CN101793098A - Coordinated interactive combined rectification method - Google Patents

Coordinated interactive combined rectification method Download PDF

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Publication number
CN101793098A
CN101793098A CN 201010125106 CN201010125106A CN101793098A CN 101793098 A CN101793098 A CN 101793098A CN 201010125106 CN201010125106 CN 201010125106 CN 201010125106 A CN201010125106 A CN 201010125106A CN 101793098 A CN101793098 A CN 101793098A
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anchor
building
cable
foundation
rectification
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CN101793098B (en
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王桢
程晓伟
杨秀梅
张小兵
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Northwest Research Institute Co Ltd of CREC
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Northwest Research Institute Co Ltd of CREC
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Abstract

The invention provides a coordinated interactive combined rectification method, which comprises the following concrete construction steps: respectively digging a vertical shaft or a groove to the top surface of a foundation on a multi-sink side and a low-sink side of a building (construct); constructing anchor bar static pressure piles on a multi-sink side foundation; secondarily pressuring the pile on various anchor bar static pressure piles and uplifting the side foundation; meanwhile, constructing on the low-sink side foundation by prestressed anchor ropes; simultaneously stretching various anchor ropes in grade to sink the side foundation; after finishing rectification, sealing the anchor bar static pressure piles distributed on the multi-sink side for reinforcing the side foundation; and applying the prestress on the anchor ropes at the low-sink side for locking the foundation of the building (construct) to prevent the overturning. The method can realize the two-side forced landing and uplifting interaction, change and coordinate the foundation, effectively improve the controllability and the rectification efficiency of the building (construct), play a role of rapidly preventing the overturning and can achieve the aim of reinforcing the foundation after finishing the rectification.

Description

A kind of coordinated interactive combined rectification method
Technical field the present invention is applicable to building or structure (below be collectively referred to as building) rectification stabilization works technical field, provides that a kind of controllability is good, rectification efficient height, and can only incline rapidly and the coordinated interactive combined rectification method of consolidated subsoil.
Background technology people have built a large amount of building for the needs of producing and live, handle reasons such as not proper or improper use owing to ground, the run-off the straight in construction or use of some building, the lighter influences the normal use of building, forfeiture function of use when serious, even the destruction of collapsing.For major part inclination building, as long as main bearing member (beam, post and load bearing wall) does not have serious damage, have and continue use value, can recover its function of use by rectification and corresponding repair, just in view of this consideration, people constantly attempt adopting suitable method that the building that tilt are carried out rectification setting upright.
At present, kind surplus building rectification reinforcement means has 30 is summarized to get up can reduce forced landing method, lifting method, study in France in advance, laterally Loading Method and synthesis five big classes.Wherein, comprehensive correcting method is meant the combination of adopting two or more inclination correction method, can be the combination of forced landing method, lifting method combination, also can be forced landing lifting combination etc.Comprehensive correcting method is the actual conditions according to building, and the advantage of the various inclination correction methods of integrated use is maximized favourable factors and minimized unfavourable ones, to reach desirable rectification effect.
The anchor jacked pile correcting method belongs to a kind of of lifting method, it utilizes the building deadweight to be counter-force, how bury anchor pole underground on the basis of heavy side at the inclination building, and be connected with the piling frame, then by the piling frame, utilize jack that preformed pile is pressed in the ground by joint by digging good hole in the basis, in the time of piling, the basis is by the anchor pole lifting that makes progress, pile driving pressure and lifting power are a pair of active force and reaction force, when pile driving pressure reaches design load, adopt shaped steel that preformed pile is locked temporarily, adopt many jack to carry out the secondary piling to a plurality of pile bodies simultaneously then, reach the purpose of lifting rectification by the pile driving pressure of control diverse location pile body.How heavy this method distinguishing feature is: in building side pressure stake, many heavy side grounds had both been reinforced, again lifting the basis, play the rectification effect, simultaneously because a part of ground pressure has been shared in stake, also play the effect of only inclining rapidly, be specially adapted to save fast, the in imminent danger building of tilt variation.
Prestress anchorage cable be construction simple, be convenient to control and the anchoring of mature and reliable, in all kinds of geotechnical slope stabilization workss such as water power, highway, railway, mine, municipal administration, obtained extensive use, economic benefit and obvious social benefit have become the main means of geological hazard controls such as deep foundation ditch reinforcing, landslide and high slope.It is to pass soft stratum or slide plane by boring, anchoring section is entered stablize the rock stratum certain depth so that anchored force to be provided, secondly the anchor head place is provided with counter force system outside, then anchor cable is applied prestressed stretch-draw, locking, thereby play the purpose of reinforcing unstable rock mass, augmentor realizes that by electric oil pump hydraulic system and oil pressure gauge controllability is good.The present invention is applied to the prestress anchorage cable technology in the building deviation rectifying project, in that heavy side pressurization is short heavy less, and with many heavy side anchor rod static pressure piles combinations, coordination and interaction, it is controlled to improve rectification, still belongs to the first.
Summary of the invention the object of the present invention is to provide a kind of coordinated interactive combined rectification method, can improve building controllability and rectification efficient, forced landing and lifting interaction, stressed and compatibility of deformation, can play the effect of only inclining rapidly, and rectification also can reach the purpose of consolidated subsoil after finishing.
For achieving the above object, the technical scheme taked of the present invention is:
How heavy a kind of coordinated interactive combined rectification method lay anchor jacked pile lifting basis in building side, lays prestress anchorage cable in heavy side less and load and force foundation settlement, both make up and realize the both sides interaction, basic displacement is coordinated, is improved rectification efficient, specifically realize as follows:
1. the how heavy side of building and heavy less side respectively excavating shaft or groove to basic end face, for anchor jacked pile and construction prestressed cable provide the scope of operation;
2. according to the design and the job practices of anchor jacked pile, on sinking the side group plinth more, the inclination building carry out the anchor jacked pile construction; In the anchor rod static pressure pile driving construction, on the heavy less side group plinth of inclination building, carry out construction prestressed cable, anchor cable must pass the basis and go deep in the ground good ground;
3. finish and after the anchor cable strength of cement mortar reaches design strength when anchor cable construction, Installation Stress sensor, hydraulic jack and locking device on the basis, outer anchor head place of anchor cable, constitute afterburner system by anchor cable, hydraulic jack and coupled electric oil pump, constitute dynamometric system by the oil pressure gauge that is provided with on strain gauge and the electric oil pump;
4. utilize hydraulic jack that each anchor cable that is laid in the heavy less side of inclination building is carried out grading tension simultaneously, impel this side group plinth to sink, meanwhile, to be laid in building how each anchor jacked pile of heavy side carry out the secondary piling, this side group plinth of lifting, both coordination and interaction, acting in conjunction is until reaching the rectification purpose;
5. after rectification is finished, the anchor jacked pile that is laid in many heavy sides is sealed stake, play the effect of reinforcing this side ground, apply prestressing force locking building basis to being laid in less the anchor cable of heavy side, in case incline again;
6. with vertical shaft or trench backfill, recover former terrace.
Described vertical shaft or groove be according to strata condition, must excavation section by section, and brick or concrete guard wall are set, the well domestic demand is aided with illumination, waterproof measure.
If described inclination building underlying strength is can't satisfy maximum load power and require the time, must on inclination building basis, the steel concrete stiffening girder be set, with the globality and the foundation bearing capacity of raising inclination building, and concrete strength 〉=C25.
The design hole count of described anchor jacked pile and prestress anchorage cable and loading force size, need to determine according to the deadweight and the foundation strength field trial of inclination building, the anchor cable aperture is generally 90~130mm, the steel wire bundle of anchor cable is that Φ 15.24 steel strand process by 4~8 high strength, underrelaxation, diameter generally, the anchor cable design load is bigger, then big more, the steel strand radical in anchor cable aperture also the more, anchor cable grouting strength of cement mortar 〉=M30.
It is one-level that described prestress anchorage cable loads general per 100~150kN, and every grade has loaded and holds lotus and can carry out the next stage loading after 0.5~1 hour; When anchor jacked pile and prestress anchorage cable pressurization coordination and rectification, feedback information is crucial, to whether be linear change according to the deflection curve on basis, in time adjust the lifting power of anchor jacked pile and the pressure of anchor cable, strive accomplishing each limit basis displacement linearity of building, coordination, steady.
Coordinated interactive combined rectification method provided by the invention, prestress anchorage cable is loaded the forced landing method and the anchor jacked pile lifting method organically combines, the heavy less side of inclination building is force-landed, many heavy sides are carried out lifting, be similar to " seesaw " both sides interaction, distortion and stressed coordination form a moment of couple opposite with the building heeling moment, reach the purpose to the building rectification.In this kind combined inclination correction method implementation process, by the anchor jacked pile at each position of continuous regulation and control inclination building and the loading force size of prestress anchorage cable, linear displacement, safety that easy realization building return in the process of inclining are controlled, make the inclination building whole stressed more scientific and reasonable in returning the process of inclining, avoid when a side application of force stress to concentrate, the damage basis.In addition, coordinate to carry out in the time of forced landing of this kind combined inclination correction method and lifting, improved rectification efficient greatly, elevation to building changes minimum, after reaching predetermined rectification target, by anchor cable being applied prestressing force locking basis and anchor jacked pile is sealed stake under the condition of not off-load, can play consolidated subsoil and the effect that prevents " inclining again " again.Fast short stopping inclines and the function of strengthening soft foundation because anchor jacked pile has, so the present invention is particularly suitable for those ground weaknesses, tilt that development is fast, body is tall and big and to the strict inclination building of Height control, have wide practical use in building rectification stabilization works field.
Appended drawings is the principle schematic of coordinated interactive combined rectification method of the present invention.
Among the figure: 1. building, 2. basic raft plate, 3. ground, 4. heavy less side, 5. many heavy sides, 6. anchor pole, 7. piling frame, 8. jack, 9. anchor jacked pile, 10. vertical shaft (groove), 11. prestress anchorage cables, 12. strain gauges, 13. feed-through hydraulic jack.
The specific embodiment is for further setting forth technological means and the technique effect that the present invention is adopted when realizing predetermined purpose, the invention will be further described below in conjunction with specific embodiment and accompanying drawing thereof:
As shown in Figure 1, technical solution of the present invention is used for the residential building rectification stabilization works of certain mat foundation, its concrete implementation step is as follows:
At first, building how heavy side 5 anchor jacked pile 9, less the prestress anchorage cable 11 of heavy side 4 the design attitude place respectively excavating shaft (or groove) 10 to basic raft plate 2 end faces, according to strata condition vertical shaft (groove) 10 palpus excavation section by section, basic raft plate 2 absolute altitude places to building 1, for 11 constructions of anchor jacked pile 9 and prestress anchorage cable provide work plane, and brick or concrete guard wall are set, well (groove) 10 domestic demands are aided with illumination, waterproof measure; How design and job practices according to anchor jacked pile 9 dig piling hole on the basic raft plate 2 in heavy side 5 vertical shafts (groove) 10, stake hole periphery is buried anchor pole 6 underground, upright piling frame 7, with jack 8 concrete prefabricated anchor jacked pile 9 one is saved and to be pressed in the ground 3, when pile driving pressure reaches design load, adopt angle iron that each anchor jacked pile 9 is locked temporarily, meanwhile, according to the design of prestress anchorage cable 11 and the job practices vertical anchor cable hole of beating on the basic raft plate 2 in heavy side 4 vertical shafts (groove) 10 less, the anchor cable aperture is generally 90~130mm, the steel wire bundle of anchor cable is generally by 4~8 high strength, underrelaxation, diameter is that Φ 15.24 steel strand process, the anchor cable design load is bigger, then the anchor cable aperture is big more, the steel strand radical also the more, the anchor cable hole must be passed basic raft plate 2 and go deep in the good ground of ground 3, in the anchor cable hole, insert the anchor cable body that processes, pressure injection cement mortar, anchor cable grouting strength of cement mortar 〉=M30 then.The design hole count of anchor jacked pile 9 and prestress anchorage cable 11 and loading force size need to determine according to the deadweight and the foundation strength field trial of inclination building.When if inclination building 1 basic raft plate 2 intensity can't satisfy the requirement of maximum load power, must on inclination building 1 basic raft plate 2, the steel concrete stiffening girder be set, with the globality and the foundation bearing capacity of raising inclination building 1, and concrete strength is not less than C25.When anchor cable construction finish and the anchor cable hole in after strength of cement mortar reaches design strength, Installation Stress sensor 12 on the basic raft plate 2 at anchor head place outside each prestress anchorage cable 11, feed-through hydraulic jack 13 and locking device, by anchor cable, hydraulic jack and coupled electric oil pump constitute afterburner system, constitute dynamometric system by the oil pressure gauge that is provided with on strain gauge 12 and the electric oil pump, each prestress anchorage cable 11 that utilizes 13 pairs on feed-through hydraulic jack to be laid in the heavy less side 4 of inclination building 1 carries out the while grading tension, increase the subsidiary stress of this side ground 3, reach the purpose of impelling basic raft plate 2 to sink, it is one-level that grading tension loads general per 100~150kN, it is 0.5~1 hour that the lotus time is held in every grade of loading, press 130kN control in the present embodiment, it is 0.8 hour that the lotus time is held in every grade of loading, write down the reading of oil pressure gauge and strain gauge 12 simultaneously, check afterburning size, monitor inclination building 1 sedimentation and displacement situation in real time, timely feedback information, meanwhile, each anchor jacked pile 9 that is laid in many heavy sides 5 is carried out the secondary piling, this side group plinth raft plate 2 of lifting, the both sides coordination and interaction, acting in conjunction, until reaching the rectification purpose, when anchor jacked pile 9 and prestress anchorage cable 11 pressurization coordination and rectifications, feedback information is crucial, to whether be linear change according to the deflection curve on basis, in time adjust the lifting power of anchor jacked pile and the pressure of anchor cable, strive accomplishing each limit basis displacement linearity of building, coordinate, steadily.After rectification is finished, the anchor jacked piles 9 that are laid in many heavy sides 5 are sealed stake, play the effect of reinforcing this side ground 3, apply prestressing force and lock basic raft plate 2 being laid in less the prestress anchorage cable 11 of heavy side 4, in case " inclining again ".With vertical shaft (groove) 10 backfills, return to former terrace at last, Lime-Loess Strength is consistent with former foundation soil strength, and the on-the-spot examination of proportioning is joined the back and determined.
The residential building rectification reinforcement experiment of certain mat foundation proves: it is scientific and reasonable, safe, practicable safely adopting this inclination correction method.This kind inclination correction method makes forced landing method and lift-up method coordination and interaction, has not only improved artificial controllability and the rectification efficient of building in the rectification process greatly, and is minimum to the elevation change of building, and plays consolidated subsoil and prevent " inclining again " effect.
Above, describing the specific embodiment of the present invention with reference to the accompanying drawings, is not to be used for limiting the invention.Those skilled in the art can understand, under situation without departing from the spirit and scope of the present invention, under technology enlightenment provided by the present invention, can also make other equivalent modifications and improvement to the specific embodiment of the present invention, these changes and replace all drop in claims of the present invention institute restricted portion.

Claims (5)

1. coordinated interactive combined rectification method, it is characterized in that: how heavy side is laid anchor jacked pile lifting basis at building or structure, laying prestress anchorage cable in heavy side less loads and forces foundation settlement, both make up and realize the both sides interaction, basic displacement is coordinated, improve rectification efficient, specifically realize as follows:
1. building or structure how heavy side and heavy less side respectively excavating shaft or groove to basic end face, for anchor jacked pile and construction prestressed cable provide the scope of operation;
2. according to the design and the job practices of anchor jacked pile, how carry out the anchor jacked pile construction on the heavy side group plinth at inclined building or structure; In the anchor rod static pressure pile driving construction, on inclined building or the heavy less side group plinth of structure, carry out construction prestressed cable, anchor cable must pass the basis and go deep in the ground good ground;
3. finish and after the anchor cable strength of cement mortar reaches design strength when anchor cable construction, Installation Stress sensor, hydraulic jack and locking device on the basis, outer anchor head place of anchor cable, constitute afterburner system by anchor cable, hydraulic jack and coupled electric oil pump, constitute dynamometric system by the oil pressure gauge that is provided with on strain gauge and the electric oil pump;
4. utilize hydraulic jack that each anchor cable that is laid in the heavy less side of inclined building or structure is carried out grading tension simultaneously, impel this side group plinth to sink, meanwhile, to be laid in building or structure how each anchor jacked pile of heavy side carry out the secondary piling, this side group plinth of lifting, both coordination and interaction, acting in conjunction is until reaching the rectification purpose;
5. after rectification is finished, the anchor jacked pile that is laid in many heavy sides is sealed stake, play the effect of reinforcing this side ground, apply prestressing force locking building or structure base to being laid in less the anchor cable of heavy side, in case incline again;
6. with vertical shaft or trench backfill, recover former terrace.
2. coordinated interactive combined rectification method according to claim 1 is characterized in that: described vertical shaft or groove be according to strata condition, must excavation section by section, and brick or concrete guard wall are set, the well domestic demand is aided with illumination, waterproof measure.
3. coordinated interactive combined rectification method according to claim 1, it is characterized in that: if described inclined building or structure base intensity are can't satisfy maximum load power and require the time, the steel concrete stiffening girder must be set on inclined building or structure base, with the globality and the foundation bearing capacity of raising inclined building or structure, and concrete strength 〉=C25.
4. coordinated interactive combined rectification method according to claim 1, it is characterized in that: the design hole count of described anchor jacked pile and prestress anchorage cable and loading force size, need to determine according to the deadweight and the foundation strength field trial of inclined building or structure, the anchor cable aperture is generally 90~130mm, the steel wire bundle of anchor cable is that Φ 15.24 steel strand process by 4~8 high strength, underrelaxation, diameter generally, the anchor cable design load is bigger, then big more, the steel strand radical in anchor cable aperture also the more, anchor cable grouting strength of cement mortar 〉=M30.
5. coordinated interactive combined rectification method according to claim 1 is characterized in that: it is one-level that described prestress anchorage cable loads general per 100~150kN, and every grade has loaded and holds lotus and can carry out the next stage loading after 0.5~1 hour; When anchor jacked pile and prestress anchorage cable pressurization coordination and rectification, feedback information is crucial, to whether be linear change according to the deflection curve on basis, in time adjust the lifting power of anchor jacked pile and the pressure of anchor cable, strive accomplishing each limit basis displacement linearity of building or structure, coordination, steady.
CN 201010125106 2010-03-13 2010-03-13 Coordinated interactive combined rectification method Active CN101793098B (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102605783A (en) * 2012-01-10 2012-07-25 葛培中 Construction method for applying prestress to anchor jacked piles
CN105155602A (en) * 2015-09-11 2015-12-16 中铁西北科学研究院有限公司 Multi-support foundation strengthening comprehensive controlling method
CN106522293A (en) * 2016-11-29 2017-03-22 叶香雄 Deviation rectifying method for building with raft foundation
CN106592615A (en) * 2016-11-17 2017-04-26 叶香雄 Deviation rectification construction method for inclined sink
CN109083433A (en) * 2018-08-06 2018-12-25 徽都建设有限公司 A kind of building inclination rectification reinforcement means

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BG49325A1 (en) * 1989-11-04 1991-10-15 Brv Khidrotekhnichesko Str Method for straightening inclined constructions
CN2344479Y (en) * 1997-07-23 1999-10-20 夏强 Controllable deviation-rectifying construction method for leaning building
CN101215929A (en) * 2007-12-26 2008-07-09 南京工业大学 House deviation rectifying sink well given force construction method

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BG49325A1 (en) * 1989-11-04 1991-10-15 Brv Khidrotekhnichesko Str Method for straightening inclined constructions
CN2344479Y (en) * 1997-07-23 1999-10-20 夏强 Controllable deviation-rectifying construction method for leaning building
CN101215929A (en) * 2007-12-26 2008-07-09 南京工业大学 House deviation rectifying sink well given force construction method

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
《山东建筑大学学报》 20080430 张鑫,姜千君,魏焕卫 建(构)筑物纠倾技术进展 第167-168页 1-5 第23卷, 第2期 *

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102605783A (en) * 2012-01-10 2012-07-25 葛培中 Construction method for applying prestress to anchor jacked piles
CN105155602A (en) * 2015-09-11 2015-12-16 中铁西北科学研究院有限公司 Multi-support foundation strengthening comprehensive controlling method
CN105155602B (en) * 2015-09-11 2017-03-08 中铁西北科学研究院有限公司 A kind of many fulcrums foundation stabilization synthesis inclination correction method
CN106592615A (en) * 2016-11-17 2017-04-26 叶香雄 Deviation rectification construction method for inclined sink
CN108360545A (en) * 2016-11-17 2018-08-03 叶香雄 It tilts open caisson and combines deviation rectification construction method
CN106522293A (en) * 2016-11-29 2017-03-22 叶香雄 Deviation rectifying method for building with raft foundation
CN108385742A (en) * 2016-11-29 2018-08-10 叶香雄 Deviation correcting technology with raft foundation building
CN109083433A (en) * 2018-08-06 2018-12-25 徽都建设有限公司 A kind of building inclination rectification reinforcement means

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