Small-diameter sharp curve shield tunnel narrow space wire transmission device and method

Abstract

The invention relates to a small-diameter sharp curve shield tunnel narrow space wire transmission device and method, a laser centering base is fixed to a welding support at the top of a trolley through a center screw, a vertical laser beam of the laser centering base penetrates through the center screw to be projected to a lower laser target board, and coordinate transmission is achieved by projecting vertical laser from top to bottom; the laser vertical plumbing instrument and the target prism are fixed to the welding support through the forced centering disc, a vertical laser beam of the laser vertical plumbing instrument projects vertical laser to the laser target plate from the welding support below, and coordinate transmission is achieved by projecting the vertical laser from bottom to top. Point position transmission adopted by the method is direct and rapid, the complexity of one-station transmission of the wire in a narrow space at the top of the trolley is avoided, and the problems that the observation sight is blocked, the observation distance is short, and the number of observation stations is increased and the precision is reduced due to insufficient space at the top of the trolley when the wire is measured due to shield tunneling into a small-turning-radius sharp curve line type are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of engineering survey for wire transfer in shield tunnels, and specifically to a device and method for wire transfer in a narrow space of a small-diameter sharp-curve shield tunnel. Background Art

[0002] With the acceleration of the urbanization process, urban buildings are becoming increasingly diverse, and the demand for underground engineering is also growing. In underground engineering, not only complex geological conditions need to be dealt with, but also the impact on surface buildings needs to be considered. Therefore, tunnel routes are often designed in a curved form to avoid buildings. However, small-diameter, small-radius sharp-turn curves pose challenges to engineering construction, especially in engineering surveying.

[0003] Engineering survey plays a crucial role in tunnel route design, especially in designs containing sharp-curve sections. When the shield machine and its trolley enter the sharp-curve area, the survey work is particularly critical, which is directly related to the construction accuracy, safety, and efficiency. However, the difficulty in shield construction survey lies in that the space on the top of the trolley is narrow and is covered with oil pipelines and belt conveyor equipment, which further limits the survey space and increases the survey difficulty.

[0004] In the sharp-curve section, the survey observation distance is shortened, and more survey stations and turning points need to be set, which not only increases the labor intensity of surveyors but also may affect the accuracy of the wire, thus bringing potential risks to project quality and safety. To meet the design requirements of shield construction, it is particularly urgent to research and develop survey methods that adapt to engineering needs.

[0005] Currently, total station is mainly used for the transfer of plane coordinates in tunnel wire survey. Total station survey requires angular and distance measurements, while wire survey should minimize the number of survey stations and increase the observation distance. Therefore, tunnel wire survey needs to be continuously innovated and combined with multiple methods to complete the survey task. In special cases such as small diameter, small radius, and sharp curves, traditional survey methods are time-consuming and laborious when transferring the wire from the top of the trolley towards the shield machine, and the risk factor is high when operating beside the belt conveyor, seriously affecting the survey progress.

[0006] Therefore, how to provide a wire transfer method that can simplify the work process and shorten the survey time in the narrow space on the top of the trolley has become an urgent problem to be solved in the current technical field. Summary of the Invention

[0007] In order to solve the problems that when the shield tunneling reaches the small turning radius sharp curve linear type, the observation line of sight is blocked during the traverse survey, the observation distance is short, the space at the top of the jumbo is insufficient, resulting in an increase in the number of survey stations and a decrease in accuracy, the present invention provides a device and method for transferring traverse in a narrow space of a small-diameter sharp curve shield tunnel, which can solve the problem of reducing the number of observation stations, increasing the observation distance, and reducing the observation time during the process of transferring coordinates to the measurement suspension point. The device and method are convenient to operate and simple in structure, and can quickly and efficiently complete the traverse measurement and transfer work, ensuring the construction progress and construction quality.

[0008] To achieve the above object, the technical solution adopted by the present invention is: a device for transferring traverse in a narrow space of a small-diameter sharp curve shield tunnel, which is characterized by comprising: a total station, a laser centering base, a welding bracket reserved bolt hole, a welding bracket, a center screw, a reflector, a laser target board, a fixed target board screw, a target prism, a movable forced centering tripod, a laser vertical point projector, and a forced centering plate;

[0009] The laser centering base is fixed on the welding bracket at the top of the jumbo through the center screw, and its vertical laser beam passes through the center screw and projects onto the laser target board below. By projecting vertical laser from top to bottom, coordinate transfer is achieved;

[0010] The laser vertical point projector and the target prism are fixed on the welding bracket through the forced centering plate. The vertical laser beam of the laser vertical point projector projects vertical laser from below the welding bracket onto the laser target board. By projecting vertical laser from bottom to top, coordinate transfer is achieved.

[0011] Further, the center screw is a hollow rod. The center screw is used to fix the laser centering base on the welding bracket and level the laser centering base; the welding bracket is welded and fixed at the top and lower plane positions of the jumbo, and is used to fix the laser centering base and the total station for traverse point transfer.

[0012] Further, for the total station, the total station instrument is set up at a known point. According to the coordinates of the survey station and the orientation point or the orientation distance and azimuth angle, any target point is observed to obtain the three-dimensional coordinate value of the target point, and the distance information and azimuth information are transferred from the known orientation side to the unknown side to achieve the purpose of orientation.

[0013] Further, the movable forced centering tripod is used for the transfer of the point coordinates at the middle passage under the jumbo. During the traverse transfer process, stations can be set randomly, and after the transfer of the point coordinates is completed, it can be removed at any time without affecting the passage of construction vehicles.

[0014] Further, the target prism and the reflector are used as the observation targets during the total station measurement and are used in combination with the total station. The reflector is used for measuring the target coordinates of the laser point projected on the laser target board.

[0015] Furthermore, the laser alignment base is fixed to the welding bracket on the top of the trolley and is not disassembled with the total station. Firstly, it facilitates the erection of the total station. Secondly, the laser alignment base provides a vertical laser beam for the transfer of the upper and lower coordinate points of the trolley. By measuring the coordinates of the laser point projected by the laser alignment base onto the laser target plate below, the purpose of coordinate transfer up and down can be achieved.

[0016] Furthermore, for the laser vertical point projector, a forced centering plate is fixed on the welding bracket at the lower part of the trolley. Firstly, it provides a target for the total station for the erection of the prism. Secondly, it erects the laser vertical point projector to provide a vertical laser beam for the transfer of the upper and lower coordinate points of the trolley. The laser point projected by the laser vertical point projector onto the laser target plate above is used to achieve the purpose of coordinate transfer up and down.

[0017] Furthermore, for the forced centering plate, the total station is directly erected and leveled at the point position, and it is used as a reference point after the point measurement is completed.

[0018] A method for a wire transfer device in a narrow space of a small-diameter sharp-curve shield tunnel, which adopts the method of projecting a vertical laser from top to bottom, and the specific steps are as follows:

[0019] Step 1: Weld brackets at the corresponding upper and lower positions of two locations on the trolley, fix the laser alignment base on the upper welding bracket of the trolley with a central screw, and level the laser alignment base.

[0020] Step 2: The vertical laser beam of the laser alignment base passes through the central screw and projects a vertical laser from the upper part to the laser target plate below, and mark the point where the laser beam of the laser alignment base projects on the laser target plate.

[0021] Step 3: Use the total station to transfer the wire measurement point coordinates to the vicinity of the laser target plate, use a movable forced centering tripod as the transfer point of the wire point position, and use the movable forced centering tripod as the reference point, and the point where the laser alignment base vertically projects onto the laser target plate can be directly observed.

[0022] Step 4: Stand the reflector at the marked position on the laser target plate, and the total station observes the coordinates of the laser target plate point. Because the laser beam is vertical, observing the coordinates of the laser target plate point is the point coordinates of the top laser alignment base. Set up the body of the total station at the measurement point of the laser alignment base, so that the total station and the laser alignment base form a whole, and the coordinates of this point can be directly applied to complete the measurement work.

[0023] A method for a wire transfer device in a narrow space of a small-diameter sharp-curve shield tunnel, which adopts the method of projecting a vertical laser from bottom to top, and the specific steps are as follows:

[0024] Step 1: Fix the forced centering plate component on the lower welding bracket for mounting the laser vertical point projector and the prism.

[0025] Step 2: Use a total station to transfer the coordinate of the traverse survey point to the vicinity of the lower welding bracket. Use a movable forced centering tripod as the transfer point of the traverse point. Taking the movable forced centering tripod as the reference point, the prism mounted on the forced centering plate can be directly observed.

[0026] Step 3: Mount the prism on the forced centering plate. The total station observes the coordinate of the prism point. After the observation of the prism coordinate is completed, mount the laser vertical point projector.

[0027] Step 4: The vertical laser beam of the laser vertical point projector can project vertical laser onto the laser target plate of the upper welding bracket, mark the point where the laser beam of the laser vertical point projector projects on the laser target plate. The laser vertical point projector can provide a vertical laser beam for the transfer of the upper and lower coordinate points of the trolley. The laser point projected by the laser vertical point projector onto the upper laser target plate is equivalent to directly projecting the coordinate point of the forced centering point at the lower part of the trolley onto the laser target plate, completing the up and down transfer of the measurement coordinate.

[0028] The beneficial effects of the present invention are as follows:

[0029] The present invention adopts a direct and fast point transfer method, avoiding the cumbersome process of transferring stations one by one for the traverse in the narrow space at the top of the trolley, solving the problems of blocked observation line of sight, short observation distance, increased number of stations and decreased accuracy during traverse survey when the shield tunneling reaches the sharp curve with a small turning radius, and insufficient space at the top of the trolley. The method adopted can reduce the number of observation stations, increase the observation distance and reduce the observation time during the process of measuring the traverse and transferring the coordinates to the measurement suspension point in this area. The method has the advantages of convenient operation, simple structure, can quickly and efficiently complete the traverse measurement and transfer work, ensure the construction progress and quality, and can also reduce the number of stations, greatly saving time.

[0030] The innovation points of the present invention are as follows:

[0031] (1) Realize the direct correlation of the upper and lower layer coordinates of the trolley through laser vertical projection, breaking through the limitation of the narrow space; (2) The movable forced centering tripod realizes the integrated operation of "setting up a station - measuring - removing a station", ensuring the smoothness of the construction passage.

[0032] The innovation of the present invention compared with the prior art:

[0033]

[0034] Description of the Drawings

[0035] Figure 1It is a schematic diagram of a wire transfer device and method applied to a narrow space of a small-diameter sharp-curve shield tunnel in the first embodiment of the present invention (projecting a vertical laser from top to bottom);

[0036] Figure 2 It is a schematic diagram of the laser centering base in the first embodiment of the present invention;

[0037] Figure 3 It is a schematic diagram of a device for measuring the position of a laser target board by a total station in the first embodiment of the present invention;

[0038] Figure 4 It is a flowchart of a method for wire transfer applied to a narrow space of a small-diameter sharp-curve shield tunnel in the first embodiment of the present invention;

[0039] Figure 5 It is a schematic diagram of a wire transfer device and method applied to a narrow space of a small-diameter sharp-curve shield tunnel in the second embodiment of the present invention (projecting a vertical laser from bottom to top);

[0040] Figure 6 It is a schematic diagram of a laser vertical point projector in the second embodiment of the present invention;

[0041] Figure 7 It is a schematic diagram of a device for measuring the position of a target prism by a total station in the second embodiment of the present invention;

[0042] Figure 8 It is a schematic diagram of the total station 1S being installed on the measurement suspension point at a high position of the trolley in the second embodiment of the present invention;

[0043] Figure 9 It is a flowchart of a method for wire transfer applied to a narrow space of a small-diameter sharp-curve shield tunnel in the second embodiment of the present invention;

[0044] In the figure: 1. Total station (1S, 1X), 2. Laser centering base, 3. Reserved bolt holes for welding brackets, 4. Welding brackets (4S, 4X), 5. Central screw, 6. Reflective sheet, 7. Laser target board, 8. Fixed target board screw, 9. Target prism A, 10. Movable forced centering tripod A, 11. Movable forced centering tripod B, 12. Target prism B, 13. Laser vertical point projector, 14. Forced centering plate. Detailed implementation method

[0045] The implementation method of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0046] As Figures 1 to 4As shown in the figure, the wire transfer device for a narrow space of a small-diameter sharp-curve shield tunnel in the first embodiment of the present invention (projecting vertical laser from top to bottom) includes total stations 1S and 1X, a laser centering base 2, reserved bolt holes 3 for welding brackets, welding brackets 4S and 4X, a central screw 5, a reflector 6, a laser target board 7, a fixing target board screw 8, a target prism 9, and movable forced centering tripods A and B 10, 11.

[0047] The central screw 5 is a hollow rod. The central screw 5 is used to fix the laser centering base 2 on the welding brackets 4S and 4X, level the laser centering base 2. The vertical laser beam of the laser centering base 2 can pass through the central screw and project vertical laser from a high place downward onto the laser target board 7, marking the point where the laser beam of the laser centering base 2 projects onto the laser target board 7. When the total station transfers the coordinate of the wire measurement point to the movable forced centering tripod near the laser target board, at this time, the total stations 1S and 1X are set up on the movable forced centering tripod, and the point where the laser centering base 2 vertically projects onto the laser target board 7 can be directly observed. Stand the reflector 6 at the marked position on the laser target board 7, and the total station observes the coordinate of the laser target board 7. Since the laser beam is vertical, observing the plane coordinate of the laser target board 7 is the central point coordinate of the top laser centering base. Through the projected point coordinates, then set up the total station on the laser centering base 2, and measure the coordinate of the subsequent measurement suspension point and complete the measurement work.

[0048] For the total stations 1S and 1X, set up the total station instrument at a known point. According to the coordinates of the measuring station and the orientation point or the orientation distance and azimuth angle, observe any target point to obtain the three-dimensional coordinate value of the target point, and transfer the distance information and azimuth information from the known orientation side to the unknown side to achieve the purpose of orientation.

[0049] For the laser centering base 2, set and fix the laser centering base 2 on the welding brackets 4S and 4X at the top of the trolley. The fixed laser centering base 2 does not need to be disassembled with the total station. One is to facilitate the setup of the total station, and the other is that the laser centering base can provide a vertical laser beam for transferring the upper and lower coordinate points of the trolley. Measuring the coordinate of the laser point projected by the laser centering base onto the lower laser target board is equivalent to measuring the coordinate of the laser centering base, so as to achieve the purpose of up and down coordinate transfer.

[0050] For the central screw 5, the function of the central screw 5 is to fix the laser centering base 2 on the welding brackets 4S and 4X. The central screw is hollow, and the laser of the laser centering base 2 can pass through.

[0051] For the welding brackets 4S and 4X, they are welded and fixed at the top and bottom plane positions of the trolley, used to fix the laser centering base 2 and the total station for wire point transfer.

[0052] Removable forced centering tripods A10 and B11 are used for point coordinate transfer at the middle passage under the trolley. Compared with ordinary wooden tripods, they are convenient to set up, do not require point alignment, can be arbitrarily set up during the wire transfer process, and can be removed at any time after the point coordinate transfer is completed, without affecting the passage of construction vehicles.

[0053] Target prisms A9 and reflector 6 are used as observation targets during total station measurement and are used in conjunction with the total station. Reflector 6 can be used for measuring the target coordinates of the laser points projected on the laser target board 7, and is flexible and simple to use.

[0054] The method of the first embodiment of the present invention (projecting vertical laser from top to bottom) for wire transfer in the narrow space of a small-diameter sharp-curve shield tunnel adopts a wire transfer device for the narrow space of a small-diameter sharp-curve shield tunnel, such as Figure 1 shown, including total stations 1S and 1X, laser centering base 2, welding bracket reserved bolt holes 3, welding brackets 4S and 4X, center screw 5, reflector 6, laser target board 7, fixed target board screws 8, target prism A9, removable forced centering tripods A, B10, 11.

[0055] Figure 2 The laser centering base 2 is installed on the welding bracket 4S, the center screw 5 passes through the welding bracket reserved bolt hole 3 to fix the laser centering base 2, and then the laser centering base 2 is leveled and the vertically emitted laser of the laser centering base 2 is turned on.

[0056] Figure 3 The laser target board 7 is aligned with the vertical laser emitted by the upper laser centering base 2, and then the laser target board 7 is fixed on the welding bracket 4X with the fixed target board screws 8. The reflector 6 is placed on the laser point projected by the laser centering base 2 on the laser target board 7. The total station 1X is set up on the removable forced centering tripod A10, and the target prism A9 is set up on the removable forced centering tripod B11. The total station 1X is set up on the removable forced centering tripod A10 to complete orientation, and the reflector 6 on the laser target board 7 is measured. The laser target board 6 is perpendicular to the laser of the laser centering base 2. Measuring the coordinates of the reflector 6 is equivalent to measuring the upper laser centering base 2. At this time, the upward coordinate transfer measurement is completed.

[0057] As Figure 4 shown, the method specifically includes the following steps:

[0058] Step 1, as Figure 2 shown, first weld brackets 4S and 4X at the corresponding upper and lower positions of two positions of the trolley, reserve bolt holes 3 that can pass through the center screw, fix the laser centering base 2 on the upper welding bracket 4S of the trolley with the center screw 5, and level the laser centering base 2.

[0059] Step 2: Turn on the vertical laser of the vertical laser alignment base 2. The vertical laser beam passes through the central screw 5 and projects vertically downward from the upper part onto the laser target plate 7, and mark the position where the laser beam of the vertical laser alignment base projects onto the laser target plate 7.

[0060] Step 3: As Figure 3 shown, use the total station 1X to transfer the coordinate of the traverse survey point to the movable forced centering tripods A10 and B11 near the laser target plate 7 as the traverse point reference turning points. Taking the movable forced centering tripods A10 and B11 as the reference points, the position where the vertical laser of the vertical laser alignment base 2 projects onto the laser target plate 7 can be directly observed.

[0061] Step 4: Stand the reflector 6 at the marked position on the laser target plate 7. The total station 1X sets the orientation target prism A9 to complete the orientation, and then the coordinate of the laser target plate 7 can be observed. Since the laser beam is vertical, observing the coordinate of the laser target plate 7 is the coordinate of the top vertical laser alignment base 2. By setting up the body of the total station at the measurement position of the vertical laser alignment base 2, the coordinate of this point can be directly applied to complete the measurement work.

[0062] As Figures 5 to 8 shown, the wire transfer device for the narrow space of the small-diameter sharp-curve shield tunnel in the second embodiment of the present invention (projecting vertical laser from bottom to top) includes total stations 1S and 1X, welding brackets 4S and 4X, central screw 5, reflector 6, laser target plate 7, fixed target plate screw 8, target prisms A9, B12, movable forced centering tripods A10, B11, laser vertical point projector 13, and forced centering plate 14.

[0063] The forced centering plate 14 is fixed on the welding brackets 4S and 4X and is used to set up the laser vertical point projector 13 and the target prism. The vertical laser beam of the laser vertical point projector 13 can project vertical laser from the lower bracket onto the laser target plate 7, and mark the position where the laser beam of the laser vertical point projector 13 projects onto the laser target plate 7. When the total station transfers the coordinate of the traverse survey point to the vicinity of the lower welding bracket, at this time, the total station is set up on the movable forced centering tripod, and the position on the welding bracket can be directly observed. Set the prism on the forced centering plate 14, and the total station observes the coordinate of the prism. After the coordinate of the prism is observed, then set up the laser vertical point projector 13 at this position. Since the laser beam is vertical, the observed coordinate of the prism is the coordinate of the laser vertical point projector 13 projecting the laser beam upward. Place the laser target plate 7 on the top of the trolley and mark the position, and then use the total station to transfer the coordinate on the laser target plate to the required position to complete the measurement work.

[0064] Total station 1S and 1X. Set up the total station instrument at a known point. According to the coordinates of the measuring station and the orientation point, or the orientation distance and azimuth angle, observe any target point to obtain the three-dimensional coordinate values of the target point, and transfer the distance information and azimuth information from the known orientation side to the unknown side to achieve the purpose of orientation.

[0065] Laser vertical point projector 13. Weld a bracket at the lower part of the trolley, and fix the forced centering plate 14 on the bracket. One is to provide a target for the total station by setting up the prism, and the other is to set up the laser vertical point projector to provide a vertical laser beam for the transfer of the upper and lower coordinate points of the trolley. The laser point projected by the laser vertical point projector 13 onto the upper laser target plate 7 is equivalent to directly projecting the point position coordinates of the forced centering plate 14 at the lower part of the trolley onto the laser target plate 7, so as to achieve the purpose of vertical transfer of coordinates.

[0066] Forced centering plate 14. The function of the forced centering plate 14 is to directly set up the instrument on the point and level it. After the point measurement is completed, it is used as a reference point.

[0067] Welding brackets 4S and 4X are welded and fixed at the top and bottom plane positions of the trolley to fix the laser centering base and the total station for the transfer of traverse point positions.

[0068] Removable forced centering tripod is used for the transfer of point position coordinates at the middle passage under the trolley. Compared with ordinary wooden tripods, it is convenient to set up, does not require point alignment, can be set up arbitrarily during the transfer of the traverse, and can be removed at any time after the transfer of point position coordinates is completed without affecting the passage of construction vehicles.

[0069] Target prisms and reflectors are used as observation targets during the measurement of the total station and are used in conjunction with the total station. The reflector can be used for the measurement of the target coordinates of the laser point projected on the laser target plate, and is flexible and convenient to use.

[0070] The application of the second embodiment of the present invention (projecting vertical laser from bottom to top) to the method for transferring traverse in the narrow space of a small-diameter sharp-curve shield tunnel adopts the device for transferring traverse in the narrow space of a small-diameter sharp-curve shield tunnel, as Figure 5 shown, which includes total stations 1S and 1X, welding brackets 4S and 4X, center screws 5, reflectors 6, laser target plates 7, fixed target plate screws 8, target prisms A9, B12, removable forced centering tripods A10, B11, laser vertical point projectors 13, and forced centering plates 14.

[0071] Figure 6 The target prism B12 is installed on the lower welding bracket 4X, and the center screw 5 fixes the forced centering plate 14 on the welding bracket 4X to install and fix the target prism B12 and level it.

[0072] Figure 7After the total station 1X completes the orientation by measuring the rear target prism A9, collect the coordinate values of the target prism B12 installed on the lower welding bracket 4X. After completing the collection of the coordinate points of the forced centering plate 12 on the lower welding bracket 4X, remove the target prism B12, set up the laser vertical plummet 13 at this point, and project the coordinate of this point vertically upward according to the instrument characteristics of the laser vertical plummet 13.

[0073] Figure 8 Set up the laser vertical plummet 13 and project the vertical laser on the laser target plate 7. Then fix the laser target plate 7 on the welding bracket 4 with the fixed target plate screw 8. Stand the reflector 6 on the laser point projected by the laser vertical plummet 13 on the laser target plate 7. Set up the total station 1S at the measurement suspension point at a high position of the trolley, and measure the reflector 6 on the laser target plate 7 to complete the point position collection and traverse measurement. At this time, the coordinate upward transfer measurement is completed.

[0074] As Figure 9 shown, the method specifically includes the following steps:

[0075] Step 1, as Figure 6 shown, first weld the brackets 4S and 4X at the corresponding upper and lower positions of two positions of the trolley. Install and fix the forced centering plate 3 on the upper surface of the lower welding bracket 4X with the center screw 5. Install and level the target prism B12 on the forced centering plate 14 of the lower welding bracket 4X.

[0076] Step 2, as Figure 7 shown, use the total station 1X to transfer the coordinate of the traverse measurement point to the movable forced centering tripods A10 and B11 near the target prism B12 as the transfer points of the traverse reference points. Taking the movable forced centering tripods A10 and B11 as the reference points, the point position of the lower target prism B12 can be directly observed.

[0077] Step 3, set up the target prism B12 on the forced centering plate 14, and the total station 1X observes the coordinate of the target prism B12. After the coordinate observation of the target prism B12 is completed, then set up the laser vertical plummet 13.

[0078] Step 4, as Figure 8As shown in the figure, the vertical laser beam of the laser vertical point projector 13 can project a vertical laser onto the laser target board 7 of the upper welding support 4S. Mark the position where the laser beam of the laser vertical point projector 13 is projected onto the laser target board 7 and fix the laser target board 7 with the fixed target board screw 8. The laser vertical point projector 13 can provide a vertical laser beam. Then, place the reflector 6 at the marked position on the upper laser target board 7. Since the laser beam is vertical, observing the point position coordinates of the lower target prism B12 is the point position coordinates of the marked point on the top laser target board 7. The total station 1S is set up at the measurement suspension point at a high position on the trolley, and the reflector 6 placed on the laser target board 7 is measured, then the point position collection and transfer can be completed. At this time, the coordinate upward transfer measurement is completed, and the point position coordinates are measured with the total station to complete the measurement work.

[0079] Two schemes are used for the up and down coordinate point position transfer of the trolley, and the laser centering base and the laser vertical point projector are used to complete the up and down transfer of the measurement coordinates.

[0080] The point position transfer is direct and fast, avoiding the tediousness of the wire-by-wire transfer in the narrow space at the top of the trolley. Using this method reduces the number of measuring stations and greatly saves time.

[0081] The above-described embodiments are only descriptions of the preferred embodiments of the present invention, and do not limit the scope of the present invention. Without departing from the design spirit of the present invention, various deformations and improvements made by those of ordinary skill in the art to the technical solutions of the present invention all fall within the protection scope determined by the claims of the present invention.

Claims

1. A conductor transmission device for a narrow space in a small-diameter, sharp-curve shield tunnel, characterized in that: include: Total station, laser centering base, reserved bolt holes for welding bracket, welding bracket, center screw, reflector, laser target, fixed target screw, target prism, movable forced centering tripod, laser vertical projection instrument, forced centering plate; The laser centering base is fixed to the welding bracket on the top of the trolley by a central screw, and its vertical laser beam passes through the central screw and is projected to the laser target plate below, and coordinate transmission is achieved by projecting the vertical laser from top to bottom; The laser vertical projector and the target prism are fixed on the welding bracket through a forced centering plate. The vertical laser beam of the laser vertical projector projects the vertical laser from the lower welding bracket to the laser target plate, and coordinate transfer is achieved by projecting the vertical laser from bottom to top.

2. The narrow space conductor transmission device for a small-diameter sharp-curve shield tunnel according to claim 1 is characterized in that: The center screw is a hollow rod, which is used to fix the laser centering base on the welding bracket and level the laser centering base; the welding bracket is welded and fixed on the top and lower plane positions of the trolley, and is used to fix the laser centering base and the total station for wire point transmission.

3. The narrow space conductor transmission device for a small diameter sharp curve shield tunnel according to claim 1 is characterized in that: The total station is set up at a known point, and any target point is observed according to the coordinates of the measuring station and the orientation point or the orientation distance and azimuth, to obtain the three-dimensional coordinate value of the target point, and the distance information and azimuth information are transmitted from the known orientation side to the unknown side to achieve the purpose of orientation.

4. The narrow space conductor transmission device for a small-diameter sharp-curve shield tunnel according to claim 1 is characterized in that: The movable forced centering tripod is used for transmitting the point coordinates at the middle channel below the trolley. The station can be set up at will during the wire transmission process. After the point coordinates are transmitted, it can be removed at any time without affecting the passage of construction vehicles.

5. The narrow space conductor transmission device for a small-diameter sharp-curve shield tunnel according to claim 1 is characterized in that: The target prism and reflector are used for observing targets during total station measurement and are used in conjunction with the total station. The reflector is used for measuring the coordinates of the laser point target projected on the laser target board.

6. The narrow space conductor transmission device for a small diameter sharp curve shield tunnel according to claim 1 is characterized in that: The laser centering base is fixed on the welding bracket on the top of the trolley and is not disassembled with the total station. Firstly, it is to facilitate the installation of the total station. Secondly, the laser centering base provides a vertical laser beam for transmitting the upper and lower coordinate points of the trolley and measuring the coordinates of the laser point projected by the laser centering base onto the laser target plate below, so as to achieve the purpose of transmitting the coordinates up and down.

7. The narrow space conductor transmission device of a small diameter sharp curve shield tunnel according to claim 1 is characterized in that: The laser vertical projector is fixed on the welding bracket at the bottom of the trolley and forced to return to the center disk. The purpose is to provide a target for the total station when setting up the prism, and to provide a vertical laser beam for the upper and lower coordinate point transmission of the trolley. The laser vertical projector projects a laser point on the laser target board above, so as to achieve the purpose of transferring the coordinates up and down.

8. The narrow space conductor transmission device for a small-diameter sharp-curve shield tunnel according to claim 1 is characterized in that: The forced return to the center is to set up the total station directly on the point and level it, and use it as a reference point after the point measurement is completed.

9. A method for applying a conductor transmission device in a narrow space of a small-diameter sharp-curve shield tunnel, characterized in that: The method of projecting vertical laser from top to bottom is adopted. The specific steps are as follows: Step 1: Weld the brackets at the corresponding positions of the upper and lower parts of the two positions of the trolley, fix the laser centering base on the upper welding bracket of the trolley with the center screw, and level the laser centering base; Step 2: The vertical laser beam of the laser centering base passes through the center screw and projects the vertical laser from the top to the laser target, and marks the point where the laser beam of the laser centering base is projected on the laser target; Step 3: Use the total station to transfer the coordinates of the wire measurement point to the vicinity of the laser target, use the movable forced centering tripod as the wire point turning point, and use the movable forced centering tripod as the reference point to directly observe the point vertically projected from the laser centering base to the laser target; Step 4. Place the reflector at the position marked on the laser target, and use the total station to observe the coordinates of the laser target point. Because the laser beam is vertical, the observed coordinates of the laser target point are the coordinates of the top laser centering base. Use the total station body to set up the measuring point on the laser centering base, so that the total station and the laser centering base are combined into a whole. Then, you can directly apply the coordinates of this point and complete the measurement work.

10. A method for applying a conductor transmission device in a narrow space of a small-diameter sharp-curve shield tunnel, characterized in that: The method of projecting vertical laser from bottom to top is adopted. The specific steps are as follows: Step 1: fix the forced centering disc component on the lower welding bracket for setting up the laser vertical projector and prism; Step 2: Use the total station to transfer the coordinates of the wire measurement point to the vicinity of the lower welding bracket, use the movable forced centering tripod as the wire point turning point, and use the movable forced centering tripod as the reference point to directly observe the prism set up on the forced centering plate; Step 3: Set up a prism on the forced centering plate, and use a total station to observe the prism point coordinates. After the prism coordinate observation is completed, set up a laser vertical projection instrument; Step 4. The vertical laser beam of the laser vertical projector can project a vertical laser onto the laser target of the upper welding bracket to mark the point where the laser beam of the laser vertical projector is projected on the laser target. The laser vertical projector can provide a vertical laser beam for transferring the upper and lower coordinate points of the trolley. The laser point projected by the laser vertical projector onto the upper laser target is equivalent to directly projecting the coordinates of the forced centering point of the lower part of the trolley onto the laser target, completing the upper and lower transfer of the measured coordinates.

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