Monitoring device for circular foundation pit construction of bridge

Abstract

The invention belongs to the technical field of foundation pit construction monitoring, and discloses a monitoring device for bridge circular foundation pit construction, which comprises an assembly seat and a monitoring part, the bottom of the assembly seat is rotatably connected with triangular support legs, and the bottom surface of the assembly seat is fixedly provided with a composite power part. By switching the vacuum suction direction and matching with the reversing effect of vacuum suction, after one end of the total station for monitoring is inserted into a soil layer in a reinforced manner, the linkage assembly is driven to move downwards relatively by utilizing the negative pressure effect, and downward pressure is applied to the triangular supporting legs; therefore, one end of the total station for monitoring is inserted into the soil layer, and the other end of the total station for monitoring presses the soil layer at the top of the soil layer, so that the device has relative pressing force on the soil layer of the positioning area besides insertion damping force, the stability of the total station for monitoring in the positioning monitoring area is comprehensively improved, and the reference point to be monitored in the foundation pit is accurately monitored. And the monitoring accuracy of each parameter in foundation pit construction is improved in a mode of fully improving the positioning stability.

Description

Technical Field

[0001] The invention belongs to the technical field of foundation pit construction monitoring, and in particular relates to a monitoring device for circular foundation pit construction of a bridge. Background Art

[0002] Circular foundation pit of bridge is a common form of foundation pit in bridge engineering, which is mainly used for the construction of piers, abutments and expanded foundations. The monitoring device for circular foundation pit of bridge is an important equipment to ensure the safety and quality of foundation pit construction. These devices are usually used to monitor the changes of various physical quantities of the foundation pit during the construction process, such as displacement, settlement, stress, strain, etc., so as to timely discover and deal with potential safety hazards. Among them, the most widely used monitoring device is the total station, which monitors and compares the reference points outside the foundation pit with the reference points inside the foundation pit, realizes the changes inside the foundation pit, and completes the monitoring and processing.

[0003] The monitoring device for circular foundation pit construction of bridges in the prior art is usually a total station with benchmark points and reference points to achieve continuous monitoring operations. During the monitoring process, in order to improve the stability of the monitoring data, the monitoring total station is required to be in a stable positioning area outside the foundation pit, and a stable method or structure is used to ensure the stability of the monitoring total station and achieve accurate monitoring. However, during the actual positioning process, it is affected by the soil layer near the foundation pit. It is actually difficult for the total station assembled on the tripod to achieve stable fixation in a soft or hard positioning area. The current direct insertion method is relatively simple and has poor stability, and the operation of auxiliary equipment affects equipment monitoring, and the operation is complicated. The stability of the total station in actual construction monitoring is difficult to guarantee, and the accuracy of the monitoring data cannot be strictly guaranteed, and the actual monitoring effect is not good. Summary of the invention

[0004] The object of the present invention is to provide a monitoring device for circular foundation pit construction of a bridge to solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions: a monitoring device for circular foundation pit construction of a bridge, comprising an assembly seat and a monitoring part, the bottom of the assembly seat is rotatably connected with a triangular support leg, the bottom surface of the assembly seat is fixedly installed with a composite power part, the bottom of the composite power part is fixedly connected with a drill rod, a linkage component is slidably installed inside the drill rod, a guide frame is fixedly provided on the outside of the linkage component, one end of the guide frame is slidably sleeved with the triangular support leg, a threaded sheet is provided at the bottom of the outer surface of the drill rod, a vacuum suction component is provided inside the drill rod, soil layer cutting components are swingably installed on both sides of the drill rod, an opening and closing control part is provided inside the drill rod, and the vacuum suction component sucks the gas inside the drill rod and forms a negative pressure interval;

[0006] The drill rod comprises a drill rod body, a sliding cavity, an inner cavity and an adapting groove, wherein the sliding cavity and the inner cavity are both opened inside the drill rod body and communicate with each other, and the adapting groove is symmetrically opened on both sides of the drill rod body;

[0007] The opening and closing control part includes a fixing ring, a sealing ring, a spring 1 and a vent hole, and the opening and closing control part is located in the internal cavity;

[0008] The soil layer cutting assembly includes a cutting plate, a movable plug plate, a rigid rope, a fixed shaft and a push rod. The movable plug plate is movably sleeved in the internal cavity, and the push rod pushes the opening and closing control part to switch the vacuum suction direction.

[0009] Preferably, the composite power unit includes an electric push rod, a mounting frame and a rotating motor, the fixed end of the electric push rod is fixedly mounted on the bottom surface of the assembly seat, the mounting frame is fixedly mounted on the movable end of the electric push rod, the rotating motor is fixed in the mounting frame, and the output shaft of the rotating motor is fixedly connected to the drill pipe body.

[0010] Preferably, the vacuum suction assembly includes a vacuum pump, a fixed conduit and a side port, the vacuum pump is fixedly installed in a side reserved cavity at the top end of the drill rod body, the fixed conduit is fixedly sleeved inside the drill rod body, the upper end of the fixed conduit is fixedly connected to the suction end of the vacuum pump, the lower end of the fixed conduit extends into the internal cavity, and the side port is opened on the outer surface of the fixed conduit near the lower end.

[0011] Preferably, the cutting plate is movably sleeved in the adapting groove, the fixed shaft is fixedly connected in the adapting groove and its outer surface is rotatably sleeved with the cutting plate, the rigid rope is fixedly connected between the cutting plate and the movable stopper plate, the push rod is fixedly connected to the top of the movable stopper plate, a groove is provided on the top of the movable stopper plate, the groove is adapted to the bottom end of the fixed guide tube, and the top of the cutting plate is a slicing structure distributed in an array.

[0012] Preferably, the fixing ring is fixedly sleeved on the outer side of the bottom end of the fixed conduit and fixedly sleeved in the internal cavity, the sealing ring is movably sleeved on the outer side of the fixed conduit and movably sleeved in the internal cavity, the spring is fixedly connected between the sealing ring and the fixing ring, the side port is located on the moving path of the sealing ring, and the vent is opened on the top surface of the sealing ring.

[0013] Preferably, the linkage assembly includes a sliding block, a connecting ring, a sleeve rod and a movable ring, the sliding block is slidably sleeved in the sliding cavity, the connecting ring is sleeved on the outside of the drill rod body and fixedly connected to the sliding block, the sleeve rod is fixedly connected to the bottom surface of the sliding block and movably sleeved in the internal cavity, and the movable ring is fixedly connected to the bottom surface of the sleeve rod and movably sleeved in the internal cavity.

[0014] Preferably, one end of the guide frame is an arc-shaped rod and the other end is a straight rod, the arc-shaped portion of the guide frame is slidably sleeved with the triangular support leg, and the outer side surface of the triangular support leg is threadedly sleeved with a locking bolt.

[0015] Preferably, a cover plate is fixedly provided on the top of the monitoring portion, a composite protection component is fixedly provided on the top surface of the assembly seat, and the cover plate is located above the composite protection component.

[0016] Preferably, the composite protection component includes an arc frame, an arc transparent plate, an internal frame, a second spring and a control valve, the arc frame is fixedly connected to the top of the assembly seat, the arc transparent plate is movably sleeved inside the arc frame and is symmetrically distributed, the internal frame is fixedly sleeved inside the arc frame, the second spring is fixedly connected between the internal frame and the arc transparent plate, and the control valve is fixedly sleeved in the middle of the inner side of the arc frame.

[0017] Preferably, an air pump is provided inside the assembly seat, and an air outlet end of the air pump is connected to the inside of the arc frame.

[0018] The beneficial effects of the present invention are as follows:

[0019] 1. The present invention utilizes a drill rod to be inserted into the soil of a positioning area while rotating and moving downward, and cooperates with a vacuum suction component and a start-and-stop control unit to control the vacuum suction direction. During the initial suction, the air pressure in the lower space of the internal cavity is sucked downward, and the negative pressure effect is used to realize the flipping of the soil layer cutting component, and further cut into the soil layer, and cooperate with multi-faceted contact to realize stable positioning inserted into the soil layer. At the same time, in cooperation with the action after further soil layer cutting, the vacuum suction direction is switched, and in cooperation with the reversing effect of the vacuum suction, after one end of the monitoring total station is inserted into the soil layer, the negative pressure effect is used to drive the linkage component to move downward relatively, and downward pressure is applied to the triangular support legs, so that one end of the monitoring total station is inserted into the soil layer and the other end presses the soil layer at the top of the soil layer, so that the device has a relative pressing force on the soil layer in the positioning area in addition to the insertion damping force, and comprehensively improves the stability of the monitoring total station in the positioning monitoring area, thereby accurately monitoring the reference points to be monitored in the foundation pit, and improving the monitoring accuracy of various parameters in the foundation pit construction by fully improving the positioning stability.

[0020] 2. The present invention reuses the combination of the composite power unit and the drill rod, and can fix the hard bottom surface by drilling and inserting. With the help of the threaded sheet on the drill rod, sufficient internal damping is maintained after drilling, thus overcoming the problem that the hard bottom surface cannot be effectively fixed, greatly improving the scope of practical use, and having better adaptability and good practical effect for monitoring the positioning area near the bottom.

[0021] 3. The present invention forms a semi-enclosed closed space outside the monitoring part by adding a composite protection component on the top of the assembly seat and cooperating with the cover plate fixed on the top of the monitoring part. During normal operation, gas is input into the composite protection component through an air pump, and the control valve is opened to allow the airflow to fully pass through various places on the outer surface of the monitoring part to complete the purging and cooling protection. When rainy weather occurs, the internal air pressure of the composite protection component is increased by closing the control valve and using the input gas, and the internal air pressure is used to push the arc-shaped transparent plate to slide and cover the front end of the monitoring part, thereby achieving completely closed protection and rapid switching between heat dissipation protection and moisture-proof protection, with good protection effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention;

[0023] Figure 2 It is a schematic diagram of the connection between the composite power unit and the drill pipe of the present invention;

[0024] Figure 3 is a schematic diagram of a drill rod of the present invention;

[0025] Figure 4 It is a cross-sectional schematic diagram of the drill rod and the soil layer cutting assembly of the present invention;

[0026] Figure 5 It is a cross-sectional schematic diagram of a drill pipe and a vacuum suction assembly of the present invention;

[0027] Figure 6 for Figure 5 A schematic diagram of the structure enlargement at the center A;

[0028] Figure 7 It is a schematic diagram of the sleeve connection between the fixed conduit and the opening and closing control part of the present invention;

[0029] Figure 8 is a schematic diagram of the linkage assembly of the present invention;

[0030] Fig. 9 A schematic diagram of a soil layer cutting assembly of the present invention;

[0031] Fig.10 It is a schematic diagram of the opening and closing control part of the present invention;

[0032] Fig.11 It is a cross-sectional schematic diagram of the assembly seat and the composite protection component of the present invention;

[0033] Fig.12 It is a transverse cross-sectional view of the composite protection component of the present invention.

[0034] In the figure: 1, assembly seat; 2, monitoring unit; 3, triangular support leg; 4, composite power unit; 41, electric push rod; 42, mounting frame; 43, rotating motor; 5, drill rod; 51, drill rod body; 52, sliding cavity; 53, internal cavity; 54, adapter groove; 6, threaded sheet; 7, soil layer cutting assembly; 71, cutting plate; 72, movable plug plate; 73, rigid rope; 74, fixed shaft; 75, push rod; 8, linkage assembly; 81, sliding block; 82, connecting ring; 83. Sleeve rod; 84. Movable ring; 9. Guide frame; 10. Vacuum suction assembly; 101. Vacuum pump; 102. Fixed guide tube; 103. Side port; 11. Opening and closing control unit; 111. Fixed ring; 112. Sealing ring; 113. Spring 1; 114. Vent hole; 12. Cover plate; 13. Composite protection assembly; 131. Arc frame; 132. Arc transparent plate; 133. Internal frame; 134. Spring 2; 135. Control valve; 14. Air pump. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] like Figures 1 to 12 As shown, an embodiment of the present invention provides a monitoring device for circular foundation pit construction of a bridge, comprising an assembly seat 1 and a monitoring part 2, wherein a triangular support leg 3 is rotatably connected to the bottom of the assembly seat 1, a composite power part 4 is fixedly installed on the bottom surface of the assembly seat 1, a drill rod 5 is fixedly connected to the bottom of the composite power part 4, a linkage assembly 8 is slidably installed inside the drill rod 5, a guide frame 9 is fixedly provided on the outside of the linkage assembly 8, one end of the guide frame 9 is slidably sleeved with the triangular support leg 3, a threaded sheet 6 is provided at the bottom of the outer surface of the drill rod 5, a vacuum suction assembly 10 is provided inside the drill rod 5, soil layer cutting assemblies 7 are swingably installed on both sides of the drill rod 5, an opening and closing control part 11 is provided inside the drill rod 5, and the vacuum suction assembly 10 sucks the gas inside the drill rod 5 and forms a negative pressure interval;

[0037] The drill rod 5 includes a drill rod body 51, a sliding cavity 52, an internal cavity 53 and an adapting groove 54. The sliding cavity 52 and the internal cavity 53 are both opened inside the drill rod body 51 and communicate with each other. The adapting groove 54 is symmetrically opened on both sides of the drill rod body 51.

[0038] The opening and closing control part 11 includes a fixing ring 111, a sealing ring 112, a spring 113 and a vent hole 114. The opening and closing control part 11 is located in the internal cavity 53;

[0039] The soil layer cutting assembly 7 includes a cutting plate 71, a movable plug plate 72, a rigid rope 73, a fixed shaft 74 and a push rod 75. The movable plug plate 72 is movably sleeved in the internal cavity 53, and the push rod 75 pushes the opening and closing control part 11 to switch the vacuum suction direction.

[0040] Embodiment 1: When using monitoring, select a suitable positioning area, arrange the monitoring total station at the positioning area, start the electric push rod 41 in the composite power unit 4, push the mounting frame 42 and the drill rod 5 downward to squeeze the bottom soil, and start the rotating motor 43 at the same time, so that the drill rod 5 and the threaded sheet 6 rotate synchronously and drill downward into the soil layer, and during the drilling process, the sliding sleeve linkage assembly 8 is kept motionless by the resistance of the guide frame 9 and the triangular support leg 3. As the drill rod 5 goes deep into the soil, the movable ring 84 at the lower end of the linkage assembly 8 is relatively far away from the opening and closing control unit 11 in the internal cavity 53. After the insertion is completed, start the vacuum suction assembly 10, so that the vacuum pump 101 sucks the internal gas of the internal cavity 53 through the fixed conduit 102. At this time, the opening and closing control unit 11 seals the side port 103. As the air pressure in the lower space of the internal cavity 53 decreases, the movable plug plate 72 in the soil layer cutting assembly 7 moves upward under negative pressure and pulls the rigid rope 73. As the rigid rope 73 pulls the outer The cutting plate 71 rotates around the fixed axis 74 and further cuts into the soil layer. As the movable plug plate 72 moves up and drives the push rod 75 to move upward, the swing of the soil layer cutting component 7 is completed. At the same time, the upward push rod 75 pushes the sealing ring 112 in the opening and closing control part 11 to move upward and open the side port 103. At this time, the lower end of the fixed guide tube 102 is nested in the top of the movable plug plate 72 and sealed, and the side port 103 is opened. As the vacuum suction component 10 continues to start, the air pressure in the upper space of the internal cavity 53 decreases, and the movable ring 84 in the relatively distant linkage component 8 is adsorbed to move downward, and a downward force is applied to the linkage component 8 under the relative pressure difference, so that the guide frame 9 exerts a force downward on the triangular support leg 3, and the triangular support leg 3 presses the bottom surface downward, and the monitoring total station is firmly inserted and clamped in the positioning area; when the ground in the optimal monitoring area is relatively solid, by starting the composite power unit 4, the drill rod 5 is inserted into the hard bottom area and is completely relatively fixed.

[0041] First, by using the drill rod 5 to be inserted into the soil of the positioning area while rotating and moving downward, and cooperating with the vacuum suction direction control of the vacuum suction component 10 and the opening and closing control unit 11, during the initial suction, the air pressure in the lower space of the internal cavity 53 is sucked downward, and the soil layer cutting component 7 is turned over by the negative pressure effect, and further cuts into the soil layer, and cooperates with multi-faceted contact to achieve stable positioning inserted into the soil layer. At the same time, in conjunction with the action after further soil layer cutting, the vacuum suction direction is switched, and the reversing effect of the vacuum suction is cooperated. At one end of the monitoring total station After being reinforced and inserted into the soil layer, the negative pressure effect is used to drive the linkage assembly 8 to move downward relatively, and downward pressure is applied to the triangular support leg 3, so that one end of the monitoring total station is inserted into the soil layer and the other end presses the soil layer on the top of the soil layer, so that in addition to the insertion damping force, the device also has a relative compression force on the soil layer in the positioning area, which comprehensively improves the stability of the monitoring total station in the positioning monitoring area, thereby accurately monitoring the reference points to be monitored in the foundation pit, and improving the monitoring accuracy of various parameters in the foundation pit construction by fully improving the positioning stability.

[0042] In addition, by reusing the combination of the composite power unit 4 and the drill rod 5, the hard bottom surface can also be fixed by drilling and inserting. With the help of the threaded sheet 6 on the drill rod 5, sufficient internal damping is maintained after drilling, overcoming the problem that the hard bottom surface cannot be effectively fixed, greatly improving the scope of actual use, and having better adaptability and good practical effect for monitoring the positioning area near the bottom surface.

[0043] Among them, the composite power unit 4 includes an electric push rod 41, a mounting frame 42 and a rotating motor 43. The fixed end of the electric push rod 41 is fixedly installed on the bottom surface of the assembly seat 1, the mounting frame 42 is fixedly installed on the movable end of the electric push rod 41, the rotating motor 43 is fixed in the mounting frame 42, and the output shaft of the rotating motor 43 is fixedly connected to the drill rod body 51.

[0044] The composite power unit 4 provides the power for the drill rod 5 to insert into and break the hard ground, completes the soil layer insertion action, and achieves initial positioning stability.

[0045] Among them, the vacuum suction assembly 10 includes a vacuum pump 101, a fixed conduit 102 and a side port 103. The vacuum pump 101 is fixedly installed in the side reserved cavity at the top of the drill rod body 51. The fixed conduit 102 is fixedly sleeved inside the drill rod body 51. The upper end of the fixed conduit 102 is fixedly connected to the suction end of the vacuum pump 101. The lower end of the fixed conduit 102 extends into the internal cavity 53. The side port 103 is opened on the outer surface of the fixed conduit 102 near the lower end.

[0046] The vacuum suction component 10 realizes the swing cutting of the soil layer cutting component 7 and the downward force of the linkage component 8 by changing the vacuum suction direction twice, providing a force to press the device downward on the ground to achieve an enhanced fixation effect.

[0047] Among them, the cutting plate 71 is movably sleeved in the adapting groove 54, the fixed shaft 74 is fixedly connected in the adapting groove 54 and its outer surface is rotatably sleeved with the cutting plate 71, the rigid rope 73 is fixedly connected between the cutting plate 71 and the movable plug plate 72, the push rod 75 is fixedly connected to the top of the movable plug plate 72, and a groove is opened on the top of the movable plug plate 72, which is adapted to the bottom end of the fixed guide tube 102, and the top of the cutting plate 71 is an array-distributed slicing structure.

[0048] The soil layer cutting component 7 is further inserted into the soil layer by swinging on both sides at the same time, and the array-distributed slicing structure is combined to greatly increase the contact area with the soil layer, thereby improving friction damping and further improving stability. The upward force of the soil layer cutting component 7 on the soil layer and the downward force of the triangular support legs 3 on the ground are used to further complete the clamping and fixing effect of the installation and fixing area, thereby enhancing stability, improving monitoring accuracy, and avoiding offset errors caused by changes in the positioning area.

[0049] Among them, the fixing ring 111 is fixedly sleeved on the outer side of the bottom end of the fixing conduit 102 and fixedly sleeved in the internal cavity 53, the sealing ring 112 is movably sleeved on the outer side of the fixing conduit 102 and movably sleeved in the internal cavity 53, the spring 113 is fixedly connected between the sealing ring 112 and the fixing ring 111, the side port 103 is located on the moving path of the sealing ring 112, and the vent hole 114 is opened on the top surface of the sealing ring 112.

[0050] The opening and closing control part 11 seals the side opening 103 through the sealing ring 112, and limits the vacuum suction direction downward when sealing. When opening, the bottom seal of the fixed conduit 102 makes the vacuum suction direction upward through the vent hole 114, thereby realizing the change of the vacuum suction direction. The spring 113 provides the power for the subsequent resetting of the seal.

[0051] Among them, the linkage assembly 8 includes a sliding block 81, a connecting ring 82, a sleeve rod 83 and a movable ring 84. The sliding block 81 is slidably sleeved in the sliding cavity 52, the connecting ring 82 is sleeved on the outer side of the drill pipe body 51 and fixedly connected to the sliding block 81, the sleeve rod 83 is fixedly connected to the bottom surface of the sliding block 81 and movably sleeved in the internal cavity 53, and the movable ring 84 is fixedly connected to the bottom surface of the sleeve rod 83 and movably sleeved in the internal cavity 53.

[0052] Among them, one end of the guide frame 9 is an arc-shaped rod and the other end is a straight rod. The arc-shaped part of the guide frame 9 is slidably sleeved with the triangular support leg 3, and the outer side surface of the triangular support leg 3 is threadedly sleeved with a locking bolt.

[0053] The arc-shaped rod section of the guide frame 9 adapts to the arc-shaped swinging and opening trajectory of the triangular support leg 3, providing a downward pressing force for the triangular support leg 3 while ensuring that the triangular support leg 3 can swing stably and adjust to open, and the locking bolt is used to clamp and fix the triangular support leg 3 to avoid displacement when strengthening the fixation.

[0054] Among them, a cover plate 12 is fixedly provided on the top of the monitoring part 2, and a composite protection component 13 is fixedly provided on the top surface of the assembly seat 1. The cover plate 12 is located above the composite protection component 13. The composite protection component 13 includes an arc frame 131, an arc transparent plate 132, an internal frame 133, a second spring 134 and a control valve 135. The arc frame 131 is fixedly connected to the top of the assembly seat 1, the arc transparent plate 132 is movably sleeved in the interior of the arc frame 131 and is symmetrically distributed, the internal frame 133 is fixedly sleeved in the interior of the arc frame 131, the second spring 134 is fixedly connected between the internal frame 133 and the arc transparent plate 132, the control valve 135 is fixedly sleeved in the middle of the inner side of the arc frame 131, and an air pump 14 is provided inside the assembly seat 1, and the air outlet end of the air pump 14 is connected to the interior of the arc frame 131.

[0055] The air pump 14 cooperates with the opening and closing of the control valve 135 to provide heat dissipation air volume and waterproof and sealed power respectively, and the composite protection component 13 provides enhanced heat dissipation protection and waterproof and moisture-proof protection. The actual protection mode switching is fast, the operation is simple, and it can be remotely controlled. Spring 2 134 provides reset power, and the arc-shaped transparent plate 132 ensures that the reference point in the foundation pit can still be monitored outward under cover. A damping pad (not shown in the figure) is provided on the outer side of the arc-shaped transparent plate 132 to ensure dynamic sealing sliding in the arc frame 131 to avoid air leakage.

[0056] Embodiment 2: When used for normal outdoor monitoring, start the air pump 14 and keep the control valve 135 started. When the air pump 14 inputs gas into the composite protection component 13, the input gas is blown out through the opened control valve 135 in the arc frame 131. A large amount of flowing gas is introduced into the annular space surrounded by the arc frame 131 and the cover plate 12, and the monitoring part 2 is purged. The monitoring part 2 is blown out along the front notch of the arc frame 131 after being contacted by the flowing air volume, so as to provide complete heat dissipation protection. When rainy weather occurs during the monitoring period, the control valve 135 is quickly closed, and the gas input into the arc frame 131 continuously fills and increases the internal air pressure, so that the air pressure pushes the arc transparent plates 132 connected on both sides to slide out and merge into the front section of the monitoring part 2, so as to complete the closed waterproof protection.

[0057] Firstly, by adding a composite protection component 13 on the top of the assembly seat 1 and cooperating with the cover plate 12 fixed on the top of the monitoring part 2, a semi-enclosed closed space is formed outside the monitoring part 2. During normal operation, gas is input into the composite protection component 13 through the air pump 14, and by opening the control valve 135, the air flow is fully passed through various places on the outer surface of the monitoring part 2 to complete the purging and cooling protection. When rainy weather occurs, the internal air pressure of the composite protection component 13 is increased by closing the control valve 135 and using the input gas, and the internal air pressure is used to push the arc-shaped transparent plate 132 to slide and cover the front end of the monitoring part 2, thereby achieving completely closed protection and realizing rapid switching between heat dissipation protection and moisture-proof protection, with good protection effect.

[0058] The working principle and use process of the present invention are as follows: when using monitoring, a suitable positioning area is selected, and the monitoring total station is arranged at the positioning area. The electric push rod 41 in the composite power unit 4 is started to push the mounting frame 42 and the drill rod 5 downward to squeeze the bottom soil. At the same time, the rotating motor 43 is started to make the drill rod 5 and the threaded sheet 6 rotate synchronously and drill downward into the soil layer. During the drilling process, the sliding sleeve linkage assembly 8 is kept stationary by the resistance of the guide frame 9 and the triangular support leg 3. As the drill rod 5 goes deep into the soil, the movable ring 84 at the lower end of the linkage assembly 8 is relatively far away from the opening and closing control unit 11 in the internal cavity 53. After the insertion is completed, the vacuum suction assembly 10 is started so that the vacuum pump 1 01 The internal gas of the internal cavity 53 is sucked through the fixed conduit 102. At this time, the opening and closing control part 11 seals the side opening 103. As the air pressure in the lower space of the internal cavity 53 decreases, the movable plug plate 72 in the soil layer cutting component 7 moves upward under the negative pressure and pulls the rigid rope 73. As the rigid rope 73 pulls the outer cutting plate 71, the cutting plate 71 rotates around the fixed axis 74 and further cuts into the soil layer. As the movable plug plate 72 moves upward and drives the push rod 75 to move upward, the swing of the soil layer cutting component 7 is completed. At the same time, the upward push rod 75 pushes the sealing ring 112 in the opening and closing control part 11 to move upward and open the side opening 103. At this time, the lower end of the fixed conduit 102 is nested in The top of the movable plug plate 72 is sealed, and the side port 103 is opened. As the vacuum suction assembly 10 continues to start, the air pressure in the upper space of the internal cavity 53 decreases, and the movable ring 84 in the relatively distant linkage assembly 8 is adsorbed to move downward, and a downward force is applied to the linkage assembly 8 under the relative pressure difference, so that the guide frame 9 exerts a force downward on the triangular support leg 3, and the triangular support leg 3 presses the bottom surface downward, and the monitoring total station is firmly inserted and clamped in the positioning area; when the ground in the best monitoring area is relatively solid, by starting the composite power unit 4, the drill rod 5 is inserted into the hard bottom area and is completely relatively fixed; when used for normal outdoor monitoring, the air pump 14 is started and the control valve 13 is maintained 5 is started. When the air pump 14 inputs gas into the composite protection component 13, the input gas is blown out of the arc frame 131 through the opened control valve 135. A large amount of flowing gas is introduced into the annular space surrounded by the arc frame 131 and the cover plate 12, and the monitoring part 2 is purged. After the flowing air volume contacts various parts of the monitoring part 2, it is blown out along the front notch of the arc frame 131 to provide complete heat dissipation protection. When rainy weather occurs during the monitoring period, the control valve 135 is quickly closed, and the gas input into the arc frame 131 continuously fills and increases the internal air pressure, so that the air pressure pushes the arc transparent plates 132 sleeved on both sides to slide out and merge into the front section of the monitoring part 2 to complete the closed waterproof protection.

[0059] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A monitoring device for circular foundation pit construction of a bridge, comprising an assembly seat (1) and a monitoring unit (2), characterized in that: The bottom of the assembly seat (1) is rotatably connected to a triangular support leg (3), the bottom surface of the assembly seat (1) is fixedly mounted with a composite power unit (4), the bottom of the composite power unit (4) is fixedly connected with a drill rod (5), a linkage assembly (8) is slidably mounted inside the drill rod (5), a guide frame (9) is fixedly mounted on the outside of the linkage assembly (8), one end of the guide frame (9) is slidably sleeved with the triangular support leg (3), a threaded sheet (6) is provided at the bottom of the outer surface of the drill rod (5), a vacuum suction assembly (10) is provided inside the drill rod (5), soil layer cutting assemblies (7) are swivellably mounted on both sides of the drill rod (5), an opening and closing control unit (11) is provided inside the drill rod (5), and the vacuum suction assembly (10) sucks gas inside the drill rod (5) to form a negative pressure zone; The drill rod (5) comprises a drill rod body (51), a sliding cavity (52), an internal cavity (53) and an adapting groove (54); the sliding cavity (52) and the internal cavity (53) are both arranged inside the drill rod body (51) and are in communication with each other; and the adapting groove (54) is symmetrically arranged on both sides of the drill rod body (51); The opening and closing control part (11) comprises a fixing ring (111), a sealing ring (112), a spring (113) and a vent hole (114); the opening and closing control part (11) is located in the internal cavity (53); The soil layer cutting assembly (7) comprises a cutting plate (71), a movable plug plate (72), a rigid rope (73), a fixed shaft (74) and a push rod (75); the movable plug plate (72) is movably sleeved in the internal cavity (53); and the push rod (75) pushes the opening and closing control unit (11) to switch the vacuum suction direction.

2. A monitoring device for circular foundation pit construction of a bridge according to claim 1, characterized in that: The composite power unit (4) comprises an electric push rod (41), a mounting frame (42) and a rotary motor (43); the fixed end of the electric push rod (41) is fixedly mounted on the bottom surface of the assembly seat (1); the mounting frame (42) is fixedly mounted on the movable end of the electric push rod (41); the rotary motor (43) is fixed in the mounting frame (42); and the output shaft of the rotary motor (43) is fixedly connected to the drill rod body (51).

3. A monitoring device for circular foundation pit construction of a bridge according to claim 2, characterized in that: The vacuum suction assembly (10) comprises a vacuum pump (101), a fixed conduit (102) and a side port (103); the vacuum pump (101) is fixedly installed in a side reserved cavity at the top of a drill rod body (51); the fixed conduit (102) is fixedly sleeved inside the drill rod body (51); the upper end of the fixed conduit (102) is fixedly connected to the suction end of the vacuum pump (101); the lower end of the fixed conduit (102) extends into the internal cavity (53); and the side port (103) is opened on the outer surface of the fixed conduit (102) near the lower end.

4. A monitoring device for circular foundation pit construction of a bridge according to claim 3, characterized in that: The cutting plate (71) is movably sleeved in the adapting groove (54), the fixed shaft (74) is fixedly connected in the adapting groove (54) and its outer surface is rotatably sleeved with the cutting plate (71), the rigid rope (73) is fixedly connected between the cutting plate (71) and the movable plug plate (72), the push rod (75) is fixedly connected to the top of the movable plug plate (72), the top of the movable plug plate (72) is provided with a groove, and the groove is adapted to the bottom end of the fixed guide tube (102), and the top of the cutting plate (71) is a slice structure distributed in an array.

5. A monitoring device for circular foundation pit construction of a bridge according to claim 4, characterized in that: The linkage assembly (8) comprises a sliding block (81), a connecting ring (82), a sleeve rod (83) and a movable ring (84); the sliding block (81) is slidably sleeved in the sliding cavity (52); the connecting ring (82) is sleeved on the outer side of the drill rod body (51) and fixedly connected to the sliding block (81); the sleeve rod (83) is fixedly connected to the bottom surface of the sliding block (81) and movably sleeved in the internal cavity (53); and the movable ring (84) is fixedly connected to the bottom surface of the sleeve rod (83) and movably sleeved in the internal cavity (53).

6. A monitoring device for circular foundation pit construction of a bridge according to claim 5, characterized in that: The fixing ring (111) is fixedly sleeved on the outer side of the bottom end of the fixing conduit (102) and fixedly sleeved in the internal cavity (53); the sealing ring (112) is movably sleeved on the outer side of the fixing conduit (102) and movably sleeved in the internal cavity (53); the spring 1 (113) is fixedly connected between the sealing ring (112) and the fixing ring (111); the side opening (103) is located on the moving path of the sealing ring (112); and the vent hole (114) is opened on the top surface of the sealing ring (112).

7. A monitoring device for circular foundation pit construction of a bridge according to claim 6, characterized in that: One end of the guide frame (9) is an arc-shaped rod and the other end is a straight rod. The arc-shaped portion of the guide frame (9) is slidably sleeved with the triangular support leg (3). The outer side surface of the triangular support leg (3) is threadedly sleeved with a locking bolt.

8. A monitoring device for circular foundation pit construction of a bridge according to claim 7, characterized in that: A cover plate (12) is fixedly provided on the top of the monitoring part (2), a composite protection component (13) is fixedly provided on the top surface of the assembly seat (1), and the cover plate (12) is located above the composite protection component (13).

9. A monitoring device for circular foundation pit construction of a bridge according to claim 8, characterized in that: The composite protection component (13) comprises an arc frame (131), an arc transparent plate (132), an inner frame (133), a second spring (134) and a control valve (135); the arc frame (131) is fixedly connected to the top of the assembly seat (1); the arc transparent plate (132) is movably sleeved inside the arc frame (131) and symmetrically distributed; the inner frame (133) is fixedly sleeved inside the arc frame (131); the second spring (134) is fixedly connected between the inner frame (133) and the arc transparent plate (132); and the control valve (135) is fixedly sleeved in the middle of the inner side surface of the arc frame (131).

10. A monitoring device for circular foundation pit construction of a bridge according to claim 9, characterized in that: An air pump (14) is provided inside the assembly seat (1), and an air outlet end of the air pump (14) is connected to the inside of the arc frame (131).

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