Steel-concrete combined anchor pull rod sheet body connecting structure convenient to install and position

Abstract

The utility model discloses a steel-concrete combined anchor pull rod sheet body connecting structure convenient to install and position. The steel-concrete combined anchor pull rod sheet body connecting structure comprises an embedded support, a fixing support, an anchor beam and an anchor pull rod assembly. The pre-embedded bracket is pre-embedded on a bridge concrete tower column and is used for positioning and mounting an anchor beam; the anchor beams and the anchor pull rod assemblies are assembled into anchor pull rod sheet bodies through the fixing supports, and the anchor pull rod sheet bodies are positioned and installed on the corresponding embedded supports. The anchor pull rod sheet body further comprises a plurality of seamless steel pipes, the seamless steel pipes are arranged on the anchor pull rod in a sleeving mode, and reserved mud jacking pipes used for mud jacking are arranged on the seamless steel pipes. According to the utility model, the anchor pull rod is arranged in a split structure and is hoisted in a split manner, the anchor pull rod is divided into a plurality of sheet bodies for hoisting according to the anchor beam, the anchor pull rod, the seamless steel pipe, the anchor beam and the like can be assembled into sheet bodies on the platform, and the steel plate is pre-embedded on the poured lower tower column before hoisting, so that the construction and the assembly are convenient; the assembling efficiency and precision of the anchor pull rod can be improved, and the mounting precision of the anchor pull rod can be controlled within the range of 2 cm.

Description

Technical Field

[0001] The utility model relates to the technical field of mixed cable-stayed bridges, in particular to a steel-concrete combined anchor rod sheet body connection structure which is convenient for installation and positioning. Background Art

[0002] At present, most of the cable-stayed bridge towers in the world are made of concrete. Before the 21st century, the development of steel cable towers was restricted by factors such as complex construction technology, high cost, and inconvenient later maintenance. With the development of steel tower manufacturing technology and economy, steel cable towers have developed rapidly with their advantages such as excellent bearing capacity, good stability, good landscape effect, and fast construction progress. The steel-concrete combined section is the key part where the steel tower column and the concrete tower column are connected to form a whole common force and coordinated deformation. Therefore, the structural setting of the steel-concrete combined section is intuitive and important in the steel cable tower. It not only affects the mechanical structure of the steel cable tower, but also determines the bearing capacity and spanning capacity of the steel cable tower. On the other hand, whether the design of the steel-concrete combined section is reasonable or not is also related to the actual construction difficulty, which directly affects the overall progress of the bridge construction project. In some inclined tower column structures with an inclination angle, there is a certain inclination angle on the transverse bridge surface after the tower section is in place. If the anchor rod is installed later, the anchor rod needs to be inserted from the top of the tower section anchor box, pass through the pressure plate and connect with the anchor beam. At this time, the anchor beam needs to be suspended and fixed first. In this case, it is difficult to install the bottom anchor manually. At the same time, the anchor rod needs to be lowered obliquely. Due to the effect of gravity, the surface anti-corrosion structure layer may be scratched. For this reason, the anchor rod needs to be installed first. When installing the anchor rod, there is no facility on the steel-concrete joint section that can be used to fix the anchor rod bracket, so auxiliary measures must be taken to accurately position it. At the same time, the anchor rod has a certain angle, which makes it difficult to accurately position it. After the anchor rod is installed first, when the installation accuracy of the anchor rod is difficult to control, how to simultaneously pass the steel-concrete joint section through multiple anchor rods and their component structures becomes the biggest problem in the hoisting and lowering of the steel-concrete joint section. Utility Model Content

[0003] In view of the above problems, the utility model provides a steel-concrete combined anchor rod sheet connection structure which is easy to install and position. The technical solution of the utility model is:

[0004] A steel-concrete combined anchor rod sheet connection structure that is easy to install and position, comprising a pre-buried bracket, a fixed bracket, an anchor beam and an anchor rod assembly;

[0005] The embedded bracket is embedded in the concrete tower column of the bridge and is used to position and install the anchor beam;

[0006] The anchor beam and the anchor rod assembly are assembled into an anchor rod sheet body through the fixing bracket, and the anchor rod sheet body is positioned and installed on the corresponding embedded bracket;

[0007] The anchor rod sheet body also includes a plurality of seamless steel pipes, which are respectively sleeved on the anchor rods, and reserved grouting pipes for grouting are arranged on the seamless steel pipes.

[0008] As a further illustration of the present utility model, a plurality of anchor beam positioning blocks are arranged on the embedded bracket.

[0009] Furthermore, the fixed bracket includes a plurality of transverse brackets and a plurality of diagonal brackets.

[0010] Furthermore, a lifting ring is provided at the upper end of the anchor rod.

[0011] Furthermore, the anchor beam is connected to the fixed bracket by using limiting steel bars.

[0012] Furthermore, a bottom reinforcement bar is provided at the bottom of the anchor beam.

[0013] Furthermore, the anchor rod sheet body includes an inner peripheral anchor rod sheet body and an outer peripheral anchor rod sheet body, and the outer peripheral anchor rod sheet body is located outside the inner peripheral anchor rod sheet body.

[0014] Furthermore, an anchor kit is provided at the end of the anchor rod, and the anchor kit is filled with anti-corrosion grease.

[0015] Beneficial effects of the utility model:

[0016] The anchor rod of the utility model adopts a segmented structure and a segmented hoisting method, and the anchor rod is divided into several segments for hoisting according to the anchor beam. First, the anchor rod, seamless steel pipe, anchor beam, etc. are assembled into segments on the steel platform, and before hoisting, a steel plate is embedded on the cast lower tower column, and then a simple bracket is set up with channel steel to fix the anchor rod segments, which is convenient for construction and assembly, and can improve the assembly efficiency and accuracy of the anchor rod. The installation accuracy of the anchor rod can be controlled within 2 cm. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 The structure of the anchor rod sheet of the utility model is shown in FIG. Figure 1 ;

[0018] Figure 2 The structure of the anchor rod sheet of the utility model is shown in FIG. Figure 2 ;

[0019] Figure 3 This is a schematic diagram of the installation of the anchor rod sheet body according to the embodiment of the utility model;

[0020] Figure 4 This is a diagram illustrating the actual application state of the anchor rod assembly according to an embodiment of the utility model.

[0021] Figure numerals: embedded bracket 1, fixed bracket 2, cross brace bracket 201, diagonal brace bracket 202, anchor beam 3, concrete tower column 4, anchor rod 5, lifting ring 501, anchor beam positioning block 6, limiting steel bar 7, bottom steel bar 8, anchor kit 9, seamless steel pipe 10, reserved grouting pipe 11. DETAILED DESCRIPTION

[0022] Example:

[0023] The following is a detailed description of the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0024] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0025] As attached Figure 1-3 As shown, a steel-concrete combined anchor rod sheet body connection structure of this embodiment that is easy to install and position includes a pre-embedded bracket 1, a fixed bracket 2, an anchor beam 3 and an anchor rod assembly; the pre-embedded bracket 1 is pre-embedded and set on the concrete tower column 4 of the bridge, and is used to position and install the anchor beam 3; the anchor beam 3 and the anchor rod assembly are assembled into an anchor rod sheet body through the fixed bracket 2, and the anchor rod sheet body is positioned and installed on the corresponding pre-embedded bracket 1; the anchor rod sheet body also includes a plurality of seamless steel pipes 10, which are respectively sleeved on the anchor rod 5, and a reserved grouting pipe 11 for grouting is provided on the seamless steel pipe 10. The anchor rod sheet body structure of this embodiment is a connection and fixing structure used in bridge towers, and has a structure that is not set in the steel-concrete combined section, and is used to improve the connection stability between the upper tower column and the lower tower column concrete pier column. The anchor rod 5 of this embodiment adopts a segmented structure setting, and a segmented hoisting method, and the anchor rod 5 is divided into a plurality of sheets according to the anchor beam 3 for hoisting. First, the anchor rod 5, seamless steel pipe 10, anchor beam 3, etc. are assembled into a sheet body on the steel platform. Before lifting, the steel plate is embedded on the cast lower tower column. Then, a simple bracket is set up with channel steel to fix the anchor rod sheet body, which is convenient for construction and assembly, and can improve the assembly efficiency and accuracy of the anchor rod 5. In actual application, the accuracy of the anchor rod 5 can be controlled within 2 cm.

[0026] In a preferred embodiment, as shown in the attached drawings, the seamless steel pipe 10 of this embodiment is used as a grouting pipe on the one hand, and is used for grouting treatment after the concrete pouring of the steel-concrete joint section to ensure the overall casting quality and strength of the steel-concrete joint section. On the other hand, it can further improve the tensioning and stress effect of the anchor rod 5, further improve the overall force and force transmission effect of the steel-concrete joint section, and make it safer and more reliable. Specifically, in order to realize the above-mentioned functions of the seamless steel pipe 10, as a feasible embodiment, as shown in the attached drawings, in this embodiment, a hole is opened at the lower position of the seamless steel pipe 10 by a small drilling rig before installation, and then a centimeter connecting pipe is welded on the hole. The connecting pipe connects the plastic pipe to the outside of the template and is used as a reserved grouting pipe 11. After the tensioning adjustment of the anchor rod 5 is completed, the subsequent grouting treatment is carried out through the seamless steel pipe 10 and the reserved grouting pipe 11, so that the concrete can be completely filled and full, and the strength of the concrete is ensured.

[0027] Specifically, in the present embodiment, a plurality of anchor beam positioning blocks 6 are provided on the embedded bracket 1, and the assembled anchor rod sheet body can be accurately positioned to a set position and angle direction through the anchor beam positioning blocks 6 during the installation process.

[0028] It is feasible that the fixed bracket 2 includes a plurality of transverse brackets 201 and a plurality of diagonal brackets 202. The fixed bracket 2 formed by the two can combine the anchor rod 5 and its functional components into an anchor rod assembly, which can be installed in pieces as a whole during installation.

[0029] In this embodiment, a lifting ring 501 is provided at the upper end of the anchor rod 5. In order to facilitate the positioning, alignment and installation of the anchor rod 5 in this embodiment, as shown in the attached drawings, in this embodiment, a lifting ring 501 for assisting the installation of the anchor rod 5 is provided at the upper end of the anchor rod 5. In the actual lifting process, the main body of the steel-concrete combination section is lifted by a tower crane and then slowly lowered until the bottom of the shear key is 50 cm away from the top of the anchor rod 5, and its posture is adjusted by rotating the segments of the hand chain hoist. After the posture is adjusted, the main body of the steel-concrete combination section is slowly lowered until the top of the anchor screw is about 50 cm away from the pressure plate, and the anchor rod 5 is aligned with the positioning holes of the anchor box one by one, and the main body of the steel-concrete combination section is continued to be lowered until the seamless steel pipe 10 is about 5 cm away from the pressure plate, and the seamless steel pipes 10 are manually lifted one by one and passed through the anchor box and welded and fixed, and then the main body of the steel-concrete combination section is lowered into place. After being lowered into place, the root anchor rod 5 is pulled upward through the lifting ring 501 welded in advance on the top of the anchor rod 5 by using a hand winch and a simple hook to smoothly pass through the anchor box, thereby completing the alignment and installation of the anchor rod 5.

[0030] In this embodiment, the anchor beam 3 is connected to the fixed bracket 2 by a limiting steel bar 7, so that it can move in a small range. When the steel-concrete combined section is lowered to near the top of the anchor rod 5, the plane position of the anchor rod 5 is manually adjusted one by one and then fixed to ensure that all the anchor rods 5 are aligned with the anchor box holes, and then the steel-concrete combined section is continued to be lowered so that all the anchor rods 5 are inserted into the anchor box.

[0031] In this embodiment, a bottom reinforcement bar 8 is provided at the bottom of the anchor beam 3 so that after the steel-concrete combined section is in place, the top of the anchor rod 5 is located in the upper middle part of the anchor box, which is convenient for operation through the anchor box.

[0032] In this embodiment, the anchor rod sheet body includes an inner anchor rod sheet body and an outer anchor rod sheet body, and the outer anchor rod sheet body is located outside the inner anchor rod sheet body. Through the arrangement of the inner and outer anchor rods 5, the anchor rods 5 adopt large-diameter high-strength screws. Based on the steel-concrete connection structure design of the cable-stayed bridge of this embodiment, one end of the anchor rod 5 is anchored on the steel-concrete combination section, and the other end is anchored on the anchor beam pre-embedded in the concrete tower column. By applying pre-tension to the screw rod to maintain close contact between the cross section of the steel tower column and the supporting surface, the force transmission effect of the steel-concrete combination section of this embodiment is ensured. In addition, corresponding to the different lengths of the shear key steel plate in the longitudinal direction and the shear key steel plate in the transverse direction described in this embodiment, the number of anchor rods 5 arranged on the side in the longitudinal direction is greater than the number of anchor rods 5 arranged on the side in the transverse direction. As shown in the attached figure, a total of 52 anchor rods 5 are arranged in the steel-concrete combination section of this embodiment to meet the requirements of the steel-concrete combination section of the embodiment for tension.

[0033] Preferably, an anchor kit 9 ​​is provided at the end of the anchor rod 5, and the anchor kit 9 ​​is filled with anti-corrosion grease.

[0034] The above only describes the preferred embodiments of the utility model, which should not be construed as limiting the claims. The utility model is not limited to the above embodiments, and its specific structure is allowed to be changed. In short, all changes made within the protection scope of the independent claims of the utility model are within the protection scope of the utility model.

Claims

1. A steel-concrete combined anchor rod sheet connection structure that is easy to install and position, characterized in that: It includes embedded bracket, fixed bracket, anchor beam and anchor rod assembly; The embedded bracket is embedded in the concrete tower column of the bridge and is used to position and install the anchor beam; The anchor beam and the anchor rod assembly are assembled into an anchor rod sheet body through the fixing bracket, and the anchor rod sheet body is positioned and installed on the corresponding embedded bracket; The anchor rod sheet body also includes a plurality of seamless steel pipes, which are respectively sleeved on the anchor rods, and reserved grouting pipes for grouting are arranged on the seamless steel pipes.

2. The steel-concrete combined anchor rod sheet connection structure that is easy to install and position according to claim 1 is characterized in that: The embedded bracket is provided with a plurality of anchor beam positioning blocks.

3. The steel-concrete combined anchor rod sheet connection structure that is easy to install and position according to claim 1 is characterized in that: The fixed bracket includes a plurality of transverse brackets and a plurality of diagonal brackets.

4. The steel-concrete combined anchor rod sheet connection structure that is easy to install and position according to claim 3 is characterized in that: The upper end of the anchor rod is provided with a lifting ring.

5. The steel-concrete combined anchor rod sheet connection structure that is easy to install and position according to claim 3 is characterized in that: The anchor beam is connected to the fixed bracket by using limiting steel bars.

6. The steel-concrete combined anchor rod sheet connection structure that is easy to install and position according to claim 3 is characterized in that: A bottom reinforcement bar is arranged at the bottom of the anchor beam.

7. The steel-concrete combined anchor rod sheet connection structure that is easy to install and position according to claim 3 is characterized in that: The anchor rod sheet body comprises an inner peripheral anchor rod sheet body and an outer peripheral anchor rod sheet body, and the outer peripheral anchor rod sheet body is located outside the inner peripheral anchor rod sheet body.

8. The steel-concrete combined anchor rod sheet connection structure that is easy to install and position according to claim 3 is characterized in that: An anchor kit is arranged at the end of the anchor rod, and anti-corrosion grease is filled in the anchor kit.

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