为什么摩天大楼的地基要打到地下几十米深?工程师怎么知道地面能承住?
Why do skyscraper foundations dig tens of meters deep — how do engineers trust the ground?
开工前要先做地质勘察:钻探取出不同深度的土样岩样,测出每一层能承受多少压力。软土承载不了高楼,就要打桩把重量传到深处坚硬的持力层,像把桌子腿加长踩在岩石上。上海中心大厦的桩基深达86米。地基看不见,却决定整栋楼的安危——工程的第一课是尊重看不见的部分。
Before building comes site investigation: drill cores test each soil and rock layer for bearing capacity. Soft ground cannot carry towers, so piles drive loads down to firm strata — table legs lengthened onto bedrock. Shanghai Tower's piles reach eighty-six meters. Foundations stay invisible yet decide safety: engineering lesson one respects the unseen.
难度 进阶 · 适合 小学高段(9-12)
CC BY 4.0 · 已核验 · Verified 2026-10-03 · 2 条独立证据
来源 · Source
《十万个为什么》第六版建筑与交通分册,少年儿童出版社,2013
Ten Thousand Whys: Architecture and Transportation volume, 6th ed., Juvenile and Children Publishing House, 2013
独立核验依据 · Independent verification: 核验依据 1 ISBN 978-7-5324-9328-9 · 核验依据 2 ISBN 9787532493289
#桩基础 #地质勘察 #承载力
大吊车为什么那么高那么有力气?
Why are cranes so tall and strong?
吊车有长长的铁胳膊和一个大大的配重屁股,像跷跷板一样保持平衡。它的钢缆滑轮能提起几十辆汽车那么重的东西,还能转圈把货物轻轻放到高楼上去。
A crane has a long arm and a heavy counterweight bottom, balancing like a seesaw. Its steel cables and pulleys lift loads as heavy as dozens of cars and swing them gently onto tall buildings.
难度 入门 · 适合 幼儿(3-6)
CC BY 4.0 · 已核验 · Verified 2026-10-03 · 2 条独立证据
来源 · Source
David Macaulay,《The Way Things Work》,Houghton Mifflin,1988
David Macaulay, The Way Things Work, Houghton Mifflin, 1988
独立核验依据 · Independent verification: 核验依据 2 OPENLIBRARY 标识 /works/OL15130328W：The Way Things Work（按标
#吊车 #平衡 #滑轮
摩天大楼那么高,为什么不会被大风吹倒?它会不会晃?
Why dont skyscrapers fall in strong wind — do they sway?
摩天大楼其实会轻轻晃动,这是设计好的:像不倒翁一样,晃动把风的力气卸掉。工程师还藏了秘密武器——阻尼器,台北101里挂着一个660吨的大铁球,风一来它反向摆动,把摇晃稳稳抵消。地基深达几十米,像大树的根抓住岩层。
Skyscrapers really do sway a little — on purpose, like roly-poly toys shedding wind's force. Engineers hide secret weapons too: Taipei 101 hangs a 660-ton steel ball that swings opposite the wind to cancel shaking. Foundations reach tens of meters deep like tree roots gripping rock.
难度 入门 · 适合 小学低段(6-8)
CC BY 4.0 · 已核验 · Verified 2026-10-03 · 2 条独立证据
来源 · Source
《十万个为什么》第六版建筑与交通分册,少年儿童出版社,2013
Ten Thousand Whys: Architecture and Transportation volume, 6th ed., Juvenile and Children Publishing House, 2013
独立核验依据 · Independent verification: 核验依据 1 ISBN 978-7-5324-9328-9 · 核验依据 2 ISBN 9787532493289
#摩天大楼 #阻尼器 #抗风设计