阅读说明：本技术 一种隧道超前预报用液压伺服可控震源 (Hydraulic servo controllable seismic source for tunnel advance prediction ) 是由 杜立志 胡新民 张晓培 韩亚鲁 王勇 于 2021-01-17 设计创作，主要内容包括：本发明公开一种隧道超前预报用液压伺服可控震源,包括有承台、机械臂、第一液压杆、第二液压杆、激振锤、液压油箱和控制器,其中机械臂的底部铰接在承台上,第一液压杆的底部也铰接在承台上,第一液压杆的顶端固连在机械臂的上端底部,第一液压杆的伸缩能够带动机械臂绕着底部的铰接轴进行转动,机械臂的顶端枢接有旋转板,第二液压杆装配在机械臂的上部,第二液压杆的顶端固连在旋转板的一端,有益效果：加速度传感器与LVDT传感器可采集震源的加速信号与发力信号,激振频率可控,脉冲能量持续稳定,可明显提高可控震源工作效率,提高预报准确度,加快工程进展并提高经济效益。(The invention discloses a hydraulic servo controllable seismic source for tunnel advanced forecasting, which comprises a bearing platform, a mechanical arm, a first hydraulic rod, a second hydraulic rod, an excitation hammer, a hydraulic oil tank and a controller, wherein the bottom of the mechanical arm is hinged on the bearing platform, the bottom of the first hydraulic rod is also hinged on the bearing platform, the top end of the first hydraulic rod is fixedly connected to the bottom of the upper end of the mechanical arm, the mechanical arm can be driven to rotate around a hinged shaft at the bottom by stretching of the first hydraulic rod, a rotating plate is pivoted at the top end of the mechanical arm, the second hydraulic rod is assembled at the upper part of the mechanical arm, and the top end of the second hydraulic rod is fixedly connected to one end of the rotating plate, so that: the acceleration sensor and the LVDT sensor can acquire an acceleration signal and a force generation signal of a seismic source, the excitation frequency is controllable, the pulse energy is continuous and stable, the working efficiency of the controllable seismic source can be obviously improved, the prediction accuracy is improved, the engineering progress is accelerated, and the economic benefit is improved.)

1. A hydraulic servo controllable seismic source for tunnel advance forecasting is characterized in that: the hydraulic vibration machine comprises a bearing platform, a mechanical arm, a first hydraulic rod, a second hydraulic rod, a vibration exciter, a hydraulic oil tank and a controller, wherein the bottom of the mechanical arm is hinged on the bearing platform, the bottom of the first hydraulic rod is also hinged on the bearing platform, the top end of the first hydraulic rod is fixedly connected to the bottom of the upper end of the mechanical arm, the mechanical arm can be driven to rotate around a hinged shaft at the bottom by the extension and retraction of the first hydraulic rod, a rotating plate is pivoted at the top end of the mechanical arm, the second hydraulic rod is assembled on the upper portion of the mechanical arm, the top end of the second hydraulic rod is fixedly connected to one end of the rotating plate, the rotating plate can be driven to rotate around a hinged shaft between the rotating plate and the mechanical arm by the extension and retraction of the second hydraulic rod, a fixing frame is arranged at the rear portion of the rotating plate, the vibration exciter is assembled in the fixing frame, the first hydraulic rod, the second hydraulic rod and the vibration exciting hammer are all connected with a hydraulic oil pump through pipelines, the first hydraulic rod, the second hydraulic rod and the vibration exciting hammer are controlled to work by the hydraulic oil pump, the hydraulic oil pump is connected with a controller, and the controller controls the hydraulic oil pump to work.

2. The hydraulic servo controlled seismic source for the advance forecasting of the tunnel according to claim 1, wherein: the bearing platform is also provided with a support frame, and the controller is arranged on the top cover of the support frame.

3. The hydraulic servo controlled seismic source for the advance forecasting of the tunnel according to claim 1, wherein: the hydraulic oil pump is characterized in that a first electric control valve is arranged on a connecting pipeline between the hydraulic oil pump and the first hydraulic rod, a second electric control valve is arranged on a connecting pipeline between the hydraulic oil pump and the second hydraulic rod, a third electric control valve is arranged on a connecting pipeline between the hydraulic oil pump and the shock hammer, the hydraulic oil pump is further connected with a motor, the hydraulic oil pump is driven by the motor, and the first electric control valve, the second electric control valve, the third electric control valve and the motor are all connected with a controller and controlled to work by the controller.

4. The hydraulic servo controlled seismic source for the advance forecasting of the tunnel according to claim 1, wherein: the mount at rotor plate rear portion on be provided with the guide bar, the exciting hammer wears to establish on the guide bar, exciting hammer and guide bar sliding connection, the exciting hammer can slide along the guide bar, the bottom of guide bar has linked firmly the exciting plate, be provided with first acceleration sensor on the exciting plate, the top of exciting hammer is provided with second acceleration sensor, first acceleration sensor and second acceleration sensor all are connected with the controller, first acceleration sensor and second acceleration sensor can give the controller to the data real-time transmission of gathering, the both ends of exciting plate are provided with the gag lever post respectively, the top of two gag lever posts is connected with the clamp plate, be provided with air spring between clamp plate and the exciting plate.

5. The hydraulic servo controlled seismic source for the advance forecasting of the tunnel according to claim 1, wherein: the hydraulic oil pump vibration hammer is characterized in that an energy accumulator assembly is further arranged on a connecting pipeline between the hydraulic oil pump and the vibration hammer, the energy accumulator assembly is arranged on a connecting plate of the fixing frame and is connected with the vibration hammer through a hydraulic high-pressure oil pipe and a hydraulic low-pressure oil pipe, a servo valve is arranged at the joint of the hydraulic high-pressure oil pipe and the hydraulic low-pressure oil pipe and the vibration hammer and is connected with the controller and controlled by the controller to work, an LVDT sensor is assembled on the servo valve and is connected with the controller, and the LVDT sensor can transmit acquired data to the controller in real time.

Technical Field

The invention relates to a hydraulic servo controllable seismic source, in particular to a hydraulic servo controllable seismic source for tunnel advanced prediction.

Background

At present, with the improvement of the national economic level, the development demand of highway tunnel construction is greatly increased, and the difficult problem still exists in the tunnel construction process and needs to be overcome. At present, tunnel engineering for excavating tunnels by using TBM has a large proportion in tunnel construction engineering, and because the structure is huge and is greatly influenced by adverse geological conditions, in the underground tunnel construction, the geological condition of surrounding rocks is complex, and the tunnel construction is limited by economic and technical levels when the tunnel construction meets adverse geologic bodies such as karst, a loose bottom layer, a fault broken zone, a soft soil bottom layer and the like, and the characteristics of the adverse geologic bodies meeting the conditions in the tunnel excavation process are difficult to be completely found only through surface geological investigation work in the investigation and design stage, so that damages such as water burst, collapse and the like frequently occur, so that the advanced prediction of adverse geology in front of a tunnel face is realized when the TBM is excavated in a full section, and a construction plan and safety guarantee are particularly necessary for tunnel construction. The seismic wave method is a common tunnel advance geological prediction method at present, and the working efficiency is improved and the prediction accuracy is also improved by selecting a proper and effective seismic source. The explosion seismic source brings certain potential safety hazard to underground hidden engineering due to the instability influence on surrounding rocks caused by the existence of the explosion seismic source and possible harmful substances in explosion smoke, and meanwhile, the application of explosives requires approval procedures such as preparation and the like, and the process is complex; the pulse energy generated by ramming with a sledge hammer is disturbed by a large number of factors and works less efficiently. The seismic source which has stable energy, controllable frequency, high mechanical automation degree, safety, reliability, reusability and economic benefit improvement can be generated, and the problem to be solved at present is urgent.

Disclosure of Invention

The invention aims to provide a hydraulic servo controllable seismic source for advanced forecasting of an airborne tunnel, which aims to solve the problems in advanced forecasting of poor geologic bodies by a seismic wave method in the tunnel construction process.

The invention provides a hydraulic servo controlled seismic source for tunnel advanced forecasting, which comprises a bearing platform, a mechanical arm, a first hydraulic rod, a second hydraulic rod, an excitation hammer, a hydraulic oil tank and a controller, wherein the bottom of the mechanical arm is hinged on the bearing platform, the bottom of the first hydraulic rod is also hinged on the bearing platform, the top end of the first hydraulic rod is fixedly connected with the bottom of the upper end of the mechanical arm, the mechanical arm can be driven to rotate around a hinged shaft at the bottom by the extension and contraction of the first hydraulic rod, a rotating plate is pivoted at the top end of the mechanical arm, the second hydraulic rod is assembled at the upper part of the mechanical arm, the top end of the second hydraulic rod is fixedly connected with one end of the rotating plate, the rotating plate can be driven to rotate around a hinged shaft between the rotating plate and the mechanical arm by the extension and contraction of the second hydraulic rod, a fixing frame is arranged at the rear part, the hydraulic oil tank is also arranged on the bearing platform, a hydraulic oil pump is arranged on the hydraulic oil tank, the first hydraulic rod, the second hydraulic rod and the vibration exciting hammer are all connected with the hydraulic oil pump through pipelines, the first hydraulic rod, the second hydraulic rod and the vibration exciting hammer are controlled to work by the hydraulic oil pump, the hydraulic oil pump is connected with the controller, and the controller controls the work of the hydraulic oil pump.

The bearing platform is also provided with a support frame, and the controller is arranged on the top cover of the support frame.

The hydraulic oil pump is characterized in that a first electric control valve is arranged on a connecting pipeline between the hydraulic oil pump and the first hydraulic rod, a second electric control valve is arranged on a connecting pipeline between the hydraulic oil pump and the second hydraulic rod, a third electric control valve is arranged on a connecting pipeline between the hydraulic oil pump and the shock excitation hammer, the hydraulic oil pump is further connected with a motor, the hydraulic oil pump is driven by the motor, and the first electric control valve, the second electric control valve, the third electric control valve and the motor are all connected with a controller and controlled to work by the controller.

Be provided with the guide bar on the mount at rotor plate rear portion, the exciting hammer wears to establish on the guide bar, exciting hammer and guide bar sliding connection, the exciting hammer can slide along the guide bar, the bottom of guide bar has linked firmly the exciting plate, be provided with first acceleration sensor on the exciting plate, the top of exciting hammer is provided with second acceleration sensor, first acceleration sensor and second acceleration sensor all are connected with the controller, first acceleration sensor and second acceleration sensor can give the controller to the data real-time transmission of gathering, the both ends of exciting plate are provided with the gag lever post respectively, the top of two gag lever posts is connected with the clamp plate, be provided with air spring between clamp plate and the exciting plate.

An energy accumulator assembly is further arranged on a connecting pipeline between the hydraulic oil pump and the exciting hammer, the energy accumulator assembly is arranged on a connecting plate of the fixing frame, the energy accumulator assembly is connected with the exciting hammer through a hydraulic high-pressure oil pipe and a hydraulic low-pressure oil pipe, a servo valve is arranged at the connecting position of the hydraulic high-pressure oil pipe and the hydraulic low-pressure oil pipe and the exciting hammer, the servo valve is connected with the controller and controlled by the controller to work, an LVDT sensor is assembled on the servo valve and connected with the controller, and the LVDT sensor can transmit acquired data to the controller in real time.

Foretell first hydraulic stem, second hydraulic stem, exciting hammer, controller, hydraulic oil pump, first automatically controlled valve, second automatically controlled valve, third automatically controlled valve, motor, first acceleration sensor, second acceleration sensor, air spring, energy storage ware assembly, servo valve and LVDT sensor are the equipment of existing equipment, therefore specific model and specification are not repeated.

The working principle of the invention is as follows:

when the hydraulic servo controlled seismic source for tunnel advanced prediction is used, the bearing platform is fixed on a TBM tunnel excavation platform, the telescopic length of the second hydraulic rod is controlled by the controller, so that the rotating plate and the vibration excitation plate in the rear fixing frame are adjusted to be in parallel fit with the tunnel face, the angle of the mechanical arm is adjusted by controlling the telescopic length of the first hydraulic rod, the distance between the vibration excitation plate and the tunnel face is adjusted, and the hydraulic servo controlled seismic source is in a preparation working state.

The hydraulic oil pump is powered by a motor, hydraulic oil is transmitted to the first electric control valve, the second electric control valve and the third electric control valve from the hydraulic oil tank, the controller controls the first electric control valve, the second electric control valve and the third electric control valve to transmit the hydraulic oil to the first hydraulic rod, the second hydraulic rod and the exciting hammer respectively, each hydraulic oil pipe is fixed through a fixing component installed on the device, the hydraulic oil reaching the exciting hammer firstly passes through the energy accumulator assembly, enters the servo valve through the hydraulic low-pressure oil pipe and the hydraulic high-pressure oil pipe respectively, and then enters the exciting hammer to provide hydraulic energy for the exciting hammer.

The rotating plate is connected with the top end of the mechanical arm through a pin joint shaft, the rotating plate is connected with the exciting hammer through a fixing frame, the joint is fixed through a fixed connection nut, the rotating plate and the exciting hammer are integrated, and the rotating plate and the exciting hammer are kept to rotate synchronously in the extension process of the second hydraulic rod.

The controller is equipped with power switch and controls the opening and closing of first electric control valve, second electric control valve and third electric control valve respectively to adjust the flexible distance of first hydraulic stem and second hydraulic stem and the shutting of exciting hammer.

The first acceleration sensor, the second acceleration sensor and the LVDT sensor can acquire an acceleration signal and an output signal of a seismic source and transmit the acceleration signal and the output signal to the controller, an excitation parameter is input into the controller, the excitation signal is transmitted to the servo valve through the control wire harness, and the servo valve adjusts the excitation frequency of the excitation hammer according to the excitation parameter input by the controller, so that seismic waves with controllable frequency and continuous and stable energy are generated.

The invention has the beneficial effects that:

the hydraulic servo controlled seismic source for the machine-mounted tunnel advance forecasting can be directly installed and used on a TBM tunnel excavation platform through a machine-mounted base, advance geological forecasting can be conveniently carried out in the full-section excavation construction of a TBM tunnel, the hydraulic servo controlled seismic source is parallelly attached to a tunnel face through the telescopic adjustment of a first hydraulic rod and a second hydraulic rod, a rotating plate is connected with the tail end of a mechanical arm through a pin joint shaft and can be adjusted at a large angle, so that shock excitation on the tunnel face with different angles is met, an electronic device in the device is connected with a controller through a control wire harness, required shock excitation parameters are input into a servo valve in the controller, the hydraulic servo controlled seismic source generates seismic waves, an acceleration sensor and an LVDT sensor can acquire acceleration signals and force generation signals of the seismic source, the shock excitation frequency is controllable, the pulse energy is continuous and stable, and the working efficiency of the controlled seismic source can be obviously improved, the forecasting accuracy is improved, the engineering progress is accelerated, and the economic benefit is improved. The method has the advantages that the mechanical degree is high, and the problems of low working efficiency and unstable energy of the seismic source of the existing tunnel advanced geological forecast seismic wave method can be effectively solved.

Drawings

Fig. 1 is a schematic view of a main view structure of a hydraulic servo controllable seismic source.

Fig. 2 is a schematic structural diagram of the hydraulic oil tank.

Fig. 3 is a schematic view of a connection structure of the fixing frame and the exciting hammer according to the present invention.

The labels in the above figures are as follows:

1. bearing platform 2, mechanical arm 3, first hydraulic rod 4, second hydraulic rod 5 and exciting hammer

6. Hydraulic oil tank 7, controller 8, rotary plate 9, pivot shaft 10 and fixing frame

11. Hydraulic oil pump 12, support frame 13, first electric control valve 14, second electric control valve

15. Third electric control valve 16, motor 17, guide rod 18 and vibration excitation plate

19. First acceleration sensor 20, second acceleration sensor 21, gag lever post

22. Pressure plate 23, air spring 24, accumulator assembly 25 and hydraulic high-pressure oil pipe

26. Hydraulic low pressure oil pipe 27, servo valve 28, LVDT sensor.

Detailed Description

Please refer to fig. 1 to 3:

the invention provides a hydraulic servo controllable seismic source for airborne tunnel look-ahead, which comprises a bearing platform 1, a mechanical arm 2, a first hydraulic rod 3, a second hydraulic rod 4, an excitation hammer 5, a hydraulic oil tank 6 and a controller 7, wherein the bottom of the mechanical arm 2 is hinged on the bearing platform 1, the bottom of the first hydraulic rod 3 is also hinged on the bearing platform 1, the top end of the first hydraulic rod 3 is fixedly connected with the bottom of the upper end of the mechanical arm 2, the mechanical arm 2 can be driven to rotate around a hinged shaft at the bottom by the extension and retraction of the first hydraulic rod 3, a rotating plate 8 is pivoted at the top end of the mechanical arm 2, the second hydraulic rod 4 is assembled at the upper part of the mechanical arm 2, the top end of the second hydraulic rod 4 is fixedly connected at one end of an excitation rotating plate 8, the rotation plate 8 can be driven to rotate around a hinged shaft 9 between the mechanical arm 2 by the extension and retraction of the second hydraulic rod 4, a fixing, the rotor plate 8 pivoted in-process can drive the exciting hammer 5 and carry out synchronous rotation, hydraulic tank 6 also establishes on cushion cap 1, be provided with hydraulic oil pump 11 on the hydraulic tank 6, first hydraulic stem 3, second hydraulic stem 4 and exciting hammer 5 all are connected with hydraulic oil pump 11 through the pipeline, first hydraulic stem 3, second hydraulic stem 4 and exciting hammer 5 are by hydraulic oil pump 11 control work, hydraulic oil pump 11 is connected with controller 7, controller 7 control hydraulic oil pump 11's work.

The bearing platform 1 is also provided with a support frame 12, and the controller 7 is arranged on the top cover of the support frame 12.

A first electric control valve 13 is arranged on a connecting pipeline between the hydraulic oil pump 11 and the first hydraulic rod 3, a second electric control valve 14 is arranged on a connecting pipeline between the hydraulic oil pump 11 and the second hydraulic rod 4, a third electric control valve 15 is arranged on a connecting pipeline between the hydraulic oil pump 11 and the exciting hammer 5, the hydraulic oil pump 11 is further connected with a motor 16, the hydraulic oil pump 11 is driven by the motor 16, and the first electric control valve 13, the second electric control valve 14, the third electric control valve 15 and the motor 16 are all connected with the controller 7 and controlled by the controller 7 to work.

The fixing frame 10 at the rear part of the rotating plate 8 is provided with a guide rod 17, the vibration hammer 5 penetrates through the guide rod 17, the vibration hammer 5 is connected with the guide rod 17 in a sliding mode, the vibration hammer 5 can slide along the guide rod 17, the bottom end of the guide rod 17 is fixedly connected with a vibration plate 18, a first acceleration sensor 19 is arranged on the vibration plate 18, the top end of the vibration hammer 5 is provided with a second acceleration sensor 20, the first acceleration sensor 19 and the second acceleration sensor 20 are both connected with the controller 7, the first acceleration sensor 19 and the second acceleration sensor 20 can transmit collected data to the controller 7 in real time, two ends of the vibration plate 18 are respectively provided with limiting rods 21, the top ends of the two limiting rods 21 are connected with a pressing plate 22, and an air spring 23 is arranged between the pressing plate 22 and the vibration plate 18.

An energy accumulator assembly 24 is further arranged on a connecting pipeline between the hydraulic oil pump 11 and the exciting hammer 5, the energy accumulator assembly 24 is arranged on a connecting plate of the fixing frame 10, the energy accumulator assembly 24 is connected with the exciting hammer 5 through a hydraulic high-pressure oil pipe 25 and a hydraulic low-pressure oil pipe 26, a servo valve 27 is arranged at the connecting position of the hydraulic high-pressure oil pipe 25 and the hydraulic low-pressure oil pipe 26 and the exciting hammer 5, the servo valve 27 is connected with the controller 7 and is controlled by the controller 7 to work, an LVDT sensor 28 is assembled on the servo valve 27, the LVDT sensor 28 is connected with the controller 7, and the LVDT sensor 28 can transmit acquired data to the controller 7 in real time.

The first hydraulic rod 3, the second hydraulic rod 4, the vibration exciter 5, the controller 7, the hydraulic oil pump 11, the first electric control valve 13, the second electric control valve 14, the third electric control valve 15, the motor 16, the first acceleration sensor 19, the second acceleration sensor 20, the air spring 23, the accumulator assembly 24, the servo valve 27 and the LVDT sensor 28 are all assembled by existing equipment, and therefore specific models and specifications are not described in detail.

The working principle of the invention is as follows:

when the hydraulic servo controlled seismic source for tunnel advanced prediction is used, the bearing platform 1 is fixed on a TBM tunnel excavation platform, the telescopic length of the second hydraulic rod 4 is controlled through the controller 7, the rotating plate 8 and the excitation plate 18 in the rear fixing frame 10 are adjusted to be attached to the tunnel face in parallel, the angle of the mechanical arm 2 is adjusted through controlling the telescopic length of the first hydraulic rod 3, the distance between the excitation plate 18 and the tunnel face is adjusted, and the hydraulic servo controlled seismic source is enabled to reach a preparation working state.

The hydraulic oil pump 11 is powered by a motor 16, hydraulic oil is transmitted to a first electric control valve 13, a second electric control valve 14 and a third electric control valve 15 from a hydraulic oil tank 6, a controller 7 controls the first electric control valve 13, the second electric control valve 14 and the third electric control valve 15 to transmit the hydraulic oil to a first hydraulic rod 3, a second hydraulic rod 4 and the exciting hammer 5 respectively, each hydraulic oil pipe is fixed through a fixing component arranged on the device, the hydraulic oil reaching the exciting hammer 5 firstly passes through an energy accumulator assembly 24, enters a servo valve 27 through a hydraulic low-pressure oil pipe 26 and a hydraulic high-pressure oil pipe 25 respectively, and then enters the exciting hammer 5 to provide hydraulic energy for the exciting hammer 5.

The rotating plate 8 is connected with the top end of the mechanical arm 2 through a pivot shaft 9, the rotating plate 8 is connected with the exciting hammer 5 through a fixing frame 10, the joint is fixed through a fixed connection nut, the rotating plate 8 and the exciting hammer 5 are integrated, and the rotating plate 8 and the exciting hammer 5 keep synchronous rotation in the extension and retraction process of the second hydraulic rod 4.

The controller 7 is equipped with a power switch to control the opening and closing of the first electric control valve 13, the second electric control valve 14 and the third electric control valve 15 respectively, so as to adjust the telescopic distance of the first hydraulic rod 3 and the second hydraulic rod 4 and the closing of the vibration exciter 5.

The first acceleration sensor 19, the second acceleration sensor 20 and the LVDT sensor 28 can acquire an acceleration signal and an output signal of a seismic source and transmit the acceleration signal and the output signal to the controller 7, an excitation parameter is input into the controller 7, the excitation signal is transmitted to the servo valve 27 through a control wire harness, and the servo valve 27 adjusts the excitation frequency of the excitation hammer 5 according to the excitation parameter input by the controller 7, so that seismic waves with controllable frequency and continuous and stable energy are generated.