CN108978642A - A kind of double steel pile castings add throwing clay slabstone to handle pile foundation of bridge pier solution cavity construction method - Google Patents
A kind of double steel pile castings add throwing clay slabstone to handle pile foundation of bridge pier solution cavity construction method Download PDFInfo
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- CN108978642A CN108978642A CN201810684229.XA CN201810684229A CN108978642A CN 108978642 A CN108978642 A CN 108978642A CN 201810684229 A CN201810684229 A CN 201810684229A CN 108978642 A CN108978642 A CN 108978642A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
- E02D5/38—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/66—Mould-pipes or other moulds
- E02D5/665—Mould-pipes or other moulds for making piles
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- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
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- General Engineering & Computer Science (AREA)
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- Bridges Or Land Bridges (AREA)
Abstract
The invention discloses a kind of double steel pile castings, and throwing clay slabstone to be added to handle pile foundation of bridge pier solution cavity construction method, including outer steel pile casting vibration-sunk, block stamp punching, alternately operating is up to outer sinking steel protecting canister to Upper Plate of Karst Cave, hammer is mentioned to portal, throwing bagged cement and wire netting fragment, small bore wears out Upper Plate of Karst Cave, solution cavity is filled up by small bore water filling, the small stroke of block stamp is gently hammered into shape, it is slow to puncture broken Upper Plate of Karst Cave or drill Upper Plate of Karst Cave, hammer is mentioned to portal, backfill clay, slabstone and bagged cement, it is filled into solution cavity top, later again punching to solution cavity bottom, it is repeated multiple times until determining that solution cavity has been filled with, block stamp pinch shock filler punching enters solution cavity bottom plate, interior sinking steel protecting canister to solution cavity bottom plate enters bottom plate 1m, designed elevation of the continuation punching to pile foundation of bridge pier.Method of the invention has the advantages that technical feasibility, economical rationality, simple process, easy to operate, construction safety, meets the developing direction of modern engineering technology, has biggish promotion prospect.
Description
Technical field
The present invention relates to the technical fields of municipal construction more particularly to a kind of double steel pile castings, and throwing clay slabstone to be added to handle bridge
Pier pile foundation solution cavity construction method.
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 double steel pile castings, and throwing clay slabstone to be added to handle pile foundation of bridge pier solution cavity construction method in technology.
Summary of the invention
Based on the above the deficiencies in the prior art, technical problem solved by the invention is to provide a kind of double steel pile castings and adds throwing
Fill out clay slabstone processing pile foundation of bridge pier solution cavity construction method, this method technical feasibility, economical rationality, simple process, it is easy to operate,
Construction safety.
In order to solve the above technical problem, the present invention provides a kind of double steel pile castings, and throwing clay slabstone to be added to handle pile foundation of bridge pier
Solution cavity construction method, comprising the following steps:
The following steps are included:
One, outer steel pile casting vibration-sunk；
Two, block stamp punching；
Three, alternately operating is up to outer sinking steel protecting canister to Upper Plate of Karst Cave 0.2m；
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；
Five, small bore wears out Upper Plate of Karst Cave, fills up solution cavity by small bore water filling；
Six, the small stroke of block stamp is gently hammered into shape, slow breakdown breaks Upper Plate of Karst Cave or drills Upper Plate of Karst Cave；
Seven, it mentions hammer to portal, hangs into interior steel pile casting, backfill clay, slabstone and bagged cement, be filled into solution cavity top, later
Punching is repeated multiple times until determining that solution cavity has been filled with to solution cavity bottom again；
Eight, the punching of block stamp pinch shock filler enters solution cavity bottom plate 1m；
Nine, interior sinking steel protecting canister to solution cavity bottom plate enters bottom plate 1m.
Ten, designed elevation of the continuation punching to pile foundation of bridge pier.
Wherein, casing used when the outer steel pile casting is using punching pile driving construction, the diameter of outer steel pile casting are 2500mm,
Wall thickness 15mm, the diameter of interior steel pile casting are 2200mm, wall thickness 10mm；
Gap between the interior steel pile casting and outer steel pile casting is filled using C30 Underwater Concrete, from Upper Plate of Karst Cave face fill to
Cushion cap base surface；
When the outer steel pile casting enters Upper Plate of Karst Cave 0.2m, for the pile foundation on riverbank, outer steel pile casting is higher by original ground 0.5m,
For the pile foundation of river levee, outer steel pile casting is higher by one-shot job steel platform 0.3m.
In the step 4: the consolidation thickness that the throwing bagged cement and wire netting fragment are formed is 1.5m.
In the step 5: water filling fills up solution cavity observation and all goes well the broken Upper Plate of Karst Cave of backlash breakdown, fills the water for eliminating
Differential water pressures and detection solution cavity size inside and outside solution cavity.
In the step 6: being less than 1.5m for thickness or have the Upper Plate of Karst Cave of crack and interlayer, 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 breakdown.
In the step 7: the cylindrical body that throwing slabstone and clay amount are formed with the area of a circle of a height of diameter in hole multiplied by hole height
1.5 times of calculating, the ratio of slabstone, clay and bagged cement is 6:3:1；
Throwing bagged cement reaches burying depth 1.5m in outer steel pile casting.
In the present invention, the pile foundation solution cavity sequence of construction of the same cushion cap is the pile foundation of first construction Upper Plate of Karst Cave thickness, then applies
The thin pile foundation of work Upper Plate of Karst Cave.
By upper, double steel pile castings of the invention add throwing clay slabstone processing pile foundation of bridge pier solution cavity construction method in outer steel pile casting
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；Upper Plate of Karst Cave is worn out using small bore, solution cavity is filled up by small bore water filling, with
The differential water pressures and detection solution cavity size inside and outside solution cavity are eliminated, the measures balance external steel pile casting external and internal pressure such as moisturizing, very great Cheng are taken
Reduced on degree outer steel pile casting deform, the collapsing of periphery layer of sand and bottom spillage.Double steel pile castings of the invention add
Throwing clay slabstone handle pile foundation of bridge pier solution cavity construction method have technical feasibility, economical rationality, simple process, it is easy to operate,
The advantages of construction safety, meets the developing direction of modern engineering technology, has biggish promotion prospect.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And it can be implemented in accordance with the contents of the specification, and in order to allow above and other objects, features and advantages of the invention can
It is clearer and more comprehensible, below in conjunction with preferred embodiment, and cooperates attached drawing, detailed description are as follows.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, the attached drawing to embodiment is simply situated between below
It continues.
Fig. 1 is the process flow that double steel pile castings of the invention add throwing clay slabstone processing pile foundation of bridge pier solution cavity construction method
Figure；
Fig. 2 is the outer steel pile casting vibration-sunk stage schematic diagram of the preferred embodiment of the present invention；
Fig. 3 is the outer steel pile casting vibration-sunk schematic diagram in place of the preferred embodiment of the present invention；
Fig. 4 is the schematic diagram that bottom stands bonding course in the outer steel pile casting of the preferred embodiment of the present invention；
Fig. 5 is the small bore conduit water filling filling schematic diagram of the preferred embodiment of the present invention；
Fig. 6 is that Upper Plate of Karst Cave schematic diagram is worn out in the block stamp impact of the preferred embodiment of the present invention；
Fig. 7 be the preferred embodiment of the present invention backfill clay and slabstone block stamp shock-diffusion after schematic diagram；
Fig. 8 is that the block stamp punching of the preferred embodiment of the present invention enters solution cavity bottom plate 1m, interior sinking steel protecting canister to solution cavity bottom plate
Lower 1m schematic diagram；
Fig. 9 is the block stamp punching extremely design stake bottom absolute altitude schematic diagram of the preferred embodiment of the present invention；
Figure 10 is 5#, 6# pier arrangement of pile foundation schematic diagram in specific embodiments of the present invention.
Specific embodiment
The embodiment of the invention will now be described in detail with reference to the accompanying drawings, and as part of this specification passes through
Embodiment illustrates the principle of the present invention, and other aspects of the present invention, feature and its advantage will become by the detailed description
It is very clear.In the attached drawing of institute's reference, the same or similar component is indicated using identical drawing reference numeral in different figures.
Embodiment
The embodiment of the present invention is located at Guangzhou Huadu District Xin Jie daling village, across the heavenly steed river bridge work in Huadu District Industrial Avenue
Journey is about 3674 meters to the east of wide aloof from politics and material pursuits speed west from the main road Hua Gang, by successively extra large across the road Li Hong, heavenly steed river, planning west to east
River road.Project content includes that across heavenly steed He Zhuqiao and two sides are led the way part, and main bridge pier K1+214.490~k1+734.490 draws
Road divides thing side to lead the way, and lead the way pile No. K1+734.490~K1+845 in east side, and lead the way K1+065~K1+214.490 in west side.Road
Grade is major urban arterial highway, designs speed per hour 40km/h.Heavenly steed river is required without navigation.Starting point is No. 0 abutment, and design stake number is 14
Root, pile No. 1~14, left width design stake diameter is 1300mm, and right width design stake diameter is 1500mm；Terminal is No. 14 abutments, designs stake
Number is 16, pile No. 1~16, and design stake diameter is 1300mm.Intermediate to design 13 bridge piers altogether, bridge pier number is No. 1~No. 13, every pier
Design stake number 4~10 differs, and double Pier Design stake diameters are 1600mm, and three Pier Design stake diameters are 1800mm.
1. since the scar fluctuating that place can make supporting course is very big, and karsts developing area, use bored concrete pile foundation.
2. place solution cavity, soil cave are developed, during drilling construction, once occurred what small-scale terrestrial collapsed in the position of No. 5 piers
Phenomenon is handled solution cavity, soil cave before pile foundation construction, and the method for cement injection mortar or cement slurry is taken to carry out at filling
There are the geological disasters such as karst ground subsidence, jeopardize construction equipment and the safety of construction personnel in reason, prevention.
3. at No. 5 stake positions of No. 5 piers, in probing discovery have be compared with cavern this engineering difficult point.
Left 6~1,6~2,6~5,6~6 designing pile length 30.9m, right 6~3,6~4,6~7,6~8 designing pile lengths
27.4m.The steel platform that the operation platform of pile foundation in water plinth uses steel-pipe pile+Bailey beam+I-steel to set up, steel platform design are divided into
Two regions: drilling construction area and material area, steel platform are attached with bank using steel suspension bridge.
As shown in Figure 10, the present invention is handled for the pile foundation cavity of 5#, 6# pier, and each pier position respectively has pile foundation 8, stake diameter
For Ф 180cm, totally 564.4 linear meter(lin.m.).5#, 6# pier Pile Foundations Design end hole condition are: reaching design stake bottom absolute altitude and enter complete micro-
Decomposed rock is no less than 2 times of stake diameters.
Since 5# pier is located at heavenly steed river river levee slope foot, 6# pier is located at heavenly steed korneforos, and position is special.And at the pile foundation of pier position lower part
In karsts developing area area, 5# pier solution cavity is up to 4.2~11m, and 6# pier solution cavity is up to 5.6~11.5m, is more than the solution cavity of 4m to height
Design adds the scheme of clay, slabstone processing pile foundation solution cavity using double steel pile castings.Solution principle are as follows: steel pile casting effect in outside prevents molten
Hole top plate causes large area to be caved in when puncturing, and interior steel pile casting effect is the pile protection of solution cavity section.Stake can be effectively reduced in the program
The filling of base solution cavity causes layer of sand to be lost the risk for collapsing and causing river levee collapsing and steel platform unstability.According to the cavern area that first constructs
The principle of pile foundation, the left width of 5# pier are first constructed 5-5# pile foundation, and the right width of 5# pier is first constructed 5-4# pile foundation, and the left width of 6# pier is first constructed 6-5#
Base, the right width of 6# pier are first constructed 6-6# pile foundation.
Pile foundation construction process classification schedule
| Technology category | Pile foundation stake position | Remarks |
| Common drought stake | 5-1、5-2、5-3 | |
| Pile foundation in water | 8 pile of 6# pier | Steel platform need to be set up |
| Double steel pile casting solution cavities | 5-4、5-5、5-6、5-8、6-5、6-6 | 6-5,6-6 need to set up steel platform |
| Single steel pile casting solution cavity | 6-1、6-2、6-7、6-8 | Steel platform need to be set up |
As shown in Figures 1 to 9, double steel pile castings of the invention add throwing clay slabstone to handle pile foundation of bridge pier solution cavity construction method
The following steps are included:
One, outer steel pile casting vibration-sunk, first smooth location, built-in length 2m, diameter 2.7m, wall thickness are 10mm's
Aperture retaining wall steel pile casting.
Two, block stamp punching presses normal punching technology punching using block stamp, more than punching to Upper Plate of Karst Cave, to the top of solution cavity
Plate thickness is rushed in solution cavity rimrock layer less than 1m, mentions hammer and portal.
Three, alternately operating is sunk up to outer sinking steel protecting canister to Upper Plate of Karst Cave 0.2m using DZ90 vibration hammer auxiliary,
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 and solution cavity top
Gap between plate, to prevent external drift sand from entering in outer steel pile casting.
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, prevents the big face of punching
Product, 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 deform
And periphery layer of sand collapses.Aperture moisturizing filling solution cavity is opened using geological prospecting brill in advance, high degree slows down outer steel pile casting water
Head is lost speed, avoids moment from forming immense pressure inside and outside casing poor.It takes inside and outside the measures balance external steel pile casting such as moisturizing simultaneously
Pressure.The method largely reduces the deformation of outer steel pile casting, the collapsing of periphery layer of sand and bottom spillage.
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 spillage,
It 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.
Geologic information is compareed, gradually slows down punching speed when about 0.5m when close to Upper Plate of Karst Cave ground, prevents the moment of breakdown top plate
Block stamp falls through to be generated enormous impact force and is broken hammer to wirerope.1.5m is less than for thickness or has the solution cavity of crack and interlayer
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, the positioning of interior steel pile casting is using the form marked on outer steel pile casting:
Before mentioning hammer and portalling, hole center is determined by the way of hanging cross hairs, and make a mark on outer steel pile casting, according to making
Label and interior steel pile casting diameter, determine in horizontal distance between steel pile casting and mark point, it is fixed in the label spot welding of outer steel pile casting
Position steelframe, after interior steel pile casting is in place, backfill clay, slabstone and bagged cement are filled into solution cavity top, later again punching to 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 sinking steel protecting canister to solution cavity bottom plate enters bottom plate 1m.
Ten, after interior sinking steel protecting canister is in place, diameter is used instead as 1.8m and rushes pile monkey by normal process punching to pile foundation of bridge pier
Designed elevation.
Double steel pile castings of the invention include outer steel pile casting and interior steel pile casting, wherein the diameter of outer steel pile casting is 2500mm, wall
Thick 15mm, the diameter of interior steel pile casting are 2200mm, wall thickness 10mm.Gap between inside and outside steel pile casting is filled using C30 Underwater Concrete,
It fills from Upper Plate of Karst Cave face to cushion cap base surface.Outer steel pile casting enters Upper Plate of Karst Cave 0.2m, for riverbank (the 5 of the present embodiment
Axis) pile foundation, be higher by original ground 0.5m, for the pile foundation of river levee (6 axis of the present embodiment), be higher by one-shot job steel platform (because
In the pile foundation of river levee construction, one-shot job steel platform is set) 0.3m.Outer steel pile casting shield used when being using punching pile driving construction
Cylinder achievees the purpose that save material.
In the step 4, the consolidation thickness that throwing bagged cement and wire netting fragment are formed is 1.5m.
In the step 7, cylindrical body that throwing slabstone and clay amount are formed with the area of a circle of a height of diameter in hole multiplied by hole height
1.5 times of calculating, the ratio of slabstone, clay and bagged cement is 6:3:1；It is deep to reach burial for throwing bagged cement in outer steel pile casting
Spend 1.5m.
In addition, in the present invention, the pile foundation solution cavity sequence of construction of the same cushion cap is the pile foundation of first construction Upper Plate of Karst Cave thickness,
The thin pile foundation of Upper Plate of Karst Cave of constructing again.
Solution cavity distribution situation list
5 axis, 6 axis bridge pier part pile foundation karst cave treatment lists
Wherein, the cylindrical body that the slabstone in solution cavity and clay amount are formed with the area of a circle of a height of diameter in hole multiplied by hole height
1.5 times of calculating, the ratio of slabstone, clay and bagged cement are 6:3:1, then the project amount of slabstone is 4015.23m3, the work of clay
Journey 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.
Outer steel pile casting enters Upper Plate of Karst Cave 0.2m, for 5 axis pile foundations, is higher by original ground 0.5m, for 6 axis pile foundations, is higher by
Operation steel platform 0.3m.Changing the increased outer steel pile casting project amount of 5 axis, 6 axis pile foundations is 118.994t.
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.
Karst cave treatment in pile foundation construction confirms the engineering design by understanding the geological condition in engineering location in detail
Pile foundation type the position that solution cavity occurs is grasped, and substantially infer it according to pile foundation stake position geology, pile foundation type, hydrological data
Range, filling situation and property, formulate suitable arrangement and method for construction and construction technology safeguard.
The principle of karst cave treatment mainly includes following aspect in pile foundation construction:
(1) to ensure the detailed exploration of every pile, to select corresponding arrangement and method for construction to provide foundation；
(2) soil test, the physical parameters such as detection bulk density, porosity, water content are carried out to the filler of processing solution cavity；
(3) corresponding karst cave treatment scheme and forming hole method will be designed to every pile.
Double steel pile castings of the invention add throwing clay slabstone processing pile foundation of bridge pier solution cavity construction method in outer sinking steel protecting canister
When to Upper Plate of Karst Cave, throwing bagged cement and wire netting fragment, for blocking the gap between outer steel pile casting and Upper Plate of Karst Cave, with
Prevent external drift sand from entering in casing；Upper Plate of Karst Cave is worn out using small bore, solution cavity is filled up by small bore water filling, it is molten to eliminate
Differential water pressures and detection solution cavity size inside and outside hole, take the measures balance external steel pile casting external and internal pressure such as moisturizing, largely subtract
Few outer steel pile casting deformation, the collapsing of periphery layer of sand and bottom spillage and so on.Double steel pile castings of the invention add throwing glutinous
Native slabstone processing pile foundation of bridge pier solution cavity construction method has technical feasibility, economical rationality, simple process, easy to operate, construction peace
Full advantage meets the developing direction of modern engineering technology, has biggish promotion prospect.
The above is a preferred embodiment of the present invention, cannot limit the right model of the present invention with this certainly
It encloses, it is noted that for those skilled in the art, without departing from the principle of the present invention, may be used also
To make several improvement and variation, these, which improve and change, is also considered as protection scope of the present invention.
Claims (7)
1. a kind of double steel pile castings add throwing clay slabstone to handle pile foundation of bridge pier solution cavity construction method, it is characterised in that: including following
Step:
One, outer steel pile casting vibration-sunk；
Two, block stamp punching；
Three, alternately operating is up to outer sinking steel protecting canister to Upper Plate of Karst Cave 0.2m；
Four, it mentions hammer to portal, throwing bagged cement and wire netting fragment, small stroke block stamp mix, and mention hammer and portal, and it is small to stand observation 24
When；
Five, small bore wears out Upper Plate of Karst Cave, fills up solution cavity by small bore water filling；
Six, the small stroke of block stamp is gently hammered into shape, slow breakdown breaks Upper Plate of Karst Cave or drills Upper Plate of Karst Cave；
Seven, it mentions hammer to portal, hangs into interior steel pile casting, backfill clay, slabstone and bagged cement, be filled into solution cavity top, later again
Punching is repeated multiple times until determining that solution cavity has been filled with to solution cavity bottom；
Eight, the punching of block stamp pinch shock filler enters solution cavity bottom plate 1m；
Nine, interior sinking steel protecting canister to solution cavity bottom plate enters bottom plate 1m.
Ten, designed elevation of the continuation punching to pile foundation of bridge pier.
2. double steel pile castings as described in claim 1 add throwing clay slabstone to handle pile foundation of bridge pier solution cavity construction method, feature
Be: outer steel pile casting casing used when being using punching pile driving construction, the diameter of outer steel pile casting are 2500mm, wall thickness
15mm, the diameter of interior steel pile casting are 2200mm, wall thickness 10mm；
Gap between the interior steel pile casting and outer steel pile casting is filled using C30 Underwater Concrete, is filled from Upper Plate of Karst Cave face to cushion cap
Base surface；
When the outer steel pile casting enters Upper Plate of Karst Cave 0.2m, for the pile foundation on riverbank, outer steel pile casting is higher by original ground 0.5m, for
The pile foundation of river levee, outer steel pile casting are higher by one-shot job steel platform 0.3m.
3. double steel pile castings as described in claim 1 add throwing clay slabstone to handle pile foundation of bridge pier solution cavity construction method, feature
Be: in the step 4: the consolidation thickness that the throwing bagged cement and wire netting fragment are formed is 1.5m.
4. double steel pile castings as described in claim 1 add throwing clay slabstone to handle pile foundation of bridge pier solution cavity construction method, feature
Be: in the step 5: water filling fills up solution cavity observation and all goes well the broken Upper Plate of Karst Cave of backlash breakdown, fills the water for eliminating solution cavity
Inside and outside differential water pressures and detection solution cavity size.
5. double steel pile castings as described in claim 1 add throwing clay slabstone to handle pile foundation of bridge pier solution cavity construction method, feature
Be: in the step 6: 1.5m is less than for thickness or has the Upper Plate of Karst Cave of crack and interlayer, drilled using churning driven or
In outer steel pile casting along the every 40cm spacing in the periphery of top plate uniformly drill after light block stamp puncture.
6. double steel pile castings as described in claim 1 add throwing clay slabstone to handle pile foundation of bridge pier solution cavity construction method, feature
It is: in the step 7:
1.5 times of calculating of the cylindrical body that throwing slabstone and clay amount are formed with the area of a circle of a height of diameter in hole multiplied by hole height, slabstone,
The ratio of clay and bagged cement is 6:3:1.
7. double steel pile castings as described in claim 1 add throwing clay slabstone to handle pile foundation of bridge pier solution cavity construction method, feature
Be: the pile foundation solution cavity sequence of construction of the same cushion cap is the pile foundation of Upper Plate of Karst Cave thickness of first constructing, then Upper Plate of Karst Cave of constructing is thin
Pile foundation.
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| CN110055948A (en) * | 2019-04-29 | 2019-07-26 | 华东交通大学 | A kind of big Treatment Methods of Karst Foundation of depth and device |
| CN110512594A (en) * | 2019-08-20 | 2019-11-29 | 北京建材地质工程有限公司 | The simple and easy method of churning driven opportunity cavity pore-forming |
| CN111021949A (en) * | 2019-10-28 | 2020-04-17 | 中国一冶集团有限公司 | Drilling method for improving impact drilling on sand layer and mud rock layer |
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| CN111021949A (en) * | 2019-10-28 | 2020-04-17 | 中国一冶集团有限公司 | Drilling method for improving impact drilling on sand layer and mud rock layer |
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| CN114934538A (en) * | 2022-04-13 | 2022-08-23 | 中铁三局集团广东建设工程有限公司 | Karst bridge pile foundation construction process |
| CN115110520A (en) * | 2022-04-27 | 2022-09-27 | 中国建筑第七工程局有限公司 | Construction method of bridge pile foundation on highway |
| CN115162319A (en) * | 2022-07-25 | 2022-10-11 | 福建冶地恒元建设有限公司 | Water plugging treatment device and method for seepage holes in underground karst cave wall in cast-in-place pile construction |
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