03深井井點(diǎn)降水工程.doc

一、 施工準(zhǔn)備
1、 材料
無砂混凝土管(濾管)、濾網(wǎng)、2～4mm砂礫混合料、潛水鉆機(jī)、泥漿車、泥漿泵、清水泵、潛水泵等。
2、 作業(yè)條件
（1） 現(xiàn)場三通一平已完成。
（2） 地質(zhì)勘測資料齊全，根據(jù)地下水位埋深、土層分布和基坑放坡系數(shù)，確定井點(diǎn)位置、數(shù)量和降水深度。
二、 工藝流程
井點(diǎn)測量定位→挖井口→安護(hù)筒→鉆機(jī)就位→鉆孔→回填井底砂墊層→吊放井管→回填井管與孔壁間的礫石過濾層→洗井→井管內(nèi)下設(shè)水泵、安裝抽水控制電路→試抽水→降水井正常工作→降水完畢拔井管→封井
三、 操作要點(diǎn)及技術(shù)要求
1、 定位：根據(jù)設(shè)計(jì)的井位及現(xiàn)場實(shí)際情況，準(zhǔn)確定出各井位置，并做好標(biāo)記。
2、 采用循環(huán)鉆成孔，孔徑一般為600～800mm，用泥漿護(hù)壁，孔口設(shè)置護(hù)筒、，以防孔口

First, construction preparation
1, material
No sand concrete pipe (filter tubes), filter, 2 ~ 4mm gravel mixture, diving rig, mud truck, mud pump, water pump, submersible pumps.
2, working conditions
(1) Field leveling has been completed.
(2) Geological Survey data are complete, according to groundwater depth, soil distribution and Pit Slope coefficient, determine the location of wells, amount and precipitation depth.
Second, process
Well I dug the well measured orientation → → → On casing drilling rig in place → → → backfill pit sand cushion → dipping tube wells tube wells and bore backfill the wall of a gravel filter layer → washing → Well well consists of pipe pumps, installation of pumping test pumping control circuit → → → precipitation of Wells finished work pulling well pipe → Capping
Third, the operation points and the technical requirements
1, position: According to the design of the wells and the field situation, accurately determine the well location, and well marked.
2, with circulation drill hole, aperture is generally 600 ~ 800mm, with the Slurry Wall, orifice setting casing, to prevent the orifice

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