Simple tool for marking pile position coordinates of MJS method pile
By designing a simple tool that combines I-beams and positioning reinforcement bars, the problem of cumbersome and inaccurate pile location marking in the MJS method was solved, enabling rapid and accurate pile location identification and re-measurement, thus improving construction efficiency and accuracy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SINOHYDRO BUREAU 14 CO LTD
- Filing Date
- 2025-10-16
- Publication Date
- 2026-08-04
AI Technical Summary
The process of re-aligning and verifying the pile position before grouting for MJS method piles is cumbersome and the accuracy is difficult to guarantee, which affects construction efficiency and precision.
Design a simple tool that includes an I-beam and positioning bars. One end of the I-beam is triangular, and two positioning bars are fixedly connected by holes at 150mm and 450mm from the end, respectively. The lower end of the positioning bars is a cone structure, which is used to quickly mark and stabilize the pile position coordinates.
It enables efficient and accurate marking of pile positions using the MJS method, improving construction efficiency and positioning accuracy. It is simple to operate, low in cost, and suitable for various geological conditions.
Smart Images

Figure CN224593971U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of municipal engineering construction technology, specifically relating to a simple tool for marking the coordinates of MJS method piles. Background Technology
[0002] Currently, the application of underpass tunnels in urban areas is becoming increasingly widespread. However, it is necessary to consider the protection of other structures during tunnel construction. MJS method piles are often used for the construction of retaining structures in open-cut tunnels in urban areas where there are existing structures nearby due to their low disturbance to the soil. However, because MJS method piles are constructed using different equipment for drilling and grouting, the pile positions need to be re-aligned and checked before grouting, which is not only cumbersome but also makes it difficult to ensure accuracy. Utility Model Content
[0003] The technical problem to be solved by this utility model is to provide a simple tool for marking the coordinates of piles in the MJS method, which is simple in structure, easy to use, and applicable to various geological conditions.
[0004] The technical solution of this utility model is: a simple tool for marking the coordinates of MJS method piles, comprising: an I-beam and positioning reinforcing bars. One end of the I-beam is triangular, and two positioning reinforcing bars are provided at the other end of the I-beam. The two positioning reinforcing bars are vertically fixed to the I-beam. One of the positioning reinforcing bars is 150mm away from the end of the I-beam, and the other positioning reinforcing bar is 450mm away from the end of the I-beam.
[0005] Furthermore, two holes are opened at one end of the I-beam, the two holes being 150mm and 450mm away from the end of the I-beam respectively, and the diameter of the holes is 25mm. The positioning steel bar is inserted into the holes and fixedly connected to the I-beam.
[0006] Furthermore, the I-beam is 1000mm long, and the positioning rebar is 300mm long.
[0007] Furthermore, the lower 50mm of the positioning steel bar has a conical structure.
[0008] The beneficial effects of this utility model are: This utility model achieves efficient and accurate marking of MJS method pile positions through a simple combination of I-beams and positioning reinforcing bars. The I-beam has two holes at its end, spaced 150mm and 450mm apart, for inserting and fixing two positioning reinforcing bars, providing a clear coordinate reference for the pile position marking point. The lower end of the positioning reinforcing bars has a conical structure for stable insertion into the ground, improving overall resistance to displacement. This tool is simple in structure, easy to manufacture, and inexpensive. Operators can quickly set up and disassemble it, significantly improving the efficiency of construction layout and re-measurement. Its standardized length and positioning spacing design facilitates repeated measurements and coordinate verification, ensuring high pile position positioning accuracy and good re-measurement consistency, demonstrating good versatility and promotional value. Attached Figure Description
[0009] Figure 1 This is a schematic diagram of the structure of a simple tool for marking the coordinates of pile positions in the MJS method.
[0010] Figure 2 This is a schematic diagram of the planar structure of a simple tool for marking the coordinates of pile positions in the MJS method.
[0011] Figure 3 This is a schematic diagram of the positioning reinforcement of a simple tool for marking the pile position coordinates of MJS method piles according to this utility model.
[0012] In the diagram: 1-I-beam, 2-positioning reinforcing bar. Detailed Implementation
[0013] like Figure 1-3 As shown, a simple tool for marking the coordinates of MJS method piles includes: an I-beam 1 and positioning reinforcing bars 2. One end of the I-beam 1 is triangular (100mm is taken from one end of the I-beam, the two side flanges are removed, and the web is sharpened into a triangle). Two positioning reinforcing bars 2 are provided at the other end of the I-beam 1. The two positioning reinforcing bars 2 are vertically fixed to the I-beam 1. One of the positioning reinforcing bars 2 is 150mm away from the end of the I-beam 1, and the other positioning reinforcing bar 2 is 450mm away from the end of the I-beam 1.
[0014] Preferably, one end of the I-beam 1 has two holes, which are located 150mm and 450mm from the end of the I-beam 1, respectively. The diameter of the holes is 25mm. The positioning steel bar 2 is inserted into the holes and fixedly connected to the I-beam 1.
[0015] Preferably, the I-beam 1 is 1000mm long and the positioning steel bar 2 is 300mm long.
[0016] Preferably, the lower 50mm end of the positioning steel bar 2 has a conical structure.
[0017] When using it, the construction personnel first determine the coordinate points of the pile position of the MJS method pile based on the measurement data, point the triangular end of the I-beam 1 towards the measurement direction, and then insert two positioning steel bars 2 vertically into the ground to keep the I-beam 1 in a horizontal position. At this time, the two fixed points on the I-beam correspond to the coordinate reference points of the pile position, so that the pile position can be quickly calibrated.
[0018] Through the above structural design, this utility model can achieve rapid, accurate and verifiable pile location marking on site. Compared with the traditional method of marking with wooden piles, chalk or string, it has significant advantages such as simple structure, high precision and strong reusability.
[0019] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A simple tool for marking the coordinates of MJS method piles, characterized in that, include: I-beam (1) and positioning steel bars (2), one end of the I-beam (1) is triangular, and two positioning steel bars (2) are provided at the other end of the I-beam (1). The two positioning steel bars (2) are vertically fixedly connected to the I-beam (1). One of the positioning steel bars (2) is 150mm away from the end of the I-beam (1), and the other positioning steel bar (2) is 450mm away from the end of the I-beam (1).
2. The simple tool for marking the coordinates of MJS method piles according to claim 1, characterized in that, Two holes are opened at one end of the I-beam (1), the two holes are 150mm and 450mm away from the end of the I-beam (1) respectively, and the diameter of the holes is 25mm. The positioning steel bar (2) is inserted into the holes and fixedly connected to the I-beam (1).
3. The simple tool for marking the coordinates of MJS method piles according to claim 1, characterized in that, The I-beam (1) is 1000mm long and the positioning steel bar (2) is 300mm long.
4. A simple tool for marking the coordinates of MJS method piles according to claim 1, characterized in that, The lower end of the positioning steel bar (2) is a cone structure at 50mm.