A structure and method for improving the crack resistance of bridge deck of a simply supported and then continuous bridge

Abstract

The present invention discloses a structure and method for improving the crack resistance of a bridge deck that is first simply supported and then continuous, the structure comprising: a bridge pier; a precast beam, the precast beam being erected on the pier; a cast-in-place concrete bridge deck, the cast-in-place concrete bridge deck being cast and formed on the precast beam, the cast-in-place concrete bridge deck being embedded with bridge deck reinforcement extending in the longitudinal direction; an isolator, the isolator being embedded in the cast-in-place concrete bridge deck and wrapped on the outside of the bridge deck reinforcement, the isolator being located directly above the pier, wherein the elastic modulus of the isolator is lower than the elastic modulus of the concrete of the cast-in-place concrete bridge deck; a bridge deck pavement layer, the bridge deck pavement layer being laid on the cast-in-place concrete bridge deck. The structure for improving the crack resistance of a bridge deck that is first simply supported and then continuous according to the embodiment of the present invention can effectively improve the crack resistance of a bridge deck that is first simply supported and then continuous.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge engineering, and in particular to a structure for improving the crack resistance of a bridge deck of a simply supported and then continuous bridge and a construction method thereof. Background Art

[0002] In order to improve driving comfort, bridges are required to have good mechanical properties and fewer expansion joints to achieve better smoothness. Therefore, the "first simple support then continuous" bridge structure and its supporting construction methods have been widely used. In the traditional bridge deck structure of first simple support then continuous bridge, the tensile stress in the tensile zone of the concrete bridge deck is difficult to control, and the concrete bridge deck has poor crack resistance and is prone to cracking. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to propose a structure for improving the crack resistance of a bridge deck of a first simply supported and then continuous bridge, wherein the cast-in-place concrete bridge deck of the structure for improving the crack resistance of a bridge deck of a first simply supported and then continuous bridge has good crack resistance and is not easy to crack.

[0004] The present invention also proposes a construction method for a structure for improving the crack resistance of a bridge deck that is first simply supported and then continuous.

[0005] According to the first aspect of the present invention, a structure for improving the crack resistance of a bridge deck that is simply supported and then continuous comprises: a bridge pier; a precast beam, the precast beam being erected on the bridge pier; a cast-in-place concrete bridge deck, the cast-in-place concrete bridge deck being cast and formed on the precast beam, the cast-in-place concrete bridge deck being embedded with bridge deck steel bars extending in the longitudinal direction; an isolator, the isolator being embedded in the cast-in-place concrete bridge deck and wrapped around the outside of the bridge deck steel bars, the isolator being located directly above the pier, wherein the elastic modulus of the isolator is lower than the elastic modulus of concrete of the cast-in-place concrete bridge deck; and a bridge deck pavement layer, the bridge deck pavement layer being laid on the cast-in-place concrete bridge deck.

[0006] According to the structure for improving the crack resistance of the bridge deck of a simply-supported-then-continuous bridge according to the embodiment of the present invention, the cast-in-place concrete bridge deck has good crack resistance and is not prone to cracking.

[0007] In addition, the structure for improving the crack resistance of the bridge deck of a simply supported and then continuous bridge according to the embodiment of the present invention may also have the following additional technical features:

[0008] According to one embodiment of the present invention, the vertical center line of the isolation element overlaps with the vertical center line of the bridge pier, and the longitudinal length of the isolation element is not less than the longitudinal length of the bridge pier.

[0009] According to an embodiment of the present invention, the isolation member is a rubber member or a polyethylene plastic member.

[0010] According to one embodiment of the present invention, the cast-in-place concrete bridge deck comprises a first cast-in-place concrete bridge deck section and a second cast-in-place concrete bridge deck section arranged on both sides of the first cast-in-place concrete bridge deck section, the isolation member is embedded in the first cast-in-place concrete bridge deck section, and the tensile strength of the concrete of the first cast-in-place concrete bridge deck section is higher than the tensile strength of the concrete of the second cast-in-place concrete bridge deck section.

[0011] According to one embodiment of the present invention, the first cast-in-place concrete bridge deck segment is formed by casting ECC concrete or by casting UHPC concrete.

[0012] According to one embodiment of the present invention, the isolation member is constructed as a sleeve, an opening is arranged on the tube wall of the sleeve, the opening extends along the axial direction of the sleeve and penetrates the sleeve in the axial direction, and the sleeve is suitable for being buckled on the outer side of the bridge deck steel bar through the opening.

[0013] According to one embodiment of the present invention, the isolation member includes a first sub-isolator and a second sub-isolator formed in an arc shape, the first sub-isolator and the second sub-isolator are both arranged on the outside of the bridge deck steel bars, and the first sub-isolator and the second sub-isolator are connected to form a sleeve.

[0014] According to an embodiment of the present invention, the spacer is formed as a flexible membrane, and the flexible membrane is wrapped around the outside of the bridge deck reinforcement.

[0015] According to a second aspect of the present invention, a construction method for improving the crack resistance of a bridge deck of a bridge that is simply supported first and then continuous is used to construct a structure for improving the crack resistance of a bridge deck of a bridge that is simply supported first and then continuous according to the first aspect of the present invention. The construction method comprises the following steps:

[0016] S01: erecting the prefabricated beam on the bridge pier;

[0017] S02: erecting the bridge deck reinforcement and a formwork for casting the cast-in-place concrete bridge deck on the precast beam, wrapping the isolation piece on the outside of the bridge deck reinforcement, and then pouring concrete to form the cast-in-place concrete bridge deck;

[0018] S03: Laying the bridge deck pavement layer on the cast-in-place concrete bridge deck.

[0019] According to the construction method of the structure for improving the crack resistance of the bridge deck of a simply supported and then continuous bridge according to the embodiment of the present invention, the cast-in-place concrete bridge deck of the structure for improving the crack resistance of the bridge deck of a simply supported and then continuous bridge formed by the construction method has good crack resistance in the tensile zone.

[0020] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present invention will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a schematic structural diagram of a structure for improving the crack resistance of a bridge deck of a simply supported and then continuous bridge according to an embodiment of the present invention;

[0023] Figure 2 yes Figure 1 The cross-sectional view along line AA of the structure shown in FIG. 1 is used to improve the crack resistance of the bridge deck of a simply supported and then continuous bridge.

[0024] Reference numerals:

[0025] Structure 100 to improve the crack resistance of bridge decks of simply supported and then continuous bridges;

[0026] Pier 1;

[0027] Precast beam 2; first precast concrete beam 21; second precast concrete beam 22; cast-in-place concrete joint section 23;

[0028] Cast-in-place concrete bridge deck 3; bridge deck reinforcement 31;

[0029] Isolation member 4;

[0030] Bridge deck pavement layer 5. DETAILED DESCRIPTION

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] Reference below Figure 1-Figure 2 A structure 100 for improving the crack resistance of a bridge deck of a simply-supported-then-continuous bridge according to an embodiment of the first aspect of the present invention is described.

[0033] refer to Figure 1-Figure 2As shown, the structure 100 for improving the crack resistance of the bridge deck of a simply supported and then continuous bridge according to an embodiment of the present invention includes: a pier 1, a prefabricated beam 2, a cast-in-place concrete bridge deck 3, an isolation member 4 and a bridge deck pavement layer 5.

[0034] The precast beam 2 is erected on the bridge pier 1, and the cast-in-place concrete bridge deck 3 is cast on the precast beam 2. The cast-in-place concrete bridge deck 3 is embedded with a longitudinal (such as Figure 1 The bridge deck reinforcement 31 extends in the left and right directions (as shown in the figure), the isolation member 4 is embedded in the cast-in-place concrete bridge deck 3 and wrapped around the outside of the bridge deck reinforcement 31, the isolation member 4 is located directly above the pier 1, wherein the elastic modulus of the isolation member 4 is lower than the elastic modulus of the concrete of the cast-in-place concrete bridge deck 3, and the bridge deck pavement layer 5 is laid on the cast-in-place concrete bridge deck 3.

[0035] By wrapping the isolation piece 4 on the outside of the bridge deck reinforcement 31, and the isolation piece 4 is located directly above the bridge pier 1, the bonding effect at the connection interface between the isolation piece 4 and the cast-in-place concrete bridge deck 3 is destroyed, and the bonding effect between the bridge deck reinforcement 31 and the concrete is locally released at the key position, and the tensile force that should be borne by the concrete and the bridge deck reinforcement 31 is transferred to the bridge deck reinforcement 31, thereby greatly reducing the tensile stress of the cast-in-place concrete bridge deck 3, thereby improving the crack resistance of the cast-in-place concrete bridge deck 3.

[0036] Among them, the isolation member 4 is low-priced, suitable for mass production in factories, and does not require additional processes during the construction phase. It only needs to be fastened to the bridge deck reinforcement 31, which makes it easy to ensure the quality of the project.

[0037] According to the embodiment of the present invention, the structure 100 for improving the crack resistance of the bridge deck of a simply supported and then continuous bridge, through the new ideas of "combining resistance and release" and "making the best use of everything", partially releases the bonding effect between the bridge deck steel bars 31 and the cast-in-place concrete bridge deck 3 to reduce the tensile stress of the cast-in-place concrete bridge deck 3, thereby improving the crack resistance of the tensile zone of the cast-in-place concrete bridge deck 3 of the structure 100 for improving the crack resistance of the bridge deck of a simply supported and then continuous bridge, and is easy to construct and has significant technical and economic benefits.

[0038] In one embodiment of the present invention, Figure 1 As shown in the figure, the vertical center line of the isolation member 4 overlaps with the vertical center line of the pier 1, and the longitudinal length of the isolation member 4 is not less than the longitudinal length of the pier 1, thereby better improving the crack resistance of the tensile zone of the cast-in-place concrete bridge deck 3 of the structure 100 that improves the crack resistance of the bridge deck of a simply supported and then continuous bridge.

[0039] In an optional embodiment of the present invention, the isolation member 4 is a rubber member, that is, the isolation member 4 is made of a rubber material, and the elastic modulus of the rubber material is much lower than that of the concrete material.

[0040] In another optional embodiment of the present invention, the isolation member 4 is a polyethylene plastic member, that is, the isolation member 4 is made of polyethylene plastic material, and the elastic modulus of the polyethylene plastic material is much lower than that of the concrete material.

[0041] In one embodiment of the present invention, the spacer 4 is configured as a sleeve, an opening is provided on the tube wall of the sleeve, the opening extends along the axial direction of the sleeve and penetrates the sleeve in the axial direction, and the sleeve is suitable for being buckled on the outside of the bridge deck reinforcement 31 through the opening. Therefore, the spacer 4 has a simple structure and is convenient for installing the spacer 4 on the outside of the bridge deck reinforcement 31.

[0042] In one embodiment of the present invention, the spacer 4 includes a first sub-spacer and a second sub-spacer formed in an arc shape, the first sub-spacer and the second sub-spacer are both arranged outside the bridge deck reinforcement 31, and the first sub-spacer and the second sub-spacer are connected to form a sleeve. Therefore, the spacer 4 has a simple structure and is convenient to install the spacer 4 on the outside of the bridge deck reinforcement 31.

[0043] In one embodiment of the present invention, the spacer 4 is formed as a flexible membrane, and the flexible membrane is wrapped around the outside of the bridge deck reinforcement 31. Therefore, the spacer 4 has a simple structure and is convenient to install the spacer 4 on the outside of the bridge deck reinforcement 31.

[0044] In one embodiment of the present invention, the cast-in-place concrete bridge deck 3 includes a first cast-in-place concrete bridge deck section and a second cast-in-place concrete bridge deck section arranged on both sides of the first cast-in-place concrete bridge deck section, the isolation member 4 is embedded in the first cast-in-place concrete bridge deck section, and the tensile strength of the concrete of the first cast-in-place concrete bridge deck section is higher than the tensile strength of the concrete of the second cast-in-place concrete bridge deck section. The first cast-in-place concrete bridge deck section can be formed by casting high-performance concrete, and the second cast-in-place concrete bridge deck section can be formed by casting ordinary concrete. In this way, the crack resistance of the tensile zone of the cast-in-place concrete bridge deck 3 can be further improved while ensuring that the cost is not too high. Optionally, the first cast-in-place concrete bridge deck section is formed by casting ECC concrete or by casting UHPC concrete.

[0045] The precast beam 2 may include only one precast concrete beam, which is installed on the pier 1. The precast beam 2 may also include two precast concrete beams, for example, Figure 1In the specific example shown, the precast beam 2 includes a first precast concrete beam 21, a second precast concrete beam 22, a cast-in-place concrete joint section 23 and a joint section sleeve (not shown in the figure), the first precast concrete beam 21 and the second precast concrete beam 22 both extend in the longitudinal direction, and the first precast concrete beam 21 and the second precast concrete beam 22 are arranged spaced apart in the longitudinal direction, the first precast concrete beam 21 and the second precast concrete beam 22 are both mounted on the pier 1 at one end adjacent to each other, and the first precast concrete beam 21 is provided with a first precast concrete joint section 23 in the tension zone. The first stress-bearing steel bar (not shown in the figure) is provided with a first stress-bearing steel bar (not shown in the figure), one end of the first stress-bearing steel bar adjacent to the second precast concrete beam 22 extends out of the end of the first precast concrete beam 21 to form a first stress-bearing steel bar extension section, and the second precast concrete beam 22 is provided with a second stress-bearing steel bar (not shown in the figure) in the tension zone, and one end of the second stress-bearing steel bar adjacent to the first precast concrete beam 21 extends out of the end of the second precast concrete beam 22 to form a second stress-bearing steel bar extension section, and the first stress-bearing steel bar extension section is connected to the second stress-bearing steel bar extension section to form a multi-span simply supported stress-bearing system. The cast-in-place concrete joint section 23 is provided on the pier 1 and cast between the first precast concrete beam 21 and the second precast concrete beam 22, and the joint section sleeve is wrapped around the outside of the first stress-bearing steel bar extension section and the second stress-bearing steel bar extension section, and the first stress-bearing steel bar extension section, the second stress-bearing steel bar extension section and the joint section sleeve are embedded in the cast-in-place concrete joint section 23, wherein the elastic modulus of the joint section sleeve is lower than the elastic modulus of the concrete of the cast-in-place concrete joint section 23.

[0046] The cast-in-place concrete joint section 23 serves to connect the first precast concrete beam 21 and the second precast concrete beam 22, thereby realizing the system conversion from simple support to continuous support. By including a joint section sleeve on the outside of the first stress-bearing steel bar extension section and the second stress-bearing steel bar extension section, the bonding effect of the connection interface between the first stress-bearing steel bar extension section and the second stress-bearing steel bar extension section and the cast-in-place concrete joint section 23 can be destroyed. By partially releasing the bonding between the steel bar and the concrete at a key position, the tensile force that should be borne by the concrete and the steel bar is transferred to the steel bar, which greatly reduces the tensile stress of the cast-in-place concrete joint section 23 in the negative bending moment zone and improves the crack resistance of the tensile zone of the cast-in-place concrete joint section 23.

[0047] Among them, the combination section sleeve is low in price, suitable for factory mass production, and does not require additional processes during the construction phase. It only needs to be buckled on the tensile steel bars of the cast-in-place concrete combination section 23, which makes it easy to ensure the quality of the project.

[0048] Through the new ideas of "combining resistance and release" and "making the best use of resources", the bonding force between the steel bars in the tension zone and the cast-in-place concrete bonding section 23 is partially released to reduce the tensile stress in the concrete of the cast-in-place concrete bonding section 23, thereby improving the crack resistance of the tension zone of the cast-in-place concrete bonding section 23, and the construction is convenient and low-cost.

[0049] In an optional embodiment of the present invention, the connecting section sleeve is a rubber member, that is, the connecting section sleeve is manufactured from a rubber material, and the elastic modulus of the rubber material is much lower than that of the concrete material.

[0050] In another optional embodiment of the present invention, the connecting section sleeve is a polyethylene plastic part, that is, the connecting section sleeve is made of polyethylene plastic material, and the elastic modulus of the polyethylene plastic material is much lower than that of the concrete material.

[0051] Preferably, the cast-in-place concrete joint section 23 is formed by casting high-performance concrete, which refers to concrete with higher tensile strength than ordinary concrete. For example, the cast-in-place concrete joint section 23 is formed by casting ECC concrete or the cast-in-place concrete joint section 23 is formed by casting UHPC concrete. By casting the cast-in-place concrete joint section 23 by using high-performance concrete, the tensile performance of the cast-in-place concrete joint section 23 can be further improved.

[0052] According to the second aspect of the present invention, a construction method for a structure 100 for improving the crack resistance of a bridge deck that is simply supported first and then continuous is used to construct a structure 100 for improving the crack resistance of a bridge deck that is simply supported first and then continuous according to the first aspect of the present invention. The construction method comprises the following steps:

[0053] S01: erecting the precast beam 2 on the pier 1;

[0054] S02: erecting bridge deck reinforcement 31 and a formwork for casting a cast-in-place concrete bridge deck 3 on the precast beam 2, wrapping the isolation piece 4 on the outside of the bridge deck reinforcement 31, and then pouring concrete to form a cast-in-place concrete bridge deck 3;

[0055] S03: Laying a bridge deck pavement layer 5 on the cast-in-place concrete bridge deck 3.

[0056] According to the construction method of the structure 100 for improving the crack resistance of the bridge deck of a simply supported and then continuous bridge according to an embodiment of the present invention, the cast-in-place concrete bridge deck 3 of the structure 100 for improving the crack resistance of the bridge deck of a simply supported and then continuous bridge formed by the construction method has good crack resistance in the tensile zone.

[0057] Further, when the precast beam 2 includes the first precast concrete beam 21 and the second precast concrete beam 22 in the above embodiment, step S01 specifically includes the following steps:

[0058] S011: erecting the first precast concrete beam 21 and the second precast concrete beam 22 on the pier 1;

[0059] S012: Connect the first stress-bearing steel bar extension section and the second stress-bearing steel bar extension section together to form a multi-span simply supported stress-bearing system;

[0060] S013: Wrapping a connecting section sleeve outside the first stressed steel bar extension section and the second stressed steel bar extension section to destroy the bonding effect of the connecting interface between the steel bar and the cast-in-place concrete connecting section 23;

[0061] S014: A template for casting a cast-in-place concrete joint section 23 is installed between the first precast concrete beam 21 and the second precast concrete beam 22, and concrete is cast to form the cast-in-place concrete joint section 23, completing the system conversion from simple support to continuous support.

[0062] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0063] In the description of the present invention, “plurality” means two or more than two, unless otherwise clearly and specifically defined.

[0064] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0065] In the description of the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0066] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0067] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A structure for improving the crack resistance of a bridge deck that is simply supported and then continuous, characterized in that: include: bridge piers; Prefabricated beams, the prefabricated beams being erected on the bridge piers; A cast-in-place concrete bridge deck, wherein the cast-in-place concrete bridge deck is cast on the precast beam, and a bridge deck reinforcement extending in the longitudinal direction is embedded in the cast-in-place concrete bridge deck; an isolator, the isolator is embedded in the cast-in-place concrete bridge deck and wrapped around the outside of the bridge deck reinforcement, the isolator is located directly above the bridge pier, wherein the elastic modulus of the isolator is lower than the elastic modulus of the concrete of the cast-in-place concrete bridge deck; the isolator comprises a first sub-isolator and a second sub-isolator formed in an arc shape, the first sub-isolator and the second sub-isolator are both arranged on the outside of the bridge deck reinforcement, and the first sub-isolator and the second sub-isolator are connected to form a sleeve by splicing; A bridge deck pavement layer, wherein the bridge deck pavement layer is laid on the cast-in-place concrete bridge deck; The precast beam comprises a first precast concrete beam, a second precast concrete beam, a cast-in-place concrete joint section and a joint section sleeve, the first precast concrete beam and the second precast concrete beam both extend in the longitudinal direction, and the first precast concrete beam and the second precast concrete beam are arranged spaced apart in the longitudinal direction, and the ends of the first precast concrete beam and the second precast concrete beam adjacent to each other are both erected on the bridge pier; The cast-in-place concrete joint section is provided on the pier and is cast between the first precast concrete beam and the second precast concrete beam; The elastic modulus of the coupling section sleeve is lower than the elastic modulus of the concrete of the cast-in-place concrete coupling section; The vertical centerline of the isolation member overlaps with the vertical centerline of the pier, and the longitudinal length of the isolation member is not less than the longitudinal length of the pier; The isolating piece is a rubber piece or a polyethylene plastic piece.

2. The structure for improving the crack resistance of the bridge deck of a simply supported and then continuous bridge according to claim 1 is characterized in that: The cast-in-place concrete bridge deck comprises a first cast-in-place concrete bridge deck section and a second cast-in-place concrete bridge deck section arranged on both sides of the first cast-in-place concrete bridge deck section, the isolation member is embedded in the first cast-in-place concrete bridge deck section, and the tensile strength of the concrete of the first cast-in-place concrete bridge deck section is higher than the tensile strength of the concrete of the second cast-in-place concrete bridge deck section.

3. The structure for improving the crack resistance of the bridge deck of a simply supported and then continuous bridge according to claim 2 is characterized in that: The first cast-in-place concrete bridge deck section is formed by casting ECC concrete or by casting UHPC concrete.

4. The structure for improving the crack resistance of the bridge deck of a simply supported and then continuous bridge according to claim 1 is characterized in that: The spacer is formed as a flexible membrane that is wrapped around the outside of the bridge deck reinforcement.

5. A construction method for improving the crack resistance of a bridge deck that is simply supported and then continuous, characterized in that: The structure for improving the crack resistance of the bridge deck of a bridge that is simply supported first and then continuous is the structure for improving the crack resistance of the bridge deck of a bridge that is simply supported first and then continuous according to any one of claims 1 to 4, and the construction method comprises the following steps: S01: erecting the prefabricated beam on the bridge pier; S02: erecting the bridge deck reinforcement and a formwork for casting the cast-in-place concrete bridge deck on the precast beam, wrapping the isolation piece on the outside of the bridge deck reinforcement, and then pouring concrete to form the cast-in-place concrete bridge deck; S03: Laying the bridge deck pavement layer on the cast-in-place concrete bridge deck.

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