CN108442381A - A kind of cylinder open caisson deep foundation pit supporting construction method - Google Patents
A kind of cylinder open caisson deep foundation pit supporting construction method Download PDFInfo
- Publication number
- CN108442381A CN108442381A CN201710084568.XA CN201710084568A CN108442381A CN 108442381 A CN108442381 A CN 108442381A CN 201710084568 A CN201710084568 A CN 201710084568A CN 108442381 A CN108442381 A CN 108442381A
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- CN
- China
- Prior art keywords
- open caisson
- well body
- caisson well
- construction
- foundation pit
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- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D23/00—Caissons; Construction or placing of caissons
- E02D23/08—Lowering or sinking caissons
Abstract
The invention discloses a kind of cylinder open caisson deep foundation pit supporting construction methods, include preparation of construction, line setting, open caisson well body construction making, the observation of open caisson well body sinking construction, base sealing, open caisson well body sinking and correction, building foundation construction, building main body construction process successively；It uses the making of open caisson well body alternately and repeatedly to be carried out with earth excavation, until open caisson well body bottom elevation reaches design requirement, and rectifies a deviation in time to open caisson well body in sinking watching.The construction method speed of application of the present invention is fast, work efficiency is high, saves construction material, is substantially reduced cost.
Description
Technical field
The present invention relates to technical field of building construction more particularly to a kind of cylinder open caisson deep foundation pit supporting construction methods.
Background technology
For many years, due to a large amount of diversion irrigations, each agriculture and animal husbandry group of the Northwest field large area soil is caused, not because of level of ground water
Disconnected to rise, geological conditions constantly deteriorates, and extreme influence is brought to engineering construction.Especially the deep basal pit of some buildings is applied
Work, the liquefaction because of underground saturated water lead to the building or structures that are much located in silty mobile sand band, because foundation pit can not
Supporting and excavation shape and seriously affect the duration.
Invention content
It is an object of the invention in view of the above-mentioned defects in the prior art, provide a kind of cylinder open caisson deep foundation pit supporting construction
Method, speed of application is fast, work efficiency is high, saves construction material, is substantially reduced cost.
To achieve the goals above, the technical scheme is that：
A kind of cylinder open caisson deep foundation pit supporting construction method, made successively including preparation of construction, line setting, the construction of open caisson well body,
The observation and correction, building foundation construction, building that open caisson well body sinking construction, base sealing, open caisson well body are sunk
Main body construction process；
The process that open caisson well body construction makes is：
S1, add pillar structure using the mixing collar tie beam of brick, or be built into using monolithic reinforced concrete structure round, rectangular, polygon
Shape or petal barrel-type open caisson well body；
S11, the construction of cutting shoe collar tie beam, open caisson well body bottom use reinforced concrete cutting shoe collar tie beam, cutting shoe collar tie beam to install to use and dig on the ground
Soil box makes clay model, and inner wall is smoothed out with cement mortar；
S12, open caisson well body masonry, open caisson well body are laid bricks using cement mortar, and constructional column is averagely arranged along open caisson well body perimeter, from
Collar tie beam is arranged in bottom to higher slice；Brick masonary using " 31 " masonry method segmentation builds cast by laying bricks or stones, by open caisson well body wall thickness divide barrel bottom section,
Shell portion and cylinder top section, brick setting is connect with constructional column uses horse tooth trough structure；It often builds certain height i.e. formwork by laying bricks or stones, pours circle
Beam, constructional column concrete；
The open caisson well body sinking construction process is：When the intensity of concrete and masonry mortar reaches 100%, make open caisson well body
Start to sink：
S21, it is gradually dug around since open caisson well centre using hand excavation, mechanical handling method, and remains heavy
The low surrounding in well well shaft bottom center is high；When open caisson well shaft bottom cubic metre of earth moisture content is up to 50% or more, using artificial stirring, mud
Pump pumping excavation method carries out；
S22, sunk using the dead weight of open caisson well body, do not apply external force；
S23, when the lower ring of open caisson well body does not sink vacantly, be symmetrically intubated water filling on the outside of open caisson well, reduce open caisson well
The frictional force of external wall and the soil body, makes open caisson well body sink；
S24, open caisson well body build the preceding paragraph open caisson well body by laying bricks or stones again when sinking down into open caisson well 300 ㎜ suitable for reading away from operating surface；Open caisson well
System work is alternately and repeatedly carried out with earth excavation, until open caisson well body bottom elevation reaches design requirement；
The observation that the open caisson well body is sunk is with process of rectifying a deviation：
S3, when open caisson well body sinks down into projected depth, leveling shaft bottom keep stabilization draws water, meanwhile, sump is done using hacking,
Sump surrounding on the inside of open caisson well body barrel is uniformly distributed, and cobble is thrown since each sump periphery, gobi is padded, takes out simultaneously
Water keeps standing level 500mm below the bed course top surface of gobi, flattens ramming to gobi bed course, does concrete bed course；
The base sealing process is：
S41, before the sinking of open caisson well body, pop up horizontal line and control line in open caisson well outer wall, and symmetrical chiasma is arranged four
Center controls stake；
S42, in open caisson well body sinking watching, observe open caisson well body gradient and cutting shoe collar tie beam tread elevation；
S43, when open caisson well body tilts, pass through shoveling method or jetting method or part increase load method correction.
As the improvement to above-mentioned technical proposal, the process of the line setting is：
S51, it determines axis stake according to design drawing, open caisson line is released with theodolite, steel tape；
S52, open caisson center is controlled into dowel pin except boundary of works area, is not easy the place encountered, often located axial line control stake and at least protect
Card has at two on one wire；
S53, high process control stake is led to construction site nearby be not easy the place encountered, control the absolute altitude of construction overall process.
As the improvement to above-mentioned technical proposal, the soil box surface brush interleaving agent.
As the improvement to above-mentioned technical proposal, the horse tooth trough structure moves back four into it is that quarter brick is long to move back platform for four.
As the improvement to above-mentioned technical proposal, the open caisson well body every one of 500mm high settings it is elongated match rib tape,
Reinforcing bar is φ 6, and per pass is arranged two, and reinforcing bar binding connection, lap of splice 300mm, reinforcing bar end makees 180○Crotch, reinforcing bar are protected
Sheath cannot be less than 30mm.
As the improvement to above-mentioned technical proposal, the construction column template of the collar tie beam is assembled using mirror surface formwork, mirror
The face brush interleaving agent that face die plate is contacted with concrete.
As the improvement to above-mentioned technical proposal, in step 42, when cutting shoe collar tie beam embedded depth not and open caisson height
1/3 when, observe open caisson well body gradient；When caisson cutting edge tread elevation is sunk to away from design altitude about 2m, to tread
Elevation and deflection are observed.
As the improvement to above-mentioned technical proposal, the correction of cutting the earth is the height difference by adjusting shoveling, and adjustment open caisson
The width for retaining earthen platform at cutting shoe, rectifies a deviation.
As the improvement to above-mentioned technical proposal, the jetting correction is using edge outside the open caisson well for the higher side that sinks
Outer wall surrounding injection pressure water makes the soil at this become mud, reduces the drag of soil；The higher side of open caisson is set to sink rapidly；
Stop jetting when correction is close to normal position, and should by between open caisson outer wall and soil gap fine earth or sand fill.
As the improvement to above-mentioned technical proposal, the part increases load correction, i.e., when in open caisson well body sinking watching
When tilting, load can be increased in the higher side of pit shaft（Generally pressurizeed using iron block, sand bag）Or shaken with jarring machine,
Open caisson well body upper side is promoted comparatively fast to sink.
Compared with prior art, the invention has the advantages and positive effects that：
The cylinder open caisson deep foundation pit supporting construction method of the present invention, open caisson well body is prefabricated, open caisson well excavate, supporting, draining and
The processes continuous-stables such as sedimentation securely and reliably fulfil assignment, and greatly reduce earthwork excavated volume and construction land tenure, effectively control underground
Water level, construction site area is small and live clean and tidy, and construction personnel is ensured safely.It is a large amount of to save labour and construction machinery,
Construction cost is significantly lower than traditional handicraft, remarkable benefit.
Specific implementation mode
Below in conjunction with specific embodiments of the present invention, technical scheme of the present invention is clearly and completely described, is shown
So, described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.Based on the reality in the present invention
Example is applied, every other embodiment obtained by those of ordinary skill in the art without making creative efforts is made
Any modification, equivalent substitution, improvement and etc., should all be included in the protection scope of the present invention.
The cylinder open caisson deep foundation pit supporting construction method of the present invention is applied including preparation of construction, line setting, open caisson well body successively
Work making, open caisson well body sinking construction, base sealing, open caisson well body sink observation and correction, building foundation construction,
Building main body construction process；
The process that open caisson well body construction makes is：
S1, add pillar structure using the mixing collar tie beam of brick, or be built into using monolithic reinforced concrete structure round, rectangular, polygon
Shape or petal barrel-type open caisson well body；
S11, the construction of cutting shoe collar tie beam, open caisson well body bottom use reinforced concrete cutting shoe collar tie beam, cutting shoe collar tie beam to install to use and dig on the ground
Soil box makes clay model, and inner wall is smoothed out with cement mortar；
S12, open caisson well body masonry, open caisson well body are laid bricks using cement mortar, and constructional column is averagely arranged along open caisson well body perimeter, from
Collar tie beam is arranged in bottom to higher slice；Brick masonary using " 31 " masonry method segmentation builds cast by laying bricks or stones, by open caisson well body wall thickness divide barrel bottom section,
Shell portion and cylinder top section, brick setting is connect with constructional column uses horse tooth trough structure；It often builds certain height i.e. formwork by laying bricks or stones, pours circle
Beam, constructional column concrete；
The open caisson well body sinking construction process is：When the intensity of concrete and masonry mortar reaches 100%, make open caisson well body
Start to sink：
S21, it is gradually dug around since open caisson well centre using hand excavation, mechanical handling method, and remains heavy
The low surrounding in well well shaft bottom center is high；When open caisson well shaft bottom cubic metre of earth moisture content is up to 50% or more, using artificial stirring, mud
Pump pumping excavation method carries out；
S22, sunk using the dead weight of open caisson well body, do not apply external force；
S23, when the lower ring of open caisson well body does not sink vacantly, be symmetrically intubated water filling on the outside of open caisson well, reduce open caisson well
The frictional force of external wall and the soil body, makes open caisson well body sink；
S24, open caisson well body build the preceding paragraph open caisson well body by laying bricks or stones again when sinking down into open caisson well 300 ㎜ suitable for reading away from operating surface；Open caisson well
System work is alternately and repeatedly carried out with earth excavation, until open caisson well body bottom elevation reaches design requirement；
The observation that the open caisson well body is sunk is with process of rectifying a deviation：
S3, when open caisson well body sinks down into projected depth, leveling shaft bottom keep stabilization draws water, meanwhile, sump is done using hacking,
Sump surrounding on the inside of open caisson well body barrel is uniformly distributed, and cobble is thrown since each sump periphery, gobi is padded, takes out simultaneously
Water keeps standing level 500mm below the bed course top surface of gobi, flattens ramming to gobi bed course, does concrete bed course；
The base sealing process is：
S41, before the sinking of open caisson well body, pop up horizontal line and control line in open caisson well outer wall, and symmetrical chiasma is arranged four
Center controls stake；
S42, in open caisson well body sinking watching, observe open caisson well body gradient and cutting shoe collar tie beam tread elevation；
S43, when open caisson well body tilts, pass through shoveling method or jetting method or part increase load method correction.
As the improvement to above-mentioned technical proposal, the process of the line setting is：
S51, it determines axis stake according to design drawing, open caisson line is released with theodolite, steel tape；
S52, open caisson center is controlled into dowel pin except boundary of works area, is not easy the place encountered, often located axial line control stake and at least protect
Card has at two on one wire；
S53, high process control stake is led to construction site nearby be not easy the place encountered, control the absolute altitude of construction overall process.
As the improvement to above-mentioned technical proposal, the soil box surface brush interleaving agent.
As the improvement to above-mentioned technical proposal, the horse tooth trough structure moves back four into it is that quarter brick is long to move back platform for four.
As the improvement to above-mentioned technical proposal, the open caisson well body every one of 500mm high settings it is elongated match rib tape,
Reinforcing bar is φ 6, and per pass is arranged two, and reinforcing bar binding connection, lap of splice 300mm, reinforcing bar end makees 180○Crotch, reinforcing bar are protected
Sheath cannot be less than 30mm.
As the improvement to above-mentioned technical proposal, the construction column template of the collar tie beam is assembled using mirror surface formwork, mirror
The face brush interleaving agent that face die plate is contacted with concrete.
As the improvement to above-mentioned technical proposal, in step 42, when cutting shoe collar tie beam embedded depth not and open caisson height
1/3 when, observe open caisson well body gradient；When caisson cutting edge tread elevation is sunk to away from design altitude about 2m, to tread
Elevation and deflection are observed.
As the improvement to above-mentioned technical proposal, the correction of cutting the earth is the height difference by adjusting shoveling, and adjustment open caisson
The width for retaining earthen platform at cutting shoe, rectifies a deviation.
As the improvement to above-mentioned technical proposal, the jetting correction is using edge outside the open caisson well for the higher side that sinks
Outer wall surrounding injection pressure water makes the soil at this become mud, reduces the drag of soil；The higher side of open caisson is set to sink rapidly；
Stop jetting when correction is close to normal position, and should by between open caisson outer wall and soil gap fine earth or sand fill.
As the improvement to above-mentioned technical proposal, the part increases load correction, i.e., when in open caisson well body sinking watching
When tilting, load can be increased in the higher side of pit shaft（Generally pressurizeed using iron block, sand bag）Or shaken with jarring machine,
Open caisson well body upper side is promoted comparatively fast to sink.
Compared with prior art, the invention has the advantages and positive effects that：
The cylinder open caisson deep foundation pit supporting construction method of the present invention, open caisson well body is prefabricated, open caisson well excavate, supporting, draining and
The processes continuous-stables such as sedimentation securely and reliably fulfil assignment, and greatly reduce earthwork excavated volume and construction land tenure, effectively control underground
Water level, construction site area is small and live clean and tidy, and construction personnel is ensured safely.It is a large amount of to save labour and construction machinery,
Construction cost is significantly lower than traditional handicraft, remarkable benefit.
The basic principles, main features and advantages of the present invention have been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the above embodiments and description only describe this
The principle of invention, various changes and improvements may be made to the invention without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and its
Equivalent defines.
Claims (10)
1. a kind of cylinder open caisson deep foundation pit supporting construction method, it is characterised in that：Include preparation of construction, line setting, open caisson successively
The observation and correction, building base that well body construction making, open caisson well body sinking construction, base sealing, open caisson well body are sunk
Plinth construction, building main body construction process；
The process that open caisson well body construction makes is：
S1, add pillar structure using the mixing collar tie beam of brick, or be built into using monolithic reinforced concrete structure round, rectangular, polygon
Shape or petal barrel-type open caisson well body；
S11, the construction of cutting shoe collar tie beam, open caisson well body bottom use reinforced concrete cutting shoe collar tie beam, cutting shoe collar tie beam to install to use and dig on the ground
Soil box makes clay model, and inner wall is smoothed out with cement mortar；
S12, open caisson well body masonry, open caisson well body are laid bricks using cement mortar, and constructional column is averagely arranged along open caisson well body perimeter, from
Collar tie beam is arranged in bottom to higher slice；Brick masonary using " 31 " masonry method segmentation builds cast by laying bricks or stones, by open caisson well body wall thickness divide barrel bottom section,
Shell portion and cylinder top section, brick setting is connect with constructional column uses horse tooth trough structure；It often builds certain height i.e. formwork by laying bricks or stones, pours circle
Beam, constructional column concrete；
The open caisson well body sinking construction process is：When the intensity of concrete and masonry mortar reaches 100%, make open caisson well body
Start to sink：
S21, it is gradually dug around since open caisson well centre using hand excavation, mechanical handling method, and remains heavy
The low surrounding in well well shaft bottom center is high；When open caisson well shaft bottom cubic metre of earth moisture content is up to 50% or more, using artificial stirring, mud
Pump pumping excavation method carries out；
S22, sunk using the dead weight of open caisson well body, do not apply external force；
S23, when the lower ring of open caisson well body does not sink vacantly, be symmetrically intubated water filling on the outside of open caisson well, reduce open caisson well
The frictional force of external wall and the soil body, makes open caisson well body sink；
S24, open caisson well body build the preceding paragraph open caisson well body by laying bricks or stones again when sinking down into open caisson well 300 ㎜ suitable for reading away from operating surface；Open caisson well
System work is alternately and repeatedly carried out with earth excavation, until open caisson well body bottom elevation reaches design requirement；
The observation that the open caisson well body is sunk is with process of rectifying a deviation：
S3, when open caisson well body sinks down into projected depth, leveling shaft bottom keep stabilization draws water, meanwhile, sump is done using hacking,
Sump surrounding on the inside of open caisson well body barrel is uniformly distributed, and cobble is thrown since each sump periphery, gobi is padded, takes out simultaneously
Water keeps standing level 500mm below the bed course top surface of gobi, flattens ramming to gobi bed course, does concrete bed course；
The base sealing process is：
S41, before the sinking of open caisson well body, pop up horizontal line and control line in open caisson well outer wall, and symmetrical chiasma is arranged four
Center controls stake；
S42, in open caisson well body sinking watching, observe open caisson well body gradient and cutting shoe collar tie beam tread elevation；
S43, when open caisson well body tilts, pass through shoveling method or jetting method or part increase load method correction.
2. cylinder open caisson deep foundation pit supporting construction method according to claim 1, it is characterised in that：The work of the line setting
Sequence is：
S51, it determines axis stake according to design drawing, open caisson line is released with theodolite, steel tape；
S52, open caisson center is controlled into dowel pin except boundary of works area, is not easy the place encountered, often located axial line control stake and at least protect
Card has at two on one wire；
S53, high process control stake is led to construction site nearby be not easy the place encountered, control the absolute altitude of construction overall process.
3. cylinder open caisson deep foundation pit supporting construction method according to claim 1, it is characterised in that：Soil box surface brush every
From agent.
4. cylinder open caisson deep foundation pit supporting construction method according to claim 1, it is characterised in that：The horse tooth trough structure is
Four move back four into it is that quarter brick is long to move back platform.
5. cylinder open caisson deep foundation pit supporting construction method according to claim 1, it is characterised in that：The open caisson well body every
One of 500mm high settings it is elongated match rib tape, reinforcing bar is φ 6, and per pass is arranged two, reinforcing bar binding connection, and the lap of splice is
300mm, reinforcing bar end make 180○Crotch, cover to reinforcement cannot be less than 30mm.
6. cylinder open caisson deep foundation pit supporting construction method according to claim 1, it is characterised in that：The constructional column of the collar tie beam
Template is assembled using mirror surface formwork, the face brush interleaving agent that mirror surface formwork is contacted with concrete.
7. cylinder open caisson deep foundation pit supporting construction method according to claim 1, it is characterised in that：In step 42, work as sword
The embedded depth of foot collar tie beam not and open caisson height 1/3 when, observe open caisson well body gradient；When under caisson cutting edge tread elevation
When sinking to away from design altitude about 2m, tread elevation and deflection are observed.
8. cylinder open caisson deep foundation pit supporting construction method according to claim 1, it is characterised in that：The shoveling correction is logical
The width for retaining earthen platform at the height difference that adjustment is cut the earth, and adjustment caisson cutting edge is crossed, is rectified a deviation.
9. cylinder open caisson deep foundation pit supporting construction method according to claim 1, it is characterised in that：The jetting correction uses
Along outer wall surrounding injection pressure water outside the open caisson well of the higher side of sinking, the soil at this is made to become mud, reduces the anti-of soil
Power；The higher side of open caisson is set to sink rapidly；Stop jetting when correction is close to normal position, and should be by open caisson outer wall and soil
Between gap fine earth or sand filling.
10. cylinder open caisson deep foundation pit supporting construction method according to claim 1, it is characterised in that：The part increases lotus
Correction is carried, i.e., when being tilted in open caisson well body sinking watching, load can be increased in the higher side of pit shaft or use jarring machine
Vibrations, promote open caisson well body upper side comparatively fast to sink.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710084568.XA CN108442381A (en) | 2017-02-16 | 2017-02-16 | A kind of cylinder open caisson deep foundation pit supporting construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710084568.XA CN108442381A (en) | 2017-02-16 | 2017-02-16 | A kind of cylinder open caisson deep foundation pit supporting construction method |
Publications (1)
| Publication Number | Publication Date |
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| CN108442381A true CN108442381A (en) | 2018-08-24 |
Family
ID=63190757
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| CN201710084568.XA Pending CN108442381A (en) | 2017-02-16 | 2017-02-16 | A kind of cylinder open caisson deep foundation pit supporting construction method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344423A (en) * | 2019-07-12 | 2019-10-18 | 江苏南通二建集团有限公司 | A kind of drop shaft sinking forms the construction method of water level for local deep foundation pit under high water level |
| CN112554203A (en) * | 2020-12-03 | 2021-03-26 | 九冶建设有限公司 | Miniature open caisson prefabricated molding bed construction method for silt flow sand area with abundant underground water |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7921573B1 (en) * | 2009-03-23 | 2011-04-12 | Ric-Man Construction, Inc. | Monitoring verticality of a sinking caisson |
| CN102454167A (en) * | 2010-10-21 | 2012-05-16 | 五冶集团上海有限公司 | Construction method for large ultra-deep well |
| CN106088127A (en) * | 2016-07-02 | 2016-11-09 | 天鸿建设集团有限公司 | Open caisson construction method |
-
2017
- 2017-02-16 CN CN201710084568.XA patent/CN108442381A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7921573B1 (en) * | 2009-03-23 | 2011-04-12 | Ric-Man Construction, Inc. | Monitoring verticality of a sinking caisson |
| CN102454167A (en) * | 2010-10-21 | 2012-05-16 | 五冶集团上海有限公司 | Construction method for large ultra-deep well |
| CN106088127A (en) * | 2016-07-02 | 2016-11-09 | 天鸿建设集团有限公司 | Open caisson construction method |
Non-Patent Citations (1)
| Title |
|---|
| 景小军: "筒体式沉井深基坑支护施工技术", 《城市建设理论研究（电子版）》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110344423A (en) * | 2019-07-12 | 2019-10-18 | 江苏南通二建集团有限公司 | A kind of drop shaft sinking forms the construction method of water level for local deep foundation pit under high water level |
| CN112554203A (en) * | 2020-12-03 | 2021-03-26 | 九冶建设有限公司 | Miniature open caisson prefabricated molding bed construction method for silt flow sand area with abundant underground water |
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Application publication date: 20180824 |