CN108330995A - Construction method of steel sheet pile cofferdam in deep water thick silt layer environment - Google Patents
Construction method of steel sheet pile cofferdam in deep water thick silt layer environment Download PDFInfo
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- CN108330995A CN108330995A CN201810062753.3A CN201810062753A CN108330995A CN 108330995 A CN108330995 A CN 108330995A CN 201810062753 A CN201810062753 A CN 201810062753A CN 108330995 A CN108330995 A CN 108330995A
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 112
- 239000010959 steel Substances 0.000 title claims abstract description 112
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 56
- 238000010276 construction Methods 0.000 title claims abstract description 51
- 238000000034 method Methods 0.000 claims abstract description 19
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 239000002985 plastic film Substances 0.000 claims abstract description 13
- 229920006255 plastic film Polymers 0.000 claims abstract description 13
- 230000000694 effects Effects 0.000 claims abstract description 6
- 238000005086 pumping Methods 0.000 claims abstract description 4
- 238000013461 design Methods 0.000 claims description 15
- 230000008901 benefit Effects 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 11
- 238000009434 installation Methods 0.000 claims description 9
- 239000000758 substrate Substances 0.000 claims description 9
- 238000012545 processing Methods 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000004576 sand Substances 0.000 claims description 5
- 235000014121 butter Nutrition 0.000 claims description 3
- 239000011248 coating agent Substances 0.000 claims description 3
- 238000000576 coating method Methods 0.000 claims description 3
- 238000007596 consolidation process Methods 0.000 claims description 3
- 238000003780 insertion Methods 0.000 claims description 3
- 230000037431 insertion Effects 0.000 claims description 3
- 238000005259 measurement Methods 0.000 claims description 3
- 238000012544 monitoring process Methods 0.000 claims description 3
- 238000012856 packing Methods 0.000 claims description 3
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000004062 sedimentation Methods 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 239000002689 soil Substances 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 6
- 239000010802 sludge Substances 0.000 abstract 5
- 238000005516 engineering process Methods 0.000 description 6
- 230000004888 barrier function Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000003892 spreading Methods 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 230000007306 turnover Effects 0.000 description 1
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
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- 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)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses a steel sheet pile cofferdam construction method under a deep water thick silt layer environment, which comprises the following steps: during construction, four guide steel pipe piles are inserted and driven on the inner side of a support ring beam, a first layer of inner supports are arranged on the guide steel pipe piles and also serve as steel plate pile guide frames, long and short steel plate piles are alternately inserted and driven and are welded on the first layer of inner support ring beam one by one, and the inner supports are used for assisting the steel pipe piles and the long steel plate piles so as to improve the embedding stability of the cofferdam in silt geology; after the steel sheet pile cofferdam is closed, inserting and driving steel pipe pile auxiliary supports around the outer side of the cofferdam; the combined type sludge suction pump and the telescopic arm grab bucket are utilized to suck sludge and desilt the sludge to a bottom sealing elevation, and underwater bottom sealing concrete is poured, so that the problem that the efficiency of the traditional air compressor reverse circulation sludge suction process is low under the geological condition of a thick sludge layer is solved; and (3) hanging a plastic film filling strip at the position of a locking opening gap on the outer side of the steel sheet pile cofferdam from top to bottom, and pumping water in the cofferdam to generate a pressure difference film to be filled into the locking opening gap along with water flow so as to achieve a water stopping effect.
Description
Technical field
It is especially that a kind of deep water thick mud layer environment lower steel plate pile cofferdam is applied the present invention relates to a kind of cofferdam construction method
Work method.
Background technology
On-water bridge is increasing now, to ensure that navigation safety, bridge foundation of more and more paddling are embedded in riverbed
Under face.It for geological condition of the Riverbed based on thick silt layer, is influenced by cofferdam building-in depth, overlength steel sheet pile is applied
Work is difficult, is often used steel lifted trunk, fore shaft steel-pipe pile form cofferdam to solve the problems, such as the cofferdam stabilization under this particular surroundings, but steel
Hanging box and opening locked steel tube pilecofferdam construction cost height, complex procedures.The present invention provides a kind of thick mud layer deepwater foundation steel herein
Sheet-pile cofferdam construction method.It was verified that this kind of construction technology is economic and practical, safe and reliable.
Invention content
Therefore, in order to solve above-mentioned deficiency, the present invention provides a kind of steel sheet pile cofferdam construction method, solves thick silt herein
Deepwater foundation construction technical barrier under mud layer geological conditions；First inserting piling four is oriented to steel-pipe piles on the inside of supporting ring beam when construction,
First layer inner support is placed on being oriented to steel-pipe pile and also serves as steel sheet pile guide housing, and length shaped steel plate pile replaces inserting piling and one by one patch weldering
On first layer inner support collar tie beam, assist steel-pipe pile and long shaped steel plate pile to improve cofferdam in mud geology by inner support
Build-in stability；After steel sheet-pile cofferdam closure, the surrounding inserting piling steel-pipe pile Auxiliary support again on the outside of cofferdam；Mud is inhaled using combined type
Pump and telescopic arm grab bucket inhale desilting to back cover bottom elevation, underwater bottom concrete are poured, to overcome traditional air compressor machine reacting cycle
Inhale bricklayer's's skill low problem of efficiency under thick mud layer geological conditions；It is hanged from top to bottom at fore shaft gap on the outside of the steel sheet-pile cofferdam
Filling plastic film strip is hung, the generation pressure difference film that draws water in cofferdam is filled in flow at fore shaft gap, to reach water-stagnating effect.
The invention is realized in this way a kind of deep water thick mud layer environment lower steel plate pile cofferdam construction method is constructed, it is special
Sign is, implements as follows：
（One）It is oriented to steel-pipe pile inserting piling：According to cofferdam design size, setting-out goes out to be oriented to the position of steel-pipe pile, is passed through using crawler crane
Electric vibrating hammer clamping steel-pipe pile carries out inserting piling；Steel-pipe pile must require to squeeze into basic certain depth according to calculating, to ensure that it is steady
Solidity.It is oriented to steel-pipe pile to be arranged on the inside of inner support collar tie beam, is arranged 4 altogether, when inserting piling should ensure that its plan-position, unsuitable deviation
It is excessive, repetition measurement is carried out after inserting piling.
（Two）Top layer inner support collar tie beam is installed：According to design altitude, welding first layer inner support is assembled on being oriented to steel-pipe pile
Bracket goes out top layer inner support collar tie beam surrounding sideline in the setting-out of bracket top surface, and on-site consolidation welds collar tie beam, the single bar on four side of collar tie beam
Part makes in processing space.With guiding steel-pipe pile firm welding after the completion of collar tie beam is assembled, the frame of steel sheet pile inserting piling support is formed.
（Three）Steel sheet pile inserting piling
（1）Guide housing is set before steel sheet pile inserting piling on the outside of top layer collar tie beam, and mobile limiting card is installed, to ensure steel sheet pile inserting piling
Accurate positioning.For reduce frictional resistance with reinforce sealing, in inserting piling at fore shaft coating butter.Length shaped steel plate pile is alternately inserted
It beats, uses long shaped steel plate pile close to collar tie beam side, patch is welded on collar tie beam inserting piling afterwards in place.
（2）During inserting piling, reinforce measuring, finds to tilt, adjust in time.One can be inserted when beginning makes a call to one, it will be each
Piece steel sheet pile gets to design position, finally remains a part, first to insert and beat afterwards, if closing up wrong, with jack or tackle pulley to drawing, makes
Close up.After closing up, then by root get to projected depth.
（3）After steel sheet pile closure, 8 ultralong steel tube stake Auxiliary supports of surrounding inserting piling, steel pipe pile bottom insertion are steady on the outside
Gu base.
（Four）It inhales mud and pours back cover
（1）Since cofferdam is in deep water thick mud layer, is grabbed bucket with telescopic arm using combined type dredge pump and combine progress substrate clear
Silt is handled.After the completion of inhaling mud, diver is sent to carry out water jetting at high pressure cleaning to steel sheet pile and casing wall.If being stream modeling after substrate cleaning
Property soft layer, cope with the back-up sand of substrate superabsorbent or packing sedimentation by throwing stones, carry out bottom concrete after processing again and pour.
（2）Bottom concrete is poured using underwater vertical tremie method, and from cofferdam both sides to centre, upstream gradually downstream pushes away
Into.Elevation of top surface is constantly measured when filling concrete, and benefit side of uniformly kicking off is should be noted that when apart from design altitude 50cm, it is final to push up
It reserves 20cm and is used as leveling layer and gutter construction in face.During pouring underwater bottom concrete, inside and outside head difference to be made to protect
It holds within the scope of certain, keeps certain pressure, so that the concrete of non-final set is not deformed because pressure is big, to shadow
Ring the quality and back cover water-stagnating effect of bottom concrete.
（Five）Fore shaft leak stopping sealing：Bottom concrete carries out patching during conserving to cofferdam.Send diver in cofferdam
Fore shaft gap hangs filling plastic film strip from top to bottom on the outside of steel sheet pile, and plastic film strip lower end is fixed using reinforcing bar, cofferdam
Reach sealing purpose since external and internal pressure difference plastic film enters fore shaft gap with flow after drawing water.
（Six）The remaining support of installation of drawing water：Bottom concrete starts to draw water after reaching design strength.It draws water to every layer of inner support
The positions 1m below collar tie beam absolute altitude stop pumping, and welding collar tie beam supports bracket, installs this layer of collar tie beam and internal overarm support.It should ensure that when installation
Collar tie beam is fitted closely with steel sheet pile, and there are steel plate welding filling support pad is used at gap.Reinforce in pump process to cofferdam entirety
The monitoring of deformation, collar tie beam and support are drawn water after installing to back cover top surface.
（Seven）Foundation construction and cofferdam demolition：Dredging is carried out to back cover top surface after drawing water, pile crown is cut, pours levelling
Layer concrete, construction bearing platform and pier shaft remove cofferdam after infrastructure water level elevation more than expected.Dismounting sequence by lower and
On：With the progress of construction, into cofferdam, the inner support position extremely to be removed of recharge water, removes this layer of inner support.Continue later
Recharge water removes inner support successively.After removing last layer of inner support, so that inside and outside hydraulic balance, sheet pile extruding force is disappeared, use liquid
Pressing tongs cooperation vibration hammer first shakes a few minutes, is repeated several times and pulls up inserting piling and pull out steel sheet pile.
The invention has the advantages that：Setting is oriented to steel-pipe pile supporting ring beam and also serves as guide housing, positions inserting piling steel sheet pile, can
Turnover steel pile casting is cut off in advance to use；Replace inserting piling using length shaped steel plate pile, the setting auxiliary steel-pipe pile support on the outside of cofferdam,
Cofferdam overall stability can be improved, reduce steel sheet pile dosage；Fore shaft clogs plastic film on the outside of steel sheet pile, utilizes pressure difference of drawing water
Bring film into fore shaft gap sealing, method is simple to operation；Suction mud is carried out using telescopic arm grab bucket, combined type dredge pump, compared with
Tradition is efficient using air compressor reacting cycle suction mud.
Combining undertaken the construction of Jiangxi Province all nine（Duchang is to Jiujiang）Two bridge C7 of high speed project Poyang Lake marks secondary orifices deep water base
Plinth is constructed, and according to the hydrology address situation of poyang lake water, by analysing and comparing, final determine assists collar tie beam using supporting steel pipe
Installation, the grab bucket of length steel sheet pile alternate combinations inserting piling, film negative pressure sealing, telescopic arm inhale the measures such as mud with combined type dredge pump,
The construction environment for overcoming deep water thick mud layer solves thick mud layer deepwater foundation construction technical barrier.It was verified that this kind
Construction technology is economic and practical, safe and reliable.
Description of the drawings
Fig. 1 steel sheet pile cofferdam construction flows；
The cofferdam Fig. 2 floor plan；
Fig. 3 top layer collar tie beam assembly floor map；
Fig. 4 guide housings and limiting card schematic diagram；
The cofferdam Fig. 5 film sealing schematic diagram.
Specific implementation mode
Below in conjunction with attached drawing 1- Fig. 5, the present invention is described in detail, technical solution in the embodiment of the present invention into
Row clearly and completely describes, it is clear that described embodiments are only a part of the embodiments of the present invention, rather than whole realities
Apply example.Based on the embodiments of the present invention, those of ordinary skill in the art are obtained without making creative work
Every other embodiment, shall fall within the protection scope of the present invention.
The present invention provides a kind of deep water thick mud layer environment lower steel plate pile cofferdam construction method herein by improving, and solves
Thick mud layer deepwater foundation construction technical barrier；It was verified that this kind of construction technology is economic and practical, safe and reliable.
Method characteristic is as follows：
（1）Duration is adaptable.It is identical as conventional steel sheet pile cofferdam construction, it is only necessary to live spreading part steel sheet pile；It can be according to work
Phase requires, and steel sheet pile is adjusted flexibly into number to meet the requirements, need not process cofferdam material in advance.
（2）Remarkable in economical benefits.Steel sheet pile can be rented outside, need not disposably put into a large amount of raw material and be made for cofferdam,
Single cofferdam steel using amount is few, repeatable to be used in turn, and it is low that peace tears expense open.
（3）Structural stability is good.Using the installation of supporting steel pipe auxiliary collar tie beam, the shape of length steel sheet pile alternate combinations inserting piling
Formula effectively overcomes the build-in stability in cofferdam under thick silt layer geological conditions.
（4）Construction convenient and efficient.Cofferdam peace is torn open to be assisted without large lifting equipment, using film negative pressure sealing, telescopic arm
Grab bucket inhales bricklayer's's skill with combined type dredge pump, and sealing is simple, and it is efficient to inhale mud.
Technological principle：This cofferdam structure is made of Larsen steel sheet pile, inner support system.When construction first on the inside of supporting ring beam
Four guiding steel-pipe piles of inserting piling, placement first layer inner support also serves as steel sheet pile guide housing, length shape steel plate on being oriented to steel-pipe pile
Stake replaces inserting piling and patch is welded on first layer inner support collar tie beam one by one, assists steel-pipe pile and long shaped steel plate pile to carry by inner support
Build-in stability of the high cofferdam in mud geology；After steel sheet-pile cofferdam closure, grabbed bucket using combined type dredge pump and telescopic arm
Desilting is inhaled to back cover bottom elevation, pours underwater bottom concrete, is become silted up in thickness with overcoming traditional air compressor machine reacting cycle to inhale bricklayer's's skill
The low problem of efficiency under mud layer geological conditions；The suspension filling plastic film from top to bottom at fore shaft gap on the outside of the steel sheet-pile cofferdam
Item, drawing water in cofferdam generates pressure difference film and is filled at fore shaft gap with flow, to reach water-stagnating effect.
Construction technology process and key points for operation：Construction technology process is as shown in Figure 1；
（One）It is oriented to steel-pipe pile inserting piling：According to cofferdam design size, setting-out goes out to be oriented to the position of steel-pipe pile, is passed through using crawler crane
Electric vibrating hammer clamping steel-pipe pile carries out inserting piling；Steel-pipe pile must require to squeeze into basic certain depth according to calculating, to ensure that it is steady
Solidity.It is oriented to steel-pipe pile to be arranged on the inside of inner support collar tie beam, 4 is arranged altogether, as shown in Fig. 2, should ensure that its plane position when inserting piling
It sets, unsuitable deviation is excessive, and repetition measurement is carried out after inserting piling.
（Two）Top layer inner support collar tie beam is installed：According to design altitude, welding first layer inner support is assembled on being oriented to steel-pipe pile
Bracket, as shown in figure 3, going out top layer inner support collar tie beam surrounding sideline in the setting-out of bracket top surface, on-site consolidation welds collar tie beam, collar tie beam four
The single rod piece on side makes in processing space.With guiding steel-pipe pile firm welding after the completion of collar tie beam is assembled, steel sheet pile inserting piling branch is formed
The frame of support.
（Three）Steel sheet pile inserting piling
（1）Guide housing is set before steel sheet pile inserting piling on the outside of top layer collar tie beam, and mobile limiting card is installed, as shown in figure 4, to ensure
Steel sheet pile inserting piling accurate positioning.For reduce frictional resistance with reinforce sealing, in inserting piling at fore shaft coating butter.Length shaped steel
Sheet pile replaces inserting piling, uses long shaped steel plate pile close to collar tie beam side, patch is welded on collar tie beam inserting piling afterwards in place.
（2）During inserting piling, reinforce measuring, finds to tilt, adjust in time.One can be inserted when beginning makes a call to one, it will be each
Piece steel sheet pile gets to design position, finally remains a part, first to insert and beat afterwards, if closing up wrong, with jack or tackle pulley to drawing, makes
Close up.After closing up, then by root get to projected depth.
（3）After steel sheet pile closure, 8 ultralong steel tube stake Auxiliary supports of surrounding inserting piling, steel pipe pile bottom insertion are steady on the outside
Gu base, as shown in Figure 2.
（Four）It inhales mud and pours back cover
（1）Since cofferdam is in deep water thick mud layer, is grabbed bucket with telescopic arm using combined type dredge pump and combine progress substrate clear
Silt is handled.After the completion of inhaling mud, diver is sent to carry out water jetting at high pressure cleaning to steel sheet pile and casing wall.If being stream modeling after substrate cleaning
Property soft layer, cope with the back-up sand of substrate superabsorbent or packing sedimentation by throwing stones, carry out bottom concrete after processing again and pour.
（2）Bottom concrete is poured using underwater vertical tremie method, and from cofferdam both sides to centre, upstream gradually downstream pushes away
Into.Elevation of top surface is constantly measured when filling concrete, and benefit side of uniformly kicking off is should be noted that when apart from design altitude 50cm, it is final to push up
It reserves 20cm and is used as leveling layer and gutter construction in face.During pouring underwater bottom concrete, inside and outside head difference to be made to protect
It holds within the scope of certain, keeps certain pressure, so that the concrete of non-final set is not deformed because pressure is big, to shadow
Ring the quality and back cover water-stagnating effect of bottom concrete.
（Five）Fore shaft leak stopping sealing：Bottom concrete carries out patching during conserving to cofferdam.Send diver in cofferdam
Fore shaft gap hangs filling plastic film strip from top to bottom on the outside of steel sheet pile, as shown in figure 5, plastic film strip lower end uses reinforcing bar
Fixed, cofferdam since external and internal pressure difference plastic film enters fore shaft gap with flow reaches sealing purpose after drawing water.
（Six）The remaining support of installation of drawing water：Bottom concrete starts to draw water after reaching design strength.It draws water to every layer of inner support
The positions 1m below collar tie beam absolute altitude stop pumping, and welding collar tie beam supports bracket, installs this layer of collar tie beam and internal overarm support.It should ensure that when installation
Collar tie beam is fitted closely with steel sheet pile, and there are steel plate welding filling support pad is used at gap.Reinforce in pump process to cofferdam entirety
The monitoring of deformation, collar tie beam and support are drawn water after installing to back cover top surface.
（Seven）Foundation construction and cofferdam demolition：Dredging is carried out to back cover top surface after drawing water, pile crown is cut, pours levelling
Layer concrete, construction bearing platform and pier shaft remove cofferdam after infrastructure water level elevation more than expected.Dismounting sequence by lower and
On：With the progress of construction, into cofferdam, the inner support position extremely to be removed of recharge water, removes this layer of inner support.Continue later
Recharge water removes inner support successively.After removing last layer of inner support, so that inside and outside hydraulic balance, sheet pile extruding force is disappeared, use liquid
Pressing tongs cooperation vibration hammer first shakes a few minutes, is repeated several times and pulls up inserting piling and pull out steel sheet pile.
Performance analysis is presented as：
（1）Economic benefit
By taking two bridge C7 of Poyang Lake marks 38 secondary orifices deepwater foundation constructions as an example, opening locked steel tube pilecofferdam is used to construct in the original plan, after
It is optimized to use this method, 16 sets of steel sheet-pile cofferdams, 4 months construction periods, more former opening locked steel tube pilecofferdam scheme warp are put into altogether
Help Efficiency Comparison：Using the single cofferdam weight 143t of steel sheet-pile cofferdam, 16 sets of steel sheet pile 2288t, freight charges and lease expenses are leased altogether
425.6 ten thousand yuan；Steel sheet pile cofferdam construction takes 340 yuan/t, 38 184.8 ten thousand yuan of cofferdam construction expenses；Steel sheet pile cofferdam construction is total
Lease 55t crawler cranes 8, lease in 4 months and into 150.4 ten thousand yuan of fee for showing up.If using the opening locked steel tube pilecofferdam of identical tricks,
Single cofferdam weighs about 200t, and 16 sets of processing needs steel 3200t altogether, and based on this project amortization 30%, processing and manufacturing expense needs 6,560,000
Member；800 yuan/t of opening locked steel tube pilecofferdam operating expenses, 38 6,080,000 yuan of cofferdam construction expenses；Opening locked steel tube pilecofferdam must be rented
The construction of 8 85t crawler cranes, lease in 4 months and into 220.8 ten thousand yuan of fee for showing up.
This example occurs expense using steel sheet-pile cofferdam and adds up to 760.8 ten thousand yuan, and opening locked steel tube pilecofferdam adds up to expense 1484.8
Wan Yuan generates 7,240,000 yuan of economic benefit.
（2）Social benefit：
The method is used in two bridge C7 mark secondary orifices underwater foundation constructions of Poyang Lake, 38 depths have been successfully completed 4 months dry seasons
Water foundation construction, completing as scheduled for bridge, it is critical to have served, and produces preferable social benefit, worth similar engineering is borrowed
Mirror is promoted.
（3）Technical benefits
The example method uses steel sheet-pile cofferdam, assists collar tie beam installation, length steel sheet pile alternate combinations to insert by the way that supporting steel pipe is arranged
Beat, the grab bucket of film negative pressure sealing, telescopic arm inhales the techniques such as mud with combined type dredge pump, overcome the construction ring of deep water thick mud layer
Border proposes new thinking so that steel sheet-pile cofferdam adaptability is more extensive for the type deepwater foundation construction.
Application example：In December, 2016, in Jiangxi Province, two bridge C7 of nine high speed Poyang Lakes marked secondary orifices to during in April, 2017
This method is applied successfully in underwater foundation construction.
（1）Project profile：Two bridge C7 mark secondary orifices underwater foundation totally 38 of Poyang Lake, cushion cap planar dimension is 8m × 8m, if
It counts water level and reaches 10.5m with back cover concrete bottom surface head difference maximum, pier position geological condition complex geologic conditions are from top to bottom deep mud
Layer, fine sand（Coarse sand）Layer, gravel layer, shale layer, the most thick 13.7m of mud.
（2）Condition of construction and evaluation of result：By scheme optimization, replace inserting piling using two kinds of length steel sheet piles of 18m and 24m
Form cofferdam, inhale the techniques such as mud with combined type dredge pump using film negative pressure sealing, telescopic arm grab bucket, 4 months dry seasons at
Work(completes 38 deep water foundation cofferdam, effectively overcomes the unfavorable conditions of deep water thick mud layer, economic benefit and social benefit
Significantly, cost-effective 7,240,000 yuan of more former opening locked steel tube pilecofferdam scheme build up for bridge and provide a favorable guarantee as scheduled.
The foregoing description of the disclosed embodiments enables those skilled in the art to implement or use the present invention.
Various modifications to these embodiments will be apparent to those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, of the invention
It is not intended to be limited to the embodiments shown herein, and is to fit to and the principles and novel features disclosed herein phase one
The widest range caused.
Claims (1)
1. a kind of deep water thick mud layer environment lower steel plate pile cofferdam construction method, it is characterised in that：Implement in accordance with the following steps；
（One）It is oriented to steel-pipe pile inserting piling：According to cofferdam design size, setting-out goes out to be oriented to the position of steel-pipe pile, is passed through using crawler crane
Electric vibrating hammer clamping steel-pipe pile carries out inserting piling；Steel-pipe pile must require to squeeze into basic certain depth according to calculating, to ensure that it is steady
Solidity；It is oriented to steel-pipe pile to be arranged on the inside of inner support collar tie beam, is arranged 4 altogether, when inserting piling should ensure that its plan-position, unsuitable deviation
It is excessive, repetition measurement is carried out after inserting piling；
（Two）Top layer inner support collar tie beam is installed：First layer inner support assembly ox is welded on being oriented to steel-pipe pile according to design altitude
Leg goes out top layer inner support collar tie beam surrounding sideline in the setting-out of bracket top surface, and on-site consolidation welds collar tie beam, the single rod piece on four side of collar tie beam
It is made in processing space；With guiding steel-pipe pile firm welding after the completion of collar tie beam is assembled, the frame of steel sheet pile inserting piling support is formed；
（Three）Steel sheet pile inserting piling：
（1）Guide housing is set before steel sheet pile inserting piling on the outside of top layer collar tie beam, and mobile limiting card is installed, to ensure steel sheet pile inserting piling
Accurate positioning；For reduce frictional resistance with reinforce sealing, in inserting piling at fore shaft coating butter；Length shaped steel plate pile is alternately inserted
It beats, uses long shaped steel plate pile close to collar tie beam side, patch is welded on collar tie beam inserting piling afterwards in place；
（2）During inserting piling, reinforce measuring, finds to tilt, adjust in time；One can be inserted when beginning makes a call to one, it will be per a piece of steel
Sheet pile gets to design position, finally remains a part, first to insert and beat afterwards, if closing up wrong, with jack or tackle pulley to drawing, is allowed to close
Hold together；After closing up, then by root get to projected depth；
（3）After steel sheet pile closure, 8 ultralong steel tube stake Auxiliary supports of surrounding inserting piling, steel pipe pile bottom insertion on the outside consolidates base
Layer；
（Four）It inhales mud and pours back cover：
（1）Since cofferdam is in deep water thick mud layer, is grabbed bucket with telescopic arm using combined type dredge pump and combine progress substrate clear
Silt is handled；After the completion of inhaling mud, diver is sent to carry out water jetting at high pressure cleaning to steel sheet pile and casing wall；
If being stream plasticity soft layer after substrate cleaning, the back-up sand of substrate superabsorbent or packing sedimentation by throwing stones are coped with, carries out back cover after processing again
Concreting；
（2）Bottom concrete is poured using underwater vertical tremie method, and from cofferdam both sides to centre, upstream gradually downstream promotes；
Elevation of top surface is constantly measured when filling concrete, and benefit side of uniformly kicking off, final top surface are should be noted that when apart from design altitude 50cm
Reserved 20cm is used as leveling layer and gutter construction；During pouring underwater bottom concrete, inside and outside head difference to be made to keep
Within the scope of certain, certain pressure is kept, so that the concrete of non-final set is not deformed because pressure is big, to influence
The quality and back cover water-stagnating effect of bottom concrete；
（Five）Fore shaft leak stopping sealing：Bottom concrete carries out patching during conserving to cofferdam；Send diver in cofferdam steel plate
Stake outside fore shaft gap hangs filling plastic film strip from top to bottom, and plastic film strip lower end is fixed using reinforcing bar, and cofferdam is drawn water
Reach sealing purpose since external and internal pressure difference plastic film enters fore shaft gap with flow afterwards；
（Six）The remaining support of installation of drawing water：Bottom concrete starts to draw water after reaching design strength；
Draw water to the positions 1m below every layer of inner support collar tie beam absolute altitude and stop pumping, welding collar tie beam support bracket, install this layer of collar tie beam and
Internal overarm support；It should ensure that collar tie beam is fitted closely with steel sheet pile when installation, there are steel plate welding filling support pad is used at gap；It drew water
Reinforce the monitoring to cofferdam overall deformation situation in journey, collar tie beam and support are drawn water after installing to back cover top surface；
（Seven）Foundation construction and cofferdam demolition：Dredging is carried out to back cover top surface after drawing water, cuts pile crown, it is mixed to pour screed-coat
Solidifying soil, construction bearing platform and pier shaft remove cofferdam after infrastructure water level elevation more than expected；Dismounting sequence is from bottom to top：With
The progress of construction, the inner support position extremely to be removed of recharge water, removes this layer of inner support into cofferdam；Continue recharge later
Water removes inner support successively；
After removing last layer of inner support, inside and outside hydraulic balance, sheet pile extruding force is made to disappear, is first shaken with hydraulic tongs cooperation vibration hammer
Dynamic a few minutes are repeated several times and pull up inserting piling and pull out steel sheet pile.
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Cited By (13)
| 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 |
| CN111139849A (en) * | 2020-01-03 | 2020-05-12 | 浙江大学城市学院 | Construction method of deep-buried underwater bearing platform steel sheet pile cofferdam |
| CN111535345A (en) * | 2020-05-19 | 2020-08-14 | 张成瑞 | Rapid leakage-stopping method and structure of underwater steel sheet pile cofferdam |
| CN112609721A (en) * | 2020-12-07 | 2021-04-06 | 中国化学工程第六建设有限公司 | Drainage method for steel sheet pile combined large-scale sewage pump |
| CN113073667A (en) * | 2021-04-06 | 2021-07-06 | 北京华昊水利水电工程有限责任公司 | Assembled cofferdam structure and construction method |
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| CN114250797A (en) * | 2021-12-29 | 2022-03-29 | 中铁十九局集团有限公司 | Underwater concrete bottom sealing construction method for steel sheet pile cofferdam in deep water area |
| CN114457832A (en) * | 2022-03-23 | 2022-05-10 | 中铁四局集团有限公司 | Simple water stopping method for Larsen steel sheet pile cofferdam |
| 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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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105040715A (en) * | 2015-07-29 | 2015-11-11 | 黑龙江省龙建路桥第三工程有限公司 | Method for building bridge construction cofferdam through steel sheet piles |
| CN105133627A (en) * | 2015-07-28 | 2015-12-09 | 安徽省新路建设工程集团有限责任公司 | Construction method for single-wall steel sheet pile cofferdam in running water state |
| CN106320351A (en) * | 2016-08-25 | 2017-01-11 | 中铁四局集团有限公司 | Small-spacing long and large underwater steel sheet pile cofferdam construction method |
| CN107313435A (en) * | 2017-07-05 | 2017-11-03 | 中铁十局集团第五工程有限公司 | Deep Water Ultra-long steel sheet pile cofferdam construction method |
-
2018
- 2018-01-23 CN CN201810062753.3A patent/CN108330995A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105133627A (en) * | 2015-07-28 | 2015-12-09 | 安徽省新路建设工程集团有限责任公司 | Construction method for single-wall steel sheet pile cofferdam in running water state |
| CN105040715A (en) * | 2015-07-29 | 2015-11-11 | 黑龙江省龙建路桥第三工程有限公司 | Method for building bridge construction cofferdam through steel sheet piles |
| CN106320351A (en) * | 2016-08-25 | 2017-01-11 | 中铁四局集团有限公司 | Small-spacing long and large underwater steel sheet pile cofferdam construction method |
| CN107313435A (en) * | 2017-07-05 | 2017-11-03 | 中铁十局集团第五工程有限公司 | Deep Water Ultra-long steel sheet pile cofferdam construction method |
Non-Patent Citations (1)
| Title |
|---|
| 于志兵等: "锁口钢管桩围堰逆作法施工技术", 《公路》 * |
Cited By (15)
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| 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 |
| CN111139849A (en) * | 2020-01-03 | 2020-05-12 | 浙江大学城市学院 | Construction method of deep-buried underwater bearing platform steel sheet pile cofferdam |
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| CN114250797A (en) * | 2021-12-29 | 2022-03-29 | 中铁十九局集团有限公司 | Underwater concrete bottom sealing construction method for steel sheet pile cofferdam in deep water area |
| CN114457832A (en) * | 2022-03-23 | 2022-05-10 | 中铁四局集团有限公司 | Simple water stopping method for Larsen steel sheet pile cofferdam |
| 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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Application publication date: 20180727 |