CN114164774B - Channel pulp supplementing process for improving compactness of prefabricated box girder channel - Google Patents
Channel pulp supplementing process for improving compactness of prefabricated box girder channel Download PDFInfo
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- CN114164774B CN114164774B CN202111400084.4A CN202111400084A CN114164774B CN 114164774 B CN114164774 B CN 114164774B CN 202111400084 A CN202111400084 A CN 202111400084A CN 114164774 B CN114164774 B CN 114164774B
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- slurry
- grouting
- box girder
- ball valve
- channel
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 230000008569 process Effects 0.000 title claims abstract description 23
- 230000001502 supplementing effect Effects 0.000 title claims abstract description 19
- 239000002002 slurry Substances 0.000 claims abstract description 106
- 239000011148 porous material Substances 0.000 claims abstract description 22
- 238000003825 pressing Methods 0.000 claims abstract description 19
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 10
- 239000010959 steel Substances 0.000 claims abstract description 10
- 238000002156 mixing Methods 0.000 claims description 7
- 230000008439 repair process Effects 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 3
- 238000001514 detection method Methods 0.000 abstract description 6
- 238000009435 building construction Methods 0.000 abstract description 2
- 238000011156 evaluation Methods 0.000 abstract description 2
- 230000007246 mechanism Effects 0.000 abstract description 2
- 239000011150 reinforced concrete Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000011065 in-situ storage Methods 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005429 filling process Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D22/00—Methods or apparatus for repairing or strengthening existing bridges ; Methods or apparatus for dismantling bridges
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2/00—Bridges characterised by the cross-section of their bearing spanning structure
- E01D2/04—Bridges characterised by the cross-section of their bearing spanning structure of the box-girder type
-
- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01D—CONSTRUCTION OF BRIDGES, ELEVATED ROADWAYS OR VIADUCTS; ASSEMBLY OF BRIDGES
- E01D2101/00—Material constitution of bridges
- E01D2101/20—Concrete, stone or stone-like material
- E01D2101/24—Concrete
- E01D2101/26—Concrete reinforced
- E01D2101/28—Concrete reinforced prestressed
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Bridges Or Land Bridges (AREA)
Abstract
The invention relates to the technical field of building construction, in particular to a duct grouting process for improving the compactness of a prefabricated box girder duct. The slurry supplementing process comprises the following steps: step one: before the girder body of the precast box girder adopts large-cycle grouting, the anchor head is closed, and the steel strand is not closed; step two: performing large-cycle grouting, and standing for 4 hours; step three: preparing slurry according to the proportion, and pouring the slurry into a slurry pressing tool; step four: connecting a slurry outlet hose to a pore canal grouting port, and waiting for grouting; step five: an air outlet hose of the air compressor is connected into the tank body, and the air compressor is started; step six: slowly pressing the slurry into the pore canal until the slurry fills the pore canal; step seven: closing the pressure ball valve. The invention provides a channel pulp supplementing process for improving the channel compactness of a precast box girder, which can continuously and stably feed secondary pulp supplementing, has good channel compactness through the field detection of a third-party test detection mechanism, can reach the evaluation standard of a channel compact chamber, and effectively controls and prevents the phenomena of non-compact channels and hollowness.
Description
Technical Field
The invention relates to the technical field of building construction, in particular to a duct grouting process for improving the compactness of a prefabricated box girder duct.
Background
The box girder of the reinforced concrete structure is divided into a prefabricated box girder and a cast-in-situ box girder, and the box girder combined bridge girder erection machine prefabricated in an independent place can be erected after the lower engineering is completed, so that the engineering progress can be accelerated, and the construction period can be saved; the cast-in-situ box girder is mainly used for large continuous bridges and is mainly divided into two types of materials, namely a prestressed reinforced concrete box girder and a steel box girder, wherein the prestressed reinforced concrete box girder is in site construction, and is provided with transverse prestressing in addition to longitudinal prestressing, the steel box girder is generally processed in a factory and then transported to site for installation, an all-steel structure is provided, and a reinforced concrete paving layer is also provided, wherein the steel box girder, also called a steel plate box girder, is a common structural form of a large-span bridge, is generally used for bridges with larger spans, is shaped like a box, is called a steel box girder, and when the traditional precast box girder is used, the phenomenon of incompact and hollowness with different degrees exists in the range of 1m of the end part of the precast box girder in the detection process of a third party pore canal, so that the box girder is easy to cause the service life of the box girder to be short, the bearable load of the box girder is low, and various unpredictable hazards occur.
Disclosure of Invention
The invention provides a channel pulp supplementing process for improving the channel compactness of a precast box girder, which can continuously and stably feed secondary pulp supplementing, has good channel compactness through the field detection of a third-party test detection mechanism, can reach the evaluation standard of a channel compact chamber, and effectively controls and prevents the phenomena of non-compact channels and hollowness.
The technical scheme adopted by the invention is a pore canal slurry supplementing process for improving the compactness of a prefabricated box girder pore canal, which is characterized in that: the slurry supplementing process comprises the following steps:
step one: before the girder body of the precast box girder adopts large-cycle grouting, the anchor head is closed, and the steel strand is not closed;
step two: performing large-cycle grouting, standing for 4 hours, and waiting for the slurry to coagulate;
step three: when waiting for the slurry to coagulate, preparing the slurry according to the proportion, opening a slurry inlet of a slurry pressing tool, pouring the slurry into the slurry pressing tool, and closing the slurry inlet after pouring is finished;
step four: after the slurry is coagulated, performing secondary slurry supplementing immediately, connecting a slurry outlet hose of a slurry pressing tool to a slurry pressing port of a pore canal, opening a slurry outlet ball valve, and waiting for slurry pressing;
step five: an air outlet hose of the air compressor is connected with a tank pressure ball valve, the air compressor is started, and the reading of a pressure gauge is maintained to be between 0.5 and 0.8 Mpa;
step six: slowly opening the pressure ball valve, observing the grouting speed and pressure, and adjusting the opening degree of the ball valve according to the observation result so as to slowly and uniformly press the slurry into the pore canal until the slurry is fully pressed into the pore canal;
step seven: closing the pressure ball valve and starting the next slurry supplementing operation.
The grouting tool comprises an air compressor, an air outlet hose is arranged on one side of an outlet of the air compressor, and a grouting tank is arranged on one side of the air outlet hose.
The grouting device is characterized in that a handle ring is arranged above the grouting tank, a Y-shaped pipeline is arranged on the grouting tank and located in the handle ring, a ball valve I is arranged at one end of the Y-shaped pipeline, and a ball valve II is arranged at the other end of the Y-shaped pipeline.
The grouting device is characterized in that a slurry outlet is formed in one side below the grouting tank, a slurry feeding pipeline is arranged on the slurry outlet, and a slurry stopping valve is arranged at one end of the slurry feeding pipeline.
One side of the ball valve I is connected with an air outlet hose, one side of the ball valve II is provided with a slurry inlet pipeline, and one end of the slurry inlet pipeline is provided with a mixing container.
The mixing container is internally provided with slurry pressing material.
And a duct is arranged in the prefabricated box girder, and a plurality of small holes are formed in the duct.
The invention has the beneficial effects that:
the invention provides a channel repair process for improving the compactness of a prefabricated box girder channel, which has the advantages that the pressure pushing is gentle, the phenomena of slurry impact retraction and insufficient exhaust are not caused, the slurry repair state is a condensation state, the compressed air at the upper part in a tank is not mixed with slurry, the slurry is hardly mixed with air, the air hole and the bubble phenomenon are not generated in the condensed slurry, the process equipment is small and simple, the site operation is convenient, the secondary slurry repair can be carried out on the channel, the high-pressure grouting and the high-pressure glue injection treatment can be carried out on the channel expansion of the girder, and the high-pressure glue injection sealing treatment can be carried out on the cracks of structures such as a dangerous old bridge.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a grouting tool of the channel grouting process for improving the compactness of the channels of a precast box girder;
FIG. 2 is a schematic diagram of a grouting tank structure of a grouting tool of the duct grouting process for improving the compactness of the duct of the precast box girder;
fig. 3 is a schematic diagram of a box girder channel of a channel slurry filling process for improving the compactness of a prefabricated box Liang Kongdao.
( 1. An air compressor; 2. an air outlet hose; 3. a grouting tank; 4. a handle ring; 5. y-shaped pipelines; 6. a ball valve I; 7. a ball valve II; 8. a slurry outlet; 9. a slurry feeding pipeline; 10. a slurry stop valve; 11. a slurry inlet pipeline; 12. mixing container )
Detailed Description
The invention is further described below with reference to the accompanying drawings.
In order to solve the problems that when the existing prefabricated box girder is used, in the detection process of 'knocking echo' of a third-party duct, the phenomena of incompact and hollowness with different degrees exist in the range of 1m of the end part of the prefabricated box girder, the prefabricated box girder is directly used, the service life of the box girder is easy to be caused, the bearable load of the box girder is low, various unpredictable hazards occur and the like.
The invention provides a pore canal slurry supplementing process for improving the compactness of a pore canal of a prefabricated box girder, which is characterized by comprising the following steps of: the slurry supplementing process comprises the following steps:
step one: before the girder body of the precast box girder adopts large-cycle grouting, the anchor head is closed, and the steel strand is not closed;
step two: performing large-cycle grouting, standing for 4 hours, and waiting for the slurry to coagulate;
step three: when waiting for the slurry to coagulate, preparing the slurry according to the proportion, opening a slurry inlet of a slurry pressing tool, pouring the slurry into the slurry pressing tool, and closing the slurry inlet after pouring is finished;
step four: after the slurry is coagulated, performing secondary slurry supplementing immediately, connecting a slurry outlet hose of a slurry pressing tool to a slurry pressing port of a pore canal, opening a slurry outlet ball valve, and waiting for slurry pressing;
step five: an air outlet hose of the air compressor is connected with a tank pressure ball valve, the air compressor is started, and the reading of a pressure gauge is maintained to be between 0.5 and 0.8 Mpa;
step six: slowly opening the pressure ball valve, observing the grouting speed and pressure, and adjusting the opening degree of the ball valve according to the observation result so as to slowly and uniformly press the slurry into the pore canal until the slurry is fully pressed into the pore canal;
step seven: closing the pressure ball valve and starting the next slurry supplementing operation.
The grouting tool comprises an air compressor 1, an air outlet hose 2 is arranged on one side of an outlet of the air compressor 1, and a grouting tank 3 is arranged on one side of the air outlet hose 2.
The grouting device is characterized in that a handle ring 4 is arranged above the grouting tank 3, a Y-shaped pipeline 5 is arranged on the grouting tank 3 and positioned in the handle ring 4, a ball valve I6 is arranged at one end of the Y-shaped pipeline 5, and a ball valve II 7 is arranged at the other end of the Y-shaped pipeline 5.
A slurry outlet 8 is arranged on one side below the grouting tank 3, a slurry feeding pipeline 9 is arranged on the slurry outlet 8, and a slurry stopping valve 10 is arranged at one end of the slurry feeding pipeline 9.
One side of the ball valve I6 is connected with the air outlet hose 2, one side of the ball valve II 7 is provided with a slurry inlet pipeline 11, and one end of the slurry inlet pipeline 11 is provided with a mixing container 12.
The mixing vessel 12 is provided with a slurry under pressure.
And a duct is arranged in the prefabricated box girder, and a plurality of small holes are formed in the duct.
The pressure pushing of the pore canal grouting process for improving the compactness of the pore canal of the precast box girder is mild, the phenomena of impact retraction and insufficient exhaust of the slurry are avoided, the grouting state is a condensation state, the compressed air at the upper part in the tank is not mixed with the slurry, the slurry is hardly mixed with air, the air holes and bubbles are not generated in the condensed slurry, the process equipment is small and simple, the site operation is convenient, the process and the small static grouting equipment can perform secondary grouting on the pore canal, and simultaneously, the high-pressure grouting and high-pressure grouting treatment and the high-pressure grouting sealing treatment on cracks of structures such as dangerous old bridges can be performed.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A pore canal slurry supplementing process for improving the compactness of a pore canal of a precast box girder is characterized by comprising the following steps of: the slurry supplementing process comprises the following steps:
step one: before the girder body of the precast box girder adopts large-cycle grouting, the anchor head is closed, and the steel strand is not closed;
step two: performing large-cycle grouting, standing for 4 hours, and waiting for the slurry to coagulate;
step three: when waiting for the slurry to coagulate, preparing the slurry according to the proportion, opening a slurry inlet of a slurry pressing tool, pouring the slurry into the slurry pressing tool, and closing the slurry inlet after pouring is finished;
step four: after the slurry is coagulated, performing secondary slurry supplementing immediately, connecting a slurry outlet hose of a slurry pressing tool to a slurry pressing port of a pore canal, opening a slurry outlet ball valve, and waiting for slurry pressing;
step five: an air outlet hose of the air compressor is connected with a tank pressure ball valve, the air compressor is started, and the reading of a pressure gauge is maintained to be between 0.5 and 0.8 Mpa;
step six: slowly opening the pressure ball valve, observing the grouting speed and pressure, and adjusting the opening degree of the ball valve according to the observation result so as to slowly and uniformly press the slurry into the pore canal until the slurry is fully pressed into the pore canal;
step seven: closing the pressure ball valve and starting the next slurry supplementing operation.
2. The duct grouting process for improving the compactness of the duct of the prefabricated box girder according to claim 1, wherein the process is characterized by comprising the following steps of: and a duct is arranged in the prefabricated box girder, and a plurality of small holes are formed in the duct.
3. A grouting tool for a duct repair process for improving the compactness of a prefabricated box girder duct according to claim 1 or 2, wherein: the grouting tool comprises an air compressor (1), an air outlet hose (2) is arranged on one side of an outlet of the air compressor (1), and a grouting tank (3) is arranged on one side of the air outlet hose (2).
4. A grouting tool as claimed in claim 3, wherein: the grouting device is characterized in that a handle ring (4) is arranged above the grouting tank (3), a Y-shaped pipeline (5) is arranged on the grouting tank (3) and located in the handle ring (4), a ball valve I (6) is arranged at one end of the Y-shaped pipeline (5), and a ball valve II (7) is arranged at the other end of the Y-shaped pipeline (5).
5. A grouting tool as claimed in claim 4, wherein: the grouting device is characterized in that a slurry outlet (8) is formed in one side below the grouting tank (3), a slurry feeding pipeline (9) is arranged on the slurry outlet (8), and a slurry stopping valve (10) is arranged at one end of the slurry feeding pipeline (9).
6. A grouting tool as claimed in claim 4, wherein: one side of the ball valve I (6) is connected with the air outlet hose (2), one side of the ball valve II (7) is provided with a slurry inlet pipeline (11), and one end of the slurry inlet pipeline (11) is provided with a mixing container (12).
7. A grouting tool as claimed in claim 6, wherein: the mixing container (12) is internally provided with slurry pressing material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111400084.4A CN114164774B (en) | 2021-11-19 | 2021-11-19 | Channel pulp supplementing process for improving compactness of prefabricated box girder channel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111400084.4A CN114164774B (en) | 2021-11-19 | 2021-11-19 | Channel pulp supplementing process for improving compactness of prefabricated box girder channel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN114164774A CN114164774A (en) | 2022-03-11 |
| CN114164774B true CN114164774B (en) | 2023-11-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111400084.4A Active CN114164774B (en) | 2021-11-19 | 2021-11-19 | Channel pulp supplementing process for improving compactness of prefabricated box girder channel |
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| CN (1) | CN114164774B (en) |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102145129B1 (en) * | 2019-09-17 | 2020-08-14 | 주식회사 후레씨네코리아 | Method for repairing grout of tendon tube of post-tensioned structures |
| CN111733707A (en) * | 2020-07-31 | 2020-10-02 | 陈宇豪 | Bridge prestressed duct grouting device and construction method |
| CN112227725A (en) * | 2020-11-11 | 2021-01-15 | 中交第四公路工程局有限公司 | Grouting structure of long pore passage of prestressed concrete stiffening beam and construction method thereof |
-
2021
- 2021-11-19 CN CN202111400084.4A patent/CN114164774B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102145129B1 (en) * | 2019-09-17 | 2020-08-14 | 주식회사 후레씨네코리아 | Method for repairing grout of tendon tube of post-tensioned structures |
| CN111733707A (en) * | 2020-07-31 | 2020-10-02 | 陈宇豪 | Bridge prestressed duct grouting device and construction method |
| CN112227725A (en) * | 2020-11-11 | 2021-01-15 | 中交第四公路工程局有限公司 | Grouting structure of long pore passage of prestressed concrete stiffening beam and construction method thereof |
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| Publication number | Publication date |
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| CN114164774A (en) | 2022-03-11 |
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