CN111609212A - Reverse jacking steel pipe sleeve trimming offset jacking pipe construction method - Google Patents
Reverse jacking steel pipe sleeve trimming offset jacking pipe construction method Download PDFInfo
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- CN111609212A CN111609212A CN202010475812.7A CN202010475812A CN111609212A CN 111609212 A CN111609212 A CN 111609212A CN 202010475812 A CN202010475812 A CN 202010475812A CN 111609212 A CN111609212 A CN 111609212A
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- pipe
- jacking
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- sleeve
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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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- 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
- F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
- F16L55/10—Means for stopping flow from or in pipes or hoses
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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
- F16L9/00—Rigid pipes
- F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
- F16L9/153—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and concrete with or without reinforcement
Abstract
The invention relates to a reverse jacking steel sleeve trimming offset jacking pipe construction method, which is characterized in that a constructor can clear away mud in a steel sleeve from one side of a receiving well, enter the steel sleeve to disassemble a machine head and disassemble an offset concrete pipe, so that the constructor is protected by the steel sleeve, and danger caused by collapse of a construction position is avoided when the machine head and the concrete pipe are disassembled. And (3) jacking a new concrete pipe from the receiving well to be in butt joint connection with the original concrete pipe and continuously burying the new concrete pipe to extend out of the receiving well according to the set axis precision, filling concrete between the steel sleeve and the concrete pipe, supporting the concrete pipe, and completing construction of the last section of jacking pipe close to the receiving well. The construction method adopts the pipe jacking system to finish the pipeline deviation rectification, avoids the damage of the traditional pipe jacking deviation rectification construction to the environment caused by adopting methods such as ground excavation and the like, saves the construction cost of earthwork excavation and field recovery, and has the advantages of simple construction operation, time-saving, high efficiency and safety in process.
Description
Technical Field
The invention relates to the technical field of pipe jacking construction, in particular to a reverse jacking steel pipe sleeve trimming offset pipe jacking construction method.
Background
The existing pipe jacking construction method is a non-excavation construction method, and pipeline burying can be carried out under the condition of few excavation or no excavation through the construction method. When the pipe jacking construction method works, the jacking force generated by the pipe jacking machine is used for overcoming the friction force between the pipeline and the surrounding soil so as to jack the pipeline into the soil layer according to the designed gradient and carry away earthwork. The tool pipe or the machine head is pushed into the receiving pit from the working pit through the soil layer and lifted, and the pipeline penetrates through the soil layer from the working well and enters the receiving well along with the operation of the pipe jacking machine. The pipeline is buried between the two pits after following the tool pipe or the machine head.
However, in various actual construction processes, extension errors are easily generated during jacking of the pipeline, such as collapse of soil below the pipeline, and the like, so that the jacking pipe construction is difficult to form according to the designed axis. Especially when the deviation of the jacking pipe reaches dozens of centimeters and the deviation position of the jacking pipe is close to the receiving well, the traditional construction method for correcting the deviation of the jacking pipe construction has the defects that large deviation correction cannot be finished due to the close distance and the limited deviation correcting angle, or the deviation correcting process is complicated, the construction cost is overhigh, secondary damage to the environment is caused, and the like, and is easy to be limited by site construction conditions. Therefore, there is room for improvement.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a construction method for reversely jacking a steel pipe sleeve to finish an offset jacking pipe, which has the effect of correcting the deviation of a tail end pipeline, is suitable for large-offset jacking pipe deviation correcting construction, is particularly suitable for deviation distance of less than 20m from a receiving well, or cannot be processed in the construction process due to small pipe diameter, and cannot adopt open cut and in-pipe hole opening methods to correct the jacking pipe deviation.
The above object of the present invention is achieved by the following technical solutions:
the construction method for reversely jacking the steel pipe sleeve to trim the offset jacking pipe comprises the following steps of:
the method comprises the following steps: installing jacking equipment in a receiving well and prefabricating a steel sleeve with the diameter larger than that of the concrete pipe;
step two: jacking a steel sleeve into a soil body by utilizing jacking equipment according to the original designed jacking pipe axis until a concrete pipe needing to be corrected is completely wrapped according to the initial jacking mode of the jacking pipe in the receiving well;
step three: clearing earthwork in the steel sleeve until the machine head is exposed;
step four: the connection between the interior of the machine head and the starting well is released, redundant soil in the rigid casing pipe is cleaned, and the machine head is moved out towards the receiving well and is hoisted to the ground;
step five: removing the concrete pipe with the axis not meeting the design requirement and moving out from one side of the receiving well;
step six: the concrete pipe is jacked from the receiving well and is in butt joint connection with the original concrete pipe;
step seven: and concrete is filled between the steel sleeve and the concrete pipe.
Through adopting above-mentioned technical scheme, through advancing steel casing pipe from the receiving well top that the construction was accomplished, in wrapping up into the steel casing pipe with the concrete pipe of terminal skew completely to constructor can follow receiving well one side and clear away the earth in the steel casing pipe and get into the steel casing pipe in to dismantle the aircraft nose, demolish the concrete pipe of skew, thereby protect constructor through the steel casing pipe, be difficult for taking place danger because of construction position collapse when demolising aircraft nose and concrete pipe. After the machine head and the inclined concrete pipe in the steel sleeve are disassembled, a new concrete pipe is pushed into the receiving well from the receiving well to be in butt joint with the original concrete pipe and is continuously buried until the new concrete pipe extends out of the receiving well according to the set axis precision, because the diameter of the steel sleeve is larger than that of the concrete pipe, concrete is filled between the steel sleeve and the concrete pipe to support the concrete pipe, and the construction of the last section of push pipe close to the receiving well is completed. The construction method adopts the pipe jacking system to finish the pipeline deviation rectification, utilizes the finished receiving well construction, avoids the damage of the traditional pipe jacking deviation rectification construction to the environment by adopting methods such as ground excavation and the like, saves the construction cost of earthwork excavation and field recovery, and has simple construction operation, time-saving, high efficiency and safety in the process.
The present invention in a preferred example may be further configured to: the steel sleeve comprises a plurality of steel pipe monomers which are connected with each other, the steel pipe monomers are sequentially jacked into the soil body in the second step, and any steel pipe monomer is welded with the next steel pipe monomer before being completely jacked into the soil body.
By adopting the technical scheme, the steel pipe sleeve is formed by welding a plurality of steel pipe monomers, the steel pipe sleeve is jacked into the soil body from the receiving well in sequence through the pipe jacking equipment, two ends of any steel pipe monomer are welded and connected with the adjacent steel pipe monomers, in the welding process, after any steel pipe monomer is locally inserted into the soil body and fixed, the next steel pipe monomer is welded and fixed with the steel pipe monomer, and then jacking work is continued.
The present invention in a preferred example may be further configured to: the following construction steps are added between the fifth step and the sixth step: and pouring a concrete cushion layer at the bottom of the steel sleeve, and leveling the height difference between the concrete cushion layer at the bottom in the steel sleeve and the soil between the lower bottoms of the concrete pipe joints according to the gradient.
By adopting the technical scheme, the concrete cushion is poured at the bottom of the steel sleeve before the new concrete pipe is installed, the diameter difference between the concrete pipe and the steel sleeve is made up, the concrete cushion can be leveled by utilizing equipment such as a total station and the like, and the newly installed concrete pipe is supported by the concrete cushion.
The present invention in a preferred example may be further configured to: and a step eight is added after the step seven: and (3) plugging the end of the steel sleeve and the concrete cushion layer in the receiving well by using a concrete brick, and tightly plugging the gap between the steel sleeve and the concrete pipe.
Through adopting above-mentioned technical scheme, be close to the one end of receiving the well with concrete brick shutoff concrete bed course and steel pipe sleeve, pack the clearance between steel-pipe column and the concrete pipe to the realization makes the connection between steel casing pipe and the concrete pipe more stable to location and the support of concrete pipe, and also be favorable to the later stage to carry out the shutoff to the thick liquid when grout between steel casing pipe and the concrete pipe.
The present invention in a preferred example may be further configured to: the concrete pipe is communicated with the inner circumferential surface and the outer circumferential surface and is provided with a plurality of grouting holes, and a ninth step is added after the eighth step: and filling cement slurry from the grouting holes to tightly fill the gaps between the pipelines.
By adopting the technical scheme, when a new concrete pipe is installed, the circumferential surface of the concrete pipe is penetrated in advance to be provided with the plurality of grouting holes, and then after the new concrete pipe and the old concrete pipe are installed, grouting is performed between the steel sleeve and the concrete pipe, so that the connectivity between the steel sleeve and the concrete pipe is improved.
The present invention in a preferred example may be further configured to: and in the ninth step, grouting is performed for at least three times, and the grouting height of each time does not exceed one third of the filling height.
Through adopting above-mentioned technical scheme, divide at least cubic slip casting between steel casing pipe and concrete pipe, can avoid the concrete pipe come-up, make the gravity of concrete pipe be greater than the buoyancy that the thick liquids produced all the time, and can carry out the slip casting next time behind the slip casting initial set each time.
The present invention in a preferred example may be further configured to: the inner peripheral surface of the steel pipe monomer is connected with a supporting block in a sliding mode around the axis of the steel pipe monomer, the cross section of the supporting block in the sliding direction is gradually increased from one end to the other end, and the sliding stroke of the supporting block extends to the lower end of the inner peripheral surface of the steel pipe monomer.
By adopting the technical scheme, the inner circumferential surface of the steel pipe monomer is connected with the supporting blocks with the variable cross sections in a sliding manner, and the supporting blocks can slide around the axis of the steel pipe monomer in an arc manner and the movement stroke can extend to the lower end of the inner circumferential surface of the steel pipe monomer. Therefore, when the deflection degree of some old concrete pipes is not large, the supporting blocks can be gradually jacked up by sliding the supporting blocks to the lower part of the old concrete pipes, the deviation rectification of the axes of the old concrete pipes is realized, the time cost for disassembling the old concrete pipes can be reduced, or the material cost for crushing the old concrete pipes is reduced, and the effect of environmental protection is achieved. The support blocks can contact the connection between the inclined concrete pipe and the adjacent concrete pipe according to the situation in the sliding process of the support blocks, and the concrete pipes are fixed again after being corrected. Or the concrete pipe can be corrected by the jack or the chain block, and then the supporting block is slid to the lower part of the concrete pipe and is fixed, so that the supporting block can continuously support the concrete pipe.
The present invention in a preferred example may be further configured to: and the first group of steel pipe monomers are subjected to tip milling treatment at one end far away from the receiving well.
By adopting the technical scheme, the side wall of the jacking end of the first group of steel pipe monomers is subjected to milling sharp treatment, so that the pressure on a soil layer is increased when the steel sleeve jacks, and the steel sleeve jacks more labor-saving.
The present invention in a preferred example may be further configured to: and a lubricating layer is coated on the outer peripheral surface of the steel pipe monomer.
By adopting the technical scheme, the lubricating layer can adopt the wax layer, and the setting of the lubricating layer is favorable for reducing the friction force when the steel sleeve jacks into the coating, so that the jacking process is not easy to deflect.
In conclusion, the invention has the following beneficial effects:
1. the pipe deviation rectification is completed by adopting a pipe jacking system through the arrangement of the construction method, the damage to the environment caused by the deviation rectification by adopting methods such as ground excavation and the like in the traditional pipe jacking deviation rectification construction is avoided by utilizing the completed receiving well construction, the construction cost of earthwork excavation and field recovery is saved, the construction operation is simple, and the process is time-saving, efficient and safe;
2. the steel pipe single body is sleeved with the concrete pipe in place, the supporting block is slid to the lower part of the old concrete pipe, the concrete pipe is gradually contacted with the part with the cross section area from small to large of the supporting block and is gradually raised, and the axis of the concrete pipe is reset, so that the construction cost and the material cost for damaging the old concrete pipe or removing the old concrete pipe are reduced;
3. the new concrete pipe is supported by laying the concrete cushion layer in the steel sleeve, one ends of the steel sleeve and the concrete pipe, which are close to the receiving well, are plugged through concrete bricks, and then grouting is performed between the steel sleeve and the concrete pipe, so that the concrete pipe and the steel sleeve are closely connected, and the integral strength and the anti-damage capability of the concrete pipe are favorably improved.
Drawings
FIG. 1 is a sectional view of a construction structure after a steel bushing is pushed in according to an embodiment;
FIG. 2 is a cross-sectional view of the structure after completion of the deviation rectification in the first embodiment;
FIG. 3 is a sectional view of the construction structure after the steel bushing is pushed in the second embodiment;
FIG. 4 is a cross-sectional view of the structure after completion of deviation rectification in the second embodiment;
FIG. 5 is a schematic structural view of a steel pipe unit according to the second embodiment.
Reference numerals: 1. a receiving well; 11. steel casing; 12. a steel pipe monomer; 121. a support block; 122. a chute; 13. jacking equipment; 2. a working well; 21. a concrete pipe; 211. grouting holes; 22. a machine head; 3. a concrete pad.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
The first embodiment is as follows:
as shown in fig. 1 to 2, the construction method for trimming the offset jacking pipe by reversely jacking the steel pipe sleeve disclosed by the invention comprises the following steps:
the method comprises the following steps: installing jacking equipment 13 in the receiving well 1 and prefabricating a steel sleeve 11 with the diameter larger than that of a concrete pipe 21;
step two: according to a conventional pipe jacking initial jacking mode in the receiving well 1, jacking equipment 13 is utilized to jack the steel sleeve 11 into the soil body according to the original designed pipe jacking axis until the concrete pipe 21 needing to be corrected is completely wrapped, and a total station can be utilized to determine that the jacking axis of the steel sleeve 11 is overlapped or deviated from the jacking axis of the original concrete pipe 21;
step three: clearing earthwork in the steel sleeve 11 until the nose 22 is exposed;
step four: the connection between the interior of the machine head 22 and the starting well is released, the redundant soil in the rigid casing pipe is cleaned, and the machine head 22 is moved out towards the receiving well 1 and is hoisted to the ground;
step five: the concrete pipe 21 with the axis not meeting the design requirement is dismantled and removed from one side of the receiving well 1; then, a concrete cushion 3 is poured at the bottom of the steel sleeve 11, and the height difference between the concrete cushion 3 at the bottom in the steel sleeve 11 and the soil at the lower bottom of the concrete pipe 21 section is leveled according to the gradient;
step six: jacking a new concrete pipe 21 from the receiving well 1 to be in butt joint with the original concrete pipe 21, wherein the new concrete pipe 21 penetrates through the inner and outer circumferential surfaces and is provided with a plurality of grouting holes 211, and the grouting holes 211 are arranged at equal angles along the axis of the concrete pipe 21;
step seven: concrete is filled between the steel sleeve 11 and the concrete pipe 21;
step eight: the steel sleeve 11 and the end of the concrete cushion 3 in the receiving well 1 are sealed and blocked by concrete bricks, and a gap between the sleeve and the concrete pipe 21 is tightly sealed and blocked;
step nine: the gaps between the pipelines are tightly filled by pouring cement grout from the grouting holes 211, the grouting process is divided into at least three times of grouting, the grouting height does not exceed one third of the filling height each time, the concrete pipe 21 is corrected after the cement grout is solidified, and the follow-up work of pipe-jacking construction can be continued.
The steel sleeve 11 comprises a plurality of steel pipe single bodies 12 which are connected with each other, and a lubricating layer is coated on the outer peripheral surfaces of the steel pipe single bodies 12 to reduce the friction force of the steel pipe single bodies which are jacked into the soil body. In the second step, the steel pipe single bodies 12 are sequentially jacked into the soil body from the receiving well 1 through pipe jacking equipment, two ends of any steel pipe single body 12 are welded and connected with the adjacent steel pipe single bodies 12, in the welding process, after any steel pipe single body 12 is locally inserted into the soil body and fixed, the next steel pipe single body 12 is welded and fixed with the steel pipe single body 12, and then jacking work is continued.
The milling tip treatment is carried out on one end, far away from the receiving well 1, of the first group of jacked steel pipe monomers 12, so that the pressure intensity of the steel sleeve 11 during jacking into a soil body is increased, and the condition of central axis deviation in the jacking process of the steel sleeve 11 is favorably reduced.
The construction method adopts the pipe jacking system to finish pipeline deviation rectification, utilizes the finished receiving well 1 for construction, avoids the damage of the traditional pipe jacking deviation rectification construction to the environment caused by the deviation rectification by adopting methods such as ground excavation and the like, saves the construction cost of earthwork excavation and field recovery, and has simple construction operation, time-saving process, high efficiency and safety.
Example two:
the difference between this embodiment and the first embodiment is: the inner circumferential surface of the steel pipe single body 12 is connected with a plurality of supporting blocks 121 in an arc manner around the axis of the steel pipe single body 12, the supporting blocks 121 on any steel pipe single body 12 are arranged at equal intervals along the axis direction of the steel pipe single body 12, and the interval between the adjacent supporting blocks 121 is smaller than the length of the concrete pipe 21. The inner peripheral surface of the steel pipe single body 12 is provided with an arc chute 122 along the axis of the steel pipe single body 12, the chute 122 is a T-shaped groove, a T-shaped block is fixed on the arc surface of the support block 121 facing the steel pipe single body 12, and the T-shaped block slides in the T-shaped groove in a clamping manner, so that the support block 121 and the steel pipe single body 12 are connected in a sliding manner.
The cross section of supporting shoe 121 along the slip direction is crescent from one end to the other end, the slip stroke of supporting shoe 121 extends to the inner peripheral surface lower extreme of steel pipe monomer 12, both ends through setting up spout 122 extend to concrete pipe 21 lower extreme and top respectively, realize that supporting shoe 121 can slide to the below of concrete pipe 21, wherein the less one end of cross section of supporting shoe 121 contracts in spout 122, the less one end of cross section of supporting shoe 121 contacts with concrete pipe 21 earlier, then jack-up concrete pipe 21 gradually in the in-process of slip supporting shoe 121, adjacent two sets of supporting shoes 121 realize jointly rectifying a deviation and supporting to the concrete pipe 21 of axis slope.
The implementation principle of the embodiment is as follows:
in the process of using the supporting block 121 to correct the deviation of the concrete pipe 21, whether the old concrete pipe 21 at the tail end is still complete and whether the deviation correction rescue can be carried out is checked through site survey of construction workers, and then the old concrete pipe 21 which cannot be corrected is dismantled. Cleaning soil between the old concrete pipe 21 capable of performing deviation rectification and the steel sleeve 11, sliding the supporting block 121 to the position below the old concrete pipe 21, gradually adjusting the sliding distance to adjust the axis of the old concrete pipe 21 to a preset state, then welding and fixing the supporting block 121 and the steel sleeve 11, and finally completing all construction through the fifth step to the ninth step in the first embodiment.
The old concrete pipe 21 can be temporarily supported and corrected by a jack and the like, and then the supporting block 121 is slid to the lower part of the old concrete pipe 21, and then the temporarily supported jack is taken out after the position of the supporting block 121 is fixed, so that correction and repair are completed.
The embodiments of the present invention are preferred embodiments of the present invention, and the scope of the present invention is not limited by these embodiments, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.
Claims (9)
1. The construction method for reversely jacking the steel pipe sleeve to trim the offset jacking pipe is characterized by comprising the following steps of: the method comprises the following steps:
the method comprises the following steps: installing jacking equipment 13 in the receiving well 1 and prefabricating a steel sleeve 11 with the diameter larger than that of a concrete pipe 21;
step two: jacking a steel sleeve 11 into a soil body by using jacking equipment 13 according to the original designed jacking pipe axis in the receiving well 1 according to the initial jacking mode of the jacking pipe until a concrete pipe 21 needing to be corrected for deviation is completely wrapped;
step three: clearing earthwork in the steel sleeve 11 until the nose 22 is exposed;
step four: the connection between the interior of the machine head 22 and the starting well is released, the redundant soil in the rigid casing pipe is cleaned, and the machine head 22 is moved out towards the receiving well 1 and is hoisted to the ground;
step five: the concrete pipe 21 with the axis not meeting the design requirement is dismantled and removed from one side of the receiving well 1;
step six: jacking the concrete pipe 21 from the receiving well 1 to be in butt joint connection with the original concrete pipe 21;
step seven: concrete is filled between the steel casing 11 and the concrete pipe 21.
2. The method for constructing a reverse jacking steel pipe sleeve to trim an offset jacking pipe as claimed in claim 1, wherein the method comprises the following steps: the steel sleeve 11 comprises a plurality of steel pipe monomers 12 which are connected with each other, in the second step, the steel pipe monomers 12 are sequentially jacked into the soil body, and any steel pipe monomer 12 is welded with the next steel pipe monomer 12 before being completely jacked into the soil body.
3. The method for constructing a reverse jacking steel pipe sleeve to trim an offset jacking pipe as claimed in claim 1, wherein the method comprises the following steps: the following construction steps are added between the fifth step and the sixth step: and (3) pouring a concrete cushion 3 at the bottom of the steel sleeve 11, and leveling the height difference between the concrete cushion 3 at the bottom in the steel sleeve 11 and the soil at the lower bottom of the concrete pipe 21 section according to the gradient.
4. The method for constructing a reverse jacking steel pipe sleeve to trim an offset jacking pipe as claimed in claim 1, wherein the method comprises the following steps: and a step eight is added after the step seven: the steel sleeve 11 and the end of the concrete cushion 3 in the receiving well 1 are sealed and blocked by concrete bricks, and the gap between the steel sleeve and the concrete pipe 21 is tightly sealed and blocked.
5. The method for constructing a reverse jacking steel pipe sleeve to trim an offset jacking pipe as claimed in claim 4, wherein the method comprises the following steps: the concrete pipe 21 is provided with a plurality of grouting holes 211 penetrating through the inner and outer circumferential surfaces, and step nine is added after step eight: and the gaps between the pipelines are filled and compacted by pouring cement slurry from the grouting holes 211.
6. The method for constructing a reverse jacking steel pipe sleeve to trim an offset jacking pipe as claimed in claim 5, wherein: and in the ninth step, grouting is performed for at least three times, and the grouting height of each time does not exceed one third of the filling height.
7. The method for constructing a reverse jacking steel pipe sleeve to trim an offset jacking pipe as claimed in claim 2, wherein: the inner circumferential surface of the steel pipe single body 12 is connected with a supporting block 121 around the axis of the steel pipe single body 12 in a sliding manner, the cross section of the supporting block 121 along the sliding direction is gradually increased from one end to the other end, and the sliding stroke of the supporting block 121 extends to the lower end of the inner circumferential surface of the steel pipe single body 12.
8. The method for constructing a reverse jacking steel pipe sleeve to trim an offset jacking pipe as claimed in claim 2, wherein: the end of the first group of steel pipe single bodies 12 far away from the receiving well 1 is subjected to tip milling treatment.
9. The method for constructing a reverse jacking steel pipe sleeve to trim an offset jacking pipe as claimed in claim 2, wherein: and a lubricating layer is coated on the outer peripheral surface of the steel pipe single body 12.
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| CN202010475812.7A CN111609212B (en) | 2020-05-29 | 2020-05-29 | Reverse jacking steel pipe sleeve trimming offset jacking pipe construction method |
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Cited By (6)
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| CN112377203A (en) * | 2020-11-10 | 2021-02-19 | 常熟市市政建设有限责任公司 | Construction method for repairing large-deviation jacking pipe by reversely jacking steel sleeve |
| CN112709313A (en) * | 2020-12-31 | 2021-04-27 | 苏州凯达市政景观建设有限公司 | Municipal sewage pipeline trenchless construction equipment and method |
| CN113236855A (en) * | 2021-04-20 | 2021-08-10 | 武汉一冶建筑安装工程有限责任公司 | Method for taking out pipe jacking machine head when jacking cannot be carried out |
| CN114294474A (en) * | 2022-03-03 | 2022-04-08 | 山西太水市政工程有限公司 | Jacking pipe system with positioning function and construction method thereof |
| CN114636017A (en) * | 2022-03-01 | 2022-06-17 | 武汉市武昌市政建设(集团)有限公司 | Pipe jacking construction process suitable for expansive soil layer |
| CN115218034A (en) * | 2022-05-30 | 2022-10-21 | 中建三局安装工程有限公司 | Method for installing ejection pipe penetrating in concrete sleeve |
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| CN114636017B (en) * | 2022-03-01 | 2023-12-08 | 武汉市武昌市政建设(集团)有限公司 | Pipe jacking construction process suitable for expansive soil layer |
| CN114294474A (en) * | 2022-03-03 | 2022-04-08 | 山西太水市政工程有限公司 | Jacking pipe system with positioning function and construction method thereof |
| CN115218034A (en) * | 2022-05-30 | 2022-10-21 | 中建三局安装工程有限公司 | Method for installing ejection pipe penetrating in concrete sleeve |
| CN115218034B (en) * | 2022-05-30 | 2024-02-09 | 中建三局安装工程有限公司 | Method for installing elastic shooting through pipe in concrete sleeve |
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