CN1888331A - Guide pit type manual pot holing pile reinforing and underpinning method for building foundation and composite supporting pile - Google Patents
Guide pit type manual pot holing pile reinforing and underpinning method for building foundation and composite supporting pile Download PDFInfo
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- CN1888331A CN1888331A CN 200610104414 CN200610104414A CN1888331A CN 1888331 A CN1888331 A CN 1888331A CN 200610104414 CN200610104414 CN 200610104414 CN 200610104414 A CN200610104414 A CN 200610104414A CN 1888331 A CN1888331 A CN 1888331A
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Abstract
The present invention discloses a method for strengthening and underpinning existent building foundation by adopting pilot tunnel type artificial digging pile. The main principle of said method lies in that it utilizes vertical and horizontal pilot tunnel, adds the measures of lighting, ventilation, supporting and precipitation and constructs artificial digging pile under the building foundation and makes the artificial digging pile and the original building foundation implement effective connection so as to attain the goal of strengthening and underpinning existent building foundation. Said invention also provides the concrete operation steps of said method.
Description
Technical field:
The invention belongs to fixed buildings foundation construction technical field, particularly to the underpin of existing building, underpin and the rectification technology.
Background technology
Some existing building in use, because foundation soil is inhomogeneous, ground is handled not in place, pipeline or architecture enclosing leak and groundwater table rises and to cause bearing capacity of foundation slab to reduce or the immersion saturated yielding in the ground, underground chamber caves in, inside and outside inhomogeneous preloading of building or ground are subjected to the eccentric load effect, near the excavation pit building, reasons such as foundation design defectiveness or construction quality are not good enough, cause the existing building foundation soil that inhomogeneous variation or resistance to overturning reduction take place, thereby make the building foundation that differential settlement or local craze and transfiguration take place, influence its safe handling.Reinforcement means commonly used has: rotary churning pile method and pressure grout method, silent piling method, lime pile method etc.Rotary churning pile method and pressure grout method water supply volume are bigger, easily produce additional deformation, and environmental pollution is bigger, and quality also is difficult to controlled; The silent piling method then is difficult to construction if run into the calcareous concretion layer that presss from both sides in the foundation soil in shiver stone or the loess ancient soil; The lime pile method is generally in the outside, basis, and is stressed not direct, and in the time of greatly maybe can not blocking the source of water as if water content in the foundation soil, easily emplaster is softened in suction, and intensity reduces, and does not have consolidation effect.
Summary of the invention
The object of the present invention is to provide a kind of effective ways that utilize base tunnel formula hand excavated pile that the existing building basis is reinforced and underpins, propose a kind of composite supporting pile of suitable the inventive method simultaneously, to overcome the defective that exists in the prior art.
The present invention is to realize above-mentioned reinforcing purpose through the following steps for only needing to reinforce the basis that need not rectifying by jack up:
(1). the vertical base tunnel of other alternation excavation on existing building thing basis, after vertical base tunnel reaches desired depth in the building foundation the horizontal base tunnel of excavation, make the bottom surface of vertical and horizontal base tunnel form the construction working face of hand excavated pile;
(2). according to the position and the size of building foundation, determine the stake position of hand excavated pile in the base tunnel bottom surface;
(3). carry out the pore-forming operation of hand excavated pile in the base tunnel bottom surface, the dregs classification in the pore-forming is risen to ground;
(4). after predetermined bearing stratum was dug in the stake hole, stock mould was built in the outside, stake hole in horizontal base tunnel by laying bricks or stones, and reaches suitable height;
(5). adopt chute concrete perfusion in the stake hole, after concrete surface reaches the stock mould height, stop perfusion;
(6), after the concrete that has poured into reaches initial set, adopt the packing of dry pea gravel concreten plug real to the space between stake top and foundation bed, and guarantee that its intensity is not less than design strength;
(7), to the outer base tunnel of stock mould, with dirt compaction in layers backfill, and recover original ground.
The present invention is to realize the above-mentioned purpose that underpins through the following steps for the basis of need rectifying by jack up:
(1). the vertical base tunnel of other alternation excavation on existing building thing basis, after vertical base tunnel reaches desired depth in the building foundation the horizontal base tunnel of excavation, make the bottom surface of vertical and horizontal base tunnel form the construction working face of hand excavated pile;
(2). according to the position and the size of building foundation, determine the stake position of hand excavated pile in the base tunnel bottom surface;
(3). carry out the pore-forming operation of hand excavated pile in the base tunnel bottom surface, the dregs classification in the pore-forming is risen to ground;
(4). after predetermined bearing stratum was dug in the stake hole, stock mould was built in the outside, stake hole in horizontal base tunnel by laying bricks or stones, and reaches suitable height;
(5). adopt chute concrete perfusion in the stake hole, after concrete surface reaches the stock mould height, stop perfusion;
(6), after the concrete that has poured into reaches design age, adopt jack and underpin steel plate, underpin steel pipe and carry out jacking and underpin;
(7), after correction underpins and finishes, the base tunnel outer to stock mould is backfilled to the stock mould height with the dirt compaction in layers, adopts the concrete that is added with expansion agent to carry out secondary pouring again, and makes the interior concrete surface of base tunnel be higher than former basic bottom surface certain altitude;
(8), the base tunnel more than the concrete perfusion face is used dirt compaction in layers backfill again, and recover original ground.
The native ratio of the used ash of tamped backfill (lime) is 3: 7 or 2: 8 in above-mentioned two methods.
Composite supporting pile in the above-mentioned reinforcement means comprises that hole digging pile pile body (6), the stock mould (5) of hole digging pile pile body (6) upper side and the harsh concrete layer (14) of hole digging pile pile body (6) upper end that concrete constitutes constitute.
Composite supporting pile in the above-mentioned support and change method comprises that hole digging pile pile body (6), the stock mould (5) of hole digging pile pile body (6) upper side and the layer of concrete that adds expansion agent (12) of hole digging pile pile body (6) upper end that concrete constitutes constitute; And in adding the layer of concrete of expansion agent (12), be fixed with and underpin steel pipe (10).
The invention has the beneficial effects as follows: reinforcing involved in the present invention and support and change method can overcome the disadvantage of above-mentioned reinforcement means.It utilizes vertical and horizontal base tunnel, be aided with illumination, ventilation, support and dewatering measure, the hand excavated pile of under the building foundation, constructing, by former basis and the effective of hand excavated pile are connected, building load is reached on the reliable bearing stratum in ground deep by hand excavated pile, to reach the building foundation is reinforced and the purpose that underpins, and can rectify a deviation to existing building as required.This method can thoroughly be investigated thoroughly ground disease root by borehole, work progress is easy to monitoring, make basic stress direct, force path is clear and definite, do not destroy the existing building basis, can not produce additional settlement, work progress does not influence normal use substantially, environmentally safe, advantage such as construction technology is simple and reliable.Simultaneously the specially designed composite supporting pile sound construction that has stock mould of institute is constructed easily.
Description of drawings
Fig. 1 is stake of the present invention hole plan view.
Fig. 2,4, the 5th is along basic transverse cross-sectional view.
Fig. 3 is along basic longitudinal sectional drawing.
The specific embodiment
Below in conjunction with accompanying drawing to the present invention elaborate (Fig. 1 is a plan view, Fig. 2,4, the 5th, along basic transverse cross-sectional view, Fig. 3 is along basic longitudinal sectional drawing).Each label is respectively among the figure: 1. former basis (post, bar, raft foundation etc.), 2. vertical base tunnel, 3. horizontal base tunnel, 4. a hole, 5. stock mould, 6. hole digging pile pile body concrete, 7. underpin steel plate (descend), 8. underpin jack, 9. underpin steel plate (on) dirt, 12. that 10. underpins steel pipe, 11. backfills for the first time adds dirt, the 14. dry pea gravel concretens of the concrete of expansion agent, 13. backfills for the second time, the original grounds of 15. recoveries.
At original constructure base 1 (base for post, the bar base, raft foundation etc.) the vertical base tunnel 2 of other alternation excavation about 1.8～2.0m place to the foundation bed, then excavate horizontal base tunnel 3 to the precalculated position to the building foundation direction, make the construction working face in the bottom surface formation hand excavated pile stake hole 4 of vertical base tunnel 2 and horizontal base tunnel 3, utilize former basic 1 size to determine 4 positions, hole digging pile stake hole in horizontal base tunnel 3 bottom surfaces, carry out the pore-forming operation in hand excavated pile stake hole 4, dregs classification in the pore-forming is risen to ground, be aided with illumination according to strata condition, ventilate, measures such as support and precipitation, the stake end is placed predetermined bearing stratum, form stake hole 4, in the horizontal base tunnel 3 in 4 outsides, stake hole, build stock mould 5 by laying bricks or stones again, and reach suitable height, adopt chute in stake hole 4 concrete perfusion 6 to stock mould 5 end faces, abundant vibrated concrete 6 backs also make it initial set, wait for next step rectifying by jack up or reinforcing.
Reinforce the basis 1 that need not rectifying by jack up for only needing, after the concrete 6 that has poured into reaches initial set, adopt the 14 plug packings of dry pea gravel concreten real to the space between basis 1 and the pile body 6, and guarantee that its intensity is not less than design strength.Stock mould 5 outer vertical base tunnel 2 usefulness dirt 11 are carried out the compaction in layers backfill, and recover original ground 15.
Claims (5)
1, base tunnel formula hand excavated pile is characterized in that realizing through the following steps reinforcing purpose to the reinforcement means of building foundation:
(1). the vertical base tunnel of other alternation excavation on existing building thing basis, after vertical base tunnel reaches desired depth in the building foundation the horizontal base tunnel of excavation, make the bottom surface of vertical and horizontal base tunnel form the construction working face of hand excavated pile;
(2). according to the position and the size of building foundation, determine the stake position of hand excavated pile in the base tunnel bottom surface;
(3). carry out the pore-forming operation of hand excavated pile in the base tunnel bottom surface, the dregs classification in the pore-forming is risen to ground;
(4). after predetermined bearing stratum was dug in the stake hole, stock mould was built in the outside, stake hole in horizontal base tunnel by laying bricks or stones, and reaches suitable height;
(5). adopt chute concrete perfusion in the stake hole, after concrete surface reaches the stock mould height, stop perfusion;
(6), after the concrete that has poured into reaches initial set, adopt the packing of dry pea gravel concreten plug real to the space between stake top and foundation bed, and guarantee that its intensity is not less than design strength;
(7), to the outer base tunnel of stock mould, with dirt compaction in layers backfill, and recover original ground.
2, base tunnel formula hand excavated pile is characterized in that realizing through the following steps underpining the correction purpose to the support and change method of building foundation:
(1). the vertical base tunnel of other alternation excavation on existing building thing basis, after vertical base tunnel reaches desired depth in the building foundation the horizontal base tunnel of excavation, make the bottom surface of vertical and horizontal base tunnel form the construction working face of hand excavated pile;
(2). according to the position and the size of building foundation, determine the stake position of hand excavated pile in the base tunnel bottom surface;
(3). carry out the pore-forming operation of hand excavated pile in the base tunnel bottom surface, the dregs classification in the pore-forming is risen to ground;
(4). after predetermined bearing stratum was dug in the stake hole, stock mould was built in the outside, stake hole in horizontal base tunnel by laying bricks or stones, and reaches suitable height;
(5). adopt chute concrete perfusion in the stake hole, after concrete surface reaches the stock mould height, stop perfusion;
(6), after the concrete that has poured into reaches design age, adopt jack and underpin steel plate, underpin steel pipe and carry out jacking and underpin;
(7), after correction underpins and finishes, the base tunnel outer to stock mould is backfilled to the stock mould height with the dirt compaction in layers, adopts the concrete that is added with expansion agent to carry out secondary pouring again, and makes the interior concrete surface of base tunnel be higher than former basic bottom surface certain altitude;
(8), the base tunnel more than the concrete perfusion face is used dirt compaction in layers backfill again, and recover original ground.
3, method according to claim 1 and 2 is characterized in that the used dirt ratio of tamped backfill is 3: 7 or 2: 8 in above-mentioned two methods.
4, base tunnel formula hand excavated pile is characterized in that to the composite supporting pile that reinforcement means adopted of building foundation hole digging pile pile body (6), the stock mould (5) of hole digging pile pile body (6) upper side and the harsh concrete layer (14) of hole digging pile pile body (6) upper end that it is made of concrete constitute.
5, base tunnel formula hand excavated pile is characterized in that comprising that to the composite supporting pile that support and change method adopted of building foundation hole digging pile pile body (6), the stock mould (5) of hole digging pile pile body (6) upper side and the layer of concrete that adds expansion agent (12) of hole digging pile pile body (6) upper end that concrete constitutes constitute; And in adding the layer of concrete of expansion agent (12), be fixed with and underpin steel pipe (10).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101044144A CN100455731C (en) | 2006-07-28 | 2006-07-28 | Guide pit type manual pot holing pile reinforing and underpinning method for building foundation and composite supporting pile |
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| Application Number | Priority Date | Filing Date | Title |
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| CNB2006101044144A CN100455731C (en) | 2006-07-28 | 2006-07-28 | Guide pit type manual pot holing pile reinforing and underpinning method for building foundation and composite supporting pile |
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| CN1888331A true CN1888331A (en) | 2007-01-03 |
| CN100455731C CN100455731C (en) | 2009-01-28 |
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Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101787718A (en) * | 2010-02-10 | 2010-07-28 | 上海智平基础工程有限公司 | Casing construction method for reinforcing underground building and structure foundation |
| CN101338569B (en) * | 2007-07-03 | 2010-08-18 | 罗安 | Pre-stress type reinforcement method for foundation of buildings |
| CN102071679A (en) * | 2010-12-29 | 2011-05-25 | 西安建筑科技大学 | Method for consolidating existing building foundation |
| CN102444147A (en) * | 2011-11-08 | 2012-05-09 | 山西太行建设开发有限公司 | Slant correction method for building |
| CN102561721A (en) * | 2012-02-29 | 2012-07-11 | 化学工业岩土工程有限公司 | Building jacking deviation rectifying method |
| CN102817381A (en) * | 2012-08-05 | 2012-12-12 | 河北省建筑科学研究院 | Construction method of rear-embedded pile foundation |
| CN102864788A (en) * | 2012-10-19 | 2013-01-09 | 江苏华通工程检测有限公司 | Method for underpinning reinforced bridge pile foundation by bear-type static pressure cluster pile |
| CN105625420A (en) * | 2016-03-10 | 2016-06-01 | 西北综合勘察设计研究院 | Extension type manual hole digging pile support structure and construction method thereof |
| CN106121271A (en) * | 2016-07-02 | 2016-11-16 | 杭州固特建筑加固技术工程有限公司 | A kind of based on the pile splicing structure on the basis of rotary churning pile |
| CN107700521A (en) * | 2017-10-27 | 2018-02-16 | 西安建筑科技大学 | One kind is built（Structure）Build thing foundation stabilization and underpin pier and its construction method |
| CN111549784A (en) * | 2020-05-26 | 2020-08-18 | 武汉金涛岩土工程有限公司 | Construction process of foundation pit adjacent to building |
| CN111636470A (en) * | 2020-06-23 | 2020-09-08 | 贵州中建建筑科研设计院有限公司 | Structure and method for underpinning raft foundation by manually digging hole and pouring pile foundation |
| CN113833012A (en) * | 2021-10-13 | 2021-12-24 | 山东电力工程咨询院有限公司 | Pile type adjustable fan foundation and construction method |
| CN115305908A (en) * | 2022-07-25 | 2022-11-08 | 甘肃土木工程科学研究院有限公司 | Pit type static pressure grouting steel pipe pile guide pit backfilling construction process |
Family Cites Families (3)
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| CN1123353A (en) * | 1994-11-19 | 1996-05-29 | 唐殿峰 | Correction and reinforcing method for inclined house |
| CN1260424A (en) * | 1999-11-25 | 2000-07-19 | 孟宪民 | Vibratory pipe sinking dug-hole pile |
| SG103365A1 (en) * | 2002-10-08 | 2004-04-29 | Abv Engineering Pte Ltd | Repairing or reinforcing building foundations |
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2006
- 2006-07-28 CN CNB2006101044144A patent/CN100455731C/en not_active Expired - Fee Related
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101338569B (en) * | 2007-07-03 | 2010-08-18 | 罗安 | Pre-stress type reinforcement method for foundation of buildings |
| CN101787718A (en) * | 2010-02-10 | 2010-07-28 | 上海智平基础工程有限公司 | Casing construction method for reinforcing underground building and structure foundation |
| CN102071679A (en) * | 2010-12-29 | 2011-05-25 | 西安建筑科技大学 | Method for consolidating existing building foundation |
| CN102444147A (en) * | 2011-11-08 | 2012-05-09 | 山西太行建设开发有限公司 | Slant correction method for building |
| CN102561721A (en) * | 2012-02-29 | 2012-07-11 | 化学工业岩土工程有限公司 | Building jacking deviation rectifying method |
| CN102561721B (en) * | 2012-02-29 | 2015-03-25 | 化学工业岩土工程有限公司 | Building jacking deviation rectifying method |
| CN102817381A (en) * | 2012-08-05 | 2012-12-12 | 河北省建筑科学研究院 | Construction method of rear-embedded pile foundation |
| CN102864788A (en) * | 2012-10-19 | 2013-01-09 | 江苏华通工程检测有限公司 | Method for underpinning reinforced bridge pile foundation by bear-type static pressure cluster pile |
| CN105625420A (en) * | 2016-03-10 | 2016-06-01 | 西北综合勘察设计研究院 | Extension type manual hole digging pile support structure and construction method thereof |
| CN106121271A (en) * | 2016-07-02 | 2016-11-16 | 杭州固特建筑加固技术工程有限公司 | A kind of based on the pile splicing structure on the basis of rotary churning pile |
| CN107700521A (en) * | 2017-10-27 | 2018-02-16 | 西安建筑科技大学 | One kind is built（Structure）Build thing foundation stabilization and underpin pier and its construction method |
| CN107700521B (en) * | 2017-10-27 | 2023-06-30 | 西安建筑科技大学 | Building foundation reinforcement underpinning pier and construction method thereof |
| CN111549784A (en) * | 2020-05-26 | 2020-08-18 | 武汉金涛岩土工程有限公司 | Construction process of foundation pit adjacent to building |
| CN111636470A (en) * | 2020-06-23 | 2020-09-08 | 贵州中建建筑科研设计院有限公司 | Structure and method for underpinning raft foundation by manually digging hole and pouring pile foundation |
| CN113833012A (en) * | 2021-10-13 | 2021-12-24 | 山东电力工程咨询院有限公司 | Pile type adjustable fan foundation and construction method |
| CN113833012B (en) * | 2021-10-13 | 2023-02-03 | 山东电力工程咨询院有限公司 | Pile type adjustable fan foundation and construction method |
| CN115305908A (en) * | 2022-07-25 | 2022-11-08 | 甘肃土木工程科学研究院有限公司 | Pit type static pressure grouting steel pipe pile guide pit backfilling construction process |
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