CN112412470A - Pipe jacking machine and pipe joint returning construction device and construction method - Google Patents
Pipe jacking machine and pipe joint returning construction device and construction method Download PDFInfo
- Publication number
- CN112412470A CN112412470A CN202011129227.8A CN202011129227A CN112412470A CN 112412470 A CN112412470 A CN 112412470A CN 202011129227 A CN202011129227 A CN 202011129227A CN 112412470 A CN112412470 A CN 112412470A
- Authority
- CN
- China
- Prior art keywords
- pipe
- pipe joint
- jacking machine
- push bench
- working well
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010276 construction Methods 0.000 title claims abstract description 43
- 230000007246 mechanism Effects 0.000 claims abstract description 128
- 230000002265 prevention Effects 0.000 claims abstract description 15
- 239000002689 soil Substances 0.000 claims description 43
- 238000000034 method Methods 0.000 claims description 28
- 239000004568 cement Substances 0.000 claims description 24
- 230000008569 process Effects 0.000 claims description 15
- 238000002347 injection Methods 0.000 claims description 9
- 239000007924 injection Substances 0.000 claims description 9
- 239000011435 rock Substances 0.000 claims description 8
- 229910000831 Steel Inorganic materials 0.000 claims description 7
- 239000010959 steel Substances 0.000 claims description 7
- 230000009467 reduction Effects 0.000 claims description 6
- 230000005484 gravity Effects 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 10
- 238000010586 diagram Methods 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 5
- 238000005086 pumping Methods 0.000 description 3
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 229920002134 Carboxymethyl cellulose Polymers 0.000 description 1
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000440 bentonite Substances 0.000 description 1
- 229910000278 bentonite Inorganic materials 0.000 description 1
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 235000010948 carboxy methyl cellulose Nutrition 0.000 description 1
- 239000001768 carboxy methyl cellulose Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 235000017550 sodium carbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 1
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/028—Laying or reclaiming pipes on land, e.g. above the ground in the ground
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
- F16L1/024—Laying or reclaiming pipes on land, e.g. above the ground
- F16L1/06—Accessories therefor, e.g. anchors
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
Abstract
The invention discloses a pipe jacking machine and a construction device and a construction method for pipe joint rollback, which comprises a drawing mechanism for drawing the pipe jacking machine and the pipe joint rollback and a withdrawal prevention mechanism for adaptively retracting according to the drawing speed of the drawing mechanism, wherein the fixed end of the drawing mechanism is arranged on the inner side of the front end well wall of a working well, the movable end of the drawing mechanism penetrates through the pipe joint and is connected with the rear shell of the pipe jacking machine, the fixed end of the withdrawal prevention mechanism is arranged on the inner side of the rear end well wall of the working well, the movable end of the withdrawal prevention mechanism is connected with the tail pipe joint, a plurality of pipe joints and the pipe jacking machine are drawn by the drawing mechanism to retreat into the working well section by section along the axial direction of the plurality of pipe joints, the withdrawal mechanism carries out limiting support on the plurality of pipe joints and the pipe jacking machine and retracts adaptively according to the drawing speed of the drawing mechanism so as to prevent the pipe jacking machine and the pipe joint from rapidly retracting due to, so that the multiple pipe sections are disassembled section by section and then lifted out of the working well and the pipe jacking machine is lifted out of the working well.
Description
Technical Field
The invention relates to the technical field of pipe jacking construction, in particular to a pipe jacking machine and a construction device and a construction method for pipe joint retraction.
Background
Along with the development of underground structure, the application field of pipe jacking construction gradually extends from small pipe networks to large comprehensive pipe gallery engineering and underground tunnel engineering. However, the fault tolerance of the existing pipe jacking construction is very low, and due to the particularity of the pipe jacking process, if jacking deviation occurs in the jacking process, deviation rectification is difficult to perform, and currently, a large-curvature slow deviation rectification method is usually adopted for adjustment. However, when the deviation angle is too large, the deviation correction is very difficult, and even the whole push bench and the plurality of pipe joints may be buried underground for a long time and cannot be used if the push bench and the pipe joints are not retracted. Therefore, when the pipe jacking construction axis has large deviation and cannot be corrected or is not suitable for continuous jacking, the pipe jacking machine and the pipe joint need to be retracted.
Disclosure of Invention
The invention provides a construction device and a construction method for backing up a push bench and pipe joints, which are used for solving the technical problem that the whole push bench and a plurality of pipe joints are possibly buried underground for a long time and cannot be used due to the difficulty in backing up the push bench and the pipe joints when jacking deviation occurs in the existing push bench construction process.
According to one aspect of the invention, a pipe jacking machine and a construction device for pipe joint retraction are provided, which are used for retracting a pipe jacking machine in soil and a plurality of pipe joints connected to a rear shell of the pipe jacking machine, the construction device comprises a drawing mechanism for drawing the pipe jacking machine and the pipe joints to retract and a retraction prevention mechanism for retracting adaptively according to the drawing speed of the drawing mechanism, the fixed end of the drawing mechanism is arranged on the inner side of a front end well wall of a working well, the movable end of the drawing mechanism penetrates through the pipe joints and is connected with the rear shell of the pipe jacking machine, the fixed end of the retraction prevention mechanism is arranged on the inner side of a rear end well wall of the working well, the movable end of the retraction prevention mechanism is connected with a tail pipe joint, the plurality of pipe joints and the pipe jacking machine are drawn by the drawing mechanism and retract into the working well section by section along the axial direction of the plurality of pipe joints, and the pipe jacking machine are limited and supported by the retraction prevention mechanism and retract, the pipe jacking machine is used for preventing the pipe jacking machine and the pipe sections from rapidly retreating due to inertia or thrust in surrounding rocks, so that the pipe jacking machine is hoisted out of a working well after the plurality of pipe sections are disassembled section by section and the pipe jacking machine is hoisted out of the working well.
Furthermore, the drawing mechanism comprises a drawing jack with a fixed end installed on the inner side of the front end well wall of the working well and a drawing assembly used for connecting the movable end of the drawing jack with the rear shell of the push bench, the front end of the drawing assembly is connected with the rear shell of the push bench, the rear end of the drawing assembly is connected with the movable end of the drawing jack, the rear end of the drawing assembly is pushed to move backwards through the movable end of the drawing jack, and then the push bench and the multi-section pipe joints are pulled to move backwards through the front end of the drawing assembly.
Furthermore, the anti-retreating mechanism comprises an anti-retreating jack of which the fixed end is installed on the inner side of the rear end well wall of the working well, and the movable end of the anti-retreating jack is connected with the tail pipe joint.
Furthermore, the construction device also comprises a backstop device arranged on the inner side of the rear end well wall of the working well, and the backstop device is arranged opposite to the drawing mechanism; the backstop is of a fixed structure, so that the drawing mechanism is abutted against the backstop after retreating for a fixed length of travel each time, and then a plurality of pipe joints retreating to the working well section by section and the pipe jacking machine are disassembled; or the backstop is of a telescopic structure, so that when the drawing mechanism pulls the push bench and the pipe joints to retreat into the working well section by section along the axial direction of the multiple pipe joints for disassembly, the backstop is telescopically adjusted to be abutted against the drawing mechanism.
According to another aspect of the present invention, there is provided a pipe jacking machine and a pipe joint retracting construction method, for retracting a pipe jacking machine in a soil body and a plurality of pipe joints connected to a rear shell of the pipe jacking machine, comprising the steps of: the movable end of the drawing mechanism penetrates through the pipe joint to be connected with a rear shell of the push bench; connecting the movable end of the anti-retreat mechanism with the tail pipe joint; the pipe jacking machine and the multiple sections of pipe joints are pulled to integrally retreat by the drawing mechanism, and the retreat resisting mechanism reversely acts on the tail pipe joint to carry out limiting support on the pipe jacking machine and the multiple sections of pipe joints integrally and retract adaptively according to the pulling speed of the drawing mechanism, so that the pipe jacking machine and the pipe joints are prevented from quickly retreating due to inertia or thrust in surrounding rocks until the tail pipe joint retreats into a working well; disconnecting and retracting the movable end of the anti-retreat mechanism and the tail pipe joint; the last pipe joint is disassembled and lifted out of the working well; and connecting the movable end of the stopping and withdrawing mechanism with a new tail pipe joint again, and withdrawing the multiple pipe joints and the pipe jacking machine into the working well section by section along the axial direction of the multiple pipe joints by the same method so as to lift the multiple pipe joints out of the working well after being disassembled section by section and lift the pipe jacking machine out of the working well.
Further, before the multiple pipe joints and the pipe pushing jack are retracted, the method also comprises the following steps: the backstop device is arranged on the inner side of the rear-end well wall of the working well and is opposite to the drawing mechanism, so that when the drawing mechanism draws the push bench and the pipe joints to retreat into the working well section by section for disassembly, the drawing mechanism is abutted against the backstop device, and the drawing mechanism, the push bench and the multiple pipe joints are prevented from moving after the movable end of the backstop mechanism is disconnected with the tail pipe joints.
Further, in the process of multi-joint pipe joints and the retraction of the pipe pushing jack, the method also comprises the following steps: and injecting cement soil into the front of the pipe jacking machine through the front shell of the pipe jacking machine so as to fill a cavity generated in the soil body in the front due to the retraction of the pipe jacking machine.
Further, before injecting cement soil, the method also comprises the following steps: determining the theoretical filling amount of each cement soil: v is Alt, wherein V is the theoretical filling amount of the cement soil, A is the section area of the soil body, and l is the length of each rollback; determining the injection pressure of the cement soil: p ═ R (R × S + W × f) × L)/a, where R is the comprehensive frictional resistance, S is the outer circumference of the pipe joint, W is the average gravity per linear meter of the pipe pusher and the whole of the plurality of pipe joints, f is the coefficient of friction of the pipe joint in the soil, and L is the total retraction length.
Further, in the process of multi-joint pipe joints and the retraction of the pipe pushing jack, the method also comprises the following steps: and injecting the anti-drag slurry into the outer sides of the push bench and the plurality of pipe fittings, and wrapping the push bench and the plurality of pipe joints by the anti-drag slurry so as to reduce the frictional resistance between the push bench and the soil body as well as between the plurality of pipe joints.
Further, after the push bench retreats into the working well, the method also comprises the following steps: and (4) driving Larsen steel sheet piles into the outer sides of the holes in the front end well wall of the working well to seal the holes.
The invention has the following beneficial effects:
the pipe jacking machine and the construction device for pipe joint retraction of the invention are characterized in that the pulling mechanism is arranged on the inner side of the front end well wall of the working well and the movable end of the pulling mechanism is connected with the rear shell of the pipe jacking machine, and by installing the anti-retreat mechanism on the inner side of the rear-end well wall of the working well and connecting the movable end of the anti-retreat mechanism with the tail pipe joint, thereby pulling the push bench and the pipe joint to retreat through the drawing mechanism, and retracting adaptively through the retreat resisting mechanism according to the pulling speed of the drawing mechanism, thereby the push bench and the pipe joints in the retraction process are limited and supported by the retraction resisting mechanism, thereby preventing the push bench and the pipe joints from being rapidly retracted due to inertia or thrust in surrounding rocks until the last pipe joint is retracted into a working well, the movable end of the stopping mechanism is disconnected with the tail pipe joint and retracts, so that the tail pipe joint is detached and lifted out of the working well; and the multiple pipe joints and the pipe jacking machine are retreated into the working well section by the same method, and the multiple pipe joints and the pipe jacking machine are hoisted out of the working well.
In addition to the objects, features and advantages described above, other objects, features and advantages of the present invention are also provided. The present invention will be described in further detail below with reference to the drawings.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:
FIG. 1 is a schematic structural view of a pipe jacking machine and a construction apparatus for pipe joint retraction according to a preferred embodiment of the present invention in a horizontal section in an initial state;
FIG. 2 is a schematic structural view of a pipe jacking machine and a construction apparatus for pipe joint retreat in an initial state in a vertical section according to a preferred embodiment of the present invention;
FIG. 3 is a schematic diagram of a horizontal section of the last pipe section of the preferred embodiment of the present invention retracted into the working well;
FIG. 4 is a schematic structural view in horizontal section of the final pipe section of the preferred embodiment of the present invention after disassembly;
FIG. 5 is a schematic diagram of the horizontal section of the anti-backup mechanism of the preferred embodiment of the present invention reconnected to the last pipe joint;
FIG. 6 is a schematic diagram of the horizontal section of the preferred embodiment of the present invention with the pulling mechanism re-attached to the rear shell of the push bench;
FIG. 7 is a schematic structural view of a horizontal section of a push bench of the preferred embodiment of the present invention retracted into the work well;
FIG. 8 is a schematic structural view in horizontal cross-section of a drag reducing mud injection of a preferred embodiment of the present invention;
fig. 9 is a schematic structural view of a drawing assembly of a preferred embodiment of the present invention.
Illustration of the drawings:
100. a pipe jacking machine; 101. a front housing; 102. a rear housing; 200. pipe joints; 300. a working well; 400. a soil body; 500. cement soil; 600. drag reduction mud; 1. a drawing mechanism; 11. drawing a jack; 12. a drawing assembly; 121. a main beam; 122. a connecting beam; 123. a reinforcing beam; 124. a diagonal bracing beam; 2. a withdrawal prevention mechanism; 21. stopping and withdrawing the jack; 22. a rear backrest; 23. carrying out iron jacking; 3. a backstop device; 4. larsen steel sheet pile.
Detailed Description
The embodiments of the invention will be described in detail below with reference to the accompanying drawings, but the invention can be embodied in many different forms, which are defined and covered by the following description.
FIG. 1 is a schematic structural view of a pipe jacking machine and a construction apparatus for pipe joint retraction according to a preferred embodiment of the present invention in a horizontal section in an initial state; FIG. 2 is a schematic structural view of a pipe jacking machine and a construction apparatus for pipe joint retreat in an initial state in a vertical section according to a preferred embodiment of the present invention; FIG. 3 is a schematic diagram of a horizontal section of the last pipe section of the preferred embodiment of the present invention retracted into the working well; FIG. 4 is a schematic structural view in horizontal section of the final pipe section of the preferred embodiment of the present invention after disassembly; FIG. 5 is a schematic diagram of the horizontal section of the anti-backup mechanism of the preferred embodiment of the present invention reconnected to the last pipe joint; FIG. 6 is a schematic diagram of the horizontal section of the preferred embodiment of the present invention with the pulling mechanism re-attached to the rear shell of the push bench; FIG. 7 is a schematic structural view of a horizontal section of a push bench of the preferred embodiment of the present invention retracted into the work well; FIG. 8 is a schematic structural view in horizontal cross-section of a drag reducing mud injection of a preferred embodiment of the present invention; fig. 9 is a schematic structural view of a drawing assembly of a preferred embodiment of the present invention.
As shown in fig. 1, the pipe pushing jack 100 and the pipe joint 200 retracting construction device of this embodiment are used for retracting a pipe pushing jack 100 in a soil body 400 and a plurality of pipe joints 200 connected to a rear housing 102 of the pipe pushing jack 100, the construction device includes a drawing mechanism 1 for drawing the pipe pushing jack 100 and the pipe joints 200 to retract and a retraction prevention mechanism 2 for retracting adaptively according to a drawing speed of the drawing mechanism 1, a fixed end of the drawing mechanism 1 is installed inside a front end well wall of a working well 300, a movable end of the drawing mechanism 1 passes through the pipe joints 200 and is connected with the rear housing 102 of the pipe pushing jack 100, a fixed end of the retraction prevention mechanism 2 is installed inside a rear end well wall of the working well 300, a movable end of the retraction prevention mechanism 2 is connected with a last pipe joint 200, the plurality of pipe joints 200 are drawn by the drawing mechanism 1 and the pipe pushing jack 100 retracts into the working well 300 along the axial direction of the plurality of pipe joints 200, and the retraction prevention mechanism 2 limits and supports the plurality of pipe joints 200 and the pipe joints, and is adaptively retracted according to the pulling speed of the pulling mechanism 1 to prevent the pipe jacking machine 100 and the pipe joints 200 from rapidly retracting due to inertia or thrust in surrounding rocks, so that the plurality of pipe joints 200 are disassembled section by section and then the pipe jacking machine 100 is hoisted out of the working well 300.
As shown in fig. 1-7, in the construction device for retracting the push bench 100 and the pipe joints 200 according to the present invention, the pulling mechanism 1 is installed inside the front end wall of the working well 300, the movable end of the pulling mechanism 1 is connected to the rear housing 102 of the push bench 100, the retraction mechanism 2 is installed inside the rear end wall of the working well 300, and the movable end of the retraction mechanism 2 is connected to the last pipe joint 200, so that the push bench 100 and the pipe joints 200 are pulled to retract by the pulling mechanism 1, and the retraction mechanism 2 retracts adaptively according to the pulling speed of the pulling mechanism 1, so that the push bench 100 and the pipe joints 200 during retraction are limited and supported by the retraction mechanism 2, thereby preventing the push bench 100 and the pipe joints 200 from retracting rapidly due to inertia or thrust in surrounding rocks until the last pipe joint 200 retracts into the working well 300, and further disconnecting and retracting the movable end of the retraction mechanism 2 from the last pipe joint 200, thereby removing the last pipe section 200 and hoisting the work well 300; in the same way as above, multiple pipe joints 200 and pipe push bench 100 are retracted into working well 300 section by section, and multiple pipe joints 200 and pipe push bench 100 are hoisted out of working well 300.
As shown in fig. 9, the drawing mechanism 1 includes a drawing jack 11 with a fixed end installed inside the front end wall of the working well 300 and a drawing assembly 12 for connecting a movable end of the drawing jack 11 with the rear housing 102 of the push bench 100, the front end of the drawing assembly 12 is connected with the rear housing 102 of the push bench 100, the rear end of the drawing assembly 12 is connected with the movable end of the drawing jack 11, the rear end of the drawing assembly 12 is pushed by the movable end of the drawing jack 11 to move backwards, and the push bench 100 and the multi-joint pipe joint 200 are pulled to move backwards through the front end of the drawing assembly 12.
As shown in fig. 1 to 7, a plurality of drawing jacks 11 are optionally arranged at equal intervals along the circumference of the hole on the front end wall of the working well 300. Optionally, drawing assembly 12 includes a main beam 121 connected to the movable end of drawing jack 11, and a connection beam 122 arranged along the laying direction of push bench 100 and pipe joint 200, wherein the rear end of connection beam 122 is connected to main beam 121, and the front end of connection beam 122 is used for connecting to rear housing 102 of push bench 100. Optionally, the pulling assembly 12 further comprises a reinforcing beam 123 for connecting the plurality of connecting beams 122 and a raker beam 124 for connecting the connecting beams 122 with the main beam 121 to form a triangular stable structure.
As shown in fig. 1 to 7, the retraction mechanism 2 includes a retraction jack 21 having a fixed end mounted on the inner side of the rear wall of the working well 300, and a movable end of the retraction jack 21 is connected to the last pipe joint 200. Alternatively, the blocking jacks 21 correspond one-to-one to the drawing jacks 11. In the retracting process, the stroke directions of the drawing jack 11 and the retraction jack 21 are opposite, and the strokes are in a complementary state. The inner side of the rear end wall of the working well 300 is provided with a rear backrest 22 and a top iron 23 laid on the rear backrest 22, and the fixed end of the retraction jack 21 is arranged on the top iron 23. The pressure generated when the stopping jack 21 supports the pipe joint 200 and the jacking pipe is uniformly dispersed to the rear end well wall of the working well 300 through the jacking iron 23, so that the deformation and damage caused by the local over-pressure of the rear end well wall of the working well 300 are avoided.
As shown in fig. 1 to 7, the construction apparatus further includes a backstop mechanism installed at an inner side of a rear-end well wall of the working well 300, the backstop mechanism being disposed opposite to the drawing mechanism 1; the backstop 3 is a fixed structure, so that the drawing mechanism 1 is abutted against the backstop 3 after retreating for a fixed length of stroke each time, and further the multi-section pipe joints 200 retreating to the working well 300 section by section and the pipe jacking machine 100 are disassembled; or the retaining device 3 is of a telescopic structure, so that when the drawing mechanism 1 pulls the push bench 100 and the plurality of pipe joints 200 to retract into the working well 300 section by section along the axial direction of the plurality of pipe joints 200 for disassembly, the retaining device 3 is telescopically adjusted to enable the retaining device 3 to be abutted with the drawing mechanism 1. In the present embodiment, the backstops 3 correspond to the drawing jacks 11 one to one. The stopper 3 is brought into contact with the drawing mechanism 1, thereby preventing the pipe joint 200 from moving when it is removed.
Optionally, the backstop 3 includes a backstop frame fixed on the top iron 23 and a rubber pad fixed on the backstop frame. After the drawing mechanism 1 and the stopping mechanism 2 are matched to retreat the tail pipe joint 200 into the working well 300, the movable end of the stopping jack 21 is disconnected with the tail pipe joint 200 and retracts to detach the tail pipe joint 200, the drawing assembly 12 is limited and supported through the stopping device 3, and therefore the drawing assembly 12, the pipe jacking machine 100 and the pipe joint 200 are prevented from moving back and forth in the detaching process. Because the backstop 3 limits the stroke of the drawing jack 11, the distance between the backstop 3 and the drawing assembly 12 is equal to the stroke of each retraction, and after the fixed-length stroke of each retraction, the tail pipe joint 200 is retracted into the working well 300 and disassembled. Since the rear shell 102 of the push bench 100 is retracted after each retraction, the connecting beam 122 of the pulling assembly 12 needs to be cut off by a section, then the pulling jack 11 retracts to the initial position, and then the connecting beam 122 is connected with the rear shell 102 of the push bench 100, wherein the length of the cut-off connecting beam 122 is equal to the length of the stroke of each retraction.
Optionally, the backstop 3 comprises a backstop jack or a backstop telescopic frame. The drawing mechanism 1 retracts the multiple pipe joints 200 and the push bench 100 into the working well 300 section by section, the retracting stroke of each time is different, and the backstop 3 is adjusted in a telescopic mode according to the retracting stroke of each time of the drawing mechanism 1, so that the distance between the movable end of the backstop 3 and the drawing assembly 12 is equal to the retracting stroke of the drawing assembly 12. When the pulling mechanism 1 pulls the pipe joint 200 to retract to the working well 300 to be detached, the retaining device 3 is controlled to extend to abut against the pulling assembly 12, so that the redundant retraction distance is reduced, and the speed of detaching the pipe joint 200 is increased. Since the rear shell 102 of the push bench 100 is retracted correspondingly after each retraction, the movable end of the backstop 3 is retracted, so that the distance between the movable end of the backstop 3 and the drawing assembly 12 is equal to the length of the retraction stroke of the next drawing mechanism 1. Or after the connecting beam 122 of the pulling assembly 12 is cut off, the pulling jack 11 retracts, so that the distance between the movable end of the backstop 3 and the pulling assembly 12 is equal to the length of the retraction stroke of the next pulling mechanism 1.
As shown in fig. 1 to 7, the construction method for retracting a push bench 100 and a pipe joint 200 of this embodiment is used for retracting the push bench 100 in a soil body 400 and a plurality of pipe joints 200 connected to a rear shell 102 of the push bench 100, and includes the following steps: the movable end of the drawing mechanism 1 passes through the pipe joint 200 to be connected with the rear shell 102 of the push bench 100; connecting the movable end of the anti-retreat mechanism 2 with the tail pipe joint 200; the pipe jacking machine 100 and the multiple sections of pipe joints 200 are pulled to integrally retreat by the drawing mechanism 1, and meanwhile, the retreat resisting mechanism 2 reversely acts on the tail pipe joint 200 to carry out limiting support on the whole pipe jacking machine 100 and the multiple sections of pipe joints 200 and retract adaptively according to the pulling speed of the drawing mechanism 1, so that the pipe jacking machine 100 and the pipe joints 200 are prevented from rapidly retreating due to inertia or thrust in surrounding rocks until the tail pipe joint 200 retreats into the working well 300; disconnecting and retracting the movable end of the anti-retreat mechanism 2 and the tail pipe joint 200; the last pipe section 200 is removed and the working well 300 is hoisted out; the movable end of the stopping and withdrawing mechanism 2 is reconnected with the new last pipe joint 200, and the multiple pipe joints 200 and the push bench 100 are withdrawn into the working well 300 section by section along the axial direction of the multiple pipe joints 200 in the same manner as described above, so that the multiple pipe joints 200 are disassembled section by section and then the push bench 100 is lifted out of the working well 300.
As shown in fig. 4-5, before the multiple tube joints 200 and the push bench 100 are retracted, the method further includes the following steps: the backstop 3 is arranged on the inner side of the rear-end well wall of the working well 300 and is opposite to the drawing mechanism 1, so that when the drawing mechanism 1 draws the push bench 100 and the plurality of pipe joints 200 to retreat into the working well 300 section by section for disassembly, the drawing mechanism 1 is abutted against the backstop 3, and the drawing mechanism 1, the push bench 100 and the plurality of pipe joints 200 are prevented from moving after the movable end of the backstop mechanism 2 is disconnected with the tail pipe joint 200.
As shown in fig. 1-7, the process of retracting the multi-joint pipe joint 200 and the push bench 100 further includes the following steps: soil cement 500 is injected into the front of the push bench 100 through the front casing 101 of the push bench 100 to fill a cavity in the front soil 400 generated by the retraction of the push bench 100. In the present embodiment, soil cement 500 is injected in front of push bench 100 by a dredge pump. The cement soil 500 is a mixture of cement and bentonite. The injection is carried out every 5cm back.
Before the cement 500 is injected, the method also comprises the following steps: determining the theoretical filling amount of the cement soil 500 at each time: v is Alt, wherein V is the theoretical filling amount of the cement soil 500, a is the cross-sectional area of the soil body 400, and l is the length of each rollback; determining the injection pressure of the cement soil 500: p ═ R (R × S + W × f) × L)/a, where R is the combined frictional resistance, S is the outer circumference of the pipe joint 200, W is the average gravity per linear meter of the whole of the pipe pusher 100 and the plurality of pipe joints 200, f is the coefficient of friction of the pipe joint 200 in the soil body 400, and L is the total retreat length. By determining the filling amount of the cement soil and the injection pressure of the cement soil in advance, the cement soil can be smoothly injected into and filled in the cavity in front of the push bench 100 in the retraction process. The coefficient of friction of the pipe section 200 in the soil body 400 is typically 1.2. In the actual cement soil 500 injection process, the initial value of the mud pumping pressure of the mud pumping pump is set as the theoretically calculated injection pressure value of the cement soil 500, and according to the monitoring data of the settlement monitoring point, the pressure value when the road surface arch camber does not exceed 20mm is the final mud pumping pressure value.
As shown in fig. 8, the process of retracting the multi-joint pipe joint 200 and the push bench 100 further includes the following steps: the drag reduction mud 600 is injected into the outer sides of the push bench 100 and the plurality of pipe fittings, and the push bench 100 and the plurality of pipe joints 200 are wrapped by the drag reduction mud 600, so that the frictional resistance between the push bench 100 and the plurality of pipe joints 200 and the soil body 400 is reduced. In this embodiment, the drag reduction mud 600 is a mixture of clay, water, soda ash and CMC (sodium carboxymethylcellulose) in a ratio of 700: 691: 6: 2.5.
As shown in fig. 7, after push bench 100 is retracted into working well 300, the method further includes the following steps: and (3) driving Larsen steel sheet piles 4 outside the holes in the front end well wall of the working well 300 to seal the holes. The Larsen steel sheet pile 4 is installed on the ground surface outside the hole.
As shown in fig. 1-7, the construction method for retracting the push bench 100 and the pipe joint 200 of the present embodiment adopts the construction device for retracting the push bench 100 and the pipe joint 200, and acts on the main beam 121 of the drawing assembly 12 through the drawing jack 11, meanwhile, the anti-withdrawing jack 21 acts on the pipe joint 200 in the reverse direction, so that the drawing assembly 12 pulls the push bench 100 and the multi-section pipe joint 200 to withdraw integrally until the main beam 121 of the drawing assembly 12 is abutted against the rubber cushion block of the backstop 3, and the last pipe joint 200 is completely withdrawn into the working well 300, at this time, the drawing jack 11 stops, the stopping jack 21 begins to retract, due to the existence of the backstop 3, the drawing component 12 can not move back and forth under the limitation of the backstop 3 and the drawing jack 11, therefore, the push bench 100 and the pipe joints 200 cannot move back and forth integrally, so that the tail pipe joint 200 is disassembled and then lifted out of the working well 300; after the last pipe joint 200 is detached and lifted, the retraction jack 21 is extended again to act on a new last pipe joint 200, then the connecting beam 122 of the drawing assembly 12 is separated from the rear shell 102, a part of the main beam 121 of the drawing assembly 12 is cut off, the cut-off length is the extended length of the drawing jack 11, and then the drawing jack 11 is retracted, and the movement of the whole pipe jacking machine 100 and the pipe joint 200 is limited because the retraction jack 21 acts on the last pipe joint 200; and welding and fixing the end part of the connecting beam 122 of the drawing assembly 12 on the rear shell 102 again, extending the drawing jack 11 to act on the main beam 121 of the drawing section steel assembly again, repeating the steps to enable the multiple sections of pipe joints 200 and the push bench 100 to retreat section by section, and injecting cement soil 500 in front of the push bench 100 in the retreating process to fill a cavity generated in front of the push bench 100 due to retreat. When the front shell 101 of the push bench 100 just exits the hole of the working well 300, a Larsen steel sheet pile is driven into the ground surface outside the hole to block the hole.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A pipe jacking machine and a construction device for pipe joint retraction are used for retracting a pipe jacking machine (100) in a soil body (400) and a plurality of sections of pipe joints (200) connected to a rear shell (102) of the pipe jacking machine (100),
the construction device comprises a drawing mechanism (1) for drawing the push bench (100) and the pipe joints (200) to retreat and a retraction prevention mechanism (2) for retracting according to the drawing speed of the drawing mechanism (1), wherein the fixed end of the drawing mechanism (1) is arranged on the inner side of the front end well wall of the working well (300), the movable end of the drawing mechanism (1) penetrates through the pipe joints (200) and is connected with the rear shell (102) of the push bench (100), the fixed end of the retraction prevention mechanism (2) is arranged on the inner side of the rear end well wall of the working well (300), the movable end of the retraction prevention mechanism (2) is connected with the tail pipe joint (200),
the multi-section pipe joint (200) and the pipe jacking machine (100) are pulled to retreat into the working well (300) section by section along the axial direction of the multi-section pipe joint (200) through the pulling mechanism (1), meanwhile, the stopping mechanism (2) carries out limiting support on the multi-section pipe joint (200) and the pipe jacking machine (100), and the pipe jacking machine can retract adaptively according to the pulling speed of the pulling mechanism (1) to prevent the pipe jacking machine (100) and the pipe joint (200) from retracting rapidly due to inertia or thrust in surrounding rocks, so that the multi-section pipe joint (200) is disassembled section by section and then hoisted out of the working well (300) and the pipe jacking machine (100) is hoisted out of the working well (300).
2. The pipe push bench and pipe joint retracting construction device according to claim 1,
the drawing mechanism (1) comprises a drawing jack (11) with a fixed end installed on the inner side of the front end well wall of the working well (300) and a drawing assembly (12) used for connecting the movable end of the drawing jack (11) with the rear shell (102) of the push bench (100), the front end of the drawing assembly (12) is connected with the rear shell (102) of the push bench (100), the rear end of the drawing assembly (12) is connected with the movable end of the drawing jack (11), the rear end of the drawing assembly (12) is pushed to move backwards through the movable end of the drawing jack (11), and then the push bench (100) and the multi-section pipe joints (200) are pulled to move backwards through the front end of the drawing assembly (12).
3. The pipe push bench and pipe joint retracting construction device according to claim 1,
the anti-retreating mechanism (2) comprises an anti-retreating jack (21) with a fixed end arranged on the inner side of the rear end well wall of the working well (300), and a movable end of the anti-retreating jack (21) is connected with the tail pipe joint (200).
4. The pipe push bench and pipe joint retracting construction device according to claim 1,
the construction device also comprises a backstop mechanism arranged on the inner side of the rear end well wall of the working well (300), and the backstop mechanism is opposite to the drawing mechanism (1);
the backstop (3) is of a fixed structure, so that the drawing mechanism (1) is abutted against the backstop (3) after retreating for a fixed length of stroke each time, and then a plurality of pipe joints (200) retreating to the working well (300) section by section and the pipe jacking machine (100) are disassembled; or
The backstop (3) is of a telescopic structure, so that when the drawing mechanism (1) draws the push bench (100) and the pipe joints (200) to retreat into the working well (300) along the axial direction of the pipe joints (200) section by section for disassembly, the backstop (3) is telescopically adjusted, and the backstop (3) is abutted to the drawing mechanism (1).
5. A pipe jacking machine and a construction method for pipe joint retraction are used for retracting a pipe jacking machine (100) in a soil body (400) and a plurality of sections of pipe joints (200) connected to a rear shell (102) of the pipe jacking machine (100), and are characterized by comprising the following steps:
the movable end of the drawing mechanism (1) penetrates through a pipe joint (200) to be connected with a rear shell (102) of the push bench (100); connecting the movable end of the anti-retreat mechanism (2) with the tail pipe joint (200);
the pipe jacking machine (100) and the multiple sections of pipe joints (200) are pulled to retreat integrally through the drawing mechanism (1), and meanwhile, the retreat resisting mechanism (2) acts on the tail pipe joint (200) in a reverse mode to limit and support the pipe jacking machine (100) and the multiple sections of pipe joints (200) integrally and retracts adaptively according to the pulling speed of the drawing mechanism (1), so that the pipe jacking machine (100) and the pipe joints (200) are prevented from retreating rapidly due to inertia or thrust in surrounding rocks until the tail pipe joint (200) retreats into the working well (300);
disconnecting and retracting the movable end of the anti-retreat mechanism (2) from the tail pipe joint (200);
the last pipe joint (200) is detached and lifted out of the working well (300);
and (3) connecting the movable end of the stopping and withdrawing mechanism (2) with a new tail pipe joint (200), withdrawing the multiple pipe joints (200) and the push bench (100) along the axial direction of the multiple pipe joints (200) one by one into the working well (300) in the same way, and then hoisting the multiple pipe joints (200) one by one out of the working well (300) and hoisting the push bench (100) out of the working well (300).
6. The pipe jacking machine and pipe joint retraction construction method according to claim 5, wherein before the multi-joint pipe joint (200) and the pipe jacking machine (100) are retracted, the method further comprises the following steps:
the withdrawal stopper (3) is arranged on the inner side of the rear-end well wall of the working well (300) and is opposite to the drawing mechanism (1), so that when the drawing mechanism (1) draws the push bench (100) and the plurality of pipe joints (200) to be withdrawn into the working well (300) section by section for disassembly, the drawing mechanism (1) is abutted against the withdrawal stopper (3), and the drawing mechanism (1), the push bench (100) and the plurality of pipe joints (200) are prevented from moving after the movable end of the withdrawal stopper (2) is disconnected from the tail pipe joint (200).
7. The pipe jacking machine and the pipe joint retreating construction method according to claim 5, wherein the process of retreating the pipe jacking machine (100) and the multi-joint pipe joint (200) further comprises the following steps:
soil cement (500) is injected into the front of the push bench (100) through the front casing (101) of the push bench (100) to fill a cavity in the front soil (400) caused by the retraction of the push bench (100).
8. The pipe jacking machine and pipe joint withdrawal construction method according to claim 5, further comprising the following steps before injecting the cement soil (500):
determining the theoretical filling amount of each cement soil (500): v is Alt, wherein V is the theoretical filling amount of the cement soil (500), A is the section area of the soil body (400), and l is the length of each rollback;
determining the injection pressure of the cemented soil (500): and P is (R multiplied by S + W multiplied by f) multiplied by L)/A, wherein R is the comprehensive frictional resistance, S is the outer circumference of the pipe joint (200), W is the average gravity per linear meter of the whole pipe jacking machine (100) and the plurality of pipe joints (200), f is the friction coefficient of the pipe joint (200) in the soil body (400), and L is the total retraction length.
9. The pipe jacking machine and the pipe joint retreating construction method according to claim 5, wherein the process of retreating the pipe jacking machine (100) and the multi-joint pipe joint (200) further comprises the following steps:
and injecting the drag reduction mud (600) into the outer sides of the push bench (100) and the plurality of pipe fittings, and wrapping the push bench (100) and the plurality of pipe joints (200) through the drag reduction mud (600) so as to reduce the frictional resistance between the push bench (100) and the plurality of pipe joints (200) and the soil body (400).
10. The pipe push bench and pipe joint retracting construction method according to claim 5, wherein after the pipe push bench (100) is retracted into the working well (300), the method further comprises the following steps:
and (3) driving Larsen steel sheet piles (4) outside the holes in the front end well wall of the working well (300) to seal the holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011129227.8A CN112412470B (en) | 2020-10-21 | 2020-10-21 | Pipe jacking machine and pipe joint returning construction device and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011129227.8A CN112412470B (en) | 2020-10-21 | 2020-10-21 | Pipe jacking machine and pipe joint returning construction device and construction method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN112412470A true CN112412470A (en) | 2021-02-26 |
| CN112412470B CN112412470B (en) | 2022-10-28 |
Family
ID=74841566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011129227.8A Active CN112412470B (en) | 2020-10-21 | 2020-10-21 | Pipe jacking machine and pipe joint returning construction device and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112412470B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983454A (en) * | 2021-03-25 | 2021-06-18 | 广州市第二市政工程有限公司 | Reverse recovery construction method for jacking pipe |
| CN113446434A (en) * | 2021-07-06 | 2021-09-28 | 中铁二十四局集团浙江工程有限公司 | Pipe withdrawing structure and method for construction |
| CN113586801A (en) * | 2021-07-06 | 2021-11-02 | 中铁二十四局集团浙江工程有限公司 | Stepping type pipe withdrawing structure and pipe withdrawing method |
| CN114215525A (en) * | 2021-12-14 | 2022-03-22 | 中铁工程装备集团有限公司 | Stopping device, upward jacking type vertical shaft tunneling equipment and vertical shaft construction method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899321A (en) * | 2014-04-23 | 2014-07-02 | 上海隧道工程股份有限公司 | Jacking pulling combined rectangular jacking pipe tunnel construction method |
| CN104265302A (en) * | 2014-08-06 | 2015-01-07 | 上海隧道工程有限公司 | Pipe jacking pipe joint retaining device |
| CN109403995A (en) * | 2018-11-20 | 2019-03-01 | 中国铁建重工集团有限公司 | A kind of deviation correcting device of push-bench |
| CN210317322U (en) * | 2019-05-30 | 2020-04-14 | 吉林硕乐科技有限公司 | Reverse jacking device for pipe jacking machine |
| CN111425213A (en) * | 2020-04-17 | 2020-07-17 | 中铁十八局集团有限公司 | In-tunnel rollback method for rock pipe jacking machine |
-
2020
- 2020-10-21 CN CN202011129227.8A patent/CN112412470B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103899321A (en) * | 2014-04-23 | 2014-07-02 | 上海隧道工程股份有限公司 | Jacking pulling combined rectangular jacking pipe tunnel construction method |
| CN104265302A (en) * | 2014-08-06 | 2015-01-07 | 上海隧道工程有限公司 | Pipe jacking pipe joint retaining device |
| CN109403995A (en) * | 2018-11-20 | 2019-03-01 | 中国铁建重工集团有限公司 | A kind of deviation correcting device of push-bench |
| CN210317322U (en) * | 2019-05-30 | 2020-04-14 | 吉林硕乐科技有限公司 | Reverse jacking device for pipe jacking machine |
| CN111425213A (en) * | 2020-04-17 | 2020-07-17 | 中铁十八局集团有限公司 | In-tunnel rollback method for rock pipe jacking machine |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983454A (en) * | 2021-03-25 | 2021-06-18 | 广州市第二市政工程有限公司 | Reverse recovery construction method for jacking pipe |
| CN113446434A (en) * | 2021-07-06 | 2021-09-28 | 中铁二十四局集团浙江工程有限公司 | Pipe withdrawing structure and method for construction |
| CN113586801A (en) * | 2021-07-06 | 2021-11-02 | 中铁二十四局集团浙江工程有限公司 | Stepping type pipe withdrawing structure and pipe withdrawing method |
| CN114215525A (en) * | 2021-12-14 | 2022-03-22 | 中铁工程装备集团有限公司 | Stopping device, upward jacking type vertical shaft tunneling equipment and vertical shaft construction method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN112412470B (en) | 2022-10-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112412470B (en) | Pipe jacking machine and pipe joint returning construction device and construction method | |
| CN109026025B (en) | Pipe jacking supporting and jacking system for construction tunnel connection channel | |
| CN106014427B (en) | A kind of construction method receiving push-bench and working steel bushing | |
| CN110644551B (en) | Pile driver and construction method thereof | |
| CN213980791U (en) | Pipe jacking machine and construction device for pipe joint returning | |
| CN113464156B (en) | Auxiliary tightening and propelling mechanism and tunnel boring machine | |
| CN112593969A (en) | Spiral pipe jacking machine | |
| CN113586801B (en) | Stepping pipe withdrawing structure and pipe withdrawing method | |
| CN216305926U (en) | Pipeline normal position replacement tunneling device | |
| CN114876473A (en) | Subway communication channel tunneling equipment based on horizontal full rotation and construction method | |
| CN113356871B (en) | Tunnel connecting channel tunneling equipment with full-rotation cutting steel ring and construction method | |
| CN208605194U (en) | A kind of effective top cover of jacking construction tool | |
| CN218093029U (en) | Super large diameter is worn lake push pipe and is moved back a tub device | |
| CN115822617A (en) | Ultra-large-diameter lake-penetrating pipe jacking and withdrawing device and construction method thereof | |
| CN214741384U (en) | Pipe jacking retaining device | |
| CN219198334U (en) | Jacking construction structure of ultra-small clear distance large jacking pipe | |
| CN218407433U (en) | Pipe jacking retaining device | |
| CN213014287U (en) | Negative frictional resistance eliminating device for pile foundation | |
| CN215110912U (en) | Pipe jacking structure for curved pipeline construction | |
| CN214660180U (en) | Low-resistance extrusion hole-expanding type rectangular pipe jacking machine | |
| CN218204356U (en) | Anti-collapse device for construction of concrete cast-in-place pile | |
| CN114321497B (en) | Deviation correcting method for pipe jacking construction | |
| CN220622959U (en) | Jacking system for comprehensive pipe rack jacking pipe construction | |
| CN217681735U (en) | TBM does not have originating hole room frock of originating | |
| CN106437730A (en) | Inverse pulling device of shield tunneling machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |