CN104514216A - Fill channel anti-frost heaving and anti-seepage structure and construction method - Google Patents
Fill channel anti-frost heaving and anti-seepage structure and construction method Download PDFInfo
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- CN104514216A CN104514216A CN201310443467.9A CN201310443467A CN104514216A CN 104514216 A CN104514216 A CN 104514216A CN 201310443467 A CN201310443467 A CN 201310443467A CN 104514216 A CN104514216 A CN 104514216A
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- frost heaving
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B13/00—Irrigation ditches, i.e. gravity flow, open channel water distribution systems
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
Abstract
The invention discloses a fill channel anti-frost heaving and anti-seepage structure and a construction method. The structure is characterized in that drainage channels are arranged on the two sides of the channel; a wind-blown sand layer is arranged on the bottom and two sides of an embankment of the channel; a plastic film is arranged on the wind-blown sand layer; a slope toe on a connection position of the bottom and the embankment of the channel is cast-in-place concrete; prefabricated concrete blocks are laid on the plastic film; and a capping concrete board is arranged on the top of the embankment of the channel. The construction method comprises the following steps: digging a drainage open channel; clearing channel base earth; carrying out filling to form the embankment of the channel; laying wind-blown sand; laying the plastic film; casting the arc channel-bottom concrete in place; laying the prefabricated concrete blocks; and laying the capping concrete board. The problems of the common channel design such as seepage, frost heaving and destruction, and not stable quality are eliminated, the wind-blown sand layer is arranged on the bottom and the two sides of the embankment of the channel, the foundation bearing force is increased, the frost heaving is lightened; the polyethylene plastic film is laid on the wind-blown sand layer to prevent seepage of the channel; concrete is arranged on the film to prevent water flow from scouring and seeping; the concrete arc channel bottom is cast in place, the stress condition is good and the stress concentration is prevented; and the drainage open channel prevents underground water retention and eliminates frost heaving.
Description
Technical field
The invention belongs to Hydraulic Structure Engineering technical field, particularly hydraulic engineering canal on embankment frost heaving resistant leakage preventing structure and construction method.
Background technology
Agricultural water be China use water rich and influential family, according to statistics, China's Water Consumption in Agriculture accounts for more than 70% of whole nation year water total amount, and China at present oneself builds dry, branch canal and has a large amount of channels not have antiseepage, water efficiency of canal system is very low, and a large amount of irrigation waters have lost in channel hydraulic pipeline process, especially the such water resource assignment inequality of China, and very deficient area again, canal seepage is the immediate cause causing water efficiency of canal system not high.After the anti-seepage of channels, can improve the utilization rate of water on the one hand, alleviate agricultural water imbalance between supply and demand, the water of saving can be brought more land under irrigation, and promotes the development of agricultural production; On the other hand can dewatering, salt-soda soil and swamp land prevented and improved, ecological environment and modernization construction are conducive to.Therefore, further develop and channels seepage control project technology, to alleviation China's the contradiction of supply and demand for the water resource and national sustained economic development, there is important strategic importance.
The anti-seepage of channels is the current most widely used water-saving engineering technology of China, the materials such as conventional earth material, cement-soil, stone-laying, concrete, bituminous concrete and coating materials are as anti-seepage of channels layer, reach the object preventing canal seepage, " " Anti-seepage Engineering Techniques for Irrigation Canals specification " " (GB/T 50600-2010) that country promulgates just proposes requirement to the design of various method for preventing leakage canal and construction.In the design of the common anti-seepage of channels, general what adopt is plastic film antiseepage, and having the area washed away, also have and adopt concrete slab and the two anti-method of plastic film, concrete slab not only can resist current scour, and can play the effect of associating antiseepage with plastic film.
But for the channel of cold district, except there being the requirement of antiseepage, also have the requirement of frost heaving resistant.Above-mentioned plastic film is anti-to be blended concrete slab antiseepage and has the advantages such as good seepage-proof property, erosion resistibility are strong, but its frost heaving resistant performance is not satisfactory.If frost heaving resistant issue handling is bad, not only do not have the effect of antiseepage, and concrete slab and plastic film jacking may be destroyed due to frost heave, waste resource and fund.
So not only require antiseepage for the Open Channel Construction of some ruthless area, have antiscour again, the technology more requiring freeze proof requirement does not but have concrete and clear and definite regulation, limit and constrain development and the popularization of these canal in area Lining Techniques to a certain extent, therefore in the channel building of cold district in the urgent need to a kind of can play antiseepage, protection against erosion again can the economically viable construction technology of frost heaving resistant.
Summary of the invention
The object of the present invention is to provide a kind of canal on embankment frost heaving resistant leakage preventing structure, overcome existing channel seepage technique and can not take into account the defect that anti-impact prevents blending frost heaving resistant requirement simultaneously.
To achieve these goals, technical scheme of the present invention is as follows: a kind of canal on embankment frost heaving resistant leakage preventing structure, it is characterized in that being equipped with aeolian sand bed course at channel bottom and Qu Di side, is provided with plastic film on aeolian sand bed course; Plastic film is provided with concrete.Wherein at the bottom of canal and at the bottom of canal and Qu Di junction is cast-in-situ concrete, arranges precast concrete inside canal dike, and there is the concrete block that bears down on one in canal levee crown portion.In channel both sides, gutter is set.
The concrete slab adopted and antiseepage plastic film not only can well play the function of composite anti-penetrating and protection against erosion, and the aeolian sand bed course laid on channel bottom and canal dike, drainage is better, and cut off the capillary water of ground, eliminate the water level condition forming frost heave, prevent the gathering of soil salt simultaneously, there is the effect that control salt is swollen, ensure that the safety and stability of canal lining structure; Structure at the bottom of the cast-in-place arc canal of channel toe, substantially improve the frost heave stress condition of liner structure, reduce the possibility of frost heave, simultaneously Qu Di both sides arrange the seriation of factory of precast concrete block system generate, ensure that concrete compactness and intensity, reduce the possibility of freeze-thaw damage, the shape of six prismatics of employing also improves stress condition, alleviates frost heave to greatest extent.All aeolian sand bed courses and concrete block all according to channel on the sunny side and in the shade and channel water level adopt different thickness up and down, not only reduce engineering quantity, investment reduction, and the thickness adopted all combines the ambient conditionss such as meteorology, the hydrology, geology and determines, make the more reliable and safety of method.
Another object of the present invention is to provide a kind of channel frost heaving resistant leakage preventing structure construction method, overcome existing channel seepage technique and can not take into account the defect that anti-impact prevents blending frost heaving resistant requirement simultaneously.
To achieve these goals, technical scheme of the present invention is as follows: a kind of channel frost heaving resistant leakage preventing structure construction method, its technical characteristic is: a, channel both sides excavation trapezoidal cross-section gutter; B, in canal dike, lay sandy loam and roll; C, along the longitudinal concreting partition wall of channel; D, at the bottom of canal and the clean aeolian sand of Qu Di both sides backfill; E, to set up defences ooze plastic film on the aeolian sand bed course upper berth laid, canal levee crown portion plastic film excavation groove is imbedded, top aeolian sand landfill; F, making cement mortar bedding cushion cast-in-situ concrete on canal bottom part antiseepage plastic film; G, junction making cement mortar bedding cushion cast-in-situ concrete at the bottom of Qu Di and canal; H, on Qu Di side antiseepage plastic film making cement mortar build precast concrete block by laying bricks or stones; I, cast-in-place or lay prefabricating coping concrete block in canal levee crown portion, the parting fines concrete between concrete slab tamps.
At the bottom of described canal and the cast-in-situ concrete of Qu Di junction be arc; Described canal dike precast concrete block is six prismatics; Described antiseepage plastic film material can be polyethylene, polyvinyl chloride or composite geo-membrane.
Advantage of the present invention and effect are: at the bottom of canal and Qu Di both sides adopt the backfill of aeolian sand bed course, well freeze proof, heat insulation effect can be played, prevent the effect that salt is swollen in addition simultaneously; The advantages such as seepage by geo-textile plastic film has that adaptive deformation ability is strong, easy construction, cost are low, not only can cut off capillary water on invade, and the seepage that channel water can be prevented downward, effectively improves water efficiency of canal system; Prefabricate concrete block ensure that concrete intensity and compactness, and six prismatics have good stress condition, and concrete block not only can prevent seepage simultaneously, and also has extraordinary antiscour effect; Adopt at the bottom of cast-in-place concrete arc-shaped canal between Qu Di and canal base concrete block, solve the problem of trapezoidal section canal stress condition difference in the past, increase the ability of frost heaving resistant distortion; Outside canal dike, excavation has gutter, can effectively reduce groundwater table, alleviates the inducement that canal frost heave destroys.Working procedure of the present invention is simple and clear, on the basis of traditional construction technology, compound anti-freezing is swollen, the effect of antiseep and protection against erosion to adopt the structure of aeolian sand bed course, seepage by geo-textile plastic film, precast concrete block and gutter composition to serve, easy to operate, facility simple, economical and efficient.
Accompanying drawing explanation
Fig. 1 is drawing in side sectional elevation of the present invention.
Fig. 2 is plan view of the present invention.
Fig. 3 is precast concrete block drawing of the present invention.
Fig. 4 is I-I sectional drawing of the present invention.
Fig. 5 is that canal dike of the present invention bears down on one drawing.
In the drawings: 1. canal levee foundation soil; 2. gutter; 3. canal dike; 4. aeolian sand bed course; 5. seepage by geo-textile plastic film; 6. cement mortar bedding cushion; 7. at the bottom of concrete canal; 8. precast concrete block; 9. arc concrete toe; 10. bear down on one concrete block; 11. concrete partitions; 12. asphalt polyurethanes; 13. fines concrete.
Detailed description of the invention
The specific embodiment of the present invention is described in detail, as shown in Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5 below in conjunction with technical scheme and accompanying drawing.Protection scope of the present invention is not limited only to the description of present embodiment.
As Fig. 1,2,3, shown in 4 and 5, a kind of channel frost heaving resistant leakage preventing structure and construction method, be made up of aeolian sand bed course 4, seepage by geo-textile plastic film 5, precast concrete block 8, arc concrete toe 9 and gutter 2, at seepage by geo-textile plastic film 5, at the bottom of concrete canal 7, between precast concrete block 8 and arc concrete toe 9, be provided with cement mortar bedding cushion 6.
A kind of channel frost heaving resistant leakage preventing structure and construction method, its construction sequence is:
(1) cleaned out by the canal levee foundation soil 1 within the scope of canal cross section with bulldozer, cleaning thickness is determined according to geological conditions, is not less than 20cm, until the fresh soil body;
(2) in the gutter 2 of channel both sides excavation trapezoidal cross-section, not only can prevent canal frost heave by dewatering, can also Pedotransfer function be prevented.
(3) dig loose canal levee foundation soil 1 surface and suitably sprinkle water moistening, with dump truck, satisfactory sandy loam is transported to canal dike 3 position, every layer of paving soil thickness is not more than 20cm, earth material must not contain weeds, roll with the duplex sheep-foot roller of construction machinery traction 5-7 ton, machine travel speed is not more than 3km/h, and dry density is not less than 1.65t/m
3, degree of compaction is not less than 0.98, and canal dike 3 is laid width and is respectively greater than inside channel and outside and is not less than 50cm;
(4) channel longitudinally establishes concrete partition every 8 ~ 10m 11 one, is widely not less than 300mm, is deeply greater than 500mm and imbeds the soil body to be not less than 200mm, and directly at the bottom of Qu Di and canal, excavate the soil body and frame shuttering, cast-in-place intensity is not less than the concrete of 250#.Concrete partition 11 is as the permanent shrinkage joint of channel, if lining canal has destruction to be convenient to R and M.
(5) manually the canal dike 3 rolled is cut slope to design section, clean aeolian sand bed course 4 is backfilled to canal dike 3 both sides from the bottom of canal, the granule content that particle diameter is less than 1mm is not more than 5%, mud content must not more than 5%, manually to sprinkle water and by manually adopting plate vibrator vibration compacting, coefficient of consolidation is not less than 0.96 simultaneously.Wherein aeolian sand bed course 4 canal base thickness degree is not less than 15cm, and on sunny slope and water level, thickness is not less than 6cm, and under in the shade and water level, thickness is not less than 8cm.Aeolian sand bed course 4 can cut off the capillary water of ground, eliminates the water level condition forming frost heave, prevents the gathering of soil salt simultaneously, has the effect that control salt is swollen;
(6) on the aeolian sand bed course 4 of acceptance(check), seepage by geo-textile plastic film 5 is laid, thickness is not less than 0.25mm, seepage by geo-textile plastic film 5 answers view picture to lay, reduce joint as far as possible, should lay from upstream toward downstream, channel one bank to another bank, lap-joint upstream one width covers on the width of downstream, lap length is not less than 30cm, employing heated bitumen is bonding, constructor must wear the walking shoes operation without shoe tack, seepage by geo-textile plastic film 5 must not be trampled on by attention, has damaged part to repair in time, and the seepage by geo-textile plastic film 5 subsidized should be greater than hole area more than one times.Seepage by geo-textile plastic film 5 should be close to aeolian sand, and bubble should be discharged in time; Seepage by geo-textile plastic film 5 should carry out bonding when running into concrete partition 11, and bends downwards, guarantees that lap length is not less than 200mm, simultaneously at canal levee crown portion excavation triangular groove section, antiseepage plastic film is close to section and imbeds, imbed aeolian sand and tamp on plastic film;
(7) template of a vertical cast-in-situ concrete on the seepage by geo-textile plastic film 5 laid at the bottom of canal, template should have certain rigidity, can not positioning when guaranteeing to build.Seepage by geo-textile plastic film 5 must not be trampled in construction, at the bottom of cast-in-situ concrete canal, a point block length of 7 is determined according to canal cross section size, is generally greater than 1m.Checking template and confirming to want making intensity on the seepage by geo-textile plastic film 5 of at the bottom of concreting canal 7 to be not less than the cement mortar bedding cushion 6 of 100#;
(8) by the concrete material that mixes by the bottom of chute Secondary Transport to canal, vibrate with plate vibrator after putting in storage, manually wipe one's face.Be strictly on guard against in concreting process that separation, bleeding and slump reduce, adopt piecemeal to jump storehouse method construction, concrete grade is not less than 200#, and canal base concrete thickness is not less than 8cm;
(9) at the bottom of cast-in-situ concrete canal 7 reach prescribed strength after; at the bottom of vertical concrete canal 7 and the template of Qu Di junction arc concrete toe 9; also piecemeal is adopted to install the method for template; point block length is not less than 1m; template is the standard arc template processed in advance; guarantee that arc formwork is firm, seepage by geo-textile plastic film 5 must not be trampled in construction.After the template checking arc concrete toe 9 is reliably errorless, in the arc concrete toe 9 that will build, on seepage by geo-textile plastic film 5, making intensity is not less than the cement mortar bedding cushion 6 of 100#;
(10) concrete material mixed extremely has been propped up the concrete arc-shaped toe 9 of template by chute Secondary Transport; cambered surface elevation is guaranteed in the bracing wire of adjacent modular arc wooden form; vibrate with plate vibrator, manually wipe one's face shaping, concrete grade is not less than 200#.Be strictly on guard against in concreting process that separation, bleeding and slump reduce, adopt piecemeal to jump storehouse method construction; Concrete arc-shaped toe 9 solves the problem of the easy frost heaving failure of rectangular canal toe, has good stress performance, can well adapt to frost-heaving deformation, and the concrete thickness thinnest part of arc toe is not less than 7cm;
(11) by for subsequent use to canal top for precast concrete block 8 mechanical transport be pre-installed in factory for prefabrication, prefabricated section is six prismatics, wherein the thickness of sunny slope and the above concrete precast block 8 of waterline is not less than 5cm, and the thickness of in the shade and the following concrete precast block 8 of waterline is not less than 7cm.Treat that arc concrete toe 9 base plate strength reaches after 70%, bottom-up on canal dike seepage by geo-textile plastic film 5 making intensity be not less than the cement mortar bedding cushion 6 of 100#.Manually the precast concrete block 8 being placed on canal top is carried to construction place, on cement mortar, between making precast concrete block 8, six rib block, parting is wide is 2.5cm, guarantees that precast concrete block 8 slurry is full, firmly.Six prismatic mechanical characteristics comparatively rectangle are good, and piecemeal is less simultaneously, well can adapt to frost-heaving deformation;
(12) by the parting unification between precast concrete block 8 by manually filling recessed joint with 100# fines concrete 13, shrinkage joint will stitch with air compressor before filling in foreign material, dust remove clean, inner drying is stitched in maintenance.Also in stitching with air compressor before the permanent shrinkage joint filling of concrete partition 11, foreign material, dust are removed clean, and keep stitching inner drying, bottom adopts asphalt polyurethane 12, and top 1-2cm adopts fines concrete 13 joint filling.
(13) cast-in-place or prefabricated on the Qu Di upper berth concrete block 10 that bears down on one, the parting fines concrete 13 beared down on one between concrete block 10 tamps, and prevents rainwater etc. from infiltrating the rear portion of lining canal, causes the anti-seepage of channels and freeze proof inefficacy.
Claims (10)
1. a canal on embankment frost heaving resistant leakage preventing structure, is characterized in that being equipped with aeolian sand bed course at channel bottom and Qu Di side, is provided with plastic film on aeolian sand bed course; Plastic film is provided with concrete.
2. a kind of channel frost heaving resistant leakage preventing structure according to claim 1, is characterized in that: arrange gutter in channel both sides.
3. a kind of channel frost heaving resistant leakage preventing structure according to claim 1, is characterized in that: wherein at the bottom of canal and at the bottom of canal and Qu Di junction is cast-in-situ concrete, arranges precast concrete inside canal dike, and there is the concrete block that bears down on one in canal levee crown portion.
4. a kind of channel frost heaving resistant leakage preventing structure according to claim 4, it is characterized in that: the toe cast-in-situ concrete of at the bottom of canal and Qu Di junction is arc, canal dike precast concrete block is six prismatics.
5. a kind of channel frost heaving resistant leakage preventing structure according to claim 1, it is characterized in that: aeolian sand bed course canal base thickness degree is not less than 15cm, on canal dike sunny slope and water level, thickness is not less than 6cm, under the canal levee back back and water level, thickness is not less than 8cm, the thickness of sunny slope and the above concrete precast block of waterline is not less than 5cm, and the thickness of in the shade and the following concrete precast block of waterline is not less than 7cm.
6. a kind of channel frost heaving resistant leakage preventing structure according to claim 1, is characterized in that: antiseepage plastic film material is polyethylene, polyvinyl chloride or composite geo-membrane.
7. a channel frost heaving resistant leakage preventing structure construction method, its technical characteristic is: a, channel both sides excavation trapezoidal cross-section gutter; B, in canal dike, lay sandy loam and roll; C, along the longitudinal concreting partition wall of channel; D, at the bottom of canal and the clean aeolian sand of Qu Di both sides backfill; E, to set up defences ooze plastic film on the aeolian sand bed course upper berth laid, canal levee crown portion plastic film excavation groove is imbedded, top aeolian sand landfill; F, making cement mortar bedding cushion cast-in-situ concrete on canal bottom part antiseepage plastic film; G, junction making cement mortar bedding cushion cast-in-situ concrete at the bottom of Qu Di and canal; H, on Qu Di side antiseepage plastic film making cement mortar build precast concrete block by laying bricks or stones; I, cast-in-place or lay prefabricating coping concrete block in canal levee crown portion, the parting fines concrete between concrete slab tamps.
8. a kind of channel frost heaving resistant leakage preventing structure construction method according to claim 7, is characterized in that: at the bottom of described canal and the cast-in-situ concrete of Qu Di junction be arc; ; Described canal dike precast concrete block is six prismatics.
9. a kind of channel frost heaving resistant leakage preventing structure construction method according to claim 7, is characterized in that: described antiseepage plastic film material can be polyethylene, polyvinyl chloride or composite geo-membrane.
10. a kind of channel frost heaving resistant leakage preventing structure construction method according to claim 7, is characterized in that: in step c, and channel longitudinally establishes one concrete partition every 8 ~ 10m, is widely not less than 300mm, is deeply greater than 500mm and imbeds the soil body to be not less than 200mm.
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| CN201310443467.9A CN104514216B (en) | 2013-09-26 | 2013-09-26 | A kind of canal on embankment frost heaving resistant leakage preventing structure and construction method |
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| CN201310443467.9A CN104514216B (en) | 2013-09-26 | 2013-09-26 | A kind of canal on embankment frost heaving resistant leakage preventing structure and construction method |
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| CN104514216B CN104514216B (en) | 2017-11-14 |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104846851A (en) * | 2015-05-26 | 2015-08-19 | 中国化学工程第三建设有限公司 | Construction method of foundation-side non-frost-heaving layer |
| CN106759123A (en) * | 2017-01-06 | 2017-05-31 | 石河子大学 | The method for eliminating the canal for water conveyance frost heaving failure effect that Frozen Area winter is run without ice sheet, high water level |
| CN106906796A (en) * | 2017-02-28 | 2017-06-30 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of method and structure for anti-seepage of channels anti-freeze expansion |
| CN108166455A (en) * | 2017-12-21 | 2018-06-15 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of construction method and structure of High-cold regions excavation channel anti-freeze expansion |
| CN109281299A (en) * | 2018-10-22 | 2019-01-29 | 浙江水利水电学院 | A kind of construction method of water conservancy agricultural irrigation anti-seepage channel |
| CN109723043A (en) * | 2019-01-11 | 2019-05-07 | 中灌顺鑫华霖科技发展有限公司 | Irrigation and drainage Open Channel Construction method |
| CN109853469A (en) * | 2019-01-31 | 2019-06-07 | 深圳春沐源控股有限公司 | Antiseepage dykes and dams |
| CN111945671A (en) * | 2020-07-27 | 2020-11-17 | 中电建十一局工程有限公司 | Construction method of concrete tooth wall at channel toe |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104846851A (en) * | 2015-05-26 | 2015-08-19 | 中国化学工程第三建设有限公司 | Construction method of foundation-side non-frost-heaving layer |
| CN106759123A (en) * | 2017-01-06 | 2017-05-31 | 石河子大学 | The method for eliminating the canal for water conveyance frost heaving failure effect that Frozen Area winter is run without ice sheet, high water level |
| CN106759123B (en) * | 2017-01-06 | 2018-11-20 | 石河子大学 | The method for eliminating the canal for water conveyance frost heaving failure effect that Frozen Area winter runs without ice sheet, high water level |
| CN106906796A (en) * | 2017-02-28 | 2017-06-30 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of method and structure for anti-seepage of channels anti-freeze expansion |
| CN106906796B (en) * | 2017-02-28 | 2019-11-26 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of method and structure for anti-seepage of channels anti-freeze expansion |
| CN108166455A (en) * | 2017-12-21 | 2018-06-15 | 水利部交通运输部国家能源局南京水利科学研究院 | A kind of construction method and structure of High-cold regions excavation channel anti-freeze expansion |
| CN108166455B (en) * | 2017-12-21 | 2020-03-03 | 水利部交通运输部国家能源局南京水利科学研究院 | Construction method and structure for preventing frost heaving of excavation channel in high and cold area |
| CN109281299A (en) * | 2018-10-22 | 2019-01-29 | 浙江水利水电学院 | A kind of construction method of water conservancy agricultural irrigation anti-seepage channel |
| CN109723043A (en) * | 2019-01-11 | 2019-05-07 | 中灌顺鑫华霖科技发展有限公司 | Irrigation and drainage Open Channel Construction method |
| CN109853469A (en) * | 2019-01-31 | 2019-06-07 | 深圳春沐源控股有限公司 | Antiseepage dykes and dams |
| CN111945671A (en) * | 2020-07-27 | 2020-11-17 | 中电建十一局工程有限公司 | Construction method of concrete tooth wall at channel toe |
| CN111945671B (en) * | 2020-07-27 | 2021-07-09 | 中电建十一局工程有限公司 | Construction method of concrete tooth wall at channel toe |
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