中新网上海3月18日电(张亨伟)据“上海网络辟谣”微信公众号消息，最近，网上有一种说法：国内最高建筑“上海中心大厦建筑寿命只有50年”，理由是：浦东是冲积平原，土壤松软，同时上海中心在建设时抽取地下水，导致现在陆家嘴出现下沉，因此在50年后，上海中心可能会面临被拆除的风险。

经上海辟谣平台核查发现，相关说法完全经不起推敲。

图为上海中心(左)、金茂大厦(中)、环球金融中心(右)(资料图)。中新网记者 张亨伟 摄

据悉，上海中心大厦始建于2008年。参考的是《建筑结构可靠度设计统一标准(GB50068-2001)》，该标准规定，“临时性结构的设计使用年限为5年；易于替换的结构构件的设计使用年限为25年；普通房屋和构筑物的设计使用年限为50年；纪念性建筑和特别重要的建筑结构的设计使用年限为100年。”房屋建筑结构的设计使用年限不应低于该标准。超过设计使用年限以后，不代表房屋不能继续使用，而是需要定期检查和维护，以确保正常使用。

上海中心大厦属于特别重要的建筑结构，按规定其设计使用年限不低于100年。因此“50年后，上海中心可能会面临被拆除的风险”这种说法本身就站不住脚。

同时，也有网友关心：上海是冲积平原，在这上面建造超高层建筑，“站”得稳吗？

其实，早在上海中心大厦建设之初，工程师们就对这个问题进行过深入研究：在建设规划初期的地质勘探过程中，上海岩土工程勘察设计院有限公司的工程师们将千米勘探钻机打入地下288米的土壤中，钻头每到达一层土壤层，便将土壤样品提取到地面，并不断重复这一过程。钻头一直钻到地下288米的基岩层。地质勘探报告显示，在地下288米深处有一层1.1亿年历史的花岗岩层，它被称为“上海中心大厦的根”，目前花岗岩层样本正陈列在上海中心大厦B1层观光展区。

此外，工程师们又进行了一系列繁琐而系统的试验，最终发现位于地下80-86米的第9层土壤层最适合作为大厦核心区桩基的持力层。该土壤层上部粗沙砾含量较高，中、下部黏性土较多。终于，上海中心大厦的桩基有了“家”。

确定好土壤持力层后，接下来是桩基的选择。常规钻孔灌注桩单桩设计承载力一般在600吨左右，极限承载力不超过800吨。但上海中心主楼覆盖面积有限，最多只能布置1000根左右的基桩。经过计算，每根的承载能力至少要达到1000吨。因此，传统的钻孔桩无法承受85万吨的上海中心大厦。

为提高单桩的承载能力，工程师们又找到了创新的解决方案——后注浆钻孔灌注桩技术。工程师们在钢筋网箱底部和两侧预埋3根注浆管，在常规混凝土桩浇筑后进行高压注浆，浆液从桩的最下端挤出孔底部的沉积物，填充桩底部的裂缝，使单桩的承载能力显著提高。

为了验证其有效性，2008年2月-5月，工程师们花了4个月时间进行现场桩型选择试验。数据显示，常规钻孔灌注桩经过后注浆技术后，单桩极限承载力可以从800吨提高到3100吨，为支撑近85万吨的建筑重量铺平了道路。

最终，上海中心大厦采用了这种新的桩基技术。第9层土壤层作为持力层，加上单桩3100吨的极限承载力，保证了上海中心大厦稳稳伫立在黄浦江边。目前，上海中心大厦不仅是我国最高的超高层建筑，也是世界上建造于深厚软土地基上的最高建筑物。(完)

新闻译文：

China News Network, Shanghai center, March 18 (Zhang Hengwei) according to the news on the WeChat official account of "Shanghai Network Refuses Rumor", there is a statement on the Internet recently that the life of the highest building in China is only 50 years. The reason is that Pudong is an alluvial plain with soft soil. At the same time, Shanghai center is pumping groundwater during construction, which has led to the subsidence of Lujiazui. Therefore, 50 years later, Shanghai center may face the risk of being demolished.

After verification by the Shanghai debunking platform, it was found that the relevant statements cannot withstand scrutiny at all.

The picture shows the Shanghai center (left), Jinmao Tower (center), and the World financial Center (right) (information picture). Photo by Zhang Hengwei, journalist from China News Agency

It is reported that the Shanghai center Building was built in 2008. The reference is the Unified standard for Reliability Design of Building Structures (GB50068-2001), which stipulates that "the design service life of temporary structures is 5 years; the design service life of easily replaceable structural components is 25 years; the design service life of ordinary houses and structures is 50 years; and the design service life of commemorative buildings and particularly important building structures is 100 years." The design service life of the building structure should not be lower than this standard. After exceeding the designed service life, it does not mean that the house cannot continue to be used, but rather requires regular inspection and maintenance to ensure normal use.

The Shanghai center Building is a particularly important building structure, and its design service life is not less than 100 years according to regulations. Therefore, the statement that "in 50 years' time, the Shanghai center may face the risk of being demolished" itself does not hold water.

At the same time, some netizens are also concerned: Shanghai is an alluvial plain, and building super high-rise buildings on it can "stand" steadily?

In fact, as early as the beginning of the construction of Shanghai center Building, engineers had conducted in-depth research on this issue: during the geological exploration process at the beginning of the construction planning, engineers of Shanghai Geotechnical Engineering survey and Design Institute Co., Ltd. drove a kilometer exploration rig into 288 meters of soil underground. Every time the drill bit reached a soil layer, soil samples were extracted to the ground, and the process was repeated continuously. The drill bit drilled all the way to the bedrock layer 288 meters underground. According to the geological exploration report, there is a 110 million year old granite layer 288 meters deep underground, which is called "the root of Shanghai center Building". At present, the samples of granite layer are displayed in the B1 sightseeing exhibition area of Shanghai center Building.

In addition, engineers conducted a series of tedious and systematic tests and ultimately found that the 9th soil layer located 80-86 meters underground is the most suitable bearing layer for the pile foundation in the core area of the building. The content of coarse gravel in the upper part of the soil layer is relatively high, and there is more cohesive soil in the middle and lower parts. Finally, the pile foundation of Shanghai center Building has a "home".

After determining the soil bearing layer, the next step is to select the pile foundation. The design bearing capacity of a conventional bored pile is generally around 600 tons, and the ultimate bearing capacity does not exceed 800 tons. However, the main building of Shanghai center has a limited coverage area, and only about 1000 foundation piles can be arranged at most. After calculation, the bearing capacity of each unit must reach at least 1000 tons. Therefore, the traditional bored piles cannot bear the 850000 ton Shanghai center Building.

To improve the bearing capacity of single piles, engineers have found an innovative solution - post grouting drilling and grouting pile technology. Engineers pre embed three grouting pipes at the bottom and both sides of the steel mesh box, and perform high-pressure grouting after pouring the conventional concrete pile. The slurry squeezes out the sediment at the bottom of the hole from the bottom of the pile, filling the cracks at the bottom of the pile and significantly improving the bearing capacity of the single pile.

In order to verify its effectiveness, engineers spent four months conducting on-site pile type selection tests from February to May 2008. Data shows that after using post grouting technology, the ultimate bearing capacity of a conventional drilled pile can be increased from 800 tons to 3100 tons, paving the way for supporting a building weight of nearly 850000 tons.

Finally, Shanghai center Building adopted this new pile foundation technology. The 9th soil layer is used as the bearing layer, and the ultimate bearing capacity of a single pile is 3100 tons, which ensures that the Shanghai center Building stands steadily beside the Huangpu River. At present, the Shanghai center Building is not only the highest super high-rise building in China, but also the highest building built on deep soft soil foundation in the world. (End)

重点词汇

• 辟谣 Refute a rumor ; deny a rumour ; refute a rumour ; refute slanders

• 上海中心大厦 Shanghai Tower ; Shanghai Center ; Shanghai Center Tower

• 浦东 Pudong ; Shanghai ; PVG

• 冲积平原 alluvial plain

• 可能会 may ; may be ; likely

• 推敲 deliberate ; weigh ; work through

• 金茂大厦 Jin Mao Tower ; Jinmao Building

• 金融中心 financial center

• 资料图 Data map ; Getty Images ; melissa ; funky monkey babys

• 建筑结构 building structure

句子成分分析：

In order to verify its effectiveness, || engineers spent four months conducting on-site pile type selection tests 

[from February to May 2008].

句子语法结构详解：

(spent 为 spend 的过去式。)

* in order 引导状语从句。
* to verify 为不定式。
* engineers 开头为陈述句。
* spent 为谓语，采用一般过去时。
* conducting 为现在分词，作状语。
* its 为物主代词。

句子相关词汇解释：

Phrase:

Vocabulary:

句子成分分析：

[However], the main building (of Shanghai center) has a limited coverage area, || and [only] about 1000 foundation 

piles can be arranged [at most].

句子语法结构详解：

(has 为 have 的第三人称单数形式。)

* has 为谓语，采用一般现在时。动词采用第三人称单数形式。
* and 为并列连词，连接并列句。
* arranged 为谓语，采用被动语态。
* can 为情态动词。be 为助动词。the 为定冠词。a 为不定冠词。

句子相关词汇解释：

Phrase:

Vocabulary:

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http://www.fcdict.com/creator
http://www.fcdict.com/habitants
http://www.fcdict.com/monkfishes
http://www.fcdict.com/apprehensive
http://www.fcdict.com/accomplishes
http://www.fcdict.com/Sinhalese
http://www.fcdict.com/feed the kitty
http://www.fcdict.com/lay of the land
http://www.fcdict.com/surmise
http://www.fcdict.com/stilted
http://www.fcdict.com/unenviable
http://www.fcdict.com/hoodooing
http://www.fcdict.com/boughpot
http://www.fcdict.com/ramekin
http://www.fcdict.com/interposes
http://www.fcdict.com/be well off
http://www.fcdict.com/etta
http://www.fcdict.com/birle
http://www.fcdict.com/Mm

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