Shield construction disturbance detection equipment

Abstract

The invention discloses disturbance detection equipment for shield construction. The disturbance detection equipment comprises a mounting frame, a plurality of disturbance detection points arranged in an array and a point location early warning mechanism, the disturbance detection point comprises a base, a settlement rod, a displacement sensor, a first distance measuring head and a second distance measuring head, whether the settlement rod generates settlement displacement or not is detected through the displacement sensor, and the height change of the settlement rod is detected through the first distance measuring head; the point location early warning mechanism comprises range finders, an axis net module and an early warning module, position signals of the second range finding heads of the disturbance detection points are obtained through the range finders respectively, the position signals are fed back to the axis net module to obtain coordinate information of the disturbance point locations, an axis net diagram is generated according to the coordinate information and compared with an original axis net diagram, and when the change exceeds a threshold value, the early warning module is started. And an early warning alarm is sent to the background terminal through the early warning module. The ground surface change caused by shield disturbance is fed back in time, the accurate position of the ground surface change is obtained, the ground surface change is fed back to shield construction at any time for adjustment, and construction accidents are prevented.

Description

Technical Field

[0001] The invention relates to the technical field of engineering equipment, and in particular to a shield construction disturbance detection device. Background Art

[0002] The shield method is a fully mechanized construction method in the dark excavation method. It pushes the shield machine into the ground, and supports the surrounding rock with the shield shell and segments to prevent collapse into the tunnel. At the same time, the soil is excavated in front of the excavation face with a cutting device, transported out of the hole by an excavation machine, and pushed forward by a jack at the rear, and prefabricated concrete segments are assembled to form a mechanized construction method of the tunnel structure.

[0003] The shield method has the advantages of fast construction progress, strong adaptability to the strata, and little impact on the surrounding environment. It is widely used in the construction of urban subway tunnels. However, the shield construction process will inevitably disturb the surrounding rock and soil, causing the rock and soil to move. The displacement of the soil will cause deformation of the nearby bridge pile foundation, which may cause a catastrophic accident such as bridge collapse. The existing shield construction process will control the surface changes by observing soil changes and adjusting the soil chamber pressure and grouting volume. However, due to the different locations of soil changes during the construction process, there is a lack of equipment for disturbance monitoring, and it is impossible to timely detect the location of the disturbance changes and timely feedback and adjust the construction. Therefore, it is necessary to design a shield construction disturbance detection device that can detect surface changes in real time during the shield construction process and timely feedback the surface changes caused by the shield disturbance. Summary of the invention

[0004] The purpose of the present invention is to provide a shield construction disturbance detection device.

[0005] To achieve the above object, the present invention adopts the following technical solutions: A shield construction disturbance detection device, comprising a mounting frame, a plurality of disturbance detection points arranged in an array, and a point warning mechanism; The mounting frame includes a plurality of frames arranged at equal intervals, each of the frames being arranged on the ground surface of a predetermined construction path of the shield machine; Each of the disturbance detection points is connected to the frame through a traction rope. The disturbance detection point includes a base, a settlement rod, a displacement sensor, a first distance measuring head and a second distance measuring head. The base is connected to the frame through a traction rope and is placed on the ground below it. The base is provided with a detection port that is communicated with each other from top to bottom. The settlement rod is vertically arranged at the detection port. Whether the settlement rod is settled or displaced is detected by the displacement sensor. There are two first distance measuring heads, one is arranged on the settlement rod and the other is arranged on the base. The distance between the two first distance measuring heads is obtained. The second distance measuring head sends its position signal to the point warning mechanism. The point warning mechanism includes three rangefinders, an axis network module and an early warning module. The position signal of the second rangefinder of each disturbance detection point is obtained through each of the rangefinders, and the position signal is fed back to the axis network module to obtain the coordinate information of each disturbance point. The axis network diagram is generated according to the coordinate information, and the changes of each disturbance interference point are obtained in real time. The map is compared with the original axis network diagram. When the change exceeds the threshold, the early warning module sends a warning alarm to the background terminal.

[0006] Furthermore, the base includes a bottom plate and a hollow cylinder. The bottom plate is laid on the ground and is provided with at least 3 fixing holes for preventing displacement and a fixing rod inserted into the ground. The hollow cylinder is fixedly installed on the bottom plate and is arranged around the detection port. The bottom plate is provided with 2 guide columns in the hollow cylinder. The settlement rod is provided with a guide plate. The guide plate is provided with a guide port installed with the guide column. The guide rod is inserted into the guide port, and the guide plate cooperates with the guide rod to limit the settlement rod from moving up and down along the detection port.

[0007] Furthermore, the bottom plate is provided with at least two hanging rings, the traction rope is provided with at least two, and a hook installed with the hanging ring is provided at the bottom; the hollow cylinder is connected up and down, and the height of the guide column is higher than the height of the hollow cylinder.

[0008] Furthermore, the frame includes two support rods, a crossbeam and a plurality of rope drums with traction ropes. The two support rods are arranged on the ground on both sides of the predetermined construction path of the shield machine. The crossbeam is arranged on the top of the two support rods and spans the construction path. The disturbance detection points are arranged on the ground directly below the crossbeam, and each disturbance detection point is arranged at equal intervals. The rope drum is rotated at the bottom of the crossbeam through a rotating seat, and is provided with a servo motor and a meter. The traction rope is retracted and released by rotating the servo motor, and the meter measures the length of the traction rope; the point warning mechanism is arranged above the middle of the mounting frame.

[0009] Furthermore, the base is provided with at least two rope drums, and the lengths of the released traction ropes are respectively calculated by a meter.

[0010] Furthermore, the support pole is connected to at least three side pull ropes on the side and at least one top pull rope on the top. The side pull ropes are fixed to the ground by long nails, and the top pull rope is connected to surrounding buildings, trees or high poles arranged on the outside of the support pole; a balance rope is connected between two adjacent top pull ropes.

[0011] Furthermore, the crossbeam is provided with reinforcing ropes on both sides and respectively connected to the top pull ropes on both sides; and a plurality of balancing ropes are connected between two adjacent crossbeams.

[0012] Furthermore, the point warning mechanism is provided with a shell and a plurality of pull ropes, the shell is transversely arranged above the middle of the mounting frame, and is connected to the balance ropes on both sides through the pull ropes; three openings are provided at the bottom of the shell, and the three rangefinders are respectively installed in the three openings, and the point warning mechanism receives the position signal sent by each disturbance detection point in a predetermined sequence or when a disturbance occurs, and performs signal transmission and distance measurement with the second ranging head of the corresponding disturbance mechanism through each rangefinder, obtains the coordinates of the second ranging head of each disturbance mechanism, and generates an axis network diagram in combination with the height of the first ranging head, and compares it with the original axis network diagram. When the height difference of a disturbance detection point exceeds a threshold, an alarm message is generated and an early warning alarm is issued to the background terminal.

[0013] Furthermore, the rangefinder is one of an ultrasonic rangefinder, an infrared rangefinder or a laser rangefinder.

[0014] Furthermore, the rangefinders are arranged at equal intervals, and two of the three rangefinders are started, with any one of them serving as a signal transmitting end and the other serving as a signal receiving end, and the corresponding time parameters are recorded. Then, the other two rangefinders are started, and the same operation is performed, and the coordinates of the corresponding disturbance detection points are calculated according to the obtained time parameters.

[0015] After adopting the above technical solution, the present invention has the following advantages compared with the background technology: 1. On the shield construction path, the present invention forms an axis network structure through frames and disturbance detection points arranged at equal intervals, first generates an original axis network diagram, then detects the coordinates and height changes of each disturbance detection point in real time, generates the latest axis network diagram, and can be compared with the original axis network diagram in real time. On the one hand, the changes in the positions of each disturbance detection point can be intuitively seen, and on the other hand, an alarm can be quickly issued when the height difference exceeds a threshold, and the surface changes caused by the shield disturbance can be fed back in time and its accurate position can be obtained, and the feedback can be given to the shield construction at any time for adjustment to prevent the occurrence of construction accidents.

[0016] 2. The present invention identifies whether the settlement rod is displaced by means of a displacement sensor at a disturbance detection point, and can provide feedback to the point alarm mechanism immediately after the displacement occurs. The displacement data of the settlement rod calculated by the first ranging head and the coordinate data of the second ranging head can be combined to accurately draw the axis network diagram of each point. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a specific schematic diagram of the disturbance detection point of the present invention; Figure 3 It is a schematic diagram of the rope drum, servo motor and traction rope of the present invention; Figure 4It is a schematic diagram of the point warning mechanism and the second distance measuring head of the present invention; Figure 5 Schematic diagram of coordinates of the second ranging head of the present invention.

[0018] Description of reference numerals: Mounting frame 1; disturbance detection point 2; point warning mechanism 3; traction rope 4; frame 11; support rod 111; crossbeam 112; rope drum 113; servo motor 114; base 21; settlement rod 22; displacement sensor 23; first distance measuring head 24; second distance measuring head 25; bottom plate 211; hollow cylinder 212; guide column 213; guide plate 221; shell 31; pull rope 32. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0020] It should be noted that in the present invention, the terms "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element of the present invention must have a specific orientation, and therefore cannot be understood as a limitation on the present invention. Example

[0021] Cooperate Figures 1 to 5 As shown, the present invention discloses a shield construction disturbance detection device, including a mounting frame 1, a plurality of disturbance detection points 2 arranged in an array, and a point warning mechanism 3; The mounting frame 1 includes a plurality of frames 11 arranged at equal intervals, each frame 11 being arranged on the ground surface of a predetermined construction path of the shield machine. The spacing between the frames 11 is not limited in this embodiment and can be 1 meter, 2 meters, 3 meters, 5 meters, 10 meters or 15 meters, and is arranged according to the construction conditions.

[0022] Each disturbance detection point 2 is connected to the frame 11 through a traction rope 4. The disturbance detection point 2 includes a base 21, a settlement rod 22, a displacement sensor 23, a first ranging head 24 and a second ranging head 25. The base 21 is connected to the frame through a traction rope 4 and is placed on the ground below it. The base 21 is provided with a detection port that is connected up and down. The settlement rod 22 is vertically arranged at the detection port. The displacement sensor 23 is used to detect whether the settlement rod 22 is settled or displaced. There are two first ranging heads 24, one is arranged on the settlement rod 22, and the other is arranged on the base 21. The two first ranging heads are arranged relatively to each other up and down to obtain the distance between the two first ranging heads 24. The second ranging head 25 sends its position signal to the point warning machine 3.

[0023] The disturbance detection point 2 of the present embodiment is further provided with a first controller and a data transmission unit. The first controller is respectively connected to the displacement sensor 23, the two first ranging heads 24 and the second ranging head 25. Whether the settlement rod 22 is displaced up and down is detected by the displacement sensor 23, and the height change of the settlement rod 22 is monitored by the two first ranging heads 24, the height change of the settlement rod 22 is obtained, and the parameters are sent to the point warning mechanism 3 through the data transmission unit. The second ranging head 25 has a signal receiving and sending function. By timing or when the first ranging head 24 changes, it starts and transmits an activation signal to the point warning mechanism 3. The point warning mechanism 3 thus locates and obtains the coordinates of the second ranging head 25 of the point through the rangefinder.

[0024] The first distance measuring head 24 is preferably an infrared distance measuring head. When the sinker rod 22 is displaced, the displacement sensor 23 obtains the displacement data and feeds it back to the first controller. The first controller calculates the data between the two distance measuring heads by controlling the two first distance measuring heads 24 to send and receive infrared signals, and compares the data with the initial height to obtain the height change data. The height of the second distance measuring head 25 of the disturbance detection point 2 of this embodiment is the Z-axis data of the axis grid diagram.

[0025] This embodiment can also calculate the insertion depth of the ground surface in combination with the length data of the settlement rod 22 to ensure that the original insertion depth of each settlement rod 22 is consistent. The data transmission unit is preferably through Bluetooth communication, WiFi communication or GPRS communication, and the point warning mechanism 3 is provided with a corresponding communication module for data transmission.

[0026] The point warning mechanism 3 includes three distance meters, an axis network module and an early warning module. The position signal of the second distance measuring head 25 of each disturbance detection point 2 is obtained through each distance meter, and the position signal is fed back to the axis network module to obtain the coordinate information of each disturbance point. The axis network diagram is generated according to the coordinate information, and the changes of each disturbance interference point are obtained in real time. It is compared with the original axis network diagram. When the change exceeds the threshold, the early warning module sends a warning alarm to the background terminal.

[0027] The point warning module of this embodiment also includes a second controller. The axis network module and the warning module are controlled by the second controller, and data can also be transmitted with the background terminal through the corresponding communication module.

[0028] The base 21 includes a bottom plate 211 and a hollow cylinder 212. The bottom plate 211 is laid on the ground and is provided with at least 3 fixing holes for preventing displacement and a fixing rod inserted into the ground. The hollow cylinder 212 is fixedly installed on the bottom plate 211 and is arranged around the detection port. The bottom plate 211 is provided with two guide columns 213 in the hollow cylinder 212. The settlement rod 22 is provided with a guide plate 221. The guide plate 221 is provided with a guide port installed with the guide column 213. The guide rod 213 is inserted into the guide port, and the guide plate 221 cooperates with the guide rod 213 to limit the settlement rod 22 from moving up and down along the detection port.

[0029] The bottom plate is provided with at least two hanging rings, the traction rope 4 is provided with at least two, and a hook installed with the hanging ring is provided at the bottom; the hollow cylinder is connected up and down, and the height of the guide column is higher than the height of the hollow cylinder.

[0030] The length of the guide rod and the sinker rod 22 of this example is preferably higher than the height of the hollow column.

[0031] The frame 11 includes two support rods 111, a crossbeam 112 and a plurality of rope drums 113 with traction ropes 4. The two support rods 111 are arranged on the ground on both sides of the predetermined construction path of the shield machine. The crossbeam 112 is arranged on the top of the two support rods 111 and spans the construction path. The disturbance detection point 2 is arranged on the ground directly below the crossbeam 112. The disturbance detection points 2 are arranged at equal intervals. The rope drum 113 is rotated at the bottom of the crossbeam 112 through a rotating seat, and is provided with a servo motor 114 and a meter. The traction rope 4 is retracted and released by the servo motor 114, and the meter measures the length of the traction rope 4; the point warning mechanism 3 is arranged above the middle of the mounting frame 1.

[0032] The base 21 is provided with at least two rope drums 113, and the lengths of the released traction ropes 4 are respectively calculated by a meter.

[0033] At least three side pull ropes are connected to the side of the support pole 111 and at least one top pull rope is provided on the top. The side pull ropes are fixed to the ground by long nails, and the top pull rope is connected to the surrounding buildings, trees or high poles set outside the support pole 111; a balance rope is connected between two adjacent top pull ropes.

[0034] The cross beam 112 is provided with reinforcing ropes on both sides and respectively connected with the top pull ropes on both sides; a plurality of balancing ropes are connected between two adjacent cross beams 112 .

[0035] The purpose of using the traction rope 4, side pull rope, top pull rope and balance rope in this embodiment is to ensure that the position and height of the frame 11 remain unchanged and are not easily affected by the environment and change, so as to avoid detection errors. The traction rope 4 pulls the base 21, so that the base 21 is not easily displaced. At the same time, when the length of the settlement rod 22 is not enough, when the settlement change exceeds the threshold, the servo motor 114 releases the traction rope of a specified length, such as 5cm, 10cm, 20cm or 50cm, so that the base 21 can be flexibly adjusted according to the changes in the ground surface.

[0036] The point warning mechanism 3 is provided with a shell 31 and multiple pull ropes 32. The shell 31 is horizontally arranged above the middle of the mounting frame 1 and is connected to the balance ropes on both sides through the pull ropes 32. Three openings are provided at the bottom of the shell 31, and three rangefinders are respectively installed in the three openings. The point warning mechanism 3 communicates with each disturbance detection point 2 in a predetermined sequence or receives the position signal sent by it when a disturbance occurs. Through each rangefinder, the second ranging head 25 of the corresponding disturbance mechanism is used for signal transmission and reception and ranging, and the coordinates of the second ranging head 25 of each disturbance mechanism are obtained. Combined with the height of the first ranging head 24, an axis network diagram is generated and compared with the original axis network diagram. When the height difference of the disturbance detection point 2 exceeds the threshold, an alarm message is generated and an early warning alarm is issued to the background terminal.

[0037] The rangefinder is one of an ultrasonic rangefinder, an infrared rangefinder or a laser rangefinder.

[0038] The rangefinders are set at equal intervals, and two of the three rangefinders are started, with any one of them used as a signal transmitter and the other as a signal receiver. The corresponding time parameters are recorded, and then the other two rangefinders are started and the same operation is performed. The coordinates of the corresponding disturbance detection point 2 are calculated based on the obtained time parameters.

[0039] The rangefinder is provided with a signal transmitting and receiving unit and a timer. After calculating the signal transmission and reception, the timer generates a time parameter. Based on the time parameter and the corresponding signal transmission speed, the position data of the second ranging head 25 of the disturbance detection point 2 to be obtained is obtained.

[0040] The time parameter t obtained bd , t bc , t dc The details are as follows:

[0041] where t bd ,t bc and t dc are the time for transmitting and receiving signals between rangefinders bd, bc and dc respectively; Specific signal transmission speed c x The calculation formula is as follows:

[0042] The coordinates in the xy rectangular coordinate system are calculated as follows:

[0043] m and n are the spacings between two adjacent rangefinders, i.e., the spacing m between the BC rangefinders and the spacing n between the CD rangefinders. In this embodiment, m=n is preferred. θ is the angle between the straight line from the second distance head to the rangefinder and the straight line between the two rangefinders. x is the horizontal coordinate value of the second rangefinder 25 in the rectangular coordinate system. y is the vertical coordinate value of the second rangefinder 25 in the rectangular coordinate system. Figure 5 The A in represents the second ranging head.

[0044] In this embodiment, on the shield construction path, an axis network structure is formed by equally spaced frames 11 and equally spaced disturbance detection points 2. An original axis network diagram is first generated, and then the coordinates and height changes of each disturbance detection point 2 are detected in real time to generate the latest axis network diagram, which can be compared with the original axis network diagram in real time. On the one hand, the changes in the positions of each disturbance detection point 2 can be intuitively seen, and on the other hand, an alarm can be quickly issued when the height difference exceeds a threshold, so that the surface changes caused by the shield disturbance are fed back in time and its accurate position is obtained, and the feedback is given to the shield construction at any time for adjustment to prevent the occurrence of construction accidents.

[0045] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A shield construction disturbance detection device, characterized in that: It includes a mounting frame, multiple array-set disturbance detection points and point warning mechanisms; The mounting frame includes a plurality of frames arranged at equal intervals, each of the frames being arranged on the ground surface of a predetermined construction path of the shield machine; Each of the disturbance detection points is connected to the frame through a traction rope. The disturbance detection point includes a base, a settlement rod, a displacement sensor, a first distance measuring head and a second distance measuring head. The base is connected to the frame through a traction rope and is placed on the ground below it. The base is provided with a detection port that is communicated with each other from top to bottom. The settlement rod is vertically arranged at the detection port. Whether the settlement rod is settled or displaced is detected by the displacement sensor. There are two first distance measuring heads, one is arranged on the settlement rod and the other is arranged on the base. The distance between the two first distance measuring heads is obtained. The second distance measuring head sends its position signal to the point warning mechanism. The point warning mechanism includes three rangefinders, an axis network module and an early warning module. The position signal of the second rangefinder of each disturbance detection point is obtained through each of the rangefinders, and the position signal is fed back to the axis network module to obtain the coordinate information of each disturbance point. The axis network diagram is generated according to the coordinate information, and the changes of each disturbance interference point are obtained in real time. The map is compared with the original axis network diagram. When the change exceeds the threshold, the early warning module sends a warning alarm to the background terminal.

2. A shield construction disturbance detection device as claimed in claim 1, characterized in that: The base includes a bottom plate and a hollow cylinder. The bottom plate is laid on the ground and is provided with at least 3 fixing holes for preventing displacement and a fixing rod inserted into the ground. The hollow cylinder is fixedly installed on the bottom plate and is arranged around the detection port. The bottom plate is provided with 2 guide columns in the hollow cylinder. The settlement rod is provided with a guide plate. The guide plate is provided with a guide port installed with the guide column. The guide rod is inserted into the guide port, and the guide plate cooperates with the guide rod to limit the settlement rod from moving up and down along the detection port.

3. A shield construction disturbance detection device as claimed in claim 2, characterized in that: The bottom plate is provided with at least two hanging rings, the traction rope is provided with at least two, and a hook installed with the hanging ring is provided at the bottom; the hollow cylinder is connected up and down, and the height of the guide column is higher than the height of the hollow cylinder.

4. A shield construction disturbance detection device as claimed in claim 3, characterized in that: The frame includes two support rods, a crossbeam and a plurality of rope drums with traction ropes. The two support rods are arranged on the ground on both sides of the predetermined construction path of the shield machine. The crossbeam is arranged on the top of the two support rods and spans the construction path. The disturbance detection points are arranged on the ground directly below the crossbeam. The disturbance detection points are arranged at equal intervals. The rope drum is rotated at the bottom of the crossbeam through a rotating seat, and is provided with a servo motor and a meter. The traction rope is retracted and released by rotating the servo motor, and the meter measures the length of the traction rope. The point warning mechanism is arranged above the middle of the mounting frame.

5. A shield construction disturbance detection device as claimed in claim 4, characterized in that: The base is provided with at least two rope drums, and the lengths of the released traction ropes are respectively calculated by a meter.

6. A shield construction disturbance detection device as claimed in claim 4, characterized in that: The support pole is connected to at least three side pull ropes on the side and at least one top pull rope on the top. The side pull ropes are fixed on the ground by long nails, and the top pull rope is connected to surrounding buildings, trees or high poles arranged on the outside of the support pole; a balance rope is connected between two adjacent top pull ropes.

7. A shield construction disturbance detection device as claimed in claim 6, characterized in that: The cross beam is provided with reinforcing ropes on both sides and respectively connected with the top pulling ropes on both sides; a plurality of balancing ropes are connected between two adjacent cross beams.

8. A shield construction disturbance detection device as claimed in claim 7, characterized in that: The point warning mechanism is provided with a shell and a plurality of pull ropes. The shell is transversely arranged above the middle of the mounting frame and is connected to the balance ropes on both sides through the pull ropes. Three openings are provided at the bottom of the shell, and the three rangefinders are respectively installed in the three openings. The point warning mechanism receives the position signal sent by each disturbance detection point in a predetermined sequence or when a disturbance occurs, and performs signal transmission and distance measurement with the second rangefinder head of the corresponding disturbance mechanism through each rangefinder, obtains the coordinates of the second rangefinder head of each disturbance mechanism, generates an axis network diagram in combination with the height of the first rangefinder head, and compares it with the original axis network diagram. When the height difference of a disturbance detection point exceeds a threshold, an alarm message is generated and an early warning alarm is issued to the background terminal.

9. A shield construction disturbance detection device as claimed in claim 8, characterized in that: The rangefinder is one of an ultrasonic rangefinder, an infrared rangefinder or a laser rangefinder.

10. A shield construction disturbance detection device as claimed in claim 9, characterized in that: The rangefinders are arranged at equal intervals, and two of the three rangefinders are started, with any one of them serving as a signal transmitting end and the other serving as a signal receiving end, and the corresponding time parameters are recorded. Then, the other two rangefinders are started, and the same operation is performed, and the coordinates of the corresponding disturbance detection points are calculated according to the obtained time parameters.

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