CN112096343A - Borehole closure device, and gravity drainage device and method for a dive borehole - Google Patents
Borehole closure device, and gravity drainage device and method for a dive borehole Download PDFInfo
- Publication number
- CN112096343A CN112096343A CN202010882257.XA CN202010882257A CN112096343A CN 112096343 A CN112096343 A CN 112096343A CN 202010882257 A CN202010882257 A CN 202010882257A CN 112096343 A CN112096343 A CN 112096343A
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- China
- Prior art keywords
- grout
- borehole
- stopping body
- accommodating cavity
- hole
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Classifications
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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
- E21B33/00—Sealing or packing boreholes or wells
- E21B33/10—Sealing or packing boreholes or wells in the borehole
- E21B33/13—Methods or devices for cementing, for plugging holes, crevices, or the like
-
- 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
- E02D17/20—Securing of slopes or inclines
-
- 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
Abstract
A borehole closure device, and a gravity drainage device and method for a dive borehole, the borehole closure device comprising: the slurry stopping body (2) is a flexible container with a closed accommodating cavity; the grouting pipe (3), one end of the grouting pipe (3) penetrates through the side wall of the grout stopping body (2) and extends into the depth of the closed accommodating cavity inside the grout stopping body (2); the grout outlet pipe (4) and the grouting pipe (3) are arranged in parallel, and one end of the grout outlet pipe (4) also penetrates through the side wall of the grout stopping body (2) and extends into a closed accommodating cavity in the grout stopping body (2); and the depth of the grout outlet pipe (4) entering the closed accommodating cavity is less than that of the grouting pipe (3) entering the closed accommodating cavity. The grouting pipe injects cement slurry into the grout stopping body, so that the grout stopping body expands and deforms to be in close contact with the side wall of the drilled hole, and the drilled hole can be sealed to drain water automatically.
Description
Technical Field
The invention relates to the field of acceleration of underground water disaster prevention treatment, in particular to a drilling hole sealing device, a downward-inclined drilling hole self-flowing drainage device and a method.
Background
In the environments of slopes, tunnels and the like, a large amount of landslide is induced by the rise of the underground water level in the slope body caused by infiltration of rainfall. The rise of the underground water level in the slope body is an accumulation process of rainfall infiltration, and continuous effective drainage measures are adopted to drain the underground water entering the infiltration slope body in real time, so that the occurrence of a large number of landslide disasters can be reduced.
In order to drain groundwater, in a slope environment, conventional drainage measures include surface drainage ditches and drainage blind ditches, sump wells for pumping water, horizontal drainage holes, subsurface drainage holes, and the like. The drainage effectiveness of the surface drainage measures such as surface drainage ditches, drainage blind ditches and the like is difficult to ensure; the water collection well needs power and frequent management for water pumping, the energy consumption is high, and the use cost is high; the horizontal drain hole is easy to block in the natural drainage process due to small inclination angle, so that the long-term effectiveness of drainage measures is influenced; the underground drainage hole has long construction period, complex process and high cost.
In long-term landslide hazard control studies, the applicant team discovered and proposed a siphon drainage method for downward-inclined drilling and applied it to the underground water drainage of downward-inclined drilling of slopes, tunnels and the like (see a series of patent applications CN201110147021.2, CN201410470099.1, CN201610307632.1, CN201710522908.2 and CN201810427412.1 earlier proposed by the applicant). However, the problem that the siphon drainage needs manual intervention for starting the siphon drainage, the diameter of the drainage pipe needs to be small enough not to generate a wall flow, and the water outlet of the siphon pipe needs to be lower than the underground water level in the hole limits the efficient use of the siphon drainage, so that the applicant team carries out further intensive research on the problem and provides a self-flowing drainage method of the dip drilling.
In the construction technology of the top-down type drilling self-flowing drainage, the very important part is to seal the orifice section of the drainage hole by grouting, and the slurry is prevented from flowing into the bottom section of the drilled hole in the grouting sealing process of the orifice section. The drain hole becomes a waste hole because if the slurry flows into the bottom section of the borehole, occupying a cavity that is pressurized by groundwater, so that groundwater cannot flow into the drainage cavity of the bottom section.
At present, the grout stopping technology for drilling holes in rock and soil mainly comprises two types of grout stopping plugs and grout stopping capsules. The grout stopping plug mainly comprises a mechanical type grout stopping plug and a hydraulic expansion type grout stopping plug, and the grout stopping plug has the working principle that the grout stopping plug is arranged in a drill hole to expand and is tightly attached to the wall of the drill hole, so that grout is prevented from flowing along the drill hole during grouting. The grout stop plug is suitable for stable surrounding rock of the hole wall, no longitudinal non-plugging cracks and hole sections with regular hole diameters, but is not suitable for grout stop of irregular drilling holes of broken rock bodies, gravel soil and the like. The grout stopping capsule mainly adopts an inflatable bag to expand to achieve the purpose of sealing and drilling holes to stop grout, special inflating equipment needs to be configured, air is inflated in advance before grouting and pre-grouting inspection is needed, and air is timely supplied during grouting to prevent grout leakage. When the grout stopping capsule is implemented on site, the grout leakage condition often occurs because the air bag is easy to damage.
However, the dump drilling self-flowing drainage method is mainly applied to a gravel soil slope or a broken rock slope, a drill hole usually has an irregular shape, and even a local hole collapse phenomenon occurs in the drill hole, so that the existing grout stopping technology cannot adapt to the grout stopping requirement of grouting sealing of the orifice section of the dump drilling self-flowing drainage hole.
Disclosure of Invention
The invention aims to provide a drilling hole sealing device, a self-flowing drainage device for a downward-inclined drilling hole and a method.
The present invention provides a borehole closure device, wherein the device comprises: the slurry stopping body is a flexible container with a closed accommodating cavity; one end of the grouting pipe penetrates through the side wall of the grout stopping body and extends into the depth of the closed accommodating cavity inside the grout stopping body; the grout outlet pipe and the grouting pipe are arranged in parallel, and one end of the grout outlet pipe penetrates through the side wall of the grout stopping body and extends into the closed accommodating cavity in the grout stopping body; and the depth of the grout outlet pipe entering the closed accommodating cavity is less than that of the grouting pipe entering the closed accommodating cavity.
So, through the slip casting pipe with cement thick liquid pour into only the thick liquid body for only thick liquid body expansion deformation and the lateral wall in close contact with of drilling can realize the closure to drilling.
In one embodiment, the borehole closure device further comprises: a support unit for securing the borehole closure device within a borehole.
In one embodiment, the supporting unit includes: the supporting rod and a structure fixed in the hole at the end part of the supporting rod.
In one embodiment, the grout stop is disposed adjacent the hole securing structure and toward the middle of the support rod.
The invention also provides a gravity drainage device for a dip drill hole, comprising the drill hole closing device of any one of the preceding claims, wherein:
the working unit is used for draining water and extends to penetrate through the grout stopping body, so that the water inlet of the working unit is closer to the bottom of the drill hole than the grout stopping body.
The invention also provides a self-flowing drainage method for the downward-inclined drilling, which comprises the following steps: placing the self-flowing drainage device at a preset position in a downward-inclined drilling hole; injecting cement slurry into the grout stopping body, so that the grout stopping body expands and deforms to close the drilled hole; and extending the water outlet of the working unit to the slope position of the drilling hole through the closed guide pipe.
Drawings
Fig. 1 is a schematic view of the self-draining device of the present invention.
In the figure: the grouting device comprises a drilling hole 1, a grout stopping body 2, a grouting pipe 3, a grout outlet pipe 4, a supporting rod 5, a drainage working unit 6, a fixing device 7, a structure 8 fixed in the hole, a slope 9 and a grouting pump 10.
Detailed Description
In order to make the technical problems, technical solutions and advantages of the present invention more apparent, the following detailed description is given with reference to the accompanying drawings and specific embodiments. In the following description, characteristic details such as specific configurations and components are provided only to help the embodiments of the present invention be fully understood. Thus, it will be apparent to those skilled in the art that various changes and modifications may be made to the embodiments described herein without departing from the scope and spirit of the invention. In addition, descriptions of well-known functions and constructions are omitted for clarity and conciseness.
It should be appreciated that reference throughout this specification to "one embodiment" or "an embodiment" means that a particular feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present invention. Thus, the appearances of the phrases "in one embodiment" or "in an embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
In various embodiments of the present invention, it should be understood that the sequence numbers of the following processes do not mean the execution sequence, and the execution sequence of each process should be determined by its function and inherent logic, and should not constitute any limitation to the implementation process of the embodiments of the present invention.
It should be understood that the term "and/or" herein is merely one type of association relationship that describes an associated object, meaning that three relationships may exist, e.g., a and/or B may mean: a exists alone, A and B exist simultaneously, and B exists alone. In addition, the character "/" herein generally indicates that the former and latter related objects are in an "or" relationship.
In the embodiments provided herein, it should be understood that "B corresponding to a" means that B is associated with a from which B can be determined. It should also be understood that determining B from a does not mean determining B from a alone, but may be determined from a and/or other information.
The term "dive-down borehole" as used in the present invention generally refers to a borehole that is at a positive angle with respect to the horizontal (a borehole that extends downward inside a slope or tunnel), i.e. the relative height of the exit of the borehole is higher than the relative height of the bottom of the borehole, so that the borehole as a whole assumes a dive-down extended configuration when viewed in position at the exit of the borehole.
The method utilizes the characteristic that a slope underground water line (in the invention, slope terrain is taken as an example for explanation, but it is understood that other rock and soil body structures with similar terrain environments are all suitable) and a slope surface line have the same change trend, and the aim of automatically draining water is achieved by sealing the hole opening section of the drilled hole to enable the hole bottom section to generate water pressure higher than the hole opening.
As shown in fig. 1, the slope of rock-soil mass generally has a slope surface 9 extending substantially obliquely, and a ground water level substantially matching the extending shape of the slope surface 9 is provided below the slope surface 9.
Fig. 1 schematically shows a side view of a dive borehole 1. The top-down inclined drill hole 1 extends from the slope surface 9 of the side slope formed by rock-soil mass to the inside of the side slope, and the extending depth of the top-down inclined drill hole 1 is deep below the underground water level, so that the underground water in the side slope can be drained out of the side slope through the self-flowing drainage method.
As described above, in the gravity drainage method of the dive drill 1, the setting of the grout 2 is an important part. The invention provides a drilling hole sealing device with an innovative structure for the first time, which can meet the grout stopping requirement of the segmental grouting of a drilling hole with irregular shape on the wall of a slope hole with a complex structure.
Borehole closure device
The drilling hole sealing device provided by the invention can comprise a grout stopping body 2, a grouting pipe 3 and a grout outlet pipe 4.
Wherein the grout stopper 2 is selected to be a flexible container having a closed receiving cavity. Due to its flexible nature, its shape may be chosen to have a shape that is individually adapted to fill the borehole 1, typically a tubular shape that is adapted to the borehole shape.
Further, a material that can be typically used as the slurry 2 is selected from woven geotextile or chemical fiber cloth with a considerable strength, and the material is suitable for processing (such as sewing) into a tubular/cylindrical container with a closed accommodating cavity. In view of the practical requirements of grouting closed drilling, the woven geotextile should have the same phaseWhen the strength and the sealing performance are high, 300g/m is adopted2The woven geotextile with the above specification is a preferable scheme.
One end of the grouting pipe 3 penetrates through the side wall of the grout 2 and extends into the deep part of the closed accommodating cavity inside the grout 2, and the other end of the grouting pipe 3 should have a considerable length in view of closed drilling construction so as to extend out of the drilling outlet so as to communicate with the grouting pump 10.
The outlet pipe 4 is arranged in parallel with the grouting pipe 3, and one end of the outlet pipe also needs to penetrate through the side wall of the grouting body 2 and extend into a closed accommodating cavity inside the grouting body 2, but the depth of the outlet pipe entering the closed accommodating cavity can be greatly less than that of the grouting pipe 3. Therefore, in the process of closing the drill hole 1, after cement slurry enters the closed accommodating cavity of the grout stopping body 2 through the grouting pipe 3, the cement slurry can enter the grouting pipe 4 after the grout stopping body 2 is expanded and deformed through accumulation to a certain degree. Similarly, the other end of the grout outlet pipe 4 needs to extend beyond the outlet of the drilled hole to observe whether the cement grout fills the closed accommodating cavity inside the grout 2.
The borehole closure device may further comprise a support unit to hold the borehole closure device in place and deep inside the borehole 1, as required to facilitate the fixation of the borehole closure device inside the borehole.
The support unit may typically comprise a support bar 5 and an in-hole fixation structure 8. Wherein the support bar 5 may have a suitable extension length, the grout stopper 2 is fixed in place on the support bar 5 by fixing means such as lashing means 7. The end of the support rod 5 is provided with an in-hole anchoring structure 8 of a predetermined length (the radial dimension of which should be smaller than the inner radial dimension of the borehole), and the grout stopper 2 may be positioned generally adjacent to the in-hole anchoring structure 8 and towards the middle of the support rod 5. In this way it is ensured that after the bore hole closing means has completed the bore hole closing, the bore hole interior forms a closed space containing groundwater in the vicinity of the in-hole fixed structure 8.
The support rod 5 may pass through the grout stopper 2, or the grout stopper 2 may be disposed around the support rod 5.
Self-flowing drainage device for downward-inclined drilling
The gravity drainage device is based on a drilling hole closing device and further comprises a working unit 6 for draining water. The work unit 6 of the drainage including drain pipe and level sensor cable etc. extends and passes only the thick liquid 2, gets into the bottom section of the drilling of bowing, and wherein the lower part is permeated water the pipe and can be combined with downthehole fixed structure 8, for example downthehole fixed structure 8 adopts the body of permeating water of filtering the material, and the water inlet setting of work unit 6 is inside downthehole fixed structure 8, and the delivery port of work unit 6 extends the setting outside domatic 9 through confined honeycomb duct.
Self-flowing drainage method for downward-inclined drilling
The gravity drainage device is placed in a preset position in the drill hole 1, the grouting pipe 3 is communicated with the grouting pump 10, and grouting is started.
The cement thick liquid constantly flows into the grout stopping body 2 through the grouting pipe 3 and is filled with the whole closed accommodating cavity, the pressure of the cement thick liquid in the closed accommodating cavity is gradually increased, the flexible grout stopping body 2 expands and deforms under the action of the pressure of the thick liquid, the outer surface of the grout stopping body 2 is made to be attached to the wall of the drilled hole, the further injected redundant cement thick liquid flows out through the grout outlet pipe 4, grouting is stopped after the grout flowing out from the grout outlet pipe 4 reaches the hole opening, and the grout stopping plugging section of the drilled hole 1 is formed after the cement thick liquid in the grout stopping body 2 is solidified.
Inside the drilling 1, a water storage space isolated from the outside atmosphere is formed in the cavity near the hole fixing structure 8, and along with the infiltration of underground water, the pressure in the water storage space is increased to start the self-flowing drainage.
The working principle of the gravity drainage is described in detail in other related case applications of the inventor team, and is not described in detail herein.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the invention has been described in detail with reference to the foregoing illustrative embodiments, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. A borehole closure device, the device comprising:
the slurry stopping body (2) is a flexible container with a closed accommodating cavity;
the grouting pipe (3), one end of the grouting pipe (3) penetrates through the side wall of the grout stopping body (2) and extends into the depth of the closed accommodating cavity inside the grout stopping body (2); and
the grout outlet pipe (4), the grout outlet pipe (4) and the grouting pipe (3) are arranged in parallel, and one end of the grout outlet pipe (4) also penetrates through the side wall of the grout stopping body (2) and extends into a closed accommodating cavity in the grout stopping body (2);
and the depth of the grout outlet pipe (4) entering the closed accommodating cavity is less than that of the grouting pipe (3) entering the closed accommodating cavity.
2. The borehole closure device according to claim 1, further comprising: a support unit for fixing the borehole closure device within a borehole (1).
3. The borehole closure device according to claim 2, wherein the support unit comprises: the support rod (5) and a hole fixed structure (8) fixed at the end part of the support rod (5).
4. A borehole closure device according to claim 3, characterized in that the grout stop (2) is arranged adjacent to the hole anchoring structure (8) and towards the middle of the support rod (5).
5. A gravity drainage apparatus for a dip bore hole, comprising a bore hole closure apparatus according to any one of claims 1 to 4, wherein:
comprises a working unit (6) for draining water, the working unit (6) extends through the grout stopper (2) so that the water inlet of the working unit (6) is closer to the bottom of the drill hole (1) than the grout stopper (2).
6. A method of self-draining a dump borehole, comprising:
placing the gravity drainage device of claim 5 in a pre-set position in a dump borehole (1);
injecting cement slurry into the grout stopping body (2) so that the grout stopping body (2) expands and deforms to close the drill hole (1);
and the water outlet of the working unit (6) extends to a position lower than the bottom of the drill hole (1) through the closed guide pipe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010882257.XA CN112096343A (en) | 2020-08-28 | 2020-08-28 | Borehole closure device, and gravity drainage device and method for a dive borehole |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010882257.XA CN112096343A (en) | 2020-08-28 | 2020-08-28 | Borehole closure device, and gravity drainage device and method for a dive borehole |
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| Publication Number | Publication Date |
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| CN112096343A true CN112096343A (en) | 2020-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010882257.XA Pending CN112096343A (en) | 2020-08-28 | 2020-08-28 | Borehole closure device, and gravity drainage device and method for a dive borehole |
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| CN (1) | CN112096343A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113445959A (en) * | 2021-08-10 | 2021-09-28 | 中铁二院工程集团有限责任公司 | Drilling drainage structure of karst or fault tunnel and construction method and construction structure thereof |
| CN115233749A (en) * | 2022-07-29 | 2022-10-25 | 中国铁路上海局集团有限公司杭州铁路枢纽工程建设指挥部 | Red bed soft rock slope grouting and drainage anchoring test device and method thereof |
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| JP2011231457A (en) * | 2010-04-23 | 2011-11-17 | Nobuo Nakayama | Water barrier method for water collecting borehole and water barrier device for the method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113445959A (en) * | 2021-08-10 | 2021-09-28 | 中铁二院工程集团有限责任公司 | Drilling drainage structure of karst or fault tunnel and construction method and construction structure thereof |
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| CN115233749A (en) * | 2022-07-29 | 2022-10-25 | 中国铁路上海局集团有限公司杭州铁路枢纽工程建设指挥部 | Red bed soft rock slope grouting and drainage anchoring test device and method thereof |
| CN115233749B (en) * | 2022-07-29 | 2024-04-19 | 中国铁路上海局集团有限公司杭州铁路枢纽工程建设指挥部 | Red bed soft rock side slope grouting drainage anchoring test device and method thereof |
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Application publication date: 20201218 |