CN114754751A - Measurement method for straightening of curved tunnels - Google Patents

Abstract

The invention discloses a linear measurement method for a curved tunnel. A benchmark is used for stakeout. One side of the benchmark is fixedly connected to a first insertion rod, the other end of the benchmark is slidably connected to a sliding sleeve, and the bottom of the sliding sleeve is fixedly connected to a second insertion rod. The first plunger and the second plunger are respectively connected with a conical cover, the large end of the conical cover is facing, the benchmark is slidably connected to a sliding seat, the sliding seat is provided with a feeding hopper, and the feeding hopper is filled with lime pink. The invention simplifies the setting out of the arc-shaped tunnel outline by dividing the arc into a plurality of straight segments and setting out in sequence; in the process of sliding the feeding hopper along the benchmark, the feeding hopper gradually leaks lime powder, and the lime powder can be evenly set out , which makes the stakeout operation convenient and fast, and improves the efficiency compared with the arc stakeout.

Description

Measurement method for straightening of curved tunnels

technical field

The invention relates to the technical field of engineering construction, in particular to a linear measurement method for curved tunnels.

Background technique

In engineering construction, the setting out of the tunnel curve section is not only the key and difficult point of the survey work, but also an important link that affects the tunnel penetration accuracy and ensures the quality of the project. The content of tunnel curve stakeout is basically the same as that of off-site curve stakeout. Except for the obvious characteristic points such as straight dots, midpoints, and straight dots of the curve, it is also necessary to measure the curve at certain distances (2m, 3m or any other) on the curve. m) Measure and set the auxiliary points on the circular curve, and then connect these auxiliary points with a smooth curve, so that the shape and position of the curve can be accurately set out on the ground, and the marking of the curve has the defects of low efficiency and easy misalignment.

SUMMARY OF THE INVENTION

The purpose of the present invention is to solve the shortcomings existing in the prior art, and propose a method for measuring the linearization of a curved tunnel, thereby solving the problems existing in the prior art.

In order to achieve the above object, the present invention adopts the following technical solutions:

The straightening measurement method for curved tunnels includes the following steps:

Step 1: Divide the arc of the curved tunnel into n short arcs according to n segments, and obtain the main control point a and the main control point b at both ends of the curved tunnel arc through stakeout, and the short arc end control points are marked C1 and C2 in turn. , ...., the secondary control point c of Cn-1;

Step 2: Calculate the chord length of a single short arc, and use a benchmark to spread lime between two adjacent secondary control points for stakeout.

One side of the above-mentioned benchmark rod is fixedly connected to the first insertion rod, the other end of the benchmark rod is slidably connected to a sliding sleeve, and the bottom of the sliding sleeve is fixedly connected to the second insertion rod.

As a preferred mode of the present invention, the first insertion rod and the second insertion rod are respectively screwed with a conical cover, and the large end of the conical cover faces.

As a preferred mode of the present invention, the benchmark rod is slidably connected to a sliding seat, and the sliding seat is provided with a feeding hopper, and the feeding hopper is filled with lime powder.

As a preferred mode of the present invention, the feeding hopper is rotatably connected to the feeding shaft, the upper end of the feeding hopper is rotatably connected to a ratchet, the ratchet is fixedly connected to the feeding shaft coaxially, and the upper side of the feeding hopper is fixedly connected to the vertical plate, The vertical plate is slidably connected to the step bar, a support spring is arranged between the step bar and the vertical plate, one side of the step bar is unidirectionally connected to the pawl, and the pawl is adapted to the ratchet wheel.

As a preferred mode of the present invention, the lower end of the step rod is fixedly connected to the hanging rod, the lower end of the hanging rod is rotated and connected to the roller, one side of the benchmark is fixedly connected to the wave plate, and the roller contacts the wave surface of the wave plate.

The advantages of the present invention are: the curve tunnel linearization measurement method provided by the present invention simplifies the setting out of the arc tunnel contour line by dividing the arc segment into a plurality of straight line segments and setting out in sequence; In the middle, the lime powder gradually leaks from the feeding hopper, and the lime powder is evenly staked, which makes the stakeout operation convenient and fast, and improves the efficiency compared with the arc stakeout.

Description of drawings

Fig. 1 is the basic principle schematic diagram of the present invention;

Fig. 2 is the structural representation of the benchmark in the present invention;

Fig. 3 is A-A sectional view in Fig. 2;

Figure 4 is a top view of the hopper of the present invention.

Detailed ways

In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but not to limit the present invention.

Example 1

As shown in Figures 1-4, the method for linearizing a curved tunnel provided by the present invention includes the following steps:

Step 1: Divide the arc of the curved tunnel into n short arcs according to n segments, and obtain the main control point a and the main control point b at both ends of the curved tunnel arc through stakeout, and the short arc end control points are marked C1 and C2 in turn. , ...., the secondary control point c of Cn-1;

Step 2: Calculate the chord length of a single short arc, and use Benchmark 1 to scatter lime between two adjacent secondary control points for stakeout.

One side of the above-mentioned benchmark rod 1 is fixedly connected to the first insertion rod 11, the other end of the benchmark rod 1 is slidably connected to the sliding sleeve 12, and the bottom of the sliding sleeve 12 is fixedly connected to the second plugging rod 13. The first plugging rod 11 and the second plugging rod 13 are respectively threadedly connected with The conical cover 14, the big end of the conical cover 14 faces, the first plunger 11 and the second plunger 13 are inserted on two adjacent secondary control points c, and the conical cover 14 contacts the ground so that the first plunger 11 , The second plunger 13 is kept vertical, so that lime powder can be put in with the benchmark 1 as the benchmark.

Benchmark 1 is slidingly connected to sliding seat 2, sliding seat 2 is provided with feeding hopper 3, feeding hopper 3 is filled with lime powder, feeding hopper 3 is rotated and connected to feeding shaft 31, the upper end of feeding hopper 3 is rotated and connected to ratchet wheel 32, and ratchet wheel 32 is connected with feeding shaft. 31 is coaxially fixedly connected, the upper side of the hopper 3 is fixedly connected to the vertical plate 33, the vertical plate 33 is slidably connected to the step bar 34, a support spring 35 is installed between the step bar 34 and the vertical plate 33, and one side of the step bar 34 is connected by one-way rotation The pawl 36, the pawl 36 is adapted to the ratchet wheel 32, the lower end of the step rod 34 is fixedly connected to the hanging rod 37, the lower end of the hanging rod 37 is rotated and connected to the roller 38, the side of the benchmark 1 is fixedly connected to the wave-shaped plate 39, and the roller 38 is in contact with the wave-shaped plate 39. The wave-shaped surface of the plate 39; the principle that the pawl 36 toggles the ratchet wheel 32 to rotate in one direction belongs to the prior art, and will not be repeated here. During the sliding of the hopper 3 along the benchmark 1, the wave-shaped plate 39 cooperates with the supporting spring. 35. Make the boom 37 reciprocate, and by intermittently dialing the ratchet 32, the feeding shaft 31 rotates in one direction to output the lime powder, the lime powder can be evenly set out, and new lime powder will not leak out when the hopper 3 does not move, Therefore, the lime powder can be effectively utilized and the operation is convenient.

The present invention simplifies the setting out of the arc-shaped tunnel outline by dividing the arc into a plurality of straight segments and setting out in sequence; in the process of the feeding hopper 3 sliding along the benchmark 1, the feeding hopper 3 gradually leaks lime powder, and the lime powder can be recovered. Uniform stakeout makes stakeout operation convenient and fast, and improves efficiency compared to arc stakeout.

Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, and substitutions can be made in these embodiments without departing from the principle and spirit of the invention and modifications, the scope of the present invention is defined by the appended claims and their equivalents.

Claims (6)

1. Curved tunnel linearization measurement method, is characterized in that, comprises the steps: Step 1: Divide the arc of the curved tunnel into n short arcs according to n segments, and obtain the main control point a and the main control point b at both ends of the curved tunnel arc through stakeout, and the short arc end control points are marked C1 and C2 in turn. , ...., the secondary control point c of Cn-1; Step 2: Calculate the chord length of a single short arc, and use the benchmark (1) to sprinkle lime between two adjacent secondary control points for stakeout. 2. The method for measuring straightening of a curved tunnel according to claim 1, wherein one side of the benchmark rod (1) is fixedly connected to the first insertion rod (11), and the other end of the benchmark rod (1) is slidably connected to a sliding sleeve (12), the bottom of the sliding sleeve (12) is fixedly connected to the second insertion rod (13). 3. The method for measuring straightening of a curved tunnel according to claim 2, wherein the first insertion rod (11) and the second insertion rod (13) are respectively screwed with a conical cover (14), and the The large end of the conical cover (14) faces. 4. The method for measuring straightening of a curved tunnel according to claim 2, characterized in that: the benchmark (1) is slidably connected to a sliding seat (2), and the sliding seat (2) is provided with a feeding hopper (3), and the The feeding hopper (3) is filled with lime powder. 5. The method for linearizing a curved tunnel according to claim 4, characterized in that: the feeding hopper (3) is rotatably connected to the feeding shaft (31), and the upper end of the feeding hopper (3) is rotatably connected to the ratchet (32). ), the ratchet (32) is coaxially and fixedly connected with the feeding shaft (31), the upper side of the feeding hopper (3) is fixedly connected to the vertical plate (33), and the vertical plate (33) is slidably connected to the step rod (34), A support spring (35) is installed between the step rod (34) and the vertical plate (33), one side of the step rod (34) is unidirectionally connected to the pawl (36), and the pawl (36) is compatible with the ratchet (32). match. 6. The method for measuring straightening of a curved tunnel according to claim 5, wherein the lower end of the step bar (34) is fixedly connected to the hanger rod (37), the lower end of the hanger rod (37) is rotated and connected to the roller (38), and the benchmark rod (1) One side is fixedly connected to the wave-shaped plate (39), and the roller (38) contacts the wave-shaped surface of the wave-shaped plate (39).

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