A pipe jacking construction method for an open channel under a highway

Abstract

The present invention belongs to the technical field of pipe jacking construction, and in particular, is a method for pipe jacking construction under an open channel of a highway, comprising: step 1, fabricating a blade foot and a caisson, including the blade foot and the shaft reinforcement, brackets, formwork, and concrete, with the reserved opening temporarily sealed with a brick wall made of Mu20 bricks and M10 cement slurry; and step 2, excavating and sinking the shaft, wherein the caisson concrete can begin to sink when its strength reaches 100% of the design strength. In this method for pipe jacking construction under an open channel of a highway, when a slurry balance pipe jacking machine tilts and a laser receiver fails to receive light, a circumferential dynamic tilt detection mechanism can be controlled to perform a circular motion to detect the tilt direction, thereby controlling a corresponding tilt correction drive mechanism to perform a correction operation, thereby preventing a deviation in the drilling angle that results in a misaligned drilling hole, thereby enhancing construction efficiency and enabling timely real-time monitoring and correction of the cutter head, thereby ensuring the axis, elevation, and line shape of the pipeline to the greatest extent possible.

Description

Technical Field

[0001] The invention relates to the technical field of pipe jacking construction, in particular to a pipe jacking construction method for an open channel under a highway. Background Art

[0002] Pipe jacking is a trenchless construction method, a technique for burying pipes with minimal or no excavation. Pipe jacking involves using the jacking force generated by jacking equipment within a working pit to overcome friction between the pipe and the surrounding soil, pushing the pipe into the soil according to the designed slope, and removing the soil. After one section of pipe is pushed into the soil, the second section is lowered and pushed forward. Using the thrust of the main jacking cylinder and other components such as the pipe and relay rooms, the tool pipe or tunnel boring machine is pushed from the working pit through the soil and hoisted into the receiving pit. The pipeline is then buried between the two pits, following the tool pipe or tunnel boring machine.

[0003] The slurry-water balanced pipe jacking machine uses a water pump to deliver slurry with a certain concentration to the excavation surface, and then adjusts the water inlet pressure through the bypass pressure regulating valve in the well and the speed of the slurry pump to balance the groundwater pressure and the soil pressure of the excavation surface, so that the tunnel boring machine cutter head works under balanced pressure, thereby preventing the instability of the excavation surface from causing ground subsidence and uplift. However, in the actual pipe jacking construction process, due to problems such as the formation conditions, the wear of the machine head cutter head and the technical level of the construction personnel, large deviations often occur, which may even cause the jacking project to fail in severe cases.

[0004] The existing technology adopts frequent measurement and correction: after each jacking operation, the axis and elevation of the tool head are measured. When a deviation is found, the correction personnel are required to report the tool head correction angle, the oil pressure value of the jack in each direction, the deviation of the axis, etc. to the central control room and input them into the microcomputer. The microcomputer will display the correction method and data, and the correction will be carried out accordingly, which results in the inability to monitor the correction in real time. After a period of jacking, manual measurement is required, and the deviation is calculated by transmitting and comparing multiple sets of data before the correction operation is carried out. This leads to low efficiency and slow construction progress. It is impossible to perform correction detection and adjustment while jacking. Therefore, a method for jacking pipes under open channels of highways is needed. Summary of the Invention

[0005] Based on the existing technical problems, the present invention proposes a pipe jacking construction method for an open channel under a highway.

[0006] The present invention proposes a pipe jacking construction method for an open channel under a highway, comprising: step 1, fabricating a blade foot and a caisson, including fabricating the blade foot and the well body steel bars, brackets, formwork, and concrete; and temporarily sealing the reserved opening with a brick wall made of Mu20 bricks and M10 cement slurry;

[0007] Step 2: Excavate and sink the well body. When the concrete strength of the caisson reaches 100% of the design strength, it can start sinking.

[0008] Step 3: Repeat steps 1 and 2 until the caisson is lowered to the designed position, and then carry out the bottom sealing operation, including caisson bottom sealing, bottom plate reinforcement production, bottom plate concrete pouring and concrete curing. The bottom layer of the bottom sealing is backfilled with large stones, the middle layer is a G35 reinforced concrete bottom plate, and the bottom layer is backfilled with C25 plain concrete.

[0009] Step 4: Pipeline drilling and jacking: A slurry-water balanced pipe jacking machine is used for drilling operations. During the drilling operation, a deviation correction mechanism is provided to perform real-time deviation correction operations. During the drilling operation, the pipe jacking and installation operations are performed until the drilling and pipe jacking installation are completed.

[0010] The correction mechanism includes a mounting ring installed near the slurry balance pipe jacking machine and the interior of the relative pipe, and a jacking drive mechanism. An auxiliary mounting concentric mechanism is provided inside the mounting ring, and a circumferential dynamic tilt detection mechanism and a tilt correction drive mechanism are respectively provided on one side of the mounting ring.

[0011] The jacking drive mechanism realizes the jacking and conveying operation of the pipeline;

[0012] The auxiliary installation concentric mechanism realizes the adjustment operation so that the axis of the installation ring and the axis of the pipeline are located at the same axis;

[0013] The circumferential dynamic tilt detection mechanism realizes real-time tilt detection during the drilling operation of the slurry balance pipe jacking machine;

[0014] The tilt correction drive mechanism enables the circumferential dynamic tilt detection mechanism to perform a correction adjustment operation after detecting the tilt;

[0015] Step 5: Exit the hole and check the operation of each link; when the machine head exits the hole, the jacking operation should be cautious, steady and uniform. Immediately after the first section of the pipe exits the hole, start to evenly pressurize the thixotropic mud; within 5m of the pipe section exiting the hole, check and urge the construction personnel to gradually adjust the construction parameters of soil cutting, mud discharge, jacking speed, soil pressure, axis and elevation to normal.

[0016] Preferably, the jacking drive mechanism is installed inside one side of the bottom end of the caisson, and the jacking drive mechanism includes a mounting plate and a guide base plate. The mounting surface of the mounting plate is fixedly mounted to the inner wall of the caisson, the bottom of the guide base plate is fixedly mounted to the inner bottom wall of the caisson, the top arc surface of the guide base plate is slidably plugged into the arc surface of the pipe, and a laser emitter is fixedly mounted on one side surface of the mounting plate.

[0017] Preferably, a hydraulic cylinder is fixedly mounted on one side surface of the mounting plate, and the two hydraulic cylinders are symmetrically arranged with respect to the axis of the pipeline. A connecting plate is fixedly mounted on the top of the guide base plate, and the top of the connecting plate is fixedly mounted to the bottom plate of the arc surface at one end of the hydraulic cylinder. A rubber pad is fixedly mounted on the telescopic end of the hydraulic cylinder, and one side surface of the two rubber pads is in contact with one side of the pipeline.

[0018] Preferably, the auxiliary installation concentric mechanism includes a pressure chamber and a communicating hole opened inside the mounting ring, the inner walls of the multiple pressure chambers are fixedly connected to the two ends of the communicating holes, one side inner wall of the pressure chamber is fixedly connected to a pressurized pipe, a valve is provided on the surface of the pressurized pipe, one end of the pressurized pipe is fixedly connected to the oil outlet end of the oil pump, and a laser receiver is fixedly installed on one side surface of the mounting ring.

[0019] Preferably, a positioning rod is slidably inserted into the inner top wall of the pressure chamber, one end of each of the positioning rods is in contact with the inner wall of the pipe, and multiple pressure chambers are in a circular array, and a spring and a sealing gasket are fixedly installed at the bottom end of the positioning rod, respectively, the surface of the sealing gasket is slidably inserted into the inner wall of the pressure chamber, and one end of the spring is fixedly installed on the inner bottom wall of the pressure chamber.

[0020] Preferably, the circumferential dynamic tilt detection mechanism includes an annular guide rail installed on one side of the mounting ring and an annular bevel gear ring installed on the inner wall of one end of the mounting ring. The inner wall of the annular guide rail is respectively slidably connected with a first arc-shaped slider and a second arc-shaped slider, and the three second arc-shaped sliders are distributed in three equal parts on the annular guide rail.

[0021] Preferably, a driving motor is fixedly mounted on the top of the first arc-shaped slider, and a gear shaft is fixedly mounted on the output shaft of the driving motor through a coupling. A bevel gear is fixedly mounted on one end of the gear shaft, and the tooth groove of the bevel gear meshes with the inner wall of the annular bevel gear ring.

[0022] Preferably, both ends of the top of the first arc-shaped slider are fixedly mounted with a station plate, the top of the second arc-shaped slider is fixedly mounted with a support column, and the tops of the three support columns and the tops of the two station plates are fixedly mounted with annular plates.

[0023] Preferably, a detection tube is fixedly installed on one side of the annular plate, and the four detection tubes are all in a four-divided annular array on the surface of the annular plate. A detection rod is slidably inserted into the inner wall of the detection tube, and one end of the detection rod is hemispherical. The hemispherical arc surfaces of the four detection rods are in contact with one end surface of the mud-water balance pipe jacking machine. A compression spring is movably sleeved on the arc surface of the detection rod, and one end of the compression spring is fixedly installed on the inner wall of the detection tube, and the other end of the compression spring is fixedly installed on the surface of the detection rod. A contact button is fixedly installed on the inner wall of the detection tube, and the trigger end of the contact button is in contact with one end of the detection rod.

[0024] Preferably, the tilt correction drive mechanism includes a telescopic cylinder, and the four telescopic cylinders are distributed in a four-divided circular array on the surface of the annular plate. The mounting surfaces of the four telescopic cylinders are fixedly mounted on one side surface of the annular plate, and the telescopic ends of the four telescopic cylinders pass through and extend to one side of the annular plate, and the telescopic ends of the telescopic cylinders are fixedly mounted with rubber push plates.

[0025] The beneficial effects of the present invention are:

[0026] By installing an auxiliary concentric mechanism, a circumferential dynamic tilt detection mechanism and a tilt correction drive mechanism when the slurry balance pipe jacking machine is drilled, the laser transmitter and the detection rod are used to simultaneously detect the operation during the drilling of the slurry balance pipe jacking machine. When tilt occurs, the laser receiver cannot receive light, and the circumferential dynamic tilt detection mechanism can be controlled to perform circular motion to detect the tilt direction, thereby controlling the corresponding tilt correction drive mechanism to perform a correction operation, thereby avoiding the deviation of the drilling angle and causing the drilling misalignment, thereby enhancing the construction efficiency, and being able to timely monitor and correct the cutter head in real time, to ensure the axis, elevation and line shape of the pipeline to the greatest extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 A schematic diagram of a pipe jacking construction method for an open channel under a highway;

[0028] Figure 2 A three-dimensional diagram of a jacking drive mechanism for a pipe jacking construction method for an open channel under a highway;

[0029] Figure 3 A three-dimensional diagram of the installation ring structure of a pipe jacking construction method for an open channel under a highway;

[0030] Figure 4 A three-dimensional diagram of an auxiliary installation concentric mechanism for a pipe jacking construction method under an open channel of a highway;

[0031] Figure 5 This is an exploded view of a pipe jacking construction method for an open channel under a highway;

[0032] Figure 6 A pipe jacking construction method for an open channel under a highway Figure 3 A magnified view of the structure at center A;

[0033] Figure 7 A pipe jacking construction method for an open channel under a highway Figure 5 A magnified view of the structure at point C in the middle;

[0034] Figure 8 A pipe jacking construction method for an open channel under a highway Figure 5 A magnified view of the structure at point B in the middle;

[0035] Figure 9 A three-dimensional diagram of a circumferential dynamic tilt detection mechanism for a pipe jacking construction method under an open channel of a highway.

[0036] In the figure: 1. Mud and water balanced pipe jacking machine; 2. Mounting ring; 3. Jacking drive mechanism; 31. Mounting plate; 32. Guide base plate; 33. Laser transmitter; 34. Hydraulic cylinder; 35. Connecting plate; 36. Rubber pad; 4. Auxiliary installation concentric mechanism; 41. Pressure chamber; 42. Connecting hole; 43. Pressurized pipe; 44. Valve; 45. Laser receiver; 46. Positioning rod; 47. Spring; 48. Sealing pad; 5. Circumferential dynamic tilt detection mechanism; 51. Annular guide rail; 52. Annular bevel gear ring; 53. First arc-shaped slider; 54. Second arc-shaped slider; 55. Driving motor; 56. Gear shaft; 57. Bevel gear; 58. Station plate; 59. Support column; 510. Annular plate; 511. Detection tube; 512. Detection rod; 513. Compression spring; 514. Contact button; 6. Tilt correction drive mechanism; 61. Telescopic cylinder; 62. Rubber push plate. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0038] Reference Figures 1-9 A method for constructing a pipe jacking system under an open channel of a highway includes: step one, making a blade foot and a caisson, including making the blade foot and the well body steel bars, brackets, formwork and concrete; and temporarily sealing the reserved opening with a brick wall made of Mu20 bricks and M10 cement slurry.

[0039] Step 2: Excavate and sink the well body. When the concrete strength of the caisson reaches 100% of the design strength, it can start sinking.

[0040] Step 3. Repeat steps 1 and 2 until the caisson descends to the designed position and performs bottom sealing operations, including caisson bottom sealing, bottom plate reinforcement production, bottom plate concrete pouring and concrete curing. The bottom layer of the bottom sealing is backfilled with large stones, the middle layer is made of G35 reinforced concrete bottom plate, and the bottom layer is backfilled with C25 plain concrete.

[0041] Step 4: Pipe drilling and jacking. Use the mud-water balanced pipe jacking machine 1 to perform drilling operations. During the drilling operation, the set correction mechanism performs real-time correction operations, and the pipe jacking installation operation is performed while drilling until the drilling and pipe jacking installation are completed.

[0042] The correction mechanism includes a mounting ring 2 installed near the slurry balance pipe jacking machine 1 and the inside of the relative pipeline, and a jacking drive mechanism 3. An auxiliary mounting concentric mechanism 4 is provided inside the mounting ring 2, and a circumferential dynamic tilt detection mechanism 5 and a tilt correction drive mechanism 6 are respectively provided on one side of the mounting ring 2.

[0043] In order to realize the jacking and conveying operation of the pipeline by the jacking drive mechanism 3, the jacking drive mechanism 3 is installed inside the bottom side of the caisson. The jacking drive mechanism 3 includes a mounting plate 31 and a guide base plate 32. The mounting surface of the mounting plate 31 is fixedly mounted on the inner wall of the caisson, the bottom of the guide base plate 32 is fixedly mounted on the inner bottom wall of the caisson, the top arc surface of the guide base plate 32 is slidably plugged into the arc surface of the pipeline, and a laser emitter 33 is fixedly mounted on one side surface of the mounting plate 31.

[0044] Specifically, by setting the guide base plate 32, the automatic positioning center guide effect is facilitated during pipeline transportation, and the laser emitter 33 is set to facilitate the control of the horizontal light emitted by the laser emitter 33 to illuminate one side of the mud-water balance pipe jacking machine 1 for reception, and then the tilt is monitored in real time. When the light is not received, it indicates that tilt has occurred and a correction operation can be performed.

[0045] In order to drive the pipeline transportation operation, a hydraulic cylinder 34 is fixedly installed on the surface of one side of the mounting plate 31. The two hydraulic cylinders 34 are symmetrically arranged with respect to the axis of the pipeline. A connecting plate 35 is fixedly installed on the top of the guide bottom plate 32. The top of the connecting plate 35 is fixedly installed to the bottom plate of the arc surface at one end of the hydraulic cylinder 34. A rubber pad 36 is fixedly installed on the telescopic end of the hydraulic cylinder 34. One side surface of the two rubber pads 36 is in contact with one side of the pipeline.

[0046] Specifically, during the conveying operation, the hydraulic cylinder 34 is used to perform telescopic movement to drive the rubber pad 36 to one side of the pipe placed above the guide base plate 32, and then to perform extension movement to drive the pipe to slide forward, thereby performing the conveying operation.

[0047] In order to assist the installation of the concentric mechanism 4 to achieve the adjustment operation of the axis of the mounting ring 2 and the axis of the pipeline being located at the same axis; the auxiliary installation concentric mechanism 4 includes a pressure chamber 41 and a connecting hole 42 opened inside the mounting ring 2, and the inner walls of multiple pressure chambers 41 are fixedly connected to the two ends of the connecting hole 42. A pressure tube 43 is fixedly connected to the inner wall of one side of the pressure chamber 41, and a valve 44 is provided on the surface of the pressure tube 43. One end of the pressure tube 43 is fixedly connected to the oil outlet end of the oil pump, and a laser receiver 45 is fixedly installed on the surface of one side of the mounting ring 2.

[0048] Specifically, when controlling the installation operation of the mounting ring 2, the oil pump is used to control the internal hydraulic oil to be transported outward, so that the hydraulic oil enters the interior of the pressure chamber 41 through the pressurizing pipe 43 when the valve 44 is opened, and the pressurizing operation is performed. The laser receiver 45 is used to receive the light emitted by the laser transmitter 33, and the concentric connection is always maintained. When tilt occurs and the laser receiver 45 cannot receive the emitted light, the circumferential dynamic tilt detection mechanism 5 can be used to detect the effect of the location where the tilt occurs.

[0049] In order to drive the installation groove for the pressure inside the pressure chamber 41, a positioning rod 46 is slidably inserted into the inner top wall of the pressure chamber 41, and one end of multiple positioning rods 46 is in contact with the inner wall of the pipe, and multiple pressure chambers 41 are in a ring array. The bottom ends of the positioning rods 46 are respectively fixed with springs 47 and sealing gaskets 48. The surface of the sealing gasket 48 is slidably inserted into the inner wall of the pressure chamber 41, and one end of the spring 47 is fixedly installed with the inner bottom wall of the pressure chamber 41.

[0050] Specifically, when the pressure inside the pressure chamber 41 increases, the internal positioning rod 46 is squeezed to extend outward, and the sealing gasket 48 is used to perform a sealing operation. When multiple positioning rods 46 extend outward at the same time to squeeze the inner wall of the pipe, the axis of the mounting ring 2 and the axis of the pipe are controlled to be on the same axis.

[0051] In order to enable the circumferential dynamic tilt detection mechanism 5 to detect the tilt operation in real time during the drilling operation of the slurry balance pipe jacking machine 1, the circumferential dynamic tilt detection mechanism 5 includes an annular guide rail 51 installed on one side of the mounting ring 2 and an annular bevel gear ring 52 installed on the inner wall of one end of the mounting ring 2. The inner wall of the annular guide rail 51 is respectively slidably connected with a first arc-shaped slider 53 and a second arc-shaped slider 54, and the three second arc-shaped sliders 54 are arranged in three equal parts on the annular guide rail 51.

[0052] Specifically, when performing circular motion detection, a first arc-shaped slider 53 and multiple second arc-shaped sliders 54 are all slid on the inner wall of the annular guide rail 51 to achieve the effect of circular motion auxiliary detection equipment performing circular motion detection.

[0053] In order to drive the circular motion, a driving motor 55 is fixedly installed on the top of the first arc-shaped slider 53, and the output shaft of the driving motor 55 is fixedly installed with a gear shaft 56 through a coupling. A bevel gear 57 is fixedly installed at one end of the gear shaft 56, and the tooth groove of the bevel gear 57 is engaged with the inner wall of the annular bevel gear ring 52.

[0054] Specifically, the gear shaft 56 is driven to rotate by the driving motor 55 , thereby controlling the rotation of the bevel gear 57 . Under the meshing condition, the bevel gear 57 performs a circular motion on the surface of the annular bevel gear ring 52 .

[0055] Both ends of the top of the first arc-shaped slider 53 are fixedly installed with a station plate 58, the top of the second arc-shaped slider 54 is fixedly installed with a support column 59, and the tops of the three support columns 59 and the tops of the two station plates 58 are fixedly installed with an annular plate 510.

[0056] Specifically, when the bevel gear 57 moves in a circular motion on the surface of the annular bevel gear ring 52 , the annular plate 510 is driven to move in a circular motion, and is supported and installed by the support column 59 and the stand plate 58 .

[0057] A detection tube 511 is fixedly installed on one side of the annular plate 510, and the four detection tubes 511 are all divided into four annular arrays on the surface of the annular plate 510. A detection rod 512 is slidably inserted into the inner wall of the detection tube 511. One end of the detection rod 512 is hemispherical, and the hemispherical arc surfaces of the four detection rods 512 are in contact with one end surface of the mud-water balance pipe jacking machine 1. A compression spring 513 is movably sleeved on the arc surface of the detection rod 512. One end of the compression spring 513 is fixedly installed on the inner wall of the detection tube 511, and the other end of the compression spring 513 is fixedly installed on the surface of the detection rod 512. A contact button 514 is fixedly installed on the inner wall of the detection tube 511, and the trigger end of the contact button 514 is in contact with one end of the detection rod 512.

[0058] Specifically, when performing annular detection, the detection tube 511 on the surface is driven to rotate when the annular plate 510 makes a circular motion, thereby controlling one end of multiple detection rods 512 to contact the relative surface of the slurry balance pipe jacking machine 1, so that they squeeze the contact button 514 for real-time detection. When the drilling hole of the slurry balance pipe jacking machine 1 is tilted, it will cause the surface of one of the detection rods 512 to leave the relative surface of the slurry balance pipe jacking machine 1, and then under the condition of the compression spring 513, it will no longer contact the button 514 and leave, thereby detecting the effect of the tilt of the slurry balance pipe jacking machine 1 at this time.

[0059] In order to enable the tilt correction drive mechanism 6 to realize the circumferential dynamic tilt detection mechanism 5 to detect the tilt and then perform the correction adjustment operation; the tilt correction drive mechanism 6 includes a telescopic cylinder 61, and the four telescopic cylinders 61 are distributed in a four-equally divided circular array on the surface of the annular plate 510, and the mounting surfaces of the four telescopic cylinders 61 are fixedly mounted on one side surface of the annular plate 510, and the telescopic ends of the four telescopic cylinders 61 pass through and extend to one side of the annular plate 510, and the telescopic ends of the telescopic cylinders 61 are fixedly mounted with a rubber push plate 62.

[0060] Specifically, when the slurry balance pipe jacking machine 1 is detected to be tilted, the telescopic cylinder 61 provided at the opposite end of the tilt detection rod 512 is extended to drive the rubber push plate 62 to move forward to squeeze the relative surface of the slurry balance pipe jacking machine 1, thereby performing the effect of adjusting and correcting the deviation.

[0061] Step 5: Exit the hole and check the operation of each link; when the machine head exits the hole, the jacking operation should be cautious, steady and uniform. Immediately after the first section of the pipe exits the hole, start to evenly pressurize the thixotropic mud; within 5m of the pipe section exiting the hole, check and urge the construction personnel to gradually adjust the construction parameters of soil cutting, mud discharge, jacking speed, soil pressure, axis and elevation to normal.

[0062] By setting the auxiliary installation concentric mechanism 4, the circumferential dynamic tilt detection mechanism 5 and the tilt correction drive mechanism 6 when the slurry balance pipe jacking machine 1 is drilled, the laser emitter 33 and the detection rod 512 are used to simultaneously detect the operation during the drilling of the slurry balance pipe jacking machine 1. When tilt occurs, the laser receiver 45 cannot receive light, and the circumferential dynamic tilt detection mechanism 5 can be controlled to perform circular motion to detect the tilt direction, thereby controlling the corresponding tilt correction drive mechanism 6 to perform a correction operation, thereby avoiding the deviation of the drilling angle and causing the drilling misalignment, thereby enhancing the construction efficiency, and being able to timely monitor and correct the cutter head in real time, to ensure the axis, elevation and line shape of the pipeline to the greatest extent.

[0063] Working principle: During construction, the hydraulic cylinder 34 is controlled by the jacking drive mechanism 3 to make the rubber pad 36 push the pipe forward to dock and move, following the slurry balance pipe jacking machine 1 to assist in drilling. When the slurry balance pipe jacking machine 1 tilts in the drilling hole, the laser receiver 45 cannot receive light, and the tilt is judged to control the circumferential dynamic tilt detection mechanism 5 to work.

[0064] During the operation of the circular dynamic tilt detection mechanism 5, the gear shaft 56 is driven to rotate by the driving motor 55, thereby controlling the rotation of the bevel gear 57. Under meshing, the bevel gear 57 is controlled to move in a circular motion on the surface of the annular bevel gear ring 52, thereby controlling the rotation of the annular plate 510, driving the multiple detection rods 512 on the surface to move in a circular motion, so that the hemispherical surface of the detection rod 512 slides on the surface of one end of the slurry balance pipe jacking machine 1. Because the drilling hole of the slurry balance pipe jacking machine 1 is tilted, and the hemispherical surface of a certain detection rod 512 in the circular motion leaves the surface of the slurry balance pipe jacking machine 1, it is no longer squeezed to contact the button 514, thereby judging that this position and the corresponding position are tilted, the tilt correction drive mechanism 6 can be controlled to work and correct the deviation.

[0065] During the deviation correction, the telescopic cylinder 61 corresponding to the deviation correction position is extended to push the inclined surface of the mud-water balanced pipe jacking machine 1 to perform the deviation correction operation.

[0066] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A pipe jacking construction method for an open channel under a highway, comprising: Step 1: Fabricate the blade foot and caisson, including the blade foot and shaft reinforcement, brackets, formwork, and concrete. The reserved opening is temporarily sealed with a brick wall made of Mu20 bricks and M10 cement mortar. Step 2: Excavate and sink the well body. When the concrete strength of the caisson reaches 100% of the design strength, it can start sinking. Step 3: Repeat steps 1 and 2 until the caisson is lowered to the designed position, and then carry out the bottom sealing operation, including caisson bottom sealing, bottom plate reinforcement production, bottom plate concrete pouring and concrete curing. The bottom layer of the bottom sealing is backfilled with large stones, the middle layer is a G35 reinforced concrete bottom plate, and the bottom layer is backfilled with C25 plain concrete. Step 4: Pipe drilling and jacking: a slurry-water balanced pipe jacking machine (1) is used to perform drilling operations, and a deviation correction mechanism is provided to perform real-time deviation correction operations while drilling, and the pipe jacking and installation operations are performed while drilling, until the drilling and the pipe jacking and installation are completed; The deviation correction mechanism comprises a mounting ring (2) installed near the slurry-water balanced pipe jacking machine (1) and inside the relative pipe, and a jacking drive mechanism (3); an auxiliary mounting concentric mechanism (4) is provided inside the mounting ring (2); and a circumferential dynamic tilt detection mechanism (5) and a tilt correction drive mechanism (6) are respectively provided on one side of the mounting ring (2); The jacking drive mechanism (3) realizes the pipeline jacking and conveying operation; The auxiliary installation concentric mechanism (4) realizes the adjustment operation of the axis of the installation ring (2) and the axis of the pipeline being located at the same axis; The circumferential dynamic tilt detection mechanism (5) realizes real-time detection of tilt operation during drilling operation of the mud-water balanced pipe jacking machine (1), and the circumferential dynamic tilt detection mechanism (5) comprises an annular guide rail (51) mounted on one side of the mounting ring (2) and an annular bevel gear ring (52) mounted on the inner wall of one end of the mounting ring (2), the inner wall of the annular guide rail (51) is respectively slidably connected with a first arc-shaped slider (53) and a second arc-shaped slider (54), and the three second arc-shaped sliders (54) are arranged in three equal parts on the annular guide rail (51); Both ends of the top of the first arc-shaped slider (53) are fixedly mounted with a station plate (58), the top of the second arc-shaped slider (54) is fixedly mounted with a support column (59), and the tops of the three support columns (59) and the tops of the two station plates (58) are fixedly mounted with an annular plate (510); A detection tube (511) is fixedly installed on one side of the annular plate (510), and the four detection tubes (511) are all arranged in a four-equal-divided annular array on the surface of the annular plate (510). A detection rod (512) is slidably inserted into the inner wall of the detection tube (511), and one end of the detection rod (512) is in a hemispherical shape. The hemispherical arc surfaces of the four detection rods (512) are in contact with the surface of one end of the mud-water balancing pipe jacking machine (1). A compression spring (513) is movably sleeved on the arc surface of the detection rod (512), and one end of the compression spring (513) is fixedly installed on the inner wall of the detection tube (511), and the other end of the compression spring (513) is fixedly installed on the surface of the detection rod (512). A contact button (514) is fixedly installed on the inner wall of the detection tube (511), and the trigger end of the contact button (514) is in contact with one end of the detection rod (512); The tilt correction drive mechanism (6) enables the circumferential dynamic tilt detection mechanism (5) to perform a correction adjustment operation after detecting the tilt; Step 5: Exit the hole and check the operation of each link; when the machine head exits the hole, the jacking operation should be cautious, steady and uniform. Immediately after the first section of the pipe exits the hole, start to evenly pressurize the thixotropic mud; within 5m of the pipe section exiting the hole, check and urge the construction personnel to gradually adjust the construction parameters of soil cutting, mud discharge, jacking speed, soil pressure, axis and elevation to normal.

2. The pipe jacking construction method for an open channel under a highway according to claim 1, characterized in that: The jacking drive mechanism (3) is installed inside one side of the bottom end of the caisson, and the jacking drive mechanism (3) includes a mounting plate (31) and a guide base plate (32). The mounting surface of the mounting plate (31) is fixedly mounted on the inner wall of the caisson, the bottom of the guide base plate (32) is fixedly mounted on the inner bottom wall of the caisson, the top arc surface of the guide base plate (32) is slidably plugged into the arc surface of the pipeline, and a laser emitter (33) is fixedly mounted on one side surface of the mounting plate (31).

3. The pipe jacking construction method for an open channel under a highway according to claim 2, characterized in that: A hydraulic cylinder (34) is fixedly mounted on one side surface of the mounting plate (31), and the two hydraulic cylinders (34) are symmetrically arranged with respect to the axis of the pipeline. A connecting plate (35) is fixedly mounted on the top of the guide bottom plate (32), and the top of the connecting plate (35) is fixedly mounted on the bottom plate of the circular arc surface at one end of the hydraulic cylinder (34). A rubber pad (36) is fixedly mounted on the telescopic end of the hydraulic cylinder (34), and one side surface of the two rubber pads (36) is in contact with one side of the pipeline.

4. The pipe jacking construction method for an open channel under a highway according to claim 2, characterized in that: The auxiliary installation concentric mechanism (4) includes a pressure chamber (41) and a communication hole (42) opened inside the installation ring (2), the inner walls of the plurality of pressure chambers (41) are fixedly connected to the two ends of the communication hole (42), a pressure tube (43) is fixedly connected to the inner wall of one side of the pressure chamber (41), a valve (44) is provided on the surface of the pressure tube (43), one end of the pressure tube (43) is fixedly connected to the oil outlet end of the oil pump, and a laser receiver (45) is fixedly installed on the surface of one side of the installation ring (2).

5. The pipe jacking construction method for an open channel under a highway according to claim 4, characterized in that: A positioning rod (46) is slidably inserted into the inner top wall of the pressure chamber (41), one end of each of the positioning rods (46) is in contact with the inner wall of the pipe, and the multiple pressure chambers (41) are in a ring array, and a spring (47) and a sealing gasket (48) are fixedly installed at the bottom end of each of the positioning rods (46), the surface of the sealing gasket (48) is slidably inserted into the inner wall of the pressure chamber (41), and one end of the spring (47) is fixedly installed with the inner bottom wall of the pressure chamber (41).

6. The pipe jacking construction method for an open channel under a highway according to claim 1, characterized in that: A driving motor (55) is fixedly mounted on the top of the first arc-shaped slider (53); an output shaft of the driving motor (55) is fixedly mounted on a gear shaft (56) via a coupling; a bevel gear (57) is fixedly mounted on one end of the gear shaft (56); a tooth groove of the bevel gear (57) meshes with the inner wall of the annular bevel gear ring (52).

7. The pipe jacking construction method for an open channel under a highway according to claim 1, characterized in that: The tilt correction drive mechanism (6) comprises a telescopic cylinder (61), wherein four telescopic cylinders (61) are distributed in a four-equally divided annular array on the surface of the annular plate (510), the mounting surfaces of the four telescopic cylinders (61) are fixedly mounted on a side surface of the annular plate (510), and the telescopic ends of the four telescopic cylinders (61) penetrate and extend to one side of the annular plate (510), and a rubber push plate (62) is fixedly mounted on the telescopic end of the telescopic cylinder (61).

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