CN112031017A - Construction method suitable for deep water pile foundation steel casing under bare rock geological condition - Google Patents
Construction method suitable for deep water pile foundation steel casing under bare rock geological condition Download PDFInfo
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- CN112031017A CN112031017A CN202010951000.5A CN202010951000A CN112031017A CN 112031017 A CN112031017 A CN 112031017A CN 202010951000 A CN202010951000 A CN 202010951000A CN 112031017 A CN112031017 A CN 112031017A
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- construction
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- pile
- pile foundation
- bare rock
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D27/00—Foundations as substructures
- E02D27/32—Foundations for special purposes
- E02D27/52—Submerged foundations, i.e. submerged in open water
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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
- E02D5/385—Concrete or concrete-like piles cast in position ; Apparatus for making same making by use of mould-pipes or other moulds with removal of the outer mould-pipes
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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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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/04—Directional drilling
- E21B7/043—Directional drilling for underwater installations
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/12—Underwater drilling
- E21B7/122—Underwater drilling with submersible vertically movable guide
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B7/00—Special methods or apparatus for drilling
- E21B7/18—Drilling by liquid or gas jets, with or without entrained pellets
- E21B7/185—Drilling by liquid or gas jets, with or without entrained pellets underwater
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0007—Production methods using a mold
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0023—Cast, i.e. in situ or in a mold or other formwork
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2250/00—Production methods
- E02D2250/0061—Production methods for working underwater
- E02D2250/0076—Drilling
Abstract
A construction method of a deep water pile foundation steel casing suitable for bare rock geological conditions comprises the following steps: the method comprises the following steps: setting up a construction trestle and a drilling platform → exploring and leveling a riverbed foundation → lowering and positioning an outer water-blocking steel casing → a rotary drilling rig tooth matching wheel cylinder drill bit to grooving the bedrock → embedding the construction casing into an annular slot → lowering yellow clay or underwater concrete by a guide pipe to fill a gap between the construction casing and the bare rock slot → pulling out the outer casing, moving the outer casing and equipment to the next hole site, and sequentially and circularly finishing the construction of casings of other hole sites; the pile foundation steel pile casing construction method can quickly finish pile foundation steel pile casing construction under difficult construction conditions of bare rock, deep water and the like, and the pile foundation construction pile casing can accurately extend into the stable bedrock, so that the pile foundation construction quality is effectively guaranteed, and the pile foundation steel pile casing construction method is safe and reliable in the construction process, short in construction period and good in economic benefit.
Description
Technical Field
The invention relates to the field of bridge pile foundation engineering, in particular to a construction method of a deep-water pile foundation steel casing suitable for bare rock geological conditions.
Background
In the field of bridge pile foundation engineering, bridge structures are commonly adopted for crossing rivers and cross rivers, bridge pile foundation construction on the rivers is commonly existed in various projects, the difficulty degree of underwater pile foundation construction is greatly different according to different geological conditions, hydrological conditions and the like, and the accurate positioning and implantation of a pile casing of bare rock geology under deep water conditions are more difficult; because the riverbed covering layer is shallow, the riverbed bedrock is directly exposed, and the pile foundation steel casing can not be directly sunk in place by adopting a vibration hammer or a pile driver.
At present, the construction of a pile casing under the condition of bare rock of a deepwater pile foundation generally adopts percussion drilling to lead a hole and then transfers a steel pile casing, and the following two defects are mainly existed: firstly, the punching progress of the impact drill is slow, and the construction period is long; and secondly, the hole expansion coefficient of the percussion drilling hole guiding process is large, the hole guiding and the pile casing can not be closely attached, and the bottom opening of the pile casing is easy to leak slurry or even collapse in the later pile foundation construction process, so that large quality hidden troubles are caused for pile foundation construction.
Disclosure of Invention
The invention aims to solve the problems that pile foundation steel casing construction is difficult and slow in progress under bare rock geological conditions, and the bottom opening of the casing is easy to leak slurry or even collapse in the later pile foundation construction process, so that great quality hidden danger is caused to pile foundation construction; the construction method is suitable for the deep water pile foundation steel casing under the bare rock geological condition; the method has the advantages of high installation precision, stable hole opening and high construction speed, improves the pile foundation construction quality under complex conditions, improves the construction efficiency and ensures the construction safety.
The technical scheme of the invention is as follows: a construction method of a deep water pile foundation steel casing suitable for bare rock geological conditions comprises the following steps:
the method comprises the following steps: and (5) erecting a construction trestle and a drilling platform as a platform for the construction of the pile foundation on water.
Step two: and (4) exploring the river bed base, exploring the situation of the river bed base before formal construction, and leveling the river bed base with large unevenness at the pile position.
Step three: and the water-blocking steel protective cylinder is sleeved outside the downward placing sleeve, the size of the protective cylinder can meet the construction space of the bedrock slotting equipment, and the protective cylinder plays a role in guiding and positioning the bedrock slotting construction.
Step four: a rotary drilling rig provides power (torque) for a roller cone drill bit, under the guiding and positioning action of an outer sleeve pile casing, a groove is formed in bedrock to form a circular groove position matched with the size of a construction pile casing, and the depth of the groove is determined according to the water depth and the geological condition.
Step five: after a groove position is formed on the bedrock, the roller cone drill bit is lifted, the construction steel casing is lowered, the construction steel casing is accurately embedded into the cut annular groove position under the guiding of the outer casing, and the construction casing is in place.
Step six: in an annular gap formed between the construction casing and the outer sleeve casing, yellow clay is put down by a guide pipe to seal and fill a gap between the construction casing and a bare rock groove position, so that the sealing effect of the bottom of the construction casing is formed.
Step seven: and pulling out the outer sleeve protection barrel, moving the outer sleeve protection barrel and the equipment to the next hole site, and sequentially and circularly finishing the construction of the protection barrels at other hole sites.
The roller cone drill bit is a roller cone drill bit of a rotary drilling rig, the lower part of the roller cone drill bit is provided with high-strength roller cones in a tooth-shaped staggered arrangement, and a circular groove-shaped structure is formed on bedrock along with the rotary drilling of the roller cone drill bit in the rotary drilling rig.
The sealing and filling material adopts underwater concrete to replace clay to seal and fill the gap between the construction casing and the bare rock slot position when the clay effect is not good, and seals the bottom of the construction casing.
The construction method has the beneficial effects that the construction method of the deep-water pile foundation steel casing under the bare rock geological condition can quickly complete the construction of the pile foundation steel casing under the difficult construction conditions of bare rock, deep water and the like, and the pile foundation construction casing can accurately extend into the stable bedrock, so that the construction quality of the pile foundation is effectively guaranteed; the investment equipment is less, the construction process is safe and reliable, the construction period is short, and the economic benefit is good.
Description of the drawings:
the invention is further explained below with reference to the drawings and the embodiments;
FIG. 1 is an elevational view showing the positional relationship between an outer casing and a construction casing according to the present invention;
FIG. 2 is a top view of the outer casing and the construction casing of FIG. 1;
FIG. 3 is a flow chart of a construction process;
in the figure: 1. the method comprises the following steps of (1) coating a casing, 2. constructing the casing, 3. drilling a platform surface, 4. constructing a water surface, 5. bare rock riverbed top surface and 6. clay sealing layer.
The specific implementation mode is as follows:
in the embodiment of fig. 1, 2 and 3 provided by the invention, the outer sleeve casing 1 is a round steel casing, the wall thickness can be determined according to construction conditions, and the outer sleeve casing can be made of a steel plate with the thickness of 16-25mm generally, and the outer sleeve casing has the functions of blocking the influence of water flow on the roller cone drill bit and guiding and positioning the drill bit.
The construction casing 2 is a steel round casing and is used as a casing structure for pile foundation main body construction.
The size of the cone drum drill bit can be matched with that of the construction pile casing, the rotary drilling rig provides power for the cone drum drill bit to pressurize and rotate the drill bit, the rock surface is cut to form an annular groove position, and the construction pile casing can just fall into the annular groove position.
The method for constructing the bare rock deepwater pile foundation casing comprises the following steps:
the method comprises the following steps: and (5) erecting a construction trestle and a drilling platform to form a drilling platform surface 3.
Step two: and (4) checking the condition of the river bed base, and leveling the pile position with obvious height difference by adopting measures such as a mechanical grab bucket and the like.
Step three: the outer casing protection barrel 1 is put down, and the bottom of the outer casing protection barrel is arranged on the top surface 5 of the bare rock riverbed.
Step four: the rotary drilling rig provides power (torque), a roller cone drill bit is adopted to cut a groove under the guiding action of an outer sleeve protective sleeve, an annular groove matched with the construction protective sleeve is formed within a certain depth range below the top surface 5 of the bare rock riverbed, the depth of the groove can be determined according to the water depth and the bedrock property, the groove depth is generally not less than 1.5m, and the groove width is preferably 10-15 cm.
Step five: the roller cone drill bit is taken out, the construction pile casing 2 is placed by utilizing the guiding effect of the outer sleeve pile casing 1, the construction pile casing 2 is embedded into the annular groove, the bare rock geology has the barrier to the outer sleeve pile casing, no other sundries are left in the groove after the drill bit is withdrawn, and the construction pile casing can be stably and quickly embedded into the groove.
Step six: in the annular clearance that overcoat protects a section of thick bamboo 1 and a construction and protects a section of thick bamboo 2 formation, utilize the pipe to send clay into the construction and protect a section of thick bamboo and the clearance of basement rock trench in, form clay shutoff layer 6, further prevent to protect a section of thick bamboo bottom to leak thick liquid infiltration.
Step seven: and (3) pulling out the outer sleeve pile casing 1, moving the outer sleeve pile casing 1, the roller cone drill bit and other pile casing construction equipment together to a next hole site for construction, and circularly constructing other hole sites in sequence.
In the construction method, when the clay effect is poor, the underwater concrete is adopted to replace the clay to seal and fill the gap between the construction casing and the bare rock slot position, and the bottom of the construction casing is sealed.
Claims (2)
1. A construction method of a deep water pile foundation steel casing suitable for bare rock geological conditions; the method is characterized in that: the construction steps are as follows:
the method comprises the following steps: building a construction trestle and a drilling platform as a platform for the construction of the pile foundation on water;
step two: exploring the river bed base, exploring the situation of the river bed base before formal construction, and leveling the river bed base with large unevenness at the pile position;
step three: a water-blocking steel casing is externally sleeved downwards, the size of the casing can meet the construction space of bedrock slotting equipment, and the casing plays a role in guiding and positioning the bedrock slotting construction;
step four: a rotary drilling rig provides power for a roller cone drill bit, under the guiding and positioning action of an outer sleeve pile casing, grooves are formed in bedrock to form circular groove positions matched with the construction pile casing in size, and the groove cutting depth is determined according to the water depth and the geological condition;
step five: after a groove position is formed on the bedrock, lifting a roller cone drill bit, and lowering a construction steel casing, wherein the construction steel casing is accurately embedded into the cut annular groove position under the guidance of an outer casing, and the construction casing is in place;
step six: in an annular gap formed between the construction casing and the outer sleeve casing, yellow clay is put down by a guide pipe to seal and fill the gap between the construction casing and the bare rock groove position, and the bottom of the construction casing is sealed;
step seven: and pulling out the outer sleeve protection barrel, moving the outer sleeve protection barrel and the equipment to the next hole site, and sequentially and circularly finishing the construction of the protection barrels at other hole sites.
2. The construction method of the deep water pile foundation steel casing applicable to the bare rock geological condition according to claim 1; the method is characterized in that: and underwater concrete replaces clay to seal and fill the gap between the construction pile casing and the bare rock slot, and the bottom of the construction pile casing is sealed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010951000.5A CN112031017A (en) | 2020-09-11 | 2020-09-11 | Construction method suitable for deep water pile foundation steel casing under bare rock geological condition |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010951000.5A CN112031017A (en) | 2020-09-11 | 2020-09-11 | Construction method suitable for deep water pile foundation steel casing under bare rock geological condition |
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| CN112031017A true CN112031017A (en) | 2020-12-04 |
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| CN202010951000.5A Pending CN112031017A (en) | 2020-09-11 | 2020-09-11 | Construction method suitable for deep water pile foundation steel casing under bare rock geological condition |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113293792A (en) * | 2021-05-31 | 2021-08-24 | 中国电建集团福建省电力勘测设计院有限公司 | Construction method of bored pile based on inclined pile in offshore wind power weathering soil layer |
| CN113338284A (en) * | 2021-07-08 | 2021-09-03 | 浙江易通特种基础工程股份有限公司 | Construction method for implanting large-diameter permanent steel casing into deep-water inclined bare rock |
| CN113737839A (en) * | 2021-08-10 | 2021-12-03 | 广东华蕴海上风电科技有限公司 | Offshore wind power rock-socketed single pile construction method based on double pile casing structure and soft soil layer |
| CN114215049A (en) * | 2021-12-09 | 2022-03-22 | 中铁大桥局集团第五工程有限公司 | Construction method for main steel casing of bored pile under deep water foundation and bare rock environment |
| CN114250771A (en) * | 2022-01-04 | 2022-03-29 | 李亮 | Rock stratum steel casing inserting and punching method |
| CN116856408A (en) * | 2023-09-04 | 2023-10-10 | 中交第一航务工程局有限公司 | Sinking method of steel casing suitable for deepwater bare rock area |
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| CN108560543A (en) * | 2018-05-30 | 2018-09-21 | 中国二十二冶集团有限公司 | Underwater cast-in-place pile casing construction method |
| CN110359476A (en) * | 2019-07-04 | 2019-10-22 | 中铁七局集团有限公司 | A kind of construction method of steel sheet-pile cofferdam inner support and drilled pile steel pile casting installation operation platform |
| CN111608173A (en) * | 2020-06-04 | 2020-09-01 | 石家庄铁道大学 | Construction method and device for deep water steep slope bare rock drilled pile |
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| CN201649080U (en) * | 2010-02-26 | 2010-11-24 | 浙江台州甬台温高速公路有限公司 | Steel casing favorable for stable submerging on underwater bare rock surface |
| CN206646541U (en) * | 2017-03-30 | 2017-11-17 | 福建省水利水电勘测设计院（水利部福建水利水电勘测设计研究院） | A kind of embedding rock single-pile foundation of batholith sea bed offshore wind turbine |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113293792A (en) * | 2021-05-31 | 2021-08-24 | 中国电建集团福建省电力勘测设计院有限公司 | Construction method of bored pile based on inclined pile in offshore wind power weathering soil layer |
| CN113293792B (en) * | 2021-05-31 | 2022-05-24 | 中国电建集团福建省电力勘测设计院有限公司 | Construction method of bored pile based on inclined pile in offshore wind power weathering soil layer |
| CN113338284A (en) * | 2021-07-08 | 2021-09-03 | 浙江易通特种基础工程股份有限公司 | Construction method for implanting large-diameter permanent steel casing into deep-water inclined bare rock |
| CN113737839A (en) * | 2021-08-10 | 2021-12-03 | 广东华蕴海上风电科技有限公司 | Offshore wind power rock-socketed single pile construction method based on double pile casing structure and soft soil layer |
| CN114215049A (en) * | 2021-12-09 | 2022-03-22 | 中铁大桥局集团第五工程有限公司 | Construction method for main steel casing of bored pile under deep water foundation and bare rock environment |
| CN114250771A (en) * | 2022-01-04 | 2022-03-29 | 李亮 | Rock stratum steel casing inserting and punching method |
| CN116856408A (en) * | 2023-09-04 | 2023-10-10 | 中交第一航务工程局有限公司 | Sinking method of steel casing suitable for deepwater bare rock area |
| CN116856408B (en) * | 2023-09-04 | 2023-11-07 | 中交第一航务工程局有限公司 | Sinking method of steel casing suitable for deepwater bare rock area |
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Application publication date: 20201204 |