CN114808654A - A kind of fully prefabricated prefabricated bridge and its construction method - Google Patents

Abstract

The invention discloses a fully prefabricated and assembled bridge and a construction method thereof, comprising a pipe pile, a cap, a pier column, a cover beam and a bridge superstructure. The pipe pile is driven into the ground by a driving method or an implantation method, The caps are arranged on the upper end of the pipe piles after the insertion and driving, four pipe piles are arranged under each cap, the upper part of the cap is inserted with the pier column, the lower part of the cover beam is fixedly connected with the pier column, and the cover is connected to the pier column. The installation direction of the beam is perpendicular to the direction of the bridge, the cover beam is a steel plate composite beam pier top cover beam or a light T-beam pier top cover beam, the cover beam is provided with a bridge superstructure along the bridge direction, and the bridge superstructure is a narrow box Composite beam, steel plate composite beam or light T beam. The fully prefabricated bridge has simple structure, clear force transmission path and strong bearing capacity. The construction platform is built on the piles driven in advance, which can realize the whole process of the fully prefabricated bridge. construction efficiency.

Description

A kind of fully prefabricated prefabricated bridge and its construction method

technical field

The invention relates to the technical field of prefabricated bridges, in particular to a fully prefabricated prefabricated bridge and a construction method thereof.

Background technique

In recent years, all kinds of large and extra-large railway bridges have been built one after another, and some of them are built using prefabricated construction. The research and application of prefabricated concrete bridges in China is later than that in foreign countries. With the development of my country's economy in recent years, a large number of bridges have been built, many new technologies and processes have been applied, and more and more prefabricated bridges have appeared. , but there is no fully prefabricated bridge, and the fully prefabricated bridge is an opportunity for highway construction to enter a new level, and it is also the development direction of future bridges.

The development of fully prefabricated prefabricated bridges has brought great convenience. Most of the bridge construction processes are completed in the factory, which minimizes the impact on the construction site environment. Prefabricated installation can shorten the construction period of bridges, but China's prefabricated bridges The development is relatively late, and some technical details are immature, resulting in a long construction period. Therefore, in order to solve the above problems, we have designed a fully prefabricated bridge and its construction method.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to overcome the existing defects and provide a fully prefabricated bridge and a construction method thereof. Assembly can effectively solve the problems in the background technology.

In order to achieve the above purpose, the present invention provides the following technical solutions: a fully prefabricated bridge, comprising pipe piles, caps, pier columns, cover beams and bridge superstructure, and the pipe piles are inserted by a driving method or an implantation method. Drive into the ground, the caps are arranged at the upper end of the pipe piles after the insertion and driving, four pipe piles are arranged under each cap, the upper part of the cap is inserted with the pier column, and the lower part of the cover beam is fixed to the pier column connected, and the setting direction of the cover beam is perpendicular to the direction of the bridge, the cover beam is a steel plate composite beam pier top cover beam or a light T-beam pier top cover beam, the cover beam is provided with a bridge superstructure along the bridge direction, and the upper part of the bridge The structure is a narrow box composite beam, a steel plate composite beam or a light T beam, and when the bridge superstructure is a narrow box composite beam or a light T beam, the corresponding cover beam is a light T beam pier top cover beam, and the bridge superstructure is When the steel plate composite beam is used, the corresponding cover beam is the steel plate composite beam pier top cover beam, and the pipe piles, caps, pier columns, cover beams and bridge superstructure are all prefabricated structures.

Further, steel bars with the same length as the thickness of the cover beam are reserved at the upper end of the pier column, and metal corrugated pipes are also reserved in the middle of the cover beam. plugged in.

A construction method for a fully prefabricated bridge, comprising the following steps:

S1 Prefabricated pipe piles, caps, pier columns, cover beams and bridge superstructures according to the design specifications, and the pipe piles and pier columns are prefabricated by centrifugal method;

S2 pipe pile construction, the pipe pile is constructed by driving method or implantation method;

For the construction of the S3 cap, a crane is used to hoist the cap, so that the bottom of the cap is fixedly connected to the pipe pile;

S4 pier column construction, the pier column is hoisted by a crane, so that the bottom of the pier column is fixedly connected to the bearing platform;

S5 cover beam construction, when the cover beam is installed, the crane is hoisted, and the lower part of the cover beam is fixedly connected to the pier column;

S6 bridge superstructure construction, the bridge superstructure is installed above the cover beam by crane, and finally the wet joint concrete between the bridge superstructure is poured. The bridge superstructure adopts three structures of narrow box composite beam, steel plate composite beam and light T beam. The full-width erection process is used when the T beam is erected;

S7 repeats steps 1) to 6) in sequence to continuously complete the construction of the fully prefabricated bridge.

Further, the concrete grade of the prefabricated pipe piles is C80, the steel bars are prestressed steel bars with a tensile strength of not less than 1420MPa, and the length of the single-section pipe piles is 7-15m, in increments of 1m modulus.

Further, the bearing platform is a hollow cup-shaped structure with a size of 3*3*2m.

Further, the specifications of the pier column: hollow cylindrical structure, with an outer diameter of 1.2m, an inner diameter of 0.7m, a wall thickness of 0.25m, and a precast concrete strength grade of C80.

Further, when the cover beam is a steel plate composite beam pier top cover beam, the size is 1.8*1.8*1m, and C40 concrete is used for pouring; when the cover beam is a light T beam pier top cover beam, the size is 4.8*1.9*1.4m.

Further, the construction method of the prefabricated cover beam includes the following steps:

When installing the A1 skeleton, when tying the steel bars, the intersections of the steel bars should be tied with wire ties. The lap length of HPB235 steel bar shall not be less than 25d, the lap length of HRB steel bar shall not be less than 35d, and the lap length of HRB400 and RRB400 steel bar shall not be less than 45d. The number of pads shall not be less than 4/㎡;

A2 formwork is installed, and the steel frame is installed by gantry crane. After the installation is completed, the bellows positioning steel rod is used to locate the bellows. After completion, the rotating screw is used to close the mold; the prefabricated cover beam formwork adopts the stereotyped steel form, and the formwork is painted before use. After the film coating agent, the reinforcement frame is bound, the pre-embedded steel bars, the pre-embedded steel plates and the corrugated pipes are installed and the formwork is erected;

A3 Concrete pouring, the concrete pouring is carried out in a layered and continuous way, and construction joints shall not be left at will; vibrate after pouring, and use a plug-in vibrator to vibrate the concrete. The vibrating time is subject to the surface flooding or no big bubbles. The vibrating of the plug-in vibrator adopts layered vibrating, fixed-point vibrating, fast insertion and slow dialing, and the insertion points are evenly arranged and moved point by point, without vibration leakage. , the moving distance should not be greater than 1.5 times the action radius of the vibrator. When vibrating the upper layer, it should be inserted into the lower layer 5-10cm to eliminate the joint between the two layers. The vibration time interval should not be greater than the initial setting time of the lower layer of concrete;

A4 Maintenance and storage: After the formwork is removed, the newly exposed concrete should be quickly cured in the later stage, and the exposed surface concrete should be covered or wrapped with geotextile, and the curing time should not be less than 7d.

Further, before pouring concrete, designate a special person to carefully check the position and quantity of the steel protective layer pads and the degree of tightening of the formwork, brackets, steel bars and embedded parts. The wire ends of the binding pads and reinforcing bars shall not protrude into the protective layer.

Further, the installation method of the cover beam includes the following steps:

B1 leveling layer construction, review the elevation of the prefabricated pier top before construction, clean the splicing surface of the pier top, lay the grout template and level it after cleaning, and lay a 2cm-thick C50 epoxy mortar leveling layer. The top of the pier is sprinkled and moistened;

B2 component transportation, the prefabricated components can be transported after the concrete strength reaches 90% of the design strength, and the components are transported from the prefabricated site to the construction site by vehicles;

B3 component installation, when the cover beam is assembled, use the crawler crane to hoist the cover beam to the top of the pier column and stop the descent when it is more than 10cm away from the top surface of the steel bar of the pier column. Use manual auxiliary positioning. After accurate alignment, slowly lower the cover beam, and the upper end of the pier column is reserved. The steel bars are inserted into the metal corrugated pipes inside the cover beam, and after being inserted, the metal corrugated pipes are grouted one by one.

Further, the metal bellows should be made into an integral module with stirrups and anchoring steel bars and then placed in the cover beam reinforcement cage.

Compared with the prior art, the beneficial effects of the present invention are: the fully prefabricated prefabricated bridge and its construction method have the following advantages:

1. The fully prefabricated bridge has a simple structure, clear force transmission path, and strong bearing capacity. The construction platform is built on the piles driven in advance, which can realize the full prefabricated bridge. The efficiency of construction is improved; in addition, during the construction operation, there is no need to build trestle bridges and access roads around the bridge, thereby reducing the damage to the original environment around the bridge.

2. The pipe pile adopts the driving method and the implantation method. The pier column is prefabricated by the centrifugal method and installed by crane; the cover beam is prefabricated by the rotating hinge template, which eliminates the installation and dismantling of the gantry crane and releases the production capacity.

Description of drawings

1 is a schematic front view of a fully prefabricated bridge of the present invention;

Figure 2 is a schematic side view of a fully prefabricated bridge of the present invention;

Fig. 3 is a schematic diagram of the reinforcement of the pipe pile structure in the present invention;

Fig. 4 is the structural representation of the platform in the present invention;

Fig. 5 is the structural representation of the cover beam in the present invention;

6 is a schematic top view of a cover beam in the present invention.

In the picture: 1 pipe pile, 2 cap, 3 pier column, 4 cover beam, 5 bridge superstructure.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention, that is, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. The components of the embodiments of the invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

Thus, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the present invention.

It should be noted that relational terms such as the terms "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any relationship between these entities or operations. any such actual relationship or sequence exists. Moreover, the terms "comprising", "comprising" or any other variation thereof are intended to encompass a non-exclusive inclusion such that a process, method, article or device comprising a list of elements includes not only those elements, but also includes not explicitly listed or other elements inherent to such a process, method, article or apparatus. Without further limitation, an element qualified by the phrase "comprising a..." does not preclude the presence of additional identical elements in a process, method, article or apparatus that includes the element.

The features and performances of the present invention will be further described in detail below in conjunction with the embodiments.

Please refer to Figures 1-6, the present invention provides the following technical solutions:

As shown in Figure 1-2, a fully prefabricated bridge includes pipe piles 1, caps 2, pier columns 3, cover beams 4 and bridge superstructure 5. Pipe piles 1 are inserted by driving method or implantation method. Drive into the ground, the cap 2 is arranged on the upper end of the pipe pile 1 after the insertion and driving, four pipe piles 2 are arranged below each cap 1, the top of the cap 2 is inserted with the pier column 3, and the cover beam 4 The lower part is fixedly connected to the pier column 3, and the setting direction of the cover beam 4 is perpendicular to the direction of the bridge. The cover beam 4 is a steel plate composite beam pier top cover beam or a light T beam pier top cover beam, and the cover beam 4 is set along the bridge direction. There is a bridge superstructure 5, the bridge superstructure 5 is a narrow box composite beam, a steel plate composite beam or a light T beam, and when the bridge superstructure 5 is a narrow box composite beam or a light T beam, the corresponding cover beam 4 is a light T beam pier top Cover beam, when the bridge superstructure 5 is a steel plate composite beam, the corresponding cover beam 4 is a steel plate composite beam pier top cover beam. Prefabricated structure, in this embodiment, the bridge superstructure 5 is a light T beam.

Among them, the upper end of the pier column 3 is reserved with steel bars whose length is the same as the thickness of the cover beam 4, and the middle of the cover beam 4 is also reserved with metal bellows. plugged in.

A construction method for a fully prefabricated bridge, which utilizes the above-mentioned construction platform, comprises the following steps:

S1 are prefabricated pipe piles 1, caps 2, pier columns 3, cover beams 4 and bridge superstructure 5 respectively according to the design specifications, and the pipe piles 1 and pier columns 3 are prefabricated by centrifugal method;

S2 pipe pile 1 is constructed, and the pipe pile 1 is constructed by driving method or implantation method;

S3 for the construction of the bearing platform 2, the bearing platform 2 is hoisted by a crane during the installation, so that the bottom of the bearing platform 2 is fixedly connected with the pipe pile 1;

S4 pier column 3 is constructed, and the pier column 3 is installed by crane hoisting, so that the bottom of the pier column 3 is fixedly connected with the bearing platform 2;

S5 cover beam 4 is constructed. When the cover beam 4 is installed, a crane is used to hoist it, and the lower part of the cover beam 4 is fixedly connected to the pier column 3;

S6 Construction of the bridge superstructure 5, the bridge superstructure 5 is installed above the cover beam 4 by a crane, and finally the wet joint concrete between the bridge superstructure 5 is poured. The bridge superstructure 5 adopts narrow box composite beams, steel plate composite beams and light T beams Three structures, the full-width erection process is used for the erection of light T-beams;

S7 repeats steps 1) to 6) in sequence to continuously complete the construction of the fully prefabricated bridge.

As shown in Figure 3, the concrete grade of the prefabricated pipe pile 1 is C80, the steel bar is a prestressed steel bar with a tensile strength of not less than 1420MPa, and the length of the single-section pipe pile is 7-15m, and the modulus is incremented by 1m.

As shown in Figure 4, the support platform 2 is a hollow cup-shaped structure with a size of 3*3*2m.

Among them, the specifications of pier column 3: hollow cylindrical structure, outer diameter of 1.2m, inner diameter of 0.7m, wall thickness of 0.25m, and precast concrete strength grade of C80.

Among them, when the cover beam 4 is a steel plate composite beam pier top cover beam, the size is 1.8*1.8*1m, and C40 concrete is used for pouring.

In another embodiment, as shown in Figures 5-6, when the cover beam 4 is a light-duty T beam pier top cover beam, the size is 4.8*1.9*1.4m.

In step S1, the construction method of the prefabricated cover beam 4 includes the following steps:

The A1 skeleton is installed, and the steel bars are processed in the standardized steel bar processing plant. When tying the steel bars, the intersections of the steel bars are tied with wire ties. Bend inward and shall not protrude into the protective layer; the lap length of HPB235 rebar shall not be less than 25d, the lap length of HRB rebar shall not be less than 35d, and the lap length of HRB400 and RRB400 shall not be less than 45d. Protection welding, welding joints are double-sided welding. The number of pads shall not be less than 4/㎡;

A2 formwork is installed, and the steel frame is installed by gantry crane. After the installation is completed, the bellows positioning steel rod is used to locate the bellows. After completion, the rotating screw is used to close the mold; the prefabricated cover beam formwork adopts the stereotyped steel form, and the formwork is painted before use. After the film coating agent, the binding of the steel skeleton, the embedded steel bars, the embedded steel plates and the corrugated pipes are completed, the formwork shall be erected; Speed up template installation and positioning, reduce labor and mechanical resource consumption;

A3 Concrete pouring. Before pouring concrete, designate a special person to carefully check the position and quantity of the steel protective layer pads and the degree of tightening of the formwork, brackets, reinforcing bars and embedded parts. The pads on the side and bottom of the component should be at least 4/m2 , the wire ends of the binding pads and steel bars shall not protrude into the protective layer. The concrete is poured in a layered and continuous way, and construction joints shall not be left at will; vibrate after pouring, and use a plug-in vibrator to vibrate the concrete. Do not randomly add vibration points or leak vibration. The vibration time of each point is subject to the surface slurring or no large bubbles. The vibration of the plug-in vibrator adopts layered vibration, fixed-point vibration, fast insertion and slow dialing. The insertion points are evenly arranged, move point by point without vibration leakage, and the moving distance is not greater than 1.5 times the action radius of the vibrator. The time interval shall not be greater than the initial setting time of the lower concrete;

A4 Maintenance and storage: After the formwork is removed, the newly exposed concrete should be quickly cured in the later stage, and the exposed surface concrete should be covered or wrapped with geotextile, and the curing time should not be less than 7d.

After prefabrication, the installation method of the cover beam 4 includes the following steps:

B1 leveling layer construction, review the elevation of the prefabricated pier top before construction, clean the splicing surface of the pier top, lay the grout template and level it after cleaning, and lay a 2cm-thick C50 epoxy mortar leveling layer. The top of the pier is sprinkled and moistened;

B2 component transportation, the prefabricated components can be transported after the concrete strength reaches 90% of the design strength, and the components are transported from the prefabricated site to the construction site by vehicles;

B3 component installation, when the cover beam 4 is assembled, use the crawler crane to hoist the cover beam 4 to the height of 10cm away from the top surface of the pier column 3, and stop descending, use manual assistance for positioning, and then slowly lower the cover beam 4 after accurate alignment. The steel bars reserved at the upper end of the column 3 are inserted into the metal corrugated pipes inside the cover beam 4. After plugging, the metal corrugated pipes should be grouted one by one. Special grouting equipment should be used for the grouting equipment. Test blocks should be prepared when mixing the high-strength non-shrinkage cement grouting material. , corresponding to each splicing part, no less than 3 groups should be prepared to test the compressive strength at 7 days and 28 days respectively.

Among them, the metal bellows should be made into an integral module with stirrups and anchoring steel bars and then placed in the cover beam reinforcement cage. The allowable deviation of the metal bellows installation and positioning is ±2mm, and the hoisting point of the cover beam 4 steel cage should be partially strengthened, and at the same time All kinds of embedded parts such as the hanging point embedded parts required for the finished product of the cover beam 4, the embedded parts for on-site adjustment equipment, the support embedded parts and other embedded parts should be installed. Stiffness, bearing capacity, stability requirements.

Before the concrete is poured, the positioning of the metal bellows should be checked again, and the allowable deviation is ±2mm; at the same time, the surface elevation and levelness of the pedestal should be re-measured, and the allowable deviation of the elevation is ±1mm; the allowable deviation of the levelness is ±1mm/m; The concrete of the beam 4 should be poured at one time. After the prefabrication of the cover beam is completed, the space size of the cover beam 4 and the positioning of the metal bellows should be re-measured. The allowable deviations are ±2mm.

It is worth noting that the steel plate composite beam pier roof beam, the light T beam pier roof beam, the narrow box composite beam, the steel plate composite beam, and the light T beam disclosed in this embodiment are all commonly used technologies in construction projects. And the composition structure and principle have been disclosed, which can be freely configured according to actual application scenarios.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (10)

1. The utility model provides a full prefabricated assembled bridge which characterized in that: including tubular pile (1), cushion cap (2), pier stud (3), bent cap (4) and bridge superstructure (5), tubular pile (1) adopts and squeezes into the underground or the method of implanting is inserted into, cushion cap (2) set up tubular pile (1) upper end after inserting and beating to finish, every cushion cap (1) below sets up four tubular piles (2), cushion cap (2) top is pegged graft with pier stud (3), bent cap (4) lower part and pier stud (3) fixed connection, and bent cap (4) set up the direction perpendicular with the bridge direction, bent cap (4) are steel sheet combination beam pier top bent cap or light-duty T roof beam pier bent cap, bent cap (4) are gone up and are provided with bridge superstructure (5) along the bridge direction, bridge superstructure (5) are narrow case combination beam, steel sheet combination beam or light-duty T roof beam, when superstructure (5) are narrow case combination beam or T roof beam, the corresponding bent cap (4) is a light T-shaped beam pier top bent cap, when the bridge superstructure (5) is a steel plate composite beam, the corresponding bent cap (4) is a steel plate composite beam pier top bent cap, and the tubular pile (1), the bearing platform (2), the pier stud (3), the bent cap (4) and the bridge superstructure (5) are all of a fully prefabricated structure.

2. The fully prefabricated assembled bridge according to claim 1, wherein: the upper end of each pier column (3) is reserved with a steel bar with the length consistent with the thickness of the cover beam (4), a metal corrugated pipe is reserved in the middle of the cover beam (4), and the metal corrugated pipe is matched with the implanted steel bars in number and arrangement position and is spliced in a one-to-one correspondence manner.

3. The construction method of a fully prefabricated assembly type bridge according to claim 1 or 2, wherein: the method comprises the following steps:

s1, prefabricating the tubular pile (1), the bearing platform (2), the pier stud (3), the cover beam (4) and the bridge superstructure (5) according to design specifications, wherein the tubular pile (1) and the pier stud (3) are prefabricated by a centrifugal method;

s2, constructing the tubular pile (1), wherein the tubular pile (1) is constructed by a driving method or an implanting method;

s3, constructing a bearing platform (2), wherein the bearing platform (2) is hoisted by a crane during installation, so that the lower part of the bearing platform (2) is fixedly connected with the tubular pile (1);

s4, constructing the pier stud (3), and hoisting the pier stud (3) by using a crane during installation to fixedly connect the lower part of the pier stud (3) with the bearing platform (2);

s5, constructing a bent cap (4), hoisting the bent cap (4) by using a crane during installation, and fixedly connecting the lower part of the bent cap (4) with the pier stud (3);

s6, constructing a bridge superstructure (5), installing the bridge superstructure (5) above the capping beams (4) through a crane, and finally pouring wet joint concrete among the bridge superstructure (5), wherein the bridge superstructure (5) adopts three structures of narrow box combination beams, steel plate combination beams and light T beams, and the light T beams are erected by using a full-width erection process;

s7, repeating the steps 1) to 6) in sequence, and then continuously completing the construction of the fully prefabricated assembled bridge forwards.

4. The construction method of the fully prefabricated assembly type bridge according to claim 3, wherein: the concrete grade of the precast tubular pile (1) is C80, the steel bars are prestressed steel bars with the tensile strength not less than 1420MPa, the length of a single-section tubular pile is 7-15m, and the modulus of the single-section tubular pile is increased progressively by 1 m.

5. The construction method of the fully prefabricated assembly type bridge according to claim 3, wherein: cushion cap (2) are hollow cup structure, size: 3 x 2 m.

6. The construction method of the fully prefabricated assembly type bridge according to claim 3, wherein: specification of the pier stud (3): the hollow cylindrical structure has the outer diameter of 1.2m, the inner diameter of 0.7m and the wall thickness of 0.25m, and the strength grade of the precast concrete is C80.

7. The construction method of the fully prefabricated assembly type bridge according to claim 3, wherein: when the capping beam (4) is a steel plate combined beam pier top capping beam, the size is 1.8 × 1m, and C40 concrete is poured; the capping beam is a lightweight T-beam pier top capping beam, with a dimension of 4.8 x 1.9 x 1.4 m.

8. The construction method of the fully prefabricated assembly type bridge according to claim 3, wherein: the construction method of the prefabricated capping beam (4) comprises the following steps:

a1 skeleton installation, when the lashing reinforcing bar, the crosspoint of reinforcing bar adopts the ligature silk ligature to be firm, the ligature adopts the 8 font mode crisscross ligature that changes the wire winding direction point by point, the iron wire that the ligature used should be incurved, must not stretch into the protective layer; the overlap joint length of the HPB235 steel bars for binding the steel bars is not less than 25d, the overlap joint length of the HRB steel bars is not less than 35d, the overlap joint length of the HRB400 steel bars and the RRB400 steel bars is not less than 45d, carbon dioxide arc welding is adopted for welding a steel bar framework, double-sided welding is adopted for welding joints, and the arrangement number of cushion blocks is not less than 4 per square meter;

a2 template installation, steel reinforcement framework installation by using gantry crane, after installation, corrugated pipe positioning is carried out by using corrugated pipe positioning steel bars, and after installation, mould assembly is carried out manually by using rotating screws; the prefabricated cover beam template adopts a shaped steel mould, a coating agent is coated before the template is used, and the template is erected after the binding of a steel reinforcement framework is finished and embedded parts such as embedded steel bars, embedded steel plates and corrugated pipes are installed;

a3 concrete pouring, wherein the concrete pouring is carried out in a layered continuous pushing mode, and a construction joint cannot be left at will; vibrating after pouring, adopting an inserted vibrator to vibrate concrete, avoiding randomly encrypting vibration points or leaking vibration, wherein the vibration time of each point is based on surface slurry spreading or no large bubble, the vibration of the inserted vibrator adopts layered vibration, fixed-point vibration, fast insertion and slow pulling, insertion points are uniformly arranged and move point by point, avoiding leaking vibration, the moving distance is not more than 1.5 times of the action radius of the vibrator, the lower layer is inserted for 5-10cm when the upper layer is vibrated, so as to eliminate the seam between the two layers, and the vibration time interval is not more than the initial setting time of the lower layer concrete;

a4 maintenance and storage, after the form is removed, the newly exposed concrete is quickly subjected to later stage wet maintenance, the exposed concrete is covered or wrapped by geotextile, watering maintenance is carried out, and the maintenance time is not less than 7 d.

9. The construction method of a fully prefabricated assembled bridge according to claim 8, wherein: before concrete is poured, a designated specially-assigned person carefully checks the positions and the number of cushion blocks of a steel bar protective layer and the fastening degree of a template, a bracket, a steel bar and an embedded part, the cushion blocks on the side surface and the bottom surface of a member are at least 4/m 2, and the iron wire heads for binding the cushion blocks and the steel bar cannot extend into the protective layer.

10. The construction method of the fully prefabricated assembly type bridge according to claim 3, wherein: method for mounting a capping beam (4), comprising the steps of:

b1 leveling layer construction, rechecking the prefabricated pier top elevation before construction, cleaning the splicing surface of the pier top, laying a grout blocking template after cleaning, leveling, laying a C50 epoxy mortar leveling layer with the thickness of 2cm, and sprinkling water to the pier top for wetting before mortar laying;

b2, transporting the components, wherein the prefabricated components can be transported after the concrete strength of the prefabricated components reaches 90% of the design strength, and transporting the components from a prefabrication site to the construction site by using a vehicle;

b3 component installation, when bent cap (4) were assembled, use crawler crane to hoist bent cap (4) and stop descending when being greater than 10cm from pier stud (3) reinforcing bar top surface, use artifical assistance-localization real-time, after the accurate counterpoint, put down bent cap (4) slowly, pier stud (3) upper end is reserved the reinforcing bar and is inserted in the inside corrugated metal pipe of bent cap (4), pegs graft the back, is in milk one by one to corrugated metal pipe.

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