【摘要】 在电梯井坑下有承压水处,经对坑内降水和坑外降水两种方案比较,最终采用在基坑内局部设置一坑一点减压降水井的方法。该法可保证基底安全,基础底板施工顺利,并最大限度地减少地下水的抽水量,保护地下水资源,减少对坑边建筑物的沉降影响。经严密观测最大沉降量在2mm左右,初步估算节约抽水费用20万元。更多还原

【Abstract】 In the elevator shaft pit where there exists pressure water,decompression well is finally adopted for the pit dewatering after alternative comparison,with one dewatering point being locally arranged for each pit.This method can not only ensure the safety of the pit bottom and smooth construction of foundation slab,but also minimize underground water extraction,thus protect underground water resource and reduce the influence on the settlement of the adjacent buildings.The maximum settlement observed precisely is about 2 mm and approximately 200,000RMB dewatering cost has been saved.更多还原