CN110863521A - Method and device for treating defects of pile foundation by grouting - Google Patents
Method and device for treating defects of pile foundation by grouting Download PDFInfo
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- CN110863521A CN110863521A CN201911162628.0A CN201911162628A CN110863521A CN 110863521 A CN110863521 A CN 110863521A CN 201911162628 A CN201911162628 A CN 201911162628A CN 110863521 A CN110863521 A CN 110863521A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D37/00—Repair of damaged foundations or foundation structures
Abstract
The invention discloses a method and a device for treating defects of a pile foundation by grouting, wherein the grouting treatment method comprises the following steps: determining the position of a defective layer, drilling a grouting hole, embedding a grouting pipe and a grout outlet pipe, cleaning sediment, grouting and cleaning, wherein the device for treating the pile foundation defect by grouting comprises the grouting pipe and the grout outlet pipe, the grouting pipe and the grout outlet pipe are vertically arranged in the grouting hole and are parallel to an acoustic detection pipe, the top of the grouting pipe extends out of the pile foundation plane by 500-700mm and is communicated with an output port of a slurry pump through a water pipe, the diameter of the grouting hole is controlled to be 90-110mm, and a supporting layer and an isolating layer are arranged in the grouting hole and on the grouting pipe and the grout outlet pipe. The grouting method is scientific and reasonable, simple and practical, has short treatment period, can perform targeted treatment on the defect layer, saves the construction cost, has simple structure, low cost and strong adaptability, meets the use requirement of the grouting engineering quantity, and has remarkable grouting quality effect.
Description
Technical Field
The invention relates to the field of buildings, in particular to a method and a device for treating defects of a pile foundation by grouting.
Background
The pile foundation is widely applied to the foundation structure of the bridge, but the quality defects of the pile foundations in different degrees can be caused easily due to the reasons of complex geological conditions, restriction of construction technical level, low quality of constructors and the like.
At present, although there are many methods for treating quality defects of pile foundations at home and abroad, the following problems exist: 1. the construction conditions are complex, the device structure is complex, the construction cost is high, the construction cost is greatly increased, the market demands for pile foundation grouting treatment at present are difficult to meet, 2, the construction grouting effect is not ideal, the strength of the pile foundation after grouting cannot meet the requirements of use strength, and the quality hidden danger is caused; 3. the method has the advantages that the silt impurities at the position of the fracture layer are difficult to clean, a large amount of silt impurities are easy to mix in during subsequent grouting, the strength of the pile foundation is reduced, the defect layer is difficult to be filled with cement slurry, construction of subsequent processes is influenced, and engineering stagnation is caused.
Disclosure of Invention
The invention aims to solve the problems, provides a method and a device for treating pile foundation defects by grouting, and the grouting method is scientific, reasonable, simple, practical, short in treatment period, capable of performing targeted treatment and strength reinforcement on a defect layer, increasing the bearing strength and the bearing limit of a pile foundation, saving the construction cost, simple in structure, low in cost, strong in adaptability, capable of meeting the use requirement and the strength requirement of grouting engineering quantity, remarkable in grouting quality effect and capable of guaranteeing the smooth progress of engineering construction.
In order to realize the purpose, the invention adopts the technical scheme that: a method for treating defects of a pile foundation by grouting comprises the following treatment steps:
A. determining the position of a defect layer, arranging sound detection tubes on the pile foundation in a manner of being vertical to the ground annular array, acquiring and processing detection data through an ultrasonic detection device, and detecting the defect part of the pile foundation for multiple times so as to determine the position of the defect layer;
B. b, drilling grouting holes, wherein in the step A, when a defect layer is detected to exist between only two groups of sound measuring tubes, one grouting hole is set; when a defect layer exists between more than two groups of acoustic pipes, the number of the grouting holes is consistent with the number of the acoustic pipes on the defect layer, a concrete drilling core extractor is adopted to drill the grouting holes, when the position depth of the defect layer is not more than 30m from the pile base plane, a drill bit with the diameter of 90-110mm is adopted to drill the grouting holes, the depth of the drilled grouting holes exceeds the defect layer, when the position depth of the defect layer is more than 30m from the pile base plane, the drill bit with the diameter of 110mm is firstly adopted to drill to the position with the depth of 30m, then the drill bit with the diameter of 90mm is adopted to continue drilling, and the depth of the drilled grouting holes exceeds the defect layer;
C. embedding a grouting pipe and a grout outlet pipe, wherein the grouting pipe and the grout outlet pipe are vertically arranged in a grouting hole in parallel, the grouting pipe and the grout outlet pipe are temporarily fixed by adopting a steel wire and a support frame, a support layer is arranged in the grouting hole and at a position 50-60cm away from a pile base surface, and then an isolation layer is arranged between the support layer and a pile foundation surface;
D. cleaning sediment, removing a steel wire and a support frame for temporarily fixing the grouting pipe and the slurry outlet pipe after the isolation layer is arranged for three days, installing and connecting the output port of the slurry pump with the top of the grouting pipe through a water pipe, opening control valves on the grouting pipe and the slurry outlet pipe, driving the slurry pump to inject clear water into the grouting hole, stopping cleaning when the liquid discharged by the slurry outlet pipe does not contain silt impurities, when the number of the grouting holes is multiple, closing the control valve of the grout outlet pipe in the current grouting hole, opening the control valve of the grout outlet pipe in the other grouting hole, driving a mud pump to continuously clean until all the grouting holes are cleaned, then closing control valves on all grouting pipes and slurry outlet pipes, connecting a water pipe with the top of the slurry outlet pipe in another grouting hole, and repeating the cleaning operation according to the operation process to completely discharge silt impurities in each grouting hole;
E. grouting, namely pumping cement slurry into the grouting hole from the grouting pipe through a slurry pump, wherein the grouting operation process is consistent with the operation step of cleaning by injecting clear water in the step D, and in the cement slurry pumping process, when the concentration of the cement slurry discharged by the slurry outlet pipe is consistent with that of the cement slurry pumped in, closing a control switch of the slurry outlet pipe, keeping the grouting process for 2-4 minutes continuously, and then closing the control switch of the grouting pipe;
F. and E, cleaning, namely cutting off the grouting pipe and the grout outlet pipe extending out of the base surface of the pile 10-11 days after the step E is finished.
Further, in step B, the depth of the grouting hole is drilled to exceed the depth of the defect layer 300-500 mm.
Further, in the step C, the top of the grouting pipe extends out of the pile foundation plane by 500-700mm, the lower end of the grouting pipe extends into the position of the defect layer by 200-300mm, the upper end of the slurry outlet pipe is 2.5-2.8m higher than the pile foundation plane, and the lower end of the slurry outlet pipe extends into the grouting hole by 700-800 mm.
And step C, the supporting layer is made of foam rubber, the isolation layer is made of high-strength polymer mortar, and the thickness of the isolation layer in the grouting hole is larger than 300 mm.
Further, in the step D, the cleaning pressure for cleaning the silt impurities is controlled to be 500-1000 kpa.
A device for treating defects of a pile foundation by grouting comprises a grouting pipe and a slurry outlet pipe, wherein the grouting pipe and the slurry outlet pipe are vertically arranged in a grouting hole and are parallel to an acoustic detection pipe, the grouting pipe and the slurry outlet pipe are both of hollow tubular structures made of steel, the inner diameters of the grouting pipe and the slurry outlet pipe are both 24mm, the wall thickness of the grouting pipe is 3-4mm, the top of the grouting pipe extends out of a pile foundation plane by 500mm and is communicated with an output port of a slurry pump through a water pipe, the diameter of the grouting hole is controlled to be 90-110mm, a supporting layer and an isolating layer are arranged in the grouting hole and positioned on the grouting pipe and the slurry outlet pipe, the lower end of the grouting hole is isolated to form a cavity, the lower ends of the grouting pipe and the slurry outlet pipe both downwards penetrate through the supporting layer and the isolating layer, the lower end of the grouting pipe extends into a defect layer position below the grouting hole by 200 mm and 300mm, the upper end of the slurry outlet pipe is 2.5-2.8m higher than the plane of the pile foundation, the lower end of the slurry outlet pipe extends into the slurry injection hole for 700-800mm, the bottom of the slurry outlet pipe is lower than the bottom of the supporting layer, and the upper ends of the slurry injection pipe and the slurry outlet pipe are respectively provided with a control valve for controlling on-off and a pressure detection meter for detecting pressure.
Further, the supporting layer is a plate-shaped structure formed by condensing foam rubber, the isolation layer is a block-shaped structure formed by condensing high-strength polymer mortar, and the grouting pipe and the grout outlet pipe are fixed in the grouting hole by the supporting layer and the isolation layer.
Furthermore, through holes are formed in the area, 500mm away from the bottom surface, of the lower end of the grouting pipe and on the pipe wall of the grouting pipe at intervals.
The invention has the beneficial effects that: the invention provides a method and a device for treating pile foundation defects by grouting, the grouting method is scientific and reasonable, simple and practical, has short treatment period, can carry out targeted treatment and strength reinforcement on a defect layer, increases the bearing strength and the bearing limit of a pile foundation, saves the construction cost, has simple structure, low cost and strong adaptability, meets the use requirement and the strength requirement of grouting engineering quantity, has obvious grouting quality effect, and ensures the smooth progress of engineering construction.
1. The invention solves the quality defect of the existing drilling grouting pile foundation defect layer, the defect part is cleaned by adopting high-pressure water, then the cement paste with the same strength is adopted for filling and reinforcing after the silt impurities at the defect part are confirmed to be cleaned, the pile body quality reaches the strength and compactness required by the design and specification, the defect layer area of the pile foundation is positioned according to the ultrasonic detection device and the sound detection pipe, the depth and the area of the defect layer are accurately judged, and a foundation is provided for subsequent cleaning and grouting.
2. The invention is designed with one group or a plurality of groups of grouting holes, which can be designed as a single group of grouting holes or a plurality of groups of grouting holes to carry out grouting treatment, wherein the single group of grouting holes form a feedback loop for cleaning and grouting for the grouting pipes and the slurry outlet pipes, and the plurality of groups of grouting holes form a feedback loop for cleaning and grouting for the grouting pipes of a certain grouting hole and the slurry outlet pipes of another grouting hole.
3. The grouting pipe provided by the invention extends into the position of the defect layer, can effectively clean the position of the defect layer, enables the cement slurry at the position of the defect layer to be full and full, can form a targeted curing layer on the position of the defect layer, strengthens the whole region of the defect layer, and has very strong practicability and adaptability.
4. The slurry outlet pipe and the pile foundation plane form a certain height difference, and the cavity at the lower end of the grouting hole is in a pressure state in the cleaning and grouting processes, so that the cleanness degree in the cleaning process and the compactness of cement slurry in the grouting process are greatly improved, and compared with the prior art, the technical effect is obviously better.
5. According to the invention, through holes are arranged in the area of the lower end part of the grouting pipe 500mm away from the bottom surface and on the pipe wall of the grouting pipe at annular intervals, so that water flow can be sprayed out from the periphery of the lower end part of the grouting pipe in the auxiliary cleaning process, the area for cleaning silt impurities and the cleaning effect are increased, and the practicability is very strong.
Drawings
FIG. 1 is a schematic front view of a single set of grouting holes according to the present invention.
FIG. 2 is a schematic view of a structure of a plurality of grouting holes according to the present invention.
FIG. 3 is a schematic top view of a plurality of grouting holes according to the present invention.
FIG. 4 is a schematic structural view of the bottom of the grouting pipe according to the present invention.
The text labels in the figures are represented as: 1. a sound detection tube; 2. a grouting pipe; 3. a control valve; 4. a pressure detection meter; 5. a water pipe; 6. a pulp outlet pipe; 7. a slurry pump; 8. an isolation layer; 9. a support layer; 10. grouting holes; 11. a defect layer; 201. and a through hole.
Detailed Description
The present invention will be described in detail with reference to embodiments for better understanding of the technical solutions of the present invention by those skilled in the art, and the description of the present invention is only exemplary and explanatory and should not be construed as limiting the scope of the present invention in any way.
As shown in fig. 1 to 4, the specific structure of the present invention is: a method for treating defects of a pile foundation by grouting comprises the following treatment steps:
A. determining the position of a defect layer, arranging four groups of sound measuring tubes on the pile foundation in a manner of being vertical to the ground annular array, acquiring and processing detection data through an ultrasonic detection device, and detecting the defect part of the pile foundation for multiple times, thereby determining the position of the defect layer;
B. b, drilling grouting holes, wherein in the step A, when a defect layer is detected to exist between only two groups of sound measuring tubes, one grouting hole is set; when a defect layer exists between more than two groups of acoustic pipes, the number of the grouting holes is consistent with the number of the acoustic pipes on the defect layer, a concrete drilling core extractor is adopted to drill the grouting holes, when the position depth of the defect layer is not more than 30m from the pile base plane, a drill bit with the diameter of 90-110mm is adopted to drill the grouting holes, the depth of the drilled grouting holes exceeds the defect layer, when the position depth of the defect layer is more than 30m from the pile base plane, the drill bit with the diameter of 110mm is firstly adopted to drill to the position with the depth of 30m, then the drill bit with the diameter of 90mm is adopted to continue drilling, and the depth of the drilled grouting holes exceeds the defect layer;
C. embedding a grouting pipe and a grout outlet pipe, wherein the grouting pipe and the grout outlet pipe are vertically arranged in a grouting hole in parallel, the grouting pipe and the grout outlet pipe are temporarily fixed by adopting a steel wire and a support frame, a support layer is arranged in the grouting hole and at a position 50-60cm away from a pile base surface, and then an isolation layer is arranged between the support layer and a pile foundation surface;
D. cleaning sediment, removing a steel wire and a support frame for temporarily fixing the grouting pipe and the slurry outlet pipe after the isolation layer is arranged for three days, installing and connecting the output port of the slurry pump with the top of the grouting pipe through a water pipe, opening control valves on the grouting pipe and the slurry outlet pipe, driving the slurry pump to inject clear water into the grouting hole, stopping cleaning when the liquid discharged by the slurry outlet pipe does not contain silt impurities, when the number of the grouting holes is multiple, closing the control valve of the grout outlet pipe in the current grouting hole, opening the control valve of the grout outlet pipe in the other grouting hole, driving a mud pump to continuously clean until all the grouting holes are cleaned, then closing control valves on all grouting pipes and slurry outlet pipes, connecting a water pipe with the top of the slurry outlet pipe in another grouting hole, and repeating the cleaning operation according to the operation process to completely discharge silt impurities in each grouting hole;
E. grouting, namely pumping cement slurry into a grouting hole from a grouting pipe through a slurry pump, wherein the strength of the cement slurry cannot be lower than the designed strength of the pile foundation, the grouting operation process is consistent with the operation step of injecting clear water for cleaning in the step D, in the cement slurry pumping process, when the concentration of the cement slurry discharged from a slurry outlet pipe is consistent with that of the cement slurry pumped in, closing a control switch of the slurry outlet pipe, keeping the grouting process for 2-4 minutes continuously, and then closing the control switch of the grouting pipe;
F. and E, cleaning, namely after the step E is finished for 10-11 days, cutting off the grouting pipe and the grout outlet pipe extending out of the pile base surface, checking and dredging the ultrasonic detection pipe, then carrying out ultrasonic detection on the pile foundation, and carrying out construction of the next step after the detection result meets the design and standard requirements.
In some embodiments of the present invention, step B, the depth of the grouting hole is drilled to exceed 300mm and 500mm of the defect layer.
In some embodiments of the invention, in the step C, the top of the grouting pipe extends out of the pile foundation plane by 500-.
In some embodiments of the present invention, in step C, the support layer is a foam adhesive, the isolation layer is a high-strength polymer mortar, and the thickness of the isolation layer in the grouting hole is greater than 300 mm.
In some embodiments of the present invention, in step D, the cleaning pressure for cleaning the silt impurities is controlled to be 500-.
A device for treating defects of a pile foundation by grouting comprises a grouting pipe 2 and a slurry outlet pipe 6, wherein the grouting pipe 2 and the slurry outlet pipe 6 are vertically arranged in a grouting hole 10, the grouting pipe 2 and the slurry outlet pipe 6 are parallel to an acoustic pipe 1, the grouting pipe 2 and the slurry outlet pipe 6 are both of hollow tubular structures made of steel, the inner diameters of the grouting pipe 2 and the slurry outlet pipe 6 are 24mm, the pipe wall thickness is 3-4mm, the top of the grouting pipe 2 extends out of a pile foundation plane 500-shaped sand-baked sand, the upper end of the slurry outlet pipe 6 is 2.5-2.8m higher than the plane of the pile foundation, the lower end of the slurry outlet pipe 6 extends into the slurry injection hole 10 for 700-800mm, the bottom of the slurry outlet pipe 6 is lower than the bottom of the support layer 9, and the upper ends of the slurry injection pipe 2 and the slurry outlet pipe 6 are respectively provided with a control valve 3 for controlling on-off and a pressure detection meter 4 for detecting pressure.
In some embodiments of the present invention, the support layer 9 is a plate-shaped structure formed by coagulating foam rubber, the isolation layer 8 is a block-shaped structure formed by coagulating high-strength polymer mortar, and the support layer 9 and the isolation layer 8 fix the grouting pipe 2 and the grout outlet pipe 6 in the grouting hole 10.
In some embodiments of the present invention, through holes 201 are provided in the area of the lower end of the grouting pipe 2 500mm from the bottom surface and at an annular interval on the pipe wall of the grouting pipe 2.
The grouting method is scientific, reasonable, simple and practical, has short processing period, can perform targeted processing and strength reinforcement on the defect layer, increases the bearing strength and the bearing limit of the pile foundation, saves the construction cost, has simple structure, low cost and strong adaptability, meets the use requirement and the strength requirement of the grouting engineering quantity, has obvious grouting quality effect, and ensures the smooth progress of the engineering construction.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The principles and embodiments of the present invention are explained herein using specific examples, which are presented only to assist in understanding the method and its core concepts of the present invention. The foregoing is only a preferred embodiment of the present invention, and it should be noted that there are objectively infinite specific structures due to the limited character expressions, and it will be apparent to those skilled in the art that a plurality of modifications, decorations or changes may be made without departing from the principle of the present invention, and the technical features described above may be combined in a suitable manner; such modifications, variations, combinations, or adaptations of the invention using its spirit and scope, as defined by the claims, may be directed to other uses and embodiments.
Claims (8)
1. A method for treating defects of a pile foundation by grouting is characterized by comprising the following treatment steps:
A. determining the position of a defect layer, arranging sound detection tubes on the pile foundation in a manner of being vertical to the ground annular array, acquiring and processing detection data through an ultrasonic detection device, and detecting the defect part of the pile foundation for multiple times so as to determine the position of the defect layer;
B. b, drilling grouting holes, wherein in the step A, when a defect layer is detected to exist between only two groups of sound measuring tubes, one grouting hole is set; when a defect layer exists between more than two groups of acoustic pipes, the number of the grouting holes is consistent with the number of the acoustic pipes on the defect layer, a concrete drilling core extractor is adopted to drill the grouting holes, when the position depth of the defect layer is not more than 30m from the pile base plane, a drill bit with the diameter of 90-110mm is adopted to drill the grouting holes, the depth of the drilled grouting holes exceeds the defect layer, when the position depth of the defect layer is more than 30m from the pile base plane, the drill bit with the diameter of 110mm is firstly adopted to drill to the position with the depth of 30m, then the drill bit with the diameter of 90mm is adopted to continue drilling, and the depth of the drilled grouting holes exceeds the defect layer;
C. embedding a grouting pipe and a grout outlet pipe, wherein the grouting pipe and the grout outlet pipe are vertically arranged in a grouting hole in parallel, the grouting pipe and the grout outlet pipe are temporarily fixed by adopting a steel wire and a support frame, a support layer is arranged in the grouting hole and at a position 50-60cm away from a pile base surface, and then an isolation layer is arranged between the support layer and a pile foundation surface;
D. cleaning sediment, removing a steel wire and a support frame for temporarily fixing the grouting pipe and the slurry outlet pipe after the isolation layer is arranged for three days, installing and connecting the output port of the slurry pump with the top of the grouting pipe through a water pipe, opening control valves on the grouting pipe and the slurry outlet pipe, driving the slurry pump to inject clear water into the grouting hole, stopping cleaning when the liquid discharged by the slurry outlet pipe does not contain silt impurities, when the number of the grouting holes is multiple, closing the control valve of the grout outlet pipe in the current grouting hole, opening the control valve of the grout outlet pipe in the other grouting hole, driving a mud pump to continuously clean until all the grouting holes are cleaned, then closing control valves on all grouting pipes and slurry outlet pipes, connecting a water pipe with the top of the slurry outlet pipe in another grouting hole, and repeating the cleaning operation according to the operation process to completely discharge silt impurities in each grouting hole;
E. grouting, namely pumping cement slurry into the grouting hole from the grouting pipe through a slurry pump, wherein the grouting operation process is consistent with the operation step of cleaning by injecting clear water in the step D, and in the cement slurry pumping process, when the concentration of the cement slurry discharged by the slurry outlet pipe is consistent with that of the cement slurry pumped in, closing a control switch of the slurry outlet pipe, keeping the grouting process for 2-4 minutes continuously, and then closing the control switch of the grouting pipe;
F. and E, cleaning, namely cutting off the grouting pipe and the grout outlet pipe extending out of the base surface of the pile 10-11 days after the step E is finished.
2. The method for grouting treatment of pile foundation defects according to claim 1, wherein in the step B, the depth of the grouting hole is 500mm over the defect layer 300.
3. The method for treating defects of pile foundation by grouting according to claim 1, wherein in step C, the top of the grouting pipe extends 500-700mm above the plane of the pile foundation, the lower end of the grouting pipe extends 200-300mm above the position of the defect layer, the upper end of the grout outlet pipe is 2.5-2.8m above the plane of the pile foundation, and the lower end of the grout outlet pipe extends 700-800mm above the grout hole.
4. The method for grouting a pile foundation defect according to claim 1, wherein in step C, the supporting layer is foam rubber, the isolation layer is high-strength polymer mortar, and the thickness of the isolation layer in the grouting hole is more than 300 mm.
5. The method for treating the defect of the pile foundation through grouting according to claim 1, wherein in the step D, the cleaning pressure for cleaning the silt impurities is controlled to be 500-.
6. A device for realizing the method for grouting pile foundation defects according to any one of claims 1-5, which comprises a grouting pipe (2) and a slurry outlet pipe (6), wherein the grouting pipe (2) and the slurry outlet pipe (6) are both vertically arranged in a grouting hole (10), the grouting pipe (2) and the slurry outlet pipe (6) are both parallel to the sounding pipe (1), the grouting pipe (2) and the slurry outlet pipe (6) are both hollow tubular structures made of steel, the inner diameters of the grouting pipe (2) and the slurry outlet pipe (6) are both 24mm, the thickness of the pipe wall is 3-4mm, the top of the grouting pipe (2) extends out of a pile foundation plane by 500mm and is communicated with an output port of a slurry pump (7) through a water pipe (5), the diameter of the slurry pump grouting hole (10) is controlled to be 90-110mm, a supporting layer is arranged in the grouting hole (10) and is arranged on the grouting pipe (2) and the slurry outlet pipe (6) and is provided with an isolation layer (9) and an isolation layer (8), the lower ends of the grouting holes (10) are isolated to form a cavity, the lower ends of the grouting pipes (2) and the slurry outlet pipes (6) downwards penetrate through the supporting layer (9) and the isolating layer (8), the lower ends of the grouting pipes (2) extend into the position of the defect layer (11) below the grouting holes (10) by 200-300mm, the upper ends of the slurry outlet pipes (6) are higher than the plane of the pile foundation by 2.5-2.8m, the lower ends of the slurry outlet pipes (6) extend into the grouting holes (10) by 700-800mm, the bottoms of the slurry outlet pipes (6) are lower than the bottom of the supporting layer (9), and the upper ends of the grouting pipes (2) and the slurry outlet pipes (6) are respectively provided with a control valve (3) for controlling on-off and a pressure detection meter (4) for detecting pressure.
7. A grouting treatment pile foundation defect device according to claim 6, characterised in that the supporting layer (9) is a slab structure coagulated by foam rubber, the isolating layer (8) is a block structure coagulated by high strength polymer mortar, and the supporting layer (9) and the isolating layer (8) fix the grouting pipe (2) and the grout outlet pipe (6) in the grouting hole (10).
8. The device for grouting pile foundation defects according to claim 6, wherein through holes (201) are arranged in the area of the lower end part of the grouting pipe (2) 500mm away from the bottom surface and on the pipe wall of the grouting pipe (2) at annular intervals.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911162628.0A CN110863521A (en) | 2019-11-25 | 2019-11-25 | Method and device for treating defects of pile foundation by grouting |
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| CN201911162628.0A CN110863521A (en) | 2019-11-25 | 2019-11-25 | Method and device for treating defects of pile foundation by grouting |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113774970A (en) * | 2021-08-05 | 2021-12-10 | 深圳宏业基岩土科技股份有限公司 | Cast-in-place pile socketed section defect repairing construction method |
| CN115262545A (en) * | 2022-08-09 | 2022-11-01 | 浙江欧感机械制造有限公司 | Pile end loading composite post-grouting method and device |
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| CN103603345A (en) * | 2013-10-31 | 2014-02-26 | 周兆弟 | Cement mixing grouting pile foundations and forming method |
| CN105220687A (en) * | 2014-06-30 | 2016-01-06 | 中国一冶集团有限公司 | Prestressed concrete pipe pile grouting behind shaft or drift lining method fills with core reinforcing construction method |
| CN109056734A (en) * | 2018-08-27 | 2018-12-21 | 上海市基础工程集团有限公司 | Diaphram wall defect grouting mending construction method |
| CN110453682A (en) * | 2019-08-07 | 2019-11-15 | 启东市建筑设计院有限公司 | A kind of tubular pole reinforcement system construction method |
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| CN103603345A (en) * | 2013-10-31 | 2014-02-26 | 周兆弟 | Cement mixing grouting pile foundations and forming method |
| CN105220687A (en) * | 2014-06-30 | 2016-01-06 | 中国一冶集团有限公司 | Prestressed concrete pipe pile grouting behind shaft or drift lining method fills with core reinforcing construction method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113774970A (en) * | 2021-08-05 | 2021-12-10 | 深圳宏业基岩土科技股份有限公司 | Cast-in-place pile socketed section defect repairing construction method |
| CN115262545A (en) * | 2022-08-09 | 2022-11-01 | 浙江欧感机械制造有限公司 | Pile end loading composite post-grouting method and device |
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Application publication date: 20200306 |
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