Shanghai Jintai full casing drilling rig upgrade SZ80-45 Dalian "really"

Recently, information was received from the site of the pile foundation project of the Heikouzi Wharf and surrounding land construction projects in Shanghai. The Shanghai Jintai SZ80-45 full-hole casing drilling rig is well-known for its hole-forming efficiency and rock-entry capability, and its unique equipment performance and The advantages of the process, from the standout of rotary drilling rigs, stood at the speed of 70 minutes for the average drilling time, becoming the “efficiency champion” of the pile foundation construction machinery at the site.

It is understood that the project will be developed by Li Ka-shing's Hong Kong-based Changjiang Real Estate. The plot will cover a total land area of ​​142,900 square meters. It will build eight houses, one apartment and more than ten public facilities. All residential and public buildings are high-rise buildings. With a height of more than 30 floors and a total construction area of ​​more than 720,000 square meters, it is a major development project in Dalian in 2017.

The project geological survey data show that the geological structure of the block and its surrounding areas is mainly composed of backfill, loose layer of sand and gravel, fully weathered and moderately weathered diabase and slate (20-30 MPa) and breeze diabase (above 60 MPa). Rock and soil composition, the depth of the pile in the operation area is divided into three areas of 11.5 meters, 14 meters, and 17 meters from south to north, which is a great test for the stability of the rig and the ability to enter the rock.

Shanghai Jintai SZ80-45 full casing drilling rig construction

Shanghai Jintai SZ80-45 full casing drilling rig construction

Shanghai Jintai SZ80-45 full casing drilling rig construction

The SZ80-45 is a pile-based product with the most distinctive and versatile features in the Shanghai Jintai series. The product adopts a highly stable electro-hydraulic walking type working platform equipped with two power heads of 360KN.m and 650KN.m torque to drive the casing and drilling tools respectively. The maximum hole diameter for full casing drilling is 1.2. The meter can reach a depth of 45 meters and the hole depth is 10 meters deep on the basis of the original SZ80-35. In the expansion of engineering methods, the functions of cast-in-place piles, snap-fit ​​piles, CFG piles, and clearances can be implemented.

In terms of power configuration, SZ80-45 is equipped with 4 sets of motor units and 8 independent pump stations with total power of 440 KW. At the same time, it is equipped with a dedicated hole bottom slag removal device - hydraulic slag hopper, with auxiliary hoist suspension. , can replace the grab flap according to different apertures, to meet the different pore size of the slag requirements.

On-site construction records: Rotary drilling rigs in the same area use 5 meters of retaining wall to protect the wall. Drills are alternately drilled using tube drills and core drills. Clearing holes are cleaned by the drill hole. The hole forming time is between 130-170 minutes. SZ80 -45 using 8 m casing wall protection, screw drill drilling, self-carrying slag bucket clear hole, the hole forming time is 60-80 minutes. As of the date of the press release, Shanghai Jintai SZ80-45 has completed the construction of more than 200 pile foundations at the site of the Dalian Kuriko Terminal. (This article comes from Shanghai Jintai)