CN102561721A - Building jacking deviation rectifying method - Google Patents
Building jacking deviation rectifying method Download PDFInfo
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- CN102561721A CN102561721A CN2012100491165A CN201210049116A CN102561721A CN 102561721 A CN102561721 A CN 102561721A CN 2012100491165 A CN2012100491165 A CN 2012100491165A CN 201210049116 A CN201210049116 A CN 201210049116A CN 102561721 A CN102561721 A CN 102561721A
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Abstract
The invention relates to a building jacking deviation rectifying method, which comprises the following steps: excavating a pilot pit on the outer side of a foundation of a building to be rectified, transversely expanding the pilot pit along the foundation of the building, and excavating downwards along the vertical lower part of the foundation until reaching a bearing layer to form a underpinning gallery below the foundation; pouring concrete underpinning pile piers in the underpinning gallery, wherein a gap with a certain distance is reserved between the upper ends of the underpinning pile piers and the lower end of the building foundation; erecting a jack on the underpinning pile pier, jacking a building foundation upwards by using the jack, and then putting a plurality of prefabricated reinforced concrete pile caps; (a plurality of expansion bolts are arranged at the upper end of the pile cap), and the jack is dismantled after the expansion bolts are stressed to expand. Then pouring expanded concrete on the side surface of the prefabricated reinforced concrete pile cap; grouting between underpinning piers causes the soil layer under the building foundation to become dense. Because the expansion screw and the expansion concrete are used in the construction process, the problem that the foundation of the upper building is rebounded and reduced after the jack is removed is solved.
Description
Technical field
The present invention relates to the building method field, especially is a kind of building rectifying by jack up method.
Background technology
The inclination of building is a problem that in worldwide, exists.Owing to structure foundation soil became uneven, soft or hard is irregular, foundation stability is poor, affected by environment big, prospecting is inaccurate, design is wrong, bearing capacity of foundation soil is not enough, layout or improper use cause the building center of gravity and the substrate centre of form to depart from reason such as excessive, that foundation soil is weak, embedded depth of foundation is little often to make the building uneven subsidence, disease phenomenons such as run-off the straight, warpage, cracking, sinking.Urban architecture is in a compact mass in addition; Underground space development, deep pit digging also often make and close on the above ground structure uneven subsidence; Cause the disease of phenomenons such as above ground structure cracking, inclination, these diseases the lighter influences the normal use of building, makes its forfeiture function of use when serious; Even the destruction of collapsing, cause heavy economic losses and casualties.For the still good building of globality after inclination, if use as usual, always have no a sense of safety, if give it up, then cause the wasting of resources, very be unfortunately, then waste its dismounting very big.Therefore, building is rectified a deviation, and to make its differential settlement stable then be the method for economical rationality.Now inclined building is rectified a deviation and mainly contain forced landing and jacking two class methods.Can be divided in the lift-up method and cut the stake correction and underpin straightening method etc.Underpin correction, promptly earlier the basis is held up, change supporting-point again.Existing jacking underpins method for correcting error can be because the load of upper building add the basis bounce-back decline that basis and the prefabricated reinforced concrete stake gap between emitting causes after jack is removed.
Summary of the invention
The object of the invention is to overcome the deficiency of above-mentioned new prior art, and the building rectifying by jack up method that provides a kind of building foundation bounce-back afterwards that effectively prevents to rectify a deviation to descend specifically comprises the steps:
1), in the outside, basis of the building of waiting to rectify a deviation the excavation base tunnel, extending transversely from this base tunnel along said building foundation, and along said basic vertical lower downwards excavation form the tunnel that underpins of below, basis until bearing stratum;
2), underpin said that concreting underpins pile pier in the tunnel, this underpins certain distance is left in the pile pier upper end apart from the lower end, building foundation gap, and the said pile pier that underpins is built the back maintenance certain hour that finishes, up to the requirement of strength that satisfies regulation;
3), put on the shelf and establish jack underpining pile pier, and with this jack said building foundation of jacking that makes progress, put into several prefabricated reinforced concrete pile covers underpining the pile pier upper end again;
4), some swell fixtures are set, and make the expansion direction of said swell fixture consistent with the direction in said gap in said prefabricated reinforced concrete pile cover upper end, said swell fixture reinforcing is made it expansion after, the dismounting jack.Build expansive concrete in said prefabricated reinforced concrete pile cover side again;
5), slip casting makes the soil layer under the building foundation become closely knit between the pile pier underpining;
The soil backfill of 6), said base tunnel being excavated out is smooth.
The further design of said method is that the said gap that underpins pile pier upper end and lower end, building foundation is 500mm.
The further design of said method is that said prefabricated reinforced concrete pile cover is a hollow shell pill, and this prefabricated reinforced concrete pile cover upper end is provided with steel plate, upwards is uniformly distributed with four M8X70 swell fixtures in this steel plate week.
The further design of said method is, after slip casting is accomplished, base tunnel with underpin between the tunnel along basic base block downwards and establish one and be used for the brick wall mould that seals in the tunnel to underpining.
The present invention has been owing to used setscrew and expansive concrete in work progress, efficiently solve when removing jack after because the load of upper building adds the rebound problem of decline of basis that basis and the prefabricated reinforced concrete stake gap between emitting causes.This technology duration is short; The jacking amount can accurately be controlled, and rectifying effect is desirable, and success rate is high, and ground level can be recovered basically.
Description of drawings
Fig. 1 underpinning construction excavation sketch map.
Fig. 2 is a pile pier top pile cover construction sketch map.
Fig. 3 is a pile cover upper end structural representation.
Among the figure, 1 grade, 2 indoor terraces, 3 base tunnels, 4 bases, 5 underpin the tunnel, and 6 underpin pile pier.
The specific embodiment
Below in conjunction with Figure of description the present invention is further specified.
Present embodiment is to wall crazing correction that differential settlement causes in the building.
At first according to the gradient of this body of wall, estimating required jacking amount, is 350mm like the jacking amount.Then excavate base tunnel, map 1, excavation base tunnel 3 on the grade 1 on body of wall basis 4 of waiting to rectify a deviation, extending transversely from base tunnel 3 along this body of wall basis, and continue to be excavated to bearing stratum downwards along basic vertical lower, below, basis this moment forms and underpins tunnel 5; Concreting underpins pile pier 6 in underpining tunnel 5, the lower surface 500mm up to the upper surface that underpins pile pier 6 far from the building foundation.Underpin after pile pier 6 builds completion, maintenance 28 days reaches the above requirement of strength of C30.Set up jack 9 underpining on the pile pier 6 corresponding basic both sides symmetry; See also Fig. 2; Be furnished with a plurality of jack on the pile pier 6 below the body of wall basis, underpining, erect a scale that posts millimeter section paper in that every jack is other, set the gradation top lifting height of this liter point; Gradation jacking body of wall basis, strict control each item rises the jacking amount of point in this process.Underpining several prefabricated reinforced concrete pile covers 8 of placement on the pile pier then; Prefabricated reinforced concrete pile cover 8 is the hollow shell pill that 450mm is high, 100mm is thick; Prefabricated reinforced concrete pile cover 8 upper ends are provided with steel plate, four swell fixtures 81 of the even horizontal that makes progress in the week of this steel plate, and the expansion direction of swell fixture is consistent with the direction that needs jacking; This swell fixture specification is M8X70, and is as shown in Figure 3.
After 81 reinforcings make it to expand to swell fixture, jack 9 is removed.Build expansive concrete in prefabricated reinforced concrete pile cover 8 sides again; Cement injection makes the soil layer under the building foundation 4 become closely knit between the pile pier 6 underpining then, afterwards at base tunnel 3 and underpin between the tunnel 5 to build downwards along basic base and establish one and be used for the brick wall mould 7 that seals in the tunnel to underpining.
The base tunnel 3 soil backfill of excavating out is smooth the most at last.After January is accomplished in this construction, above-mentioned body of wall is measured once more, its sedimentation tends towards stability, and body of wall tilts to have obtained correction.
The present invention adopts setscrew and is used in combination expansive concrete in the work progress of correction, efficiently solve when removing jack after because the load of upper building adds the rebound problem of decline of basis that basis and the prefabricated reinforced concrete stake gap between emitting causes.This technology duration is short; The jacking amount can accurately be controlled, and rectifying effect is desirable, and success rate is high, and ground level can be recovered basically.
Claims (4)
1. a building rectifying by jack up method is characterized in that this method comprises the steps:
1), in the outside, basis of the building of waiting to rectify a deviation the excavation base tunnel, extending transversely from this base tunnel along said building foundation, and along said basic vertical lower downwards excavation form the tunnel that underpins of below, basis until bearing stratum;
2), underpin said that concreting underpins pile pier in the tunnel, this underpins certain distance is left in the pile pier upper end apart from the lower end, building foundation gap, and the said pile pier that underpins is built the back maintenance certain hour that finishes, up to the requirement of strength that satisfies regulation;
3), put on the shelf and establish jack underpining pile pier, and with this jack said building foundation of jacking that makes progress, put into several prefabricated reinforced concrete pile covers underpining the pile pier upper end again;
4), some swell fixtures are set in said prefabricated reinforced concrete pile cover upper end; And make the expansion direction of said swell fixture consistent with the direction in said gap; After said swell fixture reinforcing made it to expand, remove jack, build expansive concrete in said prefabricated reinforced concrete pile cover side again;
5), slip casting makes the soil layer under the building foundation become closely knit between the pile pier underpining;
The soil backfill of 6), said base tunnel being excavated out is smooth.
2. building rectifying by jack up method according to claim 1 is characterized in that: the said gap that underpins pile pier upper end and lower end, building foundation is 500mm.
3. building rectifying by jack up method according to claim 1 is characterized in that: said prefabricated reinforced concrete pile cover is a hollow shell pill, and this prefabricated reinforced concrete pile cover upper end is provided with steel plate, upwards is uniformly distributed with four M8X70 swell fixtures in this steel plate week.
4. building rectifying by jack up method according to claim 1 is characterized in that: after slip casting is accomplished, base tunnel with underpin between the tunnel along basic base block downwards and establish one and be used for the brick wall mould that seals in the tunnel to underpining.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210049116.5A CN102561721B (en) | 2012-02-29 | 2012-02-29 | Building jacking deviation rectifying method |
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| CN201210049116.5A CN102561721B (en) | 2012-02-29 | 2012-02-29 | Building jacking deviation rectifying method |
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| CN102561721B CN102561721B (en) | 2015-03-25 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104131585A (en) * | 2014-08-18 | 2014-11-05 | 慕江源 | Deviation rectifying and reinforcing method for collapsible salty land building foundation mud jacking and pile pressing resetting method |
| CN108425386A (en) * | 2018-05-24 | 2018-08-21 | 山东建筑大学 | Frame structure building promotes correcting method |
| CN109056859A (en) * | 2018-09-11 | 2018-12-21 | 中国电建集团华东勘测设计研究院有限公司 | A kind of tubular type slip casting blower foundation method for correcting error |
| CN110512665A (en) * | 2019-07-18 | 2019-11-29 | 上海建工一建集团有限公司 | The synchronous lifting of existing sinking old building and error-correction structure and its construction method |
| CN110747914A (en) * | 2019-10-15 | 2020-02-04 | 中国化学工程第四建设有限公司 | Large tower equipment inclination correction method |
| CN113216692A (en) * | 2021-04-13 | 2021-08-06 | 广东睿固建设科技有限公司 | Underpinning and jacking masonry construction method |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104131585A (en) * | 2014-08-18 | 2014-11-05 | 慕江源 | Deviation rectifying and reinforcing method for collapsible salty land building foundation mud jacking and pile pressing resetting method |
| CN104131585B (en) * | 2014-08-18 | 2016-06-22 | 慕江源 | Building basis, settlement by soaking salting soil mud jacking piling reduced method correcting and then reinforcing method |
| CN108425386A (en) * | 2018-05-24 | 2018-08-21 | 山东建筑大学 | Frame structure building promotes correcting method |
| CN109056859A (en) * | 2018-09-11 | 2018-12-21 | 中国电建集团华东勘测设计研究院有限公司 | A kind of tubular type slip casting blower foundation method for correcting error |
| CN110512665A (en) * | 2019-07-18 | 2019-11-29 | 上海建工一建集团有限公司 | The synchronous lifting of existing sinking old building and error-correction structure and its construction method |
| CN110747914A (en) * | 2019-10-15 | 2020-02-04 | 中国化学工程第四建设有限公司 | Large tower equipment inclination correction method |
| CN113216692A (en) * | 2021-04-13 | 2021-08-06 | 广东睿固建设科技有限公司 | Underpinning and jacking masonry construction method |
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| Publication number | Publication date |
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| CN102561721B (en) | 2015-03-25 |
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Address after: 210031 building 4, Yangzi science and technology innovation headquarters base, No.5, Pudong North Road, Jiangbei new district, Nanjing City, Jiangsu Province Patentee after: China Chemical Civil Engineering Co.,Ltd. Address before: No. 357, Dachang Yangxin Road, Liuhe District, Nanjing, Jiangsu 210044 Patentee before: CHEMICAL INDUSTRY GEOTECHNICAL ENGINEERING Co.,Ltd. |