人防工程中桩基工程造价怎么算,定额都不会套、你让我怎么算?
推荐回答(1个)
桩基工程定额工程量的计算
(与陕西省消耗量定额配套)
一、定额项目设置及说明
1、本章定额共包括七部分112个子目,修改子目13个项目,补充定额30个项目,定额项目组成见表
2、各类桩综合考虑了不同的土壤类别、不同的机械型号与规格、桩断面等因素,除另有规定者外,均不得换算。
3、定额中综合考虑了预制桩的喂桩及送桩的因素,使用中亦不再作调整。
4、砼灌注桩将桩的成孔和灌注砼分为两个定额项目,使用时要注意分别套用相关定额子目。
5、灰土井桩(2-64,2-65)为综合定额,使用时要注意定额表上边的工作内容。
6、修改子目:走管式打桩机打孔(2-20~2-22)螺旋钻机成孔和重锤夯扩(2-23~2-25),CFG桩成孔(2-61~2-63),泥浆制作、运输(2-97~2-100)见补充定额P8
7、重锤夯扩定额中填充材料,应按补充定额下面的脚注进行换算。补充定额P9
8、CFG桩修改为单项定额,成孔和砼灌注应分开执行。
9、基坑支护脚手架执行十三章15m以内外脚手架子目(13-1)。
10、机械进出场按第十六章计算。
二、主要项目工程量计算
1、预制钢筋混凝土桩
预制钢筋砼桩应分别列项计算制桩(分砼、钢筋、模板)、运桩、打桩或压桩等内容,应分别套用相应各分部定额。其中制桩套用第四章,运桩套用第六章,打桩或压桩、接桩则执行本章定额。
①预制钢筋砼桩制作工程量(定额第四章)
砼、模板工程量:V=图纸计算的桩体积×1.02
钢筋工程量:G=按图纸计算的钢筋重量×1.02
②预制钢筋砼桩运输工程量(定额第六章)
V=图纸计算的桩体积×1.019
③打(压)入预制钢筋砼桩工程量(本章定额)
V=图纸计算的桩体积×1.015
*打(压)入预制钢筋混凝土桩按设计桩长加桩尖长度乘以桩截面积以“m3”计算,定额的消耗量已考虑了桩尖虚空部分的因素。
图纸计算的桩体积=桩断面积×桩长(包括桩尖)×根数=桩断面积×总桩长(包括桩尖)
桩断面积、桩长、根数可直接从清单中知道
④接桩(一般15M以上)
型钢焊接接桩按接头个数计算
⑤凿桩头:余桩长度在0.5m以内的为凿桩,0.5m以外的为截桩,同时还应计算凿桩。凿桩头按体积计算
2、灌注桩
分别按成孔、钢筋笼、灌注砼(现场搅拌和商品砼)和泥浆外运、凿桩头及石渣外运等内容套定额或计算
)成孔(2-20~2-60):
①走管式打桩机、螺旋钻机、回旋钻机、冲击钻机、锅锥钻机、旋挖钻机成孔以设计入土深度计算
L=桩底标高-自然地坪标高(或坑底标高)
②回旋钻机、冲击钻机成孔深度是指护筒顶至桩底的深度,同一井深内分不同土质套用不同子目,不论其所在的深度如何,均执行总孔深子目。
2)灌注砼(2-101~2-108):
①钻孔桩灌注砼以设计桩长(含桩尖)加0.5m乘以断面面积计算。
V=桩的断面积×(设计桩长+0.5m)
桩的断面积、设计桩长可直接在清单项目特征和内容中得到
②人工挖孔桩灌注砼以设计图示桩长乘以断面,以m3计算
V=桩的断面积×设计桩长
③走管式打桩机成孔后,先埋入预制砼桩尖,在灌注砼者,桩尖按有关章节另行计算。
a预制桩尖按实体积计算套第四章子目
b灌注砼V=断面积×桩长(从桩尖顶面算起)
3)砼灌注桩的钢筋笼制作,以设计图纸量净用量计算套第四章子目,钢筋笼安装按钢筋笼的重量计算执行(2-111),即重量同清单钢筋重量
4)凿桩头和泥渣外运:定额P54十一条
3、夯扩桩按夯扩后的体积计算。填充材料,应按补充定额下面的脚注进行换算。补充定额P9
4、CFG桩(2-61~2-63已修改,成孔和灌注砼分开)按设计桩长乘以桩截面积以m3计算。
5、灰土挤密桩按设计桩长加0.25m乘以桩截面积以m3计算。
V=桩的断面积×(设计桩长+0.25m)
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