CN109989406A - Foundation pit support replacement construction - Google Patents
Foundation pit support replacement construction Download PDFInfo
- Publication number
- CN109989406A CN109989406A CN201711489700.1A CN201711489700A CN109989406A CN 109989406 A CN109989406 A CN 109989406A CN 201711489700 A CN201711489700 A CN 201711489700A CN 109989406 A CN109989406 A CN 109989406A
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- China
- Prior art keywords
- support beam
- inner support
- support
- foundation pit
- basement
- 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
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- 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
Abstract
The present invention relates to foundation pit construction technical fields, disclose a kind of foundation pit support replacement construction, comprising the following steps: backfill is filled between outer wall of basement and support pile；Support plate is poured in the backfill immediately below the inner support beam that starting is removed, support plate one end is connect with support pile, is connect on the outside of the other end and outer wall of basement；Multiple supporting points are chosen around outer wall of basement side, measure the spacing dimension between the outer wall of basement and support pile at supporting point, it crosses in the inner support beam that starting is removed and cuts the support beam section that interception corresponds to spacing dimension, support beam section is installed at corresponding supporting point, the support plate of supporting point is served as using the support beam section cut down, the removal step of remaining inner support beam is identical as the removal step of inner support beam that starting is removed.The support beam section that inner support beam is cut down is converted into support plate, pair of interior support beam is made full use of, to reduce the generation of building castoff in support replacement work progress.
Description
Technical field
The present invention relates to foundation pit construction technical fields, more specifically, it relates to a kind of foundation pit support replacement construction.
Background technique
Using the foundation pit of inner support form, internal support of foundation pit beam absolute altitude is Chong Die with basement roof, after supporting beam must being removed,
It can carry out the construction of basement roof.Inner support could be removed by being generallyd use after support replacement form reinforces foundation pit in construction
Beam.
Foundation pit support replacement construction at a kind of ramp abnormity is disclosed in the Chinese patent that patent publication No. is CN102953385A
Method, by pouring support replacement beam between ramp interior wall and ramp exterior wall；Then is backfilled between support pile and ramp exterior wall
One layer of backfill and second layer backfill are arranged first layer plain concrete and convert between first time backfill and second of backfill
Strip；After support replacement beam concrete reaches some strength, interior support system is removed.The construction method keeps support-replacing system stress balance steady
Determine, there is enough intensity, rigidity, it is ensured that the balanced power transmission of the support replacement construction at the special rotating angle of basement ramp and rigidity are stablized
Safety.
But, however it remains following problems: in work progress, the inner support beam removed all can directly discard outward transport,
There is no pair of interior support beam to be made full use of, increases the generation of building castoff in work progress.
Summary of the invention
The object of the present invention is to provide a kind of foundation pit support replacement constructions, can be made full use of with pair of interior support beam, with
Reduce the generation of building castoff in support replacement work progress.
Above-mentioned technical purpose of the invention has the technical scheme that
A kind of foundation pit support replacement construction, comprising the following steps:
A, backfill is filled between outer wall of basement and support pile；
B, the falsework for being used to support inner support beam is set up below inner support beam；
C, support plate being poured in the backfill immediately below the inner support beam that starting is removed, support plate one end is connect with support pile,
It is connect on the outside of the other end and outer wall of basement；Multiple supporting points are chosen around outer wall of basement side, measure the underground at supporting point
Spacing dimension between room exterior wall and support pile, crossing in the inner support beam that starting is removed and cutting interception corresponds to distance ruler
Support beam section is installed at corresponding supporting point, serves as supporting point using the support beam section cut down by very little support beam section
Support plate, the removal step of remaining inner support beam is identical as the removal step of inner support beam that starting is removed；
D, after the completion of inner support beam is removed, falsework is removed.
By using above-mentioned technical proposal, when ensuring dismounting inner support beam, foundation pit is in the premise of the state of safety and stability
Under, in addition to the inner support beam that starting is removed needs to pour support plate in advance before dismounting, the dismounting of remaining inner support beam is directly sharp
Support plate is served as with the support beam section cut down, support pile is supported using support plate and outer wall of basement, prevents base
Hole collapses；The inner support beam for needing to transport outward waste treatment originally is made full use of simultaneously, reduces building castoff in work progress
It generates, it is environmentally protective；The setting of support replacement steel beam, column, has saved construction material in a large amount of cast-in-place support plates of reduction simultaneously, foundation pit
And construction cost；It supports beam section to be directly changed into support plate simultaneously, reaches design strength without waiting for cast-in-place support board concrete,
Substantially increase speed of application.
Preferably, supporting point is distributed with immediately below the inner support beam.
By using above-mentioned technical proposal, the branch of inner support beam is preferably replaced using the support plate immediately below inner support beam
Stress suffered by inner support beam, can preferably be transferred on outer wall of basement by support effect, be removed with reaching reduction inner support beam
Foundation pit deformation degree in journey.
Preferably, it in the step c, when removing inner support beam, is first mounted on immediately below inner support beam using support plate
After at supporting point, then the inner support beam right above support plate is cut and disassembled.
By using above-mentioned technical proposal, internal force suffered by inner support beam is transferred to underground by support plate using support plate
After on the exterior wall of room, then pair of interior support beam is cut and disassembled, and prevents foundation pit collapse, is guaranteed in inner support beam demolishing process at foundation pit
In the state for stablizing safety.
Preferably, in the step c, inner support beam dismounting sequence is: the inner support beam of Xian Chai foundation pit corner, after tear base open
Cheat the inner support beam at middle part.
By using above-mentioned technical proposal, the inner support beam stress of corner is smaller, the inner support beam stress in the middle part of foundation pit
It is larger, guarantee that foundation pit is in the state of safety and stability, while reducing foundation pit deformation degree in inner support beam demolishing process.
Preferably, in the step c, when removing the inner support beam with the support of eight words, first by eight words of inner support beam end
Support is disconnected with purlin, then the bar that links between inner support beam is removed, and then disconnects inner support beam and purlin.
By using above-mentioned technical proposal, slows down the release of stress during removing inner support beam, prevents foundation pit collapse,
Reduce foundation pit deformation degree.
Preferably, the cutting mode of inner support beam is the cutting of diamond-wire saw cutting machine, including following step in the step c
It is rapid:
S1, segmentation cutting line is divided in inner support beam, with drilling machine in segmentation cutting line intersection holes drilled through, to connect for wearing
The saw band of diamond-wire saw cutting machine；
S2, diamond-wire saw cutting machine is placed in inner support beam, will be worn on the saw band connected and diamond-wire saw cutting machine
After connector connection, water pipe is opened, water flow size is adjusted, saw band is tightened and cut by controller.
By using above-mentioned technical proposal, using the construction of concrete cutting special equipment diamond-wire saw cutting machine cutting
Method, speed of application is fast, dust pollution is relatively fewer, reduces construction noise and reduces environmental pollution.
Preferably, in the step c, when the case where upper underbeam overlapping occurs in inner support beam, in the inner support beam of pre-demolition
Side builds horizontal bracket, and the support beam section of well cutting is transferred on horizontal bracket, will support beam section lifting after being adjusted
It is installed to supporting point.
By using above-mentioned technical proposal, the case where tiltedly hanging is prevented, the support beam section safety jaw cut down is gone out
And be transferred to supporting point and installed, it prevents from supporting beam section to fall in hoisting process.
Preferably, using the gap of concrete water cement mortar filling support plate and outer wall of basement junction.
By using above-mentioned technical proposal, it connect support plate with outer wall of basement more close, preferably by base
In the stress transfer to outer wall of basement in hole.
Preferably, inclined support bar is installed on outer wall of basement, inclined support bar upper end is fixed with outer wall of basement, lower end with
Basement bottom board is fixed.
By using above-mentioned technical proposal, crosses inclined support bar and outer wall of basement is supported, prevent outer wall of basement from collapsing
It collapses.
In conclusion the invention has the following advantages:
1, stable support system is made up of support plate, outer wall of basement and inclined support bar, shifts the stress in inner support beam
Afterwards, then pair of interior support beam is removed, and guarantees that foundation pit is in the state for stablizing safety in inner support beam demolishing process, reduces foundation pit
Deformation extent；
2, the support beam section cut down using inner support beam serves as support plate, makes full use of and needs to transport outward waste treatment originally
Inner support beam reduces the generation of building castoff in work progress, environmentally protective；A large amount of cast-in-place support plates, foundation pit are reduced simultaneously
The setting of interior support replacement steel beam, column, has saved construction material and construction cost；Beam section is supported to be directly changed into support plate, nothing simultaneously
It needs to wait for cast-in-place support board concrete and reaches design strength, substantially increase speed of application；
3, when removing inner support beam, the inner support beam of the lesser foundation pit corner of stress is first removed, it is biggish then to remove stress
Inner support beam in foundation pit guarantees that foundation pit is in the state of safety and stability, while reducing foundation pit in inner support beam demolishing process and becoming
Shape degree；
4, using the construction method of concrete cutting special equipment diamond-wire saw cutting machine cutting, speed of application is fast, fugitive dust is dirty
It contaminates relatively fewer, reduction construction noise and reduces environmental pollution；
5, when the case where upper underbeam overlapping occurs in inner support beam, the support beam section cut down is first transferred to horizontal bracket up-regulation
It is then transferred to supporting point after flat, prevents the case where tiltedly hanging, prevents from supporting beam section to fall in hoisting process.
Detailed description of the invention
Fig. 1 is the scheme of installation of foundation pit support replacement construction in the present embodiment；
Fig. 2 is the schematic top plan view of foundation pit in the present embodiment.
Appended drawing reference: 1, outer wall of basement；2, support pile；3, backfill；4, inner support beam；5, foundation pit；6, falsework；
7, support plate；8, inclined support bar；9, the first supporting beam；10, the second supporting beam；11, third supporting beam；12, eight words support；13, it encloses
Purlin；14, bar is linked；15, basement bottom board.
Specific embodiment
Below in conjunction with attached drawing, invention is further described in detail.
This specific embodiment is only explanation of the invention, is not limitation of the present invention, those skilled in the art
Member can according to need the modification that not creative contribution is made to the present embodiment after reading this specification, but as long as at this
All by the protection of Patent Law in the scope of the claims of invention.
A kind of foundation pit support replacement construction, as shown in Figure 1, including the following steps
A, backfill 3 is filled between outer wall of basement 1 and support pile 2；
B, the falsework 6 for being used to support inner support beam 4 is set up below inner support beam 4；
C, support plate 7,7 one end of support plate and support pile 2 are poured in the backfill 3 immediately below the inner support beam 4 that starting is removed
It connects, is connected on the outside of the other end and outer wall of basement 1；
Multiple supporting points are chosen around 1 side of outer wall of basement, are measured between the outer wall of basement 1 and support pile 2 at supporting point
Spacing dimension crosses in the inner support beam 4 that starting is removed and cuts the support beam section that interception corresponds to spacing dimension, will support
Beam section is installed at corresponding supporting point, and the support plate 7 of supporting point, remaining inner support are served as using the support beam section cut down
The removal step of beam 4 is identical as the removal step of inner support beam 4 that starting is removed；
D, after the completion of inner support beam 4 is removed, falsework 6 is removed.
When ensuring dismounting inner support beam 4, foundation pit 5 is in the state of safety and stability, except the inner support beam 4 that starting is removed exists
It needs to pour in advance outside support plate 7 before dismounting, the dismounting of remaining inner support beam 4 is directly served as using the support beam section cut down
Support plate 7 makes full use of the inner support beam 4 for needing to transport outward waste treatment originally, reduces the production of building castoff in work progress
It is raw, it is environmentally protective, while reduce a large amount of cast-in-place support plates 7, in foundation pit 5 support replacement steel beam, column setting, saved construction material
And construction cost, while beam section being supported to be directly changed into support plate 7, it is strong to reach design without waiting for cast-in-place 7 concrete of support plate
Degree, substantially increases speed of application.
Supporting point is distributed with immediately below inner support beam 4, the support plate 7 immediately below inner support beam 4 is along 4 length of inner support beam
Direction setting.The supporting role that inner support beam 4 is preferably replaced using the support plate 7 immediately below inner support beam 4, can be by inner support
Stress suffered by beam 4 is preferably transferred on outer wall of basement 1, reduces the deformation of foundation pit 5 journey in 4 demolishing process of inner support beam to reach
Degree.
In step c, after being first mounted on using support plate 7 at the supporting point of 4 underface of inner support beam, then to support plate 7
The inner support beam 4 of surface is cut and disassembled.Internal force suffered by inner support beam 4 is transferred to by support plate 7 using support plate 7
After on outer wall of basement 1, then pair of interior support beam 4 is cut and disassembled, and prevents foundation pit 5 from collapsing, and guarantees 4 demolishing process of inner support beam
Middle foundation pit 5 is in the state for stablizing safety.
In step c, when the case where upper underbeam overlapping occurs in inner support beam 4, water is built in 4 side of inner support beam of pre-demolition
The support beam section of well cutting is transferred on horizontal bracket and after being leveled by flat bracket by loop wheel machine, will be supported by loop wheel machine
Beam section is lifted to supporting point and is installed.The case where tiltedly hanging is prevented, the support beam section safety jaw cut down is gone out and turned
It moves on to supporting point to be installed, prevents from supporting beam section to fall in hoisting process.
Support plate 7 and the gap of 1 junction of outer wall of basement are filled using concrete water cement mortar.Make support plate 7 and ground
Lower room exterior wall 1 connects more close, preferably will be in the stress transfer of foundation pit 5 to outer wall of basement 1.
Inclined support bar 8 is installed on outer wall of basement 1,8 upper end of inclined support bar and outer wall of basement 1 are fixed, lower end and ground
Lower room bottom plate 15 is fixed, and 8 upper end of inclined support bar is corresponding with supporting point.Outer wall of basement 1 is supported by inclined support bar 8,
Prevent outer wall of basement 1 from collapsing；One important component of the inclined support bar 8 as stress suffered by transfer inner support beam 4, should be according to existing
Actual conditions calculate the quantity for determining inclined support bar 8, while guaranteeing that foundation pit 5 be in safety and stability, reduce construction cost with
The construction waste of generation.
In step c, the cutting mode of inner support beam 4 is the cutting of diamond-wire saw cutting machine, comprising the following steps:
S1, segmentation cutting line is divided in inner support beam 4, with drilling machine in segmentation cutting line intersection holes drilled through, for wearing
Connect the saw band of diamond-wire saw cutting machine；
S2, diamond-wire saw cutting machine is placed in inner support beam 4, will be worn on the saw band connected and diamond-wire saw cutting machine
After connector connection, water pipe is opened, water flow size is adjusted, saw band is tightened and cut by controller.It is cut using concrete
The construction method of special equipment diamond-wire saw cutting machine cutting is cut, speed of application is fast, dust pollution is relatively fewer, reduces construction
It noise and reduces environmental pollution.
As shown in Fig. 2, 4 stress of inner support beam of corner is smaller, 4 stress of inner support beam at 5 middle part of foundation pit is larger；Step
In c, inner support beam 4 dismounting sequence is: first tear the inner support beam 4 of 5 corner of foundation pit open, after tear the inner support beam 4 at 5 middle part of foundation pit open,
The installation of plate 7 is supported while removing inner support beam 4；Guarantee that foundation pit 5 is in the state of safety and stability, while in reduction
5 deformation extent of foundation pit in 4 demolishing process of supporting beam.
It when removing the inner support beam 4 of 5 corner of foundation pit, first removes and is located at innermost inner support beam 4, to far from support pile
Successively remove corner's the first supporting beam 9, the second supporting beam 10 and third supporting beam 11 in 2 directions.It is normally in innermost
4 stress of supporting beam is smaller, and 4 stress of inner support beam on the outermost side is maximum.
In step c, when removing the inner support beam 4 with eight words support 12 in the middle part of foundation pit 5, first by the eight of 4 end of inner support beam
Word support 12 is disconnected with purlin 13, then the bar 14 that links between inner support beam 4 is removed, and then inner support beam 4 and purlin 13 are broken
It opens.The release for slowing down stress during removing inner support beam 4 prevents foundation pit 5 from collapsing.
Claims (9)
1. a kind of foundation pit support replacement construction, it is characterized in that: including the following steps
A, backfill (3) are filled between outer wall of basement (1) and support pile (2)；
B, the falsework (6) for being used to support inner support beam (4) is set up below inner support beam (4)；
C, starting remove inner support beam (4) immediately below backfill (3) on pour support plate (7), support plate (7) one end with
It is connect on the outside of support pile (2) connection, the other end and outer wall of basement (1)；Multiple supports are chosen around outer wall of basement (1) side
Point measures the spacing dimension between the outer wall of basement (1) and support pile (2) at supporting point, in the inner support beam that starting is removed
(4) it crosses on and cuts the support beam section that interception corresponds to spacing dimension, support beam section is installed at corresponding supporting point, benefit
The support plate (7) of supporting point is served as with the support beam section cut down, the removal step of remaining inner support beam (4) and starting are removed
Inner support beam (4) removal step it is identical；
D, it after the completion of inner support beam (4) is removed, removes falsework (6).
2. according to foundation pit support replacement construction described in claim 1, it is characterized in that: being distributed immediately below the inner support beam (4)
There is supporting point.
3. according to foundation pit support replacement construction as claimed in claim 2, it is characterized in that: being removed inner support beam (4) in the step c
When, after being first mounted at the supporting point immediately below inner support beam (4) using support plate (7), then to support plate (7) right above
Inner support beam (4) is cut and disassembled.
4. foundation pit support replacement construction according to claim 1, it is characterized in that: inner support beam (4) is torn open in the step c
Except being sequentially: first tear the inner support beam (4) of foundation pit (5) corner open, after tear inner support beam (4) in the middle part of foundation pit (5) open.
5. foundation pit support replacement construction according to claim 1, it is characterized in that: removing and being supportted with eight words in the step c
(12) when inner support beam (4), first the eight words support (12) and purlin (13) of inner support beam (4) end is disconnected, then by inner support
Bar (14) dismounting is linked between beam (4), then disconnects inner support beam (4) and purlin (13).
6. foundation pit support replacement construction according to claim 1, it is characterized in that: in the step c, inner support beam (4)
Cutting mode is the cutting of diamond-wire saw cutting machine, comprising the following steps:
S1, segmentation cutting line is divided on inner support beam (4), with drilling machine in segmentation cutting line intersection holes drilled through, to be used for
Wear the saw band for connecing diamond-wire saw cutting machine；
S2, diamond-wire saw cutting machine is placed on inner support beam (4), will be worn on the saw band connected and diamond-wire saw cutting machine
Connector connection after, open water pipe, adjust water flow size, saw band is tightened and cut by controller.
7. foundation pit support replacement construction according to claim 1, it is characterized in that: inner support beam (4) goes out in the step c
When now the case where upper underbeam overlapping, horizontal bracket is built in inner support beam (4) side of pre-demolition, by the support beam section of well cutting
It is transferred on horizontal bracket, support beam section is lifted to supporting point after being adjusted and is installed.
8. foundation pit support replacement construction according to claim 7 is supported it is characterized in that: being filled using concrete water cement mortar
The gap of plate (7) and outer wall of basement (1) junction.
9. foundation pit support replacement construction according to claim 1, it is characterized in that: installing tiltedly branch on outer wall of basement (1)
Strut (8), inclined support bar (8) upper end and outer wall of basement (1) are fixed, and lower end and basement bottom board (15) are fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711489700.1A CN109989406B (en) | 2017-12-30 | 2017-12-30 | Foundation pit support replacing construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711489700.1A CN109989406B (en) | 2017-12-30 | 2017-12-30 | Foundation pit support replacing construction method |
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| CN109989406A true CN109989406A (en) | 2019-07-09 |
| CN109989406B CN109989406B (en) | 2020-10-20 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110820577A (en) * | 2019-11-14 | 2020-02-21 | 李诺 | Intelligent support system for highway bridge construction in frozen earth section and construction method thereof |
| CN111648248A (en) * | 2020-06-08 | 2020-09-11 | 浙江万里建设工程有限公司 | Method for constructing cliff abutment of rhinestone |
| CN111926859A (en) * | 2020-08-11 | 2020-11-13 | 中建科工集团有限公司 | Basement construction method |
| CN112030983A (en) * | 2020-07-26 | 2020-12-04 | 王建国 | Support replacing system for bottom plate of mucky soil layer foundation pit in deep foundation pit supporting construction |
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| CN102953385A (en) * | 2012-12-07 | 2013-03-06 | 天津住宅集团建设工程总承包有限公司 | Construction method for changing support of foundation pit at irregular place of rampway |
| CN103510523A (en) * | 2013-10-24 | 2014-01-15 | 成军 | Sectional cutting and overall craning method for supporting beam in deep foundation pit multilayered reinforced concrete |
| CN204715366U (en) * | 2015-06-18 | 2015-10-21 | 中建三局第二建设工程有限责任公司 | A kind of large-area deep foundation pit subregion is along the support system under inverse operating mode |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11256588A (en) * | 1998-03-12 | 1999-09-21 | Kajima Corp | Underwater strut constructing method |
| CN102953385A (en) * | 2012-12-07 | 2013-03-06 | 天津住宅集团建设工程总承包有限公司 | Construction method for changing support of foundation pit at irregular place of rampway |
| CN103510523A (en) * | 2013-10-24 | 2014-01-15 | 成军 | Sectional cutting and overall craning method for supporting beam in deep foundation pit multilayered reinforced concrete |
| CN204715366U (en) * | 2015-06-18 | 2015-10-21 | 中建三局第二建设工程有限责任公司 | A kind of large-area deep foundation pit subregion is along the support system under inverse operating mode |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110820577A (en) * | 2019-11-14 | 2020-02-21 | 李诺 | Intelligent support system for highway bridge construction in frozen earth section and construction method thereof |
| CN111648248A (en) * | 2020-06-08 | 2020-09-11 | 浙江万里建设工程有限公司 | Method for constructing cliff abutment of rhinestone |
| CN112030983A (en) * | 2020-07-26 | 2020-12-04 | 王建国 | Support replacing system for bottom plate of mucky soil layer foundation pit in deep foundation pit supporting construction |
| CN112030983B (en) * | 2020-07-26 | 2021-11-16 | 中铁建工集团有限公司 | Support replacing system for bottom plate of mucky soil layer foundation pit in deep foundation pit supporting construction |
| CN111926859A (en) * | 2020-08-11 | 2020-11-13 | 中建科工集团有限公司 | Basement construction method |
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| Publication number | Publication date |
|---|---|
| CN109989406B (en) | 2020-10-20 |
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