Pipe jacking construction device and construction method

Abstract

The application discloses a pipe jacking construction device, which comprises a plurality of jacking auxiliary mechanisms, one jacking auxiliary mechanism is arranged at each end of each pipe, any two adjacent pipes share one jacking auxiliary mechanism, each jacking auxiliary mechanism comprises two clamping pieces in a half-cylinder structure, the two clamping pieces form a hollow cylinder structure sleeved on the end of the pipe, and the two clamping pieces are detachably connected; each clamping piece comprises two first clamping shells, a second clamping shell and a plurality of telescopic pieces, and the two first clamping shells are connected through the second clamping shell in an arc-shaped corrugated sheet structure and the plurality of telescopic pieces. The jacking auxiliary mechanism is sleeved on the two ends of the pipe, the frictional resistance between the pipe and the surrounding rock of the pipe hole wall in the pipe jacking process is reduced, the pipe jacking operation efficiency is improved, and the abrasion of the pipe wall in the jacking process is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe jacking construction. More particularly, the present application relates to a pipe jacking construction device and a construction method. BACKGROUND

[0002] Pipe jacking construction is a kind of non-excavation pipe construction device, which is to dig a working well and a receiving well at both ends of a pre-buried pipe, to push a drill from the working well to the receiving well by a jack, to put a jacking pipe into the drill at a certain distance during the pushing process, and to repeat the pushing and pipe lowering until all the jacking pipes are pushed to the preset position. Pipe jacking construction does not require large-scale excavation and has been widely used in the field of underground pipe construction in China.

[0003] During the pipe jacking construction, the jacking pipe needs to be pushed forward together with the drill bit under the pushing action of the jack. A large pushing friction resistance is generated between the jacking pipe and the surrounding rock of the pipe hole, which results in low pushing efficiency. The pushing friction resistance also wears the pipe wall of the jacking pipe, causing damage to the jacking pipe. In addition, the pushing friction resistance also causes the drill bit at the front end to deviate from the advancing direction, which further results in poor construction accuracy of the jacking pipe. SUMMARY

[0004] An object of the present application is to solve at least the above problems and to provide at least the advantages to be described later.

[0005] Another object of the present application is to provide a pipe jacking construction device and a construction method to solve the technical problems described in the background.

[0006] In order to achieve these objects and other advantages according to the present application, the present application provides a pipe jacking construction device, which comprises a plurality of pushing auxiliary mechanisms, one pushing auxiliary mechanism is arranged at each end of each jacking pipe, and any two adjacent jacking pipes share one pushing auxiliary mechanism. Each pushing auxiliary mechanism comprises two clamping members in a half-cylindrical structure, the two clamping members form a hollow cylindrical structure around the end of the jacking pipe, and the two clamping members are detachably connected. Each clamping member comprises:

[0007] two first clamping shells arranged axially and spaced apart, each first clamping shell is in an arc shape, a plurality of ball seats are arranged on the first clamping shell, each ball seat is arranged to slide along the radial direction of the first clamping shell, a ball is movably arranged on each ball seat, and each ball can protrude from the convex surface of the first clamping shell and contact the hole wall of the jacking pipe hole;

[0008] a second clamping shell arranged between the two first clamping shells and connecting the two first clamping shells to form a half-cylindrical structure, the second clamping shell is made of an arc-shaped corrugated sheet;

[0009] A plurality of telescopic members are arranged on the inner side of the first clamping shell in the circumferential direction of the first clamping shell, one end of each telescopic member is connected to the concave surface of one of the first clamping shells, and the other end extends in the axial direction of the first clamping shell and is connected to the concave surface of the other first clamping shell.

[0010] Preferably, the pipe jacking device is characterized in that a plurality of through holes are arranged on each first clamping shell in the radial direction, each through hole is provided with a ball seat corresponding thereto, and each ball seat is slidably connected to the corresponding through hole in the radial direction.

[0011] Two mounting plates are arranged on the first clamping shell, each mounting plate is an arc-shaped structure arranged on the inner side of the first clamping shell and matched with the first clamping shell.

[0012] A first air bag is arranged between the mounting plate and the first clamping shell, a plurality of ball seats are arranged on the side of the first air bag close to the first clamping shell, one end of each ball seat is connected to the first air bag, and the other end extends in the radial direction and can pass through the corresponding through hole; and the air outlet of the first air bag is provided with an electromagnetic valve.

[0013] Preferably, the pipe jacking device is characterized in that a groove is arranged on one end surface of each first clamping shell in the circumferential direction, a protrusion matched with the groove is arranged on the other end surface, and each clamping member is clamped and connected through the groove and the protrusion.

[0014] Preferably, the pipe jacking device is characterized in that a plurality of clamping grooves are arranged on both sides of the groove of each first clamping shell and communicated with the groove, a plurality of second air bags are arranged on both sides of the protrusion and communicated with the first air bag, and each clamping groove is provided with a second air bag corresponding thereto, so that when the second air bag is inflated, the second air bag can be accommodated in the corresponding clamping groove.

[0015] Preferably, the pipe jacking device is characterized in that the radius of the first clamping shell is smaller than the radius of the pipe, a third air bag communicated with the first air bag is arranged on both sides of each first clamping shell in the axial direction, and when the two clamping members form a jacking auxiliary mechanism, the inside of the third air bag on each first clamping shell is inflated, so that the first clamping shell can be sealed and abutted to the inner wall of the corresponding pipe through the third air bag.

[0016] Preferably, the pipe jacking device is characterized in that the plurality of telescopic members on the two clamping members of each jacking auxiliary mechanism are arranged in opposite directions.

[0017] The application also provides a pipe jacking construction method of the pipe jacking device, which comprises the following steps:

[0018] Step 1: digging a working well and a receiving well at both ends of a pipe jacking area, installing a jack support and a jack in the working well, laying a track in the pipe jacking direction, arranging a drilling machine on the track, starting the jack to drive the drilling machine, and moving the drilling head of the drilling machine forward to drill a pipe hole.

[0019] Step two, extend the plurality of telescopic members of each clamping member, move the plurality of ball seats to a position where the balls protrude from the convex surface of the first clamping shell, the distance between the balls and the axis of the first clamping shell is equal to the diameter of the drilling rig, then combine the clamping members arranged in pairs at the end of the pipe jacking pipe to form a jacking auxiliary mechanism in the form of a cylindrical structure sleeved on the end of the pipe jacking pipe, and sleeve a jacking auxiliary mechanism at each end of the pipe jacking pipe to form a pipe jacking pipe unit, when the jacking distance of the jack is greater than the sum of the length of the pipe jacking pipe and the two jacking auxiliary mechanisms, retract the jack, place the pipe jacking pipe unit between the jack and the drilling rig, and continue to jack forward;

[0020] Step three, repeat step two until the drilling rig is jacked into the receiving well, and then remove the drilling rig from the receiving well;

[0021] Step four, continue to jack forward with the jack to jacking the jacking auxiliary mechanism closest to the receiving well into the receiving well, disassemble the jacking auxiliary mechanism and remove it from the receiving well, and when the jacking auxiliary mechanism is disassembled, disassemble the two clamping members and remove them from the end of the pipe jacking pipe;

[0022] Step five, sequentially disassemble the remaining jacking auxiliary mechanisms from the receiving well to the working well, and the disassembly of each jacking auxiliary mechanism includes: retracting each telescopic member, moving the ball seat towards the center of the first clamping shell to a position where the balls do not protrude from the convex surface of the first clamping shell, at this time the length of the jacking auxiliary mechanism is less than the distance between two adjacent pipe jacking pipes, disassembling the jacking auxiliary mechanism to form two independent clamping members, sequentially moving the two clamping members to the inside of the pipe jacking pipe, moving the clamping members along the length of the pipe to the receiving well / working well, and removing the clamping members from the receiving well / working well; and every time a jacking auxiliary mechanism is disassembled, the pipe jacking pipe is jacked forward using the jack to fill the gap between the two pipe jacking pipes corresponding to the removed jacking auxiliary mechanism.

[0023] Preferably, in the construction method, mud is injected between the pipe jacking pipe corresponding to the jacking auxiliary mechanism and the wall of the pipe jacking hole during the disassembly of the jacking auxiliary mechanism to seal the gap between the pipe jacking pipe and the pipe jacking hole.

[0024] The present application at least has the following advantages: the present application provides a device for pipe jacking construction, which is a jacking auxiliary mechanism sleeved on the end of the pipe jacking pipe, which can support the pipe jacking pipe during jacking to prevent the pipe jacking pipe from contacting the surrounding rock of the pipe jacking hole, thereby reducing the frictional resistance between the pipe jacking pipe and the surrounding rock of the pipe jacking hole during jacking, improving the efficiency of pipe jacking construction, and reducing the wear of the pipe jacking pipe during jacking; further, the jacking auxiliary mechanism of the present application can be disassembled after the completion of pipe jacking construction and can be used for the next pipe jacking construction project, which has high economic practicality.

[0025] Other advantages, objectives and features of the present invention will become apparent in part from the following description, and in part from those skilled in the art through study and practice of the invention. Attached Figure Description

[0026] Figure 1 This is a general layout diagram of pipe jacking construction as described in one technical solution of the present invention;

[0027] Figure 2 This is a schematic diagram of the structure of the pipe jacking auxiliary mechanism in another technical solution of the present invention;

[0028] Figure 3 for Figure 2 Cross-sectional view of AA;

[0029] Figure 4 for Figure 2 Cross-sectional view of BB.

[0030] Explanation of reference numerals in the attached drawings: 1-Working well; 2-Receiving well; 31-Jack support; 32-Jack; 33-Railway; 34-Drilling rig; 4-Jack pipe; 5-Jack pipe auxiliary mechanism; 51-First chuck; 52-Second chuck; 53-Ball bearing seat; 54-Ball bearing; 55-Mounting plate; 56-First airbag; 571-Groove; 572-Protrusion; 58-Telescopic component. Detailed Implementation

[0031] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments, so that those skilled in the art can implement it based on the description.

[0032] It should be understood that terms such as “having,” “comprising,” and “including” as used herein do not exclude the presence or addition of one or more other elements or combinations thereof.

[0033] It should be noted that, unless otherwise specified, the experimental methods described in the following implementation plan are all conventional methods, and the reagents and materials described are all commercially available unless otherwise specified.

[0034] In the description of this invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0035] like Figures 1-4As shown, the present application provides a pipe jacking construction device, which comprises a plurality of jacking auxiliary mechanisms 5, one jacking auxiliary mechanism 5 is arranged at each end of each pipe 4, and any two adjacent pipes 4 share one jacking auxiliary mechanism 5, each jacking auxiliary mechanism 5 comprises two clamping members in the form of half-cylinders, the two clamping members form a hollow cylindrical structure which is sleeved on the end of the pipe 4, and the two clamping members are detachably connected; each clamping member comprises:

[0036] two first clamping shells 51 which are arranged axially and spaced apart, each first clamping shell 51 is in the form of an arc, a plurality of ball seats 53 are arranged on the upper surface of the first clamping shell 51, each ball seat 53 is arranged to slide in the radial direction of the first clamping shell 51, a ball 54 is movably arranged on each ball seat 53, and each ball 54 can protrude from the convex surface of the first clamping shell 51 and contact the hole wall of the pipe hole;

[0037] a second clamping shell 52 which is arranged between the two first clamping shells 51 and connects the two first clamping shells 51 to form a half-cylindrical structure, the second clamping shell 52 is made of an arc-shaped corrugated sheet;

[0038] a plurality of expansion joints 58 which are arranged on the inner side of the first clamping shell 51 in the circumferential direction of the first clamping shell 51, one end of each expansion joint 58 is connected to the concave surface of one of the first clamping shells, and the other end extends in the axial direction of the first clamping shell 51 and is connected to the concave surface of the other first clamping shell.

[0039] In the above technical solution, the present application provides a device for pipe jacking construction, which is a jacking auxiliary mechanism sleeved on the end of the pipe, which can support the pipe during jacking so that the pipe does not contact the hole wall of the pipe hole, thereby reducing the frictional resistance between the pipe and the hole wall of the pipe hole during pipe jacking, improving the efficiency of pipe jacking construction, and reducing the wear of the pipe wall during jacking.

[0040] The pipe jacking construction device of the application comprises a plurality of jacking auxiliary mechanisms, one jacking auxiliary mechanism is sleeved on each end of the pipe, any two adjacent pipes share one jacking auxiliary mechanism, the whole pipe is supported by the jacking auxiliary mechanism, so that the pipe wall is not in contact with the surrounding rock of the inner wall of the pipe hole, each jacking auxiliary mechanism comprises two C-shaped structure clamping pieces, the two clamping pieces are closed to form a hollow cylindrical structure jacking auxiliary mechanism sleeved on the end of the pipe, the two ends of the clamping piece in the circumferential direction are detachably connected, each clamping piece comprises two C-shaped structure first clamping shells, a second clamping shell connecting the two first clamping shells, and a plurality of expansion joints arranged inside the two first clamping shells and connecting the two first clamping shells, each first clamping shell is made of wear-resistant hard metal material, the second clamping shell is made of wear-resistant and ductile corrugated sheet, the two first clamping shells are connected by the second clamping shell, so that the clamping piece has ductility in the axial direction (elongation and shortening in the axial direction), a plurality of balls are arranged on each first clamping shell, each ball is arranged on the first clamping shell by a ball seat, and each ball seat is slidably arranged on the first clamping shell in the radial direction, and the ball is rollingly embedded on the ball seat; the head of each expansion joint is arranged inside one of the first clamping shells, the free end of the piston rod is arranged inside the other first clamping shell, the elongation and shortening of the plurality of expansion joints realize the elongation and shortening of the clamping piece in the axial direction, and during the pipe jacking construction process, when it is necessary to adjust the pipe jacking angle, the length of the plurality of expansion joints of the jacking auxiliary mechanism can be adjusted to realize multi-position local adjustment, and the pipe jacking angle can be more accurately adjusted.

[0041] During the specific construction process of the pipe jacking construction device, the jacking auxiliary mechanism (the expansion joint is elongated, and the ball is pushed outwards to a position protruding from the pipe wall) is sleeved on the end of the pipe to form a pipe unit (except that the first pipe needs to be sleeved on the jacking auxiliary mechanism at both ends, and the other pipes only need to be sleeved at the rear end, because the front end of the other pipes shares one jacking auxiliary mechanism with the rear end of the pipe that has been lowered in the front), the whole pipe unit is lowered, and the existing pipe jacking construction process is used to complete the pipe jacking by using the jack in cooperation with the drilling machine, when all the pipes are lowered and jacked, the jacking auxiliary mechanism is disassembled from the receiving well to the working well, the jack is jacked forward every time the jacking auxiliary mechanism is disassembled, and the operation is repeated, when all the jacking auxiliary mechanisms are completely disassembled, each pipe is also connected to form a sealed pipeline.

[0042] In another technical solution, the pipe jacking construction device, a plurality of through holes are arranged on each first clamping shell at intervals, each through hole is arranged in the radial direction, each through hole is provided with a ball seat 53, and each ball seat 53 is slidably connected with the corresponding through hole in the radial direction; each clamping piece further comprises:

[0043] Two installation plates 55, one installation plate 55 is arranged corresponding to one first clamping shell 51, each installation plate 55 is an arc structure arranged inside the first clamping shell 51 and matched with the first clamping shell 51;

[0044] A first air bag 56 is arranged between the installation plate 55 and the first clamping shell 51, a plurality of ball seats 53 are arranged on the side of the first air bag 56 close to the first clamping shell 51, one end of each ball seat 53 is connected with the first air bag 56, and the other end extends in the radial direction and can pass through the corresponding through hole; the air outlet of the first air bag 56 is provided with an electromagnetic valve.

[0045] In the above technical solution, the present application discloses an implementation manner of the ball seat and the ball moving in the radial direction on the first clamping shell, the first air bag and the first clamping shell are connected through the installation plate, when the first air bag is not inflated, the ball seat and the ball are accommodated in the through hole on the first clamping shell, at this time, the ball does not protrude from the circumferential surface (convex surface) of the first clamping shell, when the first air bag is inflated, the ball seat is pushed outwards, and then the ball is moved to the outside of the through hole and protrudes from the circumferential surface of the first clamping shell, the air outlet is provided with an electromagnetic valve, and the construction personnel can open the air outlet through the intelligent remote control mode to discharge the gas of the first air bag.

[0046] In the pipe jacking construction process, the first air bag is inflated, the ball protrudes from the circumferential surface of the first clamping shell and the pipe wall of the pipe jacking (the distance between the top of the ball and the axis of the first clamping shell is greater than the radius of the pipe jacking), so that the ball can contact the hole wall of the pipe jacking hole, and the ball rolls forward during the jacking process; when the pipe jacking construction is completed, the electromagnetic valve is opened, the gas of the first air bag is discharged, the ball moves to the through hole, the radius of the clamping piece is less than the radius of the pipe jacking, the clamping piece can be moved into the pipe jacking, and the clamping piece can be moved into the receiving well / work well along the length direction of the pipeline, and the clamping piece can be lifted out, and then the jacking auxiliary mechanism can be disassembled after the construction is completed, and the jacking auxiliary mechanism can be reused.

[0047] In another technical solution, the pipe jacking construction device, one end surface of each first clamping shell 51 is provided with a groove 571 in the circumferential direction, and the other end surface is provided with a protrusion 572 matched with the groove, and each clamping piece is connected through the groove 571 and the protrusion 572. When the two clamping pieces are combined to form a jacking auxiliary mechanism in the form of a cylinder, the end part is sealed and connected through the groove and the protrusion, which is simple in structure and easy to disassemble.

[0048] In another technical solution, the jacking pipe construction device, the recess 571 of each first clamping shell 51 is provided with a plurality of clamping grooves in communication with the recess on both sides, the two sides of the protruding block 572 are provided with a plurality of second air bags in communication with the first air bag 56, and one second air bag is arranged corresponding to each clamping groove. When the second air bag is inflated, the second air bag can be just accommodated in the corresponding clamping groove. In the above technical solution, the clamping block formed by the plurality of clamping grooves and the inflated second air bag is matched with the clamping connection of the recess and the protruding block, so that the double clamping connection of the two clamping pieces is realized, the firmness of the installation of the jacking auxiliary mechanism is improved, and the displacement and separation of the two clamping pieces during jacking are avoided. The clamping mode of the inflated type is simple in structure, easy to operate, and convenient for disassembly of the subsequent clamping pieces.

[0049] In another technical solution, the jacking pipe construction device, the radius of the first clamping shell 51 is smaller than the radius of the jacking pipe 4, and the two sides of each first clamping shell 51 are provided with a third air bag in communication with the first air bag 56 in the axial direction. When the two clamping pieces form the jacking auxiliary mechanism, the third air bag inside each first clamping shell 51 is inflated, and the first clamping shell 51 can be sealed and abutted with the inner wall of the corresponding jacking pipe 4 through the third air bag. The first air bag is inflated to push the ball out, and the second air bag is also inflated to form a clamping block clamped in the clamping groove. Further, the third air bag can be filled with gas, so that the circumferential edge of the jacking auxiliary mechanism on the two sides in the axial direction is inserted into the jacking pipe, and the third air bag is abutted with the inner wall of the jacking pipe. By arranging the third air bag, the jacking auxiliary mechanism can be in sealed contact with the circumferential edge of the jacking pipe end, so that the surrounding soil is prevented from falling into the jacking pipe during the jacking pipe construction process, and the jacking pipe is prevented from being contaminated.

[0050] In another technical solution, the jacking pipe construction device, the plurality of telescopic pieces on the two clamping pieces of each jacking auxiliary mechanism are reversely arranged. The head of each telescopic piece of one clamping piece is located at the left end, and the free end of the piston rod is located at the right end. The head of each telescopic piece of the other clamping piece is located at the right end, and the free end of the piston rod is located at the left end. The telescopic pieces of the two clamping pieces are reversely arranged, and during the disassembly of the jacking auxiliary mechanism, the two clamping pieces can be moved to the left and right sides without interfering with each other through the retraction of the telescopic pieces. In this way, the clamping pieces can be moved into the jacking pipe and transported out along the length direction of the pipeline.

[0051] The jacking pipe construction device also provides a construction method of the jacking pipe construction device, which includes the following steps:

[0052] Step one, a working well 1 and a receiving well 2 are dug at both ends of the jacking pipe construction area respectively, a jack support 31 and a jack 32 are installed in the working well 1, a track 33 is laid along the jacking direction of the jacking pipe 4, a drilling machine 34 is arranged on the track 33, the jack 32 is started to push the drilling machine, the drill bit of the drilling machine moves forward, and the jacking pipe hole is drilled;

[0053] Step two, extend the plurality of telescopic members 58 of each clamping member, move the plurality of ball seats 53 to the position where the balls 54 protrude from the convex surface of the first clamping shell 51, the distance between the balls 54 and the axis of the first clamping shell is equal to the diameter of the drilling rig 34, then combine the pairs of clamping members to form a cylindrical structure of the jacking auxiliary mechanism 5 set on the end of the jacking pipe 4, set a jacking auxiliary mechanism 5 on each end of the jacking pipe 4 to form a jacking pipe unit, when the jack 32 is extended by a distance greater than the sum of the length of the jacking pipe 4 and the two jacking auxiliary mechanisms 5, retract the jack 32, place the jacking pipe unit between the jack 32 and the drilling rig 34, and continue to extend the jack 32 forward;

[0054] Step three, repeat step two until the drilling rig 34 is jacked into the receiving well, and then remove the drilling rig 34 from the receiving well; except for the first lowered jacking pipe, the jacking pipe units corresponding to the remaining jacking pipes each include a jacking pipe and a jacking auxiliary mechanism set on the rear end of the jacking pipe, and the front end of the jacking pipe shares a jacking auxiliary mechanism with the rear end of the previous jacking pipe (which has been lowered);

[0055] Step four, continue to extend the jack 32 to jacking the jacking auxiliary mechanism 5 closest to the receiving well into the receiving well 2, disassemble the jacking auxiliary mechanism and remove it from the receiving well 2, and when the jacking auxiliary mechanism is disassembled, the two clamping members are disassembled and removed from the end of the jacking pipe;

[0056] Step five, sequentially disassemble the remaining jacking auxiliary mechanisms from the receiving well 2 to the working well 1, and the disassembly of each jacking auxiliary mechanism includes: retracting each telescopic member 58, moving the ball seat 53 towards the central position close to the first clamping shell 51 to the position where the ball 54 does not protrude from the convex surface of the first clamping shell 51, at this time the length of the jacking auxiliary mechanism 5 is less than the distance between two adjacent jacking pipes, disassembling the jacking auxiliary mechanism 5 to form two independent clamping members, sequentially moving the two clamping members to the inside of the jacking pipe 4, moving the clamping members along the length of the pipeline to the receiving well / working well, and removing the clamping members from the receiving well / working well; after disassembling one jacking auxiliary mechanism, use the jack to advance the jacking pipe, and fill the gap between the two jacking pipes corresponding to the removed jacking auxiliary mechanism.

[0057] In the above technical solution, the present application provides a jacking pipe construction method, which uses the above-mentioned jacking pipe construction device to achieve the following: when each jacking pipe is lowered, a jacking auxiliary mechanism is set on the end of the jacking pipe, the balls of the jacking auxiliary mechanism are in contact with the surrounding rock of the hole wall of the jacking rod hole, the balls can roll relative to the ball seat, so that the jacking pipe wall is not in contact with the surrounding rock of the hole wall of the jacking pipe hole, and when the jack is extended forward, the jacking pipe that has been lowered moves forward along the jacking pipe hole together with the jacking auxiliary mechanisms at both ends, greatly reducing the frictional resistance of the jacking pipe during jacking, thereby improving the jacking pipe construction efficiency, and further effectively preventing the jacking pipe wall from being worn by the surrounding rock of the hole wall of the jacking pipe hole.

[0058] In another technical solution, during the dismantling of each jacking auxiliary mechanism, slurry is injected between the jacking pipe and the borehole wall corresponding to that jacking auxiliary mechanism to seal the gap between the jacking pipe and the borehole. By injecting slurry, the gap between the jacking pipe and the borehole can be sealed, improving the sealing and stability of the jacking pipe installation.

[0059] The specific construction method of this invention is as follows:

[0060] The pipe jacking section closest to the receiving shaft is designated as number 1, and the pipe jacking sections from the receiving shaft towards the working shaft are numbered sequentially as 2#, 3#, 4#, etc.; the pipe jacking construction method of this invention is specifically as follows:

[0061] Step 100, as follows Figure 1 As shown, according to the centerline of the designed pipeline, working shaft 1 and receiving shaft 2 are excavated downwards at both ends of the planned pipe jacking construction area. The depth of the working shaft is greater than the pipe jacking burial depth to facilitate the installation of jack supports and rails. Reinforced concrete is poured on the side walls of the working shaft and receiving shaft, and concrete is laid on the bottom surface for sealing and a reinforced concrete base slab is poured. Then, jack supports and jacks are installed in the working shaft using existing technology. A rail extending along the length of the pipeline is laid at the bottom of the working shaft, and the drilling rig is placed on the rail with the drill bit facing towards the receiving shaft. After installation, the jacks are started to push the drilling rig forward, and the drill bit moves forward to drill the pipe jacking hole.

[0062] Step 200, factory prefabricate jacking pipe and engaging piece, the diameter of the first clamping shell and the second clamping shell of the engaging piece is smaller than the inner diameter of the jacking pipe, so that the hollow cylindrical structure formed by the two engaging pieces can be inserted into the inside of the jacking pipe, and can be moved into the inside of the jacking pipe and along the length direction of the pipe to the receiving well / work well during the disassembling process of the engaging piece; before the 1# jacking pipe is lowered, a jacking aid mechanism is respectively sleeved on both ends of the 1# jacking pipe, specifically, the two engaging pieces are combined at the end of the 1# jacking pipe, the protrusions arranged on the two engaging pieces are accommodated in the grooves, the hollow cylindrical structure formed by the two engaging pieces is inserted into the inside of the jacking pipe, the first gas bag and the second gas bag on the two engaging pieces are inflated, so that the first gas bag, the second gas bag and the third gas bag are filled with gas (the gas used is harmless inert gas), after the first gas bag is inflated, the ball seat is pushed outwards, and then the ball is pushed to a position protruding from the circumferential side of the jacking pipe (when the first gas bag is not inflated, the ball seat and the ball are accommodated in the through hole), after the second gas bag is inflated, a clamping block is formed in the clamping groove, so that the two engaging pieces are firmly connected, after the third gas bag is inflated, the jacking aid mechanism is sealed and abuts against the inner wall of the jacking pipe through the third gas bag, the jacking aid mechanism is connected with the jacking pipe, and the telescopic piece is elongated to the maximum; after the jacking aid mechanism is sleeved on both ends of the 1# jacking pipe, a 1# jacking pipe unit is formed; when the forward jacking distance of the jack is not less than the length of the 1# jacking pipe unit, the jack is retracted, the 1# jacking pipe unit is lowered to the jack and the drilling machine by using hoisting equipment, so that the 1# jacking pipe unit is coaxially contacted with the drilling machine, and the jack is started to continue forward jacking;

[0063] Step 300, according to the sleeving mode of the jacking aid mechanism described in step 200, a jacking aid mechanism is sleeved on the rear end of the 2# jacking pipe to form a 2# jacking pipe unit, when the forward jacking distance of the jack in step 200 is not less than the 2# jacking pipe unit, the jack is retracted, the 2# jacking pipe unit is lowered to the 1# jacking pipe unit and the jack by using hoisting equipment, so that the 2# jacking pipe unit is coaxial with the 1# jacking pipe unit, the jack is started to forward jacking, so that the circumferential edge inner wall of the front end of the 2# jacking pipe is sealed and abuts against the rear end of one circle of third gas bags of the rear end of the jacking aid mechanism of the 1# jacking pipe unit, and the jack continues to forward jacking;

[0064] Step 400, repeat step 300 until all jacking pipes are hoisted and lowered, the jack continues to forward jacking until the drilling machine moves into the receiving well, and the drilling machine is lifted upward and taken out from the receiving well;

[0065] Step 500, the jacks continue to push in to the front end of the 1# pipe pushing auxiliary mechanism moves to the receiving well, the electromagnetic valves corresponding to the pushing auxiliary mechanism are opened, the third air bag of the pushing auxiliary mechanism is unsealed from the inner wall of the pipe, the first clamping shell is unclamped, at this time the pushing auxiliary mechanism can be moved a certain distance, so that the end of the pushing auxiliary mechanism does not interfere with the 1# pipe, then the pushing auxiliary mechanism is lifted upwards, and then the pushing auxiliary mechanism is disassembled and moved out of the receiving well;

[0066] Step 600, the jacks continue to push in to the front end of the 1# pipe pushing auxiliary mechanism moves to the receiving well, the electromagnetic valves corresponding to the pushing auxiliary mechanism are opened, the third air bag of the pushing auxiliary mechanism is unsealed from the inner wall of the pipe, the first clamping shell is unclamped, at this time the pushing auxiliary mechanism can be moved a certain distance, so that the end of the pushing auxiliary mechanism does not interfere with the 1# pipe, then the pushing auxiliary mechanism is lifted upwards, and then the pushing auxiliary mechanism is disassembled and moved out of the receiving well;

[0067] Step 700, repeat step 600 along the sequence of the receiving well to the working well to disassemble and remove the remaining pushing auxiliary mechanisms in turn, until all the pushing auxiliary mechanisms are disassembled, during the disassembly process of the pushing auxiliary mechanisms, the distance between the location of the pushing auxiliary mechanism and the receiving well and the working well is determined to determine whether to move into the receiving well or the working well and to be lifted upwards and taken out, that is, if the distance between the location of the pushing auxiliary mechanism and the receiving well is less than the distance between the location of the pushing auxiliary mechanism and the working well, the pushing auxiliary mechanism is moved into the receiving well and lifted upwards and taken out from the receiving well, otherwise the pushing auxiliary mechanism is moved into the working well.

[0068] The pushing auxiliary mechanism is injected with mud during disassembly according to the following mode to seal the gap between the pipe and the pipe hole:

[0069] The disassembly process of the 1# pipe corresponding pushing auxiliary mechanism to the n# pipe corresponding pushing auxiliary mechanism is as follows:

[0070] S1, disassembly of the jacking auxiliary mechanism corresponding to the 1# pipe: after the jacking auxiliary mechanism at the front end of the 1# pipe is jacked into the receiving well, it is disassembled from the 1# pipe and taken out of the receiving well, then mud is injected from the front end of the 1# pipe to the gap between the 1# pipe and the surrounding rock of the pipe hole, and the gap between the 1# pipe and the surrounding rock of the pipe hole is sealed; then the jacking auxiliary mechanism at the rear end (front end of the 2# pipe) of the 1# pipe is disassembled, the electromagnetic valve of the first air bag is opened, and the gas in the first air bag, the second air bag and the third air bag is discharged, the jacking auxiliary mechanism is sleeved with the pipe in contact, the third air bag no longer abuts against the inner wall of the pipe, the two clamping pieces are in contact (the clamping block formed by the second air bag is not clamped in the clamping groove), the extension pieces of the two clamping pieces are retracted, so that the two clamping pieces are shortened, at this time, the sum of the axial lengths of the two shortened clamping pieces is less than the distance between the 1# pipe and the 2# pipe, the positions of the two clamping pieces in the radial direction are staggered and do not interfere with each other, facilitating the movement of the two clamping pieces into the pipe in turn, for example, as described in detail below Figure 2 for example, one clamping piece located at the upper part is moved to the left after the extension piece is retracted, one clamping piece located at the lower part is moved to the right after the extension piece is retracted, and the two clamping pieces do not overlap in the upward direction, the shortened clamping piece located at the upper part is pulled downward to move into the pipe and is moved to the receiving well / working well (the well closer to which is moved to which) along the length direction of the pipe hole, the shortened clamping piece located at the lower part is lifted upward to move into the pipe and is moved to the receiving well / working well (the well closer to which is moved to which) along the length direction of the pipe hole, and the jack is started to push the 2# pipe and all pipes located at the rear end of the 2# pipe forward to the front end of the 2# pipe in sealing contact with the rear end of the 1# pipe;

[0071] S2, disassembly of the jacking auxiliary mechanism corresponding to the 2# pipe: the electromagnetic valve of the first air bag corresponding to one clamping piece located at the upper part of the jacking auxiliary mechanism at the rear end of the 2# pipe is opened, the extension piece corresponding to the one clamping piece located at the upper part is retracted, a gap leaks between the clamping piece located at the upper part and the 2# pipe / 3# pipe, then mud is injected from the gap to the gap between the 2# pipe and the surrounding rock of the pipe hole, the gap between the 2# pipe and the surrounding rock of the pipe hole is sealed, then the electromagnetic valve of the first air bag corresponding to one clamping piece located at the lower part of the jacking auxiliary mechanism at the rear end of the 2# pipe is opened, the jacking auxiliary mechanism at the rear end of the 2# pipe is disassembled and moved to the receiving well / working well for taking out, and the jack is started to push the 3# pipe and all pipes located at the rear end of the 3# pipe forward to the front end of the 3# pipe in sealing contact with the rear end of the 2# pipe;

[0072] S3, repeat operation S2 until the disassembly of the jacking auxiliary mechanism at the front end of the last pipe (n# pipe) is completed, and the n# pipe is further jacked into sealing contact with the (n-1)# pipe by the jack.

[0073] S4, dismounting of the pushing aid mechanism at the rear end of the n# pipe, opening of the electromagnetic valve at the upper clamping element, injection of slurry between the n# pipe and the surrounding rock of the pipe hole, sealing of the gap between the n# pipe and the surrounding rock of the pipe hole, subsequently opening of the electromagnetic valve at the lower clamping element, pulling of the pushing aid mechanism directly from the working shaft to the working shaft and removal, i.e. completion of the dismounting of all pushing aid mechanisms, and sealing of all gaps between the pipes and the surrounding rock of the pipe hole during this process.

[0074] The number of devices and the scale of the processes described herein are intended to simplify the description of the application. Applications, modifications and variations of the application will be apparent to those skilled in the art.

[0075] While embodiments of the application have been disclosed in connection with the specified examples above, it should be understood that it can be embodied in many other specific forms without departing from the spirit or central characteristics of the application. Thus, the present examples are to be considered in all respects as illustrative and not restrictive, and the scope of the application to be indicated by the appended claims rather than the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are intended to be embraced therein.

Claims

1. A pipe jacking apparatus, characterised in that, The pushing auxiliary mechanism includes two clamping members, each of which is a hollow cylindrical structure, and the two clamping members are detachably connected. Each of the clamping members includes: two first clamping shells which are arranged in an axial direction and each of which is an arc structure, a plurality of ball seats are arranged on the first clamping shell, each of the ball seats is arranged in a radial direction of the first clamping shell, and each of the ball seats movably has a ball, each of the balls can protrude from a convex surface of the first clamping shell and contact a hole wall of the pipe hole; a second clamping shell which is arranged between the two first clamping shells and connects the two first clamping shells to form a semi-cylindrical structure, and the second clamping shell is made of an arc structure of a corrugated sheet; 2. The pipe jacking apparatus of claim 1, wherein, a plurality of expansion members which are arranged on an inner side of the first clamping shell in a circumferential direction of the first clamping shell, one end of each of the expansion members is connected to a concave surface of one of the first clamping shells, and the other end of each of the expansion members extends in the axial direction of the first clamping shell and is connected to a concave surface of the other first clamping shell. Each of the first clamping shells has a plurality of through holes arranged in an interval, each of the through holes is arranged in a radial direction, each of the ball seats is arranged corresponding to the through hole, and each of the ball seats is connected to the corresponding through hole in a radial direction; and each of the clamping members further includes: two mounting plates, one of the mounting plates is arranged corresponding to one of the first clamping shells, and each of the mounting plates is an arc structure arranged on the inner side of the first clamping shell and matched with the first clamping shell; 3. The pipe jacking apparatus of claim 2, wherein, a first air bag arranged between the mounting plate and the first clamping shell, a plurality of ball seats arranged on a side of the first air bag close to the first clamping shell, one end of each of the ball seats connected to the first air bag, and the other end of each of the ball seats extending in a radial direction and passing through the corresponding through hole; and an electromagnetic valve arranged on a gas outlet of the first air bag.

4. The pipe jacking apparatus of claim 3, wherein, One of the end faces of each of the first clamping shells arranged in the circumferential direction is provided with a groove, and the other end face is provided with a protrusion matched with the groove, and each of the clamping members is connected by the groove and the protrusion.

5. The pipe jacking apparatus of claim 4, wherein, The two sides of the groove of each of the first clamping shells are provided with a plurality of clamping grooves communicated with the groove, the two sides of the protrusion are provided with a plurality of second air bags communicated with the first air bag, and each of the clamping grooves is provided with one of the second air bags, and when the second air bag is inflated, the second air bag can be accommodated in the corresponding clamping groove.

6. The pipe jacking apparatus of claim 5, wherein, The radius of the first clamping shell is smaller than the radius of the pipe, and the two sides of each of the first clamping shells arranged in the axial direction are provided with a third air bag communicated with the first air bag, and when the two clamping members form the pushing auxiliary mechanism, the inside of the third air bag on each of the first clamping shells is inflated, and the first clamping shell is sealed and abuts against the inner wall of the corresponding pipe by the third air bag.

7. The pipe jacking construction method according to any one of claims 1 to 6, characterized in that, The expansion members on the two clamping members of each of the pushing auxiliary mechanisms are arranged in opposite directions. The method includes the following steps: In step one, a working well and a receiving well are dug at both ends of a pipe construction area, a jack support and a jack are installed in the working well, a track is laid in a pipe pushing direction, a drilling machine is arranged on the track, the jack is started to drive the drilling machine, and a pipe hole is drilled by a drill bit of the drilling machine. Step two, extend the plurality of telescopic members of each clamping member, move the plurality of ball seats to the position where the balls protrude from the convex surface of the first clamping shell, the distance from the balls to the axis of the first clamping shell is equal to the diameter of the drilling rig, then combine the clamping members arranged in pairs at the end of the pipe to form a jacking auxiliary mechanism in the form of a cylindrical structure around the end of the pipe, and set a jacking auxiliary mechanism at each end of the pipe to form a pipe unit, when the jack extends a distance greater than the sum of the length of a pipe and two jacking auxiliary mechanisms, retract the jack, place the pipe unit between the jack and the drilling rig, and continue to advance the jack; Step three, repeat step two until the drilling rig is pushed into the receiving well, and then remove the drilling rig from the receiving well; Step four, continue to advance the jack to push the jacking auxiliary mechanism closest to the receiving well into the receiving well, disassemble the jacking auxiliary mechanism and remove it from the receiving well, and when disassembling the jacking auxiliary mechanism, disassemble the two clamping members and remove them from the end of the pipe; Step five, disassemble the remaining jacking auxiliary mechanisms in the order from the receiving well to the working well, and the disassembly of each jacking auxiliary mechanism: retract each telescopic member, move the ball seat towards the center of the first clamping shell to the position where the ball does not protrude from the convex surface of the first clamping shell, at this time the length of the jacking auxiliary mechanism is less than the distance between two adjacent pipes, disassemble the jacking auxiliary mechanism to form two independent clamping members, move the two clamping members to the inside of the pipe in turn, move the clamping members along the length of the pipe to the receiving well / working well, and remove the clamping members from the receiving well / working well; every time a jacking auxiliary mechanism is disassembled, use the jack to advance the pipe, and directly fill the gap between the two pipes corresponding to the removed jacking auxiliary mechanism.

8. The construction method according to claim 7, wherein During the disassembly of each jacking auxiliary mechanism, mud is injected between the pipe corresponding to the jacking auxiliary mechanism and the pipe hole to seal the gap between the pipe and the pipe hole.

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