CN104164992A - Water storage adjustment system formed by distributive junked tire prestress steel structure - Google Patents
Water storage adjustment system formed by distributive junked tire prestress steel structure Download PDFInfo
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- CN104164992A CN104164992A CN201410352317.1A CN201410352317A CN104164992A CN 104164992 A CN104164992 A CN 104164992A CN 201410352317 A CN201410352317 A CN 201410352317A CN 104164992 A CN104164992 A CN 104164992A
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Abstract
The invention discloses a water storage adjustment system formed by a distributive junked tire prestress steel structure. The water storage adjustment system comprises an upper junked tire prestress reservoir and a lower junked tire prestress reservoir, the upper junked tire prestress reservoir and the lower junked tire prestress reservoir are not at the same height, the side wall of each reservoir is of annular structures formed by the junked tires in a surrounding mode and is prestressed, prestress strength of inner ring steel strands is higher than that of outer ring steel strands, filling layers are arranged in the junked tires, the surfaces of the junked tires keep smooth to serve as waterproof layers, and a silt outlet, a door, a water inlet pipe and a water outlet pipe are arranged. By means of the advantages of elastic supporting and long service life of the junked tires, the junked tire prestress reservoirs are mutually communicated, water levels are detected through processors, flow changes of the water storage amount are controlled, the water levels can be automatically controlled and maintained, and the aims of automatically storing water and saving water are achieved. Sedimentary silt of the junked tire prestress reservoirs facilitates soil conservation and the effects that water and soil loss is prevented and soil can be solidified through plants are achieved.
Description
Technical field
The present invention relates to Techniques of Waste Tyres Recycling and Utilization field, be specifically related to a kind of distributed junked tire prestress steel structure water storage regulating system of utilizing junked tire entire combination to form.
Background technology
Along with the develop rapidly of Domestic Automotive Industry, the quantity of junked tire is constantly soaring, and the annual junked tire producing of China is with 8% to 10% speed increase.Within 2007, approximately there are 1.6 hundred million junked tires in China, and 2010, Chinese junked tire generation approximately reached 2.5 hundred million, and recovery utilization rate is only 50% left and right, less than 30% of western developed country.These tires are contaminated environment not only, and waste resource, thereby the processing of junked tire has become serious social concern.Often can see the junked tire phenomenon that pile up like a mountain.In general situation, some tire can renovate reparation, and then reuses.But be more to make refining glue, the processing of the high pollutions such as oil refining after junked tire is reclaimed.Especially the recycling of rail tyre has more pollution problem.
Countries in the world are extremely paid close attention to the comprehensive utilization of junked tire resource, and the utilization of junked tire regenerated resources can be alleviated the industrial production situation that there is lack of raw materials to a certain extent, particularly aspect rubber, steel wire, carbon black; Its pollution that utilizes process to produce is little compared with using Resources; Use price low compared with Resources, can produce larger economic benefit and the post that can create more jobs.
China is owing to lacking corresponding rules and incentive policy, and the domestic unordered processing about junked tire and illegal utilization make it to become all multicontaminated sources, and band is served the social concern that is unfavorable for harmonious development simultaneously.National Program for Medium-to Long-term Scientific and Technological Development (2006～2020) points out, the resource of discarded object and to recycle be one of major issue improving concerning the sustainable development of socio-economy and people's living standard.Junked tire reclaims and the standardization of utilization is thing sooner or later in China, and the task of top priority is how to develop and to improve the comprehensive Utilization Ways that can consume in a large number junked tire, and particularly those can reduce recycling method and the technology of secondary pollution.The original shape utilization of junked tire or the original shape transformation of the way can not produce secondary pollution substantially, be the at present most popular recycling mode with advocating, but corresponding junked tire consumption are little.
On the other hand, in order to meet the material performance requirement improving constantly, rubber is towards high strength, wear-resisting, stable and ageing-resistant future development, but caused the problem that rubber after discarded over a long time can not natural degradation simultaneously, a large amount of waste olds has caused than the more unmanageable black pollution of plastic pollution (white pollution), and has wasted valuable rubber sources.The whole world has millions of tons scrap rubber to produce every year, and quantity is so huge, how it is carried out to effective processing and has become whole society's question of common concern.
Yet for the disposal of junked tire, also there is no up to now a kind of meet environmental protection, energy-conservation, efficient, the low-cost method requiring comprehensively.The whole bag of tricks of processing waste old by chemical industry is not fully up to expectations, there is at present partial monopoly to provide physical method to utilize the scheme of junked tire, for example adopt junked tire as the cushion coat on guardrail surface, be used for overcoming the mechanical type buffer structures such as spring and have complex structure, cost is high, is unfavorable for the problem of promoting the use of.But this mode is just utilized the toughness feature of junked tire passively, do not make full use of the mechanical properties such as elasticity that junked tire self still has and supportive.
Summary of the invention
The object of the invention is to make full use of the mechanical property of each junked tire self, combine and form the distributed junked tire prestress steel structure water storage regulating system of Integral combined structure with prestress wire or reinforcing bar or prestressed reinforcement, reduced manufacturing cost, avoid environment pollution, can save recycle-water resource and reach water storage soil conservation function simultaneously.
For achieving the above object, the present invention adopts following technical scheme: a kind of junked tire prestressing force reservoir, comprises junked tire assembly ground and junked tire reservoir body; Described junked tire assembly ground is the integral body fixedly being formed by horizontal and vertical prestress wire or reinforcing bar or prestressed reinforcement by the junked tire of a plurality of and column distribution; Junked tire assembly ground is filled and antiseepage processing; Junked tire reservoir body is on junked tire assembly ground, along the oval circular or square upwards staggered junked tire formation reservoir sidewall of piling up, described reservoir sidewall by a plurality of junked tires around forming circulus, in each junked tire, be penetrated with outer shroud steel strand or reinforcing bar and interior ring steel strand or reinforcing bar and apply respectively prestressing force, wherein the prestress strength of interior ring steel strand or reinforcing bar is greater than outer shroud steel strand or prestressed, reinforced intensity; After multilayer prestressing force annulus assembly superposes up and down, run through and fixed axis to prestress wire or reinforcing bar and apply prestressing force, form prestressing force oval ring or annular or cylindricality stereochemical structure; In each junked tire, establish packed layer and keep surfacing, at flat surface, do waterproofing course, in waterproofing course outside, be fixed with surface layer; Described junked tire reservoir body bottom sidewall is provided with silt outlet and door, at junked tire reservoir body upside, is communicated with water inlet pipe, and downside is communicated with outlet pipe.At junked tire reservoir body interior upside and downside, be respectively arranged with level sensor and lower level sensor.In junked tire body, be provided with filter screen, filter screen and junked tire inner body wall surround filtration beds, and described upper level sensor and lower level sensor are positioned at filtration beds.Inner side at adjacent junked tire interface is connected with interior stretcher.Described interior stretcher is the push rod that has been threaded respectively at the two ends of a center adjustment swivel nut, and both sides screw thread is left-hand thread, and the end of both sides push rod is respectively arranged with top pin, and top, both sides pin is provided with for settling the through hole of steel strand or reinforcing bar.Between adjacent junked tire, be provided with and keep adjacent junked tire that the shaped element misplacing up and down does not occur.Described shaped element comprises upper and lower panel and web, and in upper and lower panel, is respectively arranged with fixing hole.Described antiseepage processing or waterproofing course are to lay waterproofing geomembrane in junked tire reservoir inner body wall or bottom.
A kind of distributed junked tire water storage system that comprises described junked tire prestressing force reservoir, between upper and lower not contour junked tire prestressing force reservoir, by water-supply-pipe, be communicated with, the outlet pipe of top junked tire prestressing force reservoir is communicated with the water inlet pipe of junked tire prestressing force reservoir by water-supply-pipe, the three-dimensional Water supply network structure of whole formation; Water inlet pipe and outlet pipe at each junked tire prestressing force reservoir are respectively arranged with water inlet control valve and outlet water control valve, upper and lower side in each junked tire prestressing force reservoir is respectively arranged with level sensor and lower level sensor simultaneously, described upper level sensor is connected with the signal input part of lower level sensor respectively at processor, and the control end of processor is connected with outlet water control valve with each water inlet control valve respectively.Junked tire drainage layer is laid in region between upside junked tire prestressing force reservoir and downside junked tire prestressing force reservoir along the low region of physical features, the integral body that this junked tire drainage layer is fixedly formed by horizontal and vertical prestress wire or reinforcing bar or prestressed reinforcement by the junked tire of a plurality of and column distribution; Junked tire assembly ground is filled and antiseepage processing; In each junked tire, establish packed layer and keep surfacing, at flat surface, do waterproofing course, in waterproofing course outside, be fixed with surface layer; The low water stage end of each drainage layer is communicated with bottom junked tire prestressing force reservoir.
The invention has the beneficial effects as follows: 1, the present invention combines by means of prestress wire or reinforcing bar or prestressed reinforcement and junked tire, make full use of the features such as the resiliency supported, life-span of junked tire is long, prestress wire or reinforcing bar or prestressed reinforcement provide pulling force, junked tire provides inner support power, under pulling force and support force acting in conjunction, structure is highly stable reliable.Scattered junked tire combination of monomers forms integral body, gives full play to the mechanical property of junked tire, and junked tire reservoir is done after effective seepage control measure, can be used as the adjustable type reservoir of series connection successively, reaches twice laid object.By means of the very high intensity of junked tire and toughness, and the very long length of service can make corresponding fence facility also have due intensity and flexibility.
2, because each tire after applying prestressing force produces displacement when mutually pushing, framework can regulate compensate for displacement amount, makes steel strand or reinforcing bar in taking crooked optimum stretch state.In addition, the distributed junked tire prestress steel structure water storage regulating system of using year in year out, junked tire has the aging phenomenon of different length, and the adjustability by interior stretcher further applies prestressing force to steel strand or reinforcing bar, improves the application life of reservoir.
3, each junked tire prestressing force reservoir is interconnected respectively, and can automatically control maintenance water level, reaches the object of automatic water-storing water saving.The mud of junked tire prestressing force reservoir deposition is conducive to keep soil not run off.Thereby the present invention utilizes junked tire to reach and prevents erosion, be beneficial to the effect of vegetation curing soil.
Accompanying drawing explanation
Fig. 1 is the distributed junked tire water storage system of the present invention schematic diagram;
Fig. 2 is the agent structure schematic diagram of junked tire prestressing force reservoir of the present invention;
Fig. 3 is the perspective view of junked tire prestressing force reservoir of the present invention;
Fig. 4 is the cross-sectional view of Fig. 3;
Fig. 5 is the individual layer prestressed structure schematic diagram of junked tire prestressing force reservoir of the present invention;
Fig. 6 is one of sectional perspective schematic diagram of junked tire prestressing force reservoir of the present invention;
Fig. 7 be junked tire prestressing force reservoir of the present invention sectional perspective schematic diagram two;
Fig. 8 is the local structure for amplifying schematic diagram of Fig. 5;
Fig. 9 is the perspective view of shaped element;
Figure 10 is the circuit control block diagram of distributed junked tire water storage system in Fig. 8.
Number in the figure 1 is junked tire, 2 is outer shroud prestress wire or reinforcing bar, 3 is interior ring prestress wire or reinforcing bar, 4 is axial prestress steel strand or reinforcing bar, 5 is end fixture, 6 is support member, 61 is panel, 62 is web, 63 is fixing hole, 7 is interior stretcher, 8 is junked tire prestressing force reservoir, 9 is packed layer, 10 is waterproofing course, 11 is outer, 12 is silt outlet, 13 is door, 14 is junked tire assembly ground, 15 is water storage, 16 is mud, 17 is water inlet pipe, 18 is outlet pipe, 19 is water inlet control valve, 20 is outlet water control valve, 21 is upper level sensor, 22 is lower level sensor, 23 is filter screen, 24 is water-supply-pipe, 25 is anchor pole, 26 is oblique prestress wire or reinforcing bar, 27 is hillside, 28 is ponding guide groove, 29 is two way water pump.
the specific embodiment:
Below in conjunction with accompanying drawing, the invention will be further described.
Embodiment 1: a kind of junked tire prestressing force reservoir, referring to Fig. 2, Fig. 3 and Fig. 4, junked tire assembly ground 14 is the integral body fixedly being formed by horizontal and vertical prestress wire or reinforcing bar or prestressed reinforcement by the junked tire 1 of a plurality of and column distribution, and the bottom of junked tire assembly ground 14 can be fixed on earth's surface by anchor pole 25.Junked tire reservoir body is on junked tire assembly ground 14, along the oval circular or square upwards staggered junked tire formation reservoir sidewall of piling up.Referring to Fig. 2, Fig. 3 and Fig. 6, each junked tire is penetrated with axial prestress steel strand or reinforcing bar 4 vertically, and referring to Fig. 2, Fig. 3 and Fig. 7, the junked tire of tilt distribution is along oblique oblique prestress wire or the reinforcing bar 26 of being penetrated with.In Fig. 2, slope is provided with ponding guide groove 28 near the mountain, junked tire drainage layer can be communicated with ponding guide groove 28.
Referring to Fig. 5, reservoir sidewall by a plurality of junked tires around forming circulus, in each junked tire, be penetrated with outer shroud prestress wire or reinforcing bar 2 and interior ring prestress wire or reinforcing bar 3 and apply respectively prestressing force, wherein 3 prestress strengths of interior ring steel strand or reinforcing bar are greater than outer shroud steel strand or prestressed, reinforced intensity 2.Referring to Fig. 6 and Fig. 7, after multilayer prestressing force annulus assembly superposes up and down, run through and fixed axis to prestress wire or reinforcing bar and apply prestressing force, form prestressing force oval ring or annular or cylindricality stereochemical structure.Referring to Fig. 3, in each junked tire 1, establish packed layer 9 and keep surfacing, at flat surface, do waterproofing course 10, in waterproofing course 10 outsides, be fixed with surface layer; Described junked tire reservoir body bottom sidewall is provided with silt outlet 12 and door 13.Referring to Fig. 4, at junked tire reservoir body upside, be communicated with water inlet pipe 17, downside is communicated with outlet pipe 18.At junked tire reservoir body interior upside and downside, be respectively arranged with level sensor 21 and lower level sensor 22.In junked tire body, be provided with filter screen 23, filter screen 23 surrounds filtration beds with junked tire inner body wall, and described upper level sensor 21 and lower level sensor 22 are positioned at filtration beds.Water inlet pipe 17 and outlet pipe 18 at each junked tire prestressing force reservoir are respectively arranged with water inlet control valve 19 and outlet water control valve 20.
Referring to Fig. 8, at the inner side of adjacent junked tire interface, be connected with interior stretcher 7.Described interior stretcher 7 is the push rods that have been threaded respectively at the two ends of a center adjustment swivel nut, and both sides screw thread is left-hand thread, and the end of both sides push rod is respectively arranged with top pin, and top, both sides pin is provided with for settling the through hole of steel strand or reinforcing bar.
Referring to Fig. 9, between adjacent junked tire, be provided with and keep adjacent junked tire that the shaped element 6 misplacing up and down does not occur.Described shaped element comprises upper and lower panel 1 and web 62, and in upper and lower panel, is respectively arranged with fixing hole 63.
Embodiment 2: a kind of distributed junked tire water storage system, comprise the junked tire prestressing force reservoir described in embodiment 1, referring to Fig. 1, between upper and lower not contour junked tire prestressing force reservoir 8, by water-supply-pipe 24, be communicated with, the outlet pipe of top junked tire prestressing force reservoir is communicated with the water inlet pipe of junked tire prestressing force reservoir by water-supply-pipe, the three-dimensional Water supply network structure of whole formation; Water inlet pipe and outlet pipe at each junked tire prestressing force reservoir are respectively arranged with water inlet control valve and outlet water control valve, and the upper and lower side in each junked tire prestressing force reservoir is respectively arranged with level sensor and lower level sensor simultaneously.Referring to Figure 10, upper level sensor A1 is connected respectively at the signal input part of processor with lower level sensor A2, and the control end of processor is connected with outlet water control valve B2 with each water inlet control valve B1 respectively.Can also on the outlet pipe of each junked tire prestressing force reservoir, two way water pump 29 be installed, when upstream flows downward, make, two way water pump 29 is not worked, when lower storage basin is upwards promoted, and two way water pump work 29.Junked tire drainage layer is laid in region between upside junked tire prestressing force reservoir and downside junked tire prestressing force reservoir along the low region of physical features, the integral body that this junked tire drainage layer is fixedly formed by horizontal and vertical prestress wire or reinforcing bar or prestressed reinforcement by the junked tire of a plurality of and column distribution; In each junked tire, establish packed layer and keep surfacing, at flat surface, do waterproofing course, for example, adopt waterproofing geomembrane, in waterproofing course outside, be fixed with surface layer; The low water stage end of each drainage layer is communicated with bottom junked tire prestressing force reservoir.
Claims (10)
1. a junked tire prestressing force reservoir, is characterized in that: comprise junked tire assembly ground and junked tire reservoir body; Described junked tire assembly ground is the integral body fixedly being formed by horizontal and vertical prestress wire or reinforcing bar or prestressed reinforcement by the junked tire of a plurality of and column distribution; Junked tire assembly ground is filled and antiseepage processing; Junked tire reservoir body is on junked tire assembly ground, along the oval circular or square upwards staggered junked tire formation reservoir sidewall of piling up, described reservoir sidewall by a plurality of junked tires around forming circulus, in each junked tire, be penetrated with outer shroud steel strand or reinforcing bar and interior ring steel strand or reinforcing bar and apply respectively prestressing force, wherein the prestress strength of interior ring steel strand or reinforcing bar is greater than outer shroud steel strand or prestressed, reinforced intensity; After multilayer prestressing force annulus assembly superposes up and down, run through and fixed axis to prestress wire or reinforcing bar and apply prestressing force, form prestressing force oval ring or annular or cylindricality stereochemical structure; In each junked tire, establish packed layer and keep surfacing, at flat surface, do waterproofing course, in waterproofing course outside, be fixed with surface layer; Described junked tire reservoir body bottom sidewall is provided with silt outlet and door, at junked tire reservoir body upside, is communicated with water inlet pipe, and downside is communicated with outlet pipe.
2. junked tire prestressing force reservoir according to claim 1, is characterized in that: described antiseepage processing or waterproofing course are to lay waterproofing geomembrane in junked tire reservoir inner body wall or bottom.
3. junked tire prestressing force reservoir according to claim 1, is characterized in that: at junked tire reservoir body interior upside and downside, be respectively arranged with level sensor and lower level sensor.
4. junked tire prestressing force reservoir according to claim 3, is characterized in that: in junked tire body, be provided with filter screen, filter screen and junked tire inner body wall surround filtration beds, and described upper level sensor and lower level sensor are positioned at filtration beds.
5. according to the junked tire prestressing force reservoir described in claim 1-4 any one, it is characterized in that: the inner side at adjacent junked tire interface is connected with interior stretcher.
6. junked tire prestressing force reservoir according to claim 5, it is characterized in that: described interior stretcher is the push rod that has been threaded respectively at the two ends of a center adjustment swivel nut, both sides screw thread is left-hand thread, the end of both sides push rod is respectively arranged with top pin, and top, both sides pin is provided with for settling the through hole of steel strand or reinforcing bar.
7. junked tire prestressing force reservoir according to claim 1, is characterized in that: between adjacent junked tire, be provided with and keep adjacent junked tire that the shaped element misplacing up and down does not occur.
8. junked tire prestressing force reservoir according to claim 6, is characterized in that: described shaped element comprises upper and lower panel and web, and in upper and lower panel, is respectively arranged with fixing hole.
9. a distributed junked tire water storage system, is characterized in that: comprise upper and lower not contour junked tire prestressing force reservoir, each junked tire prestressing force reservoir comprises junked tire assembly ground and junked tire reservoir body; Described junked tire assembly ground is the integral body fixedly being formed by horizontal and vertical prestress wire or reinforcing bar or prestressed reinforcement by the junked tire of a plurality of and column distribution; Junked tire assembly ground is filled and antiseepage processing; Junked tire reservoir body is on junked tire assembly ground, along the oval circular or square upwards staggered junked tire formation reservoir sidewall of piling up, described reservoir sidewall by a plurality of junked tires around forming circulus, in each junked tire, be penetrated with outer shroud steel strand or reinforcing bar and interior ring steel strand or reinforcing bar and apply respectively prestressing force, wherein the prestress strength of interior ring steel strand or reinforcing bar is greater than outer shroud steel strand or prestressed, reinforced intensity; After multilayer prestressing force annulus assembly superposes up and down, run through and fixed axis to prestress wire or reinforcing bar and apply prestressing force, form prestressing force oval ring or annular or cylindricality stereochemical structure; In each junked tire, establish packed layer and keep surfacing, at flat surface, do waterproofing course, in waterproofing course outside, be fixed with surface layer; Described junked tire reservoir body bottom sidewall is provided with silt outlet and door, at junked tire reservoir body upside, is communicated with water inlet pipe, and downside is communicated with outlet pipe; Between upper and lower not contour junked tire prestressing force reservoir, by water-supply-pipe, be communicated with, the outlet pipe of top junked tire prestressing force reservoir is communicated with the water inlet pipe of junked tire prestressing force reservoir by water-supply-pipe, the three-dimensional Water supply network structure of whole formation; Water inlet pipe and outlet pipe at each junked tire prestressing force reservoir are respectively arranged with water inlet control valve and outlet water control valve, upper and lower side in each junked tire prestressing force reservoir is respectively arranged with level sensor and lower level sensor simultaneously, described upper level sensor is connected with the signal input part of lower level sensor respectively at processor, and the control end of processor is connected with outlet water control valve with each water inlet control valve respectively.
10. distributed junked tire water storage system according to claim 9, it is characterized in that: junked tire drainage layer is laid in the region between upside junked tire prestressing force reservoir and downside junked tire prestressing force reservoir along the low region of physical features the integral body that this junked tire drainage layer is fixedly formed by horizontal and vertical prestress wire or reinforcing bar or prestressed reinforcement by the junked tire of a plurality of and column distribution; In each junked tire, establish packed layer and keep surfacing, at flat surface, do waterproofing course, in waterproofing course outside, be fixed with surface layer; The low water stage end of each drainage layer is communicated with bottom junked tire prestressing force reservoir.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410352317.1A CN104164992B (en) | 2014-07-23 | 2014-07-23 | Junked tire prestressing force reservoir and distributed junked tire water storage system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410352317.1A CN104164992B (en) | 2014-07-23 | 2014-07-23 | Junked tire prestressing force reservoir and distributed junked tire water storage system |
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| CN104164992A true CN104164992A (en) | 2014-11-26 |
| CN104164992B CN104164992B (en) | 2016-08-24 |
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| CN201410352317.1A Active CN104164992B (en) | 2014-07-23 | 2014-07-23 | Junked tire prestressing force reservoir and distributed junked tire water storage system |
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| JP2002242157A (en) * | 2001-02-14 | 2002-08-28 | Kyosei Kiko Kk | Tire form coating block |
| AU2007201943A1 (en) * | 2006-07-06 | 2008-01-24 | Ecoflex Australia Pty Limited | Aquifer |
| CN102425138A (en) * | 2011-12-26 | 2012-04-25 | 华北水利水电学院 | Slope protection or flood control dam using discarded tyres |
| CN103696457A (en) * | 2013-05-22 | 2014-04-02 | 华北水利水电大学 | Water and soil resource keeping method and distributed steel storage reservoir in karst region |
| CN204266661U (en) * | 2014-07-23 | 2015-04-15 | 华北水利水电大学 | Distributed junked tire prestress steel structure water storage regulating system |
-
2014
- 2014-07-23 CN CN201410352317.1A patent/CN104164992B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5823711A (en) * | 1995-11-01 | 1998-10-20 | Environmental Golf System U.S.A., Inc. | Water drainage and collection system and method of construction thereof |
| CN1314964A (en) * | 1998-08-06 | 2001-09-26 | 澳大利亚埃科夫莱克斯有限公司 | Tyre foundation structure |
| JP2002242157A (en) * | 2001-02-14 | 2002-08-28 | Kyosei Kiko Kk | Tire form coating block |
| AU2007201943A1 (en) * | 2006-07-06 | 2008-01-24 | Ecoflex Australia Pty Limited | Aquifer |
| CN102425138A (en) * | 2011-12-26 | 2012-04-25 | 华北水利水电学院 | Slope protection or flood control dam using discarded tyres |
| CN103696457A (en) * | 2013-05-22 | 2014-04-02 | 华北水利水电大学 | Water and soil resource keeping method and distributed steel storage reservoir in karst region |
| CN204266661U (en) * | 2014-07-23 | 2015-04-15 | 华北水利水电大学 | Distributed junked tire prestress steel structure water storage regulating system |
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