Construction method for the mud-water balance pipe jacking machine to get out of trouble

Abstract

The present invention relates to the technical field of pipe jacking machines, and discloses a construction method for a slurry balance pipe jacking machine to escape from trouble, including the following construction steps: (1) Confirm the trapped position of the pipe jacking machine, calculate and analyze the force condition; (2) Set up a receiving well; (3) Arrange the jacking cylinders in the opposite direction, the tool pipe and the pipe sections; (4) Connect the tool pipe to the pipe jacking machine; (5) The jacking cylinders in the starting well jack the connected tool pipe, pipe sections and pipe jacking machine forward to the receiving well. When the pipe jacking machine breaks down, install the tool pipe and the pipe sections in the receiving well, use the jacking cylinders in the opposite direction to jack the tool pipe and the pipe sections towards the trapped direction of the pipe jacking machine. After the tool pipe is connected to the pipe jacking machine, use the jacking cylinders in the starting well to push the pipe jacking machine empty to the receiving well, and take out the pipe jacking machine from the receiving well to avoid the situation that the pipe jacking machine is trapped underground for a long time.

Description

Technical Field

[0001] The invention patent relates to the technical field of pipe jacking machines, and specifically, to a method for constructing a mud-water balanced pipe jacking machine to get out of trouble. Background Art

[0002] Pipe jacking is a trenchless method for laying underground pipelines. It can be used to lay various pipelines across rivers, houses, railways and roads, and specifically involves pipeline projects of various systems such as power cable pipelines, communication cable pipelines, water supply and drainage pipelines, and gas pipelines. The specific process is to make a starting well at one end of the pipeline and a receiving well at the other end; then install the pipe jacking machine in the starting well, and with the thrust of the positive jacking cylinder of the starting well, push the pipe jacking machine from the starting well through the soil layer to the receiving well, and finally lift the pipe jacking machine in the receiving well to complete the laying of the entire pipeline.

[0003] When a pipe jacking machine encounters a malfunction during the excavation process that cannot be directly repaired, the head of the pipe jacking machine is generally removed for repair and replacement by opening a skylight. However, when the pipe jacking machine is trapped and unable to continue jacking when crossing important buildings, roads, bridges, rivers, culverts, pipelines and other obstacles, there are often no site conditions for opening a skylight above the pipe jacking machine, and the pipe jacking machine cannot be removed by opening the skylight, resulting in the pipe jacking machine being trapped underground for a long time, extending the construction period, increasing safety risks, and increasing processing costs. Summary of the invention

[0004] The purpose of the present invention is to provide a construction method for escaping a mud-water balanced pipe jacking machine, aiming to solve the problem in the prior art that the pipe jacking machine is trapped underground for a long time when a failure occurs.

[0005] The present invention is achieved by comprising the following construction steps:

[0006] (1) Confirm the trapped position of the pipe jacking machine and calculate and analyze the stress condition of the pipe jacking machine;

[0007] (2) According to the axis posture of the pipe jacking machine, geological conditions and surrounding environment, the conditions for counter-jacking the pipe jacking machine are determined. If the conditions are met, a receiving well is set up. Along the jacking direction of the pipe jacking machine, the receiving well is located in front of the pipe jacking machine and is arranged directly opposite to the jacking direction of the pipe jacking machine;

[0008] (3) A reverse jacking cylinder, a tool pipe and a pipe joint are arranged in the receiving well, the reverse jacking cylinder presses the pipe joint in reverse, the pipe joint presses the tool pipe in reverse to push it into the soil, and the jacking axis of the tool pipe is coaxially arranged with the axis of the pipe jacking machine;

[0009] (4) When the tool pipe is pushed to the position of the pipe jacking machine, the reverse push cylinder stops pushing in the reverse direction and docks the tool pipe with the pipe jacking machine;

[0010] The pipe jacking machine has a pipe jacking surface facing the tool pipe. Blades for cutting soil are provided on the pipe jacking surface. The tool pipe has a butt joint end face facing the pipe jacking machine. When the tool pipe is butted with the pipe jacking machine, the blades are inserted into the interior of the butt joint end face.

[0011] (5) The forward jacking oil cylinders placed in the launching shaft jack the pipe jacking machine forward until the pipe jacking machine is jacked into the receiving shaft.

[0012] Further, an anti-jacking back wall is installed in the receiving shaft and is arranged facing the pipe jacking machine. In the construction step (3), the rear end of the anti-jacking oil cylinder presses against the anti-jacking back wall, and the front end of the anti-jacking oil cylinder is arranged facing the pipe jacking machine.

[0013] Further, an anti-jacking track is provided at the bottom of the receiving shaft and extends in the direction facing the pipe jacking machine. In the construction step (3), the tool pipe and the pipe sections are installed on the anti-jacking track. Under the reverse jacking action of the anti-jacking oil cylinder, the tool pipe and the pipe sections move along the anti-jacking track towards the pipe jacking machine.

[0014] Further, a drag reduction agent for reducing resistance is respectively smeared on the outer surfaces of the tool pipe and the pipe sections.

[0015] Further, there is a jacking gap between the outer surface of the pipe section and the soil body. Grouting holes are provided in the side wall of the pipe section, and the grouting holes communicate with the interior of the pipe section and the jacking gap.

[0016] In the construction step (3), during the process of the anti-jacking oil cylinder jacking the tool pipe and the pipe sections in the reverse direction, drag reduction slurry for reducing resistance is injected into the jacking gap through the grouting holes.

[0017] Further, in the construction step (5), during the process of the forward jacking oil cylinders pushing the butted tool pipe, pipe sections and pipe jacking machine empty to the receiving shaft, each time the receiving shaft receives a pipe section, the pipe section is promptly hoisted out and transported to the launching shaft for reuse until all the pipe sections in front of the pipe jacking machine are pushed out to the receiving shaft.

[0018] Further, an elastic ring is provided on the pipe jacking surface and is arranged to surround the pipe jacking surface circumferentially. The blades extend towards the butt joint end face to the outside of the elastic ring. In the construction step (4), when the tool pipe is butted with the pipe jacking machine, the elastic ring is in close contact with the butt joint end face.

[0019] Further, the elastic ring has a plurality of blade grooves, the plurality of blade grooves are evenly distributed around the center of the elastic ring, the blade is located in the blade groove, and the butt end surface has a plurality of blade grooves arranged corresponding to the blade;

[0020] In the construction step (4), when the tool pipe is docked with the pipe jacking machine, the blade is inserted into the blade groove.

[0021] Further, the elastic ring is provided with a plurality of engaging grooves, the plurality of engaging grooves are evenly distributed around the center of the elastic ring, the engaging groove has an engaging groove opening facing the butt end surface, the inside of the engaging groove is rotatably connected with a rotating bar, the rotating bar extends outwardly with an engaging bar facing the pipe jacking machine, the side surface of the tool pipe has a bayonet groove, along the direction of the pipe jacking machine toward the tool pipe, the engaging bar is arranged outwardly obliquely, and the rotating bar and the engaging bar are placed inside the engaging groove;

[0022] In the construction step (4), when the butt joint end face is butt jointed with the elastic ring, the butt joint end face presses against the elastic ring to be compressed and deformed, the locking strip extends out of the locking slot, and the locking strip gradually swings inward until the locking strip is embedded in the locking slot.

[0023] Furthermore, the rotation bar has a compression bar extending toward the center of the elastic ring, and the compression bar is inclined toward the butt end surface;

[0024] In the construction step (4), when the butt end face is butted against the elastic ring, the butt end face presses against the elastic ring to be compressed and deformed, and the pressure strip in the elastic ring swings toward the top tube surface under the pressure of the tool tube, and the rotating strip rotates toward the top tube surface accordingly, and the engaging strip swings toward the bayonet groove accordingly, until the bottom of the pressure strip is in contact with the top tube surface and the engaging strip is completely embedded in the bayonet groove.

[0025] Compared with the prior art, the present invention provides a method for rescuing a slurry-balanced pipe jacking machine. When the pipe jacking machine fails, tool pipes and pipe sections are installed in the receiving well, and the tool pipes and pipe sections are pushed in the direction where the pipe jacking machine is trapped by using a reverse-pushing cylinder. After the tool pipe and the pipe jacking machine are docked, the positive-pushing cylinder in the starting well is used to push the pipe jacking machine empty to the receiving well, and the pipe jacking machine is taken out from the receiving well, thereby avoiding the situation where the pipe jacking machine is trapped underground for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a construction flow chart of the mud-water balance pipe jacking machine escape construction method provided by the present invention;

[0027] Figure 2It is a construction schematic diagram of the construction method for the sludging balance pipe jacking machine to escape from trouble provided by the present invention;

[0028] Figure 3 It is a three-dimensional view of the pipe jacking machine of the construction method for the sludging balance pipe jacking machine to escape from trouble provided by the present invention;

[0029] Figure 4 It is a three-dimensional view of the tool pipe of the construction method for the sludging balance pipe jacking machine to escape from trouble provided by the present invention;

[0030] Figure 5 It is a partial enlarged view of the pipe jacking machine of the construction method for the sludging balance pipe jacking machine to escape from trouble provided by the present invention;

[0031] Figure 6 It is a three-dimensional view of the pipe jacking machine and the tool pipe after docking of the construction method for the sludging balance pipe jacking machine to escape from trouble provided by the present invention;

[0032] In the figure: pipe jacking machine 100, pipe section 101, reaction jacking back wall 102, receiving well 103, reaction jacking oil cylinder 104, tool pipe 105, blade 106, docking end face 107, launching well 108, direct jacking oil cylinder 109, support 110, reaction jacking track 111, jacking clearance 112, grouting hole 113, elastic ring 114, pipe jacking surface 115, blade groove 116, engaging groove 117, rotating shaft 118, engaging strip 119, bayonet slot 120, pressure-receiving strip 121, rotating strip 122, support piece 123, knife-edge groove 124. Specific embodiments

[0033] In order to make the purpose, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0034] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0035] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", etc. indicating the orientation or positional relationship, they are based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and cannot be understood as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0036] Refer to Figures 1 to 6 as shown, it is a preferred embodiment provided by the present invention.

[0037] Construction method for the trapped slurry shield pipe jacking machine, including the following construction steps:

[0038] (1) Confirm the trapped position of the pipe jacking machine 100, and calculate and analyze the force condition of the pipe jacking machine 100.

[0039] Perform jacking force calculation on the total jacking force required for reverse jacking, the maximum jacking force allowed on the force transmission surface of the jacked pipe section 101, and the jacking force borne by the reverse jacking back wall 102. Through the jacking force calculation, make the jacking force meet the requirements of reverse jacking.

[0040] (2) Conduct technical analysis on the axis attitude, obstacle situation, equipment situation, geological situation, and surrounding environment of the trapped pipe jacking machine 100.

[0041] According to the axis attitude, geological situation, and surrounding environment of the pipe jacking machine 100, judge the conditions for reverse jacking the pipe jacking machine 100. If the conditions are met, arrange a receiving well 103. Along the jacking direction of the pipe jacking machine 100, the receiving well 103 is located in front of the pipe jacking machine 100 and is arranged directly opposite to the jacking direction of the pipe jacking machine 100.

[0042] (3) Select reverse jacking cylinders 104 according to the data calculated in step (1). The size and quantity of the reverse jacking cylinders 104 should be able to meet the requirements of the total reverse jacking force. Install reverse jacking cylinders 104, a tool pipe 105, and pipe sections 101 in the receiving well 103. The reverse jacking cylinders 104 press against the pipe sections 101 in the reverse direction, and the pipe sections 101 press against the tool pipe 105 and jack it into the soil. The jacking axis of the tool pipe 105 is arranged coaxially with the axis of the pipe jacking machine 100.

[0043] After starting the reverse jacking cylinders 104, the reverse jacking cylinders 104 push the pipe sections 101 to jack in the direction of the trapped pipe jacking machine 100, and the pipe sections 101 push the tool pipe 105 into the soil. Combining with the axis of the trapped pipe jacking machine 100 analyzed in step (2), use measuring equipment such as laser theodolites, levels, and total stations to measure the reverse jacking axis of the tool pipe 105 and the pipe sections 101, and correct the reverse jacking direction of the tool pipe 105 and the pipe sections 101 according to the measurement results of the reverse jacking axis.

[0044] (4) When the tool pipe 105 jacks to the position of the pipe jacking machine 100, the reverse jacking cylinders 104 stop reverse jacking, and connect the tool pipe 105 to the pipe jacking machine 100.

[0045] The pipe jacking machine 100 has a pipe jacking face 115. The pipe jacking face 115 faces the tool pipe 105, and blades 106 are provided on the pipe jacking face 115 for cutting soil. The tool pipe 105 has a docking end face 107 facing the pipe jacking machine 100. When the tool pipe 105 is connected to the pipe jacking machine 100, the blades 106 are inserted into the interior of the docking end face 107.

[0046] (5) The jacking cylinder 109 placed in the launching shaft 108 jacks the pipe jacking machine 100 forward until the pipe jacking machine 100 is jacked into the receiving shaft 103. During the forward jacking process, every time the pipe jacking machine 100 is jacked forward a certain distance, the contact end face between the pipe jacking machine 100 and the tool pipe 105 should be checked to prevent misalignment.

[0047] When the pipe jacking machine 100 gradually advances to the receiving shaft 103, the inspection frequency and accuracy should be strengthened to ensure that the pipe jacking machine 100 can be accurately received. The inspection before the pipe jacking machine 100 penetrates mainly includes rechecking the orientation of the pipe jacking machine 100, confirming the state of the pipe jacking machine 100, and evaluating the attitude of the pipe jacking machine 100 when it is received, so that the pipe jacking machine 100 is always implemented according to the predetermined plan during the construction of this stage, and is received in a good attitude and correctly and accurately settled on the receiving base of the receiving shaft 103.

[0048] An anti-jacking back wall 102 is installed in the receiving shaft 103. The anti-jacking back wall 102 is arranged facing the pipe jacking machine 100. The anti-jacking back wall 102 is poured with C40 concrete. In construction step (3), the rear end of the anti-jacking cylinder 104 presses against the anti-jacking back wall 102, and the front end of the anti-jacking cylinder 104 is arranged facing the pipe jacking machine 100.

[0049] The support 110 of the anti-jacking cylinder 104 is installed in front of the anti-jacking back wall 102. The transverse width of the anti-jacking back wall 102 should be able to ensure that the jacking force transmitted by the anti-jacking system acts accurately on the anti-jacking back wall 102.

[0050] An anti-jacking track 111 is provided at the bottom of the receiving shaft 103. The anti-jacking track 111 extends in the direction of the pipe jacking machine 100. In construction step (3), the tool pipe 105 and the pipe section 101 are installed on the anti-jacking track 111. Under the reverse jacking action of the anti-jacking cylinder 104, the tool pipe 105 and the pipe section 101 move along the anti-jacking track 111 towards the pipe jacking machine 100.

[0051] The anti-jacking cylinder 104 is an equal-thrust double-stage cylinder with a stroke of 2.5 m, a jacking force of 2500 KN for a single cylinder, and a maximum propulsion speed of 100 mm / min. The number of cylinders installed is selected according to the total jacking force.

[0052] The anti-jacking track 111 must meet the requirements of the elevation and slope of the tool pipe 105 and the pipe section 101, and the installation requirements are straight, parallel, firm and reliable, and no displacement shall occur during use.

[0053] The outer surfaces of the tool pipe 105 and the pipe section 101 are respectively coated with a drag reducer for reducing resistance, and the drag reducer used is paraffin.

[0054] Process of making and using drag reducer: Use a broom to clean the soil on the outer walls of the tool pipe 105 and the pipe section 101 to ensure the permeability of the capillary pores on the outer walls of the tool pipe 105 and the pipe section 101. Place the iron pot for melting paraffin on the stove, and place an iron washer in the iron pot. Put a certain amount of No. 60 fully refined solid paraffin in the iron bucket, and place the iron bucket on the washer in the iron pot. Put a certain amount of clean water in the iron pot. When the water temperature rises to 50 - 70 degrees, use a stirring rod to stir the paraffin in the iron bucket to completely melt the paraffin. Dip a brush in the melted paraffin and evenly apply it on the surfaces of the outer walls of the tool pipe 105 and the pipe section 101. After the upper part of the outer walls of the tool pipe 105 and the pipe section 101 is coated and cooled, rotate the tool pipe 105 and the pipe section 101, and brush the lower part of the outer walls of the tool pipe 105 and the pipe section 101 until the entire tool pipe 105 and the pipe section 101 are completely coated. Use a liquefied gas torch to re - melt the paraffin on the outer walls of the tool pipe 105 and the pipe section 101 to make it penetrate into the capillary pores of the outer walls of the tool pipe 105 and the pipe section 101. After the re - melted paraffin cools to room temperature, the tool pipe 105 and the pipe section 101 can be lowered into the well for reverse jacking construction.

[0055] There is a jacking gap 112 between the outer surface of the pipe section 101 and the soil mass. There are grouting holes 113 provided in the side wall of the pipe section 101, and the grouting holes 113 communicate with the inside of the pipe section 101 and the jacking gap 112.

[0056] In construction step (3), during the process of the reverse jacking oil cylinder 104 reverse - jacking the tool pipe 105 and the pipe section 101, drag - reducing slurry for reducing resistance is injected into the jacking gap 112 through the grouting holes 113.

[0057] Inject drag - reducing slurry into the jacking gap 112 through the grouting holes 113 on the outer wall of the pipe section 101. Use multi - point symmetric injection to evenly fill the drag - reducing slurry in the jacking gap 112 to reduce the frictional resistance between the pipe section 101 and the soil mass, achieving the effect of reducing the reverse jacking resistance. Set a grouting hole 113 every 6 - 8m. Each grouting hole 113 includes 3 grouting holes 113. The size of the grouting hole 113 is 1 inch. The output pressure of the grouting pump is controlled at 0.3 - 0.4MPa. The density of the drag - reducing slurry should be maintained between 1.02 - 1.15, the apparent viscosity ≥ 30mPa·S, the API standard water loss ≤ 20ml, and the Marsh funnel viscosity should be greater than 30S. The grouting sequence is: making slurry on the ground → full hydration in the slurry storage tank → starting the grouting pump → opening the slurry delivery valve → delivering slurry (reverse jacking starts) → closing the valve of the pipe section 101 (jacking stops) → closing the main pipe valve → disassembling the quick connector in the well → lowering the pipe section 101 → extending the main pipe → cyclic construction.

[0058] In construction step (5), during the process of the jacking cylinder 109 pushing the docked tool pipe 105, pipe segment 101 and pipe jacking machine 100 forward to the receiving well 103, each time the receiving well 103 receives a pipe segment 101, the pipe segment 101 is promptly hoisted out and transported to the launching well 108 for reuse until all the pipe segments 101 in front of the pipe jacking machine 100 are pushed out to the receiving well 103.

[0059] The specific steps of forward jacking are as follows: Pre-adjust the main jack auxiliary equipment such as the hydraulic pump station for forward jacking, install the pipe segments 101 for forward jacking. After the pipe for reverse jacking is docked with the pipe jacking machine 100, start the forward jacking system in the launching well 108 for forward jacking. Each time a pipe segment 101 is pushed out by the receiving well 103, the pipe segment 101 is promptly hoisted out of the well and transported to the launching well 108 for reuse until all the pipe segments 101 in front of the pipe jacking machine 100 are pushed out to the receiving well 103 and hoisted out of the well. During the forward jacking process, each time a pipe segment 101 is jacked, the contact end face situation between the pipe jacking machine 100 and the tool pipe 105 should be checked to prevent offset.

[0060] An elastic ring 114 is provided on the pipe jacking surface 115. The elastic ring 114 is arranged in a circumferential direction along the pipe jacking surface 115. The blade 106 extends towards the docking end face 107 to the outside of the elastic ring 114. In construction step (4), after the tool pipe 105 jacks to the position of the pipe jacking machine 100, the reverse jacking cylinder 104 stops reverse jacking, docks the tool pipe 105 with the pipe jacking machine 100, and the elastic ring 114 of the pipe jacking machine 100 fits and abuts against the docking end face 107 of the tool pipe 105.

[0061] The elastic ring 114 has the function of storing energy. When the tool pipe 105 is docked with the pipe jacking machine 100, the elastic ring 114 deforms under the extrusion of the docking end face 107. The kinetic energy of the tool pipe 105 is converted into the elastic potential energy of the elastic ring 114. The elastic potential energy stored in the elastic ring 114 is slowly released, and the elastic ring 114 alleviates the impact force of the tool pipe 105 on the pipe jacking machine 100, avoiding damage to the tool pipe 105 and the pipe jacking machine 100 when the tool pipe 105 is docked with the pipe jacking machine 100.

[0062] The elastic ring 114 has a number of blade grooves 116 which are evenly distributed around the center of the elastic ring 114. The blade 106 is located within the blade groove 116. The blade 106 is longitudinally arranged within the blade groove 116. The bottom of the blade 106 is fixedly connected to the bottom of the blade groove 116. The top of the blade 106 faces the docking end face 107. The lower half of the blade 106 is placed within the elastic ring 114, and the upper half of the blade 106 is exposed outside the elastic ring 114. During the jacking process of the pipe jacking machine 100, the part of the blade 106 exposed outside the elastic ring 114 functions to cut the soil mass. The docking end face 107 has a number of blade slots 124 which are arranged corresponding to the blades 106.

[0063] In construction step (4), when the tool pipe 105 docks with the pipe jacking machine 100, the elastic ring 114 is gradually deformed under the extrusion of the docking end face 107, and the part of the blade 106 exposed outside the elastic ring 114 gradually increases. The part of the blade 106 exposed outside the elastic ring 114 inserts into the inside of the blade slot 124 of the docking end face 107.

[0064] The elastic ring 114 is provided with a number of engaging grooves 117 which are evenly distributed around the center of the elastic ring 114. The engaging groove 117 has an engaging groove opening facing the docking end face 107. A rotating bar 122 is rotatably connected within the engaging groove 117. A rotating shaft 118 is passed through the central position of the rotating bar 122. The rotating bar 122 rotates around the rotating shaft 118. Both ends of the rotating shaft 118 are each connected with a support piece 123. The support piece 123 is arranged perpendicular to the bottom of the engaging groove 117. The upper part of the support piece 123 is fixedly connected to the end of the rotating shaft 118, and the lower part of the support piece 123 is fixedly connected to the bottom of the engaging groove 117. The rotating bar 122 extends outwards with an engaging bar 119 which is arranged towards the pipe jacking machine 100. The side surface of the tool pipe 105 has a bayonet slot 120. Along the direction of the pipe jacking machine 100 towards the tool pipe 105, the engaging bar 119 is arranged obliquely outwards. The rotating bar 122 and the engaging bar 119 are placed inside the engaging groove 117.

[0065] In construction step (4), when the tool pipe 105 docks with the pipe jacking machine 100, when the docking end face 107 docks with the elastic ring 114, the docking end face 107 presses against the elastic ring 114 to cause compression deformation, and the engaging bar 119 extends out of the engaging groove opening. The engaging bar 119 is located outside the side wall of the tool pipe 105. As the elastic ring 114 docks with the docking end face 107, the engaging bar 119 gradually swings inwards, and the engaging bar 119 gradually approaches the bayonet slot 120 until the engaging bar 119 is inserted into the bayonet slot 120.

[0066] After the engaging bar 119 is inserted into the bayonet slot 120, the bayonet slot 120 functions to limit the position of the engaging bar 119, and the tool pipe 105 and the pipe jacking machine 100 are relatively fixed and not easily separated.

[0067] The pressing bar 121 extends from the rotating bar 122 towards the center of the elastic ring 114, and the pressing bar 121 is inclined towards the butting end face 107.

[0068] In the construction step (4), when the butting end face 107 is butted with the elastic ring 114, the elastic ring 114 is gradually compressed and deformed under the extrusion of the butting end face 107. The butting end face 107 approaches the pressing bar 121 inside the elastic ring 114. The pressing bar 121 inside the elastic ring 114 swings towards the pipe jacking face 115 under the extrusion of the butting end face 107. The rotating bar 122 rotates towards the pipe jacking face 115 accordingly, and the engaging bar 119 swings towards the bayonet slot 120 accordingly until the bottom of the pressing bar 121 fits the pipe jacking face 115 and the engaging bar 119 is completely embedded in the bayonet slot 120.

[0069] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A mud-water balance pipe jacking machine escape construction method, characterized in that: It includes the following construction steps: (1) Confirm the trapped position of the pipe jacking machine and calculate and analyze the force condition of the pipe jacking machine; (2) According to the axis attitude, geological conditions and surrounding environment of the pipe jacking machine, judge the conditions for jacking the pipe jacking machine in the reverse direction. If the conditions are met, set up a receiving well. Along the jacking direction of the pipe jacking machine, the receiving well is located in front of the pipe jacking machine and is arranged directly opposite to the jacking direction of the pipe jacking machine; (3) Install a reverse jacking oil cylinder, a tool pipe and pipe sections in the receiving well. The reverse jacking oil cylinder presses against the pipe section in the reverse direction, and the pipe section presses against the tool pipe and jacks it into the soil. The jacking axis of the tool pipe is coaxially arranged with the axis of the pipe jacking machine; (4) When the tool pipe jacks to the position of the pipe jacking machine, the reverse jacking oil cylinder stops reverse jacking, and the tool pipe is docked with the pipe jacking machine; The pipe jacking machine has a pipe jacking surface facing the tool pipe. Blades for cutting soil are provided on the pipe jacking surface. The tool pipe has a docking end face facing the pipe jacking machine. When the tool pipe is docked with the pipe jacking machine, the blades are inserted into the interior of the docking end face; (5) The forward jacking oil cylinder placed in the launching well jacks the pipe jacking machine forward until the pipe jacking machine is jacked into the receiving well; The pipe jacking surface is provided with an elastic ring. The elastic ring is arranged in a circumferential direction around the pipe jacking surface. The blades extend towards the docking end face to the outside of the elastic ring. In the construction step (4), when the tool pipe is docked with the pipe jacking machine, the elastic ring is in close contact with the docking end face; The elastic ring has a number of blade grooves. The number of blade grooves are evenly distributed around the center of the elastic ring. The blades are located in the blade grooves. The docking end face has a number of knife edge grooves corresponding to the blades; In the construction step (4), when the tool pipe is docked with the pipe jacking machine, the blades are inserted into the knife edge grooves; The elastic ring is provided with a number of engaging grooves. The number of engaging grooves are evenly distributed around the center of the elastic ring. The engaging groove has an engaging groove opening facing the docking end face. A rotating bar is rotatably connected inside the engaging groove. The rotating bar extends outwards with an engaging bar facing the pipe jacking machine. The side of the tool pipe has a bayonet groove. Along the direction of the pipe jacking machine towards the tool pipe, the engaging bar is arranged obliquely outwards. The rotating bar and the engaging bar are placed inside the engaging groove; In the construction step (4), when the docking end face is docked with the elastic ring, the docking end face presses against the elastic ring to cause compression deformation. The engaging bar extends out of the engaging groove opening, and the engaging bar gradually swings inwards until the engaging bar is embedded in the bayonet groove; 2. The method for escaping a mud-water balanced pipe jacking machine according to claim 1, characterized in that: A reverse jacking back wall is installed in the receiving well. The reverse jacking back wall faces the pipe jacking machine. In the construction step (3), the rear end of the reverse jacking oil cylinder presses against the reverse jacking back wall, and the front end of the reverse jacking oil cylinder faces the pipe jacking machine.

3. The method for escaping a mud-water balanced pipe jacking machine according to claim 1, characterized in that: An anti - jacking track is provided at the bottom of the receiving well. The anti - jacking track extends towards the direction of the pipe - jacking machine. In the construction step (3), the tool pipe and the pipe segments are installed on the anti - jacking track. Under the reverse jacking action of the anti - jacking oil cylinders, the tool pipe and the pipe segments move along the anti - jacking track towards the pipe - jacking machine.

4. The construction method for the mud-water balance pipe jacking machine to get out of trouble according to any one of claims 1 to 3, characterized in that, The outer surfaces of the tool pipe and the pipe segments are respectively coated with a drag - reducing agent for reducing resistance.

5. The construction method for the mud-water balance pipe jacking machine to get out of trouble according to any one of claims 1 to 3, characterized in that, There is a jacking gap between the outer surface of the pipe segment and the soil body. Grouting holes are provided in the side wall of the pipe segment, and the grouting holes communicate with the inside of the pipe segment and the jacking gap. In the construction step (3), during the process of the anti - jacking oil cylinders jacking the tool pipe and the pipe segments in the reverse direction, drag - reducing slurry for reducing resistance is injected into the jacking gap through the grouting holes.

6. The method for escaping a mud-water balanced pipe jacking machine according to any one of claims 1 to 3, characterized in that: In the construction step (5), during the process of the forward - jacking oil cylinders pushing the docked tool pipe, pipe segments and pipe - jacking machine empty to the receiving well, each time the receiving well receives a pipe segment, the pipe segment is promptly hoisted out and transported to the launching well for reuse until all the pipe segments in front of the pipe - jacking machine are pushed out to the receiving well.

7. The construction method for the mud-water balance pipe jacking machine to get out of trouble according to any one of claims 1 to 3, characterized in that, The rotating bar extends towards the center of the elastic ring with a pressure - receiving bar. The pressure - receiving bar is inclined towards the docking end face. In the construction step (4), when the docking end face is docked with the elastic ring, the docking end face presses against the elastic ring to cause compression deformation. The pressure - receiving bar inside the elastic ring swings towards the pipe - jacking face under the extrusion of the tool pipe. The rotating bar rotates towards the pipe - jacking face accordingly, and the engaging bar swings towards the bayonet slot accordingly until the bottom of the pressure - receiving bar fits the pipe - jacking face and the engaging bar is completely embedded in the bayonet slot.

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