CN102679040B - Construction method for preventing reinforced concrete pipe joint from being damaged and leaking slurry in pipe-jacking construction - Google Patents
Construction method for preventing reinforced concrete pipe joint from being damaged and leaking slurry in pipe-jacking construction Download PDFInfo
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- CN102679040B CN102679040B CN201210153542.3A CN201210153542A CN102679040B CN 102679040 B CN102679040 B CN 102679040B CN 201210153542 A CN201210153542 A CN 201210153542A CN 102679040 B CN102679040 B CN 102679040B
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Abstract
The invention relates to a construction method for preventing reinforced concrete pipe joints from being damaged and leaking slurry in a pipe-jacking construction, which comprises the following steps: 1) examining overload stress generating parts in a jacking process so as to determine whether a pipe joint is damaged or not when jacking force is overlarge in the jacking process; 2) primarily processing a damaged part of the pipe joint; 3) carrying out a leakage-preventing processing on the damaged part of the pipe joint; and 4) carrying out reinforcing processing on the damaged part of the pipe joint according to the pipe joint damage degree judged in step 2) (1). With the construction method disclosed by the invention, secondary damage caused by the large inward deformation of concrete can be restrained, and a steel pipe can replace the damaged concrete part to play the function of transmitting the jacking force when the damage is relatively serious.
Description
Technical field
What the present invention relates to is the construction technology in a kind of subsurface building works technical field, specifically a kind of method of construction that prevents the breakage of reinforced concrete tube coupling and spillage.
Background technique
Reinforced concrete pipe-jacking technology is because economy is good, quick construction, the main form of construction work in small-bore push pipe tunnel in progressively becoming.In the jacking operation process of concrete reinforced pipe push pipe, concrete is being pressed, curved etc. under cooperative action, may occur in part that concrete reaches its ultimate bearing capacity and the phenomenon destroyed, thereby cause pipe end damaged and the bulk strength that closes water function and tube coupling of drainage pipe is affected.When this disrepair phenomenon is seriously when producing " broken pipe ", whole engineering will be scrapped.Certainly the impact that pipe end breakage brings is not only embodied on the bulk strength of its tube coupling, is also embodied in therefore and in the spillage problem producing.In push pipe jack-in process, in order to reduce the frictional force between tube wall and the soil body, conventionally adopt the method for injecting bentonite slurry outside tube wall to carry out drag reduction.Therefore in work progress, probably there is bentonite slurry and by tube coupling interface or tube wall breakage spot, infiltrated the phenomenon of push pipe tube wall the inside, affect grouting result, thereby affect top power, control and Land-Subsidence Control.The generation of spillage can make the resistance of tube wall increase, thereby top power is increased, and the stressed increase of tube coupling causes the possibility of pipe end breakage to increase, and causes vicious circle.
Do not find by prior art documents the relevant technical paper of technology therewith.At present, in jacking construction, generally by rubber seal, prevent the infiltration of bentonite slurry.And according to the difference of operating mode, the method for construction adopting and tube wall Interface Shape, the rubber seal adopting is also not quite similar.What in reality engineering, conventionally adopt is polyurethane shutoff method.Though the method can fast and effeciently solve spillage problem, expense is higher, and is only applicable to the spillage problem that dislocation or torsion by rubber ring bring.If polyurethane shutoff method is used in while solving the spillage problem that pipe end breakage or tube coupling breakage bring, its consequence may will cause the continuation of tube coupling damaged, even " broken pipe ".In order effectively to solve the spillage problem of being brought by pipe end or tube coupling breakage, should on the basis of shutoff, further reinforce, to prevent the generation of two degree breakages.
Summary of the invention
Of the present invention to the effect that for the deficiencies in the prior art, a kind of local method of construction that breakage and then spillage problem occur of tube coupling that solves is provided.The method can not only be stopped spillage effectively, can also carry out the again generation of reinforcement protection to prevent from destroying to there is damage location.
The present invention is achieved by the following technical solutions, comprises the following steps:
The first step, while occurring in jack-in process that top power is excessive, the position that overload stresses in jacking is produced is investigated, and determines whether tube coupling destroys.
The position that described overload stresses produces is determined by the following method:
1. tube coupling is in conduit axis direction, under the impact of the factors such as earth pressure, the inside and outside hydraulic pressure of pipe, pipe deadweight, the load of tube coupling vertical direction is greater than the load of tube coupling substantially horizontal, make the left and right part of tube coupling may occur the tensile stress on dangerous vertical direction, the left and right of tube coupling is partly the position that overload stresses produces.
2. in Curve Pipe Jacking, crooked axis makes the very easy origination point contact of madial wall of push pipe concentrate with stress, finally at madial wall, transships.Not only Curve Pipe Jacking is like this, even be also difficult to remain on the state of straight line in straight line push pipe medial axis always, often can under axis impact out of control, produce crooked and cause madial wall to transship.
3. due to the cross section of pipe end, to be slightly less than the most areas of pipe, make stress be greater than other places at pipe end place.And due to pipe end under the impact of the factors such as axis is out of control in a multiple area of contact, make pipe end become overload the larger area of density occur.
Second step, destroys part to tube coupling and carries out preliminary treatment;
1. when having ash bits to come off or tube wall crust the phenomenon such as comes off while occurring, stop immediately jacking and observe to destroy occurring whether seriously.If come off, area is large or while having the muscle of revealing phenomenon to occur, and can think that breakage occurs comparatively seriously; Otherwise, think that breakage occurs not seriously.If breakage occurs comparatively seriously, at destruction place, smear slush immediately, while smearing because trying one's best compacting make smooth surface.If breakage occurs not seriously, directly carry out next step.
2. check that destruction place has or not the generation of spillage phenomenon.If there is the generation of spillage phenomenon, at spillage place polyurethane instantaneous leaking-stopping, until its solidify and successful leak stopping after carry out next step.If there is no the generation of spillage phenomenon, directly carry out next step.
The 3rd step, to tube coupling destruction, place carries out anti-drain process;
1. at tube coupling, destroy the place ahead and rear partly and dig out respectively the circular space that cross section is rectangle.During excavation, should note keeping certain distance with the part of destroying, to prevent that destruction place is formed through larger destruction face with excavation place.And it is identical with the width of hollowed out gap to insert width in dug out circular space, but the bigger water proof rubber circle of the degree of depth that Thickness Ratio digs.
2. for preventing steel pipe corrosion and guaranteeing sealing effect, the bigger black rubber skin of the distance between Length Ratio digging ring is covered at destruction place under the prerequisite of two water proof rubber circles by glue and tube wall bonding around and be fixed up, make a rubber peel annulus of its formation.The sealer shutoff of the jointing of rubber peel annulus.
The 4th step, the critical conditions that the tube coupling that 1. judged according to second step destroys, to tube coupling destruction, place carries out consolidation process;
As damaged occur to such an extent that not seriously directly external diameter each curved plate identical with tube wall internal diameter after curved plate combination well both can by following sequential combination 1..Three narrower curved plates of the bossed width of end face are inserted in the main body steel plate that width is larger and are gone, and after curved plate two ends end face is smooth and that thickness is less be inserted into last left blank space, and the two ends of in the end inserting the upper surface of steel plate are inserted in the reserved space of main body steel plate with two curved plates, total is fixed into circular.After combining, just can continue jacking.
2. as breakage occurs comparatively seriously, in the both sides of black rubber skin, dig out the annulus that two cross sections are rectangle.Both sides at dug out annulus are stained with headblock separately, and by the curved plate of the annular protrusions that is rectangle with two cross sections by the 4th rapid sequential combination 1. step by step.Just can continue jacking afterwards.
The present invention can be realized and be stoped the secondary that concrete produces to inner large deformation to destroy by the utilization of technique scheme, and when damaged generation is more serious, available said method makes steel pipe substantially replace the concrete that destroys part to play the effect of transmitting top power.
Accompanying drawing explanation
Fig. 1 is rubber seal layout plan;
Fig. 2 is black rubber skin layout plan;
Fig. 3 is that black rubber skin is arranged sectional drawing;
Fig. 4 is that steel plate member has been assembled sectional drawing;
Fig. 5 is the member connection diagram of steel plate 11,13,14;
Fig. 6 is the member connection diagram of steel plate 12.
Fig. 7 is for having repaired figure
In figure: pipe end breakage spot 1, the breakage section of smearing 2, rubber seal 3, push pipe tube wall 4, black rubber skin annulus 5, sealer 6, steel plate 7-15, headblock 16.
Embodiment
Below in conjunction with accompanying drawing, embodiments of the invention are elaborated: the present embodiment is implemented take technical solution of the present invention under prerequisite, provided detailed mode of execution and concrete operating process, but protection scope of the present invention is not limited to following embodiment.
Embodiment take Shanghai City waste water treatment project certain section be example.This section of push pipe is long apart from serpentine Curve Pipe Jacking, by three sections of radius of curvature R=600 curves and one section of rectilinear(-al), and top journey 747m.Push pipe tubing adopts
type pipe (2m/ joint), push pipe tube wall thickness 190mm.During jacking 613m, run into the excessive problem of top power.For guaranteeing engineering success, adopt the method for the invention.Embodiment is as follows.
The first step, finds in jack-in process that top power is excessive, and the position that overload stresses in jacking is produced is investigated, and at the place, pipe end inner side of Curve Pipe Jacking 486m, has found that tube wall crust comes off and follows the Lou phenomenon of muscle.
Second step, to destruction, place carries out preliminary treatment;
1. find to exist tube wall crust come off and leak muscle phenomenon, stop immediately jacking, larger through observing the area of finding to come off, judgement destroys comparatively serious.Therefore at destruction place, smear slush, make that mortar is closely knit, smooth surface as far as possible.
2. in tube wall, there is spillage phenomenon, polyurethane is spread upon to place, crack and mortar and the place's leak stopping of concrete interface, and treat that it solidifies.
The 3rd step, to destruction, place carries out anti-drain process;
The slush 2 of 1. smearing at pipe end breakage spot 1 is dug out two circular spaces that the wide 3cm of 3cm is dark in the place of outside 5cm separately with tube wall intersection, and in digging ring, inserts the rubber seal 3 that the wide 4cm of 3cm is high.As shown in Figure 1.
2. width is sticked into an annulus at place, tube wall inner side with glue than the black rubber skin 5 of two large 10cm of seal ring spacing, the distance of the edge of black rubber skin 5 and adjacent rubber seal 3 is 5cm.The interface of black rubber skin 5 is got up with sealer 6 shutoff.As shown in Figure 2.
The 4th step, 1. judges that according to second step this place tube coupling destroys comparatively serious, so select on curved plate steel plate with projection steel loop as combiner.First in the both sides of black rubber skin, dig out two dark annulus of the wide 10cm of 6cm, in the both sides of digging out annulus, be respectively stained with the headblock 16 that 1cm is thick, and the curved plate with the high steel loop of the wide 10cm of 4cm combines in the steps below by curved plate outside.Curved plate 7,8,9,10 is delivered to tube coupling damage location and insert curved plate 11,12,13,14 and connect into the toroidal shown in Fig. 4.Its concrete measure, for first insert as shown in Figure 5 steel plate 11 between curved plate 7 and curved plate 8, according to said method inserts between steel plate 9 and steel plate 10 by steel plate 13 more afterwards, steel plate 14 is inserted between steel plate 7 and steel plate 10.Finally steel plate 12 is inserted between steel plates 8 and steel plate 9, and steel plate 15 is inserted in steel plate 8 and the reserved space of steel plate 9, as shown in Figure 6.Finally realize complete connection as shown in Figure 7.
After reparation completes, when push pipe continues jacking there is not cracking destruction situation in repair place again.Also confirmed that this invents good treatment effect.
The present invention is in order effectively to solve the spillage problem of being brought by pipe end or tube coupling breakage, on the basis of shutoff, further reinforce, realize and stop the secondary that concrete produces to inner large deformation to destroy, when damaged generation is more serious, available said method makes steel pipe substantially replace the concrete that destroys part to play the effect of transmitting top power.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.Those skilled in the art, read after foregoing, for multiple modification of the present invention with to substitute will be all apparent.Therefore, protection scope of the present invention should be limited to the appended claims.
Claims (3)
1. a method of construction that prevents the breakage of reinforced concrete tube coupling and spillage in jacking construction, is characterized in that comprising the following steps:
The first step, while occurring in jack-in process that top power is excessive, the position that overload stresses in jacking is produced is investigated, and determines whether tube coupling destroys;
Second step, destroys part to tube coupling and carries out preliminary treatment;
If 1. breakage occurs seriously, at destruction place, smear slush immediately, the compacting make smooth surface of should trying one's best while smearing; If breakage occurs not seriously, directly carry out 2. following;
When having ash bits to come off or tube wall crust comes off, stop immediately jacking and observe to destroy occurring whether seriously, if the area that comes off is large or while having the muscle of revealing phenomenon to occur, think that breakage occurs seriously; Otherwise, think that breakage occurs not seriously;
2. check that destruction place has or not the generation of spillage phenomenon, if there is the generation of spillage phenomenon, at spillage place polyurethane instantaneous leaking-stopping, until its solidify and successful leak stopping after carry out the 3rd step; If there is no the generation of spillage phenomenon, directly carry out the 3rd step;
The 3rd step, to tube coupling destruction, place carries out anti-drain process;
1. at tube coupling, destroy the place ahead and rear partly and dig out respectively the circular space that cross section is rectangle, during excavation, should note keeping certain distance with the part of destroying, to prevent that destruction place is formed through larger destruction face with excavation place, and at the built-in water proof rubber circle in dug out circular space;
2. the width black rubber skin more bigger than the distance between digging ring covered under the prerequisite of two water proof rubber circles at destruction place, by glue and the bonding of tube wall around, be fixed up, make it form a rubber peel annulus, the sealer shutoff of the jointing of rubber peel annulus;
The 4th step, the critical conditions that the tube coupling that 1. judged according to second step destroys, to tube coupling destruction, place carries out consolidation process;
1. as damaged, occur not serious directly that each curved plate identical with tube wall internal diameter of the external diameter after curved plate combination is well by following sequential combination: three narrower curved plates of the bossed width of end face are inserted in the main body steel plate that width is larger and are gone, and after curved plate two ends end face is smooth and that thickness is less be inserted into last left blank space, and the two ends of in the end inserting the upper surface of steel plate are inserted in the reserved space of main body steel plate with two curved plates, total is fixed into circular; After combining, continue jacking;
2. as breakage occurs seriously, in the both sides of black rubber skin, dig out the annulus that two cross sections are rectangle, both sides at dug out annulus are stained with headblock separately, and by the curved plate of the annular protrusions that is rectangle with two cross sections by step sequential combination 1. in the 4th step, continue afterwards jacking.
2. the method for construction that prevents the breakage of reinforced concrete tube coupling and spillage in jacking construction according to claim 1, is characterized in that: in the first step, the position that described overload stresses produces is determined by the following method:
1. tube coupling is in conduit axis direction, under the impact of earth pressure, the inside and outside hydraulic pressure of pipe, pipe deadweight factor, the load of tube coupling vertical direction is greater than the load of tube coupling substantially horizontal, make the left and right part of tube coupling may occur the tensile stress on dangerous vertical direction, the left and right of tube coupling is partly the position that overload stresses produces;
2. in Curve Pipe Jacking, crooked axis makes the very easy origination point contact of madial wall of push pipe concentrate with stress, finally at madial wall, transship, not only Curve Pipe Jacking is like this, even be also difficult to remain on the state of straight line in straight line push pipe medial axis always, often can under axis impact out of control, produce crooked and cause madial wall to transship;
3. due to the cross section of pipe end, to be slightly less than the most areas of pipe, make stress be greater than other places at pipe end place, and due to pipe end under the impact of axis factor out of control in a multiple area of contact, make pipe end become overload the larger area of density occur.
3. the method for construction that prevents the breakage of reinforced concrete tube coupling and spillage in jacking construction according to claim 1, is characterized in that: in the 3rd step, 1., described water proof rubber circle width is identical with the width of hollowed out gap, but the degree of depth that Thickness Ratio digs is bigger.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210153542.3A CN102679040B (en) | 2012-05-15 | 2012-05-15 | Construction method for preventing reinforced concrete pipe joint from being damaged and leaking slurry in pipe-jacking construction |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210153542.3A CN102679040B (en) | 2012-05-15 | 2012-05-15 | Construction method for preventing reinforced concrete pipe joint from being damaged and leaking slurry in pipe-jacking construction |
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| Publication Number | Publication Date |
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| CN102679040A CN102679040A (en) | 2012-09-19 |
| CN102679040B true CN102679040B (en) | 2014-12-10 |
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| CN114658921B (en) * | 2022-02-28 | 2023-10-27 | 中铁四局集团有限公司 | Pipe-jacking pipeline reinforcement construction method |
| CN115143318A (en) * | 2022-06-23 | 2022-10-04 | 中国五冶集团有限公司 | Treatment method for incapability of drilling of jacking pipe in sand gravel layer jacking pipe construction process |
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| CN2655009Y (en) * | 2003-11-27 | 2004-11-10 | 林永志 | Internal locking sealing band for pipe |
| KR100620746B1 (en) * | 2004-12-01 | 2006-09-12 | 두산중공업 주식회사 | Constructing Method for Pipe Supporting Concrete Structure |
| CN201031999Y (en) * | 2007-06-14 | 2008-03-05 | 上海市基础工程公司 | Relay ring of sand doped fiber glass reinforced pipes |
| US20090148239A1 (en) * | 2007-12-10 | 2009-06-11 | Hickey Ii Gary M | Resilient protection of through-foundation pipes |
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