Combined type guardrail embedded part positioning device and construction method

Abstract

The invention relates to the field of traffic infrastructure engineering, in particular to a combined type guardrail embedded part positioning device and a construction method. The device comprises a main frame, wherein the main frame comprises a plurality of frame square steel pipes which are connected with one another and a reference rod which is connected to the frame square steel pipes; the size of the outer contour of the main frame is the same as that of the outer contour of the guardrail embedded part; the reference rod coincides with the geometric center line of the main frame. And a positioning assembly which is vertically connected and fixed on the main frame and is used for simulating the design position and length of a to-be-buried bolt. The device can realize lossless avoidance and spatial locking of conflicting steel bars on the premise of not destroying the structural integrity of the main body steel bars, so that the overall safety and reliability of the guardrail are remarkably improved; meanwhile, the device can also ensure the height consistency of the pre-buried position and the designed distance, the construction standardization level is improved, and the construction cost is reduced.

Description

Technical Field

[0001] This invention relates to the field of transportation infrastructure engineering, specifically to a combined guardrail pre-embedded component positioning device and construction method. Background Technology

[0002] In transportation infrastructure construction, composite concrete crash barriers are widely used due to their combination of the rigidity of concrete and the toughness of steel barriers. The structural stability of these barriers highly depends on the reliable anchoring of the bottom base reinforcement and the upper steel barrier post embedded parts (including embedded steel plates and high-strength anchor bolts). However, due to the extremely dense arrangement of the internal reinforcement of the barrier base and the complex construction site environment, there is often a serious physical spatial conflict between the precise positioning of the embedded parts and the dense reinforcement mesh. How to achieve high-precision and standardized installation of heavy embedded parts without compromising the integrity of the main steel reinforcement structure has become a key issue restricting the construction quality and efficiency of barriers.

[0003] In existing technologies, there are two main conventional methods for handling conflicts between embedded parts and reinforcing bars: one is to directly cut off the base reinforcing bars at the conflicting location when the embedded bolt position is found to be blocked by reinforcing bars, and then weld reinforcing bars after the embedded part is in place; the second is to finely adjust the installation position of the embedded part to avoid the reinforcing bars without altering them. Furthermore, during construction, it is usually necessary to directly lift and install physical embedded parts with a relatively large design weight, and to manually align, calibrate, and fix them during installation.

[0004] The aforementioned existing technologies have significant drawbacks. First, the method of cutting and reinforcing steel bars significantly weakens the original strength of the guardrail steel bars at the location of the embedded parts, and the heat-affected zone generated by welding alters the mechanical properties of the steel bars, reducing the impact resistance level of the guardrail. Second, the method of offsetting the position of the embedded parts leads to differences in the spacing between each embedded part, failing to meet the requirements of standardized construction, and necessitates the customization of non-standard steel guardrail beams in the next process based on the actual spacing, greatly increasing production costs and workload. Furthermore, due to the enormous weight of the physical embedded parts, repeatedly adjusting their positions within a dense steel mesh is not only extremely labor-intensive but also makes it very difficult to achieve millimeter-level precision control, severely impacting construction efficiency. Summary of the Invention

[0005] The purpose of this invention is to provide a combined guardrail pre-embedded component positioning device and construction method. This device can achieve non-destructive avoidance and spatial locking of conflicting steel bars without damaging the integrity of the main steel reinforcement structure, significantly improving the overall safety and reliability of the guardrail. At the same time, this device can also ensure the high consistency between the pre-embedded position and the design spacing, improve the level of construction standardization and reduce construction costs.

[0006] To achieve the above objectives, the technical solution adopted by the present invention is as follows: In a first aspect, the present invention provides a combined guardrail embedded component positioning device, comprising: The main frame comprises multiple interconnected square steel pipes and a reference rod connected to the square steel pipes; the outer contour of the main frame is the same as the outer contour of the guardrail embedded parts; the reference rod coincides with the geometric center line of the main frame. A positioning component is vertically connected and fixed to the main frame to simulate the design position and length of the bolt to be buried.

[0007] The main frame is composed of multiple square steel tubes, which are connected to each other by welding and fasteners to form a rigid rectangular frame. The outer dimensions of this frame are exactly the same as the outer dimensions of the embedded parts of the guardrail to be installed. This makes the main frame a precise locating model. During construction, as long as the main frame can be placed in the designed position without conflict, the actual embedded parts can also be positioned in space.

[0008] A reference rod is welded to the square steel tube of the frame. The axis of the reference rod coincides with the geometric center line of the main frame. The reference rod acts as the spine of the entire device, enhancing the structural strength of the main frame. Furthermore, the coincidence of the reference rod with the geometric center line ensures the positioning accuracy of the total station or manual measurement using a measuring tape. The positioning component is permanently or detachably fixed to the main frame through vertical welding, snap-fit ​​connections, or other methods. It is used to simulate the design position and extension length of the bolts to be embedded.

[0009] As a preferred embodiment of the present invention, the positioning assembly includes multiple thin-walled hollow tubes for insertion and positioning, and a connecting rod welded to the top of the thin-walled hollow tubes, wherein the outer diameter of the thin-walled hollow tubes is larger than the diameter of the bolt to be embedded.

[0010] As a preferred embodiment of the present invention, the positioning component further includes a tapered guide head disposed at the bottom end of the thin-walled hollow tube, the tapered guide head being used to guide the thin-walled hollow tube through the gap of the steel mesh during its descent under its own weight.

[0011] As a preferred embodiment of the present invention, the surface of the frame square steel tube is provided with scale lines, which are used to assist in observing the horizontal offset of the positioning component.

[0012] As a preferred embodiment of the present invention, a level bubble calibrator is installed on the upper surface of both the frame square steel tube and the reference rod. The level bubble calibrator is used to monitor the levelness of the main frame after it is placed.

[0013] As a preferred embodiment of the present invention, the top of the frame square steel tube is provided with an operating handle, and the operating handle is covered with an anti-slip insulating layer to assist construction personnel in vertical insertion and lifting operations.

[0014] As a preferred embodiment of the present invention, a reference groove is engraved at the axial center of the reference rod, and the reference groove is used as a physical reference for the total station to align points or for the steel tape measure to extend distances.

[0015] Secondly, the present invention also provides a construction method for a combined guardrail embedded part positioning device, the method comprising: S01, Determine the pre-embedded location and arrange the main frame horizontally directly above the projection of the pre-embedded location; S02, obtain the vertical projection distribution map of the bolts to be buried and the length parameters of each bolt, and determine the welding position of the positioning component based on the vertical projection distribution map and the length parameters, and weld the positioning component to the main frame; S03, place the main frame horizontally above the pre-embedded position, and then drive the positioning component vertically downward through the three-dimensional steel mesh layer; S04, perform non-destructive cold bending adjustment on all steel bars in the travel path of the positioning component and lock them with locking components; S05, complete the positioning of the embedded parts, and remove the main frame and the positioning component connected to the main frame.

[0016] In summary, the present invention has the following beneficial effects: This invention uses lightweight positioning components to pre-simulate and plan the installation path, enabling non-destructive adjustment of conflicting reinforcing bars before the installation of heavy embedded parts, thus resolving the contradiction between strength and precision in traditional construction. This device can ensure the accuracy of the embedded position while avoiding cutting reinforcing bars and preserving the original structural performance of heavy embedded parts.

[0017] The device provided by this invention has the ability to perform geometric reference positioning, horizontal calibration and scale measurement, making the results of pre-embedded operations predictable and reproducible, which can meet the development needs of high-quality infrastructure construction. Attached Figure Description

[0018] 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 some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a top view of the main frame of this device; Figure 2This is a side view of the positioning components of this device; Figure 3 A diagram showing the construction position relationship between the positioning device and the embedded parts of the guardrail; Figure 4 This is a flowchart of the method of the present invention.

[0020] In the diagram: Main frame 1, frame square steel tube 11, reference rod 12, positioning component 2, thin-walled hollow tube 21, connecting rod 22, conical guide head 23, horizontal bubble calibrator 3, operating handle 4. Detailed Implementation

[0021] The subject matter described herein will now be discussed with reference to exemplary embodiments. It should be understood that these embodiments are discussed merely to enable those skilled in the art to better understand and implement the subject matter described herein, and are not intended to limit the scope, applicability, or examples set forth in the claims. The function and arrangement of the elements discussed may be changed without departing from the scope of this specification. Various processes or components may be omitted, substituted, or added as needed in the various examples. For example, the described methods may be performed in a different order than described, and steps may be added, omitted, or combined. Furthermore, features described in some examples may be combined in other examples.

[0022] As used herein, the term "comprising" and its variations are open terms meaning "including but not limited to". The term "based on" means "at least partially based on". The terms "one embodiment" and "an embodiment" mean "at least one embodiment". The term "another embodiment" means "at least one other embodiment". The terms "first", "second", etc., may refer to different or the same objects. Other definitions, whether explicit or implicit, may be included below. Unless explicitly indicated by the context, the definition of a term shall remain consistent throughout the specification.

[0023] like Figures 1 to 3 As shown, this embodiment provides a combined guardrail embedded part positioning device, which is used to accurately simulate the spatial occupancy of the embedded part and complete the conflict detection before the actual installation.

[0024] The main frame 1 is composed of multiple (preferably four) square steel pipes 11, which are connected to each other by welding, fasteners, etc., to form a rigid rectangular frame. The outer contour dimensions of this frame are exactly the same as the outer contour dimensions of the guardrail embedded parts (rectangular embedded steel plate components) to be installed. This makes the main frame 1 a precise placeholder model. During construction, as long as the main frame 1 can be placed in the designed position without conflict, it can be guaranteed that the actual embedded parts can also be positioned in space.

[0025] A reference rod 12 is welded onto the square steel tube 11 of the frame. The axis of the reference rod 12 coincides with the geometric center line of the main frame 1. The reference rod 12 serves as the spine of the entire device and can enhance the structural strength of the main frame 1. In addition, the coincidence of the reference rod 12 with the geometric center line can ensure the positioning accuracy of the total station for point measurement or manual tape measurement.

[0026] The positioning component 2 is permanently or detachably fixed to the main frame 1 through connection methods such as vertical welding and snap-fit, and is used to simulate the design position and extension length of the bolt to be buried.

[0027] The positioning component 2 includes multiple thin-walled hollow tubes 21. The number and planar projection position of the thin-walled hollow tubes 21 are completely consistent with the bolts to be embedded. Their outer diameter is slightly larger than the diameter of the bolts to be embedded, thus providing a safety margin for the installation of the bolts to be embedded. At the same time, the thin-walled design can reduce the overall weight of the positioning device to the greatest extent, reduce manual labor, and improve construction efficiency.

[0028] The positioning component 2 also includes multiple connecting rods 22 welded to the top of the thin-walled hollow tube 21. Multiple thin-walled hollow tubes 21 are vertically welded to each connecting rod 22. Its main purpose is to enhance the connection strength between the thin-walled hollow tubes 21 and improve the structural rigidity of the entire positioning device. It ensures that the relative position between all the thin-walled hollow tubes 21 remains constant during hoisting and lowering, thereby strictly ensuring the spacing accuracy between multiple bolt holes used to mate with the bolts to be embedded.

[0029] The bottom end of the thin-walled hollow tube 21 is provided with a tapered guide head 23. When the positioning device is lowered, the tapered guide head 23 can automatically guide the thin-walled hollow tube 21 to slide into the larger gap of the steel mesh, or slide along the surface of the steel to find the path, which significantly reduces the difficulty of manual alignment and the risk of the thin-walled hollow tube 21 getting stuck, and improves the efficiency of construction.

[0030] To further improve the ease of use and accuracy of the device, in another possible implementation, the surface of the frame square steel tube 11 is provided with scale lines to assist in observing the horizontal offset of the positioning component 2. When the positioning component 2 encounters resistance from the reinforcing bars during its lowering, construction personnel can intuitively and quantitatively read the minute horizontal offset of the thin-walled hollow tube 21 by observing the scale lines, thereby providing data support for subsequent path conflict judgment and scheme adjustment.

[0031] In another possible implementation, a level bubble calibrator 3 is installed on the upper surface of both the frame square steel tube 11 and the reference rod 12. The level bubble calibrator 3 is used to monitor the levelness of the main frame 1 after it is placed. The level bubble calibrator 3 is used to monitor the levelness of the main frame 1 in real time after it is placed. Only when the main frame 1 reaches an absolutely level state can the true verticality of the positioning component 2 welded to it be guaranteed, thereby ensuring that the simulated bolt hole position is vertically downward and avoiding positioning errors caused by frame tilt.

[0032] In another possible implementation, the top of the frame square steel pipe 11 is provided with an operating handle 4, which is covered with an anti-slip insulating layer to assist construction personnel in vertical insertion and lifting operations.

[0033] The operating handle 4 is used to provide a connection point for the operator or the crane hook. The operating handle 4 is covered with an anti-slip insulating layer, which can ensure the safety of personnel in electrical or complex environments. The operating handle 4 is preferably set as two symmetrical ones, so that the construction personnel can apply force based on them, making the vertical insertion, horizontal fine adjustment and final lifting of the positioning device more labor-saving and controllable.

[0034] In another possible implementation, a reference groove is engraved at the axial position of the reference rod 12. The reference groove serves as a physical reference for the total station to align points or for the steel tape measure to extend distances.

[0035] Unlike the embodiments described above, as Figure 4 As shown in the following embodiments, the construction process using the above-described positioning device is described in detail.

[0036] S01, determine the pre-embedded position and arrange the main frame 1 horizontally above the projection of the pre-embedded position.

[0037] First, based on the design drawings, use equipment such as a total station to determine the theoretical design center position of the embedded parts on site; then, directly above the projection of this position, initially arrange the main frame 1 horizontally; use the reference groove on the reference rod 12 to align with the total station, and combine with the level bubble calibrator 3 to finely level the main frame 1 so that its center is aligned.

[0038] S02, obtain the vertical projection distribution map of the bolts to be buried and the length parameters of each bolt, and determine the welding position of the positioning component 2 based on the vertical projection distribution map and the length parameters, and weld the positioning component 2 to the main frame 1.

[0039] Next, obtain the vertical projection distribution diagram of the bolts to be buried and the length parameters of each bolt; based on the above data, weld the thin-walled hollow tubes 21 of the corresponding length into the positioning assembly 2 as a whole through the connecting rods 22 at the work site, and then vertically weld and fix it to the corresponding design position of the main frame 1.

[0040] S03, place the main frame 1 horizontally above the pre-embedded position, and then drive the positioning component 2 vertically downward through the three-dimensional steel mesh layer.

[0041] Afterwards, the assembled positioning device is slowly and vertically inserted into the already tied guardrail base three-dimensional steel mesh through the operating handle 4; the conical guide head 23 of the positioning component 2 guides the thin-walled hollow tube 21 through the gap of the steel bars and guides the thin-walled hollow tube 21 to be placed in place.

[0042] S04, perform non-destructive cold bending adjustment on all steel bars in the travel path of positioning component 2 and lock them with locking parts.

[0043] For the conflicting reinforcing bars identified in S03, use tools such as hydraulic rebar benders for cold bending adjustment to gently bend the reinforcing bars and make enough passage for thin-walled hollow tubes (corresponding to the positions of the bolts to be embedded) to pass through; after adjustment, use special clamps or binding wires to temporarily fix the reinforcing bars in the new positions.

[0044] S05, complete the positioning of the embedded parts, and remove the main frame 1 and the positioning component 2 connected to the main frame 1.

[0045] Finally, once all conflicting reinforcing bars have been adjusted and the positioning device can be lowered to the design elevation without obstruction, it indicates that the space channel for the embedded part has been fully opened and the positioning is complete. At this point, the entire main frame 1 and positioning component 2 can be removed vertically upwards. After the positioning device is removed, the actual, heavy-duty embedded part can be directly hoisted in, and this embedded part can be inserted into the aforementioned space channel without obstruction.

[0046] Several embodiments of this disclosure have been described above. These descriptions are exemplary and not exhaustive, and are not limited to the disclosed embodiments. Many modifications and variations will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments. The terminology used herein is chosen to best explain the principles, practical applications, or technological improvements to the embodiments in the market, or to enable others skilled in the art to understand the embodiments disclosed herein.

Claims

1. A combined guardrail embedded component positioning device, characterized in that, The device includes: The main frame (1) includes multiple interconnected frame square steel pipes (11) and a reference rod (12) connected to the frame square steel pipes (11); the outer contour of the main frame (1) is the same as the outer contour dimension of the guardrail embedded part; the reference rod (12) coincides with the frame geometric center line of the main frame (1). Positioning component (2) is vertically connected and fixed to the main frame (1) to simulate the design position and length of the bolt to be buried.

2. The combined guardrail embedded part positioning device according to claim 1, characterized in that, The positioning component (2) includes multiple thin-walled hollow tubes (21) for insertion and positioning, and a connecting rod (22) welded to the top of the thin-walled hollow tubes (21). The outer diameter of the thin-walled hollow tubes (21) is larger than the diameter of the bolt to be embedded.

3. The combined guardrail embedded part positioning device according to claim 2, characterized in that, The positioning component (2) also includes a tapered guide head (23) disposed at the bottom end of the thin-walled hollow tube (21), the tapered guide head (23) being used to guide the thin-walled hollow tube through the gap of the steel mesh during its own weight fall.

4. The combined guardrail embedded part positioning device according to claim 1, characterized in that, The surface of the frame square steel tube (11) is provided with scale lines, which are used to assist in observing the horizontal offset of the positioning component (2).

5. A combined guardrail embedded part positioning device according to claim 1, characterized in that, The upper surfaces of the frame square steel tube (11) and the reference rod (12) are both equipped with a level bubble calibrator (3), which is used to monitor the levelness of the main frame (1) after it is placed.

6. A combined guardrail embedded part positioning device according to claim 1, characterized in that, The top of the frame square steel pipe (11) is provided with an operating handle (4), which is covered with an anti-slip insulating layer to assist construction personnel in vertical insertion and lifting operations.

7. A combined guardrail embedded part positioning device according to claim 1, characterized in that, The reference rod (12) has a reference groove engraved at its axial center position. The reference groove is used as a physical reference for the total station to align points or for the steel tape measure to pull distances.

8. A method for positioning and constructing pre-embedded components for a combined guardrail, characterized in that the method... include: S01, determine the pre-embedded position and arrange the main frame horizontally above the projection of the pre-embedded position (1); S02, obtain the vertical projection distribution diagram of the bolts to be buried and the length parameters of each bolt to be buried, and determine the welding position of the positioning component (2) based on the vertical projection distribution diagram and the length parameters, and weld the positioning component (2) to the main frame (1); S03, place the main frame (1) horizontally above the pre-embedded position, and then drive the positioning component (2) vertically downward through the three-dimensional steel mesh layer; S04, perform non-destructive cold bending adjustment on all the reinforcing bars on the travel path of the positioning component (2) and lock them with locking parts; S05, complete the positioning of the embedded parts, and remove the main frame (1) and the positioning component (2) connected to the main frame (1).

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