CN113464721A - Low-noise vibration-reduction slot-opening-free construction method and device for tunnel jacking pipe - Google Patents
Low-noise vibration-reduction slot-opening-free construction method and device for tunnel jacking pipe Download PDFInfo
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- CN113464721A CN113464721A CN202111019642.2A CN202111019642A CN113464721A CN 113464721 A CN113464721 A CN 113464721A CN 202111019642 A CN202111019642 A CN 202111019642A CN 113464721 A CN113464721 A CN 113464721A
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- 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
- F16L1/036—Laying or reclaiming pipes on land, e.g. above the ground in the ground the pipes being composed of sections of short length
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/06—Foundation trenches ditches or narrow shafts
- E02D17/08—Bordering or stiffening the sides of ditches trenches or narrow shafts for foundations
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- E—FIXED CONSTRUCTIONS
- E21—EARTH 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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- 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
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- 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
- F16L1/10—Accessories therefor, e.g. anchors for aligning
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- 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
- F16L1/11—Accessories therefor, e.g. anchors for the detection or protection of pipes in the ground
Abstract
The invention discloses a low-noise vibration-reduction slot-opening-free construction method and a device for a tunnel jacking pipe, wherein the construction method comprises the following steps: firstly, construction preparation; secondly, construction operation of a working well and a receiving well; advancing small guide pipe grouting operation; step four, auxiliary operation equipment installation; fifthly, checking and processing the pipeline; sixthly, jacking and rectifying the deviation of the pipeline; seventhly, sealing the top pipe after the top pipe is in place; the construction device for implementing the steps comprises a supporting seat, one side of the supporting seat is provided with one or more linear driving mechanisms, one end of each linear driving mechanism is provided with a mouth protecting plate, a laser emitter is arranged on each mouth protecting plate, and light emitted by the laser emitter coincides with the axis of the pipeline. The underground pipeline laying operation is implemented under the condition that the ground building is not damaged by the implementation mode, and the underground pipeline laying operation system has the advantages of high operation efficiency, low noise, low vibration cost and strong practicability.
Description
Technical Field
The invention relates to the technical field of construction of underground pipelines of buildings, in particular to a low-noise vibration-reduction slot-opening-free construction method and device for a tunnel jacking pipe.
Background
With the continuous expansion of cities, various municipal pipe network projects such as underground gas pipelines, rain and sewage pipelines, electric power and communication and the like need to dig tunnels underground when passing through urban buildings and roads, and in the process of developing and utilizing underground spaces at the present stage, usually, the construction mode of directly excavating by engineering machinery or manually excavating is adopted, the construction mode has the disadvantages of low efficiency, large noise, but also the ground building environment is damaged, the cost is high, the pipe jacking construction is a technical means which is often applied to solve the technical problem, when the pipe jacking construction is carried out at the lower part of the existing roadbed, the jacking of the jacking pipe can cause great influence on the roadbed structure at the upper part of the jacking pipe and even cause the integral deviation of the soil body at the upper part of the jacking pipe structure, further, the structure of the upper part is affected, and the large shield equipment cannot be applied to such construction work due to the limited size of the underground space.
Disclosure of Invention
The invention aims to provide a low-noise vibration-reduction open-groove-free construction method and device for a tunnel jacking pipe.
In order to achieve the purpose, the invention adopts the following technical scheme:
a low-noise vibration-reduction slot-opening-free construction method for a tunnel jacking pipe comprises the following steps: firstly, construction preparation; secondly, construction operation of a working well and a receiving well; advancing small guide pipe grouting operation; step four, auxiliary operation equipment installation; fifthly, checking and processing the pipeline; sixthly, jacking and rectifying the deviation of the pipeline; seventhly, sealing the top pipe after the top pipe is in place;
the specific implementation process of the first step is as follows: establishing a ground level point, guiding the relative elevation of the pipeline to a level base, transmitting and guiding the elevation of a ground elevation control point to the bottom of the pipeline through two level gauges, and determining a pipeline control elevation; preparing a 100KW silent diesel generator set as a power source for construction operation;
the specific implementation process of the second step is as follows: excavating a working well and a receiving well according to a preset operation position, spraying cement mortar on the surfaces of the excavated working well and the excavated receiving well for reinforcement and protection, installing protective nets at the outer edges of the working well and the receiving well, arranging drainage ditches outside the protective nets, reserving a ingate of the ingate after the excavation construction of the working well and the receiving well reaches the arch crown elevation of the ingate, performing annular sealing treatment at the reserved ingate of the ingate, and continuing downward construction after the sealing treatment;
the third step is implemented by the following specific steps: manufacturing small advanced catheters, cutting a steel pipe into the length of 2000-5000 mm, manufacturing one end of the steel pipe into a conical shape with the length of 300mm, welding a phi 6 steel bar hoop at a position 100mm away from the other end, not forming a hole 1000mm away from one end of the steel bar hoop, arranging 6mm grout overflow holes in the rest part at intervals of 200mm quincunx, and uniformly distributing a plurality of small advanced catheters along the circumferential direction outside a horse-head door opening; preparing grouting raw materials, namely mixing common portland cement and a retarder for use, wherein the weight ratio of water to cement is (1-1.5): 1, mixing amount of retarder is 1-3%; the advanced small duct grouting operation is carried out, YT-28 air drill is used for drilling a guide hole, or sand and stone are blown out by a blow pipe to form a hole with the approximate diameter of 50mm, the advanced small duct is inserted, the sand and stone in a pipeline are fished out and/or blown out, the periphery of the duct is plugged by plastic cement, an orifice is plugged by cotton yarn, grouting is started, the lap joint length of each circulation grouting is 1000mm, in the process of grouting the advanced small duct, the pressure gradually rises, the flow gradually falls, when the pressure reaches the grouting final pressure, the grouting amount reaches more than 80% of the standard grouting amount, the hole grouting can be finished, or the grouting pressure cannot reach the design final pressure, the grouting amount reaches the design grouting amount, no slurry leakage phenomenon exists, and the hole grouting can also be finished;
the specific implementation process of the step four is as follows: mounting a support plate, vertically mounting the support plate on the back seat wall, wherein the support plate is made of steel, and the height, the width and the thickness of the support plate are 2m multiplied by 2.5m multiplied by 80 mm; mounting a track, wherein when the bottom of the working well and the receiving well is sealed, the track is embedded in the concrete, and the height of the top surface of the track is about 10mm higher than the upper surface of the concrete; the guide rails are installed, the two guide rails are straight, parallel and equal in height, the guide rails are firmly installed, and the longitudinal slope of the guide rails is consistent with the design slope of the pipeline;
the concrete implementation process of the step five is as follows: checking the appearance of the pipeline, requiring no damage and longitudinal cracks, smoothly and vertically arranging the end faces, performing modified paraffin treatment outside the pit according with the requirements, and then hoisting the pit to a guide rail of a working well by using a crane to be in place; measuring the pipe bottom elevations of the center and the front and rear ends of the measuring pipeline after the pipe bottom elevations are in place, and performing jacking after the pipe bottom elevations are installed;
the specific implementation process of the step six is as follows: manually excavating soil at the front end inside the pipeline, manually excavating soil, simultaneously jacking the pipeline by equipment, transporting the pipeline to a tail end working well by a small climbing vehicle after excavating, hoisting the pipeline to the ground by a crane for storage, measuring the elevation of the pipe bottom at two ends of the pipeline once when the pipeline is jacked by 300-500 mmmm in the jacking process, correcting the jacking angle when the elevation of two ends of the pipeline is out of tolerance, measuring the elevation of the pipe bottom at two ends of the pipeline once when the pipeline is jacked by 100-200 mm in the correcting process, and continuously jacking the pipeline after correcting;
the specific implementation process of the seventh step is as follows: and sealing and cleaning the pipe after the jacking pipe is pushed in place, opening all pipe opening joints by adopting asbestos cement, cleaning the interior of the pipeline after opening is finished, grouting and filling the outer wall of the pipe, filling the space of the outer wall of the pipe with plain cement slurry, sealing the grouting opening after the space of the outer wall of the pipe is filled with the plain cement slurry, and finally cleaning the inspection and delivery work.
Preferably, in the second step, four vertical connecting steel bars are additionally arranged on two sides of the ingate respectively when the ingate of the ingate is subjected to annular sealing treatment, the concrete spraying thickness is reduced to 10-15 cm, two densely-arranged gully grids are arranged on the ingate, and the additional steel bars are welded with the cut horizontal steel grids of the vertical shaft into a whole.
Preferably, the outer diameter of the steel pipe in the third step is 40mm, the wall thickness is 4mm, the length of the steel pipe is 3500mm, the circumferential interval is 300mm, and the circumferential arch opening angle of the plurality of advanced small ducts is 120-180 degrees.
Preferably, the retarder in the third step is disodium hydrogen phosphate, and the strength grade of the portland cement is not lower than 32.5.
Preferably, an inner piston ring is arranged in the front three-section pipeline pushed in the sixth step, the inner piston ring and the inner wall of the pipeline are tightly clamped by a wood wedge, the inner piston ring is made of steel, and the width of the inner piston ring is not less than 200 mm.
Preferably, the deviation correcting method in the sixth step is an over-excavation deviation correcting method or a top wood deviation correcting method, wherein the over-excavation deviation correcting method is adopted when the height difference of two ends of the pipeline is between 10mm and 20mm, and the top wood deviation correcting method is adopted when the height difference of two ends of the pipeline is more than 20 mm; the overexcavation deviation rectifying method is characterized by that it adopts proper overexcavation on the reverse side of deviation of pipeline, and does not use overexcavation or even leave ridge on the deviation side to form resistance force, so that the overexcavation side with small resistance force can be deviated in the course of pushing pipe, and can gradually return to the designed position.
Preferably, in the sixth step, thixotropic slurry is injected into a gap between the pipe wall and the soil wall in the jacking process to form a slurry sleeve, so that the frictional resistance between the pipe wall and the soil wall is reduced.
The utility model provides a low noise shock attenuation exempts from to open slot type construction equipment of tunnel push pipe, includes the supporting seat, supporting seat one side is equipped with one or more sharp actuating mechanism, the guard plate is installed to sharp actuating mechanism one end, is equipped with laser emitter on the guard plate, the light and the coincidence of pipeline axis that laser emitter jetted out.
Preferably, the linear driving mechanism is a hydraulic cylinder, the number of the hydraulic cylinders is three, and three hydraulic cylinder mounting points are located at three vertexes of the regular triangle.
Preferably, the material of the mouth guard plate is rubber.
In the invention, in the process of excavating the working well and the receiving well, the side walls of the working well and the receiving well are subjected to guniting protection, so that the phenomenon that the side walls of the working well and the receiving well drop soil or gravels to cause danger to construction operators in the subsequent operation process can be effectively prevented, the used 100KW mute diesel generator can be conveniently used as a lighting power supply for construction operation and a power source for operation equipment, and the generated noise is small. Advance little pipe operation is carried out earlier before the operation of jacking, consolidates the protection to the pipeline position outside that needs the jacking, and the advance little pipe that adopts consolidates the operation and both can prevent that the extruded soil from bulging when the construction operation is advanced in the pipeline jacking, influences ground road bed or building, also can prevent the collapse of artifical excavation in-process sandy soil. The pipeline jacking process adopts manual excavation and equipment jacking operation mode, the resistance of soil inside the pipeline to the jacking process can be reduced by the operation mode, the requirement for jacking force is reduced, the soil inside the pipeline can be excavated, the soil outside the front end of the pipeline can be favorably used for entering the pipeline, the extrusion degree of the soil is reduced, and the disturbance to the surrounding soil is avoided. Still measure and rectify in the jacking process, adjust the pipeline jacking construction operation through measuring the pipeline both ends altitude difference, guarantee the precision of operation. The three hydraulic cylinders are used as jacking power sources, the mounting points of the three hydraulic cylinders are located at the vertex positions of the regular triangles, applied thrust is uniform, the opening protecting plate is arranged between the hydraulic cylinders and the pipeline and made of rubber materials and has certain elasticity, contact force between the hydraulic cylinders and the pipeline can be buffered, and the integrity of the end part of the pipeline is protected. The laser emitter arranged on the mouth guard plate can emit laser rays which can be conveniently used for detecting the elevation difference at two ends of a pipeline, and the measurement operation efficiency is improved.
Drawings
FIG. 1 is a flow chart of the construction method of the present invention;
FIG. 2 is a schematic cross-sectional view of the jacking operation of the present invention;
FIG. 3 is a schematic view of an advanced ductwork grouting arrangement of the present invention;
FIG. 4 is a schematic view of the jacking operation of the present invention;
in the figure: 1. a small advanced catheter; 2. a ingate; 3. a working well; 4. a receiving well; 5. a support plate; 6. a guide rail; 7. an inner piston ring; 8. a supporting seat; 9. a linear drive mechanism; 10. a mouth guard plate; 11. a laser emitter.
Detailed Description
The invention will be further explained with reference to the accompanying drawings:
as shown in fig. 1, fig. 2, fig. 3 and fig. 4, the low-noise vibration-reducing slot-opening-free construction method for the tunnel jacking pipe comprises the following steps:
the method comprises the following steps: the construction method comprises the steps of constructing a permanent level point on the ground, using the level point as a reference point of the whole construction, guiding the relative elevation of a pipeline to the level point through a vertical steel hanging ruler, transmitting and guiding the elevation of a ground elevation control point to the bottom of the pipeline through two levels, and determining the control elevation of the pipeline. A100 KW mute diesel generator set is prepared to serve as a power source for construction operation and a power source for illuminating lamps, and a plurality of illuminating lamps are prepared, so that night operation or pipeline internal operation of construction is facilitated.
Step two: construction operation of the working well 3 and the receiving well 4 is carried out, according to a preset operation position, the working well 3 and the receiving well 4 are excavated through a human body, an engineering machine (an excavator) can also be used for excavating the working well 3 and the receiving well 4 in a preferred embodiment, cement mortar is sprayed on the surface of the excavated working well 3 and the surface of the excavated receiving well 4 for reinforcement and protection, protective nets are installed at the outer edges of the working well 3 and the receiving well 4, the height of each protective net is 1 m-3 m in one embodiment, the height of each protective net is 2m in one specific embodiment, each protective net is of an annular closed structure, drainage ditches are arranged on the outer sides of the protective nets and used for draining underground water in the excavation process of the working well 3 and the receiving well 4, after the working well 3 and the receiving well 4 are excavated to the arch crown elevation of the ingate 2, openings of the ingate 2 are reserved, annular closed treatment is carried out at the openings of the ingate 2, specifically, when the ingate 2 is subjected to annular sealing treatment, four vertical connecting reinforcing steel bars are required to be additionally arranged on two sides of the ingate respectively, the concrete spraying thickness is reduced to 10-15 cm, two densely-arranged arch ditch grids are required to be arranged on the ingate, the reinforcing steel bars are welded with the cut horizontal steel grids of the vertical shaft into a whole, and downward construction is continued until the completion of the sealing treatment.
Step three: the grouting operation of the advanced small guide pipe 1 comprises the steps of firstly manufacturing the advanced small guide pipe 1, cutting a steel pipe into the length of 2000-5000 mm, wherein in a specific embodiment, the outer diameter of the steel pipe is 40mm, the wall thickness is 4mm, the length of the steel pipe is 3500mm, one end of the steel pipe is made into a conical shape with the length of 300mm, a phi 6 steel bar hoop is welded at the position 100mm away from the other end, no hole is formed at the position 1000mm away from one end of the steel bar hoop, slurry overflow holes with the length of 6mm are distributed at intervals of 200mm quincunx shapes in the rest part, and a plurality of the advanced small guide pipes 1 are uniformly distributed along the circumferential direction outside a horse head door 2 holeThe arrangement is that in a specific embodiment, the circumferential distance is 300mm, the circumferential arch opening angle of the plurality of leading small guide pipes 1 is 120-180 degrees, in a preferred embodiment, the circumferential arch opening angle of the plurality of leading small guide pipes 1 is 150 degrees, in a more preferred embodiment, the arch opening angle of the leading small guide pipe 1 is not more than 150 degrees before the ingate construction, and when the leading small guide pipe 1 passes through the soil filling section, the arch opening angle of the leading small guide pipe 1 is not more than 180 degrees. In another embodiment, an existing advanced small catheter may be used, such as that disclosed in the patent application No. 201811501612.3. Preparing a grouting raw material, and mixing common portland cement and a retarder for use, wherein the weight ratio of water to cement is 1-1.5: 1, the mixing amount of the retarder is 1-3%, the using amount of the retarder is determined according to the gel time in a specific embodiment, in a preferred embodiment, the retarder is disodium hydrogen phosphate, and the strength grade of the portland cement is not lower than 32.5. Finally, the advanced ductus grouting operation is carried out, the pilot hole is drilled by using a YT-28 air drill, in one embodiment, the air drill of An impact hammer is used for jacking, or the sand is blown out by a blow pipe to form a hole with the approximate diameter of 50mm, the sand is inserted into the advanced ductus 1, the sand in the pipeline is fished and/or blown out, the peripheral seam of the ductus is sealed by plastic cement, the hole opening is blocked by cotton yarn, grouting is carried out by using a two-fluid grouting pump, and the estimation formula of grouting amount is carried out by Q = An alpha (1 + beta), wherein: q- -Total grouting amount, m3(ii) a A- -grouting range volume, m3(ii) a n-porosity,%; α -slurry fill factor (0.7-0.9) β -grouting material loss factor, in one embodiment, na (1 + β) is collectively referred to as the grouting fill factor, which is considered as 20%. The lapping length of each circulation grouting is 1000mm, in the process of the grouting of the advanced small guide pipe 1, the pressure gradually rises, the flow gradually falls, when the pressure reaches the grouting final pressure, the grouting amount reaches more than 80% of the standard grouting amount, the hole grouting can be finished, or the grouting amount does not reach the design final pressure, the grouting amount reaches the design grouting amount, the phenomenon of slurry leakage does not exist, and the hole grouting can also be finished.
Step four: the mounting of auxiliary operation equipment, use hoist and mount mechanical equipment vertical installation backup pad 5 on the back wall, the material of backup pad 5 is steel, and its size height is multiplied by width by thickness 2m multiplied by 2.5m multiplied by 80mm, backup pad 5 after the installation is perpendicular with 2 hole axis of ingate. And (3) mounting a track, wherein when the working well 3 and the receiving well 4 are sealed, the track is buried in the concrete, the height of the top surface of the track is about 10mm higher than the upper surface of the concrete, and the receiving well 4 in the first section of operation can also be used as the working well 3 in the next section of operation in the continuous operation process. The guide rails 6 are installed, two selected guide rails 6 are straight, parallel and equal in height, one ends of the guide rails 6 are fixedly installed on the side walls of the working well 3 and the receiving well 4, the longitudinal slope of the guide rails along the jacking direction of the pipeline is consistent with the design slope of the pipeline, and in a specific embodiment, the installation positions of the two guide rails 6 can be adjusted in angle by adopting laser equipment.
Step five: and (2) checking and processing the pipeline, checking the appearance of the pipeline, requiring no damage or longitudinal crack, enabling the end face to be smooth and vertical, avoiding use of unqualified pipeline, performing waxing (modified paraffin) treatment outside a pit according with the requirement, then hoisting the pipeline to a guide rail of a working well to be in place by using a crane, measuring the heights of the center and the front and rear ends of the pipeline after the pipeline is in place, taking the measuring reference as a leveling point in the step one, and performing jacking operation after the pipeline is installed to be qualified.
Step six: jacking and correcting the pipeline, manually digging soil at the front end in the pipeline, manually digging soil at one side, simultaneously jacking the pipeline by equipment, transporting the pipeline to a tail end working well 3 by a small crawler after digging out, hoisting the pipeline to the ground by a crane for storage, measuring the elevation of the pipe bottoms at two ends of the pipeline once when the pipeline is jacked in a jacking process, measuring the elevation of the pipe bottoms at two ends of the pipeline by using a leveling instrument in one embodiment, correcting the jacking angle when the elevation at two ends of the pipeline is out of tolerance, measuring the elevation of the pipe bottoms at two ends of the pipeline once when the pipeline is jacked in a jacking process of 100-200 mm, adopting an over-digging correction method or a top wood correction method when the elevation difference at two ends of the pipeline is between 10mm and 20mm, and adopting a top wood correction method when the elevation difference at two ends of the pipeline is greater than 20 mm; the method for correcting the deviation of the pipe by overexcitation is characterized in that the pipe is overexcited properly on the reverse side of deviation, the pipe is not overexcited or even a ridge is remained on the deviation side to form resistance, so that the pipe is deviated towards the overexcitation side with small resistance in jacking, and gradually returns to a designed position. In one embodiment, an inner piston ring 7 is arranged in the front three-section jacking pipeline, a wooden wedge is used for tightly holding the inner piston ring 7 and the inner wall of the pipeline, the material of the inner piston ring is steel, the width of the inner piston ring 7 is not less than 200mm, and in one embodiment, the width of the inner piston ring 7 is 160mm, and the thickness of the inner piston ring is 5 mm. In a preferred embodiment, thixotropic slurry is injected into a gap between the pipe wall and the soil wall during jacking to form a slurry sleeve, so that the frictional resistance between the pipe wall and the soil wall is reduced, in a specific embodiment, in order to ensure that the slurry does not flow outwards, the jacking inlet of the well wall is closed afterwards, and slurry rings with the thickness of 20 mm-30 mm are formed between the soil body and the pipe joints after grouting, so that the friction between the pipeline jacking and the soil can be reduced, and the connection strength of the periphery of the pipeline can be enhanced. During manual excavation operation, the pipeline needs to be ventilated, so that the safety of excavation operators is guaranteed.
The low-noise vibration-reducing and vibration-preventing open-slot construction device for implementing the jacking operation comprises a supporting seat 8, wherein the supporting seat 8 abuts against the surface of a supporting plate 5, one side of the supporting seat 8 is fixedly connected with one or more linear driving mechanisms 9 through fasteners, in a preferred embodiment, the linear driving mechanisms 9 are hydraulic cylinders, in a more preferred embodiment, the number of the hydraulic cylinders is three, the mounting points of the three hydraulic cylinders are basically positioned at three vertexes of a regular triangle, the three vertexes are positioned at the inner side of an inner hole of a pipeline, a mouth guard plate 10 is fixedly mounted at the extending end of the linear driving mechanisms 9, in one embodiment, the mouth guard plate 10 is made of rubber, the rubber has certain elasticity and can buffer the collision of two rigid device supports, a laser emitter 11 is mounted on the mouth guard plate 10, the light emitted by the laser emitter 11 is superposed with the axis of the pipeline, when the jacking operation is started, the light emitted by the laser emitter 11 is adjusted to be consistent with the jacking direction, the jacking pipeline axis can be measured by the light during jacking operation, and the jacking precision of the pipeline is more effectively guaranteed.
Step seven: and (3) sealing the jacking pipe after the jacking pipe is in place, sealing and cleaning the jacking pipe after the jacking pipe is in place, opening all pipe opening joints by adopting asbestos cement, cleaning the inside of the pipeline completely after opening, then grouting and filling the outer wall of the pipe, sealing a grouting opening after the space of the outer wall of the pipe is filled with plain cement slurry, and finally cleaning the newspaper and inspection handed over.
The above embodiments are only a few illustrations of the inventive concept and implementation, not limitations thereof, and the technical solutions without substantial changes are still within the scope of protection under the inventive concept.
Claims (10)
1. A low-noise vibration-reduction slot-opening-free construction method for a tunnel jacking pipe is characterized by comprising the following steps:
the method comprises the following steps: construction preparation;
step two: construction operation of a working well and a receiving well;
step three: leading the small guide pipe to perform grouting operation;
step four: auxiliary operation equipment installation;
step five: inspecting and processing pipelines;
step six: jacking and rectifying the deviation of the pipeline;
step seven: sealing the pipe after the pipe jacking is in place;
the specific implementation process of the first step is as follows: establishing a ground level point, guiding the relative elevation of the pipeline to a level base, transmitting and guiding the elevation of a ground elevation control point to the bottom of the pipeline through two level gauges, and determining a pipeline control elevation; preparing a 100KW silent diesel generator set as a power source for construction operation;
the specific implementation process of the second step is as follows: excavating a working well and a receiving well according to a preset operation position, spraying cement mortar on the surfaces of the excavated working well and the excavated receiving well for reinforcement and protection, installing protective nets at the outer edges of the working well and the receiving well, arranging drainage ditches outside the protective nets, reserving a ingate of the ingate after the excavation construction of the working well and the receiving well reaches the arch crown elevation of the ingate, performing annular sealing treatment at the reserved ingate of the ingate, and continuing downward construction after the sealing treatment;
the third step is implemented by the following specific steps: manufacturing small advanced catheters, cutting a steel pipe into the length of 2000-5000 mm, manufacturing one end of the steel pipe into a conical shape with the length of 300mm, welding a phi 6 steel bar hoop at a position 100mm away from the other end, not drilling holes 1000mm away from one end of the steel bar hoop, arranging phi 6 grout overflow holes in the rest part at intervals of 200mm quincunx, and uniformly distributing a plurality of small advanced catheters along the circumferential direction outside a horse head door opening; preparing grouting raw materials, namely mixing common portland cement and a retarder for use, wherein the weight ratio of water to cement is (1-1.5): 1, mixing amount of retarder is 1-3%; the advanced small duct grouting operation is carried out, YT-28 air drill is used for drilling a guide hole, or sand and stone are blown out by a blow pipe to form a hole with the approximate diameter of 50mm, the advanced small duct is inserted, the sand and stone in a pipeline are fished out and/or blown out, the periphery of the duct is plugged by plastic cement, an orifice is plugged by cotton yarn, grouting is started, the lap joint length of each circulation grouting is 1000mm, in the process of grouting the advanced small duct, the pressure gradually rises, the flow gradually falls, when the pressure reaches the grouting final pressure, the grouting amount reaches more than 80% of the standard grouting amount, the hole grouting can be finished, or the grouting pressure cannot reach the design final pressure, the grouting amount reaches the design grouting amount, no slurry leakage phenomenon exists, and the hole grouting can also be finished;
the specific implementation process of the step four is as follows: installing a support plate, vertically installing the support plate on the back seat wall, wherein the support plate is made of steel, and the size (height, width and thickness) of the support plate is approximately 2m multiplied by 2.5m multiplied by 80 mm; mounting a track, wherein when the bottom of the working well and the receiving well is sealed, the track is embedded in the concrete, and the height of the top surface of the track is about 10mm higher than the upper surface of the concrete; the guide rails are installed, the two guide rails are straight, parallel and equal in height, the guide rails are firmly installed, and the longitudinal slope of the guide rails is consistent with the design slope of the pipeline;
the concrete implementation process of the step five is as follows: checking the appearance of the pipeline, requiring no damage and longitudinal cracks, smoothly and vertically arranging the end faces, performing modified paraffin treatment outside the pit according with the requirements, and then hoisting the pit to a guide rail of a working well by using a crane to be in place; measuring the pipe bottom elevations of the center and the front and rear ends of the measuring pipeline after the pipe bottom elevations are in place, and performing jacking after the pipe bottom elevations are installed;
the specific implementation process of the step six is as follows: manually excavating soil at the front end inside the pipeline, manually excavating soil, simultaneously jacking the pipeline by equipment, transporting the pipeline to a tail end working well by a small climbing vehicle after excavating, hoisting the pipeline to the ground by a crane for storage, measuring the elevation of the pipe bottom at two ends of the pipeline once when the pipeline is jacked by 300-500 mmmm in the jacking process, correcting the jacking angle when the elevation of two ends of the pipeline is out of tolerance, measuring the elevation of the pipe bottom at two ends of the pipeline once when the pipeline is jacked by 100-200 mm in the correcting process, and continuously jacking the pipeline after correcting;
the specific implementation process of the seventh step is as follows: and sealing and cleaning the pipe after the jacking pipe is pushed in place, opening all pipe opening joints by adopting asbestos cement, cleaning the interior of the pipeline after opening is finished, grouting and filling the outer wall of the pipe, filling the space of the outer wall of the pipe with plain cement slurry, sealing the grouting opening after the space of the outer wall of the pipe is filled with the plain cement slurry, and finally cleaning the inspection and delivery work.
2. The low-noise vibration-reduction slot-opening-free construction method of the tunnel jacking pipe as claimed in claim 1, wherein: and in the second step, when the ingate of the ingate is subjected to annular sealing treatment, four vertical connecting reinforcing steel bars are required to be additionally arranged on two sides of the ingate respectively, the concrete spraying thickness is reduced to 10-15 cm, two densely arranged gully grids are required to be arranged at the ingate, and the additional reinforcing steel bars are welded with the cut horizontal steel grids of the vertical shaft into a whole.
3. The low-noise vibration-reduction slot-opening-free construction method of the tunnel jacking pipe as claimed in claim 1, wherein: in the third step, the outer diameter of the steel pipe is phi 40mm, the wall thickness is 4mm, the length of the steel pipe is 3500mm, the circumferential interval is 300mm, and the circumferential arch part opening angle of the plurality of the advanced small ducts is 120-180 degrees.
4. The low-noise vibration-reduction slot-opening-free construction method of the tunnel jacking pipe as claimed in claim 1, wherein: and the retarder in the third step is disodium hydrogen phosphate, and the strength grade of the portland cement is not lower than 32.5.
5. The low-noise vibration-reduction slot-opening-free construction method of the tunnel jacking pipe as claimed in claim 1, wherein: and arranging an inner piston ring in the front three sections of pipelines jacked in the sixth step, tightly arranging the inner piston ring and the inner walls of the pipelines by using wood wedges, wherein the inner piston ring is made of steel, and the width of the inner piston ring is not less than 200 mm.
6. The low-noise vibration-reduction slot-opening-free construction method of the tunnel jacking pipe as claimed in claim 1, wherein: the deviation correcting method in the sixth step is an over-excavation deviation correcting method or a top wood deviation correcting method, wherein the over-excavation deviation correcting method is adopted when the height difference of two ends of the pipeline is between 10mm and 20mm, and the top wood deviation correcting method is adopted when the height difference of two ends of the pipeline is more than 20 mm; the overexcavation deviation rectifying method is characterized by that it adopts proper overexcavation on the reverse side of deviation of pipeline, and does not use overexcavation or even leave ridge on the deviation side to form resistance force, so that the overexcavation side with small resistance force can be deviated in the course of pushing pipe, and can gradually return to the designed position.
7. The low-noise vibration-reducing slot-opening-free construction method according to claim 1, characterized in that: and sixthly, in the jacking process, thixotropic slurry is injected into a gap between the pipe wall and the soil wall to form a slurry sleeve, so that the frictional resistance between the pipe wall and the soil wall is reduced.
8. The utility model provides a tunnel push pipe's low noise vibration reduction exempts from to open slot type construction equipment, includes the supporting seat, its characterized in that, supporting seat one side is equipped with one or more straight line actuating mechanism, straight line actuating mechanism one end installation protects the oral plate be equipped with laser emitter on protecting the oral plate, the light that laser emitter jetted out and pipeline axis coincidence.
9. The low-noise vibration-reducing slotted-free construction device for the tunnel jacking pipe as claimed in claim 8, wherein: the linear driving mechanism is a hydraulic cylinder, the number of the hydraulic cylinders is three, and the three hydraulic cylinder mounting points are basically located at three vertexes of a regular triangle.
10. The low-noise vibration-reducing slotted-free construction device for the tunnel jacking pipe as claimed in claim 8, wherein: the mouth guard plate is made of rubber.
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