CN106498957B - Steel sheet pile cofferdam construction platform and integral construction method - Google Patents
Steel sheet pile cofferdam construction platform and integral construction method Download PDFInfo
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- CN106498957B CN106498957B CN201610905990.2A CN201610905990A CN106498957B CN 106498957 B CN106498957 B CN 106498957B CN 201610905990 A CN201610905990 A CN 201610905990A CN 106498957 B CN106498957 B CN 106498957B
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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
- 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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/46—Concrete or concrete-like piles cast in position ; Apparatus for making same making in situ by forcing bonding agents into gravel fillings or the soil
Abstract
The present invention provides a kind of steel sheet pile cofferdam construction platform, including one group of steel sheet pile, steel platform and rotary churning pile machine, the steel sheet pile point two sides are arranged in parallel to form cofferdam supporting, steel sheet pile bottom surface extends to cofferdam substrate or less, steel sheet pile top surface is higher than the water surface, and the steel sheet pile top surface sets up keel, and the steel platform is fixed on keel, corresponding operation hole is preset in the steel platform, the rotary churning pile machine is installed on operation hole.The invention also includes a kind of steel sheet pile cofferdam construction platform integral construction methods.Its difficulty of construction can be greatly reduced using the present invention, improve construction efficiency, there is better safety, economy, and platform material can be used in turn repeatedly, met building conservation requirement, had broad application prospects.
Description
Technical field
The present invention relates to the technical fields of construction more particularly to a kind of steel sheet pile cofferdam construction platform and integration to apply
Work method.
Background technique
Construction of High Pressure Jet Grouting Pile because its operation take up an area less, with small vibration, noise is lower, can significantly improve mud, muck soil,
Stream modeling, soft modeling or the bearing capacity of earthen foundations such as plastic cohesive soil, silt, sand, loess, plain fill and gravelly soil and closely knit
Degree, and be widely used in structure foundation consolidation process, water seal for deep foundation pit curtain, side slope earth-retaining or water blocking, bottom of foundation ditch reinforce,
Prevent piping and protuberance, underground large diameter pipeline from sealing and reinforcing, the soil layer of subway engineering is reinforced or waterproof, reservoir dam, sea
Dike, river dike, dam body seepage prevention of dam founda are reinforced, construct the engineerings such as underground reservoir seepage cutoff dam.It can be seen that its operation is usually in water ring
Among border, and its operation needs anhydrous environment and smooth job platform.If this contradiction can be dissolved, a kind of energy is developed
The construction method of anhydrous operation in water environment will increase substantially its construction efficiency, reduce security risk, while having saved and having applied
Work cost.
Summary of the invention
Based on the above the deficiencies in the prior art, technical problem solved by the invention is to provide a kind of steel sheet-pile cofferdam and applies
Work platform and integral construction method, this method technical feasibility, economical rationality, simple process, easy to operate, construction safety.
In order to solve the above-mentioned technical problem, the present invention is achieved through the following technical solutions: the present invention provides a kind of steel plate
Pile cofferdam operation platform, including steel sheet pile, steel platform and rotary churning pile machine, the steel sheet pile are arranged in parallel several in cofferdam two sides
It is a, form cofferdam supporting construction, the adjacent side of the adjacent steel sheet pile in every side is mutually twisted, steel sheet pile bottom surface extend to cofferdam substrate hereinafter,
Steel sheet pile top surface is higher than the water surface, fashioned iron keel is provided on the steel sheet pile, the fashioned iron keel are i shaped steel keel, described
Fashioned iron keel are located at two sides steel sheet pile top surface together across two sides steel sheet pile top surface, by setting gasket or cutting steel plate stake top face
One height is so that the fashioned iron keel of installation are in horizontality, and the steel platform is fixed on fashioned iron keel, and the steel platform is adopted
Panel is made with steel, several operation holes corresponding with construction point are offered in the steel platform, the operation hole is by preset
Aperture spacing, bore position and drill pipe diameter carry out aperture, and the rotary churning pile machine is installed on the operation hole of steel platform and passing through
Operation hole carries out piling work, and the steel platform back side setting cross rib and longitudinal rib are reinforced.
More preferably, the steel platform is further overleaf arranged cross rib and longitudinal rib is reinforced, the cross of setting after aperture
Rib and longitudinal rib need to avoid position of opening, and adjust cross rib and longitudinal rib radical according to loading capacity.
It further, further include by the way of riveting, welding, by steel platform after aperture and setting cross rib and longitudinal rib
It is fixed on fashioned iron keel, seam crossing is using the connection of the gaskets such as angle steel.
Further, the steel platform is put together by two pieces or more steel panels, and the splitting mode includes card
It connects, weld, rivet, or split is only carried out by the connection between steel panel and fashioned iron keel and is fixed
Further, the rotary churning pile machine can be moved with operation hole site, and the steel platform and keel can be in steel plate stake tops
It moves in face.
The invention also includes a kind of steel sheet pile cofferdam construction platform integral construction methods, comprising the following steps:
1, engineering sounding is carried out before construction, determines rotary churning pile strengthening construction relevant parameter；
2, several steel sheet piles are set in parallel along cofferdam two sides, without draining；
3, keep two sides steel sheet pile top surface horizontal by setting gasket or cutting of steel sheet pile, set up keel；
4, it in installing steel platform on keel, can select to be put together with two pieces of steel panels by requirement of engineering；
5, rotary churning pile machine is placed in relevant work preset in steel platform hole site；
6, rotary churning pile machine is moved on demand, or moves position of platform on demand, start to construct.
Further, further include before rotary churning pile machine is placed in relevant work hole site on be set forth in platform, according to default
Aperture spacing, position and drill pipe diameter aperture is carried out to platform, and cross rib and longitudinal rib are set in the steel platform back side and reinforced.
It further, further include adjusting whirl spraying after rotary churning pile machine is placed in relevant work hole site on be set forth in platform
The bottom of stake machine and top mark are high, remember row control by being marked on drilling rod, and drilling rod brill receipts bore length and are equal to platform height and stake bottom
The difference of elevation, drilling rod trip-out length are equal to the difference of platform height and height of pile top.
Compared with prior art, technical solution of the present invention has the following beneficial effects:
1, Underwater Soft Foundation high-pressure rotary jet grouting pile is handled, and is carried out not using integral movable type steel platform is set up on steel sheet-pile cofferdam
Drainage construction solves the problems, such as that cofferdam bottom application work needs dredging and fills bed course, and drainage construction does not make hydraulic pressure inside and outside cofferdam
Balance, it is ensured that the safety of cofferdam foundation pit also can be improved when subsequent construction is drawn water in cofferdam construction safety, the ground after reinforcing,
Job platform can be used in turn repeatedly simultaneously.
2, the aerial steel platform of high-pressure rotary jet grouting pile of constructing makees panel using steel plate, according to the rotary churning pile spacing of design on panel
With the preparatory aperture in aperture, traditional construction is avoided by the cumbersome of stake setting-out, is improved work efficiency.
Its difficulty of construction can be greatly reduced using the present invention, improve construction efficiency, there is better safety, economy,
And platform material can be used in turn repeatedly, met building conservation requirement, had broad application prospects.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects, features and advantages of the invention can
It is clearer and more comprehensible, below in conjunction with preferred embodiment, and cooperates attached drawing, detailed description are as follows.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, the attached drawing to embodiment is simply situated between below
It continues.
Fig. 1 is the design canal case foundation pit supporting construction cross-sectional view of the preferred embodiment of the present invention.
Fig. 2 is the rotary churning pile job platform schematic cross-sectional view of the preferred embodiment of the present invention.
Fig. 3 is the fashioned iron spine arrangement floor map of the preferred embodiment of the present invention.
Fig. 4 is the platform keel and steel sheet pile junction schematic diagram of the preferred embodiment of the present invention.
Fig. 5 is the job platform monolithic panel cut out floor map of the preferred embodiment of the present invention.
Fig. 6 is the job platform monolith surface backboard portion rib floor map in length and breadth of the preferred embodiment of the present invention.
Fig. 7 is the job platform splicing floor map of the preferred embodiment of the present invention.
Detailed description of the invention: 1- stull steel pipe；2- steel sheet pile；3- rotary churning pile；4- steel platform longitudinal rib；5- steel platform；6- rotary churning pile
Machine；7- steel platform cross rib；8- keel；9- steel plate gasket；10- angle steel；11- working hole；
Specific embodiment
The embodiment of the invention will now be described in detail with reference to the accompanying drawings, and as part of this specification passes through
Embodiment illustrates the principle of the present invention, and other aspects of the present invention, feature and its advantage will become by the detailed description
It is very clear.In the attached drawing of institute's reference, the same or similar component is indicated using identical drawing reference numeral in different figures.
Embodiment
One, embodiment Engineering Notice
The embodiment of the present invention is positioned at " big smooth husky sewage disposal system pipe network --- the mainstream Shi Jinghe (Shi Jinghe, Xin Shi
Gush) cut dirty canal case (section Shi Jing) engineering ", which will build the closed conduit of a 20km long under the riverbed for facing bank, and part is dark
The ground of canal need to be reinforced using high-pressure rotary jet grouting pile 3.This relates to the high in the following deep basal pit ground of depth of water 5m of large area
Press stir process.
The foundation pit bottom structures ground to border on the river is reinforced, 3 construction process of conventional foundation pit bottom rotary churning pile are as follows: foundation pit branch
Foundation pit bottom job platform → 3 operation of high-pressure rotary jet grouting pile is filled in protection structure construction → drainage of foundation pit →.The river in foundation pit need to be drained
Water removes the mud in foundation pit, fills the rubble of thick 30cm or more as 3 job platform of high-pressure rotary jet grouting pile, and a machine can be descended to make
Industry.Because foundation pit side is bordered on the river, hydraulic pressure is larger, infiltration state is chronically in foundation pit, and the substrate soil body is weak, will face in band water
In the environment of construct, without good piling platform, exist simultaneously how to be avoided when the walking of machine supporting construction stull construction it is tired
Rotary churning pile 3 that is difficult and can not constructing under stull, and exist cheat in piping, supporting structure water-leakage or even supporting construction unstability
It is dangerous.
The battle line that this requirement of engineering carries out 3 bottom stab ilization of rotary churning pile in view of this is up to 5.5km, and conventional foundation stabilization construction is difficult
Carry out.Construction thinking need to be changed, reform construction technology, construction target could be completed.It repeatedly holds a conference or consultation research through company technique team,
Before 3 operation of high-pressure rotary jet grouting pile is advanced to drainage of foundation pit process by imagination, the work of high-pressure rotary jet grouting pile 3 is set up on foundation pit supporting construction
Industry platform, rotary churning pile machine 6 carry out not draining on platform, and can walk to avoid stake machine need to avoid supporting construction stull in this way
Constructional difficulties, all multi-risk Systems in the operation of foundation pit bottom, the rotary churning pile 3 for solving the problems, such as not constructing under stull, while base
Hole has carried out the reinforcing of hole subsoil body before excavating, when reducing excavation pit, because of ground weakness bring piping in foundation pit, supporting knot
A series of risks such as structure unstability, this method not only saving of labor, section when, safety, but also have high economic benefit.Therefore company technique group
Team determines to make somebody a mere figurehead reinforcement construction technology using 2 cofferdam integration of steel sheet pile as research topic, it is desirable to for this kind of complex condition
3 operation of rotary churning pile provides a kind of advanced construction technology.
Two, construction technology process
1, engineering sounding.
This technology research is mainly with " big smooth husky sewage disposal system pipe-networks engineering --- the mainstream Shi Jinghe (Shi Jinghe, Xin Shi
Gush) cutting dirty canal case (section Shi Jing) engineering, " to rely on, the problem handled for its river bed canal case substrate rotary churning pile 3 is studied.
As shown in Figure 1, the engineering gushes two sides along the mainstream Shi Jinghe two sides, pool and belt high speed southern side road, Zhang Cun gush construction DN3000
Wastewater interception pipe and BXH=4.0 × 3.0~6.0 × 3.0,1.5 × 2.0 sections of dirty canal casees, cut dirty pipe duct and are always about 20.2km.Wherein
There is the river bed canal case of 5.5km that need to carry out 3 consolidation process of substrate rotary churning pile, design requirement rotary churning pile 3 reinforces groundwork bearing capacity not
Less than 120KPa, stull steel pipe 1 can be added fixed after the completion of construction.
High-pressure rotary jet grouting pile 3 diameter 0.5m, the long 3~12m of stake, quincuncial arrangement, cement consumption 200kg/m.Spacing
1000X1000, pile body enter not opposite pervious bed and are not less than 1.0m, slurries using No. 42.5 cement configurations, the ratio of mud for 0.8~
1.0, operating pressure pipeline and canal case allowable bearing capacity of foundation soil must reach 120KPa.
2, the structure design of 3 job platform of rotary churning pile.
As shown in Fig. 2, the 3 job platform structure of rotary churning pile design includes one group of steel sheet pile 2, steel platform 5 and rotary churning pile machine
6,2 points of two sides of the steel sheet pile are arranged in parallel to form cofferdam supporting, and 2 bottom surface of steel sheet pile extends to cofferdam substrate hereinafter, steel sheet pile 2 pushes up
Face is higher than the water surface, and 2 top surface of steel sheet pile sets up fashioned iron keel 8, and the steel platform 5 is fixed on fashioned iron keel 8, and the steel is flat
Corresponding operation hole is preset on platform 5, the rotary churning pile machine 6 is installed on operation hole.
More preferably, the steel sheet pile 2 can be arranged multiple along cofferdam two sides, and the adjacent side of adjacent steel sheet pile 2 is mutually twisted.
More preferably, the fashioned iron keel 8 are i shaped steel keel.
Using the steel sheet pile 2 of pattern foundation pit supporting structure as the support of 3 job platform of rotary churning pile, 3 operation of rotary churning pile is set up on it
Platform, the setting of job platform get rid of the constraint that routine work institute environment seriously affects, realize the anhydrous work of bottom stab ilization
The flatness and hardness of industry and work surface, improve pile quality.Entire job platform is made by fashioned iron and steel plate assembly simultaneously
It forms, is easy for installation and removal, can be used in turn repeatedly.
3, the keel 8 of 3 job platform of rotary churning pile are arranged.
As shown in Figures 3 and 4, foundation pit supporting construction causes 2 top surface absolute altitude of steel sheet pile irregular not because of the difference of geology hardness
Together, if it is desired to which job platform is in horizontality, and a pair of of fashioned iron keel 8 need to be arranged.By adding steel plate gasket 9 or cutting off steel
2 length of sheet pile adjusts two keel 8 to level, and keel 8 are fixed on steel sheet pile 2 with angle steel 10.
4, the design of 3 job platform panel of rotary churning pile
As shown in figure 5, the aerial steel platform 5 of construction high-pressure rotary jet grouting pile 3 makees panel using steel plate, according to design on panel
The preparatory aperture of 3 spacing of rotary churning pile and aperture, 11 aperture of working hole are slightly larger than 3 drill pipe diameter of rotary churning pile.Avoid traditional construction by
Stake setting-out it is cumbersome, improve work efficiency.
Further, as shown in fig. 6,5 back side of steel platform setting cross rib 7 and longitudinal rib 4 are reinforced.Cross rib 7 should be
It is arranged after steel plate aperture, avoidable and hole bit swiping, and cross rib and longitudinal rib radical are adjusted according to loading capacity.
Further, as shown in fig. 7, steel platform 5 is by two pieces or even muti-piece face to reduce the hoisting and hanging difficulty of flat surface
Plate is mutually spelled, and the splitting mode includes clamping, welding, riveting, or only passes through the company between steel panel and fashioned iron keel
Row split is tapped into fix.
It further, further include by the way of riveting, welding, by steel platform after aperture and setting cross rib and longitudinal rib
It is fixed on fashioned iron keel, seam crossing is using the connection of the gaskets such as angle steel.
Further, the rotary churning pile machine 6 can be moved with operation hole site, and the steel platform 5 and keel 8 can be in steel sheet piles
It moves 2 top surfaces.
Three, the mechanics feasibility analysis of 3 operation platform of rotary churning pile
(1) construction of job platform rotary churning pile 3 total load head
1., dead load: the weight of the steel plate of 4m*6m*5mm is about 1 ton, i.e. 10KN
2., mobile load: rotary churning pile machine 6+ operator+equipment shaking force, about 2 tons, i.e. 20KN
3., concentrated force: standard value Pk=Pg+Pq=10+20=30KN
Design value Pd=Pg* γ G+Pq* γ Q=10*1.2+20*1.4=40KN
(2) 5 fashioned iron longitudinal rib of steel platform, 4 [25a forcing checking
1., end reaction RA=RB=Pd/2=20KN
2., maximal bending moment Mmax=Pd*L/4=40KNM
3., bending normal stresses σ max=Mmax/ (γ x*Wx)=94.76N/mm2 < bending resistance design value f:215N/mm2 it is full
Foot requires！
4., shear stress τ A=τ B=RA*Sx/ (Ix*tw)=11.49N/mm2 < shear Design value fv:125N/mm2 meets
It is required that！
5., maximum defluxion fmax=Pk*L^3/48*1/ (E*I)=3.87mm < amount of deflection controlling value [v]: L/250 (22mm)
It meets the requirements！
(3) 8 I-steel I32a forcing checking of platform keel
1., dead load: steel plate+[weight of 25a channel steel is about 1.5 tons, i.e. 15KN
2., mobile load: rotary churning pile machine 6+ operator+equipment shaking force, about 2 tons, i.e. 20KN
3., concentrated force: standard value Pk=Pg+Pq=15+20=35KN
Design value Pd=Pg* γ G+Pq* γ Q=15*1.2+20*1.4=46KN
4., internal force calculated result
End reaction RA=RB=Pd/2=23KN
Maximal bending moment Mmax=Pd*L/4=78.2KN.M
5., intensity and rigidity checking result
Bending normal stresses σ max=Mmax/ (γ x*Wx)=107.62N/mm2 < bending resistance design value f:215N/mm2 meets
It is required that！
Shear stress τ A=τ B=RA*Sx/ (Ix*tw)=8.75N/mm2 < shear Design value fv:125N/mm2 satisfaction is wanted
It asks！
Maximum defluxion fmax=Pk*L^3/48*1/ (E*I)=10.04mm < amount of deflection controlling value [v]: L/250 (26mm) is full
Foot requires！
(4) forcing checking of Lashen IV type steel sheet pile 2 (support)
1., strength checking
2 size of Lashen IV type steel sheet pile are as follows: wide 400mm, high 170mm, thick 15.5mm, area of section 96.99cm2, inertia
Square Ix=4670cm4
σ=F/S=23*10^4/96.99=2372KPa=2.37MPa < [σ]=215MPa, meets the requirements.
2., Stability Checking
P=π2EI/(μl)2=3.14^2*210*10^6*4670*10^-8/100=1973.3KN
μ=2 (one section of freedom is fixed in one end)
1=3.5m (2 free end length of steel sheet pile)
R=23KN < P=1973.3KN, pressure bar stabilization！
In conclusion checking through theory of mechanics, 3 job platform of rotary churning pile meets construction requirement.
Four, reinforcement construction technology standard is maked somebody a mere figurehead in 2 cofferdam integration of steel sheet pile
Application of the technology through multiple projects, sums up following technical standard:
(1) reliability of 8 type steel model of reinforcing bar keel, 8 spacing of keel, the thickness of steel plate and support is determined by calculating, peace
Overall coefficient takes 1.2.
(2) stake position and spacing aperture, opening diameter >=drill pipe diameter 2cm, aperture interval error ± 1cm are pressed on steel plate.
(3) 8 interval errors of keel ± 1cm.
(4) 3 bottom of rotary churning pile and top mark high pass are marked on drilling rod remembers row control into.Drilling rod, which bores to receive, bores length=platform height
Journey-stake bottom elevation, drilling rod trip-out length=platform height-height of pile top.
It receives pile beacon and knows absolute altitude error+1cm, the mark that pulls out of hole absolute altitude error -1cm.
(5) piling platform should be installed smooth, and height difference answers≤2cm.
It can be seen from the above embodiments that, the present invention is handled by Underwater Soft Foundation high-pressure rotary jet grouting pile 3, using in steel sheet pile
Integral movable type steel platform 5 is set up on 2 cofferdam and carries out not drainage construction, and solving cofferdam bottom application work needs dredging and fill bed course
Problem, and drainage construction does not make hydraulic balance inside and outside cofferdam, it is ensured that and cofferdam construction safety, the ground after reinforcing are applied subsequent
When work is drawn water, the safety of cofferdam foundation pit also can be improved, while job platform can be used in turn repeatedly.Construction high-pressure rotary jet grouting pile
3 aerial steel platform 5 makees panel using steel plate, according to the preparatory aperture of 3 spacing of rotary churning pile and aperture of design on panel, avoids
Traditional construction is cumbersome by stake setting-out, improves work efficiency.
Its difficulty of construction can be greatly reduced using the present invention, improve construction efficiency, there is better safety, economy,
And platform material can be used in turn repeatedly, met building conservation requirement, had broad application prospects.
The above is a preferred embodiment of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, it is noted that for those skilled in the art, without departing from the principle of the present invention, may be used also
To make several improvement and variation, these, which improve and change, is also considered as protection scope of the present invention.
Claims (8)
1. a kind of steel sheet pile cofferdam construction platform, it is characterised in that: including steel sheet pile, steel platform and rotary churning pile machine, the steel plate
In cofferdam two sides several are arranged in parallel in stake, form cofferdam supporting construction, and the adjacent side of the adjacent steel sheet pile in every side is mutually twisted, steel plate
Stake bottom surface extends to cofferdam substrate hereinafter, steel sheet pile top surface is higher than the water surface, is provided with fashioned iron keel, the fashioned iron on the steel sheet pile
Keel are i shaped steel keel, and the fashioned iron keel pass through setting gasket or cutting steel plate stake top across two sides steel sheet pile top surface
Two sides steel sheet pile top surface is made to be located at sustained height for face so that the fashioned iron keel of installation are in horizontality, and the steel platform is fixed on
On fashioned iron keel, the steel platform makees panel using steel, and several works corresponding with construction point are offered in the steel platform
Industry hole, the operation hole carry out aperture by preset aperture spacing, bore position and drill pipe diameter, the rotary churning pile machine install in
Piling work is carried out on the operation hole of steel platform and by operation hole, the steel platform back side setting cross rib and longitudinal rib are added
Gu.
2. steel sheet pile cofferdam construction platform as described in claim 1, which is characterized in that the steel platform is after aperture, into one
Cross rib overleaf is arranged for step and longitudinal rib is reinforced, and the cross rib and longitudinal rib of setting need to avoid position of opening, and according to loading capacity tune
Whole cross rib and longitudinal rib radical.
3. steel sheet pile cofferdam construction platform as claimed in claim 2, which is characterized in that in aperture and setting cross rib and longitudinal rib
It afterwards, further include steel platform being fixed on fashioned iron keel, seam crossing is connected using angle steel gasket by the way of riveting, welding.
4. steel sheet pile cofferdam construction platform as claimed in claim 3, which is characterized in that the steel platform is by two pieces or more
Steel panel is put together, and the splitting mode includes clamping, welding, riveting, or only by steel panel and fashioned iron keel it
Between connection carry out split fix.
5. steel sheet pile cofferdam construction platform as claimed in claim 4, which is characterized in that the rotary churning pile machine is with operation hole site
It moves, the steel platform and fashioned iron keel are moved in steel sheet pile top surface.
6. a kind of steel sheet pile cofferdam construction platform integral construction method as described in any one of claim 1-5, special
Sign is, comprising the following steps:
(1) engineering sounding is carried out before construction, determines rotary churning pile strengthening construction relevant parameter；
(2) several steel sheet piles are set in parallel along cofferdam two sides, without draining；
(3) keep two sides steel sheet pile top surface horizontal by setting gasket or cutting of steel sheet pile, set up fashioned iron keel；
(4) it in installing steel platform on fashioned iron keel, selects to be put together with two pieces of steel panels by requirement of engineering；
(5) rotary churning pile machine is placed in relevant work preset in steel platform hole site；
(6) rotary churning pile machine is moved on demand, starts to construct.
7. a kind of steel sheet pile cofferdam construction platform integral construction method as claimed in claim 6, it is characterised in that: described
Further include before rotary churning pile machine is placed in relevant work hole site in steel platform, according to preset aperture spacing, position and drilling rod
Diameter carries out aperture to steel platform, and is reinforced in steel platform back side setting cross rib and longitudinal rib.
8. a kind of steel sheet pile cofferdam construction platform integral construction method as claimed in claim 6, it is characterised in that: described
Further include bottom and the top mark height for adjusting rotary churning pile machine after rotary churning pile machine is placed in relevant work hole site in steel platform, passes through
Bidding remembers row control on drilling rod, and the receipts of drilling rod bore the difference that length is equal to steel platform elevation and stake bottom elevation, the trip-out of drilling rod
Length is equal to the difference of steel platform elevation and height of pile top.
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| CN109898403A (en) * | 2019-04-02 | 2019-06-18 | 广州市恒盛建设工程有限公司 | The underwater canal case steel suspension bridge of urban rives construction method nested with double steel sheet-pile cofferdam |
| CN110468729B (en) * | 2019-09-09 | 2021-08-17 | 中铁八局集团昆明铁路建设有限公司 | Construction method of frame bridge |
| CN115059103A (en) * | 2022-07-01 | 2022-09-16 | 中交二航局第四工程有限公司 | Bearing platform cofferdam applied to deep sludge interlayer condition and construction process thereof |
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| JPH06220865A (en) * | 1993-01-27 | 1994-08-09 | Shimizu Corp | Double cofferdam process |
| CN201132960Y (en) * | 2007-11-05 | 2008-10-15 | 上海勘测设计研究院 | Composite batardeau of steel light structure |
| CN102363961B (en) * | 2011-11-11 | 2014-04-30 | 中交四航局第一工程有限公司 | Deepwater single-wall steel plate pile cofferdam structure with low buried depth and construction method thereof |
| CN202577325U (en) * | 2012-05-16 | 2012-12-05 | 科达集团股份有限公司 | Cofferdam collaborative operation device of steel pipe pile platform and steel board pile |
| CN104612120B (en) * | 2014-12-15 | 2016-08-17 | 中铁上海工程局集团有限公司 | A kind of integral construction method setting up platform about steel-pipe pile in water |
| CN104805854B (en) * | 2015-04-29 | 2017-03-08 | 中铁四局集团第二工程有限公司 | A kind of Deep Water Ultra-long steel sheet pile cofferdam construction method under tide environment |
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| CN106498957A (en) | 2017-03-15 |
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