CN213014164U - High-ductility concrete canal lining - Google Patents

Abstract

The utility model discloses a high-ductility concrete canal lining, including the soil body, set up the canal on the soil body, be provided with the second heat preservation on the wall of canal both sides, be provided with first water absorption layer in the second heat preservation, high-ductility concrete layer has been filled on the upper surface of second heat preservation, the drain has been seted up to the bottom of canal, the bottom of second heat preservation can be dismantled and be connected with water guide canal one end, the other end of water guide canal inserts in the high-ductility concrete layer on the drain, the bottom of drain extends to outside the soil body, water guide canal slope setting; the utility model discloses a lining cutting of high ductile concrete channel lining cutting not only adopts the better high ductile concrete of performance to replace the lining cutting that present conventional concrete is used for the channel, still is provided with the heat preservation and absorbs water the layer between the soil body and high ductile concrete layer, and the staff just can know the very first time like this and probably the lining cutting takes place the large tracts of land and collapses, alright in time handle, prevents water resource loss.

Description

High-ductility concrete canal lining

Technical Field

The utility model relates to a hydraulic engineering's channel lining technical field especially relates to a high ductile concrete channel lining.

Background

The channel is an artificial river which is a water delivery channel for taking water from a water source and delivering the water to an irrigation area or a water supply and distribution point. The water delivery system is a main water delivery mode for irrigation areas or long-distance water transfer projects due to the advantages of low cost, high water delivery efficiency, simple construction, easy management and the like. After a new Chinese is established, the construction of large irrigation areas and long-distance water transfer projects in the north of China are greatly developed, and as the years end of 2019, the irrigation area of the irrigation areas in China reaches 11.1 hundred million acres, the number of the irrigation areas over ten thousand acres reaches 7800, and the total length of a dry branch channel exceeds 80 km; the water regulating engineering of east, middle and west lines of south-to-north water regulation is hooked with four rivers such as Yangtze river, yellow river, Huai river, sea river and the like to form a large water network of 'three longitudinal four transverse, south-to-north water regulation and east-west mutual assistance' in China, wherein the main engineering of the middle east and middle lines in one period is smoothly communicated with water for 5 years, and the accumulated water regulating amount reaches 299.5 hundred million m³And/s, the total length of channels of various water transfer projects exceeds 20 km, and a main artery for reasonably allocating water resources is formed. The capillary vessels for water resource distribution are formed by various bucket, agricultural and capillary canals, water distribution pipe networks and the like which extend on the basis, and the formed blood vessel network not only constructs a life line for economic social development and waters the economic life line and the national life line of Chinese nationality, but also lays a solid foundation for great revival of Chinese nationality and economic social development of construction of ecological civilization of China, rapid development of industrial and agricultural production and the like.

Research shows that the rigid lining seepage-proofing can reduce water transmission loss by 60-80% compared with a canal without seepage-proofing lining, and can improve water transmission efficiency to a great extent, but in cold regions in cold northern dry regions in China, water in canal foundation soil migrates, gathers and freezes to freezing fronts under the action of negative temperature gradient in winter to generate volume expansion, the frost expansion can be restrained by concrete lining plates and unfrozen soil to generate acting force, when the acting force is larger, common concrete lining plates can generate cracks and cracks, the integral structure of the canal lining can be damaged in severe cases, and the main manifestation of the method is the phenomena of cracks, bulging, collapse and the like of the lining plates. For example, the frozen soil area in northern China occupies 53.5 percent of the area of the whole country, and a plurality of irrigation areas with the volume of more than 5 million hectares and major water diversion and regulation projects are distributed. Due to the coupled circulation action of leakage of the canal and freeze thawing, frost heaving damage of a large number of lining channels is common and serious, bulging and uplifting are shown, damage forms such as tilting, overhead or unstable collapse occur in serious conditions, and the like, and the method becomes a primary problem for restricting the construction of channels in drought and cold regions. According to statistics, more than 83% of the engineering number of canal systems above branch channels of a large irrigation area in Heilongjiang province has frost heaving damage of different degrees, the ratio of the frost heaving damage engineering number of the large irrigation area in Jilin province to the engineering number of the frost heaving damage engineering number of 39.4%, more than half of dry and branch channels of northern Xinjiang province and more than 50% -60% of irrigation areas in Qinghai over ten thousand mu, and serious freezing damage problems also exist in inner Mongolia, Ningxia, Shanxi Guanzhong, Gansu and the like, and great challenges are brought to the safe operation of the channels.

The damage phenomenon seriously reduces the seepage-proofing capacity of the channel, causes the water resource which is originally scarce to be seriously wasted, also seriously influences the water delivery efficiency of the channel, also needs a large amount of manpower, material resources and financial resources to repair or rebuild the channel, and simultaneously, the current lining is perceived by workers when the lining is greatly expanded and collapsed, thereby not only increasing the maintenance difficulty, but also leading to a large amount of water resource loss because the above accidents are not discovered in time, therefore, a high-ductility concrete channel lining is urgently needed at present, which not only adopts high-ductility concrete with better performance to replace the current conventional concrete for lining the channel, but also belongs to a special high-performance fiber reinforced cement-based composite material, and is originally proposed by the teaching of Victor.C.Li of the university of Michigan in the 20 th century in the 90 s. The cement-based material is composed of raw materials such as a cementing material, aggregate, an additive, synthetic fibers and the like, and interaction of fibers, a matrix and an interface of the fibers and the matrix in the cement-based material is improved based on a micro-mechanical principle. The high-ductility concrete is characterized in that cement, sand, mineral admixture and the like form a matrix, short fibers distributed in a random direction are used as toughening materials, the ultimate tensile strain can stably reach more than 3% under the condition that the fiber mixing amount is about 2%, the high-ductility concrete has high ductility under the action of tensile action and shear load, shows obvious strain hardening and multi-crack cracking characteristics, has high energy absorption capacity, and the width of a saturated multi-crack is mostly smaller than 100 mu m. Compared with common concrete, steel fiber concrete and high-performance concrete, the concrete has greatly improved strength, toughness, durability, fatigue resistance and the like. Simultaneously has the following properties: the environment-friendly material has good environmental protection value, for example, when concrete is mixed, the fly ash can be used for replacing cement, wastes are utilized, and the use of the cement is reduced: the self-healing capacity is good, and the durability of the concrete can be improved: the fiber has good fire resistance, and the fiber can be dissolved at high temperature, so that a water vapor migration channel is formed, the vapor pressure in the member is released, and the decomposition and the damage of a cement matrix are avoided; as well as some other properties; the water guide structure is arranged at the bottom end of the heat preservation layer, so that the problems existing in water delivery of channels in cold regions in the dry regions at present can be well solved, water can be completely absorbed without maintenance if the high-ductility concrete layer has slight cracks, the soil body is prevented from collapsing due to serious seepage, channels collapse is prevented, if serious seepage occurs, water flows can flow out of the soil body along the flow guide channels and the drainage channels, and workers can know that large-area collapse of the lining possibly occurs at the first time, so that the water guide structure can be timely treated, and water resource loss is prevented; the technical scheme has important significance for solving the lining problem of the water delivery channel in the cold region of China and even the arid region in the world.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a high ductility concrete canal lining to solve the problem that above-mentioned prior art exists.

In order to achieve the above object, the utility model provides a following scheme: the utility model provides a high-ductility concrete channel lining, which comprises a soil body and a channel arranged on the soil body, the two side walls of the channel are provided with second heat-insulating layers which are of cavity structures, a first water absorption layer is arranged in each second heat-insulating layer, a high-ductility concrete layer is filled on the upper surface of the second heat-insulating layer, a water drainage channel is arranged at the bottom of the channel, the drainage channel comprises a first heat preservation layer arranged on the soil body, a second water absorption layer arranged above the first heat preservation layer and a high-ductility concrete layer arranged above the second water absorption layer, the bottom of second heat preservation can be dismantled and be connected with water guide channel one end, the other end of water guide channel inserts in the high ductility concrete layer on the drain, the bottom of drain extends to outside the soil body, the slope of water guide channel sets up.

Preferably, the first heat-insulating layer and the second heat-insulating layer are heat-insulating plates made of heat-insulating materials.

Preferably, the water guide channel is a high-ductility concrete water guide channel formed by filling high-ductility concrete, and a third water absorption layer is arranged between the water guide channel and the soil body.

Preferably, the first water absorption layer, the second water absorption layer and the third water absorption layer are composed of multiple layers of water absorption quick-drying non-woven fabrics.

Preferably, the upper surface of the soil body is fixedly connected with a mounting net, and the second heat-insulating layer is fixedly connected to the mounting net.

Preferably, the thickness of the high-ductility concrete layer is 2-5 cm.

Preferably, the channels are of a trapezoidal structure.

Preferably, the drainage channel and the water guide channel are of a semicircular structure or an arc-shaped structure.

The utility model discloses a following technological effect: the utility model discloses a lining of high-ductility concrete channel, which not only adopts high-ductility concrete with better performance to replace the prior conventional concrete for lining the channel, but also arranges a heat preservation layer and a water absorption layer between the soil body and the high-ductility concrete layer, meanwhile, the bottom end of the heat-insulating layer is provided with a water guide structure, so that the problem existing in the water delivery of the channel in the cold region of the arid region at present can be well solved, and when the high-ductility concrete layer has slight cracks and does not need to be repaired, the water can be completely absorbed to prevent the soil from collapsing due to serious seepage so as to prevent the channel from collapsing, if serious water seepage occurs, the water flow can flow out of the soil body along the flow guide channel and the drainage channel, therefore, the working personnel can know that the lining can be collapsed in a large area in the first time, and can treat the lining in time to prevent water resource loss; the technical scheme has important significance for solving the lining problem of the water delivery channel in the cold region of China and even the arid region in the world.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without inventive labor.

FIG. 1 is a cross-sectional view of a lining of a medium and high ductility concrete channel of the present invention;

fig. 2 is a left side view of the water guide channel of the present invention;

wherein 1-soil body; 2-channel; 3-a drainage channel; 4-a first insulating layer; 5-a second insulating layer; 6-first water absorption layer; 7-high-ductility concrete layer; 8-a water guide channel; 9-a second water-absorbent layer; 10-a third water-absorbent layer; 11-installing the net.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In order to make the above objects, features and advantages of the present invention more comprehensible, the present invention is described in detail with reference to the accompanying drawings and the detailed description.

Referring to fig. 1-2, the utility model provides a high-ductility concrete channel lining, which comprises a soil body 1 and a channel 2 arranged on the soil body 1, wherein the channel 2 is in a trapezoidal structure; namely, the cross section of the channel 2 is in a trapezoidal structure; the two side walls of the channel 2 are provided with second heat-insulating layers 5, the second heat-insulating layers 5 are arranged into cavity structures, in order to avoid that when a high-ductility concrete layer 7 on the channel 2 is frozen and swelled, water in the channel 2 seeps downwards to cause soil 1 to loosen, the second heat-insulating layers 5 are provided with a plurality of water guide holes (not shown in the figure), so that when water seepage occurs, the first water absorption layer 6 can absorb the leaked water at the first time; a first water absorption layer 6 is arranged in the second heat insulation layer 5, a high-ductility concrete layer 7 is filled on the upper surface of the second heat insulation layer 5, a water drainage channel 3 is arranged at the bottom of the channel 2, the water drainage channel 3 comprises a first heat insulation layer 4 arranged on the soil body 1, a second water absorption layer 9 arranged above the first heat insulation layer 4 and the high-ductility concrete layer 7 arranged above the second water absorption layer 9, one end of a water guide channel 8 is detachably connected to the bottom end of the second heat insulation layer 5, the other end of the water guide channel 8 is inserted into the high-ductility concrete layer 7 on the water drainage channel 3, the bottom end of the water drainage channel 3 extends out of the soil body 1, and the water guide channel 8 is obliquely arranged to form a certain angle with the horizontal soil body 1 so as to enable water flow to be faster; when the high-ductility concrete layer 7 is seriously broken or collapsed, the water flow in the lining of the channel 2 is seriously lost, so that when the first water absorption layer 6 cannot absorb all the leaked water, the leaked water flows to the water guide channel 8 along the inside of the second heat insulation layer 5, and then the water flow flows to the water drainage channel 3 along the water guide channel 8 until the leaked water flows out of the soil body 1, so that workers can know that the lining of the channel 2 is seriously cracked or collapsed, and defense work can be performed at the first time so as to prevent a large amount of water flow from being lost; the first heat preservation layer 4 and the second water absorption layer 9 are used for preventing the drainage channel 3 from collapsing, and the third water absorption layer 10 can absorb water flow in the water guide channel 8, so that the soil body 1 can be prevented from collapsing.

Further optimization scheme, in order to prevent frost heaving from appearing in high-ductility concrete layer 7, will first heat preservation 4 and second heat preservation 5 set up the heated board that the insulation material made, like this when 2 linings in severe cold winter in high-ductility concrete channel, because the heated board can carry out the save of temperature, can prevent like this that frost heaving from appearing in high-ductility concrete layer 7 under severe cold.

In order to further optimize the scheme, in order to improve the frost resistance and crack resistance of the water guide channel 8 in the technical scheme, the water guide channel 8 is a high-ductility concrete water guide channel 8 formed by filling high-ductility concrete, and a third water absorption layer 10 is arranged between the water guide channel 8 and the soil body 1; simultaneously, in order to prevent that frost heaving from appearing in high ductility concrete layer 7, water can permeate to in the soil body 1, and then lead to collapsing, absorb water layer 6 with first water absorption layer, the second absorbs water layer 9 and the third and absorbs water layer 10 sets up to the structure of constituteing by the multilayer quick-drying non-woven fabrics that absorbs water, when water is by first heat preservation 4, second heat preservation 5 and water guide channel 8 seepage to the soil body 1 in like this, can in time absorb with the layer that absorbs water, simultaneously, when absorbing water quick-drying non-woven fabrics by the multilayer and constituteing and can guarantee that rivers are absorbed as early as possible and dry up.

In order to prevent the soil body 1 from loosening, the installation net 11 is fixedly connected to the upper surface of the soil body 1, the second heat-insulating layer 5 is fixedly connected to the installation net 11, and the second heat-insulating layer 5 can be fixedly connected to the installation net 11 in a screw fixedly connecting mode.

The concrete construction process comprises the following steps:

1) channel 2 lofting: setting a central control line of the channel 2 by using a total station, and lofting out a bottom line and a canal opening line of the channel 2 according to the central control line;

2) once earthwork tamping: the backfill and tamping of the channel 2 are carried out layer by adopting a layered tamping method, each layer of paved soil is uniformly and flatly paved, the water content of the soil is strictly controlled, the tamping times of each layer are not less than 4 times, and the phenomena of missing tamping and the like which do not meet the quality requirement are avoided; then, trimming the channel slope to ensure that the requirement is met;

3) excavating a water drainage channel 3 and a water guide channel 8: excavating the water guide channel 8 according to the position of the second insulating layer 5, then tamping earthwork in the step 2 again, and finishing the excavation of the water guide channel 8; then, a third water absorption layer 10 is arranged on the water guide channel 8, and finally high-ductility concrete is poured on the third water absorption layer 10 to form a high-ductility concrete layer 7; excavating a drainage channel 3 at the tail end of a water guide channel 8, and then sequentially installing a first heat preservation layer 4 and pouring high-ductility concrete to form a high-ductility concrete layer 7; because the heat-insulating layer is not arranged, a placing frame (not shown in the figure) is arranged outside the third water absorption layer 10;

4) secondary earthwork tamping: the drainage channel 3 and the water guide channel 8 are respectively and fixedly connected with a supporting structure, then soil bodies 1 are used for burying, when earthwork tamping is carried out, soil is paved layer by layer, each layer of soil is paved evenly and smoothly, the water content of the soil is strictly controlled, the tamping pass of each layer is not less than 4 times, and phenomena such as missing tamping and the like which do not meet quality requirements are avoided; then, trimming the channel slope to ensure that the requirement is met;

5) installing the installation net 11 and the second heat-insulating layer 5: fixedly connecting the mounting net 11 with the size matched with that in the step 2 in the channel 2 tamped in the step 2, and then fixedly connecting the second heat-insulating layer 5 on the mounting net 11;

6) pouring construction: the early-stage work of pouring construction is well done, the pouring formwork project needs standard operation, the erection is firm, the plate seam is tight, the surface is smooth, and the like. When pouring, high-ductility concrete is directly poured on the second heat-insulating layers 5 by adopting a canal 2 lining device from the bottom of the canal 2 slope, and finally, the pressure edges are poured; when vibrating, the vibration is carried out in one direction from bottom to top, over vibration and leakage vibration are strictly avoided, the time for removing the mould is proper to avoid damaging the finished concrete, then water is sprayed in time, plastic films are used for covering and curing, and earth ridges are used for sealing, and the curing days are not less than 14 days.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description of the present invention, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention.

The above-mentioned embodiments are only intended to describe the preferred embodiments of the present invention, but not to limit the scope of the present invention, and those skilled in the art should also be able to make various modifications and improvements to the technical solution of the present invention without departing from the spirit of the present invention, and all such modifications and improvements are intended to fall within the scope of the present invention as defined in the appended claims.

Claims (8)

1. The utility model provides a high ductility concrete channel lining, includes soil body (1), sets up channel (2) on soil body (1), its characterized in that: the water drainage structure is characterized in that second heat-insulating layers (5) are arranged on two side walls of the channel (2), the second heat-insulating layers (5) are of a cavity structure, first water absorption layers (6) are arranged in the second heat-insulating layers (5), high-ductility concrete layers (7) are filled on the upper surfaces of the second heat-insulating layers (5), water drainage channels (3) are formed in the bottoms of the channel (2), each water drainage channel (3) comprises a first heat-insulating layer (4) arranged on the soil body (1), a second water absorption layer (9) arranged above the first heat-insulating layer (4) and the high-ductility concrete layers (7) arranged above the second water absorption layers (9), one ends of water guide channels (8) are detachably connected to the bottom ends of the second heat-insulating layers (5), the other ends of the water guide channels (8) are inserted into the high-ductility concrete layers (7) on the water drainage channels (3), the bottom of the drainage channel (3) extends to the outside of the soil body (1), and the water guide channel (8) is obliquely arranged.

2. The high ductility concrete canal lining as claimed in claim 1, wherein: the first heat-insulating layer (4) and the second heat-insulating layer (5) are heat-insulating plates made of heat-insulating materials.

3. The high ductility concrete canal lining as claimed in claim 1, wherein: the water guide channel (8) is a high-ductility concrete water guide channel (8) formed by filling high-ductility concrete, and a third water absorption layer (10) is arranged between the water guide channel (8) and the soil body (1).

4. The high ductility concrete canal lining as claimed in claim 3, wherein: the first water absorption layer (6), the second water absorption layer (9) and the third water absorption layer (10) are composed of a plurality of layers of water absorption quick-drying non-woven fabrics.

5. The high ductility concrete canal lining as claimed in claim 1, wherein: the soil body (1) is fixedly connected with an installation net (11) on the upper surface, and the second heat preservation layer (5) is fixedly connected to the installation net (11).

6. The high ductility concrete canal lining as claimed in claim 1, wherein: the thickness of the high-ductility concrete layer (7) is 2-5 cm.

7. The high ductility concrete canal lining as claimed in claim 1, wherein: the channel (2) is of a trapezoidal structure.

8. The high ductility concrete canal lining as claimed in claim 1, wherein: the drainage channel (3) and the water guide channel (8) are of semicircular structures or circular arc structures.

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