SUNSHINE CIT

SUNSHINE CIT

10/11/2020

 

SUNSHINE CITY

      Work:
      Pump to lower underground water
      Place:
      Bac Tu Liem, Hanoi
      Investor:
      Sunshine Group
WATER DRAINING - HANOI AREA

1. Location and scale of construction

CONTRACT OF COMMERCIAL SERVICES, CHOOSE AND LOW-rise housing (SUNSHINE CITY) is located at Lot 1.A.23 Nam Thang Long Urban Area, Dong Ngac and Xuan Dinh Wards, Bac Tu District Liem, City. Hanoi.

Total area of construction of the tunnel is about 18,000 m 2 , the deepest dig depth of -17.1m.

Sunshine Russia

2. Purpose and items of the work to lower the groundwater level

Pump to lower the underground water level to an elevation about one meter lower than the tunnel excavation level to dry out the ground for tunnel construction and ensure the safety of the work, etc

Monitoring the well during the pumping process to monitor the water level, adjust the design and regulate the amount of pumped water accordingly to ensure the construction process is on schedule and appropriate.

STT

Work

Unit

Amount

expected

Note

first

Drilling wells, pumping underground water

Well

32

 

2

Well Operation

Well

32

 

3

Reserve supplies

 

 

Takes 20% of the calculation

3. Design of pump well system to lower underground water level

Underground water level chart

Countour Street, Sunshine City 1-2-3 . underground water levelGround water level chart

Sunshine City Underground Water Level Contour Road 4-5-6

4. Construction

Stage 1: Construction of the well

Based on geotechnical documents, carry out the following works:

Step 1: Drill holes

  • Arrange XY-100 machine drilling rig or A-shaped drilling rig to construct underground water pumping wells:
  • Position the well (with design drawings) so that the drilling equipment is in the correct position.
  • Locating the drilling tower, making a line around the drilling area to store drilling fluid size 3x2.5x0.3m.
  • Drilling by the method of total destructive drilling to observe the drilling mud with drill diameter of 315-350mm, to an average height of -28.9m. Describe the actual stratigraphy, record the site logbook and drill specifications in accordance with the normative process of the Hydrogeology industry.

Step 2: Anti-tube

  • PVC pipe D200, 4.5 to 6 mm thick from: existing ground to -18.9m elevation.
  • PVC filter pipe D200, filter hole 3-5mm, wrapped around plastic mesh or gravel, 4.5-6mm thick, average height from -18.9m to -28.9m.
  • After the pipe is finished, carry out pumping to clean the well, clean the drilling mud & dilute the bentonite clay solution, choose the right time to pour the D3 - 6mm filter  grit , with a volume of 0.5-1.0m 3 from the height of -17.9 m to – 28.9m.
  • Carry out washing well with submersible pump. Pump clean well until well water is clear, no fine sand, measure flow, measure static water level
  • After drilling is completed, the drilling team collects materials and cleans the working area

Stage 2: Laying

  • Drop submersible pump with flow Q = 20 – 35m 3 /h; 3 phase x 380 volts and pump accessories for pump wells in the basement.
  • The pump is dropped into the well to at least 5-7m lower than the MNN, the pump is suspended by a parachute rope.
  • Pipeline : ống90 or Φ75 plastic pipe (depending on pump capacity) is installed from the well location to the settling tank in the project.
  • Install the exhaust system from the pump head to the sump of the construction site.

Flower bombs in HanoiPump 10Hp

Stage 3: Operation:

  • Pump wells are tested after 48 hours, then check the sand content, if the well has no sand, continue to operate. If the well has sand, proceed to pump and rinse the well.
  • The wells are turned on one by one, 24 hours apart, during the lowering of the groundwater level, the internal water level is monitored   once a day to control the rate of lowering the groundwater level.
  • The number of wells operated depends on the level of lowering of the water level monitored through the monitoring well and the excavation speed of the basement.
0

         

có 0 đánh giá

5
0 đánh giá
4
0 đánh giá
3
0 đánh giá
2
0 đánh giá
1
0 đánh giá

Thành công

hello

Lỗi

hello

Chia sẻ
Database Error

Công Ty Truyền Thông Và Quảng Cáo Siêu kinh doanh

A Database Error Occurred

Error Number: 1055

Expression #21 of SELECT list is not in GROUP BY clause and contains nonaggregated column 'thaiduonghe_db.lg.title' which is not functionally dependent on columns in GROUP BY clause; this is incompatible with sql_mode=only_full_group_by

SELECT `cle_post`.*, `lg`.`title`, `lg`.`content`, `lg`.`excerpt`, `lg`.`language` FROM `cle_post` JOIN `cle_relationships` as `r` ON `r`.`object_id` = `cle_post`.`id` JOIN `cle_relationships` as `r2` ON `r2`.`object_id` = 37 AND `r`.`category_id` = `r2`.`category_id` JOIN `cle_language` as `lg` ON `lg`.`object_id` = `cle_post`.`id` WHERE `public` = 1 AND `trash` = 0 AND `post_type` = 'post' AND `cle_post`.`id` <> '37' AND `r2`.`object_type` = 'post' AND `lg`.`language` = 'en' AND `lg`.`object_type` = 'post' GROUP BY `r`.`object_id` ORDER BY `order`, `created` desc LIMIT 6

Filename: /home/thaiduonghe/domains/thaiduonghe.vn/public_html/core/MY_Model.php(1) : eval()'d code(1) : eval()'d code

Line Number: 190