1067 results about "Abutment" patented technology

A water flosser with a unidirectional sealing device includes a shell and a second check valve. A water storage chamber and a liquid outlet communicated to the water storage chamber are provided inside the shell. The liquid outlet is arranged at a bottom of the water storage chamber. The shell downwards extends along an edge of the liquid outlet to form a first abutment block. A protruding second abutment block is arranged in the shell; the second abutment block is arranged towards the first abutment block. The second check valve is provided with an abutment board. The first abutment block abuts against an upper surface of the abutment board. The second abutment block abuts against a lower surface of the abutment board, to limit the second check valve between the first abutment block and the second abutment block.

The invention discloses a simply-supported bridge external prestress supporting structure and an implementation method thereof, and relates to the technical field of bridge reinforcing engineering, the simply-supported bridge external prestress supporting structure comprises a bridge, a bridge abutment or a bridge pier, and further comprises an oblique supporting system, and the oblique supporting system comprises oblique supporting rods, hinge plates, anchoring plates, reinforcing rods and longitudinal tie bars; the hinged plate is anchored on a bridge abutment or a bridge pier, one end of each oblique supporting rod is supported at the bottom of the bridge, the other end of each oblique supporting rod is hinged to the hinged plate, the anchoring plate is a full-length steel plate and is anchored through the reinforcing and reinforcing rods driven into the bridge abutment or the bridge pier, and one reinforcing and reinforcing rod is arranged at the installation position of each oblique supporting rod. The longitudinal tie bars are connected with the anchoring plates and the inclined supporting rods, and the inclined supporting rods are tensioned to support the bridge. The bearing capacity of the bridge is increased at low cost through in-vitro reinforcement, so that the traffic safety under the condition that the traffic load of the bridge is increased for a short time is met, and meanwhile, the adverse effects of reinforcement and reconstruction on traffic are reduced.

The invention provides a separated anti-seismic bridge abutment structure in a high-intensity earthquake area. The anti-seismic bridge abutment structure comprises a pile foundation; the platform body is mounted above the pile foundation and is connected to the lower part of the main beam through a seismic mitigation and isolation support; the box-type back wall is mounted at the rear upper part of the platform body and is not connected with the platform body; one end of the limiting pull rod is mounted on the transverse partition plate of the main beam, and the other end is mounted on the box-type back wall; the anti-lateral pile is mounted below the box type back wall; the rear portion of the box type back wall and the peripheral sides of the pile tops of the anti-lateral piles are filled with energy dissipation materials. Collision buffering materials are filled between the main beam and the box type back wall. From the perspective of'function separation to improve system reliability ', the vertical bearing function and the horizontal bearing function of a traditional seat-type bridge abutment are separated, and the horizontal bearing structure is specially designed, so that the problems of girder falling and the like caused by insufficient limiting capability of the traditional seat-type bridge abutment on a girder in the longitudinal bridge direction in an earthquake are solved, and the safety of the system is improved. And the anti-seismic requirement is fully met.

The utility model discloses a bridge ship collision prevention active protection device which comprises a laser range finder, a control assembly, a main bridge pier, a main bridge bearing platform, a separation type ship collision prevention facility structure, a polyurethane foam rotary drum and a riverbed, the laser range finder and the control assembly are arranged on the upper portion of the main bridge pier, and the main bridge bearing platform is arranged at the bottom of the main bridge pier. A plurality of separated ship collision prevention facility structures are arranged on the periphery of the main bridge bearing platform on the main bridge piers, polyurethane foam rotating cylinders are arranged on the separated ship collision prevention facility structures, and the other ends, away from the polyurethane foam rotating cylinders, of the separated ship collision prevention facility structures are used for being buried in a riverbed to be fixed. When the distance between the ship and the main bridge pier is detected to be smaller than a certain range through the optical distance measuring instrument, the control assembly controls the gas generator to inflate the gas bag to generate buoyancy, the polyurethane foam rotating drum is pulled to the water surface through the buoyancy to make contact with the ship, and the situation that the ship collides with the main bridge pier and consequently the main bridge pier is damaged is prevented.

The invention relates to a bridge abutment settlement deformation monitoring device and method, and belongs to the field of bridge monitoring, the bridge abutment settlement deformation monitoring device comprises two bearing frames arranged on one side of a bridge pier and a steel wire rope I arranged between the bearing frames and used for supporting a connecting support, and the top of the connecting support is provided with a monitoring mechanism; the monitoring mechanism comprises a plurality of piston cylinders adjustably arranged at the top of the connecting support, piston push rods are slidably arranged at the tops of the piston cylinders, extension rod pieces fixedly connected with the piston push rods are fixedly arranged on one side of the pier, and display sleeves are fixedly arranged on the two sides of the connecting support. The display sleeve is communicated with the piston cylinder body through a connecting pipeline and used for transmitting liquid prefabricated in the piston cylinder body, and a piston sliding block is arranged in the display sleeve in a sliding mode. The double steel wire ropes and the tension jack form an elastic supporting system to buffer vibration, the hydraulic linkage design converts tiny settlement into visual displacement, the spring reset mechanism is matched to improve data reliability, automatic reset is achieved, continuous monitoring is supported, and the monitoring range is expanded.

The present invention relates to a two-way jacking construction method for a bridge with a complex vertical curve on a two-way longitudinal slope. The specific steps are as follows: The main girder is divided into a left main girder and a right main girder. Erection supports and jacking piers are arranged in the steel structure assembly area, and at the same time, jacking piers in the water are arranged. Walking jacks and steel bearing beams are arranged on the jacking piers and the bridge abutments; The left main girder and the right main girder are assembled, and the assembled left main girder and right main girder are both rotated by a certain angle with the closure end as the rotation point to make the left main girder and the right main girder in a horizontal position, and the guide beam is welded; Jacked to the designated position; After the left main girder and the right main girder are jacked to the jacking piers in the water, the guide beam is removed and the alignment of the main girder is adjusted; The left main girder and the right main girder are closed at the mid-span and the girders are lowered. The present invention transforms the jacking construction of a bridge with a complex vertical curve on a two-way large longitudinal slope into two simple horizontal jacking constructions of the bridge. The jacking process is greatly simplified, the workload of adjusting the pads of each jacking pier is reduced, the operation is simple and safe, the process is concise, and it has remarkable economic benefits.

The invention provides a composite pile foundation structure for road surface rigidity optimization of a road transition section and a design and use method of the composite pile foundation structure, and relates to the technical field of composite pile foundations. The composite pile foundation structure can be applied to an embankment foundation and a bridge abutment pile foundation and comprises a bearing platform, a pile cap, a gasket, an elastic composite plate, replaceable filler, a pile and a pile end self-adaptive deformer. The design and use method of the bridge abutment pile foundation is guided by the load settlement characteristic of the butted roadbed, and the design and use method of the embankment composite pile foundation is guided by the settlement control standard. Design variables comprise the pile length, the pile diameter, the pile number, the compression thickness of the elastic composite plate, the arrangement depth of the replaceable filler, the limit pile side friction resistance of the replaceable filler and the compression modulus of the replaceable material, the structure can optimize the overall rigidity of the road surface on one side of the abutment, the phenomenon of bump of the abutment is effectively avoided, zero-differential settlement is achieved theoretically, and the construction efficiency is improved. And the settlement index can be controlled in the application of an embankment foundation.

The present disclosure provides an abutment structure and an abutment method thereof. The abutment structure includes a body portion, an abutment portion, and an elastic element, so that an elastic abutment space is formed between the body portion and the abutment portion. Alternatively, the abutment structure is provided with a wheel member, so that an elastic abutment space is formed between the abutment portion and the wheel member and the body portion. Smoother movement and effects of abutment and limitation can be achieved through the abutment portion, the wheel member, or cooperation between the abutment portion and the wheel member.

The utility model relates to a hole collapse prevention device in a coal seam gas extraction drill hole, which belongs to the technical field of coal seam gas extraction and comprises a central column positioned at the center, and a hole is formed in the central column along the height direction; and an abutting mechanism for resisting the pressure of the coal body and a control mechanism are arranged outside the central column. The multiple abutting mechanisms are arranged on the periphery of the center column and distributed in a circumferential array mode. Each abutting mechanism comprises a connecting plate, and the connecting plates are parallel to the central axis of the central column. And two groups of abutting assemblies which are symmetrically arranged up and down are arranged between the connecting plate and the central column. An irreversible elastic piece is fixedly installed between the center column and the connecting plate, so that the movable plate and the inner wall of the drill hole are confronted, and therefore the drill hole is prevented from collapsing. The abutting mechanism and the control mechanism comprise a plurality of springs, the counterforce is improved, and therefore the hole collapse prevention effect is improved.

The utility model belongs to the technical field of wall water seepage testing, and particularly relates to an outer wall water seepage testing device for engineering supervision, which comprises a base, an L-shaped plate fixed at the right end of the base, a portal frame fixed at the upper end of the L-shaped plate, a screw rod rotationally assembled on the rear side of the portal frame, a driving component arranged on the screw rod and a sliding block in threaded connection with the screw rod, the right side of the sliding block is connected with an abutting shell, a water leakage groove is formed in the lower end of the abutting shell, and a water receiving box located on the lower side of the abutting shell is installed in the L-shaped plate. The spraying height can be adjusted, clean water can be prevented from splashing by arranging the abutting shell, water flows downwards into the water receiving box through the water leakage groove to be collected, the water in the water receiving box is pumped into the water storage tank again by arranging the water pump, recycling is achieved, and water resources are saved.

The invention relates to an assembly type steel structure center bearing column which comprises a concrete base, and an installation groove cavity is formed in the concrete base. A plurality of groups of prefabricated steel supports are arranged in the mounting groove cavity, and an inserting cavity is defined by the plurality of groups of prefabricated steel supports; the outer wall of the center adjusting supporting pipe is combined with the inserting cavity in an abutting mode. The lower end of the central column is combined with the bottom of the mounting cavity; the profile steel cross beams are horizontally arranged at the upper end of the center stand column, the middle connecting bodies are arranged at the connecting ends of the adjacent profile steel cross beams, rigid ropes are arranged on the middle connecting bodies, one ends of the rigid ropes are connected with the center adjusting supporting pipe, and the adjusting mechanism adjusts the center adjusting supporting pipe to ascend and descend in the vertical direction to tension the rigid ropes. The center bearing column can facilitate installation of the stand column and the base and can support the stand column so as to resist uneven horizontal torque applied to the stand column by a profile steel cross beam, the combination stability of the stand column and the base is ensured, and the stability of a whole steel structure building is ensured.

The invention discloses a vibration displacement sensor system for bridge operation monitoring and a use method thereof, and belongs to the technical field of bridge engineering. The system comprises data acquisition ends and data receiving and processing ends, the data acquisition ends are fixed to bridge piers, bridge abutments or the side faces of beam slabs, each data acquisition end comprises a capacitive acceleration sensor, a microwave signal antenna, a double-lithium battery pack and a solar cell panel, and the data receiving and processing ends are installed at stable positions of the two banks of a bridge. Comprising a multi-channel microwave receiving module, an edge computing unit, a 4G / 5G / LoRa / NB-IoT multi-network transmission module and a phase difference computing module. According to the invention, the problems of insufficient stability and poor environmental adaptability of existing data transmission are solved. According to the invention, through integration of temperature compensation, anti-interference communication, intelligent power supply optimization and rapid installation design, high-precision, all-weather and low-power-consumption monitoring is realized.

Disclosed in the present invention is an overall construction process for a floating bridge. The process comprises: procedure I, in which a plurality of floating bridge sections are assembled on a water surface, with each floating bridge section being assembled by welding; procedure II, in which the plurality of floating bridge sections are assembled into a floating bridge body; procedure III, in which a shore connection cable-stayed bridge, a bridge abutment, and a suction anchor of a mooring system are constructed; procedure IV, in which a shore-side end of a floating bridge transition section is connected to a water-side end of the bridge abutment; procedure V, in which one end of the floating bridge body is connected to a water-side end of the floating bridge transition section; procedure VI, in which the other end of the floating bridge body is connected to a water-side end of the shore connection cable-stayed bridge; and procedure VII, in which the floating bridge body is connected to the mooring system. In the procedures IV and V, the cooperation of four winches and four cable piles and the guide of a guide mechanism are used; and in the procedure VI, the cooperation of the four winches and the four cable piles is used. The present invention can effectively ensure smooth and safe transition between two ends of a floating bridge column body and a shore connection structure.

An assembly type rotatable bridgehead steel transition slab under surface mine heavy traffic comprises H-shaped steel longitudinal beams, transverse partition plates, anti-sliding steel panels, connecting pin shafts, TST elastic plastic bodies, sleeper beams, expansion joint steel plates, steel bridge steel box girders and steel bridge abutment cover beams. The H-shaped steel longitudinal beams are arranged at equal intervals in the transverse bridge direction, the transverse partition plates are arranged in the longitudinal bridge direction, and the anti-sliding steel panel is arranged on the H-shaped steel and connected with the H-shaped steel and the transverse partition plates into a whole. The rotating steel plate is used for connecting the main beam web and the H-shaped steel web of the butt strap, and the rotating pin shaft penetrates through the lug plate to connect the main beam and the butt strap into a whole to achieve the rotating purpose. The TST elastic-plastic body is arranged on a bridge abutment cover beam and below an H-shaped steel longitudinal beam. And the expansion joint steel plate is arranged on the bridge head expansion joint. And the sleeper beam is arranged at the tail part of the steel butt strap. The device can be disassembled, assembled and reused according to the displacement of the steel bridge, and the steel transition slab can rotate, so that the bridgehead roadbed is allowed to generate certain settlement. And when the settlement is too large, backfilling and filling treatment can be carried out.

The invention discloses a reinforced soil bridge abutment system in a frozen soil area and a construction method of the reinforced soil bridge abutment system. The reinforced soil bridge abutment system comprises a reinforced soil bridge abutment body, a ground source heat pump regulation and control system, a clean energy power supply system and a monitoring system. The reinforced soil bridge abutment body comprises filling soil, rib materials and a prefabricated modular wall face, a buried circulating pipe group of the ground source heat pump regulation and control system deeply penetrates through a frozen soil layer to a stable soil layer, and a heat pump host transfers heat of a bridge abutment base in a high-temperature season to prevent frozen soil from melting by means of a double-circulation pipeline and depending on temperature sensor data and weather forecast data. And reversely supplementing heat in low-temperature seasons to inhibit frost heaving. The heat pump host and the monitoring system of the clean energy power supply system supply power in a time-sharing manner to guarantee core functions. The monitoring system comprises a temperature sensor, a strain gauge and an inclinometer. The problems of stability and frost heaving and thaw collapse of the abutment in the frozen soil area are effectively solved, and economic and social benefits are achieved.

The invention discloses a dam abutment three-dimensional block stability analysis method based on 3DE. The method comprises the following steps: constructing a three-dimensional geologic model in a dam abutment area in 3DE; dividing the three-dimensional block body of the dam abutment into discrete block bodies according to the spatial cutting relation of the structural surfaces; the direction of the intersecting line between the side sliding surface and the bottom sliding surface is defined as the possible sliding direction of the dam abutment three-dimensional block; taking the mass center of each discrete block as a starting point, and drawing a vector along the action direction of each type of load; obtaining resultant force vectors of the corresponding discrete blocks in an absolute coordinate system; determining possible sliding force borne by the dam abutment three-dimensional block and normal force of each sliding surface; the possible anti-sliding force borne by the dam abutment three-dimensional block is obtained. According to the method, the block morphology and the load distribution are visually displayed in a three-dimensional form, the possible sliding direction, the possible sliding force and the possible anti-sliding force of the three-dimensional block of the dam abutment can be automatically determined, the calculation efficiency is improved, and the accuracy of a calculation result is ensured.

The utility model relates to the technical field of bridge structures or buildings, in particular to an assembly type seismic mitigation and isolation support with a novel anchoring structure, a lower seat plate, a middle seat plate and an upper seat plate are sequentially arranged from bottom to top, the lower seat plate is of an assembly type structure, and the lower seat plate comprises a lower seat plate base plate, a lower seat plate inserting plate and an anchoring part. The lower seat plate base plate and the lower seat plate inserting plate are connected into a whole, the anchoring part penetrates through the lower seat plate base plate to be connected with the abutment cushion stone, and the anchoring part completely enters the lower seat plate base plate to be used for reducing the assembling difficulty when the assembly type shock absorption and isolation support is installed. According to the utility model, the anchoring part is improved, so that the height of the anchoring part can be reduced while the connecting length is ensured, and the installation is convenient; meanwhile, the anchoring part is optimally designed, the self-locking effect of the anchoring part is improved, and the reliability of the device is improved.

The present invention relates to the technical field of measuring equipment, and specifically to a measuring device for road maintenance and repair, comprising a rod body and a rod head, wherein the rod head is rotatably mounted at the lower end of the rod body and is used to be inserted into the interior of a pipe, and a contactor is provided inside the rod head; an opening is provided on the outer end surface of the rod head, and the contactor includes a push rod that can be rotated out from the opening and abut against the inner wall of the pipe, and an identification rod that can be guided and slid along the axis direction of the rod body is provided on the upper part of the push rod, and when the push rod rotates inwardly or outwardly, the identification rod slides upwardly or downward synchronously. The present invention provides a rotatable rod head at the front end of the rod body, and provides a push rod in the rod head that can abut against the inner wall of the pipe to be inspected, and through the rotation of the push rod, different action relationships can be generated with the protrusions or depressions of the inner wall of the pipe, thereby allowing the identification rod to perform corresponding actions, so that the situation inside the pipe can be clearly understood.

The invention relates to an adjustable variable-rigidity limiting damping device, and belongs to the technical field of bridge construction. Comprising an upper connecting seat plate, a lower connecting seat plate and a limiting damper assembly, and the limiting damper assembly comprises a damper plunger, a damper cover plate, a damper cylinder body, a variable stiffness damping spring and a disc spring. The abutment and the beam body are connected into a whole in the connecting mode. The limiting damper is used for restraining movement of the beam body in the bridge direction, providing longitudinal displacement limitation between the beam body and the abutment and dissipating vibration energy. The device has two operating states with different rigidities, and can meet the requirements under different seismic intensities. Specifically, under the action of different horizontal forces, the device can generate different displacement responses. Meanwhile, by integrating two different damping media, a double energy consumption mechanism is achieved, and the short-distance damping effect is provided under the normal use working condition (small displacement); when an earthquake occurs, the damping effect can be remarkably enhanced under long-distance displacement.

A lifting clamp is provided, comprising a sliding rail, an abutment device that is arranged to be displaceable on the sliding rail, having at least one abutment element for a workpiece, wherein an axis of displacement of the abutment device on the sliding rail is parallel to a direction of spacing between a stand arrangement and the at least one abutment element, a first movement mechanism having a pushing device, having an actuation lever that is coupled to the pushing device to bring about a lifting function of the lifting clamp, a second movement mechanism with a lowering lever to bring about a lowering function, and a third movement mechanism with a release lever for freeing the displaceability of the at least one abutment device on the sliding rail. The lowering lever and / or the release lever is positioned between the actuation lever and the counter-element.

The invention belongs to the technical field of bridge monitoring, particularly relates to a bridge abutment settlement deformation monitoring device, and provides the following scheme aiming at the problems that time and labor are wasted and a result cannot be quickly and obviously known when a level gauge is used for monitoring bridge abutment settlement in the prior art. The fixing plate I is fixed on the side surface of a detected bridge pier and close to the top end, the tensioning plate seat I and the tensioning plate seat II are fixed on the same side of a front bridge pier and a rear bridge pier of the detected bridge pier and close to the top end, the same indicating mechanism is fixed between the tensioning plate seat I and the tensioning plate seat II, and the indicating mechanism comprises a spherical shell monitoring cap with a downward opening. According to the invention, during monitoring, the monitoring rod and the vertical rod in the indicating mechanism can be ensured to form relative separation, once the middle detected pier is settled, the compression spring is lengthened and the inner sliding rod axially slides, and at the moment, whether the detected pier is settled or not and the settlement amplitude can be obtained only by observing the slippage amount of the inner sliding rod.

The invention relates to the technical field of tunnel construction devices, in particular to a tunnel secondary lining vault water seepage prevention construction device and a construction method.The tunnel secondary lining vault water seepage prevention construction device comprises a plurality of supporting frames, linkage rods, butt joint rods, bearing rods, angle adjusting mechanisms and self-adaptive abutting mechanisms; a linkage rod is rotationally connected to one ends of the tops of every two adjacent supporting frames, a butt joint rod is further arranged between every two adjacent supporting frames, overall radian adjustment is achieved through a sectional type supporting and abutting structure and a connecting rod mechanism, the device can adapt to tunnel vaults with different curvatures, gaps are eliminated, a universal joint is used for driving a worm to drive a worm gear, and the overall radian is adjusted. The worm gear and the worm have self-locking performance, stability after pressing is ensured, the transmission ratio design optimizes the adjusting efficiency, the mechanical transmission technology and the flexible adjusting technology are integrated, and the construction quality of secondary lining water seepage prevention is remarkably improved.

The invention discloses a railway ballastless track steel truss girder end transition structure and a construction method. In order to ensure the safety of train operation, the requirement of railway bridge design on the limited value of the beam end corner is met. The device comprises a steel truss girder, wherein bridge deck overhanging longitudinal beams are rigidly connected to the two longitudinal sides of the steel truss girder respectively; a concrete simply supported beam and a bridge abutment are respectively arranged on two longitudinal sides of the steel truss girder; one side of the concrete simply supported beam is rigidly connected with a concrete simply supported beam longitudinal cantilever; the bridge deck overhanging longitudinal beam on one side is supported on the concrete simply supported beam longitudinal cantilever, and the bridge deck overhanging longitudinal beam on the other side is supported on the bridge abutment. By means of the railway ballastless track steel truss girder end transition structure, the problem that when a railway ballastless track steel truss girder is in transition with a conventional simply supported beam and a bridge abutment, a girder end corner is too large and exceeds a standard limit value can be solved.

A reusable precast concrete slab connecting structure and a mounting method therefor, relating to the technical field of prefabricated buildings. The connecting structure comprises precast concrete slabs and a second connecting assembly. Each precast concrete slab comprises concrete, steel bars located in the concrete, and a first connecting member exposed out of the concrete, the first connecting member has a first side face and a second side face which are oppositely arranged, the first side face of the first connecting member is connected to the steel bars, and second side faces of first connecting members of adjacent precast concrete slabs are in direct abutment. The second connecting assembly is configured to connect and fix adjacent first connecting members, and the second connecting assembly is detachably connected to the first connecting members. The precast concrete slab connecting structure provided in the present invention solves the problem that the integrally assembled precast floor cannot be disassembled, facilitating repeated utilization of resources. Moreover, the second connecting assembly is configured to connect and fix the first connecting members, reducing the risk of local crushing of concrete at a connecting position, thereby prolonging the service life of the precast concrete slabs.

A slat roof with two substantially parallel beams with a set of parallel slats between them that are rotatably secured to the beams is disclosed. A first beam comprises a set of recesses that are open towards the topside. Each slat has at its extremities a slat shaft, wherein the first slat shaft rests in a corresponding recess. At least one recess is provided with an abutment and the slat shaft that is positioned in the recess is provided with a locking piece that at its topside at least partially abuts against the abutment. The locking piece and the abutment together ensure vertical locking of the first extremity of the slat.

To provide a method of erecting a main girder including a plurality of main girder members connected to each other in a bridge axis direction between two existing main girders facing each other in a bridge width direction, in which a large work site is not required in an earthwork part on the back side of a bridge abutment with high safety.SOLUTION: A main girder member 12 is lifted from below an existing main girder 2 to a space between the two existing main girders 2. The lifted main girder member 12 is carried to the erection position in the bridge axial direction by a carrying truck 27. The main girder member 12 is temporarily supported by a device including temporary support devices 38, 39 supported by the existing main girder 2. The main girder members are connected to each other. The main girder members 12 connected to each other are switched from being temporarily supported by temporary support devices 38, 39 to support by a bearing 50 disposed on a lower structure 9.SELECTED DRAWING: Figure 17

The invention relates to the technical field of tunnels, and provides a tunnel portal section structure suitable for steep terrains and a construction method thereof.A steep rock-soil body is vertically excavated through an upward slope step by step, a soil nailing wall is adopted to support the upward slope while the upward slope is excavated from top to bottom, a box culvert main body, a stand column assembly and a joist assembly are constructed, and the tunnel portal section structure suitable for the steep terrains is constructed. And constructing portal walls and cover arches on the two sides of the tunnel by using the constructed adjacent span bridge, the box culvert main body and the joist assembly as a construction platform, constructing a pipe shed on the basis of the cover arches, backfilling in the second backfilling space to form a second backfilling layer, constructing a shed tunnel assembly, constructing a tunnel hidden hole, and completing the construction of the tunnel portal section structure. According to the double-layer frame structure, the foundation of an upper shed tunnel assembly can be provided, a channel is provided for an existing low-grade road on the lower portion, the double-layer frame structure is used for an adjacent bridge and a bridge abutment, meanwhile, the upper portion of the box culvert is backfilled to the top face of the joist, a construction platform can be provided for tunnel entering, the lateral soil pressure of a mountain can be resisted, and the construction safety is high.

The invention provides a quick mounting, positioning and measuring method for a highway bridge stand column embedded steel bar jig frame. The quick mounting, positioning and measuring method comprises the steps that a positioning plate is manufactured; assembling the positioning jig frame; arranging a total station on a control point of the forced centering observation pillar; pier column embedded steel bars are bound through the positioning plates; setting out a bearing platform sideline and a pier column embedded steel bar sideline by the total station; pier column embedded steel bars are in place, bearing platform steel bars are bound, and a bearing platform steel formwork is installed; the positioning jig frame is arranged on a pier column embedded steel bar and is positioned between the pier column embedded steel bar and a bearing platform steel template through a plurality of chain blocks; a prism is erected on the axis point, and the construction coordinate of the axis point is obtained through a total station; when the axis point error exceeds the limit, the plane position of the positioning jig frame is adjusted through a chain block; fixing the positioning plate and the pier column embedded steel bar; and pouring concrete. The invention relates to the technical field of bridge engineering construction, and can solve the problems of low mounting precision of pier column embedded steel bars, displacement of the pier column steel bars caused by concrete pouring and low efficiency in plane position adjustment of the pier column embedded steel bars.

The invention relates to the technical field of bridge construction, and particularly discloses a bridge double-side column pier formwork and a construction method.The bridge double-side column pier formwork comprises a plurality of left formwork sets and a plurality of right formwork sets, the left formwork sets and the right formwork sets are the same in structure and are in mirror symmetry, and each left formwork set is composed of three outer side plates and one inner side plate; reinforcing ribs are arranged on the outer surface of the outer side plate, the inner side plate is located in a gap between the two square columns, an abutting assembly is installed between the left formwork set and the right formwork set, and the abutting assembly comprises a plurality of left sliding blocks horizontally installed on the inner side plate of the left formwork set in a sliding mode and a plurality of right sliding blocks fixedly installed on the inner side plate of the right formwork set. The left sliding blocks and the right sliding blocks correspond to each other in a one-to-one mode, the inner side plates can effectively disperse pressure in a mutual supporting mode, the left sliding blocks and the right sliding blocks can evenly support the inner side faces, the even supporting mechanism prevents the central portions of the inner side plates from bearing too large pressure, and therefore the problem that large deformation possibly occurs is prevented.

The utility model provides a prefabricated block frame type bridge abutment for a mountain abrupt slope section, which comprises a prefabricated cover plate structure, a first supporting structure and a second supporting structure, the first supporting structure and the second supporting structure are arranged along the longitudinal direction of a bridge at intervals, and the prefabricated cover plate structure comprises a plurality of block prefabricated cover plates which are arranged along the transverse direction of the bridge at intervals. The block prefabricated cover plates extend in the longitudinal direction of the bridge, the two ends of each block prefabricated cover plate are fixed to the top of the first supporting structure and the top of the second supporting structure correspondingly, and a breaking joint is reserved between every two adjacent block prefabricated cover plates. Therefore, the problems that an existing integral cast-in-place frame table is complex and difficult to construct, high in risk and long in construction period are solved by adopting the structure assembled and constructed by the prefabricated cover plate structures; and each block prefabricated cover plate is arranged to extend in the longitudinal direction of the bridge so as to enlarge the aspect ratio, so that the stress of a bidirectional plate is simplified into the stress of a unidirectional plate, the stress mode of the cover plate is simplified, only longitudinal stress main ribs need to be arranged, engineering materials are saved, and the engineering cost is reduced.