CN106545026A - Open caisson subregion based on remaining core soil in advance excavates method for sinking - Google Patents
Open caisson subregion based on remaining core soil in advance excavates method for sinking Download PDFInfo
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- CN106545026A CN106545026A CN201610956961.9A CN201610956961A CN106545026A CN 106545026 A CN106545026 A CN 106545026A CN 201610956961 A CN201610956961 A CN 201610956961A CN 106545026 A CN106545026 A CN 106545026A
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- open caisson
- sinking
- nucleus
- subregion
- multiple subregions
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- 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
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of open caisson subregion based on remaining core soil in advance excavates method for sinking, comprise the following steps：Step one, treat that open caisson connects height first after the completion of, according to the separation quantity positioned at nucleus for precalculating and reserve, so that it is determined that the position of multiple subregions to be excavated and the nucleus at center；Step 2, soil layer is excavated respectively below multiple subregions, until open caisson integral sinking；Step 3, when well sinking is to preassigned position, connect height on the basis of former open caisson again, determine the position of multiple subregions to be excavated again；Repeat step two and three, until well sinking is to target location.The method inventive method optimizes well sinking stage structures stress, solves the problems, such as that open caisson tradition open caisson drawing crack easily occurs in excavating method for sinking.
Description
Technical field
The present invention relates to open caisson excavates sinking field, more particularly under a kind of open caisson subregion based on remaining core soil in advance is excavated
Heavy method.
Background technology
The sixties in 20th century has developed well foundation in Nanjing Yangtze River Bridge construction；Subsequently in Jiangyin Yangtse River suspension bridge north anchor
Heavy stone used as an anchor (open caisson planar dimension 69m × 51m, high 56m)；Four bridge north anchorage of yangtze river in nanjing (open caisson planar dimension 69m × 58m, it is high
52.8m)；Parrot continent Yangtze Bridge north anchorage (the new open caisson external diameter 66m in circular hole ring section, high 43m)；Ma'an Mountain's Yangtze Bridge
It is applied in north anchorage (open caisson size is 60.2m × 55.4m, high 41m) etc. multiple sciences of bridge building.Open caisson construction is through more
Year development, but during sinking construction, when especially engineering is with complicated hydrogeological conditions, still there is sinking and stop in well sinking
Stagnant, prominent heavy, structure destruction equivalent risk.A kind of open caisson excavation method how is designed, open caisson is put down under conditions of meeting structure safety
It is steady to sink there is very high using value.
The content of the invention
It is an object of the invention to solve at least the above, and provide the advantage that at least will be described later.
It is a still further object of the present invention to provide a kind of open caisson subregion based on remaining core soil in advance excavates method for sinking, including
Following steps：
Step one, treat that open caisson connects height first after the completion of, multiple regions will be divided into positioned at the soil layer of open caisson bottom：In being located at
The nucleus of the heart and the multiple subregions around which；According to the separation positioned at nucleus for precalculating and reserve
Quantity, so that it is determined that the position of multiple subregions to be excavated and the nucleus at center；
Step 2, an excavation area according to needed for the corresponding open caisson of precalculated multiple subregions declines and core space
A reserved Area of bearing of domain, excavates soil layer below multiple subregions respectively, until open caisson integral sinking；
Step 3, when well sinking is to preassigned position, connect height on the basis of former open caisson again, again calculate it is many
The reserved secondary Area of bearing of secondary excavation area and nucleus needed for the corresponding well sinking of individual subregion, and determine and wait out
The position of the multiple subregions for digging；
Repeat step two and three, until well sinking is to target location.
Preferably, the described open caisson subregion based on remaining core soil in advance excavates method for sinking, in step 2, at multiple points
Soil layer is excavated in area, until open caisson integral sinking, specially：
Soil layer is excavated below multiple subregions, if the corresponding open caisson of the subregion can not sink, open caisson outer wall position is excavated
Locate for half cutting shoe holding state, if open caisson can not still sink, ensureing to be gradually reduced on the basis of structural strength meets demand
The area of reserved nucleus is until well sinking.
Preferably, the described open caisson subregion based on remaining core soil in advance excavates method for sinking, in step 2, at multiple points
Soil layer is excavated below area, need to be guaranteed：Soil layer below two neighboring subregion, and the division wall of subregion and nucleus is not opened
Dig.
Preferably, the described open caisson subregion based on remaining core soil in advance excavates method for sinking, and the plurality of subregion is concrete
For 4.
Preferably, the described open caisson subregion based on remaining core soil in advance excavates method for sinking, in step 2 and step 3,
High weight and open caisson and formation-engaging surfaces product are connect according to ultimate bearing capacity of foundation soil, open caisson, by subsidence factor computing formula, is calculated
The reserved Area of bearing of the excavation area gone out needed for the corresponding well sinking of multiple subregions and nucleus.
The present invention at least includes following beneficial effect：1st, the inventive method optimizes well sinking stage structures stress, solution
Determine and the problem of open caisson drawing crack during open caisson tradition excavates method for sinking, easily occurred；2nd, the inventive method is divided into 4 big points open caisson
Area, operates when each subregion open caisson is excavated and is easily achieved；3rd, the inventive method is for solution open caisson excavation can not sink and dash forward
Heavy prevention etc. has larger benefit.
Part is embodied by the further advantage of the present invention, target and feature by description below, and part will also be by originally
The research of invention and practice and be understood by the person skilled in the art.
Description of the drawings
Fig. 1 is the subregion schematic diagram of the open caisson bottom solum of the present invention.
Specific embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings, to make those skilled in the art with reference to specification text
Word can be implemented according to this.
It should be appreciated that it is used herein such as " have ", "comprising" and " including " term do not allot one or many
The presence or addition of individual other elements or its combination.
As shown in figure 1, the present invention provides a kind of open caisson subregion based on remaining core soil in advance excavates method for sinking, including it is following
Step：
Step one, treat that open caisson connects height first after the completion of, multiple regions will be divided into positioned at the soil layer of open caisson bottom：In being located at
The nucleus 1 of the heart and the multiple subregions 2 around which；
In two neighboring subregion, and at the boundary between subregion and nucleus, build partition wall, and respectively subregion with
And partition wall inside nucleus, is built, so as to open caisson is divided into multiple separations；
According to the separation quantity positioned at nucleus 1 for precalculating and reserve, so that it is determined that to be excavated multiple points
The nucleus of the position and center in area 2；
Step 2, an excavation area according to needed for 2 corresponding open caisson of precalculated multiple subregions declines and core
A reserved Area of bearing of region 1, excavates soil layer below multiple subregions 2 respectively, so that the soil body suffered by open caisson is supported
Effect reduces, and core space and open caisson outer wall partition wall cut soil layer, open caisson integral sinking；
Step 3, when well sinking is to preassigned position, connect height on the basis of former open caisson again, again calculate it is many
The reserved secondary Area of bearing of secondary excavation area and nucleus 1 needed for 2 corresponding well sinking of individual subregion, and determine and treat
The position of the multiple subregions 2 for excavating；
Repeat step two and three, until well sinking is to target location.
The described open caisson subregion based on remaining core soil in advance excavates method for sinking, in step 2, in multiple subregion spoils
Layer, until open caisson integral sinking, specially：
Soil layer is excavated below multiple subregions, if the corresponding open caisson of the subregion can not sink, open caisson outer wall position is excavated
Locate for half cutting shoe holding state, if open caisson can not still sink, ensureing to be gradually reduced on the basis of structural strength meets demand
The area of reserved nucleus is until well sinking.
The described open caisson subregion based on remaining core soil in advance excavates method for sinking, in step 2, opens below multiple subregions
Shoveling layer, need to guarantee：Soil layer below two neighboring subregion, and the division wall 3 of subregion and nucleus is not excavated.
The described open caisson subregion based on remaining core soil in advance excavates method for sinking, and the plurality of subregion is specially 4.
The method is received in structure by large-scale well-sinking being divided into four big subregions of nucleus and surrounding positioned at center
It is equal in power in terms of open caisson is divided into four " small-sized open caissons ", structure stress and more optimizes；Even if local base ultimate bearing
When power is larger, it is also possible to first excavate from four larger subregions of Area of bearing, if open caisson does not sink after four subregions are excavated, can be by
Gradually excavating remaining core soil in advance cabin number makes open caisson start to sink, and progressively spreads from center to surrounding according to tradition so as to avoid open caisson
When excavation method is excavated, open caisson is easy to the situation of drawing crack.The inventive method is for geometry gesture stability during well sinking, heavy
Well construction stress optimization, operation simplify, and for open caisson can not sink and dash forward sink prevention also have larger benefit.
In practice of construction operation, (1) surveys data with consulting region first, determines ultimate bearing capacity of foundation soil and side frictional resistance
Force value；(2) height, sinking combination construction scheme are connect according to open caisson, calculates open caisson and connect high weight first；(3) according to well sinking system
Number computing formula, determines excavation area, counter to push away remaining Area of bearing；(4) determine open caisson partition wall remaining core soil in advance area and reserve
Position, division open caisson are nucleus and four big subregions,；(5) excavation in zones soil layer, well sinking, if can not sink, are progressively opened
Dig outer wall to support to sinking for half cutting shoe；(6), in sinking watching, it is ensured that Core Soil supports to obtain validity, Core Soil is suitably excavated,
Reduce Core Soil and the subregion soil layer discrepancy in elevation；(7) open caisson sinks down into specified absolute altitude, the follow-up heightening and sinking of open caisson first；(8) count again
Calculate remaining Area of bearing and determine four big district location of open caisson；(9) method for sinking is excavated first according to open caisson, make to connect high back open caisson
Sink down into specified absolute altitude.
Although embodiment of the present invention is disclosed as above, which is not restricted to listed by specification and embodiment
With, it can be applied to various suitable the field of the invention completely, for those skilled in the art, can be easily
Other modification is realized, therefore under the universal limited without departing substantially from claim and equivalency range, the present invention is not limited
In specific details and shown here as the legend with description.
Claims (5)
1. a kind of open caisson subregion based on remaining core soil in advance excavates method for sinking, it is characterised in that comprise the following steps：
Step one, treat that open caisson connects height first after the completion of, multiple regions will be divided into positioned at the soil layer of open caisson bottom：Positioned at center
Nucleus and the multiple subregions around which；According to the separation number positioned at nucleus for precalculating and reserve
Amount, so that it is determined that the position of multiple subregions to be excavated and the nucleus at center；
Step 2, an excavation area according to needed for the corresponding open caisson of precalculated multiple subregions declines and nucleus are pre-
The Area of bearing for staying, excavates soil layer below multiple subregions respectively, until open caisson integral sinking；
Step 3, when well sinking is to preassigned position, connect height on the basis of former open caisson again, calculate multiple points again
The secondary Area of bearing that secondary excavation area and nucleus needed for the corresponding well sinking in area is reserved, and determine to be excavated
The position of multiple subregions；
Repeat step two and three, until well sinking is to target location.
2. the open caisson subregion based on remaining core soil in advance as claimed in claim 1 excavates method for sinking, it is characterised in that step 2
In, soil layer is excavated in multiple subregions, until open caisson integral sinking, specially：
Soil layer is excavated below multiple subregions, if the corresponding open caisson of the subregion can not sink, at excavation open caisson outer wall position is
Half cutting shoe holding state, it is if open caisson can not still sink, reserved ensureing to be gradually reduced on the basis of structural strength meets demand
Nucleus area until well sinking.
3. the open caisson subregion based on remaining core soil in advance as claimed in claim 1 excavates method for sinking, it is characterised in that step 2
In, soil layer is excavated below multiple subregions, need to guarantee：Below two neighboring subregion, and the division wall of subregion and nucleus
Soil layer do not excavate.
4. the open caisson subregion based on remaining core soil in advance as claimed in claim 1 excavates method for sinking, it is characterised in that described many
Individual subregion is specially 4.
5. the open caisson subregion based on remaining core soil in advance as claimed in claim 1 excavates method for sinking, it is characterised in that step 2
In step 3, high weight and open caisson and formation-engaging surfaces product are connect according to ultimate bearing capacity of foundation soil, open caisson, by subsidence factor meter
Formula is calculated, the Area of bearing that excavation area and nucleus needed for the corresponding well sinking of multiple subregions are reserved is calculated.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610956961.9A CN106545026A (en) | 2016-10-27 | 2016-10-27 | Open caisson subregion based on remaining core soil in advance excavates method for sinking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610956961.9A CN106545026A (en) | 2016-10-27 | 2016-10-27 | Open caisson subregion based on remaining core soil in advance excavates method for sinking |
Publications (1)
| Publication Number | Publication Date |
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| CN106545026A true CN106545026A (en) | 2017-03-29 |
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| CN201610956961.9A Pending CN106545026A (en) | 2016-10-27 | 2016-10-27 | Open caisson subregion based on remaining core soil in advance excavates method for sinking |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110528551A (en) * | 2019-08-08 | 2019-12-03 | 中交第二航务工程局有限公司 | The W-shaped excavation sinking construction method of open caisson |
Citations (5)
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|---|---|---|---|---|
| JPH07216904A (en) * | 1994-02-07 | 1995-08-15 | Yamaha Kako Kensetsu Kk | Pneumatic caisson |
| KR100651671B1 (en) * | 2005-12-20 | 2006-12-01 | 주식회사 동경 | Construction method using caisson |
| CN101294394A (en) * | 2008-05-28 | 2008-10-29 | 中交公路规划设计院有限公司 | Steel cavity stranded caisson-pile inverse-way composite base and construction method |
| CN102409693A (en) * | 2011-08-11 | 2012-04-11 | 中交二航局第四工程有限公司 | Partitioned bottom sealing method for large volume sunk well foundation |
| CN102505702A (en) * | 2011-10-13 | 2012-06-20 | 中国化学工程第十三建设有限公司 | Double-wall concrete open caisson and construction method thereof |
-
2016
- 2016-10-27 CN CN201610956961.9A patent/CN106545026A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07216904A (en) * | 1994-02-07 | 1995-08-15 | Yamaha Kako Kensetsu Kk | Pneumatic caisson |
| KR100651671B1 (en) * | 2005-12-20 | 2006-12-01 | 주식회사 동경 | Construction method using caisson |
| CN101294394A (en) * | 2008-05-28 | 2008-10-29 | 中交公路规划设计院有限公司 | Steel cavity stranded caisson-pile inverse-way composite base and construction method |
| CN102409693A (en) * | 2011-08-11 | 2012-04-11 | 中交二航局第四工程有限公司 | Partitioned bottom sealing method for large volume sunk well foundation |
| CN102505702A (en) * | 2011-10-13 | 2012-06-20 | 中国化学工程第十三建设有限公司 | Double-wall concrete open caisson and construction method thereof |
Non-Patent Citations (1)
| Title |
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| 穆保岗等: "土体支承刚度对下沉期沉井内力的影响分析", 《东南大学学报》 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110528551A (en) * | 2019-08-08 | 2019-12-03 | 中交第二航务工程局有限公司 | The W-shaped excavation sinking construction method of open caisson |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20171205 Address after: 430048 Wuhan, East Lake District, Hubei Jin Lake Road, No. 11 Applicant after: China Communications 2nd Navigational Bureau Applicant after: ZHONGJIAO WUHAN ZHIXING INTERNATIONAL ENGINEERING CONSULTING CO., LTD. Applicant after: CCCC SHEC Fourth Engineering Co., Ltd. Address before: 430048 Wuhan, East Lake District, Hubei Jin Lake Road, No. 11 Applicant before: China Communications 2nd Navigational Bureau Applicant before: ZHONGJIAO WUHAN ZHIXING INTERNATIONAL ENGINEERING CONSULTING CO., LTD. |
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Application publication date: 20170329 |
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| RJ01 | Rejection of invention patent application after publication |