CN114673096A

CN114673096A - Swivel beam structure construction process

Info

Publication number: CN114673096A
Application number: CN202210487648.0A
Authority: CN
Inventors: 王兴荣; 冯春林; 赵帅鹏; 李文强; 郭海涛; 黎福壹; 梁芳丽; 张元�; 黄昌明; 张伯聪
Original assignee: Fifth Engineering Co Ltd of Shanghai Civil Engineering Co Ltd of CREC
Current assignee: Fifth Engineering Co Ltd of Shanghai Civil Engineering Co Ltd of CREC
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2022-06-28

Abstract

The invention provides a swivel beam structure construction process, which belongs to the technical field of swivel beam construction, and comprises the following steps of S1: sequentially constructing and installing the spherical hinge, the slide way, the lower rotary table, the upper spherical hinge, the upper bearing platform and the traction steel strand; s2: the continuous beam construction comprises No. 0 block construction, continuous beam symmetrical section hanging basket suspension casting construction, side-span support cast-in-place section construction, turning traction construction, closure section construction and prestress construction; s3: firstly, configuring a welding power supply, then preparing construction materials, hoisting the steel templates in sections, and welding after the hoisting of the steel templates is finished; s4: make protecting wall, erect wall and roof beam body even as an organic whole, then carry out the prefabricated installation of sunshade, the installation of railing, cable duct apron construction, expansion joint installation and the construction of contact net pillar foundation in proper order, this technology is convenient for construct, and the security is high, and construction cost is low.

Description

Swivel beam structure construction process

Technical Field

The invention relates to a swivel beam construction technology, in particular to a swivel beam structure construction process.

Background

The railway bridge has high construction risk and construction difficulty due to spanning of the existing railway line, strict safety protection requirement, higher technical difficulty and longer construction occupied time, influences the whole construction period, and is particularly unfavorable for construction in some hilly areas due to large terrain drop.

Disclosure of Invention

In order to make up for the above deficiencies, the invention provides a swivel beam structure construction process, aiming at solving the problems in the background art.

The invention is realized by the following steps: the swivel beam structure construction process comprises the following steps

S1: constructing a swivel structure, wherein the swivel structure comprises a lower spherical hinge, a slide way, a lower rotary table, an upper spherical hinge, an upper bearing platform and a traction steel strand, and the spherical hinge, the slide way, the lower rotary table, the upper spherical hinge, the upper bearing platform and the traction steel strand are constructed and installed in sequence;

s2: the construction method comprises the following steps of continuous beam construction, wherein the continuous beam construction comprises 0# block construction, continuous beam symmetrical section hanging basket suspension casting construction, side-span support cast-in-place section construction, turning traction construction, closure section construction and prestress construction;

s3: the method comprises the following steps of (1) installing and constructing a mid-span closure section steel shell, configuring a welding power supply, preparing construction materials, hoisting steel templates in sections, and welding after the steel templates are hoisted;

s4: bridge floor auxiliary engineering, at the protective wall during continuous beam construction and erect wall relevant position embedded bar, make protective wall, erect wall and roof beam body even as an organic whole, then carry out water repellent to the protective wall, then carry out prefabricated installation, the installation of railing, cable duct apron construction, expansion joint installation and the construction of contact net pillar foundation of sunshade in proper order.

In one embodiment of the present invention, the mounting of the lower ball joint comprises: a. installing a lower spherical hinge framework: and (4) accurately paying off, namely, paying off a central point and four corner points on the lower bearing table board by using a total station. And (5) hoisting and aligning, hoisting the lower spherical hinge framework to a designed position, centering the stay wires, and manually adjusting and aligning four corner points. And (4) controlling the elevation, measuring the elevation of the four corners, and adjusting the bottom of the framework to ensure the level of the upper plane. Welding and fixing, and firmly welding the embedded steel bars with the framework after the framework is positioned; b. the installation of the lower spherical hinge and the field assembly of the lower spherical hinge mainly comprise the connection of the lower spherical hinge and a framework, the connection of the lower spherical hinge and the framework is realized by bolts, and other components are welded and assembled in a factory. Accurate positioning and adjustment: the lower spherical hinge is suspended by using the framework and the adjusting bolt, the central position is adjusted, and then the elevation is adjusted by means of vertical rotation of the fixed adjusting screw rod.

In one embodiment of the invention, in the step S4, the high polymer modified asphalt treating agent is sprayed on the inner side of the bridge deck protection wall, the high polymer modified asphalt waterproof roll is laid, and the C40 fiber concrete protective layer is covered on the roll, and the total thickness is 60 mm. And (3) brushing polyurethane waterproof paint in the cable groove on the outer side of the protective wall, and covering a C40 fiber concrete protective layer on the waterproof paint, wherein the total thickness is 40 mm. A waterproof coiled material additional layer is pasted with waterproof paint at the root of the protective wall, the thickness of the additional layer coiled material is 0.5mm, the width of the additional layer coiled material is 350mm, 300mm is horizontally paved, 50mm is vertically folded, and then the waterproof coiled material and the protective layer are paved. Firstly, sticking a coiled material additional layer on the opening part of the water discharge pipe by using polyurethane coating; the additional layer coiled material is 0.5mm in thickness, 400X 350mm in length and width, perforated in the middle, cut into a plurality of triangles and tightly attached to the lower inner wall of the water discharge pipe opening. And the edges of the waterproof rolls and the joints of the concrete of the protective layer and the beam body are sealed by polyurethane coating, and the height of the sealed edges is not less than 80 mm. And the lap joint of the waterproof roll is sealed by polyurethane coating.

In one embodiment of the invention, the slideway construction is the same as the lower spherical hinge framework. The slideway is assembled in sections on site and is adjusted and fixed by using an adjusting bolt. The support leg can slide in the slideway during the rotation so as to keep the stable structure of the rotation. The top surface of the slideway is required to be 1cm higher than the top surface of the concrete of the lower turntable, and the whole slideway surface is on the same horizontal plane.

In one embodiment of the invention, the lower spherical hinge is provided with concrete pouring vibrating holes and exhaust holes to ensure that the concrete is compact without holes, and the pouring sequence of the concrete is carried out from the center to the periphery.

7. The swivel beam structure construction process according to claim 1, wherein the mounting steps of the upper spherical hinge are as follows:

a spherical surface of the spherical hinge.

b, placing butter into the center pin shaft sleeve, placing the center pin shaft into the sleeve, and adjusting the verticality and the peripheral gap.

c, sliding pieces are arranged on the concave spherical surface of the lower spherical hinge from inside to outside according to the serial numbers, and all the sliding pieces are positioned on the same spherical surface. After the inspection is qualified, grease is smeared between the sliding plates on the spherical surface, so that the grease is uniformly filled in the space between the sliding plates and is slightly higher than the top surfaces of the sliding plates.

d, hoisting the spherical hinge in place, and sleeving the spherical hinge into the central pin shaft. The position of the upper spherical hinge is finely adjusted by a chain block to be horizontal and vertical to the gap of the outer ring of the lower spherical hinge. The clearance between the pin shaft and the upper and lower spherical hinges and the smoothness between the pin shaft and the steel pipe channel are ensured.

e, protecting the periphery after the hinge is installed, and tightly winding and wrapping the upper spherical hinge and the lower spherical hinge by using an adhesive tape to ensure that impurities do not enter the friction surface.

And f, hoisting the rest planar steel plates and the upper spherical hinge steel casing, adding butter into the sleeve, then putting the pin shaft into the sleeve and rotating the pin shaft, overflowing the butter, and then coating the butter on the pin shaft. A layer of butter is uniformly touched on the surface of the sliding sheet, and the butter is slightly higher than the sliding sheet. The upper spherical hinge is hung on the upper surface of the lower spherical hinge, and the centers of the upper spherical hinge and the lower spherical hinge are overlapped; the upper spherical hinge is rotated to overflow redundant grease, the sliding sheet is well attached to the upper spherical hinge, and the gap between the upper spherical hinge and the lower spherical hinge is closed in time.

g, the spherical mandrel of the lower spherical hinge coincides with the rotation center of the spherical hinge, the central axis of the welded steel pipe of the upper spherical hinge and the lower spherical hinge coincides with the rotation central axis, and the error is not more than 1 mm.

In one embodiment of the invention, the traction steel strand comprises two traction ropes, the traction ropes adopt 12 phi s15.24 steel strands, and the traction ropes adopt 1 forward rotation and 1 backward rotation. The embedded ends of the traction cables in the concrete are anchored by adopting OVM 15-12P-type anchors, the positioning steel plates fixed on the bottom layer steel bars are utilized to determine the plane position and the height of the steel strands, the anchoring ends of the same pair of traction cables are positioned on the same straight line and are symmetrical with the circle center of the rotary table, the embedded height and the traction direction of each cable are consistent, the length of each cable embedded into the rotary table is 3.2m, when the external length is 14.64m, the traction cable supporting steel bars are embedded, and the outer leakage parts of the traction cables are wound around the rotary table template in a circle and are placed on the embedded bars without mutual interference.

In one embodiment of the invention, the No. 0 block bracket adopts a spiral steel pipe section steel bracket. From down to up do in proper order: bearing platform foundation, steel pipe stand, I-steel triangular truss, square wood bamboo plywood die block.

The method comprises the following steps: the bearing platform is used as the foundation of the whole bracket system.

Secondly, steel pipe column: the stand adopts spiral steel pipe, respectively arranges 2 rows along roof beam body central line both sides, and 3 are in every row, along the bridge to every row stand center spacing 3.0 m. The transverse bridge is arranged in 3 rows by taking the center line of the pier as the center, and the distance is 3.3 m.

③ the beam: 2 double-spliced I-shaped steel is welded and placed on a bearing plate at the top of the spiral steel pipe upright post.

Fourthly, triangular truss: the longitudinal beams are formed by combining I-shaped steel, and 12 longitudinal beams are arranged on one side. The arrangement form is as follows: 10 groups of triangular trusses are installed in the area of the single-side web plate and the enlarged block, 3 groups of triangular trusses are paved on the bottom plate, 4I-shaped steel beams are arranged in the area of the single-side flange plate in a full-length mode, and the distance between the I-shaped steel beams is 3 multiplied by 60+9 multiplied by 30+6 multiplied by 60+9 multiplied by 30+3 multiplied by 60cm from inside to outside. The working platform is 11 multiplied by 1.5 m.

Bottom die: the No. 0 block bottom die adopts square wood and bamboo plywood.

In one embodiment of the invention, the procedure of assembling the hanging basket is as follows:

leveling beam surface

And after the No. 0 block is constructed, leveling the top surface of the beam body below the walking beam pad beam by using medium coarse sand.

② laying the bolster

The pad beams are uniformly distributed on the beam body according to the distance of 500 mm.

Fourthly, mounting the walking beam

A head section walking track is arranged from the transverse central line of the 0# block to the 1# and 1' # sections by 1m, and the track configuration length is 4m +4 m. Before installation, the top surface of the walking beam is leveled, the central line of the walking beam is accurately determined, the walking track beam is placed on the pad beam, and then the anchoring bolt is installed to lock the walking beam.

Front and rear supports for mounting hanging basket

The rear support penetrates through the rear end of the walking beam, and the front support penetrates through the front end of the walking beam. Because No. 1 piece adopts disjunctor to hang the basket, left side and right side sharing back support, preceding, back support need accurate positioning.

Sixthly, installing the main truss of the hanging basket

The main framework of the hanging basket is divided into six parts which are respectively: the device comprises an upper flat rod, a lower flat rod, a rear pull rod, a front inclined rod, a vertical rod and a bidirectional parallel connection.

The concrete assembling sequence is as follows: firstly, a lower flat rod is hoisted, the lower flat rods of the hanging baskets on the left side and the right side are installed in place at the same time, then a vertical rod is installed, temporary supports (the left side and the right side are connected and fixed with embedded steel bars of a beam body by adopting chain blocks) are arranged, and then a front pull rod and a rear pull rod are installed and locked with the lower flat rod and the vertical rod. And after the rear pull rods on the left side and the right side are locked, the rear pull rods are firstly installed and then anchored, and double nuts are arranged for anchoring after the rear anchor pull rods are parallelly connected and penetrated. The upper flat rod and the front inclined rod are adjusted in angle in the site, the section steel is temporarily locked and then assembled by integral hoisting of a truck crane, and finally the bidirectional parallel connection is installed.

Seventhly, a hanging basket hanging system and a bottom die are arranged

After the basket hanging main truss is installed, the basket hanging rear anchor suspension rod and the rear anchor parallel connection are immediately installed, prestress is applied to the basket hanging rear anchor suspension rod through a jack for anchoring, and then the basket hanging template suspension rod is installed.

Then a bottom mould of the cradle is installed. The specific installation method comprises the following steps: and hoisting the upper beam to the corresponding position of the upper beam before the cradle in the field, hoisting the suspender to penetrate into the hole and setting double nuts for anchoring. When the suspenders are installed, the suspenders are ensured to be vertical, bending is avoided, and all anchoring suspenders must be anchored by double nuts.

Assemble die block platform at pier bottom includes: the bottom die comprises a front lower cross beam, a rear lower cross beam, a bottom die longitudinal beam (the bottom longitudinal beam is connected with the front lower cross beam and the rear lower cross beam through bolts), a front suspender frame beam, a rear suspender frame beam and a bottom die panel. A35T wheel type truck crane and a 70T wheel type truck crane are adopted, four hoisting points of 2 steel wire ropes are adopted to integrally hoist the bottom die platform to be positioned at the bottom of the No. 1 block, and the hoisting points are arranged on the front lower cross beam and the rear lower cross beam. And the rear lower cross beam is suspended on the poured beam section bottom plate concrete by using the suspended suspension rod, and the front lower cross beam is suspended on the front upper cross beam of the hanging basket.

Installing side mould and slideway beam

When the outer die is assembled on the hanging basket, the installation work of the side die slideway can be carried out. The installation process is as follows: firstly, determining the front-back position relation between a cradle side mold back frame and an outer slideway beam, then penetrating the outer slideway beam into the outer mold back frame by using an automobile crane, and fixing; the rear end of the sliding beam is penetrated with a fixed and movable sliding frame hanger, the sliding beam is integrally hoisted by using an automobile crane, the front end of the sliding beam is anchored on a front sling which is placed in advance, a finish rolling deformed steel bar hanger is placed at the rear end of the sliding beam through a flange plate embedded sling hole, and the fixed hanger is anchored on the hanger by using double nuts.

Ninthly adjusting the posture of the cradle

And lifting the rear end suspender after the side mold is installed in place to ensure that the bottom mold and the side mold are tightly attached to the poured section concrete, and applying prestress by using a jack for anchoring. And adjusting the front and rear positions of the cradle according to the measurement control points, and simultaneously moving the bottom side die to accurately position the bottom side die. And locking the rear anchor point of the bottom side die.

The invention has the beneficial effects that:

1. the process utilizes the bearing platform and the strip foundation, and the spiral steel pipe support is built on the embedded steel plate on the top surface of the concrete, so that the occupation of the site space can be effectively reduced, the construction period can be shortened, the engineering requirement can be met, and the cost can be reduced to the lowest.

2. The adopted hanging basket has the advantages of large operation space, convenience in installation, simplicity in operation, strong applicability, capability of operating all day long, simple structure of the main truss, definite stress, no bending phenomenon due to the fact that all members are tension and compression rod members and nodes are stressed, and large bearing capacity. The construction working face is wide, the main bearing structure and the bottom basket are in place at one time when the hanging basket moves, and the moving time is short.

3. The rotary spherical hinge mainly comprises a lower rotary table, a spherical hinge, an upper rotary table, a rotary traction system, a boosting system, an axis fine adjustment system and the like. The rotating system adopts a steel ball hinge and is divided into an upper piece and a lower piece. The lower panel of the upper spherical hinge is a convex surface and is connected with the reinforced concrete of the upper turntable into a whole through a ribbed plate of the upper spherical hinge; the lower spherical hinge is a concave surface and is embedded and fixed on the supporting framework, and the sliding sheet embedding grooves are arranged on the surface. The upper spherical hinge panel and the lower spherical hinge panel are spherical surfaces formed by pressing steel plates, and the back parts of the upper spherical hinge panel and the lower spherical hinge panel are provided with longitudinal ribs and transverse ribs, so that the upper spherical hinge panel and the lower spherical hinge panel are prevented from being deformed in the processing and transporting processes, and the spherical hinge is convenient to position. Strengthening the connection with the surrounding concrete. The central part of the spherical hinge is provided with a pin shaft sleeve, and a positioning pin shaft is arranged in the spherical hinge, so that the spherical hinge is convenient to position and has a strong shearing-resistant effect.

4. The overall stability of the 0# block support is good, the construction safety risk is low, and the operation space is large. The building time is short, the investment of section steel materials is more, the cost of installation machinery is low, and the construction cost is reduced. The whole stability of the side span support is good, welding operation is not needed when the steel pipe is lengthened, high-strength bolts are adopted for connection, the construction process is controllable, and the construction safety risk is low. The structure has the advantages of convenience in erection, good turnover, less investment of section steel materials, large investment of the disc buckling frame, low installation mechanical cost and good economic benefit compared with a steel pipe support, and the disc buckling frame can adopt a leasing mode.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is an overall flow chart of a swivel beam structure construction process provided by an embodiment of the invention;

FIG. 2 is a flow chart of the installation of the lower ball joint according to the embodiment of the present invention;

FIG. 3 is a flow chart of the installation of the upper spherical hinge according to the embodiment of the present invention;

fig. 4 is a flow chart of the assembly of the hanging basket according to the embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.

Examples

Referring to fig. 1, the present invention provides a technical solution: the swivel beam structure construction process comprises the following steps

in some specific embodiments, the step of installing the lower spherical hinge is: 1. lower spherical hinge skeleton installation, accurate unwrapping wire: and (4) emitting a central point and four corner points on the lower bearing table surface by using a total station. Hoisting and aligning: and hoisting the lower spherical hinge framework to a design position, centering the stay wires, and manually adjusting and aligning four angular points. Elevation control: and measuring the elevations of the four corners, and adjusting the bottom of the framework to ensure the level of the upper plane. Welding and fixing: and after the framework is positioned, the embedded steel bars and the framework are firmly welded. 2. The installation of the lower spherical hinge and the field assembly of the lower spherical hinge mainly comprise the connection of the lower spherical hinge and a framework, the connection of the lower spherical hinge and the framework is realized by bolts, and other components are welded and assembled in a factory. Accurate positioning and adjustment: the lower spherical hinge is suspended by using the framework and the adjusting bolt, the central position is adjusted, and then the elevation is adjusted by means of vertical rotation of the fixed adjusting screw rod. Fixing: after the accurate positioning and adjustment are completed, the center, the elevation and the flatness of the lower spherical hinge are rechecked. Adopt Tianbao electronic level to carry out multiple spot retest, screw up fixedly between adjusting bolt and the crossbeam after the inspection is qualified, weld the reinforcing bar between skeleton and the lower ball pivot and strengthen fixedly. And determining the center position of the lower spherical hinge by using a stay wire, and accurately measuring by using a come card total station to ensure that the center position of the lower spherical hinge is coincident with the design position. The sliding staff is erected on the edge of the lower spherical hinge, the bolt is adjusted according to the reading,

the lower panel of the upper spherical hinge is a convex surface and is connected with the reinforced concrete of the upper turntable into a whole through a ribbed plate of the upper spherical hinge; the lower spherical hinge is a concave surface and is embedded and fixed on the supporting framework, and the sliding sheet embedding grooves are arranged on the surface. The upper spherical hinge panel and the lower spherical hinge panel are spherical surfaces formed by pressing steel plates with the thickness of 35mm, and the back parts of the upper spherical hinge panel and the lower spherical hinge panel are provided with longitudinal ribs and transverse ribs, so that the upper spherical hinge panel and the lower spherical hinge panel are prevented from being deformed in the processing and transportation processes, and the spherical hinge is convenient to position. Strengthening the connection with the surrounding concrete. The center of the spherical hinge is provided with a pin shaft sleeve, and a positioning pin shaft is arranged in the spherical hinge sleeve and used for positioning and shearing resistance of the spherical hinge. And adjusting the elevation to a designed elevation, wherein the relative height difference of each plane of the lower spherical hinge is not more than 0.5 mm.

The rotating body structure consists of a lower rotating disc, a spherical hinge, an upper rotating disc, a rotating body traction system and a boosting system. The lower rotary table is an important support structure for the rotation, and is provided with a lower spherical hinge of a rotation system, an annular slide way of a supporting foot, a counter-force seat of a rotation traction system, a boosting system, an axis fine adjustment system and the like. The lower turntable utilizes a lower bearing platform, the longitudinal dimension is 11.1m, the transverse dimension is 16.5m, and a post-pouring part with the diameter of 9.4m and the height of 1.0m is reserved at the top of the bearing platform; local pressure-bearing reinforcing mesh and connecting reinforcing steel bars are arranged. The installation of the lower spherical hinge and the slideway requires high precision, and a positioning framework is embedded in advance and is accurately leveled through an adjusting bolt. And the relative height difference of each plane of the slide way and the lower spherical hinge plane is not more than 0.5mm, and C50 concrete is poured after the adjustment is finished. After the rotation is finished, the rotating body is connected with the upper rotating disc through sealing hinge concrete to form a bearing platform together. The steel ball hinge is 70000kN type, divided into an upper piece and a lower piece, the radius of a sphere R8008mm, the diameter of a spherical plane phi 3400mm, and is made of a complete set of products of a manufacturer. The spherical hinge is the core of a rotating system and is a key structure for rotating construction, the manufacturing and mounting precision requirement is high, and elaborate manufacturing and mounting are needed. The upper rotating disc is a part for connecting the spherical hinge, the supporting leg and the upper rotating disc and is a part for directly applying the traction force of the rotating body. The upper rotary disc supporting leg is a safety leg for keeping the structure of the rotating body stable when the rotating body rotates. From keeping the stability of rotation structure and convenient construction, arrange 6 pairs of spike around last carousel symmetry. A slide way with the width of 0.9m is arranged below the supporting foot (namely the top surface of the lower disc), the central radius of the slide way is 3.9m, and the safety supporting foot can slide in the slide way during the rotation so as to keep the stable structure of the rotation. In order to ensure the smooth implementation of the rotation, the whole slide way surface is required to be on a horizontal plane, and the relative height difference is not more than 0.5 mm.

The supporting feet are in a double-cylinder shape, and a steel running plate with the thickness of 20mm is arranged below the supporting feet. The double columns are two steel pipes with the diameter of 720mm multiplied by 10mm, and C50 micro-expansion concrete is poured into the steel pipes of the supporting legs. The arm brace is processed in the mill, after lower carousel concrete placement, when going up the ball pivot installation and taking one's place, install the arm brace promptly to 20mm steel sheet (as the clearance of turning structure and slide) are cushioned under the arm brace running plate. And (5) after the construction of the upper rotary disc is finished, the backing plate is drawn off. Before rotating, the supporting legs contacting the lower slideway and the lower surface of the supporting legs are paved with a 3mm tetrafluoro sliding plate so as to reduce the friction force during rotation. The rotary traction system mainly comprises a traction counter-force seat, a traction cable and a traction power system. The traction counter-force seat is designed to be C50 reinforced concrete, the traction cable is 12 bundles of phi 15.2 prestressed steel strands, and the swivel power system is formed by connecting 2 sets of hydraulic jacks, 2 hydraulic pump stations and 1 master control console through high-pressure oil pipes and cables. The boosting system mainly comprises a boosting counterforce seat and a boosting power system. The boosting counterforce seat is designed to be C50 reinforced concrete, and the boosting force system is 3 sets of YCW200 hydraulic jacks.

In some specific embodiments, the slide mounts: the construction of the slideway is the same as that of the lower spherical hinge framework. The slideway is assembled in sections on site and is adjusted and fixed by an adjusting bolt. The support leg can slide in the slideway during the rotation so as to keep the stable structure of the rotation. The top surface of the slideway is required to be 1cm higher than the top surface of the concrete of the lower turntable, and the whole slideway surface is on the same horizontal plane. 1. The slide assembly, when the mill was makeed, the ball pivot slide of turning divides into two parts, and one of them part is the slide skeleton, and a part is annular slide steel sheet, and wherein the annular angle steel of slide skeleton upper and lower part is transported to the scene in piecemeal after the producer shaping. In order to ensure the smoothness of the top surface of the annular steel plate, the slideway steel plate faces downwards before installation, the framework is welded on the annular angle steel, the supporting legs of each framework can be uniformly distributed as far as possible during welding, the supporting legs are firstly spot-welded on the annular angle steel, then the outer side of the inclined angle steel is welded, full welding is carried out after completion, and measures are taken during welding to avoid overlarge deformation. Finding relatively flat ground, placing the annular steel plate on the ground upside down, welding the framework behind to ensure the relative position deviation 2 and the splicing of the slideway, turning over the one-fourth or one-eighth slideway with the welded framework, and splicing the round slideway with the steel plate facing upwards. Guarantee that the slide steel sheet is in same horizontal plane during the circle of piecing together, spot welding slide steel sheet, the steel sheet that partially sticks up or recessed is adjusted to the part after the whole circle spot welding is accomplished, guarantees that all slide steel sheets are in same horizontal plane and the seam crossing is level and smooth not have the V-arrangement ripples. 3. Welding the slideway steel plates, namely forming wedge-shaped grooves when the slideway steel plates are processed in a slideway steel plate factory, enabling two adjacent steel plates to be on the same horizontal plane, jacking the lower slideway steel plate by using a jack when necessary during welding, enabling the top surfaces of welding seams to be slightly higher than the surfaces of the steel plates, and polishing by using a polishing machine after welding is finished to ensure that the surfaces are smooth; the wedge groove welding adopts intermittent welding, and one welding position is welded every 1 cm. 4. And (5) hoisting the slide way, and hoisting the whole slide way in place at one time. When the slideway is hoisted, 2 ropes which are vertical to each other can be pulled, and the center of the slideway is determined through the ropes, so that the center of the slideway is coincided with the rotation center of the spherical hinge. And after hoisting, fine adjustment is carried out, then the slideway framework is fixed, and the side embedded anchor bars are welded with the angle steel of the slideway framework. 5. The adjustment of slide height carries out elevation measurement to the slide top surface by survey crew, erects the electronic level outside the slide, uses the level to carry out the reading to slide each point height, makes slide surface height reach the design elevation according to the height adjusting nut, and each plane relative altitude difference of slide is not more than 0.5 mm.

In some specific embodiments, the lower turntable concrete foundation is designed to be circular, and the template is a wood plate. Binding reinforcing steel bars, installing embedded parts, and performing secondary pouring of lower turntable concrete, and a traction counter-force seat, a boosting counter-force seat and a limiting device. I32a I-shaped steel is embedded in the concrete of the lower bearing platform, the upper bearing platform and the lower bearing platform are locked and connected after the concrete of the upper bearing platform is poured, and the locking is released after the upper bearing platform is cut off in front of a rotating body. The lower spherical hinge is provided with a concrete pouring vibrating hole and an exhaust hole to ensure that concrete is compact without holes, and the pouring sequence of the concrete is carried out from the center to the periphery. And building a working platform before pouring the concrete. Personnel operate on the working platform, and the condition that the plane position and the elevation of the personnel are influenced by treading the lower spherical hinge and the slide way in the concrete construction process is avoided. And (4) strictly controlling the concrete pouring and reinforcing the concrete curing. After the concrete is solidified, the inspection is carried out by adopting a method of middle knocking edge observation, so that the gap generated by concrete shrinkage is avoided, and the gap part is treated by adopting a method of drilling and grouting. In order to prevent water or sundries from entering a gap between the upper spherical hinge and the lower spherical hinge in the later construction process, the top surface of the concrete of the lower turntable is 1cm lower than that of the lower spherical hinge during construction.

In some specific embodiments, the step of installing the upper spherical hinge is as follows: 1. cleaning the spherical surfaces of the upper spherical hinge and the lower spherical hinge. 2. And (3) placing butter into the central pin shaft sleeve, placing the central pin shaft into the sleeve, and adjusting the verticality and the peripheral gap. 3. And the lower spherical hinge concave spherical surface is provided with sliding pieces from inside to outside according to the serial numbers, and all the sliding pieces are positioned on the same spherical surface. And after the detection is qualified, coating butter between the sliding pieces on the spherical surface to ensure that the butter is uniformly filled in the space between the sliding pieces and is slightly higher than the top surfaces of the sliding pieces. 4. And hoisting the upper spherical hinge in place, and sleeving the upper spherical hinge into the central pin shaft. The position of the upper spherical hinge is finely adjusted by a chain block to be horizontal and vertical to the gap of the outer ring of the lower spherical hinge. The clearance between the pin shaft and the upper and lower spherical hinges and the smoothness between the pin shaft and the steel pipe channel are ensured. 5. The periphery is protected after the spherical hinges are installed, the upper spherical hinge and the lower spherical hinge are tightly wound and wrapped by adhesive tapes, and impurities are prevented from entering the friction surface. 6. And finally, hoisting the rest of the plane steel plates and the upper spherical hinge steel protective cylinder, adding butter into the sleeve, then putting the sleeve into the pin shaft and rotating, overflowing the butter, and then coating the butter on the pin shaft. A layer of butter is uniformly touched on the surface of the sliding sheet, and the butter is slightly higher than the sliding sheet. Hanging the upper spherical hinge on the lower spherical hinge, and overlapping the centers of the upper spherical hinge and the lower spherical hinge; the upper spherical hinge is rotated to overflow redundant grease, the sliding sheet is well attached to the upper spherical hinge, and the gap between the upper spherical hinge and the lower spherical hinge is closed in time. 7. The spherical mandrel of the upper spherical hinge and the spherical mandrel of the lower spherical hinge coincide with the rotation center of the spherical hinge, the central axis of the welded steel pipe of the upper spherical hinge and the lower spherical hinge coincides with the rotation center axis, and the error is not more than 1 mm.

In some specific embodiments, the upper bearing platform construction comprises supporting feet and sand box installation, and the steel supporting feet are safety devices for supporting the stability of the rotating body structure. Go up the carousel and set up the spike and transport into the building site after factory integrated manufacturing, for two columniform, set up 20mm thick steel deck down. The double columns are two steel pipes with the diameter of 720mm multiplied by 10mm, and C50 micro-expansion concrete is poured into the steel pipes of the supporting legs. And when the upper spherical hinge is installed in place after the lower disc concrete is poured, the supporting leg is installed, and the steel wedge is padded under the supporting leg walking plate to ensure that the gap between the supporting leg and the slideway is not more than 20mm and serve as the gap between the swivel structure and the slideway. The backing plate is taken out in front of the rotating body and a 3mm stainless steel plate is laid in the slideway. 12 sand boxes are arranged on the slide way and used for supporting the weight of the upper rotating disc and the upper structure, and meanwhile, the function of stabilizing the upper rotating disc is achieved, the sand boxes are drawn out before the rotating body, and 3mm polytetrafluoroethylene sheets are paved in the slide way. The sand box is pre-pressed by a jack before being used, the pre-pressing force is 1.2 times of the bearing capacity, the pre-pressing equipment consists of a top beam, a bottom beam and finish-rolled deformed steel bars, the sand box is arranged on the bottom beam, the jack is arranged on the sand box, the jack props against the top beam, the finish-rolled deformed steel bars provide tensile resistance, and the jack applies 1.2 times of the bearing capacity of the sand box to pre-press. The continuous beam adopts 70000KN spherical hinges, and the rotating system supporting part adopts 6 pairs of supporting feet and 6 sand boxes to form a whole supporting system by the support of the spherical hinge rotating shaft. 70000KN ÷ 12=5833KN, and considering that the maximum supporting force of the supporting leg of the ball hinge is 2000KN, the maximum supporting force of the sand box is equivalent to 2000KN of the maximum supporting force of the supporting leg. And (4) the sand box prepressing tonnage =2000KN multiplied by 1.2=2400 KN.

The upper bearing platform is of a circular platform structure, the bottom die is made of a bamboo plywood with the thickness of 18mm, the braces are reinforced by 10 multiplied by 10cm square timber combined with fastener type steel pipes, the side dies are shaped steel dies, the positions of the pier body embedded ribs are required to be noticed during reinforcement of the upper bearing platform, the steel bars are used for supporting and oppositely pulling after the reinforcement of the pier body embedded ribs is finished, and the accuracy of the positions in the concrete pouring process is guaranteed. The concrete is intensively mixed by adopting a mixing station, and the concrete is transported to the site for pouring by a tank truck. And after the concrete pouring is finished, covering, watering and curing in time.

In some specific embodiments, after the bottom layer steel bars are installed, two traction ropes are installed and positioned, the traction ropes adopt 12 phi s15.24 steel strands, and in order to ensure that the traction ropes do not interfere with each other when rotating, the traction ropes adopt 1 forward rotation and 1 backward rotation. The embedded ends of the traction cables in the concrete are anchored by adopting OVM 15-12P-type anchors, the positioning steel plates fixed on the bottom layer steel bars are utilized to determine the plane position and the height of the steel strands, the anchoring ends of the same pair of traction cables are positioned on the same straight line and are symmetrical with the circle center of the rotary table, the embedded height and the traction direction of each cable are consistent, the length of each cable embedded into the rotary table is 3.2m, when the external length is 14.64m, the traction cable supporting steel bars are embedded, and the outer leakage parts of the traction cables are wound around the rotary table template in a circle and are placed on the embedded bars without mutual interference. The steel strand wires are embedded in the upper rotary disc on the rotary body for attention protection, operators are required to pay strict attention when the upper bearing platform is disassembled, a specially-assigned person stares and controls, electric welding and oxygen acetylene cutting are strictly forbidden to damage the steel strand wires, after the template is disassembled, the exposed parts of the traction cables are sequentially and circularly wound around the rotary disc, and the rotary disc is fixed by reserved steel bars. After winding, coating butter on the exposed part to prevent rusting, wrapping the plastic corrugated pipe tightly with plastic cloth, and making a protective identification label.

in some specific embodiments, the 0# block construction requires the 0# block bracket construction, and the 0# block bracket adopts a spiral steel pipe type steel bracket. From down to up do in proper order: a bearing platform foundation, a phi 630mm steel pipe upright post, 2I45a I-steel (cross beams), an I25a I-steel triangular truss and a square wood bamboo plywood bottom die. The method comprises the following steps: the bearing platform is used as the foundation of the whole bracket system. Secondly, steel pipe column: the upright columns are spiral steel pipes with the diameter phi of 630mm and the wall thickness of 10mm, 2 rows of the spiral steel pipes are respectively arranged along two sides of the central line of the beam body, 3 upright columns are arranged in each row, and the distance between the centers of the upright columns in each row along the bridge direction is 3.0 m. The transverse bridge is arranged in 3 rows by taking the center line of the pier as the center, and the distance is 3.3 m. ③ the beam: the steel pipe is formed by welding 2 double-spliced I45a I-shaped steels and is placed on a bearing plate (80 multiplied by 1.4 cm) at the top of the spiral steel pipe upright post. Fourthly, triangular truss: the longitudinal beams are formed by combining I25a I-shaped steel and I25a I-shaped steel, and 12 longitudinal beams are arranged on one side. The arrangement form is as follows: 10 groups of triangular trusses are installed in the single-side web plate and the enlarged block area, 3 groups of triangular trusses are paved on the bottom plate, 4I 25a I-shaped steel beams are arranged in the single-side flange plate area in a through mode, and the distance is 3 multiplied by 60+9 multiplied by 30+6 multiplied by 60+9 multiplied by 30+3 multiplied by 60cm from the inside to the inside. The working platform is 11 multiplied by 1.5 m. Bottom die: because 0# piece bottom plate department has the support built-in fitting, prevents falling roof beam dog built-in fitting and mound roof beam consolidation reinforcing bar, mound top department template structure size is complicated, has enough to meet the need the utilization ratio not high, so 0# piece die block adopts square timber and bamboo plywood. And then carrying out 0# block bracket installation, namely embedding a 80 multiplied by 1.4cm connecting steel plate at each upright post of the bearing platform according to the scheme requirement during the construction of the upper bearing platform and the lower bearing platform, arranging 8 anchoring steel bars with the diameter of HRB400 phi 25mm at the lower part of each steel plate, and setting the anchoring depth of the steel bars to be 50 cm. The steel-pipe pile is effectively welded with the pre-buried steel plate of the bearing platform, and 8 reinforcing steel plates are arranged at the column base. After the stand column of the support is processed on the ground, the stand column is hoisted in place by using an automobile crane. When the steel pipe is hoisted, the total station is adopted to carry out trimming observation between 90 degrees, and meanwhile, the hammer ball is assisted to control the verticality of the steel pipe, so that the verticality of the steel pipe is ensured to be less than 1 percent. Secondly, the verticality of the spiral steel pipe is adjusted in time after the spiral steel pipe is hoisted, and [20 channel steel cross braces and parallel links ] are welded at the positions corresponding to the cross braces and the parallel links. The parallel connection and the bridging are arranged in two groups, the height of the first group of parallel connection is 2.0m below the top end of the pier stud side stand column, the distance between the second group of parallel connection and the first group of upper and lower parallel connection is 7.5m, the welding between each group of parallel connection and the embedded steel plate of the pier body is firm, and one group of parallel connection is arranged between adjacent connecting rods. Thirdly, after the spiral steel pipe is installed, the top surface elevation of the spiral steel pipe is adjusted, a steel plate bearing the pressure of 80 multiplied by 1.4cm is welded on the steel pipe upright post, double I-shaped steel I45a is welded and installed on the steel plate to serve as a cross beam, the cross beam of the I-shaped steel is firmly welded with the steel plate, and the node of the cross beam is arranged. As the maximum length of a single spiral steel pipe upright is 23.55m, the steel pipe upright needs to be lengthened in the construction process. The lengthening of the spiral steel pipe upright post is completed on the ground, when the steel pipe is lengthened, the lengthened steel pipe is ensured to be horizontal and coaxial, the interface surface is welded by adopting a groove, and the wall of the steel pipe upright post with the same diameter is used for manufacturing a wrapping plate with the length and the width of 20 cm. And 4 wrapping plates are welded at equal intervals at each joint of the steel pipe upright. And finally, pre-pressing the bracket, considering the elastic deformation of the bracket, the connecting gap of a component and other factors, preventing the beam body from cracking due to the sinking of the bracket when the concrete beam body is poured, reducing the deformation of the upper structure of the bracket, and after the erection of a bracket platform is completed and the acceptance is qualified, performing a pre-pressing test on the bracket to eliminate the inelastic deformation of the bracket, measuring the relation between the elastic deformation and the load, providing reliable data for the reserved height of a bottom die of the beam body, and simultaneously, the pre-pressing of the bracket is the most effective method for testing the strength, the rigidity and the stability of the bracket and ensuring the safety. Observation points are arranged, and the beam body No. 0 block is cast by adopting the support, so that the support is pre-pressed after the bottom die of the No. 0 block is installed, the pre-pressed part is the beam body of the cantilever part, and the beam body support at the pier top part is not pre-pressed. And loading the part of the beam body by the weight which is 1.2 times of the weight of the beam body and is not lower than 1.1 times of the maximum construction load borne by the bracket corresponding to the weight of the suspended pier top of the No. 0 block. Through actual prepressing, the deformation condition of the support is really mastered, 6 rows of observation point positions are specially arranged on the bottom die, and 4 positions in each row are used for observing the deformation condition of the bottom plate template; 7 rows of flange plates are arranged, and 2 positions of each row are used for observing the deformation condition of the longitudinal beam of the flange plate bracket; and (4) observing the top and the bottom of the steel pipe upright pile to master the compression deformation value of the steel pipe. Secondly, selecting a prepressing material, wherein the beam body prepressing material adopts self-made concrete precast blocks, the size of a single prepressing block is 2 multiplied by 0.9m, and the weight of the single prepressing block is 4.05 t. The pre-pressing block is newer, the breakage is less, the actual weight is consistent with the theoretical weight, and the error is less than +/-1%. And hoisting the precast block to the support by adopting an automobile crane, and stacking the precast block according to requirements. The maximum load of the prepressing is 1.2 times of the weight of the corresponding segment, the total prepressing load of the 0# block (except the pier top part) = the beam weight multiplied by 1.2= (653.1-258.9) × 1.2=473.04t, the concrete precast block is used as the weight-pressing load, because the bracket of the 0# block bears the weight of the concrete of the 0# block suspended outside the pier, the load distribution conditions on different unit cross sections are calculated before the prepressing, the loads at the web plate and the transverse clapboard are concentrated, and the precast block is stacked according to the load distribution conditions of the unit cross sections when stacked, so that the concrete load can be really simulated, and the aim of the prepressing is achieved. Thirdly, loading and unloading, wherein pre-pressing loading is applied step by step for three times according to 60%, 100% and 120% of total construction load, the principle of 'two ends synchronous and bilateral symmetry' is followed in the loading process, and after each stage of loading is finished and waiting for 1h, deformation observation of the support is carried out, and data recording is well carried out; and unloading can be carried out after the support is pressed to 120% and observed to be stable, the deformation of the support is calculated, so that the elastic deformation and the inelastic deformation of the support are determined, and the elastic deformation of the support is used as a template pre-polishing height value. The loading is gradually applied for three times according to 60%, 100% and 120% of the total construction load: the one-side prepressing weight is as follows: 0 → 236.52t → 394.2t → 473.04t (unloading when the average value of the last two settlement amount observations is not more than 2 mm) → 294.2t → 236.52t → 0 t. According to technical code TB10110-2011 of cast-in-place construction of a railway concrete beam support method, after all pre-pressing loads are applied, monitoring and recording displacement of each monitoring point at intervals of 6h, and when the difference between the average values of the final two settlement observation times is not more than 2mm, stopping pre-pressing and unloading the pre-pressing loads. Some abnormal phenomena (such as abnormal sound and sudden increase of deformation value) appear in the preloading process, the loading is stopped immediately and processed or reported in time, and the loading is forbidden to continue until the condition is not clearly checked. When the pre-pressing load is unloaded, the pre-pressing load is loaded, the pre-pressing load is gradually unloaded in a grading mode according to the times of loading, settlement observation is carried out in the unloading process, and the grading unloading observation point is the same as the settlement observation point in the loading process. And drawing deformation curves of the loading and unloading processes of the measurement point positions according to the loading and unloading measured data, and calculating the elastic deformation of the support. After pre-pressing, the support basically eliminates plastic deformation of the ground base under the action of pre-pressing load and the clearance and inelastic deformation of each vertical rod piece of the support. The springback after the preloading and unloading is the sinking amount of the continuous beam in the concrete pouring process, so the elevation value of the top of the bracket is finally adjusted as follows: design elevation value + design pre-arching value + pre-pressing elastic deformation.

In some specific embodiments, the procedure for assembling the hanging basket is as follows:

leveling beam surface

② laying the bolster

Mounting walking beam

Front and rear supports for mounting hanging basket

Sixthly, installing the main truss of the hanging basket

Seventhly, a hanging system for mounting a hanging basket and a bottom die

After the hanging basket main truss is installed, the hanging basket rear anchor suspension rod and the rear anchor parallel connection are immediately installed, prestress is applied to the hanging basket rear anchor suspension rod through a jack for anchoring, and then the hanging basket template suspension rod is installed.

Assemble die block platform at pier bottom includes: the bottom die comprises a front lower cross beam, a rear lower cross beam, a bottom die longitudinal beam (the bottom longitudinal beam is connected with the front lower cross beam and the rear lower cross beam through bolts), a front suspender frame beam, a rear suspender frame beam and a bottom die panel. A35T wheel type truck crane and a 70T wheel type truck crane are adopted, four hoisting points of 2 steel wire ropes are adopted to integrally hoist the bottom die platform to be positioned at the bottom of the No. 1 block, and the hoisting points are arranged on the front lower cross beam and the rear lower cross beam. And the rear lower cross beam is suspended on the poured beam section bottom plate concrete by using the suspended suspension rod, and the front lower cross beam is suspended on the front upper cross beam of the suspension basket.

Installing side mould and slideway beam

Ninthly adjusting the posture of the cradle

specifically, in the hoisting scheme, the maximum tensile force actually borne by the steel wire rope is as follows: f =33KN was taken for a weight of the member of 2t × 10 × 1.65=33 KN (coefficient of take-off force of 1.65). The allowable tension of the steel wire rope is as follows: taking a safety coefficient K =6 and a non-uniformity coefficient phi =0.82, and obtaining the minimum breaking tension of the steel wire rope required by F = P multiplied by phi/K as follows: pmin = F × K/phi =33 × 6/0.82=40.24KN, and the breaking tension P =211.5KN > Pmin of the steel wire rope of 6 × 19-20-1400 can be obtained by looking up a table. Therefore, the steel wire rope with the model number of 6 multiplied by 19-20-1400 is selected. Adopt 2 tons of snap rings, the round pin shaft hole footpath is phi 24mm and penetrates steel mould stiffening plate phi 30mm aloft, and every wire rope adopts 1 totally to adopt 2 snap rings to be fixed in the stiffening plate outermost end hole. The sliding rope adopts a coir rope with the diameter of 20mm, and the coir rope must have a qualification certificate and is a newly purchased or semi-new rope. Two sliding ropes are arranged at the lower end of each hoisting section, and the sliding ropes must be firmly bound.

Specifically, the concrete compaction measure of the embedded section of the steel shell is as follows: the particle size of the coarse aggregate is strictly controlled, and the particle size of the coarse aggregate is ensured to be within the range of 5-20 mm. The mid-span 5# piece needs pre-buried steel casing, and in order to ensure that the pre-buried section concrete of steel casing is closely knit, need to be in close contact with hanging basket template during the installation. And when the concrete is poured, the vibration of the concrete at the embedded section is enhanced, the knocking check is carried out simultaneously, and whether the concrete is dense or not is judged through sound. And the vibration is timely enhanced at the places which are not compact, so that the compactness is ensured.

Specifically, the bridge deck auxiliary project construction process flow is as follows: before turning, the bridge floor is cleaned → 0# -10 # block shielding plate is installed → 0# -10 # block vertical wall A is manufactured → 0# -10 # block railing is installed → 0# -10 # block protective wall and vertical wall B are manufactured. After the turning and the closure, the curtain board is installed in the range of 2m of the closure section → the vertical wall A is manufactured → the protective wall and the vertical wall B are manufactured → the railing is installed in the range of 2m of the closure section → the full bridge waterproof layer is constructed → the expansion joint and the anti-falling beam are installed → the concrete cover plate is installed.

And (3) construction of a protective wall and a vertical wall, wherein reinforcing steel bars are embedded at corresponding positions of the protective wall and the vertical wall during construction of the continuous beam, so that the protective wall, the vertical wall and the beam body are connected into a whole, and the stability of the protective wall and the vertical wall on a bridge floor is ensured.

And (2) constructing the protective wall, 1, checking the bridge deck elevation at the corresponding position of the protective wall, and adopting mortar with the same grade for repairing when the bridge deck position is lower than the design elevation. And when the height is higher than the design height, chiseling the excess concrete. 2. According to the size of a design drawing of the protective wall, the central line of the line is penetrated in a segmented mode, the positions of the inner side and the outer side of the wall body of the protective wall are determined according to the central lines of the two ends of the box girder, and the ink lines are flicked to serve as the basis for formwork erecting. 3. And before the rotating body, the standard segment blocks of the integral steel template are formed by one-step pouring.

The construction of the vertical wall, the pre-buried steel bars are trimmed before the steel bars of the vertical wall are bound, the steel bars of the vertical wall are processed and then transported to the site for binding, the templates adopt 3015 common steel templates, the site assembly is carried out, the special parts adopt wood templates, the concrete is intensively mixed by a mixing station, a wheel crane vertically hoists an upper bridge, the site pouring is carried out, and the vibration is carried out by adopting an insertion type vibrating rod. Of particular note are: the vertical wall A must be poured after the cover plate is installed in place. And the root of the vertical wall B is provided with water passing holes of 100mm multiplied by 150mm (length multiplied by height) corresponding to the positions of the water passing holes of the protective wall. And thirdly, reserving redundant length requirements for communication and signal cables, moving the vertical wall B outwards as required, and adjusting the width of the cable groove. And fourthly, setting 10mm broken joints every 2m on the vertical wall, so that when the formwork is assembled, the broken joints can be filled with sparse glue and plates with the thickness of 10mm, and after the formwork is disassembled, sawing off the glue and plates and filling mortar.

In some specific embodiments, the inside range of the bridge deck protective wall is sprayed with the polymer modified asphalt treating agent, the polymer modified asphalt waterproof coiled material is laid, and the C40 fiber concrete protective layer is covered on the high polymer modified asphalt waterproof coiled material, and the total thickness is 60 mm. And (3) brushing polyurethane waterproof paint in the cable groove on the outer side of the protective wall, and covering a C40 fiber concrete protective layer on the waterproof paint, wherein the total thickness is 40 mm. A waterproof coiled material additional layer is pasted with waterproof paint at the root of the protective wall, the thickness of the additional layer coiled material is 0.5mm, the width of the additional layer coiled material is 350mm, 300mm is horizontally paved, 50mm is vertically folded, and then the waterproof coiled material and the protective layer are paved. Firstly, sticking a coiled material additional layer on the opening part of the water discharge pipe by using polyurethane coating; the additional layer coiled material is 0.5mm in thickness, 400X 350mm in length and width, perforated in the middle, cut into a plurality of triangles and tightly attached to the lower inner wall of the water discharge pipe opening. And the edges of the waterproof rolls and the joints of the concrete of the protective layer and the beam body are sealed by polyurethane coating, and the height of the sealed edges is not less than 80 mm. The lap joint of the waterproof coiled material is sealed by polyurethane coating.

Specifically, the curtain board construction adopts centralized prefabrication and field installation. The model of sunshade is made to the steel sheet that the prefabrication field adopted 8mm, and the sunshade is prefabricated according to design length. The shutter concrete tamping adopts the combined action of an inserted vibrating rod and an attached vibrator, and the concrete adopts hard concrete to ensure the smoothness of the outer surface of the shutter. And (4) strictly checking the prefabricated components to ensure the quality of finished products, wherein the maximum error of the sizes of all parts cannot exceed 2mm, and the diagonal error cannot exceed 4 mm. The step of installing the shield is that the shield is installed and then the position of the shield is heightened by 2cm of mortar with the same grade, the lower section of the bridge deck system is filled with epoxy resin, and the higher section is installed after the bridge deck is chiseled to the designed elevation by manpower. A4 mm thick wood board is clamped between the two shielding plates, so that the installation gap is uniform and consistent. The top surface of the shielding plate is controlled to be horizontal by the leveling ruler, so that the consistency and the beauty of the outer contour line are ensured.

Specifically, the upright columns and the handrails of the handrail are prefabricated in a concentrated mode in a sun-benefiting board manufacturing field, the handrail is installed on the field, ink lines are arranged on the edges of the opening of the installed shielding plate in a bouncing mode, the positions of each upright column and each partition column are located, and the edge lines of the upright columns and the partition columns are drawn out by pencils according to the size. Two lines are pulled according to the design height requirement, the height of the upright post and the positions of two edges are respectively controlled, the positions of the two lines are required to be accurate, and a supporting point is arranged in the middle 2 m. Fill up with high-grade mortar in the sunshade notch and lay the stand to the sunshade notch according to the location of ink line and act as go-between again, adjust the straightness that hangs down of stand with the plumb bob, must not exceed 1mm in the height range, and the left and right sides deviation must not exceed 2mm, adopts the preliminary fixed stand of wooden wedge after the dress is good. And after one side is installed, the integral line shape of the upright post is adjusted. It is required that the error from the bridgehead to the middle of the bridgetail should not exceed 2 mm.

Specifically, the cable duct is composed of a vertical wall and a cover plate. The concrete cover plate and the shielding plate are centrally prefabricated by a Yiyang plate yard, and then are transported to a construction site by a transport vehicle, and the concrete cover plate and the shielding plate are installed manually on a bridge by a wheel crane. For the convenience of cable trough equipment inspection, the cover plate is replaced by a movable cover plate every 10m or so.

Specifically, the railway bridge expansion device is an important connecting part between the beam ends of the railway bridge, the main functions of the railway bridge expansion device are to meet the requirements of the beam ends on all-directional displacement, collect water, drain water and prevent water from corroding the beam ends and a lower structure, and the quality and the waterproof performance of the railway bridge expansion device directly influence the durability of the whole bridge. The requirement on the durability of the high-speed railway is high, and reliable waterproof expansion devices must be adopted between beam joints to protect beam bodies and bridge substructure structures. The weather-resistant profile steel for the expansion joint is made of Q355NH weather-resistant steel, the anchor bars are made of Q235 reinforcing steel bars, and the waterproof rubber bars are made of chloroprene rubber (the monthly average temperature is-25 ℃ to +60 ℃).

Specifically, during construction of the contact network strut foundation, the contact network, the anchor bolts and the reinforcing steel bars of the lower anchor stay wire foundation are embedded at corresponding positions during prefabrication of the beam body, and the lower anchor stay wire foundation reserved steel bars are arranged. And (3) pouring the upright walls of the concrete cable groove of the support foundation together, accurately and stably pouring the template, coating oil on the embedded bolts for protection after the concrete is poured, and well performing concrete maintenance. The pre-buried contact net needs to be accurate, and the pre-buried bolt position of the pre-buried pillar foundation is accurate according to the design drawing.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. The swivel beam structure construction process is characterized by comprising the following steps

2. The swivel beam structure construction process according to claim 1, wherein the mounting of the lower ball joint in S1 comprises: a. installing a lower spherical hinge framework: accurately paying off, namely, paying off a central point and four corner points on a lower bearing table surface by using a total station, hoisting and aligning, hoisting a lower spherical hinge framework to a designed position, centering pull wires, manually adjusting and aligning the four corner points, performing elevation control, measuring elevations of the four corners, adjusting the bottom of the framework to ensure the level of an upper plane, welding and fixing, and firmly welding the embedded steel bars and the framework after the framework is positioned; b. lower spherical hinge installation, the on-the-spot equipment of lower spherical hinge, the connection of spherical hinge and skeleton down mainly, this part is bolted connection, and other components all weld the equipment in the factory and accomplish, accurate positioning and adjustment: the lower spherical hinge is suspended by using the framework and the adjusting bolt, the central position is adjusted, and then the elevation is adjusted by means of vertical rotation of the fixed adjusting screw rod.

3. The swivel beam structure construction process according to claim 1, wherein in the step S4, a high polymer modified asphalt treatment agent is sprayed on the inner side of the bridge deck protection wall, a high polymer modified asphalt waterproof coiled material is laid, a C40 fiber concrete protective layer is covered on the high polymer modified asphalt waterproof coiled material, the total thickness is 60mm, a polyurethane waterproof coating is coated in a cable groove on the outer side of the protection wall, a C40 fiber concrete protective layer is covered on the waterproof coating, the total thickness is 40mm, a waterproof coiled material additional layer is adhered on the root part of the protection wall through the waterproof coating, the thickness of the additional layer coiled material is 0.5mm, the width is 350mm, the additional layer is horizontally laid for 300mm, the additional layer is vertically folded for 50mm, then the waterproof coiled material and the protective layer are laid, and the polyurethane coating is firstly adhered on the water drainage pipe port for adhering the additional layer; the coiled material of the additional layer is selected to be 0.5mm in thickness, 400mm multiplied by 350mm in length and width, a hole is formed in the middle of the coiled material, the coiled material is cut into a plurality of triangles and is tightly attached to the lower inner wall of the water discharge pipe opening, the edge of the waterproof coiled material and the joint of the concrete of the protective layer and the beam body are sealed by polyurethane coating, the height of the sealed edge is not less than 80mm, and the lap joint of the waterproof coiled material is sealed by the polyurethane coating.

4. The swivel beam structure construction process according to claim 1, wherein in S1, the slide construction is the same as that of the lower spherical hinge framework, the slide is assembled in sections on site, and is adjusted and fixed by adjusting bolts, so that the strut can slide in the slide during swivel to keep the swivel structure stable, and the top surface of the slide is required to be 1cm higher than the top surface of the concrete of the lower turntable, and the whole slide surface is on the same horizontal plane.

5. The swivel beam structure construction process according to claim 1, wherein in S1, concrete pouring vibrating holes and air exhaust holes are formed in the lower spherical hinge to ensure that concrete is dense and has no hollow, and the pouring sequence of concrete is performed from the center to the periphery.

6. The swivel beam structure construction process according to claim 1, wherein in S1, the step of installing the upper ball hinge is as follows:

a, cleaning the spherical surfaces of the upper spherical hinge and the lower spherical hinge;

b, placing butter into the center pin shaft sleeve, placing the center pin shaft into the sleeve, and adjusting the verticality and the peripheral gap;

c, installing sliding pieces on the concave spherical surface of the lower spherical hinge from inside to outside according to the number, wherein each sliding piece is positioned on the same spherical surface; after the detection is qualified, coating butter between the sliding pieces on the spherical surface, and enabling the butter to be uniformly filled in the space between the sliding pieces and to be slightly higher than the top surfaces of the sliding pieces;

d, hoisting the upper spherical hinge in place and sleeving the upper spherical hinge into the central pin shaft; finely adjusting the position of the upper spherical hinge by using a reverse chain to enable the upper spherical hinge to be horizontal and vertical to the gap of the outer ring of the lower spherical hinge; the clearance between the pin shaft and the upper and lower spherical hinges and the smoothness between the pin shaft and the steel pipe channel are ensured;

e, protecting the periphery after the spherical hinges are installed, and tightly winding and wrapping the upper spherical hinge and the lower spherical hinge by using an adhesive tape to ensure that impurities do not enter the friction surface;

f, finally hoisting the rest of the plane steel plates and the upper spherical hinge steel protective cylinder, adding butter into the sleeve, then putting the sleeve into the pin shaft and rotating, overflowing the butter, and then coating the butter on the pin shaft; uniformly touching a layer of butter on the surface of the sliding sheet, wherein the butter is slightly higher than the sliding sheet; the upper spherical hinge is hung on the upper surface of the lower spherical hinge, and the centers of the upper spherical hinge and the lower spherical hinge are overlapped; the upper spherical hinge is rotated to enable redundant grease to overflow, the sliding sheet is well attached to the upper spherical hinge, and the gap between the upper spherical hinge and the lower spherical hinge is closed in time;

g, the spherical mandrel of the upper spherical hinge and the spherical hinge coincides with the rotation center of the spherical hinge, the central axis of the welded steel pipe of the upper spherical hinge and the lower spherical hinge coincides with the rotation central axis, and the error is not more than 1 mm.

7. The swivel beam structure construction process according to claim 1, wherein in S1, the traction cable comprises two traction cables, the traction cable is 12 phi S15.24 steel cables, and the traction cable steel cables are in a forward rotation mode and a reverse rotation mode, wherein 1 beam of the traction cable steel cables is in a forward rotation mode and 1 beam of the traction cable steel cables is in a reverse rotation mode; the embedded ends of the traction cables in the concrete are anchored by adopting OVM 15-12P-type anchors, the positioning steel plates fixed on the bottom layer steel bars are utilized to determine the plane position and the height of the steel strands, the anchoring ends of the same pair of traction cables are positioned on the same straight line and are symmetrical with the circle center of the rotary table, the embedded height and the traction direction of each cable are consistent, the length of each cable embedded into the rotary table is 3.2m, when the external length is 14.64m, the traction cable supporting steel bars are embedded, and the outer leakage parts of the traction cables are wound around the rotary table template in a circle and are placed on the embedded bars without mutual interference.

8. The swivel beam structure construction process according to claim 1, wherein in S2, the 0# block bracket is a spiral steel tube steel bracket; from down to up do in proper order: the bearing platform comprises a bearing platform foundation, steel pipe stand columns, I-shaped steel triangular trusses and a square wood bamboo plywood bottom die;

the method comprises the following steps: a bearing platform is used as the foundation of the whole bracket system;

secondly, steel pipe column: the upright posts are made of spiral steel pipes, 2 rows of the upright posts are respectively arranged along two sides of the central line of the beam body, 3 upright posts are arranged in each row, and the distance between the centers of the upright posts in each row along the bridge direction is 3.0 m; 3 rows of the transverse bridge are arranged by taking the center line of the pier as the center, and the distance is 3.3 m;

③ the beam: the steel pipe is formed by welding 2 double-spliced I-shaped steels and is placed on a bearing plate at the top of a spiral steel pipe upright post;

fourthly, triangular truss: the longitudinal beams are formed by combining I-shaped steel, and 12 longitudinal beams are arranged on one side; the arrangement form is as follows: 10 groups of triangular trusses are installed in the single-side web plate and the enlarged block area, 3 groups of triangular trusses are paved on the bottom plate, 4I-shaped steels are arranged in the single-side flange plate area in a through-length mode, and the distance is 3 multiplied by 60+9 multiplied by 30+6 multiplied by 60+9 multiplied by 30+3 multiplied by 60cm from inside to outside; the working platform is 11 multiplied by 1.5 m;

bottom die: the No. 0 block bottom die adopts square wood and bamboo plywood.

9. The swivel beam structure construction process according to claim 1, wherein in S2, the procedure of hanging basket assembly is as follows:

leveling beam surface

After the No. 0 block is constructed, leveling the top surface of the beam body below the walking beam pad beam by using medium coarse sand;

② laying the bolster

Uniformly arranging the cushion beams on the beam body according to the distance of 500 mm;

mounting walking beam

Installing a head section walking track from the transverse central line of the 0# block to the 1# and 1' # sections by 1m, wherein the track configuration length is 4m +4 m; before installation, the top surface of the walking beam is leveled, the central line of the walking beam is accurately determined, a walking track beam is placed on a pad beam, and then an anchoring bolt is installed and the walking beam is locked;

front and rear supports for mounting hanging basket

The rear support penetrates through the rear end of the walking beam, and the front support penetrates through the front end of the walking beam; because the No. 1 block adopts the conjoined hanging basket, the left side and the right side share the rear support, and the front support and the rear support need to be accurately positioned;

sixthly, installing the main truss of the hanging basket

The main framework of the hanging basket is divided into six parts which are respectively: the device comprises an upper flat rod, a lower flat rod, a rear pull rod, a front inclined rod, a vertical rod and a bidirectional parallel connection;

the concrete assembling sequence is as follows: firstly, hoisting a lower flat rod, simultaneously installing the lower flat rods of the left and right hanging baskets in place, then installing an upright rod, arranging a temporary support, then installing a front pull rod and a rear pull rod, and locking the front pull rod and the rear pull rod with the lower flat rod and the upright rod; after the rear pull rods on the left side and the right side are locked, firstly installing the rear anchor, then connecting the rear anchor in parallel, penetrating the rear anchor, and then arranging double-nut anchoring on the rear anchor pull rods; the upper horizontal rod and the front inclined rod are adjusted in angle in the site, the section steel is temporarily locked and then is assembled by integral hoisting of a truck crane, and finally, the bidirectional horizontal connection is installed;

seventhly, a hanging system for mounting a hanging basket and a bottom die

After the basket hanging main truss is installed, immediately installing a basket hanging rear anchor suspension rod and a rear anchor parallel connection, applying prestress to the basket hanging rear anchor suspension rod by using a jack for anchoring, and then installing a basket hanging template suspension rod;

then installing a hanging basket bottom die; the specific installation method comprises the following steps: hoisting an upper beam to a position corresponding to the upper beam in front of the hanging basket in the field, hoisting a suspender to penetrate into the hole, and setting double nuts for anchoring; when the hanging rods are installed, the hanging rods are ensured to be vertical, bending is avoided, and all anchoring hanging rods are anchored by double nuts;

assemble die block platform at pier bottom includes: the bottom die comprises a front lower cross beam, a rear lower cross beam, a bottom die longitudinal beam, a front and rear suspender frame beam and a bottom die panel; adopting a 35T wheel type truck crane and a 70T wheel type truck crane, adopting four hoisting points of 2 steel wire ropes to integrally hoist the bottom die platform to be positioned at the bottom of the No. 1 block, wherein the hoisting points are arranged on the front lower cross beam and the rear lower cross beam; the rear lower cross beam is suspended on the poured beam section bottom plate concrete by using the suspended suspension rod, and the front lower cross beam is suspended on the front upper cross beam of the suspension basket;

installing side mould and slideway beam

When the outer mold is assembled on the hanging basket, the installation work of the side mold slideway can be carried out; the installation process is as follows: firstly, determining the front-back position relation between a cradle side mold back frame and an outer slideway beam, then penetrating the outer slideway beam into the outer mold back frame by using an automobile crane, and fixing; penetrating a fixed and movable sliding frame hanger at the rear end of the sliding beam, integrally hoisting by using an automobile crane, anchoring the front end on a front hoisting belt which is placed in advance, placing a finish rolling deformed steel bar suspender at the rear end through a flange plate pre-embedded suspender hole, and anchoring the fixed hanger on the suspender by using double nuts;

ninthly adjusting the posture of the cradle

Lifting the rear end suspender after the side mold is installed in place to ensure that the bottom mold and the side mold are tightly attached to the poured section concrete, and applying prestress by using a jack for anchoring; adjusting the front and rear positions of the cradle according to the measurement control points, and simultaneously moving the bottom side die to accurately position the bottom side die; and locking the rear anchor point of the bottom side die.