🚜 基坑回填土方量计算器Foundation Pit Backfill Earthwork Calculator

使用说明与常见问题How-to & FAQ

「基坑回填土方量计算器」是什么？What is the Foundation Pit Backfill Earthwork Calculator tool?

计算矩形基坑放坡开挖的挖方量、回填土方量、需要的天然土方量以及余土外运或借土的虚方量，按土方体积折算系数（天然 1.00、虚方 1.30、夯实 0.87、松填 1.08）换算，适合施工预算和土方调配估算。Work out excavation volume for a sloped rectangular foundation pit, the backfill volume, the bank (natural) soil required and the loose volume to haul away or bring in, using standard bulking factors (bank 1.00, loose 1.30, compacted 0.87, loose-filled 1.08).

如何使用「基坑回填土方量计算器」？How do I use the Foundation Pit Backfill Earthwork Calculator?

输入基础底面长宽、每边工作面宽度、开挖深度和放坡系数（1:m 中的 m），再填写室外地坪以下基础及地下结构的体积。也可以选择「直接输入挖方量」。结果为估算值，正式预算请以施工图和当地定额规则为准。Enter the foundation length and width, working space on each side, depth and slope ratio m (1:m), then the volume of foundations and structures below finished grade. Or choose “enter excavation volume directly”. Results are estimates; use drawings and local quota rules for formal budgets.

土方体积折算系数是什么意思？What are the bulking factors?

同样一份土，在不同状态下体积不同：以天然密实状态为 1.00，挖出后松散的虚方约为 1.30，分层夯实后约为 0.87，松填约为 1.08（常用折算表数值）。回填计算时要把夯实后的体积换算回天然土方，运输时再按虚方计算车次。The same soil occupies different volumes: taking bank (in-situ) volume as 1.00, loose excavated soil is about 1.30, compacted fill about 0.87 and loose fill about 1.08 (standard table values). Convert compacted backfill back to bank volume, then use loose volume for trucking.

放坡系数 m 怎么取？How do I choose the slope ratio m?

m 表示坡度 1:m，即每下挖 1 米，坑边向外放出 m 米。取值与土质和开挖深度有关，一般土 0.33–0.75 不等，深基坑通常需要支护而不是单纯放坡，请以设计和规范要求为准。m means a 1:m slope: the side moves out m metres for every metre of depth. It depends on soil type and depth (often 0.33–0.75); deep pits usually need shoring instead of simple slopes — follow the design and codes.

计算结果能直接用于结算吗？Can I use the result for final accounts?

不能。本工具只做几何估算，未考虑基坑形状不规则、土质分层、含水率、沉降补偿等因素。正式预算和结算请以施工图、现场测量和当地计价规则为准。No. This is a geometric estimate that ignores irregular shapes, soil layers, moisture and settlement allowances. Use drawings, site surveys and local pricing rules for formal budgets and settlement.

「基坑回填土方量计算器」免费吗？数据会上传吗？Is the Foundation Pit Backfill Earthwork Calculator free? Is my data uploaded?

「基坑回填土方量计算器」完全免费，无需注册或安装，手机和电脑都能用；所有处理都在你的浏览器本地完成，输入的内容和文件不会上传到服务器。The Foundation Pit Backfill Earthwork Calculator is completely free with no sign-up or install and works on phones and desktops; everything runs locally in your browser and nothing you enter is uploaded.