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它山堰据宋代志书记载:该地溪南沿流是山,溪北是平地,至此始有一小山虎踞岸旁,与溪南众山相对峙,孤立一座,不与其它山相接,故名它山,古时奉化江咸潮上溯到平水潭,“田不可稼,... 它山堰

据宋代志书记载:该地溪南沿流是山,溪北是平地,至此始有一小山虎踞岸旁,与溪南众山相对峙,孤立一座,不与其它山相接,故名它山,古时奉化江咸潮上溯到平水潭,“田不可稼,人渴干饮”,影响农田溉灌,王元暐在它山兴建堰坝,分江河御咸潮,引大溪之水折向东流,为民造福。

它山堰工程宏大,构筑科学。堰体横亘于樟溪之上,矗立在南山与它山的峡谷之中。它山堰全长134.4米,面宽 4.8米, 高3.05米,堰体有长2-3米、宽0.2-0.3米的条石砌成,堰身木石结构,大梅木枕卧堰中,历千年不腐。其底层为厚3.7–6.4米的粘土类碎石层。根据参与实测的水利工程专家、清华大学教授沈之良论证,它山堰具有现代科学的原理。

它的堰体向上作了五度倾斜,与堰底水平情况相比,使堰体水平抗滑能力提高一倍以上。在国内外的古水利工程上应用这一水利建筑物设计方法尚属首创。堰体采用粘土夹砂层,能有效地提高了防渗性,增加了土的抗剪强度。堰体厚度采用变厚方式,即中央厚为3.85米,朝左右两侧逐渐减薄为2米左右。堰体平面略带向上游鼓出的弧形,下游的出水处又有阶梯式护坦,可使水流向河床中心集中,减少向两岸冲刷力度。上述建筑技术都与近代的力学原理相一致,堪称奇迹。许多欧美的水利专家专程来它山堰考察,深为震惊和叹服。

它山堰建成后,发挥了巨大的作用,上游的水被堰阻拦,折向东经樟溪支流小溪流入南塘河,使鄞西七乡20余万亩农田得以灌溉。遇到洪涝时节,上游洪水漫过堰面而注入奉化江,奔向大海,减轻鄞西涝情。它既能抗旱泄洪,又能调节进入南塘河的水流量。涝时上游水流七分归江,三分入溪,旱时七分入溪,三分归江,南塘河的水自南门流入宁波城中,蓄潴日湖月湖(日湖已湮没),作为城中居民饮涤和消防之用。
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Tashan weir

据宋代志书记载:该地溪南沿流是山,溪北是平地,至此始有一小山虎踞岸旁,与溪南众山相对峙,孤立一座,不与其它山相接,故名它山,古时奉化江咸潮上溯到平水潭,“田不可稼,人渴干饮”,影响农田溉灌,王元暐在它山兴建堰坝,分江河御咸潮,引大溪之水折向东流,为民造福。

According to the local records: the creek south along the stream is a mountain, river north is flat, thus beginning a hill, the shore, confrontation and Xi Nan mountains, isolated a, is not connected with the other mountain, named it mountain, the ancient Fenghua River salt tide back to the flat pool, "Tian not grain thirst, dry drink", farmland irrigation, Wang Yuanwei built dams in its mountain, sub rivers Royal saltwater intrusion, the Daxi water bends to the East, the benefit of the people.

它山堰工程宏大,构筑科学。堰体横亘于樟溪之上,矗立在南山与它山的峡谷之中。它山堰全长134.4米,面宽 4.8米, 高3.05米,堰体有长2-3米、宽0.2-0.3米的条石砌成,堰身木石结构,大梅木枕卧堰中,历千年不腐。其底层为厚3.7–6.4米的粘土类碎石层。根据参与实测的水利工程专家、清华大学教授沈之良论证,它山堰具有现代科学的原理。

Tashan weir engineering scale, constructing the scientific. The weir spans to 樟溪 above, stands in the Nanshan mountain valleys with it. Tashan weir length of 134.4 meters, 4.8 meters wide, 3.05 meters high, the cofferdam is 2-3 meters long, 0.2-0.3 meters wide stone, wood and stone weir body structure, the big plum wood Wo Yan, Li thousand years not fu. Clay gravel layer of the bottom for the thickness of 3.7 - 6.4 meters. According to the measured water conservancy engineering expert, Professor Shen Zhiliang of Tsinghua University argues, principle of Tashan weir with modern science.

它的堰体向上作了五度倾斜,与堰底水平情况相比,使堰体水平抗滑能力提高一倍以上。在国内外的古水利工程上应用这一水利建筑物设计方法尚属首创。堰体采用粘土夹砂层,能有效地提高了防渗性,增加了土的抗剪强度。堰体厚度采用变厚方式,即中央厚为3.85米,朝左右两侧逐渐减薄为2米左右。堰体平面略带向上游鼓出的弧形,下游的出水处又有阶梯式护坦,可使水流向河床中心集中,减少向两岸冲刷力度。上述建筑技术都与近代的力学原理相一致,堪称奇迹。许多欧美的水利专家专程来它山堰考察,深为震惊和叹服。

It would make five degrees tilt up, compared with the weir floor level, the level of the cofferdam anti slide capacity more than doubled. This water conservancy building application of ancient water conservancy projects at home and abroad is the first design method. The cofferdam used clay sand layer, can effectively improve the anti permeability, increased the shear strength of soil. The weir thickness using variable thickness method, namely the central thickness of 3.85 meters, towards the left and right sides gradually thinning to 2 meters. The arc weir plane slightly upstream of drum, and a ladder type apron water downstream, the flow to the river center, reduce to the erosion intensity. The construction techniques are consistent with the principles of mechanics in modern times, the miracle. Many European and American water conservancy experts made a special trip to Tashan weir study, deeply shocked and impressed.

它山堰建成后,发挥了巨大的作用,上游的水被堰阻拦,折向东经樟溪支流小溪流入南塘河,使鄞西七乡20余万亩农田得以灌溉。遇到洪涝时节,上游洪水漫过堰面而注入奉化江,奔向大海,减轻鄞西涝情。它既能抗旱泄洪,又能调节进入南塘河的水流量。涝时上游水流七分归江,三分入溪,旱时七分入溪,三分归江,南塘河的水自南门流入宁波城中,蓄潴日湖月湖(日湖已湮没),作为城中居民饮涤和消防之用。

Tashan weir completed, played a huge role, the upstream water weir blocking, fold to the east Zhang Xi tributary Creek flows into the South River, the Yin Xi seven township 20 mu farmland can be irrigated. In flood season, flood overflow weir upstream into the Fenghua River, towards the sea, alleviate Yin Xi Lao. It can release flood waters of drought resistance, water flow and can adjust to the South River. Waterlogging upstream flow seven points to three points into the river, river, drought seven into the creek, three points to the river, South River water from the south gate into Ningbo City, Xu Zhu, Lake Lake (Lake has annihilation, Japan) as the city residents drink Di and fire use.
累死了,有些我不会呀,我英语还只是六年级水平
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