CN-122014001-A - 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, a positioning assembly and a control assembly, wherein the main frame comprises a plurality of frame square steel pipes which are connected with each other and a reference rod which is connected with the frame square steel pipes, the outer contour of the main frame is identical to the outer contour of a guardrail embedded part, the reference rod coincides with the geometric center line of the frame of the main frame, and the positioning assembly is vertically connected and fixed on the main frame and is used for simulating the design position and the length of a bolt to be buried. The device can realize nondestructive avoidance and space locking of conflict reinforcing steel bars on the premise of not damaging the structural integrity of the main reinforcing steel bars, remarkably improves the overall safety and reliability of the guardrail, and meanwhile, can ensure the high consistency of the embedded position and the design space, improves the construction standardization level and reduces the construction cost.

Inventors

• CAO ZHI
• KE WEIPENG
• Tang Yinting
• ZHANG JIANGUO
• Guo Ruowen
• ZHANG XIAOJUN
• SHENG JUNWEI
• TANG JINGYUAN
• YU QI
• XU YANG

Assignees

• 浙江交工集团股份有限公司
• 浙江宁波杭甬复线三期高速公路有限公司

Dates

Publication Date

20260512

Application Date

20260309

Claims (8)

1. 1. A modular guardrail built-in fitting positioner, wherein, the device includes: The guardrail embedded part comprises a main frame (1), wherein the main frame (1) comprises a plurality of mutually connected frame square steel pipes (11) and a datum 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 of the guardrail embedded part in size, and the datum rod (12) is overlapped with the geometric center line of the frame of the main frame (1); The positioning assembly (2) is vertically connected and fixed on the main frame (1) and used for simulating the design position and length of the bolt to be buried.
2. 2. The combined type guardrail embedded part positioning device according to claim 1, wherein the positioning assembly (2) comprises a plurality of thin-wall hollow pipes (21) for insertion positioning and a connecting rod (22) welded at the top end of the thin-wall hollow pipes (21), and the outer diameter of the thin-wall hollow pipes (21) is larger than the diameter of a bolt to be embedded.
3. 3. The combined type guardrail embedded part positioning device according to claim 2, wherein the positioning assembly (2) further comprises a conical guide head (23) arranged at the bottom end of the thin-wall hollow pipe (21), and the conical guide head (23) is used for guiding the thin-wall hollow pipe to penetrate through a steel bar mesh gap in the self-weight falling process.
4. 4. The combined type guardrail embedded part positioning device according to claim 1, wherein scale marks are arranged on the surface of the square steel tube (11) of the frame and are used for assisting in observing the horizontal offset of the positioning assembly (2).
5. 5. The combined guardrail embedded part positioning device according to claim 1, wherein a horizontal bubble calibrator (3) is installed on the upper surfaces of the frame square steel pipe (11) and the reference rod (12), and the horizontal bubble calibrator (3) is used for monitoring levelness of the main frame (1) after being placed.
6. 6. The combined type guardrail embedded part positioning device according to claim 1, wherein an operating handle (4) is arranged at the top of the square steel tube (11) of the frame, and an anti-slip insulating layer is coated outside the operating handle (4) and used for assisting constructors in carrying out vertical sleeving and lifting operations.
7. 7. The combined type guardrail embedded part positioning device according to claim 1, wherein a reference groove is carved on the axis position of the reference rod (12), and the reference groove is used for a physical reference of total station point or steel tape pull distance.
8. 8. The combined type guardrail embedded part positioning construction method is characterized by comprising the following steps of: s01, determining an embedded position and horizontally arranging a main frame (1) right above projection of the embedded position; s02, acquiring a vertical projection distribution diagram of a bolt to be buried and length parameters of each bolt to be buried, determining a welding position of a positioning assembly (2) based on the vertical projection distribution diagram and the length parameters, and welding the positioning assembly (2) to the main frame (1); s03, horizontally overlapping the main frame (1) above the embedded position, and then driving the positioning assembly (2) to vertically penetrate the three-dimensional reinforcing steel bar mesh layer downwards; S04, carrying out nondestructive cold bending adjustment on all the steel bars on the travelling path of the positioning assembly (2) and locking by using a locking piece; S05, completing embedded part positioning, and removing the main frame (1) and the positioning assembly (2) connected with the main frame (1).

Description

Combined type guardrail embedded part positioning device and construction method Technical Field 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. Background In the construction of traffic infrastructure, combined concrete crash barriers are widely used because of their combined rigidity of concrete and toughness of steel barriers, and the structural stability of such barriers is highly dependent on the reliable anchoring of the bottom base steel bars to the upper steel barrier column embedments (including pre-embedded steel plates and high strength anchor bolts). However, because the arrangement of the steel bars in the guardrail base is extremely fine, the construction site environment is complex, serious physical space conflict often exists between the accurate positioning of the embedded parts and the dense steel bar meshes, and how to realize high-precision and standardized installation of the heavy embedded parts on the premise of ensuring that the structural integrity of the main steel bars is not damaged becomes a key subject for restricting the construction quality and the work efficiency of the guardrail. In the prior art, the conventional processing method for the conflict between the embedded part and the steel bar mainly comprises the steps of directly cutting off the base steel bar at the conflict position when the position of the embedded bolt is found to be blocked by the steel bar, welding the reinforcing steel bar after the embedded part is in place, and finely adjusting the installation position of the embedded part to avoid the steel bar under the condition of not changing the steel bar. In addition, in the construction process, a real object embedded part with larger design weight is usually required to be directly lifted and installed, and manual alignment, calibration and fixation are carried out in the installation process. The prior art has obvious defects. Firstly, the method for cutting and reinforcing the steel bars weakens the original strength of the guardrail steel bars at the positions of the embedded parts to a great extent, the heat affected zone generated by welding can change the mechanical properties of the steel bars and reduce the anti-collision energy level of the guardrail, secondly, the method for shifting the positions of the embedded parts can cause the difference of the embedded intervals at each position, the construction standardization requirement cannot be met, the next procedure must customize non-standard steel guardrail beams again according to the actual intervals, the production cost and the workload are greatly increased, and furthermore, due to the huge dead weight of the real embedded parts, the repeated position adjustment in dense steel bar meshes has extremely high labor intensity, millimeter-level precision control is extremely difficult to realize, and the construction work efficiency is seriously affected. Disclosure of Invention The invention aims to provide a combined type guardrail embedded part positioning device and a construction method, which can realize nondestructive avoidance and space locking of conflict reinforcing steel bars on the premise of not damaging the structural integrity of main reinforcing steel bars, and remarkably improve the safety and reliability of the whole guardrail. In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: In a first aspect, the present invention provides a combined guard rail embedded part positioning device, including: The guardrail embedded part comprises a main frame, a guardrail embedded part and a support frame, wherein the main frame comprises a plurality of mutually connected frame square steel pipes and a reference rod connected to the frame square steel pipes; the positioning assembly is vertically connected and fixed on the main frame and used for simulating the design position and length of the bolt to be buried. The main frame consists of a plurality of frame square steel pipes which are mutually connected in a welding mode, a connecting piece fixing mode and the like to form a rigid rectangular frame, the outer contour size of the frame is identical to the outer contour size of the guardrail embedded part to be installed, and the main frame becomes an accurate occupation model. During construction, the main frame can be placed at the design position in a collision-free manner, so that the real object embedded part can be positioned in space. The frame square steel pipe is welded with a reference rod, the axis of the reference rod coincides with the geometric center line of the frame of the main frame, the reference rod is used as a spine of the whole device, the structural strength of the main frame can be enhanced, and in addition, the coincidence of the reference rod and the geometric center line can ensure the posit