CN208563317U - A kind of karst cave treatment structure for pile foundation of bridge pier different height - Google Patents
A kind of karst cave treatment structure for pile foundation of bridge pier different height Download PDFInfo
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- CN208563317U CN208563317U CN201821016741.9U CN201821016741U CN208563317U CN 208563317 U CN208563317 U CN 208563317U CN 201821016741 U CN201821016741 U CN 201821016741U CN 208563317 U CN208563317 U CN 208563317U
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- steel pile
- pile casting
- solution cavity
- karst cave
- casting
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- 239000010959 steel Substances 0.000 claims abstract description 94
- 238000005266 casting Methods 0.000 claims abstract description 90
- 239000004568 cement Substances 0.000 claims abstract description 20
- 239000004927 clay Substances 0.000 claims abstract description 19
- 238000012856 packing Methods 0.000 claims abstract description 7
- 238000010276 construction Methods 0.000 abstract description 12
- 238000005553 drilling Methods 0.000 abstract description 12
- 239000004576 sand Substances 0.000 abstract description 7
- 238000007596 consolidation process Methods 0.000 abstract description 5
- 239000002689 soil Substances 0.000 abstract description 3
- 238000004080 punching Methods 0.000 description 14
- 239000010410 layer Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 9
- 239000012634 fragment Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
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- 241000282693 Cercopithecidae Species 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
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- 230000003020 moisturizing effect Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000013049 sediment Substances 0.000 description 2
- 241001074085 Scophthalmus aquosus Species 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
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- 238000007710 freezing Methods 0.000 description 1
- 210000004209 hair Anatomy 0.000 description 1
- 238000011065 in-situ storage Methods 0.000 description 1
- 239000011229 interlayer Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000006210 lotion Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000009527 percussion Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
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- 230000035939 shock Effects 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
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- 239000004575 stone Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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- Bridges Or Land Bridges (AREA)
Abstract
The utility model discloses a kind of karst cave treatment structures for pile foundation of bridge pier different height, including being worn from ground to the outer steel pile casting of Upper Plate of Karst Cave, the interior steel pile casting in outer steel pile casting, fill in solution cavity, outside interior steel pile casting by the solution cavity filled layer being made of clay, slabstone and bagged cement；The periphery of outer steel pile casting is embedded with aperture retaining wall；Gap between outer steel pile casting and interior steel pile casting is filled with the packing layer being made of C30 Underwater Concrete.The utility model uses the structure type of double steel pile castings, and packing layer is filled in the gap between outer steel pile casting and interior steel pile casting, avoids generating excessive gap between inside and outside steel pile casting；Aperture retaining wall is buried in the periphery of outer steel pile casting, prevents drilling accident, prevents collapsing；It fills filled layer in solution cavity, increases bearing capacity, reinforce the soft soil that consolidation is owed in former filling in solution cavity, reduce collapsing and the bottom spillage of periphery layer of sand, structure is simple, easy to operate, it is ensured that pile foundation of bridge pier smoothly completes, construction safety.
Description
Technical field
The utility model relates to the technical fields of municipal construction, and in particular to a kind of for the molten of pile foundation of bridge pier different height
Hole processing structure.
Background technique
With the fast development of China's economic and transportation business, many urban municipal construction of China are to existing city bridge
Beam is transformed, to meet growth requirement.It is common thing that solution cavity is encountered when Urban Bridge pile foundation construction, and drilling encounters solution cavity
It is whether stable that hole wall is analyzed first, bit freezing, burying situation can or can not occurs.If certainly will not, just further look to rush
Washing lotion misses situation.If flushing liquor leakage is not serious, one can be slowly ground in the bottom of solution cavity using decompression drilling method
A aperture, when the depth of aperture reaches 0.5m or so, so that it may restore normal drilling.If hole wall is stable, flushing liquor leakage
Seriously, the method water blockoff for throwing clay or clay ball can be used.When hole depth is greater than 15m, clay or clay ball are to be not easy on earth
, drilling tool force feed down can be used.If though hole wall is unstable, solution cavity height less, when being not in serious collapsing, can also
Retaining wall is carried out with throwing clay or clay ball method.If hole wall is very unstable, solution cavity height is big, in fact it could happen that serious to collapse and very
To when scrapping, the depth location of solution cavity is first studied.If depth is little, such as at hole depth 15m, so that it may be managed and protected using set
Wall, the method for variable diameter drilling.It is originally the aperture 110mm, 108 casings can be descended, then use 89 drilling tools drilling instead.It constructs in complex area
When, in order to prevent drilling accident, often in the leeway for determining that aperture bore has just stayed level-one, even two-stage.If hole wall is unstable
Fixed and cavern depth is larger, such as uses casing retaining wall, variable diameter drilling method.May because can not caused by recovery of casing cost it is excessively high
When, can be using cement slurry consolidation after, the method crept into again.In order to save time, solid hole cement slurry can add accelerator,
When not having accelerator for the moment, salt can be used.The above processing is the technology developed in recent years, has short construction period, economy suitable
With, building energy consumption is low, urban ecological environment quality is ensured the features such as, for this purpose, having been more and more widely used.But it is existing
There are no the karst cave treatment structures for being directed to pile foundation of bridge pier different height in technology.
Utility model content
In order to overcome the shortcomings in the prior art, the utility model aim is to provide a kind of for pile foundation of bridge pier different height
Karst cave treatment structure, can easy, quick, inexpensive and high quality completion pile foundation of bridge pier different height karst cave treatment process.
In order to solve the above-mentioned technical problem, the utility model provides a kind of at the solution cavity of pile foundation of bridge pier different height
Structure is managed, including being worn from ground to the outer steel pile casting of Upper Plate of Karst Cave, with the outer steel pile casting coaxial arrangement and positioned at outer steel pile casting
Interior interior steel pile casting, the interior steel pile casting pass through solution cavity and wear to solution cavity bottom plate；
It fills in the solution cavity, outside interior steel pile casting by the solution cavity filled layer being made of clay, slabstone and bagged cement；
The periphery of the outer steel pile casting is embedded with aperture retaining wall；
Gap between the outer steel pile casting and interior steel pile casting is filled with the packing layer being made of C30 Underwater Concrete.
Preferably, the built-in length of the aperture retaining wall is 2m, which by diameter is 2.7m, wall thickness is 10mm's
Steel pile casting is constituted.
Wherein, the bottom end of the outer steel pile casting is worn to Upper Plate of Karst Cave 0.2m；It wears to solution cavity bottom the bottom end of the interior steel pile casting
Plate 1m.
In the preferred embodiment in the utility model, the diameter of the outer steel pile casting is 2500mm, wall thickness 15mm, the interior steel
The diameter of casing is 2200mm, wall thickness 10mm.
In the present invention, height h >=4.0m of solution cavity.
Compared with prior art, the utility model has the beneficial effects that
The karst cave treatment structure for pile foundation of bridge pier different height of the utility model uses the structure type of double steel pile castings,
And the packing layer being made of C30 Underwater Concrete is filled in gap between outer steel pile casting and interior steel pile casting, is avoided between inside and outside steel pile casting
Generate excessive gap；Aperture retaining wall is buried in the periphery of outer steel pile casting, prevents drilling accident, prevents collapsing；In solution cavity
The solution cavity filled layer being made of clay, slabstone and bagged cement is inside filled, bearing capacity is increased, former filling in solution cavity is reinforced and owes consolidation
Soft soil, reduce the collapsing and bottom spillage of periphery layer of sand.In outer sinking steel protecting canister to Upper Plate of Karst Cave
When, throwing bagged cement and wire netting fragment, for blocking the gap between outer steel pile casting and Upper Plate of Karst Cave, to prevent external stream
Sand enters in casing.The karst cave treatment structure for pile foundation of bridge pier different height of the utility model is simple, easy to operate, it is ensured that
Pile foundation of bridge pier smoothly completes, construction safety.
Detailed description of the invention
It, below will be to institute in embodiment or description of the prior art in order to illustrate more clearly of the technical solution of the utility model
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some of the utility model
Embodiment for those of ordinary skill in the art without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
In order to illustrate more clearly of the technical solution of the utility model embodiment, the attached drawing of embodiment will be made below simple
Ground introduction.
Fig. 1 is the schematic diagram of the karst cave treatment structure for pile foundation of bridge pier different height of the utility model.
Specific embodiment
The specific embodiment that according to the present invention will be described in detail below with reference to the accompanying drawings, as part of this specification,
Illustrate that the principles of the present invention, other aspect, feature and its advantages of the utility model are detailed by this by embodiment
Illustrate to become apparent.In the attached drawing of institute's reference, the same or similar component is used identical attached in different figures
Figure grade indicates.
Embodiment
The embodiments of the present invention are for DongFeng Automobile Co., Ltd's Huadu factory passenger car production capacity (600,000) enlargings
The Percussion Piles pile bottom sediment of across the bearing main road science of bridge building of project, karst cave treatment construction, guarantee DongFeng Automobile Co., Ltd's Huadu
Across the bearing main road science of bridge building Punching Borehole Cast-in-place Concrete Pile bottom sediment of factory's passenger car production capacity (600,000) expansion project and fraction solution cavity
Borehole cleaning, injecting treatment can be smoothly completed, is handled while not influence No. 9 line subway underground structures and more preferable cooperation subway work work
Make.Across bearing main road science of bridge building is located at Guangzhou Huadu District, North gets Nissan plant area logistics island (K0+000), south to east wind
It produces new factory (K0+380.722) daily, is about 0.38km.Overbridge and the overall length 380.722m that leads the way, bridge and road breadth of leading the way
13m, wherein driveway 11m, dual three-lane carriageway, crash barrier 2*0.5m.Overbridge bridge length 225.5m, using on cast-in-situ box girder
Portion's structure.Road surface uses cement concrete pavement structure.Project content includes that the main bridge in across bearing main road and two sides are led the way part.It is main
Bridge pier K0+053.8~K0+287.3, bridge collapse use: 4*18.5m (first)+(30+33.5+30) m (second)+3*22m
(third connection), overall length of bridge 233.5m.Category of roads is factory-in road, and design speed per hour is 20Km/h.
The present embodiment pile foundation of bridge pier uses Punching Borehole Cast-in-place Concrete Pile, and by Design of Rock Socketed Pile, stake diameter divides φ 120cm, φ 140cm, φ
Tri- kinds of 160cm (abutment uses φ 120cm drilled pile, and bridge pier uses φ 140cm, φ 160cm drilled pile).0 axis, 10 axis are abutment
Drilled pile, 0 axis abutment drilled pile are 2, and 10 axis drilled piles are 4；1 axis to 9 axis is Bored Piles, and each bridge pier is 2
Root, longest designing pile length about 30.9m.
As shown in Figure 1, the karst cave treatment structure for pile foundation of bridge pier different height of the utility model includes wearing from ground
To the outer steel pile casting 10 and outer interior steel pile casting steel pile casting 10 coaxial arrangement and be located in outer steel pile casting 10 of Upper Plate of Karst Cave
20, the periphery of the outer steel pile casting 10 is embedded with aperture retaining wall 30, and the built-in length of the aperture retaining wall 30 is 2m, aperture shield
Wall by diameter is 2.7m, the steel pile casting that wall thickness is 10mm is constituted.Height h >=4.0m of solution cavity handled by the utility model.
Interior steel pile casting 20 in the utility model passes through solution cavity and wears to solution cavity bottom plate, and the bottom end of the outer steel pile casting 10 is worn
To Upper Plate of Karst Cave 0.2m, the bottom end of the interior steel pile casting 20 is worn to solution cavity bottom plate 1m.
In addition, filling in the solution cavity, outside interior steel pile casting by the solution cavity filled layer being made of clay, slabstone and bagged cement
40.Gap between the outer steel pile casting 10 and interior steel pile casting 20 is filled with the packing layer 50 being made of C30 Underwater Concrete.
In the following, as follows using the concrete construction method of the karst cave treatment structure of the utility model:
One, outer 10 vibration-sunk of steel pile casting, first smooth location, built-in length 2m, diameter 2.7m, wall thickness 10mm
Aperture retaining wall steel pile casting 30.
Two, block stamp punching presses normal punching technology punching using block stamp, more than punching to Upper Plate of Karst Cave, to Upper Plate of Karst Cave
Thickness is rushed in solution cavity rimrock layer less than 1m, mentions hammer and portal.
Three, alternately operating until outer steel pile casting 10 sink down into Upper Plate of Karst Cave 0.2m, using DZ90 vibration hammer auxiliary carry out down
It is heavy, pile monkey can be used when vibration-sunk is had any problem and be blown to sinking (outer steel pile casting top solder fashioned iron stress frame).
Four, it mentions hammer to portal, throwing bagged cement and wire netting fragment, small stroke block stamp mix, and mention hammer and portal, and stand observation
24 hours, Upper Plate of Karst Cave was uneven, and throwing bagged cement and wire netting fragment are mainly used for blocking outer steel pile casting 10 and solution cavity
Gap between top plate, to prevent external drift sand from entering in outer steel pile casting 10.
Five, small bore wears out Upper Plate of Karst Cave, fills up solution cavity by small bore water filling, water filling is filled up solution cavity observation and all gone well
Backlash punctures broken Upper Plate of Karst Cave, and main function is the differential water pressures and detection solution cavity size eliminated inside and outside solution cavity, to prevent punching big
Area, which pierces through Upper Plate of Karst Cave and forms moment solution cavity and inhale, to flow, and causes immense pressure inside and outside outer steel pile casting poor, and then casing is caused to become
Shape and periphery layer of sand collapse.Aperture moisturizing filling solution cavity is opened using geological prospecting brill in advance, high degree slows down outer steel pile casting
Head is lost speed, avoids moment from forming immense pressure inside and outside casing poor.It takes in the measures balance external steel pile casting such as moisturizing simultaneously
External pressure.
Six, the small stroke of block stamp is gently hammered into shape, slow puncture breaks Upper Plate of Karst Cave or drill Upper Plate of Karst Cave, to prevent outer steel pile casting 10 from leaking
Slurry, uses diameter for the slow punching of small stroke of 0.5~1m of block stamp of 2.1m, restores normal punching speed after entering rock stratum 0.5m
Degree.Geologic information is compareed, gradually slows down punching speed when about 0.5m when close to Upper Plate of Karst Cave ground, prevents the wink of breakdown top plate
Between block stamp fall through to wirerope generate enormous impact force and be broken hammer.1.5m is less than for thickness or has the molten of crack and interlayer
Hole top plate, drilled using churning driven or the every 40cm spacing in periphery in outer steel pile casting along top plate uniformly drill after light block stamp hit
It wears.
Seven, it mentions hammer to portal, hang into interior steel pile casting 20, the positioning of interior steel pile casting 20 is using the shape marked on outer steel pile casting
Formula: before mentioning hammer and portalling, determining hole center, and make a mark on outer steel pile casting by the way of hanging cross hairs, according to
The label and interior steel pile casting diameter made determine the horizontal distance between interior steel pile casting and mark point, mark spot welding in outer steel pile casting
Locating steel frame is connect, after interior steel pile casting is in place, backfill clay, slabstone and bagged cement are filled into solution cavity top, punching is arrived again later
Solution cavity bottom, it is repeated multiple times until determining that solution cavity has been filled with.
Eight, the punching of block stamp pinch shock filler enters solution cavity bottom plate 1m.
Nine, interior steel pile casting 20 sinks down into solution cavity bottom plate and enters bottom plate 1m.
Ten, after interior steel pile casting 20 sinks in place, diameter is used instead as 1.8m and rushes pile monkey by normal process punching to bridge pier stake
The designed elevation of base.
The diameter of the outer steel pile casting of the utility model is 2500mm, and wall thickness 15mm, the diameter of interior steel pile casting is 2200mm, wall
Thick 10mm.Gap between inside and outside steel pile casting is filled using C30 Underwater Concrete, is filled from Upper Plate of Karst Cave face to cushion cap base surface.
Outer steel pile casting casing used when being using punching pile driving construction achievees the purpose that save material.
Wherein, the consolidation thickness that throwing bagged cement and wire netting fragment are formed is 1.5m.Piece in solution cavity filled layer 40
Stone and clay amount are calculated by the area of a circle of 1.5 times of a height of diameters in hole multiplied by the cylindrical body that hole height is formed, slabstone, clay and packed water
The ratio of mud is 6:3:1.
In addition, in the present invention, the pile foundation solution cavity sequence of construction of the same cushion cap is that first construction Upper Plate of Karst Cave is thick
Pile foundation, then the pile foundation that Upper Plate of Karst Cave of constructing is thin.
Wherein, the cylinder that the slabstone in solution cavity and clay amount are formed by the area of a circle of 1.5 times of a height of diameters in hole multiplied by hole height
Body calculates, and the ratio of slabstone, clay and bagged cement is 6:3:1, then the project amount of slabstone is 4015.23m3, the engineering of clay
Amount is 2007.61m3, the project amount of bagged cement is 669.21m3.The project amount of solution cavity slabstone, clay and bagged cement is temporary
Calmly, it is settled accounts when clearing by the project amount actually occurred.
Gap between inside and outside steel pile casting is filled using C30 Underwater Concrete, is filled from Upper Plate of Karst Cave face to cushion cap base surface,
Its project amount is 101.67m3.Throwing bagged cement reaches burying depth 1.5m in outer steel pile casting, and bagged cement amount is 55.2t.
The karst cave treatment structure for pile foundation of bridge pier different height of the utility model uses the structure type of double steel pile castings,
And the packing layer 50 being made of C30 Underwater Concrete is filled in the gap between outer steel pile casting 10 and interior steel pile casting 20, avoids inside and outside steel
Excessive gap is generated between casing；Aperture retaining wall 30 is buried in the periphery of outer steel pile casting 10, prevents drilling accident, prevents and collapse
It collapses；The solution cavity filled layer 40 being made of clay, slabstone and bagged cement is filled in solution cavity, increases bearing capacity, is reinforced in solution cavity
The soft soil of the deficient consolidation of original filling, the collapsing of reduction periphery layer of sand and bottom spillage and so on.In outer steel pile casting 10
When sinking down into Upper Plate of Karst Cave, throwing bagged cement and wire netting fragment, between blocking between outer steel pile casting and Upper Plate of Karst Cave
Gap, to prevent external drift sand from entering in casing.The karst cave treatment structure knot for pile foundation of bridge pier different height of the utility model
Structure is simple, easy to operate, it is ensured that pile foundation of bridge pier smoothly completes, construction safety.
Above disclosed is only several preferred embodiments of the utility model, cannot limit this reality certainly with this
With novel interest field, therefore equivalent variations made according to the claim of the utility model, still belong to the utility model and is covered
Range.
Claims (5)
1. a kind of karst cave treatment structure for pile foundation of bridge pier different height, it is characterised in that: including wearing from ground to solution cavity top
The outer steel pile casting of plate, the interior steel pile casting for being coaxially disposed and being located in outer steel pile casting with the outer steel pile casting, the interior steel pile casting are worn
It crosses solution cavity and wears to solution cavity bottom plate；
It fills in the solution cavity, outside interior steel pile casting by the solution cavity filled layer being made of clay, slabstone and bagged cement；
The periphery of the outer steel pile casting is embedded with aperture retaining wall；
Gap between the outer steel pile casting and interior steel pile casting is filled with the packing layer being made of C30 Underwater Concrete.
2. the karst cave treatment structure according to claim 1 for pile foundation of bridge pier different height, it is characterised in that: the hole
The built-in length of mouthful retaining wall is 2m, which by diameter is 2.7m, the steel pile casting that wall thickness is 10mm is constituted.
3. the karst cave treatment structure according to claim 1 for pile foundation of bridge pier different height, it is characterised in that: described outer
It wears to Upper Plate of Karst Cave 0.2m the bottom end of steel pile casting；It wears to solution cavity bottom plate 1m the bottom end of the interior steel pile casting.
4. the karst cave treatment structure according to claim 1 for pile foundation of bridge pier different height, it is characterised in that: described outer
The diameter of steel pile casting is 2500mm, and wall thickness 15mm, the diameter of the interior steel pile casting is 2200mm, wall thickness 10mm.
5. the karst cave treatment structure according to claim 1 for pile foundation of bridge pier different height, it is characterised in that: solution cavity
Height h >=4.0m.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821016741.9U CN208563317U (en) | 2018-06-28 | 2018-06-28 | A kind of karst cave treatment structure for pile foundation of bridge pier different height |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821016741.9U CN208563317U (en) | 2018-06-28 | 2018-06-28 | A kind of karst cave treatment structure for pile foundation of bridge pier different height |
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| Publication Number | Publication Date |
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| CN208563317U true CN208563317U (en) | 2019-03-01 |
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| CN201821016741.9U Expired - Fee Related CN208563317U (en) | 2018-06-28 | 2018-06-28 | A kind of karst cave treatment structure for pile foundation of bridge pier different height |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605434A (en) * | 2021-09-06 | 2021-11-05 | 中铁二十二局集团第二工程有限公司 | Bridge pile foundation construction method for high-speed railway karst |
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2018
- 2018-06-28 CN CN201821016741.9U patent/CN208563317U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113605434A (en) * | 2021-09-06 | 2021-11-05 | 中铁二十二局集团第二工程有限公司 | Bridge pile foundation construction method for high-speed railway karst |
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Granted publication date: 20190301 |