CN106401010A - Environmental-friendly wall for electric power station - Google Patents

Environmental-friendly wall for electric power station Download PDF

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Publication number
CN106401010A
CN106401010A CN201610889369.1A CN201610889369A CN106401010A CN 106401010 A CN106401010 A CN 106401010A CN 201610889369 A CN201610889369 A CN 201610889369A CN 106401010 A CN106401010 A CN 106401010A
Authority
CN
China
Prior art keywords
support tube
bracing frame
sound
steel wire
layer
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN201610889369.1A
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Chinese (zh)
Other versions
CN106401010B (en
Inventor
刘希洋
刘炳言
刘成光
周永杰
孙英杰
王翔宇
刘敏昌
于强
张翠玲
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Grid Shandong Electric Power Co Qixia Power Supply Co
Original Assignee
State Grid Shandong Electric Power Co Qixia Power Supply Co
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Application filed by State Grid Shandong Electric Power Co Qixia Power Supply Co filed Critical State Grid Shandong Electric Power Co Qixia Power Supply Co
Priority to CN201610889369.1A priority Critical patent/CN106401010B/en
Publication of CN106401010A publication Critical patent/CN106401010A/en
Application granted granted Critical
Publication of CN106401010B publication Critical patent/CN106401010B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84Sound-absorbing elements
    • E04B1/86Sound-absorbing elements slab-shaped
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B2/00Walls, e.g. partitions, for buildings; Wall construction with regard to insulation; Connections specially adapted to walls
    • E04B2/56Load-bearing walls of framework or pillarwork; Walls incorporating load-bearing elongated members
    • EFIXED CONSTRUCTIONS
    • E04BUILDING
    • E04BGENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B1/84Sound-absorbing elements
    • E04B2001/8457Solid slabs or blocks
    • E04B2001/8476Solid slabs or blocks with acoustical cavities, with or without acoustical filling
    • E04B2001/848Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element
    • E04B2001/8495Solid slabs or blocks with acoustical cavities, with or without acoustical filling the cavities opening onto the face of the element the openings going through from one face to the other face of the element

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Acoustics & Sound (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Building Environments (AREA)

Abstract

The invention discloses an environmental-friendly wall for an electric power station. The environmental-friendly wall comprises a hollow supporting frame and a plurality of supporting pipes. The hollow supporting frame is made of steel reinforcements. The supporting pipes are arranged on the inner side of the supporting frame, and are arranged in the thickness direction of the supporting frame. The supporting pipes are in plug-in connection in a rectangular cavity between adjacent steel reinforcements of the supporting frame. Each supporting pipe adopts a hollow quadrangular structure. Flanges, which are distributed at intervals, are respectively arranged on the side walls of the adjacent supporting pipes. The length direction of the flanges is parallel to that of the supporting pipes. The flanges on the adjacent supporting pipes are arranged in a staggered manner. A concrete layer is arranged on the outer side of the supporting frame. Sound insulation layers are arranged on the inner side of the concrete layer. According to the invention, by adoption of the hollow supporting pipes arranged on the inner side of the supporting frame, good sound insulation and heat insulation effects can be achieved.

Description

A kind of electric power station environmental protection wall
Technical field
The present invention relates to a kind of electric power station environmental protection wall.
Background technology
Existing body of wall is usually concreting and is formed, and heat insulation effect is poor, causes the high energy consumption of building, in order to carry High heat insulation effect, often adopts the structure of inner hollow, and the structure of hollow, body of wall is easily damaged, and quality is affected.
Content of the invention
It is an object of the invention to provide a kind of electric power station environmental protection wall, the problem of prior art presence can be improved, pass through Using the support tube being arranged on inside bracing frame, using the support tube of hollow, good sound-insulating effect can be played.
The present invention is achieved through the following technical solutions:
A kind of electric power station environmental protection wall, the bracing frame of the hollow made including reinforcing bar and be arranged on several inside described bracing frame Support tube, along described bracing frame thickness direction setting, described support tube is plugged on described bracing frame to described support tube In rectangular enclosure between upper adjacent reinforcing bar, described support tube is quadrilateral shape structure, in adjacent described support tube Side wall on be respectively arranged with the flange being intervally arranged, the length direction of described flange is parallel to described support length of tube side To, the interlaced setting of flange on adjacent described support tube, it is provided with concrete layer outside described bracing frame, in institute It is provided with sound-isolating sponge layer inside the concrete layer stated.Reinforcing bar is intersected to form network, two-grid structure inside and outside formation Bracing frame, by reinforcing bar by welding or other on-link mode (OLM)s be fixed, support tube is plugged on inside the grid of bracing frame, Make the interlaced grafting of flange on adjacent supports pipe, make support tube fill the mesh space on bracing frame, the two ends of support tube Stretch out two end faces of two-layer bracing frame respectively, bond sound-isolating sponge layer outside support tube, and pour outside sound-isolating sponge layer Build concrete layer, form overall structure.Due to being provided with sound-isolating sponge, good blocking effect can be played to noise, can Improve the soundproof effect of building, in the present invention, the bracing frame made using reinforcing bar, can play support effect to overall structure Really, improve integrally-built anti seismic efficiency, make supporting tube structure more stable, and, be filled in bracing frame using support tube Side, using the support tube of hollow, can play good sound-insulating effect, substantially reduce the energy consumption of building, and, in utilization The support tube of hollow structure, can reduce the weight of body of wall, because adjacent support tube passes through the interlaced setting of flanged structure, make Adjacent support tube can not produce relative dislocation, so that adjacent support after being fixed by the concrete layer in outside Can mutually support so as to more stable between pipe, anti-seismic performance is more preferable.Because sound-isolating sponge has certain deformation space, this In invention, it is filled between concrete layer and support tube using sound-isolating sponge, when body of wall is subject to horizontal shearing force, Neng Gouyan The relative movement of flange length direction, make support tube relative to produce move during, contact sound-isolating sponge during, can Row buffering is entered to active force, it is to avoid body of wall is being produced horizontal crack by instantaneous force when excessive, reduce the damage of body of wall. It is provided with steel wire net rack inside described sound-isolating sponge layer, described steel wire net rack edge is respectively wound around described bracing frame On edge, described steel wire net rack outboard bonds, on described sound-isolating sponge layer, are pressed together on institute inside described steel wire net rack On the support tube stated.In the present invention, in order to improve integrally-built stability, using steel wire net rack, support tube is fixed, Make steel wire net rack that support tube to be pressed together on bracing frame, so that steel wire net rack is wrapped in outside support tube by support tube, can to The horizontal moving range of stay tube is limited, it is to avoid body of wall is subject to generation over-large displacement during horizontal shearing force to cause body of wall to produce The problems such as horizontal fracture.Match with flanged structure, body of wall can be controlled in horizontal deformation space, it is to avoid body of wall It is damaged.
Further, for the present invention is better achieved, described support tube edges at two ends is provided with latticed groove, Described steel wire net rack is connected to inside accordingly described groove.By adopting groove structure, can facilitate to steel wire net rack Displacement is defined, it is to avoid steel wire net rack, from the landing of support tube two ends, is favorably improved the stability of steel wire net rack.
Further, for the present invention is better achieved, the sound-isolating sponge layer described in both sides is 2 layers be arrangeding in parallel, 2 It is respectively arranged with sound panel between sound-isolating sponge layer described in layer.By arranging sound panel, can be to the shape of two-layer sound-isolating sponge Become scope to be defined, meanwhile, it is capable to improve the soundproof effect of body of wall.
Further, the through hole of regular distribution, for the present invention is better achieved, is provided with described sound panel, described The diameter of through hole be gradually reduced.By arranging through-hole structure, form the passage of transmission sound wave, so that the larger one end of through-hole diameter is made For inner side body of wall, after sound wave passes through outer layer sound-isolating sponge, portion of energy is absorbed by the irregular hole on sound-isolating sponge, is passing through During through hole, the cavity that is gradually reduced along internal diameter, its energy is gradually absorbed by sound panel, during by the sound-isolating sponge of internal layer, its Energy is absorbed again, is gradually successively decreased by the acoustic wave energy of body of wall, and then can play more preferable soundproof effect.
Further, for the present invention is better achieved, it is respectively arranged with fixed support in described bracing frame both sides, described Fixed support be made up of reinforcing bar, described fixed support is hollow structure, is provided with 2 layers of coagulation inside described fixed support Native plate, is respectively arranged with jack on described concrete slab, and the reinforcing bar constituting described bracing frame extends through described consolidating Fixed rack is simultaneously plugged on inside described jack, and the jack on concrete slab described in 2 mutually staggers, and props up in described fixation Frame outer side covers have concrete layer.By adopting fixed support, can facilitate and bracing frame edge is fixed, due to adopting With concrete slab, bracing frame edge reinforcement end can be fixed, in casting process, pour first near bracing frame one Then the reinforcing bar of bracing frame is bent by the concrete slab of side, then pours away from bracing frame one layer concrete plate, due to reinforcing bar It is fixed by two-layer concrete slab after bending, it is possible to increase the stability of reinforcing bar, reinforcing bar is fixed, is being subject to During to applied external force, it is not easy to come off from fixed support through the fixing reinforcing bar of concrete slab, can be greatly improved it and resist Deformation effect.By outside concrete layer, fixed support is wrapped up so as to be not easy impaired.
The present invention compared with prior art, has the advantages that:
The present invention is by being arranged on the bracing frame inside inside and outside both concrete layers, it is possible to increase the resistance to deformation effect of body of wall, makes It has more preferable anti-seismic performance, by being arranged on the support tube inside bracing frame, can play good sound-insulating effect, Substantially reduce the energy consumption of building, and utilize sound-isolating sponge, more preferable soundproof effect can be played, make body of wall have preferably every Sound, heat insulation effect.
Brief description
In order to be illustrated more clearly that the technical scheme of the embodiment of the present invention, below will be attached to use required in embodiment Figure is briefly described it will be appreciated that the following drawings illustrate only certain embodiments of the present invention, and it is right to be therefore not construed as The restriction of scope, for those of ordinary skill in the art, on the premise of not paying creative work, can also be according to this A little accompanying drawings obtain other related accompanying drawings.
Fig. 1 is overall structure diagram of the present invention;
Fig. 2 is supporting tube structure schematic diagram of the present invention.
Wherein:101. bracing frames, 102. support tubes, 103. flanges, 104. concrete layers, 105. sound-isolating sponge layers, 106. Steel wire net rack, 107. sound panels, 108. through holes, 109. fixed supports, 110. concrete slabs.
Specific embodiment
With reference to specific embodiment, the present invention is described in further detail, but embodiments of the present invention are not limited to This.
Embodiment 1:
As shown in figure 1, a kind of electric power station environmental protection wall, the bracing frame 101 of the hollow made including reinforcing bar and be arranged on described Several support tubes 102 of support 101 inner side, bracing frame intersects to form the network of inside and outside two-layer, support tube two ends by reinforcing bar It is plugged on the grid in the hole in two-grid structure respectively, described support tube 102 sets along described bracing frame 101 thickness direction Put, make the two ends of support tube stretch out the two-grid structural outer of bracing frame respectively, described support tube 102 is plugged on described In rectangular enclosure between adjacent reinforcing bar on bracing frame 101, support tube is made to fill two-grid structure, as shown in Fig. 2 described Support tube 102 be quadrilateral shape structure, support tube be in matrix arrange, make to be fitted in bracing frame positioned at outermost support tube On network inside, the side wall of adjacent described support tube 102 is respectively arranged with the flange 103 being intervally arranged, institute The length direction of the flange 103 stated is parallel to described support tube 102 length direction, convex on adjacent described support tube 102 The interlaced setting of edge 103, adjacent support tube is mutually inserted together by flanged structure, so that adjacent support tube only can Move it is impossible to enough relative width directions or short transverse move relative to along its length, in described bracing frame 101 outside setting There is concrete layer 104, by concrete layer, support tube be fixed, so that support tube can not be moved relative to alongst, It is provided with sound-isolating sponge layer 105 inside described concrete layer 104, with the irregular pore structure on sound-isolating sponge layer, play Soundproof effect.Because support tube is hollow structure, heat insulation effect can be played, reduce the energy consumption of body of wall, and, due to support tube It is filled in the network inside bracing frame, makes bracing frame be not easy to be deformed, the resistance to deformation effect of body of wall can be improved, by Pass through the interlaced setting of flange in adjacent support tube, make between adjacent support tube, to keep stable, make the anti-of body of wall Shock stability is higher, and in the presence of sound-isolating sponge layer, when body of wall is subject to horizontal shearing force, support tube produces horizontal movement When, row buffering can be entered to support tube, it is to avoid support tube damages concrete layer in stress.
In order to improve the stability of support tube it is preferable that being provided with steel wire net rack inside described sound-isolating sponge layer 105 106, form network using steel wire winding, described steel wire net rack 106 edge is respectively wound around described bracing frame 101 side On edge, steel wire net rack is made relatively to be fitted in outside support tube, described steel wire net rack 106 outboard bonds are in described sound-isolating sponge On layer 105, it is pressed together on inside described steel wire net rack 106 on described support tube 102, produces along its length in support tube During displacement, using steel wire net rack, the displacement of support tube is defined, the relative deformation of body of wall can be reduced.
Embodiment 2:
Described support tube 102 edges at two ends is provided with latticed groove, described steel wire net rack 106 is connected to corresponding institute Inside the groove stated.By arranging groove, so that the steel wire of composition steel wire net rack is embedded in groove, enable steel wire net rack relatively Support tube keeps stable, it is to avoid steel wire net rack landing from support tube.
In order to improve soundproof effect, in the present embodiment, the sound-isolating sponge layer 105 described in both sides is 2 layers be arrangeding in parallel, It is respectively arranged with sound panel 107 between sound-isolating sponge layer 105 described at 2 layers.By arranging 2 layers of sound-isolating sponge, it is possible to increase Soundproof effect, using the sound panel being arranged between sound-isolating sponge, can facilitate and sound-isolating sponge is fixed, by sound-isolating sponge It is bonded on sound panel, can adopt the structures such as pre-embedded bolt that sound panel is fixed on concrete layer, then can carry The stability being connected between high sound-isolating sponge and concrete layer.
It is further preferred that the through hole 108 of regular distribution, institute, in the present embodiment, are provided with described sound panel 107 The diameter of the through hole 108 stated is gradually reduced.The through hole being gradually reduced using diameter, forms sound wave transmission channels, because sound wave passes During passing, its passage is less and less, and sound wave is absorbed by sound panel, and is absorbed by the irregular through hole on sound-isolating sponge, So that acoustic wave energy is gradually lowered, the soundproof effect of body of wall can be greatly improved.
Embodiment 3:
In the present embodiment, be respectively arranged with fixed support 109 in described bracing frame 101 both sides, make fixed support be used for Support edge is fixed, and described fixed support 109 is made up of reinforcing bar, intersects to form network by reinforcing bar, and described consolidates Fixed rack 109 is hollow structure, is provided with 2 layer concrete plates 110, so that 2 layer concrete plates is filled out inside described fixed support 109 Fill fixed support inner space, described concrete slab 110 is respectively arranged with jack, in casting concrete plate, make to prop up Reinforcing bar on support stretches into inside fixed support, casting concrete plate, and reinforcing bar position can form jack structure, described in composition The reinforcing bar of bracing frame 101 extends through described fixed support 109 and is plugged on the coagulation inside described jack, described in 2 Jack on native plate 110 mutually staggers, and by arranging the jack mutually staggering, makes the end reinforced formation bending of composition bracing frame Structure, using the reinforcing bar of bending relatively, makes bracing frame when being acted on by external force, under the restriction of end concrete slab, does not allow It is also easy to produce deformation, the stability of bracing frame can be greatly improved, have concrete layer in described fixed support 109 outer side covers 104, so that the concrete layer outside fixed support is connected with each other with the concrete layer outside sound-isolating sponge.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for the skill of this area For art personnel, the present invention can have various modifications and variations.All within the spirit and principles in the present invention, made any repair Change, equivalent, improvement etc., should be included within the scope of the present invention.

Claims (5)

1. a kind of electric power station environmental protection wall it is characterised in that:The bracing frame of the hollow made including reinforcing bar(101)And it is arranged on described Bracing frame(101)Several support tubes of inner side(102), described support tube(102)Along described bracing frame(101)Thickness side To setting, described support tube(102)It is plugged on described bracing frame(101)In rectangular enclosure between upper adjacent reinforcing bar, Described support tube(102)For quadrilateral shape structure, in adjacent described support tube(102)Side wall on be respectively arranged between Flange every arrangement(103), described flange(103)Length direction parallel to described support tube(102)Length direction, phase Support tube described in neighbour(102)On flange(103)Interlaced setting, in described bracing frame(101)Outside is provided with mixed Solidifying soil layer(104), in described concrete layer(104)Inner side is provided with sound-isolating sponge layer(105), in described sound-isolating sponge layer (105)Inner side is provided with steel wire net rack(106), described steel wire net rack(106)Edge is respectively wound around described bracing frame (101)On edge, described steel wire net rack(106)Outboard bonds are in described sound-isolating sponge layer(105)On, described steel wire Frame(106)Inner side is pressed together on described support tube(102)On.
2. a kind of electric power station environmental protection wall according to claim 1 it is characterised in that:In described support tube(102)Two ends Edge is provided with latticed groove, described steel wire net rack(106)It is connected to inside accordingly described groove.
3. a kind of electric power station environmental protection wall according to claim 1 it is characterised in that:Sound-isolating sponge layer described in both sides (105)It is 2 layers be arrangeding in parallel, the sound-isolating sponge layer described at 2 layers(105)Between be respectively arranged with sound panel(107).
4. a kind of electric power station environmental protection wall according to claim 3 it is characterised in that:In described sound panel(107)On set It is equipped with the through hole of regular distribution(108), described through hole(108)Diameter be gradually reduced.
5. a kind of electric power station environmental protection wall according to claim 1 it is characterised in that:In described bracing frame(101)Both sides It is respectively arranged with fixed support(109), described fixed support(109)It is made up of reinforcing bar, described fixed support(109)For in Hollow structure, described fixed support(109)Inner side is provided with 2 layer concrete plates(110), in described concrete slab(110)On It is respectively arranged with jack, constitute described bracing frame(101)Reinforcing bar extend through described fixed support(109)And be plugged on Concrete slab inside described jack, described in 2(110)On jack mutually stagger, in described fixed support(109)Outward Side is coated with concrete layer(104).
CN201610889369.1A 2016-10-12 2016-10-12 A kind of electric power station environmental protection wall Active CN106401010B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112343213A (en) * 2020-11-10 2021-02-09 浙江舜元建筑产业化有限公司 Self-heat-preservation superposed shear wall structure and construction method

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE820838A (en) * 1973-10-19 1975-02-03 FIRE-RESISTANT PARTITIONS THAT CAN BE ASSEMBLED FROM CONSTRUCTION ELEMENTS AND MORE PARTICULARLY INTENDED TO BE USED IN SHIPBUILDING
CN104110077A (en) * 2013-12-02 2014-10-22 成都绿迪科技有限公司 Attached building middle wall civil structure
CN204282581U (en) * 2014-12-09 2015-04-22 张静 A kind of heat insulating and sound insulating combined type shear wall
CN204826318U (en) * 2015-07-20 2015-12-02 江苏宇超电力工程有限公司 Outdoor main room sound -proof wall that becomes
CN205314664U (en) * 2016-01-18 2016-06-15 国家电网公司 Novel improve electric power station environmental protection partition wall of structure

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE820838A (en) * 1973-10-19 1975-02-03 FIRE-RESISTANT PARTITIONS THAT CAN BE ASSEMBLED FROM CONSTRUCTION ELEMENTS AND MORE PARTICULARLY INTENDED TO BE USED IN SHIPBUILDING
CN104110077A (en) * 2013-12-02 2014-10-22 成都绿迪科技有限公司 Attached building middle wall civil structure
CN204282581U (en) * 2014-12-09 2015-04-22 张静 A kind of heat insulating and sound insulating combined type shear wall
CN204826318U (en) * 2015-07-20 2015-12-02 江苏宇超电力工程有限公司 Outdoor main room sound -proof wall that becomes
CN205314664U (en) * 2016-01-18 2016-06-15 国家电网公司 Novel improve electric power station environmental protection partition wall of structure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112343213A (en) * 2020-11-10 2021-02-09 浙江舜元建筑产业化有限公司 Self-heat-preservation superposed shear wall structure and construction method

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