CN108222040A - Steel sheet pile cofferdam construction method - Google Patents
Steel sheet pile cofferdam construction method Download PDFInfo
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- CN108222040A CN108222040A CN201810013802.4A CN201810013802A CN108222040A CN 108222040 A CN108222040 A CN 108222040A CN 201810013802 A CN201810013802 A CN 201810013802A CN 108222040 A CN108222040 A CN 108222040A
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- sheet pile
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- cofferdam
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 269
- 239000010959 steel Substances 0.000 title claims abstract description 269
- 238000010276 construction Methods 0.000 title claims abstract description 92
- 238000005553 drilling Methods 0.000 claims abstract description 56
- 239000011435 rock Substances 0.000 claims abstract description 48
- 238000009434 installation Methods 0.000 claims abstract description 17
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 7
- 238000013459 approach Methods 0.000 claims abstract description 4
- 238000013480 data collection Methods 0.000 claims abstract description 3
- 239000010410 layer Substances 0.000 claims description 31
- 239000004576 sand Substances 0.000 claims description 18
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 13
- 239000004568 cement Substances 0.000 claims description 12
- 238000007569 slipcasting Methods 0.000 claims description 10
- 230000008569 process Effects 0.000 claims description 9
- 239000000945 filler Substances 0.000 claims description 8
- 238000004140 cleaning Methods 0.000 claims description 6
- 239000002344 surface layer Substances 0.000 claims description 5
- 238000012937 correction Methods 0.000 claims description 3
- 230000003068 static effect Effects 0.000 claims description 3
- 230000008439 repair process Effects 0.000 claims description 2
- 229920002472 Starch Polymers 0.000 claims 1
- 238000000605 extraction Methods 0.000 claims 1
- 239000008107 starch Substances 0.000 claims 1
- 235000019698 starch Nutrition 0.000 claims 1
- 239000000284 extract Substances 0.000 abstract description 4
- 239000000243 solution Substances 0.000 description 39
- 230000000694 effects Effects 0.000 description 8
- 238000007789 sealing Methods 0.000 description 8
- 239000002689 soil Substances 0.000 description 5
- 238000011161 development Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 238000007596 consolidation process Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000010009 beating Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 239000004746 geotextile Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000005086 pumping Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
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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
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D7/00—Methods or apparatus for placing sheet pile bulkheads, piles, mouldpipes, or other moulds
- E02D7/20—Placing by pressure or pulling power
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2300/00—Materials
- E02D2300/0026—Metals
- E02D2300/0029—Steel; Iron
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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)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The present invention provides a kind of steel sheet pile cofferdam construction method,Including data collection step,Cleanup step,Static-pressure pile planting machine installation steps,Steel sheet pile construction step,Cofferdam fold step and support system installation steps,Steel sheet pile construction step includes a plurality of steel sheet pile is pressed into riverbed one by one from upstream end downstream end using static-pressure pile planting machine along region to be onstructed,When steel sheet pile approaches riverbed rock stratum,Start auger,Auger carries out multiple drilling according to the single amount of feeding of setting to rock stratum,Drilling is included in after spiral drilling completes and form drilling auger each time,It reversely extracts auger and steel sheet pile is pressed into foot of hole,After steel sheet pile is pressed into foot of hole,Auger carries out the total feed amount that drilling next time is equal to setting to the sum of the multiple single amount of feeding of auger,Steel sheet-pile cofferdam is closed up in the downstream in region to be onstructed.The steel sheet pile cofferdam construction method have the advantages that noise it is small, it is safe and available for have competent bed riverbed.
Description
Technical field
The present invention relates to cofferdam construction technical field, specifically, being to be related to a kind of steel sheet pile cofferdam construction method.
Background technology
At present, domestic deep water pier steel cofferdam is constructed beats steel sheet pile two frequently with Double-Wall Steel Boxed Cofferdam and traditional vibration
Kind mode.Wherein, Double-Wall Steel Boxed Cofferdam is suitable for the delay riverbed that cushion cap insertion rock stratum is shallow, coating is relatively thin, underwater topography is flat；
And it vibrates and beats steel sheet pile then suitable for riverbeds such as flow velocity larger sandy soil, cohesive soil, gravelly soil and decomposed rocks.
But above two steel cofferdam form of construction work is required to after steel cofferdam construction is completed, to the bottom of steel cofferdam into
Back cover under row concrete water, to ensure the leakproofness of steel cofferdam.In addition, also existed using the form of construction work that steel sheet pile is beaten in vibration
The shortcomings of noise is big, pollution is big, periphery of especially constructing can seriously affect the daily life of neighbouring resident there are during residential block.
Furthermore Double-Wall Steel Boxed Cofferdam and vibration beat two kinds of steel cofferdam constructions of steel sheet pile and are not suitable for competent bed construction, especially also
Containing solution cavity development location, and above two steel cofferdam construction there are difficulty of construction it is big the shortcomings that, especially with vibration
Can also rock stratum be generated larger disturbance by beating the form of construction work of steel sheet pile.
Invention content
To solve the above-mentioned problems, a kind of noise of present invention offer is small, pollution is low, safe and hard available for having
The steel sheet pile cofferdam construction method in rock stratum riverbed.
In order to realize the main object of the present invention, the present invention provides a kind of steel sheet pile cofferdam construction method, wherein, including money
Expect acquisition step, geologic information acquisition is carried out during drilled pile construction；Cleanup step, to the area to be onstructed of steel sheet-pile cofferdam
Domain is cleared up；Static-pressure pile planting machine installation steps, will be quiet in the upstream end in region to be onstructed using vibration hammer inserting piling counter-force stake group
Pile-grafting machine is pressed to be mounted in counter-force stake group；Steel sheet pile construction step uses static-pressure pile planting machine by a plurality of steel plate along region to be onstructed
Stake is pressed into riverbed one by one from upstream end to the downstream in region to be onstructed, and the press-in of every steel sheet pile includes：When steel sheet pile is pressed into
During the layer of sand on riverbed surface layer, the auger of static-pressure pile planting machine remains turned-off or keeps slow rotary state, when steel sheet pile approaches river
During the rock stratum of bed, start auger, auger carries out rock stratum multiple drilling according to the single amount of feeding of setting, auger it is every
One time drilling includes：After spiral drilling is completed and forms drilling, auger is reversely extracted, and steel sheet pile is pressed into drilling
Bottom, and after steel sheet pile is pressed into the bottom of drilling, auger carries out drilling next time until the multiple single of auger
The sum of amount of feeding is equal to the total feed amount of setting；Cofferdam fold step before steel sheet-pile cofferdam closes up, pulls out counter-force stake group, root
A plurality of steel sheet pile is pressed into again on the position of counter-force stake group according to steel sheet pile construction step, and completes closing up for steel sheet-pile cofferdam,
And steel sheet-pile cofferdam is closed up in the downstream in region to be onstructed；Support system installation steps, after steel sheet-pile cofferdam closes up,
Purlin layer and inner supporting structure are successively installed in steel sheet-pile cofferdam from more than the water surface in riverbed to riverbed.
Therefore steel sheet pile cofferdam construction method provided by the invention is applicable to underwater dumped rockfill bank protection, riverbed erratic boulder
And the riverbed of competent bed, in the construction process, first using jackstone, the erratic boulder on static-pressure pile planting machine cleaning riverbed at stake position,
To penetrate through barrier, generation position deviates during so as to which steel sheet pile being avoided to be pressed into.Secondly, static-pressure pile planting machine can be realized to riverbed
Competent bed carries out drilling, in the generation that can effectively inhibit pressure napiform root, also, can while auger is produced
Steel sheet pile is pressed into rock stratum in a manner that the auger of landfill extracts gap, moreover, can lead to while steel sheet pile is pressed into
It crosses auger digging effect and mitigates resistance suffered during steel sheet pile press-in, and then competent bed is overcome to be difficult to inserting piling steel sheet pile
Problem.In addition, the destruction of rock stratum can be made to be limited in minimum range by way of auger drilling, soil discharge quantity is being reduced
While, the integrality of steel sheet pile periphery rock stratum after suffered resistance and guarantee are pressed into when can reduce steel sheet pile press-in,
So that steel sheet pile has stronger holding power, and it ensure that the verticality and tight ness rating of steel sheet pile, meanwhile, pass through the present invention
The steel sheet-pile cofferdam constructed out of steel sheet pile cofferdam construction method can realize and can meet steel sheet pile without concrete sealing bottom
The effect of cofferdam waterproof avoids the troublesome operation for needing after traditional cofferdam construction to carry out concrete sealing bottom, has that noise is small, pollution
The advantages of low, safe and environmentally friendly.
One Preferable scheme is that, runner, the first end difference of runner are provided in the middle part of the auger stem of static-pressure pile planting machine
It is connect with supply air system and squeezing trolley, air outlet is provided on auger, nozzle, auger stem and spiral shell are provided at air outlet
Rotary drill connects, and the second end of runner is connected with air outlet, and steel sheet pile construction step further includes：Rock stratum is bored in auger
During pick, if auger enters the solution cavity in rock stratum, auger slowly runs, and squeezing trolley is injected by runner to solution cavity
Cement paste；After the completion of solution cavity slip casting, squeezing trolley stops slip casting, and supply air system clears up runner to runner press-in air, and
Auger continues to carry out drilling to rock stratum, until the sum of multiple single amount of feeding of auger is equal to the total feed amount of setting.
Therefore the mud jacking by setting nozzle and setting and the cooperation of static-pressure pile planting machine at the air outlet of auger
Trolley so that steel sheet pile cofferdam construction method provided by the invention is applied to the riverbed with solution cavity development.So that working as auger
During into solution cavity, squeezing trolley can be injected cement paste by the nozzle on the runner and auger in auger stem molten
Hole to fill solution cavity, strengthens the self-supplying capacity of steel sheet pile, and achievees the effect that sealing, in addition, supply air system is pressed into sky into runner
Gas can realize the cleaning to runner, be blocked to avoid runner by cement paste.
Further embodiment is that steel sheet pile construction step further includes：When auger encounters solution cavity, and completes this steel sheet pile
After press-in, when auger exits riverbed, squeezing trolley carries out slip casting by runner to the stake holes where steel sheet pile.
Therefore when auger exits riverbed, noted using the stake holes that squeezing trolley is formed to auger drilling
Slurry, not only so that the solution cavity in rock stratum is filled, consolidates, but also can be reinforced to the layer of sand on riverbed surface layer, so as to further carry
The self-supplying capacity of high steel sheet pile, and further improve the water-stagnating effect of steel sheet-pile cofferdam.
Further scheme is that the single amount of feeding is 0.8 meter to 1.2 meters, and steel sheet pile construction step further includes：In spiral
It bores and drilling is carried out to rock stratum, and when solution cavity is encountered in auger, in steel sheet pile process of press in, supply air system is by runner to brill
Air is pressed into hole.
Therefore when auger to do not have the rock stratum of solution cavity carry out drilling when, can by supply air system to bore
A small amount of ground in hole is cleared up, so as to reduce resistance suffered when steel sheet pile is pressed into.
Another Preferable scheme is that, steel sheet pile construction step further includes：When static-pressure pile planting machine is often pressed into predetermined quantity
After steel sheet pile, static-pressure pile planting machine is moved at the steel sheet pile of newest press-in, and before the movement of static-pressure pile planting machine, what is be pressed into
The side welding clamping plate of a plurality of steel sheet pile.
Therefore before the movement of static-pressure pile planting machine, by welding clamping plate in the side for being pressed into steel sheet pile, make clamping plate pair
Steel sheet pile is fixedly connected, so as to prevent the steel sheet pile stress being pressed into caused by after being moved due to static-pressure pile planting machine from going out
Existing torsional deformation happens.
Further embodiment is that steel sheet pile construction step further includes：Laser is installed in the construction platform of static-pressure pile planting machine
Instrument, the transmitting terminal of laser are set towards the steel sheet pile in press-in.
Therefore by setting laser so that construction personnel can monitor the press-in of steel sheet pile in real time, with
It rectifies a deviation in time convenient for steel sheet pile, the sealing of the steel sheet-pile cofferdam after ensureing the construction quality of steel sheet-pile cofferdam and closing up
Property.
Further scheme is that steel sheet pile construction step further includes：In steel sheet pile process of press in, real time correction steel plate
Steel sheet pile if correcting in vain, is pulled out weight by the position of stake and verticality.
Therefore need timely to rectify a deviation to steel sheet pile in work progress, steel sheet pile position offset is avoided to exaggerate,
The leakproofness of steel sheet-pile cofferdam after ensureing the construction quality of steel sheet-pile cofferdam and closing up.In addition, when steel sheet pile can not pass through
Pultrusion when carrying out aligning, needs to carry out steel sheet pile to pull out weight, can not be closed up to avoid steel sheet-pile cofferdam.
Further scheme is that support system installation steps further include：Complete purlin layer and inner supporting structure installation
Afterwards, check the percolating water situation of steel sheet-pile cofferdam, if steel sheet-pile cofferdam there are during percolating water, using filler to steel sheet-pile cofferdam
Leakage repaired.
Therefore after the completion of steel sheet pile cofferdam construction, need to be detected the leakproofness of steel sheet-pile cofferdam, avoid
Steel sheet-pile cofferdam leaks, and ensures the stability of steel sheet-pile cofferdam and ensures excavation of foundation pit and cushion cap in steel sheet-pile cofferdam
Construction, and then ensure dry digging operation.
Further scheme is to carry out cleaning to the region to be onstructed of steel sheet-pile cofferdam to include：Excavate region to be onstructed
The slabstone shed when interior erratic boulder and shore protection.
Therefore it treats the slabstone shed when the erratic boulder in construction area and shore protection and excavate and can prevent steel plate
Stake touching erratic boulder or slabstone in press-in, and then prevent steel sheet pile from shifting when being pressed into.
Further scheme is to carry out geologic information acquisition during drilled pile construction to include：It obtains and determines sand
Layer thickness, the thickness of rock stratum, the position of solution cavity, solution cavity depth.
Therefore by thickness to layer of sand, the thickness of rock stratum, the position of solution cavity, solution cavity depth geologic parameter
Acquisition, with determine steel sheet pile cofferdam construction during construction location, construction drawing, construction parameter and construction required in advance
The dependencies of processing.
Description of the drawings
Fig. 1 is the steel sheet-pile cofferdam scheme of installation of steel sheet pile cofferdam construction embodiment of the method for the present invention.
Fig. 2 is that the structure after the steel sheet-pile cofferdam clipped component of steel sheet pile cofferdam construction embodiment of the method for the present invention is shown
It is intended to.
The invention will be further described with reference to the accompanying drawings and embodiments.
Specific embodiment
Referring to Figures 1 and 2, steel sheet pile cofferdam construction method of the present invention is available for the riverbed with competent bed or with heavily fortified point
Hard formation and the riverbed developed with solution cavity.Wherein, before the construction for carrying out steel sheet-pile cofferdam 1, steel trestle can be carried out first, bored
Hole platform is built, and after the completion of steel trestle, drilling platform are built, carries out the construction of drilled pile, and complete in drilled pile construction
Drilling platform is removed afterwards.
In addition, runner is provided in the middle part of the auger stem for the static-pressure pile planting machine 2 that the present invention uses, and the first end of runner point
It is not connect with the supply air system of peripheral hardware and squeezing trolley, runner can be used for the pressure-air that supply air system is pressed into that passes through, it is also possible to
In the cement paste of current squeezing trolley press-in.And ventilation opening is provided on the auger of static-pressure pile planting machine 2, it is set at ventilation opening
There is nozzle, auger stem is connect with auger, and the second end of runner is connected with air outlet, and air outlet can be used for supply air system
The pressure-air of press-in is blowed in the drilling gone out to auger drilling, and nozzle can be used for the cement paste for pumping squeezing trolley
In injection to the solution cavity 61 in the rock stratum 6 in riverbed.Specifically, steel sheet pile cofferdam construction method specifically includes following steps：
Data collection step：
Geologic information acquisition is carried out during drilled pile construction is carried out, the acquisition of geologic information mainly includes obtaining and determining river
The bed thickness of layer of sand 5, the thickness of rock stratum 6, the position of solution cavity 61 and solution cavity 61 depth, so as to by thickness to layer of sand 5,
The acquisition of the geologic parameters such as the depth of the thickness of rock stratum 6, the position of solution cavity 61 and solution cavity 61 determines that steel sheet-pile cofferdam 1 is constructed
Construction location in the process, construction parameter, construction drawing and pretreated dependencies required for construction.
Cleanup step：
The region to be onstructed of steel sheet-pile cofferdam 1 is cleared up, mainly includes excavating in the region to be onstructed of steel sheet-pile cofferdam 1
Erratic boulder and shore protection when the slabstone shed, and then avoid when being pressed into steel sheet pile 10, steel sheet pile 10 due to erratic boulder
Or slabstone occurs touching and shifts.
Static-pressure pile planting machine installation steps：
After the cleanings such as erratic boulder, the slabstone in region to be onstructed of steel sheet-pile cofferdam 1 are completed, used in the upstream end in region to be onstructed
Vibration hammer inserting piling counter-force stake group, and static-pressure pile planting machine 2 is mounted in counter-force stake group.Wherein, a plurality of steel can be used in counter-force stake group
Sheet pile forms, and counter-force stake group mainly provides installation space, and position in steel sheet-pile cofferdam 1 early period of construction for static-pressure pile planting machine 2
Static-pressure pile planting machine 2 provides counter-force when being pressed into steel sheet pile 10, ensures the steel sheet pile press-in that steel sheet-pile cofferdam 1 is constructed early period.It is preferred that
Ground, the quantity of counter-force stake group are 2 to 4 steel sheet piles, and the steel sheet pile quantity in counter-force stake group is true according to the model of static-pressure pile planting machine 2
It is fixed.And vibration hammer preferably uses hydraulic vibration driver.
Steel sheet pile construction step：
A plurality of 10 sub- steel sheet-pile cofferdam 1 of steel sheet pile is waited to apply using static-pressure pile planting machine 2 along the region to be onstructed of steel sheet-pile cofferdam 1
The upstream end in work area domain is pressed into riverbed one by one to the downstream in the region to be onstructed of steel sheet-pile cofferdam 1.For example, as shown in Fig. 2,
The flow direction that Z is 1 place riverbed of steel sheet-pile cofferdam is flowed to, it, can when a plurality of steel sheet pile 10 is pressed into riverbed by static-pressure pile planting machine 2
First a plurality of steel sheet pile 10 to be constructed one by one along direction A1, direction B and direction C successively from starting point A using a static-pressure pile planting machine 2
D to terminal, then static-pressure pile planting machine 2 be pressed into steel sheet pile 10 one by one from starting point A along direction A2 to terminal D, after it is complete at terminal D
Into closing up for steel sheet-pile cofferdam 1.
Preferably, two static-pressure pile planting machines 2 can also be used individually to construct from starting point A to terminal D, for example, First is quiet
Pressure pile-grafting machine 2 successively constructs a plurality of steel sheet pile 10 D to terminal along direction A1, direction B and direction C from starting point A one by one, and second
Platform static-pressure pile planting machine 2 is pressed into steel sheet pile 10 one by one from starting point A along direction A2 to terminal D, after at terminal D complete steel sheet-pile cofferdam
1 closes up.
Steel sheet pile 10 can be contacted first with the layer of sand 5 in riverbed at the initial stage of press-in, after across weak layer of sand 5 ability with it is hard
Rock stratum 6 contact.Specifically, the press-in of every steel sheet pile 10 includes the following steps：
When steel sheet pile 10 is pressed into the layer of sand 5 on riverbed surface layer, at this moment since layer of sand 5 is than relatively soft, so the spiral shell of static-pressure pile planting machine 2
Rotary drill can remain turned-off or keep slow rotary state.In addition, when steel sheet pile 10 is pressed into layer of sand 5, due to layer of sand 10 more
It is soft, it is therefore desirable to the press-in speed of steel sheet pile 10 is controlled, avoids press-in speed too fast and that steel sheet pile 10 is caused to occur is crooked, into
And ensure the verticality of steel sheet pile 10.
In addition, before the construction of steel sheet pile 10, laser 3 is installed in the construction platform of static-pressure pile planting machine 2, also, make to swash
The transmitting terminal of light instrument 3 is set towards static-pressure pile planting machine 2 so that when steel sheet pile 10 is pressed into, laser 3 can be towards the steel in press-in
Sheet pile 10 is set.By setting laser 3 so that construction personnel control static-pressure pile planting machine 2 steel sheet pile 10 is pressed into when,
The press-in situation of steel sheet pile 10 can be monitored in real time, so that when position offset occurs in steel sheet pile 10, it can be timely
It rectifies a deviation to steel sheet pile 10, ensure the construction quality of steel sheet-pile cofferdam 1 and closes up the leakproofness of rear steel sheet-pile cofferdam 1.It is excellent
Infrared radiation instrument can be used in selection of land, laser 3.
When steel sheet pile 10 approaches the rock stratum 6 in riverbed, static-pressure pile planting machine 2 starts to start auger, and auger is kept at this time
Normal velocity of rotation starts to carry out drilling to rock stratum 6.In drilling, auger can be according to the single amount of feeding of setting to rock stratum
Multiple drilling is carried out, until when the sum of multiple single amount of feeding is equal to the total feed amount of setting, stops completing to this steel sheet pile
10 press-in.Preferably, the single amount of feeding is 0.8 meter to 1.2 meters.
Specifically, the drilling each time of auger includes：
Auger is moved to riverbed depths, is carried out drilling to rock stratum 6, is crushed the core ground at stake end, this is completed in auger
After drilling, a drilling can be formed, at this point, auger is reversely extracted, while steel sheet pile 10 is pressed into this by static-pressure pile planting machine 2
The bottom of drilling.Wherein, drilling is carried out to rock stratum 6 in auger, and when the solution cavity 61 in rock stratum 6 is encountered in auger, in steel
In the process of press in of sheet pile 10, press-in is empty in the air-supply steering drilling that supply air system passes through the runner and auger of auger stem
Gas.Pressure-air is blowed into drilling by the supply air system being connect with static-pressure pile planting machine 2 so that when auger is not to having
When the rock stratum 6 of solution cavity 61 carries out drilling, a small amount of ground in drilling can be cleared up by supply air system so that ground quilt
Drilling is taken out of, so as to reduce resistance suffered when steel sheet pile 10 is pressed into.And when steel sheet pile 10 is pressed into the drilling of this drilling
Behind bottom, auger can voluntarily be fed and start drilling next time.Auger repeats above-mentioned drilling operation and steel sheet pile
10 repeat above-mentioned push operation, until when the sum of multiple single amount of feeding of auger is equal to the total feed amount of setting, completion pair
When the press-in of steel sheet pile.
And when auger to rock stratum 6 carry out drilling when, if auger encounter the solution cavity 61 in rock stratum 6 and enter solution cavity 61
When, auger switches to bottom gear and slowly runs, meanwhile, supply air system stops empty to the runner press-in high pressure of auger stem
Gas, and squeezing trolley injects cement paste by runner into solution cavity 61 so that at the air outlet that cement paste passes through auger
Nozzle cut outward in the filler of injection solution cavity 61, and auger holding slowly runs and can be ensured that the slip casting of cement paste
Density.Since the filler of solution cavity 61 is the clay rich in water, sand grains, self-holding force difference after the press-in of steel sheet pile 10 can be caused.Institute
With by injecting cement paste to solution cavity 61 to fill solution cavity 61, so that the filler consolidation of solution cavity 61, forms churning
Stake enhances the self-supplying capacity of steel sheet pile 10, and row plays the role of water-stop curtain wall to a certain extent, achievees the effect that sealing.
After the completion of 61 slip casting of solution cavity, squeezing trolley stops slip casting, and then supply air system is pressed into the runner of auger stem
A small amount of air, to clear up runner, so as to which runner be avoided to be blocked by cement paste.Then, auger continues to repeat drilling work, will
Steel sheet pile 10 is pressed into rock stratum 6, until steel sheet pile 10 to designed elevation, i.e. the sum of multiple single amount of feeding of auger is equal to and sets
Fixed total feed amount.In addition, the solution cavity 61 in auger encounters rock stratum 6, and after completing the press-in of this steel sheet pile 10, in spiral shell
Rotary drill exit riverbed prepare to next steel sheet pile 10 carry out press-in construction when, squeezing trolley again through auger stem runner
And the nozzle on auger carries out slip casting to the stake holes where steel sheet pile 10, both so that the solution cavity 61 in rock stratum 2 is further
Filling, consolidation, stake holes are filled closely knit, form complete rotary churning pile, and the layer of sand 5 on riverbed surface layer can be reinforced, from
And the self-supplying capacity of steel sheet pile 10 is further improved, and further improve the water-stagnating effect of steel sheet-pile cofferdam 1.Wherein, it is described above
Stake holes promoted by auger from the layer of sand 5 in riverbed, drilling to the designed elevation for designing steel sheet pile 10 when the blind hole that is formed, i.e.,
For accommodating the blind hole of steel sheet pile 10.
Then, the construction procedure of above-mentioned single steel sheet pile 10 is repeated, a plurality of steel sheet pile 10 is pressed into one by one, until completing
Steel sheet-pile cofferdam 1 closes up.Wherein, in 10 process of press in of steel sheet pile, the position of real time correction steel sheet pile 10 and vertical is needed
Degree so as to which the position offset due to steel sheet pile 10 be avoided to exaggerate, ensures the construction quality of steel sheet-pile cofferdam 1 and closes up rear steel plate
The leakproofness of pile cofferdam 1.And when correct it is invalid, can not correct when, steel sheet pile 10 is extracted into weight so that when 10 nothing of steel sheet pile
Steel sheet pile 10 when carrying out aligning, is extracted weight by method by pultrusion, can not be closed to avoid 1 later stage of steel sheet-pile cofferdam
Hold together.
In addition, after static-pressure pile planting machine 2 is often pressed into steel sheet pile 10 of predetermined quantity, need to move in static-pressure pile planting machine 2
To the steel sheet pile 10 of newest press-in, to ensure that static-pressure pile planting machine 2 has the press-in of enough counter-force supporting plate stakes 10, ensure
The press-in quality of steel sheet pile 10 and pushed position, the steel sheet pile 10 of predetermined quantity generally described above are advisable with 5 to 7.And quiet
Before pile-grafting machine 2 is pressed to move, need to weld clamping plate in the side for a plurality of steel sheet pile 10 being pressed into, make clamping plate by a plurality of steel sheet pile 10
It is fixedly connected, is turned round so as to prevent 10 stress of steel sheet pile being pressed into caused by after being moved due to static-pressure pile planting machine 2
Song deformation.
Cofferdam fold step：
Before steel sheet-pile cofferdam closes up, counter-force stake group is first pulled out, because counter-force stake group is to carry out inserting piling by vibration hammer, hard
Rock stratum 6 in be to be unable to reach designed elevation, so general counter-force stake group is only intended to steel sheet pile 10 early period of inserting piling and static pressure is planted
Stake machine 2 provides installation site and provides counter-force to the press-in of steel sheet pile 10 for static-pressure pile planting machine 2.After counter-force stake group is pulled out, lead to
It crosses static-pressure pile planting machine 2 and a plurality of steel sheet pile 10 is pressed into, and complete according to above-mentioned steel sheet pile construction step again in the position of counter-force stake group
Pairs of steel sheet-pile cofferdam 1 closes up, and the downstream in the region to be onstructed for closing up steel sheet-pile cofferdam 1 to be located at of steel sheet-pile cofferdam 1
It holds, i.e. terminal D points side in Fig. 2.
Support system installation steps：
After steel sheet-pile cofferdam 1 closes up, 4 He of purlin layer is successively installed from more than the riverbed water surface to riverbed in steel sheet-pile cofferdam 1
Inner supporting structure.For example, after the closing up of steel sheet-pile cofferdam 1 is completed, first layer purlin layer is installed first more than the riverbed water surface
With first layer inner supporting structure.Then, by the water in steel sheet-pile cofferdam 1 extract to second layer inner supporting structure be related to position with
After lower 1 meter, carry out the installation of second layer purlin layer and second layer inner supporting structure, and so on until exposing riverbed surface.
Then, after the installation of all purlin layers and inner supporting structure is completed, the percolating water situation of steel sheet-pile cofferdam is checked,
If steel sheet-pile cofferdam 1 repairs the leakage of steel sheet-pile cofferdam 1 using filler there are during percolating water.Specifically, if steel
When the leakage notch of sheet-pile cofferdam 1 is smaller, can utilize leakage differential water pressures generate suction principle at leak steel sheet pile
The fillers such as fine sand, wood sawdust, flyash are smeared on 10 so that filler is sucked into notch under the action of leakage suction
In, notch is blocked, to reduce water percolating capacity or eliminate Seepage.If the leakage drainage of steel sheet-pile cofferdam 1 is serious,
Old cotton-wadded quilt or geotextiles etc. can be used and cut out 3 centimetres to 5 centimetres loose long strip, then send diver in steel sheet-pile cofferdam
1 outside blocks long strip on steel sheet pile 10 from the water surface to riverbed face, to solve seepy question.
To sum up, steel sheet pile cofferdam construction method provided by the invention is applicable to underwater dumped rockfill bank protection, riverbed erratic boulder
And the riverbed of competent bed, it may also be used for there is the riverbed of solution cavity development in rock stratum.In the construction process, it is planted first using static pressure
Jackstone, erratic boulder on stake machine cleaning riverbed at stake position, to penetrate through barrier, generation position is inclined during so as to which steel sheet pile being avoided to be pressed into
It moves.Secondly, static-pressure pile planting machine can be realized carries out drilling to the competent bed in riverbed, can effectively inhibit pressure napiform root
Occur, also, steel sheet pile can be pressed into rock in a manner that the auger of landfill extracts gap while auger is produced
In layer, mitigate resistance suffered when steel sheet pile is pressed into moreover, can be acted on while steel sheet pile is pressed by auger digging
Power, and then overcome the problems, such as that competent bed is difficult to inserting piling steel sheet pile.And when auger enters solution cavity, mud jacking platform can be passed through
Cement paste is injected solution cavity by vehicle, to fill solution cavity, strengthens the self-supplying capacity of steel sheet pile, and achieve the effect that sealing.In addition, pass through
The mode of auger drilling can make the destruction of rock stratum be limited in minimum range, while soil discharge quantity is reduced, can drop
The integrality of steel sheet pile periphery rock stratum after suffered resistance and guarantee are pressed into during low steel sheet pile press-in, so that steel plate
Stake has stronger holding power, and ensure that the verticality and tight ness rating of steel sheet pile, meanwhile, pass through the steel sheet-pile cofferdam of the present invention
The steel sheet-pile cofferdam that construction method is constructed out can realize the effect that can meet steel sheet-pile cofferdam waterproof without concrete sealing bottom
Fruit avoids the troublesome operation for needing after traditional cofferdam construction to carry out concrete sealing bottom, has that noise is small, pollution is low, safe
And the advantages of environmental protection, it is applicable to the riverbed developed in the riverbed and lithosphere with solid rock layer with solution cavity.
Finally it is emphasized that the foregoing is merely the preferred embodiment of the present invention, it is not intended to restrict the invention, it is right
For those skilled in the art, the present invention can have various change and change, all within the spirits and principles of the present invention,
Any modification, equivalent substitution, improvement and etc. done, should all be included in the protection scope of the present invention.
Claims (10)
1. steel sheet pile cofferdam construction method, which is characterized in that including：
Data collection step carries out geologic information acquisition during drilled pile construction；
Cleanup step clears up the region to be onstructed of steel sheet-pile cofferdam；
Static-pressure pile planting machine installation steps, in the upstream end in the region to be onstructed using vibration hammer inserting piling counter-force stake group, by static pressure
Pile-grafting machine is mounted in the counter-force stake group；
Steel sheet pile construction step, along the region to be onstructed using the static-pressure pile planting machine by a plurality of steel sheet pile from the upstream end
It is pressed into riverbed one by one to the downstream in the region to be onstructed, the press-in of every steel sheet pile includes：When the steel sheet pile pressure
When entering the layer of sand on riverbed surface layer, the auger of the static-pressure pile planting machine remains turned-off or keeps slow rotary state, when the steel
When sheet pile approaches the rock stratum in the riverbed, start the auger, the auger is according to the single amount of feeding of setting to described
Rock stratum carries out multiple drilling, and the drilling each time of the auger includes：After the spiral drilling is completed and forms drilling, instead
To the extraction auger, and the steel sheet pile is pressed into the bottom of the drilling, and is pressed into when the steel sheet pile to institute
Behind the bottom for stating drilling, the auger carries out drilling next time, until the multiple single amount of feeding of the auger it
With the total feed amount equal to or more than setting；
Cofferdam fold step before the steel sheet-pile cofferdam closes up, pulls out the counter-force stake group, is walked according to the steel sheet pile construction
Suddenly it is pressed into a plurality of steel sheet pile again on the position of the counter-force stake group, and completes closing up for the steel sheet-pile cofferdam, and
The steel sheet-pile cofferdam is closed up in the downstream in the region to be onstructed；
Support system installation steps, after the steel sheet-pile cofferdam closes up, from the water in the riverbed in the steel sheet-pile cofferdam
More than face purlin layer and inner supporting structure are successively installed to the riverbed.
2. steel sheet pile cofferdam construction method according to claim 1, it is characterised in that：
Be provided with runner in the middle part of the auger stem of the static-pressure pile planting machine, the first end of the runner respectively with supply air system and pressure
Starch trolley connection；
Air outlet is provided on the auger, nozzle, the auger stem and the auger are provided at the air outlet
Connection, and the second end of the runner is connected with the air outlet；
The steel sheet pile construction step further includes：
It is described if the auger enters the solution cavity in the rock stratum when the auger carries out drilling to the rock stratum
Auger slowly runs, and the squeezing trolley injects cement paste by the runner to the solution cavity；
After the completion of the solution cavity slip casting, the squeezing trolley stops slip casting, and the supply air system is pressed into air to the runner
The runner is cleared up, and the auger continues to carry out drilling to the rock stratum, until the multiple single of the auger
The sum of amount of feeding is equal to the total feed amount of setting.
3. steel sheet pile cofferdam construction method according to claim 2, it is characterised in that：
The steel sheet pile construction step further includes：
When the auger encounters the solution cavity, and after completing this steel sheet pile press-in, exited in the auger described
During riverbed, the squeezing trolley carries out slip casting by the runner to the stake holes where the steel sheet pile.
4. steel sheet pile cofferdam construction method according to claim 2, it is characterised in that：
The single amount of feeding is 0.8 meter to 1.2 meters；
The steel sheet pile construction step further includes：
Drilling is carried out to the rock stratum, and when the solution cavity is encountered in the auger in the auger, in the steel sheet pile
In process of press in, the supply air system is pressed into air by the runner into the drilling.
5. steel sheet pile cofferdam construction method according to claim 1, it is characterised in that：
The steel sheet pile construction step further includes：
After the static-pressure pile planting machine is often pressed into the steel sheet pile of predetermined quantity, the static-pressure pile planting machine is moved to newest pressure
At the steel sheet pile entered, and before static-pressure pile planting machine movement, welded in the side for a plurality of steel sheet pile being pressed into
Clamping plate.
6. steel sheet pile cofferdam construction method according to any one of claims 1 to 5, it is characterised in that：
The steel sheet pile construction step further includes：
Laser is installed in the construction platform of the static-pressure pile planting machine, the transmitting terminal of the laser is described towards in being pressed into
Steel sheet pile is set.
7. steel sheet pile cofferdam construction method according to claim 6, it is characterised in that：
The steel sheet pile construction step further includes：
In the steel sheet pile process of press in, the position of steel sheet pile described in real time correction and verticality, if correcting in vain, by institute
It states steel sheet pile and pulls out weight.
8. steel sheet pile cofferdam construction method according to claim 7, it is characterised in that：
The support system installation steps further include：
After the purlin layer and inner supporting structure installation is completed, the percolating water situation of the steel sheet-pile cofferdam is checked, if
The steel sheet-pile cofferdam repairs the leakage of the steel sheet-pile cofferdam using filler there are during percolating water.
9. steel sheet pile cofferdam construction method according to claim 8, it is characterised in that：
The region to be onstructed to steel sheet-pile cofferdam carries out cleaning and includes：
Excavate the slabstone shed when the erratic boulder and shore protection in the region to be onstructed.
10. steel sheet pile cofferdam construction method according to claim 9, it is characterised in that：
The progress geologic information acquisition during drilled pile construction includes：
Obtain and determine the thickness of the layer of sand, the thickness of the rock stratum, the position of the solution cavity, the solution cavity depth.
Priority Applications (1)
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| CN201810013802.4A CN108222040A (en) | 2018-01-08 | 2018-01-08 | Steel sheet pile cofferdam construction method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810013802.4A CN108222040A (en) | 2018-01-08 | 2018-01-08 | Steel sheet pile cofferdam construction method |
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| CN201810013802.4A Pending CN108222040A (en) | 2018-01-08 | 2018-01-08 | Steel sheet pile cofferdam construction method |
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Application publication date: 20180629 |