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Horizontal Directional Drilling Rig (HDD) Introduction, Selection, and Engineering Applications
In the field of infrastructure construction, horizontal directional drilling rigs, as a highly efficient and environmentally friendly trenchless construction equipment, are gradually becoming the “main force” in projects such as underground pipeline laying and communication fiber opti...Read more -
Rotary drilling method for soft soil and other easily collapsible strata
1、Characteristics of soft soil and other easily collapsible strata and risks of borehole formation In soft soil, newly deposited backfill, and recently deposited loose fine sand layers, if the groundwater level is high, even with mud slurry wall protection, the borehole wall is difficult to stab...Read more -
Can we pour concrete when there is standing water in the pit?
To address this question, we must first determine whether water accumulation in the foundation pit affects concrete quality. According to Article 7.5.2 of GB/T14902 “Ready-Mix Concrete” standard: Concrete mixer trucks must completely drain water from mixing tanks before loading, and i...Read more -
There is water in the pit. Can we pour concrete?
To address this question, we must first determine whether water accumulation in the foundation pit affects concrete quality. According to Article 7.5.2 of GB/T14902 “Ready-Mix Concrete” standard: Concrete mixer trucks must completely drain water from mixing tanks before loading, and i...Read more -
When should an underground continuous wall be used?
Characteristics of Underground Continuous Walls An underground continuous wall is constructed using specialized excavation equipment. The process involves excavating a slot-shaped hole along the perimeter of a foundation or underground structure to specified dimensions, followed by installing ste...Read more -
Comparative analysis of rotary drilling rig with impact and rotary drilling rig
The rotary drilling rig, a hole-forming equipment gaining widespread acceptance in recent years, has become a widely recognized method in underground foundation construction. As the fastest-developing innovative pile hole construction technique, rotary drilling cast-in-place piles are hailed as a...Read more -
Four steps to improve the construction quality of PHC pipe pile
I. ACCESS CONTROL 1. The strength of the pipe pile shall reach 100% of the design value before it can be transported to the site. 2. The product qualification certificate, appearance and external dimensions shall be checked when entering the site. (1) Appearance: no honeycomb, exposed concrete, c...Read more -
Four steps to improve the construction quality of PHC pipe pile
1. Entry control 1. The strength of the pipe pile shall reach 100% of the design value before it can be transported to the site. 2. The product qualification certificate, appearance and external dimensions shall be checked when entering the site. (1) Appearance: no honeycomb, exposed concrete, c...Read more -
Two technical methods to improve the bearing capacity of rotary pile
At present, the common technical methods to improve the vertical bearing capacity of single pile in cast-in-place piles are foundation expansion method and post-grouting method. In the same stratum, pile end resistance is proportional to the pile’s end base area. When the pile...Read more -
When to do foundation pit support?
Foundation pit support engineering is a high-risk technical field in the construction industry. Although the incidence of foundation pit accidents nationwide has been decreasing year by year, such incidents still occur from time to time. Improper design and substandard construction quality remain...Read more -
How to drill holes and deliver piles for pipe piles?
Pier foundation hole leading method construction (1) The diameter of the pilot hole should not exceed 0.9 times of the diameter of the pipe pile, and measures to prevent collapse of the hole should be taken. The depth of the pilot hole should not exceed 12m; (2) It is advisable to use long spiral...Read more -
Construction plan of rotary drilling rig in karst stratum
When drilling in karst areas, the slurry is prone to leakage, causing a sudden drop in the slurry level inside the hole. This can lead to the failure of the casing and result in borehole collapse. The fill material in karst areas is loose and has collapsed, and if the volume of the karst area is ...Read more
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