CN114293600A - Method for processing broken pile defect of precast pile in weak soil area - Google Patents
Method for processing broken pile defect of precast pile in weak soil area Download PDFInfo
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- CN114293600A CN114293600A CN202111592920.3A CN202111592920A CN114293600A CN 114293600 A CN114293600 A CN 114293600A CN 202111592920 A CN202111592920 A CN 202111592920A CN 114293600 A CN114293600 A CN 114293600A
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 239000002689 soil Substances 0.000 title claims abstract description 24
- 230000007547 defect Effects 0.000 title claims abstract description 16
- 238000012545 processing Methods 0.000 title claims abstract description 10
- 239000011449 brick Substances 0.000 claims abstract description 22
- 238000010276 construction Methods 0.000 claims abstract description 17
- 230000002787 reinforcement Effects 0.000 claims abstract description 17
- 238000009412 basement excavation Methods 0.000 claims abstract description 14
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 12
- 239000010959 steel Substances 0.000 claims abstract description 12
- 238000013461 design Methods 0.000 claims abstract description 7
- 238000012423 maintenance Methods 0.000 claims abstract description 4
- 238000001514 detection method Methods 0.000 claims description 9
- 238000005259 measurement Methods 0.000 claims description 3
- 239000013589 supplement Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 239000000463 material Substances 0.000 abstract description 3
- 238000009434 installation Methods 0.000 abstract 1
- 230000001681 protective effect Effects 0.000 description 7
- 230000002950 deficient Effects 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a method for processing the broken pile defect of a precast pile in a weak soil area, which relates to the technical field of civil construction and comprises the following steps: A. pile position measuring; B. manually digging a hole; C. artificial red brick protecting wall; D. breaking the pile body manually; E. detecting small strain; F. lengthening a steel reinforcement cage; G. pouring concrete; H. maintenance, adopt artifical excavation, artifical shoring, can avoid loaded down with trivial details processes such as mechanical equipment handling, installation, the time is short, and the place requires lowly. The invention completely eliminates the fracture part of the original precast pile, adopts high-grade concrete to replace the fracture surface to the pile body of the designed standard section, can strictly lengthen the reinforcement cage according to the standard requirement, has controllable quality, can meet the related mechanical property requirement, does not need to design the pile repairing point position, does not need to change the structure of the bottom plate, saves the related materials and manpower, and has lower manufacturing cost.
Description
Technical Field
The invention relates to the technical field of civil engineering construction, in particular to a method for treating a broken precast pile defect in a weak land area.
Background
Due to the fact that prefabricated piles are lower in cost and higher in construction speed than cast-in-place piles, prefabricated pile foundations are widely applied, but certain pile breaking risks exist when the prefabricated pile foundations are adopted in weak soil. The main reasons for forming the broken pile defective pile by the precast pile are as follows:
1. the soil condition is poor, silt and mucky soil mostly exist in the foundation pit depth range of 2 times of the excavation depth, creeks exist locally, and the filling and replacement are incomplete;
2. the excavation scheme and the operation are wrong, in the excavation process, a heavy vehicle rolls at the same position for multiple times to extrude and offset the pile head, in the excavation process, one-time excavation is performed to the bottom, no layered excavation is performed, and the slope soil pressure is large to cause slippage;
3. the soil-squeezing stress is damaged, a large amount of precast piles are pressed in a short time to generate huge soil-squeezing stress, and the pile foundation with poor lateral resistance is damaged;
4. the elevation of the pile top is not constructed in place, so that a high-position pile is formed, the cantilever of the high-position pile is too long, and once the high-position pile is disturbed, the high-position pile is damaged probably;
5. the pile foundation is poor in construction quality, the pile body is poor in strength, and the connection welding between two sections of piles is poor.
The main influence of the broken pile defect pile is as follows: a. the construction period influence: the prefabricated pile machine cannot be constructed, and the key working procedures of at least 9 days are influenced by 1 pile constructed by the conventional cast-in-place pile machine; b. quality impact: more defective piles are not processed or the processing quality is poor, so that the safety of the main structure is greatly influenced.
Therefore, it is necessary to invent a method for treating the pile breaking defects of precast piles in weak soil areas to solve the above problems.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a method for treating the broken pile defect of a precast pile in a soft soil area.
(II) technical scheme
In order to achieve the purpose, the invention is realized by the following technical scheme: a method for processing the broken pile defect of a precast pile in a weak soil area comprises the following steps:
A. pile position measurement: determining the original position of the broken pile by a field technician;
B. manually digging a hole: d +600mm round hole excavation is carried out downwards at the pile breaking position, and 20 cm is excavated downwards;
C. and (3) manual red brick wall protection: placing a circle of red bricks with good quality on the side wall of the round hole to enable the circle of red bricks to form a round protection wall;
D. breaking the pile body at the artificial broken position: in the process of downward digging, when meeting the pile body of the original precast pile, carrying out end-to-end breaking operation;
E. and (3) small strain detection: manually digging to a position 1 m above a fracture surface, stopping digging, performing floating treatment on the fracture, performing small strain detection, and performing the next process after the detection is qualified;
F. lengthening a steel reinforcement cage: connecting the reinforcement cage with the original prefabricated pile reinforcement cage by adopting a design convention;
G. pouring concrete: pouring the reinforcement cage by adopting high-grade concrete to form a new precast pile;
H. and (5) maintenance: and curing the poured concrete for 3 days, and then performing bottom plate steel bar binding construction.
Optionally, in the step C, the red brick circular retaining wall is dug every 20 cm, and the process is repeated.
Optionally, in the above steps, the user needs to calculate the thickness, specification and the like of the red brick retaining wall according to the actual soil layer parameters, and can use the red brick retaining wall after confirming safety.
Optionally, the above steps may also be performed by using a steel casing to protect the wall, in addition to the red brick.
Optionally, in the above steps, under the condition that manual hole digging and pile extension cannot be performed, a bored pile is grasped to fill the pile.
Optionally, if the construction period is short and the load of the pile breaking part relative to the upper part is not large, a reserved bottom plate hole can be adopted, and anchor rod pile construction is performed in the later stage.
(III) advantageous effects
The invention provides a method for processing the broken pile defect of a precast pile in a soft soil area, which has the following beneficial effects:
(1) the invention adopts manual excavation and manual support, can avoid complicated procedures such as lifting and mounting of mechanical equipment, and has short time and low site requirement;
(2) the invention eliminates all the fracture parts of the original precast pile, adopts high-grade concrete to replace fracture surfaces to the pile body of the designed standard section, and the reinforcement cage can be lengthened strictly according to the standard requirement, has controllable quality and can meet the relevant mechanical property requirement;
(3) the invention does not need to design a pile repairing point position, does not need to change the structure of the bottom plate, saves related materials and manpower, and has lower manufacturing cost.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
A method for processing the broken pile defect of a precast pile in a weak soil area comprises the following steps:
A. pile position measurement: determining the original position of the broken pile by a field technician;
B. manually digging a hole: d +600mm round hole excavation is carried out downwards at the pile breaking position, and 20 cm is excavated downwards;
C. and (3) manual red brick wall protection: placing a circle of red bricks with good quality on the side wall of the circular hole, so that the circle of red bricks forms a circular protective wall, digging 20 centimeters below the circular protective wall of the red bricks, and repeating the steps, wherein a user needs to calculate the thickness, the specification and the like of the red brick protective wall according to actual soil layer parameters to confirm that the red brick protective wall can be used after safety (except the red brick protective wall, a steel protective cylinder protective wall can also be used);
D. breaking the pile body at the artificial broken position: in the process of downward digging, when meeting the pile body of the original precast pile, carrying out end-to-end breaking operation;
E. and (3) small strain detection: manually digging to a position 1 m above a fracture surface, stopping digging, performing floating treatment on the fracture, performing small strain detection, and performing the next process after the detection is qualified;
F. lengthening a steel reinforcement cage: connecting the reinforcement cage with the original prefabricated pile reinforcement cage by adopting a design convention;
G. pouring concrete: pouring the reinforcement cage by adopting high-grade concrete to form a new precast pile;
H. and (5) maintenance: and curing the poured concrete for 3 days, and then performing bottom plate steel bar binding construction.
And (3) treating the broken pile:
1. manual hole digging and pile splicing treatment: and (3) adopting a red brick retaining wall or a steel retaining cylinder retaining wall, manually excavating to the fracture part (the excavation diameter is 1.2 m) of the in-situ pile, and performing concrete and steel reinforcement cage construction according to design requirements.
2. Filling the bored pile: under the condition that manual hole digging and pile splicing can not be carried out, the bored pile is tightly grasped to fill the pile.
3. Pile repairing of the anchor rod pile: if the construction period is tight, and the load of the upper part of the broken pile part of the original precast pile is not large, reserved bottom plate holes can be adopted, and anchor pile construction is carried out at the later stage.
Pre-controlling the pile breaking risk in the soft soil area:
1. the main building adopts cast-in-place piles, and the ground depot adopts tubular piles and square piles, so that a certain amount of soil squeezing stress is reduced, and the lateral resistance of a pile body is improved.
2. In the field, rivers and creeks must be cleaned in place and completely filled, and soil treatment is required in advance for the regions with extremely poor soil quality.
3. During construction, layered excavation is strictly carried out, the layered horizontal distance is enlarged as much as possible under the condition of a condition, and the advancing route of a heavy vehicle needs to be reinforced.
4. The construction speed, the plane range and the welding quality of the precast pile are controlled, and meanwhile, necessary stress release holes are arranged (the stress of the precast pile is consumed for about 10 days generally).
5. All piles must be driven to the designed elevation strictly according to the requirements and are not undersent.
The invention adopts manual excavation and manual support, can avoid complicated processes of hoisting and mounting of mechanical equipment and the like, has short time and low site requirement, completely eliminates the fracture part of the original precast pile, adopts high-grade concrete to replace the fracture surface to the pile body of the designed standard section, can strictly lengthen the reinforcement cage according to the standard requirement, has controllable quality, can meet the relevant mechanical property requirement, simultaneously does not need to design a pile repairing point position, does not need to change the structure of a bottom plate, saves the relevant materials and labor, and has lower manufacturing cost.
It is noted that in the present disclosure, unless otherwise explicitly specified or limited, a first feature "on" or "under" a second feature may be directly contacted with the first and second features, or indirectly contacted with the first and second features through intervening media. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. A method for processing the broken pile defect of a precast pile in a weak soil area is characterized by comprising the following steps:
A. pile position measurement: determining the original position of the broken pile by a field technician;
B. manually digging a hole: d +600mm round hole excavation is carried out downwards at the pile breaking position, and 20 cm is excavated downwards;
C. and (3) manual red brick wall protection: placing a circle of red bricks with good quality on the side wall of the round hole to enable the circle of red bricks to form a round protection wall;
D. breaking the pile body at the artificial broken position: in the process of downward digging, when meeting the pile body of the original precast pile, carrying out end-to-end breaking operation;
E. and (3) small strain detection: manually digging to a position 1 m above a fracture surface, stopping digging, performing floating treatment on the fracture, performing small strain detection, and performing the next process after the detection is qualified;
F. lengthening a steel reinforcement cage: connecting the reinforcement cage with the original prefabricated pile reinforcement cage by adopting a design convention;
G. pouring concrete: pouring the reinforcement cage by adopting high-grade concrete to form a new precast pile;
H. and (5) maintenance: and curing the poured concrete for 3 days, and then performing bottom plate steel bar binding construction.
2. The method for processing the pile breaking defect of the precast pile in the weak soil area as claimed in claim 1, wherein the red brick circular retaining wall is dug every 20 cm in the step C, and the process is repeated.
3. The method as claimed in claim 1, wherein the user calculates the thickness and specification of the red brick retaining wall according to the actual soil layer parameters, and confirms that the pile can be used after safety.
4. The method for treating the broken pile defect of the precast pile in the weak soil area as claimed in claim 1, wherein: besides red brick retaining walls, steel retaining cylinder retaining walls can be adopted in the steps.
5. The method for treating the broken pile defect of the precast pile in the weak soil area as claimed in claim 1, wherein: in the steps, under the condition that manual hole digging and pile splicing cannot be carried out, the bored pile is grasped to supplement the pile.
6. The method for processing the pile breaking defect of the precast pile in the weak soil area as claimed in claim 1, wherein if the construction period is relatively tight and the load of the pile breaking part relative to the upper part is not large in the above steps, a reserved bottom plate hole is adopted, and anchor rod pile construction is carried out later.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111592920.3A CN114293600A (en) | 2021-12-22 | 2021-12-22 | Method for processing broken pile defect of precast pile in weak soil area |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111592920.3A CN114293600A (en) | 2021-12-22 | 2021-12-22 | Method for processing broken pile defect of precast pile in weak soil area |
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| CN114293600A true CN114293600A (en) | 2022-04-08 |
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| CN202111592920.3A Pending CN114293600A (en) | 2021-12-22 | 2021-12-22 | Method for processing broken pile defect of precast pile in weak soil area |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115094880A (en) * | 2022-08-11 | 2022-09-23 | 广东省建筑设计研究院有限公司 | Reinforcing method for fracture of support cast-in-place pile in pile anchor support structure |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003342951A (en) * | 2002-05-30 | 2003-12-03 | Yamada Yuka | Construction method for treatment of pile head of cast- in-place pile, and cushion material and concrete destroying device for use in the same |
| CN101220593A (en) * | 2008-01-25 | 2008-07-16 | 东莞市桦业土木基础工程有限公司 | Fastening method of post-treating pipe pile break with pre-stress pipe pile construction |
| CN103911991A (en) * | 2014-03-17 | 2014-07-09 | 振业建设集团有限公司 | Quick pile-splicing construction method for prestressed concrete PS (poly styrene) pile fracture |
| CN108442370A (en) * | 2017-02-16 | 2018-08-24 | 五冶集团上海有限公司 | The broken pile connector processing method of prestressed concrete pipe pile |
-
2021
- 2021-12-22 CN CN202111592920.3A patent/CN114293600A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003342951A (en) * | 2002-05-30 | 2003-12-03 | Yamada Yuka | Construction method for treatment of pile head of cast- in-place pile, and cushion material and concrete destroying device for use in the same |
| CN101220593A (en) * | 2008-01-25 | 2008-07-16 | 东莞市桦业土木基础工程有限公司 | Fastening method of post-treating pipe pile break with pre-stress pipe pile construction |
| CN103911991A (en) * | 2014-03-17 | 2014-07-09 | 振业建设集团有限公司 | Quick pile-splicing construction method for prestressed concrete PS (poly styrene) pile fracture |
| CN108442370A (en) * | 2017-02-16 | 2018-08-24 | 五冶集团上海有限公司 | The broken pile connector processing method of prestressed concrete pipe pile |
Non-Patent Citations (2)
| Title |
|---|
| 滕延京: "《地基基础技术发展与应用-中国建筑学会地基基础分会2004年学术年会论文集》", 知识产权出版社, pages: 531 - 533 * |
| 黄茂兴: "探讨不良地质条件下桩基工程接桩的施工方案", 《中国高新技术企业》, no. 24, 31 December 2010 (2010-12-31), pages 3 - 5 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115094880A (en) * | 2022-08-11 | 2022-09-23 | 广东省建筑设计研究院有限公司 | Reinforcing method for fracture of support cast-in-place pile in pile anchor support structure |
| CN115094880B (en) * | 2022-08-11 | 2023-11-17 | 广东省建筑设计研究院有限公司 | Reinforcing method for fracture of support filling pile in pile anchor support structure |
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Application publication date: 20220408 |