CN108222221B - Maintenance process for municipal sewage pipe - Google Patents
Maintenance process for municipal sewage pipe Download PDFInfo
- Publication number
- CN108222221B CN108222221B CN201810103751.4A CN201810103751A CN108222221B CN 108222221 B CN108222221 B CN 108222221B CN 201810103751 A CN201810103751 A CN 201810103751A CN 108222221 B CN108222221 B CN 108222221B
- Authority
- CN
- China
- Prior art keywords
- pipeline
- central shaft
- mud
- rod
- back expansion
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/06—Methods of, or installations for, laying sewer pipes
-
- E—FIXED CONSTRUCTIONS
- E03—WATER SUPPLY; SEWERAGE
- E03F—SEWERS; CESSPOOLS
- E03F3/00—Sewer pipe-line systems
- E03F3/06—Methods of, or installations for, laying sewer pipes
- E03F2003/065—Refurbishing of sewer pipes, e.g. by coating, lining
Landscapes
- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Public Health (AREA)
- Water Supply & Treatment (AREA)
- Earth Drilling (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses a maintenance process for a municipal sewage pipe, which relates to the technical field of urban building engineering construction, and particularly adopts equipment to crush or cut an original pipeline from the inside, extrude fragments of the original pipeline into a surrounding soil body, form pipe holes at the same time, and pull in a pipeline of a new pipeline synchronously to finish maintenance and updating. The whole longer pipeline can be repaired at one time no matter how many positions of the pipeline are, so that the repairing efficiency is improved. And when in maintenance, the use function of the connected pipeline is not influenced. The construction period is short, the working surface is small, and the interference to the ground is less. Compared with the whole excavation and repair, the cost can be saved, and higher economic benefits are achieved.
Description
Technical Field
The invention relates to the technical field of urban building engineering construction, in particular to a maintenance process for a municipal sewage pipe.
Background
Municipal pipeline engineering is an important component of municipal engineering and is an important infrastructure of cities. The municipal sewage pipe is mainly used for collecting and discharging domestic sewage and industrial sewage.
At present, municipal sewage pipes are generally paved by adopting a segmented continuous construction mode, and each segment adopts the following construction process:
s1, digging a groove to form a base groove;
s2, installing a foundation trench supporting structure, generally adopting a steel plate box for supporting, and aiming at: on one hand, the safety of the foundation trench is ensured, and on the other hand, the safety of subsequent pit operation of constructors is improved;
s3, pouring pipe bottom concrete to the bottom of the foundation trench, arranging polyethylene expansion joint plates every 6 meters, fixing the polyethylene expansion joint plates through a special structure, and manually leveling the poured pipe bottom concrete;
s4, after the pipe bottom concrete to be poured is initially solidified, the time of the initial solidification is usually 4-8 hours, one or more pipes are placed on the solidified pipe bottom concrete through hoisting equipment, and the pipes are fixed on the pipe bottom concrete through iron wires, so that the pipes can be prevented from floating upwards during the subsequent concrete pouring;
s5, adjusting the straightness of the pipe, wherein wedge-shaped concrete blocks or larger stones can be adopted;
s6, pouring pipe body and pipe top concrete to enable the upper, lower, left, right and periphery of the pipe to be surrounded by the concrete;
and S7, backfilling the groove, and completing construction of a section of sewage pipeline.
After long-time use, the condition of damaged seepage can appear in the pipeline, needs in time to maintain. At present, the pipeline first-aid repair technology mainly comprises CIPP (cleaning in place) overturning lining, ultraviolet curing, resin point position repairing and other process technologies. However, when the pipeline has the problems of many defect points, long length, high defect level, continuity of the defective pipeline and the like, the repairing efficiency is low and the cost is high by using the method. Therefore, a new maintenance process is urgently needed.
Disclosure of Invention
Aiming at the defects in the prior art, the invention aims to provide a maintenance process for a municipal sewage pipe, which has higher repair efficiency for pipelines with multiple defects, higher defect levels and longer lengths.
In order to achieve the purpose, the invention provides the following technical scheme:
a maintenance process for a municipal sewage pipe comprises the following steps,
s1, safety containment of the construction area range;
s2, plugging sewage wells at the upstream and the downstream of the pipeline to be maintained;
s3, deep well precipitation: excavating deep wells at two sides of each sewage well respectively to reduce water, and recovering the road surface after construction;
s4, temporary drainage: a sewage pump is used for draining the pipeline to be maintained;
s6, excavating an earth entering and exiting pit; digging an in-soil working pit and an out-soil working pit at two ends of a pipeline to be maintained;
s7, pre-punching: the diameter of a hole which enters any sewage well at the middle section of the pipeline to be maintained and is drilled manually is phi 550mm, and the center of the drilled hole is lifted by 100mm compared with the center of the sewage pipeline;
s8, drilling a guide hole: after the equipment is in place, the guided drilling is started from the working pit into the earth, and the guide track passes through the original deformed pipeline through the gradual adjustment of the downward drilling slope guidance;
s9, crushing the original pipe: after the drill is drilled, a back-expanding device with a knife edge is installed, and back expansion is carried out along a guide track, so that the original deformed pipeline is squeezed, expanded and crushed; step S8 is carried out again, then the back-expanding device with larger radius is replaced, back expansion is carried out again, and the steps are repeated until the channel is expanded to be 1.4-1.6 times of the outer diameter of the pipeline to be installed;
s10, back-expanding back-dragging: connecting the penetrated pipeline for pipe drawing after the back expansion head transfer case used in the last back expansion, welding and drawing the pipe according to the pipeline installation requirement, detaching the back expansion head and the transfer case after the pipeline is drawn to a preset position, and taking out the rest drill rods;
s12, cutting a well chamber pipeline, cutting the pipeline in the well along the wall of the well after the pipe is pulled in place, filling gaps between the opening and the pipeline with through sintered bricks, and pouring cement mortar;
s13, grouting and reinforcing surrounding soil;
and S14, cleaning and removing the yard on site.
By adopting the technical scheme, the method has the advantages that,
the original pipeline is broken or cut by adopting equipment from the inside, the fragments of the original pipeline are extruded into the surrounding soil body, pipe holes are formed at the same time, and the pipeline of the new pipeline is synchronously pulled in to finish maintenance and updating. The whole longer pipeline can be repaired at one time no matter how many positions of the pipeline are, so that the repairing efficiency is improved. And when in maintenance, the use function of the connected pipeline is not influenced. The construction period is short, the working surface is small, and the interference to the ground is less. Compared with the whole excavation and repair, the cost can be saved, and higher economic benefits are achieved.
The pre-drilling is beneficial to smooth transition of curves in the processes of drilling a guide hole, expanding a hole and dragging a pipeline back. The grouting reinforcement of the surrounding soil body can reduce the disturbance to the soil layer and the water and soil loss caused by pipeline damage in the construction process.
The invention is further provided with: using the mud, injecting the mud into the borehole via a mud mixing system, an onboard mud pump, a pilot bit, and a back reamer in steps S8, S9, and S10; and the liquid level in the slurry pit in the working pit is always kept higher than the elevation of the drilled hole in the back expansion process.
By adopting the technical scheme, the mud has the functions of cooling the drill bit, protecting the internal sensor and lubricating the drilling tool, and more importantly, the mud can suspend and carry drill cuttings, so that the mixed drill cuttings become a smooth discharge hole of flowing mud, not only can a sufficient annular space be provided for a back-dragging pipeline, but also the weight and the resistance of the back-dragging pipeline can be realized, and the mud remained in the hole can play a role of protecting the wall.
The invention is further provided with: the slurry used in step S8 includes, by weight, 7 to 8% of pre-hydrated sodium bentonite, 0.2 to 0.4% of a tackifier, and 0.3% of a fluid loss additive.
By adopting the technical scheme, mud proportioning is carried out outside the hole by mud, and the stability of the hole wall is maintained.
The invention is further provided with: the slurry used in step S9 includes, by weight, 7 to 8% of a pre-hydrated sodium bentonite, 0.3 to 0.5% of a viscosity-enhancing agent, and 0.4% of a fluid loss additive.
By adopting the technical scheme, the slurry proportion is the same as that in the above, the prepared slurry has good fluidity and suspension property, and the back-expansion hole forming effect is ideal. The slurry has good wall protection effect, prevents stratum collapse and improves the carrying capacity of the slurry.
The invention is further provided with: when the mud is re-expanded in the step S9, the Markov viscosity value of the mud is between 45 and 55 seconds, the specific gravity of the mud is greater than 1.03, and the specific gravity of the mud generated after the mud is injected into the soil and mixed with the clay is greater than 1.10.
By adopting the technical scheme, the mud proportion is increased in the construction, the mud viscosity can be increased, and the stability of the drilled hole is maintained by gold. The high bentonite is selected, so that the high slurry making rate of the slurry can be increased, and the excellent suspension capacity of the slurry is ensured; high molecular polymer is added into the slurry in proportion, so that a protective layer is formed on the wall of a drilled hole, a good wall protection function is achieved, and hole collapse is prevented.
The invention is further provided with: in step S9, a third back reaming is performed, where the diameter of the back reamer is smaller than the inner diameter of the original pipeline during the first reaming, the diameter of the back reamer is larger than the inner diameter of the original pipeline during the second reaming and the third reaming, and the lower base points coincide with each other during the third reaming.
By adopting the technical scheme, the back expansion is carried out for times, the corresponding extrusion expansion type drill bit is adopted for construction in the last back expansion, and if the back dragging force and the back expansion torque are large, the extrusion expansion type drill bit is used for carrying out back expansion for one more time, so that the hole wall forming and stabilizing are facilitated.
The invention is further provided with: the return expander comprises a central shaft for connecting the drill rod, a connecting rod which is connected with the return expanding rod of the central shaft in a rotating manner and connected with the return expanding rod in a rotating manner, the return expanding rod and the connecting rod are all provided with a plurality of roots along the circumferential direction of the central shaft, a plurality of return expanding thorns are arranged on the outer side of the return expanding rod, one end of the connecting rod is far away from the return expanding rod and is connected with the central shaft in a rotating manner, and the connecting rod is connected with the connecting rod in an axially sliding manner along the central shaft, and a.
Through adopting above-mentioned technical scheme, rotate through driving piece drive connecting rod to the drive returns the spreader bar and rotates, changes the perpendicular distance between spreader bar one end and the central axis, and then adjusts back and expand the diameter. The back expander does not need to be replaced frequently all the time. In step S9, after the back-reaming, the diameter of the back-reaming device can be reduced, and the back-reaming device is introduced into the tubular hole formed by the first back-reaming again, and when the diameter reaches one end, the diameter of the back-reaming device is adjusted to the diameter, thereby improving the working efficiency and reducing the cost.
The invention is further provided with: the support rod is arranged between the back expansion rod and the central shaft and is arranged in a telescopic mode, and two ends of the support rod are respectively connected to the central shaft and the back expansion rod in a rotating mode.
By adopting the technical scheme, the support rod has a supporting force for the back expansion rod, so that the possibility that the back expansion rod is deformed or even broken due to torsion in the back expansion process is reduced, and the service life of the back expansion device is prolonged.
The invention is further provided with: the central shaft is arranged in a hollow mode, a guniting pipe is arranged on the central shaft along the radial direction of the central shaft, and the guniting pipe is communicated with the central shaft.
Through adopting above-mentioned technical scheme, accessible shotcrete pipe with the better spouting of mud back expand the ware on, cool back expand the ware, carry the drill chip and arrange the earth's surface, stabilize the pore wall and reduce required moment of torsion and back the drag force when expanding back. And simultaneously, the surface of the pipe laying is protected when the pipe laying machine is pulled back.
The invention is further provided with: the slurry used in step S10 includes, by weight, 7 to 8% of a pre-hydrated sodium bentonite, 0.3 to 0.5% of a viscosity-enhancing agent, 0.4% of a fluid loss additive, and 2% to 3% of a lubricant.
By adopting the technical scheme, the mud has very high wall protection and sand carrying capacity and very good lubricating capacity and reduces friction resistance and torque when the mud is proportioned in the same way.
The invention has the following advantages: 1. the whole longer pipeline can be repaired at one time, no matter how many positions of the pipeline are, so that the repairing efficiency is improved; 2. when in maintenance, the use function of the connected pipeline is not influenced; 3. the construction period is short, the working surface is small, and the interference to the ground is less; 4. compared with the whole excavation and repair, the cost can be saved, and higher economic benefits are achieved.
Drawings
Fig. 1 is a schematic structural diagram of the first embodiment.
Reference numerals: 1. a central shaft; 2. a back expansion rod; 3. a connecting rod; 4. a guide rail; 5. a chute; 6. a first rotating shaft; 7. a drive member; 8. a connecting seat; 9. a second rotating shaft; 10. a compensation groove; 11. a support bar; 12. a first lever; 13. a second lever; 14. back expanding the thorns; 15. and (4) a guniting pipe.
Detailed Description
The invention is further described with reference to the accompanying drawings.
The first embodiment is as follows:
as shown in fig. 1, the back reamer comprises a central shaft 1 for connecting drill rods, a back reamer 2 connected to the central shaft 1 and a connecting rod 3. The back expanding rods 2 and the connecting rods 3 are both provided with a plurality of rods along the circumferential direction of the central shaft 1, and one back expanding rod 2 corresponds to one connecting rod 3.
As shown in fig. 1, one end of the back expansion rod 2 is rotatably connected to the connecting rod 3 and the other end is rotatably connected to one end of the connecting rod 3. The central shaft 1 is provided with a guide rail 4 along the axial direction thereof, and one end of the connecting rod 3 far away from the back expansion rod 2 is embedded in the guide rail 4 and is connected with the guide rail 4 in a sliding way. The guide rail 4 both sides have been seted up spout 5 along its length direction, and connecting rod 3 is kept away from 2 one ends of back spreader bar and is worn to establish and be fixed with first axis of rotation 6, and two spouts 5 are passed respectively at first axis of rotation 6 both ends, and first axis of rotation 6 rotates and connects in spout 5 and sliding connection in spout 5.
As shown in fig. 1, a driving member 7 for driving one end of the connecting rod 3 to move axially along the central shaft 1 is provided at one side of the connecting rod 3. The driving member 7 may be a cylinder, a hydraulic cylinder, etc. One end of the driving member 7 is fixedly provided with a connecting seat 8, and the connecting seat 8 is abutted against one side of the connecting rod 3. Wear to establish on connecting seat 8 and be fixed with second axis of rotation 9, seted up compensation groove 10 along its length direction on the connecting rod 3, second axis of rotation 9 passes compensation groove 10 and rotates and connect in connecting rod 3, second axis of rotation 9 sliding connection in compensation groove 10.
As shown in fig. 1, one end of the connecting rod 3 is driven by the driving member 7 to move axially along the central shaft 1, so as to drive the upper end of the connecting rod 3 to rotate, so that the connecting rod 3 drives the back expansion rod 2 to rotate relative to the central shaft 1, thereby achieving the purpose of adjusting the angle of the back expansion rod 2 relative to the central shaft 1, and changing the length of the back expansion rod 2 projected along the vertical direction. Namely, the diameter of the back expander is changed, and the back expander can be suitable for back expanding channels with various sizes.
As shown in fig. 1, in order to reduce the possibility of deformation of the back-expanding rod 2 during back expansion, a support rod 11 is arranged between the back-expanding rod 2 and the central shaft 1, and the support rod 11 is arranged in a telescopic manner. The support rod 11 comprises a first rod 12 and a second rod 13 sleeved outside the first rod 12, the second rod 13 is connected to the first rod 12 in a sliding mode, one end, far away from the first rod 12, of the second rod 13 is connected to the central shaft 1 in a rotating mode, and one end, far away from the second rod 13, of the first rod 12 is connected to the back expansion rod 2 in a rotating mode.
As shown in fig. 1, for the convenience of back expansion, a plurality of back expansion thorns 14 are arranged on one side of the back expansion rod 2, which is back to the connecting rod 3. The central shaft 1 is arranged in a hollow mode, the guniting pipe 15 is arranged on the central shaft 1 along the radial direction of the central shaft, and the guniting pipe 15 is communicated with the central shaft 1. When the drilling tool is used, the central shaft 1 can be grouted through the grouting pipe 15, mud is sprayed into the drill hole through the grouting pipe, and the effects of cooling the back-reaming device, carrying drill cuttings and discharging the drill cuttings to the ground surface, stabilizing the hole wall and reducing the back-dragging force required during back reaming are achieved.
Example two:
a maintenance technology for a municipal sewage pipe is characterized in that: comprises the following steps of (a) carrying out,
s1, safety containment of the construction area range;
s2, plugging sewage wells at the upstream and the downstream of the pipeline to be maintained;
s3, deep well precipitation: excavating deep wells at two sides of each sewage well respectively to reduce water, and recovering the road surface after construction;
s4, temporary drainage: a sewage pump is used for draining the pipeline to be maintained;
s6, excavating an earth entering and exiting pit; digging an in-soil working pit and an out-soil working pit at two ends of a pipeline to be maintained, wherein the in-soil working pit is a chute with the depth of 2.5 meters, the length of 6 meters and the width of 1.5 meters; the unearthed working pit is a chute with the depth of 2.5 meters, the length of 6 meters and the width of 1.5 meters and is used for discharging slurry and storing the slurry and dragging a pipe back;
s7, pre-punching: the diameter of a hole which enters any sewage well at the middle section of the pipeline to be maintained and is drilled manually is phi 550mm, and the center of the drilled hole is lifted by 100mm compared with the center of the sewage pipeline; before manual hole opening, whether the content of biogas and toxic substances in a sewage well is in a safe range or not must be checked, if the content exceeds the standard, ventilation and toxic gas exhaust must be carried out firstly, and personnel construction can not be arranged until the ventilation reaches the standard;
s8, drilling a guide hole: after the equipment is in place, the guided drilling is started from the working pit into the earth, and the guide track passes through the original deformed pipeline through the gradual adjustment of the downward drilling slope guidance;
the drilling machine is randomly provided with a portable earth surface navigator which is used for determining the position of the drill bit at the ground bottom and monitoring whether the drill bit deviates from a designed track; in the deflecting section, the position of the drill bit is measured once every 30cm of drilling, and the position of the drill bit is monitored once every 1 m in the tiling section; if the deviation from the track is found, correcting the deviation by adjusting the direction of the inclined plane of the drill bit; but the deviation correction cannot be too urgent because the drill rod has certain rigidity after all; the deviation correction can be finished in a plurality of drill rods, the deviation correction can not be finished in one drill rod, and meanwhile, the deviation correction is not excessive;
using slurry when the pilot hole is drilled, and spraying the drilling slurry into the drill hole through a slurry mixing system, an airborne slurry pump and a pilot bit; the mud comprises the following raw materials, by weight, 7-8% of pre-hydrated sodium bentonite, 0.2-0.4% of tackifier and 0.3% of filtrate reducer;
s9, crushing the original pipe: after the drill is drilled, a back-expanding device with a knife edge is installed, and back expansion is carried out along a guide track, so that the original deformed pipeline is squeezed, expanded and crushed; step S8 is carried out again, the connecting rod on the back expander is driven to rotate by the driving piece, the back expander is expanded to a proper size, and back expansion is carried out again;
back expanding for three times until the channel is expanded to be 1.4-1.6 times of the outer diameter of the pipeline to be installed; the diameter of the back expander is smaller than the inner diameter of the original pipeline during the first reaming, the diameter of the back expander is larger than the inner diameter of the original pipeline during the second reaming and the third reaming, and the lower base points coincide during the third reaming; when in hole expansion, the hole expansion speed cannot be too fast, the hole expansion time is longer than 3 minutes per root, the uniform hole expansion speed cannot be neglected, so that the mud in the hole is uniformly distributed, and the reverse thrust in the hole expansion direction of the back expander is strictly forbidden to reduce the uneven distribution of the mud;
during back expansion, using slurry, and spraying the slurry into a drill hole through a slurry mixing system, an airborne slurry pump, a guide drill bit and a back expander; the liquid level in the slurry pit in the working pit is always kept higher than the elevation of the drilled hole in the back expansion process;
the mud comprises the following raw materials, by weight, 7-8% of pre-hydrated sodium bentonite, 0.3-0.5% of viscosity-increasing agent and 0.4% of fluid loss additive; the Ma's viscosity value of the slurry is 45-55 seconds, the specific gravity of the slurry is more than 1.03, and the specific gravity of the slurry generated after the slurry is injected into soil and mixed with clay is more than 1.10;
s10, back-expanding back-dragging: connecting the penetrated pipeline for pipe drawing after the back expansion head transfer case used in the last back expansion, welding and drawing the pipe according to the pipeline installation requirement, detaching the back expansion head and the transfer case after the pipeline is drawn to a preset position, and taking out the rest drill rods;
when back dragging, using mud, and spraying the back dragging mud into the drill hole through a mud mixing system, an airborne mud pump, a guide drill bit and a back expander; the liquid level in the slurry pit in the working pit is always kept higher than the elevation of the drilled hole in the back expanding and back dragging process;
the mud comprises the following raw materials, by weight, 7-8% of pre-hydrated sodium bentonite, 0.3-0.5% of viscosity improver, 0.4% of fluid loss additive and 2% -3% of lubricant;
s12, cutting a well chamber pipeline, cutting the pipeline in the well along the wall of the well after the pipe is pulled in place, filling gaps between the opening and the pipeline with through sintered bricks, and pouring cement mortar;
s13, grouting and reinforcing surrounding soil: after the pipeline construction is finished, grouting and reinforcing surrounding soil bodies, grouting on the top surface of the west non-motor vehicle roadbed, arranging the punching and grouting depth at 4m and 2m in a staggered manner, wherein the longitudinal distance between grouting holes is 0.8m, the transverse distance is 1.2m, and the average actual grouting amount of each hole is 0.65 cubic meter/meter;
and S14, cleaning and removing the yard on site.
The above description is only a preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments, and all technical solutions belonging to the idea of the present invention belong to the protection scope of the present invention. It should be noted that modifications and embellishments within the scope of the invention may occur to those skilled in the art without departing from the principle of the invention, and are considered to be within the scope of the invention.
Claims (7)
1. A maintenance technology for a municipal sewage pipe is characterized in that: comprises the following steps of (a) carrying out,
s1, safety containment of the construction area range;
s2, plugging sewage wells at the upstream and the downstream of the pipeline to be maintained;
s3, deep well precipitation: excavating deep wells at two sides of each sewage well respectively to reduce water, and recovering the road surface after construction;
s4, temporary drainage: a sewage pump is used for draining the pipeline to be maintained;
s6, excavating an earth entering and exiting pit; digging an in-soil working pit and an out-soil working pit at two ends of a pipeline to be maintained;
s7, pre-punching: entering any sewage well at the middle section of the pipeline to be maintained for manual tapping, wherein the tapping size is phi 550mm, and the center of the tapped hole is lifted by 100mm above the center of the sewage pipeline;
s8, drilling a guide hole: after the equipment is in place, the guided drilling is started from the working pit into the earth, and the guide track passes through the original deformed pipeline through the gradual adjustment of the downward drilling slope guidance;
s9, crushing the original pipe: after the drill is drilled, a back-expanding device with a knife edge is installed, and back expansion is carried out along a guide track, so that the original deformed pipeline is squeezed, expanded and crushed; step S8 is carried out again, then the back-expanding device with larger radius is replaced, back expansion is carried out again, and the steps are repeated until the channel is expanded to be 1.4-1.6 times of the outer diameter of the pipeline to be installed; the back expansion device comprises a central shaft (1) used for connecting a drill rod, a back expansion rod (2) rotatably connected to the central shaft (1) and a connecting rod (3) rotatably connected to the back expansion rod (2), wherein a plurality of back expansion rods (2) and the connecting rod (3) are arranged along the circumferential direction of the central shaft (1), a plurality of back expansion thorns (14) are arranged on the outer side of the back expansion rod (2), one end, far away from the back expansion rod (2), of the connecting rod (3) is rotatably connected to the central shaft (1) and is axially and slidably connected to the connecting rod (3) along the central shaft (1), and a driving piece (7) used for driving one end of the connecting rod (3) to axially move along the central shaft (1) is arranged on one; a support rod (11) is arranged between the back expansion rod (2) and the central shaft (1), the support rod (11) is arranged in a telescopic manner, and two ends of the support rod (11) are respectively and rotatably connected to the central shaft (1) and the back expansion rod (2); the central shaft (1) is arranged in a hollow manner, a guniting pipe (15) is arranged on the central shaft (1) along the radial direction of the central shaft, and the guniting pipe (15) is communicated with the central shaft (1);
s10, back-expanding back-dragging: connecting the penetrated pipeline for pipe drawing after the back expansion head transfer case used in the last back expansion, welding and drawing the pipe according to the pipeline installation requirement, detaching the back expansion head and the transfer case after the pipeline is drawn to a preset position, and taking out the rest drill rods;
s12, cutting a well chamber pipeline; after the pipe is pulled in place, the pipeline in the well is cut off along the wall of the well, and gaps between the opening and the pipeline are filled with through sintered bricks and cement mortar is poured;
s13, grouting and reinforcing surrounding soil;
and S14, cleaning and removing the yard on site.
2. The process of claim 1 for repairing a municipal sewage pipe, wherein: using the mud, injecting the mud into the borehole via a mud mixing system, an onboard mud pump, a pilot bit, and a back reamer in steps S8, S9, and S10; and the liquid level in the slurry pit in the working pit is always kept higher than the elevation of the drilled hole in the back expansion process.
3. A repair process for a municipal sewage pipe according to claim 2, wherein: the slurry used in step S8 includes, by weight, 7 to 8% of pre-hydrated sodium bentonite, 0.2 to 0.4% of a tackifier, and 0.3% of a fluid loss additive.
4. A repair process for a municipal sewage pipe according to claim 3, wherein: the slurry used in step S9 includes, by weight, 7 to 8% of a pre-hydrated sodium bentonite, 0.3 to 0.5% of a viscosity-enhancing agent, and 0.4% of a fluid loss additive.
5. A repair process for municipal sewage pipes according to claim 4, wherein: when the mud is re-expanded in the step S9, the Markov viscosity value of the mud is between 45 and 55 seconds, the specific gravity of the mud is greater than 1.03, and the specific gravity of the mud generated after the mud is injected into the soil and mixed with the clay is greater than 1.10.
6. A repair process for a municipal sewage pipe according to claim 5, wherein: in step S9, a third back reaming is performed, where the diameter of the back reamer is smaller than the inner diameter of the original pipeline during the first reaming, the diameter of the back reamer is larger than the inner diameter of the original pipeline during the second reaming and the third reaming, and the lower base points coincide with each other during the third reaming.
7. A repair process for a municipal sewage pipe according to claim 6, wherein: the slurry used in step S10 includes, by weight, 7 to 8% of a pre-hydrated sodium bentonite, 0.3 to 0.5% of a viscosity-enhancing agent, 0.4% of a fluid loss additive, and 2% to 3% of a lubricant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810103751.4A CN108222221B (en) | 2018-02-01 | 2018-02-01 | Maintenance process for municipal sewage pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810103751.4A CN108222221B (en) | 2018-02-01 | 2018-02-01 | Maintenance process for municipal sewage pipe |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108222221A CN108222221A (en) | 2018-06-29 |
| CN108222221B true CN108222221B (en) | 2020-06-26 |
Family
ID=62669416
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810103751.4A Active CN108222221B (en) | 2018-02-01 | 2018-02-01 | Maintenance process for municipal sewage pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108222221B (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109252458B (en) * | 2018-10-31 | 2020-09-29 | 重庆市排水有限公司 | Box culvert emergency drainage construction method |
| CN110281514B (en) * | 2019-08-02 | 2021-12-03 | 曾婧 | Cooling and shaping equipment for plastic products |
| CN111075000B (en) * | 2020-01-03 | 2020-12-15 | 温州市宏泰建设有限公司 | A maintenance of equipment for municipal administration blow off pipe |
| CN111156020B (en) * | 2020-01-03 | 2021-03-16 | 温州市宏泰建设有限公司 | Non-excavation maintenance equipment for sewer line and construction method thereof |
| CN111608588B (en) * | 2020-06-15 | 2022-06-21 | 佛山电力设计院有限公司 | Geological exploration is along with boring reaming device |
| CN114165162A (en) * | 2021-11-30 | 2022-03-11 | 中铁八局集团第一工程有限公司 | Construction method of ultra-long downward-penetrating directional drilling and pipe-pulling method |
| CN114149795A (en) * | 2021-11-30 | 2022-03-08 | 中铁八局集团第一工程有限公司 | Guide hole wall protection slurry |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1002932B1 (en) * | 1998-11-18 | 2004-09-29 | FlowTex Technologie GmbH & Co. KG | Process and device for trenchless replacement of conduits |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101457853B (en) * | 2008-11-20 | 2012-04-25 | 江苏广宇建设集团有限公司 | Non-digging tube-pulling construction method |
| CN103851257B (en) * | 2014-03-18 | 2015-10-28 | 国家电网公司 | Based on the trustship construction process in laying cable duct bank |
| CN205638236U (en) * | 2016-04-20 | 2016-10-12 | 广西建工集团第二安装建设有限公司 | Anchor eye reaming is returned and is expanded head |
| CN106088293A (en) * | 2016-06-23 | 2016-11-09 | 厦门市安越非开挖工程技术有限公司 | A kind of small-bore sewage conduct restorative procedure |
| CN106481881B (en) * | 2016-12-22 | 2018-12-07 | 上海煤气第二管线工程有限公司 | A kind of original pipe position no-dig technique splits the construction method that pipe repairs underground piping |
-
2018
- 2018-02-01 CN CN201810103751.4A patent/CN108222221B/en active Active
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1002932B1 (en) * | 1998-11-18 | 2004-09-29 | FlowTex Technologie GmbH & Co. KG | Process and device for trenchless replacement of conduits |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108222221A (en) | 2018-06-29 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108222221B (en) | Maintenance process for municipal sewage pipe | |
| CN113833480B (en) | Construction method for initial tunneling and arrival of shield | |
| Chen et al. | Long rectangular box jacking project: a case study | |
| CN100410485C (en) | Construction method for push pipe by cooperation of horizontal auger driller and horizontal directional driller | |
| CN108661655B (en) | Large-section U-shaped earth pressure balance shield tunnel construction method based on U-shaped shield machine | |
| CN112012753B (en) | Shield tunneling machine starting method based on special-shaped extension steel ring | |
| CN104747202A (en) | Multi-cutter head combined type cutting system for rectangular pipe pushing machine | |
| CN116006080A (en) | Quick-replacement back-reaming device and reaming method | |
| CN108361466A (en) | A kind of municipal pipeline maintenance construction technique | |
| CN112160324A (en) | Construction method for deep foundation pit support | |
| Damvergis | Sewer systems: Failures and rehabilitation | |
| CN113669073A (en) | Water-rich sandy stratum tunnel-first and station-second construction method for controlling deformation of adjacent building | |
| CN111560950A (en) | Pile hole forming method for cast-in-place pile | |
| CN111042820B (en) | Construction method for sand layer with oversized pilot hole by vertical shaft raise-shaft method | |
| O’Dwyer et al. | Blackpool south strategy project: analysis of pipe jacking records | |
| CN117071611A (en) | Seepage-proofing system of earth-rock dam cofferdam and construction method thereof | |
| CN116291471A (en) | Construction method and tunneling equipment for large-diameter vertical shaft of upper soft and lower hard stratum | |
| CN114508629B (en) | Pipe jacking construction method for penetrating through mixed gravel layer and sandstone layer | |
| CN113309524B (en) | Control method for influence of rectangular pipe jacking tunneling of shallow earth stratum on surrounding environment | |
| CN214997645U (en) | Be applicable to subway station goes out inlet pipe curtain construction pipe curtain structure | |
| RU165963U1 (en) | DRILLING RIG SUPPORT USED FOR STRENGTHENING EARTH STRUCTURE | |
| CN110043272B (en) | Method for controlling gushing in tunneling process of shield tunneling machine | |
| CN204532359U (en) | The multi-cutter-disk combined type cutting system of rectangular pipe jacking machine | |
| CN113338950A (en) | Shield closed arrival construction method of freezing method and cement system combined steel sleeve | |
| CN114215111B (en) | Top-pulling combined non-excavation pipeline construction method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |