Ultra-large-diameter shield prefabricating and assembling starting guide table device

Abstract

The invention relates to the technical field of tunnel engineering equipment, discloses an ultra-large-diameter shield prefabricating and assembling starting guide table device, and solves the defects that in the prior art, prefabricating cannot be conducted in advance, inclination of a shield tunneling machine is difficult to observe in time, and the shield tunneling machine is difficult and tedious to adjust. According to the ultra-large-diameter shield prefabricating and assembling starting guide table device, adsorption magnets are arranged on the two sides of guide table mechanisms, telescopic rods are connected to the centers of the adsorption magnets, auxiliary guide tables are arranged on the other sides of the telescopic rods, air bags are connected to the upper surfaces of the auxiliary guide tables, and air cylinder mechanisms are further arranged between the guide table mechanisms; pressure detection units are arranged on the two sides of the air bags, the pressure detection units are connected with a control center, the air bags are arranged on the two sides of the auxiliary guide table, when the shield tunneling machine inclines, the pressure of the air bags changes, automatic adjustment is conducted through the air cylinder mechanism, the shield tunneling machine is prevented from inclining, and prefabrication quality is conducted through the guide table mechanism; the working efficiency is improved; and field conditions of different geologies are adapted.

Description

Technical Field

[0001] The present invention relates to the technical field of tunnel engineering equipment, in particular to a prefabricated assembly starting guide platform device for an ultra-large diameter shield machine. Background Art

[0002] In the existing traditional construction of ultra-large diameter shield machines, the starting base used to support the large diameter shield is specifically designed and constructed based on the shield's excavation diameter, weight, and block structure. Most of them are disposable structures and cannot be reused in vertical shafts containing secondary structures such as water collection wells, pump rooms, and evacuation passages. In existing technologies, when the shield machine is started, it is necessary to first erect a steel structure starting bracket or a cast-in-place reinforced concrete base between the starting shaft and the end wall, set the shield machine on the starting bracket, and then install a reaction frame at the rear of the shield machine to start the shield machine; when the shield excavation is completed, the starting bracket is removed. Due to the large size and weight of the large diameter shield machine, ordinary steel brackets cannot meet its stability requirements, which will directly affect the shield machine's excavation posture and thus affect the shield machine's start. If the steel bracket is to meet the large diameter start requirements, the strength requirements for the steel bracket are very high, the cost is high, and the installation is relatively complicated.

[0003] The existing publication number "CN220955622U" discloses an assembled guide platform suitable for launching and receiving ultra-large diameter shield machines, which solves the problems of complex guide platform construction, tight construction period, high lifting risk, low construction efficiency and non-reusability for launching and receiving shield machines of other diameters in traditional ultra-large diameter shield construction. Alternatively, the existing publication number "CN116971789A" discloses a shield launching guide platform and a launching angle adjustment method, in which at least four hydraulic cylinders are symmetrically provided on both sides of the launching guide platform, which can adjust the position of the bottom block of the shield body through lifting and lowering action to make it meet the designed launching position, thereby making the entire shield body meet the designed launching angle requirement, and the hydraulic cylinder occupies a small space, which meets the confined space environment conditions of the launching well, and can effectively solve the problem of position error when the shield body is hoisted into the well in blocks. However, the existing technology still has the following problems:

[0004] With respect to the above and existing related technologies, the inventors believe that the following defects often exist:

[0005] Existing equipment is mostly cast in an integrated manner during use, and cannot be prefabricated in advance or adjusted according to existing conditions. It is also difficult to understand the tilt angle and tilt position when the shield is tilted, which affects the adjustment work. Simply adjusting through the cylinder will cause the cylinder to wear too quickly, increasing the subsequent maintenance cost. Summary of the Invention

[0006] The technical problem to be solved by the present invention is that the existing technology has the disadvantages of being unable to prefabricate in advance, difficult to observe the inclination of the shield machine in time, and difficult and cumbersome to adjust the shield machine. For this reason, we propose an ultra-large diameter shield prefabricated assembly starting guide platform device.

[0007] In order to achieve the above-mentioned purpose, the present application adopts the following technical solution: a prefabricated assembly launching platform device for an ultra-large diameter shield machine includes a base, a magnetic levitation mechanism and a magnetic levitation launcher:

[0008] A guide mechanism is provided on the upper surface of the base, adsorption magnets are provided on both sides of the guide mechanism, a telescopic rod is connected to the center of the adsorption magnet, an auxiliary guide is provided on the other side of the telescopic rod, an airbag is connected to the upper surface of the auxiliary guide, a cylinder mechanism is also provided between the guide mechanisms, pressure detection units are provided on both sides of the airbag, and the pressure detection units are connected to the control center.

[0009] Preferably, the base is an integrated cast-molded structure, with insertion rods reserved above the base, and four insertion rods form a group, and three groups of insertion rods are distributed side by side and equidistantly above the base. The central guide platform and the auxiliary guide platform are fixed by the insertion rods to ensure stability in subsequent use.

[0010] Preferably, the cylinder mechanism includes a support plate, a locking block, a piston rod, a cylinder body and a cylinder placement groove. The cylinder placement grooves are evenly and equidistantly distributed above the base. The cylinder is quickly fixed through the cylinder placement grooves, which facilitates replacement when the cylinder is damaged.

[0011] Preferably, the support plate is symmetrically distributed with snap blocks in the center, the snap blocks and the support plate are in a snap-fit ​​structure, the snap blocks are in a hollow structure, magnets and a soft flow layer are provided at the bottom of the snap blocks, the magnets and the soft flow are in an integrated installation structure, and the snap blocks of the snap-fit ​​structure can be quickly disassembled and replaced, and the soft flow layer covers the top of the support plate to improve its wear resistance.

[0012] Preferably, the connection between the cylinder body and the piston rod is a piston connection, the piston rod and the support plate are installed in an integrated manner, the cylinder body and the cylinder placement groove are in a mutually engaging structure, and the support plate is driven to rise by the piston rod, thereby lifting the shield machine and preventing the shield machine from tilting.

[0013] Preferably, the guide platform mechanism includes a center guide platform, a prefabricated plate, a magnetic flow trough, an alignment plate and a placement block. The center guide platform is evenly and equidistantly distributed above the base. A circular arc groove is opened in the center of the center guide platform. The bottom of the shield machine is supported by the center guide platform to ensure that the shield machine starts working.

[0014] Preferably, a plurality of prefabricated panels are distributed below the center guide platform, insertion slots are provided around the prefabricated panels, and a magnetic flow slot is provided in the center of the prefabricated panels. The height of the center guide platform can be changed through the prefabricated panels to adapt to different geological conditions, and the magnetic flow slot is used for electromagnetic flow buffering to prevent the prefabricated panels from vibrating and falling off.

[0015] Preferably, the placement block and the center guide platform are installed in an integrated manner, and the center point of the placement block and the center point of the alignment plate are above the same horizontal line. A laser instrument is also provided at the center point of the lower surface of the placement block, and the laser instrument is used to illuminate the bottom through the alignment plate to avoid displacement of the prefabricated plate during use.

[0016] Preferably, adsorption magnets are symmetrically distributed on both sides of the telescopic rod, and the adsorption magnets, the central guide platform and the auxiliary guide platform are all magnetic adsorption structures. The auxiliary guide platforms are symmetrically distributed on both sides of the central guide platform, and air bags are evenly and equidistantly distributed above the auxiliary guide platforms. The pipes under the air bags are in a tree-shaped structure. The air bags are used to assist in distributing the pressure of the shield machine and at the same time assist in detecting the pressure at different positions of the shield machine, making it convenient to understand whether the shield machine is tilted.

[0017] Preferably, the control center is connected to a pressure detection unit, a data acquisition module and a data processing module in sequence, and the data processing module is connected to an execution control module and a communication module respectively. The pressure detection unit compares the pressure borne by the airbag, and the data detected by the pressure detection unit is collected and classified through the data acquisition module, and then transmitted to the data processing module. After analysis, if the threshold is exceeded, the signal is transmitted to the execution control module to drive the cylinder body and the magnetic levitation mechanism to be corrected. When the warning threshold is reached, the signal is transmitted to the warning module of the center console for warning through the communication module and the signal receiving module. The above modules are adjusted as a whole by the control center.

[0018] Technical effects and advantages of the present invention:

[0019] In the present invention, an airbag is arranged above the auxiliary guide platform to perform auxiliary support work, and pressure detection modules are arranged on both sides of the airbag. When the shield machine is about to tilt, the pressure applied to the airbags at different positions is different. When the threshold is exceeded, the execution control module controls the piston rod to rise and lift the shield machine. At the same time, a support plate is arranged above the piston rod. The wear of the support plate is slow, which extends the service life of the cylinder and reduces operating costs.

[0020] In the present invention, a prefabricated plate is arranged below the center guide platform, and the prefabricated plate itself is quickly spliced ​​with the center guide platform using the magnet in the center. The height of the center guide platform can be flexibly changed according to the geological conditions. A magnetic flow groove is provided in the center of the prefabricated plate, and electromagnetic flow fluid is used for shock absorption and buffering to prevent the center guide platform from being detached due to vibration during the operation of the shield machine. Secondly, a mounting plate is also provided on the side of the center guide platform. A laser instrument penetrates the alignment plate on one side of the prefabricated plate. When the prefabricated plate is tilted, the laser emitted by the laser instrument is blocked, so that the deflection of the prefabricated plate can be quickly detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The disclosure of the present invention is illustrated with reference to the accompanying drawings. It should be understood that the drawings are for illustrative purposes only and are not intended to limit the scope of protection of the present invention. In the drawings, the same reference numerals are used to refer to the same components:

[0022] Figure 1 It is a schematic diagram of the overall three-dimensional structure of the present invention;

[0023] Figure 2 It is a schematic diagram of the three-dimensional structure of the cylinder mechanism of the present invention;

[0024] Figure 3 It is a schematic diagram of the three-dimensional structure of the center guide platform of the present invention;

[0025] Figure 4 It is a schematic diagram of the three-dimensional structure of the auxiliary guide platform of the present invention;

[0026] Figure 5 This is a schematic diagram of the three-dimensional structure of the prefabricated panel of the present invention;

[0027] Figure 6 For the present invention Figure 1 A in the middle is an enlarged structural diagram;

[0028] Figure 7 Schematic diagram of the control center program of the present invention.

[0029] Legend: 1. Base; 2. Cylinder mechanism; 201. Support plate; 202. Clamping block; 203. Piston rod; 204. Cylinder body; 205. Cylinder placement slot; 3. Guide mechanism; 301. Center guide; 302. Prefabricated plate; 303. Magnetic flow slot; 304. Alignment plate; 305. Placement block; 4. Telescopic rod; 5. Adsorption magnet; 6. Auxiliary guide; 7. Airbag; 8. Magnetic levitation mechanism; 9. Magnetic levitation transmitter; 10. Control center; 11. Pressure detection unit; 12. Data acquisition module; 13. Early warning module; 14. Data processing module; 15. Communication module; 16. Execution control module; 17. Signal receiving module. DETAILED DESCRIPTION

[0030] It is easy to understand that according to the technical solution of the present invention, without changing the essential spirit of the present invention, a person skilled in the art can propose a variety of interchangeable structural modes and implementation modes. Therefore, the following specific embodiments and drawings are only exemplary descriptions of the technical solution of the present invention and should not be regarded as the entire invention or as a limitation or restriction of the technical solution of the present invention.

[0031] Reference Figure 1-Figure 7 As shown, the present invention provides a technical solution: a super-large diameter shield prefabricated assembly starting guide platform device, comprising: a base 1, a magnetic suspension mechanism 8 and a magnetic suspension launcher 9:

[0032] A guide mechanism 3 is provided on the upper surface of the base 1, and adsorption magnets 5 are provided on both sides of the guide mechanism 3. The center of the adsorption magnet 5 is connected to a telescopic rod 4, and an auxiliary guide platform 6 is provided on the other side of the telescopic rod 4. The upper surface of the auxiliary guide platform 6 is connected to an airbag 7. A cylinder mechanism 2 is also provided between the guide mechanisms 3, and pressure detection units 11 are provided on both sides of the airbag 7. The pressure detection unit 11 is connected to the control center 10.

[0033] Reference Figure 1 As shown, in this embodiment: the base 1 is an integrated cast-molded structure, and an insertion rod is reserved above the base 1, and four insertion rods are in a group, and three groups of insertion rods are distributed side by side and equidistantly above the base 1. The central guide platform 301 and the auxiliary guide platform 6 are fixed by the insertion rods to ensure stability in subsequent use.

[0034] Reference Figure 1 and Figure 2 As shown, in this embodiment: the cylinder mechanism 2 includes a support plate 201, a locking block 202, a piston rod 203, a cylinder body 204 and a cylinder placement groove 205, and the cylinder placement grooves 205 are evenly and equidistantly distributed above the base 1. The cylinder placement grooves 205 are used to quickly fix the cylinder body 204, so that the cylinder body 204 can be replaced when it is damaged. The locking blocks 202 are symmetrically distributed around the center of the support plate 201. The locking blocks 202 and the support plate 201 are in a locking structure. The locking blocks 202 are hollow structures. Magnets and soft flow layers are provided at the bottom of the locking blocks 202. The magnets and soft flow layers are in an integrated installation structure. The locking blocks 202 with the locking structure are quickly disassembled and replaced, and the soft flow layer covers the support plate 201 to improve its wear resistance.

[0035] Reference Figure 1 and Figure 2As shown, in this embodiment: the connection between the cylinder body 204 and the piston rod 203 is a piston connection, the piston rod 203 and the support plate 201 are installed in an integrated manner, the cylinder body 204 and the cylinder placement groove 205 are in a mutually engaging structure, and the support plate 201 is driven to rise by the piston rod 203, thereby lifting the shield machine and preventing the shield machine from tilting.

[0036] Reference Figure 1 、 Figure 3 、 Figure 5 and Figure 6 As shown, in this embodiment: the guide platform mechanism 3 includes a central guide platform 301, a prefabricated plate 302, a magnetic flow groove 303, an alignment plate 304 and a placement block 305. The central guide platform 301 is evenly and equidistantly distributed above the base 1. A circular arc groove is provided in the center of the central guide platform 301. The bottom of the shield machine is supported by the central guide platform 301 to ensure that the shield machine starts working. A plurality of prefabricated plates 302 are distributed below the central guide platform 301. Insertion grooves are provided around the prefabricated plates 302. A magnetic flow groove 303 is provided in the center of the prefabricated plates 302. The height of the central guide platform 301 can be changed by the prefabricated plates 302 to adapt to different geological conditions, and the magnetic flow groove 303 is used for electromagnetic flow buffering to prevent the prefabricated plates 302 from vibrating and falling off.

[0037] Reference Figure 1 、 Figure 3 、 Figure 5 and Figure 6 As shown, in this embodiment: the placement block 305 and the center guide platform 301 are installed in an integrated manner, the center point of the placement block 305 and the center point of the alignment plate 304 are above the same horizontal line, and a laser is also provided at the center point of the lower surface of the placement block 305. The laser is used to illuminate the bottom through the alignment plate 304 to avoid displacement of the prefabricated plate 302 during use.

[0038] Reference Figure 1 、 Figure 3 and Figure 4 As shown, in this embodiment: adsorption magnets 5 are symmetrically distributed on both sides of the telescopic rod 4, the adsorption magnets 5 and the central guide platform 301 and the auxiliary guide platform 6 are all magnetic adsorption structures, the auxiliary guide platform 6 is symmetrically distributed on both sides of the central guide platform 301, and air bags 7 are evenly and equidistantly distributed above the auxiliary guide platform 6. The pipelines below the air bags 7 are in a tree-shaped structure. The air bags 7 are used to assist in distributing the pressure of the shield machine and at the same time assist in detecting the pressure at different positions of the shield machine, so as to facilitate understanding whether the shield machine is tilted.

[0039] Reference Figure 7As shown, in this embodiment: the control center 10 is connected to the pressure detection unit 11, the data acquisition module 12 and the data processing module 14 in sequence, and the data processing module 14 is respectively connected to the execution control module 16 and the communication module 15. The pressure detection unit 11 compares the pressure borne by the airbag 7, and the data detected by the pressure detection unit 11 is collected and classified through the data acquisition module 12, and then transmitted to the data processing module 14. After analysis, if it exceeds the threshold, the signal is transmitted to the execution control module 16, driving the cylinder body 204 and the magnetic levitation mechanism 8 to be corrected, and when the warning threshold is reached, the signal is transmitted to the warning module 13 of the central console for warning through the communication module 15 and the signal receiving module 17. The above modules are adjusted as a whole by the control center 10.

[0040] Working principle: First, the base 1 is formed by an integrated casting process. After its internal steel skeleton is precisely arranged, a bearing foundation is formed by pouring concrete. After the casting is completed, the upper surface of the base 1 is equipped with equidistantly distributed insertion rods according to the specifications of 3 groups × 4 roots. These insertion rods serve as positioning anchors for the guide platform mechanism 3 and the auxiliary guide platform 6. The bottom slots of the central guide platform 301 and the auxiliary guide platform 6 are precisely snapped in and fixed to form a rigid support frame to ensure that the guide platform system does not undergo basic displacement under the load of the shield machine. At the same time, the adsorption magnets 5 on both sides of the telescopic rod 4 are adsorbed between the auxiliary guide platform 6 and the central guide platform 301 to assist in support. The cylinder placement grooves 205 are evenly milled on the upper surface of the base 1 in a matrix form. When the cylinder body 204 is hoisted into the groove, it is aligned with the cylinder placement groove 205 to achieve quick snap-in. The piston rod 203 and the support plate 201 are integrated and connected by welding.

[0041] The arc-shaped groove of the center guide platform 301 is milled according to the curvature radius of the bottom of the shield machine, forming a line contact support with the metal shell surface at the bottom of the shield machine. The precast plate 302 is precast with concrete, and the grooves around it are inserted into the tenons reserved at the bottom of the center guide platform 301 and bonded by grouting material. Different precast plates 302 can adjust the vertical height of the center guide platform 301. The magnetic flow groove 303 opened in the center of the precast plate 302 has a built-in magnetorheological fluid. When the vibration of the shield machine is transmitted to the guide platform, the magnetorheological fluid dynamically adjusts the shear modulus under the excitation of the electromagnetic coil. , absorb vibration energy and prevent the prefabricated plate 302 from cracking or falling off due to high-frequency vibration. The placement block 305 and the center guide platform 301 are formed by an integral casting process. The collimated laser emitted by the laser instrument on its lower surface vertically passes through the central through hole of the positioning plate 304 and irradiates the reference target on the surface of the base 1. When the prefabricated plate 302 is offset due to geological settlement or load, the displacement of the laser spot on the target will provide real-time feedback on the offset data. The data is converted into an electrical signal by the laser displacement sensor and transmitted to the control center 10 for offset warning and compensation decision-making.

[0042] The airbags 7 are arranged in a 500mm x 500mm matrix on the upper surface of the auxiliary guide platform 6. The airbags 7 are made of high-strength rubber and pre-filled with nitrogen to form an elastic support layer. The tree-shaped pipeline system at the bottom of the airbags 7 consists of a main pipeline and branch pipelines. The pressure distribution valve is used to control the pressure uniformity of each airbag 7. The pressure detection unit 11 uses a silicon piezoresistive pressure sensor, which is attached to the side wall of the airbag 7 and collects real-time pressure distribution data of the airbag 7 group on one side. When the shield machine tilts, the data acquisition module 12 transmits the analog signal output by the pressure sensor to the data processing module 14.

[0043] When the signal reaches the first-level warning threshold, the data processing module 14 triggers the communication module 15, which transmits the warning instruction to the signal receiving module 17 via the CAN bus. The central console warning module 13 activates the sound and light alarm and pushes the tilt warning information to the construction terminal to remind the staff that the shield machine is tilting.

[0044] When the signal reaches the second-level warning threshold, the execution control module 16 activates the cylinder mechanism 2 and the magnetic levitation mechanism 8 to work together. The displacement sensor built into the piston rod 203 feeds back the current extension amount. The execution control module 16 drives the piston rod 203 to accurately compensate for the extension amount based on the data fed back by the data processing module 14, adjusts the height difference of the support plate 201, and corrects the inclination of the shield machine. The magnetic levitation mechanism 8 emits a uniform strong magnetic field through the magnetic levitation transmitter 9. The magnetic field affects the magnet at the bottom of the locking block 202. The rise of the magnet drives the soft fluid layer to rise, thereby covering the top of the support plate 201. The magnetic adsorption ensures static bonding. Under the vibration load of the shield machine, the soft fluid layer absorbs the impact through elastic deformation, reducing the wear rate of the support plate 201 surface. After stopping work, the magnet and the soft fluid layer are reset under the action of gravity and will not be exposed to the outside world for a long time. When the soft fluid layer is damaged, the locking block 202 can be removed and replaced separately.

[0045] The technical scope of the present invention is not limited to the contents of the above description. Those skilled in the art can make various deformations and modifications to the above embodiments without departing from the technical idea of ​​the present invention, and these deformations and modifications should all fall within the protection scope of the present invention.

Claims

1. A super-large diameter shield prefabricated assembly starting guide device, characterized in that: Including base, magnetic levitation mechanism and magnetic levitation launcher: A guide mechanism is provided on the upper surface of the base, adsorption magnets are provided on both sides of the guide mechanism, a telescopic rod is connected to the center of the adsorption magnet, an auxiliary guide is provided on the other side of the telescopic rod, an airbag is connected to the upper surface of the auxiliary guide, a cylinder mechanism is also provided between the guide mechanisms, pressure detection units are provided on both sides of the airbag, and the pressure detection units are connected to the control center.

2. The super-large diameter shield prefabricated assembly starting guide device according to claim 1, characterized in that: The base is an integrated cast-molded structure, and insertion rods are reserved above the base. Four insertion rods form a group, and three groups of insertion rods are distributed side by side and equidistantly above the base.

3. The ultra-large diameter shield prefabricated assembly starting guide platform device according to claim 1, characterized in that: The cylinder mechanism comprises a support plate, a locking block, a piston rod, a cylinder body and a cylinder placement groove, and the cylinder placement grooves are evenly and equidistantly distributed above the base.

4. The super-large diameter shield prefabricated assembly starting guide platform device according to claim 2, characterized in that: The support plate is centrally symmetrically distributed with snap-fit ​​blocks, which are snap-fit ​​structures with the support plate. The snap-fit ​​blocks are hollow structures, and magnets and soft flow layers are provided at the bottom of the snap-fit ​​blocks. The magnets and soft flow layers are integrated installation structures.

5. The super-large diameter shield prefabricated assembly starting guide platform device according to claim 3, characterized in that: The connection mode between the cylinder body and the piston rod is piston connection, the piston rod and the support plate are installed in an integrated manner, and the cylinder body and the cylinder placement groove are in a mutually engaging structure.

6. The ultra-large diameter shield prefabricated assembly starting guide platform device according to claim 1, characterized in that: The guide platform mechanism includes a central guide platform, a prefabricated plate, a magnetic flow groove, an alignment plate and a placement block. The central guide platform is evenly and equidistantly distributed above the base, and an arc-shaped groove is opened at the center of the central guide platform.

7. The super-large diameter shield prefabricated assembly starting guide device according to claim 6, characterized in that: A plurality of prefabricated plates are distributed below the central guide platform. Insertion slots are arranged around the prefabricated plates, and a magnetic flow slot is opened in the center of the prefabricated plates.

8. The super-large diameter shield prefabricated assembly starting guide platform device according to claim 7, characterized in that: The placement block is integrated with the center guide platform, the center point of the placement block and the center point of the alignment plate are above the same horizontal line, and a laser instrument is also provided at the center point of the lower surface of the placement block.

9. The super-large diameter shield prefabricated assembly starting guide device according to claim 6, characterized in that: Adsorption magnets are symmetrically distributed on both sides of the telescopic rod. The adsorption magnets, the central guide platform and the auxiliary guide platform are all magnetic adsorption structures. The auxiliary guide platforms are symmetrically distributed on both sides of the central guide platform. Airbags are evenly and equidistantly distributed above the auxiliary guide platforms, and the pipes under the airbags are in a tree-shaped structure.

10. The super-large diameter shield prefabricated assembly starting guide platform device according to claim 9, characterized in that: The control center is connected to the pressure detection unit, the data acquisition module and the data processing module in sequence. The data processing module is connected to the execution control module and the communication module respectively. The pressure detection unit compares the pressure borne by the airbag, and the data detected by the pressure detection unit is collected and classified through the data acquisition module, and then transmitted to the data processing module. After analysis, if it exceeds the threshold, the signal is transmitted to the execution control module to drive the cylinder body and the magnetic suspension mechanism to make corrections. When the warning threshold is reached, the signal is transmitted to the warning module of the center console for warning through the communication module and the signal receiving module. The above modules are adjusted as a whole by the control center.

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