CN107700478A - Work transmission line bored concrete pile single-pile foundation one-shot forming construction method - Google Patents
Work transmission line bored concrete pile single-pile foundation one-shot forming construction method Download PDFInfo
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- CN107700478A CN107700478A CN201710916574.7A CN201710916574A CN107700478A CN 107700478 A CN107700478 A CN 107700478A CN 201710916574 A CN201710916574 A CN 201710916574A CN 107700478 A CN107700478 A CN 107700478A
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Classifications
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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
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/36—Concrete or concrete-like piles cast in position ; Apparatus for making same making without use of mouldpipes or other moulds
-
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/42—Foundations for poles, masts or chimneys
Abstract
The present invention relates to a kind of work transmission line bored concrete pile single-pile foundation one-shot forming construction method, it is characterised in that：The position of bored concrete pile is intended in positioning, realizes positioning point hole；Grooving is carried out to a point hole for positioning, forms pore-forming；To carrying out taking out slag borehole cleaning in pore-forming；Prefabricated steel reinforcement cage is attached in pore-forming；Conduit is buried in pore-forming and steel reinforcement cage；The 4th）When pore-forming in step is single pile hole, it can be detected, be checked and accepted after concrete perfusion, maintenance in hole；And the 4th）Pore-forming in step for multiple single pile holes side by side when, in each hole after concrete perfusion, maintenance, pile crown is cleared up, and detect, then carries out the group mould of cushion cap and pour, can be carried out an acceptance inspection after maintenance；Construction method of the present invention is avoided that secondary excavation and problem of groundwater, meets the continuous placing requirement of concrete, greatly shortens construction period, reduces chisel pile crown waste pollution, improves efficiency of construction, remarkable in economical benefits.
Description
Technical field：
The present invention relates to a kind of work transmission line bored concrete pile single-pile foundation one-shot forming construction method.
Background technology：
Huainan~Nanjing~Shanghai engineering circuit engineering（8 marks）, landform ratio is level land 15.4% along the line, network of waterways mire 84.6%,
Geotechnical Engineering condition along the line is poor, and underground water buried depth is shallower, and so as to cause pile foundation needs are secondary to cast, workmen is more, work
Sequence is miscellaneous, reduces the progress of engineering.
The content of the invention：
It is an object of the invention to provide a kind of work transmission line bored concrete pile single-pile foundation one-shot forming construction method, the transmission of electricity
Line project bored concrete pile single-pile foundation one-shot forming construction method is reasonable in design, is advantageously implemented and once casts, and improves engineering and enters
Degree.
A kind of work transmission line bored concrete pile single-pile foundation one-shot forming construction method of the present invention, it is characterised in that：
1）, positioning intend bored concrete pile position, realize positioning point hole；
2）, to positioning point hole carry out grooving, formed pore-forming；
3）, to carrying out taking out slag borehole cleaning in pore-forming；
4）, prefabricated steel reinforcement cage is attached in pore-forming；
5）, in pore-forming and steel reinforcement cage bury conduit；
6）, the 4th）When pore-forming in step is single pile hole, it can be detected, be checked and accepted after concrete perfusion, maintenance in hole；
And the 4th）Pore-forming in step for multiple single pile holes side by side when, in each hole after concrete perfusion, maintenance, pile crown is carried out
Cleaning, and detect, then carry out the group mould of cushion cap and pour, can be carried out an acceptance inspection after maintenance；
7）Above-mentioned concrete material, cement：Using 42.5 grades of Portland cements；Building stones：5~25mm of particle diameter, yellow ground：Using
Middle sand；Above-mentioned concrete charging stirring order is stone → cement → yellow ground；Mixing time control per tray concrete 90-
120s。
Further, pile machine equipment mill-separator width should be by improving, and installs riser guide feed hopper, casting process additional
Without secondary mobile stake machine board, bench structure can ensure construction speed, quality.
Further, before single pile is cast in installation form and extracts whole conduits, the mud that is unearthed is cleaned twice, and will cast
Highly exceed nature ground 0.5m, cleaned using clear water, it is ensured that after remaining laitance and mud, charging for the first time uses mortar.
And during being cast in exposed portion, accomplish to vibrate in place, to reach construction process requirement and concrete strength requirement.
Further, when pile concrete is cast more than three points of two depth, mounting foot bolt, foundation bolt is suspended in base
In hole, foundation bolt is welded on board crossbeam and steel reinforcement cage using reinforcing bar brachycephaly, it is ensured that foundation bolt group is not in shake
It is dynamic.Confirm each portion's size of foundation bolt after concrete is cast to foot bolt fastening plate, then with theodolite, it is ensured that lower margin spiral shell
Effective control of bolt group physical dimension, ensure that the concrete continuous duration of pouring meets to require.
Further, above-mentioned concrete stirring is loaded using two JZS-350 type drum-type concrete mixers and 650 types
Machine；The emergency generator of the generator and a 30kW not less than 60kW is can also configure at the construction field (site).
Further, an above-mentioned clump of piles, single pile are connected using foundation bolt and steel tower.
Further, above-mentioned bored concrete pile single-pile foundation stake diameter is more than 2m, stake depth 15m, in single-pile foundation pattern concrete
Construction joint must not be stayed, does not allow mud to remain, in place, wherein single-pile foundation side measures 8357 cubes to foundation bolt group once mounting
Rice.
Construction method of the present invention is avoided that secondary excavation and problem of groundwater, meets the continuous placing requirement of concrete, pole
It is big to shorten construction period, chisel pile crown waste pollution is reduced, improves efficiency of construction, remarkable in economical benefits.
Brief description of the drawings：
Fig. 1 is multi-column pier foundation organigram；
Fig. 2 is single-pile foundation organigram；
Fig. 3 is bored concrete pile foundation construction flow chart.
Embodiment：
The inventive method is described in further detail with reference to embodiment.It should be strongly noted that the guarantor of the present invention
Shield scope should include but is not limited to the technology contents disclosed in the present embodiment.
A kind of work transmission line bored concrete pile single-pile foundation one-shot forming construction method of the present invention, its specific steps：
1）, positioning intend bored concrete pile position, realize positioning point hole；
2）, to positioning point hole carry out grooving, formed pore-forming；
3）, to carrying out taking out slag borehole cleaning in pore-forming；
4）, prefabricated steel reinforcement cage is attached in pore-forming；
5）, in pore-forming and steel reinforcement cage bury conduit；
6）, the 4th）When pore-forming in step is single pile hole, it can be detected, be checked and accepted after concrete perfusion, maintenance in hole；
And the 4th）Pore-forming in step for multiple single pile holes side by side when, in each hole after concrete perfusion, maintenance, pile crown is carried out
Cleaning, and detect, then carry out the group mould of cushion cap and pour, can be carried out an acceptance inspection after maintenance；
Above-mentioned concrete material, cement：Using 42.5 grades of Portland cements；Building stones：5~25mm of particle diameter, yellow ground：In
Sand；Above-mentioned concrete charging stirring order is stone → cement → yellow ground；Mixing time control per tray concrete 90-
120s。
Further, pile machine equipment mill-separator width should be by improving, and installs riser guide feed hopper, casting process additional
Without secondary mobile stake machine board, bench structure can ensure construction speed, quality.
Further, before single pile is cast in installation form and extracts whole conduits, the mud that is unearthed is cleaned twice, and will cast
Highly exceed nature ground 0.5m, cleaned using clear water, it is ensured that after remaining laitance and mud, charging for the first time uses mortar.
And during being cast in exposed portion, accomplish to vibrate in place, to reach construction process requirement and concrete strength requirement.
8）Further, when pile concrete is cast more than three points of two depth, mounting foot bolt, foundation bolt is suspended in
In foundation ditch, foundation bolt is welded on board crossbeam and steel reinforcement cage using reinforcing bar brachycephaly, it is ensured that foundation bolt group is not in
Rock.Confirm each portion's size of foundation bolt after concrete is cast to foot bolt fastening plate, then with theodolite, it is ensured that lower margin
Effective control of bolt group physical dimension, ensure that the concrete continuous duration of pouring meets to require.
Further, above-mentioned concrete stirring is loaded using two JZS-350 type drum-type concrete mixers and 650 types
Machine；The emergency generator of the generator and a 30kW not less than 60kW is can also configure at the construction field (site).
Further, an above-mentioned clump of piles, single pile are connected using foundation bolt and steel tower.
Further, above-mentioned bored concrete pile single-pile foundation stake diameter is more than 2m, stake depth 15m, in single-pile foundation pattern concrete
Construction joint must not be stayed, does not allow mud to remain, in place, wherein single-pile foundation side measures 8357 cubes to foundation bolt group once mounting
Rice.
Further, the underwater pile body of above-mentioned bored concrete pile single-pile foundation point and foundation bolt part of appearing, two parts are separately applied
Work, underwater pile body part is first cast, after curing period arrives, then carry out chisel pile crown, group mould, mounting and adjusting foundation bolt group, finally
Carry out casting part concrete of appearing.
1. project profile
Huainan~Nanjing~Shanghai engineering circuit engineering is risen from Huainan 1000kV transformer stations, through Nanjing northern station, Taizhou station, Suzhou
To stand, terminate in the western 1000kV transformer stations in Shanghai, this bid section line route is located in the middle part of Jiangsu Province by area, and geomorphic unit is Plain,
Shared basic 60 bases of this bid section circuit, wherein each 30 base of a clump of piles, single pile, are connected using foundation bolt with steel tower
2. the proposition of single-pile foundation one-shot forming technique
This bid section bored concrete pile single-pile foundation stake footpath is big, typically deep typically in 15m or so in more than 2m, stake.Single-pile foundation pattern is mixed
Coagulate native requirement must not stay construction joint, do not allow mud to remain, foundation bolt group once mounting in place, this just to cast construction when
Between and mode have strict requirements, substantially increase constructional difficulties.The total side's amount 25934.7m3 in this bid section basis, wherein single pile
Square foundation amount 8357m3, year-on-year bored concrete pile multi-column pier foundation concrete square amount are big.Though single-pile foundation concrete, which is cast, can be used commodity
Concrete, but this bid section approach River Network, commerical ready-mixed concrete transport routes are limited, therefore the concrete of many tower positions in scene pours
System need to use artificial stirring, cause concrete Quality Control difficulty to increase, and the personnel of " double-shift work " must be used during casting
Input, workmen's operation intensity are big.
The work transmission line bored concrete pile underwater pile body of single-pile foundation point and foundation bolt part of appearing separately are constructed, and are first cast
Underwater pile body part, after curing period arrives, then carries out chisel pile crown, group mould, mounting and adjusting foundation bolt group, finally carries out casting dew
Concrete is divided on head.
In view of lifting construction technological level, ensures construction speed and construction quality, reduces the purpose of operating expenses, reach and take
The effect of preferably economic, environmental protection and social benefit is obtained, therefore using once during bored concrete pile single-pile foundation concrete is cast
The technique of shaping.
3. the one-time formed key element of single-pile foundation
Requirement of 3.1 single-pile foundations to board width
Bored concrete pile single-pile foundation minimum diameter 1.8m, maximum gauge 2.4m, traditional pile machine equipment is simple in construction, is mostly tripod knot
Structure, board can not meet to require.It need to cast to ground, be constructed again after mobile machine console, plus installation form, accurate adjustment lower margin
The operation procedures such as bolt, cleaning laitance, whole activity duration length, quality influences big during being cast on concrete.According to engineering
Feature, pile machine equipment mill-separator width is improved, after installing riser guide feed hopper additional, casting process is without secondary mobile stake machine machine
Platform, bench structure can ensure construction speed, quality.
3.2 single-pile foundation bases are appeared part mud residual treatment
Bored concrete pile single-pile foundation appear part to cast technique different from snag, be not provided with conduit, laitance and mud are untreated
Totally, just easily there is surface porosity phenomenon in the leg surface of basic part of appearing, and intensity does not reach code requirement, through rain drop erosion
Occurs dew muscle afterwards.Thereby it is ensured that laitance and mud conditioning are clean, it is to ensure one of concrete quality critical process.According to analysis,
Installation form and before extracting whole conduits, cleans the mud that is unearthed twice, and will cast height and exceed nature ground 0.5m, using clear
Water cleans, it is ensured that after remaining laitance and mud, charging for the first time uses mortar.And during being cast in exposed portion, accomplish
Vibrate in place.So, construction process requirement and concrete strength requirement be can reach.
3.3 foundation bolt physical dimensions control and the continuous cast of concrete
This engineering foundation bolt is all using 16 or 12 foundation bolt groups, weight weight, hang firm foundation bolt group be not easy,
Physical dimension control is difficult, activity duration length.Ensure that concreting can continuously construct and occur without broken pile, each portion's size Control can
Meet code requirement, it is critical that when pile concrete is cast more than three points of two depth, mounting foot bolt, foundation bolt hangs
It is hung in foundation ditch, foundation bolt is welded on board crossbeam and steel reinforcement cage using reinforcing bar brachycephaly, it is ensured that foundation bolt group will not
Rock.Confirm each portion's size of foundation bolt after concrete is cast to foot bolt fastening plate, then with theodolite, it is ensured that
Effective control of foundation bolt group physical dimension, and ensure that the concrete continuous duration of pouring meets to require.
4. the one-time formed quality control of single-pile foundation
4.1 mixing plants and construction power supply
Configure two JZS-350 type drum-type concrete mixers；Configure a 650 type loading machines；As job site power supply capacity without
What method satisfaction construction needs and non-transformer point accessed, the generator not less than 60kW should be configured, while scene should be cast each
It is equipped with 30kW emergency generator.
4.2 metering
1）The match ratio provided according to testing inspection center, prepared by often disk weight ratio.
2）Cement, sand, building stones must per car weigh and the record that weighs, within ± 3%, cement error exists aggregate error
Within ± 2%.
3）Various metering devices answer periodic check, and check of zero should be carried out before each use, keep accurate measurement.
4）It is equipped with concrete slump cylinder, it is necessary to meet specification and design requirement, it is strict to control the concrete ratio of mud.
5）When chance rainy day or moisture content have significant change, moisture content detection number should be increased, and adjust water and aggregate in time
Dosage.
4.3 material
1）Cement：Using 42.5 grades of Portland cements.
2）Building stones：5~25mm of particle diameter is advisable, and maximum particle diameter is not more than 31.5mm.
3）Yellow ground：Sand in must using, forbid to use sea sand.
4.4 stirring
1）Loading sequence：Stone → cement → yellow ground.
2）Slump control is controlled in 90-120s in 200 ± 20mm, the mixing time per tray concrete.
4.5 concrete mixing quality surveillance and control measures
1）The raw material of concrete stirring, it is necessary to applied for checking and examination by inspection lot, the qualified rear of material can be used, and forbid defective material to be used for work
Cheng Shang, and to accomplish that daytime prepares enough material as far as possible, avoid night from feeding, and the quality of raw material can not be ensured, and deficiency of stocking up
Forbid cast construction.
2）In Situ Concrete stirring strictly must carry out feeding stirring, project management department administrative staff and full-time staff, prison by match ratio
Reason personnel once have found violations of rules and regulations, have the right to order to stop work, and analyze reason, and punish by the quality system of rewards and penalties.
3）In Situ Concrete stirs, and material must weigh metering, establishes metering and records machine account.Project management department will set special messenger to In Situ Concrete
Stirring carries out whole process supervision, to concrete slump and progress grab sample of weighing, and is equipped with a number of die trial, random inspection
Concrete inherent quality, to ensure In Situ Concrete mixing quality.
4）This engineering single-pile foundation side amount is larger, and the in-situ casting time continues longer, should configure the construction with double-shift work
Organizational strength.
5）The project management department personnel that take personal charge of the shift whole should instruct and tracking entirely casts process, by " with enter it is same go out " requirement, guard
Cast overall process.
5. the one-time formed performance analysis of single-pile foundation
This bid section implements that bored concrete pile single pile is one-time formed casts mode, effectively raises the progress of foundation construction.This bid section
Single pile concrete cast and all can disposably complete, plus the maintenance work in later stage, single total construction period control of base was on 10 days left sides
The right side, the secondary mode cast compared with routine substantially increase the progress and efficiency of engineering.In terms of workmen, due to not relating to
And the chisel item such as stake, without secondary construction of marching into the arena, reduce the use of personnel, saved construction cost, obtain preferably economy,
Environmental protection and social benefit.
6. suggest
It is recommended that basic ride out designs more than more than 2m and do not use single-pile foundation, a casting forming technique is difficult to realize, is applied
Model sheetinstallat during work, the adjustment of foundation bolt precision can not install in advance, and concrete continuous is cast the time and cannot be guaranteed, and
Feeding is difficult, and mud such as is not easy to discharge at the drawback during underwater portion concrete is cast.
7. advantage
According to it was verified that the shaping of single pile one-time-concreting is avoided that secondary excavation and problem of groundwater, mould using with batch concrete
Slab supporting and pile crown maintenance measure are simple, also foundation bolt physical dimension can effectively be controlled, meet the continuous placing of concrete
It is required that can greatly shorten construction period, chisel pile crown waste pollution is reduced, improves efficiency of construction, remarkable in economical benefits.
The foregoing is only presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification, it should all belong to the covering scope of the present invention.
Claims (7)
- A kind of 1. work transmission line bored concrete pile single-pile foundation one-shot forming construction method, it is characterised in that：1）, positioning intend bored concrete pile position, realize positioning point hole；2）, to positioning point hole carry out grooving, formed pore-forming；3）, to carrying out taking out slag borehole cleaning in pore-forming；4）, prefabricated steel reinforcement cage is attached in pore-forming；5）, in pore-forming and steel reinforcement cage bury conduit；6), the 4th）When pore-forming in step is single pile hole, it can be detected, be checked and accepted after concrete perfusion, maintenance in hole； And the 4th）Pore-forming in step for multiple single pile holes side by side when, in each hole after concrete perfusion, maintenance, pile crown is carried out Cleaning, and detect, then carry out the group mould of cushion cap and pour, can be carried out an acceptance inspection after maintenance；7), above-mentioned concrete material, cement：Using 42.5 grades of Portland cements；Building stones：5~25mm of particle diameter, yellow ground：Adopt With middle sand；Above-mentioned concrete charging stirring order is stone → cement → yellow ground；Mixing time control per tray concrete exists 90—120s。
- 2. work transmission line bored concrete pile single-pile foundation one-shot forming construction method according to claim 1, its feature exist In：Before the single pile is cast in installation form and the whole conduits of extraction, the mud that is unearthed is cleaned twice, and will be cast height and be exceeded certainly Right ground 0.5m, is cleaned using clear water, it is ensured that after remaining laitance and mud, charging for the first time uses mortar；And in exposed division Divide during casting, accomplish to vibrate in place, to reach construction process requirement and concrete strength requirement.
- 3. work transmission line bored concrete pile single-pile foundation one-shot forming construction method according to claim 1, its feature exist In：When the pile concrete is cast more than three points of two depth, mounting foot bolt, foundation bolt is suspended in foundation ditch, is used Foundation bolt is welded on board crossbeam and steel reinforcement cage by reinforcing bar brachycephaly, it is ensured that foundation bolt group is not in rock；Treat coagulation After soil is cast to foot bolt fastening plate, then with theodolite confirm each portion's size of foundation bolt, it is ensured that foundation bolt group geometry Effective control of size, ensure that the concrete continuous duration of pouring meets to require.
- 4. work transmission line bored concrete pile single-pile foundation one-shot forming construction method according to claim 1, its feature exist In：The pile machine equipment mill-separator width is adjusted, and installs riser guide feed hopper additional, and casting process is without secondary shifting Dynamic stake machine board, bench structure can ensure construction speed, quality.
- 5. work transmission line bored concrete pile single-pile foundation one-shot forming construction method according to claim 1, its feature exist In：The concrete stirring uses two JZS-350 type drum-type concrete mixers and a 650 type loading machines；At the construction field (site) It can also configure the emergency generator of the generator and a 30kW not less than 60kW.
- 6. work transmission line bored concrete pile single-pile foundation one-shot forming construction method according to claim 1, its feature exist In：The clump of piles, single pile are connected using foundation bolt and steel tower.
- 7. work transmission line bored concrete pile single-pile foundation one-shot forming construction method according to claim 1, its feature exist In：The bored concrete pile single-pile foundation stake diameter is more than 2m, stake depth 15m, must not stay construction joint in single-pile foundation pattern concrete, no Mud is allowed to remain, in place, wherein single-pile foundation side measures 8357 cubic metres to foundation bolt group once mounting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710916574.7A CN107700478A (en) | 2017-09-30 | 2017-09-30 | Work transmission line bored concrete pile single-pile foundation one-shot forming construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201710916574.7A CN107700478A (en) | 2017-09-30 | 2017-09-30 | Work transmission line bored concrete pile single-pile foundation one-shot forming construction method |
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| CN201710916574.7A Pending CN107700478A (en) | 2017-09-30 | 2017-09-30 | Work transmission line bored concrete pile single-pile foundation one-shot forming construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114277780A (en) * | 2021-12-25 | 2022-04-05 | 深圳市蛇口招商港湾工程有限公司 | Construction method of marine soft soil foundation structure |
| CN115045268A (en) * | 2022-07-08 | 2022-09-13 | 上海隧道工程有限公司 | Construction method of ultra-deep and ultra-thick underground continuous wall |
-
2017
- 2017-09-30 CN CN201710916574.7A patent/CN107700478A/en active Pending
Non-Patent Citations (2)
| Title |
|---|
| 山西锦通工程项目管理咨询有限公司等: "《电力建设工程监理手册输电线路工程卷》", 30 November 2010, 中国电力出版社 * |
| 赵冬辉等: ""Φ3000mm大直径钻孔灌注桩施工技术浅析"", 《河南科技》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114277780A (en) * | 2021-12-25 | 2022-04-05 | 深圳市蛇口招商港湾工程有限公司 | Construction method of marine soft soil foundation structure |
| CN115045268A (en) * | 2022-07-08 | 2022-09-13 | 上海隧道工程有限公司 | Construction method of ultra-deep and ultra-thick underground continuous wall |
| CN115045268B (en) * | 2022-07-08 | 2023-09-05 | 上海隧道工程有限公司 | Construction method of ultra-deep and ultra-thick underground diaphragm wall |
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Application publication date: 20180216 |
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