CN115233756A - Cast-in-place pile defect treatment construction method - Google Patents
Cast-in-place pile defect treatment construction method Download PDFInfo
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- CN115233756A CN115233756A CN202211024483.XA CN202211024483A CN115233756A CN 115233756 A CN115233756 A CN 115233756A CN 202211024483 A CN202211024483 A CN 202211024483A CN 115233756 A CN115233756 A CN 115233756A
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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
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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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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/64—Repairing piles
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Piles And Underground Anchors (AREA)
Abstract
The invention discloses a cast-in-place pile defect treatment construction method, which comprises the following steps: monitoring the defective pile to determine the position of the pile body defect; providing a high-pressure jet grouting pile driver, carrying out jet grouting reinforcement on the defective position of the pile body, controlling the reinforcement range to be 1/4-1/2 of the pile perimeter according to the defective condition of the pile body, and controlling the reinforcement length to be greater than 1m of the upper part and the lower part of the defective position of the pile body; providing a water mill drilling machine, coring and punching the defective pile, and forming a vertical shaft with the bottom elevation lower than the defective position of the pile body; repairing the defect position; backfilling concrete in the vertical shaft; the invention enhances the construction quality and the construction efficiency.
Description
Technical Field
The invention relates to the field of pile foundation construction, in particular to a cast-in-place pile defect treatment construction method.
Background
In the construction process of the cast-in-place pile, common quality problems such as pile body concrete dispersion, pile breakage and the like easily occur due to improper operation of the working procedures, and when the cast-in-place pile is detected and judged to be an unqualified pile, methods such as grouting method reinforcement, re-construction on the original pile position, pile supplement and the like are required to be adopted for treatment. When the defect position of the pile body is buried deeply or the section is large, the grouting method is difficult to effectively ensure the treatment quality, and the secondary inspection and maintenance time is long; the original pile position is reworked again, and because the concrete strength of the pile body is high and the content of the steel bars is large, the impact drilling consumes long time and high cost, and the construction site is often limited due to the operation with slurry during impact; if the pile repairing scheme is adopted, two piles are needed to replace the original pile, so that the construction progress is slow and the cost is high. The filling pile has poor soil layer around, high water level and great difficulty in treating and repairing defects.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides a cast-in-place pile defect treatment construction method, and improves the construction efficiency and the construction quality.
In order to achieve the purpose, the technical scheme adopted by the invention comprises the following steps:
monitoring the defective pile, and determining the defective position of the pile body;
providing a high-pressure jet grouting pile driver, carrying out jet grouting reinforcement on the defective position of the pile body, controlling the reinforcement range to be 1/4-1/2 of the pile perimeter according to the defective condition of the pile body, and controlling the reinforcement length to be greater than 1m of the upper part and the lower part of the defective position of the pile body;
providing a water mill drilling machine, coring and punching the defective pile, and forming a vertical shaft with the bottom elevation lower than the defective position of the pile body;
repairing the defect position;
and backfilling concrete in the vertical shaft.
The construction method for treating the defects of the cast-in-place pile is further improved in that coring and punching are performed after the concrete reinforced by the jet grouting reaches the age.
The defect treatment construction method for the cast-in-place pile is further improved in that the water mill drilling machine further comprises a lifting system, the lifting system is erected at the pile position before coring and punching are carried out, and concrete at the pile core is taken out through the lifting system.
The defect treatment construction method of the cast-in-place pile is further improved in that before coring and punching are carried out on the defective pile, the diameter of the coring hole is determined to be larger than 80cm, and the clear distance from the edge of the coring hole to the pile steel reinforcement cage main rib is ensured to be larger than 20cm.
The defect treatment construction method for the cast-in-place pile is further improved in that when the pile core of the defective pile is punched, the bottom elevation of the vertical shaft is ensured to be below 50 m-80 cm at the position of the defect of the pile body.
The construction method for treating the defects of the cast-in-place pile is further improved in that after the defect position is repaired and before concrete is backfilled, artificial galling is carried out in the shaft.
The defect treatment construction method of the cast-in-place pile is further improved in that a reinforcement cage is erected in the shaft after artificial galling and before backfilling concrete, and a sound measuring pipe is arranged in the reinforcement cage.
The construction method for treating the defects of the cast-in-place pile is further improved in that when the concrete is backfilled, the backfilled concrete is ensured to be higher than the cored concrete by at least one concrete mark.
Compared with the prior art, the invention has the advantages that:
1. the pile body defect is sprayed and reinforced before construction, the stability of the defective pile is enhanced, and the construction safety of later-stage construction personnel in the pile body is ensured.
2. Coring and punching are performed through the water mill drilling machine, construction personnel directly enter the pile body to perform visual construction, and the repair strength of the defective pile is guaranteed.
3. And embedding the acoustic pipe, and monitoring the repaired defective pile in a later period to ensure the repairing quality of the defective pile.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1 is a process flow diagram of the construction method for defect treatment of a cast-in-place pile according to the present invention.
Detailed Description
The embodiments of the present invention are described below with reference to specific embodiments, and other advantages and effects of the present invention will be easily understood by those skilled in the art from the disclosure of the present specification. The invention is capable of other and different embodiments and of being practiced or of being carried out in various ways, and its several details are capable of modification in various respects, all without departing from the spirit and scope of the present invention.
The construction method for defect handling of a cast-in-place pile according to the present invention will be described in detail with reference to the accompanying drawings and specific examples.
Referring to fig. 1, a construction method for treating a defect of a cast-in-place pile includes
Step 1: and monitoring the defective pile to determine the defective position of the pile body.
Specifically, by ultrasonic inspection, the elevation and circumferential length at the defect location are located.
Step 2: the high-pressure jet grouting pile driver is used for jet grouting reinforcement of the defective position of the pile body, the reinforcement range is controlled to be 1/4-1/2 of the pile perimeter according to the defect condition of the pile body, the reinforcement length is greater than 1m of the upper part and the lower part of the defective position of the pile body, jet grouting reinforcement is carried out on the defective position of the pile body before construction, the stability of a defective pile is enhanced, and the construction safety of later-stage construction personnel in the pile body is guaranteed.
Specifically, coring and punching are performed after the rotary-spraying reinforced concrete reaches the age.
Specifically, a temporary slag discarding site is excavated nearby before coring and punching.
And step 3: the utility model provides a water mill rig, it is right the defective pile is got the core and is punched to form the bottom elevation and be less than the shaft of pile body defective position gets the core through the water mill rig and punches, directly gets into the pile body by constructor and carries out visual construction, has guaranteed the restoration intensity of defective pile.
Specifically, before core drilling, a steel pipe support is erected at a pile position, a pulley and a winch are installed to form a lifting system, and concrete at the pile core is taken out through the lifting system.
Specifically, before coring and punching the defective pile, the diameter of the coring hole is determined to be greater than 80cm, and the clear distance from the edge of the coring hole to the cage bars of the pile is ensured to be greater than 20cm.
Specifically, when the pile core of the defective pile is punched, the bottom elevation of the vertical shaft is ensured to be below 50-80 cm at the defective position of the pile body.
And 4, step 4: and repairing the defect position.
Specifically, the defects and the plugs are cleared by constructors, soft soil and sludge at the positions of the defects are cleared, loosening parts such as bulges, pimples, shells and layers are removed, honeycombs and loose stones are removed, the honeycomb and the loose stones are transported out through the lifting system and washed clean by water, water is not leaked, JS liquid and water are proportioned into 1.
Specifically, after repairing the defect position and before backfilling concrete, manually roughening is carried out in the vertical shaft, and guarantee is provided for subsequent erection of the reinforcement cage through manual roughening.
Specifically, after the manual galling and before backfilling concrete, a steel reinforcement cage is erected in the shaft, a sound detection pipe is arranged, and through embedding the sound detection pipe, the post-monitoring is carried out on the repaired defective pile, so that the repairing quality of the defective pile is ensured.
Specifically, set up steel reinforcement cage welding cross or rice word stiffening brace in the skeleton during steel reinforcement cage, through the overall rigidity of stiffening brace reinforcing steel reinforcement cage.
And 5: and backfilling concrete in the vertical shaft.
Specifically, when the concrete is backfilled, the backfilled concrete is guaranteed to be higher than the cored concrete by at least one concrete mark.
A process flow for coring and punching of a water mill drilling machine is as follows:
firstly, defining the diameter of coring and punching, ensuring that the diameter of the coring hole is more than 80cm, ensuring that the radial distance from the edge of the coring hole to a pile reinforcement cage main rib is more than 20cm, and marking the side line of the coring hole on the pile top ring of the defective pile;
then, a steel pipe support is erected on the pile top of the defective pile in advance, a pulley and a winch are installed to form a lifting system, a drill bit of a water mill drilling machine adopts a specification with the outer diameter of 16cm and the height of 62cm, one-time footage can reach 60cm, core taking and punching are sequentially carried out according to annular marks until a core taking surface is communicated, and the middle concrete and the peripheral concrete form a blank surface;
then, gradually breaking the middle concrete by using a crowbar, and gradually taking out the middle concrete through the lifting system;
and finally, repeating the operation until the core is drilled to the position of the defect in the vertical shaft, wherein the position is 50-80 cm lower.
It should be noted that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching the disclosure of the present specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions of the present invention, so that the present invention has no technical essence, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the present invention without affecting the efficacy and the achievable purpose of the present invention. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Although the present invention has been described with reference to a preferred embodiment, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (8)
1. A cast-in-place pile defect treatment construction method is characterized by comprising the following steps:
monitoring the defective pile to determine the position of the pile body defect;
providing a high-pressure jet grouting pile driver, carrying out jet grouting reinforcement on the defective position of the pile body, controlling the reinforcement range to be 1/4-1/2 of the pile perimeter according to the defective condition of the pile body, and controlling the reinforcement length to be greater than the upper and lower parts of the defective position of the pile body by 1m;
providing a water mill drilling machine, coring and punching the defective pile, and forming a vertical shaft with the bottom elevation lower than the defective position of the pile body;
repairing the defect position;
and backfilling concrete in the vertical shaft.
2. A cast-in-place pile defect management construction method as defined in claim 1, wherein coring and punching are performed after the concrete for jet grouting reinforcement reaches age.
3. The cast-in-place pile defect treatment construction method as claimed in claim 1, wherein the water mill drilling machine further comprises a lifting system, the lifting system is erected at the pile position before core drilling is carried out, and concrete at the pile core is taken out through the lifting system.
4. A cast-in-place pile defect management method as claimed in claim 1, wherein the diameter of the coring hole is greater than 80cm before coring and drilling the defective pile, and the clear distance between the edge of the coring hole and the pile cage bars is greater than 20cm.
5. The cast-in-place pile defect treatment construction method as claimed in claim 1, wherein when the pile core of the defective pile is punched, the bottom elevation of the vertical shaft is ensured to be below 50-80 cm at the position of the defect of the pile body.
6. A cast-in-place pile defect management construction method as claimed in claim 1, wherein after repairing the defect position and before backfilling concrete, artificial galling is performed in the shaft.
7. A cast-in-place pile defect treatment construction method as claimed in claim 6, wherein a reinforcement cage is erected in the shaft after the artificial galling and before the concrete is backfilled, and a sound measurement pipe is installed.
8. The cast-in-place pile defect management construction method as recited in claim 1, wherein the concrete is backfilled by ensuring that the backfilled concrete is higher than the cored concrete by at least one concrete mark.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211024483.XA CN115233756A (en) | 2022-08-25 | 2022-08-25 | Cast-in-place pile defect treatment construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211024483.XA CN115233756A (en) | 2022-08-25 | 2022-08-25 | Cast-in-place pile defect treatment construction method |
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| CN115233756A true CN115233756A (en) | 2022-10-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211024483.XA Pending CN115233756A (en) | 2022-08-25 | 2022-08-25 | Cast-in-place pile defect treatment construction method |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004190404A (en) * | 2002-12-13 | 2004-07-08 | Fujita Corp | Reinforcing cage for cast-in-place concrete pile |
| CN104775451A (en) * | 2014-01-15 | 2015-07-15 | 青岛市城乡建设委员会 | Rapid disposal method for diseases near road manhole |
| CN111691408A (en) * | 2020-06-22 | 2020-09-22 | 福建省华策建设集团有限公司 | Soft rock stratum rectangular slide-resistant pile construction method |
| RU2737303C1 (en) * | 2020-03-10 | 2020-11-26 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Кубанский государственный аграрный университет имени И.Т. Трубилина" | Bored pile reinforcement method |
| CN112411642A (en) * | 2020-11-13 | 2021-02-26 | 浙江杰地建筑设计有限公司 | Reinforced structure for defect treatment of large-diameter concrete cast-in-place pile and construction method |
| CN112482372A (en) * | 2020-12-02 | 2021-03-12 | 保利长大工程有限公司 | Defect repairing method for cast-in-place pile |
-
2022
- 2022-08-25 CN CN202211024483.XA patent/CN115233756A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004190404A (en) * | 2002-12-13 | 2004-07-08 | Fujita Corp | Reinforcing cage for cast-in-place concrete pile |
| CN104775451A (en) * | 2014-01-15 | 2015-07-15 | 青岛市城乡建设委员会 | Rapid disposal method for diseases near road manhole |
| RU2737303C1 (en) * | 2020-03-10 | 2020-11-26 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Кубанский государственный аграрный университет имени И.Т. Трубилина" | Bored pile reinforcement method |
| CN111691408A (en) * | 2020-06-22 | 2020-09-22 | 福建省华策建设集团有限公司 | Soft rock stratum rectangular slide-resistant pile construction method |
| CN112411642A (en) * | 2020-11-13 | 2021-02-26 | 浙江杰地建筑设计有限公司 | Reinforced structure for defect treatment of large-diameter concrete cast-in-place pile and construction method |
| CN112482372A (en) * | 2020-12-02 | 2021-03-12 | 保利长大工程有限公司 | Defect repairing method for cast-in-place pile |
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