CN110700089A - A cast-in-place wet joint structure and bridge - Google Patents

Abstract

The invention relates to a bridge construction structure, and discloses a cast-in-place wet joint structure and a bridge, comprising a first UHPC prefabricated beam body and a second UHPC prefabricated beam body, and the first UHPC prefabricated beam body and the second UHPC prefabricated beam body are opposite. The ends are provided with notches in the upper and lower parts of the height direction, and the opposite ends of the first UHPC prefabricated beam body and the second UHPC prefabricated beam body are respectively provided with trapezoidal notches in the middle part of the height direction, so that the first UHPC prefabricated beam body is provided with trapezoidal notches. There is a rectangular space spaced between the opposite notches of the prefabricated beam body and the second UHPC prefabricated beam body, the opposite notches and the rectangular space form a T-strip, and the first UHPC prefabricated beam body and the second UHPC prefabricated beam body have a rectangular space. The trapezoidal notches are assembled to form the UHPC pouring space; the grooves and the UHPC pouring space are provided with embedded steel bars; the first UHPC prefabricated beam body and the second UHPC prefabricated beam body are provided with longitudinal steel bars along the length direction; UHPC blocks are poured in the strip and UHPC pour spaces. The present invention can effectively retard shrinkage of wet joints and reduce crack generation.

Description

A cast-in-place wet joint structure and bridge

technical field

The invention relates to a bridge construction structure, in particular to a cast-in-place wet joint structure. Furthermore, the present invention also relates to a bridge.

Background technique

With the development of modern construction technology, the performance requirements for wet joints are getting higher and higher. How to use the superiority of materials and improve the structure of wet joints to improve the performance of wet joints has also become an important content. As the main structural part of the bridge deck system of highway bridges, the wet joint structure carries heavy traffic loads on the bridge deck. The service life of the wet joint concrete has a huge impact on the normal operation of the bridge. Judging from the current status of the bridges that have been put into operation, Cracking at the wet joint structure has become a common phenomenon. The wet joint structure of most bridges is working with joints, and even the wet joint concrete of many highway bridges is poured, and the wet joint structure is in the maintenance period. Various degrees of water seepage have already occurred in the area, especially after rain, which can adversely affect the internal structure and durability of the bridge. After the concrete at the wet joint structure has cracks, rainwater or accumulated water on the bridge deck will enter the cracks, which will corrode the internal steel bars and rust the steel bars, which will cause tensile stress inside the concrete wrapped with the steel bars, resulting in a larger area cracked concrete.

When the wet joint is made of ordinary concrete, in order to ensure the good working performance of the wet joint, it is necessary to configure enough steel bars at the wet joint. When the number of precast concrete bridge decks or prefabricated concrete beams is large, there will be The following problems: (1) The welding workload of steel bars in wet joints is huge, which increases the use of materials, labor costs and time costs; (2) The welding construction time of steel bars in wet joints is long, which has a great impact on the traffic under the bridge. ; (3) The on-site welding quality of the reserved steel bars is poor, and when there is a positional deviation of the reserved steel bars of the bridge deck, it is necessary to correct the position of the steel bars before welding, and the construction process is cumbersome. (4) When the concrete is tamped, it is inconvenient to use the vibrator. (5) Because the general wet joint construction uses the sides of the beam body on both sides as side molds, and the side parts of the beam body are generally flat structures, such structures are prone to problems such as slurry leakage, honeycomb, and pockmarked surfaces as a pouring surface, which is a serious problem. Affects the structural strength of wet joints.

For the connection of UHPC prefabricated components (such as UHPC simply supported T beams and box girder segments) in prefabricated structures, it is generally realized in the form of prestressing and dry joints with tooth keys to meet the bending and shear resistance of the structure. It is required that due to the prestressed setting, the structural form of UHPC wet joint is generally not directly used to increase the difficulty of design and construction. Longitudinal connection of UHPC components can also be in the form of dry joints with prestressed and toothed keys, but if the components are thin, considering the length of prestressed tendons, the setting of anchoring areas, the appearance of the structure, etc., the prestressing outside or inside the body will be complicated. On the other hand, the old and new concrete steel fibers at the joints of UHPC prefabricated components are discontinuous, which affects the tensile performance of the UHPC joints. The bonding performance of new and old UHPC materials is limited by chiseling, spray infiltration, etc. It is necessary to design a new joint structure according to its stress conditions through structural treatment to ensure its safety and reliability.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a cast-in-place wet joint structure, which can effectively reduce the shrinkage of concrete and reduce the generation of cracks.

Further, the second technical problem to be solved by the present invention is to provide a bridge whose cast-in-place wet joint structure can effectively reduce the shrinkage of concrete and the generation of cracks.

In order to solve the above technical problems, the present invention provides a cast-in-place wet joint structure, comprising a first UHPC prefabricated beam body and a second UHPC prefabricated beam body, the first UHPC prefabricated beam body and the second UHPC prefabricated beam body The ends of the body are opposite and spaced apart from each other, the opposite ends of the first UHPC prefabricated beam body and the second UHPC prefabricated beam body are provided with notches in the upper and lower parts of the height direction, and the first UHPC prefabricated beam body is provided with notches. The opposite ends of the beam body and the second UHPC prefabricated beam body are respectively provided with trapezoidal notches in the middle part of the height direction, so that the first UHPC prefabricated beam body and the second UHPC prefabricated beam body are opposite to each other. There are rectangular spaces at intervals between the notches, the opposite notches and the rectangular spaces form a T-shaped strip, and the trapezoidal shape of the first UHPC prefabricated beam body and the second UHPC prefabricated beam body The slots are spliced with each other to form a UHPC pouring space; both the slot and the UHPC pouring space are provided with pre-embedded steel bars; the first UHPC prefabricated beam body and the second UHPC prefabricated beam body are internally provided with a lengthwise direction. longitudinal reinforcement, the longitudinal reinforcement extends into the slot and the UHPC casting space, and the longitudinal reinforcement of the first UHPC prefabricated beam body and the second UHPC prefabricated beam body is in the length direction Spacing is reserved, and the longitudinal steel bars are connected by overlapping steel bars; and UHPC blocks are poured in the T-shaped strip and the UHPC pouring space.

Further, the pre-embedded steel bars are vertical shear-resistant steel bars, and the vertical shear-resistant steel bars are arranged along the height direction.

Further, the vertical shearing steel bars are all ribbed steel bars.

Further, the reserved interval is 10-15cm.

Further, the lap length between the overlapped steel bar and the longitudinal steel bar is not less than 10 times the diameter of the overlapped steel bar.

Furthermore, shear-resisting stirrups are arranged beside the overlapping steel bars.

Further, the length of the notch along the length direction is 50-70 cm; and the length of the notch along the length direction is not less than the beam height of the first UHPC prefabricated beam body at the cutout in the height direction of the notch and half of the mean beam height of the second UHPC prefabricated beam body at the incision in the height direction of the notch.

Further, the shape of the trapezoid notch is an isosceles trapezoid, the height of the isosceles trapezoid itself is 30-50cm, and the length of the top side of the isosceles trapezoid itself is 10-30cm; The height is 10-15 cm, and the height of the T-strip is twice the height of the notch.

On the basis of the above technical solutions of the present invention, the present invention also provides a bridge, wherein the bridge has the cast-in-place wet joint structure according to any one of the above technical solutions according to the claims.

Further, the bridge is a UHPC rigid frame arch bridge.

Through the above technical solutions of the present invention, the cast-in-place wet joint structure of the present invention can achieve

(1) Longitudinal steel bars are arranged in the cast-in-place wet joint structure of the present invention, thereby improving the bending resistance of the wet joint structure, and preventing the cracks at the edge of the wet joint from extending to the inside, thereby reducing the effect of cracks on the wet joint. harm.

(2) The upper and lower parts of the cast-in-place wet joint structure of the present invention are provided with T-shaped strips, so that the length of the overlapping steel bars can meet the requirements of the specification and avoid the steel bars from fighting, which facilitates the overlapping of the steel bars, thereby making the hoisting prefabrication stage more convenient. Reduce construction difficulty.

(3) The cast-in-place wet joint structure of the present invention is symmetrical up and down, so that it can also be used in the positive and negative bending moment regions of bridges, thereby making the cast-in-place wet joint structure of the present invention more widely applicable.

(4) The cast-in-place wet joint structure of the present invention can block the shrinkage of the cast-in-place concrete, reduce the generation of shrinkage cracks, and improve the strength and service performance of the wet joint.

(5) In the cast-in-place wet joint structure of the present invention, the opposite ends of the first UHPC prefabricated beam body and the second UHPC prefabricated beam body are each provided with a trapezoidal notch in the middle part of the height direction, thereby increasing the UHPC The contact surface between the block and the side of the prefabricated beam body enhances the connection strength between the UHPC block and the first UHPC prefabricated beam body and the second UHPC prefabricated beam body, and improves the vertical shear resistance of the wet joint structure, so that the wet joint The safety and stability of the joint structure have been greatly improved.

Further, in the preferred mode of the present invention for setting longitudinal reinforcement,

(6) Longitudinal steel bars are arranged in the T-strip of the cast-in-place wet joint structure of the present invention, and the number of longitudinal steel bars can be appropriately increased according to the actual situation, thereby further improving the bending resistance of the wet joint structure.

Further, in the preferred mode of setting stirrups of the present invention,

(7) Stirrups are arranged in the cast-in-place wet joint structure of the present invention, and the stirrups can be properly densified to further improve the shear bearing capacity of the wet joint structure, thereby ensuring the connection of the lapped steel bars at the wet joint structure. Ensure construction quality at wet joint structures.

Further, in the preferred mode of the UHPC block of the present invention,

(8) In the UHPC block of the cast-in-place wet joint structure of the present invention, the bonding performance between the concrete block using UHPC and the concrete block of the prefabricated beam body is better, and the bonding strength between the concrete block and the steel bar using UHPC is better. Larger, so that the size of the wet seam can be further optimized to reduce the shrinkage creep effect. Concrete blocks using UHPC have stronger tensile strength, and are more convenient to construct, use less auxiliary steel bars and less cast-in-place, thus making the quality of the structure easier to ensure.

(9) The material of the UHPC block of the cast-in-place wet joint structure of the present invention is selected from UHPC containing 2.5% of steel fibers with end hooks, and the wet joint structure can be improved by using the advantages of high strength, good toughness and good durability of the material. strength, toughness and durability.

Other features and advantages of embodiments of the present invention will be described in detail in the detailed description section that follows.

Description of drawings

The accompanying drawings are used to provide a further understanding of the embodiments of the present invention, and constitute a part of the specification, and are used to explain the embodiments of the present invention together with the following specific embodiments, but do not constitute limitations to the embodiments of the present invention. In the attached image:

1 is a perspective view of a cast-in-place wet joint structure according to an embodiment of the present invention;

2 is a schematic front view of a cast-in-place wet joint structure according to an embodiment of the present invention;

3 is a schematic top view of a cast-in-place wet joint structure according to an embodiment of the present invention;

4 is a schematic front view of the application of a cast-in-place wet joint structure in a UHPC rigid frame bridge according to a specific embodiment of the present invention;

5 is a schematic front view of the cast-in-place wet joint structure at A in FIG. 4;

6 is a schematic front view of the cast-in-place wet joint structure at B in FIG. 4;

7 is a schematic top view of a cast-in-place wet joint structure in an arch rib of an arch bridge according to a specific embodiment of the present invention;

8 is a schematic front view of a cast-in-place wet joint structure in an arch rib of an arch bridge according to a specific embodiment of the present invention;

9 is a schematic perspective view of the application of the cast-in-place wet joint structure in a rigid frame arch bridge according to a specific embodiment of the present invention.

Description of reference numerals

1 T-strip 2 Vertical shear reinforcement

3 Trapezoidal notches 4 Stirrups

5 Lap bars 6 Longitudinal bars

7 The first UHPC prefabricated beam body 8 The second UHPC prefabricated beam body

9 notches 10UHPC pouring space

11 Rectangular space Z height direction

X length direction Y width direction

h1 height of the isosceles trapezoid itself h2 height of the T-strip

h3 The height of the notch h4 The cut of the first UHPC prefabricated beam body in the height direction of the notch

Beam height at mouth

h5 Reserved space for the second UHPC prefabricated beam body at L1 of the notch

Beam height at the cut in the height direction

L2 isosceles trapezoid itself top side length A arch rib cast-in-place UHPC wet joint

B side beam cast-in-place UHPC wet joint C arch rib joint A UHPC beam

D UHPC beam at mid-span of arch rib vault E UHPC beam at side beam end

F side beam mid-span UHPC beam G arch rib arch leg part UHPC beam

Detailed ways

The specific implementations of the embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific implementation manners described herein are only used to illustrate and explain the embodiments of the present invention, and are not used to limit the embodiments of the present invention.

Referring to Figure 1, Figure 2 and Figure 3, the cast-in-place wet joint structure of the present invention includes a first UHPC prefabricated beam body 7 and a second UHPC prefabricated beam body 8, and the first UHPC prefabricated beam body 7 and the second UHPC prefabricated beam body 7 The ends of the beam body 8 are opposite and spaced apart from each other, the opposite ends of the first UHPC prefabricated beam body 7 and the second UHPC prefabricated beam body 8 are provided with notches 9 in the upper and lower parts of the height direction Z, and the first UHPC prefabricated beam body 8 is provided with notches 9 . The opposite ends of the beam body 7 and the second UHPC prefabricated beam body 8 are each provided with a trapezoidal notch 3 in the middle part of the height direction Z, so that the opposite grooves of the first UHPC prefabricated beam body 7 and the second UHPC prefabricated beam body 8 There is a rectangular space 11 between the openings 9, the opposite notches 9 and the rectangular space 11 form a T-shaped strip 1, and the trapezoidal notches 3 of the first UHPC prefabricated beam body 7 and the second UHPC prefabricated beam body 8 are mutually spliced. The UHPC pouring space 10 is formed by butt joint; the slot 9 and the UHPC pouring space 10 are provided with embedded steel bars; the first UHPC prefabricated beam body 7 and the second UHPC prefabricated beam body 8 are provided with longitudinal steel bars 6 along the length direction X, and longitudinal steel bars 6 are arranged in the longitudinal direction X. The reinforcement bars 6 extend into the notch 9 and the UHPC pouring space 3, and the longitudinal reinforcement bars 6 of the first UHPC prefabricated beam body 7 and the second UHPC prefabricated beam body 8 have a reserved interval L1 in the length direction X, and the longitudinal reinforcement bars 6 pass through the laps. The connecting bar 5 is connected; and the UHPC block is poured in the T-strip 1 and the UHPC pouring space 10.

What needs to be specified here is that UHPC is ultra-high performance concrete, which is an ultra-high-strength cement-based material with high strength, high toughness and low porosity. The bonding performance between the concrete block using UHPC and the concrete block of the prefabricated beam body is better, and the bonding strength between the concrete block and the steel bar using UHPC is higher, so that the size of the wet joint can be further optimized, reducing the shrinkage variable effect. Concrete blocks using UHPC have stronger tensile strength, and are more convenient to construct, use less auxiliary steel bars and less cast-in-place, thus making the quality of the structure easier to ensure.

Further, the material of the concrete block of the cast-in-place wet joint structure of the present invention is selected from UHPC containing 2.5% of steel fibers with end hooks, and the wet joint can be improved by utilizing the advantages of high strength, good toughness and good durability of the material. Strength, toughness, and durability of structures.

In the above technical solution, preferably, the embedded steel bars are vertical shearing steel bars 2, the vertical shearing steel bars 2 are all arranged along the height direction Z, and the vertical shearing steel bars 2 are ribbed steel bars; 1. The vertical shear steel bar 2 can use its shear resistance to prevent the interlayer slip and dislocation of the T-strip 1, the first UHPC prefabricated beam body 7 and the second UHPC prefabricated beam body 8 under bending.

In the above technical solution, preferably, the reserved interval L1 is 10-15 cm; it can be ensured that the longitudinal reinforcement bars 6 in the trapezoidal slot 3 are not damaged during the hoisting of the first UHPC prefabricated beam body 7 and the second UHPC prefabricated beam body 8 in place. They will collide and fight with each other, which is convenient for on-site construction.

In the above technical solution, preferably, the lap length between the overlapped steel bar 5 and the longitudinal steel bar 6 is not less than 10 times the diameter of the overlapped steel bar 5, and the overlapped steel bar 5 is correspondingly arranged with shear-resistant stirrups 4. In the T-strip 1 and the UHPC pouring space 10, the stirrups 4 can be properly densified to further improve the shear bearing capacity of the wet joint structure and ensure the connection of new and old concrete at the wet joint structure.

In the above technical solution, preferably, the length of the notch 9 along the length direction X is 50-70 cm; and the length of the notch 9 along the length direction X is not less than the height direction Z of the first UHPC prefabricated beam body 7 in the notch 9 The beam height h4 at the notch and the average beam height h5 of the second UHPC prefabricated beam body 8 at the notch in the height direction Z of the notch 9 are half of the mean value;

In the above-mentioned technical solution, preferably, the shape of the trapezoid notch 3 is an isosceles trapezoid, the height h1 of the isosceles trapezoid itself is 30-50cm, and the top side length L2 of the isosceles trapezoid itself is 10-30cm; The height h3 of the T-strip 1 is 10-15 cm, and the height h2 of the T-strip 1 is twice the height h3 of the notch 9. The shape of the trapezoidal notch 3 is an isosceles trapezoid, which increases the contact surface between the UHPC block and the side of the beam, enhances the connection strength between the UHPC block in the wet joint and the beams on both sides, and improves the verticality of the wet joint. The shear resistance of the whole beam body is greatly improved. In fact, in the actual calculation, due to safety considerations, the connection strength of the joint interface can be ignored, and the bending moment and shear force are mainly borne by the steel bars.

The bridge of the present invention, including the cast-in-place wet joint structure in the above technical solutions, adopts all the technical solutions of all the above embodiments, and therefore at least has all the beneficial effects brought by the technical solutions of the above wet joint structure embodiments.

Further, the bridge is a UHPC rigid frame arch bridge.

In the above technical solution, the advantage of the cast-in-place wet joint structure of the present invention is that longitudinal steel bars are arranged in the cast-in-place wet joint structure of the present invention, thereby improving the bending resistance of the wet joint structure and preventing the wet joint. The cracks on the edge extend to the inside, thereby reducing the damage of the cracks to the wet joint; and the upper and lower parts of the cast-in-place wet joint structure of the present invention are provided with T-shaped strips, so that the length of the overlapping steel bars can meet the specification requirements and prevent the steel bars from fighting. , which facilitates the overlapping of steel bars, thereby making the hoisting prefabrication stage more convenient and reducing the difficulty of construction; and the cast-in-place wet joint structure of the present invention is symmetrical up and down, so that it can also be used in the positive and negative bending moment areas of bridges, so that the The cast-in-place wet joint structure of the present invention has a wider application range; the cast-in-place wet joint structure of the present invention can retard the shrinkage of the cast-in-place concrete, reduce the generation of shrinkage cracks, and improve the strength and service performance of the wet joint.

Referring to FIG. 4 , an embodiment of the present invention is a fully-permeable UHPC overpass arch bridge on a high speed. The vehicle overpass of the overpass adopts the top-supporting type fully transparent rigid frame arch bridge structure. The length of the upper part of the vehicle is 66m, the span of the arch rib is 58m, the sag height is 6.5m, and the sag-span ratio is f/L=6.5/58 = 1/8.9. The bridge has a full width of 5.5m and is composed of three 30cm-thick UHPC ultra-high-performance concrete prefabricated arch ribs. The center-to-center spacing of the arches is 1.75m. The arches are cast-in-place with 20cm of C50 ordinary concrete decks. The decks pass through inverted U-shaped shear keys. It forms a whole with the arch piece and bears the force jointly. A 10cm C40 concrete pavement layer is installed on the bridge deck, and the cross slope on the bridge is 1.8%, which is realized by the cast-in-place bridge deck cross slope.

In addition, it should be noted that, referring to FIG. 5 and FIG. 6 , it is the cast-in-situ UHPC wet joint A of the arch rib and the cast-in-place UHPC wet joint B of the side beam in the above-mentioned specific embodiment.

As shown in Figure 7, Figure 8 and Figure 9, the bridge connects the side beams and the arch ribs to form a rigid frame arch through UHPC rigid frame wet joints. The cast-in-place UHPC wet joint A is connected, and the edge beam and the arch rib are connected through the cast-in-place UHPC wet joint B of the edge beam. The three rigid frame arch pieces pass through the UHPC beam C at the arch rib joint A, the UHPC beam D at the mid-span of the arch rib vault, the UHPC beam E at the side beam end, the UHPC beam F at the mid-span of the side beam, and the UHPC beam at the arch rib arch leg part. The UHPC beam shown in G is connected as a whole.

An embodiment of the present invention adopts a cast-in-place wet joint with upper and lower double T-shaped strips 1 , and the main purposes have the following three points: (1) It is convenient to set up overlapping steel bars 5 . The diameter of the steel bar in the tension zone reaches 28mm. In order to realize the transmission of the force, the length of the overlapped steel bar is required to reach 15d, that is, 42cm. The design length of the cast-in-place wet joint is 30cm, which is difficult to meet the length of the steel bar. T-strip 1, to meet the requirements of lap joint reinforcement 5 setting. (2) Block the shrinkage of the cast-in-place UHPC, avoid shrinkage cracks at the interface, and avoid leakage diseases; (3) It is convenient for the hoisting of prefabricated segments, and the steel bars at the cast-in-place joints do not fight.

The construction method of the UHPC structure of an embodiment of the present invention comprises the following steps,

S1 First, complete the arch prefabrication in the prefabrication factory, complete the substructure construction on the construction site and erect temporary supports. During prefabrication, pay attention to the position and extension of the vertical shear reinforcement 2 in the T-strip 1.

S2 Then hoist all the prefabricated units on the construction site and adjust the position to accurately locate, pour the wet joint between the arch foot and the arch rib, and the beam wet joint according to the requirements. Pay attention to reserve the gap at the assembly end of the UHPC wet joint to form the joint structure of the upper and lower T-shape and the middle pouring space, and install the wet joint template.

S3 pouring, mold removal, high temperature steam curing joints, and finally removal of temporary supports.

The optional embodiments of the embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the embodiments of the present invention are not limited to the specific details of the above-mentioned embodiments. A variety of simple modifications are made to the technical solution of the invention, and these simple modifications all belong to the protection scope of the embodiments of the present invention.

In addition, it should be noted that each specific technical feature described in the above-mentioned specific implementation manner may be combined in any suitable manner under the circumstance that there is no contradiction. To avoid unnecessary repetition, various possible combinations are not further described in this embodiment of the present invention.

In addition, various implementations of the embodiments of the present invention may also be combined arbitrarily, as long as they do not violate the ideas of the embodiments of the present invention, they should also be regarded as the contents disclosed in the embodiments of the present invention.

Claims (10)

1. A cast-in-place wet joint structure, comprising a first UHPC prefabricated beam body (7) and a second UHPC prefabricated beam body (8), characterized in that the first UHPC prefabricated beam body (7) and the The ends of the second UHPC prefabricated beam body (8) are opposite and spaced apart from each other, and the opposite ends of the first UHPC prefabricated beam body (7) and the second UHPC prefabricated beam body (8) are in the height direction (Z ) are provided with notches (9) on the upper and lower parts, and the opposite ends of the first UHPC prefabricated beam body (7) and the second UHPC prefabricated beam body (8) are respectively in the height direction (Z). The middle part is provided with a trapezoidal notch (3), so that the first UHPC prefabricated beam body (7) and the second UHPC prefabricated beam body (8) are opposite to the notch (9) with an interval of rectangular shape A space (11), the opposite said notch (9) and said rectangular space (11) form a T-shaped strip (1), and said first UHPC prefabricated beam body (7) and said second UHPC prefabricated The trapezoidal notches (3) of the beam body (8) are spliced to each other to form a UHPC pouring space (10); Both the slot (9) and the UHPC pouring space (10) are provided with embedded steel bars; Longitudinal reinforcement bars (6) are arranged in the first UHPC prefabricated beam body (7) and the second UHPC prefabricated beam body (8) along the length direction (X), and the longitudinal reinforcement bars (6) extend to the grooves The mouth (9) and the UHPC pouring space (10), and the longitudinal reinforcement bars (6) of the first UHPC prefabricated beam body (7) and the second UHPC prefabricated beam body (8) are in the There is a reserved interval (L1) in the length direction (X), and the longitudinal reinforcement bars (6) are connected by overlapping reinforcement bars (5); and UHPC blocks are poured in the T-strip (1) and the UHPC pouring space (10). 2. The cast-in-place wet joint structure according to claim 1, wherein the pre-embedded steel bars are vertical shearing steel bars (2), and the vertical shearing steel bars (2) are all along the height direction (2). Z) Arrangement. 3 . The cast-in-place wet joint structure according to claim 2 , wherein the vertical shearing steel bars ( 2 ) are ribbed steel bars. 4 . 4. The cast-in-place wet joint structure according to claim 1, wherein the reserved interval (L1) is 10-15 cm. 5. The cast-in-place wet joint structure according to claim 1, characterized in that, the lap length between the overlapped steel bars (5) and the longitudinal steel bars (6) is not less than the overlapped steel bars ( 5) 10 times the diameter. 6 . The cast-in-place wet joint structure according to claim 5 , characterized in that, the lap steel bars ( 5 ) are correspondingly arranged with stirrups ( 4 ) for shear resistance. 7 . 7. The cast-in-place wet joint structure according to claim 1, characterized in that, the length of the notch (9) along the length direction (X) is 50-70 cm; and the notch (9) is along the length The length in the direction (X) is not less than the beam height (h4) of the first UHPC prefabricated beam body (7) at the incision in the height direction (Z) of the notch (9) and the second UHPC prefabricated beam body (8) Half of the mean value of the beam height (h5) at the cut in the height direction (Z) of the notch (9). 8. The cast-in-place wet joint structure according to any one of claims 1 to 7, wherein the trapezoidal notch (3) is in the shape of an isosceles trapezoid, and the height of the isosceles trapezoid itself (h1 ) is 30-50cm, and the top side length (L2) of the isosceles trapezoid itself is 10-30cm; the height (h3) of the notch (9) is 10-15cm, and the T-shaped strip The height (h2) of (1) is twice the height (h3) of said notch (9). 9. A bridge, characterized in that the bridge comprises the cast-in-place wet joint structure according to any one of claims 1 to 8. 10. The bridge according to claim 9, wherein the bridge is a UHPC rigid frame arch bridge.

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