CN113202325A - Deep hole epoxy resin chemical grouting construction method - Google Patents
Deep hole epoxy resin chemical grouting construction method Download PDFInfo
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- CN113202325A CN113202325A CN202110457421.7A CN202110457421A CN113202325A CN 113202325 A CN113202325 A CN 113202325A CN 202110457421 A CN202110457421 A CN 202110457421A CN 113202325 A CN113202325 A CN 113202325A
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- grouting
- epoxy resin
- construction method
- deep hole
- pressure
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- 238000010276 construction Methods 0.000 title claims abstract description 35
- 239000000126 substance Substances 0.000 title claims abstract description 32
- 239000003822 epoxy resin Substances 0.000 title claims abstract description 27
- 229920000647 polyepoxide Polymers 0.000 title claims abstract description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000013461 design Methods 0.000 claims abstract description 11
- 239000007788 liquid Substances 0.000 claims abstract description 11
- 238000005553 drilling Methods 0.000 claims abstract description 8
- 238000007664 blowing Methods 0.000 claims abstract description 7
- 238000002347 injection Methods 0.000 claims abstract description 4
- 239000007924 injection Substances 0.000 claims abstract description 4
- 239000003595 mist Substances 0.000 claims abstract description 4
- 239000000463 material Substances 0.000 claims description 7
- 238000000034 method Methods 0.000 claims description 6
- 239000002002 slurry Substances 0.000 claims description 5
- 238000012360 testing method Methods 0.000 claims description 5
- 239000004593 Epoxy Substances 0.000 claims description 3
- 238000011160 research Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000004567 concrete Substances 0.000 description 10
- 239000004568 cement Substances 0.000 description 7
- 230000003014 reinforcing effect Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 4
- 230000002265 prevention Effects 0.000 description 4
- 230000002787 reinforcement Effects 0.000 description 4
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 3
- 238000007596 consolidation process Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000007689 inspection Methods 0.000 description 3
- 230000035699 permeability Effects 0.000 description 3
- NIFIFKQPDTWWGU-UHFFFAOYSA-N pyrite Chemical compound [Fe+2].[S-][S-] NIFIFKQPDTWWGU-UHFFFAOYSA-N 0.000 description 3
- 229910052683 pyrite Inorganic materials 0.000 description 3
- 239000011028 pyrite Substances 0.000 description 3
- 239000004575 stone Substances 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 239000002253 acid Substances 0.000 description 1
- 230000002421 anti-septic effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 239000011440 grout Substances 0.000 description 1
- 239000012263 liquid product Substances 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
- E04G23/00—Working measures on existing buildings
- E04G23/02—Repairing, e.g. filling cracks; Restoring; Altering; Enlarging
- E04G23/0203—Arrangements for filling cracks or cavities in building constructions
Landscapes
- Engineering & Computer Science (AREA)
- Architecture (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Working Measures On Existing Buildindgs (AREA)
Abstract
The invention provides a deep hole epoxy resin chemical grouting construction method, which sequentially comprises the following steps; (1) drilling to a target depth at one time, blowing accumulated water by pressure air until no water mist is generated, and continuing for 5-15 min; (2) preparing epoxy resin grouting liquid, and then performing segmented pure-pressure grouting from bottom to top, wherein the injection rate of the grouting section under the maximum design pressure is not more than 0.02 L.min‑1·m‑1And then continuously pouring for 20-40min or reaching the gelling time, and stopping grouting. The construction can be completed by using the traditional drilling grouting equipment without other special equipment, and the problems of difficult construction of medium-length hole chemical grouting, high construction cost and the like in the prior art are effectively solved.
Description
Technical Field
The invention belongs to the technical field of grouting construction, and particularly relates to a deep hole epoxy resin chemical grouting construction method.
Background
Chemical grouting is an engineering technology which combines chemistry and engineering, applies chemical science and chemical grout materials to solve defects of foundations and concrete (reinforcement, seepage prevention and leakage stoppage), and ensures smooth progress of engineering or improves engineering quality. With the development and progress of chemical grouting technology, the technology has become an advanced technology which is very distinctive and indispensable in modern engineering. The chemical grouting is applied from the application after the construction of the project to the design before the construction of the project, and is applied to projects such as dam foundation seepage prevention, consolidation reinforcement, poor foundation treatment and the like in quantity, and a series of grouting forms such as chemical curtain grouting, chemical consolidation grouting, cement chemical composite grouting and the like are formed in sequence. However, most of the chemical grouting applications at the present stage are defect treatment, seepage prevention, leakage stoppage and the like of concrete and poor stratum surface layers, the difficult problem of deep hole chemical grouting construction is not solved, some special equipment is required to be used in construction, and the construction cost is high.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a deep hole epoxy resin chemical grouting construction method, which can finish construction by using traditional drilling grouting equipment without other special equipment, and effectively solves the problems of difficult deep hole chemical grouting construction and high construction cost in the prior art.
In order to achieve the purpose, the technical scheme adopted by the invention for solving the technical problems is as follows: the deep hole epoxy resin chemical grouting construction method comprises the following steps in sequence;
(1) drilling to a target depth at one time, blowing accumulated water by pressure air until no water mist is generated, and continuing for 5-15 min;
(2) preparing epoxy resin grouting liquid, and then performing segmented pure-pressure grouting from bottom to top, wherein the injection rate of the grouting section under the maximum design pressure is not more than 0.02 L.min-1·m-1And then continuously pouring for 20-40min or reaching the gelling time, and stopping grouting.
Further, in the step (1), the pressure of the blowing hole is 0.1-0.4 MPa.
Further, in the step (2), the epoxy resin grouting liquid is prepared by the following method: NE-IV type epoxy grouting material produced by Zhengzhou scientific research design limited company of eleven Bureau of hydropower of China is adopted, the mixing proportion of A, B components is determined through field test, and the epoxy resin grouting liquid is obtained after mixing and stirring for 5-10 min.
Further, in the step (2), grouting is performed in at least three steps.
Further, in the step (2), a 3SNS slurry pump is adopted for grouting, the length of a grouting section is 4-5m, and the grouting pressure is 1-1.5 MPa.
In summary, the invention has the following advantages:
1. the construction can be completed by using the traditional drilling grouting equipment without other special equipment, the construction cost is reduced, and the problems of difficult construction of medium-length hole chemical grouting, high construction cost and the like in the prior art are effectively solved.
2. The epoxy resin grouting liquid product is a bi-component, is convenient to operate, and can be used for grouting concrete fine cracks, rock cracks, broken zones and the like to achieve the purposes of seepage prevention, reinforcement and reinforcement; the concrete grouting material has small viscosity, groutability and strong permeability, can be poured into a fine seam with the thickness of less than 0.2mm, has high bonding strength with concrete, and is generally greater than the tensile strength of a concrete body; the slurry can be normally cured under dry, humid and even water conditions, and a cured product has high compressive strength and tensile strength, good flexibility, no shrinkage and good reinforcing effect; the slurry has hydrophilicity and excellent bonding strength to a wet base surface; the operable time can be adjusted according to the situation, and the adjustment range is between 1 and 12 h.
3. By adopting the curtain grouting construction process of drilling to the designed hole depth once and blocking pure-pressure type self-descending and segmented grouting in the hole, the construction problem of epoxy resin chemical grouting with the depth of 40m is solved; the epoxy resin grouting liquid is used, the construction equipment adopts curtain or consolidation grouting equipment, other special equipment is not needed, and equipment investment is saved; provides a reference example for the chemical grouting construction with similar or larger hole depth, and has good reference utilization value.
Detailed Description
Example 1
A deep hole epoxy resin chemical grouting construction method sequentially comprises the following steps;
(1) drilling to a target depth at one time, blowing accumulated water by pressure air until no water mist is generated, and blowing the holes at the pressure of 0.2Mpa for 10 min;
(2) preparing epoxy resin grouting liquid, and then performing segmented pure-pressure grouting from bottom to top, wherein the injection rate of the grouting section under the maximum design pressure is not more than 0.02 L.min-1·m-1And then continuously pouring for 20-40min or reaching the gelling time, and stopping grouting. The epoxy resin grouting liquid is prepared by the following method: NE-IV type epoxy grouting material produced by Zhengzhou scientific research design limited company of eleven Bureau of hydropower of China is adopted, and the mixing proportion of A, B components is determined to be 4 through field tests: 1, mixing and stirring for 8min to obtain the epoxy resin grouting liquid with the operable time of 10 h. And grouting by using a 3SNS slurry pump, wherein the length of a grouting section is 5m, and the grouting pressure is 1.5 MPa.
Example 2
The Giller braker hydropower station in Xinjiang is positioned on a Harba river in Harba river county in Alterna region in Xinjiang, the dam site is positioned near a Giller braker ditch, the dam-shaped structure is a concrete panel rock-fill dam, the dam top elevation is 756.30m, the dam top width is 8.0m, the dam length is 473.5m, and the maximum dam height is 146.3 m.
The pyrite enrichment areas of the Xinjiang Gilles Brack hydropower station are respectively positioned in the ranges of 0+ 238.000-0 +298.000 of the left shore toe and 0+ 356.082-0 +447.092 of the right shore toe, the rock mass structure of the part is not compact due to the oxidation corrosion of the pyrite, the hammer is generally empty and mute, and sulfate ions of underground water (S04)2-) The content is as high as 614.78-1346.7 mg/L. The sulfate ions are subjected to chemical reaction in the contact process with the dam foundation concrete and the cement stones, and generate an acid etching effect, so that the dam foundation concrete and the cement stone structures are damaged, the strength of the dam foundation concrete and the cement stones is reduced, and hidden dangers are brought to the safety of the dam. Considering the problem of corrosion of sulfate in a pyrite enrichment zone, when the excavated foundation is subjected to antiseptic treatment, a row of chemical grouting is additionally arranged between front and rear rows of high-sulfate-resistance cement curtain grouting, and the chemical grouting also serves as the dense grouting after the cement grouting. The chemical grouting material is made of epoxy resin, the distance between single-row holes is 1m, the maximum depth is 38m, construction is carried out in three steps, and the qualified standard after grouting is that the water permeability q of a hole pressure water test is not more than 1 Lu. The total chemical grouting is finished at 4010m, the quality inspection effect after grouting is good, the expected purpose is achieved, and the design requirement is met.
Example 3
Since the reservoir starts to store water in the Golang hydropower station in 2008, the water discharge amount of the drain holes of the dam foundation of the No. 3-No. 8 dam section of the left bank is relatively large, 11-No. 4 main drain holes of the No. 6 dam section with relatively concentrated water discharge amount are generally discharged in a full pipe, and the maximum water discharge amount of a single hole exceeds 0.4L/s. In order to reduce the drainage of a dam foundation and facilitate long-term permeation and stability of the dam foundation, a design determines to perform reinforcing, leaking stoppage and grouting on a No. 6 dam section curtain of the left bank of a large dam of a Golang beach hydropower station.
The reinforcing, plugging and grouting is mainly made of epoxy resin chemical materials and assisted by superfine cement, and main and auxiliary double-row reinforcing and grouting holes are arranged in the 6# dam section, wherein the row spacing is 0.7m, and the reinforcing and plugging grouting holes are arranged in a quincunx manner. The main reinforcing grouting holes are inclined holes with the angle of 6 degrees upstream, the auxiliary reinforcing grouting holes are vertical holes, the average depth of the grouting holes is 42m, and construction is carried out in three sequences. A lifting hole with the depth of 50m is arranged at the position 1m upstream of the No. 6 dam section No. 8 drain hole to monitor the lifting of the dam body in the grouting process and ensure the construction safety. After grouting, arranging 1 inspection hole for pressurized water test inspection, wherein the water permeability after grouting is 1.76Lu, and the design requirement is met; meanwhile, by comparing the water discharge before and after grouting, the total monitored water discharge amount before grouting is 2.23L/s and the total monitored water discharge amount after grouting is 0.83L/s under the same water level condition, so that the water discharge amount is obviously reduced, the grouting effect is obvious, and the expected purpose is achieved. The problem that the water yield of the dam foundation drain hole is relatively large is solved satisfactorily, the seepage stability of the dam foundation is enhanced, and a foundation is tamped for the safe operation of the dam.
While the invention has been described in detail in connection with specific embodiments thereof, it is not intended to limit the scope of the invention. Various modifications and changes may be made by those skilled in the art without inventive step within the scope of the appended claims.
Claims (5)
1. A deep hole epoxy resin chemical grouting construction method is characterized by sequentially comprising the following steps;
(1) drilling to a target depth at one time, blowing accumulated water by pressure air until no water mist is generated, and continuing for 5-15 min;
(2) preparing epoxy resin grouting liquid, and then performing segmented pure-pressure grouting from bottom to top, wherein the injection rate of the grouting section under the maximum design pressure is not more than 0.02 L.min-1·m-1Then continuously perfusing for 20-40min or reaching the gelling time, and stopping grouting.
2. The deep hole epoxy resin chemical grouting construction method according to claim 1, wherein in the step (1), the hole blowing pressure is 0.1-0.4 MPa.
3. The deep hole epoxy resin chemical grouting construction method according to claim 1, wherein in the step (2), the epoxy resin grouting liquid is prepared by the following method: NE-IV type epoxy grouting material produced by Zhengzhou scientific research design limited company of eleven Bureau of hydropower of China is adopted, the mixing proportion of A, B components is determined through field test, and the epoxy resin grouting liquid is obtained after mixing and stirring for 5-10 min.
4. The deep hole epoxy resin chemical grouting construction method according to claim 1, wherein in the step (2), grouting is performed in at least three steps.
5. The deep hole epoxy resin chemical grouting construction method according to claim 1, wherein in the step (2), a 3SNS slurry pump is adopted for grouting, the length of a grouting section is 4-5m, and the grouting pressure is 1-1.5 MPa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110457421.7A CN113202325A (en) | 2021-04-27 | 2021-04-27 | Deep hole epoxy resin chemical grouting construction method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110457421.7A CN113202325A (en) | 2021-04-27 | 2021-04-27 | Deep hole epoxy resin chemical grouting construction method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113202325A true CN113202325A (en) | 2021-08-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110457421.7A Pending CN113202325A (en) | 2021-04-27 | 2021-04-27 | Deep hole epoxy resin chemical grouting construction method |
Country Status (1)
| Country | Link |
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| CN (1) | CN113202325A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114685124A (en) * | 2022-05-31 | 2022-07-01 | 中建六局(天津)绿色建筑科技有限公司 | Prefabricated rail top air duct assembling gap sealing filler and construction method thereof |
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| DE10154201A1 (en) * | 2001-11-07 | 2003-05-22 | Frank Otto | Underground foundation procedure mixes suspension of fiber aggregates and binder for injection into ground already worked out by cutting fluid jets. |
| CN102808427A (en) * | 2012-08-21 | 2012-12-05 | 中国水利水电第七工程局成都水电建设工程有限公司 | Composite grouting reinforcement anti-seepage treatment technology |
| CN103132528A (en) * | 2013-03-18 | 2013-06-05 | 中国水利水电第七工程局成都水电建设工程有限公司 | Chemical grouting technology |
| CN107130583A (en) * | 2016-11-11 | 2017-09-05 | 新疆北方建设集团有限公司 | Inclined hole cement grout construction method |
| US20190024460A1 (en) * | 2015-08-18 | 2019-01-24 | Shandong University | Anti-collapse jet grouting drill bit with bi-directional rib wings, grouting consolidation system and method |
-
2021
- 2021-04-27 CN CN202110457421.7A patent/CN113202325A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10154201A1 (en) * | 2001-11-07 | 2003-05-22 | Frank Otto | Underground foundation procedure mixes suspension of fiber aggregates and binder for injection into ground already worked out by cutting fluid jets. |
| CN102808427A (en) * | 2012-08-21 | 2012-12-05 | 中国水利水电第七工程局成都水电建设工程有限公司 | Composite grouting reinforcement anti-seepage treatment technology |
| CN103132528A (en) * | 2013-03-18 | 2013-06-05 | 中国水利水电第七工程局成都水电建设工程有限公司 | Chemical grouting technology |
| US20190024460A1 (en) * | 2015-08-18 | 2019-01-24 | Shandong University | Anti-collapse jet grouting drill bit with bi-directional rib wings, grouting consolidation system and method |
| CN107130583A (en) * | 2016-11-11 | 2017-09-05 | 新疆北方建设集团有限公司 | Inclined hole cement grout construction method |
Non-Patent Citations (2)
| Title |
|---|
| 严恺: "《水利辞典》", 31 October 1991, 上海辞书出版社 * |
| 王立民主编: "《水工建筑物检测与维修》", 30 June 1993 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114685124A (en) * | 2022-05-31 | 2022-07-01 | 中建六局(天津)绿色建筑科技有限公司 | Prefabricated rail top air duct assembling gap sealing filler and construction method thereof |
| CN114685124B (en) * | 2022-05-31 | 2022-09-02 | 中建六局(天津)绿色建筑科技有限公司 | Prefabricated rail top air duct assembling gap sealing filler and construction method thereof |
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Application publication date: 20210803 |
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