Guide rail frame for excavation construction of urban rail transit curve section channel

Abstract

The utility model discloses a guide rail frame for excavation construction of a curved section channel of urban rail transit, which comprises a rail frame body, and the rail frame body is formed by encircling a top trapezoidal frame and a bottom trapezoidal frame which are consistent in size and are arranged in parallel up and down, and four upright posts for connecting the top trapezoidal frame and the bottom trapezoidal frame; one straight edge of the top trapezoid frame is provided with a first laser pen fixing groove consistent with the length direction of the top trapezoid frame, and one bevel edge of the top trapezoid frame is provided with a second laser pen fixing groove consistent with the length direction of the top trapezoid frame. The first laser pen fixing groove and the second laser pen fixing groove are each composed of a pair of baffles arranged in parallel and a jacking screw vertically arranged on one baffle in a penetrating mode. The positioning device has the advantages that the curve trend positioning problem of urban rail transit curve section channel excavation construction is easily realized, and the accurate excavation angle of the curve section channel is ensured; meanwhile, the footage length and the transverse excavation width of advancing excavation of each truss of earthwork of the channel can be accurately measured, and the excavation construction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of urban rail transit engineering technology, and in particular to a guide rail frame for the excavation and construction of curved sections of urban rail transit tunnels. Background Technology

[0002] In the excavation and construction of tunnels for urban rail transit projects, the CRD (Cross-Diameter Relief) method is commonly used. However, due to the limited space at the construction site and the large space occupied by construction equipment and earthwork transportation, surveying instruments cannot perform continuous measurements, and when encountering curved sections of the tunnel, it is difficult to effectively control the excavation angle and advance length.

[0003] Current methods typically involve setting up temporary control points behind the excavation face on the invert surface. This method has several drawbacks: First, after each excavation advance, the curved surface obstructs the instrument's view, making measurement impossible and requiring the points to be repositioned. Second, the temporary control points are located on the earthwork transport route; each time earth is transported away, the instrument's location affects traffic, necessitating frequent relocation and re-establishment of the instrument, which is time-consuming and severely impacts construction efficiency. Third, it cannot effectively orient the excavation face or control over- or under-excavation. Therefore, existing technology cannot solve the problem of overlapping operations between surveying instruments, construction transportation, and construction equipment, nor can it achieve efficient measurement and precise control during construction. Summary of the Invention

[0004] The purpose of this utility model is to address the shortcomings of existing technologies by providing a guide rail frame for the excavation and construction of curved sections in urban rail transit.

[0005] To achieve the above objectives, the present invention can adopt the following technical solution:

[0006] The guide rail frame for excavation construction of curved sections in urban rail transit, as described in this utility model, includes a frame-shaped rail frame body. The rail frame body is formed by a top trapezoidal frame and a bottom trapezoidal frame of the same size and arranged parallel to each other, and four columns connecting the top trapezoidal frame and the bottom trapezoidal frame. A first laser pointer fixing groove is provided on one straight side of the top trapezoidal frame, which is aligned with its length direction. A second laser pointer fixing groove is provided on one inclined side of the top trapezoidal frame, which is aligned with its length direction. The first laser pointer fixing groove and the second laser pointer fixing groove have the same structure, each consisting of a pair of parallel baffles and a tightening screw that is vertically inserted through one of the baffles.

[0007] Furthermore, for ease of material sourcing, the top trapezoidal frame, the bottom trapezoidal frame, and the column can all be made of angle steel with an outer surface coated with anti-rust paint.

[0008] Furthermore, to facilitate leveling of the entire rail frame, a level can be installed on the top trapezoidal frame.

[0009] Furthermore, to facilitate the fitting and fixing of the end faces of the two rail frame bodies arranged side by side during actual use, first horizontal connecting holes can be symmetrically opened on the two inclined sides of the top trapezoidal frame, and second horizontal connecting holes can be symmetrically opened on the two inclined sides of the bottom trapezoidal frame, so that the end faces of the two rail frame bodies can be easily fitted and connected by bolt assemblies.

[0010] Furthermore, to ensure that the rail frame body can be placed stably during actual use, multiple vertical fixing holes can be evenly distributed on the bottom trapezoidal frame, so that T-shaped fixing nails can pass through the vertical fixing holes and penetrate into the ground soil of the excavated channel, easily achieving the fixing of the rail frame body.

[0011] The advantages of this invention lie in its ability to easily locate the curve direction during the excavation of curved sections of urban rail transit tunnels through the continuous arrangement of multiple track frame bodies, ensuring accurate excavation angles. Simultaneously, it utilizes a first and a second laser pointer fixing slot to fix the laser pointers, allowing one laser pointer to maintain horizontal forward illumination based on the current position of the track frame body, and the other laser pointer to maintain horizontal lateral illumination based on the current position of the track frame body. This accurately measures the advance length and lateral excavation width of each section of earthwork in the tunnel, avoiding measurement errors caused by obstructed vision or inaccurate temporary control points. It also reduces interference from construction equipment and earthwork transportation, avoids frequent movement of instruments and equipment, and improves the construction efficiency of curved section excavation in urban rail transit. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of this utility model.

[0013] Figure 2 yes Figure 1 Top view.

[0014] Figure 3 yes Figure 1 The left view.

[0015] Figure 4 This is a reference diagram showing the usage state of this utility model. Detailed Implementation

[0016] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0017] like Figure 1-3 As shown, the guide rail frame for the excavation and construction of curved sections in urban rail transit, as described in this utility model, includes a frame-shaped rail frame body 1. This rail frame body is formed by a top trapezoidal frame 1.1 and a bottom trapezoidal frame 1.2 of the same size and arranged parallel to each other, and four columns 1.3 connecting the top trapezoidal frame 1.1 and the bottom trapezoidal frame 1.2. The whole structure forms a trapezoidal frame structure. When multiple rail frame bodies 1 are arranged end-to-end, all the rail frame bodies 1 can form an approximately arc-shaped arrangement (e.g., ...). Figure 4 (As shown). To facilitate on-site material sourcing and processing, the top trapezoidal frame 1.1, the bottom trapezoidal frame 1.2, and the column 1.3 are all welded from angle steel, and the outer surface of all angle steel is coated with anti-rust paint to extend their service life.

[0018] A first laser pointer fixing slot 2 and a second laser pointer fixing slot 3 are provided on the top trapezoidal frame 1.1 for fixing a laser pointer to measure straight distance. The first laser pointer fixing slot 2 is composed of a pair of parallel first baffles 2.1 and a first tightening screw 2.2 that is perpendicularly inserted through one of the first baffles 2.1. The second laser pointer fixing slot 3 is composed of a pair of parallel second baffles 3.1 and a second tightening screw 3.2 that is perpendicularly inserted through one of the second baffles 3.1. The two have the same structure.

[0019] When setting up the first laser pointer fixing slot 2 and the second laser pointer fixing slot 3, specifically, the two parallel sides of the top trapezoidal frame 1.1 are defined as straight sides, and the two waists are defined as hypotenuses. At this time, the first laser pointer fixing slot 2 is set on one of the straight sides of the top trapezoidal frame 1.1, and the length direction of its slot cavity should be consistent with the length direction of the straight side, so that the laser pointer installed in the first laser pointer fixing slot 2 can be horizontally forward along the straight side to measure the excavation depth of each section of the urban rail transit curved channel; while the second laser pointer fixing slot 3 is set on one of the hypotenuses of the top trapezoidal frame 1.1, and the length direction of its slot cavity should be consistent with the length direction of the hypotenuse, so that the laser pointer installed in the second laser pointer fixing slot 3 can be horizontally transverse along the hypotenuse to cooperate with the laser pointer in the first laser pointer fixing slot 2 to measure the width of each excavated channel.

[0020] In addition, to facilitate leveling of the entire rail frame body 1 during actual operation, a level 4 can be installed on the top trapezoidal frame 1.1. The level 4 can easily measure whether the rail frame body 1 is level.

[0021] To facilitate the end-to-end connection of two adjacent rail frame bodies 1 arranged end-to-end during actual use, first horizontal connecting holes 5 can be symmetrically opened on the two inclined sides of the top trapezoidal frame 1.1, and second horizontal connecting holes 6 can be symmetrically opened on the two inclined sides of the bottom trapezoidal frame 1.2. Thus, the end-to-end connection of two adjacent rail frame bodies 1 can be easily achieved through bolt assembly.

[0022] To ensure that each rail frame body 1 can be stably placed on the ground of the excavated channel of urban rail transit during actual use, multiple vertical fixing holes 7 can be evenly distributed on the bottom trapezoidal frame 1.2, so that T-shaped fixing nails can pass through the vertical fixing holes 7 and penetrate into the ground soil of the excavated channel, so as to easily fix the rail frame body 1.

[0023] like Figure 4 As shown, during actual construction: First, use a total station to lay out the position of the first rail frame body 1' at the starting point of the channel curve at four points, and place the rail frame body 1' according to the laid-out points. Level it according to the level 4 on the rail frame body 1'. After the rail frame body 1' is leveled, use T-shaped fixing nails to drive into the vertical fixing holes 7, and then fix the rail frame body 1'.

[0024] The second step involves placing two laser pointers into the first laser pointer fixing slot 2 and the second laser pointer fixing slot 3 on the rail frame body 1', respectively, and fixing the laser pointers using the first tightening screw 2.2 and the second tightening screw 3.2. The laser pointer in the first laser pointer fixing slot 2 shines horizontally forward (i.e., towards the depth of the channel), and the laser pointer in the second laser pointer fixing slot 3 shines horizontally laterally (i.e., towards the width of the channel). At this time, a right-angle ruler is placed in front of the laser beams emitted by the laser pointers, and the laser angle is adjusted according to the right-angle ruler so that the upper and lower laser beams coincide with the vertical edge of the right-angle ruler, thereby ensuring that the laser beams are vertical and not tilted.

[0025] The third step involves taking the front end of the rail frame body 1' as the starting point and measuring the next excavation length along the horizontally forward-shielding laser beam. Using the horizontally shone laser beam as a reference line, and based on the offset relationship between the previous grid and this grid, the fixed offset value is measured laterally as the excavation width of the horizontal excavation surface. After the construction of this grid is completed, the second rail frame body 1'' is attached and fixed to the front end of the previous rail frame body 1' using bolt assemblies, ensuring that the rail frame body 1'' is installed flat. Then, the third step is repeated on the rail frame body 1'' to excavate the next section of earthwork.

[0026] Two sets of track frames are used in a cyclical manner, with each pair checked with a total station to ensure their position remains unchanged during construction. This easily solves the problem of positioning the curve direction during the excavation of curved sections of urban rail transit tunnels, ensuring accurate excavation angles for curved sections, accurately measuring the advance length and lateral excavation width of each tunnel frame, avoiding measurement errors caused by obstructed views or inaccurate temporary control points, reducing interference from construction equipment and earthwork transportation, avoiding frequent movement of instruments and equipment, and improving the construction efficiency of curved section excavation for urban rail transit.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature.

Claims

1. A guide rail frame for excavation and construction of curved sections in urban rail transit, characterized in that: The system includes a frame-shaped rail frame body, which is formed by a top trapezoidal frame and a bottom trapezoidal frame of the same size and arranged parallel to each other, and four columns connecting the top trapezoidal frame and the bottom trapezoidal frame. A first laser pointer fixing groove is provided on one straight side of the top trapezoidal frame, which is aligned with its length direction. A second laser pointer fixing groove is provided on one inclined side of the top trapezoidal frame, which is aligned with its length direction. The first laser pointer fixing groove and the second laser pointer fixing groove have the same structure, each consisting of a pair of parallel baffles and a tightening screw that passes vertically through one of the baffles.

2. The guide rail frame for excavation construction of curved sections in urban rail transit according to claim 1, characterized in that: The top trapezoidal frame, the bottom trapezoidal frame, and the column are all made of angle steel with rust-proof paint coated on the outer surface.

3. The guide rail frame for excavation construction of curved sections in urban rail transit according to claim 1, characterized in that: A level is installed on the top trapezoidal frame.

4. The guide rail frame for excavation construction of curved sections of urban rail transit according to claim 1, characterized in that: A first horizontal connecting hole is symmetrically provided on the two inclined sides of the top trapezoidal frame, and a second horizontal connecting hole is symmetrically provided on the two inclined sides of the bottom trapezoidal frame.

5. The guide rail frame for excavation construction of curved sections in urban rail transit according to claim 1, characterized in that: Multiple vertical fixing holes are evenly distributed on the bottom trapezoidal frame.

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