CN107059902A - A kind of reusable steel boxed cofferdam structure and its construction method - Google Patents
A kind of reusable steel boxed cofferdam structure and its construction method Download PDFInfo
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- CN107059902A CN107059902A CN201710464376.1A CN201710464376A CN107059902A CN 107059902 A CN107059902 A CN 107059902A CN 201710464376 A CN201710464376 A CN 201710464376A CN 107059902 A CN107059902 A CN 107059902A
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- cofferdam
- coxopodite
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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
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
Abstract
The invention discloses a kind of reusable steel boxed cofferdam structure and construction method, belong to technical field of bridge construction.The precast-boxed cofferdam is that inside and outside wallboard connects to form body structure by horizontal ring flat-plate and horizontal support, it is made up of coxopodite section and at least one epimerite section, the multiple locking nubs in each section point, vertical shifting board is set between per locking nub, be connected setting horizonal base plate in section bottom with coxopodite section, horizonal base plate perforate and conduit is set in each separation, pass through conduit and carry out coxopodite section nacelle filling concrete；First assembly coxopodite section during construction, under discharge water, symmetrical assembled next block successively, then successively other assembled sections to sinking to completing；Construction is completed, and wallboard inside and outside the section of cutting horizontal bottom plate bottom, upper several sections are floated, and segmented successively and locking nub is removed and floats up to completion.Simple in construction, reasonable in design, easy construction of the invention, can be used to different size piers and different water depth constructions by increasing and decreasing section number and symmetrical locking nub of removing, saves material, reduce construction cost.
Description
Technical field
The present invention relates to technical field of bridge construction.
Background technology
Due to the superiority in terms of steel construction processing, transport, sinking conveniently, steel boxed cofferdam is applied more and more widely
In the foundation construction of large-sized deep water bridge.Double-Wall Steel Boxed Cofferdam is a kind of cofferdam form of Bridges in Our Country technical staff invention, it
The Jiujiang Bridge over Yangtse River seventies in last century is come across first, it is therefore intended that solve flood period construction problem and cofferdam is crossed big vast safety and asked
Topic.For the cofferdam of other forms, Double-Wall Steel Boxed Cofferdam has the following advantages that：1. larger hydraulic pressure can be born so that flood
The construction of water phase is possibly realized；2. Double-Wall Steel Boxed Cofferdam is rigidly big, can bear to pressure from inside to outside, security is higher；3. double-walled
Steel cofferdam process is simple, and groundwork is exactly cofferdam spelling, inhales the clear base of mud convenient.It is fixed against and sets in field of engineering technology construction
Meter, design always as much as possible meets economical under the premise of security applicability durability is met.
Difference pier cap size need to design different steel cofferdams at present, and steel cofferdam is mostly disposable, waste of materials, is led
Cost increase is caused, it is therefore necessary to design a kind of new steel boxed cofferdam structure that can be reused.
The content of the invention
The technical problem to be solved in the present invention is that there is provided a kind of reusable steel for above-mentioned the deficiencies in the prior art
Precast-boxed cofferdam structure and its construction method, this is simple in construction, reasonable in design, and stability is good, easy construction, by being divided into section
Section, the method for locking nub, increase and decrease section number and the locking nub number symmetrically gone are to be applicable to various sizes of pier and different water
Deep construction, it is not necessary to redesign a variety of steel boxed cofferdams, can reuse steel cofferdam locking nub in various sizes of pier, save material
Material, reduces construction cost.
Common steel cofferdam of the prior art need to design sizes according to different pier caps, and be disposably to make mostly
With, locking nub recycling is difficult, waste of materials and cause cost to increase.
In order to solve the above technical problems, the technical solution used in the present invention is：A kind of reusable steel jacket box encloses
Weir structure, including outer wall panel and inwall panel, steel boxed cofferdam are that outer wall panel and inwall panel pass through horizontal support and water
Flat ring plate connects to form body structure, and it includes stacking gradually the coxopodite section of connection and at least one epimerite from bottom to top
Section, each section is divided into some locking nubs, and the locking nub of same section is highly equal, and vertical shifting board is provided between every locking nub, with
The bottom of the connected section of coxopodite section is provided with the horizonal base plate of closing, each separation horizonal base plate perforate and sets concrete to lead
Pipe, tremie enters coxopodite Duan Bi cabins through horizonal base plate.
Preferably, being provided with several vertical wallboard ribbed stiffeners on the inside of the outer wall panel and inwall panel.
It is further preferred that the steel boxed cofferdam internal water level land is provided with several inner support steel pipes.
Still more preferably, the agent structure of the steel boxed cofferdam is Q235B steel members；The outer wall panel and interior
Wall board is 6 millimeters of steel plates, and horizontal support is 8 millimeters of angle steel, and horizontal ring flat-plate is 10 millimeters of steel plates, shifting board and horizonal base plate
It is 10 millimeters of steel plates；Use and be welded to connect between per section and per locking nub.
It is a kind of to reuse the construction method of steel boxed cofferdam structure, comprise the following steps：
1）Steel boxed cofferdam is divided into some sections, is divided into some locking nubs per section, vertical shifting board is provided between every locking nub,
Be connected with the coxopodite section bottom of section is provided with the horizonal base plate of closing, each separation horizonal base plate perforate and sets concrete
Conduit, tremie enters coxopodite Duan Bi cabins through horizonal base plate, and coxopodite section nacelle concrete is carried out by tremie
Perfusion；
2）First assembly coxopodite section during construction, under discharge water, coxopodite section fill concrete is poured to away from horizonal base plate and reserve coxopodite
Section cofferdam cutting position, and water filling makes first layer epimerite sink in backward wall cabin；According to symmetrical assembled locking nub, connect high cofferdam, by
The method of section sinking section, makes the epimerite positioned at first layer epimerite upper strata sink section by section, makes sinking of cofferdam to designed elevation；
3）After the completion of construction, the water filling into steel bushing tank wall cabin, in reserved cutting position cutting horizontal bottom plate bottom section inside and outside wall
Plate, under water divider base section and first layer epimerite；Using the horizonal base plate of watertight, the water in a certain amount of wall cabin is extracted out by several times, control
Water level in nacelle processed, making cofferdam, section floats section by section, splits locking nub along assembled weld seam, by assembled opposite sequence, is used for after trimming
The construction of next pier.
Preferably, step 1）The described mode that steel boxed cofferdam is divided into some sections is that steel boxed cofferdam edge is high
Degree direction is divided into some sections；Several locking nubs height divided per section is equal.
It is further preferred that step 2）Specific implementation method comprise the following steps：
1）Factory processes locking nub according to design requirement, is assemblied into section in pre-splicing place and is ready for construction after the assay was approved；
2）High steel cofferdam is followed by completing bored pile construction, and bracket is set on the water surface, building bracket on the outside of steel pile casting
Platform is used for assembled coxopodite section cofferdam, and measurement rectification work is carried out simultaneously, it is ensured that every locking nub accurate positioning, make every locking nub level with
Vertically；
3）In cofferdam construction, steel pile casting is slotted and interim hangar system is installed, after the completion of coxopodite section cofferdam is assembled, ox is cut off
Leg platform, in being discharged water using hoist engine under coxopodite section, is carried out coxopodite section nacelle filling concrete by tremie, makes bottom
Section sinking certain altitude, symmetrical assembly first layer epimerite, gradation casting concrete or into wall cabin water filling make first layer epimerite
Sink, in the same way again successively other assembled sections to sinking to completing；The fill concrete of wherein coxopodite section is at most poured
Stop to cutting position is reserved away from first layer epimerite horizonal base plate, water filling can then make into wall cabin under the continuation of first layer epimerite
It is heavy.
Still more preferably, the scope of the reserved cutting position is 0.2~1 meter.
Still more preferably, the construction method is by increasing and decreasing the locking nub number of section number and symmetrical region, with suitable
The construction of different size piers and the depth of water is answered, realizes that locking nub is reused；According to the cushion cap absolute altitude and cushion cap of each pier footing
The actual (real) thickness adjustment coxopodite and the height of first layer epimerite of bottom sludge layer, assembled good steel boxed cofferdam have watertightness.
Still more preferably, the concrete is C30 grades of concrete.
It is using the beneficial effect produced by above-mentioned technical proposal：The present invention provides a kind of reusable steel jacket box
Cofferdam structure and its construction method, this is simple in construction, reasonable in design, and stability is good, easy construction, by being divided into section, section
The method of block, increase and decrease section number and the locking nub number symmetrically gone are to be applicable to applying for various sizes of pier and different water depth
Work, it is not necessary to redesign a variety of steel boxed cofferdams, can reuse steel cofferdam locking nub in various sizes of pier, utilize second section
The horizonal base plate of cofferdam watertight, by the buoyancy of water, makes the method that coxopodite top cofferdam is floated obtain coxopodite top cofferdam section
With recycling, this steel boxed cofferdam structure and its construction method can save material, easy construction and reduction construction cost.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the structural representation of another angle of the invention
In figure：1st, outer wall panel；2nd, inwall panel；3rd, wallboard ribbed stiffener；4th, horizontal support；5th, horizontal ring flat-plate；6th, shifting board；7、
Horizonal base plate；8th, tremie；9th, inner support steel pipe；10th, pier shaft；11st, cushion cap；12nd, drilled pile.
Embodiment
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description, it is clear that disclosed below
Embodiment be only the present invention a part of embodiment, rather than whole embodiment.Based on embodiments of the invention, ability
Domain those of ordinary skill is all to be made on the basis of technical scheme on the premise of creative work is not made
Any modification, equivalent substitution and improvements etc., should be included within the scope of the present invention, belong to the scope of protection of the invention.
Embodiment 1
A kind of reusable steel boxed cofferdam structure, including outer wall panel and inwall panel, steel boxed cofferdam is by outside wall surface
Box-like structure is formed by horizontal support 4 and the connection of horizontal ring flat-plate 5 between plate 1 and inwall panel 2；Steel boxed cofferdam is along height side
To four sections are divided into, coxopodite section J1, second section J2, the 3rd section J3, fourth segment J4 are followed successively by from bottom to top,
Ten locking nubs are divided into per section, symmetrically assembled by ten contour locking nubs, ten locking nubs are respectively A and A' areas, B and B'
Area, C and C' areas, D and D' areas, E and E' areas, wherein, A areas are identical with A' plot structure blocks, and other blocks are also identical by that analogy；
Per vertical shifting board 6 is provided between locking nub, the inner side of outer wall panel 1 and inwall panel 2 is provided with several vertical walls
Plate ribbed stiffener 3, second section J2 bottom is provided with the horizonal base plate 7 of closing, each separation the perforate of horizonal base plate 7 and set
Tremie 8, tremie 8 enters coxopodite J1 walls cabin through horizonal base plate 7, and steel boxed cofferdam is internally provided with several
The inner support steel pipe 9 of level.
Herein it should be noted that the agent structure of the steel boxed cofferdam of the present invention uses steel matter, and steel matter
It is Q235B；MAT'L specification meets《Carbon structural steels》（GB1700-2006）Requirement, it is used in this construction method
The grade of concrete be C30；Outer wall panel 1 and inwall panel 2 are using 6 millimeters of steel plates, and wallboard ribbed stiffener 3 is ∠
75x50x8mm angle steel, horizontal support 4 uses ∠ 75x75x8mm angle steel, and horizontal ring flat-plate 5 uses 250mm（It is wide）x10mm（It is thick）Steel
Plate, shifting board 6 and second section J2 horizonal base plates 7 use 10mm steel plates, and set three layers of well word support altogether, and three layers of well word support use φ
630*10mm steel pipes, the power transmission of steel pipe is completed using force transmission rack, wherein, per section, connected mode uses weldering between every locking nub
Connect in succession.
The construction method of above-mentioned reusable steel boxed cofferdam structure, specifically includes following steps：
In design, comprehensive various situations, first investigation obtain pier job location geological hydrology and construction drawing, according to investigation
As a result section quantity and size are reasonably divided, cofferdam is designed and produced according to different pier sizes and the depth of water, by cofferdam along highly
Direction classifying rationally is four sections, and ten contour locking nubs are divided into per section, per locking nub between shifting board 6 is set, the
Two section J2 cofferdam bottoms set the horizonal base plate 7 of closing, and horizonal base plate 7 reserves the passage of tremie 8, assembled good steel cofferdam
Should integrally have watertightness；Design requirement machining cell block is pressed by factory, and in pre-splicing place, assembly is constructed after the assay was approved；Adopt
The inwall panel 2 of each locking nub, outer wall panel 1 are connected to form casing by horizontal ring flat-plate 5 and horizontal support 4 with welding manner
Structure；Vertical wallboard ribbed stiffener 3 and shifting board 6 is welded on the wallboard of each locking nub, and requires watertight.
During cofferdam construction, complete after drilled pile construction, connect high steel pile casting, bracket is set on the outside of steel pile casting on the water surface,
Coxopodite platform for lining is built, first in the assembled coxopodite section J1 cofferdam of platform, measurement rectification work is carried out simultaneously, it is ensured that locking nub is positioned
Accurately, locking nub abswolute level is made and vertical；Steel pile casting is slotted and interim hangar system is installed, interim corbels support is cut off and puts down
Platform, in being discharged water using hoist engine under coxopodite section J1, is carried out coxopodite section J1 nacelle filling concretes by tremie 8, made
Coxopodite section J1 sinking certain altitudes, symmetrical assembly second section J2, calculate the amount of pouring of coxopodite section J1 concrete, at most make coxopodite
Section J1 fill concretes are poured to when reserving 0.5 meter of coxopodite section J1 cofferdam cutting position away from second section J2 cofferdam horizonal base plate 7
Stop, then water filling second section J2 cofferdam can be made to continue to sink into wall cabin；According to symmetrical assembled locking nub, connect high cofferdam, by
The method of section sinking section, makes the 3rd section J3, fourth segment J4 sink section by section, makes sinking of cofferdam to designed elevation；Inhaled
Mud sinks, blocked, sand bedding course is filled, pour bottom concrete, installation inner support of drawing water steel pipe 9, clear base, steel pile casting are cut off, stake
The construction for process that head is cut, pier is poured etc..
After the completion of construction, to prevent the floating for cutting off cofferdam after coxopodite J1 highly excessive, the water filling into steel bushing tank wall cabin,
Wallboard inside and outside coxopodite section J1 under reserved cutting position imderwater cutting horizonal base plate；Divider base section J1 and second section under water
J2；Using the horizonal base plate 7 of the second section J2 bottoms of watertight, extract out by several times in the water in a certain amount of wall cabin, control cabinet body
Water level, makes fourth segment J4 cofferdam float, and splits locking nub along assembled weld seam, by assembled opposite sequence, in the same way, makes to enclose
Section floats section by section on weir, splits locking nub along assembled weld seam, by assembled opposite sequence, the construction of next pier is used for after trimming
Wherein it should be noted that in design, comprehensive various situations, first investigation obtain pier job location geological hydrology with
And construction drawing, section quantity and size are reasonably divided according to investigation result, is drawn according to the different Sizes of 10 cushion cap of bridge pier 11
Merogenesis block length and height, symmetrically divide locking nub according to section size reasonable, make the change of the increase and decrease corresponding depth of section, make
The change of the various pier sizes of increase and decrease correspondence of locking nub.
Herein it should be noted that the steel bushing box structure of the present invention is applied to the construction of underwater support table 11, according to each
The height of the absolute altitude of cushion cap 11 of pier footing and the actual (real) thickness adjustment coxopodite section J1 and second section J2 of the bottom sludge of cushion cap 11 layer
Spend to adapt to the constructions of different size piers and the depth of water, can also by increase and decrease the steel boxed cofferdam locking nub number water in B and B' areas with
The construction of different size piers and the depth of water is adapted to, realizes that locking nub is reused.
It should be noted that wall cabin planted agent keeps certain water level in work progress, its height is according to bottom concrete top
Depending on absolute altitude and water level elevation, in principle in both intermediate ranges；The water filling into cofferdam and in nacelle if necessary, keeps reasonable
Inside and outside head difference；Shifting board alignment above and below being required in assembly, the alignment of adjacent level ring flat-plate, vertical ribs 3 allows not up and down
Alignment, but must be welded with horizontal ring flat-plate 5, welding quality all should meet requirement, and wallboard, separation plate welding seams must be oozed by kerosene
Saturating experimental check, inside and outside wall steel plate edge joint position pastes weldering using 0.3x0.15m@0.5m pasting boards, and pasting board and wallboard require full weld, and protect
Demonstrate,prove watertightness.
It can further be stated that all whole steel, welding rods used etc. in the steel bushing box structure and construction method of the present invention
Main material all should meet the requirement of design document and current standard and have product certificate, otherwise should carry out mechanics, chemistry
And weldability test；Steel surface used answers smooth bright and clean, finds the defect of influence intensity and deformation, should abrogate and use；Steel bushing
Before case is started from, workmen should be familiar with and check whole drawings, draw craft exploded view etc., using appropriate welding procedure
And welding parameter；Making required precision all should be met by making the workbench in place, flatness；Steel jacket box piecemeal is made after one,
Answer measuring unit product overall dimension, it is errorless on inspection after, then make second, two blocks through examination it is assembled it is qualified after, can criticize
Amount production；Steel jacket box builds connection using welding, and when welding processing component is manufactured, process unit should formulate severe action, excellent
Change construction technology, reduce component machining deformation, reduce weld residual stress, deformation occur should correct in time；Weld seam intersection, must
The processing that must adopt an effective measure prevents stress concentration；During Member Welding spreading, process unit must in strict accordance with construction drawing and
Corresponding evaluation of engineering quality standard and manufacture of steel structure quality control standards (QCS) strict implement；Wallboard requires watertight with shifting board,
Weld seam should carry out watertightness inspection.Each unit（Segmentation）Manufactured on moulding bed, each several part foozle ± 5mm, it is ensured that structure
Assembled size and welding quality；Postwelding should be corrected, according to《Structural steelwork and acceptance specification》Inspected for acceptance, and carried
For welding procedure quality examination report；Steel jacket box completes be delivered for use before, manufacturer should provide detailed self-inspection data,
Quality inspection personnel, workmen and designer's reply casing endure strict scrutiny examinations, can be come into operation after signing in many ways；It is flat
Face size：Steel cofferdam inner side wall plate is cushion cap template, should strictly control inner side wall plate size, its size should be with design requirement phase
Symbol.The length allowable error of length and width both direction is respectively ± 20mm, and inner side wall plate surface irregularity should be less than 0.5mm；Steel plate
Blanking should use plate shearing machine or surface trimming, and jigsaw weld root catching groove welding, butt weld will ensure through welding；Steel cofferdam plus
Work manufacture will select the producer for meeting regulation qualification of technology and experience；Weld bead height should weld enough by design size, ribbed stiffener
It is bilateral intermittent weld 75 between wallboard（150）Mm, i.e. fusion length 150mm, disconnect 75mm, and both sides interlock welding, weld seam height
Spend 6mm；It is bilateral sequential welding, weld bead height 8mm between the ring flat-plate of horizontal support, the backing plate of shifting board and wallboard；Horizontal support
Angle steel uses three face weld all arounds with ring flat-plate, and Size of welds takes 8mm, and limb backweld length is no less than 130mm, and acropodium weld seam length is no less than
60mm, the welding of remaining each component uses sequential welding, and weld bead height is 1.2 times of thickness of slab, and butt weld requires through welding；It is each to spell
Fill unit（Segmentation）Hanger, by manufactory according to each lifting unit weight designed, designed process；Steel jacket box is fabricated：
Carry out, transported after the completion of manufacture to scene in factory, transportation ensures that casing block part is indeformable and does not sustain damage, constructed
Due to other factors local damage and breakage occur for Cheng Zhong, steel jacket box, answer timely remediation.
In a word, the present invention it is simple in construction, reasonable in design, stability is good, by be divided into section, locking nub method, increase and decrease
Section number and the locking nub number symmetrically gone are to be applicable to the construction of various sizes of pier and different water depth, it is not necessary to redesigned
A variety of steel boxed cofferdams, can reuse steel cofferdam locking nub in various sizes of pier, utilize the level of second section cofferdam watertight
Bottom plate, by the buoyancy of water, enables the method that coxopodite top cofferdam is floated to make the cofferdam section recycling of coxopodite top, this
Steel boxed cofferdam structure and its construction method can save material, easy construction and reduction construction cost.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or using the present invention,
A variety of modifications to the present embodiment will be apparent for those skilled in the art, those skilled in the art's root
Go out the product of other structures according to the principle design of the present invention, belong to protection scope of the present invention, the present invention will not be limited
In embodiment illustrated herein, and it is to fit to the most wide scope consistent with features of novelty with principles disclosed herein.
Claims (10)
1. a kind of reusable steel boxed cofferdam structure, including outer wall panel（1）With inwall panel（2）, it is characterised in that：
The steel boxed cofferdam is outer wall panel（1）With inwall panel（2）Pass through horizontal support（4）With horizontal ring flat-plate（5）Connection is formed
Body structure, it includes stacking gradually the coxopodite section of connection from bottom to top（J1）And at least one epimerite section, each section
It is divided into some locking nubs, the locking nub of same section is highly equal, vertical shifting board is provided between every locking nub（6）, the coxopodite section
（11）Top be provided with reserved cutting position, with coxopodite section（J1）The bottom of connected section is provided with the horizonal base plate of closing
（7）, horizonal base plate in each separation（7）Perforate simultaneously sets tremie（8）, tremie（8）Through horizonal base plate（7）
Into coxopodite section（J1）Wall cabin.
2. a kind of reusable steel boxed cofferdam structure according to claim 1, it is characterised in that：The outside wall surface
Plate（1）With inwall panel（2）Inner side be provided with several vertical wallboard ribbed stiffeners（3）.
3. a kind of reusable steel boxed cofferdam structure according to claim 1, it is characterised in that：The steel jacket box
Cofferdam internal water level land is provided with several inner support steel pipes（9）.
4. a kind of reusable steel boxed cofferdam structure according to claim 1, it is characterised in that：The steel jacket box
The agent structure in cofferdam is Q235B steel members；The outer wall panel（1）With inwall panel（2）It is 6 millimeters of steel plates, level branch
Support（4）For 8 millimeters of angle steel, horizontal ring flat-plate（5）For 10 millimeters of steel plates, shifting board（6）And horizonal base plate（7）It is 10 millimeters of steel
Plate；Use and be welded to connect between per section and per locking nub.
5. a kind of construction method of reusable steel boxed cofferdam structure according to claim 1, it is characterised in that
Comprise the following steps：
1）Steel boxed cofferdam is divided into some sections, is divided into some locking nubs per section, vertical shifting board is provided between every locking nub
（6）, with coxopodite section（J1）The bottom of connected section is provided with the horizonal base plate of closing（7）, horizonal base plate in each separation（7）Open
Hole simultaneously sets tremie（8）, tremie（8）Through horizonal base plate（7）Into coxopodite section（J1）Wall cabin, passes through coagulation
Native conduit（8）Carry out coxopodite section（J1）Nacelle filling concrete；
2）First assembly coxopodite section during construction（J1）, under discharge water, make coxopodite section（J1）Fill concrete is poured to away from horizonal base plate
（7）With coxopodite section（J1）Reserved cutting position, and water filling makes first layer epimerite sink in backward wall cabin；According to symmetrical assembled section
Block, high cofferdam, the method for piecewise sinking section are connect, the epimerite positioned at first layer epimerite upper strata is sunk section by section, make sinking of cofferdam
To designed elevation；
3）After the completion of construction, the water filling into steel bushing tank wall cabin, in reserved cutting position cutting horizontal bottom plate（7）Inside and outside the section of bottom
Wallboard, under water divider base section（J1）With first layer epimerite；Utilize the horizonal base plate of watertight（7）, extract a certain amount of wall cabin out by several times
Water level in interior water, control cabinet body, making cofferdam, section is floated section by section, and locking nub is split along assembled weld seam, by assembled opposite sequence, whole
It is used for the construction of next pier after repairing.
6. a kind of construction method of reusable steel boxed cofferdam structure according to claim 5, it is characterised in that：
Step 1）The described mode that steel boxed cofferdam is divided into some sections is that along short transverse steel boxed cofferdam is divided into some sections
Section；Several locking nubs height divided per section is equal.
7. a kind of construction method of reusable steel boxed cofferdam structure according to claim 5, it is characterised in that：
Step 2）Specific implementation method comprise the following steps：
Factory processes locking nub according to design requirement, is assemblied into section in pre-splicing place and is ready for construction after the assay was approved；
High steel cofferdam is followed by completing bored pile construction, sets bracket flat on the water surface, building bracket on the outside of steel pile casting
Platform is used for assembled coxopodite section（J1）Cofferdam, measurement rectification work is carried out simultaneously, it is ensured that per locking nub accurate positioning, make every locking nub level
With it is vertical；
In cofferdam construction, steel pile casting is slotted and interim hangar system is installed, coxopodite section（J1）After the completion of cofferdam is assembled, cut off
Bracket platform, using hoist engine by coxopodite section（J1）Under discharge water, pass through tremie（8）Carry out coxopodite section（J1）Nacelle is mixed
Solidifying soil perfusion, makes coxopodite section（J1）Sinking certain altitude, symmetrical assembly first layer epimerite, gradation casting concrete or into wall cabin
Water filling makes first layer epimerite sink, in the same way again successively other assembled sections to sinking to completing；Wherein coxopodite section（J1）
Fill concrete at most pour to away from first layer epimerite horizonal base plate（7）Reserved cutting position stops, then can be into wall cabin
Water filling makes first layer epimerite continue to sink.
8. a kind of construction method of reusable steel boxed cofferdam structure according to claim 5, it is characterised in that：
The scope of the reserved cutting position is 0.2~1 meter.
9. a kind of construction method of reusable steel boxed cofferdam structure according to claim 5, it is characterised in that：
The construction method is by increasing and decreasing the locking nub number of section number and symmetrical region, to adapt to applying for different size piers and the depth of water
Work, realizes that locking nub is reused；According to the actual (real) thickness adjustment of the cushion cap absolute altitude of each pier footing and cushion cap bottom sludge layer
Coxopodite（J1）With the height of first layer epimerite, assembled good steel boxed cofferdam has watertightness.
10. a kind of construction method of reusable steel boxed cofferdam structure according to claim 5, its feature exists
In：The concrete is C30 grades of concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710464376.1A CN107059902B (en) | 2017-06-19 | 2017-06-19 | Construction method of reusable steel pouring jacket cofferdam structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710464376.1A CN107059902B (en) | 2017-06-19 | 2017-06-19 | Construction method of reusable steel pouring jacket cofferdam structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107059902A true CN107059902A (en) | 2017-08-18 |
| CN107059902B CN107059902B (en) | 2022-08-23 |
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Cited By (8)
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| CN108342993A (en) * | 2018-02-26 | 2018-07-31 | 利越集团有限公司 | A kind of underwater support table suspention support platform and its construction |
| CN109295858A (en) * | 2018-10-12 | 2019-02-01 | 中铁宝桥（扬州）有限公司 | The overall package moulding bed and its working method of a kind of double-walled combination bridge tower steel shell segment |
| CN109371997A (en) * | 2018-12-04 | 2019-02-22 | 中铁六局集团有限公司 | A kind of double-wall cofferdam and pier construction method |
| CN110130372A (en) * | 2019-05-31 | 2019-08-16 | 中建八局第四建设有限公司 | A kind of construction method in prestress anchorage cable cofferdam |
| CN110878556A (en) * | 2019-11-08 | 2020-03-13 | 中铁大桥局集团有限公司 | Construction method of deepwater cofferdam |
| CN113309121A (en) * | 2021-04-27 | 2021-08-27 | 中交一公局第八工程有限公司 | Construction process of floating-state high-double-wall steel box cofferdam for large-volume foundation in deep water |
| CN113550340A (en) * | 2021-07-23 | 2021-10-26 | 广州市市政工程机械施工有限公司 | Construction method of deepwater foundation of double-wall steel cofferdam without sealing bottom under deepwater rock entering condition |
| CN113585344A (en) * | 2021-08-10 | 2021-11-02 | 中船黄埔文冲船舶有限公司 | Immersed tunnel steel shell pipe joint bulkhead control method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108342993A (en) * | 2018-02-26 | 2018-07-31 | 利越集团有限公司 | A kind of underwater support table suspention support platform and its construction |
| CN109295858A (en) * | 2018-10-12 | 2019-02-01 | 中铁宝桥（扬州）有限公司 | The overall package moulding bed and its working method of a kind of double-walled combination bridge tower steel shell segment |
| CN109295858B (en) * | 2018-10-12 | 2023-11-28 | 中铁宝桥（扬州）有限公司 | Integral assembly jig frame for steel shell sections of double-wall combined bridge tower and working method thereof |
| CN109371997A (en) * | 2018-12-04 | 2019-02-22 | 中铁六局集团有限公司 | A kind of double-wall cofferdam and pier construction method |
| CN110130372A (en) * | 2019-05-31 | 2019-08-16 | 中建八局第四建设有限公司 | A kind of construction method in prestress anchorage cable cofferdam |
| CN110878556A (en) * | 2019-11-08 | 2020-03-13 | 中铁大桥局集团有限公司 | Construction method of deepwater cofferdam |
| CN110878556B (en) * | 2019-11-08 | 2021-07-20 | 中铁大桥局集团有限公司 | Construction method of deepwater cofferdam |
| CN113309121A (en) * | 2021-04-27 | 2021-08-27 | 中交一公局第八工程有限公司 | Construction process of floating-state high-double-wall steel box cofferdam for large-volume foundation in deep water |
| CN113550340A (en) * | 2021-07-23 | 2021-10-26 | 广州市市政工程机械施工有限公司 | Construction method of deepwater foundation of double-wall steel cofferdam without sealing bottom under deepwater rock entering condition |
| CN113585344A (en) * | 2021-08-10 | 2021-11-02 | 中船黄埔文冲船舶有限公司 | Immersed tunnel steel shell pipe joint bulkhead control method |
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