CN103741963A - Industrial plant foundation strengthening method - Google Patents
Industrial plant foundation strengthening method Download PDFInfo
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- CN103741963A CN103741963A CN201410007504.6A CN201410007504A CN103741963A CN 103741963 A CN103741963 A CN 103741963A CN 201410007504 A CN201410007504 A CN 201410007504A CN 103741963 A CN103741963 A CN 103741963A
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Abstract
The invention relates to an industrial plant foundation strengthening method, belongs to the field of earthquake-proof strengthening technologies and discloses a foundation processing method. The method comprises the steps of using a newly-increased steel pipe pile and an upper newly-increased concrete bearing platform, fixedly connecting the newly-increased steel pipe pile and the upper newly-increased concrete bearing platform with a primary foundation bearing platform through steel bar anchors, and commonly bearing a newly-added layer structure, so that steadiness and safety of an added layer improving engineering are ensured; and the problems of personnel and property losses caused due to earthquake which is caused due to poor anti-seismic property of original houses in improvement of old plants are solved fundamentally.
Description
Technical field
The present invention relates to a kind of reinforcement means, particularly a kind of workshop foundation reinforcement means, belongs to seismic hardening technical field.
Background technology
As everyone knows, building interior adds layer owing to not taking new soil, reduces investment outlay, and can make full use of existing building structure, especially in old old factory rehabilitation, is used widely.But increasing under superstructure load situation, easily cause foundation bearing capacity deficiency or uneven subsidence, need to reinforce factory building foundation.Use newly-increased steel pipe castinplace pile and concrete bearing platform and former foundation platform anchor connection shared, can obtain good consolidation effect, and construction quality is more easy to control, technical economic benefit is higher, but how to reinforce and how to construct, not seeing in prior art, is technical problem urgently to be resolved hurrily in prior art.
Summary of the invention
Based on above-mentioned defect, the present invention proposes a kind of workshop foundation reinforcement means, after the newly-increased concrete bearing platform of the newly-increased steel pipe pile of its use and top is connected by Bar Anchorage with former foundation platform, the based process of the new adding storey structure of shared, has fundamentally solved the technical problem of or differential settlement poor at old factory building storey-adding reconstruction Central Plains foundation bearing capacity.
To achieve these goals, the present invention has taked following technical scheme:
A kind of workshop foundation reinforcement means, comprises original structure grade beam, former foundation platform and former tube-sinking cast-in-situ pile, and described original structure grade beam is arranged on former foundation platform, and described former tube-sinking cast-in-situ pile is anchored in former foundation platform two bottom sides; Also comprise newly-increased concrete bearing platform, newly-increased steel pipe pile and newly-increased anchor bar; Bearing stratum is goed deep in described newly-increased steel pipe pile bottom, described newly-increased concrete bearing platform is set up in newly-increased steel pipe pile top, and described newly-increased concrete bearing platform and newly-increased steel pipe pile are arranged on former foundation platform both sides simultaneously, the described newly-increased concrete bearing platform of both sides and former foundation platform anchor connection, wherein, in described newly-increased concrete bearing platform, be provided with newly-increased anchor bar, horizontally disposed newly-increased anchor bar insert in former foundation platform and with former foundation platform anchor connection, specifically reinforce step as follows:
Step 1: add a layer position according to the old industrial premises standard width of a room in an old-style house, depth, floor height size and inside, determine that industrial premises original structure foundation bearing capacity is not enough or occur differential settlement position, and draw reinforcing drawing;
Step 2: take measurements with the invar tape degree of accuracy according to drawing and determine the position that increases steel pipe pile newly;
Step 3: according to the position of newly-increased steel pipe pile of determining at surface drilling;
Step 4: at the newly-increased steel pipe pile of floor manufacture;
Step 5: vertically lay above-mentioned newly-increased steel pipe pile in surface drilling;
Step 6: adopt φ 30PVC hard plastic tube as Grouting Pipe, once transfer to newly-increased steel pipe pile bottom, and throw in the rubble coarse aggregate that particle diameter is 2-3cm in newly-increased steel pipe pile;
Step 7: by Grouting Pipe slip casting maintenance in newly-increased steel pipe pile;
Step 8: along the former tube-sinking cast-in-situ pile outside excavation heatable adobe sleeping platform of former foundation platform bottom under original structure grade beam, after the former foundation platform sidewall exposing is cleaned up, by design size, make the position of anchor hole and carry out mark, by designing requirement, bored anchor hole and cleaned out with electric percussion drill;
Step 9: will increase anchor bar newly and insert former foundation platform and bore in anchor hole, and pour into macromolecule resin cementing agent, and make newly-increased anchor bar and former foundation platform anchoring solid;
Step 10: by former foundation platform sidewall dabbing and clean up;
Step 11: the design attitude assembling reinforcement of newly-increased concrete bearing platform in former foundation platform both sides, formwork after-pouring forms newly-increased concrete bearing platform.
Preferably, in described step 3, pore-forming facility adopt XJ-100 type geological drilling rig, aperture φ 168mm; During perforate, adopt the in advance premium mud retaining wall of preparation, through after back-up sand layer, adopt natural mud off, enter middle decomposed rock 0.5m, and get whole hole after rock core, adjust mud property, sediment at the bottom of cleaning hole.
Preferably, in described step 4, newly-increased steel pipe pile adopts GB I level Q235B shape steel tube, saves long 6m, and the steel pipe on newly-increased steel pipe pile overflows slurry hole at floor manufacture, and it performs mark, gas cutting pore-forming with invar tape location.
Preferably, in described step 5, newly-increased steel pipe pile bottom interface adopts the φ 159mm seamless steel pipe of overcoat one joint long 25cm, thick 5mm, and upper lower ring hole full weld, and steel pipe is down to after at the bottom of hole, hits reality with weight, passes through sediment and loosened soil at the bottom of hole.
Preferably, in described step 8, the wide x of the long x of the size of described heatable adobe sleeping platform is high=1000mmx1200mmx1500mm.
Preferably, in described step 9, described newly-increased anchor bar is five, and length is 680mm, and diameter is φ 16mm.
Preferably, in described step 9, the anchorage length of described newly-increased anchor bar in former foundation platform is 200mm.
Preferably, in described step 11, the wide x of the long x of described newly-increased concrete bearing platform size is high=500mmx750mmx800mm.
Preferably, in described step 11, the concrete grade of described newly-increased concrete bearing platform is not less than C25.
Preferably, between described newly-increased concrete bearing platform and newly-increased steel pipe pile, be provided with the reinforcing bar running through up and down, its two ends are stretched into respectively in newly-increased concrete bearing platform and newly-increased steel pipe pile.
Based on technique scheme, technique effect of the present invention is: first, the present invention, by newly-increased steel pipe pile and newly-increased concrete bearing platform, has made up the defect of former foundation bearing capacity deficiency; Secondly, in former foundation platform both sides, by anchor measure, new and old cushion cap is closely connected, under extend rock stratum newly-increased steel pipe pile foundation guaranteed that structure can not continue sedimentation; Simultaneously, under the acting in conjunction of newly-increased concrete bearing platform and former foundation platform (being new and old cushion cap), guaranteed the requirement of factory building follow-up adding storey structure in top to bearing capacity of foundation soil, for further utilizing industrial premises space that good reinforcement measure and effect is provided.
Underpin method of the present invention, simple in structure, power transmission is clear and definite, does not destroy the globality of original structure, and construction period do not affect the use function of original structure, with less cost, realize larger economic benefit.
Accompanying drawing explanation
Fig. 1 is that new and old cushion cap connects floor map;
Fig. 2 is that new and old cushion cap connects generalized section.
Reference numeral: 1: original structure grade beam; 2: former foundation platform; 3: former tube-sinking cast-in-situ pile; 4: newly-increased concrete bearing platform; 5: newly-increased steel pipe pile; 6: newly-increased anchor bar.
The specific embodiment
For making object of the present invention, technical scheme and beneficial effect more cheer and bright, below in conjunction with accompanying drawing, embodiments of the invention are described, it should be noted that, in the situation that not conflicting, the feature in embodiment and embodiment in the application can be combined mutually.
As shown in Figure 1-2, a kind of workshop foundation reinforcement means, comprise original structure grade beam 1, former foundation platform 2 and former tube-sinking cast-in-situ pile 3, original structure grade beam 1 is arranged on former foundation platform 2, former tube-sinking cast-in-situ pile 3 is anchored in former foundation platform 2 two bottom sides, and it also comprises newly-increased concrete bearing platform 4, newly-increased steel pipe pile 5 and newly-increased anchor bar 6.Bearing stratum is goed deep in newly-increased steel pipe pile 5 bottoms, newly-increased concrete bearing platform 4 is set up in newly-increased steel pipe pile 5 tops, and newly-increased concrete bearing platform 4 and newly-increased steel pipe pile 5 are arranged on former foundation platform 2 both sides simultaneously, newly-increased concrete bearing platform 4 and former foundation platform 2 anchor connections of both sides, wherein, in described newly-increased concrete bearing platform 4, be provided with newly-increased anchor bar 6, horizontally disposed newly-increased anchor bar 6 insert in former foundation platform 2 and with former foundation platform 2 anchor connections.
Its concrete following steps that adopt are implemented:
Step 1: add a layer position according to the old industrial premises standard width of a room in an old-style house, depth, floor height size and inside, determine that industrial premises original structure foundation bearing capacity is not enough or occur differential settlement position, and draw reinforcing drawing.
Step 2: take measurements with the invar tape degree of accuracy according to drawing and determine the position that increases steel pipe pile 5 newly.
Step 3: according to the position of newly-increased steel pipe pile 5 of determining at surface drilling.Pore-forming facility adopt XJ-100 type geological drilling rig, aperture φ 168mm; During perforate, adopt the in advance premium mud retaining wall of preparation, through after back-up sand layer, adopt natural mud off, enter middle decomposed rock 0.5m, and get whole hole after rock core, adjust mud property, sediment at the bottom of cleaning hole.
Step 4: at the newly-increased steel pipe pile 5 of floor manufacture.Newly-increased steel pipe pile 5 adopts GB I level Q235B shape steel tube, saves long 6m, and the steel pipe on newly-increased steel pipe pile 5 overflows slurry hole at floor manufacture, and it performs mark, gas cutting pore-forming with invar tape location.
Step 5: vertically lay above-mentioned newly-increased steel pipe pile 5 in surface drilling.Newly-increased steel pipe pile 5 bottom interface adopt the φ 159mm seamless steel pipe of overcoats one joint long 25cm, thick 5mm, and upper lower ring hole full weld, and steel pipe is down to after at the bottom of hole, hit reality with weight, pass through sediment and loosened soil at the bottom of hole.
Step 6: adopt φ 30PVC hard plastic tube as Grouting Pipe, once transfer to newly-increased steel pipe pile 5 bottoms, and the rubble coarse aggregate that is 2-3cm at the newly-increased interior input particle diameter of steel pipe pile 5.
Step 7: by Grouting Pipe in the interior slip casting of newly-increased steel pipe pile 5 maintenance.
Step 8: along the former tube-sinking cast-in-situ pile 3 outside excavation heatable adobe sleeping platforms of 1 time former foundation platform 2 bottom of original structure grade beam, the wide x height of the long x of size is 1000mmx1200mmx1500mm; After former foundation platform 2 sidewalls that expose are cleaned up, by design size, make the position of anchor hole and carry out mark, by designing requirement, bored anchor hole and cleaned out with electric percussion drill.
Step 9: the newly-increased anchor bar 6 of five long 680mm diameter phi 16mm is inserted to former foundation platform 2 according to construction requirement and bore in anchor hole, and pour into macromolecule resin cementing agent, and the anchorage length of newly-increased anchor bar 6 in former foundation platform 2 is 200mm, make newly-increased anchor bar 6 solid with former foundation platform 2 anchorings;
Step 10: by former foundation platform 2 sidewall dabbings and clean up.
Step 11: the design attitude assembling reinforcement of newly-increased concrete bearing platform 4 in former foundation platform 2 both sides, formwork after-pouring C25 concrete forms newly-increased concrete bearing platform 4, and the newly-increased wide x height of the long x of concrete bearing platform 4 size is 500mmx750mmx800mm.
Although disclosed embodiment as above, the embodiment that its content just adopts for the ease of understanding technical scheme of the present invention, is not intended to limit the present invention.Technician in any the technical field of the invention; do not departing under the prerequisite of disclosed core technology scheme; can in the form of implementing and details, make any modification and variation; but the protection domain that invention limits, the scope that still must limit with appending claims is as the criterion.
Claims (10)
1. a workshop foundation reinforcement means, comprise original structure grade beam (1), former foundation platform (2) and former tube-sinking cast-in-situ pile (3), it is upper that described original structure grade beam (1) is arranged at former foundation platform (2), and described former tube-sinking cast-in-situ pile (3) is anchored in former foundation platform (2) two bottom sides, also comprise newly-increased concrete bearing platform (4), newly-increased steel pipe pile (5) and newly-increased anchor bar (6), bearing stratum is goed deep in described newly-increased steel pipe pile (5) bottom, described newly-increased concrete bearing platform (4) is set up in newly-increased steel pipe pile (5) top, and described newly-increased concrete bearing platform (4) and newly-increased steel pipe pile (5) are arranged on former foundation platform (2) both sides simultaneously, the described newly-increased concrete bearing platform (4) of both sides and former foundation platform (2) anchor connection, wherein, in described newly-increased concrete bearing platform (4), be provided with newly-increased anchor bar (6), horizontally disposed newly-increased anchor bar (6) insert in former foundation platform (2) and with former foundation platform (2) anchor connection,
It is characterized in that: it is as follows specifically to reinforce step:
Step 1: add a layer position according to the old industrial premises standard width of a room in an old-style house, depth, floor height size and inside, determine that industrial premises original structure foundation bearing capacity is not enough or occur differential settlement position, and draw reinforcing drawing;
Step 2: take measurements with the invar tape degree of accuracy according to drawing and determine the position that increases steel pipe pile (5) newly;
Step 3: according to the position of newly-increased steel pipe pile (5) of determining at surface drilling;
Step 4: at the newly-increased steel pipe pile (5) of floor manufacture;
Step 5: vertically lay above-mentioned newly-increased steel pipe pile (5) in surface drilling;
Step 6: adopt φ 30PVC hard plastic tube as Grouting Pipe, once transfer to newly-increased steel pipe pile (5) bottom, and throw in the rubble coarse aggregate that particle diameter is 2-3cm in newly-increased steel pipe pile (5);
Step 7: by Grouting Pipe slip casting maintenance in newly-increased steel pipe pile (5);
Step 8: along former tube-sinking cast-in-situ pile (3) the outside excavation heatable adobe sleeping platform of the lower former foundation platform (2) of original structure grade beam (1) bottom, after former foundation platform (2) sidewall exposing is cleaned up, by design size, make the position of anchor hole and carry out mark, by designing requirement, bored anchor hole and cleaned out with electric percussion drill;
Step 9: will increase anchor bar (6) newly and insert former foundation platform (2) and bore in anchor hole, and pour into macromolecule resin cementing agent, and make newly-increased anchor bar (6) solid with former foundation platform (2) anchoring;
Step 10: by former foundation platform (2) sidewall dabbing and clean up;
Step 11: the design attitude assembling reinforcement of newly-increased concrete bearing platform (4) in former foundation platform (2) both sides, formwork after-pouring forms newly-increased concrete bearing platform (4).
2. the method for claim 1, is characterized in that: in described step 3, pore-forming facility adopt XJ-100 type geological drilling rig, aperture φ 168mm; During perforate, adopt the in advance premium mud retaining wall of preparation, through after back-up sand layer, adopt natural mud off, enter middle decomposed rock 0.5m, and get whole hole after rock core, adjust mud property, sediment at the bottom of cleaning hole.
3. the method for claim 1, it is characterized in that: in described step 4, newly-increased steel pipe pile (5) adopts GB I level Q235B shape steel tube, save long 6m, steel pipe on newly-increased steel pipe pile (5) overflows slurry hole at floor manufacture, it performs mark, gas cutting pore-forming with invar tape location.
4. the method for claim 1, it is characterized in that: in described step 5, newly-increased steel pipe pile (5) bottom interface adopts the φ 1.59mm seamless steel pipe of overcoat one joint long 25cm, thick 5mm, and upper lower ring hole full weld, steel pipe is down to after at the bottom of hole, hit reality with weight, pass through sediment and loosened soil at the bottom of hole.
5. the method for claim 1, is characterized in that: in described step 8, the wide x of the long x of the size of described heatable adobe sleeping platform is high=and 1000mmx1200mmx1500mm.
6. the method for claim 1, is characterized in that: in described step 9, described newly-increased anchor bar (6) is five, and length is 680mm, and diameter is φ 16mm.
7. the method for claim 1, is characterized in that: in described step 9, the anchorage length of described newly-increased anchor bar (6) in former foundation platform (2) is 200mm.
8. the method for claim 1, is characterized in that: in described step 11, the wide x of the long x of described newly-increased concrete bearing platform (4) size is high=and 500mmx750mmx800mm.
9. the method for claim 1, is characterized in that: in described step 11, the concrete grade of described newly-increased concrete bearing platform (4) is not less than C25.
10. the method for claim 1, it is characterized in that: between described newly-increased concrete bearing platform (4) and newly-increased steel pipe pile (5), be provided with the reinforcing bar running through up and down, its two ends are stretched into respectively in newly-increased concrete bearing platform (4) and newly-increased steel pipe pile (5).
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| CN201410007504.6A CN103741963B (en) | 2014-01-06 | 2014-01-06 | A kind of workshop foundation reinforcement means |
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Cited By (8)
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| CN105113387A (en) * | 2015-08-27 | 2015-12-02 | 苏州同尚工程设计咨询有限公司 | Reconstruction structure and construction method of bridge bearing platform |
| CN105350559A (en) * | 2015-11-27 | 2016-02-24 | 中国一冶集团有限公司 | Construction method suitable for emery structural ground of large factory building |
| CN106884443A (en) * | 2017-03-11 | 2017-06-23 | 中国二十二冶集团有限公司 | The construction method for grouting reinforcement that foundation bottom is come to nothing |
| CN108193721A (en) * | 2017-12-25 | 2018-06-22 | 佛山科学技术学院 | It is a kind of constructed for pile framing after to the method for pile test |
| CN109162210A (en) * | 2018-09-04 | 2019-01-08 | 广东和立土木工程有限公司 | For Bridge repair and reinforcement or widen the newly-increased pile base construction method of enlarging |
| CN109469087A (en) * | 2018-12-24 | 2019-03-15 | 南京科技职业学院 | Cesspool strengthening of foundation system and its construction method in a kind of industrial premises room |
| CN110273441A (en) * | 2019-06-17 | 2019-09-24 | 北京筑福建筑科学研究院有限责任公司 | A kind of old factory building foundation uses the structural strengthening and construction method of newly-increased steel-pipe pile and newly-increased concrete bearing platform |
| CN112921962A (en) * | 2021-01-25 | 2021-06-08 | 浙江鼎固建筑技术有限公司 | Pile foundation reinforcing method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105113387A (en) * | 2015-08-27 | 2015-12-02 | 苏州同尚工程设计咨询有限公司 | Reconstruction structure and construction method of bridge bearing platform |
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| CN109469087A (en) * | 2018-12-24 | 2019-03-15 | 南京科技职业学院 | Cesspool strengthening of foundation system and its construction method in a kind of industrial premises room |
| CN110273441A (en) * | 2019-06-17 | 2019-09-24 | 北京筑福建筑科学研究院有限责任公司 | A kind of old factory building foundation uses the structural strengthening and construction method of newly-increased steel-pipe pile and newly-increased concrete bearing platform |
| CN112921962A (en) * | 2021-01-25 | 2021-06-08 | 浙江鼎固建筑技术有限公司 | Pile foundation reinforcing method |
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