CN109371982A - A kind of construction method of basement bottom board support replacement - Google Patents
A kind of construction method of basement bottom board support replacement Download PDFInfo
- Publication number
- CN109371982A CN109371982A CN201811494971.0A CN201811494971A CN109371982A CN 109371982 A CN109371982 A CN 109371982A CN 201811494971 A CN201811494971 A CN 201811494971A CN 109371982 A CN109371982 A CN 109371982A
- Authority
- CN
- China
- Prior art keywords
- concrete
- basement
- support
- buttress
- support replacement
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
- E02D5/187—Bulkheads or similar walls made solely of concrete in situ the bulkheads or walls being made continuously, e.g. excavating and constructing bulkheads or walls in the same process, without joints
Abstract
The present invention provides a kind of construction methods of basement bottom board support replacement, it is excavated to basement foundation ditch bottom first, pea gravel concreten bed course is poured in bottom, pea gravel concreten bed course both ends offset with support pile and foundation pit side-wall respectively, pouring reinforcement concrete bottom plate above pea gravel concreten bed course；Cut that one end that reinforced concrete bottom plate and foundation pit side-wall offset, it cuts position and backfills plain concrete, pour buttress concrete above plain concrete, buttress concrete one end offsets with foundation pit side-wall, pre-buried reinforcing bar is inserted into above plain concrete in buttress concrete, and buttress concrete and plain concrete become an entirety；Fill concrete between gap between each floor plate exterior wall of basement and support pile；After the plain concrete strength of backfill reaches the intensity of design requirement, the support construction that basement foundation ditch needs support replacement is removed, completes the operation of bottom plate support replacement.The beneficial effects of the present invention are: engineering cost is low, easy to operate；Shorten the duration；The deformation for reducing foundation pit enclosure body improves the safety of construction.
Description
Technical field
The present invention relates to applying for architectural engineering Underground Construction technical field more particularly to a kind of basement bottom board support replacement
Work method.
Background technique
In Deep Thick Soft Ground excavation of foundation pit, building enclosure is often with piling wall combination inner support system.With repairing for hypogee
It builds, hypogee floor is successively constructed upwards with floor structure.Need gradually to remove at this time it is interim horizontally-supported, to guarantee foundation pit
Relatively it is stable usually replaced using constructure body structure it is horizontally-supported.If not using support replacement technology, fender post will be in
Long cantilever state is extremely unfavorable for foundation pit and stablizes.Support replacement technology is i.e. in the case where guaranteeing to stablize by certain technical substitutions
Support system guarantees that after removing inner support, foundation pit is still with good stability.The principle of support replacement technology is in inner support
After dismounting, part stress caused by foundation pit is undertaken or is passed to other force structures by support replacement component.In part, foundation pit is opened
It is shallower to dig depth, basement floor absolute altitude is higher and in the case where support replacement can not being carried out using floor, need to study a kind of new
Bottom plate support replacement method is to prevent support pile cantilever height is too long from the appearance of the case where basement foundation ditch moderate finite deformation occur.
Summary of the invention
To solve the above-mentioned problems, the present invention provides a kind of construction method of basement bottom board support replacement, a kind of basements
The construction method of bottom plate support replacement, mainly comprises the steps that
S1: being excavated to basement foundation ditch bottom, and basement foundation ditch bottom pours pea gravel concreten bed course, pea gravel concreten pad
Layer left and right ends offset with support pile and foundation pit side-wall respectively, and the pouring reinforcement concrete bottom plate above pea gravel concreten bed course；
S2: cutting that one end that reinforced concrete bottom plate and foundation pit side-wall offset, and cuts position and backfills plain concrete, in the plain concrete of backfill
Top pours buttress concrete, and buttress concrete one end offsets with foundation pit side-wall, and pre-buried reinforcing bar is inserted into buttress concrete
Above the plain concrete of backfill, buttress concrete and the plain concrete of backfill is made to become an entirety, meet basement foundation ditch load and by
Power demand；
S3: fill concrete between the gap between each floor plate exterior wall of basement and support pile and foundation pit side-wall, to keep
Basement foundation ditch is stablized；
S4: after the plain concrete strength of backfill reaches the intensity of design requirement, the support that basement foundation ditch needs support replacement is removed
Structure completes the operation of bottom plate support replacement.
Further, buttress concrete is trapezoidal shape.
Further, the length of the part reinforced concrete bottom plate cut is less than buttress concrete bottom length.
Further, what is be added in buttress concrete has reinforcing bar, the upper bottom of reinforcing bar upper end to buttress concrete, reinforcing bar lower end
Across the bottom of buttress concrete, it is inserted into the top of the plain concrete of backfill.
Further, it fills between the gap between each floor plate exterior wall of basement and support pile with reinforced concrete base plate strength phase
Same concrete.
Further, the concrete filled between the gap between each floor plate exterior wall of basement and support pile and foundation pit side-wall
With a thickness of 300-500mm.
Further, the concrete filled between the gap between each floor plate exterior wall of basement and support pile with a thickness of
500mm。
Further, the concrete filled between the gap between each floor plate exterior wall of basement and foundation pit side-wall with a thickness of
300mm。
Further, over time, the plain concrete of backfill can gradual drying solidification, wanted when backfilling plain concrete and reaching design
80% or more of intensity is sought, the support construction that basement foundation ditch needs support replacement is removed.
Further, when dismounting basement foundation ditch needs the support construction of support replacement, the connection sections between support are first all cut
Point, rezone the symmetrical support construction removed basement foundation ditch and need support replacement；The support of support replacement is needed in dismounting basement foundation ditch
While structure carry out internal force detection, at any time observe building enclosure whether deform and the sedimentation of peripheral path, cracking situation, with
Guarantee construction safety.
Technical solution provided by the invention has the benefit that engineering cost is low, easy to operate and safe；Shorten work
Phase；The deformation for reducing foundation pit enclosure body improves the safety of construction.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples, in attached drawing:
Fig. 1 is a kind of flow chart of the construction method of basement bottom board support replacement in the embodiment of the present invention；
Fig. 2 is insole board support changing structure for use schematic diagram of the embodiment of the present invention.
Specific embodiment
For a clearer understanding of the technical characteristics, objects and effects of the present invention, now control attached drawing is described in detail
A specific embodiment of the invention.
The embodiment provides a kind of construction methods of basement bottom board support replacement.
Referring to FIG. 1, Fig. 1 is a kind of flow chart of the construction method of basement bottom board support replacement in the embodiment of the present invention, tool
Body includes the following steps:
S1: being excavated to basement foundation ditch bottom, and basement foundation ditch bottom pours pea gravel concreten bed course, pea gravel concreten pad
Layer left and right ends offset with support pile and foundation pit side-wall respectively, and the pouring reinforcement concrete bottom plate above pea gravel concreten bed course, steel
Muscle concrete bottom plate left and right ends also offset with support pile and foundation pit side-wall respectively；
S2: cutting that one end that reinforced concrete bottom plate and foundation pit side-wall offset, and cuts position and backfills plain concrete, in the plain concrete of backfill
Top pours buttress concrete, and buttress concrete one end offsets with foundation pit side-wall, and pre-buried reinforcing bar is inserted into buttress concrete
Above the plain concrete of backfill, buttress concrete and the plain concrete of backfill is made to become an entirety, meet basement foundation ditch load and by
Power demand；
S3: fill concrete between the gap between each floor plate exterior wall of basement and support pile and foundation pit side-wall, to keep
Basement foundation ditch is stablized；
S4: after the plain concrete strength of backfill reaches the intensity of design requirement, the support that basement foundation ditch needs support replacement is removed
Structure completes the operation of bottom plate support replacement.
Wherein, buttress concrete is trapezoidal shape.The length of the part reinforced concrete bottom plate cut is gone to the bottom less than buttress concrete
It is long.What is be added in buttress concrete has reinforcing bar, and the upper bottom of reinforcing bar upper end to buttress concrete, reinforcing bar lower end passes through buttress concrete
Bottom, be inserted into the top of the plain concrete of backfill；The quantity that reinforcing bar is inserted into buttress concrete is more than the element for being inserted into backfill
Quantity in concrete.Filling is identical mixed with reinforced concrete base plate strength between gap between each floor plate exterior wall of basement and support pile
Solidifying soil.The concrete filled between gap between each floor plate exterior wall of basement and support pile with a thickness of 300-500mm.Underground
The concrete filled between gap between each floor plate exterior wall in room and support pile with a thickness of 500mm.Outside each floor plate of basement
The concrete filled between gap between wall and foundation pit side-wall with a thickness of 300mm, sandstone is inserted in remaining gap.With the time
Passage, the plain concrete of backfill can gradual drying solidification, reach 80% or more of design requirement intensity when backfilling plain concrete, dismounting underground
Room foundation pit needs the support construction of support replacement.When dismounting basement foundation ditch needs the support construction of support replacement, elder generation is all cut between support
Connecting node, rezone the symmetrical support construction removed basement foundation ditch and need support replacement；It is changed removing basement foundation ditch needs
Internal force detection is carried out while the support construction of support, observes whether deforming and the sedimentation of peripheral path, opening for building enclosure at any time
Situation is split, to guarantee construction safety.
Referring to FIG. 2, Fig. 2 is insole board support changing structure for use schematic diagram of the embodiment of the present invention, process as shown in connection with fig. 1, benefit
Former support construction is changed with bottom plate support changing structure for use shown in Fig. 2, removes basement foundation ditch original support construction, former support construction is
The horizontal inner supporting structure of armored concrete, base plate supporting structure shown in Fig. 2 include including trapezoidal buttress concrete, microlith coagulation
Soil padding, reinforced concrete bottom plate, side wall；Trapezoidal buttress concrete and the plain concrete of backfill enable to fender post cantilever height to reduce, right
It answers bending and deformation to reduce, guarantees the normal construction of external wall waterproof layer and protective layer, and quickly removed armored concrete
Horizontal inner supporting structure.The quick insertion of process, substantially reduces the duration；Present apparatus structure operation handy and safe, it is cheap.
The beneficial effects of the present invention are: engineering cost is low, easy to operate and safe；Shorten the duration；Reinforced concrete bottom plate and ladder
Shape knoll concrete, which links together maintaining pile and bottom plate, controls the deformation of foundation pit enclosure body, reduces foundation pit enclosure body
Deformation；Support pile cantilever pile length is also opposite to be reduced, and is conducive to deep pit monitor, is improved the safety of construction, greatly ensures
The safe and smooth progress of foundation pit construction.
The foregoing is merely presently preferred embodiments of the present invention, is not intended to limit the invention, it is all in spirit of the invention and
Within principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of construction method of basement bottom board support replacement, it is characterised in that: the following steps are included:
S1: being excavated to basement foundation ditch bottom, and basement foundation ditch bottom pours pea gravel concreten bed course, and pea gravel concreten bed course is left
Right both ends offset with support pile and foundation pit side-wall respectively, and the pouring reinforcement concrete bottom plate above pea gravel concreten bed course；
S2: cutting that one end that reinforced concrete bottom plate and foundation pit side-wall offset, and cuts position and backfills plain concrete, above the plain concrete of backfill
Buttress concrete is poured, buttress concrete one end offsets with foundation pit side-wall, and pre-buried reinforcing bar is inserted into backfill in buttress concrete
Plain concrete above, so that buttress concrete and the plain concrete of backfill is become an entirety, meet the load and stress need of basement foundation ditch
It asks；
S3: fill concrete between the gap between each floor plate exterior wall of basement and support pile and foundation pit side-wall, under retentively
Room foundation pit is stablized；
S4: after the plain concrete strength of backfill reaches the intensity of design requirement, removing the support construction that basement foundation ditch needs support replacement,
Complete the operation of bottom plate support replacement.
2. a kind of construction method of basement bottom board support replacement as described in claim 1, it is characterised in that: buttress concrete is ladder
Shape.
3. a kind of construction method of basement bottom board support replacement as described in claim 1, it is characterised in that: the part reinforcing bar cut
The length of concrete bottom plate is less than buttress concrete bottom length.
4. a kind of construction method of basement bottom board support replacement as described in claim 1, it is characterised in that: add in buttress concrete
What is entered has reinforcing bar, and the upper bottom of reinforcing bar upper end to buttress concrete, reinforcing bar lower end passes through the bottom of buttress concrete, is inserted into backfill
Plain concrete top.
5. a kind of construction method of basement bottom board support replacement as described in claim 1, it is characterised in that: each floor plate of basement
Identical concrete is filled with reinforced concrete base plate strength between gap between exterior wall and support pile.
6. a kind of construction method of basement bottom board support replacement as claimed in claim 5, it is characterised in that: each floor plate of basement
The concrete filled between gap between exterior wall and support pile and foundation pit side-wall with a thickness of 300-500mm.
7. a kind of construction method of basement bottom board support replacement as claimed in claim 6, it is characterised in that: each floor plate of basement
The concrete filled between gap between exterior wall and support pile with a thickness of 500mm.
8. a kind of construction method of basement bottom board support replacement as claimed in claim 6, it is characterised in that: each floor plate of basement
The concrete filled between gap between exterior wall and foundation pit side-wall with a thickness of 300mm.
9. a kind of construction method of basement bottom board support replacement as described in claim 1, it is characterised in that: with pushing away for time
Move, the plain concrete of backfill can gradual drying solidification, reach 80% or more of design requirement intensity when backfilling plain concrete, dismounting basement
Foundation pit needs the support construction of support replacement.
10. a kind of construction method of basement bottom board support replacement as described in claim 1, it is characterised in that: remove basement base
When hole needs the support construction of support replacement, the connecting node between support is first all cut, the symmetrical basement foundation ditch of removing that rezones needs
Want the support construction of support replacement；Internal force detection is carried out while removing basement foundation ditch and needing the support construction of support replacement, is seen at any time
Examine building enclosure whether deform and the sedimentation of peripheral path, cracking situation, to guarantee construction safety.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811494971.0A CN109371982A (en) | 2018-12-07 | 2018-12-07 | A kind of construction method of basement bottom board support replacement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811494971.0A CN109371982A (en) | 2018-12-07 | 2018-12-07 | A kind of construction method of basement bottom board support replacement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109371982A true CN109371982A (en) | 2019-02-22 |
Family
ID=65373780
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811494971.0A Withdrawn CN109371982A (en) | 2018-12-07 | 2018-12-07 | A kind of construction method of basement bottom board support replacement |
Country Status (1)
| Country | Link |
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| CN (1) | CN109371982A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112982427A (en) * | 2021-03-22 | 2021-06-18 | 云南建投第一勘察设计有限公司 | Reinforcement construction method for foundation pit dangerous case in soft soil area |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102002953A (en) * | 2010-12-02 | 2011-04-06 | 上海市第四建筑有限公司 | Method for changing support of foundation pit enclosing rib plates |
| CN201809774U (en) * | 2010-09-16 | 2011-04-27 | 中建三局建设工程股份有限公司 | Foundation ditch support replacement and inner support removal construction structure |
| CN103255772A (en) * | 2013-05-27 | 2013-08-21 | 天津三建建筑工程有限公司 | Construction method optimizing deep foundation pit changing supporting construction sequences |
| CN105089061A (en) * | 2015-08-11 | 2015-11-25 | 泰兴市第一建筑安装工程有限公司 | Ultra-deep foundation pit supporting method |
-
2018
- 2018-12-07 CN CN201811494971.0A patent/CN109371982A/en not_active Withdrawn
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201809774U (en) * | 2010-09-16 | 2011-04-27 | 中建三局建设工程股份有限公司 | Foundation ditch support replacement and inner support removal construction structure |
| CN102002953A (en) * | 2010-12-02 | 2011-04-06 | 上海市第四建筑有限公司 | Method for changing support of foundation pit enclosing rib plates |
| CN103255772A (en) * | 2013-05-27 | 2013-08-21 | 天津三建建筑工程有限公司 | Construction method optimizing deep foundation pit changing supporting construction sequences |
| CN105089061A (en) * | 2015-08-11 | 2015-11-25 | 泰兴市第一建筑安装工程有限公司 | Ultra-deep foundation pit supporting method |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112982427A (en) * | 2021-03-22 | 2021-06-18 | 云南建投第一勘察设计有限公司 | Reinforcement construction method for foundation pit dangerous case in soft soil area |
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| WW01 | Invention patent application withdrawn after publication |
Application publication date: 20190222 |
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| WW01 | Invention patent application withdrawn after publication |