【背景资料】某桥梁工程由某公路建设工程公司中标承建。该桥梁下部结构为 φ 1.2m 钻孔灌注桩,上部结构采用悬臂法施工。
施工过程中发生如下事件:
事件 1:施工中,根据灌注混凝土的实际情况,项目部及时采取了相应措施:
(1)考虑到灌注时间较长,在混凝土中加入缓凝剂。为避免混凝土离析,混凝土坍落度控制在 10~15cm。
(2)首批混凝土灌注后埋置导管的深度为 1.2m,在随后的灌注过程中,导管 的埋置深度为 1. 5m。
(3)在终孔之后,对孔位、孔径进行检验。
事件 2:项目经理部决心精心组织、科学施工,搞好现场技术质量管理,做了包括如下环节的工作:
(1)项目经理部由总工程师组织进行了技术交底;
(2)项目部接受导线控制点、水准控制点的桩位后,及时复测,将复测结果报勘察设计单位批准。
事件 3:施工单位为本桥配置了以下主要施工机械和设备:反循环钻机、混凝土高压泵、混凝土搅拌站、塔吊、载人电梯、悬臂式掘进机、架桥机、预应力张拉成套设备、爬模设备、 钢模板、钢护筒、挂篮设备。
事件 4:台背填筑时,采用与桥头引道一致的黏土作为台背填料,并对进场的填料进行检验, 采用水平分层填筑方法填筑,分层压实厚度 20cm,用夯压机械进行夯实,每层夯实完工后 进行自检合格并报监理工程师验收后回填下一层。
6.张先生夫妇今年均已40岁,家里存款在50万元左右。他和妻子两个人每月收入大约1万元,月花费近4000元。张先生和妻子计划在10年后退休,假设他们退休后再生存30年,且他们每年花费18万元(注:这笔钱在每年年初拿出),减掉基本养老保险和保险公司给予的保险金3万元,每年还需要15万元。假设张先生在退体前后的投资收益率均为5%。
根据以上材料回答(1)~(8)题。
【背景资料】
某新建水闸工程的部分工程经监理单位批准的施工进度计划如图13-8所示(单位:d)。
合同约定:工期提前奖金标准为20000元/d,逾期完工违约金标准为20000元/d。
施工中发生如下事件:
事件1:A工作过程中发现局部地质条件与发包人提供的勘察报告不符,需进行处理,A工作的实际工作时间为34d。
事件2:在B工作中,部分钢筋安装质量不合格,承包人按监理人要求进行返工处理,B工作实际工作时间为26d。
事件3:在C工作中,承包人采取赶工措施,进度曲线如图13-9所示。
事件4:由于发包人未能及时提供设计图纸,导致闸门在开工后第153天末才运抵现场。
【背景资料】
某施工单位在雨季承接了南方某市管道光缆线路工程,主要工作内容有:敷设12芯光缆、清刷管孔、路由复测、布放3孔塑料子管、光缆接续、中继段测试和光缆配盘。工程施工过程中,省通信管理局的质量监督人员通知项目部要到现场检查施工质量,项目经理以现场有监理人员和工期紧为由拒绝接受检查。建设单位进行工程质量专项检查时,询问项目“三检”制度的落实情况,现场质检员说,施工人员以往一直干得很好,本工程就放松了对他们工作的检查。
【背景资料】
某泵站工程主要由泵房、进出水建筑物及拦污栅闸等组成,泵房底板底高程为13.50m,泵房底板靠近出水池侧设高压喷射灌浆防渗墙,启闭机房悬臂梁跨度为1.5m,交通桥连续梁跨度8m。
该工程地面高程31.00m,基坑采用放坡开挖,施工单位采取了设置合理坡度等防止边坡失稳的措施,泵房基坑开挖示意图见图5。粉砂层渗透系数约为2.0m/d。

图5 泵房基坑开挖示意图(单位:m)
高压喷射灌浆防渗墙施工完成后,施工单位根据《水利水电工程单元工程施工质量验收评定标准-地基处理与基础工程》(SL633-2012)对高压喷射灌浆防渗墙单孔的施工质量逐孔进行了施工质量等级评定,并经过监理单位审核签字,其单元工程施工质量验收评定表(部分)如表5所示。
表5 高压喷射灌浆防渗墙单元工程施工质量验收评定表(部分)

[A] Some archaeological sites have always been easily observable—for example, the Parthenon in Athens, Greece; the pyramids of Giza in Egypt; and the megaliths of Stonehenge in southern England. But these sites are exceptions to the norm. Most archaeological sites have been located by means of careful searching, while many others have been discovered by accident. Olduvai Gorge, an early hominid site in Tanzania, was found by a butterfly hunter who literally fell into its deep valley in 1911. Thousands of Aztec artifacts came to light during the digging of the Mexico City subway in the 1970s.
[B] In another case, American archaeologists René Million and George Cowgill spent years systematically mapping the entire city of Teotihuacán in the Valley of Mexico near what is now Mexico City. At its peak around AD 600, this city was one of the largest human settlements in the world. The researchers mapped not only the city’s vast and ornate ceremonial areas, but also hundreds of simpler apartment complexes where common people lived.
[C] How do archaeologists know where to find what they are looking for when there is nothing visible on the surface of the ground? Typically, they survey and sample (make test excavations on) large areas of terrain to determine where excavation will yield useful information. Surveys and test samples have also become important for understanding the larger landscapes that contain archaeological sites.
[D] Surveys can cover a single large settlement or entire landscapes. In one case, many researchers working around the ancient Maya city of Copán, Honduras, have located hundreds of small rural villages and individual dwellings by using aerial photographs and by making surveys on foot. The resulting settlement maps show how the distribution and density of the rural population around the city changed dramatically between AD 500 and 850, when Copán collapsed.
[E] To find their sites, archaeologists today rely heavily on systematic survey methods and a variety of high-technology tools and techniques. Airborne technologies, such as different types of radar and photographic equipment carried by airplanes or spacecraft, allow archaeologists to learn about what lies beneath the ground without digging. Aerial surveys locate general areas of interest or larger buried features, such as ancient buildings or fields.
[F] Most archaeological sites, however, are discovered by archaeologists who have set out to look for them. Such searches can take years. British archaeologist Howard Carter knew that the tomb of the Egyptian pharaoh Tutankhamun existed from information found in other sites. Carter sifted through rubble in the Valley of the Kings for seven years before he located the tomb in 1922. In the late 1800s British archaeologist Sir Arthur Evans combed antique dealers’ stores in Athens, Greece. He was searching for tiny engraved seals attributed to the ancient Mycenaean culture that dominated Greece from the 1400s to 1200s BC. Evans’s interpretations of these engravings eventually led him to find the Minoan palace at Knossos (Knosós), on the island of Crete, in 1900.
[G] Ground surveys allow archaeologists to pinpoint the places where digs will be successful. Most ground surveys involve a lot of walking, looking for surface clues such as small fragments of pottery. They often include a certain amount of digging to test for buried materials at selected points across a landscape. Archaeologists also may locate buried remains by using such technologies as ground radar, magnetic-field recording, and metal detectors. Archaeologists commonly use computers to map sites and the landscapes around sites. Two- and three-dimensional maps are helpful tools in planning excavations, illustrating how sites look, and presenting the results of archaeological research.
41. |
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| → | E | → | 43. |
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【背景资料】
某溢洪道除险加固工程,控制段共5孔,每孔净宽9.0m,底板顶面高程为21.0m,闸墩顶高程32.0m,墩顶以上为混凝土排架、启闭机房及公路桥。加固方案为:底板项面增浇20cm厚混凝土,闸墩外包15cm厚混凝土,拆除重建排架、启闭机房、公路桥。为方便施工,加快施工进度,施工单位在未经复核的情况下,当现浇桥面板混凝土强度达到设计强度的70%时即拆除脚手架及承重模板。一辆载重汽车在桥上通过时,桥面发生坍塌,造成2人死亡、1人重伤,直接经济损失360万元。事故发生后,施工单位按项目管理权限及时向当地县级水行政主管部门进行了报告,并迅速组建由项目经理任指挥,项目监理机构、设计代表处的安全分管人员任副指挥的“事故现场应急处置指挥部”,负责现场应急救援和统一领导与指挥。
【问题】
背景资料
二级公路某大桥全长857m,桥宽12.5m,桥梁上部结构布置为 4×25m T梁+6×40m T梁+(45m+80m+45m)悬浇连续箱梁+6×40m T梁+4×25m T梁。
其中2#墩位于水中,河流平均水深达6m。施工期河流不通航,水面宽度240m。地质钻探资料揭示,有厚8~12m的粉质黏土覆盖层,覆盖层以下为黏土和砂性土,桩基设计采用钻孔灌注桩。
施工单位根据本桥的地质和水文情况,采用了施工栈桥、钻孔平台和钢板桩围堰等临时设施。栈桥基础施工有两个方案比选:①钻孔灌注桩基础;②钢管桩基础。
基桩施工完成后进行承台施工,承台施工工艺拟采用:①打设钢板桩围堰;②吸泥;③清底;④水下混凝土封底;⑤围堰支撑和围堰内抽水;⑥钢护筒切割;⑦立模;⑧钢筋制作安装;⑨浇筑承台混凝土。
T梁预制场位于南岸0#桥台一侧的路基上,设有3个25mT梁预制台座与4个40mT梁预制台座,结合本桥结构及地质条件,使用1台运梁平车将T梁从预制场的存梁区转运至架梁现场,采用40m双导梁架桥机首先对南岸T梁逐孔架设。待(45m+80m+45m)悬浇连续箱梁施工完毕后逐孔架设北岸各跨T梁。
T 梁预制完成后,采用两台设计起吊能力为125T的龙门吊将T梁吊运至存梁区存放。移梁前对梁体喷涂统一标识,标识内容包括预制时间、施工单位、部位名称。施工单位T梁存放做法如下:
①T梁移运至存梁区时,其混凝土强度不低于设计强度的 80%。
②T梁叠层存放时不得超过三层。
③叠层存放时下层T梁端部顶面上用加厚钢板支垫。
④T梁按吊装次序、方向水平分层叠放,标志向外,并支撑牢固。
【教育投资规划】张女士的儿子今年10岁,上小学4年级,还有8年读大学。初始有20万元进行投资,大学及研究生学习期间共计6年,目前费用合计为60万元。假设:教育金年增长率为5%,投资年回报率6%。张女士就有关问题与理财师沟通。根据以上材料,回答下列问题。