每根模管要几袋？

直径 30 厘米、深 1.2 米约需六袋 80 磅装；直径 20 厘米同深度约三袋。按数量相乘后再加 10%。

露台基础用多大直径？

25–30 厘米可覆盖多数住宅露台基础，但正确尺寸取决于受荷面积、土壤承载力和荷载大小，不宜凭感觉决定。

基础要做多深？

必须低于当地冻土线，从南方的零深到北方的 1.2 米以上不等。高于冻深的基础每年冬天都会被顶起，并带动整个结构。

浇筑后要拆掉纸模吗？

凝固后拆除露出地面的部分，因为纸板吸水且外观不佳。埋在地下的部分可以保留，它会无害降解。

圆形基础需要配筋吗？

多数规范要求承受结构荷载的墩基配筋，通常为两到四根竖筋加箍筋，顶部再预埋锚栓或柱脚件。

圆模管计算器

计算圆形柱模所需的混凝土量：露台基础、门廊柱和墩基的立方码数与袋数。

公式与数据最后核对于 2026年8月6日 — Cosyslabs

输入

模管直径(in)

模管高度(ft)

模管数量

损耗百分比

每立方码单价（选填）($)

Result

Concrete needed

0.77 yd³

Per tube

3.14 ft³

80-lb bags: 35
60-lb bags: 47
Tubes: 6 × 12.0" × 4.0 ft
Total volume: 20.7 ft³

Waste default: 10% — 10% 用于扩底基础的喇叭口以及留在搅拌机和手推车中的混凝土。

Diagram

Estimates only. Verify with a licensed contractor or supplier before purchasing. Rough Estimator! is not responsible for shortages, overages, or material variances. See our methodology for formulas and sources.

公式

单管体积 ft³ = π × (直径 in ÷ 12 ÷ 2)² × 高度 ft

参考资料

Measure what the tool asks for
This calculator works from 模管直径 in in, 模管高度 in ft and 每立方码单价（选填） in $. Measure the finished area you are covering, not the material — an estimate is only as good as the dimensions you feed it.
What it does with those numbers
单管体积 ft³ = π × (直径 in ÷ 12 ÷ 2)² × 高度 ft Every figure on the page comes out of that one expression, so you can check it by hand.
Why it adds 10% waste
10% 用于扩底基础的喇叭口以及留在搅拌机和手推车中的混凝土。
Where the numbers come from
The constants are taken from IRC R403 — Footings, American Wood Council DCA 6 — Deck footing sizing and ACI 318 — Building Code Requirements for Structural Concrete, linked in full below. If a figure here disagrees with your supplier's spec sheet, use the spec sheet — it describes the product you are buying.
What this will not tell you
This is a material takeoff, not a bid. It does not price labour, permits, delivery, equipment hire or site preparation, and it assumes a straightforward layout. Complex cuts, difficult access and awkward shapes all cost more than the geometry suggests.

Related tools & materials

Calculators

Don't forget

圆形柱模
钢筋
柱脚件
锚栓
底部碎石

Also useful

Astrilio Property Calculators

常见问题

用圆柱公式：π 乘半径平方乘高度。直径 30 厘米、深 1.2 米的模管为 3.14 立方英尺，约六袋 80 磅装。

Ad space

Cite this page

Cosyslabs. (2026). 圆模管计算器. Rough Estimator!. https://roughestimator.com/zh/sonotube-calculator

Embed on your site

Free for any site — attribution appreciated.

<iframe src="https://roughestimator.com/zh/sonotube-calculator?embed=1" title="圆模管计算器" width="100%" height="640" style="border:0;border-radius:12px" loading="lazy"></iframe>