Wet joint structure between bridge pier, pile cap and pile foundation and construction process thereof

Abstract

This invention provides a wet joint structure and construction process for bridge piers, abutments, and pile foundations, including multiple pile foundations, abutments, and piers; multiple pile foundations are embedded in the soil and spaced apart; the abutment is set on the soil; the pier is set on the upper surface of the abutment; the bottom surface of the abutment and the top of the pile foundation, and the top of the abutment and the bottom of the pier are fixedly connected by connectors; the connectors include male connectors and female connectors. This wet joint structure and construction process for bridge piers, abutments, and pile foundations allows for rapid connection of pile foundations, abutments, and piers through the connection between the male and female connectors, enabling the abutments and piers to be prefabricated in the factory, reducing on-site construction time. The prefabrication of the male and female connectors in the factory ensures controllable connector strength, reduces the use of reinforcing steel, and reduces reliance on the experience of on-site workers during construction.

Description

Technical Field

[0001] This invention relates to bridge construction, and in particular to the wet joint structure and construction process between bridge piers, abutments and pile foundations. Background Technology

[0002] Bridge construction refers to the entire process of planning, designing, constructing, and maintaining a series of structures to cross natural or man-made obstacles such as rivers, valleys, roads, and railways.

[0003] Bridge construction involves many processes, and the choice of process depends on the bridge type, span, terrain, cost, and construction period. Bridge construction is generally divided into substructure construction and superstructure construction. Superstructure construction generally uses cast-in-place method and prefabrication method.

[0004] The construction of the substructure of a bridge includes pile foundation construction, abutment and bridge pier construction. Pile foundation construction involves drilling holes with a rotary drilling rig, inserting a steel cage, and then pouring concrete to form piles. Abutments are generally constructed by pouring a large concrete slab between the piles to connect the piles into a whole to distribute the load. Bridge piers are generally constructed on-site by tying steel bars and setting up formwork.

[0005] Existing technologies require on-site reinforcement binding, formwork erection, and concrete pouring. Much of the work is carried out at heights and near water, the quality depends on worker skills, concrete curing conditions are poor, and the construction time is relatively long. Summary of the Invention

[0006] To address the problems of existing technologies requiring on-site reinforcement binding, formwork erection, and concrete pouring, with a large amount of work carried out at high altitudes and near water, this invention proposes a wet joint structure and its construction process between bridge piers, abutments, and pile foundations.

[0007] The technical solution of this invention includes multiple pile foundations, pile caps, and bridge piers; Multiple pile foundations are embedded in the soil, and the multiple pile foundations are set at intervals; The foundation is set on the soil; The piers are located on the upper surface of the abutment; The bottom surface of the pier cap and the top of the pile foundation, as well as the top of the pier cap and the bottom of the pier, are fixedly connected by connectors. The connector includes a male connector and a female connector. The male connector has a socket, and a sleeve is fixedly connected to the bottom of the female connector. The socket is used to insert into the sleeve. An injection tube is fixedly connected to the bottom of the female connector. The injection tube is located inside the sleeve and is connected to an external injection device.

[0008] Preferably, a material conveying pipe is embedded inside the connecting female head, and an injection port is provided on the material conveying pipe, with the injection port located outside the connecting female head; The injection pipe extends vertically and enters the interior of the connecting female head; the injection pipe is connected to the conveying pipe. The sleeve has multiple seepage holes.

[0009] Preferably, the bottom of the pier and the bottom of the abutment are both fixedly connected to the connecting female head.

[0010] Preferably, the bottom of the female connector has key teeth, and the top of the male connector has tooth grooves, with the key teeth engaging with the tooth grooves. Preferably, the tooth groove is an inverted trapezoidal structure with an upper opening, and the key teeth are adapted to the shape of the tooth groove.

[0011] Preferably, connecting plates are fixedly installed between the tops of the plurality of pile foundations and on the top of the pile cap, and a second pre-embedded steel bar is fixedly connected to the bottom of the connecting plate; The connecting plate has a connecting hole, and the male connector has a socket hole. A connecting screw is inserted into the socket hole and is threadedly connected to the connecting hole.

[0012] Preferably, it includes the following steps: Step S: Excavate pile holes, pour concrete to form pile foundations, and install connecting plates; Step S: The male connector is hoisted onto the pile foundation and installed to the top of the pile foundation via the connecting plate; Step S: Hoist the pile cap above the pile foundation to connect the female connector to the male connector; Step S: Grouting between the male connector and the female connector; Step S: Connect the male connector, hoist it onto the bearing platform, and install it onto the top of the bearing platform via the connecting plate; Step S: Hoist the pier above the abutment and connect the female connector to the male connector; Step S: Repeat step S.

[0013] Preferably, the grouting method in S is to input grout into the delivery pipe, the delivery pipe delivers the grout into the injection pipe, the injection pipe fills the sleeve, the grout in the sleeve seeps out from the seepage hole, and the seeping grout fills the gap between the inner wall of the sleeve and the socket. After the gap between the sleeve and the inner wall of the socket is filled, the slurry overflows from the top of the socket until the gap between the male and female heads is filled.

[0014] Preferably, a gap is left between the bottom of the infusion tube and the bottom wall of the insertion port.

[0015] Preferably, in step S, after the male connector is connected to the connecting plate, a base coat is laid on the top of the male connector.

[0016] Advantages of this invention: 1. By connecting the male and female connectors, pile foundations, pile caps, and piers can be quickly connected, allowing the pile caps and piers to be prefabricated in the factory, reducing on-site construction time.

[0017] 2. The male and female connectors are prefabricated in the factory, which allows for controllable strength of the connectors, reduces the use of steel reinforcement, and reduces reliance on the experience of on-site workers during construction.

[0018] 3. The mechanical interlocking strength between the male and female connectors can be verified in advance, thus making the strength controllable and avoiding the situation where the strength is difficult to monitor and control after traditional wet joints or rebar binding construction.

[0019] 4. By assembling the components, the concrete curing time is reduced, and the construction speed is accelerated. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the main structure of Example 1; Figure 2 This is a schematic diagram of the connection structure of the male and female connectors in Embodiment 1; Figure 3 This is an exploded view of the connector structure in Example 1; Figure 4 This is a schematic diagram of the front structure of the connector in Embodiment 1.

[0022] In the diagram, 1 is the pile foundation, 2 is the connecting plate, 3 is the male connector, 4 is the female connector, 5 is the pile cap, 6 is the bridge pier, 7 is the first embedded steel bar, 8 is the key, 9 is the tooth groove, 10 is the sleeve, 11 is the socket, 12 is the seepage hole, 13 is the connecting bolt, 14 is the connecting hole, 15 is the second embedded steel bar, 16 is the material conveying pipe, and 17 is the grouting pipe. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1: This example aims to propose a wet joint structure and its construction process between bridge piers, abutments and pile foundations.

[0025] according to Figures 1-4 As shown, it includes multiple pile foundations (1), pile caps (5) and piers (6).

[0026] Multiple pile foundations (1) are buried in the soil. Specifically, pile holes are excavated, steel cages are suspended in the pile holes, and then concrete is poured to form piles. The pouring method is the existing concrete pouring pile technology. Multiple pile foundations (1) are set at intervals.

[0027] The tops of multiple pile foundations (1) are connected by a connecting plate (2). Specifically, the bottom of the connecting plate (2) is fixedly connected with a second pre-embedded steel bar (15). During the pouring of the pile foundation (1), the second pre-embedded steel bar (15) is pre-embedded into the top of the pile foundation (1). After the concrete strength of the pile foundation (1) is formed, the tops of the pile foundation (1) are connected as one unit through the connecting plate (2).

[0028] The top of the pile foundation (1) is flush with the surface of the soil, the pile cap (5) is set on the soil, and a connector is set between the pile cap (5) and the pile foundation (1).

[0029] The pier (6) is located above the pier cap (5), and there are also connecting parts between the pier (6) and the pier cap (5).

[0030] The connector includes a male connector (3) and a female connector (4). The male connector (3) has a socket (11) and the bottom of the female connector (4) is fixedly connected to a sleeve (10). The socket (11) is used to insert into the sleeve (10).

[0031] The connecting female head (4) is fixedly installed at the bottom of the foundation (5). Multiple first embedded steel bars (7) are fixedly connected to the top of the connecting female head (4). The multiple first embedded steel bars (7) are spaced apart. The installation method is to embed the first embedded steel bars (7) into the foundation (5) when the foundation (5) is prefabricated in the factory. At the same time, the connecting plate (2) is also installed on the top of the foundation (5) by embedding the second embedded steel bar (15) into the foundation (5). After the concrete is formed, the connecting plate (2) and the connecting female head (4) are both fixedly installed on the foundation (5).

[0032] The connecting female (4) is installed to the bottom of the bridge pier (6) in the same manner as described above. A connecting hole (14) is provided on the connecting plate (2), and a socket hole is provided on the connecting male (3). A connecting screw (13) is inserted into the socket hole. The connecting screw (13) is threadedly connected to the connecting hole (14). The connecting male (3) is installed on the connecting plate (2) in this way.

[0033] A material conveying pipe (16) is embedded inside the connecting female head (4). The material conveying pipe (16) is provided with an injection port, which is located outside the connecting female head (4). The injection pipe (17) extends vertically and enters the interior of the connecting female head (4). The injection pipe (17) is connected to the material conveying pipe (16). Multiple seepage holes (12) are opened on the sleeve (10).

[0034] The conveying pipe (16) is equipped with a feed inlet. The slurry is injected into the conveying pipe (16) by a slurry pump. The slurry is a composite slurry in the prior art, which is made of cement, silica fume, quartz sand and chemical additives.

[0035] The bottom of the connecting head (4) is fixedly connected with an injection tube (17). There are multiple injection tubes (17), and each injection tube (17) corresponds to a sleeve (10). The injection tube (17) is located inside the sleeve (10).

[0036] The bottom of the female connector (4) is provided with key teeth (8), which are arranged in an array at intervals. The top of the male connector (3) is provided with a tooth groove (9), which corresponds to the position of the tooth groove (8) and the tooth groove (9). The tooth groove (9) meshes with the tooth groove (9). The tooth groove (9) is an inverted trapezoidal structure with an upper opening. The shape of the tooth groove (9) matches the shape of the tooth groove (8), so that the tooth groove (8) is automatically aligned when inserted.

[0037] Construction process: S1 excavates pile holes and pours concrete to form pile foundation (1). The connecting plate (2) is connected to the top of the pile foundation (1) through the second pre-embedded steel bar (15). The pile foundation (1) is formed and fixedly connected to the connecting plate (2).

[0038] The male connector (3) of S2 is hoisted above the connecting plate (2) and connected to the connecting plate (2) through the connecting screw (13). After the male connector (3) is connected to the connecting plate (2), the top of the male connector (3) is covered with grout. In this embodiment, the grout is a mixed material in the prior art.

[0039] S3 hoists the pile cap (5) above the pile foundation (1) so that the sleeve (10) on the female connector (4) is inserted into the socket (11) on the male connector (3) below.

[0040] S4 grouts the gap between the male head (3) and the female head (4). The grouting method in S4 is to input grout into the conveying pipe (16), and the conveying pipe (16) delivers the grout into the injection pipe (17). The injection pipe (17) fills the sleeve (10). The grout in the sleeve (10) seeps out from the seepage hole (12). The seeping grout fills the gap between the inner wall of the sleeve (10) and the socket (11). After the gap between the inner wall of the sleeve (10) and the socket (11) is filled, the grout overflows from the top of the socket (11) until the gap between the male head (3) and the female head (4) is filled.

[0041] A gap is left between the bottom of the injection tube (17) and the bottom wall of the socket (11).

[0042] S5 repeats S2.

[0043] S6 hoisted the pier (6) above the abutment (5) and inserted the sleeve (10) on the female connector (4) into the socket (11) on the male connector (3) below.

[0044] S7 repeats S4.

[0045] Construction principle: First, the pile hole is excavated, then the pile foundation steel cage is hoisted into the pile hole, and then concrete is poured to form multiple pile foundations (1) and the connecting plate (2) is placed above the pile foundation (1), so that the second pre-embedded steel bar (15) on the pile foundation (1) is embedded at the top of the pile foundation (1), and then wait for the concrete strength to be formed.

[0046] The top of the connecting plate (2) is covered with grout, and the grout used in this embodiment is based on existing technology.

[0047] Further, the male connector (3) is installed on top of the connecting plate (2), and then the connecting screw (13) is inserted into the socket hole in sequence. Then the connecting screw (13) is rotated so that the lower end of the connecting screw (13) is threadedly connected to the connecting hole (14).

[0048] Then, apply the mortar to the top of the male connector (3).

[0049] Furthermore, the base (5) is hoisted above the male connector (3), so that the sleeve (10) on the female connector (4) on the base (5) is inserted into the socket (11), and the female connector (4) is pressed onto the male connector (3). Then, the slurry is injected into the delivery pipe (16) through the slurry pump, and the slurry is injected into the injection pipe (17) through the delivery pipe (16). The slurry fills the sleeve (10) and overflows from the top of the socket (11), filling the gap between the female connector (4) and the male connector (3).

[0050] Waiting for the slurry to reach the required strength.

[0051] Furthermore, the male connector (3) is installed on top of the base plate (5).

[0052] Furthermore, the pier (6) is hoisted above the abutment (5) and connected by the above-mentioned male connector (3) and female connector (4).

[0053] Furthermore, grouting is performed on the female connector (4) on the pier (6) in the above manner, so that the gap between the female connector (4) and the male connector (3) is filled with grout.

[0054] Thus, the pile foundation (1), the pile cap (5) and the bridge pier (6) can be quickly connected by connecting the male head (3) and the female head (4), so that the pile cap (5) and the bridge pier (6) can be prefabricated in the factory, reducing on-site construction time.

[0055] The male connector (3) and the female connector (4) are prefabricated in the factory, the strength of the connector is controllable, the use of steel bars can be reduced, and the reliance on the experience of on-site workers can be reduced during construction.

[0056] The mechanical interlocking strength between the male connector (3) and the female connector (4) can be verified in advance, so that the strength is controllable and avoids the situation where the strength is difficult to monitor and control after the traditional wet joint or rebar binding construction.

[0057] By assembling the components, the concrete curing time can be reduced, thus accelerating the construction process.

[0058] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims and not by the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A wet joint structure between bridge piers, abutments, and pile foundations, characterized in that: It includes multiple pile foundations (1), pile caps (5) and piers (6); Multiple pile foundations (1) are embedded in the soil, and the multiple pile foundations (1) are set at intervals; The foundation (5) is set on the soil; The pier (6) is located on the upper surface of the abutment (5); The bottom surface of the pile cap (5) and the top of the pile foundation (1), and the top of the pile cap (5) and the bottom of the pier (6) are all fixedly connected by connectors; The connector includes a male connector (3) and a female connector (4). The male connector (3) has a socket (11). A sleeve (10) is fixedly connected to the bottom of the female connector (4). The socket (11) is used to insert into the sleeve (10). An injection tube (17) is fixedly connected to the bottom of the female connector (4). The injection tube (17) is located inside the sleeve (10) and is connected to an external injection device.

2. The wet joint structure between bridge piers, abutments, and pile foundations according to claim 1, characterized in that: The connecting female head (4) is provided with a material conveying pipe (16), and the material conveying pipe (16) is provided with a filling port, which is located outside the connecting female head (4); The injection pipe (17) extends vertically and enters the interior of the connecting female head (4), and the injection pipe (17) is connected to the conveying pipe (16); Multiple seepage holes (12) are provided on the sleeve (10).

3. The wet joint structure between bridge piers, abutments, and pile foundations according to claim 2, characterized in that: The bottom of the pier (6) and the bottom of the abutment (5) are both fixedly connected to the connecting head (4).

4. The wet joint structure between bridge piers, abutments, and pile foundations according to claim 2 or 3, characterized in that: The bottom of the female connector (4) is provided with key teeth (8), and the top of the male connector (3) is provided with tooth grooves (9). The key teeth (8) and tooth grooves (9) mesh.

5. The wet joint structure between bridge piers, abutments, and pile foundations according to claim 4, characterized in that: The tooth groove (9) is an inverted trapezoidal structure with an upper opening, and the key tooth (8) is adapted to the shape of the tooth groove (9).

6. The wet joint structure between bridge piers, abutments, and pile foundations according to any one of claims 1-3, characterized in that: A connecting plate (2) is fixedly installed between the tops of the plurality of pile foundations (1) and on the top of the pile cap (5), and a second pre-embedded steel bar (15) is fixedly connected to the bottom of the connecting plate (2). The connecting plate (2) has a connecting hole (14), the connecting male head (3) has a socket hole, the connecting screw (13) is inserted into the socket hole, and the connecting screw (13) is threadedly connected to the connecting hole (14).

7. A method for constructing a wet joint between bridge piers, abutments, and pile foundations, applicable to the wet joint structure between bridge piers, abutments, and pile foundations as described in claim 6, characterized in that... Includes the following steps: Step S1: Excavate pile holes, pour and form pile foundation (1), and install connecting plate (2); Step S2: The male connector (3) is hoisted onto the pile foundation (1) and installed onto the top of the pile foundation (1) via the connecting plate (2); Step S3: Hoist the pile cap (5) above the pile foundation (1) so that the female connector (4) and the male connector (3) are connected; Step S4: Grouting between the male connector (3) and the female connector (4); Step S5: Connect the male connector (3) to the base plate (5) and install it to the top of the base plate (5) via the connecting plate (2); Step S6: Hoist the pier (6) above the abutment (5) and connect the female connector (4) and the male connector (3); Step S7: Repeat S4.

8. The construction method for wet joints between bridge piers, abutments, and pile foundations according to claim 7, characterized in that: The grouting method in S4 is to input grout into the conveying pipe (16), the conveying pipe (16) delivers the grout into the injection pipe (17), the injection pipe (17) fills the sleeve (10), the grout in the sleeve (10) seeps out from the seepage hole (12), and the seeping grout fills the gap between the inner wall of the sleeve (10) and the socket (11); After the gap between the sleeve (10) and the inner wall of the socket (11) is filled, the slurry overflows from the top of the socket (11) until the gap between the male head (3) and the female head (4) is filled.

9. The construction method for wet joints between bridge piers, abutments, and pile foundations according to claim 8, characterized in that: A gap is left between the bottom of the injection tube (17) and the bottom wall of the socket (11).

10. The construction method for wet joints between bridge piers, abutments, and pile foundations according to claim 7, characterized in that: In S2, after the male connector (3) is connected to the connecting plate (2), the top of the male connector (3) is covered with mortar.

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