CN106812146A - A kind of construction method of steel sheet-pile cofferdam concrete sealing bottom - Google Patents
A kind of construction method of steel sheet-pile cofferdam concrete sealing bottom Download PDFInfo
- Publication number
- CN106812146A CN106812146A CN201710147175.9A CN201710147175A CN106812146A CN 106812146 A CN106812146 A CN 106812146A CN 201710147175 A CN201710147175 A CN 201710147175A CN 106812146 A CN106812146 A CN 106812146A
- Authority
- CN
- China
- Prior art keywords
- concrete
- construction method
- back cover
- substrate
- absolute altitude
- 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.)
- Pending
Links
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses a kind of construction method of steel sheet-pile cofferdam concrete sealing bottom, including（1）Substrate is constructed：Subregion is carried out according to steel sheet-pile cofferdam area, and each region is excavated respectively and absolute altitude detection, stopped after meeting design substrate absolute altitude, form substrate；（2）Cushion construction：Blotter is laid in the substrate；（3）Back cover is constructed：Back cover conduit is respectively arranged according to subregion, and concreting is carried out by back cover conduit, while carrying out absolute altitude detection, stopped after meeting design back cover absolute altitude；The construction method is by increasing cushion construction and adjustment pouring order of concrete, it is to avoid silt is mingled with concrete, so as to improve the intensity of bottom concrete, it is ensured that construction quality.
Description
Technical field
The present invention relates to Bridge Construction technical field, more particularly to a kind of construction of steel sheet-pile cofferdam concrete sealing bottom
Method.
Background technology
At present, due to fast with speed, workload is small, low cost, adapts to for the construction method of steel sheet-pile cofferdam back cover under water
The strong advantage of property and be widely used in science of bridge building technology, be that the rapid construction and construction of road and bridge bring many benefits
Place.However, being found in work progress, the construction method of steel sheet-pile cofferdam back cover under water there is also some problems and risk, especially
It is when carrying out application and construction in sandy riverbed or river, may to cause to be easy to be mingled with silt during filling concrete, is caused
The hidden danger of quality and engineering accident of bottom concrete.
Therefore, it is to avoid steel sheet-pile cofferdam sedimentation or to be mixed in concrete inside and outside and influence in back cover work progress under water
Bottom concrete construction quality, is to improve science of bridge building quality problem in urgent need to solve.
The content of the invention
It is an object of the invention to overcome the above-mentioned deficiency in the presence of prior art, there is provided a kind of steel sheet-pile cofferdam coagulation
The construction method at grave bottom；The construction method pours order by increasing cushion construction and changing mixed mud, makes the silt of river bed
Will not be mixed in mixed mud, the quick sand in water is not deposited on concrete, so as to improve concrete strength, it is ensured that work
Cheng Zhiliang.
In order to realize foregoing invention purpose, the invention provides a kind of construction method of steel sheet-pile cofferdam concrete sealing bottom,
Comprise the following steps：
（1）Substrate is constructed：Subregion is carried out according to steel sheet-pile cofferdam area, and each region is excavated respectively and absolute altitude inspection
Survey, stop after meeting design substrate absolute altitude, form substrate；
（2）Cushion construction：Blotter is laid in the substrate；
（3）Back cover is constructed：Back cover conduit is respectively arranged according to subregion, and concreting is carried out by back cover conduit, while entering
Rower high detection, stops after meeting design back cover absolute altitude.
In a kind of construction method of above-mentioned steel sheet-pile cofferdam concrete sealing bottom, the subregion in step 1 to cofferdam is pressed per area
Area is 10-30m2Divided；It is divided into smaller area and is excavated and detected absolute altitude, can be prevented effectively from due in digging process
The back cover thickness that the funnel-form that is likely to result in and measurement density are not enough caused do not reach the requirement of design thickness, hidden danger of quality,
The problems such as security incident.
Wherein, it is preferred that described digging mode include mud pumping mud, digging machine excavate in one or two；Excavate
Mode carries out Reasonable adjustment and selection according to construction environment and requirement, can effectively improve efficiency of construction and construction quality, it is ensured that base
Bottom meets design requirement.
Wherein, it is preferred that described absolute altitude detection includes the one or two more than water surface in measurement, submarine inspection；Inspection
Survey mode carries out Reasonable adjustment and selection according to construction environment and requirement, can effectively improve efficiency of construction and construction quality, it is ensured that
Substrate reaches design thickness requirement.
In a kind of construction method of above-mentioned steel sheet-pile cofferdam concrete sealing bottom, the blotter thickness control described in step 2
In 10-50cm, bed course can be effectively isolated the free sand of substrate, contact of the soil with concrete to system, prevent bottom concrete to be mingled with silt,
So as to influence bottom concrete intensity；Preferably, the preferred slabstone of described blotter, slabstone can prevent drift sand to be deposited on rubble
Surface with concrete so as to be mingled with.
In a kind of construction method of above-mentioned steel sheet-pile cofferdam concrete sealing bottom, back cover conduit laying time control guidance in step 3
The mouth of pipe is 10cm~15cm apart from substrate level.
Wherein, the pouring order of concrete is：Poured since the region at cofferdam edge, gradually to cofferdam central area
Advanced, finally terminate to pour with cofferdam central area；Pouring order using this can push away the debris such as the free silt of substrate
The region that edge concrete has been the beginning of coagulation is moved to, reduction silt is mingled with concrete, so that it is guaranteed that the quality of bottom concrete.
Wherein, it is preferred that in the concreting process, in addition to first pours a little, subsequent sections pour a position and need elder generation
Insert the catheter into concrete, and the perfusion of concrete can be just carried out after draining conduit internal water accumulation with water pump；Can be had using the method
Effect solves concrete and returns water problems, improves the intensity of bottom concrete.
Wherein, it is preferred that the method that can be simultaneously poured using multiple spot in the concreting process is poured, and can be increased
Plus speed of perfusion, it is to avoid there is construction joint in concrete, improves the construction quality of bottom concrete and speeds up the work.
Wherein, it is preferred that the concrete is that the slump is the concrete of 180mm-240mm；Feud can be effectively controlled to mix
The flatness on solidifying soil surface, improves back cover quality；Most preferably, the concrete is that the slump is the coagulation of 200mm-220mm
Soil.
A kind of construction method of steel sheet-pile cofferdam concrete sealing bottom, first passes through laying bed course, is acted on using the cut-off of bed course,
Avoid concrete from being contacted with the silt of substrate, so as to avoid silt from being mixed in concrete, improve the intensity of bottom concrete；
Again by adjusting the pouring order of concrete of different zones in cofferdam, the debris such as free silt are made to elapse to edge concrete
The region of initial set, so that being mingled with for silt and concrete is reduced, to ensure the quality of bottom concrete；The construction method can not only
Improve the intensity of bottom concrete, it is ensured that construction quality, moreover it is possible to speed up the work, and simply, reliably, it is adaptable to various waters
Road and bridge back cover construction.
Compared with prior art, beneficial effects of the present invention：
1st, construction method of the present invention pours order by increasing cushion construction and adjustment mixed mud, it is to avoid silt and concrete
It is mingled with, so as to improve the intensity of bottom concrete, it is ensured that construction quality.
2nd, construction method of the present invention can using multiple spot simultaneously excavate substrate and concreting, so as to accelerate construct into
Degree, reduces the construction period.
3rd, construction method of the present invention is simple, reliable, it is adaptable to the road and bridge back cover construction in various waters.
Brief description of the drawings：
Fig. 1 is the subregion of the embodiment of the present invention 1 and excavates point position division schematic diagram；
Fig. 2 is that the back cover conduit of the embodiment of the present invention 1 is laid and filling concrete point distribution schematic diagram；
Fig. 3 is the pouring order of concrete schematic diagram of the embodiment of the present invention 1；
Reference：1- steel sheet-pile cofferdams, 2- bracing members, 3- back cover conduits, 4- perfusion points, 5- cofferdam subregion.
Specific embodiment
With reference to test example and specific embodiment, the present invention is described in further detail.But this should not be understood
For the scope of above-mentioned theme of the invention is only limitted to following embodiment, all technologies realized based on present invention belong to this
The scope of invention.
Embodiment 1
The construction method of certain Huanghe River Highway Bridge 115# pier concrete sealing bottoms：
（1）Substrate is constructed：4.8*5.28m points is substantially pressed for 20 areas according to steel sheet-pile cofferdam area（As shown in Figure 1）, excavate point
Position is arranged on each regional center (RC) position, based on mud pumping mud, each region is entered supplemented by long-armed digging machine underwater excavation
Row foundation ditch underwater excavation, and use more than the water surface based on measurement, the method for being aided with submarine inspection carries out absolute altitude detection, meets design
Stop after substrate absolute altitude, form substrate；
（2）Cushion construction：Laying depth is about the blotter of 20cm in the substrate；
（3）Back cover is constructed：Back cover conduit is respectively arranged according to subregion（As shown in Figure 2）, poured using two groups of symmetrical concrete of conduit
Construction is built, is elapsed to long side direction using after short side direction casting complete, when pouring three rows, pour point moves to the 5th and discharges into
Row cast（Order is poured as shown in figure 3, A, B represent two groups while carrying out pouring construction, digitized representation pours order）, while entering
Rower high detection, stops after meeting design back cover absolute altitude.
Embodiment 2
The construction method of certain Huanghe River Highway Bridge 109# pier concrete sealing bottoms：
（1）Substrate is constructed：4.8*5.28m points is substantially pressed for 20 areas according to steel sheet-pile cofferdam area, excavates site setting every
Individual regional center (RC) position, based on mud pumping mud, foundation ditch is carried out under water supplemented by long-armed digging machine underwater excavation to each region
Excavate, and use more than the water surface based on measurement, the method for being aided with submarine inspection carries out absolute altitude detection, after meeting design substrate absolute altitude
Stop, forming substrate；
（2）Cushion construction：Laying depth is about the blotter of 15cm in the substrate；
（3）Back cover is constructed：Back cover conduit is respectively arranged according to subregion, using single group tremie concrete pouring construction, using short side
Elapsed to long side direction after the casting complete of direction, when pouring three rows, pour point moves to the 5th and discharges into capable cast, while carrying out
Absolute altitude is detected, stopped after meeting design back cover absolute altitude.
Comparative example 1
The construction method of certain Huanghe River Highway Bridge 114# pier concrete sealing bottoms：
（1）Substrate is constructed：4.8*5.28m points is substantially pressed for 20 areas according to steel sheet-pile cofferdam area, excavates site setting every
Individual regional center (RC) position, based on mud pumping mud, foundation ditch is carried out under water supplemented by long-armed digging machine underwater excavation to each region
Excavate, and use more than the water surface based on measurement, the method for being aided with submarine inspection carries out absolute altitude detection, after meeting design substrate absolute altitude
Stop, forming substrate；
（2）Cushion construction：Laying depth is about the blotter of 20cm in the substrate；
（3）Back cover is constructed：Back cover conduit is respectively arranged according to subregion, using two groups of symmetrical concrete pouring constructions of conduit, is used
Elapsed to long side direction after short side direction casting complete, directly pour completion in order successively, while absolute altitude detection is carried out, until
Stop after meeting design back cover absolute altitude.
Comparative example 2
The construction method of certain Huanghe River Highway Bridge 112# pier concrete sealing bottoms：
（1）Substrate is constructed：4.8*5.28m points is substantially pressed for 20 areas according to steel sheet-pile cofferdam area, excavates site setting every
Individual regional center (RC) position, based on mud pumping mud, foundation ditch is carried out under water supplemented by long-armed digging machine underwater excavation to each region
Excavate, and use more than the water surface based on measurement, the method for being aided with submarine inspection carries out absolute altitude detection, after meeting design substrate absolute altitude
Stop, forming substrate；
（2）Back cover is constructed：Back cover conduit is respectively arranged according to subregion, using two groups of symmetrical concrete pouring constructions of conduit, is used
Elapsed to long side direction after short side direction casting complete, when pouring three rows, pour point moves to the 5th and discharges into capable cast, while
Absolute altitude detection is carried out, is stopped after meeting design back cover absolute altitude.
To above-described embodiment 1（115#）, embodiment 2（109#）Comparative example 1（114#）With comparative example 2（112#）Construction method
The concrete sealing bottom for obtaining is detected and counted, as a result as follows：
| Sequence number | Design thickness (m) | Actual measurement thickness (m) | Back cover quality | ||
| Embodiment 1 | 2 | 2.3 | 100 | 1034 | It is good |
| Embodiment 2 | 2 | 2.3 | 75 | 1058 | It is good |
| Comparative example 1 | 2 | 2.3 | 100 | 1043 | Typically |
| Comparative example 2 | 2 | 2.3 | 0 | 1138 | Typically |
Knowable to above-mentioned detection and statistics, underwater concrete back cover is carried out using construction method of the present invention, can significantly improved
Back cover quality, reduces concrete amount.
Claims (10)
1. a kind of construction method of steel sheet-pile cofferdam concrete sealing bottom, it is characterised in that comprise the following steps：
（1）Substrate is constructed：Subregion is carried out according to steel sheet-pile cofferdam area, and each region is excavated respectively and absolute altitude inspection
Survey, stop after meeting design substrate absolute altitude, form substrate；
（2）Cushion construction：Blotter is laid in the substrate；
（3）Back cover is constructed：Back cover conduit is respectively arranged according to subregion, and concreting is carried out by back cover conduit, while entering
Rower high detection, stops after meeting design back cover absolute altitude；
The pouring order of concrete is：Poured since the region at cofferdam edge, gradually advanced to cofferdam central area,
Finally terminate to pour with cofferdam central area.
2. construction method according to claim 1, it is characterised in that the area per area is pressed to the subregion in cofferdam in step 1
It is 10-30m2Divided.
3. construction method according to claim 1, it is characterised in that digging mode includes mud pumping mud, digs in step 1
Machine excavate in one or two.
4. construction method according to claim 1, it is characterised in that in step 1 detection mode of absolute altitude include the water surface with
One or two in upper measurement, submarine inspection.
5. construction method according to claim 1, it is characterised in that the blotter thickness control described in step 2 exists
10-50cm。
6. construction method according to claim 1, it is characterised in that the blotter described in step 2 is slabstone bed course.
7. construction method according to claim 1, it is characterised in that back cover conduit laying time control conduit mouth in step 3
It is 10cm~15cm apart from substrate level.
8. construction method according to claim 1, it is characterised in that in step 3 in concreting process, pours except first
Build a little outer, subsequent sections pour a position and need to first insert the catheter into concrete, and can just carry out after draining conduit internal water accumulation with water pump
The perfusion of concrete.
9. construction method according to claim 1, it is characterised in that use multiple spot in step 3 in concreting process
The method for pouring simultaneously is poured.
10. construction method according to claim 1, it is characterised in that concrete is that the slump is 180mm- in step 3
The concrete of 240mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710147175.9A CN106812146A (en) | 2017-03-13 | 2017-03-13 | A kind of construction method of steel sheet-pile cofferdam concrete sealing bottom |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710147175.9A CN106812146A (en) | 2017-03-13 | 2017-03-13 | A kind of construction method of steel sheet-pile cofferdam concrete sealing bottom |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106812146A true CN106812146A (en) | 2017-06-09 |
Family
ID=59115157
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710147175.9A Pending CN106812146A (en) | 2017-03-13 | 2017-03-13 | A kind of construction method of steel sheet-pile cofferdam concrete sealing bottom |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106812146A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158625A (en) * | 2019-06-24 | 2019-08-23 | 中铁四局集团第二工程有限公司 | Steel sheet pile cofferdam layered bottom sealing structure and method under silt geological condition |
| CN110965556A (en) * | 2019-11-20 | 2020-04-07 | 中建桥梁有限公司 | Large-area underwater concrete pouring method |
| CN113026781A (en) * | 2021-03-18 | 2021-06-25 | 中铁四局集团有限公司 | Bearing platform fore shaft steel pipe pile cofferdam back cover structure and construction method thereof |
| CN114645549A (en) * | 2020-12-21 | 2022-06-21 | 中交第二公路工程局有限公司 | Construction method of steel sheet pile cofferdam |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101235648A (en) * | 2008-01-04 | 2008-08-06 | 贵州省桥梁工程总公司 | Underwater bridge foundation construction method |
| US20120224920A1 (en) * | 2011-03-04 | 2012-09-06 | Weekly Bros. Inc. | Cofferdam modules |
| CN104294835A (en) * | 2014-10-14 | 2015-01-21 | 中国水利水电第四工程局有限公司 | Steel sheet pile cofferdam constructing method |
| CN105544569A (en) * | 2015-12-11 | 2016-05-04 | 中铁大桥局集团第二工程有限公司 | Block-by-block bottom sealing method for steel sheet pile cofferdam |
-
2017
- 2017-03-13 CN CN201710147175.9A patent/CN106812146A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101235648A (en) * | 2008-01-04 | 2008-08-06 | 贵州省桥梁工程总公司 | Underwater bridge foundation construction method |
| US20120224920A1 (en) * | 2011-03-04 | 2012-09-06 | Weekly Bros. Inc. | Cofferdam modules |
| CN104294835A (en) * | 2014-10-14 | 2015-01-21 | 中国水利水电第四工程局有限公司 | Steel sheet pile cofferdam constructing method |
| CN105544569A (en) * | 2015-12-11 | 2016-05-04 | 中铁大桥局集团第二工程有限公司 | Block-by-block bottom sealing method for steel sheet pile cofferdam |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110158625A (en) * | 2019-06-24 | 2019-08-23 | 中铁四局集团第二工程有限公司 | Steel sheet pile cofferdam layered bottom sealing structure and method under silt geological condition |
| CN110158625B (en) * | 2019-06-24 | 2024-05-14 | 中铁四局集团有限公司 | Layered bottom sealing structure and method for steel sheet pile cofferdam under geological condition of muddy silt |
| CN110965556A (en) * | 2019-11-20 | 2020-04-07 | 中建桥梁有限公司 | Large-area underwater concrete pouring method |
| CN114645549A (en) * | 2020-12-21 | 2022-06-21 | 中交第二公路工程局有限公司 | Construction method of steel sheet pile cofferdam |
| CN113026781A (en) * | 2021-03-18 | 2021-06-25 | 中铁四局集团有限公司 | Bearing platform fore shaft steel pipe pile cofferdam back cover structure and construction method thereof |
| CN113026781B (en) * | 2021-03-18 | 2023-03-10 | 中铁四局集团有限公司 | Bearing platform fore shaft steel pipe pile cofferdam back cover structure and construction method thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104196034B (en) | A kind of utilize steel sheet pile as the foundation ditch construction method in supporting cofferdam | |
| CN106812146A (en) | A kind of construction method of steel sheet-pile cofferdam concrete sealing bottom | |
| CN105040595A (en) | Bridge main pier bearing platform foundation pit supporting structure on gentle slope riverbed bedrock and construction method thereof | |
| CN108797618A (en) | One kind being used for Urban Underground pipe gallery drainage of foundation pit structure and its construction method | |
| CN113006108B (en) | Construction method of film bag sand cofferdam | |
| CN108457289A (en) | A kind of open caisson construction method of complex condition | |
| CN108316283A (en) | The devices and methods therefor of influence of foundation excavation is controlled using hole rising pouring slurry ground-connecting-wall | |
| CN105332382B (en) | Adjacent river foundation ditch builds island cofferdam clay water stop construction method | |
| CN107606305A (en) | A kind of underground water abundance of water area gas pipeline erection method | |
| CN113006144B (en) | Permeable structure tunnel structure | |
| CN109610429A (en) | Sedimentation treatment method under a kind of Collapsible Loess District prevention gas collection station ground and terrace | |
| CN218148458U (en) | Deep water deep foundation pit drainage system of fissure development rock stratum | |
| CN110206062A (en) | The dark construction method of underground river shallow embedding is worn under a kind of Urban Underground pipe gallery | |
| CN108316237B (en) | Revetment retaining wall | |
| CN102021912A (en) | Method for constructing special shaped deepwater cofferdams on steep rocky riverbeds | |
| CN109183964A (en) | A kind of storage pond construction method | |
| CN104846837A (en) | Construction method for ultra-deep well pit in surface drainage foundation pit | |
| CN105064373A (en) | Foundation pit supporting structure of bridge main pier bearing platform on river channel steep slope bedrock and construction method thereof | |
| CN115614542A (en) | Pipe jacking construction method taking existing foundation pit in water as starting point | |
| CN204875807U (en) | Bridge main pier cushion cap foundation pit supporting structure on river channel abrupt slope basement rock | |
| CN209837067U (en) | Plugging structure of base exploration hole piping in foundation pit | |
| CN202577341U (en) | Pipe section foundation of large-scale immersed pipe tunnel | |
| CN105220696A (en) | Rotating-milling formula deep-layer stirring construction method of enclosure structure | |
| CN101608457B (en) | Method for processing wharf foundation by geotextile granular material pile | |
| CN108611941A (en) | Method for processing saturated high-fill roadbed |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170609 |