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Safety Technical Operating Regulations for Spiral Drilling Machines

1. At the site where the drilling machine is used, obstacles such as stones at the hole location and in the surrounding area shall be cleared in accordance with the requirements of the drilling machine manual. 2. The distance between the work site and the power transformer or main power supply line shall be within 20

2013-07-16
Precautions for Bored Pile Construction in Karst Areas

1) During grouting, if the material feed is normal but the mud level does not move or the return volume is small, it can be judged that a cavity has formed in the artificial hole wall, causing concrete to flow into the karst cave. If this occurs during concrete grouting, immediately contact the batching plant, prepare sufficient concrete, and continue grouting until the returned mud volume is normal, then resume normal grouting.

2013-07-15
Case Study of an Ultra-Deep Foundation Pit in an Artificial Island Cofferdam on Coastal Soft Soil

Taking the cross-sea tunnel project of the new campus of the University of Macau on Hengqin Island as the research background, this paper focuses on the analysis and study of an offshore artificial island cofferdam ultra-deep foundation pit project under ultra-deep soft soil geological conditions in a coastal area. It introduces the

2013-07-15
Discussion on the Initial Support Design of Shallow Buried Excavation Method

With the rapid development of urban construction in China, there are more and more underground space development projects, such as subway projects, underground passages, underground commercial streets, etc. The construction methods of underground engineering are mainly open-cut sequential excavation method, cover-cut sequential (reverse) construction method and subsurface excavation method. The subsurface excavation method is further divided into shallow buried excavation method, shield method, pipe jacking method and NTR method, etc. In urban projects with good geological conditions, the shallow buried excavation method is widely used, but tunnel specifications and textbooks in different industries provide different methods for the calculation and design of initial support, making it difficult for designers to choose.

2013-07-15
Differences Between DTH Drills and Hydraulic Drills

Down-the-hole (DTH) drills generally achieve relatively shallow drilling depths and have no hydraulic lifting device; the drill string is raised and lowered entirely by a winch. They typically use a pneumatic impactor with air as the medium to flush out rock cuttings. The power system is generally

2013-07-15
Components of Hydraulic Systems and Their Functions

A complete hydraulic system consists of five parts: power components, actuators, control components, auxiliary components, and hydraulic oil. The function of the power component is to convert the mechanical energy of the prime mover...

2013-07-15
Forms of Different Hydraulic Systems and Related Evaluations

Hydraulic components have gradually achieved standardization, serialization and generalization, with their specifications, varieties, quality and performance greatly improved. In particular, after the adoption of new technologies and processes such as electronic technology and servo technology, the quality of hydraulic systems has been significantly improved, and they have played a major role in the national economy and military industry.

2013-07-15
Relevant Matters to Note for Regular Excavator Maintenance

① After a new machine has operated for 250 hours, the fuel filter element and auxiliary fuel filter element should be replaced; check the engine valve clearance. ② Daily maintenance: inspect, clean, or replace the air filter element; clean the cooling system.

2013-07-15
Lishide Excavator SC130.7: 7,000-Hour Work Report

As Lishide's nationwide "Ten-Thousand-Mile Service Tour" rolls out across the country, visits in the Shandong region are also in full swing. On June 8, 2011, our team arrived at a customer site in Mengyin County, Linyi, Shandong.

2013-07-15
Pushi Heavy Machinery PZ60-7A Destructive Test Prototype Test Report

Sichuan Pushi Heavy Machinery Co., Ltd. conducted a 500-hour destructive test on its first independently developed PZ60-7A mini excavator. On a construction site, it has already worked continuously for 24 hours for more than 50

2013-07-15
Safety Operating Procedures for Down-the-Hole Drills

1. Before use, check the flexibility of the pneumatic motor's rotation, clear obstacles within the drill's operating area and on the travel path, and check the road's passability. 2. Before operation, check the

2013-07-12
Key Considerations When Buying a Used Excavator: A Must-Read for Beginners

Check whether the engine leaks oil, whether the excavator emits heavy black smoke during normal operation when the throttle is increased, and whether there are abnormal noises or signs of strain. To test the main pump's power, keep the engine at idle and try to lift the machine body; if it cannot be lifted, the pump lacks power, or if the engine makes abnormal noises while lifting, the engine power is insufficient.

2013-07-12

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