Pile-pier integrated bent cap steel bar fixing device and construction method thereof

Abstract

The invention provides a pile-pier integrated bent cap reinforcing steel bar fixing device and a construction method thereof, and relates to building engineering construction, the pile-pier integrated bent cap reinforcing steel bar fixing device comprises a prefabricated pipe pile, a main body frame and a positioning assembly, and the main body frame and the positioning assembly are installed on the prefabricated pipe pile; the fixing frame comprises an annular connecting piece and a plurality of triangular supporting units evenly arranged in the circumferential direction of the annular connecting piece. The positioning assembly comprises a positioning column embedded in the center of the top of the prefabricated pipe pile, the positioning column protrudes out of the top of the prefabricated pipe pile and is arranged in an annular connecting piece in a sleeved mode, and a gap between the annular connecting piece and the positioning column is filled with elastic filler. The construction method comprises the steps of measuring the size of the prefabricated pipe pile and the size of the main body frame, manufacturing the triangular supporting unit, installing the fixing frame, sleeving the annular connecting piece, adding the balance weight sandbag and the like, the stress state of the supporting unit is monitored through the stress sensor, and the balance weight is adjusted according to the stress state. Accurate positioning, stable connection and uniform stress between the prefabricated pipe pile and the main body frame are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of building engineering construction, and in particular to a pile-pier integrated cap beam reinforcement fixing device and a construction method thereof. Background Art

[0002] In bridge construction, the connection between prefabricated pipe piles and cast-in-place cap beams is a key link to ensure the overall stability and bearing capacity of the bridge structure. At present, in the connection construction between prefabricated pipe piles and the main steel frame of the cap beam, manual measurement and positioning and temporary support and fixing are mainly used for installation.

[0003] However, the above-mentioned traditional construction method has the following technical defects: First, during the installation and positioning of the main frame, due to the lack of reliable positioning reference and positioning structure, it only relies on manual measurement and temporary marking, which is easy to cause installation position deviation and affect the connection quality of the prefabricated pipe piles and the cap beam; second, a rigid connection method is adopted between the main frame and the prefabricated pipe piles, which is easily affected by external force and produces relative displacement during the construction process, and the frame itself is prone to shaking, resulting in poor stability of the connection structure; third, due to the unreasonable design of the main frame support structure, the load transfer between it and the prefabricated pipe piles is uneven, which is easy to cause local stress concentration and affect the overall stress performance of the structure. Summary of the invention

[0004] The object of the present invention is to provide a pile-pier integrated cap beam reinforcement fixing device and a construction method thereof, which can improve the installation and positioning accuracy of prefabricated pipe piles and main frames, enhance the connection stability, and achieve uniform force.

[0005] To achieve the above object, the present invention is implemented through the following technical solutions:

[0006] A pile-pier integrated cap beam reinforcement fixing device comprises a prefabricated pipe pile and a main frame installed on the prefabricated pipe pile, the prefabricated pipe pile and the main frame bracket are also installed with a positioning assembly, the main frame comprises a plurality of fixed frames, the fixed frames comprise an annular connector and a plurality of triangular support units evenly arranged along the circumferential direction of the annular connector, the sum of the base dimensions of the triangular support units in any direction is greater than the diameter of the prefabricated pipe pile and smaller than the base dimension of the main frame; the fixed frames are evenly distributed below the main frame, and the center spacing between the fixed frames corresponds to the center spacing between the prefabricated pipe piles;

[0007] The positioning assembly includes: a positioning column buried in the center of the top of the prefabricated pipe pile, the positioning column protrudes from the top of the prefabricated pipe pile, the diameter of the positioning column is smaller than the inner diameter of the annular connector, and the positioning column is sleeved in the annular connector.

[0008] Furthermore: it also includes an intelligent monitoring system, which includes: an electronic level set on the main frame; a stress sensor set on the triangular support unit; and a wireless transmission module electrically connected to the electronic level and the stress sensor.

[0009] Furthermore: a gap is provided between the annular connecting member and the positioning column, and the gap is filled with elastic filler.

[0010] Furthermore, the inner wall of the annular connector and / or the outer wall of the positioning column are provided with anti-skid teeth. By filling elastic fillers between the positioning column and the annular connector and providing anti-skid teeth on the contact surface, it is not only possible to buffer the impact force during the construction process, but also to enhance the stability of the structural connection and effectively prevent the main frame from shaking.

[0011] Furthermore: the elastic filler is made of rubber material, and the thickness of the elastic filler is 2-5mm.

[0012] Furthermore: the measurement accuracy of the electronic level is not less than 0.1 mm / m.

[0013] The present invention also provides a construction method of the above-mentioned pile-pier integrated cap beam reinforcement fixing device, comprising the following steps:

[0014] S1: Measure the outer diameter of the prefabricated pipe piles and the spatial dimensions of the main frame;

[0015] S2: Make triangular support units according to measurement data;

[0016] S3: Install the fixed frame to the main frame, and hoist the main frame horizontally to the top of the prefabricated pipe piles;

[0017] S4: Sleeve the annular connector in the fixed frame onto the corresponding positioning column;

[0018] S5: Add weighted sandbags on top of the main frame.

[0019] Further: the step S5 specifically includes: S51: calculating the weight W of the main frame, evenly arranging initial counterweight sand bags on the top of the main frame, and the total weight of the initial counterweight is 0.2W;

[0020] S52: Detecting the tensile stress value of each triangular support unit through a stress sensor, and when the stress value of any measuring point exceeds a preset range, adding a single weighted sand bag at the corresponding position;

[0021] S53: The weight of each weighted sand bag is 10kg-15kg, and the distance between adjacent weighted sand bags is not less than 30cm;

[0022] S54: Repeat step S52 until the stress values ​​of each measuring point are within a preset range, and the change rate of the stress values ​​between two adjacent tests is less than 5%.

[0023] Furthermore: the preset range in step S52 is ±15% of the design stress value.

[0024] Furthermore: in step S5, the weight of the counterweight sandbag is 20%-30% of the weight of the steel cage.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. This device realizes precise positioning between the main frame and the prefabricated pipe piles by setting a positioning column on the top of the prefabricated pipe pile and sleeves the annular connector on the positioning column, thereby avoiding installation deviation and improving installation accuracy.

[0027] Second, the triangular support unit is designed with specific dimensions: the sum of the bottom dimensions is larger than the diameter of the prefabricated pipe pile and smaller than the bottom dimension of the main frame, which ensures the spatial stability of the support structure and the overall force balance of the structure.

[0028] 3. Based on the stress data collected in real time by the intelligent monitoring system, combined with the quantitative weight balancing method: the initial weight is 0.2W, and it is gradually adjusted to a stress value change rate of less than 5%, achieving precise balance control of the main frame and avoiding local uneven force. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a structural schematic diagram of the device;

[0030] Figure 2 for Figure 1 Schematic diagram of a cross-sectional view of a single fixed frame in the middle AA direction;

[0031] Figure 3 It is a schematic diagram of a construction method flow chart of a pile-pier integrated cap beam reinforcement fixing device;

[0032] In the figure:

[0033] 1. Main frame; 2. Prefabricated pipe piles; 3. Fixed frame; 3.1. Annular connector; 3.2. Triangular support unit; 3.3. Elastic filler; 4. Positioning column. DETAILED DESCRIPTION

[0034] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the 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 orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] like Figure 1 and 2 As shown: a pile-pier integrated cap beam reinforcement fixing device, comprising a prefabricated pipe pile 2, a main frame 1 installed on the prefabricated pipe pile 2, the prefabricated pipe pile 2 and the main frame 1 bracket are also installed with a positioning assembly, the main frame 1 comprises a plurality of fixed frames 3, the fixed frames 3 comprise an annular connector 3.1 and a plurality of triangular support units 3.2 evenly arranged along the circumferential direction of the annular connector 3.1, the sum of the bottom side dimensions of the triangular support units 3.2 in any direction is greater than the diameter of the prefabricated pipe pile 2 and smaller than the bottom side dimension of the main frame 1; the fixed frames 3 are evenly distributed below the main frame 1, and the center spacing between the fixed frames 3 corresponds to the center spacing between the prefabricated pipe piles 2;

[0037] The positioning assembly includes: a positioning column 4 buried in the center of the top of the prefabricated pipe pile 2, the positioning column 4 protrudes from the top of the prefabricated pipe pile 2, the diameter of the positioning column 4 is smaller than the inner diameter of the annular connector 3.1, and the positioning column 4 is sleeved in the annular connector 3.1.

[0038] It also includes an intelligent monitoring system, which includes: an electronic level set on the main frame 1; a stress sensor set on the triangular support unit 3.2; and a wireless transmission module electrically connected to the electronic level and the stress sensor. The measurement accuracy of the electronic level is not less than 0.1 mm / m.

[0039] There is a gap between the annular connector 3.1 and the positioning column 4, and the gap is filled with an elastic filler 3.3. The inner wall of the annular connector 3.1 and / or the outer wall of the positioning column 4 are provided with anti-skid teeth. By filling the elastic filler 3.3 between the positioning column 4 and the annular connector 3.1 and providing anti-skid teeth on the contact surface, it is not only possible to buffer the impact force during the construction process, but also to enhance the stability of the structural connection and effectively prevent the main frame 1 from shaking. The elastic filler 3.3 is made of rubber, and the thickness of the elastic filler 3.3 is 2-5mm.

[0040] like Figure 3As shown, in another embodiment, the present invention further provides a construction method of the above-mentioned pile pier integrated cap beam reinforcement fixing device, comprising the following steps:

[0041] S1: Measure the outer diameter of the prefabricated pipe pile 2 and the spatial dimensions of the main frame 1;

[0042] S2: Make a triangular support unit 3.2 according to the measurement data;

[0043] S3: Install the fixed frame 3 to the main frame 1, and hoist the main frame 1 horizontally to the top of the prefabricated pipe pile 2;

[0044] S4: Sleeve the annular connecting member 3.1 in the fixed frame 3 onto the corresponding positioning column 4;

[0045] S5: Add a weighted sandbag on the top of the main frame 1.

[0046] The step S5 specifically includes: S51: calculating the weight W of the main frame 1, and evenly arranging initial counterweight sand bags on the top of the main frame 1, with the total weight of the initial counterweight being 0.2W;

[0047] S52: Detecting the tensile stress value of each triangular support unit 3.2 by means of a stress sensor. When the stress value of any measuring point exceeds a preset range, adding a single weighted sand bag at the corresponding position;

[0048] The preset range is ±15% of the design stress value.

[0049] S53: The weight of each weighted sand bag is 10kg-15kg, and the distance between adjacent weighted sand bags is not less than 30cm;

[0050] S54: Repeat step S52 until the stress values ​​of each measuring point are within a preset range, and the change rate of the stress values ​​between two adjacent tests is less than 5%.

[0051] In step S5, the final adjusted weight of the weight-bearing sandbags shall not exceed 30% of the weight of the steel cage.

[0052] The working principle of the present invention is as follows:

[0053] In the practical application of the pile-pier integrated cap beam reinforcement fixing device of the present invention, the outer diameter of the prefabricated pipe pile 2 and the spatial dimension parameters of the main frame 1 are first determined by measurement, and the triangular support unit 3.2 is made based on this. Since the sum of the bottom side dimensions of the triangular support unit 3.2 is larger than the diameter of the prefabricated pipe pile 2 and smaller than the bottom side dimension of the main frame 1, the support structure can provide sufficient support force without generating excessive cantilever stress, thereby ensuring the spatial stability of the support structure.

[0054] A positioning column 4 is embedded in the center of the top of the prefabricated pipe pile 2. The positioning column 4 protrudes from the top of the prefabricated pipe pile 2 and its diameter is smaller than the inner diameter of the annular connector 3.1. This structural design enables the annular connector 3.1 to be accurately sleeved on the positioning column 4. A rubber elastic filler 3.3 with a thickness of 2-5 mm is provided between the annular connector 3.1 and the positioning column 4, and anti-skid tooth patterns are provided on the inner wall of the annular connector 3.1 and the outer wall of the positioning column 4. The buffering effect of the elastic filler 3.3 and the anti-skid effect of the anti-skid tooth patterns effectively prevent the main frame 1 from shaking and displacement during the construction process.

[0055] After the fixed frame 3 of the main frame 1 is sleeved on the corresponding positioning column 4 through the annular connector 3.1, the intelligent monitoring system starts to work. Among them, the electronic level monitors the levelness of the main frame 1 in real time, and the measurement accuracy is not less than 0.1mm / m; the stress sensor set on the triangular support unit 3.2 monitors the stress state of the support structure in real time, and all monitoring data are transmitted through the wireless transmission module to provide data support for subsequent counterweight adjustment.

[0056] To ensure the overall balance of the structure, a counterweight is placed on the top of the main frame 1. First, the weight W of the main frame 1 is calculated, and the initial counterweight sandbags with a total weight of 0.2W are evenly arranged on the top. Then, according to the stress values ​​of each measuring point detected by the stress sensor, when the stress value of a certain measuring point exceeds the preset range of ±15% of the design stress value, a single counterweight sandbag with a weight of 10kg-15kg is added to the corresponding position, and the spacing between adjacent counterweight sandbags is not less than 30cm. Through repeated testing and adjustment, until the stress values ​​of each measuring point are within the preset range, and the stress value change rate of two adjacent tests is less than 5%, the precise balance of the structure is finally achieved.

[0057] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology to understand the content of the present invention and implement it accordingly, and they cannot be used to limit the protection scope of the present invention. Any equivalent transformation or modification made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A pile-pier integrated cap beam reinforcement fixing device, comprising a prefabricated pipe pile and a main frame installed on the prefabricated pipe pile, characterized in that: The prefabricated pipe pile and the main frame bracket are also equipped with a positioning assembly. The main frame includes a plurality of fixed frames, and the fixed frames include an annular connector and a plurality of triangular support units evenly arranged along the circumferential direction of the annular connector. The sum of the base dimensions of the triangular support units in any direction is greater than the diameter of the prefabricated pipe pile and smaller than the base dimension of the main frame. The fixed frames are evenly distributed below the main frame, and the center spacing between the fixed frames corresponds to the center spacing between the prefabricated pipe piles. The positioning assembly includes: a positioning column buried in the center of the top of the prefabricated pipe pile, the positioning column protrudes from the top of the prefabricated pipe pile, the diameter of the positioning column is smaller than the inner diameter of the annular connector, and the positioning column is sleeved in the annular connector.

2. The device for fixing steel bars of a pile-pier integrated cap beam according to claim 1, characterized in that: It also includes an intelligent monitoring system, which includes: an electronic level set on the main frame; a stress sensor set on the triangular support unit; and a wireless transmission module electrically connected to the electronic level and the stress sensor.

3. The device for fixing steel bars of a pile-pier integrated cap beam according to claim 1, characterized in that: A gap is provided between the annular connecting member and the positioning column, and the gap is filled with elastic filler.

4. The device for fixing steel bars of a pile-pier integrated cap beam according to claim 3 is characterized in that: The inner wall of the annular connecting piece and / or the outer wall of the positioning column are provided with anti-slip tooth patterns.

5. The device for fixing steel bars of a pile-pier integrated cap beam according to claim 3, characterized in that: The elastic filler is made of rubber material, and the thickness of the elastic filler is 2-5 mm.

6. The device for fixing steel bars of a pile-pier integrated cap beam according to claim 2, characterized in that: The measuring accuracy of the electronic level is not less than 0.1 mm / m.

7. A construction method for the pile-pier integrated cap beam reinforcement fixing device according to any one of claims 1 to 6, characterized in that: The following steps are involved: S1: Measure the outer diameter of the prefabricated pipe piles and the spatial dimensions of the main frame; S2: Make triangular support units according to measurement data; S3: Install the fixed frame to the main frame, and hoist the main frame horizontally to the top of the prefabricated pipe piles; S4: Sleeve the annular connector in the fixed frame onto the corresponding positioning column; S5: Add weighted sandbags on top of the main frame.

8. The construction method according to claim 7, characterized in that: The step S5 specifically includes: S51: Calculate the weight W of the main frame, evenly arrange initial counterweight sand bags on the top of the main frame, and the total weight of the initial counterweight is 0.2W; S52: Detecting the tensile stress value of each triangular support unit through a stress sensor, and when the stress value of any measuring point exceeds a preset range, adding a single weighted sand bag at the corresponding position; S53: The weight of each weighted sand bag is 10kg-15kg, and the distance between adjacent weighted sand bags is not less than 30cm; S54: Repeat step S52 until the stress values ​​of each measuring point are within a preset range, and the change rate of the stress values ​​between two adjacent tests is less than 5%.

9. The construction method according to claim 8, characterized in that: The preset range in step S52 is ±15% of the design stress value.

10. The construction method according to claim 7, characterized in that: In step S5, the weight of the counterweight sandbag is 20%-30% of the weight of the steel cage.

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