CN110080181B - Hydraulic tunnel grouting structure and arrangement method thereof - Google Patents
Hydraulic tunnel grouting structure and arrangement method thereof Download PDFInfo
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- CN110080181B CN110080181B CN201910464552.0A CN201910464552A CN110080181B CN 110080181 B CN110080181 B CN 110080181B CN 201910464552 A CN201910464552 A CN 201910464552A CN 110080181 B CN110080181 B CN 110080181B
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- water stop
- flat iron
- shaped flat
- stop belt
- reinforced concrete
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B9/00—Water-power plants; Layout, construction or equipment, methods of, or apparatus for, making same
- E02B9/02—Water-ways
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/20—Hydro energy
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
The invention relates to the technical field of water conservancy and hydropower engineering construction diversion, and discloses a hydraulic tunnel grout stop structure, which comprises a water stop paved on the surface of a reinforced concrete lining, and also comprises a plurality of L-shaped flat irons, wherein the water stop comprises a horizontal plane water stop and a vertical plane water stop, at least one through long flat iron is pressed above the horizontal plane water stop, the through long flat iron is fixed on the reinforced concrete lining through an expansion bolt, the horizontal part of the L-shaped flat iron is pressed on the horizontal plane water stop along the direction perpendicular to the folding line of the water stop, the horizontal part of the L-shaped flat iron is fixed on the reinforced concrete lining through the expansion bolt, the vertical plane water stop is clung to the vertical part of the L-shaped flat iron, and the vertical plane water stop is fixed on the L-shaped flat iron through a fixing bolt arranged on the vertical part of the L-shaped flat iron. The invention also discloses a method for arranging the hydraulic tunnel slurry stopping structure. The hydraulic tunnel grouting structure and the arrangement method thereof have the advantages of simple and safe structure, convenient construction, short construction period and low cost.
Description
Technical Field
The invention relates to the technical field of hydraulic and hydroelectric engineering construction diversion, in particular to a hydraulic tunnel grouting stopping structure and an arrangement method thereof.
Background
The hydraulic tunnel design specification (DL 5195-2004) stipulates that backfilling grouting should be carried out between the blocking body concrete, the reinforced concrete lining and the blocking body and surrounding rock; the consolidation, backfill grouting and joint grouting of the periphery of the plugging body are important means for ensuring the safe operation of the plugging body; the joint (touch) grouting of the two sides of the blocking body should be performed after the concrete reaches the stable temperature. In order to ensure the grouting quality of the contact surface of the plugging body, in the design of the plugging body, a slurry stopping structure is required to be arranged at the upper and lower boundaries of the plugging body, and a slurry stopping stem or a slurry stopping groove is generally adopted to ensure that the grouting of the contact surface is not leaked.
Through investigation, the arrangement of the common grout stopping stems of the hydraulic tunnel is shown as in fig. 4, the circumferential grout stopping stems are arranged between the original reinforced concrete lining and the plugging body concrete, and water stops are embedded in the grout stopping stems, so that the grout stopping stems and the original reinforced concrete lining are effectively fixed, a mortar anchor rod is adopted for fixing, and the backfill of the grout stopping stems is usually pre-contracted mortar; the water stop groove arrangement commonly used for hydraulic tunnels is shown in fig. 5: and (3) carving a water stopping groove on the surface of the original reinforced concrete lining, embedding a water stopping structure in the water stopping groove, and backfilling the water stopping groove by adopting a water stopping groove backfill 12, wherein the water stopping groove backfill 12 adopts pre-shrinking mortar. The advantages and disadvantages of the commonly used stem and trough are shown in Table 1 below:
TABLE 1 statistical table of characteristics of hydraulic tunnel slurry-stopping stems and water-stopping grooves
The table shows that the slurry stopping stem has reliable structure, the reclaimed filler is small in shrinkage and not easy to crack, the slurry stopping requirement is met, but the slurry stopping requirement is met when the slurry stopping stem is constructed, the slurry stopping stem is tamped by layering materials, and steel wire brush bristles are applied between the layers so as to strengthen interlayer combination, the construction is slow, and the construction period is long; the water stopping tank has reliable structure and good slurry stopping effect, but the water stopping tank has small structure size, can not adopt blasting measures, can only adopt manual cutting, has low work efficiency, long construction period and large engineering investment. Besides, by adopting the structure of the grout stopping stems and the water stopping grooves, backfilling is required to be poured or backfilled by adopting a vertical die, the construction difficulty is high, the construction period is long, and particularly the construction quality of the top arch part is difficult to ensure, and the construction risk is high.
Disclosure of Invention
The invention aims to overcome the defects of the technology, and provides a hydraulic tunnel grouting structure and an arrangement method thereof, which have the advantages of simple and safe structure, convenient construction, short construction period and low cost.
The hydraulic tunnel grout stopping structure comprises a water stopping belt paved on the surface of a reinforced concrete lining, and further comprises a plurality of L-shaped flat irons arranged on the water stopping belt, wherein the water stopping belt comprises a horizontal plane water stopping belt paved on the surface of the reinforced concrete lining and a vertical plane water stopping belt perpendicular to the horizontal plane water stopping belt, at least one through long flat iron is pressed above the horizontal plane water stopping belt, the through long flat iron is parallel to a fold line of the water stopping belt, the through long flat iron is fixed on the reinforced concrete lining through expansion bolts, the distance between the through long flat iron and the fold line of the water stopping belt is larger than the length of the L-shaped flat iron horizontal part, the L-shaped flat iron horizontal part is pressed on the horizontal plane water stopping belt along the direction perpendicular to the fold line of the water stopping belt, the L-shaped flat iron horizontal part is fixed on the reinforced concrete lining through expansion bolts, the vertical plane water stopping belt is tightly attached to the vertical part of the L-shaped flat iron, and the L-shaped flat iron is fixed on the L-shaped flat iron vertical part through the water stopping belt arranged on the L-shaped flat iron vertical part.
Preferably, an adhesive layer is arranged between the horizontal plane water stop and the reinforced concrete lining.
Preferably, the expansion bolts are uniformly arranged on the through-long flat iron.
The arrangement method of the hydraulic tunnel grout stopping structure comprises the following steps:
a) Carrying out flattening treatment on the surface of the reinforced concrete lining, and vertically bending the water stop to form a horizontal plane water stop and a vertical plane water stop which are vertical to each other;
b) Uniformly and fully smearing an adhesive on the surface of the reinforced concrete lining to form an adhesive layer, tightly attaching the horizontal plane water stop belt to the surface of the reinforced concrete lining, pressing at least one through-length flat iron on the horizontal plane water stop belt along the direction parallel to the folding line of the water stop belt, enabling the distance between the through-length flat iron and the folding line of the water stop belt to be larger than the length of the horizontal part of the L-shaped flat iron, and fixing the through-length flat iron and the horizontal plane water stop belt on the reinforced concrete lining through expansion bolts;
c) Arranging a plurality of L-shaped flat irons on the water stop belt, pressing the horizontal parts of the L-shaped flat irons on the horizontal water stop belt along the direction perpendicular to the folding lines of the water stop belt, and fixing the horizontal parts on the reinforced concrete lining through expansion bolts;
d) And the vertical plane water stop is tightly attached to the vertical part of the L-shaped flat iron, and is fixed on the L-shaped flat iron through a fixing bolt arranged on the vertical part of the L-shaped flat iron.
Compared with the prior art, the invention has the following advantages:
1. the water stop belt is vertically bent and fixed by using the L-shaped flat iron, so that the problems of high difficulty in manual cutting of the water stop groove, complex construction process, low work efficiency, long construction period, high engineering investment and the like are solved;
2. the problems of high construction difficulty, complex process and long construction period of the pre-shrinking mortar are solved;
3. the grouting structure has the advantages of convenient construction, short construction period and low cost.
Drawings
FIG. 1 is a schematic bottom view of a hydraulic tunnel grouting structure according to the present invention;
FIG. 2 is a cross-sectional view of J1-J1 of FIG. 1;
FIG. 3 is a cross-sectional view of J2-J2 of FIG. 1;
FIG. 4 is a schematic view of a prior art stem;
fig. 5 is a schematic structural view of a conventional water stop groove.
The reference numerals of the components in the drawings are as follows:
reinforced concrete lining 1, water stop 2, L-shaped flat iron 3, horizontal water stop 4, vertical water stop 5, through long flat iron 6, fold line 7, expansion bolt 8, fixing bolt 9, bonding layer 10, sealing body concrete 11 and water stop groove backfill 12.
Detailed Description
The invention will now be described in further detail with reference to the drawings and to specific examples.
As shown in fig. 1, fig. 2 and fig. 3, the hydraulic tunnel grout stop structure comprises a water stop belt 2 paved on the surface of a reinforced concrete lining 1, and further comprises two L-shaped flat irons 3 arranged on the water stop belt 2, wherein the two L-shaped flat irons 3 are positioned at two ends of the water stop belt 2, the water stop belt 2 comprises a horizontal plane water stop belt 4 paved on the surface of the reinforced concrete lining 1 and a vertical plane water stop belt 5 perpendicular to the horizontal plane water stop belt 4, an adhesive layer 10 is arranged between the horizontal plane water stop belt 4 and the reinforced concrete lining 1, two through-length flat irons 6 are pressed above the horizontal plane water stop belt 4, the through-length flat irons 6 are fixed on the reinforced concrete lining 1 through expansion bolts 8 in parallel with fold lines 7 of the water stop belt 2, the through-length flat irons 8 are uniformly arranged on the through-length flat irons 6 and the fold lines 7 of the water stop belt 2, the horizontal plane water stop belt 4 is pressed on the horizontal plane water stop belt 4 along the direction perpendicular to the fold lines 7 of the water stop belt 2, the horizontal plane flat irons 3 are fixed on the vertical plane water stop belt 3 through expansion bolts 8 and the vertical plane water stop belt 3 are fixed on the vertical plane water stop belt 3 through the expansion bolts 9, and the through-length flat irons 3 are fixed on the vertical plane water stop belt 3 through the vertical plane 3.
The arrangement method of the hydraulic tunnel slurry stopping structure comprises the following steps:
a) Carrying out flattening treatment on the surface of the reinforced concrete lining 1, and vertically bending the water stop belt 2 to form a horizontal plane water stop belt 4 and a vertical plane water stop belt 5 which are vertical to each other;
b) Uniformly and fully smearing an adhesive on the surface of the reinforced concrete lining 1 to form an adhesive layer 10, tightly attaching a horizontal plane water stop belt 4 to the adhesive layer 10 on the surface of the reinforced concrete lining 1, pressing at least one through length flat iron 6 on the horizontal plane water stop belt 4 along the direction parallel to the folding line 7 of the water stop belt 2, wherein the distance between the through length flat iron 6 and the folding line 7 of the water stop belt 2 is greater than the length of the horizontal part of the L-shaped flat iron 3, and fixing the through length flat iron 6 and the horizontal plane water stop belt 4 on the reinforced concrete lining 1 through expansion bolts 8;
c) Two L-shaped flat irons 3 are arranged on the water stop belt 2, in the embodiment, the two L-shaped flat irons 3 are positioned at two ends of the water stop belt 2, and the horizontal parts of the L-shaped flat irons 3 are pressed on the horizontal plane water stop belt 4 along the direction perpendicular to the folding line 7 of the water stop belt 2 and are fixed on the reinforced concrete lining 1 through expansion bolts 8;
d) The vertical plane water stop belt 5 is tightly attached to the vertical parts of the two L-shaped flat irons 3, and the vertical plane water stop belt 5 is fixed on the L-shaped flat irons 3 through the fixing bolts 9 arranged on the vertical parts of the L-shaped flat irons 3.
When the reinforced concrete lining 1 is used, the horizontal plane water stop 4 and the vertical plane water stop 5 of the water stop 2 are fixed through the L-shaped flat iron 3, and the horizontal plane water stop 4 and the vertical plane water stop 5 are integrated, so that the problem of slurry leakage in a gap between the reinforced concrete lining 1 and the concrete of the blocking body is effectively prevented.
In Wu Dong de hydropower station engineering, this embodiment is used, and the specific cases are as follows: the diversion tunnel is a gate hole type, the size of the flow cross section is 16.5m multiplied by 24.0m, the permanent plugs are poured in 5 layers, if the traditional slurry stopping stem structure and the preshrinking mortar backfilling material are adopted, the preshrinking mortar needs to be paved and tamped layer by layer, steel wire brush bristles are adopted between the layers, the construction time of the lower 4 layers of slurry stopping ridge is 4 days/layer, the construction time of the slurry stopping stem at the top arch part of the 5 th layer is 6 days, the total construction time of the slurry stopping ridge is 22 days, and the construction period of the slurry stopping stem is longer; if the traditional water stop groove structure and the pre-shrinking mortar backfill material are adopted, the groove cutting construction time of the lower 4 layers of water stop grooves is estimated to be 2 days/layer, the pre-shrinking mortar backfill time is estimated to be 3 days/layer, the groove cutting construction time of the 5 th layer top arch part is estimated to be 4 days, the pre-shrinking mortar backfill time is estimated to be 4 days, the total water stop groove construction time is estimated to be 28 days, and the construction time is longer than the slurry stop stem construction time; if the technical scheme is adopted, the construction time of the lower 4 layers of slurry stopping ridges is 1.5 days/layer, the construction time of the slurry stopping stems at the 5 th layer of top arch parts is 2 days, and the total construction time of the slurry stopping stems is 8 days.
According to the hydraulic tunnel grouting stopping structure and the arrangement method thereof, the water stop belt 2 is vertically bent and fixed by the L-shaped flat iron 3, so that the problems of high difficulty in manual cutting of a water stop groove, complex construction process, low work efficiency, long construction period, large engineering investment and the like are solved; the problems of high construction difficulty, complex process and long construction period of the pre-shrinking mortar are solved, and the technical scheme is convenient to construct, short in construction period and low in cost.
Claims (3)
1. A method for arranging a hydraulic tunnel slurry stopping structure is characterized by comprising the following steps of: the hydraulic tunnel grout stopping structure comprises a water stop belt (2) paved on the surface of a reinforced concrete lining (1), and further comprises a plurality of L-shaped flat irons (3) arranged on the water stop belt (2), wherein the water stop belt (2) comprises a horizontal plane water stop belt (4) paved on the surface of the reinforced concrete lining (1) and a vertical plane water stop belt (5) perpendicular to the horizontal plane water stop belt (4), at least one through-long flat iron (6) is pressed above the horizontal plane water stop belt (4), the through-long flat iron (6) is parallel to a fold line (7) of the water stop belt (2), the through-long flat iron (6) is fixed on the reinforced concrete lining (1) through an expansion bolt (8), the distance between the through-long flat iron (6) and the water stop belt (2) is larger than the length of a horizontal part of the L-shaped flat iron (3), the horizontal part of the L-shaped flat iron (3) is pressed on the horizontal plane water stop belt (4) along the direction perpendicular to the fold line (7), the horizontal plane water stop belt (3) is tightly attached to the horizontal plane water stop belt (3) through the expansion bolt (8), the horizontal flat iron (3) is tightly attached to the vertical plane water stop belt (3) through the expansion bolt (8), the vertical plane water stop belt (5) is fixed on the L-shaped flat iron (3) through a fixing bolt (9) arranged on the vertical part of the L-shaped flat iron (3);
the arrangement method comprises the following steps:
a) Carrying out flattening treatment on the surface of the reinforced concrete lining (1), and vertically bending the water stop (2) to form a horizontal plane water stop (4) and a vertical plane water stop (5) which are vertical to each other;
b) Uniformly and fully smearing an adhesive on the surface of the reinforced concrete lining (1) to form an adhesive layer (10), tightly attaching the horizontal plane water stop (4) to the adhesive layer (10) on the surface of the reinforced concrete lining (1), pressing at least one through long flat iron (6) on the horizontal plane water stop (4) along the direction parallel to the folding line (7) of the water stop (2), wherein the distance between the through long flat iron (6) and the folding line (7) of the water stop (2) is larger than the length of the horizontal part of the L-shaped flat iron (3), and fixing the through long flat iron (6) and the horizontal plane water stop (4) on the reinforced concrete lining (1) through expansion bolts (8);
c) Arranging a plurality of L-shaped flat irons (3) on the water stop belt (2), pressing the horizontal parts of the L-shaped flat irons (3) on the horizontal water stop belt (4) along the direction perpendicular to the folding lines (7) of the water stop belt (2), and fixing the horizontal water stop belt on the reinforced concrete lining (1) through expansion bolts (8);
d) The vertical plane water stop (5) is tightly attached to the vertical part of the L-shaped flat iron (3), and the vertical plane water stop (5) is fixed on the L-shaped flat iron (3) through a fixing bolt (9) arranged on the vertical part of the L-shaped flat iron (3).
2. The arrangement method of the hydraulic tunnel grout stopping structure according to claim 1, characterized by comprising the following steps: an adhesive layer (10) is arranged between the horizontal plane water stop belt (4) and the reinforced concrete lining (1).
3. The arrangement method of the hydraulic tunnel grout stopping structure according to claim 2, characterized by comprising the following steps: the expansion bolts (8) are uniformly arranged on the through-length flat iron (6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910464552.0A CN110080181B (en) | 2019-05-30 | 2019-05-30 | Hydraulic tunnel grouting structure and arrangement method thereof |
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| CN201910464552.0A CN110080181B (en) | 2019-05-30 | 2019-05-30 | Hydraulic tunnel grouting structure and arrangement method thereof |
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| CN110080181B true CN110080181B (en) | 2023-10-17 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113981904A (en) * | 2021-11-02 | 2022-01-28 | 湖北省水利水电规划勘测设计院 | Water stopping installation structure and method between new concrete and old concrete |
| CN114541331A (en) * | 2022-01-29 | 2022-05-27 | 中国葛洲坝集团第二工程有限公司 | Copper sheet water stop construction method |
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| US4041665A (en) * | 1975-11-22 | 1977-08-16 | Vredestein N.V. | Injection sealable waterstop and method of installing same |
| CN1730847A (en) * | 2005-08-05 | 2006-02-08 | 上海市隧道工程轨道交通设计研究院 | Water stop and inside attachment type mounting method therefor |
| CN102900102A (en) * | 2012-04-27 | 2013-01-30 | 常州第一建筑集团有限公司 | Basement bottom plate having advanced-waterstop post-cast strip structure |
| CN103526759A (en) * | 2013-10-26 | 2014-01-22 | 葛洲坝集团第一工程有限公司 | Concrete faced rockfill dam water stop mortar bed construction trolley |
| CN107724351A (en) * | 2017-11-14 | 2018-02-23 | 长江勘测规划设计研究有限责任公司 | A kind of diversion tunnel vertical cyclindrical shape stopper structure pattern and method |
| CN208040411U (en) * | 2018-04-13 | 2018-11-02 | 中国葛洲坝集团第五工程有限公司 | Tunnel rubber fastening band fixed structure |
| CN108867587A (en) * | 2018-07-10 | 2018-11-23 | 贵州大学 | A kind of plugging structure of the permanent plug of water conservancy diversion tunnel |
| CN210262964U (en) * | 2019-05-30 | 2020-04-07 | 长江勘测规划设计研究有限责任公司 | Grout stopping structure of hydraulic tunnel |
-
2019
- 2019-05-30 CN CN201910464552.0A patent/CN110080181B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4041665A (en) * | 1975-11-22 | 1977-08-16 | Vredestein N.V. | Injection sealable waterstop and method of installing same |
| CN1730847A (en) * | 2005-08-05 | 2006-02-08 | 上海市隧道工程轨道交通设计研究院 | Water stop and inside attachment type mounting method therefor |
| CN102900102A (en) * | 2012-04-27 | 2013-01-30 | 常州第一建筑集团有限公司 | Basement bottom plate having advanced-waterstop post-cast strip structure |
| CN103526759A (en) * | 2013-10-26 | 2014-01-22 | 葛洲坝集团第一工程有限公司 | Concrete faced rockfill dam water stop mortar bed construction trolley |
| CN107724351A (en) * | 2017-11-14 | 2018-02-23 | 长江勘测规划设计研究有限责任公司 | A kind of diversion tunnel vertical cyclindrical shape stopper structure pattern and method |
| CN208040411U (en) * | 2018-04-13 | 2018-11-02 | 中国葛洲坝集团第五工程有限公司 | Tunnel rubber fastening band fixed structure |
| CN108867587A (en) * | 2018-07-10 | 2018-11-23 | 贵州大学 | A kind of plugging structure of the permanent plug of water conservancy diversion tunnel |
| CN210262964U (en) * | 2019-05-30 | 2020-04-07 | 长江勘测规划设计研究有限责任公司 | Grout stopping structure of hydraulic tunnel |
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