CN112227725A - Grouting structure of long pore passage of prestressed concrete stiffening beam and construction method thereof - Google Patents
Grouting structure of long pore passage of prestressed concrete stiffening beam and construction method thereof Download PDFInfo
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- CN112227725A CN112227725A CN202011250499.3A CN202011250499A CN112227725A CN 112227725 A CN112227725 A CN 112227725A CN 202011250499 A CN202011250499 A CN 202011250499A CN 112227725 A CN112227725 A CN 112227725A
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- 239000011148 porous material Substances 0.000 title claims abstract description 26
- 239000011513 prestressed concrete Substances 0.000 title claims abstract description 18
- 238000010276 construction Methods 0.000 title claims abstract description 14
- 239000011440 grout Substances 0.000 claims abstract description 89
- 230000001502 supplementing effect Effects 0.000 claims abstract description 34
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 28
- 239000010959 steel Substances 0.000 claims abstract description 28
- 238000007599 discharging Methods 0.000 claims abstract description 19
- 239000004567 concrete Substances 0.000 claims abstract description 18
- 238000003825 pressing Methods 0.000 claims abstract description 14
- 239000002002 slurry Substances 0.000 claims description 43
- 238000000034 method Methods 0.000 claims description 12
- 230000008569 process Effects 0.000 claims description 9
- 229910001018 Cast iron Inorganic materials 0.000 claims description 3
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000006641 stabilisation Effects 0.000 claims description 3
- 238000011105 stabilization Methods 0.000 claims description 3
- 239000003351 stiffener Substances 0.000 claims description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000008520 organization Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 210000002435 tendon Anatomy 0.000 description 1
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Classifications
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- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G21/00—Preparing, conveying, or working-up building materials or building elements in situ; Other devices or measures for constructional work
- E04G21/02—Conveying or working-up concrete or similar masses able to be heaped or cast
- E04G21/04—Devices for both conveying and distributing
- E04G21/0418—Devices for both conveying and distributing with distribution hose
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
- E04C3/00—Structural elongated elements designed for load-supporting
- E04C3/02—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces
- E04C3/20—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members
- E04C3/26—Joists; Girders, trusses, or trusslike structures, e.g. prefabricated; Lintels; Transoms; Braces of concrete or other stone-like material, e.g. with reinforcements or tensioning members prestressed
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- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- On-Site Construction Work That Accompanies The Preparation And Application Of Concrete (AREA)
Abstract
The invention provides a grouting structure of a long pore passage of a prestressed concrete stiffening beam and a construction method thereof, wherein the grouting structure comprises a grout supplementing pipe, grout discharging pipes, grout stopping valves, transparent steel wire hoses, a four-way connector, a grout pressing device, a vacuumizing machine, an ultra-long prestressed pore passage and the concrete stiffening beam, the ultra-long prestressed pore passage is arranged in the concrete stiffening beam, grout pressing holes are respectively arranged at two ends of the ultra-long prestressed pore passage, the grout supplementing pipe is provided with the grout stopping valves, two interfaces of the four-way connector are respectively communicated with the two grout discharging pipes through the two transparent steel wire hoses, one interface of the other two interfaces of the four-way connector is communicated with the vacuumizing machine through the transparent steel wire hoses, the other interface of the four-way connector is communicated with the outside through the transparent steel wire hoses, and the four interfaces of the four-way connector are respectively provided with the grout stopping valves; the two grouting devices are respectively communicated with two ends of the ultra-long prestressed duct; the invention can ensure the compactness of the grouting.
Description
Technical Field
The invention relates to the technical field of engineering, in particular to a grouting structure of a long pore passage of a prestressed concrete stiffening beam and a construction method thereof.
Background
The pore canal grouting is one of the most important links in the post-tensioning prestressed concrete member, and the quality of the pore canal grouting directly influences the safety and durability of the bridge and the member in the using process. Because the prestressed duct is not in a horizontal state under many conditions, if the grouting of the duct is not compact or has defects, the prestressed steel bundles can be separated from the package of the grouting material, so that the prestressed tendons are corroded, and the bearing capacity and the service life of the bridge are greatly determined.
At present, the purpose of grouting of a prestressed corrugated pipeline within 50m can be achieved through a large-circulation grouting process, but how to ensure the compactness of grouting of an ultra-long corrugated pipeline still cannot be effectively ensured.
Disclosure of Invention
Aiming at the technical problems, the invention aims to provide a grouting structure of a long pore passage of a prestressed concrete stiffening beam and a construction method thereof, and in order to solve the technical problems, the invention adopts the following technical scheme to realize:
on one hand, the invention provides a grouting structure of a long pore channel of a prestressed concrete stiffening beam, which comprises a grout supplementing pipe, a grout discharging pipe, a grout stopping valve, a transparent steel wire hose, a four-way connector, a grouting device, a vacuumizing machine, an ultra-long prestressed pore channel and a concrete stiffening beam;
an overlong prestressed pore channel is arranged in the concrete stiffening beam, grouting holes are formed in two ends of the overlong prestressed pore channel, the upper ends of the grout supplementing pipe and the grout discharging pipe are communicated with the outside, the lower ends of the grout supplementing pipe and the grout discharging pipe are communicated with the overlong prestressed pore channel after penetrating through the concrete stiffening beam, and a grout stopping valve is arranged on the grout supplementing pipe;
the device comprises a plurality of slurry supplementing pipes, two slurry discharging pipes, a four-way connector, a vacuumizing machine and a vacuum pump, wherein two interfaces of the four-way connector are communicated with the two slurry discharging pipes through transparent steel wire hoses;
the two grouting devices are respectively communicated with two ends of the ultra-long prestressed duct;
the grouting device comprises a grouting connecting pipe, a rubber grouting pipe and a grouting machine, the grouting machine is communicated with one end of the rubber grouting pipe, the other end of the rubber grouting pipe is communicated with one end of the grouting connecting pipe, the other end of the grouting connecting pipe is communicated with the grouting hole in the ultra-long prestressed duct, and a grout stop valve is arranged on the grouting connecting pipe.
Advantageously, the grout supplementing pipes are arranged on the overlong prestressed duct at equal intervals.
Advantageously, the distance between adjacent slurry filling pipes is 30 m.
Advantageously, the exposed portion of the grout pipe is 20cm above the upper surface of the concrete stiffener.
Advantageously, the grout outlet pipe and the grout pipe are rigid PE pipes.
Advantageously, the grouting connecting pipe is a 25 phi cast iron pipe with the length of 20 cm.
Advantageously, the four-way connector is in the shape of a cross.
On the other hand, the invention provides a construction method of a grouting structure of a long pore passage of a prestressed concrete stiffening beam, which is characterized by comprising the following steps of:
the method comprises the following steps: before vacuumizing, closing all the grout stopping valves, opening the four grout stopping valves on the four-way connector during vacuumizing, then closing the grout stopping valves communicated with an external interface, and opening the vacuumizing machine for vacuumizing;
step two: when the vacuum pressure reaches a control value, simultaneously opening the two grouting machines and opening the grout stopping valve on the grouting connecting pipe for grouting;
step three: in the grouting process, the grout stop valves on the grout supplementing pipes are sequentially opened from two ends of the concrete stiffening beam to the midspan direction, the grouting condition is checked, and when grout flows out of the midspan grout supplementing pipes and reaches a certain transparent steel wire hose, the grout stop valves connected with the transparent steel wire hose connector are immediately closed;
step four: when slurry flows out of the two slurry discharge pipes and reaches the transparent steel wire hose, immediately closing the vacuum pump and the slurry stop valves on the corresponding interfaces of the vacuum pump and the four-way connector, opening the slurry stop valves on the other three interfaces of the four-way connector, and continuously and simultaneously pressing the two slurry pressing machines;
step five: after the slurry flowing out of the transparent steel wire hose communicated with the outside is continuous and has no bubbles, closing all the slurry stop valves, and closing the slurry pressing machine after the pressure stabilization is finished to finish the slurry pressing;
step six: and after the grout in the ultra-long prestressed duct is solidified, performing grout supplementing and pressing by using the grout supplementing pipe to ensure the grouting fullness of the ultra-long prestressed duct.
The invention has the following beneficial effects:
the opening and closing matching among the grout stopping valves is realized, the grout is supplemented through the grout supplementing pipes, the four-way connector is connected with the transparent steel wire hoses with different functions, the problems that the grouting of the ultra-long prestressed pore passage is not compact, the corrugated pipe is blocked due to the slurry leakage, the beam body is cracked and deformed and the like in the grouting process due to the overlong pore passage are solved, the construction environment is improved, the production efficiency is improved, the construction organization is convenient, the construction cost is greatly reduced, the safety in the grouting process of the ultra-long prestressed pore passage is high, the quality is easy to guarantee, the benefit is remarkable, and the effect is good.
Drawings
The invention is further illustrated by means of the attached drawings, but the embodiments in the drawings do not constitute any limitation to the invention, and for a person skilled in the art, other drawings can be obtained on the basis of the following drawings without inventive effort.
FIG. 1 is a schematic structural view of the present invention;
fig. 2 is an enlarged view of the invention at a in fig. 1.
Reference numerals: the grouting device comprises a grout supplementing pipe 1, a grout discharging pipe 2, a grout stopping valve 3, a transparent steel wire hose 4, a four-way connector 5, a grouting connecting pipe 6, a rubber grouting pipe 7, a grouting machine 8, a vacuumizing machine 9, a grouting hole 10, an ultra-long prestressed duct 11 and a concrete stiffening beam 12.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "vertical", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, "first," "second," "third," and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be further noted that, unless otherwise specifically stated or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, connected through an intermediate medium, or connected through the insides of two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Example one
As shown in fig. 1-2, a grouting structure for a long duct of a prestressed concrete stiffening beam comprises a grout supplementing pipe 1, a grout discharging pipe 2, a grout stopping valve 3, a transparent steel wire hose 4, a four-way connector 5, a grouting device, a vacuumizer 9, an ultra-long prestressed duct 11 and a concrete stiffening beam 12;
an ultralong prestressed duct 11 is arranged in the concrete stiffening beam 12, grouting holes 10 are respectively arranged at two ends of the ultralong prestressed duct 11, the upper ends of the grout supplementing pipe 1 and the grout discharging pipe 2 are communicated with the outside, the lower ends of the grout supplementing pipe 1 and the grout discharging pipe 2 are communicated with the ultralong prestressed duct 11 after penetrating through the concrete stiffening beam 12, and a grout stop valve 3 is arranged on the grout supplementing pipe 1;
the device comprises a plurality of slurry supplementing pipes 1, two slurry discharging pipes 2, a four-way connector 5, a vacuum pump 9 and a vacuum pump, wherein two interfaces of the four-way connector 5 are communicated with the two slurry discharging pipes 2 through transparent steel wire hoses 4;
the two grouting devices are respectively communicated with two ends of the ultra-long prestressed duct 11;
the grouting device comprises a grouting connecting pipe 6, a rubber grouting pipe 7 and a grouting machine 8, wherein the grouting machine 8 is communicated with one end of the rubber grouting pipe 7, the other end of the rubber grouting pipe 7 is communicated with one end of the grouting connecting pipe 6, the other end of the grouting connecting pipe 6 is communicated with a grouting hole 10 in the ultralong prestressed duct 11, and a grout stop valve 3 is arranged on the grouting connecting pipe 6.
The length of the ultra-long prestressed duct 11 is selected to be 461.58 m.
Preferably, the grout supplementing pipes 1 are arranged on the overlong prestressed duct 11 at equal intervals.
Preferably, the distance between adjacent slurry supplementing pipes 1 is 30 m.
Preferably, the exposed part of the grout pipe 1 is 20cm higher than the upper surface of the concrete stiffening beam 12.
Preferably, the slurry discharge pipe 2 and the slurry supplementing pipe 1 are hard PE pipes.
Preferably, the grouting connecting pipe 6 is a phi 25 cast iron pipe with the length of 20 cm.
Preferably, the four-way connector 5 is in the shape of a cross.
In this embodiment, the ultra-long prestressed duct 11 with a length greater than 50m can ensure the compactness of grouting during grouting.
Example two
A construction method of a grouting structure of a long pore passage of a prestressed concrete stiffening beam comprises the following steps:
the method comprises the following steps: before vacuumizing, closing all the grout stopping valves 3, opening the four grout stopping valves 3 on the four-way connector 5 during vacuumizing, then closing the grout stopping valves 3 communicated with an external interface, and opening the vacuumizing machine 9 for vacuumizing;
step two: when the vacuum pressure reaches a control value, simultaneously opening the two grouting machines 8 and opening the grout stopping valve 3 on the grouting connecting pipe 6 for grouting;
step three: in the grouting process, the grout stop valves 3 on the grout supplementing pipes 1 are sequentially opened from the two ends of the concrete stiffening beam 12 to the midspan direction, the grouting condition is checked, and when grout flows out of the midspan grout supplementing pipes 1 and reaches a certain transparent steel wire hose 4, the grout stop valves 3 connected to the connector of the transparent steel wire hose 4 are immediately closed;
step four: when slurry flows out from the two slurry discharge pipes 2 and reaches the transparent steel wire hose 4, immediately closing the vacuum pump 9 and the slurry stop valves 3 on the corresponding interfaces of the vacuum pump 9 and the four-way connector 5, opening the slurry stop valves 3 on the other three interfaces of the four-way connector, and continuously and simultaneously pressing two slurry pressing machines 8;
step five: after the slurry flowing out of the transparent steel wire hose 4 communicated with the outside is continuous and has no bubbles, closing all the slurry stop valves 3, and closing the slurry pressing machine 8 after the pressure stabilization is finished to finish the slurry pressing;
step six: and after the grout in the ultra-long prestressed duct 11 is solidified, performing grout supplementing by using the grout supplementing pipe 1 to ensure the grouting fullness of the ultra-long prestressed duct 11.
If the local section leaks pulp and the pulp is not full, the pulp supplementing pipe 1 can be used for supplementing and pressing pulp.
In the preferred embodiment, the opening and closing matching among the grout stop valves 3 is adopted, the grout is supplemented through the grout supplementing pipes 1, the four-way connector 5 is connected with the transparent steel wire hoses 4 with different functions, the problems that the grouting of the pore channel is not compact, the corrugated pipe leaks grout and is blocked, the beam body is cracked and deformed and the like due to overlong pore channels in the grouting process of the overlong prestressed pore channel 11 are solved, the construction environment is improved, the production efficiency is improved, the construction organization is convenient, the construction cost is greatly reduced, the safety and the quality in the grouting process of the overlong prestressed pore channel are easy to guarantee, the benefit is obvious, and the effect is good.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (8)
1. A grouting structure of a long pore channel of a prestressed concrete stiffening beam is characterized by comprising a grout supplementing pipe (1), a grout discharging pipe (2), a grout stopping valve (3), a transparent steel wire hose (4), a four-way connector (5), a grouting device, a vacuumizing machine (9), an ultra-long prestressed pore channel (11) and a concrete stiffening beam (12);
an ultra-long prestressed duct (11) is arranged in the concrete stiffening beam (12), grouting holes (10) are formed in two ends of the ultra-long prestressed duct (11), the upper ends of the grouting pipes (1) and the upper ends of the grout discharging pipes (2) are communicated with the outside, the lower ends of the grouting pipes (1) and the lower ends of the grout discharging pipes (2) are communicated with the ultra-long prestressed duct (11) after penetrating through the concrete stiffening beam (12), and a grout stopping valve (3) is arranged on the grouting pipes (1);
the device is characterized in that a plurality of slurry supplementing pipes (1) are arranged, two slurry discharging pipes (2) are arranged, two interfaces of the four-way connector (5) are communicated with the two slurry discharging pipes (2) through the transparent steel wire hose (4), one interface of the other two interfaces of the four-way connector (5) is communicated with the vacuumizing machine (9) through the transparent steel wire hose (4), the other interface of the four-way connector is communicated with the outside through the transparent steel wire hose (4), and slurry stopping valves (3) are arranged on the four interfaces of the four-way connector (5);
the two grouting devices are respectively communicated with two ends of the ultra-long prestressed duct (11);
the grouting device comprises a grouting connecting pipe (6), a rubber grouting pipe (7) and a grouting machine (8), wherein the grouting machine (8) is communicated with one end of the rubber grouting pipe (7), the other end of the rubber grouting pipe (7) is communicated with one end of the grouting connecting pipe (6), the other end of the grouting connecting pipe (6) is communicated with the grouting hole (10) in the ultra-long prestressed duct (11), and a grout stop valve (3) is arranged on the grouting connecting pipe (6).
2. The grouting structure of a long duct of a prestressed concrete stiffening beam according to claim 1, wherein the grout-filling pipes (1) are arranged on the ultra-long prestressed duct (11) at equal intervals.
3. The grouting structure for a long duct of a prestressed concrete stiffener according to claim 2, wherein the interval between adjacent grout pipes (1) is 30 m.
4. The grouting structure for a long duct of a prestressed concrete stiffening beam according to claim 3, wherein the exposed part of the grout-filling pipe (1) is 20cm higher than the upper surface of the concrete stiffening beam (12).
5. The grouting structure for a long duct of a prestressed concrete stiffening beam according to claim 4, wherein the grout discharging pipe (2) and the grout supplementing pipe (1) are hard PE pipes.
6. The grouting structure for a long tunnel of a prestressed concrete stiffening beam according to claim 5, wherein said grouting connection pipe (6) is a phi 25 cast iron pipe having a length of 20 cm.
7. The grouting structure for a long tunnel of a prestressed concrete stiffening girder according to claim 6, wherein said four-way connector (5) has a cross shape.
8. A construction method of a grouting structure using the long tunnel of a prestressed concrete stiffener according to any one of claims 1 to 7, comprising the steps of:
the method comprises the following steps: before vacuumizing, closing all the grout stopping valves (3), opening the four grout stopping valves (3) on the four-way connector (5) during vacuumizing, then closing the grout stopping valves (3) communicated with an external interface, and opening the vacuumizing machine (9) for vacuumizing;
step two: when the vacuum pressure reaches a control value, simultaneously opening the two grouting machines (8) and opening the grout stopping valve (3) on the grouting connecting pipe (6) for grouting;
step three: in the grouting process, the grout stop valves (3) on the grout supplementing pipes (1) are sequentially opened from the two ends of the concrete stiffening beam (12) to the midspan direction, the grouting condition is checked, and when grout flows out of the midspan grout supplementing pipes (1) and reaches a certain transparent steel wire hose (4), the grout stop valves (3) connected with the connector of the transparent steel wire hose (4) are immediately closed;
step four: when slurry flows out of the two slurry discharge pipes (2) and reaches the transparent steel wire hose (4), the vacuum pump (9) and the slurry stop valves (3) on the corresponding interfaces of the vacuum pump (9) and the four-way connector (5) are immediately closed, the slurry stop valves (3) on the other three interfaces of the four-way connector are opened, and two slurry presses (8) continue to simultaneously press slurry;
step five: after the slurry flowing out of the transparent steel wire hose (4) communicated with the outside is continuous and has no bubbles, closing all the slurry stop valves (3), and closing the slurry press (8) after the pressure stabilization is finished to finish the slurry pressing;
step six: and after the grout in the ultra-long prestressed duct (11) is solidified, performing grout-supplementing pressing by using the grout-supplementing pipe (1) to ensure the grouting fullness of the ultra-long prestressed duct (11).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011250499.3A CN112227725B (en) | 2020-11-11 | 2020-11-11 | Grouting structure of long pore canal of prestressed concrete stiffening girder and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011250499.3A CN112227725B (en) | 2020-11-11 | 2020-11-11 | Grouting structure of long pore canal of prestressed concrete stiffening girder and construction method thereof |
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| Publication Number | Publication Date |
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| CN112227725A true CN112227725A (en) | 2021-01-15 |
| CN112227725B CN112227725B (en) | 2024-06-18 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112983006A (en) * | 2021-01-25 | 2021-06-18 | 侯金林 | Vacuum grouting device for fabricated building structure and construction method thereof |
| CN114164774A (en) * | 2021-11-19 | 2022-03-11 | 中铁二十一局集团第四工程有限公司 | Pore channel pulp supplementing process for improving pore channel compactness of prefabricated box girder |
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