CN105155602A - Multi-support foundation strengthening comprehensive controlling method - Google Patents
Multi-support foundation strengthening comprehensive controlling method Download PDFInfo
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- CN105155602A CN105155602A CN201510578306.XA CN201510578306A CN105155602A CN 105155602 A CN105155602 A CN 105155602A CN 201510578306 A CN201510578306 A CN 201510578306A CN 105155602 A CN105155602 A CN 105155602A
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- 238000005728 strengthening Methods 0.000 title abstract 3
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims abstract description 41
- 235000015450 Tilia cordata Nutrition 0.000 claims abstract description 41
- 235000011941 Tilia x europaea Nutrition 0.000 claims abstract description 41
- 239000004571 lime Substances 0.000 claims abstract description 41
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 29
- 239000010959 steel Substances 0.000 claims abstract description 29
- 239000002689 soil Substances 0.000 claims abstract description 20
- 210000002356 Skeleton Anatomy 0.000 claims abstract description 9
- 239000004567 concrete Substances 0.000 claims abstract description 8
- 238000004062 sedimentation Methods 0.000 claims description 39
- ODINCKMPIJJUCX-UHFFFAOYSA-N calcium monoxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 14
- 230000000694 effects Effects 0.000 claims description 13
- 238000011105 stabilization Methods 0.000 claims description 12
- 230000002787 reinforcement Effects 0.000 claims description 8
- 235000012255 calcium oxide Nutrition 0.000 claims description 7
- 239000000292 calcium oxide Substances 0.000 claims description 7
- 238000010276 construction Methods 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 3
- 239000011083 cement mortar Substances 0.000 claims description 3
- 230000029087 digestion Effects 0.000 claims description 3
- 230000011218 segmentation Effects 0.000 claims description 3
- 230000003014 reinforcing Effects 0.000 abstract description 2
- 238000005336 cracking Methods 0.000 description 2
- 201000010099 disease Diseases 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 241000404883 Pisa Species 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000005213 imbibition Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000002965 rope Substances 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000010257 thawing Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The invention provides a multi-support foundation strengthening comprehensive controlling method, which comprises steps: 1 vertical shafts are excavated beside a building; 2 anchor cables are fixedly constructed; 3 the anchor cables are provided with a force adding system and a force measuring system; 4 a vertical steel pipe column, a vertical lime pile, a lime pile leaned 45 degrees and lime pile leaned 60 degrees are arranged; 5 the anchor cables are loaded and tensioned in a graded mode through a hydraulic jack; 6 the anchor cables are stressed or goes on to horizontally dig soils when not achieving to a rectification target; 7 the anchor cables are locked after achieving an intended rectification target; 8 a reinforcing cage skeleton is arranged between the steel pipe pile and a raft foundation, and is irrigated with concrete; and 9 various excavated vertical shafts and digging-out-soil holes are backfilled. The multi-support foundation strengthening comprehensive controlling method organically combines forced landing, expansion and jacking, can control tilt direction and tilt speed of a building, further guarantees satiability of the building, and enables tilt not to happen again.
Description
Technical field
The present invention relates to building inclination rectification method, particularly one branched comprehensive inclination correction method of ground stabilization.
Background technology
Due to prospecting error, design the reasons such as improper, construction quality is inferior, working service and natural calamity and often make building uneven subsidence, the defect phenomenon such as run-off the straight, warpage, cracking, sinking.In addition, underground space development, deep pit digging also often make to close on ground building uneven subsidence, cause the disease of the phenomenons such as ground building cracking, inclination, these diseases the lighter affects the normal use of building, it is made to lose using function time serious, even collapse, causes heavy economic losses and casualties.
For globality after tilting still good building, if as usual used, always some sense of insecurity, if given it up, then causes the wasting of resources, is very unfortunate, is removed, and wastes very large.Therefore, rectifying a deviation to this kind of building, and its differential settlement is stablized, is the method for economical rationality.In addition to some building, as Leaning Tower of Pisa, Italy, the Ta Deng scenic spots and historical sites, Huqiu, Suzhou, it can only be made to tilt stop and rectifying a deviation, must not to dismantle reconstruction from the angle of protection historical relic.
At present, building inclination correction method has more than 30 and plants, and Shallow Digging forced settlement is wherein a kind of, is inside the raft foundation of inclination building or under the substrate of outside, adopt artificial or mechanical level to fetch earth, substrate support area is reduced.Under the effect of upper load gravity pressure, produce new differential settlement, to reach rectification object.The horizontal subsoil extraction of shallow-layer is the most basic method, and Application comparison is extensive.But still exist a lot of not enough, first, for the building that tilt quantity is larger, because Shallow Digging forced settlement soil digging amount is limited, real rectification effect cannot be reached, same other single inclination correction methods, are also difficult to reach rectification effect for the building that tilt quantity is larger.Secondly, single makes inclination building forced-landing tilt correcting with Shallow Digging forced settlement, the forced landing situation of inclination building cannot be monitored in real time, speed of force-landing cannot be controlled accurately, thus accurate rectification effect cannot be reached.Again, rectification just takes stopgap measures, and can not effect a permanent cure, and causes the reason of building sedimentation still not eliminate after rectification, and building still exist the possibility of inclination and sedimentation again, and accident potential is large, and safety is low.
Summary of the invention
For above-mentioned Problems existing, the object of the present invention is to provide a kind of will to force-land, expand, jacking combination, formed and a kind ofly coordinate controlled comprehensive inclination correction method, for building provides branched some ground stabilization, not only make building inclination direction and Ramp rates controlled, but also ensure building " steady lives ", can not run-off the straight again, make forced landing, expansion, jacking compatible deformation, the rectification playing " safe, linear, steady " is only inclined effect, but also can reach the object of ground stabilization.
Technical scheme of the present invention is achieved in that
A kind of branched comprehensive inclination correction method of ground stabilization, comprises the following steps:
(1), inclined building or structure present situation, engineering geological conditions, the inclination analysis of causes is investigated, some mouthfuls of vertical shafts are excavated respectively in inclined building or the many sides of structure sedimentation and the few side of sedimentation, 1.7m ~ 2.0m under shaft depths to raft foundation, for lime pile, steel pipe pile and anchor cable construction provide working space;
(2), according to the heeling moment of building or structure, basis and foundation soil strength, the quantity and the single anchor cable that calculate laying anchor cable are stressed, according to design aperture and the length of anchor cable, building or the few basis, side of structure sedimentation carry out anchor cable construction, and anchor cable must pass raft foundation and go deep in ground good ground;
(3), after in anchor cable hole, cement mortar reaches design strength, anchor cable outer anchor head place erection stress sensor, hydraulic jack and locking device on building or structure base, form afterburner system by anchor cable, hydraulic jack and coupled electric oil pump, form dynamometric system by the oil pressure gauge that strain gauge and electric oil pump are arranged;
(4), construct in the vertical shaft of inclined building or the many sides of structure sedimentation, get out vertical steel tube stake holes, vertical lime stake holes, the 45 ° of lime stake holes that tilt and the 60 ° of lime stake holes that tilt, vertical steel tube stake holes and vertical lime stake holes interlaced arrangement, steel pipe pile is imbedded in steel pipe stake holes, steel pipe pile extends to raft foundation top or raft foundation bottom, in vertical lime stake holes, quicklime is poured in the 45 ° of lime stake holes that tilt and the 60 ° of lime stake holes that tilt, segmentation is carried out to it and draws reality, moisture generation digestion reaction around quicklime absorbs in soil, age lime, volume expansion simultaneously, form vertical lime pile, tilt 45 ° of lime piles and the 60 ° of lime piles that tilt, jacking effect is played to inclined building or the many sides of structure sedimentation,
(5), in the vertical shaft that inclined building or structure sedimentation lack side, shallow-layer horizontal digging is carried out, form soil digging hole, according to the feedback of horizontal digging amount and dynamometric system metrical information, by hydraulic jack, loaded and tensioned stage by stage is carried out to anchor cable, record the reading of oil pressure gauge and strain gauge simultaneously, check and correction applies pressure size, monitors inclination and the sedimentation situation of building or structure in real time, timely feedback information;
(6), according to feedack, when building or structure return incline reach predetermined rectification target time, should anchor cable be stopped immediately pressurizeing, when building or structure return the amount of inclining do not reach predetermined rectification target time, and anchor cable now also do not reach design apply pressure time, can have two kinds of modes, one is continue to apply pressure to anchor cable, monitors inclination and the sedimentation situation of inclined building or structure in real time; Two is again carry out horizontal digging in the vertical shaft of the few side of sedimentation, if there is sedimentation to have obvious change, anchor cable force must lose, and can continue to carry out ftercompction to anchor cable;
(7), after the predeterminated target that reaches rectification, to anchor cable locking, anti-object of inclining again is reached;
(8), between steel pipe pile and raft foundation reinforcement cage skeleton is set, and placing of concrete, raft foundation and steel pipe pile, reinforcement cage skeleton are formed and expands base, improve foundation capability, prevent sedimentation again;
(9), each vertical shaft excavated and soil digging hole are backfilled.
Further, the inwall of described vertical shaft is provided with concrete guard wall, in described vertical shaft, is also provided with upper and lower staircase and lighting device.
Beneficial effect of the present invention:
1, anchor cable is loaded forced landing, Shallow Digging forced landing and lime pile water suction jacking organically to combine, the few side of inclination building sedimentation is carried out artificial soil digging and accurately force-landed in conjunction with anchor cable, the many sides of sedimentation are carried out " lifting, reinforcing ", both sides form interaction, according to the feedback of deformation observation information, ensure the distortion of inclination building raft foundation and stressed controlled, coordination, form spatially a pair moment of couple, reach the object to building ground stabilization and rectification.
2, first steel pipe pile and lime pile are applied in ground stabilization and deviation rectifying project with the form combining pile group, to improve the supporting capacity of foundation soil, especially being useful in foundation soil is in collapsible loess foundation, when vertical shaft backfills, steel pipe pile is extended at the bottom of raft plate top or raft plate, and reinforcement cage skeleton is set, by raft foundation together with steel pipe pile, reinforcement cage skeleton concrete casting, form an expansion base, further raising foundation capability, fundamentally solve the reason of building inclination and sedimentation, prevent from again inclining again.
3, forced settlement and lift-up method are coordinated to carry out by this kind of comprehensive inclination correction method, ensure that building Carrying capacity is consistent, there will not be the phenomenon of soft or hard inequality, after rectification puts in place, little to the Level Change of building, the suitable building be used in highly there being strict restriction, such as, ancient building or the ground stabilization of ancient tower class and building rectification;
4, expansion lift-up method is the feature utilizing quicklime to have imbibition heating and solid soil, to the method that inclination building are rectified a deviation, the advantages such as its raw material supply is convenient, construction equipment is simple, technology is easily popularized, speed of application is fast, cheap, rectifying effect is obvious.
5, by the reasonable Arrangement to the few side anchor rope of building sedimentation, the anchor cable of adjustment diverse location, apply different pressure, classification is exerted pressure, with the reading of overwriting sensor and oil pressure gauge, carry out vernier control rectification, control returning of building and incline direction and return speed of inclining, avoid, because of the excessive destruction caused raft foundation or anchor cable itself of exerting pressure, affecting rectifying effect.
6, after being put in place by rectification, sealing off and covering anchorage is carried out to the condition of the band load of anchor cable, the effect of " preventing inclining again " can be played to building, firmly " pinning " building.
7, the present invention is useful in forced landing district area greatly, and depth-width ratio is little, annex load light, the building of basic plane complex forms, and not by the impact of environment temperature, immediately in the winter time, it is also unaffected that foundation soil exists certain freeze thawing degree of depth.
8, tall and big for build, complicated unidirectional inclination or the building of inclined in two-way all applicable.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the principle schematic of a kind of branched comprehensive inclination correction method of ground stabilization of the present invention;
Fig. 2 is the sectional view along A-A line in Fig. 1.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
With reference to Fig. 1-2, a kind of branched comprehensive inclination correction method of ground stabilization, comprises the following steps:
(1), inclined building or structure 1 present situation, engineering geological conditions, the inclination analysis of causes is investigated, some mouthfuls of vertical shafts 2 are excavated respectively in inclined building or the many sides 11 of structure 1 sedimentation and the few side 12 of sedimentation, vertical shaft 2 degree of depth to raft foundation 3 times 1.7m ~ 2.0m, for lime pile, steel pipe pile and anchor cable construction provide working space;
(2), according to the heeling moment of building or structure 1, basis and foundation soil strength, the quantity and the single anchor cable 4 that calculate laying anchor cable 4 are stressed, according to design aperture and the length of anchor cable 4, building or the few basis, side 11 of structure 1 sedimentation carry out anchor cable 4 construct, anchor cable 4 must pass raft foundation 3 and go deep in ground good ground;
(3), after in anchor cable 4 hole, cement mortar reaches design strength, anchor cable 4 outer anchor head place erection stress sensor 41, hydraulic jack 42 and locking device on building or structure 1 basis, form afterburner system by anchor cable 4, hydraulic jack 42 and coupled electric oil pump, form dynamometric system by the oil pressure gauge that strain gauge 41 and electric oil pump are arranged;
(4), construct in the vertical shaft 2 of inclined building or the many sides 11 of structure 1 sedimentation, get out vertical steel tube stake holes, vertical lime stake holes, the 45 ° of lime stake holes that tilt and the 60 ° of lime stake holes that tilt, vertical steel tube stake holes and vertical lime stake holes interlaced arrangement, steel pipe pile 51 is imbedded in steel pipe stake holes, steel pipe pile extends to bottom raft foundation 3 top or raft foundation 3, in vertical lime stake holes, quicklime is poured in the 45 ° of lime stake holes that tilt and the 60 ° of lime stake holes that tilt, segmentation is carried out to it and draws reality, moisture generation digestion reaction around quicklime absorbs in soil, age lime, volume expansion simultaneously, form vertical lime pile 52, tilt 45 ° of lime piles 53 and the 60 ° of lime piles 54 that tilt, jacking effect is played to inclined building or the many sides 11 of structure 1 sedimentation,
(5), in the vertical shaft 2 that inclined building or structure 1 sedimentation lack side 12, shallow-layer horizontal digging is carried out, form soil digging hole 21, according to the feedback of horizontal digging amount and dynamometric system metrical information, loaded and tensioned stage by stage is carried out by hydraulic jack 42 pairs of anchor cables 4, record the reading of oil pressure gauge and strain gauge 41 simultaneously, check and correction applies pressure size, monitors inclination and the sedimentation situation of building or structure 1 in real time, timely feedback information;
(6), according to feedack, when building or structure incline for 1 time reach predetermined rectification target time, anchor cable 4 should be stopped immediately pressurizeing, when building or structure 1 time amount of inclining do not reach predetermined rectification target, and anchor cable 4 now also do not reach design apply pressure time, can have two kinds of modes, one is continue to apply pressure to anchor cable 4, monitors inclination and the sedimentation situation of inclined building or structure 1 in real time; Two is again carry out horizontal digging in the vertical shaft 2 of the few side of sedimentation, if there is sedimentation to have obvious change, anchor cable 4 Suo Libi loses, and can continue to carry out ftercompction to anchor cable 4;
(7), after the predeterminated target that reaches rectification, anchor cable 4 is locked, reaches anti-object of inclining again;
(8), between steel pipe pile and raft foundation 3 reinforcement cage skeleton 6 is set, and placing of concrete 7, make raft foundation 3 and steel pipe pile, reinforcement cage skeleton 6 be formed and expand base, improve foundation capability, prevent sedimentation again;
(9), each vertical shaft 2 excavated and soil digging hole 21 are backfilled.
Preferably, the inwall of described vertical shaft 2 is provided with concrete guard wall 22, in described vertical shaft 2, is also provided with upper and lower staircase and lighting device.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (2)
1. branched the comprehensive inclination correction method of ground stabilization, is characterized in that, comprise the following steps:
(1), inclined building or structure present situation, engineering geological conditions, the inclination analysis of causes is investigated, some mouthfuls of vertical shafts are excavated respectively in inclined building or the many sides of structure sedimentation and the few side of sedimentation, 1.7m ~ 2.0m under shaft depths to raft foundation, for lime pile, steel pipe pile and anchor cable construction provide working space;
(2), according to the heeling moment of building or structure, basis and foundation soil strength, the quantity and the single anchor cable that calculate laying anchor cable are stressed, according to design aperture and the length of anchor cable, building or the few basis, side of structure sedimentation carry out anchor cable construction, and anchor cable must pass raft foundation and go deep in ground good ground;
(3), after in anchor cable hole, cement mortar reaches design strength, anchor cable outer anchor head place erection stress sensor, hydraulic jack and locking device on building or structure base, form afterburner system by anchor cable, hydraulic jack and coupled electric oil pump, form dynamometric system by the oil pressure gauge that strain gauge and electric oil pump are arranged;
(4), construct in the vertical shaft of inclined building or the many sides of structure sedimentation, get out vertical steel tube stake holes, vertical lime stake holes, the 45 ° of lime stake holes that tilt and the 60 ° of lime stake holes that tilt, vertical steel tube stake holes and vertical lime stake holes interlaced arrangement, steel pipe pile is imbedded in steel pipe stake holes, steel pipe pile extends to raft foundation top or raft foundation bottom, in vertical lime stake holes, quicklime is poured in the 45 ° of lime stake holes that tilt and the 60 ° of lime stake holes that tilt, segmentation is carried out to it and draws reality, moisture generation digestion reaction around quicklime absorbs in soil, age lime, volume expansion simultaneously, form vertical lime pile, tilt 45 ° of lime piles and the 60 ° of lime piles that tilt, jacking effect is played to inclined building or the many sides of structure sedimentation,
(5), in the vertical shaft that inclined building or structure sedimentation lack side, shallow-layer horizontal digging is carried out, form soil digging hole, according to the feedback of horizontal digging amount and dynamometric system metrical information, by hydraulic jack, loaded and tensioned stage by stage is carried out to anchor cable, record the reading of oil pressure gauge and strain gauge simultaneously, check and correction applies pressure size, monitors inclination and the sedimentation situation of building or structure in real time, timely feedback information;
(6), according to feedack, when building or structure return incline reach predetermined rectification target time, should anchor cable be stopped immediately pressurizeing, when building or structure return the amount of inclining do not reach predetermined rectification target time, and anchor cable now also do not reach design apply pressure time, can have two kinds of modes, one is continue to apply pressure to anchor cable, monitors inclination and the sedimentation situation of inclined building or structure in real time; Two is again carry out horizontal digging in the vertical shaft of the few side of sedimentation, if there is sedimentation to have obvious change, anchor cable force must lose, and can continue to carry out ftercompction to anchor cable;
(7), after the predeterminated target that reaches rectification, to anchor cable locking, anti-object of inclining again is reached;
(8), between steel pipe pile and raft foundation reinforcement cage skeleton is set, and placing of concrete, raft foundation and steel pipe pile, reinforcement cage skeleton are formed and expands base, improve foundation capability, prevent sedimentation again;
(9), each vertical shaft excavated and soil digging hole are backfilled.
2. branched the comprehensive inclination correction method of ground stabilization as claimed in claim 1, is characterized in that: the inwall of described vertical shaft is provided with concrete guard wall, is also provided with upper and lower staircase and lighting device in described vertical shaft.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105887948A (en) * | 2016-04-15 | 2016-08-24 | 中铁西北科学研究院有限公司西南分院 | Inclination resetting, deviation correction and reinforcement method for anti-slide pile |
| CN106049973A (en) * | 2016-07-29 | 2016-10-26 | 中国矿业大学 | Inclined hole soil digging and inclination correcting method for governing coal mine rooting shaft tower inclination |
| CN106522292A (en) * | 2016-09-20 | 2017-03-22 | 中科院广州化灌工程有限公司 | Grouting combined prestressed anchor rod static pressure pile rectification and reinforcement method |
| CN109736369A (en) * | 2019-01-10 | 2019-05-10 | 江苏工程职业技术学院 | A kind of subsidence control method based on building stress relief method rectification |
| CN113863285A (en) * | 2021-10-14 | 2021-12-31 | 山东建大工程鉴定加固设计有限公司 | Inclination stopping method for high-rise building with foundation side large-diameter pile and external box type structure |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105887948A (en) * | 2016-04-15 | 2016-08-24 | 中铁西北科学研究院有限公司西南分院 | Inclination resetting, deviation correction and reinforcement method for anti-slide pile |
| CN106049973A (en) * | 2016-07-29 | 2016-10-26 | 中国矿业大学 | Inclined hole soil digging and inclination correcting method for governing coal mine rooting shaft tower inclination |
| CN106522292A (en) * | 2016-09-20 | 2017-03-22 | 中科院广州化灌工程有限公司 | Grouting combined prestressed anchor rod static pressure pile rectification and reinforcement method |
| CN109736369A (en) * | 2019-01-10 | 2019-05-10 | 江苏工程职业技术学院 | A kind of subsidence control method based on building stress relief method rectification |
| CN109736369B (en) * | 2019-01-10 | 2020-07-07 | 江苏工程职业技术学院 | Settlement control method based on building stress relief method rectification |
| CN113863285A (en) * | 2021-10-14 | 2021-12-31 | 山东建大工程鉴定加固设计有限公司 | Inclination stopping method for high-rise building with foundation side large-diameter pile and external box type structure |
| CN113863285B (en) * | 2021-10-14 | 2022-10-18 | 山东建大工程鉴定加固设计有限公司 | Inclination stopping method for high-rise building with foundation side large-diameter pile and external box type structure |
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| CN105155602B (en) | 2017-03-08 |
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