CN113216149B - Grouting process for advanced drilling - Google Patents
Grouting process for advanced drilling Download PDFInfo
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- CN113216149B CN113216149B CN202110556606.3A CN202110556606A CN113216149B CN 113216149 B CN113216149 B CN 113216149B CN 202110556606 A CN202110556606 A CN 202110556606A CN 113216149 B CN113216149 B CN 113216149B
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- hole
- pipe body
- slurry
- grouted
- grouting
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- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000005553 drilling Methods 0.000 title claims abstract description 18
- 239000002002 slurry Substances 0.000 claims abstract description 65
- 239000011440 grout Substances 0.000 claims abstract description 31
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 238000007789 sealing Methods 0.000 claims description 8
- 238000007569 slipcasting Methods 0.000 abstract description 15
- 230000000694 effects Effects 0.000 abstract description 8
- 238000010276 construction Methods 0.000 abstract description 5
- 239000007788 liquid Substances 0.000 abstract description 5
- 238000005516 engineering process Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000009792 diffusion process Methods 0.000 description 3
- 238000011835 investigation Methods 0.000 description 3
- 239000011435 rock Substances 0.000 description 3
- 239000002699 waste material Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- 230000003631 expected effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
Images
Classifications
-
- 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
- E02D3/12—Consolidating by placing solidifying or pore-filling substances in the soil
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- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Agronomy & Crop Science (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
Abstract
The invention relates to a construction process, and particularly discloses a grouting process for advanced drilling. The grouting process adopts a grouting sleeve, the grouting sleeve comprises a pipe body, and a grouting channel is axially arranged in the pipe body; at least one group of slurry outlet holes are formed in the pipe wall of the pipe body and communicated with the slurry injection channel. The grouting is to plug the slurry outlet end of the pipe body; inserting the grout outlet end of the pipe body inwards into the hole to be grouted to ensure that the grout outlet hole enters the hole to be grouted; pressurizing and introducing pre-tightening slurry from the slurry inlet end of the pipe body, wherein the pre-tightening slurry flows out from the slurry outlet hole and enters a gap between the pipe body and the wall of the hole to be grouted; standing until the pre-tightening slurry is solidified; drilling through the grout outlet end of the pipe body, pressurizing and introducing filling grout from the grout inlet end of the pipe body, and performing grouting filling on the area to be grouted. Above slip casting technology can effectually avoid the thick liquid to flow backward from the drill way, guarantee grouting pressure, improve slip casting efficiency and slip casting effect.
Description
Technical Field
The invention relates to a construction process, in particular to a grouting process for advanced drilling.
Background
In engineering construction, the advance drilling mode is often needed to be adopted to carry out investigation on soil or rock strata, after the investigation is finished, the advance drilling hole is used for grouting according to needs, and slurry can be diffused in the rock strata to reinforce the rock strata. In the existing grouting process, a grouting channel is usually arranged in a drill rod and a drill bit, and after the investigation is finished, grout is injected into a hole through the grouting channel.
However, because the diameter of the drill bit is generally larger than that of the drill rod, during grouting, slurry injected into the hole returns out of the hole opening from an annular gap between the hole wall and the drill rod, so that the establishment of grouting pressure is influenced, the grouting diffusion range and the grouting amount are seriously influenced, the grouting reinforcement cannot achieve the expected effect, the use efficiency of the slurry is reduced, and the construction environment is polluted.
Disclosure of Invention
The invention aims to provide a grouting process for advanced drilling, which can effectively prevent grout from flowing backwards from an orifice, ensure grouting pressure and improve grouting efficiency and grouting effect.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a grouting process for advanced drilling adopts a grouting sleeve, the grouting sleeve comprises a pipe body, and a grouting channel is axially arranged in the pipe body; the pipe wall of the pipe body is provided with at least one group of slurry outlet holes, and the slurry outlet holes are communicated with the slurry injection channel;
at least comprises the following steps:
step one, plugging a slurry outlet end of a pipe body;
inserting the grout outlet end of the pipe body inwards into the hole to be grouted to ensure that the grout outlet hole enters the hole to be grouted;
thirdly, pressurizing and introducing pre-tightening slurry from the slurry inlet end of the pipe body, wherein the pre-tightening slurry flows out of the slurry outlet hole and enters a gap between the pipe body and the wall of the hole to be grouted;
step four, standing until the pre-tightening slurry is solidified;
fifthly, the plugging of the grout outlet end of the pipe body is damaged, so that the grouting channel is communicated with the hole to be grouted; and pressurizing and introducing filling slurry from the slurry inlet end of the pipe body, and performing grouting filling on the area to be grouted.
Before the slip casting is filled, insert the slip casting sleeve pipe and treat the slip casting hole to fix through pretension thick liquid and seal, can guarantee that slip casting filling in-process thick liquid can't flow backward from the drill way, improve slip casting pressure, fully fill and treat the slip casting region. The waste of slurry can be reduced, and the grouting efficiency and the grouting effect are improved.
Preferably, the filling slurry has a fluidity that is superior to the fluidity of the pre-tensioning slurry.
And (3) aiming at the pre-tightening slurry grouting process in the step three, the flowing speed of the slurry is required to be low, and the phenomenon that the slurry flows from the orifice partially due to too fast flowing is avoided, so that the pre-tightening slurry is made of a material with poor flowability. In the grouting process in the step five, the sufficient diffusion of the slurry needs to be considered, and the filling effect is ensured, so that a material with better fluidity needs to be selected.
Preferably, the slurry inlet end of the pipe body is provided with a connecting piece, the connecting piece can be a flange and is used for being connected with a pressurizing device for conveying slurry, and the connecting piece is reliable in connection and ensures the sealing property.
Preferably, at least one group of supporting protrusions are further arranged on the outer side of the pipe body. After the pre-tightening slurry is solidified, the supporting protrusion is embedded into the pre-tightening slurry, and the pre-tightening effect between the pipe body and the hole to be grouted is good.
Preferably, the supporting protrusion is elongated and extends in the axial direction of the tube body.
Preferably, before the second step, drilling a pre-tightened hole with a preset depth at the hole opening of the hole to be grouted, wherein the diameter of the pre-tightened hole is larger than that of the hole to be grouted; the outer diameter of the pipe body is larger than the diameter of the hole to be grouted and smaller than the diameter of the pre-tightening hole.
The pre-tightening hole can play a role in axially positioning the component sleeve.
Preferably, the depth of the pre-tightened hole is 1 to 5m.
Preferably, the pre-tightening hole and the hole to be grouted are coaxially arranged, and the radius of the pre-tightening hole is 20 to 40mm larger than that of the hole to be grouted.
Preferably, the inner diameter of the pipe body is larger than the diameter of the hole to be grouted.
The grout outlet end of the pipe body is completely covered by the end face of the pre-tightening hole, so that the axial load borne by the grout outlet end of the pipe body can be reduced in the grouting process of a to-be-grouted area, and the connection reliability between the grouting sleeve and the to-be-grouted hole is improved.
Preferably, in the first step, the slurry outlet end of the pipe body is sealed by a sealing head, and the sealing head is arranged separately from or integrally with the pipe body.
The end enclosure can be a plate or even a wood plate which is arranged separately from the pipe body; or a sealing plate which is integrally formed or welded with the pipe body; or a plug partially inserted into the grouting channel and matched with the grouting channel. The form of head can be various, can use tools such as drill bit to destroy the shutoff of head in step five.
Drawings
FIG. 1 is a schematic structural diagram of a grouting casing used in the grouting process for advanced drilling according to the embodiment;
FIG. 2 is a schematic view of a hole to be grouted during construction;
FIG. 3 is a schematic structural diagram of a pre-tightened hole formed in the grouting process for advance drilling according to the embodiment;
FIG. 4 is a schematic view of a grouting sleeve inserted into a hole to be grouted in the grouting process for advanced drilling according to the embodiment;
FIG. 5 is an enlarged view of a portion of FIG. 4 at A;
FIG. 6 is a schematic structural diagram illustrating a state of a damaged seal head in the grouting process for advanced drilling according to the embodiment;
fig. 7 is a partial enlarged view of fig. 6 at B.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Examples
As shown in fig. 1-7, a grouting process for advanced drilling adopts a grouting sleeve, as shown in fig. 1 and 4, the grouting sleeve comprises a pipe body 3, one end of the pipe body 3 is a grout outlet end 6, the other end of the pipe body is a grout inlet end 1, and a grouting channel 7 is axially arranged in the pipe body 3. The pipe wall of the pipe body 3 is provided with at least one group of slurry outlet holes 4, and the slurry outlet holes 4 are communicated with a slurry injection channel 7.
At least comprises the following steps:
taking out the drill bit and the drill rod in the hole 10 to be grouted, and plugging the grout outlet end 6 of the pipe body 3;
step two, as shown in fig. 4 and 5, inserting the grout outlet end 6 of the pipe body 3 inwards into the hole to be grouted 10, wherein the insertion depth is based on the preset depth of the grout outlet 4 entering the hole to be grouted 10;
thirdly, pressurizing and introducing pre-tightening slurry 12 from the slurry inlet end 1 of the pipe body 3, wherein the pre-tightening slurry 12 flows out from the slurry outlet hole 4 and enters a gap between the pipe body 3 and the wall of the hole to be grouted 10;
step four, standing until the pre-tightening slurry 12 is solidified;
step five, as shown in fig. 6 and 7, the plugging of the grout outlet end 6 of the pipe body 3 is damaged, so that the grouting channel 7 is communicated with the hole to be grouted 10; filling slurry is pressurized and introduced from the slurry inlet end 1 of the pipe body 3, and grouting filling is carried out on the area to be grouted.
Before the slip casting is filled, insert slip casting sleeve pipe and treat slip casting hole 10 to fix through pretension thick liquid 12 and seal, can guarantee that slip casting filling in-process thick liquid can't flow backward from the drill way, improve slip casting pressure, fully fill and treat the slip casting region. The waste of slurry can be reduced, and the grouting efficiency and the grouting effect are improved.
The filling slurry has a fluidity superior to that of the pre-tensioned slurry 12. Aiming at the grouting process of the pre-tightening slurry 12 in the step three, the flowing speed of the slurry is required to be low, and the phenomenon that the slurry flows through a part of orifices due to too fast flowing is avoided, so that the pre-tightening slurry 12 is made of a material with poor flowability. In the grouting process in the step five, sufficient diffusion of the slurry needs to be considered, and the filling effect is ensured, so that a material with good fluidity needs to be selected.
As shown in fig. 1, a connecting piece 2 is arranged at a grout inlet end 1 of the pipe body 3, and the connecting piece 2 can be a flange and is used for being connected with a pressurizing device for delivering grout, so that the connection is reliable, and the sealing performance is also guaranteed.
As shown in fig. 1, at least one set of supporting protrusions 5 is further disposed on the outer side of the tube 3. After the pre-tightening grout 12 is solidified, the supporting protrusion 5 is embedded in the pre-tightening grout 12, and the pre-tightening effect between the pipe body 3 and the hole 10 to be grouted is good. The supporting protrusion 5 is in a shape of a long strip and extends along the axial direction of the tube 3.
As shown in fig. 3-7, before the second step, drilling a pre-tightening hole 11 with a predetermined depth at the orifice of the hole to be grouted 10, wherein the diameter of the pre-tightening hole 11 is larger than that of the hole to be grouted 10; the outer diameter of the pipe body 3 is larger than the diameter of the hole 10 to be grouted and smaller than the diameter of the pre-tightening hole 11. The pre-tightening hole 11 can play a role in axially positioning the component sleeve. The depth of the pre-tightening hole 11 is 1 to 5m. The pre-tightening hole 11 and the hole to be grouted 10 are coaxially arranged, and the radius of the pre-tightening hole 11 is 20-40mm larger than that of the hole to be grouted 10. The inner diameter of the pipe body 3 is larger than the diameter of the hole to be grouted 10.
As shown in fig. 3 to 5, the grout outlet end 6 of the pipe body 3 is completely covered by the end surface of the pre-tightening hole 11, so that in the grouting process of the area to be grouted, the axial load borne by the grout outlet end 6 of the pipe body 3 can be reduced, and the connection reliability between the grouting sleeve and the hole to be grouted 10 can be improved.
In the first step, as shown in fig. 4 and 5, the slurry outlet end 6 of the pipe body 3 is blocked by the end socket 8, and the end socket 8 is arranged separately from or integrally with the pipe body 3. The end socket 8 can be a plate or even a wood plate which is arranged separately from the pipe body 3; or a sealing plate formed integrally with or welded to the pipe body 3; or a plug partially inserted into the grouting passage 7 and engaged with the grouting passage 7. The form of the seal head 8 can be various, and tools such as a drill bit can be used for breaking the seal head 8 in the fifth step.
In conclusion, the above description is only for the preferred embodiment of the present invention and should not be construed as limiting the present invention, and any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (6)
1. A grouting process for advance drilling is characterized in that: a grouting sleeve is adopted and comprises a pipe body, and a grouting channel is axially arranged in the pipe body; the pipe wall of the pipe body is provided with at least one group of slurry outlet holes, and the slurry outlet holes are communicated with the slurry injection channel;
at least comprises the following steps:
step one, a hole to be grouted is formed, a drill bit and a drill rod in the hole to be grouted are taken out, and a grout outlet end of a pipe body is plugged; drilling a pre-tightening hole with a preset depth at the orifice of the hole to be grouted, wherein the diameter of the pre-tightening hole is larger than that of the hole to be grouted; the outer diameter of the pipe body is larger than the diameter of the hole to be grouted and smaller than the diameter of the pre-tightening hole; the inner diameter of the pipe body is larger than the diameter of the hole to be grouted;
inserting the grout outlet end of the pipe body inwards into the hole to be grouted to ensure that the grout outlet enters the hole to be grouted;
pressurizing and introducing pre-tightening slurry from the slurry inlet end of the pipe body, wherein the pre-tightening slurry flows out of the slurry outlet hole and enters a gap between the pipe body and the wall of the hole to be grouted;
step four, standing until the pre-tightening slurry is solidified;
fifthly, the plugging of the grout outlet end of the pipe body is damaged, so that the grouting channel is communicated with the hole to be grouted; filling grout is introduced from the grout inlet end of the pipe body in a pressurized manner, and grouting filling is carried out on the area to be grouted;
at least one group of supporting bulges are arranged on the outer side of the pipe body;
the supporting bulge is in a strip shape and extends along the axial direction of the tube body.
2. The grouting process according to claim 1, characterized in that: the fluidity of the filling slurry is superior to that of the pre-tightening slurry.
3. The grouting process according to claim 1, characterized in that: the grout inlet end of the pipe body is provided with a connecting piece.
4. Grouting process according to any one of claims 1-3, characterised in that: the depth of the pre-tightening hole is 1-5 m.
5. Grouting process according to any one of claims 1-3, characterised in that: the pre-tightening hole and the hole to be injected are coaxially arranged, and the radius of the pre-tightening hole is 20-40 mm larger than that of the hole to be injected.
6. Grouting process according to any of claims 1-3, characterised in that: in the first step, a sealing head is adopted to seal the slurry outlet end of the pipe body, and the sealing head and the pipe body are arranged in a split mode or in an integrated mode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110556606.3A CN113216149B (en) | 2021-05-21 | 2021-05-21 | Grouting process for advanced drilling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110556606.3A CN113216149B (en) | 2021-05-21 | 2021-05-21 | Grouting process for advanced drilling |
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| Publication Number | Publication Date |
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| CN113216149A CN113216149A (en) | 2021-08-06 |
| CN113216149B true CN113216149B (en) | 2022-11-15 |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101328811A (en) * | 2008-07-25 | 2008-12-24 | 北京市政建设集团有限责任公司 | TGRM subsection moving-on type advanced deep hole grouting construction process |
| KR20160080140A (en) * | 2014-12-29 | 2016-07-07 | 송경준 | Grouting injection apparatus with advanced backflow prevention and drilling and mixing method and using the same |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101644150B (en) * | 2009-07-30 | 2012-08-22 | 中铁二局股份有限公司 | After-loading orifice tube and installation method thereof |
| CN101768974B (en) * | 2009-12-29 | 2012-07-04 | 中铁隧道集团有限公司 | Method and device for grouting in hole and effectively stopping grout |
| CN102392661A (en) * | 2011-10-13 | 2012-03-28 | 北京中铁瑞威基础工程有限公司 | Grouting construction method for high pressure and rich water zone of tunnel and orifice pipe component |
| CN111396086A (en) * | 2020-03-25 | 2020-07-10 | 中铁二十三局集团第四工程有限公司 | Sleeve method curtain grouting construction method |
| CN111485918A (en) * | 2020-05-21 | 2020-08-04 | 淮南矿业(集团)有限责任公司 | Pre-grouting reinforcement method for cross-fault of working face and grouting device |
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2021
- 2021-05-21 CN CN202110556606.3A patent/CN113216149B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101328811A (en) * | 2008-07-25 | 2008-12-24 | 北京市政建设集团有限责任公司 | TGRM subsection moving-on type advanced deep hole grouting construction process |
| KR20160080140A (en) * | 2014-12-29 | 2016-07-07 | 송경준 | Grouting injection apparatus with advanced backflow prevention and drilling and mixing method and using the same |
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| Publication number | Publication date |
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| CN113216149A (en) | 2021-08-06 |
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Denomination of invention: A grouting process for advanced drilling Effective date of registration: 20231127 Granted publication date: 20221115 Pledgee: Industrial and Commercial Bank of China Limited Hangzhou Yuhang sub branch Pledgor: ZHEJIANG MOBILE HYDRAULIC POWER TECHNOLOGY CO.,LTD. Registration number: Y2023980067682 |