CN113445901A - Construction method for long-period precipitation of hard soil layer - Google Patents
Construction method for long-period precipitation of hard soil layer Download PDFInfo
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- CN113445901A CN113445901A CN202110625433.6A CN202110625433A CN113445901A CN 113445901 A CN113445901 A CN 113445901A CN 202110625433 A CN202110625433 A CN 202110625433A CN 113445901 A CN113445901 A CN 113445901A
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- precipitation
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- 238000001556 precipitation Methods 0.000 title claims abstract description 53
- 238000010276 construction Methods 0.000 title claims abstract description 26
- 239000002689 soil Substances 0.000 title claims abstract description 17
- 238000005553 drilling Methods 0.000 claims abstract description 32
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000000034 method Methods 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 238000010586 diagram Methods 0.000 claims abstract description 7
- 238000004140 cleaning Methods 0.000 claims abstract description 6
- 239000002893 slag Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 abstract description 4
- 239000003673 groundwater Substances 0.000 abstract 1
- 239000011435 rock Substances 0.000 description 3
- 238000013461 design Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000010802 sludge Substances 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
Images
Classifications
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- 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
- E21B4/00—Drives for drilling, used in the borehole
- E21B4/06—Down-hole impacting means, e.g. hammers
- E21B4/14—Fluid operated hammers
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D19/00—Keeping dry foundation sites or other areas in the ground
- E02D19/06—Restraining of underground water
- E02D19/10—Restraining of underground water by lowering level of ground water
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/10—Improving by compacting by watering, draining, de-aerating or blasting, e.g. by installing sand or wick drains
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- 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
- E21B10/00—Drill bits
- E21B10/36—Percussion drill bits
-
- 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
- E21B10/00—Drill bits
- E21B10/36—Percussion drill bits
- E21B10/40—Percussion drill bits with leading portion
-
- 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
- E21B17/10—Wear protectors; Centralising devices, e.g. stabilisers
- E21B17/1078—Stabilisers or centralisers for casing, tubing or drill pipes
-
- 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
- E21B41/00—Equipment or details not covered by groups E21B15/00 - E21B40/00
-
- 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
- E21B7/04—Directional drilling
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Structural Engineering (AREA)
- Paleontology (AREA)
- General Engineering & Computer Science (AREA)
- Civil Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Soil Sciences (AREA)
- Agronomy & Crop Science (AREA)
- Earth Drilling (AREA)
Abstract
The invention discloses a construction method for long-period precipitation of a hard soil layer. The method comprises the following steps: measuring and setting out according to the coordinates and the dewatering well plane arrangement diagram, and determining the central line of the dewatering well; leveling a construction area site, and installing a drilling machine to a preset position; installing a down-the-hole hammer at the lowest end of a drill rod on a drilling machine, wherein the down-the-hole hammer is connected with a guide device, and a casing shoe and a bridge type water filter pipe are coated outside the down-the-hole hammer; after the down-the-hole hammer drills into a preset stratum, the drilling tool is converged to be taken out of the bridge type water filtering pipe, and the drilling tool is withdrawn out of the hole; and cleaning the precipitation well and putting the water suction pump into the precipitation well, so that long-period precipitation can be carried out according to the designed precipitation scheme. By adopting the technical scheme, the problem that the service life and the precipitation effect of the conventional precipitation well cannot be guaranteed in the long-period continuous precipitation area is solved, and the groundwater precipitation work in the long-period continuous precipitation area can be ensured.
Description
Technical Field
The invention relates to the technical field of concrete maintenance in alpine regions, in particular to a construction method for long-period precipitation of a hard soil layer.
Background
Along with the development of social economy, engineering construction is more and more frequent, the construction depth is gradually increased, and the construction technology is also continuously improved. In order to ensure normal construction in the construction process, the underground water needs to be subjected to precipitation treatment according to design requirements.
In recent years, more and more buildings are built in mountainous regions, one of the characteristics of the fields is that soil layers are hard, and hole collapse is easy to occur in the conventional drilling process in the areas such as pebbles, broken stones and the like, so that most of the projects adopt a pipe-following drilling mode to avoid accidents. The drilling process is carried out in the areas, and the conventional drilling hole-forming process is adopted, so that the drilling efficiency is low, the hole-forming efficiency is slow, and the construction period is long. In this situation, the down-the-hole hammer drilling process is receiving increasing attention and application, and due to the fact that the down-the-hole hammer drills hard rock layers and pebble layers, drilling efficiency can be improved by several times to dozens of times compared with conventional rotary drilling and mechanical impact drilling.
For some special building designs, not only the site is special, but also the duration of the precipitation period is long, and the service life and the precipitation effect cannot be guaranteed by the conventional precipitation well pipe. This makes it a great challenge how hard soil layers can achieve long periods of precipitation.
Disclosure of Invention
The invention aims to provide a construction method for long-period precipitation of a hard soil layer, and solves the problem that the service life and precipitation effect of the conventional precipitation well cannot be guaranteed in a long-period continuous precipitation area.
In order to achieve the purpose, the technical scheme of the invention is as follows: a construction method for long-period precipitation of a hard soil layer comprises the following steps:
s102, measuring and setting out according to the coordinates and the dewatering well plane arrangement diagram, determining a dewatering well central line, and marking the position of the dewatering well according to the central line;
s104, leveling a construction area field, and installing a down-the-hole hammer drill to a preset position; the down-the-hole hammer drill is connected with a pilot device, and a drill bit of the down-the-hole hammer drill is also covered with a casing shoe and a bridge type water filter pipe connected with the casing shoe; the inner diameters of the casing shoe and the bridge type strainer are larger than the outer diameter of the drilling tool;
s106, after the down-the-hole hammer drill drills into a preset stratum, the drilling tool is converged to be taken out of the bridge type water filtering pipe, and the drilling tool is withdrawn out of the hole, so that the bridge type water filtering pipe can be left in the precipitation well;
and S108, cleaning the precipitation well, and putting the water pump into the precipitation well, so that long-period precipitation can be carried out according to the designed precipitation scheme.
Furthermore, the down-the-hole hammer drill is a pneumatic down-the-hole hammer drill.
Through the arrangement, the diameter of the dewatering well can be enlarged by utilizing the eccentric drill bit of the wind tunnel down-the-hole hammer, and the bridge type strainer can be ensured to follow up smoothly.
Further, when the drilling machine is installed and aligned in step S104, the vertical and horizontal errors of the hole positions should not exceed ± 50 mm.
Through the arrangement, the alignment can be accurate and the pore-forming quality can be ensured.
Further, the method comprises the step S105 that hole cleaning and slag discharging are needed once when the down-the-hole hammer drill drills 0.3m-0.5 m.
Through the arrangement, the condition that the drilling rate is influenced by excessive slag can be avoided, and the working efficiency of the scheme is improved.
Further, the water pump in the step S108 is placed 1.0-2.0m away from the bottom of the precipitation well.
Through the arrangement, the situation that the water pump is blocked by sludge is avoided, and the stability of the scheme is maintained.
Compared with the prior art, the beneficial effect of this scheme: the construction period is shortened, the pore-forming efficiency is improved, and the quality of long-period precipitation can be ensured.
Drawings
FIG. 1 is a schematic structural diagram of a drill in a furled state in a construction method of long-period precipitation of hard soil layers;
FIG. 2 is a schematic structural diagram of the working state of a drilling machine in the construction method of long-period precipitation of hard soil layers;
fig. 3 is a schematic structural diagram of the bottom of the drilling machine in the construction method of the hard soil layer long-period precipitation.
Detailed Description
The present invention will be described in further detail below by way of specific embodiments:
reference numerals in the drawings of the specification include: the drilling machine comprises a down-the-hole hammer drilling machine 1, an eccentric drill bit 2, a pilot 3, a casing shoe 4, a bridge type strainer 5, metal teeth 6 and a slag discharge hole 7.
Examples
As shown in figures 1 to 3: a construction method for long-period precipitation of a hard soil layer comprises the following steps:
s102, measuring and setting out according to the coordinates and the dewatering well plane arrangement diagram, determining the central line of the dewatering well, marking the position of the dewatering well according to the central line, and making corresponding marks.
S104, leveling the site of the construction area manually or mechanically so that the down-the-hole hammer drill 1 can reach a designated position, and ensuring that the longitudinal and transverse errors of hole positions do not exceed +/-50 mm after the down-the-hole hammer drill 1 is aligned. In the embodiment, the down-the-hole hammer drilling machine 1 adopts a pneumatic down-the-hole hammer, and the diameter of the dewatering well can be enlarged by means of the deviation of the eccentric drill bit 2 of the pneumatic down-the-hole hammer. The lower side of the down-the-hole hammer drilling machine 1 is connected with a guide device 3, a casing shoe 4 and a bridge type water filtering pipe 5 fixedly connected with the casing shoe 4 are further coated outside the guide device 3, a convex shoulder of the guide device 3 is abutted to a convex shoulder of the casing shoe 4, so that the drill pressure and shock wave parts of the guide device 3 are transmitted to the casing shoe 4, the casing shoe 4 is forced to drive the bridge type water filtering pipe 5 to synchronously follow up with the down-the-hole hammer drilling machine 1, and the inner diameters of the casing shoe 4 and the bridge type water filtering pipe 5 are larger than the outer diameter of the down-the-hole hammer drilling machine 1.
S105, cleaning and deslagging once the down-the-hole hammer drill 1 drills 0.3m-0.5 m.
S106, after the down-the-hole hammer drill 1 drills into a preset stratum, the eccentric drill bit 2 is converged to be taken out of the casing shoe 4 and the bridge type water filter pipe 5, the down-the-hole hammer drill 1 is completely withdrawn out of the hole, and the bridge type water filter pipe 5 can be left in the precipitation well, so that the well wall of the precipitation well is supported by means of the bridge type water filter pipe 5, and meanwhile, underground water in the precipitation well is convenient to extract.
And S108, cleaning the precipitation well, and putting a water pump into the precipitation well, wherein the water pump is placed 1.0-2.0m away from the bottom of the precipitation well, so that long-period precipitation can be carried out according to a designed precipitation scheme.
Specifically, when the down-the-hole hammer drill 1 drills, the down-the-hole hammer drill 1 drives a drill rod to rotate, compressed air enters the down-the-hole hammer through the drill rod to generate impact force with certain frequency, rocks are crushed by means of the impact force, meanwhile, a drill bit is cooled by waste gas discharged from a slag discharge hole 7 at the bottom of the down-the-hole hammer drill 1, and the rock chips which are chiseled are discharged out of a dewatering well. Broken gravels of the drill bit enter the interior through a slag discharge port at the bottom of the drill bit and are discharged along a gap between the bridge type strainer 5 and the down-the-hole hammer drill 1, and meanwhile, the metal teeth 6 at the bottom of the drill bit can accelerate the drilling efficiency.
The foregoing are merely examples of the present invention and common general knowledge of known specific structures and/or features of the schemes has not been described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.
Claims (5)
1. A construction method for long-period precipitation of a hard soil layer is characterized by comprising the following steps: the method comprises the following steps:
s102, measuring and setting out according to the coordinates and the dewatering well plane arrangement diagram, determining a dewatering well central line, and marking the position of the dewatering well according to the central line;
s104, leveling a construction area field, and installing a down-the-hole hammer drill to a preset position; the down-the-hole hammer drill is connected with a pilot device, and a drill bit of the down-the-hole hammer drill is also covered with a casing shoe and a bridge type water filter pipe connected with the casing shoe; the inner diameters of the casing shoe and the bridge type strainer are larger than the outer diameter of the drilling tool;
s106, after the down-the-hole hammer drill drills into a preset stratum, the drilling tool is converged to be taken out of the bridge type water filtering pipe, and the drilling tool is withdrawn out of the hole, so that the bridge type water filtering pipe can be left in the precipitation well;
and S108, cleaning the precipitation well, and putting the water pump into the precipitation well, so that long-period precipitation can be carried out according to the designed precipitation scheme.
2. A method of construction for long periods of precipitation in hard soil according to claim 2, characterised in that: the down-the-hole hammer drill is a pneumatic down-the-hole hammer drill.
3. A method of construction for long periods of precipitation in hard soil according to any one of claims 1 to 3, characterised in that: and S104, when the drilling machine is installed and aligned, the longitudinal and transverse errors of the hole positions are not more than +/-50 mm.
4. A method of construction of a hard soil layer for long periods of precipitation as claimed in claim 4, wherein: and the method also comprises the step S105 that the down-the-hole hammer drill needs to clean and discharge the slag once when drilling for 0.3m-0.5 m.
5. A method of construction of a hard soil layer for long periods of precipitation as claimed in claim 4, wherein: and the water pump in the step S108 is placed 1.0-2.0m away from the bottom of the precipitation well.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110625433.6A CN113445901A (en) | 2021-06-04 | 2021-06-04 | Construction method for long-period precipitation of hard soil layer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110625433.6A CN113445901A (en) | 2021-06-04 | 2021-06-04 | Construction method for long-period precipitation of hard soil layer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113445901A true CN113445901A (en) | 2021-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110625433.6A Pending CN113445901A (en) | 2021-06-04 | 2021-06-04 | Construction method for long-period precipitation of hard soil layer |
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| Country | Link |
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| CN (1) | CN113445901A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2663639Y (en) * | 2003-12-05 | 2004-12-15 | 中国地质科学院探矿工艺研究所 | Eccentric following drill for down-the-hole hammer |
| CN200940443Y (en) * | 2006-08-04 | 2007-08-29 | 中国地质科学院探矿工艺研究所 | Down-the-hole pipe-following drilling system |
| US20120012399A1 (en) * | 2009-01-14 | 2012-01-19 | Wassara Ab | Drill bit for a down-the-hole drill |
| CN109930993A (en) * | 2019-04-22 | 2019-06-25 | 北京城建勘测设计研究院有限责任公司 | A kind of pebble layer tube well dewatering well formation device and construction method |
| CN110206481A (en) * | 2019-04-24 | 2019-09-06 | 武汉一冶建筑安装工程有限责任公司 | Dewatering well constructing device |
-
2021
- 2021-06-04 CN CN202110625433.6A patent/CN113445901A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2663639Y (en) * | 2003-12-05 | 2004-12-15 | 中国地质科学院探矿工艺研究所 | Eccentric following drill for down-the-hole hammer |
| CN200940443Y (en) * | 2006-08-04 | 2007-08-29 | 中国地质科学院探矿工艺研究所 | Down-the-hole pipe-following drilling system |
| US20120012399A1 (en) * | 2009-01-14 | 2012-01-19 | Wassara Ab | Drill bit for a down-the-hole drill |
| CN109930993A (en) * | 2019-04-22 | 2019-06-25 | 北京城建勘测设计研究院有限责任公司 | A kind of pebble layer tube well dewatering well formation device and construction method |
| CN110206481A (en) * | 2019-04-24 | 2019-09-06 | 武汉一冶建筑安装工程有限责任公司 | Dewatering well constructing device |
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Application publication date: 20210928 |
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