CN115110518A - Construction method for underwater strongly weathered rock stratum steel sheet pile by using rotary drilling rig - Google Patents
Construction method for underwater strongly weathered rock stratum steel sheet pile by using rotary drilling rig Download PDFInfo
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- CN115110518A CN115110518A CN202210672157.3A CN202210672157A CN115110518A CN 115110518 A CN115110518 A CN 115110518A CN 202210672157 A CN202210672157 A CN 202210672157A CN 115110518 A CN115110518 A CN 115110518A
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- 238000005553 drilling Methods 0.000 title claims abstract description 54
- 238000010276 construction Methods 0.000 title claims abstract description 47
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 42
- 239000010959 steel Substances 0.000 title claims abstract description 42
- 239000011435 rock Substances 0.000 title claims abstract description 22
- 239000004927 clay Substances 0.000 claims abstract description 35
- 238000000034 method Methods 0.000 claims abstract description 8
- 230000001681 protective effect Effects 0.000 claims 5
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 6
- 239000002689 soil Substances 0.000 description 3
- 230000008093 supporting effect Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000005755 formation reaction Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- E02D5/02—Sheet piles or sheet pile bulkheads
- E02D5/03—Prefabricated parts, e.g. composite sheet piles
- E02D5/04—Prefabricated parts, e.g. composite sheet piles made of steel
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D11/00—Methods or apparatus specially adapted for both placing and removing sheet pile bulkheads, piles, or mould-pipes
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D13/00—Accessories for placing or removing piles or bulkheads, e.g. noise attenuating chambers
- E02D13/04—Guide devices; Guide frames
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/18—Making embankments, e.g. dikes, dams
-
- 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
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- 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
- E21B3/00—Rotary drilling
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- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Geology (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Placing Or Removing Of Piles Or Sheet Piles, Or Accessories Thereof (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention discloses a construction method for an underwater strongly weathered rock stratum steel sheet pile by using a rotary drilling rig, which comprises the following steps: drilling a first large pile casing to form a first backfill hole, inserting a first small pile casing into the first large pile casing, backfilling clay into the first small pile casing, embedding a second large pile casing close to the outer wall of the first small pile casing, drilling a second large pile casing into the second large pile casing to form a second backfill hole, inserting a second small pile casing into the second large pile casing, backfilling clay into the second small pile casing, pulling out the first small pile casing, realizing backfill by clay collapse in the first small pile casing, and repeating the steps to completely replace rock strata at the central position of the steel sheet pile with clay. The invention has the beneficial effects that: the problem that the steel sheet pile must be constructed by using special equipment in a strongly weathered rock stratum is solved, and the conventional process of rotary drilling and construction of pile foundation construction equipment is adopted, so that the investment of the equipment is reduced, and the economic cost is reduced.
Description
Technical Field
The invention belongs to the technical field of bridge construction, and particularly relates to a construction method for underwater strongly weathered rock stratum steel sheet piles by using a rotary drilling rig.
Background
For areas with rich soft soil, mucky soil and underground water and areas with shallow water depth, the steel sheet pile is often used as a supporting structure for foundation pit excavation due to the advantages of low manufacturing cost and convenient construction, but under geological conditions of hard soil layers, strongly weathered rock strata and the like, the steel sheet pile is difficult to insert and beat to the designed depth, and special equipment is generally used for construction or construction methods such as steel pipe piles and steel cofferdams are changed, so that the manufacturing cost is increased, the construction investment is large, the cost is high, and the working efficiency is slow.
Disclosure of Invention
The invention aims to: the invention provides a construction method for underwater strongly weathered rock stratum steel sheet piles by using a rotary drilling rig, which solves the problem of difficulty in constructing the steel sheet piles in special strata, solves the problem that special equipment is required to be used for strongly weathered rock stratum steel sheet piles in the prior art, can directly use equipment (the rotary drilling rig) after pile foundation construction is finished to construct the steel sheet piles, and reduces the investment of construction equipment.
The purpose of the invention is realized by the following technical scheme:
a construction method for underwater strongly weathered rock stratum steel sheet piles by using a rotary drilling rig comprises the following steps:
the method comprises the steps that firstly, the pre-construction position of a steel sheet pile is accurately positioned, a large protection cylinder is embedded in the pre-construction central position of the steel sheet pile, after a first large protection cylinder is embedded, a rotary drilling rig is used for drilling in the first large protection cylinder, and the rotary drilling rig is withdrawn after the first large protection cylinder is drilled to the designed depth to form a first backfill hole;
inserting a first small protecting cylinder from the first large protecting cylinder, inserting the first small protecting cylinder close to the inner wall of the first backfill hole, and backfilling clay in the first small protecting cylinder;
pulling out the first large protection cylinder, embedding a second large protection cylinder close to the outer wall of the first small protection cylinder, after the second large protection cylinder is embedded, drilling in the second large protection cylinder by using a drilling rig, and withdrawing the drilling rig after the drilling is carried out to the designed depth to form a second backfill hole;
inserting a second small protecting cylinder from the second large protecting cylinder, inserting the second small protecting cylinder close to the inner wall of the second large protecting cylinder close to the first small protecting cylinder, and backfilling clay in the second small protecting cylinder;
step five, pulling out the first small protecting cylinder, wherein the clay in the first small protecting cylinder collapses, and backfilling the first backfilling hole;
step six, pulling out the second large protection cylinder, embedding a third large protection cylinder close to the outer wall of the second small protection cylinder, after the third large protection cylinder is embedded, drilling in the third large protection cylinder by using a rotary drilling rig, and withdrawing the rotary drilling rig after the drill hole reaches the designed depth to form a third backfill hole;
step seven, inserting a third small protecting cylinder into the third large protecting cylinder, inserting the third small protecting cylinder close to the inner wall of the third large protecting cylinder, which is close to the inner wall of the second small protecting cylinder, and backfilling clay into the third small protecting cylinder;
step eight, pulling out a second small protecting cylinder, collapsing clay in the second small protecting cylinder, and backfilling a second backfilling hole;
and repeating the construction steps in the sixth step to the eighth step until the last backfill hole is formed, sequentially pulling out the last large pile casing and the last small pile casing, collapsing the clay in the last small pile casing, and backfilling the last backfill hole, so that the rock stratum at the center of the steel sheet pile is completely filled with the clay, and the steel sheet pile construction conditions are met.
Furthermore, when the large protection cylinder is buried, the upper end of the large protection cylinder is higher than the ground surface.
Furthermore, the large pile casing is linearly arranged along the direction of the center position of the steel sheet pile in the pre-construction process.
Furthermore, the depth of the backfill hole is larger than that of the large casing.
Furthermore, when the small protecting cylinder is inserted, the upper end of the small protecting cylinder is higher than the ground surface.
Furthermore, when the small protection cylinder is inserted, the upper end of the small protection cylinder is higher than the upper end of the large protection cylinder.
Further, the clay in the small casing and the clay added outside the small casing are used for backfilling the backfilling holes until the backfilling holes are level to the ground surface.
The invention has the beneficial effects that: the problem that the steel sheet pile must be constructed by using special equipment in a strongly weathered rock stratum is solved, and the conventional process of rotary drilling and construction of pile foundation construction equipment is adopted, so that the investment of the equipment is reduced, and the economic cost is reduced.
The main scheme and the further selection schemes can be freely combined to form a plurality of schemes which are all adopted and claimed by the invention; in the invention, the selection (each non-conflict selection) and other selections can be freely combined. The skilled person in the art can understand that there are many combinations, which are all the technical solutions to be protected by the present invention, according to the prior art and the common general knowledge after understanding the scheme of the present invention, and the technical solutions are not exhaustive herein.
Drawings
FIG. 1 is a schematic construction diagram of step one of the present invention.
FIG. 2 is a schematic construction diagram of step two of the present invention.
FIG. 3 is a schematic view of the construction in step three of the present invention.
FIG. 4 is a construction diagram of step four of the present invention.
FIG. 5 is a schematic construction diagram of step five of the present invention.
FIG. 6 is a schematic construction diagram of step six of the present invention.
FIG. 7 is a schematic view of the process of step seven of the present invention.
FIG. 8 is a construction diagram of step eight of the present invention.
Fig. 9 is a completion schematic of the present invention.
In the figure: 1-large protection cylinder, 2-backfill hole, 3-small protection cylinder and 4-clay.
Detailed Description
The following non-limiting examples serve to illustrate the invention.
Example 1:
a construction method for underwater strongly weathered rock stratum steel sheet piles by using a rotary drilling rig adopts a large pile casing 1 with the diameter of 1.6 meters, the rotary drilling rig with the drill bit diameter of 1.4 meters and a small pile casing 3 with the diameter of 1 meter, and comprises the following steps.
Referring to fig. 1, in the first step, initial positioning is performed, a guide frame is arranged on a steel trestle to accurately position the pre-construction position of a steel sheet pile, a large protection cylinder 1 is embedded at the pre-construction central position of the steel sheet pile, after the first large protection cylinder 1 is embedded, a rotary drilling rig on the trestle is used for drilling in the first large protection cylinder 1, and the rotary drilling rig withdraws after drilling to the designed depth to form a first backfill hole 2.
Referring to fig. 2, in step two, a first small casing 3 is inserted from a first large casing 1, the first small casing 3 is inserted closely to the left inner wall of the first backfill hole 2, and clay 4 is backfilled in the first small casing 3.
Referring to fig. 3, in the third step, the first large protection cylinder 1 is pulled out, the second large protection cylinder 1 is embedded closely to the right outer wall of the first small protection cylinder 3, after the second large protection cylinder 1 is embedded, a drilling rig is used for drilling in the second large protection cylinder 1, and the drilling rig withdraws after the drilling reaches the designed depth to form a second backfill hole 2.
Referring to fig. 4, in step four, a second small casing 3 is inserted from the second large casing 1, the second small casing 3 is inserted closely to the left inner wall of the second large casing 1 close to the first small casing 3, and clay 4 is backfilled in the second small casing 3.
Referring to fig. 5, step five, the first small casing 3 is pulled out, the clay 4 in the first small casing 3 collapses, and the first backfill hole 2 is backfilled.
Referring to fig. 6, in a sixth step, the second large protection cylinder 1 is pulled out, the third large protection cylinder 1 is embedded closely to the right outer wall of the second small protection cylinder 3, after the third large protection cylinder 1 is embedded, a rotary drilling rig is used for drilling in the third large protection cylinder 1, and the rotary drilling rig withdraws after the drill hole is drilled to the designed depth to form a third backfill hole 2.
Referring to fig. 7, in step seven, a third small casing 3 is inserted into the third large casing 1, the third small casing 3 is inserted closely to the left inner wall of the third large casing 1 close to the second small casing 3, and clay 4 is backfilled in the third small casing 3.
Referring to fig. 8, in step eight, the second small protecting cylinder 3 is pulled out, the clay 4 in the second small protecting cylinder 3 collapses, and the second backfill hole 2 is backfilled.
Referring to fig. 9, the construction steps in the sixth to eighth steps are repeated until the last backfill hole 2, the last large casing 1 and the last small casing 3 are sequentially pulled out, the clay 4 in the last small casing 3 is collapsed, and the last backfill hole 2 is backfilled, so that all rock formations at the center of the steel sheet pile are filled with clay, and the steel sheet pile construction conditions are met.
When the large protection barrel 1 is buried, the upper end of the large protection barrel 1 is higher than the ground surface, so that the enclosure supporting effect of the large protection barrel 1 on the drilled hole is ensured. The depth of the backfill hole 2 is greater than that of the large pile casing 1, so that the backfill hole is ensured to have large depth to meet the supporting requirement of the steel sheet pile in the later period.
When the small protection barrel 3 is inserted, the upper end of the small protection barrel 3 is higher than the upper end of the large protection barrel 1, so that the small protection barrel 3 is convenient to operate. And the clay 4 in the small protecting cylinder 3 and the clay 4 added outside the small protecting cylinder are used for backfilling the backfilling hole 2 until the backfilling hole is level with the ground surface, so that the backfilling hole is prevented from being filled with insufficient clay 4 in the small protecting cylinder 3.
The large pile casing 1 is linearly arranged along the direction of the center position of the steel sheet pile in the pre-construction process to form a linear backfill clay section, and the steel sheet pile can be constructed on the basis of the clay section in the later period.
The foregoing basic embodiments of the invention and their various further alternatives can be freely combined to form multiple embodiments, all of which are contemplated and claimed herein. In the scheme of the invention, each selection example can be combined with any other basic example and selection example at will.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.
Claims (7)
1. A construction method for underwater strongly weathered rock stratum steel sheet piles by using a rotary drilling rig is characterized by comprising the following steps:
the method comprises the steps that firstly, the pre-construction position of a steel sheet pile is accurately positioned, a large protection cylinder (1) is buried in the pre-construction central position of the steel sheet pile, after the first large protection cylinder (1) is buried, a rotary drilling rig is used for drilling in the first large protection cylinder (1), and the rotary drilling rig is withdrawn after the drill hole reaches the designed depth to form a first backfill hole (2);
secondly, inserting a first small protecting cylinder (3) from the first large protecting cylinder (1), inserting the first small protecting cylinder (3) close to the inner wall of the first backfill hole (2), and backfilling clay (4) in the first small protecting cylinder (3);
pulling out the first large protecting cylinder (1), embedding the second large protecting cylinder (1) closely attached to the outer wall of the first small protecting cylinder (3), after the second large protecting cylinder (1) is embedded, drilling in the second large protecting cylinder (1) by using a drilling and digging drilling machine, and withdrawing the drilling and digging drilling machine after drilling to the designed depth to form a second backfill hole (2);
inserting a second small protecting cylinder (3) from the second large protecting cylinder (1), inserting the second small protecting cylinder (3) close to the inner wall of the second large protecting cylinder (1) close to the first small protecting cylinder (3), and backfilling clay (4) in the second small protecting cylinder (3);
fifthly, pulling out the first small protecting cylinder (3), collapsing the clay (4) in the first small protecting cylinder (3), and backfilling the first backfilling hole (2);
sixthly, pulling out the second large protection cylinder (1), embedding a third large protection cylinder (1) closely attached to the outer wall of the second small protection cylinder (3), after the third large protection cylinder (1) is embedded, drilling in the third large protection cylinder (1) by using a rotary drilling rig, and withdrawing the rotary drilling rig after drilling to the designed depth to form a third backfill hole (2);
seventhly, inserting a third small protecting cylinder (3) into the third large protecting cylinder (1), inserting the third small protecting cylinder (3) close to the inner wall of the third large protecting cylinder (1) close to the second small protecting cylinder (3), and backfilling clay (4) into the third small protecting cylinder (3);
step eight, pulling out the second small protecting cylinder (3), collapsing the clay (4) in the second small protecting cylinder (3), and backfilling the second backfilling hole (2);
and repeating the construction steps in the sixth step to the eighth step until the last backfill hole (2), sequentially pulling out the last large pile casing (1) and the small pile casing (3), caving the clay (4) in the last small pile casing (3), and backfilling the last backfill hole (2), so that all rock stratums at the center of the steel sheet pile are replaced by the clay, and the construction conditions of the steel sheet pile are met.
2. The construction method for the underwater strongly weathered rock stratum steel sheet pile by using the rotary drilling rig according to claim 1, is characterized in that: when the large protection cylinder (1) is buried, the upper end of the large protection cylinder (1) is higher than the ground surface.
3. The construction method for the underwater strongly weathered rock stratum steel sheet pile by using the rotary drilling rig according to claim 1 or 2, is characterized in that: the large pile casing (1) is arranged linearly along the direction of the center position of the steel sheet pile in the pre-construction process.
4. The construction method for the underwater strongly weathered rock stratum steel sheet pile by using the rotary drilling rig according to claim 1 or 2, is characterized in that: the depth of the backfill hole (2) is larger than that of the large protection cylinder (1).
5. The construction method for the underwater strongly weathered rock stratum steel sheet pile by using the rotary drilling rig according to claim 1, is characterized in that: when the small protective barrel (3) is inserted, the upper end of the small protective barrel (3) is higher than the ground surface.
6. The construction method for the underwater strongly weathered rock stratum steel sheet pile by using the rotary drilling rig according to claim 1 or 5, is characterized in that: when the small protective cylinder (3) is inserted, the upper end of the small protective cylinder (3) is higher than the upper end of the large protective cylinder (1).
7. The construction method for the underwater strongly weathered rock stratum steel sheet pile by using the rotary drilling rig according to claim 1, is characterized in that: and the clay (4) in the small pile casing (3) and the clay (4) added outside are used for backfilling the backfill hole (2) until the backfill hole is level with the ground surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210672157.3A CN115110518B (en) | 2022-06-15 | 2022-06-15 | Method for constructing underwater strong weathered rock stratum steel sheet pile by using rotary drilling rig |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210672157.3A CN115110518B (en) | 2022-06-15 | 2022-06-15 | Method for constructing underwater strong weathered rock stratum steel sheet pile by using rotary drilling rig |
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| CN115110518A true CN115110518A (en) | 2022-09-27 |
| CN115110518B CN115110518B (en) | 2024-06-25 |
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| CN115110518B (en) | 2024-06-25 |
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