Low headroom construction case | Yichang City, Hubei Province

Project Name:Hubei Fengshan with an annual output of 24,500 tons of p-chlorotoluene and other fine chemical products construction project

Client:Yichang Heyue Engineering Project Management Co., Ltd

Project Introduction:Hubei Fengshan construction project with an annual output of 24,500 tons of p-chlorotoluene and other fine chemical products due to the construction of some areas in the construction site under the high-voltage line, the height limit is 18 meters, the construction environment is limited, and the construction environment is limited, requiring low clearance equipment construction.

Construction Equipment:Low headroom 12.9m-SR175S

Drilling Parameters:Pile diameter: Φ0.8m-Φ2.4m Pile depth: 12m

Construction Geology:0~4m is backfill, 4~12m is strong ~ moderately weathered red sandstone, and the rock strength is about 30MPa

Drill pipe:Machine lock drill pipe Φ377×4×8.4

Drill Bucket:Φ0.8m Barrel Drill, Φ0.8m Pick Sand Bucket, Φ1.0m Rock Socketed Double Bottom Sand Bucket, Φ1.5m Pick Sand Bucket, Φ1.5m Pick Barrel Drill, Φ2.0m Pick Sand Bucket, Φ2.4m Pick Sand Bucket

Construction difficulties:Medium-weathered red sandstone began to exist about 4 meters underground, and small equipment could not meet the construction requirements; Due to the presence of high-voltage lines at the construction site, standard height equipment cannot be constructed.

Solution:Using our company's customized 12.9m low headroom SR175S rotary drilling rig, the upper 4 meters backfill soil layer is drilled with Φ1.0m rock-socketed double bottom sand bucket due to the loose stratum and some areas of stones, Φ0.8m pick sand bucket is used for strong weathered red sandstone, and Φ0.8m cylinder drill and pick sand bucket are used for the bottom of the weathered red sandstone.

Construction Efficiency:On average, about 2.5 hours into a hole, 24 hours a day can be into 8 holes