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Residents evacuated from tilting apartment buildings in Taipei’s Zhongshan District

Residents evacuated from tilting apartment buildings in Taipei’s Zhongshan District

2023-09-08

Several apartment buildings in Taipei’s Dazhi neighborhood in Zhongshan district were evacuated late Thursday after several of them were found to be tilting to one side. A nearby construction site is most likely the culprit, where the ground had not been prepared properly during the excavation stage. The city government has launched operations to fill in the collapsing ground. Initially, the construction site was to be filled with concrete, but to speed up the process it is now being filled in with sand.

Su Mo-yuan
Taipei Professional Civil Engineers Association
Sand will be faster. If you fill it in with cement, it is harder to deal with afterward. It’s also slower. If the soil isn’t good, it softens up. After it is treated, it will become hard, right? And when it’s harder, it can better withstand lateral forces that exert pressure on it. But if the improvements aren’t done as well as expected, it could compress inward.

Hsu Mao-ching
Taipei Structural Engineers Association
After all, there is a pit in the ground, which is a risk for all buildings around it. If the construction site is filled in, it would provide protection to nearby buildings and roads. As for whether the residents can return, it’s something that’s being evaluated.

Structural technicians and civil engineers are keeping a close watch on the refilling process, which was initially set to take three to four days. Now that the site is being filled, the operation is set to wrap up on Sunday.

灌漿太慢改用’’灌砂’’! 預計週六就能回填一半

2023-09-08

台北大直的連棟民宅,昨天晚間驚傳龜裂傾斜,因施工開挖未打底,釀成重大工安意外,工程單位原本灌漿搶救,不過因為灌漿速度太慢,已經改用’’灌砂’’,預計周六就能回填一半。

[[台北市土木技師公會副理事長 蘇模原]]
“砂會比較快,混凝土填完了以後,你要後續要去善後的話,難度比較高,而且它的速度比較慢,土壤不夠好就軟,然後改良好不是變硬了嗎,那硬了的話,去抵抗這個側向的,那個推擠的力量不是比較強,那因為他(廠商)改良,那個效率沒有想像中的那麼好,所以會往內擠”

[[台北市結構工程技師公會理事長 徐茂卿]]
“畢竟有一個坑在那裡,其實對四周圍建築物 ,其實是一個,不好的安全因子在裡面,把它(工地塌陷)填滿的話,不管是對道路,對四周圍建築物,都是一個進一步保障,旁邊住戶是不是要回來,我們再來做判斷”

結構技師和土木技師等專家全程緊盯,工程單位原本用灌漿補救,但至少要3到4天,就怕有變數,現在直接改填砂,最快周日就能回填完畢。

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