Pipe jacking supporting mechanism and method suitable for collapsible loess environment

Abstract

The invention relates to the technical field of pipe supporting, in particular to a pipe jacking supporting mechanism and method suitable for a collapsible loess environment, and a translation sliding seat contained in the pipe jacking supporting mechanism can move up and down and move in the left-right direction and can carry an arc-surface supporting arm arranged at the front end of the translation sliding seat to synchronously move. When the translation sliding base moves, a shaft rod part arranged at the upper end of the translation sliding base can make contact with the outer wall of the jacking pipe, a first sensor body is promoted to generate a sensing signal, the cambered surface supporting arm is controlled to move, and the cambered surface supporting arm is adjusted to adjust the end of the jacking pipe to reach the expected supporting state position; and one jacking pipe fixedly placed in the cambered surface notch of the translation sliding seat and the other jacking pipe of which the end part is supported in the cambered surface support arm can be quickly promoted to finish a centering operation process, so that the jacking pipe and the other jacking pipe can be quickly connected. The centering operation condition of the central axis of the jacking pipe can be improved, the efficiency of jacking pipe centering construction can be further improved, and the consistency of jacking pipe butt joint quality is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of pipe support, and in particular relates to a pipe jacking support mechanism and method suitable for collapsible loess environment. Background Art

[0002] In the laying of underground pipelines, the traditional open-cut method not only requires a large amount of excavation and backfill, but also the pipelines are mostly laid along the road network, which will not only block traffic and put pressure on the already heavy-duty traffic, but also involve demolition work, resulting in delayed construction and increased costs. As a dark excavation method, the pipe jacking method has many cross-section types and pipe sections can be prefabricated, which can greatly improve construction efficiency. It also has little impact on ground traffic during construction, can reduce demolition and earthwork excavation, and has little impact on the surrounding environment. It is the preferred construction method for underground pipelines. Collapsible loess mainly refers to soil that is prone to significant deformation after being flooded under the action of the soil layer's own weight and some additional stresses, and its soil structure is destroyed. It is a special soil, and some miscellaneous fill soils are also collapsible. When not immersed in water, collapsible loess has high strength and low compressibility. However, when affected by water, the soil structure will be quickly destroyed and cause significant subsidence. If the joint of the jacking pipe is poorly sealed, it is easy for leakage to occur into the pipe cavity of the jacking pipe, causing significant subsidence of the outer periphery of the jacking pipe, which will cause serious damage to the connection condition of the jacking pipe.

[0003] The existing jacking construction technology for collapsible loess pipe jacking adopts the jacking construction methods, mainly including hand-dug jacking construction, earth pressure balance jacking construction, air pressure balance jacking construction, etc. According to relevant regulations, in unstable soil layers such as collapsible loess, a pipe jacking machine with a balancing function should be selected to ensure the centering between the axis lines of the two connected pipe sections, to promote high-quality sealing connection between the opposite ends of the two connected pipe sections / jacking pipes, and to effectively inhibit the leakage of collapsible loess at the periphery of the pipe docking position into the pipe. However, the existing jacking support mechanism can only adjust the position of the jacking pipe in multiple different directions in space, and the centering between the opposite ends of the jacking pipe is mainly judged by workers' observation. The operating workers judge the centering state between the two connected jacking pipes by observation, and command and adjust the jacking support mechanism to make corresponding response actions to gradually adjust and improve the centering state between the two jacking pipes. This operation method will restrict the further improvement of the efficiency of jacking construction and the relatively poor consistency of the docking quality of the jacking pipes. Summary of the invention

[0004] To solve the above problems, the present invention provides a jacking pipe support mechanism and method suitable for collapsible loess environment, which can establish a relative support state that meets the expected requirements at the end of the jacking pipe, help improve the centering process of the central axis between the jacking pipes, further improve the jacking pipe construction efficiency, and better ensure the consistency of the jacking pipe docking quality.

[0005] The technical solution adopted by the present invention to solve its technical problems is: a jacking pipe support mechanism suitable for collapsible loess environment, including a frame, a feed slide matched with the frame and capable of moving in the front-rear direction relative to the frame, a lifting seat matched with the feed slide and capable of lifting and lowering relative to the feed slide, a translation slide matched with the lifting seat and capable of moving in the left-right direction relative to the lifting seat in a plane, an arc-surface support arm fixed on the front end surface of the translation slide, a pair of assembly frames fixed on the upper end surface of the translation slide, shaft rod parts respectively matched with the two assembly frames, and four sensor assemblies respectively matched with the two shaft rod parts. A walking wheel system composed of tires can be set on the frame, and a track wheel walking system matched with the track of the construction site can also be set, so that the entire support mechanism can move along the track of the construction site.

[0006] An arcuate recess is formed on the upper part of the translation slide, and a plurality of light cylindrical ridges are distributed on the circumference of the arcuate recess, so that the cylindrical top lines of the light cylindrical ridges can be distributed on the same circumferential surface along the front-rear direction of the axis, and the diameter of the circumferential surface is consistent with the outer diameter of the top pipe.

[0007] Ear plates are formed at the left and right ends of the upper part of the arc-surface support arm, and the height position of the upper end surface of the ear plate is not lower than the height position of the upper end surface of the translation slide. A concave boss is formed at the bottom of the concave arc surface of the arc-surface support arm. The upper end surface of the concave boss is formed as a concave cylindrical surface, so that the concave cylindrical surface is coplanar with the circumferential surface.

[0008] After the arc-surface support arm and the translation slide are fixedly connected to form a rigid whole, the arc-surface support arm extends a certain length forward relative to the front end surface of the translation slide, and the concave cylindrical surface on the concave boss can be distributed in the extension direction of the circular surface where the cylindrical top line of the optical cylindrical ridge is located, even if the concave cylindrical surface and the top lines of multiple optical cylindrical ridges are distributed on the same circular surface, in other words, the concave cylindrical surface and the circular surface are coplanar / co-cylindrical.

[0009] The two assembly frames are fixed on the upper end surfaces of the two ear plates respectively. The assembly frame includes a frame body, and a pair of guide arms 1 and a pair of guide arms 2 formed on the frame body and extending toward the notch side of the arc surface support arm. The two guide arms 1 and the two guide arms 2 are both arranged in a front-to-back relative state, and the two guide arms 1 are located between the two guide arms 2. A slide groove extending in the left-right direction is formed on the guide arm 1 and the guide arm 2. The two pairs of guide arms 1 on the two assembly frames can be arranged opposite to each other left and right, and similarly, the two pairs of guide arms 2 on the two assembly frames can also be arranged opposite to each other left and right. Both the guide arm 1 and the guide arm 2 extend toward the notch side of the arc surface notch.

[0010] At least two roller surface segments are formed on the shaft portion, and light column segments are formed at the outer ends of the two roller surface segments located at the two end sides respectively along the axial direction of the shaft portion. Prism segments are matched on the free end faces of the two light column segments, so that the shaft portion can rotate around its axis relative to the prism segment. The outer diameter of the roller surface segment is larger than the outer diameter of the light column segment, and the outer diameter of the light column segment is not less than the maximum outer diameter on the prism segment. The two light column segments are matched with the slide grooves formed on the two guide arms one respectively, and a line-to-surface contact matching relationship is established between the light column segment and the slide groove. The two prism segments are matched with the slide grooves formed on the two guide arms two respectively, and a surface-to-surface contact matching relationship is established between the prism segment and the slide groove. The outer peripheral surface of the roller surface segment extends outward at least relative to the free end end contour of the guide arm one. Preferably, the outer circumference of the roller surface segment extends outward relative to the free end contour of the second guide arm, so that the outer circumference of the roller surface segment can smoothly contact the outer circumference of the top pipe, and at the same time can effectively avoid the free end of the first guide arm and the free end of the second guide arm from contacting the outer circumference of the top pipe.

[0011] A transmission shaft is formed on a section of the column extending out of the matching slide groove on the two prism segments, and the axial extension direction of the transmission shaft is consistent with the extension direction of the slide groove provided on the second guide arm and is relatively perpendicular to the axial direction of the prism segment. Corresponding to the above solution, the axial extension direction of the transmission shaft is left and right.

[0012] The four sensor assemblies are allocated in pairs as a group and are respectively configured at the two ends of the two shaft parts. Specifically, the four sensor assemblies are all fixed on the frame body of the assembly frame and are respectively matched with the transmission shafts arranged at the ends of the two shaft parts. The sensor assembly 1 includes a first sensor body and a thrust part.

[0013] The free end of the transmission shaft is matched with the first sensor body, so that when the prism segment moves left and right relative to the slide slot and carries the transmission shaft to move synchronously, the first sensor body can generate a sensing signal. The body of the transmission shaft is matched with the thrust part, so that the elastic thrust of the thrust part on the transmission shaft can push the prism segment to the side of the frame body away from the assembly frame.

[0014] Optionally, the thrust portion includes a tube body and a thrust spring. The transmission shaft includes a guide section, at least one intermediate section and a contact, the outer diameter of which decreases successively. The contact matches the first sensor body and can cause the first sensor body to generate a sensing signal. The axial direction of the tube body is distributed along the left and right directions. The tube body and the frame body of the assembly frame are matched through a threaded structure, so that the tube body can move relative to the frame body in the left and right directions. A countersunk portion is formed at one end of the tube body facing the prismatic section, and a radial convex body is formed at the port of the countersunk portion. A countersunk hole is formed at the other end of the tube body, and the sensing signal generating end of the first sensor body extends into the countersunk hole.

[0015] The thrust spring is sleeved on the middle section of the transmission shaft and its two ends are in contact with the end surface of the guide section and the inner bottom surface of the countersunk hole portion respectively. The radial convex body at the end of the countersunk hole portion is in contact with the free end side of the outer peripheral surface of the guide section, and can guide the guide section to move towards and away from the inner bottom surface of the countersunk hole portion along a straight line.

[0016] Optionally, the countersunk hole at the other end of the tube body is a threaded countersunk hole, and the first sensor body is matched with the threaded countersunk hole, and the sensing signal generating end of the first sensor body is directed toward the inner bottom end side of the threaded countersunk hole. In this way, the left and right position of the first sensor body relative to the inner bottom surface of the threaded countersunk hole can be adjusted to achieve the adjustment of the initial matching state of the contact and the first sensor body.

[0017] Optionally, the first sensor body can be a grating sensor body or a capacitive sensor body. The first sensor body can also be other forms of sensors. For example, when a grating sensor is selected, the grating sensor body is fixed on the frame body of the assembly frame, and the dynamic grating is fixed on the free end of the transmission shaft, that is, the contact. When the prism segment or the transmission shaft moves relative to the second slide slot, the dynamic grating can change its position relative to the fixed grating on the grating sensor body, and generate corresponding sensor signal changes, thereby being able to determine the displacement of the shaft portion to the left or to the right, and used to analyze and determine the real-time spatial position of the translation slide and the arc support arm, so that the control unit / controller can control the translation slide to make a corresponding response action. Similarly, when a capacitive sensor is selected, the capacitive sensor body is fixed on the frame body, and the long strip carrying the dielectric is fixed on the contact. When the prism segment moves, the position of the long strip carrying the dielectric energy changes relative to the capacitive sensor body, so that the length of the long strip extending into the capacitive sensor body changes, causing the sensor signal to change.

[0018] Optionally, a second sensor assembly is also included. Left and right vertical arms are formed opposite to each other at the bottom of the curved support arm, and a groove body is formed at the lower end of the vertical arm. A thrust bolt is matched on the groove body. The concave boss is matched with the two vertical arms through a slide rail structure extending in the vertical direction, and the concave boss can move downward relative to the curved support arm, that is, in the initial state, the concave boss is relatively located at the uppermost position in the vertical stroke direction. The second sensor assembly includes a second sensor body and an elastic arch plate.

[0019] The two ends of the elastic arch plate extend into the two groove bodies respectively, and are matched with the groove bodies through the slideway structure extending in the left and right directions. The arched top surface of the elastic arch plate contacts the lower end surface of the concave boss. Screwing the thrust bolt can push the end of the elastic arch plate to move in the left and right directions relative to the groove body, and the arching degree of the elastic arch plate can be adjusted to achieve the adjustment of the upward elastic thrust of the elastic arch plate acting on the concave boss.

[0020] The second sensor body is fixed below the elastic arch plate, and the sensing generating part of the second sensor body is fixed on the concave lower end surface of the elastic arch plate and connected to the second sensor body.

[0021] Optionally, the second sensor body is a strain type sensor body, and the sensing part is a strain gauge part.

[0022] Optionally, the lower end surface of the concave boss is formed as an inner concave arc surface. The size of the contact surface between the arched top surface of the elastic arch plate and the inner concave arc surface can change accordingly with the change of the curvature of the elastic arch plate.

[0023] The present invention relates to a pipe jacking support method based on the pipe jacking support mechanism suitable for collapsible loess environment, comprising the following steps: (I) fixing at least one jacking tube to be plugged in the arcuate recess of the translation slide, so that the outer peripheral surface of the jacking tube is kept in tangential contact with the ridges of the light column; (II) Adjusting the spatial position of the translation slide so that the arc-surface support arm corresponds to the lower side of the jacking pipe buried in the soil layer; (III) driving the translation slide to slowly rise and move, during which the real-time displacement of the corresponding shaft portion in the left and right directions is calculated according to the sensor signals fed back by each first sensor body, so as to continuously adjust the left and right positions of the translation slide; (IV) determining whether the real-time displacements of the two shaft parts fall within a set threshold range, and controlling the translation slide to respond according to the determination result; i) If the real-time displacements of the two shaft parts fall within the set threshold range at the same time, the adjustment of the spatial position of the translation slide is terminated; ii) If the real-time displacements of the two shaft parts are such that only one falls within the set threshold range, or both do not fall within the set threshold range, then return to the above step (III).

[0024] The present invention also relates to a pipe jacking support method based on the pipe jacking support mechanism containing the second sensor assembly and suitable for collapsible loess environment, comprising the following steps: (I) fixing at least one jacking tube to be plugged in the arcuate recess of the translation slide, so that the outer peripheral surface of the jacking tube is kept in tangential contact with the ridges of the light column; (II) Adjusting the spatial position of the translation slide so that the arc-surface support arm corresponds to the lower side of the jacking pipe buried in the soil layer; (III) driving the translation slide to slowly rise and move, during which the real-time displacement of the corresponding shaft portion in the left and right directions is calculated according to the sensor signals fed back by each first sensor body, so as to continuously adjust the left and right positions of the translation slide; at the same time, according to the sensor signals fed back by the second sensor body, the downward movement stroke of the concave boss is calculated to adjust and control the lifting and lowering action of the translation slide; (IV) Determine whether the real-time displacement of the two shaft parts falls within the set threshold range, and control the translation slide to make a response action of left and right movement based on the judgment result; and determine whether the real-time downward movement stroke of the concave boss falls within the set warning threshold range to adjust the translation slide to make a response action of lifting and lowering movement.

[0025] i) If the real-time displacements of the two shaft parts fall within the set threshold range at the same time, the adjustment of the spatial position of the translation slide is terminated; ii) If the real-time displacements of the two shaft parts are such that only one falls within the set threshold range, or both do not fall within the set threshold range, then return to the above step (III).

[0026] 1) If the downward travel of the concave boss falls within the warning threshold range, the translation slide is controlled to move downward so that the downward travel of the concave boss becomes 0 mm or is controlled within the range of 1 mm; 2) If the downward movement of the concave boss does not fall within the warning threshold range, the translation slide can be controlled to continue to move slowly upward.

[0027] The beneficial effects of the present invention are as follows: the jacking pipe support mechanism and method provided by the present invention, which is suitable for collapsible loess environment, can accurately and quickly adjust the real-time position of the jacking pipe by continuously detecting the positional relationship between the opposite ends of the two jacking pipe sections during the jacking pipe docking process, and the control unit adjusts the support mechanism to make a response action, so as to quickly align the jacking pipe located on the support mechanism with the opposite end of the jacking pipe inserted in the soil layer, and realize the connection. The present invention helps to achieve the technical purpose of further improving the efficiency of jacking pipe construction and better ensuring the consistency of the quality of jacking pipe docking. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural schematic diagram of the present invention.

[0029] Figure 2 for Figure 1 Schematic diagram of the enlarged structure at point A in the middle.

[0030] Figure 3 for Figure 1 Schematic diagram of the enlarged structure at point B in the middle.

[0031] Figure 4 A schematic diagram of the partial cross-sectional structure of the assembly frame.

[0032] Figure 5 It is a schematic diagram of the state of the assembly frame and the shaft rod.

[0033] Figure 6 The figure is a schematic diagram of the split structure of the sensor assembly 1 matching the shaft rod part.

[0034] Figure 7 It is a structural schematic diagram of the shaft portion.

[0035] Figure 8 It is a structural schematic diagram of the translation slide.

[0036] Fig. 9 It is a structural schematic diagram of the curved support arm.

[0037] Fig.10 It is a structural schematic diagram of the cooperation between the translation slide and the curved support arm.

[0038] Fig.11 It is a schematic diagram for demonstrating the actions of the present invention in pipe jacking construction operation.

[0039] Fig.12 It is a schematic diagram of the structure of the optimization scheme of the present invention.

[0040] Fig.13 for Fig.12 Schematic diagram of the enlarged structure at point C in the middle.

[0041] In the figure: 10 frame, 11 walking wheel assembly, 12 leg cylinder assembly; 20 feed slide, 21 lifting cylinder assembly; 30 lifting seat; 40 translation slide, 41 arc surface notch, 42 smooth cylindrical ridge, 421 center ridge, 422 circumferential surface, 43 support arm; 50 arc surface support arm, 51 ear plate, 52 concave boss, 521 inner concave cylindrical surface, 522 inner concave arc surface, 53 vertical arm, 54 type trough, 541 thrust bolt; 60 assembly frame, 61 guide arm 1, 611 slide groove 1, 62 guide arm 2, 621 slide groove 2, 622 boss, 63 stepped through hole; 70 shaft rod, 7 1 roller surface section, 72 light column section, 73 prism section, 731 transmission shaft, 732 guide section, 733 middle section one, 734 middle section two, 735 contact; 80 sensor assembly one, 81 first sensor body, 811 cylinder portion, 82 tube body, 821 radial convex body, 822 countersunk hole portion, 823 threaded countersunk hole, 824 external thread surface one, 825 external thread surface two, 83 thrust spring, 84 end cap, 841 axial flange; 90 sensor assembly two, 91 second sensor body, 911 strain gauge portion, 92 elastic arch plate, 921 end block; 100 jacking pipe, 101 reference jacking pipe. DETAILED DESCRIPTION

[0042] The structures, proportions, sizes, etc. illustrated in the drawings of the specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical contents disclosed by the present invention. At the same time, the terms such as "upper", "lower", "front", "back", "middle" and so on quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical contents.

[0043] like Figures 1 to 10The illustrated embodiment shows a pipe jacking support mechanism suitable for collapsible loess environment, comprising a frame 10, a feed slide 20 matched with the frame 10 and movable relative to the frame 10 along the axial direction of the pipe jacking 100 (in the figure, the front-rear direction perpendicular to the drawing), a lifting seat 30 matched with the feed slide 20 and movable relative to the feed slide 20, a translation slide 40 matched with the lifting seat 30 and movable relative to the lifting seat 30 in a plane along a direction perpendicular to the axis of the pipe jacking 100 (in the figure, the left-right direction), a curved support arm 50 fixed on one side end face (in the figure, the front end face), a pair of assembly frames 60 fixed on the upper end face of the translation slide 40, shaft rod portions 70 respectively matched with the two assembly frames 60, and four sensor assemblies 80 respectively matched with the two shaft rod portions 70.

[0044] A traveling wheel assembly 11 and a leg cylinder assembly 12 are provided on the vehicle frame 10. The traveling wheel assembly 11 can carry the vehicle frame 10 to move the jacking tube support mechanism. The leg cylinder assembly 12 can stably fix the jacking tube support mechanism at a certain position. A screw transmission unit is provided on the vehicle frame 10 to drive the feed slide 20 to make reciprocating linear movements relative to the vehicle frame 10. A lifting cylinder assembly 21 is provided on the feed slide 20, and the cylinder rod end of the lifting cylinder assembly 21 is connected to the lifting seat 30, so that the lifting seat 30 can move up and down relative to the feed slide 20 with the cylinder rod of the lifting cylinder assembly 21. A plurality of column rods are provided between the lifting seat 30 and the feed slide 20 to guide the lifting seat 30 to move up and down smoothly. The lifting cylinder assembly 21 can be a hydraulic cylinder or a screw cylinder. A screw transmission unit is provided on the upper part of the lifting seat 30 to drive the translation slide 40 to reciprocate along the left and right direction relative to the lifting seat 30. It should be noted that since the technical content involved in this paragraph belongs to the scope of the prior art, it will not be repeated.

[0045] like Figure 1 , Figure 8 , Fig.10 As shown, an arcuate recess 41 is formed on the upper portion of the translation slide 40, and a plurality of light cylindrical ridges 42 are distributed on the circumferential surface of the arcuate recess 41, and the cylindrical top lines of the light cylindrical ridges 42 can be distributed on the same circular surface 422, and the diameter of the circular surface 422 is consistent with the outer diameter of the top pipe 100.

[0046] The arc surface recess 41 can be set as a semi-cylindrical groove or an incomplete cylindrical groove with an extended circumferential angle less than 180 degrees. The light cylindrical ridges 42 distributed on the inner bottom surface of the arc surface recess 41 can be distributed alternately along the circumferential direction, or can be distributed continuously along the circumferential direction. Fig.10, one of the multiple light cylindrical ridges 42 that is in the center (i.e., the center ridge 421 in the figure) can correspond to the lowest point of the arc surface recess 41, so that the cylindrical top line of the center ridge 421 is distributed correspondingly at the lowest point of the circular surface 422, and can coincide with the lowest point of the concave cylindrical surface 521 on the same straight line extending parallel to the axial direction of the circular surface 422.

[0047] like Figure 1 , Figures 9 and 10 As shown, ear plates 51 are formed at the left and right ends of the upper part of the arc support arm 50, and the height position of the upper end surface of the ear plate 51 is not lower than the height position of the upper end surface of the translation slide 40. A concave boss 52 is formed at the bottom of the concave arc surface of the arc support arm 50, and the upper end surface of the concave boss 52 is formed as a concave cylindrical surface 521. After the arc support arm 50 and the translation slide 40 are fixedly connected to form a rigid whole, the arc support arm 50 is extended outward (i.e. forward) by a certain length in the axial direction (i.e. the front-to-back direction) relative to the front end surface of the translation slide 40, and the concave cylindrical surface 521 on the concave boss 52 is distributed in the extension direction of the circumferential surface 422 where the cylindrical top line of the light cylindrical ridge 42 is located, that is, the concave cylindrical surface 521 and the cylindrical top lines of multiple light cylindrical ridges 42 are distributed on the same circumferential surface 422.

[0048] The concave boss 52 protrudes radially relative to the concave upper end surface of the arc support arm 50, and the concave cylindrical surface 521 protrudes radially relative to the concave upper end surface of the arc support arm 50, as shown in FIG. Fig. 9 In this way, during the operation, the outer peripheral surface of the top pipe 100 will not easily come into contact with the concave upper end surface of the arc-surface support arm 50.

[0049] like Figures 1 to 5 As shown, two assembly frames 60 are respectively fixed on the upper end surfaces of the two ear plates 51. The assembly frame 60 includes a frame body, and a pair of guide arms 1 61 and a pair of guide arms 2 62 formed on the frame body and extending (extending to the left and right) toward the groove side of the arc support arm 50. The two guide arms 1 61 and the two guide arms 2 62 are arranged in a front-to-back relative distribution, and the two guide arms 1 61 are located between the two guide arms 2 62. A slide groove 1 611 extending in the left-right direction is formed on the guide arm 1 61, and a slide groove 2 621 extending in the left-right direction is formed on the guide arm 2 62.

[0050] like Figures 1 to 3 , Figures 5 to 7 As shown, the shaft portion 70 is formed with more than two roller surface segments 71, and at both ends ( Figure 7The outer ends (left and right ends) of the two roller surface segments 71 (left and right ends in the figure) are respectively formed with light column segments 72, and the free ends of the two light column segments 72 are inserted with prism segments 73, so that the shaft portion 70 is coaxial with the prism segment 73 and the shaft portion 70 can rotate around the axis of the shaft portion 70 relative to the prism segment 73. The outer diameter of the roller surface segment 71 is larger than the outer diameter of the light column segment 72, and the outer diameter of the light column segment 72 is larger than the maximum outer diameter of the prism segment 73.

[0051] The two light column segments 72 are matched with the two first slide grooves 611 respectively, and a line-surface contact matching relationship is established between the light column segments 72 and the first slide grooves 611. The two prism segments 73 are matched with the two second slide grooves 621 respectively, and a surface-surface contact matching relationship is established between the prism segments 73 and the second slide grooves 621. In this way, the shaft portion 70 can rotate relative to the assembly frame 60, and can move linearly along the second slide grooves 621 relative to the assembly frame 60.

[0052] The outer circumference of the roller surface segment 71 extends outward relative to the free end contour of the guide arm 1 61 and the free end contour of the guide arm 2 62, that is, the radial dimension of the roller surface segment 71 is significantly larger than the maximum radial dimension of the free end contour of the guide arm 1 61 and the maximum radial dimension of the free end contour of the guide arm 2 62, see Figure 2 , Figure 3 , Figure 5 and Fig.12 As shown, when in use, the outer circumference of the roller surface segment 71 can smoothly contact the outer circumference of the top pipe 100, and at the same time, the free end of the guide arm 1 61 and the free end of the guide arm 2 62 can be effectively prevented from contacting the outer circumference of the top pipe 100. A thin elastic layer (with a radial thickness of less than 2 mm, preferably less than 1 mm) can be fixedly provided on the outer circumference of the roller surface segment 71.

[0053] A transmission shaft 731 is formed on a section of the column on the two prismatic segments 73 that extends out of the matching slide groove 2 621, and the axial extension direction of the transmission shaft 731 is consistent with the extension direction of the slide groove 2 621, and is relatively perpendicular to the axial direction of the prismatic segment 73 or the shaft portion 70.

[0054] The four sensor assemblies 80 are allocated in pairs as a group and are respectively configured at the two ends of the two shaft parts 70. Specifically, the four sensor assemblies 80 are respectively fixed on the frame bodies of the two assembly frames 60, and are respectively matched with the transmission shafts 731 provided at the ends of the two shaft parts 70. The sensor assembly 80 includes a first sensor body 81 and a thrust part.

[0055] The free ends of the four transmission shafts 731 are matched with the four first sensor bodies 81 respectively, so that when the prism segment 73 moves relative to the second slide slot 621 and carries the transmission shaft 731 to move, the first sensor body 81 can generate a sensing signal. The bodies of the four transmission shafts 731 are matched with four thrust parts respectively, so that the elastic thrust of the thrust parts acting on the matching transmission shafts 731 can push the prism segment 73 to the side of the frame body away from the assembly frame 60.

[0056] In the initial state, under the elastic thrust of the thrust part, the prism section 73 is pushed toward the closed end of the second slide groove 621 and contacts the boss 622 provided at the closed end. When the roller surface section 71 of the shaft portion 70 contacts the outer peripheral surface of the top pipe 100 and receives the force from the top pipe 100, while driving the shaft portion 70 to rotate, it also drives the shaft portion 70 or the prism section 73 to move relative to the second slide groove 621. When the reaction force generated to resist the elastic thrust of the thrust part increases to a certain extent, the prism section 73 will move relative to the second slide groove 621 toward the side of the frame body of the assembly frame 60, so that the free end of the transmission shaft 731 moves / moves, causing the first sensor body 81 to generate a changed sensing signal.

[0057] like Figure 3 , Figures 5 to 7 As shown, the thrust part includes a tube body 82 and a thrust spring 83. The transmission shaft 731 includes a guide section 732, a middle section 1 733, a middle section 2 734 and a contact 735, the outer diameters of which decrease in sequence.

[0058] The axial direction of the tube body 82 is arranged along the left-right direction. The tube body 82 is matched with the frame body of the assembly frame 60 through a threaded structure, so that the tube body 82 can move along the left-right direction relative to the frame body of the assembly frame 60, and adjust the position of the tube body 82 relative to the frame body. In the figure, a stepped through hole 63 is formed on the frame body, and an internal thread surface is formed on the inner end side of the cavity of the stepped through hole 63, which matches the external thread surface 1 824 formed in the middle of the tube body 82, so that the tube body 82 is fixedly assembled on the frame body, so that the left-right position of the end of the tube body 82 extending to one side of the guide arm 2 62 (i.e., one end facing the prism section 73) can be adjusted.

[0059] A counterbore portion 822 is formed at one end of the tube body 82 facing the prism section 73, and a radial protrusion 821 is formed at the end of the counterbore portion 822. A threaded counterbore 823 is formed at the other end of the tube body 82, and the sensing signal generating end of the first sensor body 81 extends into the threaded counterbore 823. The contact 735 can extend into the inner bottom of the threaded counterbore 823 and match with the sensing signal generating end of the first sensor body 81.

[0060] The middle section 2 734 carries the contact 735 through the axial through hole connecting the countersunk portion 822 and the threaded countersunk hole 823, so that the contact 735 extends into the threaded countersunk hole 823 and matches with the first sensor body 81, so that the contact 735 can cause the first sensor body 81 to generate a sensing signal.

[0061] The first sensor body 81 is matched with the threaded counterbore 823 through a threaded structure. A barrel portion 811 may be formed at the exposed end of the first sensor body 81. An external threaded surface 825 may be provided at the outer end of the tube body 82, and an end cap 84 may be matched on the external threaded surface 825. An axial flange 841 is formed on the inner bottom surface of the end cap 84. After the end cap 84 is fixed to the end of the tube body 82, the barrel portion 811 can be plugged into the axial flange 841, so that the end cap 84 can support one end of the barrel portion 811 of the first sensor body 81, so that the first sensor body 81 is stably and reliably kept in a horizontal state.

[0062] The thrust spring 83 is mounted on the two middle sections of the transmission shaft 731, and the two ends are respectively in contact with the end surface of the guide section 732 and the inner bottom surface of the counterbore portion 822. The radial protrusion 821 formed at the end of the counterbore portion 822 is in contact with the area of ​​the outer circumference of the guide section 732 close to the free end side, and can guide the guide section 732 to move in a straight line / in the left and right direction to move closer to and away from the inner bottom surface of the counterbore portion 822, so that the contact 735 can stably cause the first sensor body 81 to generate a sensor signal that changes accordingly.

[0063] like Fig.11As shown, during the operation, a jacking pipe 100 is placed in the arc surface recess 41 of the translation slide 40 (the aforementioned jacking pipe 100 is not shown in the figure), so that the outer peripheral surface of the jacking pipe 100 is tangentially in contact with the light cylindrical ridges 42 distributed on the inner bottom of the arc surface recess 41, and the end of the jacking pipe 100 is pushed toward one end of the arc surface support arm 50. Then, by adjusting the left and right (X direction in the figure) position of the translation slide 40, the reference jacking pipe 101 fixed in the soil layer corresponds to the recess of the arc surface support arm 50 and is relatively above the concave boss 52, so that a certain size of vertical spacing is maintained between the outer peripheral surface of the reference jacking pipe 101 and the inner concave cylindrical surface 521. Then, by adjusting the height position of the translation slide 40 (the position in the Y direction in the figure), the reference jacking pipe 101 is gradually brought close to the inner concave cylindrical surface 521. During this period, if the axial centerline alignment deviation between the jacking pipe 100 and the reference jacking pipe 101 is large, the roller surface segment 71 on the left side or the roller surface segment 71 on the right side in the figure will touch the outer wall of the jacking pipe 100, so that the corresponding shaft portion 70 or the corresponding prism segment 73 moves leftward or rightward, and the sensor signal of the corresponding matching first sensor body 81 changes. The control unit can judge the relative position (i.e., the centering state) between the jacking pipe 100 and the reference jacking pipe 101 according to the sensor signal, and drive the translation slide 40 to make a corresponding response action, so as to quickly and accurately adjust the relative position between the jacking pipe 100 and the reference jacking pipe 101, and finally make the centering state between the jacking pipe 100 and the reference jacking pipe 101 meet the construction requirements. Finally, the jacking pipe 100 can be pushed to move toward the reference jacking pipe 101, so that the jacking pipe 100 and the reference jacking pipe 101 are connected. The so-called reference jacking pipe 101 is the jacking pipe 100 that has been pre-fixed in the soil layer in the early stage, which is relative to the jacking pipe 100 that has not been fixed in the soil layer, that is, it is named based on the fixed state of the jacking pipe 100, rather than another new type of jacking pipe that is created and distinguished based on changes in structure, function, etc. Therefore, the present invention has the advantages of further improving the docking construction efficiency of the jacking pipe 100 and improving the consistency of the docking quality of the jacking pipe 100.

[0064] The first sensor body 81 may be a grating sensor body or a capacitive sensor body.

[0065] like Figures 11 to 13As shown, it also includes a sensor assembly 90. At the same time, vertical arms 53 opposite to each other are formed at the bottom of the arc support arm 50, and a groove body 54 is formed at the lower end of the vertical arm 53. A thrust bolt 541 is matched on the groove body 54, and the screw end of the thrust bolt 541 extends into the cavity / groove of the groove body 54. The concave boss 52 is matched with the two vertical arms 53 through a slide rail structure extending in the vertical direction, and the concave boss 52 can move downward relative to the arc support arm 50, that is, in the initial state, the concave boss 52 is relatively located at the uppermost position on its vertical stroke, so that the inner concave cylindrical surface 521 arranged thereon and the circumferential surface 422 are in a state of co-circular distribution.

[0066] The second sensor assembly 90 includes a second sensor body 91 and an elastic arch plate 92 .

[0067] The second sensor body 91 is fixed on the translation slide 40 and relatively located below the elastic arch plate 92. The sensing portion of the second sensor body 91 is fixed on the concave lower end surface of the elastic arch plate 92, and the sensing portion is connected to the second sensor body 91. In the figure, the second sensor body 91 is a strain sensor body, and correspondingly, the sensing portion is a strain gauge portion 911.

[0068] The two ends of the elastic arch plate 92 are respectively formed with end blocks 921, and the two end blocks 921 are respectively extended into the two groove bodies 54, and are matched with the corresponding matching groove bodies 54 through the slideway structure extending in the left and right directions. The arched top surface of the elastic arch plate 92 contacts and matches with the inner concave arc surface 522 formed on the lower end surface of the concave boss 52.

[0069] Tightening the thrust bolt 541 can push the end of the elastic arch plate 92 to move in the left and right direction relative to the groove body 54, and can adjust the degree of arching of the elastic arch plate 92 (in the initial state), so as to adjust the upward elastic thrust of the elastic arch plate 92 on the concave boss 52, so as to adjust and control the sensing sensitivity of the sensor assembly 2 90. When the concave boss 52 is pressed and moves downward, the elastic arch plate 92 is pressed and elastically deformed, which causes the strain gauge part 911 to elastically deform, thereby causing the sensor signal to change.

[0070] When the lower end surface of the concave boss 52 is formed as an inner concave arc surface 522, in the initial state, it is necessary to avoid too large a contact area between the arched top surface of the elastic arch plate 92 and the inner concave arc surface 522, and generally, 1 / 2 to 2 / 3 of the area of ​​the arched top surface of the elastic arch plate 92 is in contact with the inner concave arc surface 522. In this way, the size of the contact area between the arched top surface of the elastic arch plate 92 and the inner concave arc surface 522 can change significantly with the degree of curvature of the elastic arch plate 92.

[0071] By setting the sensor assembly 2 90, the state between the reference jacking pipe 101 and the curved support arm 50 can be monitored in real time, and the relative position of the reference jacking pipe 101 relative to the jacking pipe 100 in the vertical direction can be analyzed and determined by the control unit, which, on the one hand, helps to improve the degree of centering of the axis between the jacking pipe 100 and the reference jacking pipe 101, and on the other hand, can prevent the curved support arm 50 from excessively moving upward relative to the reference jacking pipe 101, which would adversely affect the fixed state of the reference jacking pipe 101 and / or the horizontal state of the curved support arm 50, especially the position state of the concave cylindrical surface 521 on the curved support arm 50. Figure 1 , Figure 8 , Fig.10 and Fig.12 As shown, a plurality of support arms 43 are distributed on the front end surface of the translation slide 40, so that the support arms 43 are distributed around the circumference and all contact the lower end surface of the arc support arm 50, so as to ensure the stability of the arc support arm 50 in a state of extending forward horizontally. The lower end surface of the arc support arm 50 can also be other cylindrical forms or planes, and is not limited to the arc form shown in the figure.

[0072] The present invention relates to a pipe jacking support method, which comprises the following steps.

[0073] (I) The top pipe 100 to be inserted is fixedly placed in the arcuate recess 41 of the translation slide 40, so that the outer peripheral surface of the top pipe 100 to be inserted is kept in a state of tangential contact with the ridges 42 of the optical column.

[0074] After the jacking pipe 100 is hoisted and placed in the arc surface recess 41 , the jacking pipe 100 is pushed forward by an external hydraulic propulsion device so that the end of the jacking pipe 100 is close to the front side of the arc surface recess 41 and close to the front end surface of the translation slide 40 .

[0075] (II) Adjusting the spatial position of the translation slide 40, that is, adjusting the spatial position of the arcuate support arm 50, so that the arcuate support arm 50 corresponds to the bottom of another jacking pipe 100 buried in the soil layer, and the other jacking pipe 100 buried in the soil layer is the reference jacking pipe 101 mentioned above.

[0076] By adjusting the positions of the feed slide 20, the lifting seat 30 and the translation slide 40, the spatial position of the arc-surface support arm 50 is adjusted, so that the free end of the arc-surface support arm 50 is close to the exposed end of the reference jacking tube 101, and finally the arc-surface support arm 50 is aligned below the exposed end of the reference jacking tube 101, completing the rough alignment adjustment. At this time, both ends of the two shaft parts 70 correspond to the obliquely lower position of the outer peripheral surface of the reference jacking tube 101.

[0077] (III) Continue to drive the translation slide 40 to slowly move upward, and the control unit calculates the real-time displacement of the corresponding shaft portion 70 in the left-right direction according to the sensor signal fed back by the first sensor body 81, and the control unit analyzes and calculates the displacement direction and displacement of the translation slide 40 that should make a corresponding response action according to the size and direction of the displacement, and adjusts the left-right position of the translation slide 40 or the arc support arm 50 accordingly to perform precise alignment adjustment; During the slow ascent of the translation slide 40, the roller surface segment 71 of the shaft portion 70 relatively located on the left or right side will contact the outer peripheral wall of the reference jacking tube 101. As the translation slide 40 continues to rise, the reference jacking tube 101 will exert a force on the roller surface segment 71. This force can cause the shaft portion 70 to rotate around its axial direction and cause the shaft portion 70 to move leftward or rightward, thereby driving the prism segment 73 carrying the transmission shaft 731 to touch the first sensor body 81 to generate a sensor signal. The sensor signal is transmitted to the control unit in real time. After analysis and processing, the control unit issues a response action command to move the translation slide 40 or the arc support arm 50 to the left or right by a certain stroke. At that time, the roller surface segments 71 on the two shaft portions 70 may be in a state of being detached from the outer peripheral wall of the reference jacking tube 101. As the translation slide 40 or the arc surface support arm 50 continues to move upward, the roller surface segment 71 of one or two shaft rod portions 70 will contact the outer peripheral wall of the reference jacking pipe 101 again, and generate a sensor signal again, which will be analyzed and processed by the control unit again and a response action instruction will be issued to adjust the position of the arc surface support arm 50 again, and this cycle will be repeated.

[0078] It should be noted that when the translation slide 40 or the arc-surface supporting arm 50 moves to the left or right, the translation slide 40 or the arc-surface supporting arm 50 can be temporarily stopped from moving upward. After the translation slide 40 or the arc-surface supporting arm 50 stops moving in the left and right directions, the translation slide 40 or the arc-surface supporting arm 50 continues to move upward slowly.

[0079] (IV) During the process of the arc surface supporting arm 50 slowly moving upward and moving left and right, the control unit will determine in real time whether the real-time displacement of the two shaft parts 70 both (i.e., simultaneously) falls within the preset threshold range, and control the translation slide 40 or the arc surface supporting arm 50 to make corresponding response actions according to the judgment result. The preset threshold range can be 0 mm to 10 mm, preferably within the range of 5 mm.

[0080] i) If the real-time displacements of the two shaft parts 70 fall within the set threshold range at the same time, the adjustment of the spatial position of the translation slide 40 or the arc-surface support arm 50 is terminated; ii) If only one of the real-time displacements of the two shaft parts 70 falls within the set threshold range, or both do not fall within the set threshold range, the process returns to the above step (III).

[0081] Another pipe jacking support method according to the present invention is based on a support mechanism containing a sensor assembly 90 and includes the first two steps of the above method, except for the third and fourth steps, which are specifically: The translation slide 40 or the arc-surface support arm 50 is driven to slowly rise and move. During this period, the real-time displacement of the corresponding shaft portion 70 in the left and right directions is calculated respectively according to the sensor signals fed back by each first sensor body 81, and the control unit calculates the displacement size and direction of the response action that the translation slide 40 should make in the left and right directions according to the displacement of the shaft portion 70, and adjusts the left and right position of the translation slide 40 accordingly; at the same time, according to the sensor signals fed back by the second sensor body 91, the control unit calculates the downward movement stroke of the concave boss 52, and adjusts the height position of the translation slide 40 accordingly, so that it can move up and down.

[0082] In the above method, it is also determined whether the downward travel (real-time displacement) of the concave boss 52 falls within a set warning threshold interval, which is not less than 4 mm, preferably not less than 2 mm. The translation slide 40 is controlled to make a corresponding response action according to the determination result.

[0083] 1) If the downward movement amount of the concave boss 52 falls within the warning threshold range, the control unit controls the translation slide 40 to move downward so that the downward movement amount of the concave boss 52 becomes 0 mm or is controlled within the range of 1 mm; For example, when the downward movement amount of the concave boss 52 is greater than or equal to 4 mm, the control unit controls the translation slide 40 to move downward so that the downward movement amount of the concave boss 52 is within the range of 1 mm; for another example, when the downward movement amount of the concave boss 52 is greater than or equal to 2 mm, the control unit controls the translation slide 40 to move downward so that the downward movement amount of the concave boss 52 becomes 0 mm; 2) If the downward movement amount of the concave boss 52 does not fall within the warning threshold range, the control unit controls the translation slide 40 to continue to move upward slowly.

[0084] The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. The present invention can be improved in many aspects without violating the overall concept, and those familiar with the technology can modify or change the above embodiments without violating the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. A pipe jacking support mechanism suitable for collapsible loess environment, comprising a frame (10), a feed slide (20) movable in a front-rear direction relative to the frame (10), a lifting seat (30) movable in a lift relative to the feed slide (20), and a translation slide (40) movable in a left-right direction relative to the lifting seat (30); characterized in that: It also includes an arc-surface support arm (50) fixed on the front end surface of the translation slide (40), a pair of assembly frames (60) fixed on the upper end surface of the translation slide (40), shaft rod portions (70) respectively matched with the two assembly frames (60), and four sensor assemblies (80) matched with the shaft rod portions (70); An arcuate recess (41) is formed on the upper portion of the translation slide seat (40), a plurality of light column ridges (42) are provided on the circumference of the arcuate recess (41), and the top lines of the light column ridges (42) are distributed on the same circumferential surface (422) along the front-rear direction of the axis; The arc-surface supporting arm (50) extends forward relative to the front end surface of the translation slide seat (40); ear plates (51) are respectively formed at the left and right ends of the arc-surface supporting arm (50); a concave boss (52) is formed at the bottom of the concave arc-shaped surface of the arc-surface supporting arm (50); the upper end surface of the concave boss (52) is a concave cylindrical surface (521), and the concave cylindrical surface (521) is coplanar with the circumferential surface (422); The two assembly frames (60) are respectively fixed on the two ear plates (51) and each comprises a frame body, and a pair of guide arms 1 (61) and a pair of guide arms 2 (62) formed on the frame body and extending toward the notch side of the arc-surface support arm (50); a slide groove extending in the left-right direction is formed on the guide arm 1 (61) and the guide arm 2 (62); At least two roller surface sections (71) are formed on the shaft portion (70), and light column sections (72) are respectively formed on the outer ends of the roller surface sections (71) at both end sides, and prism sections (73) are respectively arranged on the two light column sections (72), so that the shaft portion (70) can rotate relative to the prism sections (73); the outer diameter of the roller surface section (71) is not less than the outer diameter of the light column section (72), and the outer diameter of the light column section (72) is greater than the maximum outer diameter of the prism section (73); the light column section (72) matches the slide groove on the first guide arm (61); the prism section (73) corresponds to the slide groove on the second guide arm (62); a transmission shaft (731) is formed on the column of the prism section (73) extending out of the slide groove, and the axial direction of the transmission shaft (731) is consistent with the extension direction of the slide groove provided on the second guide arm (62); The sensor assembly 1 (80) is fixed on the two frame bodies and matches the transmission shaft rods (731) in a one-to-one correspondence; The sensor assembly (80) comprises a first sensor body (81) and a thrust part; the free end of the transmission shaft (731) matches the first sensor body (81), so that when the prism section (73) carries the transmission shaft (731) to move left and right, the first sensor body (81) can be caused to generate a sensing signal; the body of the transmission shaft (731) matches the thrust part, so that the elastic thrust of the thrust part acting on the transmission shaft (731) can push the prism section (73) to the side away from the frame body.

2. The pipe jacking support mechanism suitable for collapsible loess environment according to claim 1 is characterized in that: The thrust portion comprises a tube body (82) and a thrust spring (83); the transmission shaft (731) comprises a guide section (732) whose outer diameters successively decrease, at least one middle section and a contact (735); the contact (735) matches the first sensor body (81); The axial direction of the tube body (82) is arranged in the left-right direction and is fixedly connected to the frame body of the assembly frame (60); a countersunk portion (822) is formed at one end of the tube body (82) facing the prism section (73), and a radial convex body (821) is formed at the port of the countersunk portion (822); a countersunk hole is formed at the other end, and the sensing signal generating end of the first sensor body (81) extends into the inner bottom end side of the countersunk hole; The thrust spring (83) is sleeved on the middle section of the transmission shaft (731) and its two ends are respectively in contact with the end surface of the guide section (732) and the inner bottom surface of the countersunk hole portion (822); the radial convex body (821) is in contact with the outer peripheral surface of the guide section (732).

3. The pipe jacking support mechanism suitable for collapsible loess environment according to claim 2 is characterized in that: The tube body (82) and the frame body are matched via a threaded structure, so that the tube body (82) can move in the left-right direction relative to the frame body.

4. The pipe jacking support mechanism suitable for collapsible loess environment according to claim 3 is characterized in that: The countersunk hole at the other end of the tube body (82) is a threaded countersunk hole (823), and the first sensor body (81) is matched with the threaded countersunk hole (823), and the sensing signal generating end of the first sensor body (81) is directed toward the inner bottom end side of the threaded countersunk hole (823).

5. The pipe jacking support mechanism suitable for collapsible loess environment according to any one of claims 1 to 4, characterized in that: Left and right opposing vertical arms (53) are formed at the bottom of the curved support arm (50), and a groove body (54) is formed at the lower end of the vertical arm (53); a thrust bolt (541) is matched on the groove body (54); the concave boss (52) matches the two vertical arms (53) via a slide rail structure extending in the vertical direction, and the concave boss (52) can move downward relative to the curved support arm (50); It also includes a second sensor assembly (90) including a second sensor body (91) and an elastic arch plate (92); the second sensor body (91) is fixed below the elastic arch plate (92), and the sensing generating portion of the second sensor body (91) is fixed on the lower end surface of the elastic arch plate (92); The two ends of the elastic arch plate (92) extend into the two groove bodies (54) respectively, and are matched with the groove bodies (54) via slideway structures extending in the left-right direction; the arched top surface of the elastic arch plate (92) contacts the lower end surface of the concave boss (52); and the thrust bolt (541) can drive the end of the elastic arch plate (92) to move in the left-right direction relative to the groove body (54), so as to change the arching degree of the elastic arch plate (92).

6. The pipe jacking support mechanism suitable for collapsible loess environment according to claim 5, characterized in that: The second sensor body (91) is a strain-type sensor body, and the sensing generating portion is a strain gauge portion (911).

7. The pipe jacking support mechanism suitable for collapsible loess environment according to claim 5, characterized in that: The lower end surface of the concave boss (52) is formed as an inner concave arc surface (522); the size of the contact surface between the arched top surface of the elastic arch plate (92) and the inner concave arc surface (522) can change with the change of the degree of curvature of the elastic arch plate (92).

8. The pipe jacking support mechanism suitable for collapsible loess environment according to claim 5, characterized in that: The first sensor body (81) is a grating sensor body or a capacitive sensor body.

9. A pipe jacking support method suitable for collapsible loess environment, characterized in that: Using the pipe jacking support mechanism suitable for collapsible loess environment according to any one of claims 1 to 4; comprising the following steps: (I) at least one jacking tube (100) to be plugged is fixedly placed in the arc-surface recess (41) of the translation slide (40), so that the outer peripheral surface of the jacking tube (100) is kept in a state of tangential contact with the ridges (42) of the light column surface; (II) adjusting the spatial position of the translation slide (40) so that the arc-surface support arm (50) corresponds to the lower side of the jacking pipe (100) buried in the soil layer; (III) driving the translation slide (40) to move upward, calculating the real-time displacement of the shaft portion (70) in the left-right direction according to the sensing signal fed back by the first sensor body (81), and adjusting the left-right position of the translation slide (40); (IV) determining whether the real-time displacements of the two shaft rods (70) simultaneously fall within a set threshold range, and controlling the translation slide (40) to respond according to the determination result.

10. A pipe jacking support method suitable for collapsible loess environment, characterized in that: The pipe jacking support mechanism suitable for collapsible loess environment as described in claim 5 comprises the following steps: (I) at least one jacking tube (100) to be plugged is fixedly placed in the arc-surface recess (41) of the translation slide (40), so that the outer peripheral surface of the jacking tube (100) is kept in a state of tangential contact with the ridges (42) of the light column surface; (II) adjusting the spatial position of the translation slide (40) so that the arc-surface support arm (50) corresponds to the lower side of the jacking pipe (100) buried in the soil layer; (III) driving the translation slide (40) to move upward, calculating the real-time displacement of the shaft portion (70) in the left-right direction according to the sensor signal fed back by the first sensor body (81), so as to adjust the left-right position of the translation slide (40); at the same time, calculating the downward travel of the concave boss (52) according to the sensor signal fed back by the second sensor body (91), so as to adjust the lifting and lowering action of the translation slide (40); (IV) determining whether the real-time displacement of the two shaft rods (70) falls within a set threshold value interval, and controlling the translation slide (40) to make a response action of moving left and right according to the determination result; and determining whether the real-time downward displacement of the concave boss (52) falls within a set warning threshold value interval, so as to adjust the translation slide (40) to make a response action of moving up and down.

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