首页/ 题库 / [问答题]降低地下水位有哪些施工要求?的答案

降低地下水位有哪些施工要求?

问答题
2022-02-23 16:17
查看答案

正确答案

降低地下水位的施工要求如下:
1.开挖低于地下水位的基坑(槽)、管沟和其他挖方是,应根据当地工程地质资料,挖方尺寸和防止地基上结构遭受破坏等,用集水坑降水、井点降水或两者相结合等措施降低地下水位;采用正铲挖掘机、铲运机、推土机等挖土时,应使地下水位经常低于开挖地面不少于0.5m;
2.采用集水坑降水时,应符合下列规定:
A、根据现场土质条件,应能保持开挖边坡的稳定;
B、集水坑应与基础底边有一定的距离,防止地基遭受破坏;
C、土层中如有局部流沙现象,应采取防治措施;
3.采用井点降水时,应根据含水层土的类别及其渗透系数要求降水深度、工程特点等选择适当的井点装置;当含水层的渗透系数小于5m/昼夜宜选用轻型井点和喷射井点装置;当含水层的渗透系数大于20m/昼夜宜选用管井井点装置当含水层的渗透系为5~20m/昼夜上述井点装置均可选用。
4.降水前,应考虑在降水影响范围内的建筑物和构筑物可能产生附加沉降、位移或供水井水位下降,应采取防护措施。在降水期间,应定期进行沉降和水位观测并记录;
5.采用真空泵时,管路系统应严密,确保无漏水现象,经实验后方可使用;
6.井点降水的其他施工要求,可按照国家现行标准的有关规定及地基与基础工程的施工技术要求进行。


试题解析

相关题目
boost的意思是:help or encourage to increase or improve
eloquent的意思是:fluent or persuasive in speaking or writing

A campus emergency ______ occur at any time of the day or night, weekend, or holiday, with little or no warning.

A cabinet or space containing the controls or valves for the fixed firefighting system must be().
Mainly east 3 or 4 partly cloudy to overcast occasional rain()slowly south moderate or good.
()any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local quarantine officer must be notified immediately.
Should any case or suspected case of quarantinable disease,or any case of eruptive disease or any death be discovered,the local Quarantine Officer must be()immediately.
Masters are()solely responsible for all damages or accidents of whatever kind resulting from the navigating or handling of their vessels by day or by night.
If he is a common carrier,he is absolutely responsible to the owner of the goods carried ()any loss or damage to them unless caused by an Act of God or the Queen’s enemies,or the inherent vice in the goods themselves,or the negligence of the owner of the goods,or a general average sacrifice.
系统中雷达状态包括Unknown、Operational(or ON)、Failed(or OFF)、Detached。
管理(或非浮动)价格Administered(or inflexible) prices
Owners are to be responsible for loss of or damage to the goods or delay in delivery of the goods only in case the loss,damage or delay has been caused by the improper or negligent stowage of the goods.This means that().
The carrier is liable for loss of or damage to the goods or delay in delivery caused by fire,()the claimant proves that the fire arose from fault or neglect on the part of the carrier,his servants or agents.
Shutdown price(or point,or rule) 停业价格(或停业点、停业原则)
翻译:With Average or With Particular Average(WA or WPA)()
在人工降低地下水位施工的方法中,用真空井点方式使地下水位下降的优点有()。
在人工降低地下水位施工的方法中,用真空井点方式使地下水位下降的优点有(  )。
人工降低地下水位施工技术中,真空(轻型)井点具有的优点不包括()。
降低地下水位有哪些施工要求?
()shall be liable for loss of and damage to the Vessel and/or goods arising or resulting from inaccuracies in stating the description,quantity,weight,measurement or contents.
广告位招租WX:84302438

免费的网站请分享给朋友吧