CN102877415B - Ultra-high-difference, ultra-long and ultra-large-tonnage prestress pipeline grouting method and herring-bone pipe bundle - Google Patents
Ultra-high-difference, ultra-long and ultra-large-tonnage prestress pipeline grouting method and herring-bone pipe bundle Download PDFInfo
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- CN102877415B CN102877415B CN201210414986.8A CN201210414986A CN102877415B CN 102877415 B CN102877415 B CN 102877415B CN 201210414986 A CN201210414986 A CN 201210414986A CN 102877415 B CN102877415 B CN 102877415B
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Abstract
The invention discloses an ultra-high-difference, ultra-long and ultra-large-tonnage prestress pipeline grouting method, which comprises following steps of step 1, preparation before grouting: air outlet holes are prefabricated on a prestress pipeline, each air outlet hole is respectively communicated with an air outlet pipe, and the air outlet pipe extends to the outside of a herring-bone wall body pouring mold; and step 2, grouting of pipeline: two end ports are simultaneously grouted, the air outlet pipe with saturated outlet stock is sealed, and the grouting construction is stopped until all air outlet pipes are sealed. Through grouting on two ends and the exhaustion of the air outlet holes which are ingeniously added, the air inside the prestress pipelines can be more efficiently and thoroughly exhausted, so that the grouting inside the pipeline can be compacted and holes cannot be easily generated, the structural duration is improved, and the construction process is simple.
Description
Technical field
The present invention relates to technical field of bridge construction, relate in particular to that a kind of superelevation is poor, overlength, super-tonnage prestress pipe grouting.
Background technology
Constructing in the fish ridge wall body process of Large Span Prestressed footpath (as 158m) concrete fish ridge continuous girder bridge, its fish ridge wall is as main stress structure, because of the particularity of its form of structure, fish keel prestressed strand pipeline superelevation poor (as 20m), overlength (as 156m), super-tonnage are (as 31-φ
s15.20), how various conventional bridge, guarantee its duct grouting compactness, to guarantee the durability of structure, is one of its key technology.
Conventional continuous girder bridge is deck type structure, the less (≤27-φ of the general tension tonnage of prestressed strand of employing
s15.20), the linear layout feature of its prestressed strand is, the longer steel bundle discrepancy in elevation is less, the conventional common grouting process that adopts of pumping of prostressed duct (is used cement paste, mix external additive, before mud jacking first with pressure clear water rinse will mud jacking duct, then cement paste is pressed into from the one end in hole, the other end is discharged underflow rear enclosed.Intensified pressure, to 0.5-0.7 MPa, continues to finish after 2-5 minute) or vacuum grouting method (on common grouting process basis, adopt air in vacuum pump evacuation aperture, make to form in duct the vacuum of negative pressure 0.1MPa, and then mud jacking).
Background engineering of the present invention is lower support type structure, and for reducing the weakening of prestress pipe to fish ridge wall body, the prestressed strand tension tonnage adopting in fish ridge wall body is large (as 31-φ
s15.20), its prestressed strand layout feature is, the longer steel bundle discrepancy in elevation is larger, wherein be arranged in steel Shu Chaochang (as 156m), the superelevation poor (as 20m) of top, if adopt conventional vacuum grouting method or common grouting process, easily cause local cavity, the leakiness of producing of pipe interior (particularly top), reduce the durability of structure.
Therefore, those skilled in the art be devoted to develop a kind of can reduce empty position in prestress pipe and improve that the superelevation of pipeline inner concrete compactness is poor, overlength, super-tonnage prestress pipe grouting.
Summary of the invention
Because the above-mentioned defect of prior art, technical problem to be solved by this invention be to provide a kind of can reduce empty position in prestress pipe and improve that the superelevation of pipeline inner concrete compactness is poor, overlength, super-tonnage prestress pipe grouting.
For achieving the above object, the invention provides that a kind of superelevation is poor, overlength, super-tonnage prestress pipe grouting, in building mould across the fish ridge wall body on the concrete fish ridge continuous girder bridge of footpath greatly, lay prestress pipe, then carry out the concreting of fish ridge wall body, reach after design strength at described concrete, carry out prestressed stretch-draw, then carry out the grouting construction of prestress pipe; Wherein, poor, the overlength of described superelevation, super-tonnage prestress pipe grouting comprise the following steps:
Preparation before step 1, grouting:
1.1, the prefabricated prestress pipe with venthole: comprise horizontal segment pipeline and the end tilting section pipeline with Shu Wan district, two described tilting section device for cleaning pipelines are crossed the mild conducting in described Shu Wan district and are connected in the two-port of described horizontal segment pipeline, and described venthole is arranged on described Shu Wan district and described horizontal segment pipeline;
1.2 while being deployed to the described prestress pipe with venthole described fish ridge wall body and building mould, and on described venthole, each conducting connects an escape pipe, and escape pipe is extended to described fish ridge wall body build outside mould.
Preferably, the gas outlet setting position of described escape pipe and the vertical distance of described venthole are not less than 50cm.
Preferably, at the interlude of described horizontal segment pipeline, a venthole is set, in the described Shu Wan district of two described tilting section pipelines, a venthole is respectively set, further improve exhaust effect.
Preferably, the described prestress pipe with venthole also comprises gas bushing, the described bobbin seal of giving vent to anger is set on described venthole pipeline of living in, describedly go out to be provided with connection valve in gas bushing, described connection valve and described venthole conducting, described escape pipe conducting is connected on described connection valve, adds out gas bushing and further facilitates being connected of venthole and escape pipe, connects better effects if.
Preferably, on described escape pipe, be labeled with the mark of corresponding different pipeline ventholes, avoid numerous escape pipes to obscure mutually.
Superelevation of the present invention is poor, overlength, super-tonnage prestress pipe grouting be by two ends mud jacking simultaneously, the mode of carrying out exhaust by interlude and Liang Duanshuwan district realizes that superelevation is poor, effective grouting of overlength, super-tonnage prestress pipe, reach compactness high, the few goal of the invention in position, cavity, and work progress simple and fast, the durability that has improved structure, construction technology is simple.
The present invention also proposes a kind of fish ridge tube bank, restrained by some multilayer build-ups that form with the prestress pipe of venthole, the described prestress pipe with venthole comprises horizontal segment pipeline and the end tilting section pipeline with Shu Wan district, two described tilting section device for cleaning pipelines are crossed the mild conducting in described Shu Wan district and are connected in the two-port of described horizontal segment pipeline, described venthole is arranged on described Shu Wan district and described horizontal segment pipeline, on described venthole pipeline of living in, bobbin seal is arranged with out gas bushing, describedly go out to be provided with connection valve in gas bushing, described connection valve and described venthole conducting.
Preferably, the described venthole arranging on prestress pipe with venthole described in every is three, one is arranged on the interlude of described horizontal segment pipeline, and two other is separately positioned in the described Shu Wan district of described tilting section pipeline, further improves exhaust effect.
Preferably, totally 60 of the described prestress pipes with venthole, are divided into 15 layers, every layer of 4 superimposed setting.
Preferably, on described connection valve, be circumscribed with escape pipe, on described escape pipe, be labeled with the mark of corresponding different pipeline ventholes.
Preferably, the gas outlet setting position of described escape pipe and the vertical distance of described venthole are not less than 50cm.
Fish ridge of the present invention tube bank is particularly useful for greatly across footpath concrete fish ridge continuous girder bridge, and according to designing requirement and the construction speed of its fish ridge wall body, the adaptive fish ridge wall body that is embedded in can mate, adopt easily prestress pipe two ends to carry out mud jacking simultaneously.
In sum, superelevation of the present invention is poor, overlength, super-tonnage prestress pipe grouting and the tube bank of fish ridge thereof, by two ends mud jacking and the ingenious venthole exhaust adding, can, more effectively by the air emptying in prestress pipe, make pipe interior mud jacking closely knit, be difficult for producing cavity, improve the durability of structure, construction technology is simple, can meet that superelevation is poor, overlength, super-tonnage prestress pipe grouting demand, is very suitable for greatly across footpath concrete fish ridge continuous girder bridge.
Below with reference to accompanying drawing, the technique effect of design of the present invention, concrete structure and generation is described further, to understand fully object of the present invention, feature and effect.
Brief description of the drawings
Fig. 1 is that a kind of superelevation of one embodiment of the present invention is poor, the schematic flow sheet of overlength, super-tonnage prestress pipe grouting and the tube bank of fish ridge thereof.
Fig. 2 is the structural representation of a kind of fish ridge tube bank of an embodiment.
Fig. 3 is the enlarged diagram of the local A of Fig. 2.
Fig. 4 is the structural representation in the B-B cross section of Fig. 2.
Fig. 5 is the structural representation of the single prestress pipe with venthole of fish ridge tube bank.
Fig. 6 is the Local C enlarged diagram of Fig. 4.
Detailed description of the invention
As shown in Figure 1, a kind of superelevation of a detailed description of the invention of the present invention is poor, overlength, super-tonnage prestress pipe grouting, in building mould across the fish ridge wall body on the concrete fish ridge continuous girder bridge of footpath greatly, lay prestress pipe, then carry out the concreting of fish ridge wall body, reach after design strength at described concrete, carry out prestressed stretch-draw, then carry out the grouting construction of prestress pipe; Wherein, poor, the overlength of described superelevation, super-tonnage prestress pipe grouting comprise the following steps:
Preparation before step S1, grouting:
S1.1, the prefabricated prestress pipe 2 with venthole as shown in Figure 3 and Figure 5: comprise horizontal segment pipeline 21 and the end tilting section pipeline 23 with Shu Wan district 22, two tilting section pipelines 23 are connected in the two-port of horizontal segment pipeline 21 by the mild conducting in Shu Wan district 22, and described venthole (not shown) is arranged on Shu Wan district 22 and horizontal segment pipeline 21;
S1.2, when the prestress pipe with venthole 2 is deployed to described fish ridge wall body and builds mould, on described venthole, each conducting connects an escape pipe 3, and escape pipe 3 is extended to described fish ridge wall body builds outside mould.
Step S2, duct grouting: the two-port by the prestress pipe 2 with venthole is carried out mud jacking construction simultaneously, ducted air is discharged to outside by venthole by escape pipe 3, two-port continues mud jacking, the escape pipe 3 that occurs full pulp is carried out to shutoff, until escape pipe 3 all after shutoff, is stopped to mud jacking construction.
Exemplary, as shown in Figure 6, the gas outlet setting position of escape pipe 3 and the vertical distance H of described venthole are 50cm; As shown in Figure 3, at the interlude of horizontal segment pipeline 21, a venthole is set, in two tilting section pipeline 23Shu Wan districts 22, a venthole is respectively set; As shown in Figure 5, prestress pipe 2 with venthole also comprises gas bushing 4, going out gas bushing 4 sealing shrouds is located on described venthole pipeline of living in, go out in gas bushing 4 and be provided with and connect valve 5, connect valve 5 and described venthole conducting, shown in Fig. 4, escape pipe 3 conductings are connected to and connect on valve 5, concrete, the conducting welding seamless steel pipe of the galvanized pipe that connects valve 5 in the middle of the described sleeve 4 of giving vent to anger can adopt, seals sheathed by silica gel by seamless steel pipe two-port and prestress pipe realization.Certainly, preferably other are greater than the distance of 50cm to the vertical distance H of gas outlet and venthole in other embodiments, also can need to select according to construction the height of other distances; The quantity of venthole and setting position also can arrange as required.
The superelevation of present embodiment is poor, overlength, super-tonnage prestress pipe grouting be by two ends mud jacking simultaneously, the mode of carrying out exhaust by the venthole in horizontal segment pipeline and Liang Duanshuwan district, left and right realizes that superelevation is poor, effective grouting of overlength, super-tonnage prestress pipe, reach compactness high, the few goal of the invention in position, cavity, and work progress simple and fast, the durability that has improved structure, construction technology is simple.
The present embodiment also proposes a kind of fish ridge tube bank, as shown in Figure 2 and Figure 4, by some multilayer build-up tube banks 1 that form with the prestress pipe 2 of venthole, as shown in Figure 3, comprise horizontal segment pipeline 21 and the end tilting section pipeline 23 with Shu Wan district 22 with the prestress pipe 2 of venthole, two tilting section pipelines 23 are connected in the two-port of horizontal segment pipeline 21 by the mild conducting in Shu Wan district 22, described venthole (not shown) is arranged on Shu Wan district 22 and horizontal segment pipeline 21, as shown in Figure 5, on described venthole pipeline of living in, bobbin seal is arranged with out gas bushing 4, go out in gas bushing 4 and be provided with and connect valve 5, connect valve 5 and described venthole conducting.Exemplary, the conducting welding seamless steel pipe of the galvanized pipe that connects valve in the middle of the sleeve 4 of giving vent to anger can adopt, seals sheathed by silica gel by seamless steel pipe two-port and prestress pipe realization.
Concrete, as in Figure 2-4, tube bank 1 adopts 60 prestress pipes 2 with venthole, is divided into 15 layers, every layer of 4 superimposed setting; Every is three with the described venthole arranging on the prestress pipe 2 of venthole, and one is arranged on the interlude of horizontal segment pipeline 21, and two other is separately positioned in tilting section pipeline 23Shu Wan district 22; Connect on valve 5 and be circumscribed with escape pipe 3, on escape pipe 3, be labeled with the mark of corresponding different pipeline ventholes; As shown in Figure 6, the gas outlet setting position of escape pipe 3 and the vertical distance H of described venthole are the distance that 50cm or other are not less than 50cm.Certainly, in other embodiments, can also adopt the prestress pipe of other quantity, with venthole also can arrange as required.
The fish ridge tube bank of the present embodiment is particularly useful for greatly across footpath concrete fish ridge continuous girder bridge, and according to designing requirement and the construction speed of its fish ridge wall body, the adaptive fish ridge wall body that is embedded in can mate, adopt easily prestress pipe two ends to carry out mud jacking simultaneously.
More than describe preferred embodiment of the present invention in detail.Should be appreciated that those of ordinary skill in the art just can design according to the present invention make many modifications and variations without creative work.Therefore, all technician in the art, all should be in by the determined protection domain of claims under this invention's idea on the basis of existing technology by the available technical scheme of logical analysis, reasoning, or a limited experiment.
Claims (5)
1. poor, the overlength of a superelevation, super-tonnage prestress pipe grouting, in building mould across the fish ridge wall body on the concrete fish ridge continuous girder bridge of footpath greatly, lay prestress pipe, then carry out the concreting of fish ridge wall body, reach after design strength at described concrete, carry out prestressed stretch-draw, then carry out the grouting construction of prestress pipe; Described superelevation is poor, overlength, super-tonnage prestress pipe grouting comprise the following steps:
Preparation before step 1, grouting:
1.1, the prefabricated prestress pipe with venthole: comprise horizontal segment pipeline and the end tilting section pipeline with Shu Wan district, two described tilting section device for cleaning pipelines are crossed the mild conducting in described Shu Wan district and are connected in the two-port of described horizontal segment pipeline, and described venthole is arranged on described Shu Wan district and described horizontal segment pipeline;
1.2, while the described prestress pipe with venthole being deployed to described fish ridge wall body and building mould, on described venthole, each conducting connects an escape pipe, and escape pipe is extended to described fish ridge wall body builds outside mould;
Step 2, duct grouting: the two-port by the described prestress pipe with venthole is carried out mud jacking construction simultaneously, ducted air is discharged to outside by venthole by escape pipe, two-port continues mud jacking, the described escape pipe that occurs full pulp is carried out to shutoff, until all escape pipes all after shutoff, are stopped to mud jacking construction.
2. poor, the overlength of superelevation as claimed in claim 1, super-tonnage prestress pipe grouting, is characterized in that, the gas outlet setting position of described escape pipe and the vertical distance of described venthole are not less than 50cm.
3. poor, the overlength of superelevation as claimed in claim 1, super-tonnage prestress pipe grouting, it is characterized in that, at the interlude of described horizontal segment pipeline, a venthole is set, in the described Shu Wan district of two described tilting section pipelines, a venthole is respectively set.
4. poor, the overlength of the superelevation as described in claim 1 or 3, super-tonnage prestress pipe grouting, it is characterized in that, the described prestress pipe with venthole also comprises gas bushing, the described bobbin seal of giving vent to anger is set on described venthole pipeline of living in, describedly go out to be provided with connection valve in gas bushing, described connection valve and described venthole conducting, described escape pipe conducting is connected on described connection valve.
5. poor, the overlength of superelevation as claimed in claim 1, super-tonnage prestress pipe grouting, is characterized in that, is labeled with the mark of corresponding different pipeline ventholes on described escape pipe.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210414986.8A CN102877415B (en) | 2012-10-26 | 2012-10-26 | Ultra-high-difference, ultra-long and ultra-large-tonnage prestress pipeline grouting method and herring-bone pipe bundle |
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|---|---|---|---|
| CN201210414986.8A CN102877415B (en) | 2012-10-26 | 2012-10-26 | Ultra-high-difference, ultra-long and ultra-large-tonnage prestress pipeline grouting method and herring-bone pipe bundle |
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| CN102877415A CN102877415A (en) | 2013-01-16 |
| CN102877415B true CN102877415B (en) | 2014-07-09 |
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| CN103397601B (en) * | 2013-08-16 | 2016-06-15 | 中国一冶集团有限公司 | Get rid of the construction method of prestress box beam overlength steel strand tension fault |
| CN104652280B (en) * | 2014-12-23 | 2016-05-18 | 上海市城市建设设计研究总院 | Overlength, after water fish ridge wall one-time continuous moulding irrigation method and overlength fish ridge wall thereof |
| CN116905813A (en) * | 2023-07-17 | 2023-10-20 | 中冶检测认证有限公司 | Inverted U-shaped prestress steel beam pouring system and method for containment vessel of nuclear power station |
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Address after: 200011 Tibet South Road, Shanghai, No. 1170, No. Patentee after: Shanghai urban construction design & Research Institute (Group) Co., Ltd. Address before: No. 3447 Dongfang Road, Shanghai, Pudong New Area Patentee before: Shanghai Urban Construction Design & Research Institute |