Pipe jacking grouting device and construction method

Abstract

The invention discloses a pipe-jacking grouting device which comprises a mounting pipe, a grouting device and a grouting device. A plurality of mounting grooves are formed in the outer wall of the mounting pipe at intervals, and a mounting hole is formed in each mounting groove; each arc-shaped plate is clamped in the corresponding mounting groove and is in sliding connection with the mounting groove, each arc-shaped plate comprises an arc-shaped cavity and an arc-shaped push plate arranged on the outer side of the arc-shaped cavity, a plurality of grout outlet holes are formed in one end of each arc-shaped cavity, and the arc-shaped push plates and the arc-shaped cavities are connected through elastic connecting plates and define an air bag; each grouting assembly comprises a grouting pipe, and an air valve, a grouting hole, a gas channel and a grouting channel on the grouting pipe are communicated; and the multiple driving assemblies are arranged in one-to-one correspondence with the grouting assemblies and used for driving the grouting assemblies to move, driving the arc-shaped plates to stretch out of the mounting grooves, driving the grouting pipes to penetrate through the arc-shaped cavities to stretch into the air bags and enabling the grouting holes to be located in the arc-shaped cavities and the air valves to be located in the air bags. The invention has the advantages that the slurry outlet holes are not easy to block, the slurry sleeve is uniformly distributed, and the number of mounting holes is small.

Description

Technical Field

[0001] The present invention relates to the field of pipe jacking construction, and more specifically, to a pipe jacking grouting device and a construction method. Background Art

[0002] Pipe jacking construction is a tunnel construction method commonly used in underground projects. It has the advantages of simple operation, little impact on the surrounding environment, and high construction safety. During the pipe jacking construction process, in order to reduce the friction between the pipe and the soil, it is necessary to inject thixotropic mud into the gap between the pipe wall and the soil to form a mud sleeve on the pipe wall. The quality of grouting directly affects the project progress and construction quality.

[0003] The existing grouting device generally sets a plurality of grouting holes at intervals along the circumference of the pipe wall, inserts a grouting pipe into the grouting hole, and directly injects thixotropic mud into the gap between the pipe wall and the soil through the grouting pipe. With the above grouting device, firstly, the grouting pipe is exposed to the outside, and the grouting hole is easily blocked by collapsed soil. Secondly, in order to improve the uniformity of grouting, it is necessary to open enough grouting holes in the pipe wall. Summary of the invention

[0004] The object of the present invention is to provide a pipe grouting device to at least solve the above problems.

[0005] In order to achieve the purpose and other advantages of the present invention, a top pipe grouting device is provided, comprising: a mounting tube, wherein the outer wall of the middle portion is provided with a plurality of mounting grooves at intervals along its circumference, each mounting groove is provided with at least two mounting holes at intervals, each mounting hole is arranged along the radial direction of the mounting tube and is internally connected; a plurality of arc plates, which are arranged one by one corresponding to the plurality of mounting grooves, each arc plate is clamped in the mounting groove and is slidably connected to the mounting groove along the radial direction of the mounting tube, the arc plate comprises an arc-shaped cavity and an arc-shaped push plate provided on the outside thereof, an end of the arc-shaped cavity close to the tail of the mounting tube is provided with a plurality of slurry outlet holes at intervals along its circumference, the inner side edge of the arc-shaped push plate is fixedly connected to the outer side of the arc-shaped cavity by an elastic connecting plate, The arc-shaped push plate, the elastic connecting plate and the arc-shaped cavity together form an air bag; a plurality of grouting components, a grouting component is correspondingly arranged in each mounting hole, each grouting component includes a grouting pipe, and an upper part of the side wall thereof is provided with an air valve and a grouting hole in sequence from top to bottom, and the air valve and the grouting hole are respectively connected with the gas channel and the grouting channel arranged inside the grouting pipe; a plurality of driving components, a driving component is correspondingly arranged for each grouting component, and the driving component is used to drive the grouting component to move along the radial direction of the mounting pipe and drive the arc-shaped plate to move up and extend out of the mounting groove, and at the same time, the grouting pipe moves up through the arc-shaped cavity and extends into the air bag and drives the arc-shaped push plate to move up, so that the grouting hole is located in the arc-shaped cavity, and the air valve is located in the air bag.

[0006] Preferably, in the jacking pipe grouting device, the grouting assembly includes a first connecting pipe sleeve, the upper portion of which extends into the mounting hole and is threadedly connected to the mounting pipe sleeve pre-buried therein; a first bearing, which extends into the first connecting pipe sleeve and is threadedly connected thereto; an outer sleeve, which extends into the first bearing and is splined to its inner ring, the top outer wall of the outer sleeve being threadedly connected to a second connecting sleeve preset on the inner side surface of the arc-shaped cavity; a grouting pipe, which is slidably arranged in the outer sleeve, a damping rubber is arranged between the grouting pipe and the outer sleeve, and the bottom of the grouting pipe is connected to a grouting pipe arranged in the mounting pipe via a telescopic pipe; wherein the outer sleeve and the grouting pipe are driven by the driving assembly to move radially along the mounting pipe.

[0007] Preferably, in the jacking pipe grouting device, the driving assembly includes a first mounting plate, which is rotatably connected to the bottom outer wall of the outer sleeve via a second bearing, a second mounting plate, which is fixed to the bottom outer wall of the grouting pipe, a pair of L-shaped support plates, which are symmetrically arranged on both sides of the first mounting plate, and the vertical end of each L-shaped support plate is fixedly connected to the mounting pipe, two linear drives, which are respectively vertically arranged on the horizontal ends of the pair of L-shaped support plates, and the output end of each linear drive is detachably connected to the first mounting plate via a connecting ear plate, and two pulleys, which are symmetrically arranged on the first mounting plate, and a driving rope is wound around each pulley, one end of the driving rope is detachably connected to the horizontal end of the L-shaped support plate, and the other end is detachably connected to the second mounting plate.

[0008] Preferably, in the jacking pipe grouting device, the inner wall of the outer sleeve is provided with at least two guide grooves spaced apart along its circumference, each guide groove is arranged along the axial direction of the outer sleeve, and a plurality of sliders are slidably mounted in each guide groove along its length direction, a spring is provided between two adjacent sliders, and the slider located at the bottom is fixedly connected to the outer wall of the grouting pipe.

[0009] Preferably, in the jacking pipe grouting device, a first limiting ring is fixedly provided at the bottom of the outer ring of the first bearing, and a second limiting ring is fixedly provided at the top of the outer ring of the second bearing.

[0010] Preferably, in the jacking pipe grouting device, a plug-in ring is fixedly provided at the head end of the installation pipe, and a receiving groove cooperating with the plug-in ring is provided at the tail end.

[0011] Preferably, in the jacking pipe grouting device, the elastic connecting plate is a rubber corrugated plate with a corrugated cross-section.

[0012] The present invention also provides a pipe jacking grouting construction method, which uses the above-mentioned pipe jacking grouting device to perform construction operations, comprising: Step 1: Install the installation pipe between the pipe jacking machine and the next section of the pipe; Step 2: According to the construction requirements, the driving assembly is started, and the arc plate is driven to move up and extend out of the installation groove through the driving assembly. At the same time, the grouting pipe moves up through the arc cavity and extends into the airbag to drive the arc push plate to move up; Step 3: Fill the air bag with air through the air channel and the air valve, so that the arc-shaped push plate pushes outwards evenly to squeeze the soil around the installation pipe; Step 4: injecting bentonite slurry into the arc-shaped cavity through the grouting channel and the grouting hole, and the bentonite slurry flows out through the slurry outlet hole to form a slurry sleeve on the installation pipe wall; Step 5: After the jacking is completed, the air in the airbag is discharged through the gas channel and the air valve, the grouting assembly and the drive assembly are removed, and the arc cavity and the installation hole are sealed.

[0013] The present invention has at least the following beneficial effects: The present invention improves the structures of the arc plate and the grouting pipe, and arranges the arc plate to include an arc cavity, an arc push plate and an air bag surrounded by the arc cavity, the arc push plate and an elastic connecting plate; a plurality of slurry outlet holes are arranged at intervals at one end of the arc cavity close to the tail of the mounting pipe; an air valve, a grouting hole, a gas channel and a grouting channel are arranged on the grouting pipe to be connected; and the arc plate and the grouting pipe are driven to move by a driving assembly; during the grouting process, firstly, the arc push plate can be driven to move toward the outside of the mounting pipe through the grouting pipe and the inflation of the air bag, so as to push and squeeze the soil located outside the mounting pipe, thereby reinforcing the soil outside the mounting pipe and preventing the soil from collapsing and blocking the slurry outlet holes; secondly, the arc cavity can be used as a collecting chamber, and after the bentonite slurry injected by the grouting pipe is collected, it is evenly dispersed and discharged through the plurality of slurry outlet holes connected with the arc cavity, so that the slurry sleeve formed on the outer wall of the mounting pipe is more uniform; thirdly, the number of mounting holes on the mounting pipe can be reduced.

[0014] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of a pipe grouting device according to an embodiment of the present invention; Figure 2 is a schematic diagram of a radial cross-sectional structure of a pipe grouting device in an initial state according to an embodiment of the present invention; Figure 3 yes Figure 2 A magnified view of the part A in the middle; Figure 4 It is a schematic diagram of the radial cross-sectional structure of a pipe grouting device in an expanded state according to an embodiment of the present invention; Figure 5 yes Figure 4 A magnified view of the part B in the middle; Figure 6 It is a schematic diagram of a partial axial cross-sectional structure of a pipe grouting device in an initial state according to an embodiment of the present invention. DETAILED DESCRIPTION

[0016] The present invention is further described in detail below in conjunction with embodiments and drawings so that those skilled in the art can implement the invention with reference to the description.

[0017] It should be understood that terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0018] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials are commercially available unless otherwise specified; in the description of the present invention, the terms "lateral", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0019] like Figure 1 to Figure 6As shown, the present invention provides a jacking pipe grouting device, comprising: a mounting pipe 1, wherein a plurality of mounting grooves 2 are provided on the outer wall thereof at intervals along its circumference, each mounting groove 2 is provided with at least two mounting holes at intervals, each mounting hole is arranged along the radial direction of the mounting pipe 1 and is connected to the inside thereof; a plurality of arc plates, which are arranged one by one corresponding to the plurality of mounting grooves 2, each arc plate is clamped in the mounting groove 2 and is slidably connected to the mounting groove 2 along the radial direction of the mounting pipe 1, the arc plate comprises an arc-shaped cavity 3 and an arc-shaped push plate 4 provided on the outside thereof, a plurality of slurry outlet holes 5 are provided at intervals along its circumference at one end of the arc-shaped cavity 3 close to the tail of the mounting pipe, the inner side edge of the arc-shaped push plate 4 is fixedly connected to the outer side of the arc-shaped cavity 3 by an elastic connecting plate 6, the arc-shaped push plate 4, the elastic connecting plate 6 and the The arc-shaped cavity 3 is surrounded by an air bag 7; a plurality of grouting components, one grouting component is correspondingly arranged in each mounting hole, each grouting component includes a grouting pipe 8, and an air valve and a grouting hole are arranged on the upper part of the side wall from top to bottom, and the air valve and the grouting hole are respectively connected with the gas channel and the grouting channel arranged inside the grouting pipe 8; a plurality of driving components, one driving component is correspondingly arranged for each grouting component, and each driving component is arranged on both sides of the grouting component in the mounting tube 1, and the driving component is used to drive the grouting component to move along the radial direction of the mounting tube 1 and drive the arc plate to move up and extend out of the mounting groove 2. At the same time, the grouting pipe 8 moves up through the arc cavity 3 and extends into the air bag 7 and drives the arc push plate 4 to move up, so that the grouting hole is located in the arc cavity 3, and the air valve is located in the air bag 7.

[0020] In the above embodiment, the jacking pipe grouting device includes a mounting pipe 1, a plurality of arc-shaped plates, a plurality of grouting assemblies and a plurality of drive assemblies. The mounting pipe 1 is preferably a prefabricated concrete pipe, and a plurality of mounting grooves 2 are provided on the mounting pipe 1, and the plurality of mounting grooves are arranged on the outer wall of the middle part of the mounting pipe 1 along the circumference of the mounting pipe 1, and at least two mounting holes are arranged in the mounting groove 2 at intervals, and the two mounting holes can be arranged at intervals along the axial direction of the mounting pipe 1, or can be arranged at intervals along the circumference of the mounting pipe 1, and are determined according to the inner diameter of the mounting pipe 1, so that when the drive assembly is subsequently installed, it is preferable that two adjacent drive assemblies do not interfere with each other, but each mounting hole must be arranged along the radial direction of the mounting pipe 1 and communicate with the inside of the mounting pipe 1. A plurality of arc plates are slidably and correspondingly arranged in the mounting groove 2, and can slide radially along the mounting tube 1, each arc plate comprises an arc cavity 3 and an arc push plate 4, the arc cavity 3 is an arc plate structure with a cavity inside, the arc push plate 4 is arranged on the outside of the arc cavity 3, that is, the side of the arc cavity 3 away from the mounting hole, the arc push plate 4 and the arc cavity 3 are connected by an elastic connecting plate 6, the arc push plate 4, the arc cavity 3 and the elastic connecting plate 6 together form an air bag, so that the distance between the arc push plate 4 and the arc cavity 3 is adjustable, in the initial state, the arc push plate 4 is arranged in the mounting groove 2, and the outer side surface of the arc push plate 4 and the outer wall of the mounting tube 1 are located on the same curved surface, the slurry outlet hole 5 on the arc cavity 3 is located in the mounting groove 2 and abuts against the inner wall of the mounting groove 2. A plurality of grouting components are respectively inserted into the mounting holes in a one-to-one manner, and each grouting component comprises a grouting pipe 8. The upper part of the side wall of the grouting pipe 8 is provided with an air valve and a grouting hole in sequence from top to bottom. The air valve and the grouting hole are respectively connected with the gas channel and the grouting channel arranged inside the grouting pipe 8. The other end of the gas channel is connected with the air compressor and / or the vacuum pump arranged in the mounting pipe 1 through the air pipe, and the other end of the grouting channel is connected with the slurry delivery pipe 15 arranged in the mounting pipe 1 through the telescopic pipe 14. Preferably, the air valve comprises an inlet valve and an exhaust valve. The inlet valve is connected with the air outlet of the air compressor through the inlet channel and the inlet pipe, and the exhaust valve is connected with the air inlet of the vacuum pump through the exhaust channel and the exhaust pipe. Multiple driving components are arranged one by one on both sides of the grouting component. The driving components include but are limited to cylinders and linear drivers. The driving components are used to drive the grouting component to move radially along the mounting tube 1 and drive the arc plate to move up and extend out of the mounting groove 2. At the same time, the grouting pipe 8 is driven to move upward through the arc cavity 3 to extend into the air bag 7 and drive the arc push plate 4 to move upward until the grouting hole on the grouting pipe 8 is located in the arc cavity 3 and the air valve is located in the air bag 7.

[0021] When in use, the grouting assembly and the grouting pipe 8 are first driven to move by the driving assembly, and the grouting assembly drives the arc plate to move up and extend out of the installation groove 2, so that the slurry outlet hole 5 provided on the arc cavity 3 is exposed to the outside of the installation pipe 1. At the same time, the grouting pipe 8 drives the arc push plate 4 to move up, so that the distance between the arc push plate 4 and the arc cavity 3 is increased, and the grouting hole on the grouting pipe 8 is located in the arc cavity 3, and the air valve is located in the air bag 7. Then, the air compressor provided in the installation pipe 1 is used to inflate the air bag 7 through the air pipe, the air channel and the air valve, so that the distance between the arc push plate 4 and the arc cavity 3 is further increased, so that the arc push plate 4 pushes outward evenly to squeeze the soil on the periphery of the installation pipe. The body is reinforced, and bentonite slurry is then injected into the arc-shaped cavity 3 through the grouting pipe 15, the telescopic pipe 14, the grouting channel and the grouting hole. After the bentonite slurry is collected through the arc-shaped cavity 3, it is evenly dispersed and discharged through a plurality of slurry outlet holes 5 provided at one end of the arc-shaped cavity 3 close to the tail of the mounting pipe 1, so that the bentonite slurry forms a uniform mud sleeve on the outer wall of the mounting pipe 1. After the grouting is completed, the air bag 7 is first evacuated through the air pipe, the air channel and the air valve by a vacuum pump provided in the mounting pipe 1, and then the grouting assembly and the grouting pipe 8 are driven to reset by the driving assembly, and then the grouting assembly and the driving assembly are removed, and the arc-shaped cavity 3 and the mounting hole are blocked.

[0022] The present invention improves the structure of the arc plate and the grouting pipe 8, and sets the arc plate to include an arc cavity 3, an arc push plate 4 and an air bag 7 surrounded by the arc cavity 3, the arc push plate 4 and the elastic connecting plate 6. A plurality of grouting holes 5 are arranged at intervals at one end of the arc cavity 3 close to the tail of the mounting tube 1. An air valve, a grouting hole, a gas channel and a grouting channel are connected on the grouting pipe 8. The arc plate and the grouting pipe 8 are driven to move by a driving component. During the grouting process, the grouting pipe 8 can be used to pass through the grouting pipe 8. The first is to inflate the airbag 7 to drive the arc push plate 4 to move toward the outside of the mounting tube 1, push and squeeze the soil located outside the mounting tube 1, thereby reinforcing the soil outside the mounting tube 1, so that the soil is not easy to collapse and block the slurry outlet holes; the second is that the arc cavity 3 can be used as a collecting cavity, after the bentonite slurry injected by the grouting pipe 8 is collected, it is evenly dispersed and discharged through a plurality of slurry outlet holes 5 connected to the arc cavity 3, so that the slurry sleeve formed on the outer wall of the mounting tube 1 is more uniform; the third is that the number of mounting holes on the mounting tube can be reduced.

[0023] In another embodiment, the grouting assembly includes a first connecting sleeve 9, the upper part of which extends into the mounting hole and is threadedly connected to the mounting sleeve 10 embedded therein; a first bearing 11, which extends into the first connecting sleeve 9 and is threadedly connected thereto; an outer sleeve 12, which extends into the first bearing 11 and is splined to its inner ring, and the top outer wall of the outer sleeve 12 is threadedly connected to a second connecting sleeve 13 preset on the inner side surface of the arc-shaped cavity 3; a grouting pipe 8, which is slidably arranged in the outer sleeve 12, and a damping rubber is provided between the grouting pipe 8 and the outer sleeve 12, and the bottom of the grouting pipe 8 is connected to a grouting pipe 15 arranged in the mounting pipe 1 through a telescopic tube 14; wherein, the outer sleeve 12 and the grouting pipe 8 are driven by the driving assembly to move radially along the mounting pipe 1.

[0024] In the above embodiment, the grouting assembly preferably includes a first connecting sleeve 9, a first bearing 11, an outer sleeve 12 and a grouting pipe 8. The grouting pipe 8 is slidably sleeved in the outer sleeve 12, the outer sleeve 12 is splined to the inner ring of the first bearing 11, and the outer ring of the first bearing 11 is threadedly connected to the first connecting sleeve 9, so that the components of the grouting assembly are connected to form a whole, and after the connection, the rotation of the first connecting sleeve 9 and the outer sleeve 12 is not affected. The top outer wall of the outer sleeve 12 is threadedly connected to the second connecting sleeve 13 preset on the inner side of the arc-shaped cavity 3, and the upper part of the first connecting sleeve 9 is threadedly connected to the mounting sleeve 10 pre-buried in the mounting hole, so that the grouting assembly is fixed in the mounting hole through the second connecting sleeve 13 and the first connecting sleeve 9, and the threaded connection method is stable and easy to disassemble and assemble.

[0025] In another embodiment, the drive assembly includes a first mounting plate 16, which is rotatably connected to the bottom outer wall of the outer sleeve 12 through a second bearing 17, a second mounting plate 18, which is fixed to the bottom outer wall of the grouting pipe 8, a pair of L-shaped support plates 19, which are symmetrically arranged on both sides of the first mounting plate 16, and the vertical end of each L-shaped support plate 19 is fixedly connected to the mounting tube 1, two linear drives 20, which are respectively vertically arranged on the horizontal ends of the pair of L-shaped support plates 19, and the output end of each linear drive 20 is detachably connected to the first mounting plate 16 through a connecting ear plate 21, and two pulleys 22, which are symmetrically arranged on the first mounting plate 16, and a driving rope 23 is wound around each pulley 22, one end of the driving rope 23 is detachably connected to the horizontal end of the L-shaped support plate 19, and the other end is detachably connected to the second mounting plate 18.

[0026] In the above embodiment, the driving assembly preferably includes a first mounting plate 16, a second bearing 17, a second mounting plate 18, an L-shaped support plate 19, a linear drive 20, a pulley 22 and a driving rope 23. The first mounting plate 16 is rotatably connected to the bottom outer wall of the outer sleeve 12 through the second bearing 17 so as not to affect the threaded connection between the outer sleeve 12 and the second connecting sleeve 13; the linear drive 20 includes but is not limited to a cylinder or an electric push rod. When in use, the linear drive 20 drives the first mounting plate 16 to move toward the outside of the mounting tube 1 through the connecting ear plate 21, the first mounting plate 16 drives the outer sleeve 12 and the pulley 22 to move synchronously, the outer sleeve 12 drives the arc plate as a whole to move toward the outside of the mounting tube 1 through the second connecting sleeve 13, and at the same time, the pulley 22 drives the grouting pipe 8 to move toward the outside of the mounting tube 1 through the driving rope 23, and the moving distance of the grouting pipe 8 is greater than the moving distance of the outer sleeve 12, so that the grouting pipe 8 can extend into the airbag 7 through the arc cavity 3.

[0027] Furthermore, the number of pulleys 22 can be adjusted according to the radial length of the mounting groove 2 and the arc-shaped cavity 3 along the mounting tube 1, such as arranging a plurality of pulleys 22 in parallel on each first mounting plate, and connecting one end of the driving rope 23 to the horizontal end of the L-shaped support plate 19, and the other end of the driving rope 23 is connected to the second mounting plate 18 by passing through the plurality of pulleys 22 in turn, so as to adjust the moving distance difference between the grouting pipe 8 and the outer sleeve 12, and ensure that when the outer sleeve 12 drives the arc plate to extend out of the mounting groove 2, the grouting pipe 8 can pass through the arc-shaped cavity 3 and extend into the airbag 7, and the grouting hole on the grouting pipe 8 is located in the arc-shaped cavity 3, and the air valve is located in the airbag 7.

[0028] In another embodiment, the inner wall of the outer sleeve 12 is provided with at least two guide grooves spaced apart along its circumference, each guide groove is arranged along the axial direction of the outer sleeve 12, and a plurality of sliders are slidably arranged in each guide groove along its length direction, a spring is provided between two adjacent sliders, and the slider located at the bottom is fixedly connected to the outer wall of the grouting pipe 8.

[0029] In the above embodiment, a guide groove is added to the inner wall of the outer sleeve 12, a plurality of sliders and springs are arranged in the guide groove, and the slider located at the bottom is fixedly connected to the outer wall of the grouting pipe 8, so that when the linear drive 20 drives the outer sleeve 12 to move toward the inside of the mounting tube 1, the spring can provide a restoring force to the grouting pipe 8, so that the grouting pipe 8 also moves synchronously toward the inside of the mounting tube 1.

[0030] In another embodiment, a first limiting ring 24 is fixedly provided at the bottom of the outer ring of the first bearing 11 , and a second limiting ring 25 is fixedly provided at the top of the outer ring of the second bearing 17 , so that the moving distance of the outer sleeve 12 is limited by the first limiting ring 24 and the second limiting ring 25 .

[0031] Furthermore, a pressure sensor may be provided on the side of the first limiting ring 24 close to the second limiting ring 25 , and the linear drive 20 controls the start and stop of the linear drive 20 according to the pressure signal detected by the pressure sensor.

[0032] In another embodiment, a plug-in ring 26 is fixedly provided at the head end of the installation pipe 1, and a receiving groove cooperating with the plug-in ring 26 is provided at the tail end, so as to realize connection with the pipe jacking machine and the next section of the pipeline through the plug-in ring 26 and the receiving groove respectively.

[0033] In another embodiment, the elastic connecting plate 6 is a rubber corrugated plate with a corrugated cross section.

[0034] Furthermore, the present invention also provides a pipe jacking grouting construction method, which uses the above-mentioned pipe jacking grouting device to perform construction operations, comprising: Step 1: Install the installation pipe 1 between the pipe jacking machine and the next section of the pipe; Step 2: According to the construction requirements, the driving assembly is started, and the arc plate is driven to move up and extend out of the installation groove 2 through the driving assembly. At the same time, the grouting pipe 8 moves up through the arc cavity 3 and extends into the airbag 7 and drives the arc push plate 4 to move up; Step 3: Fill the air bag 7 with air through the air channel and the air valve, so that the arc-shaped push plate 4 pushes outwards evenly to squeeze the soil around the installation pipe; Step 4: injecting bentonite slurry into the arc-shaped cavity 3 through the grouting channel and the grouting hole, and the bentonite slurry flows out through the slurry outlet hole 5, so that a slurry sleeve is formed on the wall of the installation pipe 1; Step 5: After the jacking is completed, the air in the airbag 7 is discharged through the gas channel and the air valve, the grouting assembly and the driving assembly are removed, and the arc cavity 3 and the mounting hole are sealed.

[0035] The number of equipment and processing scale described here are used to simplify the description of the present invention. The application, modification and variation of the pipe grouting device and construction method of the present invention are obvious to those skilled in the art.

[0036] Although the embodiments of the present invention have been disclosed as above, they are not limited to the applications listed in the specification and the implementation modes, and they can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A pipe grouting device, characterized in that: include: The mounting tube has a plurality of mounting grooves spaced apart along the circumference of the outer wall thereof, each mounting groove has at least two mounting holes spaced apart therein, and each mounting hole is arranged along the radial direction of the mounting tube and communicates with the inside thereof; A plurality of arc-shaped plates, which are arranged in one-to-one correspondence with the plurality of mounting grooves, each arc-shaped plate is clamped in the mounting groove and slidably connected with the mounting groove along the radial direction of the mounting tube, the arc-shaped plate comprises an arc-shaped cavity and an arc-shaped push plate arranged on the outside thereof, one end of the arc-shaped cavity close to the tail of the mounting tube is provided with a plurality of slurry outlet holes at intervals along its circumference, the inner side edge of the arc-shaped push plate is fixedly connected with the outer side of the arc-shaped cavity through an elastic connecting plate, and the arc-shaped push plate, the elastic connecting plate and the arc-shaped cavity together form an airbag; A plurality of grouting components, one grouting component is correspondingly arranged in each mounting hole, each grouting component comprises a grouting pipe, an upper part of the side wall of which is provided with an air valve and a grouting hole in sequence from top to bottom, the air valve and the grouting hole are respectively connected with a gas channel and a grouting channel arranged inside the grouting pipe; Multiple driving components, one driving component is corresponding to each grouting component, and the driving component is used to drive the grouting component to move along the radial direction of the mounting tube and drive the arc plate to move up and extend out of the mounting groove. At the same time, the grouting tube moves up, passes through the arc cavity, extends into the airbag and drives the arc push plate to move up, so that the grouting hole is located in the arc cavity, and the air valve is located in the airbag.

2. The pipe grouting device according to claim 1, characterized in that: The grouting assembly includes a first connecting sleeve, the upper part of which extends into the mounting hole and is threadedly connected to the mounting sleeve pre-buried therein; a first bearing, which extends into the first connecting sleeve and is threadedly connected thereto; an outer sleeve, which extends into the first bearing and is splined to its inner ring, and the top outer wall of the outer sleeve is threadedly connected to a second connecting sleeve preset on the inner side surface of the arc-shaped cavity; a grouting pipe, which is slidably arranged in the outer sleeve, a damping rubber is arranged between the grouting pipe and the outer sleeve, and the bottom of the grouting pipe is connected to a grouting pipe arranged in the mounting pipe through a telescopic pipe; wherein the outer sleeve and the grouting pipe are driven by the driving assembly to move radially along the mounting pipe.

3. The pipe grouting device according to claim 2, characterized in that: The driving assembly includes a first mounting plate, which is rotatably connected to the bottom outer wall of the outer sleeve through a second bearing, a second mounting plate, which is fixedly mounted on the bottom outer wall of the grouting pipe, a pair of L-shaped support plates, which are symmetrically arranged on both sides of the first mounting plate, and the vertical end of each L-shaped support plate is fixedly connected to the mounting tube, two linear drives, which are respectively vertically arranged on the horizontal ends of the pair of L-shaped support plates, and the output end of each linear drive is detachably connected to the first mounting plate through a connecting ear plate, and two pulleys, which are symmetrically arranged on the first mounting plate, and a driving rope is wound around each pulley, one end of the driving rope is detachably connected to the horizontal end of the L-shaped support plate, and the other end is detachably connected to the second mounting plate.

4. The pipe grouting device according to claim 3, characterized in that: The inner wall of the outer sleeve is provided with at least two guide grooves spaced apart along its circumference, each guide groove is arranged along the axial direction of the outer sleeve, and a plurality of sliders are slidably mounted in each guide groove along its length direction, a spring is provided between two adjacent sliders, and the slider at the bottom is fixedly connected to the outer wall of the grouting pipe.

5. The pipe grouting device according to claim 4, characterized in that: A first limiting ring is fixedly disposed at the bottom of the outer ring of the first bearing, and a second limiting ring is fixedly disposed at the top of the outer ring of the second bearing.

6. The pipe grouting device according to claim 5, characterized in that: The head end of the installation tube is fixedly provided with a plug-in ring, and the tail end is provided with a receiving groove matched with the plug-in ring.

7. The pipe grouting device according to claim 6, characterized in that: The elastic connecting plate is a rubber corrugated plate with a corrugated cross section.

8. A pipe jacking grouting construction method, characterized in that: The construction operation is carried out using the pipe grouting device as claimed in claim 1, comprising: Step 1: Install the installation pipe between the pipe jacking machine and the next section of the pipe; Step 2: According to the construction requirements, the driving assembly is started, and the arc plate is driven to move up and extend out of the installation groove through the driving assembly. At the same time, the grouting pipe moves up through the arc cavity and extends into the airbag to drive the arc push plate to move up; Step 3: Fill the air bag with air through the air channel and the air valve, so that the arc-shaped push plate pushes outwards evenly to squeeze the soil around the installation pipe; Step 4: injecting bentonite slurry into the arc-shaped cavity through the grouting channel and the grouting hole, and the bentonite slurry flows out through the slurry outlet hole to form a slurry sleeve on the installation pipe wall; Step 5: After the jacking is completed, the air in the airbag is discharged through the gas channel and the air valve, the grouting assembly and the drive assembly are removed, and the arc cavity and the installation hole are sealed.

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