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Ç6
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Ç6谈现场土方压实试验工作对土方回填施工质量的保证MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
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Ç6云南城市建设监理有限公司 周伟MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6——— 来源:《云南建设监理》MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
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Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
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Ç6笔者监理了云南省大型戒毒劳教所土石方工程,通过土方回填前的现场压实试验工作,保证了大型土方回填的工程质量。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
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Ç6中华人民共和国国家标准GB50202-2002《建筑地基基础工程施工质量验收规范》MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6第六章土方工程中6.3条土方回填对土方回填作了4条规定,其中6.3.3条:填方施工过程中应检查排水措施,每层填筑厚度、含水量控制、压实程度。填筑厚度及压实遍数应根据土质,压实系数及所用机具确定。如无实验依据,应符合表6.3.3的规定。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
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Ç6表6.3.3MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
填土施工时的分层厚度及压实遍数MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6压实机具 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 分层厚度(mm) MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 每层压实遍数 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 |
平碾 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 250~300MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 6~8MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 |
振动压实机 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 250~350MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 3~4MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 |
柴油打夯机 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 200~250 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 3~4MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 |
人工打夯 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | ﹤200MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 3~4MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 |
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6在条文说明中:填方工程的施工参数如每层填筑厚度、压实遍数及压实系数对重要工程均应做现场实验后确定,或由设计提供。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6笔者认为对于大型及重要工程,必须按照该规范执行。笔者就自己监理的上述民用建筑土方回填工程,通过现场压实实验,来说明场地回填土方工程中压实实验的重要性,供参考。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
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Ç6回填土的质量主要由现场回填土的压实密度来体现。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
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Ç6土方回填前应清除基底的垃圾、树根等杂物,抽除坑穴积水、淤泥,验收基底标高。如在耕植土或松土上填方,应在基底压实后再进行,一般现场取土样,进行干密度实验,合格后进行回填土施工,对于软弱层,应根据设计要求进行换填处理后再进行施工。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
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Ç6回填方土料应满足设计要求,对于需挖填场地,应立足于现场挖出的土料。所使用的土料必须现场取样,对土性变化大的场地,需划分出各自的区域,分别取样测定土样的最大干密度与最优含水量,回填时需分开回填,不能混淆。回填土前需测定土的含水量,如含水量大,需进行晾晒,降低含水量。如含水量小,需人工洒水,增加含水量,保证含水量接近最优含水量。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
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Ç6施工场地地质情况说明:场地为残、坡积红粘土,分布均匀,厚度1~20米,变化较大,下伏灰岩,岩性变化不大,红粘土带弱膨胀性。挖方量约25万方,填方约22万方,石方约3万方,挖填基本平衡。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
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Ç6一、试验目的:MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6测定土的含水量与质量密度的关系,从而确定该土的最优含水量与相应的压实干密度,根据击实试验确定的最大干密度之间的关系,掌握土方回填的压实遍数,给场平工作施工创造条件,以便保证土方压实的质量。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6二、试验内容:MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6本试验场地选在回填范围内,占地面积240m2, 试验场地根据工程的土方不同来源分为三部分(土样一、土样二、土样三)。试验日期为一天,参加人员为建设单位5人,监理单位4人,施工单位5人,共计14人。试验方法采用推土机找平,虚铺土厚度35cm,TY14型拖式振动碾压机,压实遍数4遍(振动碾4遍);6遍(平碾2遍,振动碾4遍)和8遍(平碾2遍,振动碾6遍)三次进行,其中铺土也是依次进行,根据土样来源和压实变数不同共取土样75件(其中在做试验时废了一件),实际试验土样74件。待三层土样都根据不同的压实遍数全部压实后又垂直取样18件(每个土样取6组),由于在取样过程中废了一件,实际试验土样17件,整个过程共做土工试验92件,取样均采用200cm3环刀进行。74件土样含水量与干密度关系见下表:MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6振动碾压4遍(土样一)MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6环刀号 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 含水量 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 干密度 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 12#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 34.0MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.388MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 14#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 34.6MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.382MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 2#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 29.0MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.45MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 18#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 30.4MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.419MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 13#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 30.1MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.422MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 振动碾压4遍(土样二)MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6环刀号 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 含水量 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 干密度 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 33.5MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.416MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 8#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 31.6MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.413MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 15#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 31.8MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.373MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 4#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 30.3MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.443MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 11#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 34.3MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.370MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 |
振动碾压4遍(土样三) MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6环刀号 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 含水量 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 干密度 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 8#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 35.0MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.412MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 34.6MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.393MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 14#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 34.5MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.413MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 11#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 33.6MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.419MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 振动碾压6遍(土样一) MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6环刀号 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 含水量 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 干密度 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 12#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 35.9MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.372MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 14#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 32.5MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.408MÞµ{¥ªä²bbs.3c3t.com¡`Щ
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Ç6 | 2#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 31.8MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.442MÞµ{¥ªä²bbs.3c3t.com¡`Щ
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Ç6 | 18#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 34.9MÞµ{¥ªä²bbs.3c3t.com¡`Щ
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Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 29.2MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.488MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 13#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 29.4MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.474MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 8′#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 32.6MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.420MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 18′#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 32.7MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.416MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 4′#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 33.0MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.413MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 11′#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 31.4MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.462MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 13′#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 33.7MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.372MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 |
振动碾压8遍(土样三)MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6环刀号 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 含水量 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 干密度 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 7#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 36.5MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.396MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 8#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 35.9MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.341MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 3#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 34.6MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.394MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 17#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 35.7MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.396MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 11#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 35.2MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.406MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 17′#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 31.4MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.419MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 5′#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 32.5MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.372MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 10′#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 34.4MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.382MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 12′#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 34.1MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.375MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 14′#MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 32.1MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | 1.412MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 | MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 |
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6三、试验情况:MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç61、所试验的粘土经环刀取样试验,干密度随含水量增加而减少。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç62、所试验的粘土天然含水量偏大,所做点处于最佳含水量锋值的右侧。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç63、从试验来看,碾压6、8遍所做点相对集中,离散点较少。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç64、从挖坑取样看,在第3层碾压后几处厚度有35cm,底部所取土样相对容易,眼观察土体稍松。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç65、挖坑取样中,有结合层分离情况。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç66、同层碾压中,光滑面结合处有水平分层现象。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç67、实验碾压不均匀,有的地方碾压遍数失真及实验操作不规范,导致少量数据在相同含水量的情况下,干密度相差偏大。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç68、垂直取样实验情况与分层取样实验基本一致,后续碾压对下层密实度基本无影响,不会增加下层的密实度。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç69、虚铺土厚度可按35cm实施。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6四、结论:MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç61、本场地回填土质天然含水量偏大,回填时要减少含水量,含水量以击实实验的最优含水量为准,施工方要采取保证含水量措施。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
2、建议施工回填碾压遍数不能少于6遍,8遍不经济。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç63、需铺土厚度不大于35cm。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç64、每层结合层较光滑面处需采取抛毛处理。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç65、实验室操作人员要持证上岗,避免、减少实验误差。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6回填土施工时,施工、监理严格按实验结论指导施工:虚铺土厚度35cm,使用相同设备静压2遍,振动碾4遍(含抛毛处理的凸碾1遍),基层洒水后碾压,开挖回填土碾压前测含水量,分区域晾晒施工,试验员执证上岗,严格按实验规程操作,保证了回填土质量。后期基础施工时,人工开挖较难。特别是边坡较好:回填密实,容易成形,经过两个雨季后,5米高的边坡没有被雨水冲刷,保持了较好的形状,回填土施工受得了建设方的好评。MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6参考书目:中华人民共和国国家标准GB50202---2002《建筑地基基础工程施工质量验收规范》MÞµ{¥ªä²bbs.3c3t.com¡`Щ
Ç6
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Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
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Ç6 MÞµ{¥ªä²bbs.3c3t.com¡`Щ
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Ç6
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Ç6