CN111576397A - Rapid construction method for drilled secant pile under complex geology - Google Patents
Rapid construction method for drilled secant pile under complex geology Download PDFInfo
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- CN111576397A CN111576397A CN202010450156.5A CN202010450156A CN111576397A CN 111576397 A CN111576397 A CN 111576397A CN 202010450156 A CN202010450156 A CN 202010450156A CN 111576397 A CN111576397 A CN 111576397A
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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
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- 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
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- Life Sciences & Earth Sciences (AREA)
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- Piles And Underground Anchors (AREA)
Abstract
A quick construction method for a bored secant pile under complex geology belongs to the technical field of foundation pit enclosure construction, and solves the problem that construction efficiency is low due to the limitation of the height complexity and construction process of underground strata in the prior art.
Description
Technical Field
The invention belongs to the technical field of building construction, and particularly relates to a rapid construction method for a drilled secant pile under complex geology.
Background
The secant pile is a foundation pit support structure which is formed by mutually secant arrangement between piles, the arrangement mode of the piles is that one non-reinforced plain concrete pile and one reinforced concrete pile are arranged in a staggered mode, and mutually overlapped concrete parts exist between adjacent piles, so that the secant pile with the functions of retaining soil and stopping water is played.
Disclosure of Invention
In order to solve the problems, the invention designs a rapid construction method of the drilled secant pile for complex geology, which can be used for pre-filling a construction site before construction, changing and filling a stratum with higher construction difficulty and improving the construction efficiency of the secant pile.
The invention adopts the technical scheme that the invention designs a rapid construction method of a drilled secant pile for complex geology, which comprises secant piles formed by mutually secant plain concrete piles and reinforced concrete piles which are alternately arranged in sequence,
a, precasting a construction site;
pre-surveying the geological conditions of a construction site, and excavating and pre-surveying by adopting a rotary drilling rig to drill X pile positions at intervals along the construction trend of the occlusive piles by using a cylindrical drill in the construction area, wherein the pre-surveying depth is M meters;
b, replacing and filling the stratum of the construction site;
according to the pre-surveying result, the stratum of the required construction site is changed and filled, and the guide wall construction is carried out according to the construction requirement;
c, drilling holes to take out soil, and embedding a pile casing;
after drilling and soil taking are carried out by a rotary drilling rig in a barrel drill mode on a construction site, hoisting and protecting a barrel, embedding to form a first plain concrete pile hole, carrying out concrete pouring on the first plain concrete pile hole to form a first plain concrete pile, drilling and soil taking at a specified interval adjacent to the first plain concrete pile, embedding the hoisting and protecting barrel to form a second plain concrete pile hole, and carrying out concrete pouring on the second plain concrete pile hole to form a second plain concrete pile;
d, pulling out the pile casing, drilling a hole between the first plain concrete pile and the second plain concrete pile after the plain concrete pile is initially set to take out soil to form a first reinforced concrete pile hole, hoisting a reinforcement cage in the first reinforced concrete pile hole and performing concrete pouring to form a first reinforced concrete pile;
e, drilling at a specified interval adjacent to the second plain concrete pile to form a third plain concrete pile hole, then embedding a pile casing, and pouring concrete in the third plain concrete pile hole to form a third plain concrete pile;
f, pulling out the pile casing, drilling a hole between the second plain concrete pile and the third plain concrete pile to take out soil to form a second reinforced concrete pile hole, hoisting a reinforcement cage in the second reinforced concrete pile hole and pouring concrete to form a second reinforced concrete pile;
and G, repeating the step E and the step F until all the occlusive piles are completely finished.
The concrete is C25 underwater concrete, and after the plain concrete pile is initially set, when the strength reaches more than 2MPa, the reinforced concrete pile is drilled and subjected to soil taking.
X is 5, and M is 6.
The cylindrical drill comprises a cylinder body, a connecting device arranged at the upper end of the cylinder body and a drill bit arranged at the lower end of the cylinder body, wherein the cylinder body is of a cylindrical structure with the upper end closed, and a spiral retaining sheet in the shape of a spiral conveyer is arranged on the inner wall of the cylinder body.
The barrel inner wall still be provided with the mounting groove of spiral separation blade looks adaptation, the mounting groove be the fixed spiral separation blade of U type slot structure centre gripping.
The mounting groove penetrates through the side wall of the mounting groove by means of bolts and is in bolted connection with the spiral baffle.
The outer wall of the cylinder body is provided with a through hole penetrating through the cylinder body.
The invention has the beneficial effects that the rapid construction method of the drilled secant pile for the complex geology is designed, the construction site is pre-arranged before construction, the stratum with higher construction difficulty is filled, a pile grinding machine is not used, the bottom end of the protective cylinder is firstly pressed into the stratum by a pressurizer, a rotary drilling rig is adopted to drill a hole by a cylinder drill to take earth, when the drilling depth of the cylinder drill to the stratum is 3-6m, the protective cylinder is pressed by the pressurizer again, the operation is circulated until the protective cylinder reaches the specified depth, no sleeve advance is needed, no full sleeve drilling rig is needed to be put in, the protective cylinder is only embedded, and the rotary drilling rig is adopted, so that the construction efficiency of the secant pile is greatly improved, and the construction cost is reduced.
Drawings
FIG. 1 is a schematic representation of the steps of the present invention;
fig. 2 is a schematic view of a structure of the barrel drill.
In the attached drawing, the device comprises a cylinder body 1, a cylinder body 2, a spiral retaining piece 3 and an installation groove.
Detailed Description
As shown in the attached figure 1, the rapid construction method of the drilled secant pile for the complex geology comprises the secant pile formed by mutually secant plain concrete piles and reinforced concrete piles which are sequentially and alternately arranged,
a, precasting a construction site;
pre-surveying the geological conditions of a construction site, and excavating and pre-surveying by adopting a rotary drilling rig to drill X pile positions at intervals along the construction trend of the occlusive piles by using a cylindrical drill in the construction area, wherein the pre-surveying depth is M meters;
b, replacing and filling the stratum of the construction site;
according to the pre-surveying result, the stratum of the required construction site is changed and filled, and the guide wall construction is carried out according to the construction requirement;
c, drilling holes to take out soil, and embedding a pile casing;
after drilling and soil taking are carried out by a rotary drilling rig in a barrel drill mode on a construction site, hoisting and protecting a barrel, embedding to form a first plain concrete pile hole, carrying out concrete pouring on the first plain concrete pile hole to form a first plain concrete pile, drilling and soil taking at a specified interval adjacent to the first plain concrete pile, embedding the hoisting and protecting barrel to form a second plain concrete pile hole, and carrying out concrete pouring on the second plain concrete pile hole to form a second plain concrete pile;
d, pulling out the pile casing, drilling a hole between the first plain concrete pile and the second plain concrete pile after the plain concrete pile is initially set to take out soil to form a first reinforced concrete pile hole, hoisting a reinforcement cage in the first reinforced concrete pile hole and performing concrete pouring to form a first reinforced concrete pile;
e, drilling at a specified interval adjacent to the second plain concrete pile to form a third plain concrete pile hole, then embedding a pile casing, and pouring concrete in the third plain concrete pile hole to form a third plain concrete pile;
f, pulling out the pile casing, drilling a hole between the second plain concrete pile and the third plain concrete pile to take out soil to form a second reinforced concrete pile hole, hoisting a reinforcement cage in the second reinforced concrete pile hole and pouring concrete to form a second reinforced concrete pile;
and G, repeating the step E and the step F until all the occlusive piles are completely finished.
The method is characterized in that a required construction site is pre-arranged before construction, a stratum with high construction difficulty is replaced, a pile grinding machine is not used any more, the bottom end of a pile casing is pressed into the stratum by means of a pressurizer, a rotary drilling rig is adopted to drill a cylinder to obtain soil, when the depth of the cylinder drill to the stratum is 3-6m, the pile casing is pressed into the pile casing by means of the pressurizer again, the operation is circulated until the pile casing reaches a specified depth, the advance of a casing pipe is not needed, the full casing drilling rig is not needed to be put into, the pile casing is only needed to be buried underground, and a rotary drilling rig is adopted to form holes, so that the construction efficiency of the secant pile.
As shown in fig. 1, the concrete is C25 underwater concrete, and after the plain concrete pile is initially set, when the strength reaches more than 2MPa, the reinforced concrete pile is drilled and the soil is taken.
As shown in the attached figure 1, the plain concrete pile is cast by adopting common underwater concrete, and the construction of the reinforced concrete pile is carried out 12-40 hours after the casting is finished, so that the piping phenomenon of the plain concrete pile is effectively prevented.
X is 6-10, and M is 5-7.
When the construction site is pre-embarked, excavating pre-exploration is carried out along the construction trend of the occlusive piles at intervals of 6-10 pile positions, the pre-exploration depth is 5-7 m, the accuracy of the stratum pre-exploration result can be ensured, and the construction time can not be prolonged due to longer pre-embarked time;
as shown in fig. 2, the barrel drill comprises a barrel body 1, a connecting device arranged at the upper end of the barrel body 1 and a drill bit arranged at the lower end of the barrel body 1, wherein the barrel body 1 is of a tubular structure with a closed upper end, and a spiral blocking piece 2 in the shape of a packing auger is arranged on the inner wall of the barrel body 1.
When drilling and taking soil, a pile grinding machine is not used, but a rotary drilling machine is adopted to carry out construction of a pile hole by matching a cylindrical drill and a protective cylinder, so that the construction efficiency is greatly improved, the construction cost is reduced, but the construction process shows that the mode of taking soil by a grab bucket can consume a large amount of construction time, the spiral retaining sheet 2 is arranged in the cylindrical drill body 1 of the cylindrical drill, the spiral retaining sheet 2 not only can carry out certain stirring on soil, clay, sand and stone and the like in the cylindrical drill body 1 to enable the soil, the clay, the sand and the like to be looser, more soil can be grabbed when the grab bucket carries out soil taking, the working efficiency of taking soil by the grab bucket is improved, the spiral retaining sheet 2 has a certain width, when taking soil after the cylindrical drill is drilled, the cylindrical drill can be pulled out, a large amount of soil, clay, sand and the like can be taken out by the spiral retaining sheet 2, the construction efficiency of taking soil is improved.
As shown in fig. 2, the inner wall of the barrel body 1 is further provided with a mounting groove 3 matched with the spiral retaining piece 2, and the mounting groove 3 is of a U-shaped groove structure and is used for clamping and fixing the spiral retaining piece 2.
As shown in fig. 2, the mounting groove 3 is formed through the sidewall thereof by bolts and bolted to the spiral shielding plate 2.
The screw retaining pieces 2 can be more conveniently detached through the bolt connection, and the screw retaining pieces are simple and easy to operate.
As shown in fig. 2, the outer wall of the cylinder 1 is provided with a through hole penetrating through the cylinder 1.
When a section of thick bamboo bored and taken out in following the drilling, can carry a large amount of soil, clay, gravel and sand etc. on the spiral separation blade 2, the accessible is strikeed, the mode of rocking, makes soil, clay, gravel and sand etc. on the spiral separation blade 2 fall down, when soil, clay, gravel and sand etc. on the spiral separation blade 2 were difficult for falling down, soil, clay, gravel and sand etc. on the outer wall of accessible barrel 1 were clear away on the spiral separation blade 2.
Claims (7)
1. The utility model provides a quick construction method of drilling secant pile for under complicated geology, includes that the secant pile that is formed by plain concrete pile and the mutual interlock of reinforced concrete pile of in proper order alternate arrangement, its characterized in that:
a, precasting a construction site;
pre-surveying the geological conditions of a construction site, and excavating and pre-surveying by adopting a rotary drilling rig to drill X pile positions at intervals along the construction trend of the occlusive piles by using a cylindrical drill in the construction area, wherein the pre-surveying depth is M meters;
b, replacing and filling the stratum of the construction site;
according to the pre-surveying result, the stratum of the required construction site is changed and filled, and the guide wall construction is carried out according to the construction requirement;
c, drilling holes to take out soil, and embedding a pile casing;
after drilling and soil taking are carried out by a rotary drilling rig in a barrel drill mode on a construction site, hoisting and protecting a barrel, embedding to form a first plain concrete pile hole, carrying out concrete pouring on the first plain concrete pile hole to form a first plain concrete pile, drilling and soil taking at a specified interval adjacent to the first plain concrete pile, embedding the hoisting and protecting barrel to form a second plain concrete pile hole, and carrying out concrete pouring on the second plain concrete pile hole to form a second plain concrete pile;
d, pulling out the pile casing, drilling a hole between the first plain concrete pile and the second plain concrete pile after the plain concrete pile is initially set to take out soil to form a first reinforced concrete pile hole, hoisting a reinforcement cage in the first reinforced concrete pile hole and performing concrete pouring to form a first reinforced concrete pile;
e, drilling at a specified interval adjacent to the second plain concrete pile to form a third plain concrete pile hole, then embedding a pile casing, and pouring concrete in the third plain concrete pile hole to form a third plain concrete pile;
f, pulling out the pile casing, drilling a hole between the second plain concrete pile and the third plain concrete pile to take out soil to form a second reinforced concrete pile hole, hoisting a reinforcement cage in the second reinforced concrete pile hole and pouring concrete to form a second reinforced concrete pile;
and G, repeating the step E and the step F until all the occlusive piles are completely finished.
2. The rapid construction method of the drilling occlusive pile for the complex geology according to the claim 1, which is characterized in that: the concrete is C25 underwater concrete, and after the plain concrete pile is initially set, when the strength reaches more than 2MPa, the reinforced concrete pile is drilled and subjected to soil taking.
3. The rapid construction method of the drilling occlusive pile for the complex geology according to the claim 1, which is characterized in that: in the step A, X is 5, and M is 6.
4. The rapid construction method of the drilling occlusive pile for the complex geology according to the claim 1, which is characterized in that: the barrel drill in the step A comprises a barrel body (1), a connecting device arranged at the upper end of the barrel body (1) and a drill bit arranged at the lower end of the barrel body (1), wherein the barrel body (1) is of a cylindrical structure with a closed upper end, and a spiral blocking piece (2) in a packing auger shape is arranged on the inner wall of the barrel body (1).
5. The rapid construction method of the drilling occlusive pile used under the complex geology according to the claim 4, which is characterized in that: barrel (1) inner wall still be provided with mounting groove (3) with spiral separation blade (2) looks adaptation, mounting groove (3) be fixed spiral separation blade (2) of U type slot structure centre gripping.
6. The rapid construction method of the drilling occlusive pile for the complex geology according to the claim 5, which is characterized in that: the mounting groove (3) penetrates through the side wall of the mounting groove by means of bolts and is in bolted connection with the spiral retaining sheet (2).
7. The rapid construction method of the drilling occlusive pile used under the complex geology according to the claim 4, which is characterized in that: the outer wall of the cylinder body (1) is provided with a through hole penetrating through the cylinder body (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010450156.5A CN111576397A (en) | 2020-05-25 | 2020-05-25 | Rapid construction method for drilled secant pile under complex geology |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010450156.5A CN111576397A (en) | 2020-05-25 | 2020-05-25 | Rapid construction method for drilled secant pile under complex geology |
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| CN111576397A true CN111576397A (en) | 2020-08-25 |
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| CN202010450156.5A Pending CN111576397A (en) | 2020-05-25 | 2020-05-25 | Rapid construction method for drilled secant pile under complex geology |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201943581U (en) * | 2010-12-24 | 2011-08-24 | 北京市三一重机有限公司 | Inner spiral drum-type boring tool |
| CN104264663A (en) * | 2014-10-21 | 2015-01-07 | 中煤地质工程总公司北京分公司 | Hard cutting construction technology for secant piles |
| CN105804656A (en) * | 2016-04-28 | 2016-07-27 | 安徽省路港工程有限责任公司 | Drilling massive boulder lifting cylindrical drill |
| CN109025807A (en) * | 2018-08-20 | 2018-12-18 | 中水电第十工程局（郑州）有限公司 | A kind of construction method that rotary drilling rig is crept on complicated geology stratum |
| KR101960499B1 (en) * | 2018-06-27 | 2019-07-15 | 주식회사 대산시빌테크날러지 | Underground column wall construction method using waterstop rubber and waterstop housing, and underground column wall therewith |
-
2020
- 2020-05-25 CN CN202010450156.5A patent/CN111576397A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201943581U (en) * | 2010-12-24 | 2011-08-24 | 北京市三一重机有限公司 | Inner spiral drum-type boring tool |
| CN104264663A (en) * | 2014-10-21 | 2015-01-07 | 中煤地质工程总公司北京分公司 | Hard cutting construction technology for secant piles |
| CN105804656A (en) * | 2016-04-28 | 2016-07-27 | 安徽省路港工程有限责任公司 | Drilling massive boulder lifting cylindrical drill |
| KR101960499B1 (en) * | 2018-06-27 | 2019-07-15 | 주식회사 대산시빌테크날러지 | Underground column wall construction method using waterstop rubber and waterstop housing, and underground column wall therewith |
| CN109025807A (en) * | 2018-08-20 | 2018-12-18 | 中水电第十工程局（郑州）有限公司 | A kind of construction method that rotary drilling rig is crept on complicated geology stratum |
Non-Patent Citations (1)
| Title |
|---|
| 中铁二局股份有限公司等: "《隧道及地铁工程 第2版》", 31 October 2013, 中国铁道出版社 * |
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