CN115262564B - Improved deep water grouting construction method - Google Patents
Improved deep water grouting construction method Download PDFInfo
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- CN115262564B CN115262564B CN202210827696.XA CN202210827696A CN115262564B CN 115262564 B CN115262564 B CN 115262564B CN 202210827696 A CN202210827696 A CN 202210827696A CN 115262564 B CN115262564 B CN 115262564B
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- 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
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- 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
- E02D15/04—Placing concrete in mould-pipes, pile tubes, bore-holes or narrow shafts
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- 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)
- Revetment (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention discloses an improved deep water grouting construction method, which comprises the following steps: the bottom of the well wall is provided with a guiding pit with a cross section area smaller than the cross section area of the well drilling; the grouting pipe and the slurry returning pipe synchronously extend into the well wall, the axes of the grouting pipe and the slurry returning pipe are kept perpendicular to the horizontal line, the bottom of the air pocket cover is ensured to horizontally enter water, and then air is arranged in the air pocket cover to form an air pocket; until the air cavity cover corresponds to the guide pit, the air cavity cover is anastomosed with the guide pit to form a closed space; injecting cement slurry into the inner side of the guide pit through the grouting pipe, wherein in the injection process, the discharge end of the grouting pipe is positioned at the air cavity, so that the injection pressure is reduced by utilizing the air cavity; the air inside the cavity can be discharged to the outside of the well wall in the initial grouting, compared with drainage, the pressure of the air discharge is small, the pressure of the air is reduced along with the discharge of the air from the inner side of the slurry returning pipe, and then the air is discharged, so that the water can be sucked to the inner side of the slurry returning pipe until the water is discharged because of the reduction of the pressure of the inner side of the slurry returning pipe.
Description
Technical Field
The invention belongs to the technical field of hydraulic engineering, and particularly relates to an improved deep water grouting construction method.
Background
The deep water grouting is different from the conventional grouting, the water pressure of the deep water grouting is high, the water pressure is high, the two problems are brought about, the first is that the grouting needs to raise the grouting pressure, otherwise, the grouting operation cannot be successfully completed, the second is that the grouting needs to discharge water upwards, and the discharged water is convenient for observing the grouting returning condition; however, as the deep water pressure is high, the grouting difficulty and the drainage difficulty are both increased, so that an improved deep water grouting construction method is provided.
Disclosure of Invention
The invention aims to provide an improved deep water grouting construction method for solving the problems in the background technology.
In order to achieve the above purpose, the present invention adopts the following technical scheme: an improved deep water grouting construction method comprises the following steps:
A. the bottom of the well wall is provided with a guiding pit with a cross section area smaller than the cross section area of the well drilling;
B. the grouting pipe and the return pipe synchronously extend into the well wall, and the axes of the grouting pipe and the return pipe are kept perpendicular to the horizontal line, namely, the axes of the grouting pipe and the return pipe are parallel to the axis of the well wall, so that the bottom of the air pocket cover is ensured to horizontally enter water, and air pockets are formed in the air pocket cover;
C. until the air cavity cover corresponds to the guide pit, the air cavity cover is anastomosed with the guide pit to form a closed space;
D. injecting cement slurry into the inner side of the guide pit through the grouting pipe, wherein in the injection process, the discharge end of the grouting pipe is positioned at the air cavity, so that the injection pressure is reduced by utilizing the air cavity;
E. when the slurry is accumulated at the bottom of the guide pit, air at the inner side of the cavity is discharged through the slurry return pipe, and meanwhile, continuous grouting is kept, and water is sucked upwards by utilizing the air discharge pressure reduction pressure in the slurry return pipe;
F. after the guide pit is filled, a locating pin for locating the slurry returning pipe is extracted, so that the slurry returning pipe is always kept in a state parallel to the axis of the grouting pipe and gradually rises;
G. and (5) finishing grouting work until the slurry returning is started.
Further, the initial air discharge stage is connected with the side pipe openings of the side edges through a suction pump, and is used for sucking out air and water inside the cavitation cover while grouting in the initial stage.
Further, when the suction pump is used for sucking out air and water, the top end of the slurry return pipe is required to be sealed by a sealing cover.
Further, the rising speed of the slurry returning pipe is consistent with that of the well wall grouting slurry, and a certain distance is reserved between the bottom end of the air pocket cover and the slurry, so that water in the well wall can enter and be discharged through the bottom end of the slurry returning pipe.
Further, the lifting between the slurry returning pipe and the slurry injecting pipe is realized by adding pulleys.
Further, the pulleys are arranged on the inner wall of the slurry returning pipe or the outer wall of the slurry injecting pipe in a rolling mode, the surfaces of the pulleys are abutted against the inner wall of the slurry returning pipe or the outer wall of the slurry injecting pipe, and the pulleys are evenly distributed in an annular mode on the outer side of the slurry injecting pipe.
Further, the cross section of the edge of the pulley is triangular.
Further, a check valve which can only feed downwards is arranged on the inner side of the grouting pipe, so that air is prevented from being discharged through the grouting pipe.
Compared with the prior art, the invention has the beneficial effects that:
1. according to the design, the pressure of initial grouting is reduced by utilizing the mode of air pocket, meanwhile, due to the formation of the air pocket, air inside the cavity can be discharged to the outer side of a well wall, compared with drainage, the pressure of air discharge is small, the pressure of the air is reduced along with the air discharge of the inner side of the slurry returning pipe, and then the air is discharged, so that water can be sucked to the inner side of the slurry returning pipe until the water is discharged due to the reduction of the pressure of the inner side of the slurry returning pipe.
2. The suction pump is adopted to assist the initial stage of exhausting and draining, so that the pouring pressure can be further reduced, and because a relatively airtight space is formed between the cavitation cover and the guide pit, after air and water are pumped out, slurry can be sucked to the inner side of the guide pit, and the success rate of deep water grouting is further increased.
3. By adopting the rising mode of the slurry returning pipe, the false image of slurry returning formed by the slurry being discharged by mistake by the slurry returning pipe can be avoided, meanwhile, the slurry returning pipe keeps a certain distance from the surface of the slurry, and the slurry can synchronously rise to keep the suction effect of the low pressure inside the slurry returning pipe, so that the continuous water discharging effect is realized.
Drawings
The accompanying drawings are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate the invention and together with the embodiments of the invention, serve to explain the invention.
FIG. 1 is a schematic illustration of the present invention;
FIG. 2 is an enlarged schematic view of the portion A of the present invention;
in the figure: 1. a well wall; 101. a guide pit; 2. a formation; 3. grouting pipe; 4. a slurry return pipe; 401. sealing cover; 402. a positioning pin; 403. a side pipe orifice; 404. an air pocket cover; 405. a cavity; 406. and (3) a pulley.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments.
Example 1
Referring to fig. 1 and 2, the present invention proposes a technical solution: an improved deep water grouting construction method comprises the following steps:
s1, a guiding pit 101 with a cross-sectional area smaller than the cross-sectional area of drilling is formed in the bottom of a well wall 1;
s2, sealing the top of the slurry returning pipe 4 through a sealing cover 401, wherein the sealing cover 401 is hollow and annular, sealing can be realized by screwing and fixing the slurry returning pipe 4 and the slurry injecting pipe 3 in a threaded manner, sealing plugs are added at the end parts of side pipe ports 403, and air discharge forming air pockets is avoided;
s3, the grouting pipe 3 and the return pipe 4 synchronously extend into the well wall 1, a check valve which can only feed downwards is arranged on the inner side of the grouting pipe 3, air is prevented from being discharged through the grouting pipe 3, the axes of the grouting pipe 3 and the return pipe 4 are kept perpendicular to a horizontal line, namely, the axes of the grouting pipe 3 and the return pipe 4 are parallel to the axis of the well wall 1, the bottom of the air pocket cover 404 is ensured to horizontally enter water, and then air pockets are formed in the air pocket cover 404;
s4, until the air cavity cover 404 corresponds to the guide pit 101, the air cavity cover 404 is matched with the guide pit 101 to form a closed space;
s5, injecting cement slurry into the inner side of the guide pit 101 through the grouting pipe 3, and simultaneously disassembling the sealing cover 401, wherein in the injection process, as the discharge end of the grouting pipe 3 is positioned at an air cavity position, the injection discharge pressure of the lower end of the grouting pipe 3 is reduced by utilizing an air cavity hollow area;
s6, when slurry is accumulated at the bottom of the guide pit 101, air inside the cavity 405 is discharged through the slurry return pipe 4, and meanwhile, continuous grouting is kept, water is sucked upwards by utilizing air discharge reducing pressure in the slurry return pipe 4, the discharged water falls on the inner side of the well wall 1 through sprinkling, and as grouting is continuously carried out, the pressure of the sprinkled water does not influence grouting;
s7, after the guide pit 101 is filled, a positioning pin 402 for positioning the slurry returning pipe 4 is pulled out, so that the slurry returning pipe 4 always keeps a state parallel to the axis of the grouting pipe 3 and gradually rises, the rising speed of the slurry returning pipe 4 is consistent with that of grouting slurry of the well wall 1, a distance of 0.5m is reserved between the bottom end of the air pocket cover 404 and the slurry, water in the well wall 1 can be ensured to enter and be discharged through the bottom end of the slurry returning pipe 4, and the water discharged by the slurry returning pipe 4;
s8, lifting is achieved between the slurry return pipe 4 and the slurry injection pipe 3 by adding the pulleys 406, the pulleys 406 are installed on the inner wall of the slurry return pipe 4 in a rolling mode, the outer walls of the slurry injection pipes 3 are arranged on the surfaces of the pulleys 406 in an annular mode, the outer sides of the slurry injection pipes 3 are evenly distributed, the cross sections of the edges of the pulleys 406 are triangular, and therefore rolling resistance is reduced conveniently;
and S9, finishing grouting work until the slurry returning pipe 4 starts slurry returning.
Example two
Referring to fig. 1 and 2, the present invention proposes a technical solution: an improved deep water grouting construction method comprises the following steps:
s1, a guiding pit 101 with a cross-sectional area smaller than the cross-sectional area of drilling is formed in the bottom of a well wall 1;
s2, sealing the top of the slurry returning pipe 4 through a sealing cover 401, wherein the sealing cover 401 is hollow and annular, sealing can be realized by screwing and fixing the slurry returning pipe 4 and the slurry injecting pipe 3 in a threaded manner, sealing plugs are added at the end parts of side pipe ports 403, and air discharge forming air pockets is avoided;
s3, the grouting pipe 3 and the return pipe 4 synchronously extend into the well wall 1, a check valve which can only feed downwards is arranged on the inner side of the grouting pipe 3, air is prevented from being discharged through the grouting pipe 3, the axes of the grouting pipe 3 and the return pipe 4 are kept perpendicular to a horizontal line, namely, the axes of the grouting pipe 3 and the return pipe 4 are parallel to the axis of the well wall 1, the bottom of the air pocket cover 404 is ensured to horizontally enter water, and then air pockets are formed in the air pocket cover 404;
s4, the initial air discharge stage is connected with a side pipe port 403 on the side through a guide pipe by a suction pump, the sealing plug is removed before the initial air discharge stage, the suction pump is used for sucking air and water inside the air pocket cover 404 during initial grouting, and when the suction pump is used for sucking the air and the water, the top end of the slurry return pipe 4 is required to be sealed by a sealing cover 401;
s5, until the air cavity cover 404 corresponds to the guide pit 101, the air cavity cover 404 is matched with the guide pit 101 to form a closed space;
s6, injecting cement slurry into the inner side of the guide pit 101 through the grouting pipe 3, wherein grouting and exhausting are synchronously carried out, and in the injection process, as the discharge end of the grouting pipe 3 is positioned at an air cavity position, the grouting and exhausting pressure at the lower end of the grouting pipe 3 is reduced by utilizing an air cavity hollow area;
s7, when slurry is accumulated at the bottom of the guide pit 101, air inside the cavity 405 is discharged through the slurry return pipe 4, and meanwhile, continuous grouting is kept, water is sucked upwards by utilizing air discharge reducing pressure in the slurry return pipe 4, the discharged water falls on the inner side of the well wall 1 through sprinkling, and as grouting is continuously carried out, the pressure of the sprinkled water does not influence grouting;
s8, after the guide pit 101 is filled, a locating pin 402 for locating the slurry returning pipe 4 is pulled out, the suction pump is removed, the sealing cover 401 is detached, the sealing plug of the side pipe port 403 is selectively installed, then the slurry returning pipe 4 is gradually lifted in a state of being parallel to the axis of the grouting pipe 3 all the time, the lifting speed of the slurry returning pipe 4 is consistent with the lifting speed of grouting slurry of the well wall 1, a distance of 0.5m is reserved between the bottom end of the air pocket cover 404 and the slurry, and water in the well wall 1 can be ensured to enter and be discharged through the bottom end of the slurry returning pipe 4, and the water discharged by the slurry returning pipe 4 is ensured;
s9, lifting is achieved between the slurry returning pipe 4 and the slurry injecting pipe 3 by adding the pulleys 406, the pulleys 406 are installed on the inner wall of the slurry returning pipe 4 in a rolling mode, the outer walls of the slurry injecting pipes 3 are arranged on the surfaces of the pulleys 406 in an annular mode, the outer sides of the slurry injecting pipes 3 are evenly distributed, the cross sections of the edges of the pulleys 406 are triangular, and therefore rolling resistance is reduced conveniently;
and S10, finishing grouting work until the slurry returning pipe 4 starts slurry returning.
The present invention is not limited to the above-mentioned embodiments, and any person skilled in the art, based on the technical solution of the present invention and the inventive concept thereof, can be replaced or changed within the scope of the present invention.
Claims (8)
1. An improved deepwater grouting construction method is characterized by comprising the following steps:
A. the bottom of the well wall (1) is provided with a guiding pit (101) with a cross section area smaller than the cross section area of the well drilling;
B. the grouting pipe (3) and the return pipe (4) synchronously extend into the well wall (1), the axes of the grouting pipe (3) and the return pipe (4) are kept perpendicular to the horizontal line, namely, the axes of the grouting pipe (3) and the return pipe (4) are parallel to the axis of the well wall (1), the bottom of the air pocket cover (404) is ensured to horizontally enter water, and air pockets are formed in the air pocket cover (404);
C. until the air cavity cover (404) corresponds to the guide pit (101), the air cavity cover (404) is matched with the guide pit (101) to form a closed space;
D. injecting cement slurry into the inner side of the guide pit (101) through the grouting pipe (3), wherein in the injection process, the discharge end of the grouting pipe (3) is positioned at the air cavity position, so that the injection pressure is reduced by utilizing the air cavity;
E. when the slurry is accumulated at the bottom of the guide pit (101), air inside the cavity (405) is discharged through the slurry return pipe (4), and meanwhile continuous grouting is kept, and water is sucked upwards by utilizing air discharge reducing pressure in the slurry return pipe (4);
F. after the guide pit (101) is filled, a positioning pin (402) for positioning the slurry returning pipe (4) is pulled out, so that the slurry returning pipe (4) is always kept in a state of being parallel to the axis of the grouting pipe (3) and gradually rises;
G. and (5) finishing grouting work until the slurry returning is started.
2. The improved deepwater grouting construction method according to claim 1, wherein the construction method comprises the following steps: the initial air discharge stage is connected with a side pipe port (403) at the side by a suction pump and is used for sucking out air and water inside the cavitation cover (404) at the same time of initial grouting.
3. The improved deepwater grouting construction method according to claim 2, wherein the construction method comprises the following steps: when sucking air and water by using a suction pump, the top end of the slurry return pipe (4) needs to be sealed by using a sealing cover (401).
4. The improved deepwater grouting construction method according to claim 1, wherein the construction method comprises the following steps: the rising speed of the slurry returning pipe (4) is consistent with that of grouting slurry of the well wall (1), a certain distance is reserved between the bottom end of the air pocket cover (404) and the slurry, and water in the well wall (1) can enter and be discharged through the bottom end of the slurry returning pipe (4).
5. The improved deepwater grouting construction method according to claim 1, wherein the construction method comprises the following steps: the lifting is realized by adding a pulley (406) between the slurry returning pipe (4) and the slurry injecting pipe (3).
6. The improved deepwater grouting construction method of claim 5, wherein the method comprises the following steps: the pulley (406) is arranged on the inner wall of the slurry returning pipe (4) or the outer wall of the slurry injecting pipe (3) in a rolling mode, the surface of the pulley (406) is abutted against the inner wall of the slurry returning pipe (4) or the outer wall of the slurry injecting pipe (3), and the pulley is evenly distributed in an annular mode on the outer side of the slurry injecting pipe (3).
7. The improved deepwater grouting construction method of claim 6, wherein the method comprises the following steps: the cross section of the edge of the pulley (406) is triangular.
8. The improved deepwater grouting construction method according to claim 1, wherein the construction method comprises the following steps: the inner side of the grouting pipe (3) is provided with a one-way valve which can only feed downwards, so that air is prevented from being discharged through the grouting pipe (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210827696.XA CN115262564B (en) | 2022-07-15 | 2022-07-15 | Improved deep water grouting construction method |
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| CN202210827696.XA CN115262564B (en) | 2022-07-15 | 2022-07-15 | Improved deep water grouting construction method |
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| Publication Number | Publication Date |
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| CN115262564A CN115262564A (en) | 2022-11-01 |
| CN115262564B true CN115262564B (en) | 2023-07-21 |
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Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2091325B (en) * | 1980-06-17 | 1983-12-14 | Mcalpine & Sons Ltd Sir Robert | Underwater grouting apparatus |
| JP3736626B2 (en) * | 2001-11-01 | 2006-01-18 | 不動建設株式会社 | High fluidity landfill underwater placement equipment |
| CN105604084B (en) * | 2016-03-02 | 2018-11-02 | 福建省水利水电勘测设计研究院 | Offshore wind turbine foundation steel-pipe pile and changeover portion high undersea hydrostatic pressures grouting connection structure and its installation method |
| CN210087318U (en) * | 2019-02-12 | 2020-02-18 | 辽宁省水利水电勘测设计研究院有限责任公司（原名称为辽宁省水利水电勘测设计研究院） | Underwater vertical shaft lining device |
| CN112647499A (en) * | 2021-01-12 | 2021-04-13 | 中国电建集团中南勘测设计研究院有限公司 | Deepwater ground anchor grouting method |
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