CN102444130B - Support replacing construction method in deep foundation pit project - Google Patents
Support replacing construction method in deep foundation pit project Download PDFInfo
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- CN102444130B CN102444130B CN201110321079.4A CN201110321079A CN102444130B CN 102444130 B CN102444130 B CN 102444130B CN 201110321079 A CN201110321079 A CN 201110321079A CN 102444130 B CN102444130 B CN 102444130B
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Abstract
The invention discloses a support replacing construction method in a deep foundation pit project, which includes the step 1) that first support replacing ribbed plates are arranged at intervals between a basement concrete bottom plate and a foundation pit support structure, the outer side of each first support replacing ribbed plate is connected with the inner side of the foundation pit support structure, and the inner side of each first support replacing ribbed plate is connected with the basement concrete bottom plate; the first support replacing ribbed plates and the basement concrete bottom plate are simultaneously constructed, after the basement concrete bottom plate and the first support replacing ribbed plates are demoulded, the lowest temporary support at the bottom of the foundation pit is dismounted, and earth is filled and tamped between the neighboring first support replacing ribbed plates; the support replacing ribbed plates include two kinds, namely, horizontal concrete ribbed plates and T-shaped concrete ribbed plates; and middle vertical plates of the T-shaped concrete ribbed plates are vertical to the foundation pit support structure. The invention also discloses another quick support replacing method by adopting vertical concrete ribbed plates as the support ribbed plates. The invention can rather easily control the construction time limit, quality and safety, and is suitable for the support system of the ultra-deep and ultra-big foundation pits.
Description
Technical field
The present invention relates to a kind of job practices of deep foundation ditch support replacement, particularly relate to a kind of super dark super large foundation pit construction fast support replacing job practices.
Background technology
Support replacement in deep-foundation pit engineering, to take under given conditions certain technical measures progressively to replace the inner supporting structure system of performance temporary supporting effect, thereby after guaranteeing provisional bracing demolition, engineering construction can continue safety and successfully carry out, and its essence is safe and orderly adjustment, transfer and the reallocation of stress.
Support replacement principle: allow soldier pile pass to the third party with enough supporting capacitys by Force transmission parts because of the part stress that bracing demolition produces, thereby reach new stress balance.It,, except adopting rigid strutting piece (diagonal brace, horizontal support) connection soldier pile and basement structure to control distortion, realize the stress transmission, also can adopt back-filling way to realize.In this transfer process, go along with sb. to guard him system itself and still bear suitable support action.
At present, the deep foundation ditch support replacement has two kinds of common modes: a kind of is that diagonal brace is set, short, less investment of duration, but the strong point is selected difficulty, is difficult to lay (especially building four corners position) comprehensively, the mass action weak effect of support replacement, easily destroyed, and often because soldier pile and body of wall distance is short, diagonal brace often needs to be connected with basement concrete base plate bracket through body of wall, can increase the waterproof construction difficulty like this, remove diagonal brace and also can incur loss through delay the duration.Another kind is directly to adopt horizontal stiffness member support replacement coupling beam to carry out support replacement, and the stress of soldier pile is finally realized by the building beam slab.Its advantage is that stressed effect is good, construction is simply again without carrying out Demolition Construction, therefore comparatively suitable in tighter engineering of duration.Owing to by cast-in-place building beam slab, bearing foundation ditch internal force, the safety of structure of engineering itself is had higher requirement, must take necessary technical measures, to guarantee carrying out smoothly of construction.The conventional construction method is after underplate concrete has been watered, stripping, by the space backfill earthwork between base plate and soldier pile, (another kind of backfill is that metaling is cheated interior support replacement backfill, be characterized in the stressed good uniformity of load transfering strip, but during practice of construction, often the waterproof construction intervention is more late, and the backfill compactness is difficult to control, internal force transmission to larger foundation ditch can't guarantee, so backfill is used as, and load transfering strip only does to assist.) and compacting, then one thick concrete horizontal endless belt of 250-400MM of pouring, as support replacement, after this part concrete reaches designing requirement intensity, just can carry out the dismounting operation of temporary supporting system above backfill.But for Deep Foundation Pit or the extremely complicated engineering of structure stress, this method construction level complexity, the practical operation difficulty, duration is longer, and foundation pit system structural safety risk probability obviously increases, seriously affect the foundation ditch duration, so just cause the support replacement technology is the important outstanding problem perplexed in deep foundation pit construction always.
Summary of the invention
The present invention provides two kinds of fast support replacing job practicess in deep-foundation pit engineering for solving the technical problem existed in known technology, these two kinds of job practicess can be controlled construction period and construction quality and safety with comparalive ease, support system that can suitable super dark super large foundation ditch.
The present invention for a technical scheme that solves the technical problem that exists in known technology and take is: the fast support replacing job practices in a kind of deep-foundation pit engineering comprises step 1) construction of first support replacement floor:
First support replacement floor is arranged between basement concrete base plate and foundation pit supporting construction, and for spaced a plurality of, the outside of each first support replacement floor is connected with the inboard of foundation pit supporting construction, inboardly with basement concrete base plate, is connected;
First support replacement floor and basement concrete base plate are constructed simultaneously, after basement concrete base plate and the form removal of first support replacement floor, remove the most lower one temporary supporting in foundation ditch bottom, the backfill earthwork compacting between adjacent first support replacement floor;
Described support replacement floor has two kinds, and the first is horizontal concrete floor, and the second is T shape concrete floor, and the middle riser of T shape concrete floor is vertical with foundation pit supporting construction.
Above-mentioned job practices also comprises step 2) construction of second support replacement floor:
Second support replacement floor is arranged between the top board and foundation pit supporting construction of the bottom one deck of basement, and for spaced a plurality of, the outside of each second support replacement floor is connected with the inboard of foundation pit supporting construction, and inboard is connected with the wallboard of basement;
The wallboard of all second support replacement floors and basement is constructed simultaneously; Before the construction of second support replacement floor, in first support replacement floor earth fill last time compacting;
After the wallboard and the form removal of second support replacement floor of basement, remove the second temporary supporting of foundation ditch, the backfill earthwork compacting between adjacent second support replacement floor.
Above-mentioned job practices also comprises step 3) construction of the 3rd road support replacement floor:
The 3rd road support replacement floor is arranged between basement one deck following top board and foundation pit supporting construction, and for spaced a plurality of, the outside of each the 3rd road support replacement floor is connected with the inboard of foundation pit supporting construction, and inboard is connected with the wallboard of basement; The wallboard of all the 3rd road support replacement floors and basement is constructed simultaneously, construction sequence and step 2) identical.
Another technical scheme that the present invention takes for the technical problem existed in the solution known technology is: the fast support replacing job practices in a kind of deep-foundation pit engineering, adopt vertical concrete floor as the support replacement floor, vertical concrete floor is arranged between basement wallboard and foundation pit supporting construction, for spaced a plurality of, the outside of each vertical concrete floor is connected with the inboard of foundation pit supporting construction, and inboard is connected with the basement wallboard;
Vertical concrete floor and basement wallboard are constructed simultaneously, after basement wallboard and vertical concrete floor form removal, remove the temporary supporting of corresponding site, the backfill earthwork compacting between adjacent vertical concrete floor.
Advantage and good effect that the present invention has are: adopt the floor support replacement, and floor and basement concrete base plate/wallboard simultaneously formwork, build simultaneously, maintenance simultaneously, when base plate/R.C. wall board reaches intensity, the support replacement floor has also reached intensity, naturally also just played the effect of support replacement, the underground structure of can constructing continuously needn't be waited for backfilling of earthwork, does not affect the duration of underground construction, the duration effect manifests outstanding, has embodied significantly the fast support replacing effect; Can control with comparalive ease construction period and workmanship and production safety, the support system of suitable super dark super large foundation ditch.And procedure arrangement and coordination, constructability are convenient in the present invention; Work progress is safe and reliable, is convenient to safety management.
The accompanying drawing explanation
The schematic diagram that Fig. 1 is the horizontal concrete floor applied of the present invention;
The partial plan layout that Fig. 2 is application level concrete floor construction of the present invention;
The elevation that Fig. 3 is application level concrete floor construction of the present invention;
Fig. 4 is the vertical concrete floor schematic diagram that the present invention applies;
Fig. 5 is the partial plan layout that the present invention applies vertical concrete floor construction;
Fig. 6 is the elevation that the present invention applies vertical concrete floor construction;
The schematic diagram that Fig. 7 is the T shape concrete floor applied of the present invention;
The partial plan layout that Fig. 8 is the construction of the present invention's application T shape concrete floor;
The elevation that Fig. 9 is the construction of the present invention's application T shape concrete floor.
The specific embodiment
For further understanding summary of the invention of the present invention, Characteristic, hereby exemplify following examples, and coordinate accompanying drawing to be described in detail as follows:
Fast support replacing job practices in a kind of deep-foundation pit engineering:
1) construction of first support replacement floor:
First support replacement floor 12 is arranged between basement concrete base plate 5 and foundation pit supporting construction 1, and for spaced a plurality of, the outside of each first support replacement floor 12 is connected with the inboard of foundation pit supporting construction 1, inboardly with basement concrete base plate 5, is connected;
First support replacement floor 12 is constructed with basement concrete base plate 5 simultaneously, with 5 while of basement concrete base plate formwork, build simultaneously, maintenance simultaneously, when treating that underplate concrete reaches strength of mould stripping, the support replacement floor has also reached strength of mould stripping, has played supporting role, can arrange the dismounting operation of temporary supporting system.Corresponding temporary supporting herein is the most lower one temporary supporting in foundation ditch bottom, the backfill earthwork compacting between adjacent first support replacement floor 12.
2) construction of second support replacement floor:
Second support replacement floor 22 is arranged between the top board 6 and foundation pit supporting construction 1 of the bottom one deck of basement, for spaced a plurality of, the outside of each second support replacement floor 22 is connected with the inboard of foundation pit supporting construction 1, and inboard is connected with the wallboard 4 of basement;
All second support replacement floors 22 are constructed with the wallboard 4 of basement simultaneously; While constructing basement wallboard 4, second support replacement floor 22 and 4 while of basement wallboard formwork are built concrete simultaneously, maintenance simultaneously, and after reaching strength of mould stripping, this floor 22 has played supporting role, can arrange the dismounting operation of temporary supporting system.The second temporary supporting that corresponding temporary supporting herein is foundation ditch, the backfill earthwork 3 compacting between adjacent second support replacement floor 22.Before the construction of second support replacement floor, in first support replacement floor earth fill last time compacting.
3) construction of the 3rd road support replacement floor:
The 3rd road support replacement floor is arranged between basement one deck following top board and foundation pit supporting construction, and for spaced a plurality of, the outside of each the 3rd road support replacement floor is connected with the inboard of foundation pit supporting construction, and inboard is connected with the wallboard of basement; The wallboard of all the 3rd road support replacement floors and basement is constructed simultaneously; Construction sequence and step 2) identical.The temporary supporting of corresponding the 3rd road support replacement floor is generally last one temporary supporting of foundation ditch.So far whole support replacements of foundation ditch have been completed.
In above-mentioned steps, between the adjacent floor of twice up and down, be the also earthwork 3 of compacting of backfill.
As for several roads of needs support replacement, should determine according to the concrete condition of foundation ditch, for example, basement only has one deck, only needs completing steps 1) get final product; Basement has two layers, only needs completing steps 1) and step 2) get final product; Basement has three layers, need to look concrete condition and determine whether need to proceed to step 3).
Above-mentioned support replacement floor has two kinds of structures:
The first is horizontal concrete floor, for building the horizontal concrete plate of formation; The second is T shape concrete floor, and in the middle of it, riser is vertical with foundation pit supporting construction.
Fast support replacing job practices in a kind of deep-foundation pit engineering: the method adopts vertical concrete floor as the support replacement floor, and it is the vertical concrete plate vertical with foundation pit supporting construction 1 of building formation.
Although the above is described the preferred embodiments of the present invention by reference to the accompanying drawings; but the present invention is not limited to the above-mentioned specific embodiment; the above-mentioned specific embodiment is only schematic; be not restrictive; those of ordinary skill in the art is under enlightenment of the present invention; not breaking away from the scope situation that aim of the present invention and claim protect, can also make a lot of forms, within these all belong to protection scope of the present invention.
Claims (1)
1. the fast support replacing job practices in a deep-foundation pit engineering, it is characterized in that, adopt vertical concrete floor as the support replacement floor, vertical concrete floor is arranged between basement wallboard and foundation pit supporting construction, vertical concrete floor is vertical with foundation pit supporting construction, for spaced a plurality of, the outside of each vertical concrete floor is connected with the inboard of foundation pit supporting construction, inboardly with the basement wallboard, is connected;
Vertical concrete floor and basement wallboard are constructed simultaneously, after basement wallboard and vertical concrete floor form removal, remove the temporary supporting of corresponding site, the backfill earthwork compacting between adjacent vertical concrete floor.
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| CN201110321079.4A CN102444130B (en) | 2011-10-20 | 2011-10-20 | Support replacing construction method in deep foundation pit project |
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| CN201110321079.4A CN102444130B (en) | 2011-10-20 | 2011-10-20 | Support replacing construction method in deep foundation pit project |
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| CN102444130B true CN102444130B (en) | 2014-01-01 |
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Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103015432B (en) * | 2012-12-07 | 2014-12-17 | 天津住宅集团建设工程总承包有限公司 | Construction method for changing steel pipe supports of ramp foundation pit |
| CN104141310B (en) * | 2013-05-07 | 2017-04-26 | 上海市政工程设计研究总院（集团）有限公司 | Method for constructing assembly type pre-stress fish-belly sill internal support system |
| CN103572763B (en) * | 2013-11-18 | 2015-08-26 | 中建二局第三建筑工程有限公司 | Large-span steel supports pattern foundation pit supporting structure Demolition Construction method |
| CN103603360A (en) * | 2013-11-27 | 2014-02-26 | 上海建工七建集团有限公司 | Foundation pit enveloping method |
| CN104032744B (en) * | 2014-05-21 | 2016-05-04 | 中国建筑第八工程局有限公司 | Support replacement construction method in the engineering of group hole |
| CN105332380B (en) * | 2015-11-16 | 2017-04-12 | 上海建工五建集团有限公司 | Strut changing structure and method for underground building |
| CN109944253B (en) * | 2019-03-26 | 2024-06-14 | 中国建筑第八工程局有限公司 | Reinforced concrete blade wall supporting system and deep foundation pit support changing construction method thereof |
| CN113550326B (en) * | 2021-08-12 | 2022-10-11 | 中建八局第二建设有限公司 | Foundation pit support removing and basement structure and construction method thereof |
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Effective date of registration: 20200323 Address after: 300451 No. 72, Hangzhou Road, Binhai New Area, Tianjin Co-patentee after: CHINA CONSTRUCTION SIXTH ENGINEERING DIVISION Corp.,Ltd. Patentee after: CHINA CONSTRUCTION SIXTH ENGINEERING BUREAU INSTALLATION ENGINEERING Co.,Ltd. Address before: 300456 No. 75, Xingang Road, Tanggu District, Tianjin Co-patentee before: CHINA CONSTRUCTION SIXTH ENGINEERING DIVISION Corp.,Ltd. Patentee before: CHINA CONSTRUCTION SIXTH ENGINEERING DIVISION NO.3 CONSTRUCTION ENGINEERING Co.,Ltd. |
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Address after: 710075 room 11001, 10th floor, building 3, Fengxi new town headquarters economic Park project, Xixian New District, Xi'an, Shaanxi Province Patentee after: China Construction Sixth Engineering Bureau Northwest Construction Co.,Ltd. Patentee after: CHINA CONSTRUCTION SIXTH ENGINEERING DIVISION Corp.,Ltd. Address before: No. 72 Hangzhou Road, Tianjin Binhai New Area, 300451 Patentee before: CHINA CONSTRUCTION SIXTH ENGINEERING BUREAU INSTALLATION ENGINEERING Co.,Ltd. Patentee before: CHINA CONSTRUCTION SIXTH ENGINEERING DIVISION Corp.,Ltd. |
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Address after: 710075 room 11001, 10th floor, building 3, Fengxi new town headquarters economic Park project, Xixian New District, Xi'an, Shaanxi Province Patentee after: The First Construction Co.,Ltd. of China Construction Sixth Engineering Bureau Patentee after: CHINA CONSTRUCTION SIXTH ENGINEERING DIVISION Corp.,Ltd. Address before: 710075 room 11001, 10th floor, building 3, Fengxi new town headquarters economic Park project, Xixian New District, Xi'an, Shaanxi Province Patentee before: China Construction Sixth Engineering Bureau Northwest Construction Co.,Ltd. Patentee before: CHINA CONSTRUCTION SIXTH ENGINEERING DIVISION Corp.,Ltd. |