CN108411928A - One kind passing through multilayer karst cave ultra-deep and large diameter pile foundation boring method - Google Patents
One kind passing through multilayer karst cave ultra-deep and large diameter pile foundation boring method Download PDFInfo
- Publication number
- CN108411928A CN108411928A CN201810239887.8A CN201810239887A CN108411928A CN 108411928 A CN108411928 A CN 108411928A CN 201810239887 A CN201810239887 A CN 201810239887A CN 108411928 A CN108411928 A CN 108411928A
- Authority
- CN
- China
- Prior art keywords
- steel pile
- pile casting
- drilling
- layer
- solution cavity
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 46
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 205
- 239000010959 steel Substances 0.000 claims abstract description 205
- 238000005266 casting Methods 0.000 claims abstract description 199
- 238000005553 drilling Methods 0.000 claims abstract description 132
- 238000010276 construction Methods 0.000 claims abstract description 53
- 238000012546 transfer Methods 0.000 claims abstract description 32
- 238000013461 design Methods 0.000 claims abstract description 27
- 231100000241 scar Toxicity 0.000 claims abstract description 27
- 239000002689 soil Substances 0.000 claims description 16
- 238000004080 punching Methods 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 claims 1
- 239000011435 rock Substances 0.000 description 6
- 241001074085 Scophthalmus aquosus Species 0.000 description 5
- 238000012360 testing method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 230000010412 perfusion Effects 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/10—Deep foundations
- E02D27/12—Pile foundations
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Paleontology (AREA)
- Geochemistry & Mineralogy (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
Abstract
The invention discloses one kind passing through multilayer karst cave ultra-deep and large diameter pile foundation boring method, includes the following steps：Determine solution cavity parameter and earthing layer thickness during pile foundation construction；Determine decentralization steel pile casting parameter；Drilling integral diameters at different levels are determined according to steel pile casting diameters at different levels principle corresponding with drilling integral diameters at different levels；Bore diameters at different levels in lithostratigraphy reach determining drilling integral diameters at different levels；Drilling construction is carried out, until entering overburden layer scar below；It transfers on work steel pile casting to overburden layer scar below；Start overburden layer bottom absolute altitude to the lithostratigraphy drilling construction between first layer solution cavity floor level：The second level steel pile casting of corresponding first layer solution cavity is transferred to the bottom plate scar below of first layer solution cavity；Corresponding steel pile casting at different levels is transferred successively；It is drilled down into, after creeping into design pile foundation bottom hole absolute altitude, and bottom hole is polished, terminates drilling.This method is efficient.
Description
Technical field
The present invention relates to large-diameter pile foundation boring methods, and it is big to pass through multilayer karst cave ultra-deep more specifically to one kind
Diameter pile foundation boring method.
Background technology
With the continuous development of the scale of construction and construction technology, (depth reaches 90m or more to ultra-deep and large diameter, and diameter reaches
To 2.5m or more) pile foundation applied by more and more in all kinds of engineerings, and Karst Geological Landscape be distributed at home it is extremely wide,
Karst area ultra-deep and large diameter pile foundation have into rock compared with deep, rock strength is high, drilling when pass through the difficult points such as multilayer karst cave.Mesh
The preceding such pile foundation in the country is often impact drill construction with construction method, and karst cave treatment method is to fill out punching repeatedly, but the method is constructed
Progress extremely slowly, string-like or large and medium-sized karst cave treatment effect it is humble.
Invention content
The purpose of the present invention is to overcome the disadvantages of the prior art, provides the efficient, short construction period of one kind and can guarantee
Construction quality passes through multilayer karst cave ultra-deep and large diameter pile foundation boring method.
The present invention is achieved through the following technical solutions：
One kind of the present invention passing through multilayer karst cave ultra-deep and large diameter pile foundation boring method, includes the following steps：
(1) according to the related geology prospecting report of pile foundation, position, the solution cavity top of solution cavity during pile foundation construction are determined
The distribution number of plies and earthing layer thickness of plate and floor level, type of cavern, solution cavity volume, solution cavity on facade；
(2) it determines decentralization steel pile casting parameter, is as follows：
(a) according to the solution cavity number of plies, determination need to transfer the diameter of the number of plies and each layer steel pile casting of steel pile casting, steel pile casting to be transferred
The number of plies determine that method is：Every layer of solution cavity transfers a steel pile casting, and work steel pile casting is arranged when churning driven construction, and work steel
It is i that casing, which passes through overburden layer, the solution cavity number of plies, then shared i+1 grades of steel pile casting, steel pile casting be named as successively from outside to inside T1, T2,
T3 ... Ti, Ti+1, wherein T1 are work steel pile casting, and Ti+1 is the steel pile casting of corresponding i-th layer of solution cavity, corresponding with steel pile castings at different levels
Steel pile casting diameter is named as d1, d2, d3 ... di, di+1, wherein d1 ＞ d2 ＞ d3 ＞ ... di ＞ di+1 ＞ D, the D represent stake
Basic engineering diameter；
(b) length of steel pile castings at different levels is determined according to the thickness of overburden layer, the floor level of solution cavity and solution cavity size parameter
Determine that principle is solution cavity bottom surface of each steel pile casting base opening less than respective layer or overlying soil with the length of steel pile casting wall thickness, steel pile casting
Bottom surface, it is ensured that steel pile casting can all be isolated solution cavity or overlying soil；Steel pile casting wall thickness determines that principle is to consider steel pile casting least
Steel pile casting wall thickness corresponding to sharp stress；
(3) determine that drillings at different levels are whole according to steel pile casting diameters at different levels principle corresponding with drilling integral diameters at different levels
Diameter sets steel pile casting T1, T2, T3 ... Ti, Ti+1 and is corresponding in turn to drilling integral diameter as D1, D2, D3 ... Di, Di+1, wherein
D1=d1, Di+1 ＞ di+1 and Di+1 ＜ di in Di, Di+1 in D2, D3 ..., then drilling integral diameters at different levels be followed successively by D1, D2,
D3 ... Di, Di+1, D, wherein D1 ＞ D2 ＞ D3 ＞ ... Di ＞ Di+1 ＞ D；
(4) drillings at different levels in lithostratigraphy are all made of the mode to drill by several times and carry out, and bore diameter is finally made to reach true
Fixed drilling integral diameters at different levels；
(5) the drilling integral diameter corresponding to the stake holes center of surveying and locating and work steel pile casting, utilizes churning driven
Drilling construction is carried out, until drilling through overburden layer, oblique scar is polished, into overburden layer scar below；
(6) work steel pile casting is transferred, coordinates the technique of leading truck to transfer work steel pile casting to overburden layer using vibration hammer
On scar below；
(7) after the decentralization in place of work steel pile casting, start overburden layer bottom absolute altitude to the rock between first layer solution cavity floor level
Earth-boring is constructed, the specific steps are：
Lithostratigraphy is excavated by several times using the method that churning driven drills by several times, until bottom plate of the drilling to first layer solution cavity
At absolute altitude, and the bottom plate of first layer solution cavity is polished, drilling integral diameter is D2, and specific method is：It is first used when drilling small straight
The drill bit of diameter is crept into, and after creeping into certain depth, then is used major diameter drill bit to this section of stratum reaming, is recycled successively, bore diameter
Gradually increase from small up to reaching this layer of determining drilling integral diameter D2；
(8) technique of vibration hammer cooperation leading truck is used to transfer the second level steel pile casting of corresponding first layer solution cavity to first
On the bottom plate scar below of layer solution cavity；
(9) repeat step (7) and step (8), according to drilling integral diameters at different levels corresponding with steel pile casting diameters at different levels according to
Lithostratigraphy drilling between the secondary bottom plate for carrying out neighbouring two layers of solution cavity, and corresponding steel pile casting T3~Ti at different levels is transferred successively
+ 1, until the Ti+1 decentralizations of afterbody steel pile casting are completed；
(10) continue to be drilled down into using gradation drilling construction method after the completion of all steel pile casting decentralizations, drilling is whole at this time
A diameter of Design of Foundation diameter, and drilling depth reaches design pile foundation bottom hole absolute altitude；
(11) after creeping into design pile foundation bottom hole absolute altitude, and bottom hole is polished, terminate drilling, all drilling constructions are complete
At.
The beneficial effects of the invention are as follows：It is easy to operation, it is efficient, can be rapidly completed and pass through multilayer karst cave ultra-deep and large diameter stake
Basic drilling construction, and then accelerate the construction speed of pile foundation and entire engineering.
Description of the drawings
Fig. 1 is to pass through multilayer karst cave ultra-deep and large diameter pile foundation drilling schematic diagram.
Specific implementation mode
Below in conjunction with the accompanying drawings, the specific implementation mode of the present invention is described in detail.
One kind of the present invention as shown in Figure 1 passing through multilayer karst cave ultra-deep and large diameter pile foundation boring method, including following
Step：
(1) according to the related geology prospecting report of pile foundation, the position of solution cavity 3, solution cavity during pile foundation construction are determined
1 thickness of distribution number of plies i and overburden layer of top plate and floor level, type of cavern, solution cavity volume, solution cavity on facade.
(2) it determines decentralization steel pile casting parameter, is as follows：
(a) according to 3 number of plies of solution cavity, determination need to transfer the diameter of the number of plies and each layer steel pile casting of steel pile casting.Steel shield to be transferred
The number of plies of cylinder determines that method is：Every layer of solution cavity transfers a steel pile casting, and work steel pile casting, work need to be arranged when churning driven construction
Make steel pile casting to pass through overburden layer 1, the solution cavity number of plies to be i, then shared i+1 grades of steel pile casting, steel pile casting be named as successively from outside to inside T1,
T2, T3 ... Ti, Ti+1, wherein T1 are work steel pile casting, and Ti+1 is the steel pile casting of corresponding i-th layer of solution cavity.With steel pile castings pair at different levels
The steel pile casting diameter answered is named as d1, d2, d3 ... di, di+1, wherein d1 ＞ d2 ＞ d3 ＞ ... di ＞ di+1 ＞ D, the D generations
Table Design of Foundation diameter.
Design of Foundation diameter D does not have corresponding steel pile casting, i.e., when being crept by design diameter, outside is no steel pile casting
's.Normal rock geology is had been enter at this time, and hole wall is all right, does not need steel pile casting and carries out supporting or isolation.
(b) length of steel pile castings at different levels is determined according to the thickness of overburden layer 1, the floor level of solution cavity 3 and solution cavity size parameter
Degree and steel pile casting wall thickness.The length of steel pile casting determines that principle is solution cavity bottom surface of each steel pile casting base opening less than respective layer or overburden soil
Layer bottom surface, it is ensured that steel pile casting can all be isolated solution cavity or overlying soil；Steel pile casting wall thickness determines that principle is to consider steel pile casting most
Unfavorable stress, the poor (peace of external and internal pressure that steel pile casting can be born when concrete perfusion generally at the maximum molten chamber of solution cavity
Overall coefficient is chosen according to code requirement, to ensure that steel pile casting does not deform when bearing maximum external force) corresponding to steel
Casing wall thickness, it is ensured that the rigidity and intensity of steel pile casting are met the requirements.
(3) determine that drillings at different levels are whole according to steel pile casting diameters at different levels principle corresponding with drilling integral diameters at different levels
Diameter sets steel pile casting T1, T2, T3 ... Ti, Ti+1 and is corresponding in turn to drilling integral diameter as D1, D2, D3 ... Di, Di+1, wherein
D1=d1, Di+1 ＞ di+1 and Di+1 ＜ di in Di, Di+1 in D2, D3 ..., then drilling integral diameters at different levels be followed successively by D1, D2,
D3 ... Di, Di+1, D, wherein D1 ＞ D2 ＞ D3 ＞ ... Di ＞ Di+1 ＞ D, D represent Design of Foundation diameter.
(4) drillings at different levels in lithostratigraphy are all made of the mode to drill by several times and carry out, according to including drilling depth, rock
Combined factors including intensity, churning driven model and performance consider that the small punching diameter that lithostratigraphy drills by several times is generally
1.5m~1.8m, twice adjacent bore diameter difference general control so that bore diameter is reached determining between 0.5~1m
Drilling integral diameters at different levels.
(5) the drilling integral diameter D1 corresponding to the stake holes center of surveying and locating and work steel pile casting T1, utilizes rotation
It digs brill 4 and carries out drilling constructions, until drilling through overburden layer 1, oblique scar is polished, into 1 scar 2 below of overburden layer.
(6) work steel pile casting T1 is transferred, coordinates the technique of the leading truck steel pile casting T1 that will work to transfer to covering using vibration hammer
On 1 scar 2 below of soil layer.
(7) after work steel pile casting T1 decentralizations in place, start 1 bottom absolute altitude of overburden layer between 3 floor level of first layer solution cavity
Lithostratigraphy drilling construction, the specific steps are：
Lithostratigraphy is excavated by several times using the method that churning driven drills by several times, up to drilling to the bottom of first layer solution cavity 3
At plate absolute altitude, and the bottom plate of first layer solution cavity 3 is polished, drilling integral diameter is D2, and specific method is：It is first used when drilling small
The drill bit of diameter is crept into, and after creeping into certain depth, then is used major diameter drill bit to this section of stratum reaming, is recycled successively, drilling is straight
Diameter gradually increases up to reaching this layer of determining drilling integral diameter D2 from small.
(8) use the technique of vibration hammer cooperation leading truck by the second level steel pile casting T2 of corresponding first layer solution cavity 3 transfer to
On the bottom plate scar 2 below of first layer solution cavity 3.
(9) repeat step (7) and step (8), according to drilling integral diameters at different levels corresponding with steel pile casting diameters at different levels according to
Rock between the secondary bottom plate (bottom plate of the bottom plate of first layer solution cavity 3 to i-th layer of solution cavity 3) for carrying out neighbouring two layers of solution cavity 3
Layer drilling, and corresponding steel pile casting T3~Ti+1 at different levels is transferred successively, until the Ti+1 decentralizations of afterbody steel pile casting are completed i.e. most
Later layer (i-th layer) karst cave treatment is completed.
(10) continue to be drilled down into using gradation drilling construction method after the completion of all steel pile casting decentralizations, drilling is whole at this time
A diameter of Design of Foundation diameter D, and drilling depth reaches design pile foundation bottom hole absolute altitude.
(11) after creeping into design pile foundation bottom hole absolute altitude, and bottom hole is polished, terminate drilling, all drilling constructions are complete
At.
Embodiment 1
(1) certain project is in karst area, design stake diameter D=2.5m.According to the related geological prospecting report of pile foundation
It accuses, determines that position, Upper Plate of Karst Cave and the floor level of solution cavity, type of cavern, solution cavity volume, solution cavity exist during pile foundation construction
The distribution number of plies on facade is two layers, and earthing layer thickness is 8m, and first layer cavern depth is range (23.5~29) m, the second layer
Cavern depth range (54.8~62.9) m.
(2) it determines decentralization steel pile casting parameter, is as follows：
(a) according to the solution cavity number of plies, determination need to transfer the diameter of the number of plies and each layer steel pile casting of steel pile casting.Steel pile casting to be transferred
The number of plies determine that method is：Every layer of solution cavity transfers a steel pile casting, and work steel pile casting need to be arranged when churning driven construction.Work
It is 2 that steel pile casting, which passes through overburden layer, the solution cavity number of plies, then steel pile casting shares 3 grades, steel pile casting be named as successively from outside to inside T1, T2,
T3, wherein T1 are work steel pile casting, and T2 is the steel pile casting of corresponding 1st layer of solution cavity, and T3 is the steel pile casting of corresponding 2nd layer of solution cavity.Really
Fixed steel pile casting diameters at different levels are respectively d1=3.05m, d2=2.86m, d3=2.65m.
(b) length of steel pile castings at different levels is determined according to the thickness of overburden layer, the floor level of solution cavity and solution cavity size parameter
With steel pile casting wall thickness.The length of steel pile casting determines that principle is solution cavity bottom surface of each steel pile casting base opening less than respective layer or overlying soil
Bottom surface, it is ensured that steel pile casting can all be isolated solution cavity or overlying soil, that is, the rigid casing decentralization depth that works is 8.2m, first layer steel
It is 29.2m that casing, which transfers depth, and it is 63.1m that second layer steel pile casting, which transfers depth,.
(3) determine that drillings at different levels are whole according to steel pile casting diameters at different levels principle corresponding with drilling integral diameters at different levels
Diameter, set steel pile casting T1, T2, T3 be corresponding in turn to drilling integral diameter as D1, D2, D3, wherein D1=d1, the D2 in D2, D3
＞ d2 and D2 ＜ d1, D3 ＞ d3 and D3 ＜ d2 determine that each bore diameter is respectively D1=3.05m, D2=according to construction needs
2.92m D3=2.73m.
(4) drillings at different levels in lithostratigraphy are all made of the mode to drill by several times and carry out, and lithostratigraphy drills first by several times
Secondary bore diameter is 1.8mm, and adjacent bore diameter difference control twice finally makes bore diameter reach determining brills at different levels in 1m
Hole integral diameter.
(5) the drilling integral diameter D1 corresponding to the stake holes center of surveying and locating and work steel pile casting T1, utilizes rotation
It digs brill 4 and carries out drilling constructions, until drilling through overburden layer 1, oblique scar is polished, into 1 scar 2 below of overburden layer.
(6) work steel pile casting T1 is transferred, coordinates the technique of the leading truck steel pile casting T1 that will work to transfer to covering using vibration hammer
On 1 scar 2 below of soil layer.
(7) after work steel pile casting T1 decentralizations in place, start 1 bottom absolute altitude of overburden layer between 3 floor level of first layer solution cavity
Lithostratigraphy drilling construction, the specific steps are：
Lithostratigraphy is excavated by several times using the method that churning driven drills by several times, up to drilling to the bottom of first layer solution cavity 3
At plate absolute altitude, and the bottom plate of first layer solution cavity 3 is polished, drilling integral diameter is D2=2.92m, and specific method is：When drilling
It first uses the drill bit of minor diameter to creep into, after creeping into certain depth, then uses major diameter drill bit to this section of stratum reaming, follow successively
Ring, bore diameter gradually increase up to reaching this layer of determining drilling integral diameter D2=2.92m from small.
(8) use the technique of vibration hammer cooperation leading truck by the second level steel pile casting T2 of corresponding first layer solution cavity 3 transfer to
On the bottom plate scar 2 below of first layer solution cavity 3.
(9) repeat step (7) and step (8), according to drilling integral diameters at different levels corresponding with steel pile casting diameters at different levels according to
Lithostratigraphy between the secondary bottom plate (bottom plate of the bottom plate of first layer solution cavity to second layer solution cavity) for carrying out neighbouring two layers of solution cavity 3
Drilling, transfers corresponding steel pile casting T3, and decentralization is completed to be that last layer (second layer) karst cave treatment is completed.
(10) continue to be drilled down into using gradation drilling construction method after the completion of all steel pile casting decentralizations, drilling is whole at this time
A diameter of Design of Foundation diameter D=2.5m, and drilling depth reaches design pile foundation bottom hole absolute altitude.
(11) after creeping into design pile foundation bottom hole absolute altitude, and bottom hole is polished, terminate drilling, all drilling constructions are complete
At.
This kind of method operability is strong after testing, and it is repeatedly inefficient can effectively to solve two layers of solution cavity pile foundation construction karst cave treatment
Problem accelerates pore-forming efficiency, improves construction quality.
Embodiment 2
(1) certain project is in karst area, design stake diameter D=2.5m.According to the related geological prospecting report of pile foundation
It accuses, determines that position, Upper Plate of Karst Cave and the floor level of solution cavity, type of cavern, solution cavity volume, solution cavity exist during pile foundation construction
The distribution number of plies on facade is three layers, and earthing layer thickness is 8m.First layer cavern depth be range (22.4~23.1) m, second
Layer cavern depth range (55.8~67.7) m, third layer cavern depth range (74.2~78.3) m.
(2) it determines decentralization steel pile casting parameter, is as follows：
(a) according to the solution cavity number of plies, determination need to transfer the diameter of the number of plies and each layer steel pile casting of steel pile casting.Steel pile casting to be transferred
The number of plies determine that method is：Every layer of solution cavity transfers a steel pile casting, and work steel pile casting need to be arranged when churning driven construction, works
It is 3 layers that steel pile casting, which passes through overburden layer, the solution cavity number of plies, then steel pile casting shares 4 grades, steel pile casting be named as successively from outside to inside T1, T2,
T3, T4, wherein T1 are work steel pile casting, and T2 is the steel pile casting of corresponding 1st layer of solution cavity, and T3 is the steel pile casting of corresponding 2nd layer of solution cavity,
T4 is the steel pile casting of corresponding 3rd layer of solution cavity.Determine that steel pile casting diameters at different levels are respectively d1=3.3m, d2=3.05m, d3=
2.86m d4=2.65m.
(b) length of steel pile castings at different levels is determined according to the thickness of overburden layer 1, the floor level of solution cavity 3 and solution cavity size parameter
Degree and steel pile casting wall thickness.The length of steel pile casting determines that principle is solution cavity bottom surface of each steel pile casting base opening less than respective layer or overburden soil
Layer bottom surface, it is ensured that steel pile casting can all be isolated solution cavity or overlying soil, that is, the rigid casing decentralization depth that works is 8.2m, first layer
It is 23.3m that steel pile casting, which transfers depth, and it is 67.9m that second layer steel pile casting, which transfers depth, and third layer steel pile casting decentralization depth is
78.5m；
(3) determine that drillings at different levels are whole according to steel pile casting diameters at different levels principle corresponding with drilling integral diameters at different levels
Diameter, set steel pile casting T1, T2, T3, T4 be corresponding in turn to drilling integral diameter as D1, D2, D3, D4, wherein D1=d1, D2,
D2 ＞ d2 and D2 ＜ d1, D3 ＞ d3 and D3 ＜ d2, D4 ＞ d4 and D4 ＜ d3 in D3, D4 determine that each drilling is straight according to construction needs
Diameter is respectively D1=3.3m, D2=3.14m, D3=2.92m, D4=2.73m.
(4) drillings at different levels in lithostratigraphy are all made of the mode to drill by several times and carry out, and lithostratigraphy drills first by several times
Secondary bore diameter is 1.5m, and adjacent bore diameter difference is generally in 0.5m twice, and bore diameter is finally made to reach determining at different levels
Drill integral diameter.
(5) the drilling integral diameter D1 corresponding to the stake holes center of surveying and locating and work steel pile casting T1, utilizes rotation
It digs brill 4 and carries out drilling constructions, until drilling through overburden layer 1, oblique scar is polished, into 1 scar 2 below of overburden layer.
(6) work steel pile casting T1 is transferred, coordinates the technique of the leading truck steel pile casting T1 that will work to transfer to covering using vibration hammer
On 1 scar 2 below of soil layer.
(7) after work steel pile casting T1 decentralizations in place, start 1 bottom absolute altitude of overburden layer between 3 floor level of first layer solution cavity
Lithostratigraphy drilling construction, the specific steps are：
Lithostratigraphy is excavated by several times using the method that churning driven drills by several times, up to drilling to the bottom of first layer solution cavity 3
At plate absolute altitude, and the bottom plate of first layer solution cavity 3 is polished, drilling integral diameter is D2=3.14m, and specific method is：When drilling
It first uses the drill bit of minor diameter to creep into, after creeping into certain depth, then uses major diameter drill bit to this section of stratum reaming, follow successively
Ring, bore diameter gradually increase up to reaching this layer of determining drilling integral diameter D2=3.14m from small.
(8) use the technique of vibration hammer cooperation leading truck by the second level steel pile casting T2 of corresponding first layer solution cavity 3 transfer to
On the bottom plate scar 2 below of first layer solution cavity 3.
(9) repeat step (7) and step (8), according to drilling integral diameters at different levels corresponding with steel pile casting diameters at different levels according to
Lithostratigraphy between the secondary bottom plate (bottom plate of the bottom plate of first layer solution cavity to third layer solution cavity) for carrying out neighbouring two layers of solution cavity 3
Drilling, and corresponding steel pile casting T3~T4 at different levels is transferred successively, until the T4 decentralizations of afterbody steel pile casting are completed to be last layer
(third layer) karst cave treatment is completed.
(10) continue to be drilled down into using gradation drilling construction method after the completion of all steel pile casting decentralizations, drilling is whole at this time
A diameter of Design of Foundation diameter D=2.5m, and drilling depth reaches design pile foundation bottom hole absolute altitude.
(11) after creeping into design pile foundation bottom hole absolute altitude, and bottom hole is polished, terminate drilling, all drilling constructions are complete
At.
This kind of method operability is strong after testing, can effectively solve three layers of solution cavity pile foundation cavity and handle repeatedly inefficient ask
Topic, improves pile foundation pore-forming efficiency, pile foundation pile quality significantly improves.
Embodiment 3
(1) certain project is in karst area, design stake diameter D=2.5m.According to the related geological prospecting report of pile foundation
It accuses, determines that position, Upper Plate of Karst Cave and floor level, type of cavern, solution cavity volume, the solution cavity of solution cavity during pile foundation construction exist
The distribution number of plies on facade is 4 layers and earthing layer thickness is 8m, and first layer cavern depth is range (24.5~27.6) m, the
Two layers of cavern depth range (43.1~47.6) m, third layer cavern depth range (59.5~62.7) m, the 4th layer of cavern depth
Range (79.5~86.7) m.
(2) it determines decentralization steel pile casting parameter, is as follows：
(a) according to the solution cavity number of plies, determination need to transfer the diameter of the number of plies and each layer steel pile casting of steel pile casting.Steel pile casting to be transferred
The number of plies determine that method is：Every layer of solution cavity transfers a steel pile casting, and work steel pile casting need to be arranged when churning driven construction, works
It is four layers that steel pile casting, which passes through overburden layer, the solution cavity number of plies, then steel pile casting shares 5 grades, steel pile casting be named as successively from outside to inside T1,
T2, T3, T4, T5, wherein T1 are work steel pile casting, and T2 is the steel pile casting of corresponding first layer solution cavity, and T3 is corresponding second layer solution cavity
Steel pile casting, T4 is the steel pile casting of corresponding third layer solution cavity, and T5 be the steel pile casting of the 4th layer of solution cavity of correspondence.Determine steel pile castings at different levels
Diameter is respectively d1=3.6m, d2=3.3m, d3=3.05m, d4=2.86m, d5=2.65m.
(b) length of steel pile castings at different levels is determined according to the thickness of overburden layer 1, the floor level of solution cavity 3 and solution cavity size parameter
Degree and steel pile casting wall thickness.The length of steel pile casting determines that principle is solution cavity bottom surface of each steel pile casting base opening less than respective layer or overburden soil
Layer bottom surface, it is ensured that steel pile casting can all be isolated solution cavity or overlying soil；The rigid casing decentralization depth that works is 8.2m, first layer
It is 27.8m that steel pile casting, which transfers depth, and it is 47.8m that second layer steel pile casting, which transfers depth, and third layer steel pile casting decentralization depth is
62.9m, the 4th layer of steel pile casting decentralization depth is 86.9m.
(3) determine that drillings at different levels are whole according to steel pile casting diameters at different levels principle corresponding with drilling integral diameters at different levels
Diameter, set steel pile casting T1, T2, T3, T4, T5 be corresponding in turn to drilling integral diameter as D1, D2, D3, D4, D5, wherein D1=d1,
D2 ＞ d2 and D2 ＜ d1, D3 ＞ d3 and D3 ＜ d2, D4 ＞ d4 and D4 ＜ d3, D5 ＞ d5 and D5 ＜ d4, root in D2, D3, D4, D5
It is needed according to construction, determines that each bore diameter is respectively D1=3.6m, D2=3.4m, D3=3.14m, D4=2.92, D5=
2.73m。
(4) drillings at different levels in lithostratigraphy are all made of the mode to drill by several times and carry out, and lithostratigraphy drills first by several times
Secondary bore diameter is 1.6mm, and adjacent bore diameter difference general control finally makes bore diameter reach true between 0.8m twice
Fixed drilling integral diameters at different levels.
(5) the drilling integral diameter D1 corresponding to the stake holes center of surveying and locating and work steel pile casting T1, utilizes rotation
It digs brill 4 and carries out drilling constructions, until drilling through overburden layer 1, oblique scar is polished, into 1 scar 2 below of overburden layer.
(6) work steel pile casting T1 is transferred, coordinates the technique of the leading truck steel pile casting T1 that will work to transfer to covering using vibration hammer
On 1 scar 2 below of soil layer.
(7) after work steel pile casting T1 decentralizations in place, start 1 bottom absolute altitude of overburden layer between 3 floor level of first layer solution cavity
Lithostratigraphy drilling construction, the specific steps are：
Lithostratigraphy is excavated by several times using the method that churning driven drills by several times, up to drilling to the bottom of first layer solution cavity 3
At plate absolute altitude, and the bottom plate of first layer solution cavity 3 is polished, drilling integral diameter is D2=3.4m, and specific method is：It is first when drilling
It is crept into using the drill bit of minor diameter, after creeping into certain depth, then uses major diameter drill bit to this section of stratum reaming, recycle successively,
Bore diameter gradually increases up to reaching this layer of determining drilling integral diameter D2=3.4m from small.
(8) use the technique of vibration hammer cooperation leading truck by the second level steel pile casting T2 of corresponding first layer solution cavity 3 transfer to
On the bottom plate scar 2 below of first layer solution cavity 3.
(9) repeat step (7) and step (8), according to drilling integral diameters at different levels corresponding with steel pile casting diameters at different levels according to
Lithostratigraphy between the secondary bottom plate (bottom plate of the bottom plate of first layer solution cavity to the 4th layer of solution cavity) for carrying out neighbouring two layers of solution cavity 3
Drilling, and corresponding steel pile casting T3~T5 at different levels is transferred successively, until the T5 decentralizations of afterbody steel pile casting are completed to be last layer
(the 4th layer) karst cave treatment is completed.
(10) continue to be drilled down into using gradation drilling construction method after the completion of all steel pile casting decentralizations, drilling is whole at this time
A diameter of Design of Foundation diameter D=2.5m, and drilling depth reaches design pile foundation bottom hole absolute altitude.
(11) after creeping into design pile foundation bottom hole absolute altitude, and bottom hole is polished, terminate drilling, all drilling constructions are complete
At.
This method operability is strong after testing, compared to traditional pile foundation drilling construction method, can effectively solve four layers of solution cavity
Ultra-deep and large diameter pile foundation construction karst cave treatment inefficient problem repeatedly, pile foundation pore-forming efficiency and hole quality significantly improve.
Claims (2)
1. one kind passing through multilayer karst cave ultra-deep and large diameter pile foundation boring method, it is characterised in that include the following steps：
(1) according to the related geology prospecting report of pile foundation, determine the position of solution cavity during pile foundation construction, Upper Plate of Karst Cave and
The distribution number of plies and earthing layer thickness of floor level, type of cavern, solution cavity volume, solution cavity on facade；
(2) it determines decentralization steel pile casting parameter, is as follows：
(a) according to the solution cavity number of plies, determination need to transfer the diameter of the number of plies and each layer steel pile casting of steel pile casting, the layer of steel pile casting to be transferred
Number determines that method is：Every layer of solution cavity transfers a steel pile casting, and work steel pile casting is arranged when churning driven construction, and work steel pile casting
Across overburden layer, the solution cavity number of plies is i, then steel pile casting is i+1 grades shared, and steel pile casting is named as T1, T2, T3 successively from outside to inside ...
Ti, Ti+1, wherein T1 are work steel pile casting, and Ti+1 is the steel pile casting of corresponding i-th layer of solution cavity, steel shield corresponding with steel pile castings at different levels
Cylinder diameter is named as d1, d2, d3 ..., and di, di+1, wherein d1 ＞ d2 ＞ d3 ＞ ... di ＞ di+1 ＞ D, the D represent pile foundation
Design diameter；
(b) length and steel of steel pile castings at different levels are determined according to the thickness of overburden layer, the floor level of solution cavity and solution cavity size parameter
The length of casing wall thickness, steel pile casting determines that principle is solution cavity bottom surface of each steel pile casting base opening less than respective layer or overlying soil bottom
Face, it is ensured that steel pile casting can all be isolated solution cavity or overlying soil；Steel pile casting wall thickness determines that principle is to consider steel pile casting least favorable
Steel pile casting wall thickness corresponding to stress；
(3) drilling integrated straights at different levels are determined according to steel pile casting diameters at different levels principle corresponding with drilling integral diameters at different levels
Diameter sets steel pile casting T1, T2, T3 ... Ti, Ti+1 and is corresponding in turn to drilling integral diameter as D1, D2, D3 ... Di, Di+1, wherein D1
=d1, Di+1 ＞ di+1 and Di+1 ＜ di in Di, Di+1 in D2, D3 ..., then drilling integral diameters at different levels be followed successively by D1, D2,
D3 ... Di, Di+1, D, wherein D1 ＞ D2 ＞ D3 ＞ ... Di ＞ Di+1 ＞ D；
(4) drillings at different levels in lithostratigraphy are all made of the mode to drill by several times and carry out, and bore diameter is finally made to reach determining
Drilling integral diameters at different levels；
(5) the drilling integral diameter corresponding to the stake holes center of surveying and locating and work steel pile casting, is carried out using churning driven
Drilling construction polishes oblique scar, until drilling through overburden layer into overburden layer scar below；
(6) work steel pile casting is transferred, coordinates the technique of leading truck to transfer work steel pile casting to overburden layer using vibration hammer
Scar on；
(7) after the decentralization in place of work steel pile casting, start overburden layer bottom absolute altitude to the lithostratigraphy between first layer solution cavity floor level
Drilling construction, the specific steps are：
Lithostratigraphy is excavated by several times using the method that churning driven drills by several times, until floor level of the drilling to first layer solution cavity
Place, and the bottom plate of first layer solution cavity is polished, drilling integral diameter is D2, and specific method is：Minor diameter is first used when drilling
Drill bit is crept into, and after creeping into certain depth, then is recycled successively to this section of stratum reaming using major diameter drill bit, bore diameter is from small
Gradually increase until reaching this layer of determining drilling integral diameter D2；
(8) technique of vibration hammer cooperation leading truck is used to transfer the second level steel pile casting of corresponding first layer solution cavity molten to first layer
On the bottom plate scar below in hole；
(9) repeat step (7) and step (8), according to drilling integral diameters at different levels corresponding with steel pile casting diameters at different levels successively into
Lithostratigraphy drilling between the bottom plate of neighbouring two layers of the solution cavity of row, and corresponding steel pile casting T3~Ti+1 at different levels is transferred successively,
Until the Ti+1 decentralizations of afterbody steel pile casting are completed；
(10) continue to be drilled down into using gradation drilling construction method after the completion of all steel pile casting decentralizations, drill integral diameter at this time
For Design of Foundation diameter, and drilling depth reaches design pile foundation bottom hole absolute altitude；
(11) after creeping into design pile foundation bottom hole absolute altitude, and bottom hole is polished, terminate drilling, all drilling constructions completions.
2. according to claim 1 pass through multilayer karst cave ultra-deep and large diameter pile foundation boring method, it is characterised in that：Rock
A diameter of 1.5m~the 1.8m of small punching that stratum drills by several times, adjacent bore diameter difference control is between 0.5~1m twice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810239887.8A CN108411928A (en) | 2018-03-22 | 2018-03-22 | One kind passing through multilayer karst cave ultra-deep and large diameter pile foundation boring method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810239887.8A CN108411928A (en) | 2018-03-22 | 2018-03-22 | One kind passing through multilayer karst cave ultra-deep and large diameter pile foundation boring method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108411928A true CN108411928A (en) | 2018-08-17 |
Family
ID=63133212
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810239887.8A Pending CN108411928A (en) | 2018-03-22 | 2018-03-22 | One kind passing through multilayer karst cave ultra-deep and large diameter pile foundation boring method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108411928A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852326A (en) * | 2020-07-06 | 2020-10-30 | 深圳市工勘岩土集团有限公司 | Karst development area rotary excavating mine type extrusion drill bit karst cave treatment method |
| CN113914309A (en) * | 2021-09-29 | 2022-01-11 | 中国建筑第六工程局有限公司 | Laminated karst cave stratum pile foundation construction method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553003A (en) * | 2003-09-27 | 2004-12-08 | 叶照桂 | Multi-layer assembled steel pipe embedding rock piling method |
| CN103485336A (en) * | 2013-09-30 | 2014-01-01 | 中铁二十局集团有限公司 | Drilling pile drilling construction method of bead-type karst area |
| CN103485716A (en) * | 2013-09-27 | 2014-01-01 | 福建成森建设集团有限公司 | Karst-geology rotary-drill guide-hole construction method |
| CN203487528U (en) * | 2013-09-30 | 2014-03-19 | 中铁二十局集团有限公司 | Underground river karst cave treatment structure for underwater pier drilled pile construction in beaded type karst area |
| CN106284314A (en) * | 2016-08-31 | 2017-01-04 | 中冶建工集团有限公司 | Karst landform spiral-digging pore cast-in-place pile construction method |
-
2018
- 2018-03-22 CN CN201810239887.8A patent/CN108411928A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1553003A (en) * | 2003-09-27 | 2004-12-08 | 叶照桂 | Multi-layer assembled steel pipe embedding rock piling method |
| CN103485716A (en) * | 2013-09-27 | 2014-01-01 | 福建成森建设集团有限公司 | Karst-geology rotary-drill guide-hole construction method |
| CN103485336A (en) * | 2013-09-30 | 2014-01-01 | 中铁二十局集团有限公司 | Drilling pile drilling construction method of bead-type karst area |
| CN203487528U (en) * | 2013-09-30 | 2014-03-19 | 中铁二十局集团有限公司 | Underground river karst cave treatment structure for underwater pier drilled pile construction in beaded type karst area |
| CN106284314A (en) * | 2016-08-31 | 2017-01-04 | 中冶建工集团有限公司 | Karst landform spiral-digging pore cast-in-place pile construction method |
Non-Patent Citations (1)
| Title |
|---|
| 鲍庆伟等: "复杂岩溶地区超大径超长桩旋挖钻入岩施工技术", 《世界桥梁》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111852326A (en) * | 2020-07-06 | 2020-10-30 | 深圳市工勘岩土集团有限公司 | Karst development area rotary excavating mine type extrusion drill bit karst cave treatment method |
| CN113914309A (en) * | 2021-09-29 | 2022-01-11 | 中国建筑第六工程局有限公司 | Laminated karst cave stratum pile foundation construction method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3406802A1 (en) | Offshore rock-drilling redriving-type large-diameter pile structure and construction method | |
| CN104947690B (en) | Grooving construction method for embedding underground continuous wall into rock | |
| CN105649012B (en) | Upper-soft lower-hard ground subway station building enclosure drilled pile construction method | |
| CN106245626A (en) | A kind of hard formation churning driven enters method | |
| CN104806251B (en) | Subsidiary inverted excavation construction method for urban subway station under complex environment | |
| CN102071683A (en) | Water drill dug pile construction method | |
| CN106759282B (en) | A kind of mechanical hole building method of super-large diameter hard rock bored concrete pile half | |
| CN108729924A (en) | A kind of urban hard rock tunnel mechanical excavation rapid constructing method | |
| CN105421474B (en) | For the plant pile cofferdam platform integral construction method of lithostratigraphy low pile cap | |
| CN106194193A (en) | The auxiliary excavation method of a kind of group hole, big cross section vertical shaft non-explosion large aperture | |
| CN107059847A (en) | A kind of competent bed water mill bores pouring pile hole structure and its construction from the bottom of one's heart | |
| CN108589711A (en) | A kind of construction method of bead string type solution cavity development area fender post | |
| CN110374091A (en) | A kind of rectangle friction pile mechanical hole building construction method | |
| CN110821497A (en) | Excavation method of tunnel vertical shaft | |
| CN108411928A (en) | One kind passing through multilayer karst cave ultra-deep and large diameter pile foundation boring method | |
| CN110984132B (en) | Construction method for grooving underground diaphragm wall under complex geological condition | |
| CN116220546A (en) | Construction method for combining super-thick hard rock condition large-diameter long piles into holes | |
| CN203584301U (en) | Hole guide equipment | |
| CN204299468U (en) | A kind of positioning and guiding system and device of hidden hole drilling boring | |
| CN105019431B (en) | Crush and complete alternate steep dip stratified rock masses Large Diameter Super-long Bored Piles construction method | |
| CN206956717U (en) | Marine rock drilling strike-on type large diameter pile structure | |
| CN107938652A (en) | A kind of embedding lithotype steel cement mixing wall and its construction method | |
| CN116181224A (en) | Construction method of multi-layer oversized karst cave rock-socketed pile foundation in complex karst area | |
| JP2010522289A (en) | Rock blasting method for constructing foundation of transmission tower | |
| CN110273413A (en) | A kind of efficient construction method of prefabricated pile |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180817 |
|
| WD01 | Invention patent application deemed withdrawn after publication |