is arranged in the pier stud foundation, a vertical pre-stressed anchor cable is arranged in the prefabricated hollow pier stud, and the hollow position of the prefabricated hollow pier stud is filled with micro-expansion concrete to form a concrete core segment. According to the bridge prefabricated hollow pier stud connecting structure, by the adoption of the precasting process, the construction speed is high, the mutual connection strength is high, the overall stress performance is good, and good technical and economic benefits are obtained. The invention further discloses a construction method of the bridge prefabricated hollow pier stud connecting structure.

The invention discloses an automatic processing irrigation truck for concrete pier for bridge pier, and includes a body plate, a bottom plate is fixed on the end surface of the body plate, and a storage block is fixed on the right side of the end surface of the bottom plate. A processing mechanism is provided in the storage block, and the processing mechanism includes a stirring cavity with an opening facing upward. The agitating chamber is used for containing concrete. The agitating chamber is provided with a rotatable drive shaft. Ten ten agitating rods are evenly fixed on the drive shaft. The device can be used for bridge pier during transportation. The processing of concrete, by means of stirring and spiral circulation, can not only make the processing fully, but also prevent the subsequent layering of the concrete, ensure the quality of the concrete, and use spiral transportation when needed.

The invention relates to a method for installing reinforcing steel for the rollover construction of a high pier and a tower and a moveable bracket thereof. The method for installing the reinforcing steel for the rollover construction of the high pier and the tower has the construction steps as follows: (1) according to the characteristics of the sections of the pier and the tower, a moveable bracket (2) matched with a pier body and a tower body is designed and processed, a movable bracket (3) and reinforcing steel (4) are installed, the moveable brackets are dismounted, a pier body moulding board or a tower body moulding board is installed, concrete (5)for the section of a pier body or the section of a tower body on which the reinforcing steel is bound is cast, hoisting equipment is used for installing the moveable brackets, and finally, the installation and the construction of the next section of reinforcing steel are carried out. The method for installing the reinforcing steel for the rollover construction of the high pier and the tower and the moveable bracket thereof greatly reduce the construction cost and the security risk, and have obvious efficiency of accelerating the engineering speed. The invention provides the method for installing the reinforcing steel and the moveable bracket, which are safe, reliable, economic and convenient, for the construction of the high pier and the tower with the constant section and variable section reinforced concrete used for a suspension bridge, a cable stayed bridge, a continuous rigid frame bridge, a continuous girder bridge and bridges of other types.

The invention discloses a bridge prefabricated foundation and a bed-burying method thereof. The bridge prefabricated foundation consists of a bridge lower part pier body, an undercut bearing platform and a cavity formed by enclosing the pier body and the bearing platform. The undercut bearing platform is reserved with a guide hole, an exhausting recharging hole and a supporting liner plate. The bed-burying method comprises the following steps of: integrally prefabricating the lower part pier body and the bearing platform in a factory; excavating a foundation ditch, and then paving a crash pad layer; and sinking a pile which passes through the crash pad layer and is inserted into a sea (or river) bed. A range of 5 to 30 m below a designed height mark of the top of the pile and is filled with core filling concrete, and a supporting pile and a bearing pile are cut to the designed height mark underwater. The prefabricated foundation is positioned through a guide pile, and is placed on the supporting pile which is provided with a supporting component. The guide pile is cut underwater, and the cavity is poured with concrete to ensure that the prefabricated foundation is firmly connected with the pile. The top surface of the lower part pile body of the bridge prefabricated foundation must be higher than water surface and higher than a splash zone. The bearing platform of the prefabricated foundation is completely buried into the sea (or river) bed to ensure that the water resistance ratio can be reduced, the construction period can be shortened, the influence on the environment can be reduced, and the engineering cost is low.

The invention discloses a measurement and control method for bridge construction. The measurement and control method comprises the measurement on the following parameters: plane control and measurement, elevation control and measurement, perpendicularity control and measurement, beam part construction measurement, template offset correction control, high pier sedimentation and beam body creep monitoring. By using the measurement and control method disclosed by the invention, all corresponding control measures and methods are proposed by analyzing all factors influencing the construction measurement accuracy, so that the influence of human factors on the construction accuracy is scientifically and effectively reduced, and the setting-out accuracy is effectively guaranteed; and the construction method is simple and reliable and the adaptability is wide.

Common methods of construction of side-span cast-in-place sections of long-span continuous bridges of bridge engineering can be summarized into a floor stand method, an attached support method, a hanging bracket method and the like. Due to the limits of terrain conditions, the overhang length and the carrying capacity of a cradle in the floor stand method, the attached support method, the cradle hanging bracket method, the length of a side-span cast-in-place section is often reduced to facilitate construction, and further the bridge structure is not reasonable. The invention provides a hanging bracket supporting system of a side-span cast-in-place section and an implementation method thereof, the hanging bracket supporting system of the side-span cast-in-place section and the implementation method thereof are free from the restrictive conditions of the terrain conditions, the overhang length and the carrying capacity of the cradle and are applicable to the construction of relatively long side-span cast-in-place sections. Besides, according to the hanging bracket supporting system of the side-span cast-in-place section and the implementation method thereof, the problems of small space and insufficient height between a bridge body of a cast-in-place section and a transitional pier are effectively solved, a supporting method of a hanging bracket between a cantilever end and a transitional pier top is provided, adverse effects of the cantilever end on the concrete of the side-span cast-in-place section due to circulating vibration of sunshine temperature differences can be avoided, construction quality control can be facilitated, the material utilization amount is small, and a feasible approach is provided for improvement on side-to-middle span ratio of bridges.

The invention relates to a precast concrete member connected by a straight thread and a pier head lock anchor grouting sleeve, and a method for assembling the precast concrete member, belonging to the technical field of constructional engineering assembly concrete structures. The method of connecting by the straight thread and the pier head lock anchor grouting sleeve is adopted; one end of a reinforcing steel bar is processed into the straight thread (6), and the other end of the reinforcing steel bar is processed into a pier head (5); the inner wall of the end with smaller diameter of a connecting sleeve is processed into a thread (9) which is connected with the reinforcing steel by the straight thread (6) and is used for transmitting force; the inner wall of the end with larger diameter of the connecting sleeve is processed into a thread (16) which is connected with a matched plug ring (10) by an external thread (17); after grouting is carried out through a grouting hole, the original way that the tensile force of the reinforcing steel bar of a prefabricated part connected by grouting is transmitted mainly by bonding is changed by the reinforcing steel bar through lock anchor extrusion and bonding force transmission among the pier head of the reinforcing steel bar, the plug ring, grouting material and the sleeve. The safety and economical efficiency of the connection of the novel precast concrete member are improved.

The invention discloses a Y-type cast-in-place concrete column formwork system. The formwork system is composed of a column root formwork system, a column handle formwork system and a branch column formwork system and comprises multi-layer plates, back edges, column hoops, split bolts, diagonal supporting rods, diagonal pull rods, horizontal pull rods and the like, and all the components are connected to form a whole to be fixedly supported on a floor slab or a plain concrete pier. The invention further discloses a construction method for the Y-type cast-in-place concrete column formwork system. The construction method includes the steps of model designing, sample machining, formwork manufacturing, hoisting, formwork and support reinforcing, positioning control and precision adjusting; when a formwork is installed at the proper position, construction of the column root formwork system is carried out first, then construction of the column handle formwork system is carried out and ultimately construction of the branch column formwork system is carried out. Y-type positioning control is facilitated due to the fact that corner angles are reserved; a wood formwork system is easy to splice and is suitable for structural components with various models, the forming effect of the components meets design requirements, and the manufacturing cost of the wood formwork system is low.

The invention relates to a grid reinforced bar support special-shaped section short shearing force wall and relative producing method. The special-shaped section short shearing wall is formed by hidden post (1) and shearing wall plates. Wherein, it arranges reinforced bar network inside the wall plate and hidden posts at the end and corner of wall branches; when using two-row reinforced bars, the horizontal distributed reinforced bar (4) uses rectangle closed hoop reinforcement and adds intercross grid reinforced bar support between the reinforced bar network while said grid reinforce bar support is made by using drawing reinforced bar (9) to bond or weld the inclined reinforced bar beam (8); when the reinforced bar network uses single-row distributed bar, it arranges grid reinforced bar support at the two sides of reinforced bar network; it inserts hidden post (1) anchorage at the upper and lower ends of inclined reinforced bar beam (8); and both the web and swing wall branch have said grid reinforced bar support. Compared to general short shearing wall, the invention has improved anti-vibration ability, improved loading ability, higher ductility, higher torsional resistance, reduced side rigidity reduction and limited bottom shearing slide.

The invention relates to a mine recyclable steel cylinder packing pier column and a construction method thereof and a method for gob-side entry retaining, which belong to the field of mine laneway support. The steel cylinder packing pier column is a steel cylinder sand and stone packing pier column and consists of a height-adjustable steel cylinder mould and sand and stone packing which is filled in the steel cylinder mould, wherein the sand and stone packing is bulk sand or/and stones which are filled compactly, and also can contain other particulate matters; a filling opening is formed on the top of the steel cylinder mould; a discharging outlet is formed and an openable end cover of the discharging outlet is arranged on the lower part of the steel cylinder mould; two sides of the upper part of the steel cylinder mould are provided with support bases; the pier column is added with water and filled and constructed by a concrete injector; and the steel cylinder mould is taken as an outer wall of the pier column after being filled. The invention also provides a method for recycling the steel cylinder mould of the pier column and a self-advancing pneumatic vibration device. The pier column has a novel and practical structure, is readily available in materials, high in construction efficiency and low in support cost, and is easy to construct; the steel cylinder mould can be recycled for saving steel; and the yielding property of the support of the pier column is greatly improved to ensure that the pier column can meet the requirement that the influence of two-time mining is tolerated by the gob-side entry retaining well and is particularly suitable for the gob-side entry retaining.

The invention relates to a composite foundation composed of a caisson with a steel cavity and piles constructed by the reverse operation method, and a construction method thereof, belonging to the bridge construction technology. The composite foundation comprises a caisson, a foundation bed, and piles. The caisson is composed of a steel cavity, an outer wall, an inner wall with a partition wall structure, a caisson cover, and a caisson bottom platform, wherein the caisson cover is preserved with water pumping and gas delivery holes, which are doubled as inspection holes. The caisson is arranged above the foundation bed and placed inside water, bridge piers are arranged on the caisson cover, the periphery of the caisson bottom platform is connected with the piles constructed by the reverse operation method, and the piles are inserted into the foundation bed and the sea bed or river bed through sinking pile preserved holes. After a foundation trench is excavated, a ship is located by riprapping to form the foundation bed, and the foundation bed is leveled by a platform type foundation bed riprapping leveling ship. The piles are connected with the caisson by pouring concrete in the preserved holes in the caisson. The inventive composite foundation utilizes the buoyancy force of the caisson steel cavity and considers the combined action of the piles, soil and the caisson to share partial external load by the sea bed or the river bed. The composite foundation optimizes the pile foundation design, reduces settlement during bridge service period, and reduces construction cost.

The invention discloses a continuous beam removal construction method, which relates to the field of building construction. The continuous beam removal construction method includes: 1. construction preparation; 2. bridge deck system removal; 3. support locking; 4. bracket erection; 5. Box girder cutting; 6. Demolition of beam blocks; 7. Demolition of bridge piers. First remove asphalt, anti-collision wall and other bridge deck facilities, then set up brackets to cut box girders, and finally hoist beams and chisel out bridge piers to ensure construction safety and efficiency. Professional commanders are set up during the construction process, and operators obey the commanders. Instruct construction to ensure safety.

The invention discloses a prefabricated reinforced concrete hollow pier socket and spigot joint connection structure and a manufacturing method. A component I of the structure is a prefabricated bearing platform; a corresponding pier column groove hole is reserved when the bearing platform is poured and is convenient for connection with a pier column, and meanwhile steel bar anchoring in the bearing platform and penetrating a hole is provided at the socket and spigot position, a component II is a prefabricated hollow pier column; the bottoms of the pier columns are welded through steel plates,holes are reserved in the corresponding positions of the steel plates, bearing platform anchoring steel bars can stretch into the holes conveniently, the overall connecting performance of the pier columns and the bearing platform can be obviously improved, meanwhile, inclined steel wedges are arranged at the corresponding positions of the pier columns and the bearing platform, after the pier columns are inserted, a self-locking function is achieved through rotation, temporary supports are not needed for reinforcement, and construction is facilitated. Meanwhile, interface ripples are arrangedon the surfaces of the pier column and the bearing platform, the connecting and shearing resistance performance is improved, a gap between the pier column and the bearing platform is subjected to crack pouring through UHPC, the socket and spigot joint quality is met to a great extent, and meanwhile the performance of high early strength and rapid construction is achieved. The operation is simple and convenient, the construction is easy and the quality is controllable.

The invention discloses an FRP (Fiber Reinforced Plastic) pipe confined cement based composite material reinforced pier column structure applied to reinforcement of pier columns with all structures. The FRP pipe confined cement based composite material reinforced pier column structure comprises a pier column, a fiber reinforced composite material base arranged at the bottom of the pier column, a fiber reinforced composite material pipe arranged around the pier column, a limiter fixing the position of the fiber reinforced composite material pipe, and an engineering cement based composite material filling a gap between the fiber reinforced composite material pipe and the pier column. The advantages of the fiber reinforced composite material base, the fiber reinforced composite material pipe, the engineering cement based composite material and fiber grid meshes are integrated and can be fully played, the excellent performance of a single material can be greatly improved under the action of mutual adhesion of the fiber reinforced composite material base, the fiber reinforced composite material pipe, the engineering cement based composite material and the fiber grid meshes, and the bearing capacity, the erosion resistibility, the anti-seismic property, the ductility, the fatigue resistance and the durability of the pier column structure are effectively improved.

The invention discloses a method for disassembling a multi-span double-curved arch bridge. The method comprises the following steps that (1) bridge deck structures are disassembled, and a cable hoisting system is erected; (2) fillers above the arch, spandrel arch rings and a transverse wall are sequentially removed; (3) a steel arch frame supporting platform is erected, and a steel arch frame is installed; (4) the arch rings are removed; (5) the steel arch frame supporting platform is removed after the steel arch frame is disassembled; and (6) piers are disassembled. The method does not pollute the water body under the bridge during use, does not affect the passage of a channel ship, and can improve the disassembling construction safety.