CN117328462A - High-water-head immersed tube tunnel repeatable grouting device and construction method - Google Patents
High-water-head immersed tube tunnel repeatable grouting device and construction method Download PDFInfo
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- CN117328462A CN117328462A CN202311177043.2A CN202311177043A CN117328462A CN 117328462 A CN117328462 A CN 117328462A CN 202311177043 A CN202311177043 A CN 202311177043A CN 117328462 A CN117328462 A CN 117328462A
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- grouting
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- 238000010276 construction Methods 0.000 title claims abstract description 41
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 23
- 239000005662 Paraffin oil Substances 0.000 claims abstract description 17
- 238000000034 method Methods 0.000 claims abstract description 10
- 229910000831 Steel Inorganic materials 0.000 claims description 84
- 239000010959 steel Substances 0.000 claims description 84
- 239000002002 slurry Substances 0.000 claims description 35
- 238000010008 shearing Methods 0.000 claims description 19
- 238000001125 extrusion Methods 0.000 claims description 12
- 238000004062 sedimentation Methods 0.000 claims description 12
- 239000004568 cement Substances 0.000 claims description 8
- 230000008878 coupling Effects 0.000 claims description 8
- 238000010168 coupling process Methods 0.000 claims description 8
- 238000005859 coupling reaction Methods 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 8
- 239000004698 Polyethylene Substances 0.000 claims description 7
- 201000010099 disease Diseases 0.000 claims description 7
- 208000037265 diseases, disorders, signs and symptoms Diseases 0.000 claims description 7
- -1 polyethylene Polymers 0.000 claims description 7
- 229920000573 polyethylene Polymers 0.000 claims description 7
- 238000004140 cleaning Methods 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 239000000463 material Substances 0.000 claims description 4
- 238000011065 in-situ storage Methods 0.000 claims description 3
- 239000011150 reinforced concrete Substances 0.000 claims description 3
- 238000007788 roughening Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims description 3
- 239000011800 void material Substances 0.000 claims description 3
- 206010040844 Skin exfoliation Diseases 0.000 claims description 2
- 230000035618 desquamation Effects 0.000 claims description 2
- 238000009417 prefabrication Methods 0.000 claims 2
- 238000004064 recycling Methods 0.000 claims 1
- 238000007569 slipcasting Methods 0.000 claims 1
- 239000007788 liquid Substances 0.000 abstract description 5
- 238000000576 coating method Methods 0.000 description 4
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 3
- 239000011248 coating agent Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 239000011701 zinc Substances 0.000 description 3
- 229910052725 zinc Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004567 concrete Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/02—Handling of bulk concrete specially for foundation or hydraulic engineering purposes
- E02D15/06—Placing concrete under water
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/063—Tunnels submerged into, or built in, open water
- E02D29/073—Tunnels or shuttering therefor assembled from sections individually sunk onto, or laid on, the water-bed, e.g. in a preformed trench
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to the technical field of immersed tube tunnels, in particular to a repeatable grouting device and a construction method for a high-water head immersed tube tunnel. Related devices are pre-embedded in advance when the immersed tube joint is prefabricated, so that damage to a structural main body caused by an opening in a tube at the later stage is avoided; grouting construction is carried out by using the middle gallery holes, so that traffic space is not occupied, and no influence is caused on traffic; the embedded pipeline is internally provided with a rear non-return device, and inert liquid such as paraffin oil is injected, so that the embedded pipeline can be reused; the method is suitable for the high-head underwater immersed tunnel, and widens the use conditions.
Description
Technical Field
The invention relates to the technical field of immersed tube tunnels, in particular to a repeatable grouting device for a high-head immersed tube tunnel and a construction method.
Background
The immersed tube tunnel foundation is generally implemented after a river bed or a seabed is excavated at a tunnel site, and because underwater operation is adopted, the foundation construction effect is poor compared with land construction quality, particularly, the foundation of a post-laying method is implemented after a pipe joint is settled, the foundation construction effect cannot be directly detected, the large uneven settlement risk exists at the later stage of the immersed tube tunnel, no effective measures for treating uneven settlement of the immersed tube tunnel are available except for strengthening the foundation construction quality control, and particularly, a treatment device capable of being repeatedly used by high water pressure is not available.
However, considering that the conventional grouting scheme is used, the pipe joint is easy to damage, the construction difficulty is high, the risk is high, and the method of pre-burying the grouting device in advance in the construction stage is designed to prevent and treat the uneven settlement disease of the pipe joint.
Disclosure of Invention
The invention aims to solve the defects of easy damage to a pipe joint and high construction difficulty in the prior art, and provides a repeatable grouting device for a high-head immersed tube tunnel and a construction method.
In order to achieve the above purpose, the present invention adopts the following technical scheme: the utility model provides a high water head immersed tube tunnel repeatable grouting device and construction method, the device specifically constructs the constitution and makes up:
flange, pre-buried steel pipe, paraffin oil, check valve and grid apron, wherein, pre-buried steel pipe is pre-buried at side wall and intermediate wall etc. when the tube coupling is prefabricated, and the tube coupling subsides and takes place in tube coupling joint department more, so follow tube coupling joint department and vertically arrange a row every interval 3m along the tube coupling, every 3 rows of each side.
The method comprises the steps that a steel plate at the bottom of a pipe joint is perforated at a design position of the pre-buried steel pipe and is welded with a grid cover plate, a spring is arranged on the grid cover plate, the spring is made of stainless steel, the upper end of the spring is connected with a water stop valve, the spring, the water stop valve and an enlarged section of the pre-buried steel pipe are combined to form a check valve, the pre-buried steel pipe, the check valve and the grid cover plate are connected with the steel plate at the bottom of the pipe joint through welding seams to form a whole, and cold zinc coating is coated at the joint of the welding seams;
inert liquid such as paraffin oil is injected into the embedded steel pipe, so that an anaerobic environment in the pipe is maintained, paraffin oil can be injected again after the differential settlement treatment is finished, and repeated use is realized.
Further, in the grouting device, the top of the embedded steel pipe is provided with a flange, the surface of the embedded steel pipe is provided with a water stop steel plate, and paraffin oil is poured into the embedded steel pipe;
the embedded steel pipe is welded with the steel bars in the pipe joint bottom plate, a circle of steel bar cages are arranged on the periphery of the embedded steel pipe, and cold zinc plating coatings are coated at the joints of the embedded steel pipe, the steel bars and the steel bar cages;
a grid type cover plate is arranged at the grouting hole of the steel plate at the bottom of the pipe joint, a stainless steel spring is arranged on the grid type cover plate, and the spring is connected with a water stop valve;
the check valve is composed of the spring, the water stop valve and the embedded steel pipe expansion section, the check valve and the grid cover plate are connected into a whole by welding, and a cold zinc coating is coated at the welding seam.
The invention also provides a repeatable grouting device for the high-head immersed tube tunnel and a construction method thereof, wherein the construction method comprises three parts, namely early working, grouting construction and shear key repair, and comprises the following construction steps:
first part, working in the early stage:
step one, pre-burying the uneven sedimentation treatment device when a pipe joint is prefabricated, and filling paraffin oil into a pipeline;
when uneven settlement disease occurs on the pipe joint, scanning the basic state of the uneven settlement pipe joint by adopting a nondestructive detection means, and primarily judging the void and loose positions and degrees of the tunnel foundation;
step three, detecting and evaluating the conditions of vertical and horizontal shearing keys at the joint of the pipe joint, and judging the sedimentation conditions of the pipe joints at two sides according to the extrusion or the descension of the middle and lower vertical shearing keys;
the horizontal shearing key is extruded and destroyed by the plate rubber support, the polyethylene filling material and the like in the sedimentation process, and needs to be chiseled away firstly, meanwhile, the water stop condition of the pipe joint connector is judged to prevent water seepage, and the pipe joint grouting is repaired after lifting.
And fourthly, according to the detection and analysis results of the second step and the third step, a targeted pipe joint grouting scheme and a shear key repairing scheme are formulated.
The second part, grouting construction scheme:
step five, using the middle corridor space as a construction site, and maximally reducing the influence of construction on traffic;
step six, installing grouting equipment, installing a control valve from the flange plate at the top of the embedded steel pipe, and arranging a blowout preventer behind the valve, wherein the blowout preventer is connected with a slurry mixer through an external pipeline, a pressure gauge is arranged on the mixer, and the mixer is connected with a slurry pump through a pipeline;
step seven, connecting grouting pipelines among devices to realize multi-hole synchronous grouting; preparing single-liquid slurry or double-liquid slurry formed by mixing cement slurry and other slurries;
step eight, determining grouting pressure according to the soil covering, the water depth and the structural self weight, paying attention to the grouting pressure during grouting, avoiding the pressure exceeding an allowable value, compressing a spring in a check valve under the action of the grouting pressure in the grouting process, opening a water stopping valve, and injecting grout into a immersed tube foundation after passing through the valve and a grid cover plate;
and step nine, after grouting is completed, refilling paraffin oil into the embedded steel pipe, and repeating the grouting step when the uneven sedimentation disease appears next time, so that repeated use is realized.
Third part, shear bond repair:
tenth, after grouting achieves the expected lifting effect, recovering in situ to fall off and damage the steel shear key bolts caused by sedimentation;
repairing the cracks in the range of the reinforced concrete shearing bond and the pipe joint damaged by extrusion.
And step eleven, cleaning the rubber support which is damaged by extrusion between the vertical shearing keys, and replacing the rubber support with a steel backing plate with proper size for preventing the extrusion damage again.
And twelve, cleaning the horizontal shearing key of the pipe joint, roughening the original shearing key, and then re-paving the cover plate, pouring the horizontal shearing key, mounting the plate-type rubber support and filling polyethylene.
In summary, the beneficial effects of the invention are as follows:
according to the invention, related devices are pre-embedded in advance when the immersed tube joint is prefabricated, so that damage to the structural main body caused by the open holes in the tube at the later stage is avoided; grouting construction is carried out by using the middle gallery holes, so that traffic space is not occupied, and the influence on traffic is very small; the embedded pipeline is internally provided with a rear non-return device, and inert liquid such as paraffin oil is injected, so that the embedded pipeline can be reused; the shearing key repair enhances the shearing resistance of the pipe joint and prolongs the service life of the tunnel.
Drawings
FIG. 1 is a schematic diagram of the cross-sectional layout of a high head immersed tube tunnel repeatable grouting device and a construction method of the invention;
FIG. 2 is a schematic plan layout of the pre-buried grouting device of the present invention;
FIG. 3 is a schematic diagram of a pre-buried grouting device according to the present invention;
FIG. 4 is a schematic view of the check valve structure of the present invention;
FIG. 5 is a schematic view of a grid deck of the present invention;
FIG. 6 is a schematic cross-sectional view of the differential settlement processing construction equipment of the present invention;
FIG. 7 is a schematic view of a vertical section of a non-uniform settlement treatment construction equipment A-A according to the present invention;
FIG. 8 is a schematic view of a pipe section vertical shear key;
FIG. 9 is a schematic plan view of a horizontal shear key;
FIG. 10 is a schematic cross-sectional view of a horizontal shear key;
in the figure: 1. embedding a steel pipe; 2. a pipe joint bottom plate; 3. a steel plate at the bottom of the pipe joint; 4. a flange plate; 5. a water-stopping steel plate; 6. a check valve; 7. a spring; 8. a grille cover plate; 9. a bottom plate reinforcing steel bar; 10. a reinforcement cage; 11. welding seams; 12. embedding an enlarged section of the steel pipe; 13. paraffin oil; 14. a control valve; 15. blowout preventer; 16. a mixer; 17. a pressure gauge; 18. a cement slurry pump; 19. other slurry pumps; 20. grouting pipelines; 21. grouting slurry; 22. a pipe joint connector; 23. a cutting key is arranged on the upper part; 24. a rubber support body; 25. a middle shear bond; 26. a lower shear key; 27. a plate-type rubber support; 28. polyethylene; 29. horizontal shear keys; 30. and a cover plate body.
Detailed Description
Referring to fig. 1, the invention provides a repeatable grouting device for a high-head immersed tube tunnel and a construction method thereof, as shown in fig. 1, wherein the repeatable grouting device is provided with an embedded steel tube 1, the embedded steel tube 1 is embedded in a tube section bottom plate 2, the embedded steel tube 1 is longitudinally arranged at intervals of 3m along a tube section from a tube section joint 22, 3 rows of embedded steel tubes are arranged at each side (as shown in fig. 2), the bottom plate of the tube section bottom plate 2 is provided with a tube section bottom steel plate 3, and the tube section bottom steel plate 3 is welded with the embedded steel tube 1; as shown in fig. 3, the pre-buried steel pipe 1 is a seamless steel pipe, a flange 4 is arranged at the port of the pre-buried steel pipe 1, a hole opening is temporarily plugged by cloth when the pre-buried steel pipe 1 is installed, and paraffin oil 13 is poured into the pre-buried steel pipe 1; as shown in fig. 4, the tail end of the embedded steel pipe 1 is provided with an embedded steel pipe expansion section 12, the embedded steel pipe expansion section 12 is welded with a steel bar 9 of an inner bottom plate of the steel plate 3 at the bottom of the pipe joint, the periphery of the embedded steel pipe expansion section 12 is provided with a circle of steel bar cage 10, a contact part between the three is coated with a cold galvanizing coating, a grid cover plate 8 (shown in fig. 5) is arranged at a port of the embedded steel pipe expansion section, the grid cover plate 8 is connected with the steel plate 3 at the bottom of the pipe joint and the embedded steel pipe expansion section 12 by adopting a welding seam 11, a water stop valve 6 and a spring 7 are arranged in the embedded steel pipe expansion section 12, the water stop valve 6 and the spring 7 are combined to form a check valve structure, the spring 7 is made of stainless steel materials, and the grid cover plate 8 is used as a supporting base of the spring 7.
The invention relates to a high-water-head immersed tube tunnel repeatable grouting device and a construction method, which comprise three parts, and the concrete flow is as follows:
first part, working in the early stage
Firstly, pre-burying a steel pipe 1 when a pipe joint is prefabricated, and pouring paraffin oil 13 into the pre-buried steel pipe 1;
when uneven settlement disease occurs on the pipe joint, scanning the basic state of the pipe joint by adopting a nondestructive detection means, and primarily judging the void and loose position and degree of the tunnel foundation;
step three, detecting and evaluating the conditions of vertical and horizontal shearing keys at the joint of the pipe joints, and judging the settlement conditions of the pipe joints at the two sides according to the extrusion or the desquamation of the vertical shearing keys of the middle 25 and the lower 26; the horizontal shear key 29 needs to be chiseled out firstly when the plate rubber support 27, the polyethylene filling material 28 and the like are extruded and damaged in the sedimentation process, meanwhile, the condition of a water stop belt of a pipe joint is judged to prevent water seepage, and the pipe joint is repaired after grouting and lifting.
And fourthly, according to the detection and analysis results of the second step and the third step, a targeted pipe joint grouting scheme and a shear key repairing scheme are formulated.
Second part, grouting construction
Step five, utilizing the middle corridor space as a construction site, as shown in fig. 6, so as to maximally reduce the influence of construction on traffic;
step six, installing grouting equipment in a pipe, as shown in fig. 7, installing a control valve 14 at the flange 4 at the top end of the embedded steel pipe 1, wherein a blowout preventer 15 is connected behind the control valve 14, the blowout preventer 15 is connected with a slurry mixer 16, a grouting pressure gauge 17 is installed above the slurry mixer 16, and the slurry mixer 16 is connected with a cement slurry pump 18 and other slurry pumps 19;
step seven, as shown in fig. 7, a grouting pipeline 20 between the connection devices can realize multi-hole synchronous grouting, the cement slurry pump 18 and other slurry pumps 19 are respectively connected with the slurry mixer 16 by using grouting pipelines, and the slurry is injected into the mixer 16 through the cement slurry pump 18 and other slurry pumps 19 to be uniformly stirred, so as to prepare grouting slurry 21;
step eight, determining grouting pressure according to soil covering, water depth and structural self weight, extracting paraffin oil 13 in the embedded steel pipe 1, starting grouting, recording grouting pressure according to the pressure gauge 17 during grouting, preventing the grouting pressure from exceeding a maximum allowable value, enabling a spring 7 to shrink under the grouting pressure to pull a water stop valve 6 to move downwards in the grouting process, and injecting grouting slurry 21 into a immersed tube foundation after passing through the valve and a grid cover plate 8;
and step nine, refilling paraffin oil 13 in the embedded steel pipe 1 after grouting is completed, and repeating the steps when the uneven sedimentation disease appears again, so that the embedded steel pipe 1 is recycled.
Third part, shear key repair
Tenth, after grouting achieves the expected lifting effect, recovering in situ to fall off and damage the steel shear key bolts caused by sedimentation; repairing the cracks in the range of the reinforced concrete shearing bond and the pipe joint damaged by extrusion.
Step eleven, cleaning the rubber support 24 which is damaged by extrusion between the vertical shearing keys, and replacing the rubber support with a steel backing plate with proper size for preventing the extrusion damage again.
And twelve, cleaning the horizontal shear key 29 of the pipe joint, roughening the original shear key position, and then re-paving the cover plate 30, pouring the horizontal shear key 29, mounting the plate type rubber support 27 and filling the polyethylene 28. And during construction, chamfering construction is adopted, and a side lane of the side wall is constructed firstly and then a side lane of the middle partition wall is constructed.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art in a specific case.
Claims (6)
1. The utility model provides a but high flood peak immersed tube tunnel repeated slip casting device and construction method, mainly includes flange (4), pre-buried steel pipe (1) and check valve (6) that link to each other in proper order, its characterized in that, pre-buried steel pipe (1) pre-buried is at tube coupling bottom plate (2) when tube coupling prefabrication, pre-buried steel pipe (1) top arrange at side wall and intermediate wall go out with flange (4) are connected, pre-buried steel pipe (1) and tube coupling bottom steel sheet (3) welding, pre-buried steel pipe (1) tail end is the expansion section, pre-buried steel pipe expansion section (12) are inside to be equipped with the check valve, pre-buried steel pipe expansion section (12) adopt welding seam (11) to connect.
2. The high-water-head immersed tube tunnel repeatable grouting device and the construction method thereof according to claim 1 are characterized in that a water stop steel plate (5) is arranged on the surface of the embedded steel tube (1), and paraffin oil (13) is poured into the embedded steel tube (1).
3. The repeatable grouting device and the construction method for the high-water-head immersed tube tunnel are characterized in that the embedded steel tube expansion section (12) is welded with a bottom plate steel bar (9) in the tube joint bottom plate (2), and a circle of steel bar cage (10) is arranged on the periphery of the embedded steel tube expansion section (12).
4. The repeatable grouting device and the construction method for the high-head immersed tube tunnel are characterized in that a grid cover plate (8) is arranged at a grouting hole of the tube segment bottom steel plate (3).
5. The high-head immersed tube tunnel repeatable grouting device and the construction method according to claim 1 are characterized in that a spring (7) and a check valve (6) are arranged in the embedded steel tube expansion section (12), and the spring (7) is connected with the check valve (6) and then supported on the grid cover plate (8).
6. The utility model provides a high water head immersed tube tunnel repeatable grouting device and construction method, mainly includes three parts content, and specific steps are as follows:
first part, working in the early stage:
firstly, pre-burying a steel pipe (1) during pipe joint prefabrication, and pouring paraffin oil (13) into the pre-burying steel pipe (1);
when the pipe joint suffers from uneven sedimentation disease, scanning the basic state of the pipe joint by adopting a nondestructive detection means, and primarily judging the void and loose position and degree of the tunnel foundation;
detecting and evaluating the conditions of vertical and horizontal shear keys (29) at the pipe joint (22), and judging the settlement conditions of pipe joints at two sides according to extrusion or desquamation of the upper shear key (23), the middle shear key (25) and the lower shear key (26); the horizontal shearing key (29) is required to be chiseled out firstly when the plate-type rubber support (27), the polyethylene filling material (28) and the like are extruded and damaged in the sedimentation process, meanwhile, the water stop condition of the pipe joint (22) is judged to prevent water seepage, and the pipe joint is repaired after grouting and lifting.
And fourthly, according to the detection and analysis results of the second step and the third step, a targeted pipe joint grouting scheme and a shear key repairing scheme are formulated.
And the second part, grouting construction:
step five, using the middle corridor space as a construction site, and maximally reducing the influence of construction on traffic;
step six, installing grouting equipment in a pipe, installing a control valve (14) at a flange plate (4) at the top end of the embedded steel pipe (1), connecting a blowout preventer (15) behind the control valve (14), connecting a slurry mixer (16) to the blowout preventer (15), installing a grouting pressure gauge (17) above the slurry mixer (16), and connecting a cement slurry pump (18) and other slurry pumps (19) to the slurry mixer (16);
step seven, connecting grouting pipelines (20) among all devices, respectively connecting the cement slurry pump (18) and other slurry pumps (19) with the slurry mixer (16) by using the grouting pipelines (20), and injecting slurry into the mixer (16) through the cement slurry pump (18) and the other slurry pumps (19) to be uniformly stirred to prepare grouting slurry (21);
step eight, determining grouting pressure according to soil covering, water depth and structural self weight, starting grouting after extracting paraffin oil (13) in the embedded steel pipe (1), recording grouting pressure according to the pressure gauge (17) during grouting, preventing the grouting pressure from exceeding a maximum allowable value, enabling a spring (7) to shrink under the action of grouting pressure in the grouting process to drive a check valve (6) to move downwards, and injecting grouting slurry (21) into a immersed tube foundation after passing through the valve and a grid cover plate (8);
and step nine, refilling paraffin oil (13) in the embedded steel pipe (1) after grouting is completed, and repeating the steps when the non-uniform sedimentation disease is encountered again for recycling.
Third part, shear key repair
Tenth, after grouting achieves the expected lifting effect, recovering in situ to fall off and damage the steel shear key bolts caused by sedimentation; repairing the cracks in the range of the reinforced concrete shear bond and the pipe joint connector (22) damaged by extrusion.
And step eleven, cleaning the rubber support body (24) which is damaged by extrusion between the vertical shearing keys, and replacing the rubber support body with a steel backing plate with proper size for preventing the extrusion damage again.
And twelve, cleaning the horizontal shearing key (29) of the pipe joint connector (22), roughening the original shearing key position, and then re-paving the cover plate body (30), pouring the horizontal shearing key (29), mounting the plate-type rubber support (27) and filling the polyethylene (28).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311177043.2A CN117328462A (en) | 2023-09-13 | 2023-09-13 | High-water-head immersed tube tunnel repeatable grouting device and construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311177043.2A CN117328462A (en) | 2023-09-13 | 2023-09-13 | High-water-head immersed tube tunnel repeatable grouting device and construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117328462A true CN117328462A (en) | 2024-01-02 |
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ID=89289345
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311177043.2A Pending CN117328462A (en) | 2023-09-13 | 2023-09-13 | High-water-head immersed tube tunnel repeatable grouting device and construction method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117328462A (en) |
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2023
- 2023-09-13 CN CN202311177043.2A patent/CN117328462A/en active Pending
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