CN116817744A

CN116817744A - Bridge swivel space track monitoring system and monitoring method

Info

Publication number: CN116817744A
Application number: CN202310532269.3A
Authority: CN
Inventors: 王翔; 余高银; 王永太; 周子楠; 陈仕猛; 袁攀峰; 吴凡; 王正一; 唐晨霖; 王勇
Original assignee: China Railway 11th Bureau Group Co Ltd; Fourth Engineering Co Ltd of China Railway 11th Bureau Group Co Ltd
Current assignee: China Railway 11th Bureau Group Co Ltd; Fourth Engineering Co Ltd of China Railway 11th Bureau Group Co Ltd
Priority date: 2023-05-09
Filing date: 2023-05-09
Publication date: 2023-09-29

Abstract

The bridge turning space track monitoring system comprises a laser vertical projection and horizontal monitoring device, a turning process monitoring device and two sets of turning positioning devices, wherein the laser vertical projection and horizontal monitoring device is arranged at the end of a bridge; the laser vertical projection and horizontal monitoring device is used for monitoring the horizontal movement track line of the bridge; the swivel process monitoring device is used for monitoring deviation values between the bridge swivel process and the theoretical swivel; and the swivel positioning device is used for observing the transverse and longitudinal deviation values of the actual track laser point and the theoretical track laser point of the bridge at the starting point position and the ending point position. The design is convenient and stable to monitor and has a good monitoring effect.

Description

Bridge swivel space track monitoring system and monitoring method

Technical Field

The invention relates to the technical field of bridge swivel construction monitoring, in particular to a bridge swivel space track monitoring system and a bridge swivel space track monitoring method.

Background

In order to ensure smooth positioning of the beam body, the swivel bridge needs to monitor the posture of the beam body by continuously measuring a large number of monitoring points, so that the monitoring work is very heavy and a large number of complex calculation programs are needed, and although some monitoring work introduces automatic monitoring, once equipment faults such as monitoring instruments, computer equipment, program software, communication interfaces and the like or calculation errors lead to the fact that the swivel work can be continued after troubleshooting such as suspension and the like, the cantilever beam is caused to stay for a long waiting time, and the stability of the beam body and the effective swivel time of the beam body are not facilitated to be delayed.

Disclosure of Invention

The invention aims to overcome the defects and problems of complex monitoring work and unstable monitoring of a bridge swivel in the prior art, and provides a bridge swivel space track monitoring system and a bridge swivel space track monitoring method with convenient and stable monitoring.

In order to achieve the above object, the technical solution of the present invention is:

the bridge turning space track monitoring system comprises a laser vertical projection and horizontal monitoring device, a turning process monitoring device and two sets of turning positioning devices, wherein the laser vertical projection and horizontal monitoring device is arranged at the end of a bridge, the turning process monitoring device and the turning positioning devices are all arranged on the ground, the turning process monitoring device is positioned on a ground theoretical projection track line formed by the laser vertical projection and horizontal monitoring device vertically downwards in the bridge theoretical turning process, and the two sets of turning positioning devices are respectively positioned at the starting point position and the end point position of the ground theoretical projection track line;

The laser vertical projection and horizontal monitoring device is used for emitting laser vertically downwards at the end head of the bridge to perform vertical projection of the outline of the bridge to obtain an actual track laser point, and automatically measuring the actual vertical distance from the end head of the bridge to the ground to perform horizontal movement track line monitoring of the bridge while performing vertical projection;

the swivel process monitoring device is used for monitoring the deviation value of an actual track laser point of the laser vertical projection and horizontal monitoring device and a ground theoretical projection track line of the bridge in the swivel process of the bridge and measuring the deviation value of the actual vertical distance from the ground to the theoretical vertical distance of the laser vertical projection and horizontal monitoring device arranged at the end of the bridge;

the swivel positioning device is used for observing transverse and longitudinal deviation values generated under the action of external force or internal force in the process of standing and waiting for swivel at the starting point position of the ground theoretical projection trajectory line of the bridge, and observing transverse and longitudinal deviation values of an actual trajectory laser point and a theoretical trajectory laser point of the laser vertical projection and horizontal monitoring device at the end point position of the ground theoretical projection trajectory line after the bridge is actually swiveled in place.

The laser vertical projection and horizontal monitoring device comprises four automatic leveling bases and four mounting frames, wherein the four automatic leveling bases are respectively connected to the upper sides of the four mounting frames, the four mounting frames are respectively arranged at four top angles of a bridge, the automatic leveling bases comprise top plates and bottom plates which are arranged at intervals up and down, the upper sides of the bottom plates are provided with leveling devices for leveling the top plates, the leveling devices are connected with the top plates, the lower sides of the bottom plates are provided with connecting holes, the lower sides of the mounting frames are provided with oval holes, hollow bolts are arranged in the oval holes, the bottoms of the hollow bolts penetrate through the oval holes and are in threaded connection with the connecting holes, the outer sides of the hollow bolts are in contact with the light surfaces of the inner sides of the oval holes, the upper sides of the top plates are provided with through holes, mounting shafts are arranged in the through holes, and laser ranging modules are arranged in the mounting shafts, and the output ends of the laser ranging modules are arranged relative to the central axes of the hollow bolts;

The laser ranging module is used for emitting indication laser vertically downwards and measuring the distance from the automatic leveling base to the ground.

The leveling device comprises round horizontal bubbles, a power supply, rod end joint bearings, two supporting rods and two groups of driving components, wherein the top plate and the bottom plate are of regular triangle structures, the round horizontal bubbles, the power supply and the two groups of driving components are all arranged on the upper side of the bottom plate, the lower ends of the rod end joint bearings are connected to one vertex of the bottom plate, the upper ends of the rod end joint bearings are hinged to one vertex of the top plate, the two supporting rods are symmetrically arranged on the other two vertices of the bottom plate along the central axis of the bottom plate, the upper ends of the two supporting rods are respectively connected with the other two vertices of the top plate in a threaded mode, the two groups of driving components are connected with the power supply and respectively control the two supporting rods to rotate, the upper side of the top plate is provided with a display component, and the lower side of the top plate is provided with a control component, and the power supply, the driving components and the display component are connected with the control component.

The laser vertical projection and horizontal monitoring device further comprises a first motor, a pinion, a large gear, a prism frame, a second motor, a driving gear, a driven gear and a prism head, wherein the first motor is connected with the control assembly, the first motor is connected to the lower side of the top plate, the pinion is connected to the output end of the first motor, the large gear is located in the through hole and is meshed with the pinion, the large gear is sleeved on the outer peripheral surface of the lower end of the installation shaft, the prism frame is connected to the upper end of the installation shaft, the second motor is connected with the control assembly, the second motor is connected to the outer side of the prism frame, the output end of the second motor penetrates through the prism frame and then is located on the inner side of the prism frame, the driving gear is connected to the output end of the second motor, the driven gear is meshed with the driving gear, the prism head is connected to the prism frame in a rotating mode through a transverse shaft, and the driven gear is sleeved on the transverse shaft.

The rotating process monitoring device comprises a plurality of conical tables, the conical tables are arranged on the ground along a ground theoretical projection trajectory line, the upper end faces of the conical tables are horizontally arranged, reflection patches with cross-shaped stars are arranged on the upper end faces of the conical tables, the centers of the cross-shaped stars on the reflection patches are located on the ground theoretical projection trajectory line, the auxiliary cross-shaped scale lines coincide with the perpendicular bisectors of the ground theoretical projection trajectory line, and the reflection patches are used for carrying out position indication and reflected laser ranging on the laser emitted by the laser perpendicular projection and horizontal monitoring device.

The rotating positioning device comprises a stainless steel target and a supporting frame, wherein the supporting frame is located on the ground, the stainless steel target is connected to the upper side of the supporting frame, cross coordinate scales are arranged at the center of the upper end face of the stainless steel target, a plurality of arc holes are formed in the upper end face of the stainless steel target, the arc holes are circumferentially distributed relative to the cross coordinate scale center points on the stainless steel target, threaded columns are arranged in the arc holes, the lower ends of the threaded columns are connected to the upper side of the supporting frame, two nuts are connected to the outer peripheral surface of the threaded columns in a threaded mode, the two nuts are located on the upper side and the lower side of the stainless steel target respectively, a plurality of equidistant auxiliary scale rings or square grids are arranged at the center of the stainless steel target, and horizontal bubbles and compass are arranged on the upper side of the stainless steel target.

A method for monitoring a space trajectory of a bridge swivel, the monitoring method comprising the steps of:

s1, installing a laser vertical projection and horizontal monitoring device at the end of a bridge, enabling the laser vertical projection and horizontal monitoring device to vertically emit laser downwards, installing a group of swivel positioning devices at laser points on the ground, setting the points as starting point positions of theoretical projection track lines of the ground, and enabling the centers of the swivel positioning devices to be aligned with the centers of the laser points;

s2, marking a ground theoretical projection track line of the bridge on a flat ground by using instrument equipment by taking the horizontal distance from a laser emission point of the laser vertical projection and horizontal monitoring device to the rotation center of the bridge as a radius, setting a plurality of continuous intermediate points on the ground theoretical projection track line, and installing a rotating body process monitoring device at the intermediate points;

s3, arranging a group of swivel positioning devices at the end position of the ground theoretical projection track line, wherein the center of each swivel positioning device coincides with the laser emission point of the laser vertical projection and horizontal monitoring device after the theoretical swivel of the bridge is positioned;

s4, starting turning the bridge, observing whether a laser point emitted by the laser vertical projection and horizontal monitoring device on the ground coincides with a central point of the turning process monitoring device on a ground theoretical projection track line, and comparing the laser point with a theoretical vertical distance after ranging downwards, and if the spatial position coincides with a theoretical value, normally turning the bridge; if the space position deviation is large, adopting corresponding measures to treat the bridge and continuing to swivel;

S5, after the bridge is actually turned in place, observing whether a laser point emitted by the laser vertical projection and horizontal monitoring device on the ground coincides with a center point of the turning positioning device at the end position, if not, finely adjusting the posture of the bridge by utilizing a hydraulic jack to enable the bridge to reach the theoretical in-place position by observing longitudinal and transverse deviation values of an actual track laser point of the laser vertical projection and horizontal monitoring device and a theoretical track laser point and deviation values of an actual vertical distance and a theoretical vertical distance of the bridge, and pouring concrete between an upper bearing platform and a lower bearing platform for anchoring.

In the steps S1 and S4, the four hollow bolts are loosened to enable the four automatic leveling bases to horizontally move along the oval holes relative to the rotation center of the bridge, the rotation radiuses of the four automatic leveling bases are the same and share one ground theoretical projection trajectory line, then the four hollow bolts are screwed down, the four automatic leveling bases are fixed, meanwhile, the laser ranging module emits laser downwards and measures the actual vertical distance between the bridge end head and the ground, in the bridge turning process, the four laser points on the ground are compared with the ground theoretical projection trajectory line, meanwhile, the four actual vertical distances are respectively compared with the theoretical vertical distance calculated after the previous measurement, when the laser points deviate from the ground theoretical projection trajectory line or the actual vertical distance deviates, the bridge is illustrated to deflect in the turning process, and when the deflection value exceeds an allowable value, corresponding measures are taken to treat the bridge to continue turning.

In the step S4, when the bridge rotates, the laser points projected by the laser vertical projection and horizontal monitoring device are observed on the reflective patches, when the laser points deviate from the center of the auxiliary line of the cross scale, the actual movement track of the bridge deviates from the theoretical movement track, the deviation value of the bridge on the middle point is read out through the auxiliary line of the cross scale, the vertical distance on the middle point is measured, the initial elevation of the laser vertical projection and horizontal monitoring device is used as the subtracted number, the elevations of the reflective patches on the ground are respectively used as the subtracted number, the difference between the reflective patches is calculated as the actual vertical distance, then the actual vertical distance is compared with the theoretical vertical distance to obtain the deviation value of the vertical direction and the plane position of the bridge, the space monitoring of the bridge projection track and the horizontal movement track is performed, and when the allowable value is exceeded, the bridge normal rotation is realized after corresponding measures are taken.

In the steps S1, S3 and S5, before a bridge rotates, an initial point of a ground theoretical projection track line is firstly discharged by an instrument on the ground, then a supporting frame is pre-buried at a corresponding initial position of the initial point, the supporting frame moves to enable the center of a cross coordinate scale on a stainless steel plate target to be aligned with a laser point of a laser vertical projection and horizontal monitoring device, a compass is observed, the stainless steel plate target is horizontally rotated according to the angle of the compass, an arc hole rotates around a fixed threaded column, the cross coordinate axis of the stainless steel plate target is parallel to the longitudinal axis of the bridge, then nuts on each threaded column are rotated, and when horizontal bubbles are observed, the leveling of the stainless steel plate target is completed. Then the ending point of the theoretical projection track line of the ground is discharged by an instrument on the ground, then another supporting frame is placed at the ending point position corresponding to the ending point, the other supporting frame is moved, one axis of the cross scale on the other stainless steel plate target coincides with the perpendicular bisector of the ending point, and the other stainless steel plate target is leveled according to the steps;

When the bridge swivel is in place, observing whether a laser point emitted to the ground by the laser vertical projection and horizontal monitoring device coincides with the center point of another stainless steel plate target, if not, reading out the transverse and longitudinal error values of an actual track laser point and a theoretical track laser point of the bridge in place at the end position of a theoretical projection track line of the ground by the laser vertical projection and horizontal monitoring device when the bridge is in place on an auxiliary scale ring or grid net of a cross coordinate scale, and finely adjusting the posture of the bridge to the theoretical in-place position by a hydraulic jack.

Compared with the prior art, the invention has the beneficial effects that:

1. according to the bridge swivel space trajectory monitoring system and the bridge swivel space trajectory monitoring method, a ground theoretical projection trajectory line of a bridge is marked on the ground in advance, vertical laser emitted by a laser vertical projection and horizontal monitoring device is utilized to vertically project the motion state of the bridge, the vertical projection trajectory line is conveniently compared with the ground theoretical projection trajectory line marked on the ground, the beam body motion trajectory line is subjected to projection monitoring in the vertical direction, the laser vertical projection and horizontal monitoring device is utilized to measure the actual height difference between the bridge end and the ground during projection, the horizontal motion trajectory of the bridge is monitored by utilizing a numerical value through comparison with a theoretical value, the change of the bridge position caused by factors such as temperature and stress can be reflected by the scale of a cross scale auxiliary line in the swivel positioning device at the starting point position of the ground theoretical projection trajectory line, the deviation value of the actual rotation trajectory line of the bridge is monitored at the end point position of the ground theoretical projection trajectory line of the bridge through the swivel positioning device, the normal in-position means of the bridge is assisted, the bridge space monitoring in the vertical direction and the horizontal direction is realized, compared with the prior art, the bridge can be simply and efficiently realized without complex numerical value automatic calculation, and the bridge movement trajectory line can be continuously controlled to be prevented from running along the bridge in-position when the bridge is in-position, and the bridge fault monitoring equipment can be continuously controlled at the same time when the bridge is in-scheduled to be in-position. Therefore, the monitoring method is simple, efficient and scientific.

2. According to the bridge swivel space track monitoring system and the bridge swivel space track monitoring method, the automatic leveling bases are respectively arranged at the four corners of the bridge end, the laser ranging module arranged at the center of each automatic leveling base is used for emitting vertical laser downwards to indicate the bridge movement track and measuring the vertical distance between each automatic leveling base and the ground, the oval holes are formed, so that the automatic leveling bases can move horizontally and horizontally in the oval holes transversely and leftwards, the rotating radiuses of the plurality of automatic leveling bases are the same, one ground theoretical projection track line is shared, the hollow bolts are screwed after adjustment, in the bridge swivel process, the control assembly controls the driving assembly to enable the two supporting rods to rotate to drive the top plate to lift for automatic leveling, and as the other supporting point adopts the rod end joint bearing to be equivalent to the plane height of the fixed automatic leveling base, the height of each automatic leveling base is not changed after long-time automatic leveling, the laser module on each automatic leveling base is always in a vertical state, the laser can automatically vertically transmit the hollow bolt from the center to the ground for bridge projection, and meanwhile, the measured vertical distance of each laser ranging module cannot change due to the change errors. Therefore, the invention has stable monitoring process and higher monitoring precision.

3. According to the bridge swivel space track monitoring system and the bridge swivel space track monitoring method, the prism frame and the prism head are arranged, the prism frame can rotate in the horizontal direction through the first motor, the prism head can rotate in the vertical direction through the second motor, the total station is matched with the prism head, a full-automatic monitoring mode is adopted, the prism on the automatic leveling base is continuously tracked and measured to realize double monitoring, equipment faults are avoided, the monitoring of all-around and multiple coverage of a bridge is realized, and the monitoring data in the bridge swivel process is more accurate. Therefore, the invention has stable monitoring process and higher monitoring precision.

4. According to the bridge swivel space track monitoring system and the bridge swivel space track monitoring method, a point on a ground theoretical projection track line is discharged by an instrument, a continuous or intermittent projection track line can be arranged on a flat ground, a plurality of conical tables are arranged on an uneven ground, reflection patches are horizontally arranged on the top surfaces of the conical tables so as to facilitate reflection of ranging laser, a reflection patch cross-shaped star is positioned on the projection track line, a shaft coincides with a perpendicular bisector of the track line, at the moment, the deviation value of a bridge on the middle point can be directly read out by sleeving a cross-shaped scale auxiliary line, the bridge can be conveniently stood and waited for a swivel process, scales of the cross-shaped scale auxiliary line reflect bridge position changes caused by factors such as temperature and stress, and measures can be timely taken to process when the deviation value of an actual rotating track of the bridge exceeds a range so as to avoid accidents. Therefore, the invention has the advantages of convenient monitoring and good monitoring effect.

5. According to the bridge swivel space track monitoring system and the bridge swivel space track monitoring method, the stainless steel plate target is connected with the support frame through the connection mode of the threaded columns and the nuts, meanwhile, the stainless steel plate target is vertically limited through the connection mode of the two nuts, one nut is screwed on each threaded column, then the stainless steel plate target is sleeved in the threaded column, the nut below the threaded column is rotated under the indication of horizontal bubbles to level the stainless steel plate target, the stainless steel plate target is provided with an arc hole and is concentric with the center of a cross coordinate scale, so that the horizontal rotation fine adjustment of the stainless steel plate target enables the coordinate longitudinal axis to be parallel to the bridge longitudinal axis so as to be convenient for direct reading, the compass is arranged on the stainless steel plate target, the cross coordinate axis of the stainless steel plate target is parallel to the bridge axis according to the angle of the compass, the stainless steel plate target is clamped and limited through one nut on the threaded column after the leveling of the stainless steel plate target and the axis are completed, and an auxiliary scale ring or a square grid is arranged on the cross coordinate axis, the bridge body is rotated in place, and can not be completely aligned due to various reasons, and therefore the cross scale ring or the square grid body is completely aligned with the bridge body is completely, and the error is combined with the position of the bridge body in the position when the bridge body is in place, and the error is in the position, and the position is in the position accurate position is directly accurate, and the position is in the position and the position is ensured, and the error is in the position and the position error is directly and the position accurate position when the bridge is in the position accurate position. Therefore, the invention has the advantages of convenient monitoring and higher monitoring precision.

Drawings

Fig. 1 is a schematic structural diagram of a bridge swivel space trajectory monitoring system according to the present invention.

Fig. 2 is a rotational plan view of the bridge according to the present invention.

Fig. 3 is an enlarged view at a in fig. 1.

Fig. 4 is an enlarged view at B in fig. 1.

Fig. 5 is a schematic view of the structure of the laser vertical projection and horizontal monitoring device in the present invention.

Fig. 6 is a schematic view of the structure of the shaft-mounted, self-leveling base of the present invention.

Fig. 7 is a schematic bottom view of the top plate of the present invention.

Fig. 8 is a schematic top view of a top plate of the present invention.

Fig. 9 is a schematic view of the structure of the driving assembly in the present invention.

Fig. 10 is a schematic view of the structure of a prism holder and a prism lens according to the present invention.

Fig. 11 is a schematic structural view of a second motor, a driving gear and a driven gear in the present invention.

Fig. 12 is a schematic view of the structure of the mounting frame of the present invention.

FIG. 13 is a schematic diagram of a rotor process monitoring device according to the present invention.

Fig. 14 is a schematic structural view of a rotor positioning device according to the present invention.

Fig. 15 is a schematic structural view of a stainless steel target according to the present invention.

FIG. 16 is a schematic structural view of a stainless steel target in example 5

In the figure: bridge 1, laser vertical projection and level monitoring device 2, auto leveling base 21, mounting bracket 22, mounting shaft 23, control assembly 24, multi-axis sensor 25, drive assembly 26, display assembly 27, laser ranging module 28, power supply 29, first motor 210, pinion 211, bull gear 212, second motor 213, drive gear 214, driven gear 215, motor drive 216, third motor 217, gear drive 218, prism mount 219, prism head 220, laser head 221, cross shaft 222, buzzer 223, floor 224, roof 225, through-hole 226, connecting hole 227, rod end joint bearing 228, support bar 229, adjustment nut 230, round horizontal bubble 231, display 232, mechanical compass 233, angle 234, connecting steel plate 235, work steel plate 236, oval hole 237, hollow bolt 238, swivel process monitoring device 3, cone table 31, reflective patch 32, swivel positioning device 4, stainless steel target 41, support frame 42, cross scale 43, arc hole 44, threaded post 45, 46, auxiliary scale 47, square grid 48, ground theory 5, horizontal track 7, north track 8, north track 9, etc.

Detailed Description

The invention is described in further detail below with reference to the accompanying drawings and detailed description.

Referring to fig. 1 to 16, a bridge swivel space track monitoring system comprises a laser vertical projection and horizontal monitoring device 2, a swivel process monitoring device 3 and two sets of swivel positioning devices 4, wherein the laser vertical projection and horizontal monitoring device 2 is arranged at the end of a bridge 1, the swivel process monitoring device 3 and the swivel positioning devices 4 are all arranged on the ground, the swivel process monitoring device 3 is positioned on a ground theoretical projection track 5 formed by the laser vertical projection and horizontal monitoring device 2 vertically downwards in the theoretical swivel process of the bridge 1, and the two sets of swivel positioning devices 4 are respectively positioned at the starting point position and the end point position of the ground theoretical projection track 5;

the laser vertical projection and horizontal monitoring device 2 is used for emitting laser vertically downwards at the end of the bridge 1 to perform vertical projection of the outer contour of the bridge 1 to obtain an actual track laser point, and automatically measuring the actual vertical distance from the end of the bridge 1 to the ground while performing vertical projection to perform horizontal movement track line monitoring of the bridge 1;

the swivel process monitoring device 3 is used for monitoring the deviation value of an actual track laser point of the laser vertical projection and horizontal monitoring device 2 and a ground theoretical projection track line 5 of the bridge 1 in the swivel process of the bridge 1 and measuring the deviation value of the actual vertical distance from the bridge 1 end of the laser vertical projection and horizontal monitoring device 2 to the ground and the theoretical vertical distance;

The swivel positioning device 4 is used for observing transverse and longitudinal deviation values generated under the action of external force or internal force in the process of standing and waiting for swivel at the starting point position of the ground theoretical projection trajectory line 5 of the bridge 1, and observing transverse and longitudinal deviation values of an actual trajectory laser point and a theoretical trajectory laser point of the laser vertical projection and horizontal monitoring device 2 at the end point position of the ground theoretical projection trajectory line 5 after the bridge 1 is actually swiveled in place.

The laser vertical projection and horizontal monitoring device 2 comprises four automatic leveling bases 21 and four mounting frames 22, wherein the four automatic leveling bases 21 are respectively connected to the upper sides of the four mounting frames 22, the four mounting frames 22 are respectively installed at four top corners of the bridge 1, the automatic leveling bases 21 comprise top plates 225 and bottom plates 224 which are arranged at intervals up and down, leveling devices for leveling the top plates 225 are arranged on the upper sides of the bottom plates 224, the leveling devices are connected with the top plates 225, connecting holes 227 are formed in the lower sides of the bottom plates 224, oval holes 237 are formed in the lower sides of the mounting frames 22, hollow bolts 238 are arranged in the oval holes 237, the bottom ends of the hollow bolts 238 are in threaded connection with the connecting holes 227 after passing through the oval holes 237, the outer sides of the hollow bolts 238 are in contact with the light surfaces on the inner sides of the oval holes 237, through holes 226 are formed in the upper sides of the top plates 225, mounting shafts 23 are arranged in the through holes 226, laser ranging modules 28 are arranged in the mounting shafts 23, and the output ends of the laser ranging modules 28 are arranged opposite to the central axes of the hollow bolts 238;

The laser ranging module 28 is used for emitting the indicating laser vertically downwards and measuring the distance from the automatic leveling base 21 to the ground.

The leveling device comprises a round horizontal bubble 231, a power supply 29, a rod end joint bearing 228, two supporting rods 229 and two groups of driving components 26, wherein the top plate 225 and the bottom plate 224 are of regular triangle structures, the round horizontal bubble 231, the power supply 29 and the two groups of driving components 26 are arranged on the upper side of the bottom plate 224, the lower end of the rod end joint bearing 228 is connected to one vertex of the bottom plate 224, the upper end of the rod end joint bearing 228 is hinged to one vertex of the top plate 225, the two supporting rods 229 are symmetrically arranged at the other two vertices of the bottom plate 224 along the central axis of the bottom plate 224, the upper ends of the two supporting rods 229 are respectively connected to the other two vertices of the top plate 225 in a threaded mode, the two groups of driving components 26 are connected with the power supply 29 and respectively control the rotation of the two supporting rods 229, a display component 27 is arranged on the upper side of the top plate 225, a control component 24 is arranged on the lower side of the top plate 225, and the power supply 29, the driving components 26 and the display component 27 are connected with the control component 24.

The laser vertical projection and horizontal monitoring device 2 further comprises a first motor 210, a pinion 211, a large gear 212, a prism frame 219, a second motor 213, a driving gear 214, a driven gear 215 and a prism head 220, wherein the first motor 210 is connected with the control assembly 24, the first motor 210 is connected to the lower side of the top plate 225, the pinion 211 is connected to the output end of the first motor 210, the large gear 212 is located in the through hole 226 and is in meshed connection with the pinion 211, the large gear 212 is sleeved on the outer peripheral surface of the lower end of the mounting shaft 23, the prism frame 219 is connected to the upper end of the mounting shaft 23, the second motor 213 is connected with the control assembly 24, the second motor 213 is connected to the outer side of the prism frame 219, the output end of the second motor 213 passes through the prism frame 219 and then is located on the inner side of the prism frame 219, the driving gear 214 is connected to the output end of the second motor 213, the driven gear 215 is in meshed connection with the driving gear 214, and the prism head 215 is connected to the driven gear 222 through the prism head 222.

The process monitoring device 3 that turns includes a plurality of coning tables 31, and a plurality of coning tables 31 are installed subaerial along ground theory projection trajectory 5, and a plurality of the up end of coning tables 31 all is the level and arranges, and the reflection paster 32 that has the cross sight is all installed to the up end of a plurality of coning tables 31, the cross sight center on the reflection paster 32 is located ground theory projection trajectory 5 and the perpendicular bisector coincidence of cross scale auxiliary line and ground theory projection trajectory 5, reflection paster 32 is used for carrying out the position indication of bridge 1 and reflecting laser to the laser that laser vertical projection and level monitoring devices 2 transmitted and carries out the range finding.

The swivel positioning device 4 comprises a stainless steel target 41 and a support frame 42, the support frame 42 is located on the ground, the stainless steel target 41 is connected to the upper side of the support frame 42, a cross coordinate scale 43 is arranged at the center of the upper end face of the stainless steel target 41, a plurality of arc holes 44 are formed in the upper end face of the stainless steel target 41, the arc holes 44 are circumferentially distributed relative to the center point of the cross coordinate scale 43 on the stainless steel target 41, threaded columns 45 are arranged in each arc hole 44, the lower ends of the threaded columns 45 are connected to the upper side of the support frame 42, two nuts 46 are connected to the outer peripheral surface of each threaded column 45 in a threaded mode, the two nuts 46 are located on the upper side and the lower side of the stainless steel target 41 respectively, a plurality of equidistant auxiliary scale rings 47 or square grids 48 are arranged at the center of the stainless steel target 41, and horizontal bubbles 6 and north needles 7 are arranged on the upper side of the stainless steel target 41.

s1, installing a laser vertical projection and horizontal monitoring device 2 at the end of a bridge 1, enabling the laser vertical projection and horizontal monitoring device 2 to vertically emit laser downwards, installing a group of swivel positioning devices 4 at laser points on the ground, setting the points as starting point positions of ground theoretical projection track lines 5, and enabling the centers of the swivel positioning devices 4 to be aligned with the centers of the laser points;

S2, marking a ground theoretical projection trajectory line 5 of the bridge 1 on a flat ground by using instrument equipment by taking the horizontal distance from the laser emission point of the laser vertical projection and horizontal monitoring device 2 to the rotation center of the bridge 1 as a radius, arranging a plurality of continuous intermediate points on the ground theoretical projection trajectory line 5, and installing a turning process monitoring device 3 at the intermediate points;

s3, arranging a group of swivel positioning devices 4 at the end position of the ground theoretical projection trajectory line 5, wherein the center of the swivel positioning devices 4 coincides with the laser vertical projection of the bridge 1 theoretical swivel in place and the laser emission point of the horizontal monitoring device 2;

s4, starting turning the bridge 1, observing whether a laser point emitted by the laser vertical projection and horizontal monitoring device 2 on the ground coincides with the center point of the turning process monitoring device 3 on the ground theoretical projection track line 5, and comparing the laser point with the theoretical vertical distance after ranging downwards, and if the space position coincides with the theoretical value, normally turning the bridge 1; if the space position deviation is large, adopting corresponding measures to treat the bridge 1 and continuing to rotate;

s5, after the bridge 1 is actually turned in place, observing whether a laser point emitted by the laser vertical projection and horizontal monitoring device 2 on the ground coincides with a center point of the turning positioning device 4 at the end position, if not, observing longitudinal and transverse deviation values of an actual track laser point of the laser vertical projection and horizontal monitoring device 2 and a theoretical track laser point and deviation values of an actual vertical distance of the bridge 1 and a theoretical vertical distance, and fine-tuning the posture of the bridge 1 by utilizing a hydraulic jack to enable the bridge 1 to reach the theoretical in-place position, and pouring concrete for anchoring between an upper bearing platform and a lower bearing platform.

In the steps S1 and S4, the four hollow bolts 238 are loosened to enable the four automatic leveling bases 21 to horizontally move along the oval holes 237 relative to the rotation center of the bridge 1, so that the rotation radii of the four automatic leveling bases 21 are the same and share one ground theoretical projection trajectory line 5, then the four hollow bolts 238 are tightened, the four automatic leveling bases 21 are fixed, meanwhile, the laser ranging module 28 emits laser downwards and measures the actual vertical distance between the end of the bridge 1 and the ground, during the rotation process of the bridge 1, the four laser points on the ground are compared with the ground theoretical projection trajectory line 5, and meanwhile, the four actual vertical distances are respectively compared with the theoretical vertical distances calculated after the previous measurement, when the laser points deviate from the ground theoretical projection trajectory line 5 or deviation occurs to the actual vertical distances, the bridge 1 is deflected during the rotation process, and when the deflection value exceeds the allowable value, corresponding measures are taken to treat the bridge 1 to continue the rotation.

In the step S4, when the bridge 1 is turned, the laser points projected by the laser vertical projection and horizontal monitoring device 2 are observed on the reflective patches 32, when the laser points deviate from the center of the auxiliary line of the cross scale, the actual movement track of the bridge 1 deviates from the theoretical movement track, the deviation value of the bridge 1 on the middle point is read out through the auxiliary line of the cross scale, the vertical distance on the middle point is measured, the initial elevation of the laser vertical projection and horizontal monitoring device 2 is used as the subtracted number, the elevations of the reflective patches 32 on the ground are respectively used as the subtracted number, the difference between the laser vertical projection and horizontal monitoring device and the reflective patches 32 is calculated as the actual vertical distance, then the actual vertical distance is compared with the theoretical vertical distance to obtain the deviation value of the vertical direction and the plane position of the bridge 1, the space monitoring of the projected track and the horizontal movement track of the bridge 1 is performed, and when the allowable value is exceeded, the corresponding measures are taken to realize the normal turning of the bridge 1.

In the steps S1, S3, S5, before the bridge 1 is turned, the initial point of the ground theoretical projection trajectory line 5 is firstly discharged by an instrument on the ground, then a supporting frame 42 is pre-buried at the initial position corresponding to the initial point, the supporting frame 42 moves to align the center of the cross coordinate scale 43 on the stainless steel plate target 41 with the laser point of the laser vertical projection and level monitoring device 2, then the compass 7 is observed, the stainless steel plate target 41 is horizontally rotated according to the angle of the compass 7, the arc-shaped hole 44 rotates around the fixed screw columns 45 to enable the cross coordinate axis of the stainless steel plate target 41 to be parallel to the longitudinal axis of the bridge 1, then the nut 46 on each screw column 45 is rotated, and when the horizontal bubble 6 is observed and the bubble is in the middle, the leveling of the stainless steel plate target 41 is completed. Then the ending point of the theoretical projection trajectory line 5 of the ground is discharged by an instrument on the ground, then another supporting frame 42 is placed at the ending point position corresponding to the ending point, the other supporting frame 42 is moved, one axis of the cross scale on the other stainless steel plate target 41 is overlapped with the perpendicular bisector of the ending point, and the other stainless steel plate target 41 is leveled according to the steps;

when the bridge 1 is turned into place, observing whether the laser point emitted by the laser vertical projection and horizontal monitoring device 2 to the ground coincides with the center point of the other stainless steel plate target 41, if not, reading out the transverse and longitudinal error value of the actual track laser point and the theoretical track laser point of the bridge 1 in place on the auxiliary scale ring 47 or the square grid 48 of the cross coordinate scale 43 by the laser vertical projection and horizontal monitoring device 2 at the end point position of the ground theoretical projection track line 5, and the deviation value of the actual vertical distance and the theoretical vertical distance measured by the laser vertical projection and horizontal monitoring device 2, and fine-adjusting the posture of the bridge 1 by the hydraulic jack to enable the bridge 1 to reach the theoretical in place position.

The principle of the invention is explained as follows:

in the invention, a ground theory projection track line 5 refers to a projection line which is vertically launched to the ground in a rotating process of a bridge 1 by simulating a laser vertical projection and horizontal monitoring device 2 along with the rotation of the bridge 1, a control component 24 adopts a singlechip, N middle points can be arranged on the uneven ground at every 1 DEG or 5 DEG corresponding to a rotation starting point according to the on-site condition, the middle points are connected into a continuous or intermittent track line, cement can be used as a frustum 31, a flat steel plate or a reflecting sheet and other opaque light reflection materials can be placed on the upper part of the frustum 31, a driving component 26 comprises a motor driver 216, two third motors 217 and two gear drive mechanisms 218, the motor driver 216 is connected with a control unit 23, the two third motors 217 are connected with the motor driver 216, the output ends of the third motors 217 are connected with the input ends of the gear drive mechanisms 218, the output ends of the gear drive mechanisms 218 are connected with the lower ends of support rods 229, a display component 27 comprises round horizontal bubbles 231, horizontal bubbles 6, a display 232 and a mechanical compass 233, a flat bottom plate 231 is connected with the horizontal bubble 225 and a top plate 225 is connected with the inner side of the laser compass 225, and the inner side of the laser compass 225 is connected with the laser reflector 225, and the inner side of the laser compass 225 is connected with the top plate 220.

Firstly, two angle steels 234 and two connecting steel plates 235 are welded into a mounting frame 22, a working steel plate 236 is welded on the connecting steel plates 235, the side surface is connected with the end of a bridge 1, a regular oval hole 237 is milled on the working steel plate 236, the diameter of the oval hole 237 is matched with the outer diameter of a hollow bolt 238 matched with the bottom plate 224, the end of the hollow bolt 238 faces downwards, a thread head upwards passes through the oval hole 237 of the working steel plate 236 and is then connected with the bottom plate 224 of the automatic leveling base 21 above, the three-dimensional coordinate value of the center of the automatic leveling base 21 is measured through a total station, the coordinate value and the coordinate value of the rotation center of the bridge 1 are calculated in a coordinate inverse way, thus the horizontal distance from the prism center to the rotation center of the bridge 1 can be calculated, the hollow bolt 238 is loosened to enable the automatic leveling base 21 to transversely move along the bridge 1 left and right, moving the four automatic leveling bases 21 to enable the rotation radiuses of the four automatic leveling bases 21 to be the same, sharing a ground theoretical projection trajectory line 5, screwing the hollow bolts 238 after adjustment, controlling the two third motors 217 to rotate through the single chip microcomputer, driving the two support rods 229 to rotate, enabling the top plate 225 to lift and level automatically, enabling laser of the laser ranging module 28 to pass through the hollow bolts 238 and align with the centers of stainless steel plate targets 41 on the ground, enabling the laser to emit the ground theoretical projection trajectory line 5, starting points and finishing points of the bridge 1 on the ground by using an instrument with the horizontal distance as the radius, enabling uneven positions on the ground theoretical projection trajectory line 5 to be smeared with a cement frustum 31 after plane points are emitted by using the instrument, then drawing the trajectory points on the cement frustum 31 and numbering sequentially, sequentially measuring heights and recording values of the cement frustum 31 or the ground points by using the instrument, enabling the stainless steel plate targets 41 to be aligned with the centers, the end point is positioned, the radius of the end point is coincided with one axis of the cross coordinate scale 43, so that the end point is convenient to read, and the stainless steel plate target 41 is leveled and aligned through the horizontal bubble 6 and the compass 7 when the ground is uneven.

In the rotation process of the bridge 1, the auxiliary lines of the cross scale are placed on the ground theoretical projection trajectory line 5 and the frustum 31, so that the horizontal transverse and longitudinal deviation values of the projection laser points and the ground theoretical projection trajectory line 5 can be read, the vertical distance measurement is carried out to obtain the vertical distance deviation value, the real-time posture of the bridge 1 is monitored in real time through the deviation value,

when the rotating body is fast in place, the stainless steel plate target 41 arranged at the position of the designed termination point on the ground is subjected to over-rotation or under-rotation guidance, concentric circles or cross auxiliary lines are arranged on the stainless steel plate target 41, the bridge 1 can be guided to be accurately positioned by the vertical laser projected by the laser ranging module 28, and when the bridge 1 slowly rotates to the point that the laser point is coincident with the origin of the coordinate axis of the stainless steel plate target 41 on the ground, the rotating body work is completed.

Example 1:

s1, loosening four hollow bolts 238 to enable the four automatic leveling bases 21 to horizontally move along oval holes 237 relative to the rotation center of a bridge 1, enabling the rotation radiuses of the four automatic leveling bases 21 to be the same and share one ground theoretical projection trajectory line 5, then screwing the four hollow bolts 238, fixing the four automatic leveling bases 21, simultaneously enabling a laser ranging module 28 to emit laser downwards and measure the actual vertical distance between the end head of the bridge 1 and the ground, installing a group of swivel positioning devices 4 at laser points on the ground, setting the points as starting point positions of the ground theoretical projection trajectory line 5, and enabling the centers of the swivel positioning devices 4 to be aligned with the centers of the laser points;

s4, starting turning the bridge 1, in the turning process of the bridge 1, comparing four laser points on the ground with a ground theoretical projection trajectory line 5, simultaneously comparing four actual vertical distances with theoretical vertical distances calculated after being measured in advance, when the laser points deviate from the ground theoretical projection trajectory line 5 or the actual vertical distances deviate, explaining that the bridge 1 deflects in the turning process, and when the space deviation is large, adopting corresponding measures formulated by an emergency plan to process to eliminate deviation values, and continuing turning the bridge 1;

Example 2:

the basic content is the same as in example 1, except that:

referring to fig. 5 to 11, the laser vertical projection and horizontal monitoring device 2 further includes a first motor 210, a pinion 211, a large gear 212, a prism frame 219, a second motor 213, a driving gear 214, a driven gear 215, and a prism head 220, wherein the first motor 210 is connected to the control unit 24, the first motor 210 is connected to the lower side of the top plate 225, the pinion 211 is connected to the output end of the first motor 210, the large gear 212 is located in the through hole 226 and is engaged with the pinion 211, the large gear 212 is sleeved on the outer peripheral surface of the mounting shaft 23 at the lower end, the prism frame 219 is connected to the upper end of the mounting shaft 23, the second motor 213 is connected to the control unit 24, the second motor 213 is connected to the outer side of the prism frame 219, the output end passes through the prism frame 219 and then is located at the inner side of the prism frame 219, the driving gear 214 is connected to the output end 215 of the second motor 213, the driven gear 212 is engaged with the driving gear 215 and is connected to the prism head 220 and is rotatably connected to the prism head 222.

Example 3:

the basic content is the same as in example 1, except that:

referring to fig. 4 and 13, the swivel process monitoring device 3 includes a plurality of frusta 31, the frusta 31 is installed on the ground along the ground theoretical projection trajectory 5, a plurality of the frusta 31 are all horizontally disposed, the reflecting patch 32 with the cross sight is installed on the upper end surface of the frusta 31, the center of the cross sight on the reflecting patch 32 is located on the ground theoretical projection trajectory 5 and the auxiliary line of the cross sight coincides with the perpendicular bisector of the ground theoretical projection trajectory 5, and the reflecting patch 32 is used for performing the position indication of the bridge 1 and the distance measurement of the reflected laser for the laser emitted by the laser perpendicular projection and horizontal monitoring device 2.

In the step S4, when the bridge 1 is turned, the laser points projected by the laser vertical projection and horizontal monitoring device 2 are observed on the reflective patches 32, when the laser points deviate from the center of the cross scale auxiliary line, the actual movement track of the bridge 1 deviates from the theoretical movement track, the deviation value of the bridge 1 at the middle point is read out through the cross scale auxiliary line, the distance at the middle point is measured, the initial elevation of the laser vertical projection and horizontal monitoring device 2 is used as the subtracted number, the elevations of the reflective patches 32 on the ground are respectively used as the subtracted number, the difference between the laser vertical projection and horizontal monitoring device and the laser vertical projection and horizontal monitoring device is calculated as the actual vertical distance, then the actual vertical distance is compared with the theoretical vertical distance to obtain the deviation value of the vertical direction and the plane position of the bridge 1, the spatial monitoring of the projected track and the horizontal movement track of the bridge 1 is performed, when the allowable value is exceeded, corresponding measures are taken according to the emergency plan, and the deviation value is adjusted to be within the allowable range, and then the bridge 1 is turned normally.

Example 4:

the basic content is the same as in example 1, except that:

referring to fig. 14 to 15, the swivel positioning device 4 includes a stainless steel target 41 and a supporting frame 42, the supporting frame 42 is located on the ground, the stainless steel target 41 is connected to the upper side of the supporting frame 42, a cross coordinate scale 43 is disposed at the center of the upper end surface of the stainless steel target 41, a plurality of arc holes 44 are formed in the upper end surface of the stainless steel target 41, the arc holes 44 are circumferentially distributed with respect to the center point of the cross coordinate scale 43 on the stainless steel target 41, a threaded column 45 is disposed in each arc hole 44, the lower end of the threaded column 45 is connected to the upper side of the supporting frame 42, two nuts 46 are screwed to the outer peripheral surface of the threaded column 45, the two nuts 46 are respectively located on the upper side and the lower side of the stainless steel target 41, a plurality of equidistant auxiliary scales 47 or square grids 48 are disposed at the center of the stainless steel target 41, and a horizontal bubble 6 and a north compass 7 are disposed on the upper side of the stainless steel target 41.

Example 5:

the basic content is the same as in example 1, except that:

referring to fig. 16, the swivel positioning device 4 includes a stainless steel target 41 and a support frame 42, the support frame 42 is located on the ground, the stainless steel target 41 is connected to the upper side of the support frame 42, a cross coordinate scale 43 is provided at the center of the upper end surface of the stainless steel target 41, a plurality of arc holes 44 are provided at the upper end surface of the stainless steel target 41, the arc holes 44 are circumferentially distributed with respect to the center point of the cross coordinate scale 43 on the stainless steel target 41, a threaded column 45 is provided in each arc hole 44, the lower end of the threaded column 45 is connected to the upper side of the support frame 42, two nuts 46 are connected to the outer peripheral surface of the threaded column 45 in a threaded manner, the two nuts 46 are respectively located on the upper side and the lower side of the stainless steel target 41, and a plurality of equidistant square grids 48 are provided at the center of the stainless steel target 41.

Claims

1. A bridge rotation space track monitoring system is characterized in that: the device comprises a laser vertical projection and horizontal monitoring device (2), a swivel process monitoring device (3) and two sets of swivel positioning devices (4), wherein the laser vertical projection and horizontal monitoring device (2) is arranged at the end of a bridge (1), the swivel process monitoring device (3) and the swivel positioning devices (4) are all arranged on the ground, the swivel process monitoring device (3) is positioned on a ground theoretical projection track line (5) which is formed by the laser vertical projection and horizontal monitoring device (2) vertically downwards in the theoretical swivel process of the bridge (1), and the two sets of swivel positioning devices (4) are respectively positioned at the starting point position and the end point position of the ground theoretical projection track line (5);

the laser vertical projection and horizontal monitoring device (2) is used for emitting laser vertically downwards at the end head of the bridge (1) to perform vertical projection of the outer contour of the bridge (1) to obtain an actual track laser point, and automatically measuring the actual vertical distance from the end head of the bridge (1) to the ground while performing vertical projection to perform horizontal movement track line monitoring of the bridge (1);

the swivel process monitoring device (3) is used for monitoring the deviation value of an actual track laser point of the laser vertical projection and horizontal monitoring device (2) and a ground theoretical projection track line (5) of the bridge (1) in the swivel process of the bridge (1) and measuring the deviation value of the actual vertical distance from the ground to the theoretical vertical distance of the laser vertical projection and horizontal monitoring device (2) arranged at the end of the bridge (1);

The swivel positioning device (4) is used for observing transverse and longitudinal deviation values of the bridge (1) under the action of external force or internal force in the process of standing and waiting for swivel at the starting point position of the ground theoretical projection trajectory line (5), and observing transverse and longitudinal deviation values of an actual trajectory laser point and a theoretical trajectory laser point of the laser vertical projection and horizontal monitoring device (2) at the end point position of the ground theoretical projection trajectory line (5) after the bridge (1) is actually swiveled in place.

2. The bridge swivel space trajectory monitoring system of claim 1, wherein: the laser vertical projection and horizontal monitoring device (2) comprises four automatic leveling bases (21) and four mounting frames (22), the four automatic leveling bases (21) are respectively connected to the upper sides of the four mounting frames (22), the four mounting frames (22) are respectively installed at four top angles of a bridge (1), the automatic leveling bases (21) comprise top plates (225) and bottom plates (224) which are arranged at intervals up and down, leveling devices for leveling the top plates (225) are arranged on the upper sides of the bottom plates (224), the leveling devices are connected with the top plates (225), connecting holes (227) are formed in the lower sides of the bottom plates (224), oval holes (237) are formed in the lower sides of the mounting frames (22), hollow bolts (238) are arranged in the oval holes (237), the bottoms of the hollow bolts (238) penetrate through the oval holes (237) and are connected with the connecting holes (227) in a threaded mode, the outer sides of the hollow bolts (238) are in contact with the inner sides of the oval holes (237), distance measuring devices (226) are arranged on the upper sides of the top plates (226), the laser shafts (23) are provided with distance measuring devices (23), the output end of the laser ranging module (28) is arranged relative to the central axis of the hollow bolt (238);

The laser ranging module (28) is used for emitting indication laser vertically downwards and measuring the distance from the automatic leveling base (21) to the ground.

3. The bridge swivel space trajectory monitoring system of claim 2, wherein: leveling device includes circle level bubble (231), power (29), rod end joint bearing (228), two bracing pieces (229) and two sets of drive assembly (26), roof (225) and bottom plate (224) are regular triangle structure, circle level bubble (231), power (29) and two sets of drive assembly (26) all set up in the upside of bottom plate (224), the lower extreme of rod end joint bearing (228) connect in one summit department of bottom plate (224), the upper end of rod end joint bearing (228) articulate in one summit department of roof (225), two bracing piece (229) are followed the central axis symmetry of bottom plate (224) arrange in two other summit departments of bottom plate (224), two the upper end of bracing piece (229) threaded connection respectively in two other summit departments of roof (225), two sets of drive assembly (26) all are connected and control two bracing pieces (229) rotation respectively, the upside of roof (225) are equipped with the drive assembly (27), the drive assembly (24) are connected with roof (24), the control assembly (24).

4. A bridge swivel space trajectory monitoring system according to claim 3, wherein: the laser vertical projection and horizontal monitoring device (2) further comprises a first motor (210), a pinion (211), a large gear (212), a prism holder (219), a second motor (213), a driving gear (214), a driven gear (215) and a prism head (220), wherein the first motor (210) is connected with the control assembly (24), the first motor (210) is connected to the lower side of the top plate (225), the small gear (211) is connected to the output end of the first motor (210), the large gear (212) is positioned in the through hole (226) and is meshed with the small gear (211), the large gear (212) is sleeved on the outer peripheral surface of the lower end of the mounting shaft (23), the prism holder (219) is connected to the upper end of the mounting shaft (23), the second motor (213) is connected with the control assembly (24), the second motor (213) is connected to the outer side of the prism holder (219) and the output end of the second motor (213) penetrates through the through hole (226) and is meshed with the driven gear (219) and is positioned at the outer peripheral surface of the lower end of the mounting shaft (23), the prism head (220) is rotatably connected to the prism frame (219) through a transverse shaft (222), and the driven gear (215) is sleeved on the transverse shaft (222).

5. The bridge swivel space trajectory monitoring system of claim 1, wherein: the utility model provides a process monitoring devices (3) of turning includes a plurality of awl platforms (31), and a plurality of awl platforms (31) are installed subaerial along ground theory projection trajectory (5), a plurality of the up end of awl platforms (31) all is the level and arranges, and reflection paster (32) that have the cross sight are all installed to the up end of a plurality of awl platforms (31), the cross sight center on reflection paster (32) is located ground theory projection trajectory (5) and the perpendicular bisector coincidence of cross scale auxiliary line and ground theory projection trajectory (5), reflection paster (32) are used for carrying out the position indication of bridge (1) and reflection laser to the laser that laser vertical projection and level monitoring devices (2) transmit and range finding.

6. The bridge swivel space trajectory monitoring system of claim 1, wherein: the utility model provides a stainless steel target positioning device (4) is including stainless steel target (41) and support frame (42), support frame (42) are located subaerial, stainless steel target (41) connect in the upside of support frame (42), the center department of the up end of stainless steel target (41) is provided with cross coordinate scale (43), a plurality of arc holes (44) have been seted up to the up end of stainless steel target (41)), a plurality of arc holes (44) for cross coordinate scale (43) central point on stainless steel target (41) is circumference distribution, every all be provided with screw thread post (45) in arc hole (44), the lower extreme of screw thread post (45) connect in the upside of support frame (42), the outer peripheral surface threaded connection of screw thread post (45) has two nuts (46), two nut (46) are located respectively the upper and lower both sides of stainless steel target (41), the center department of stainless steel target (41) is provided with a plurality of equidistant auxiliary ring (47) or is provided with on the horizontal direction (6) of bubble of north of grid (41), target (7).

7. A bridge swivel space track monitoring method is characterized in that: the monitoring method is applied to the bridge swivel space track monitoring system of any one of claims 1-6, and comprises the following steps:

s1, installing a laser vertical projection and horizontal monitoring device (2) at the end of a bridge (1), enabling the laser vertical projection and horizontal monitoring device (2) to vertically emit laser downwards, installing a group of swivel positioning devices (4) at laser points on the ground, setting the positions as starting point positions of ground theoretical projection track lines (5), and enabling the centers of the swivel positioning devices (4) to be aligned with the centers of the laser points;

s2, marking a ground theoretical projection trajectory line (5) of the bridge (1) on a flat ground by using instruments and equipment by taking the horizontal distance from the laser emission point of the laser vertical projection and horizontal monitoring device (2) to the rotation center of the bridge (1) as a radius, arranging a plurality of continuous intermediate points on the ground theoretical projection trajectory line (5), and installing a rotating body process monitoring device (3) at the intermediate points;

s3, arranging a group of swivel positioning devices (4) at the end position of a ground theoretical projection trajectory line (5), wherein the center of each swivel positioning device (4) coincides with the laser emission point of the laser vertical projection and horizontal monitoring device (2) after the theoretical swivel of the bridge (1) is in place;

S4, starting turning, observing whether a laser point emitted by the laser vertical projection and horizontal monitoring device (2) on the ground coincides with the central point of the turning process monitoring device (3) on a ground theoretical projection track line (5), and comparing the laser point with a theoretical vertical distance after ranging downwards, and if the spatial position coincides with the theoretical value, normally turning the bridge (1); if the space position deviation is large, adopting corresponding measures to treat the bridge (1) and continuing to rotate;

s5, after the bridge (1) is actually turned in place, observing whether a laser point emitted by the laser vertical projection and horizontal monitoring device (2) on the ground coincides with the center point of the turning positioning device (4) at the end position, if not, observing longitudinal and transverse deviation values of an actual track laser point of the laser vertical projection and horizontal monitoring device (2) and a theoretical track laser point and deviation values of an actual vertical distance and a theoretical vertical distance of the bridge (1), and finely adjusting the posture of the bridge (1) by utilizing a hydraulic jack so that the bridge (1) reaches the theoretical in-place position, and pouring concrete for anchoring between an upper bearing platform and a lower bearing platform.

8. The bridge swivel space trajectory monitoring method of claim 7, wherein the method comprises the steps of:

The laser vertical projection and level monitoring device (2) comprises four automatic leveling bases (21) and four mounting frames (22), the four automatic leveling bases (21) are respectively connected to the four upper sides of the mounting frames (22), the four mounting frames (22) are respectively installed at four top angles of a bridge (1), the automatic leveling bases (21) comprise top plates (225) and bottom plates (224) which are arranged at intervals up and down, leveling devices for leveling the top plates (225) are arranged on the upper sides of the bottom plates (224), the leveling devices are connected with the top plates (225), connecting holes (227) are formed in the lower sides of the bottom plates (224), oval holes (237) are formed in the lower sides of the mounting frames (22), hollow bolts (238) are arranged in the oval holes (237), the bottoms of the hollow bolts (238) penetrate through the oval holes (237) and are connected with the connecting holes (227) in a threaded mode, the outer sides of the hollow bolts (238) are in contact with the light surfaces of the inner sides of the oval holes (237), the upper sides of the hollow bolts (226) are provided with through holes (226), the laser ranging shafts (23) are formed in the upper sides of the top plates (226), the output end of the laser ranging module (28) is arranged relative to the central axis of the hollow bolt (238);

In the steps S1 and S4, the four hollow bolts (238) are loosened to enable the four automatic leveling bases (21) to horizontally move along the oval holes (237) relative to the rotation center of the bridge (1), the rotation radiuses of the four automatic leveling bases (21) are the same and share one ground theoretical projection trajectory line (5), then the four hollow bolts (238) are tightened, the four automatic leveling bases (21) are fixed, meanwhile, the laser ranging module (28) emits laser downwards and measures the actual vertical distance between the end head of the bridge (1) and the ground, in the rotating process of the bridge (1), the laser points on the four ground are compared with the ground theoretical projection trajectory line (5), meanwhile, the four actual vertical distances are respectively compared with the theoretical vertical distances calculated after the previous measurement, when the laser points deviate from the ground theoretical projection trajectory line (5), the bridge (1) is deflected in the rotating process, and corresponding measures are taken to treat the bridge (1) continuously when the deflection value exceeds the allowable value.

9. The bridge swivel space trajectory monitoring method of claim 7, wherein the method comprises the steps of:

the rotating body process monitoring device (3) comprises a plurality of conical tables (31), the conical tables (31) are arranged on the ground along a ground theoretical projection trajectory line (5), the upper end faces of the conical tables (31) are horizontally arranged, reflection patches (32) with cross-shaped stars are arranged on the upper end faces of the conical tables (31), the center of the cross-shaped stars on the reflection patches (32) is located on the ground theoretical projection trajectory line (5), and the auxiliary cross-shaped scale lines coincide with the perpendicular bisectors of the ground theoretical projection trajectory line (5);

In the step S4, when the bridge (1) rotates, the laser points projected by the laser vertical projection and horizontal monitoring device (2) are observed on the reflective patches (32), when the laser points deviate from the center of the cross scale auxiliary line, the actual movement track of the bridge (1) deviates from the theoretical movement track, the deviation value of the bridge (1) on the middle point is read out through the cross scale auxiliary line, the vertical distance on the middle point is measured, the initial elevation of the laser vertical projection and horizontal monitoring device (2) is used as the reduced number, the elevations of the reflective patches (32) on the ground are respectively used as the reduced number, the difference between the laser vertical projection and horizontal monitoring device (2) is calculated as the actual vertical distance, then the actual vertical distance is compared with the theoretical vertical distance to obtain the deviation value of the vertical direction and the plane position of the bridge (1), the space monitoring of the projection track and the horizontal movement track of the bridge (1) is performed, and when the allowable value is exceeded, the normal rotation of the bridge (1) is realized after corresponding measures are taken.

10. The bridge swivel space trajectory monitoring method of claim 7, wherein the method comprises the steps of:

the rotating body positioning device (4) comprises a stainless steel target (41) and a supporting frame (42), wherein the supporting frame (42) is positioned on the ground, the stainless steel target (41) is connected to the upper side of the supporting frame (42), a cross coordinate scale (43) is arranged at the center of the upper end face of the stainless steel target (41), a plurality of arc holes (44) are formed in the upper end face of the stainless steel target (41)), the arc holes (44) are distributed circumferentially relative to the center point of the cross coordinate scale (43) on the stainless steel target (41), threaded columns (45) are arranged in each arc hole (44), the lower ends of the threaded columns (45) are connected to the upper side of the supporting frame (42), two nuts (46) are connected to the outer peripheral surface of each threaded column (45), the two nuts (46) are respectively positioned on the upper side and the lower side of the stainless steel target (41), a plurality of equidistant auxiliary scale rings (47) or a plurality of square-shaped scale rings (48) are arranged at the center of the stainless steel target (41), and air bubbles (7) are arranged on the stainless steel target (41);

In the steps S1, S3 and S5, before the bridge (1) rotates, the initial point of a ground theoretical projection track line (5) is firstly discharged by an instrument on the ground, then a support frame (42) is pre-buried at the initial position corresponding to the initial point, the support frame (42) moves to enable the center of a cross coordinate scale (43) on a stainless steel plate target (41) to be aligned with the laser point of a laser vertical projection and horizontal monitoring device (2), then a compass (7) is observed, the stainless steel plate target (41) is horizontally rotated according to the angle of the compass (7), an arc-shaped hole (44) rotates around a fixed threaded column (45), so that the cross coordinate axis of the stainless steel plate target (41) is parallel to the longitudinal axis of the bridge (1), then nuts (46) on each threaded column (45) are rotated, and when horizontal bubbles (6) are observed, leveling of the stainless steel plate target (41) is completed. Then the ending point of the theoretical projection track line (5) of the ground is discharged by an instrument on the ground, then another supporting frame (42) is placed at the ending point position corresponding to the ending point, the other supporting frame (42) is moved, one axis of the cross scale on the other stainless steel plate target (41) is overlapped with the perpendicular bisector of the ending point, and the other stainless steel plate target (41) is leveled according to the steps;

When the bridge (1) is rotated to be in place, observing whether a laser point emitted by the laser vertical projection and horizontal monitoring device (2) to the ground coincides with the center point of the other stainless steel plate target (41), and if not, reading out the transverse and longitudinal error values of an actual track laser point and a theoretical track laser point of the bridge (1) at the end position of a ground theoretical projection track line (5) by the laser vertical projection and horizontal monitoring device (2) when the bridge (1) is in place on an auxiliary scale ring (47) or a square grid (48) of a cross coordinate scale (43), and finely adjusting the posture of the bridge (1) to the theoretical position by a hydraulic jack according to the deviation value of the actual vertical distance and the theoretical vertical distance measured by the laser vertical projection and horizontal monitoring device (2).