英语翻译Root BarrierThe primary goal of a root barrier is protec

英语翻译
Root Barrier
The primary goal of a root barrier is protecting
the watertight integrity of the roof membrane
and keeping root growth from spreading to
unintended areas.
Root barriers can vary,depending on the type
of plants.For species with aggressive root
systems,asphaltic sheets with an embedded
repelling agent,or heavy duty thermoplastic
sheets with taped or overlapping seams are
used to prevent root penetration.
For plants with less aggressive root systems,
standard duty thermoplastic sheets are
installed,again overlapped at the seams.
Insulation
The insulation of choice for a green roof in a
protected membrane assembly is Extruded
Polystyrene Insulation due to its many
favorable features and benefits including:
Excellent performance in wet applications
Dimensionally stable
High thermal value
Good compressive strength
Environmentally friendly
Drainage / Retention Elements
The delicate equilibrium between over-
watering and not providing enough water can
be challenging enough with common
houseplants.
The scale is greater on a roof top,but the issue
is the same.
Moisture retention and drainage panels that
incorporate both a reservoir system and
drainage channels are located beneath the soil,
under a filter fabric,in a well-designed green
roof.
Drainage / Retention Elements,cont’d…
The drainage and moisture retention layer plays an
essential part in storing rainwater that filters
through the growing media.
One component,which looks like an egg crate
(lower image,previous slide),works as follows:
drainage channels above and below ensure that
excess water is free to drain out of the system
(top image).The profile of the components also
provides water storage troughs that retain (or
store) additional water for use by the vegetation.
Diffusion holes through the panels allow air
circulation and water vapor to move up into the
root zone of the soil (bottom image).
In an extensive roof located in drier,hotter
climates,a moisture mat can be added to the
system assembly to absorb and store additional
usable water.
Filter Fabric
In a properly designed green roof,a filter sheet
should be placed between the growing media
and drainage/retention panels.
A geotextile filter sheet is made of non-rotting,
non-woven polypropylene fibers.
Properties of a filter fabric include high
resistance to all natural acids and alkalis,and
it should be chemically neutral.

因为我不是园林专业的所以很多专业词汇我只能意译,见谅了.
根阻拦层
根阻拦层的基本目标是保护屋顶层的防水性和完整性,以及防止植物的根长到非计划中的区域去.根阻拦层可以根据植物类型而变化.对于具有侵略性根系统的类型,采用嵌入抗生长剂的柏油层,或者高强度的带有交合或者重搭接缝的热塑层来防止根的穿透.对于弱侵略型性根系统的植物,安装标准强度的热塑层,同样是在接缝处采用重搭技术.
隔离层
对于有保护的屋顶绿化的隔离体的组配选择是加厚的聚苯乙烯因为它有很多有利的特性和好处包括：在潮湿环境应用中的良好表现、尺寸不变性、高热值、良好的压缩强度、环保
排水、保水原理
过度浇灌和浇水不足之间的精细平衡对于普通的家养植物都是一种挑战.屋顶的规模更大,但是问题是一样的.在一个设计完好的屋顶花园中,体现储水系统和排水系统的水分保留装置和排水管位于土壤下方,在过滤结构之下.
（这一行不完整）
排水和储水层在储存渗透生长介质（土壤）的雨水方面发挥重要作用.一个看着像鸡蛋筐的组件（小图,上一张幻灯片）,像如下这样工作：上方和下方的排水管路确保多余的水能被排出系统（顶端的图片）.这个组件的外形也提供了储水槽来保留（或者储存）多余的水来提供植物使用.穿透管道的浸射孔使得空气循环和水汽循环能进入土壤中的根区（如底部的图片）.对于位于更为干燥,炎热的气候的大规模屋顶花园,可以在组配时加入保湿毯来吸收和储存多余的可用的水.
过滤结构
在设计完备的屋顶花园中,一张滤网层应被设置在生长介质（土壤）和排水、储水管道之间.一张隔泥滤网层是由不腐烂,非纺织的聚丙烯纤维制成.过滤结构的性质包括对酸和碱的强抵抗性,以及它在化学成分上应是中性的.