CN106978823A - Outer wall of basement advanced water-stop post-pouring zone construction method - Google Patents
Outer wall of basement advanced water-stop post-pouring zone construction method Download PDFInfo
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- CN106978823A CN106978823A CN201710399153.1A CN201710399153A CN106978823A CN 106978823 A CN106978823 A CN 106978823A CN 201710399153 A CN201710399153 A CN 201710399153A CN 106978823 A CN106978823 A CN 106978823A
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D29/00—Independent underground or underwater structures; Retaining walls
- E02D29/16—Arrangement or construction of joints in foundation structures
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/02—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against ground humidity or ground water
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
- E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
- E04B1/0007—Base structures; Cellars
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- Engineering & Computer Science (AREA)
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- Life Sciences & Earth Sciences (AREA)
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- General Life Sciences & Earth Sciences (AREA)
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- Environmental & Geological Engineering (AREA)
- Mining & Mineral Resources (AREA)
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- General Engineering & Computer Science (AREA)
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Abstract
The invention discloses a kind of outer wall of basement advanced water-stop post-pouring zone construction method, the outer wall cracking and leakage problems of outer wall of basement advanced water-stop post-pouring zone are solved, construction quality and efficiency is improved, belongs to field of civil engineering.The present invention comprises the following steps：In the indoor and outdoor both sides colligation exterior wall reinforcing bar of two outer wall of basement adjacents, in the inner side colligation additional bar of exterior wall reinforcing bar；One piece of steel plate for sealing water is respectively installed at the adjacent cross sectional of two outer wall of basement, post-cast strip part is reserved between two pieces of steel plate for sealing water, and in the fertile groove of outdoor side setting foundation ditch of post-cast strip part；Pre-buried brick side form steel tie and cracking resistance reinforced mesh in the fertile groove of foundation ditch, and build brick side form and constructional column by laying bricks or stones；The fertile groove of foundation ditch and post-cast strip part are together poured using expansive concrete.The present invention avoids later stage outer wall cracking, seepage, and reduction is non-essential to do over again and repair, it is adaptable to general Construction of Civil Engineering, high-rise, construction of super highrise building, with very high production, teaching ＆ research value.
Description
Technical field
The present invention relates to a kind of rear pouring tape construction method, especially a kind of outer wall of basement advanced water-stop post-pouring zone construction party
Method.
Background technology
Post-cast strip be to adapt to variation of ambient temperature, concrete shrinkage, the influence of the factor such as structure differential settlement, beam,
That is reserved in the structures such as plate (including sole plate), wall has one fixed width and the concrete poured again after certain time
Band.At present the country high level, Super High, the big scale of construction engineering it is more and more, the scale of construction and height of engineering are constantly increasing, and apply
The cycle of work is lengthened therewith, and the discrepancy in elevation between building structure is also significantly increased, to prevent building settlement inequality from causing main body crack,
Big multiple-project sets post-cast strip between the larger position of the building structure discrepancy in elevation.For example between garage and main building, annex and main building it
Between stay and set post-cast strip.Typically need to be complete in agent structure, post-cast strip concrete is poured again after sedimentation is basicly stable.
Exterior wall：For architectural angle, go along with sb. to guard him building, be allowed to be formed indoor and outdoor boundary component be referred to as it is outer
Wall；The simply earth-retaining effect that outer wall of basement refers to, does not do the wall that support is used.Its function has：Undertake a constant load, block
Wind and rain, insulation, prevent noise, fire safety etc..When building basis is located at below level of ground water, sunk using traditional
Post-cast strip is dropped, and the concreting of post-cast strip must could be closed after agent structure complete rear certain time.This requires to hold
It is continuous to carry out basement precipitation, it is ensured that level of ground water is maintained at below basis, is completed in agent structure and is poured post-cast strip concrete
Afterwards, precipitation could be stopped.The effect of advanced water-stopping band is exactly that local waterproof action is played before not constructed in post-cast strip, therefore is needed
The construction of advanced water-stopping band is done before post empiricism.Outer wall of basement advanced water-stop post-pouring zone is provided with beneficial to the underground space
The stress that make full use of, meet the wide demand of building overlength, discharges building structure differential settlement, ensure structure safety and just
In sectional construction.
But in practice, outer wall of basement advanced water-stop post-pouring zone generally existing construction inconvenience, construction quality are difficult to protect
The problem of card, exterior wall are easy to crack, easy seepage and later period maintenance cost is higher.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of outer wall of basement advanced water-stop post-pouring zone construction method, solve
The outer wall cracking and leakage problems of outer wall of basement advanced water-stop post-pouring zone, improve construction quality and efficiency.
In order to solve the above-mentioned technical problem, the present invention, which is achieved in that, comprises the following steps：
In the indoor and outdoor both sides colligation exterior wall reinforcing bar of two outer wall of basement adjacents, inside and outside the exterior wall reinforcing bar
Side colligation additional bar；
One piece of steel plate for sealing water is respectively installed at the adjacent cross sectional of two outer wall of basement, in two pieces of water-stopping steels
Post-cast strip part is reserved between plate, and pours the outdoor side with part in the rear the fertile groove of foundation ditch is set；
Pre-buried brick side form steel tie and cracking resistance reinforced mesh in the fertile groove of the foundation ditch, and build brick side form and construction by laying bricks or stones
Post；
Together pour described using the expansive concrete of the high grade of concrete strength than the outer wall of basement
Foundation ditch fertilizer groove and post-cast strip part.
According to post-cast strip is shunk, after carrying out the pouring again after the outer wall of basement age of concrete up to 60 days；If
Using pouring after settlement, the pouring is carried out again after the basement superstructure binds 14 days and settlement stability.
After the steel plate for sealing water is installed and before the cracking resistance reinforced mesh is pre-buried, on the steel plate for sealing water
Thin eye expanded metal lath is installed.
After the brick side form is built by laying bricks or stones and before the pouring, to the outdoor side cement mortar of the brick side form
Paint.
After the rendering and before the pouring, in the junction of the fertile groove of the foundation ditch and the outer wall of basement
Additional waterproof coiled material is set.
Treat the outer wall of basement concrete curing simultaneously after form removal, then build the brick side form by laying bricks or stones.
After the brick side form is built by laying bricks or stones and before the constructional column is built by laying bricks or stones, construction waist is poured in the fertile groove of the foundation ditch
Beam.
The constructional column is cast in the wall corner of the brick side form.
Indoor side is sheltered from cover plate when pouring the post-cast strip part.
The steel plate for sealing water half is installed in the outer wall of basement, second half exposes to the post-cast strip part
It is interior.
Compared with prior art, the beneficial effects of the present invention are：By by poured band of outer wall of basement advanced water-stopping portion
Divide (foundation ditch fertilizer groove) to be constructed respectively with outer wall of basement concrete, steel plate for sealing water, brick side form steel tie and cracking resistance reinforcing bar are set
Mesh sheet, and the fertile groove of foundation ditch is together poured with after using the expansive concrete of a grade higher than outer wall of basement concrete strength
Pour band part.It is easy to reinforcement installation, model sheetinstallat, reinforcing and post-cast strip closure；Post-cast strip concrete formation quality is good, antiseep
Effect is good.Later stage outer wall cracking, seepage are avoided, reduction is non-essential to do over again and repair, reduce human and material resources and the wave of financial resources
Take, save construction cost, construction quality and efficiency are improved, with good economic benefit.
Brief description of the drawings
Fig. 1 is the corresponding constructing structure figure of present method invention；
In figure：1. exterior wall reinforcing bar, 2. additional bars, 3. steel plate for sealing water, 4. additional waterproof coiled materials, 5. constructional columns, 6. brick sides
Mould, 7. cracking resistance reinforced mesh, 8. thin expanded metal laths.
Embodiment
The invention will be further described with specific embodiment below in conjunction with the accompanying drawings, so that those skilled in the art can be with
More fully understand the present invention and can be practiced, but illustrated embodiment is not as a limitation of the invention.
Embodiment 1：
The present embodiment overall floorage 106783m2, 2 layers of underground, 48 layers of ground, building height 180m.Index bed floor height is
3.5/3.7m, seismic fortification intensity is 7 degree, and main building framework seismic behavior is one-level, the basic a height of -10.05m of top mark, underground water
Position -1m.Main building part backplane thickness is 2500mm, and podium base plate thickness is 800mm, intends, using post-cast strip is shunk, pouring after contraction
Band is prevents because construction area is excessive, and concrete is because temperature change, the post-cast strip shunk and set are (typically after the shaping of both sides concrete
It can pour within 60 days).
The workflow of the present embodiment is as follows：
Post-pouring belt of outer wall advanced water-stopping part is separated into construction with external wall structure, referring to accompanying drawing 1, first pressed outer wall of basement
Artwork construction is designed, in the indoor and outdoor both sides colligation exterior wall reinforcing bar 1 (lap-welded mode) of two outer wall of basement adjacents,
In the interior outside colligation additional bar 2 of exterior wall reinforcing bar 1.
Each steel plate for sealing water 3 for installing one piece 3 × 300 (thick × wide) at the adjacent cross sectional of two outer wall of basement：Will
The half of steel plate for sealing water 3 is installed in outer wall of basement, and second half is exposed in the part of post-cast strip.Installed on steel plate for sealing water 3 thin
Eye expanded metal lath 8 is simultaneously reinforced.The wide post-cast strip parts of 800mm are reserved between two pieces of steel plate for sealing water 3, and in the outdoor of post-cast strip part
Side sets the fertile groove of rectangle foundation pit.
Pre-buried brick side form steel tie and cracking resistance reinforced mesh 7 in the fertile groove of foundation ditch：Brick side form steel tie uses 2 one
Level reinforcing bar, diameter 6mm, wall full-height direction is set to 500mm spacing, and wall bottom 300mm rises, and brick side form steel tie stretches into ground
In lower outdoor wall, meet anchoring and require；Cracking resistance reinforced mesh 7 uses one-level reinforcing bar, diameter 4mm, transverse and longitudinal spacing 150mm.
After after outer wall of basement concrete curing and form removal, build advanced water-stopping part brick side form 6 by laying bricks or stones in the fertile groove of foundation ditch, press
Masonry panel requirement：Design of Masonry Structures GB50003-2001.The construction parameter of brick side form 6 is：Post-cast strip is compared in empty both sides in mould
Wide 300mm, from outer wall of basement distance 300mm.
The highly super 4m of wall sets and sets one of beam at construction waist rail (building one of construction waist rail by laying bricks or stones at the high every 4m of wall), wall top
Concordant top plate suitable for reading, beam is wide with wall.In the wall corner of brick side form 6, (building by laying bricks or stones) constructional column 5 is set：The same wall thickness of sectional dimension.
The outdoor side of brick side form is painted with cement mortar, sets attached in the junction of the fertile groove of foundation ditch and outer wall of basement
Plus waterproof roll 4, the fertile groove both sides of foundation ditch of waterproof roll 4 respectively overlap 500mm.
After after the outer wall of basement age of concrete up to 60 days, cutting the loose concrete in post-cast strip both sides (loose concrete) and clear up
Totally, the indoor side of post-cast strip part is sheltered from cover plate, it is (strong using the high grade of concrete strength than outer wall of basement
Spend unit：MPa expansive concrete (inside mix the equivalent of micro-expanding agent 10% and replace cement)), together pour the fertile groove of foundation ditch and
Post-cast strip part, and complete maintenance and form removal.
The present embodiment classification setting contraction post-cast strip and pouring after settlement pour condition so that construction technology is obtained carefully
Change, construction process is optimized.
The present embodiment sets steel plate for sealing water and thin eye expanded metal lath by combining, and is prevented effectively from later stage exterior wall leakage.
The present embodiment reaches that exterior wall advanced water-stopping is imitated by constructing the united application that waist rail, constructional column and brick side form are built by laying bricks or stones
Really, and for external wall waterproof complete basic unit face is provided.
The present embodiment is by setting cracking resistance reinforced mesh, it is ensured that the construction quality of rear pouring concrete, is prevented effectively from exterior wall and opens
Split.
The present embodiment is painted by the outdoor side to brick side form with cement mortar, it is ensured that with first pouring metope on the outside of brick side form
It is smooth consistent.
The present embodiment is by setting additional waterproof coiled material, it is to avoid disturbed by post-pouring belt of outer wall, and post-cast strip position is risen
To waterproof reinforced effect, it is ensured that waterproof integral construction quality.
The present embodiment is together poured by using expansive concrete to the fertile groove of foundation ditch and post-cast strip part, super reaching
While preceding water-stagnating effect, contraction distortion ability certain at post-cast strip also ensure that.
The present embodiment shelters from indoor side with cover plate when pouring post-cast strip part, it is to avoid because of rubbish during Normal practice
Debris enters the cleaning up cost and construction water of interior generation, rainwater etc. and enters drawing water and cleaning up cost for generation in basement room.
Embodiment 2：
The present embodiment overall floorage 106783m2, 2 layers of underground, 48 layers of ground, building height 180m.Index bed floor height is
3.5/3.7m, seismic fortification intensity is 7 degree, and main building framework seismic behavior is one-level, the basic a height of -10.05m of top mark, underground water
Position -1m.Main building part backplane thickness is 2500mm, and podium base plate thickness is 800mm, and plan is poured after using pouring after settlement, sedimentation
The post-cast strip that band is mainly set for the differential settlement of solution skyscraper main building and podium (need to treat that agent structure terminates and settled
It can just be poured after basicly stable).
The workflow of the present embodiment is as follows：
Post-pouring belt of outer wall advanced water-stopping part is separated into construction with external wall structure, referring to accompanying drawing 1, first pressed outer wall of basement
Artwork construction is designed, in the indoor and outdoor both sides colligation exterior wall reinforcing bar 1 (mode of overlap joint) of two outer wall of basement adjacents,
The interior outside colligation additional bar 2 of exterior wall reinforcing bar 1.
Each steel plate for sealing water 3 for installing one piece 3 × 300 (thick × wide) at the adjacent cross sectional of two outer wall of basement：Will
The half of steel plate for sealing water 3 is installed in outer wall of basement, and second half is exposed in the part of post-cast strip.Installed on steel plate for sealing water 3 thin
Eye expanded metal lath 8 is simultaneously reinforced.The wide post-cast strip parts of 800mm are reserved between two pieces of steel plate for sealing water 3, and in the outdoor of post-cast strip part
Side sets the fertile groove of rectangle foundation pit.
Pre-buried brick side form steel tie and cracking resistance reinforced mesh 7 in the fertile groove of foundation ditch：Brick side form steel tie uses 2 one
Level reinforcing bar, diameter 6mm, wall full-height direction is set to 500mm spacing, and wall bottom 300mm rises, and brick side form steel tie stretches into ground
In lower outdoor wall, meet anchoring and require；Cracking resistance reinforced mesh 7 uses one-level reinforcing bar, diameter 4mm, transverse and longitudinal spacing 150mm.
After after outer wall of basement concrete curing and form removal, build advanced water-stopping part brick side form 6 by laying bricks or stones in the fertile groove of foundation ditch, press
Masonry panel requirement：Design of Masonry Structures GB50003-2001.The construction parameter of brick side form 6 is：Post-cast strip is compared in empty both sides in mould
Wide 300mm, from outer wall of basement distance 300mm.
The highly super 4m of wall sets and sets one of beam at construction waist rail (building one of construction waist rail by laying bricks or stones at the high every 4m of wall), wall top
Concordant top plate suitable for reading, beam is wide with wall.In the wall corner of brick side form 6, (building by laying bricks or stones) constructional column 5 is set：The same wall thickness of sectional dimension.
The outdoor side of brick side form is painted with cement mortar, sets attached in the junction of the fertile groove of foundation ditch and outer wall of basement
Plus waterproof roll 4, the fertile groove both sides of foundation ditch of waterproof roll 4 respectively overlap 500mm.
After outer wall of basement binds 14 days, cut the loose concrete in post-cast strip both sides (loose concrete) and clean out, use
Cover plate shelters from the indoor side of post-cast strip part, using a high grade (volume unit of concrete strength than outer wall of basement：
MPa expansive concrete (inside mix the equivalent of micro-expanding agent 10% and replace cement)), together pours the fertile groove of foundation ditch and post-cast strip portion
Point, and complete maintenance and form removal.
The present invention uses advanced water-stop post-pouring zone, reduces the time of basement precipitation, and outer wall of basement can be inserted in advance
Backfill outside waterproof thermal-insulated and basement room, provides advantage, and be conducive to for the quickening construction of monolithic architecture engineering
The insertion in advance of tube net outside and landscape engineering, meets formation early and the macromarketing meter in construction unit's sale displaying face
Draw.
The present invention is by by poured band of outer wall of basement advanced water-stopping part (foundation ditch fertilizer groove) and outer wall of basement concrete
Construct respectively, steel plate for sealing water, brick side form steel tie and cracking resistance reinforced mesh are set, and using than outer wall of basement strong concrete
The expansive concrete for spending a high grade together pours the fertile groove of foundation ditch and post-cast strip part.Be easy to reinforcement installation, model sheetinstallat,
Reinforce and post-cast strip closure；Post-cast strip concrete formation quality is good, and antiseep effect is good.Later stage outer wall cracking, seepage are avoided, is subtracted
Few non-essential waste done over again and repaired, reduce human and material resources and financial resources, saves construction cost, improves construction quality and effect
Rate.The present invention is applied to general Construction of Civil Engineering, high-rise, construction of super highrise building, with very high production, teaching ＆ research value.
Embodiment described above is only the preferred embodiment to absolutely prove the present invention and being lifted, protection model of the invention
Enclose not limited to this.Equivalent substitute or conversion that those skilled in the art are made on the basis of the present invention, in the present invention
Protection domain within.Protection scope of the present invention is defined by claims.
Claims (10)
1. a kind of outer wall of basement advanced water-stop post-pouring zone construction method, it is characterised in that comprise the following steps：
In the indoor and outdoor both sides colligation exterior wall reinforcing bar of two outer wall of basement adjacents, tied up in the interior outside of the exterior wall reinforcing bar
Prick additional bar；
At the adjacent cross sectional of two outer wall of basement respectively install one piece of steel plate for sealing water, two pieces of steel plate for sealing water it
Between reserve post-cast strip part, and pour outdoor side with part in the rear the fertile groove of foundation ditch be set；
Pre-buried brick side form steel tie and cracking resistance reinforced mesh in the fertile groove of the foundation ditch, and build brick side form and constructional column by laying bricks or stones；
The foundation ditch is together poured using the expansive concrete of the high grade of concrete strength than the outer wall of basement
Fertile groove and post-cast strip part.
2. outer wall of basement advanced water-stop post-pouring zone construction method according to claim 1, it is characterised in that：According to receipts
Contracting post-cast strip, after carrying out the pouring again after the outer wall of basement age of concrete up to 60 days；According to pouring after settlement, treat
The basement superstructure binds carries out the pouring after 14 days and settlement stability again.
3. outer wall of basement advanced water-stop post-pouring zone construction method according to claim 2, it is characterised in that：Stop described
After water steel plate is installed and before the cracking resistance reinforced mesh is pre-buried, thin eye expanded metal lath is installed on the steel plate for sealing water.
4. the outer wall of basement advanced water-stop post-pouring zone construction method according to Claims 2 or 3, it is characterised in that：Institute
State after brick side form is built by laying bricks or stones and before the pouring, the outdoor side of the brick side form is painted with cement mortar.
5. outer wall of basement advanced water-stop post-pouring zone construction method according to claim 4, it is characterised in that：In the powder
After brush and before the pouring, additional waterproof is set to roll up in the junction of the fertile groove of the foundation ditch and the outer wall of basement
Material.
6. outer wall of basement advanced water-stop post-pouring zone construction method according to claim 5, it is characterised in that：Treat describedly
After lower room exterior wall concrete curing and form removal, then build the brick side form by laying bricks or stones.
7. outer wall of basement advanced water-stop post-pouring zone construction method according to claim 6, it is characterised in that：In the brick
After side form is built by laying bricks or stones and before the constructional column is built by laying bricks or stones, construction waist rail is poured in the fertile groove of the foundation ditch.
8. outer wall of basement advanced water-stop post-pouring zone construction method according to claim 7, it is characterised in that：By the structure
Make the wall corner that post is cast in the brick side form.
9. outer wall of basement advanced water-stop post-pouring zone construction method according to claim 8, it is characterised in that：Pouring institute
Indoor side is sheltered from when stating post-cast strip part with cover plate.
10. outer wall of basement advanced water-stop post-pouring zone construction method according to claim 9, it is characterised in that will be described
Steel plate for sealing water half is installed in the outer wall of basement, and second half is exposed in the post-cast strip part.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710399153.1A CN106978823A (en) | 2017-05-31 | 2017-05-31 | Outer wall of basement advanced water-stop post-pouring zone construction method |
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| CN201710399153.1A CN106978823A (en) | 2017-05-31 | 2017-05-31 | Outer wall of basement advanced water-stop post-pouring zone construction method |
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| CN201710399153.1A Pending CN106978823A (en) | 2017-05-31 | 2017-05-31 | Outer wall of basement advanced water-stop post-pouring zone construction method |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107338815A (en) * | 2017-09-05 | 2017-11-10 | 中国二十冶集团有限公司 | Underground engineering side wall post-cast strip comprehensive waterproof construction method |
| CN111997096A (en) * | 2020-09-01 | 2020-11-27 | 中建八局第四建设有限公司 | Raft plate and construction method of basement outer wall post-cast strip |
| CN113622464A (en) * | 2021-08-19 | 2021-11-09 | 中国十七冶集团有限公司 | Anti-cracking waterproof construction process for basement outer wall post-cast strip |
| CN114215356A (en) * | 2021-12-10 | 2022-03-22 | 中国二十冶集团有限公司 | Construction method for avoiding cold bridge generation in building entrance hall |
| CN114319436A (en) * | 2022-01-04 | 2022-04-12 | 中国建筑第八工程局有限公司 | Comprehensive construction method for double-wall connecting channel of small-space basement |
| TWI807974B (en) * | 2022-08-25 | 2023-07-01 | 潤弘精密工程事業股份有限公司 | Architecture structure unit and basement outer wall structure |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107338815A (en) * | 2017-09-05 | 2017-11-10 | 中国二十冶集团有限公司 | Underground engineering side wall post-cast strip comprehensive waterproof construction method |
| CN111997096A (en) * | 2020-09-01 | 2020-11-27 | 中建八局第四建设有限公司 | Raft plate and construction method of basement outer wall post-cast strip |
| CN113622464A (en) * | 2021-08-19 | 2021-11-09 | 中国十七冶集团有限公司 | Anti-cracking waterproof construction process for basement outer wall post-cast strip |
| CN114215356A (en) * | 2021-12-10 | 2022-03-22 | 中国二十冶集团有限公司 | Construction method for avoiding cold bridge generation in building entrance hall |
| CN114319436A (en) * | 2022-01-04 | 2022-04-12 | 中国建筑第八工程局有限公司 | Comprehensive construction method for double-wall connecting channel of small-space basement |
| CN114319436B (en) * | 2022-01-04 | 2023-07-25 | 中国建筑第八工程局有限公司 | Comprehensive construction method for small-space basement double-wall connecting channel |
| TWI807974B (en) * | 2022-08-25 | 2023-07-01 | 潤弘精密工程事業股份有限公司 | Architecture structure unit and basement outer wall structure |
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Application publication date: 20170725 |