CN113338985B - Construction method for micro jacking pipe of ecological comprehensive pipe gallery engineering - Google Patents
Construction method for micro jacking pipe of ecological comprehensive pipe gallery engineering Download PDFInfo
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- 238000010276 construction Methods 0.000 title claims abstract description 86
- 238000000034 method Methods 0.000 claims abstract description 36
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- 239000002689 soil Substances 0.000 claims description 27
- 229910000831 Steel Inorganic materials 0.000 claims description 24
- 239000010959 steel Substances 0.000 claims description 24
- 238000006243 chemical reaction Methods 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 10
- 238000005259 measurement Methods 0.000 claims description 7
- 239000003921 oil Substances 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 7
- 239000010720 hydraulic oil Substances 0.000 claims description 6
- 238000004873 anchoring Methods 0.000 claims description 4
- 239000004567 concrete Substances 0.000 claims description 4
- 230000003760 hair shine Effects 0.000 claims description 3
- 238000005553 drilling Methods 0.000 description 6
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- 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
- E21D9/10—Making by using boring or cutting machines
- E21D9/11—Making by using boring or cutting machines with a rotary drilling-head cutting simultaneously the whole cross-section, i.e. full-face machines
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
- E21D11/04—Lining with building materials
- E21D11/08—Lining with building materials with preformed concrete slabs
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- 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
- E21D9/003—Arrangement of measuring or indicating devices for use during driving of tunnels, e.g. for guiding machines
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
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- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21F—SAFETY DEVICES, TRANSPORT, FILLING-UP, RESCUE, VENTILATION, OR DRAINING IN OR OF MINES OR TUNNELS
- E21F17/00—Methods or devices for use in mines or tunnels, not covered elsewhere
- E21F17/18—Special adaptations of signalling or alarm devices
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Abstract
The invention discloses a construction method of a miniature jacking pipe of an ecological comprehensive pipe gallery project, which comprises the following construction steps: step one, installing and debugging a miniature pipe jacking machine, step two, orienting a laser theodolite, step three, conducting pipe jacking first, step four, jacking an excavated outer pipe, step five, conducting spiral cutter disc jacking, step six, conducting reinforced concrete pipe jacking, step seven, dismantling equipment, dismantling each section of the guide pipe first and the excavated outer pipe in a receiving well in sequence in the pipe jacking construction process, and dismantling the spiral cutter disc, a pipe jacking machine table and a machine table base in the working well; the miniature pipe jacking construction method for the ecological comprehensive pipe gallery engineering is simple to operate, high in pipe jacking efficiency, very convenient and quick to install and disassemble, good in pipe jacking accuracy and safety, and suitable for quick construction of urban ecological comprehensive pipe galleries.
Description
Technical Field
The invention relates to the technical field of top pipe construction, in particular to a micro top pipe construction method for an ecological comprehensive pipe gallery project.
Background
With the acceleration of urban construction and updating, a large number of underground pipelines need to be constructed in areas with heavy traffic and numerous ground buildings, and a trenchless construction method is mostly adopted to reduce the influence on the surrounding environment.
The main common method for trenchless pipeline burying construction is a dragging pipe and jacking pipe construction process adopting a horizontal guide drilling machine. The construction of horizontal guide drilling drag pipe is characterized by that firstly, it adopts guide drilling machine to drill a guide hole which is approximately horizontal from one end of pipeline and a certain depth from ground surface, then after the guide drilling bit a reverse reaming bit and a rotary joint are connected, and make pull-back reaming drilling, and finally after the reaming drilling is completed, after the rotary joint a drag head and the pipeline to be laid are connected, and make reverse reaming and pipe laying so as to implement laying of pipeline
For example, the Chinese patent application (publication number: CN108916469A) discloses a construction method for continuous operation of a small-caliber pipeline in 2018, wherein the equipment position of a miniature push bench is determined by using a vertical line and a measuring tape; the method comprises the following steps of transporting a miniature push bench and a matching system into a construction site, carrying out equipment installation and debugging, filling concrete between a top back plate and a well wall after the push bench is installed and adjusted, then carrying out laser theodolite installation and debugging, and then penetrating a pilot pipe through an opening to jack the pilot pipe to a preset route. In the construction method, the installation of the pipe jacking machine is important, the stability and firmness of the installation of the pipe jacking machine can influence the accuracy of the whole follow-up pipe jacking construction, the installation accuracy and the stability are improved, the convenience is also considered, and the installation and the disassembly of various devices are facilitated. In addition, discontinuity still exists in the jacking and disassembling process of the construction method, and the construction efficiency needs to be further improved.
Disclosure of Invention
The invention aims to provide a construction method of a miniature jacking pipe of an ecological comprehensive pipe gallery project, aiming at the problems in the prior art.
In order to achieve the purpose, the invention adopts the technical scheme that:
a construction method of a miniature jacking pipe of an ecological comprehensive pipe gallery project comprises the following construction steps:
the method comprises the steps that firstly, a miniature pipe jacking machine is installed and debugged, the miniature pipe jacking machine comprises the steps of setting and constructing a back structure of a miniature pipe jacking, after the back structure construction is completed, a pipe jacking machine table and a machine table base are transported to the bottom of a working well, the height and the levelness of the machine table base are adjusted according to the central axis of a jacking pipeline and are fixedly installed at the bottom of the well, the pipe jacking machine table is installed on the machine table base and connected with a hydraulic oil circuit, the front end part of the pipe jacking machine table is detachably connected with a first guide pipe, and equipment is started to determine whether equipment works normally or not;
secondly, the laser theodolite is used for orientation, a laser theodolite is arranged on the central line of a pipeline in a working well, the gradient of the laser theodolite is adjusted, the laser theodolite is projected onto the guide pipe according to the designed gradient, and the laser theodolite is used for observation and alignment of jacking of the guide pipe;
thirdly, jacking a guide pipe first, wherein the guide pipe is precisely jacked according to a designed gradient through the orientation of the laser theodolite and the operation of an electronic deviation-rectifying display screen, a push bench jacks one section of the guide pipe first and then retracts, and a next section of the guide pipe first is installed until the guide pipe reaches a receiving well;
fourthly, jacking the unearthed outer pipe, installing the unearthed outer pipe after the pilot pipe reaches the receiving well, installing a spiral cutter head while jacking the unearthed outer pipe, closely connecting the spiral cutter head with the rear end of the pilot pipe, cutting the soil body through torsion, and conveying the cut soil body to the working well through the spiral cutter head;
fifthly, jacking the spiral cutter head, and carrying out installation and connection of the spiral cutter head and the unearthed outer pipe once every several meters of jacking, and continuously constructing till the spiral cutter head and the unearthed outer pipe reach the receiving well;
sixthly, jacking the reinforced concrete pipe, namely installing a conversion joint in the working well when the distance between the spiral cutter and the unearthed outer pipe is 1-2m from the receiving well, wherein one end of the conversion joint is connected with the unearthed outer pipe, and the other end of the conversion joint is in socket joint connection with the reinforced concrete pipe, then jacking the reinforced concrete pipe, and sequentially circulating until the pipe jacking is finished;
and seventhly, dismantling equipment, namely dismantling each section of the guide pipe and the soil-discharging outer pipe in a receiving well in sequence in the pipe-jacking construction process, and dismantling the spiral cutter head, the pipe-jacking machine table and the machine table base in the working well.
The miniature pipe jacking construction method for the ecological comprehensive pipe gallery engineering is simple to operate, high in pipe jacking efficiency, very convenient and quick to install and detach, good in pipe jacking accuracy and safety and suitable for rapid construction of urban ecological comprehensive pipe galleries.
After the working well and the receiving well are excavated, all devices, equipment and pipe fittings which need to be used are conveyed to the position near the ground of the working well, and after preparation work is done, pipe jacking construction is started.
The back structure can provide enough supporting strength, can bear the maximum reaction force of a pipe jacking machine (a jack) in the jacking process, is matched with the fixed arrangement of the machine table base, keeps the equipment stable in the whole jacking process, and keeps the central line of the jack on the same horizontal line better all the time.
After the base of the bench is fixed, the bench does not move in the construction process, after the bench of the push bench is installed, an oil way is communicated, the pushing and retracting operations of the oil cylinder are carried out, and the follow-up construction is started after the normal operation is ensured.
Accurate orientation can be ensured by using the laser theodolite, the guide pipe is adjusted in real time in the jacking process, the guide pipe is not deviated from the central line, and the accuracy in jacking of a follow-up pipeline is facilitated.
A plurality of processes in the fourth step, the fifth step, the sixth step and the seventh step are actually performed synchronously, when the guide pipe is pushed tightly forwards, the spiral cutter head and the outer soil discharging pipe are used for transporting out soil bodies along with operation, when the first section of outer soil discharging pipe reaches the receiving well, a channel between the two wells is opened, the guide pipe is removed section by section, the first section of outer soil discharging pipe can be removed in the receiving well, the working well continuously follows in the outer soil discharging pipe according to the construction beat, the rear end of the last section of outer soil discharging pipe is connected with the reinforced concrete pipe, along with the continuous removal of the outer soil discharging pipe in the receiving well, the reinforced concrete pipe is installed along with continuous pushing, when the reinforced concrete pipe is installed on the whole pipeline, the outer soil discharging pipe is also removed along with continuous pushing, and retracts into the spiral cutter head for removal, and the push bench machine table and the machine table base are adjusted to the ground, and the construction of the section of pipeline is completed. The whole construction process is simple to operate, the construction beat is reasonable to control, the construction speed is high, the efficiency is high, the intermediate waiting time is shortened, and inconvenience caused by centralized dismantling is avoided.
Furthermore, the back structure comprises a back steel cylinder, the back steel cylinder is perpendicular to the bottom surface of the working well, and C25 plain concrete is filled in a gap between the back steel cylinder and a back wall, so that the existence of a gap is avoided, and sufficient strength is ensured; the back end of the machine base is connected with the back steel cylinder, and the central line of the back steel cylinder is consistent with the central axis of the jacking pipeline, so that eccentric compression can be avoided.
Further, an operator uses the encrypted wire points to measure and discharge the pipeline central line and the elevation in the working well through contact, and the elevation is used for adjusting the gradient of the laser theodolite; the drill bit of pipe earlier is the inclined plane, has the measurement mark target behind the inclined plane, through the light source mirror surface mark at laser theodolite observation drill bit center, torsion rotation control arrow direction for the laser point shines the center of measuring the mark target all the time.
Furthermore, the unearthed outer pipe is a steel pipe with the same diameter as the newly-built pipeline, and soil conveyed to the working well is conveyed to the outside of the working well through a soil discharge pipe.
Furthermore, the length of each section of the spiral cutter head and the length of each section of the unearthed outer pipe are respectively 1.0-1.5 m, and the spiral cutter head and the unearthed outer pipe are installed and connected once every 1.0-1.5 m of jacking; the length of each section of reinforced concrete pipe is 1 m.
Further, first section of pipe arrives earlier behind the receiving well installation in the working well spiral cutter head with the outer tube that unearths, spiral cutter head with every section of advancing of the outer tube that unearths, first pipe is in receiving well department dismantles and retrieves a festival, circulates in proper order, and is up to spiral cutter head with the outer tube that unearths reachs the working well.
Further, after the unearthed outer pipe and the spiral cutter reach the receiving well, starting an oil cylinder to retract, bringing the spiral cutter to the working well, and disassembling and recovering the spiral cutter in the working well; the reinforced concrete pipe is pushed into the working well one section at a time, and the outer excavated pipe is disassembled and recycled one section in the receiving well until the reinforced concrete pipe reaches the receiving well; and when the reinforced concrete pipe reaches the receiving well, stopping pipe jacking, disassembling a hydraulic oil way, disassembling the pipe jacking machine table, removing the fixing of the base of the table, and hoisting to the ground under the current condition for next pipeline construction.
Because the guide pipe and the unearthed outer pipe have a guiding function, the axis and the elevation preset by the pipeline can be accurately reached without adjusting the machine head when the reinforced concrete pipe is jacked. And in the jacking process, the control of the axis and the elevation is paid attention to in real time, and the surveying personnel carries out retest every 1 section of jacking, feeds back data in time and corrects the deviation in time.
Furthermore, the machine table base comprises a pair of cross rods which are arranged in parallel, and a pair of adjustable support frames are respectively arranged below the pair of cross rods; supporting legs are arranged at the end parts of the supporting frames, a plurality of adjusting pads are arranged below the supporting legs, and anchoring parts for fastening are further arranged on the supporting legs; lifting rings are respectively arranged above the supporting frames; a plurality of vertical mounting holes are formed in the cross rod at intervals, and the push bench is detachably mounted on the cross rod and the mounting holes; the end parts of the pair of cross rods are also detachably provided with connecting rods, the middle parts of the connecting rods are provided with horizontal connecting holes, and the horizontal connecting holes are internally sleeved with the guide tubes.
The structure of the machine base is simple and stable, the machine base is easy to hoist and construct, the machine base can be stably and horizontally installed in the well bottom, the machine table of the pipe jacking machine can be stably installed on the machine base, the machine base and the machine table of the pipe jacking machine can be guaranteed not to shake in construction engineering, and the accuracy of pipe jacking construction is improved.
The arrangement of the cross rods and the mounting holes above the cross rods is convenient for mounting and fixing the push bench, and the corresponding mounting holes can be selected according to the size of the push bench and the actual required placement position for connection and mounting.
The height position of the cross rod can be adjusted by arranging the adjustable support frame, so that the push bench machine table and the pilot pipe can be adjusted at different height positions, and the application range of the push bench machine table and the pilot pipe is improved; the adjustment can be completed by sliding the sliding rod sleeved in the supporting frame, and the locking limiting piece is arranged to fix the sliding rod at a required height position; the supporting legs with the setting of anchor assembly can be with its firm fixing at the bottom of a pit, the setting of adjusting pad can finely tune the height, in order to guarantee the level of horizontal pole, and a pair of the horizontal pole is in same height, is favorable to improving the accuracy of push pipe construction like this.
The connecting rod with the setting of horizontal connecting hole is convenient for the horizontal preinstallation first pipe, also can demolish in the work progress first pipe with the connecting rod makes things convenient for the installation and the use of other parts. The hanging ring is arranged on the support frame, so that interference can be avoided, and the motion of a part on the cross rod is not influenced; meanwhile, the whole device is convenient to hoist.
One preset process of the position of the catheter in advance is: after the installation of board base finishes, when the push bench board has not been installed, will this moment the connecting rod is connected the tip of horizontal pole, will the guide's headgear of first pipe is established on the connecting rod, the laser theodolite sets up at the rear, and is a pair of do not shelter from between the horizontal pole, the laser that the laser theodolite sent can directly reach on the mark target of first pipe, make it be located the central line through the timing on, fixed this moment the guide's head of first pipe keeps motionless, treats push bench board installation finishes the back, the board is connected the body of first pipe and with the guide's head joint location of first pipe confirms good position after, dismantles connecting rod and guide's head, reconnects the guide ' head, the top is started to advance, and the linking of follow-up out native outer tube and reinforced concrete pipe just can not blockked by the connecting rod.
Furthermore, the support frames are respectively welded on the outer sides of the cross rods, and reinforcing plates are respectively welded between the support frames and the side walls of the cross rods; the end parts of one ends of the cross rods, which are far away from the first guide pipe, are connected with arc-shaped back steel cylinders.
The tip of horizontal pole is equipped with the interface, can with back steel cylinder can dismantle and be connected, and the fastening back can be for the horizontal pole provides sufficient recoil supporting force, keeps the stability of whole push pipe in-process.
Furthermore, a hydraulic jack is arranged in the middle of the push bench platform, a first installation arm for installation is arranged on the periphery of the push bench platform, a second installation arm is arranged at the front end of the push bench platform, and a hydraulic rod is connected between the first installation arm and the second installation arm.
Compared with the prior art, the invention has the beneficial effects that: 1. the micro pipe-jacking construction method for the ecological comprehensive pipe gallery engineering is simple to operate, high in pipe-jacking efficiency, very convenient and quick to install and detach, good in pipe-jacking accuracy and safety and suitable for quick construction of urban ecological comprehensive pipe galleries; 2. the whole construction process is simple to operate, the construction time is reasonable to control, the construction speed is high, the efficiency is high, the intermediate waiting time is reduced, and inconvenience caused by centralized dismantling is avoided; 3. the back structure can provide enough supporting strength, can bear the maximum reaction force of a pipe jacking machine (a jack) in the jacking process, and is matched with the fixed arrangement of the machine table base, so that the stability of equipment is kept in the whole jacking process, and the central line of the jack is always kept on the same horizontal line better; 4. the bench base is simple and stable in structure and easy to hoist and construct, and can be stably and horizontally installed in a well bottom, and the bench of the pipe jacking machine can also be stably installed on the bench base, so that the bench base and the bench of the pipe jacking machine can be prevented from shaking in the construction engineering, and the accuracy of pipe jacking construction can be improved.
Drawings
FIG. 1 is a process flow diagram of a construction method of a micro pipe jacking for an ecological comprehensive pipe gallery project;
FIG. 2 is a schematic structural diagram of a machine base in the micro pipe jacking construction method for the ecological comprehensive pipe gallery project of the invention;
FIG. 3 is a schematic structural view of a guide pipe in the construction method of the ecological comprehensive pipe gallery engineering micro top pipe;
FIG. 4 is a schematic view of a measurement target on a catheter according to the present invention;
FIG. 5 is a schematic top view of the jacking of the pilot pipe in the construction method of the micro jacking pipe of the ecological comprehensive pipe gallery project;
FIG. 6 is a schematic front view of the jacking of a pilot pipe in the construction method of the micro jacking pipe of the ecological comprehensive pipe gallery project;
in the figure: 1. a machine base; 2. a push bench machine bench; 3. a laser theodolite; 4. firstly, guiding a pipe; 401. a leading head; 402. a pipe body; 403. measuring a target; 5. a cross bar; 501. mounting holes; 6. a support frame; 601. a support sleeve; 602. a slide bar; 7. supporting legs; 8. an anchoring member; 9. a hoisting ring; 10. a reinforcing plate; 11. a connecting rod; 12. a back steel cylinder; 13. a first mounting arm; 14. a second mounting arm; 15. a hydraulic lever; 16. a conditioning pad; 17. a level bubble gauge; 18. a reinforcing rod.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "middle", "upper", "lower", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The first embodiment is as follows:
referring to fig. 1, a construction method of a micro pipe jacking for an ecological comprehensive pipe gallery project comprises the following construction steps:
the method comprises the steps that firstly, a miniature pipe jacking machine is installed and debugged, the miniature pipe jacking machine comprises the steps of setting and constructing a back structure of a miniature pipe jacking, after the back structure construction is completed, a pipe jacking machine table and a machine table base are transported to the bottom of a working well, the height and the levelness of the machine table base are adjusted according to the central axis of a jacking pipeline and are fixedly installed at the bottom of the well, the pipe jacking machine table is installed on the machine table base and connected with a hydraulic oil circuit, the front end part of the pipe jacking machine table is detachably connected with a first guide pipe, and equipment is started to determine whether equipment works normally or not;
secondly, the laser theodolite is used for orientation, a laser theodolite is arranged on the central line of a pipeline in a working well, the gradient of the laser theodolite is adjusted, the laser theodolite is projected onto the guide pipe according to the designed gradient, and the laser theodolite is used for observation and alignment of jacking of the guide pipe;
thirdly, jacking a guide pipe first, wherein the guide pipe is precisely jacked according to a designed gradient through the orientation of the laser theodolite and the operation of an electronic deviation-rectifying display screen, a push bench jacks one section of the guide pipe first and then retracts, and a next section of the guide pipe first is installed until the guide pipe reaches a receiving well;
fourthly, jacking the unearthed outer pipe, installing the unearthed outer pipe after the pilot pipe reaches the receiving well, installing a spiral cutter head while jacking the unearthed outer pipe, closely connecting the spiral cutter head with the rear end of the pilot pipe, cutting the soil body through torsion, and conveying the cut soil body to the working well through the spiral cutter head;
fifthly, jacking the spiral cutter head, and carrying out installation and connection of the spiral cutter head and the unearthed outer pipe once every several meters of jacking, and continuously constructing till the spiral cutter head and the unearthed outer pipe reach the receiving well;
sixthly, jacking the reinforced concrete pipe, namely installing a conversion joint in the working well when the spiral cutter head and the unearthed outer pipe are 1-2m away from the receiving well, wherein one end of the conversion joint is connected with the unearthed outer pipe, the other end of the conversion joint is in socket joint connection with the reinforced concrete pipe, then jacking the reinforced concrete pipe, and sequentially circulating until the pipe jacking is finished;
and seventhly, dismantling equipment, namely dismantling each section of the guide pipe and the unearthed outer pipe in a receiving well in sequence in the pipe jacking construction process, and dismantling the spiral cutter head, the pipe jacking machine table and the table base in the working well.
The miniature pipe jacking construction method for the ecological comprehensive pipe gallery engineering is simple to operate, high in pipe jacking efficiency, very convenient and quick to install and detach, good in pipe jacking accuracy and safety and suitable for rapid construction of urban ecological comprehensive pipe galleries.
After the working well and the receiving well are excavated, all devices, equipment and pipe fittings which need to be used are conveyed to the position near the ground of the working well, and after preparation work is done, pipe jacking construction is started.
The back structure can provide enough supporting strength, can bear the maximum reaction force of a pipe jacking machine (a jack) in the jacking process, is matched with the fixed arrangement of the machine table base, keeps the equipment stable in the whole jacking process, and keeps the central line of the jack on the same horizontal line all the time better.
After the base of the bench is fixed, the bench does not move in the construction process, after the bench of the push bench is installed, an oil way is communicated, the pushing and retracting operations of the oil cylinder are carried out, and the follow-up construction is started after the normal operation is ensured.
Accurate orientation can be ensured by using the laser theodolite, the guide pipe is adjusted in real time in the jacking process, the guide pipe is not deviated from the central line, and the accuracy in jacking of a follow-up pipeline is facilitated.
The setting of the first step to the seventh step does not limit that the construction is carried out in the backward sequence, and a plurality of processes in the fourth step, the fifth step, the sixth step and the seventh step are actually carried out synchronously, for example, when the guide pipe is pushed tightly forward, the spiral cutter head and the outer soil pipe are carried out along with the operation, when the first section of the outer soil pipe reaches the receiving well, the passage between the two wells is opened, at the moment, the guide pipe is dismantled section by section, the first section of the outer soil pipe can be dismantled in the receiving well, the working well continues to follow the outer soil pipe according to the construction beat, the rear end of the last section of the outer soil pipe is connected with the reinforced concrete pipe, along with the continuous dismantling of the outer soil pipe in the receiving well, the reinforced concrete pipe is installed along with the continuous jacking, and when the reinforced concrete pipe is installed in the whole pipeline, and the unearthed outer pipe is also disassembled, the spiral cutter head is retracted for disassembling, and the push bench and the bench base are adjusted to the ground, so that the construction of the section of pipeline is completed. The whole construction process is simple to operate, the construction beat is reasonable to control, the construction speed is high, the efficiency is high, the intermediate waiting time is shortened, and inconvenience caused by centralized dismantling is avoided.
Furthermore, the back structure comprises a back steel cylinder, the back steel cylinder is perpendicular to the bottom surface of the working well, and C25 plain concrete is filled in a gap between the back steel cylinder and a back wall, so that the existence of a gap is avoided, and sufficient strength is ensured; the back end of the machine base is connected with the back steel cylinder, and the central line of the back steel cylinder is consistent with the central axis of the jacking pipeline, so that eccentric compression can be avoided.
Further, an operator uses the encrypted wire points to measure and discharge the pipeline central line and the elevation in the working well through contact, and the elevation is used for adjusting the gradient of the laser theodolite; the drill bit of pipe earlier is the inclined plane, has the measurement mark target behind the inclined plane, through the light source mirror surface mark at laser theodolite observation drill bit center, torsion rotation control arrow direction for the laser point shines the center of measuring the mark target all the time.
Furthermore, the unearthed outer pipe is a steel pipe with the same diameter as the newly-built pipeline, and soil conveyed to the working well is conveyed to the outside of the working well through a soil discharge pipe.
Furthermore, the length of each section of the spiral cutter head and the length of each section of the unearthed outer pipe are respectively 1.2m, and the spiral cutter head is connected with the unearthed outer pipe once every 1.2m of jacking; the length of each section of reinforced concrete pipe is 1.2 m.
Further, first section of pipe arrives earlier behind the receiving well installation in the working well spiral cutter head with the outer tube that unearths, spiral cutter head with every section of advancing of the outer tube that unearths, first pipe is in receiving well department dismantles and retrieves a festival, circulates in proper order, and is up to spiral cutter head with the outer tube that unearths reachs the working well.
Further, after the unearthed outer pipe and the spiral cutter reach the receiving well, starting an oil cylinder to retract, bringing the spiral cutter to the working well, and disassembling and recovering the spiral cutter in the working well; the reinforced concrete pipe is pushed into the working well one section at a time, and the outer excavated pipe is disassembled and recycled one section in the receiving well until the reinforced concrete pipe reaches the receiving well; and when the reinforced concrete pipe reaches the receiving well, stopping pipe jacking, disassembling a hydraulic oil way, disassembling the pipe jacking machine table, removing the fixing of the base of the table, and hoisting to the ground under the current condition for next pipeline construction.
Because the guide pipe and the unearthed outer pipe have a guiding function, the axis and the elevation preset by the pipeline can be accurately reached without adjusting the machine head when the reinforced concrete pipe is jacked.
Example two:
the embodiment provides a machine base structure and a specific construction process of the first step.
As shown in fig. 2, the machine base 1 includes a pair of cross bars 5 arranged in parallel, and a pair of adjustable supporting frames 6 are respectively disposed below the pair of cross bars 5; supporting legs 7 are arranged at the end parts of the supporting frames 6, a plurality of adjusting pads 16 are arranged below the supporting legs 7, and anchoring parts 8 for fastening are further arranged on the supporting legs 7; lifting rings 9 are respectively arranged above the supporting frames 6; a plurality of vertical mounting holes 501 are formed in the cross rod 5 at intervals, and the push bench machine table 2 is detachably mounted on the cross rod 5 and the mounting holes 501; the end parts of the pair of cross rods 5 are also detachably provided with connecting rods 11, the middle parts of the connecting rods 11 are provided with horizontal connecting holes, and the first guide pipes 4 are sleeved in the horizontal connecting holes.
The structure of the machine base 1 is simple and stable, the machine base is easy to hoist and construct, the machine base can be stably installed in the well bottom, the pipe jacking machine table 2 can be stably installed on the machine base 1, the machine base 1 and the pipe jacking machine table 2 cannot shake in the construction engineering, and the accuracy of pipe jacking construction is improved.
The arrangement of the cross rods 5 and the mounting holes 501 above the cross rods is convenient for mounting and fixing the push bench machine table 2, and the corresponding mounting holes can be selected according to the size of the push bench machine table 2 and the required placement position in practice for connection and mounting.
The adjustable support frame 6 is arranged, so that the height position of the cross rod 5 can be adjusted, the push bench machine table 2 and the pilot pipe 4 can be adjusted at different height positions, and the application range of the push bench machine table is widened; the adjustment can be completed by sliding the sliding rod 602 sleeved in the supporting sleeve 601 of the supporting frame 6, and a locking limit piece is arranged to fix the sliding rod at a required height position; the supporting legs 7 with the setting of anchor assembly 8 can be with its firm fixing at the bottom of a pit, the setting of adjusting pad 16 can finely tune the height, in order to guarantee the level of horizontal pole 5, and a pair of horizontal pole 5 is in same height, is favorable to improving the accuracy of push pipe construction like this. The lifting ring 9 is arranged on the supporting sleeve 601, so that interference can be avoided, and the movement of a part on the cross rod 5 is not influenced; meanwhile, the whole device is convenient to hoist.
The connecting rod 11 and the horizontal connecting hole are arranged, so that the horizontal pre-installation of the guide pipe 4 is facilitated, the guide pipe 4 and the connecting rod 11 can be detached in the construction process, and the installation and the use of other parts are facilitated. The illustrated guide tube 4 includes a guide head 401, and a tube 402 is screwed to an end of the guide head 401, a measurement target 403 is disposed in the guide head 401, and a center point of the measurement target 403 is located on a central axis of the guide tube 4.
One preset procedure for the position of the foreline 4 is: referring to fig. 2 to 6, after the installation of the machine base 1 is completed, when the machine bench 2 is not installed, the connecting rod 11 is connected to the end of the cross rod 5, the guide head 401 of the guide pipe 4 is sleeved on the connecting rod 11, the laser theodolite 3 is arranged at the rear, a pair of cross rods 5 are not shielded, the laser emitted by the laser theodolite 3 can directly reach the measuring target 403 in the guide head 401, the measuring target is positioned on the center line through adjustment and calibration, the guide head 401 of the guide pipe 4 is fixed at the time, after the installation of the machine bench 2 is completed, the machine bench is connected with the pipe body 402 of the guide pipe 4, the pipe body 402 is connected and positioned with the guide head 401, the connecting rod 11 and the guide head 401 are detached after the position is determined, and then the guide head 401 is reconnected to start jacking, the connection between the outer pipe and the reinforced concrete pipe after the soil discharging can not be blocked by the connecting rod 11. The connecting rod 11 plays a supporting role in the process of pre-fixing and positioning the guide tube 4.
Further, the support frames 6 are respectively welded on the outer sides of the cross rods 5, and reinforcing plates 10 are respectively welded between the support frames 6 and the side walls of the cross rods 5; the ends of the cross rods 5 far away from the first guide pipe 4 are connected with arc-shaped back steel cylinders 12.
The tip of horizontal pole 5 is equipped with the interface, can with back steel cylinder 12 can dismantle the connection, and the fastening back can be for horizontal pole 5 provides sufficient recoil supporting force, keeps the stability of whole push pipe in-process.
Furthermore, a hydraulic jack is arranged in the middle of the push bench machine table 2, a first installation arm 13 for installation is arranged on the periphery of the push bench machine table 2, a second installation arm 14 is arranged at the front end of the push bench machine table, and a hydraulic rod 15 is connected between the first installation arm 13 and the second installation arm 14. The middle part of the second mounting arm 14 is provided with a through hole coaxial with the central axis, so that the pipe body, the unearthed outer pipe and the reinforced concrete pipe can conveniently penetrate through the through hole.
Further, a leveling bubble gauge 17 is respectively arranged on the outer side walls of the pair of cross rods 5. In the installation and construction process, the levelness of the cross rod 5 can be obtained in real time through the level bubble gauge 17, and the levelness of the whole device can be conveniently controlled by combining the adjustable support frame 6 and the adjusting pad 16.
Furthermore, a reinforcing rod 18 is further arranged between the pair of support sleeves 601, and the reinforcing rod 18 is arranged at a position close to the lower part, so that the support and connection stability of the support frame 6 can be further improved, and the installation and movement of various components arranged on the cross rod 5 are not influenced.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (9)
1. A construction method of a miniature jacking pipe of an ecological comprehensive pipe gallery project is characterized by comprising the following construction steps:
the method comprises the steps that firstly, a miniature pipe jacking machine is installed and debugged, the miniature pipe jacking machine comprises the steps of setting and constructing a back structure of a miniature pipe jacking, after the back structure construction is completed, a pipe jacking machine table and a machine table base are transported to the bottom of a working well, the height and the levelness of the machine table base are adjusted according to the central axis of a jacking pipeline and are fixedly installed at the bottom of the well, the pipe jacking machine table is installed on the machine table base and connected with a hydraulic oil circuit, the front end part of the pipe jacking machine table is detachably connected with a first guide pipe, and equipment is started to determine whether equipment works normally or not;
the machine table base comprises a pair of cross rods which are arranged in parallel, and a pair of adjustable supporting frames are respectively arranged below the pair of cross rods; supporting legs are arranged at the end parts of the supporting frames, a plurality of adjusting pads are arranged below the supporting legs, and anchoring parts for fastening are further arranged on the supporting legs; lifting rings are respectively arranged above the supporting frames; a plurality of vertical mounting holes are formed in the cross rod at intervals, and the push bench is detachably mounted on the cross rod and the mounting holes; the end parts of the pair of cross rods are also detachably provided with connecting rods, the middle parts of the connecting rods are provided with horizontal connecting holes, and the horizontal connecting holes are internally sleeved with the guide tubes;
secondly, the laser theodolite is used for orientation, a laser theodolite is arranged on the central line of a pipeline in a working well, the gradient of the laser theodolite is adjusted, the laser theodolite is projected onto the guide pipe according to the designed gradient, and the laser theodolite is used for observation and alignment of jacking of the guide pipe;
thirdly, jacking a guide pipe first, wherein the guide pipe is precisely jacked according to a designed gradient through the orientation of the laser theodolite and the operation of an electronic deviation-rectifying display screen, a push bench jacks one section of the guide pipe first and then retracts, and a next section of the guide pipe first is installed until the guide pipe reaches a receiving well;
fourthly, jacking the unearthed outer pipe, installing the unearthed outer pipe after the pilot pipe reaches the receiving well, installing a spiral cutter head while jacking the unearthed outer pipe, closely connecting the spiral cutter head with the rear end of the pilot pipe, cutting the soil body through torsion, and conveying the cut soil body to the working well through the spiral cutter head;
fifthly, jacking the spiral cutter head, and carrying out installation and connection of the spiral cutter head and the unearthed outer pipe once every several meters of jacking, and continuously constructing till the spiral cutter head and the unearthed outer pipe reach the receiving well;
sixthly, jacking the reinforced concrete pipe, namely installing a conversion joint in the working well when the distance between the spiral cutter and the unearthed outer pipe is 1-2m from the receiving well, wherein one end of the conversion joint is connected with the unearthed outer pipe, and the other end of the conversion joint is in socket joint connection with the reinforced concrete pipe, then jacking the reinforced concrete pipe, and sequentially circulating until the pipe jacking is finished;
and seventhly, dismantling equipment, namely dismantling each section of the guide pipe and the soil-discharging outer pipe in a receiving well in sequence in the pipe-jacking construction process, and dismantling the spiral cutter head, the pipe-jacking machine table and the machine table base in the working well.
2. The ecological comprehensive pipe gallery engineering micro pipe jacking construction method according to claim 1, wherein the back structure comprises a back steel cylinder, the back steel cylinder is arranged perpendicular to the bottom surface of the working well, and a gap between the back steel cylinder and a back wall is filled with C25 plain concrete; the back end of the machine base is connected with the back steel cylinder, and the central line of the back steel cylinder is consistent with the central axis of the jacking pipeline.
3. The ecological comprehensive pipe gallery engineering micro pipe jacking construction method according to claim 1, characterized in that a pipeline center line and an elevation in the working well are discharged by an operator through contact measurement by using encrypted wire points, and the gradient of the laser theodolite is adjusted by using the elevation; the drill bit of pipe earlier is the inclined plane, has the measurement mark target behind the inclined plane, through the light source mirror surface mark at laser theodolite observation drill bit center, torsion rotation control arrow direction for the laser point shines the center of measuring the mark target all the time.
4. The micro pipe-jacking construction method for the ecological comprehensive pipe gallery engineering according to claim 1, wherein the unearthed outer pipe is a steel pipe with the same pipe diameter as that of a newly-built pipeline, and soil conveyed into the working well is conveyed out of the working well through a soil discharge pipe.
5. The ecological comprehensive pipe gallery engineering micro pipe jacking construction method according to claim 1, characterized in that the length of each section of the spiral cutterhead and each section of the unearthed outer pipe is 1.0-1.5 meters respectively, and the installation connection of the spiral cutterhead and the unearthed outer pipe is performed once every 1.0-1.5 meters of jacking; the length of each section of reinforced concrete pipe is 1 m.
6. The micro pipe-jacking construction method for the ecological comprehensive pipe gallery engineering according to claim 1, wherein after the first section of the first guide pipe reaches the receiving well, the spiral cutter head and the unearthed outer pipe are installed in the working well, each section of the spiral cutter head and the unearthed outer pipe is pushed into the working well, and the first guide pipe is detached and recovered at the receiving well and sequentially circulated until the spiral cutter head and the unearthed outer pipe reach the working well.
7. The ecological comprehensive pipe gallery engineering micro pipe jacking construction method according to claim 1, wherein after the unearthed outer pipe and the spiral cutter reach the receiving well, an oil cylinder is started to retract, the spiral cutter is brought to the working well, and the spiral cutter is disassembled and recovered in the working well; the reinforced concrete pipe is pushed into the working well one section at a time, and the outer excavated pipe is disassembled and recycled one section in the receiving well until the reinforced concrete pipe reaches the receiving well; and when the reinforced concrete pipe reaches the receiving well, stopping pipe jacking, disassembling a hydraulic oil way, disassembling the pipe jacking machine table, removing the fixing of the base of the table, and hoisting to the ground under the current condition for next pipeline construction.
8. The ecological comprehensive pipe gallery engineering micro pipe jacking construction method according to claim 1, wherein the support frames are respectively welded to the outer sides of the cross rods, and reinforcing plates are respectively welded between the support frames and the side walls of the cross rods; the end parts of one ends of the cross rods, which are far away from the first guide pipe, are connected with arc-shaped back steel cylinders.
9. The micro pipe-jacking construction method for the ecological comprehensive pipe gallery engineering according to claim 1, wherein a hydraulic jack is arranged in the middle of a pipe-jacking machine platform, a first mounting arm for mounting is arranged on the periphery of the pipe-jacking machine platform, a second mounting arm is arranged at the front end of the pipe-jacking machine platform, and a hydraulic rod is connected between the first mounting arm and the second mounting arm.
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| CN103343691A (en) * | 2013-07-25 | 2013-10-09 | 湖南大学 | Posture adjusting device of minitype shield tunneling machine |
| CN107664038A (en) * | 2017-10-18 | 2018-02-06 | 安徽路鼎科技股份有限公司 | Bore top machine and thirdly step push bench process |
| CN108916469A (en) * | 2018-07-19 | 2018-11-30 | 深圳市工勘岩土集团有限公司 | The construction method that small-bore pipeline is worked continuously |
| CN109899080A (en) * | 2019-04-11 | 2019-06-18 | 中铁工程装备集团有限公司 | A kind of miniature push pipe formula development machine |
| CN209704573U (en) * | 2019-04-11 | 2019-11-29 | 中铁工程装备集团有限公司 | Miniature push pipe formula development machine |
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