Turnover adjustable capsule expansion active deviation rectifying device and method

Abstract

The invention discloses a turnover adjustable capsule body expansion active deviation rectifying device and method, and relates to the technical field of underground engineering, water is adopted as an expansion material of an expansion capsule body, the internal water volume and volume of the expansion capsule body are dynamically adjusted through a water injection system, the expansion capsule body is matched with deformation of a protected object, and the deviation rectifying precision is improved. Water in the expansion bag body is quickly frozen and solidified through the freezing system to form the rigid isolation pile, meanwhile, the freezing system is matched with the heating system for unfreezing, multiple times of reversible expansion adjustment and deviation correction control can be carried out, after construction is completed, the expansion bag body can be unfrozen and pulled out for turnover use, no solid waste is left, and the environmental influence and resource waste are reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of underground engineering, and particularly to the active control technology of capsule expansion. Background Art

[0002] During the construction of the foundation pit or tunnel of a newly built underground project, it will have an impact on the adjacent operating subway, overpass, underground pipeline, and high-speed railway. In order to reduce the impact of deep foundation pit construction on the adjacent foundation pit protection objects, the active control technology of capsule expansion is often used. The active control of capsule expansion is a new method for active deformation control of tunnels and foundation pits. According to the deformation state of the protected object, a certain amount of fluid material is injected into a specially made puncture-proof and high-strength capsule, causing the capsule to expand and deform, extruding the soil body, adjusting the stress field of the surrounding strata, and then controlling the deformation of the protected object. After the slurry in the capsule solidifies, an isolation pile is formed to cut off the stratum deformation and protect the adjacent existing buildings and structures.

[0003] Currently, when the existing active control of deformation is carried out by capsule expansion, the following problems exist:

[0004] 1. The solidification time of the slurry injected into the capsule is generally short while the deformation development time is long. Once the slurry solidifies, the volume of the capsule cannot be changed, and it is impossible to control the volume change of the capsule in real time according to the deformation of the protected object, resulting in low deformation correction accuracy.

[0005] 2. The underground construction period is generally long. After using capsule grouting to control deformation, further engineering construction may cause the deformation of the protected object to increase or decrease, so it is necessary to re-drill holes multiple times to correct and control the deformation, resulting in poor construction convenience, high cost, and large environmental impact.

[0006] 3. After the construction of the adjacent underground project is completed, the cost of removing the isolation pile formed by the capsule is relatively high and it cannot be recycled, resulting in waste of resources. If not treated, it will form a "pile forest" underground, hindering the future reuse of land resources and affecting the development and construction of underground space.

[0007] Therefore, how to achieve multiple reversible expansions of the capsule, improve the correction accuracy, facilitate turnover, and reduce environmental impact has become an urgent problem to be solved in this field. Summary of the Invention

[0008] Aiming at the defects of the prior art, the purpose of the present invention is to provide a reusable and adjustable capsule expansion active correction device and method, which is convenient for adjusting expansion and turnover and improving the correction accuracy.

[0009] To achieve the above purpose, the reusable and adjustable capsule expansion active correction device provided by the present invention includes an expansion capsule for cooperating with the protected object, and also includes a water injection system, a freezing system, a heating system, and a control system integrated inside the expansion capsule.

[0010] A temperature sensor is distributed on the outer side of the expansion bladder to monitor the outer temperature of the expansion bladder in real time. The water injection system is configured to be able to inject water into and pump water out of the expansion bladder, and dynamically adjust the internal water volume and volume of the expansion bladder. The freezing system is configured to be able to freeze and solidify the water inside the expansion bladder and maintain the frozen and solidified state of the expansion bladder. The heating system is configured to be able to thaw the expansion bladder. The control system is configured to be able to correspondingly adjust the working states of the water injection system, the freezing system, and the heating system according to the deformation state of the protected object and the outer temperature.

[0011] Further, the expansion bladder includes a bladder body, and the temperature sensors are evenly distributed on the outer peripheral surface of the bladder body and are evenly distributed along the height direction of the bladder body.

[0012] Further, the water injection system includes a water injection component, a water pumping component, and a water pipe. The two ends of the water pipe respectively pass through the two end faces of the expansion bladder, are hermetically connected to the two end faces of the expansion bladder, and form a closed end at the first end of the water pipe. The second end extends out of the expansion bladder and is respectively connected to the water injection component and the water outlet component.

[0013] Further, the water injection component includes a water injection pump, a water injection pipe, and a first flowmeter provided on the water injection pipe. One end of the water injection pipe is connected to the water injection pump, and the other end is connected to the water pipe.

[0014] Further, the water pumping component includes a water pumping pump, a water pumping pipe, and a second flowmeter provided on the water pumping pipe. One end of the water pumping pipe is connected to the water pumping pump, and the other end is connected to the water pipe.

[0015] Further, the freezing system includes a liquid nitrogen delivery pipe, a freezing pipe, and a liquid nitrogen exhaust pipe. The freezing pipe is distributed inside the expansion bladder and forms a U-shaped loop around the water pipe. The end of the freezing pipe extends out of the expansion bladder and is respectively connected to the liquid nitrogen delivery pipe and the liquid nitrogen exhaust pipe, and is hermetically connected to the end face of the expansion bladder.

[0016] Further, the freezing system further includes a liquid nitrogen storage tank and a liquid nitrogen pump. One end of the liquid nitrogen delivery pipe is connected to the liquid nitrogen storage tank, and the other end is connected to the freezing pipe. The liquid nitrogen pump is provided on the liquid nitrogen delivery pipe.

[0017] Further, the heating device includes an electric heating rod. The electric heating rods are distributed inside the expansion bladder, are arranged between the freezing pipe and the water pipe, and form a U-shaped loop around the water pipe. The electric heating rod extends out of the expansion bladder and is hermetically connected to the end face of the expansion bladder.

[0018] Further, the electric heating rod, the freezing tube and the water pipe are closely distributed.

[0019] To achieve the above object, the present invention provides a turnover adjustable capsule expansion active rectification method, based on the turnover adjustable capsule expansion active rectification device described above. The rectification method includes:

[0020] Laying the capsule, drilling a hole at the construction site and laying the expansion capsule in the hole.

[0021] Expanding the capsule, the water injection system injects water into the interior of the expansion capsule, and the control system controls the working state of the water injection system according to the deformation state of the protected object, dynamically adjusting the internal water volume and volume of the expansion capsule.

[0022] Freezing the capsule, after the deformation of the protected object is stable, the freezing system freezes and solidifies the water in the expansion capsule, and the control system controls the working state of the freezing system according to the outer temperature of the expansion capsule, maintaining the frozen and solidified state of the expansion capsule.

[0023] Adjusting the capsule, when the protected object deforms again, the control system turns off the freezing system according to the deformation state of the protected object and turns on the heating system. The heating system thaws the expansion capsule, and the water injection system dynamically adjusts the internal water volume and volume of the expansion capsule, and expands and freezes the capsule again.

[0024] Thawing and pulling out the capsule, after all external construction is completed, the heating system thaws the expansion capsule, the water injection system pumps out the water in the expansion capsule, and then pulls out the expansion capsule from the hole.

[0025] The turnover adjustable capsule expansion active rectification device and method provided by the present invention use water as the expansion material of the expansion capsule, dynamically adjust the internal water volume and volume of the expansion capsule through the water injection system, adapt to the deformation of the protected object, improve the rectification accuracy, and quickly freeze and solidify the water inside the expansion capsule through the freezing system to form a rigid isolation pile. At the same time, it cooperates with the heating system to thaw, can perform multiple expansion adjustments and rectification controls, and after the construction is completed, the expansion capsule can be thawed and pulled out for turnover use, without solid waste residue, reducing environmental impact and resource waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] The present invention will be further described below in conjunction with the drawings and specific embodiments.

[0027] Figure 1 It is a schematic diagram of the overall structure of the turnover adjustable capsule expansion active rectification device provided by the present invention;

[0028] Figure 2 It is a flowchart of the turnover adjustable capsule expansion active rectification method provided by the present invention.

[0029] Reference Numerals:

[0030] 1. Expansion bladder; 11. Temperature sensor; 12. Bladder body; 121. Bottom end face; 122. Top end face;

[0031] 2. Water injection system; 21. Water pipe; 211. First end; 212. Second end; 213. Water injection hole; 22. Water injection pump; 23. Water injection tube; 24. First flowmeter; 25. Water extraction pipe; 26. Water extraction pump; 27. Second flowmeter;

[0032] 3. Freezing system; 31. Liquid nitrogen delivery pipe; 32. Freezing pipe; 33. Liquid nitrogen exhaust pipe; 34. Liquid nitrogen storage tank; 35. Liquid nitrogen pump;

[0033] 4. Heating system; 41. Electric heating rod. Detailed Embodiment

[0034] In order to make the technical means, creative features, achieved purposes and functions of the present invention easy to understand, the present invention will be further described below with reference to specific drawings.

[0035] Refer to Figure 1 , which shows an example of the reusable and adjustable bladder expansion active deviation correction device provided by the present invention.

[0036] As can be seen from the figure, the reusable and adjustable bladder expansion active deviation correction device of this example mainly includes an expansion bladder 1 for cooperating with the protected object, and also includes a water injection system 2, a freezing system 3, a heating system 4 and a control system integrated inside the expansion bladder 1.

[0037] Temperature sensors 11 are distributed on the outside of the expansion bladder 1 to monitor the outside temperature of the expansion bladder 1 in real time. The water injection system 2 is configured to inject water into and extract water from the expansion bladder 1, and dynamically adjust the internal water volume and volume of the expansion bladder 1. The freezing system 3 is configured to freeze and solidify the water inside the expansion bladder 1 and maintain the frozen and solidified state of the expansion bladder 1. The heating system 4 is configured to thaw the expansion bladder 1. The control system is configured to correspondingly adjust the working states of the water injection system 2, the freezing system 3 and the heating system 4 according to the deformation state and outside temperature of the protected object, so that the expansion bladder 1 can perform multiple expansion adjustments according to the deformation state of the protected object, perform deviation correction control to improve the deviation correction accuracy, and can quickly freeze and solidify to form a rigid isolation pile. After the construction is completed, the expansion bladder 1 is thawed and pulled out for reuse to reduce environmental impact and resource waste.

[0038] Among them, the expansion bladder 1 includes a temperature sensor 11 and a bladder body 12. The bladder body 12 is made of a water-impermeable, puncture-proof, high-strength, non-ductile material, such as being composed of high-molecular-weight polyethylene fibers and a polyurethane coating, so that the bladder body 12 can maintain structural stability in the low-temperature environment of a deep foundation pit, ensuring effective protection of the protected object.

[0039] Combined with Figure 1 , further, the temperature sensors 11 are evenly distributed on the outer peripheral surface of the bladder body 12 and are evenly distributed along the height direction of the bladder body 12 to cover the outside of the bladder body 12, forming a temperature sensing array, which can real-time monitor the temperature outside the bladder body 12 after the bladder body 12 is buried in the deep foundation pit, so that the control system can judge the freezing and solidification state and thawing state of the expansion bladder 1 according to the outside temperature, thereby correspondingly controlling the working states of the freezing system 3 and the heating system 4, ensuring that the expansion bladder 1 can solidify to form a rigid isolation pile, and can be completely thawed for multiple expansion adjustments and extraction, so as to improve the reliability of this rectification device.

[0040] Combined with Figure 1 , correspondingly, the water injection system 2 includes a water injection component, a water pumping component and a water pipe 21. The water injection component, the water pumping component and the water pipe 21 can cooperate with each other to inject water and pump water into the expansion bladder 1, and dynamically adjust the internal water volume of the expansion bladder 1 to adjust the volume of the expansion bladder 1, so that the expansion bladder 1 can adapt to the deformation state of the protected object and improve the deformation rectification accuracy.

[0041] Specifically, the water pipe 21 is distributed in the expansion bladder 1. The first end 211 of the water pipe 21 forms a closed end and passes through the bottom end surface 121 of the expansion bladder 1 and is hermetically connected to the bottom end surface 121. The second end 212 of the water pipe 21 passes through the top end surface 122 of the expansion bladder 1, is hermetically connected to the top end surface 122, and extends out of the top end surface 122 to be respectively connected to the water injection component and the water outlet component. At the same time, a number of water injection holes 213 are evenly distributed on the pipe section of the water pipe 21 located inside the expansion bladder 1.

[0042] In this way, the water in the water pipe 21 can uniformly enter the inside of the expansion bladder 1 through the water injection holes 213. At the same time, the water pipe 21 is hermetically connected to the bottom end surface 121 and the top end surface 122 of the expansion bladder 1 respectively, and the water inside the expansion bladder 1 will not leak from the bottom end surface 121 and the top end surface 122, thus ensuring that the water inside the expansion bladder 1 can expand and adjust the volume of the expansion bladder 1.

[0043] Further, the water injection assembly is distributed on one side of the water pipe 21. The water injection assembly includes a water injection pump 22 and a water injection pipe 23. One end of the water injection pipe 23 is connected to the water injection pump 22, and the other end is connected to the second end 212 of the water pipe 21, so that the water injection pump 22 can draw external water and transport the water through the water injection pipe 23 into the water pipe 21 to expand the expansion bladder 1. At the same time, a first flowmeter 24 is provided on the water injection pipe 23, so that the first flowmeter 24 can monitor the water injection volume of the expansion bladder 1 in real time.

[0044] Correspondingly, the water pumping assembly is distributed on the other side of the water pipe 21. The water pumping assembly includes a water pump 25 and a water pumping pipe 26. One end of the water pumping pipe 25 is connected to the water pump 26, and the other end is connected to the second end 212 of the water pipe 21, so that the water pump 26 can pump out the water inside the expansion bladder 1 through the water pumping pipe 25. At the same time, a second flowmeter 27 is provided on the water pumping pipe 25, so that the second flowmeter 27 can monitor the water pumping volume of the expansion bladder 1 in real time.

[0045] The water injection system 2 thus formed, the water injection assembly, the water pumping assembly and the water pipe 21 form a tee. By the cooperation of the water injection assembly and the water pumping assembly, the water injection volume and the water pumping volume of the expansion bladder 1 can be controlled, so as to dynamically adjust the internal water volume and the volume deformation of the expansion bladder 1, realize the multiple reversible expansions of the expansion bladder 1, and improve the deviation correction accuracy of the expansion bladder 1.

[0046] At the same time, water is used as the expansion material of the expansion bladder 1. Water has a low viscosity and strong fluidity, and can be quickly injected and pumped out, so that the expansion bladder 1 can be accurately and quickly expanded reversibly for multiple times. And water can be quickly solidified into ice under the action of the freezing system 3 to form a rigid isolation pile, and can resume fluidity after being thawed by the heating system 4, which is convenient for the expansion bladder 1 to be expanded again and recycled, thereby improving the reliability of the deviation correction device.

[0047] Combined with Figure 1 , in order to enable the expansion bladder 1 to be quickly frozen and solidified to form a rigid isolation pile to effectively protect the protected object, the freezing system 3 includes a liquid nitrogen delivery pipe 31, a freezing pipe 32 and a liquid nitrogen exhaust pipe 33. The freezing pipe 32 is distributed inside the expansion bladder 1 and forms a U-shaped loop to increase the distribution path of the freezing pipe 32 inside the expansion bladder 1 and improve the freezing and solidification efficiency.

[0048] Preferably, the freezing pipe 32 is arranged closely outside the water pipe 21 to reduce the initial volume of the expansion bladder 1, facilitate the burial of the expansion bladder 1, and enable the expansion bladder 1 to have a larger expansion space.

[0049] Further, the end of the freezing pipe 32 passes through the top surface 122 of the expansion bladder 1 and is hermetically connected to the top surface 122, so that the end of the freezing pipe 32 extends out of the expansion bladder 1 and can be connected to the liquid nitrogen delivery pipe 31 and the liquid nitrogen exhaust pipe 33 respectively distributed on both sides of the freezing pipe 32.

[0050] In addition, the freezing system 3 further includes a liquid nitrogen storage tank 34 and a liquid nitrogen pump 35. One end of the liquid nitrogen delivery pipe 31 is connected to the liquid nitrogen storage tank 34, and the other end is connected to the freezing pipe 32. The liquid nitrogen pump 35 is disposed on the liquid nitrogen delivery pipe 31, so that the liquid nitrogen pump 35 extracts liquid nitrogen from the liquid nitrogen storage tank 34, adjusts the liquid nitrogen flow rate, and delivers the liquid nitrogen to the freezing pipe 32 through the liquid nitrogen delivery pipe 31.

[0051] In this way, the liquid nitrogen directly vaporizes inside the freezing pipe 32, and the refrigeration is achieved by using the latent heat of vaporization and the sensible heat of temperature rise of the liquid nitrogen, freezing the water inside the expansion bladder 1, and quickly freezing the expansion bladder 1 to form a frozen bladder, reaching the frozen and solidified state to form a rigid isolation pile.

[0052] Meanwhile, the liquid nitrogen exhaust pipe 33 is connected to the freezing pipe 32, so that the nitrogen gas generated by the vaporization of the liquid nitrogen inside the freezing pipe 32 can be discharged to the atmosphere through the liquid nitrogen exhaust pipe 33 to balance the pressure inside the freezing pipe 32, ensuring the reliability of this deviation correction device.

[0053] Furthermore, the freezing system 3 can also cooperate with the temperature sensor 11 outside the expansion bladder 1 to ensure the effective freezing and solidification of the expansion bladder 1.

[0054] Specifically, when the liquid nitrogen vaporizes inside the freezing pipe 32 and freezes and solidifies the water inside the expansion bladder 1, the temperature sensor 11 monitors the outside temperature of the expansion bladder 1 in real time. When it monitors that the outside temperature reaches the freezing and solidification temperature, the temperature sensor 11 generates a freezing temperature signal and transmits it to the control system, so that the control system controls the liquid nitrogen pump 35 to adjust the liquid nitrogen flow rate, keeps the outside temperature of the expansion bladder 1 unchanged, and maintains the frozen and solidified state of the expansion bladder 1 to form a stable rigid isolation pile, ensuring the effective protection of the protected object.

[0055] Here, the freezing and solidification temperature is not limited. It is necessary to ensure that when the temperature sensor 11 monitors that the outside temperature reaches the freezing and solidification temperature, the expansion bladder 1 is in the frozen and solidified state.

[0056] As an example, in this embodiment, the freezing and solidification temperature of the expansion bladder 1 is -5°C. When the temperature sensor 11 monitors that the outside temperature is lower than -5°C, it indicates that the freezing and solidification inside the expansion bladder 1 is completed and the expansion bladder 1 has reached the frozen and solidified state.

[0057] The thus constituted freezing system 3 can quickly freeze and solidify the water inside the expansion bladder 1 and maintain the frozen and solidified state of the expansion bladder 1 to form a stable rigid isolation pile.

[0058] When the deformation of the protected object changes again due to the construction of adjacent underground projects, it is necessary to adjust the rigid isolation piles and adjust the expansion deformation of the expansion bladder 1. To improve the deformation correction effect, the correction device further includes a heating system 4. The heating system 4 is configured to thaw the expansion bladder 1 to restore the flexibility of the expansion bladder 1, facilitating the dynamic adjustment of the internal water volume and volume of the expansion bladder 1 by the water injection system 2 to adapt to the deformation state of the protected object and ensure the correction accuracy.

[0059] Combined with Figure 1 , specifically, the heating system 4 includes electric heating rods 41. The electric heating rods 41 are distributed inside the expansion bladder 1 and form a U-shaped distribution to increase the distribution path of the electric heating rods 41 inside the expansion bladder 1 and improve the thawing efficiency.

[0060] Preferably, the electric heating rods 41 are arranged closely outside the water pipe 21. In this way, the electric heating rods 41 and the freezing pipes 32 can be respectively distributed on both sides of the water pipe 21 and closely distributed with the water pipe 21 to reduce the initial volume of the expansion bladder 1, facilitate the burial of the expansion bladder 1, and enable the expansion bladder 1 to have a larger expansion space.

[0061] Furthermore, the electric heating rods 41 pass through and extend out of the expansion bladder 1 and are hermetically connected to the end face of the expansion bladder, so that the ends of the electric heating rods 41 pass through the top face 122 of the expansion bladder 1 to connect to an external power supply and a control system. The control system turns on the electric heating rods 41 for heating, conducts heat exchange with the inside of the expansion bladder 1, quickly thaws the expansion bladder 1, and thus thaws the water inside the expansion bladder 1 to restore the flexibility of the expansion bladder 1, enabling the water injection system 2 to adjust the internal water volume and volume of the expansion bladder 1 to adapt to the deformation state of the protected object and improve the correction effect.

[0062] At the same time, after the construction of the underground project is completed, the electric heating rods 41 thaw the expansion bladder 1, enabling the water injection system 2 to pump out the water inside the expansion bladder 1, facilitating the extraction of the expansion bladder 1 for recycling.

[0063] Furthermore, the heating system 4 can also cooperate with the temperature sensor 11 outside the expansion bladder 1 to ensure the effective thawing of the expansion bladder 1.

[0064] Specifically, while the electric heating rods 41 are heating inside the expansion bladder 1, the temperature sensor 11 real-time monitors the outside temperature of the expansion bladder 1. When the monitored outside temperature reaches the thawing temperature, the temperature sensor 11 generates a thawing temperature signal and transmits it to the control system, causing the control system to turn off the electric heating rods 41 and stop heating the inside of the expansion bladder 1, enabling the water injection system 2 to adjust the internal water path and volume of the expansion bladder 1 without being affected by the heating temperature of the electric heating rods 41.

[0065] Here, there is no limitation on the thawing temperature. It is necessary to ensure that when the temperature sensor 11 monitors that the outside temperature reaches the thawing temperature, the expansion bladder 1 changes from the frozen and solidified state to the thawed state, and the flexibility of the expansion bladder 1 is restored.

[0066] To improve the reliability of this rectification device, the control system is configured to be able to monitor the deformation state of the protected object in real time, receive the temperature signal of the temperature sensor 11, and correspondingly control the working states of the water injection system 2, the freezing system 3, and the heating system 4 to ensure the effective protection of the protected object by the expansion bladder 1 and the rectification accuracy.

[0067] Specifically, the control system is connected to the water injection system 2. According to the deformation state of the protected object, it calculates the internal water volume required by the expansion bladder 1, and turns on the water injection pump 22 to transport water through the water injection pipe 23 to the water pipe 21 to expand the expansion bladder 1. At the same time, the first flowmeter 24 on the water injection assembly transmits the real-time monitored water injection volume to the control system. When the water injection volume exceeds the internal water volume required by the expansion bladder 1, the control system turns on the water extraction pump 26 to extract the excess water inside the expansion bladder 1. The second flowmeter 27 on the water extraction assembly transmits the real-time monitored water extraction volume to the control system, so that the control system dynamically controls the working states of the water injection pump 22 and the water extraction pump 26 to dynamically adjust the water injection volume and water extraction volume of the expansion bladder 1, making the internal water volume and volume of the expansion bladder 1 adapt to the deformation state of the protected object and improving the rectification accuracy.

[0068] Here, the control system monitors the deformation state of the protected object in real time and calculates the internal water volume required by the expansion bladder 1, which is a conventional technical means in the art and will not be elaborated here.

[0069] Furthermore, the control system is connected to the liquid nitrogen pump 35 of the freezing system 3 to turn on the liquid nitrogen pump 35 to transport liquid nitrogen to the expansion bladder 1, quickly freeze and solidify the expansion bladder 1 to form a rigid isolation pile, and receive the freezing temperature signal generated by the temperature sensor 11 to control the liquid nitrogen pump 35 to adjust the liquid nitrogen flow rate to maintain the frozen and solidified state of the expansion bladder 1 to form a stable rigid isolation pile and ensure the effective protection of the protected object.

[0070] Correspondingly, the control system is connected to the electric heating rod 41 of the heating system 4 to turn on the electric heating rod 41 to thaw the expansion bladder 1, and receive the thawing temperature signal generated by the temperature sensor 11 to turn off the electric heating rod 41, which is convenient for the extraction of the expansion bladder 1 or the expansion adjustment of the expansion bladder 1 by the water injection system 2.

[0071] Here, the control system can be composed of an existing PLC control cabinet or a remote controller to quickly control the working states of the water injection system 2, the freezing system 3, and the heating system 4 to ensure the effective protection of the protected object by the expansion bladder 1 and the rectification accuracy.

[0072] Thus, the turnable and adjustable capsule expansion active deviation correction device provided by the present invention is formed.

[0073] The present invention also provides a turnable and adjustable capsule expansion active deviation correction method. Based on the turnable and adjustable capsule expansion active deviation correction device formed by the above solution, combined with Figure 1 and Figure 2 , this deviation correction method includes:

[0074] S1: Bury the capsule. Drill a hole at the construction site and bury the expansion capsule 1 in the hole.

[0075] Specifically, conduct lofting at the construction site. According to the hole position design requirements, determine the ground elevation, drilling position, and depth. Then, use a drilling rig to drill a hole at the drilling position. After drilling to the designed depth, finish drilling and lift the drill. Preferably, use bentonite mud to protect the hole wall to prevent the hole wall from collapsing.

[0076] Next, put the expansion capsule 1 into the hole, make the capsule body 12 at the designed depth, backfill fine sand into the hole, compact the pores between the expansion capsule 1 and the surrounding soil, and let it stand for 2 - 3 days.

[0077] S2: Expand the capsule. The water injection system 2 injects water into the interior of the expansion capsule 1. The control system controls the working state of the water injection system 2 according to the deformation state of the protected object, and dynamically adjusts the internal water volume and volume of the expansion capsule 1.

[0078] The control system calculates the required internal water volume of the expansion capsule 1 according to the deformation state of the protected object, and turns on the water injection pump 22. The water is transported through the water injection pipe 23 to the water pipe 21, and the water in the water pipe 21 uniformly enters the interior of the expansion capsule 1 through the water injection holes 213 to expand the volume of the expansion capsule 1.

[0079] Meanwhile, the first flowmeter 24 on the water injection pipe 23 real - time monitors the water injection volume of the expansion capsule 1 and transmits the water injection volume to the control system. When the water injection volume exceeds the required internal water volume of the expansion capsule 1, the control system turns on the water extraction pump 26. The water extraction pump 26 extracts the excess water inside the expansion capsule 1 through the water extraction pipe 25.

[0080] At this time, the second flowmeter 27 on the water extraction pipe 25 real - time monitors the water extraction volume of the expansion capsule 1 and transmits the water extraction volume to the control system, so that the control system dynamically controls the working states of the water injection pump 22 and the water extraction pump 26 according to the water injection volume and the water extraction volume, and dynamically adjusts the internal water volume of the expansion capsule 1, making the volume of the expansion capsule 1 adapt to the deformation state of the protected object and improving the deviation correction accuracy.

[0081] S3: The capsule freezes. After the deformation state of the protected object stabilizes, the freezing system 3 freezes and solidifies the water in the expanded capsule 1. The control system controls the operating state of the freezing system 3 according to the outer temperature of the expanded capsule 1 to maintain the frozen and solidified state of the expanded capsule 1.

[0082] The control system turns on the liquid nitrogen pump 35 so that the liquid nitrogen pump 35 extracts liquid nitrogen from the liquid nitrogen storage tank 34, adjusts the liquid nitrogen flow rate, and transports the liquid nitrogen to the freezing tube 32 through the liquid nitrogen delivery pipe 31. The liquid nitrogen directly vaporizes in the freezing tube 32, and the refrigeration is achieved by using the latent heat of vaporization and the sensible heat of temperature rise of the liquid nitrogen, freezing and solidifying the water inside the expanded capsule 1, quickly freezing the expanded capsule 1 to form a frozen capsule, reaching the frozen and solidified state, so as to form a rigid isolation pile.

[0083] At the same time, the nitrogen gas generated by the vaporization of the liquid nitrogen in the freezing tube 32 is discharged to the atmosphere through the liquid nitrogen exhaust pipe 33 to balance the pressure inside the freezing tube 32 to ensure the reliability of this rectification device.

[0084] During this process, the temperature sensor 11 monitors the outer temperature of the expanded capsule 1 in real time. When it monitors that the outer temperature reaches the freezing and solidifying temperature, the temperature sensor 11 generates a freezing temperature signal and transmits it to the control system, so that the control system controls the liquid nitrogen pump 35 to adjust the liquid nitrogen flow rate, keeps the outer temperature of the expanded capsule 1 unchanged, and maintains the frozen and solidified state of the expanded capsule 1 to form a stable rigid isolation pile, ensuring the effective protection of the protected object.

[0085] S4: The capsule adjusts. When the protected object deforms again, the control system turns off the freezing system according to the deformation state of the protected object and turns on the heating system 4. The heating system 4 thaws the expanded capsule 1, and the water injection system 3 dynamically adjusts the internal water volume and volume of the expanded capsule 1, and performs capsule expansion and capsule freezing again.

[0086] The control system monitors that the deformation state of the protected object changes, turns on the electric heating rod 41 for heating, performs heat exchange with the inside of the expanded capsule 1, quickly thaws the expanded capsule 1, so that the water inside the expanded capsule 1 thaws and the flexibility of the expanded capsule 1 is restored.

[0087] During this process, the temperature sensor 11 monitors the outer temperature of the expanded capsule 1 in real time. When it monitors that the outer temperature reaches the thawing temperature, the temperature sensor 11 generates a thawing temperature signal and transmits it to the control system, so that the control system turns off the electric heating rod 41 and no longer heats the inside of the expanded capsule 1, so that the water injection system 2 can adjust the internal water path and volume of the expanded capsule 1 without being affected by the heating temperature of the electric heating rod 41.

[0088] At that time, the control system repeats S2, recalculates the amount of water required for the current expansion bladder 1, and dynamically controls the water injection system 2 to adjust the internal water volume and volume of the expansion bladder 1 to adapt to the deformation state of the protected object and improve the deviation correction effect.

[0089] Next, the control system repeats S3 to freeze and solidify the expansion bladder 1 to form a rigid isolation pile to protect the deformed protected object.

[0090] S5: Thaw and extract the bladder. After all external construction is completed, the heating system 4 thaws the expansion bladder 1, the water injection system 2 pumps out the water in the expansion bladder 1, and then the expansion bladder 1 is extracted from the drill hole.

[0091] When the adjacent underground project construction is completed, the control system turns on the electric heating rod 41 for heating to quickly thaw the expansion bladder 1 and restore the flexibility of the expansion bladder 1.

[0092] During this process, the temperature sensor 11 monitors the outer temperature of the expansion bladder 1 in real time. When the monitored outer temperature reaches the thawing temperature, the temperature sensor 11 generates a thawing temperature signal and transmits it to the control system, causing the control system to turn off the electric heating rod 41 and stop heating the inside of the expansion bladder 1.

[0093] Then, the control system turns on the water pump 26, and the water pump 26 pumps out all the water inside the expansion bladder 1 through the water suction pipe 25.

[0094] Finally, the thawed expansion bladder 1 is integrally extracted from the drill hole, can be recycled and used, and fine sand is backfilled into the remaining drill hole to restore the surface environment, without residual solid waste, reducing environmental impact and resource waste.

[0095] The recyclable and adjustable bladder expansion active deviation correction device and method thus constituted use water as the expansion material of the expansion bladder, dynamically adjust the internal water volume and volume of the expansion bladder through the water injection system, adapt to the deformation of the protected object, improve the deviation correction accuracy, and quickly freeze and solidify the water inside the expansion bladder through the freezing system to form a rigid isolation pile. At the same time, it cooperates with the heating system for thawing, can perform multiple expansion adjustments and deviation correction controls. After the construction is completed, the expansion bladder can be thawed and extracted for recycling, reducing environmental impact and resource waste.

[0096] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A turnover adjustable capsule expansion active deviation correction device, comprising an expansion capsule used to cooperate with a protected object, characterized in that, It also includes a water injection system, a freezing system, a heating system and a control system integrated inside the expansion bladder. Temperature sensors are distributed on the outer side of the expansion bladder to monitor the outer temperature of the expansion bladder in real time. The water injection system is configured to inject water into and pump water out of the expansion bladder, and dynamically adjust the internal water volume and volume of the expansion bladder. The freezing system is configured to freeze the water inside the expansion bladder and maintain the frozen state of the expansion bladder. The heating system is configured to thaw the expansion bladder. The control system is configured to correspondingly adjust the working states of the water injection system, the freezing system and the heating system according to the deformation state of the protected object and the outer temperature.

2. The turnover adjustable bladder expansion active deviation rectifying device according to claim 1, characterized in that, The expansion bladder includes a bladder body. The temperature sensors are evenly distributed on the outer peripheral surface of the bladder body and are evenly distributed along the height direction of the bladder body.

3. The turnable and adjustable capsule expansion active deviation correction device according to claim 1, wherein, The water injection system includes a water injection component, a water pumping component and a water pipe. The two ends of the water pipe respectively pass through the two end faces of the expansion bladder, are hermetically connected to the two end faces of the expansion bladder, and form a closed end at the first end of the water pipe. The second end extends out of the expansion bladder and is respectively connected to the water injection component and the water outlet component.

4. The turnover adjustable capsule expansion active deviation correction device according to claim 3, characterized in that, The water injection component includes a water injection pump, a water injection pipe and a first flowmeter arranged on the water injection pipe. One end of the water injection pipe is connected to the water injection pump, and the other end is connected to the water pipe.

5. The turnover adjustable capsule expansion active deviation correction device according to claim 4, wherein, The water pumping component includes a water pumping pump, a water pumping pipe and a second flowmeter arranged on the water pumping pipe. One end of the water pumping pipe is connected to the water pumping pump, and the other end is connected to the water pipe.

6. The turnover adjustable capsule expansion active deviation correction device according to claim 3, characterized in that, The freezing system includes a liquid nitrogen delivery pipe, a freezing pipe and a liquid nitrogen exhaust pipe. The freezing pipe is distributed inside the expansion bladder and forms a U-shaped loop. The ends of the freezing pipe extend out of the expansion bladder and are respectively connected to the liquid nitrogen delivery pipe and the liquid nitrogen exhaust pipe, and are hermetically connected to the end face of the expansion bladder.

7. The turnover adjustable capsule expansion active deviation rectifying device according to claim 6, characterized in that, The freezing system also includes a liquid nitrogen storage tank and a liquid nitrogen pump. One end of the liquid nitrogen delivery pipe is connected to the liquid nitrogen storage tank, and the other end is connected to the freezing pipe. The liquid nitrogen pump is arranged on the liquid nitrogen delivery pipe.

8. The turnover adjustable capsule expansion active deviation correction device according to claim 6, characterized in that The heating device includes electric heating rods. The electric heating rods are distributed inside the expansion bladder and form a U-shaped distribution. The electric heating rods extend out of the expansion bladder and are hermetically connected to the end face of the expansion bladder.

9. The turnover adjustable capsule expansion active deviation correction device according to claim 8, characterized in that The electric heating rods, the freezing pipes and the water pipes are closely distributed.

10. A method for actively correcting deviation during turnover and adjustable expansion of a bladder body, characterized in that, Based on the reusable and adjustable bladder expansion active deviation correction device according to any one of claims 1 to 9, the deviation correction method includes: Installing the bladder, drilling holes in the construction site, and installing the expansion bladder in the drilled holes. Bladder expansion: The water injection system injects water into the expansion bladder. The control system controls the working state of the water injection system according to the deformation state of the protected object, and dynamically adjusts the internal water volume and volume of the expansion bladder. Bladder freezing: After the deformation of the protected object is stable, the freezing system freezes the water in the expansion bladder. The control system controls the working state of the freezing system according to the outer temperature of the expansion bladder, and maintains the frozen state of the expansion bladder. When the capsule body is adjusted and the protected object deforms again, the control system shuts down the freezing system according to the deformation state of the protected object and activates the heating system. The heating system thaws the expanded capsule body, and the water injection system dynamically adjusts the internal water volume and volume of the expanded capsule body, and the capsule body is expanded and frozen again. When the capsule body is thawed and pulled out, after all external construction is completed, the heating system thaws the expanded capsule body, the water injection system pumps out the water in the expanded capsule body, and then the expanded capsule body is pulled out from the borehole.

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