CN108179759A - The underwater drill core slotting of driftway is without bottom sealing method - Google Patents
The underwater drill core slotting of driftway is without bottom sealing method Download PDFInfo
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- CN108179759A CN108179759A CN201711481666.3A CN201711481666A CN108179759A CN 108179759 A CN108179759 A CN 108179759A CN 201711481666 A CN201711481666 A CN 201711481666A CN 108179759 A CN108179759 A CN 108179759A
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- steel pipe
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- driftway
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- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000007789 sealing Methods 0.000 title claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 217
- 239000010959 steel Substances 0.000 claims abstract description 217
- 238000009434 installation Methods 0.000 claims abstract description 25
- 238000010276 construction Methods 0.000 claims abstract description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 37
- 239000011435 rock Substances 0.000 claims description 25
- 239000004567 concrete Substances 0.000 claims description 21
- 238000005553 drilling Methods 0.000 claims description 6
- 238000007667 floating Methods 0.000 claims description 5
- 150000001875 compounds Chemical class 0.000 claims description 4
- 238000009826 distribution Methods 0.000 claims description 4
- 230000008595 infiltration Effects 0.000 claims description 4
- 238000001764 infiltration Methods 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 4
- 230000002787 reinforcement Effects 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 claims description 4
- 239000002893 slag Substances 0.000 claims description 4
- 239000000725 suspension Substances 0.000 claims description 4
- 238000003466 welding Methods 0.000 claims description 4
- 210000003205 muscle Anatomy 0.000 claims 1
- 238000005422 blasting Methods 0.000 abstract description 6
- 230000009286 beneficial effect Effects 0.000 abstract description 3
- 239000011150 reinforced concrete Substances 0.000 description 4
- 241000209094 Oryza Species 0.000 description 3
- 235000007164 Oryza sativa Nutrition 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 235000009566 rice Nutrition 0.000 description 3
- 239000002689 soil Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 229920002472 Starch Polymers 0.000 description 1
- 238000009412 basement excavation Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 235000012149 noodles Nutrition 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 235000019698 starch Nutrition 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 235000020681 well water Nutrition 0.000 description 1
- 239000002349 well water Substances 0.000 description 1
Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/02—Restraining of open water
- E02D19/04—Restraining of open water by coffer-dams, e.g. made of sheet piles
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
- E21B15/003—Supports for the drilling machine, e.g. derricks or masts adapted to be moved on their substructure, e.g. with skidding means; adapted to drill a plurality of wells
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B15/00—Supports for the drilling machine, e.g. derricks or masts
- E21B15/02—Supports for the drilling machine, e.g. derricks or masts specially adapted for underwater drilling
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/12—Underwater drilling
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0061—Production methods for working underwater
- E02D2250/0076—Drilling
-
- 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)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Geochemistry & Mineralogy (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Civil Engineering (AREA)
- Paleontology (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of underwater drill core slotting of driftway without bottom sealing method, including following construction procedure:S1, steel trestle and drill core platform are set up；S2, drill core slotting construction；S3, installation steel cofferdam；S4, cofferdam slot concreting；S5, foundation pit and pile foundation are excavated；S6, pile foundation and bearing platform construction.The beneficial effects of the present invention are：It is cost-effective, without in-place blasting out circle, sealing risk is smaller, speed of application is very fast, the duration is shorter.
Description
Technical field
The present invention relates to highway crash facility technology fields waterborne, and in particular to a kind of underwater drill core slotting of driftway is without envelope
Bottom method.
Background technology
Bridge as connection river two sides plays very important effect in modern society.For example it is just built on the Changjiang river
If hundreds of bridges, people and Che here reach opposite bank through the Crossing the bridge noodles Congjiang, ship fair current and mistake under bridge.When ship passes through under bridge
When, if unexpected knock bridge, huge damage can be caused to bridge.Therefore, general use arranges arc under the bridge of river two sides
The anticollision band of shape surrounds bridge to form protection zone on bridge water.In the engineering of construction anticollision band, it is proposed that a variety of to lead
The drill core slotting arrangement and method for construction under well water quick-fried has back cover method including boring quick-fried no back cover method under water and boring under water.It is quick-fried using boring under water
Excavating load, steel cofferdam periphery and inner circumferential pour curtain concrete, after concrete reaches some strength, are bored under water on curtain concrete
Pore pressure starches sealing.Quick-fried in-place blasting out circle cranny development and irregular is bored under water, it is extremely disadvantageous to mud jacking sealing.Boring under water quick-fried has
The i.e. lower drill-blast tunnelling of back cover construction method water installs the steel cofferdam of intensification, pours bottom concrete, treat back cover concrete to certain depth
Up to after intensity, draw water in cofferdam, dry application work basis.Therefore quick-fried no back cover method is bored under water there are the in-place blasting out circles that underwater demolition generates
Sealing dangerous and deep water mud jacking sealing cost more difficult the shortcomings of estimating, bore quick-fried longer and apply with the presence of the back cover method duration under water
The shortcomings that work cost is very big.It is therefore desirable to seek it is a kind of it is cost-effective, without in-place blasting out circle, sealing risk is smaller, construction speed
The method that degree is very fast and the duration is shorter.
Invention content
In view of this, the purpose of the present invention is to provide a kind of underwater drill core slotting of driftway without bottom sealing method.
In order to achieve the above objectives, the present invention provides following technical solution：A kind of underwater drill core slotting of driftway is without back cover side
Method, it is characterised in that, including following construction procedure:
S1, steel trestle and drill core platform are set up, intectate position is using drill core pore-forming in trestle column steel pipe, pouring reinforcement concrete
Carry out the footing of upright column steel pipe, top uses I-steel girder；
S2, drill core slotting are constructed, and after the completion of trestle and putting up platform, in cofferdam, surrounding places more engineering core drilling machines；Using more
Root is oriented to steel pipe cluster, and top is connected temporarily using reinforcing bar or shaped steel；After the completion of penstock installation is oriented to, you can carry out drill core；
It after the completion for the treatment of drill core pore-forming, releases be oriented between steel pipe interim and connecting and removing guiding steel pipe, using jump bit by Kong Yukong
Between rock punching be broken into slot, disintegrating slag use dredge pump suction to form cofferdam slot in the slot of cofferdam；
S3, installation steel cofferdam, after cofferdam slot is formed, release the lateral of cofferdam slot Internal and external cycle column steel pipe, reinforce former in cofferdam bore
Core steel pipe platform, the platform as installation steel cofferdam；Steel cofferdam is transported to construction site using ship, using crane barge ship entirety merogenesis
Section lifting steel cofferdam；After the decentralization of first segment steel cofferdam, cofferdam itself is in floating state, and cofferdam and cofferdam inner platform are done temporarily
Connection；Lifting the second section steel cofferdam, is welded with first segment steel cofferdam, after the completion of the welding of cofferdam spelling, water filling sinking in cofferdam,
Stop water filling after reaching height, release cofferdam suspension centre, the installation in entire cofferdam is sequentially completed with this；
S4, cofferdam slot concreting, cofferdam are connected outside steel pipe post in cofferdam, at the top of steel cofferdam after installation is complete
Platform is formed, Underwater Concrete conduit is laid along cofferdam inside and outside wall, underwater concrete is poured in the slot of cofferdam；Cofferdam is after installation is complete,
The water in cofferdam is drained, carries out dry application work, it, can the disposition of localized borehole mud jacking because of the infiltration that the crack of rock mass itself occurs；
S5, foundation pit and pile foundation are excavated；
S6, pile foundation and bearing platform construction.
Further, in S1, steel trestle and drill core platform include holder part and trestle part, one end of trestle part
Connecting bracket part；When overlooking holder part, holder part overall structure is rounded, and when overlooking trestle part, trestle part is whole
Body structure is in strip-like-shaped；Holder part includes more root post steel pipes, I-steel girder and checkered steel plate, column steel pipe uniform intervals
It is located on two concentric circles and column steel pipe vertically extends, the lower end of column steel pipe is fixed on water by reinforced concrete
Lower basement rock is fixedly connected in the upper end radially with circumferentially-adjacent two root posts steel pipe by I-steel girder, in I-steel
Checkered steel plate is radially equipped with above girder.
Further, four columns steel pipe also is provided in the middle part of holder part, which is square distribution,
Basement rock under water is fixed in the lower end of the four columns steel pipe, is consolidated between the upper end of the four columns steel pipe by I-steel girder
Fixed, the upper end of the four columns steel pipe passes through I-steel girder and adjacent more root post steel pipes on concentric circle
Upper end is fixedly connected.
Further, also including more, vertically fixed column steel pipe, the lower end of column steel pipe are consolidated for trestle part
Basement rock is scheduled on, the upper end of column steel pipe is fixedly connected by I-steel girder and is equipped with checkered steel plate；In the another of trestle part
One end is equipped with multiple dowels.
Further, it in S2, is oriented to steel pipe and is arranged vertically between two concentric circles, i.e., more guiding
Plane tangent forms the circular column steel pipe for being oriented to steel pipe and being arranged on two concentric circles of cluster between steel pipe
Between.
Further, basement rock under water is fixed in the lower end for being oriented to steel pipe.
Further, the axis spacing of the adjacent two root posts steel pipe in the inner circle of two concentric circles is 4.6
Rice.
Further, the axis spacing of the adjacent two root posts steel pipe in the outer circle of two concentric circles is 7.4
Rice.
Further, it is oriented to steel pipe and compound steel pipe structure is formed between two concentric circles.
The beneficial effects of the present invention are：It is cost-effective, without in-place blasting out circle, sealing risk is smaller, speed of application is very fast,
Duration is shorter.
Description of the drawings
In order to make the purpose of the present invention, technical solution and advantageous effect clearer, the present invention provides drawings described below and carries out
Explanation：
Fig. 1 is trestle and platform schematic top plan view of the underwater drill core slotting of driftway of the present invention without bottom sealing method.
Fig. 2 is Fig. 1 along A-A direction structure schematic diagrames.
Fig. 3 arranges schematic diagram for drill core slotting construction part plan.
Fig. 4 is cofferdam traverse drill core bore position layout drawing.
Fig. 5 is punching drilling machine impact grooving schematic diagram.
Fig. 6 is driftway steel cofferdam mounting plane layout drawing.
Fig. 7 is driftway steel cofferdam mounting vertical plane layout drawing.
Fig. 8 is layout drawing inside the slot concrete placings of cofferdam.
In figure, 1 is column steel pipe, and 2 be I-steel girder, and 3 be reinforced concrete, and 4 be dowel, and 5 is are oriented to steel pipe, and 6 be drilling machine,
7 be jump bit, and 8 be cofferdam slot, and 9 be crane barge ship, and 10 be steel cofferdam, and 11 be concrete conduit.
Specific embodiment
The invention will be further described in the following with reference to the drawings and specific embodiments, so that those skilled in the art can be with
It is better understood from the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
Embodiment one：A kind of underwater drill core slotting of driftway of the present embodiment is without bottom sealing method, including following construction procedure:
S1, steel trestle and drill core platform are set up, intectate position is come steady using drill core pore-forming in trestle column steel pipe, pouring reinforcement concrete
Gu the footing of column steel pipe, top uses I-steel girder；S2, drill core slotting are constructed, and after the completion of trestle and putting up platform, are being enclosed
Weir surrounding places more engineering core drilling machines；Using more guiding steel pipe clusters, top is connected temporarily using reinforcing bar or shaped steel；When leading
After the completion of penstock installation, you can carry out drill core；After the completion for the treatment of drill core pore-forming, connecting and moving temporarily between releasing guiding steel pipe
Walk to be oriented to steel pipe, the rock punching between Kong Yukong be broken by slot using jump bit, in the slot of cofferdam disintegrating slag use dredge pump suction with
Form cofferdam slot；S3, installation steel cofferdam, after cofferdam slot is formed, release the lateral of cofferdam slot Internal and external cycle column steel pipe, reinforce cofferdam
Interior original drill core steel pipe platform, the platform as installation steel cofferdam；Steel cofferdam is transported to construction site using ship, whole using crane barge ship
The segmented lifting steel cofferdam of body；After the decentralization of first segment steel cofferdam, cofferdam itself is in floating state, by cofferdam and cofferdam inner platform
Do interim connection；Lifting the second section steel cofferdam, welds with first segment steel cofferdam, after the completion of the welding of cofferdam spelling, is noted in cofferdam
It is underwater heavy, stop water filling after reaching height, release cofferdam suspension centre, the installation in entire cofferdam is sequentially completed with this；S4, cofferdam slot mix
Solidifying soil pours, and outside steel pipe post in cofferdam is connected, platform is formed at the top of steel cofferdam, along cofferdam after installation is complete by cofferdam
Inside and outside wall lays Underwater Concrete conduit, and underwater concrete is poured in the slot of cofferdam；The water in cofferdam is drained after installation is complete in cofferdam,
Dry application work is carried out, it, can the disposition of localized borehole mud jacking because of the infiltration that the crack of rock mass itself occurs；S5, foundation pit and pile foundation are excavated；
S6, pile foundation and bearing platform construction.
In S1, steel trestle and drill core platform include holder part and trestle part, one end connecting bracket of trestle part
Part；When overlooking holder part, holder part overall structure is rounded, and when overlooking trestle part, trestle part overall structure is in
Strip-like-shaped；Holder part includes more root post steel pipes 1, I-steel girder 2 and checkered steel plate, and 1 uniform intervals of column steel pipe are located at
On two concentric circles and column steel pipe 1 vertically extends, and the lower end of column steel pipe 1 is fixed on water by reinforced concrete 3
Lower basement rock is fixedly connected in the upper end radially with circumferentially-adjacent two root posts steel pipe 1 by I-steel girder 2, in I-shaped
2 top of steel girder is radially equipped with checkered steel plate.
Four columns steel pipe 1 also is provided in the middle part of holder part, which is square distribution, this four
Basement rock under water is fixed in the lower end of column steel pipe 1, is fixed between the upper end of the four columns steel pipe 1 by I-steel girder 2, should
The upper end of four columns steel pipe 1 is upper by I-steel girder 2 and adjacent more root post steel pipes 1 on concentric circle
End is fixedly connected.
Trestle part also includes more, and vertically fixed column steel pipe 1, the lower end of column steel pipe 1 are fixed on base
Rock, the upper end of column steel pipe 1 are fixedly connected by I-steel girder 2 and are equipped with checkered steel plate；The other end in trestle part
Equipped with multiple dowels 4, trestle department is connect with slope surface or basement rock by dowel 4.
In S2, be oriented to steel pipe 5 be arranged vertically between two concentric circles, i.e., more be oriented to steel pipe 5 it
Between plane tangent form the circular steel pipe 5 that is oriented to of cluster and be arranged between the column steel pipe 1 on two concentric circles.
Basement rock under water is fixed in the lower end for being oriented to steel pipe 5.
The axis spacing M of adjacent two root posts steel pipe 1 in the inner circle of two concentric circles is 4.6 meters.
The axis spacing L of adjacent two root posts steel pipe 1 in the outer circle of two concentric circles is 7.4 meters.
It is oriented to steel pipe 5 and compound steel pipe structure is formed between two concentric circles.
Embodiment two：The present embodiment by by this method use in Changjiang River Highway Bridge anti-collision facility engineering for.Assuming that
The engineering includes 1# driftways, and 1# driftways are located at the long north of the Changjiang River and swim on the bank, 15 meters, elevation of bottom+133.5m of driftway diameter,
Elevation of top+180m, foundation bottom connection pile foundation, 2 meters of the diameter pile foundation substrate absolute altitude of pile foundation quantity 9+121.5m.1# driftways
Surface geology situation is complex, and more than absolute altitude+138m is rushes diluvial formation, collapses diluvial layer, artificial stack layer, main component sand
Soil, block stone soil, plain fill.It is oriented in well area in 1# and big boulder, block stone is distributed with.
In the underwater drill core slotting of driftway used 1# driftways without bottom sealing method, including following construction procedure:S1, it takes
If steel trestle and drill core platform, using drill core pore-forming in trestle column steel pipe 1, pouring reinforcement concrete 3 consolidates for intectate position
The footing of column steel pipe 1, top use I-steel girder 2.Specifically, as depicted in figs. 1 and 2, steel trestle and drill core platform packet
Include holder part and trestle part, one end connecting bracket part of trestle part；When overlooking holder part, holder part is integrally tied
Structure is rounded, and when overlooking trestle part, trestle part overall structure is in strip-like-shaped；Holder part includes more root post steel pipes 1, work
Word steel girder 2 and checkered steel plate, 1 uniform intervals of column steel pipe are located on two concentric circles and column steel pipe 1 is along vertical side
To extension, basement rock under water is fixed in the lower end of column steel pipe 1 by reinforced concrete 3, radially with circumferentially-adjacent two root posts
The upper end of steel pipe 1 is fixedly connected by I-steel girder 2, and checkered steel plate is radially equipped with above I-steel girder 2.
Four columns steel pipe 1 also is provided in the middle part of holder part, which is square distribution, this four
Basement rock under water is fixed in the lower end of column steel pipe 1, is fixed between the upper end of the four columns steel pipe 1 by I-steel girder 2, should
The upper end of four columns steel pipe 1 is upper by I-steel girder 2 and adjacent more root post steel pipes 1 on concentric circle
End is fixedly connected.
Trestle part also includes more, and vertically fixed column steel pipe 1, the lower end of column steel pipe 1 are fixed on base
Rock, the upper end of column steel pipe 1 are fixedly connected by I-steel girder 2 and are equipped with checkered steel plate；The other end in trestle part
Equipped with multiple dowels 4.
S2, drill core slotting are constructed, and after the completion of trestle and putting up platform, in cofferdam, surrounding places 4 QZ engineering core drilling machines.It encloses
Weir notch drafts width as 3m, and cofferdam slot bottom absolute altitude is+136m（That is cofferdam groove depth about 3m）.As shown in figure 3, it is oriented to 5 edge of steel pipe
Vertical direction is arranged between two concentric circles, i.e., the more annular shapes for being oriented to plane tangent formation cluster between steel pipe 5
Steel pipe 5 is oriented to be arranged between the column steel pipe 1 on two concentric circles.The lower end for being oriented to steel pipe 5 is fixed under water
Basement rock.The axis spacing M of adjacent two root posts steel pipe 1 in the inner circle of two concentric circles is 4.6 meters.Positioned at two
The axis spacing L of adjacent two root posts steel pipe 1 in the outer circle of concentric circle is 7.4 meters.Steel pipe 5 is oriented in two concentric circles
Compound steel pipe structure is formed between circumference.In the present embodiment, using 9 guiding 5 clusters of steel pipe, top uses reinforcing bar or type
Steel connects temporarily.When 1~9# be oriented to steel pipe 5 installation is complete after, you can carry out drill core, drill through 4#, 5#, 6# hole first, treat 4#,
After the completion of 5#, 6# hole drill core, interim connection is released, 1#, 2#, 3# guiding steel pipe 5 are pacified to 10#, 11#, 12#, after installing
Do interim connection in top, you can drill through 7#, 8#, 9# hole, cycle drills through according to this.Cofferdam traverse drill core arrangement of boring holes as shown in Figure 4
Figure, in the present embodiment, 182 a diameter of 0.9 is arranged by a diameter of 1 meter of guiding steel pipe 5 altogether in entire cofferdam slot
The drill core hole of rice, it is 11.25 meters to excavate outer rabbet line radius R1, and cofferdam outer edge radius R2 is 10.25 meters, cofferdam inner edge
Radius R3 is 8.75 meters, and it is 8.25 meters to excavate notch inner edge radius.As shown in figure 5, entire cofferdam slot is applied using four bench drill machines 6
Rock between Kong Yukong after the completion for the treatment of drill core pore-forming, using φ 2.5m jump bits 7 is rushed and is broken into slot by work, disintegrating slag in the slot of cofferdam
Dredge pump is used to be sucked out to form cofferdam slot 8（With reference to figure 6）.
S3, installation steel cofferdam 10, after cofferdam slot is formed, release the lateral of cofferdam slot Internal and external cycle column steel pipe 1, reinforce cofferdam
Interior original drill core steel pipe platform, the platform as installation steel cofferdam；Steel cofferdam is transported to construction site using ship, floating using 300 tons
The whole segmented lifting steel cofferdam 10 of ship 9 is hung, as shown in Figure 7.After the decentralization of first segment steel cofferdam, cofferdam itself is in floating shape
Interim connection is done in cofferdam and cofferdam inner platform by state；Lifting the second section steel cofferdam, is welded, cofferdam group with first segment steel cofferdam
After the completion of welding connects, water filling sinking in cofferdam stops water filling after reaching height, releases cofferdam suspension centre, is completed with this sequence entire
The installation in cofferdam.
S4, cofferdam slot concreting, cofferdam are connected outside steel pipe post in cofferdam, in steel cofferdam after installation is complete
Platform is formed on top, lays Underwater Concrete conduit 11 along cofferdam inside and outside wall, underwater concrete is poured in the slot of cofferdam, as shown in Figure 8.
The water in cofferdam is drained after installation is complete in cofferdam, carries out dry application work, because of the infiltration that the crack of rock mass itself occurs, can locally bore
Pore pressure slurry disposition；S5, foundation pit and pile foundation are excavated；S6, pile foundation and bearing platform construction.
For 1# driftways, according to boring quick-fried no back cover method, general 60 days of duration, expense about 5,000,000, mud jacking sealing under water
Estimate 3,000,000 yuan；According to bore under water it is quick-fried have 120 days back cover method durations, add it is underwater dig the cubic meter of stone, increase about 18,000,000 yuan of expense,
Increase about 1,000,000 yuan of bottom concrete, steel cofferdam deepens about 1,500,000 yuan of increase expense；It is bored under water according to driftway of the present invention
Without bottom sealing method, the duration is estimated 60 days for core slotting, and construction platform and trestle etc. increase about 4,000,000 yuan of expense, and foundation trench excavates expense
About 500,000 yuan, about 300,000 yuan of foundation pit hand excavation.Therefore, the present invention compared to other two methods there are short time limit, without explosion,
The advantages of at low cost.
The beneficial effects of the present invention are：It is cost-effective, without in-place blasting out circle, sealing risk is smaller, speed of application is very fast,
Duration is shorter.
Embodiment described above is only to absolutely prove preferred embodiment that is of the invention and being lifted, protection model of the invention
It encloses without being limited thereto.The equivalent substitute or transformation that those skilled in the art are made on the basis of the present invention, in the present invention
Protection domain within.Protection scope of the present invention is subject to claims.
Claims (9)
1. a kind of underwater drill core slotting of driftway is without bottom sealing method, it is characterised in that, including following construction procedure:
S1, steel trestle and drill core platform are set up, intectate position is using drill core pore-forming in trestle column steel pipe, pouring reinforcement concrete
Carry out the footing of upright column steel pipe, top uses I-steel girder；
S2, drill core slotting are constructed, and after the completion of trestle and putting up platform, in cofferdam, surrounding places more engineering core drilling machines；Using more
Root is oriented to steel pipe cluster, and top is connected temporarily using reinforcing bar or shaped steel；After the completion of penstock installation is oriented to, you can carry out drill core；
It after the completion for the treatment of drill core pore-forming, releases be oriented between steel pipe interim and connecting and removing guiding steel pipe, using jump bit by Kong Yukong
Between rock punching be broken into slot, disintegrating slag use dredge pump suction to form cofferdam slot in the slot of cofferdam；
S3, installation steel cofferdam, after cofferdam slot is formed, release the lateral of cofferdam slot Internal and external cycle column steel pipe, reinforce former in cofferdam bore
Core steel pipe platform, the platform as installation steel cofferdam；Steel cofferdam is transported to construction site using ship, using crane barge ship entirety merogenesis
Section lifting steel cofferdam；After the decentralization of first segment steel cofferdam, cofferdam itself is in floating state, and cofferdam and cofferdam inner platform are done temporarily
Connection；Lifting the second section steel cofferdam, is welded with first segment steel cofferdam, after the completion of the welding of cofferdam spelling, water filling sinking in cofferdam,
Stop water filling after reaching height, release cofferdam suspension centre, the installation in entire cofferdam is sequentially completed with this；
S4, cofferdam slot concreting, cofferdam are connected outside steel pipe post in cofferdam, at the top of steel cofferdam after installation is complete
Platform is formed, Underwater Concrete conduit is laid along cofferdam inside and outside wall, underwater concrete is poured in the slot of cofferdam；Cofferdam is after installation is complete,
The water in cofferdam is drained, carries out dry application work, it, can the disposition of localized borehole mud jacking because of the infiltration that the crack of rock mass itself occurs；
S5, foundation pit and pile foundation are excavated；
S6, pile foundation and bearing platform construction.
2. the underwater drill core slotting of driftway according to claim 1 is without bottom sealing method, which is characterized in that in S1, steel stack
Bridge and drill core platform include holder part and trestle part, and one end of the trestle part connects the holder part；Overlook institute
When stating holder part, the holder part overall structure is rounded, and when overlooking the trestle part, the trestle part is integrally tied
Structure is in strip-like-shaped；The holder part includes more root post steel pipes, I-steel girder and checkered steel plate, and the column steel pipe is uniform
Interval is located on two concentric circles and the column steel pipe vertically extends, and the lower end of the column steel pipe passes through steel
Muscle concrete fixes basement rock under water, is radially being consolidated with the upper end of circumferentially-adjacent two root posts steel pipe by the I-steel girder
Fixed connection, checkered steel plate is radially equipped with above the I-steel girder.
3. the underwater drill core slotting of driftway according to claim 2 is without bottom sealing method, it is characterised in that, in the stent
Four columns steel pipe also is provided in the middle part of partial, which is square distribution, and the lower end of the four columns steel pipe is consolidated
Underwater basement rock is scheduled on, is fixed between the upper end of the four columns steel pipe by the I-steel girder, the four columns steel pipe
Upper end is fixedly connected by the I-steel girder with the upper end of adjacent more root post steel pipes on concentric circle.
4. the underwater drill core slotting of driftway according to claim 3 is without bottom sealing method, it is characterised in that, the trestle part
Also include more vertically fixed column steel pipe, the lower end of column steel pipe be fixed on basement rock, the upper end of column steel pipe leads to
I-steel girder is crossed to be fixedly connected and be equipped with checkered steel plate；The other end in the trestle part is equipped with multiple dowels.
5. the underwater drill core slotting of driftway according to claim 4 is without bottom sealing method, which is characterized in that described in S2
It is oriented to steel pipe to be arranged vertically between two concentric circles, i.e., plane tangent is formed between the more guiding steel pipes
The circular steel pipe that is oriented to of cluster is arranged between the column steel pipe on two concentric circles.
6. the underwater drill core slotting of driftway according to claim 5 is without bottom sealing method, it is characterised in that, the guiding steel
Basement rock under water is fixed in the lower end of pipe.
7. the underwater drill core slotting of driftway according to claim 6 is without bottom sealing method, it is characterised in that, positioned at described two
The axis spacing of adjacent two root posts steel pipe in the inner circle of a concentric circle is 4.6 meters.
8. the underwater drill core slotting of driftway according to claim 7 is without bottom sealing method, it is characterised in that, positioned at described two
The axis spacing of adjacent two root posts steel pipe in the outer circle of a concentric circle is 7.4 meters.
9. the underwater drill core slotting of driftway according to claim 8 is without bottom sealing method, it is characterised in that, the guiding steel
Pipe forms compound steel pipe structure between described two concentric circles.
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| CN201711481666.3A CN108179759B (en) | 2017-12-29 | 2017-12-29 | Underwater core drilling and undercutting bottomless method for pilot well |
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| CN201711481666.3A CN108179759B (en) | 2017-12-29 | 2017-12-29 | Underwater core drilling and undercutting bottomless method for pilot well |
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| CN108179759A true CN108179759A (en) | 2018-06-19 |
| CN108179759B CN108179759B (en) | 2020-06-26 |
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| CN111119212A (en) * | 2019-12-18 | 2020-05-08 | 中建三局基础设施建设投资有限公司 | Construction method for sinking double-wall steel cofferdam under deep clay layer condition |
| CN111119213A (en) * | 2019-12-18 | 2020-05-08 | 中建三局基础设施建设投资有限公司 | Double-wall steel cofferdam with open edge feet and construction method thereof |
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| CN108179759B (en) | 2020-06-26 |
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