CN106759126A - Construction method of side slope support drainage channel - Google Patents

Construction method of side slope support drainage channel Download PDF

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Publication number
CN106759126A
CN106759126A CN201710104142.6A CN201710104142A CN106759126A CN 106759126 A CN106759126 A CN 106759126A CN 201710104142 A CN201710104142 A CN 201710104142A CN 106759126 A CN106759126 A CN 106759126A
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construction
concrete
shaped
construction method
canal
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CN106759126B (en
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周峰
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China Chemical Civil Engineering Co ltd
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Chemical Industry Geotechnical Engineering Co ltd
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B5/00Artificial water canals, e.g. irrigation canals
    • E02B5/02Making or lining canals
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02BHYDRAULIC ENGINEERING
    • E02B11/00Drainage of soil, e.g. for agricultural purposes
    • E02B11/005Drainage conduits

Abstract

The invention discloses a construction method of a side slope support drainage channel, which comprises the steps of pouring a U-shaped channel at the slope toe of a collapsible loess high and steep side slope in the northwest of high and cold regions for drainage, filling and replacing lime soil in a foundation trench, arranging a broken stone cushion layer at the bottom of the channel and paving a composite geomembrane at the bottom of the U-shaped soil mold, improving the nonuniformity of expansion deformation distribution of the channel, reducing frost heaving, reducing the slab staggering phenomenon of cracks and foundation soil collapse, and effectively preventing frost heaving deformation and leakage at construction joints.

Description

A kind of construction method of slope retaining drainage ditch
Technical field
The present invention relates to a kind of gutter construction of side slope toe, and in particular to one kind is used for northwest extremely frigid zones settlement by soaking The drainage ditch construction method of loess high gradient slope.
Background technology
High and cold the Northwest's collapsible loess high gradient slope, due to being washed away by short-term rainwater and accumulated snow melt water, corroded easily Coombe is formed, even the avalanche of soil body oxygen blast cyanidation is destroyed, Slope Stability has severe compromise.How effectively to solve high and cold The anti-key issue for blending anti-freeze expansion problem always slope project Drainage Design and construction of area drain ditch.
Existing side slope toe carries out draining routinely using reinforced concrete rectangular gutter, is grouted in building stones abundance region Slabstone gutter, or clay brick masonry gutter, although can partly improve antiseepage and the anti-freeze expansion performance in gutter, but because Its speed of application is slow, and cost is high, fails to find broad application and popularization.
The content of the invention
The invention aims to solve defect present in prior art, there is provided a kind of construction technology is simple, cost It is low, and the slope retaining drainage ditch construction method of antiseepage and anti-freeze expansion performance can be effectively improved.
In order to achieve the above object, the invention provides a kind of construction method of slope retaining drainage ditch, including following step Suddenly:
(1)Positioning measurement:At side slope toe, positioning measurement, measuring drainage ditch center line;
(2)Foundation trench is excavated::Foundation trench excavation is carried out using mini-excavator;
(3)Lime-soil cushion:Grey earthen backfill is carried out in foundation trench;
(4)Laying composite earthwork cloth:Longitudinal direction extends laying composite earthwork cloth along drainage ditch center line to both sides;
(5)Laying blotter:Blotter is laid above foundation trench bottom, composite earthwork cloth;
(6)Clay model is constructed:Clay model construction is carried out in foundation trench, U-shaped clay model is formed;
(7)U-shaped canal construction:Using coffering machine, concrete construction is carried out, the U-shaped canal of lining cutting in foundation trench, above U-shaped clay model is supported Shield;
(8)Repair U-shaped trench side:Maturing is poured, maintenance;
(9)Construction joint is constructed.
Wherein, step(2)The depth that middle foundation trench is excavated is 700-750mm;When mean annual precipitation is 180~350mm, slope Face area is 12000-20000m2When, the step(6)Middle clay model specification is:Bottom arc radius are 350-400mm, radian It it is 145-152 °, top width is 900-950mm;When mean annual precipitation is less than 180mm, domatic area is 8000-12000m2 When, the step(6)Middle clay model specification is:Bottom arc radius are 300-350mm, and radian is 135-145 °, and top width is 850-900mm;Step(6)In should be preferential using the foundation soil for excavating out for the soil that is backfilling and compacted clay model, soil should be uniform, does not have The water content for having the debris such as rubble, grass roots, soil should be controlled between 16~20, if backfill is relatively dry, should be using watering Method adjust the water content of backfill, if water content is larger, should be using the method such as draining, drying, soil removal and replacement, by water content control In allowed limits;Step(7)In the bottom of U-shaped canal be semicircle or arc, upper end both sides are along bottom semicircular or arc The straightway that shape two ends tangential direction extends, wherein straightway are 0-16 ° with the angle of vertical direction, and preferably angle is 10- 14°;The wall thickness of U-shaped canal is 100mm.
The preferred specification of U-shaped canal is:152 ° of bottom circular arc radian, arc radius 300mm, width 718mm suitable for reading, wetted perimeter 1.357。
Step(3)Middle dirt proportioning is 2:8.
Step(5)The thickness of medium stone bed course be 100mm, the macadam gradating for using for:Particle diameter not surpassing less than 31.5mm Cross 90%, particle diameter less than 16mm no more than 15%, particle diameter less than 10mm no more than 5%).
Step(7)And step(8)The concrete of middle use is prepared from by the raw material of following weight proportion:42.5 grades are combined Portland cement:Sand:Particle size is the cobble of 0.5-2cm:Particle size is the cobble of 2-4cm:Water=1:1.81:1.32: 1.62:0.46。
Step(9)Middle construction joint work progress is:In step(7)And step(8)With batten in coagulation during casting concrete Construction joint is separated out on soil, or in step(7)And step(8)Carry out unifying cutting during maintenance after concrete construction;Then exist Pitch or filling flax pitch are poured in construction joint.
The present invention has advantages below compared to existing technology:
1st, the present invention is constructed by the way that side slope sough is designed as into U-shaped canal, U-shaped compared with trapezoidal or rectangular cross section irrigation canals and ditches Canal has velocity flow profile uniform, and near optimal hydraulic fracture, flow velocity is very fast, and canal bottom has certain antiarch to act on, and improves canal The inhomogeneities of road dilatancy distribution, mitigates frost heave, reduces crack and faulting of slab ends phenomenon.
2nd, carry out lime-soil cushion by foundation trench, blotter and clay model bottom laying composite geo-membrane are added at canal bottom, to U Type canal entirety stress and deformation have larger improvement, can effectively prevent frost-heaving deformation and prevent seepage at construction joint, can be normal Advise the wall thickness that U-shaped canal is suitably reduced on the basis of U-shaped canal.
3rd, the construction of U-shaped canal is carried out by coffering machine, can be adopted according to different side slope shelvings and the unduation grade of landform With different coffering machine moulds, the usage amount of armored concrete water channel template is reduced, the usage amount of timber is lowered significantly, while Using cast-in-place U-shaped canal construction technology, mechanical execution, one-shot forming, construction noise is small, and occupancy construction site is small, and speed of application is fast, High efficiency.And without substantial amounts of rubble, clay brick in work progress, it is to avoid mine and clay resource to nonrenewable resources Using consumption, the requirement of environmental protection, green construction is reached.
4th, the construction technology of side slope supporting drainage ditch of the present invention is simple, while to construction equipment requirement also letter relatively Single, easy for installation, unfailing performance is high, and construction safety, short time limit, economic benefit is fairly obvious.
Brief description of the drawings
Fig. 1 is the construction process figure of slope retaining drainage ditch of the present invention;
Fig. 2 is the U-shaped canal structural section after the completion of present invention construction.
In figure, 1- substrates element soil, 2- cushion limes, 3- composite earthwork cloths, 4-U type canals.
Specific embodiment
The present invention is described in detail below in conjunction with the accompanying drawings.
As shown in figure 1, the construction method of slope retaining drainage ditch of the present invention is comprised the following steps:
1st, positioning measurement
2 control points of horizontal control point and bench mark pilot measurement provided according to scene and 2 datum marks are used as construction stake position center And the testing foundation of absolute altitude, the U-shaped canal center line of measuring.
2nd, foundation trench is excavated
After surveying setting-out, smooth U-shaped canal surface is cleared up, with mini-excavator or special ditcher, foundation trench is carried out according to center line Excavate, cutting depth is defined by U-shaped canal canal bottom absolute altitude, and mechanical equivalent of light excavation depth is preferably 700-750mm, it is impossible to backbreak, and bottom is auxiliary Manually to carry out clear soil.Survey crew's elevation control at any time during foundation trench is excavated simultaneously, it is ensured that canal bottom absolute altitude has to reach and sets Count desired ratio of slope.
3rd, lime-soil cushion
Foundation trench is excavated and completed, and carries out lime-soil cushion construction, and dust foundation is intended to increase anti-permeability performance, and in Collapsible Loess District Eliminate substrate settlement by soaking.
(1)It is before grey earthen backfill that bottom land garbage-cleaning is clean, and rammer pressure should be filled out through testing paving, determine every layer of virtual resurfacing thickness, The final every layer of virtual resurfacing thickness for determining is 30mm.
(2)Former material quality is identified by design or corresponding code requirement, strictly by 2:8 match ratio mixing dirt(That is drying Clay and lime), mixed and stirred using machinery, it is desirable to reach uniform, solid colour, and by the required moisture content of compaction test report To control water content, scene is agglomerating to hold, and two fingers are gently pinched to dissipate and are advisable, if overly moist, should be dried, if overdrying, should be sprinkled water, and are kept Untill optimum moisture content.Dirt will with mix with.
(3)Ramming machine should be used by the virtual resurfacing thickness compaction in layers for determining, compacting during grey earthen backfill, pressure is rammed repeatedly, edge is used Vertical ramming machine is mended and rams closely knit, is sampled through cutting ring after compacting and detected(Every 100 ㎡ selective examination is no less than a point), meet the requirements(It is dry Density is not less than 1.6g/cm3 , compacting factor is not less than 0.93)Afterwards, can subsequent construction.
(4)Cushion lime 2 is constructed preferably with whole section, if during section construction, bilevel seam distance cannot be less than 50 ㎝, Seam crossing should make mark time raft or slope raft and rammer densification reality.
(5)Dirt should spread and fill out compacting day, must not the next day pound.Dirt surface after compacting should make interim covering, it is to avoid Expose to the sun and rain, during rainy season construction, rain-proof or drainage measure should be taken, must not be soaked by water in 30h.If drench with rain or soak should be by pine Weak soil is excavated and is reformed.
4th, laying composite earthwork cloth, granular cushion
(1)After the completion of lime-soil cushion, carry out composite earthwork cloth 3 and lay.Composite earthwork cloth is using artificial laying, the composite earth of selection Work cloth requirement presentation quality:No-sundries, without repairing point, mass area ratio >=300Kg, fracture strength >=3.0KN/M, CBR top Broken strength >=1.0KN, tearing brute force >=0.32.Selected during laying in the calm or wind-force less time.First by composite earthwork cloth It is placed on the axis of canal by longitudinal direction, is launched to both sides since one end, the width that composite earthwork cloth extends to U-shaped canal both sides No less than 500mm.
(2)For high and cold freezing and defrosting area after the completion of composite earthwork cloth laying, about 100mm thickness graded broken stones are laid at canal bottom Bed course, the behave is to prevent in high and cold freezing and defrosting area because frost heave causes canal to ftracture.Blotter clay content is no more than 3%, rubble Maximum particle diameter cannot be greater than the 2/3 of cushion thickness, and not be preferably greater than 50mm, and priority is with being:Particle diameter not surpassing less than 31.5mm Cross 90%, particle diameter less than 16mm no more than 15%, particle diameter less than 10mm no more than 5%.
5th, clay model construction
After the completion of blotter construction, clay model construction is carried out, by dragging prefabricated steel mold, backfilling of earthwork is carried out to both sides Vibration compacting, forms U-shaped clay model, strict control Qu Ding, bottom absolute altitude, canal both sides soil compactness in clay model construction(Plain soil pressure reality system Number is not less than 0.93)Reach the requirement of design(Soil for being backfilling and compacted clay model should be preferential using the foundation soil for excavating out, soil Should be uniform, the water content for not having the debris such as rubble, grass roots, soil should be controlled between 16~20, and backfill is relatively dry, should use The method of watering adjusts the water content of backfill, if water content is larger, should be using methods such as draining, drying, soil removal and replacement, by water content Control is in allowed limits).The The concrete specification of clay model is:When under the high and cold weather conditions in northwest(Such as mean annual precipitation In the range of 180~350mm, domatic area is in 12000-20000m2In the range of)When, clay model bottom arc radius are 350- 400mm, radian is 145-152 °, and top width is in the range of 900-950mm;When in the high and cold weather conditions in northwest(As year puts down , less than 180mm, domatic area is in 8000-12000m for equal precipitation2In the range of)When, clay model bottom arc radius are 300- 350mm, radian is 135-145 °, and top width is in 850-900mm scopes.Through management acceptance(check) rear after clay model construction completion Next step construction can be carried out.
6th, U-shaped canal lining concrete construction
The lining concrete of U-shaped canal 4 is used and stirs mode certainly.Confirmation need to be audited to material and mixing ratio.
6.1st, raw material selection
(1)Cement:The selection of cement is selected according to its use environment, usually using P.O.42.5 Portland cements.
(2)Sand:High-quality medium coarse sand should be selected.
(3)Stone:High-quality particle diameter 1-2cm stones should be selected.
(4)Water:Ready-mixed concrete water its water quality preferably reaches drinking water standard.
6.2nd, the determination of concrete mix
U-shaped canal 4 is C30 using concrete grade, after concrete needs the cement for from mixing, being used, sand, stone to march into the arena, send experiment Room carries out above-mentioned concrete mix proportion experiment, is used after obtaining match ratio.It is required that water-binder ratio:0.36, sand coarse aggregate ratio:38%.It is excellent The weight proportion is selected to be:42.5 grade composite silicate cement:Sand:Cobble(0.5-2cm):Cobble(2-4cm):Drinking water=1:1.81: 1.32:1.62:0.46。
6.3rd, concrete-agitating
(1)The concrete-agitating error in dipping that feeds intake should meet the following requirements:The coarse aggregate error such as sandstone is not more than 3%;Cement and water Error be not more than 2%.
(2)The shortest time of ready-mixed concrete is no less than 120s, and strictly controls the ratio of mud, must during each ready-mixed concrete The moisture content of sand must be determined, each consumption of mixer is calculated, accurately fed intake.
(3)When the concrete that is stirred discharges, its slump should be determined, observe its cohesiveness, workability, the full property such as aqueous Shape, to meet the requirement of concreting.
6.4th, concrete construction and maintenance
(1)Concrete construction is carried out using coffering machine:During U-shaped canal concrete construction, concrete is manually delivered into feeding port, Coffering machine drives steel wire rope to rotate, so as to drive coffering machine along U by vibrator vibratory compaction concrete by from draw-gear Type canal center line is moved forward.
(2)It is 1.5-1.58KN/m in natural density3General collapsible loess in, concrete slump control be preferably 12-14cm, U-shaped trench wall camber angle is controlled to 10-14 °(The bottom of U-shaped canal is semicircle or arc, and upper end both sides are edge The straightway that bottom semicircular or arc two ends tangential direction extend, straightway is camber angle with the angle of vertical direction).
(3)The mechanically-propelled speed of front end draw-gear should be set, it is ensured that concrete vibrating is closely knit, in U-shaped canal 4 during construction Surface
Wipe one's face press polish, it is ensured that irrigation canals and ditches inner wall smooth.
(4)After the completion of U-shaped canal lining construction, timely plastic covering film is protected, it is to avoid excessive water evaporates.Construction Complete to carry out water seasoning in 8-12 hours, the later stage persistently conserves 14 days.
7th, prepare before hardening and hardening model sheetinstallat
After U-shaped canal lining concrete reaches some strength, maturing preparative work before construction is carried out:Extension top Covering 100mm thickness 2:8 dirt, compacting factor is not less than 0.93.Then according to the hardening sideline discharged, with the wood of 150 × 150mm Square supporting and retaining system, used as the side mould of hardening, flitch supporting and retaining system is firm, and outside should support, and prevent flitch from shifting, it is ensured that the size of hardening Meet design requirement.
8th, maturing is poured and conserved
8.1st, maturing is poured
(1)In maturing(Using U-shaped canal construction concrete in step 6)Must not for moistening the mortar of pipe before formal pumping Concentrate heap at one, uniformly should spread out in substrate.
(2)To be spread out with spade in time when concrete pump is sent to construction surface, thickness is slightly above levelling thickness, immediately with insertion Formula vibrator coordinates and vibrates, and maturing thinner thickness is parallel in the concrete shakeout with poker vibrator Ying Yi to drag It is dynamic, move line by line, sequentially carry out, must not omit, accomplish vibration compacting.
(3)The concrete surface that the feed opening distance of concrete is poured highly must not exceed 2m, and using pumping, commodity are mixed Solidifying soil slump control is in 14-16cm.
(4)Subregion apart from feed opening farther out when can do horizontal transport with small handcart.
(5)It is 12cm to control stake grafter that concrete is substantially paved thickness according to level.
(6)Vibration compacting after spreading concrete, is struck off with 2m darbys long, after the surface place of collapsing is paved, then scrapes one with darby long It is secondary, then rub flat with the hands with wooden float.
(7)Magma is carried out with plasterer's trowel and receives light.
8.2nd, the maintenance of maturing
(1)People can be gone up when the intensity of concrete reaches 1.2Mpa carries out next process operation, is controlled in Specific construction 8-12 hours after concreting, concrete has solidified and has been hardened, and is defined without vestige after upper people.
(2)Water seasoning is carried out after 12 hours in concreting, to be carried out maintenance at any time later and be kept at concrete In moisture state.Until 14 days after concreting.
8.3rd, construction joint construction
(1)Construction joint construction can be separated out construction joint with batten in casting concrete on concrete(Construction joint spacing is 3- 5m), batten is removed after concrete initial set.
(2)Construction joint can also be carried out with cutting machine unifying cutting during concrete curing.
(3)Pitch or plug flax pitch are poured in construction joint.
9th, the indwelling of concrete test block and experiment
(1)Often pour once with the sampling of match ratio concrete once, leave and take standard curing in 28 days, cured under same condition resistance to compression test block each One group.
(2)Often poured once and no more than 100m according to specification and design requirement concrete3One is sampled with match ratio concrete It is secondary, leave and take one group of compression strength test block in 28 days.
(3)To conserving overdue various test blocks, laboratory test should be in time sent by age and test report is taken out on time and returned Enter archives.
(4)The concrete performance parameter obtained through experiment is as follows:Intensity C30, slump 14-16cm, water-cement ratio is not less than 0.36. sand coarse aggregate ratio is not less than 38%.
10th, finished product protection
(1)Concreting is complete, when concrete does not solidify completely, forbids upper people to carry out other operation constructions.
(2)Because after maturing construction just without other working procedures, it should be noted that other heavy vehicles of scene are rolled.
Slope retaining drainage ditch construction is carried out in Yining area in April, 2012 in September, 2013 using the inventive method, Build U-shaped drainage ditch D60(Specifically specification is:152 ° of bottom circular arc radian, arc radius 300mm, width 718mm suitable for reading is wet Week 1.357)
Flow section according to cast-in-place U-shaped channel is calculated by the Chezy formula that specification is recommended:
Q=υA (1)
(2)
In formula, Q is the drain discharge of ditch;υ is mean flow rate in ditch;A is discharge section area;R is hydraulic radius;I is waterpower The gradient;N is roughness.Under the conditions of identical flow section and hydraulic gradient, if overflowing end face is 0.27m2, hydraulic gradient 0.01, all kinds of escape canal flows are shown in Table 1.
The all types of escape canal flow summary sheets of table 1
By upper table it can be seen that cast-in-place U-shaped canal is under the identical cross-section of river and hydraulic gradient, its discharge capacity is maximum.According to work Journey cost is adjusted, its various irrigation canals and ditches economic benefits comparisons such as table 2.
The all types of gutter economic benefits comparisons of table 2
Irrigation canals and ditches type Type Comprehensive unit price/(Unit/m) Work efficiency/(m/d)
Cast-in-place U-shaped canal It is man-machine About 300 6.0
Reinforced concrete rectangular canal Manually About 750 2.5
The trapezoidal gutter of mortar flag stone Manually About 350 3.5
By above com-parison and analysis, in the case where identical manually puts into, the U-shaped canal construction efficiency that the present invention is used is about reinforced concrete 2 times of native or mortar flag stone gutter;With respect to armored concrete gutter, its cost-effective nearly 60%.
And construct to 2 months 2017 in September, 2013.Have passed through 5 tests in winter, live U-shaped canal is cracking, Deformation, without avalanche destruction etc. phenomenon, without potential safety hazard.Construction quality meets design requirement.

Claims (7)

1. a kind of construction method of slope retaining drainage ditch, it is characterised in that comprise the following steps:
(1)Positioning measurement:At side slope toe, positioning measurement, measuring drainage ditch center line;
(2)Foundation trench is excavated:Foundation trench excavation is carried out using mini-excavator;
(3)Lime-soil cushion:Grey earthen backfill is carried out in foundation trench;
(4)Laying composite earthwork cloth:Longitudinal direction extends laying composite earthwork cloth along drainage ditch center line to both sides;
(5)Laying blotter:Blotter is laid above the composite earthwork cloth of foundation trench bottom;
(6)Clay model is constructed:Clay model construction is carried out in foundation trench, U-shaped clay model is formed;
(7)U-shaped canal construction:Using coffering machine, concrete construction is carried out, the U-shaped canal of lining cutting in foundation trench, above U-shaped clay model is supported Shield;
(8)Repair U-shaped trench side:Maturing is poured, maintenance;
(9)Construction joint is constructed.
2. construction method according to claim 1, it is characterised in that the step(2)The depth that middle foundation trench is excavated is 700-750mm;When mean annual precipitation is 180~350mm, domatic area is 12000-20000m2When, the step(6)In Clay model specification is:Bottom arc radius are 350-400mm, and radian is 145-152 °, and top width is 900-950mm;Put down then Equal precipitation is less than 180mm, and domatic area is 8000-12000m2When, the step(6)Middle clay model specification is:Bottom arc half Footpath is 300-350mm, and radian is 135-145 °, and top width is 850-900mm;The step(7)In the bottom of U-shaped canal be half Circular or arc, upper end both sides are the straightway extended along bottom semicircular or arc two ends tangential direction;The straightway with The angle of vertical direction is 0-16 °;The wall thickness of the U-shaped canal is 100mm.
3. construction method according to claim 2, it is characterised in that U-shaped 152 ° of the canal bottom circular arc radian, circular arc half Footpath 300mm, width 718mm suitable for reading, wetted perimeter 1.357.
4. the construction method according to Claims 2 or 3, it is characterised in that the step(3)Middle dirt proportioning is 2:8.
5. the construction method according to Claims 2 or 3, it is characterised in that the step(5)The thickness of medium stone bed course is 100mm, the macadam gradating for using for:Particle diameter less than 31.5mm no more than 90%, particle diameter less than 16mm no more than 15%, particle diameter Less than 10mm no more than 5%.
6. the construction method according to Claims 2 or 3, it is characterised in that the step(7)And step(8)Middle use Concrete is prepared from by the raw material of following weight proportion:42.5 grade composite silicate cement:Sand:Particle size is 0.5-2cm Cobble:Particle size is the cobble of 2-4cm:Water=1:1.81:1.32:1.62:0.46.
7. the construction method according to Claims 2 or 3, it is characterised in that the step(9)Middle construction joint work progress For:In step(7)And step(8)Construction joint is separated out on concrete with batten during casting concrete, or in step(7)And step (8)Carry out unifying cutting during maintenance after concrete construction;Then pitch or filling flax pitch are poured in construction joint.
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CN109837966A (en) * 2019-03-06 2019-06-04 中国十七冶集团有限公司 The structure and construction method of cushion processing trunk canal side slope foundation pit side-wall water-stop curtain
CN110241720A (en) * 2019-06-28 2019-09-17 沈炜 Blowdown anti-clogging bridge
CN114134980A (en) * 2021-10-13 2022-03-04 宁夏兴昊永胜盐业科技有限公司 Preparation method of trench with seepage-proofing function
CN114808856A (en) * 2022-05-18 2022-07-29 中交水利水电建设有限公司 Construction method for curve of traction type channel forming machine
CN114922138A (en) * 2022-05-20 2022-08-19 四川省水利电力工程局有限公司 Small-section thin-wall U-shaped open channel concrete lining device and construction method thereof

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CN109837966B (en) * 2019-03-06 2020-10-30 中国十七冶集团有限公司 Structure for treating lateral wall waterproof curtain of foundation pit on main channel side slope by replacement and filling method and construction method
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CN110241720B (en) * 2019-06-28 2021-08-24 苏交科集团股份有限公司 Pollution discharge anti-blocking bridge
CN114134980A (en) * 2021-10-13 2022-03-04 宁夏兴昊永胜盐业科技有限公司 Preparation method of trench with seepage-proofing function
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CN114808856B (en) * 2022-05-18 2024-01-19 中交水利水电建设有限公司 Bend construction method of traction type channel forming machine
CN114922138A (en) * 2022-05-20 2022-08-19 四川省水利电力工程局有限公司 Small-section thin-wall U-shaped open channel concrete lining device and construction method thereof
CN114922138B (en) * 2022-05-20 2024-01-26 四川水发建设有限公司 Concrete lining device for small-section thin-wall U-shaped open channel and construction method thereof

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