Overview of Pile Foundations Composition and Key Features Pile foundations consist of pile groups and pile caps, offering several advantages: High bearing capacity with minimal settlement Excellent stability Reduced need for extensive excavation, minimizing…
1. Vibratory Tube-Sinking Cast-in-Place Piles Overview Vibratory tube-sinking cast-in-place piles are constructed by vibrating a temporarily sealed-bottom pipe into the ground to the desired depth. After reaching the target depth,…
Introduction to CFG Piles Cement Fly-ash Gravel (CFG) piles are a type of composite foundation pile made from a mixture of gravel, stone chips, fly ash, cement, and water. These…
1. Tri-Axis Cement Soil Mixing Pile Construction Method and Key Technical Measures 1.1 Equipment Selection and Construction Method This project utilizes the JB-160 tri-axis drilling machine for constructing Ф850@600 tri-axis cement soil mixing…
1. Loose or Fractured Soil (Lime-Soil) Piles Issue: Uneven backfilling in pile holes leads to insufficient compaction, varying density, loose pile bodies, or even fractures. Solutions: Strictly control compaction quality during…
Leakage and Sand Boiling 1) Phenomenon: During excavation, leakage is observed at steel sheet pile joints and corners, sometimes accompanied by sand boiling. 2) Cause Analysis: A. Old or poorly maintained…
Introduction With rapid urbanization and the increasing scarcity of land resources, maximizing underground space utilization has become essential. The scientific, safe, and efficient use of underground spaces heavily relies on…
Pre-construction Preparation Review all design drawings, specifications, standards, and geological survey reports to understand design intent and technical requirements Study geological conditions and distribution characteristics of various soil layers based…
Permissible Vertical Deviation in Rotary Drilling According to construction standards for rotary drilling rigs, the allowable vertical deviation is 1%. For example: A 100-meter pile permits a maximum deviation of approximately 1.7 meters. A 50-meter pile…
Challenges in Thick Sandy Stratum Construction Thick sandy stratum is one of the most frequently encountered formations during rotary drilling rig construction. To ensure smooth operations, slurry wall protection is…
1. Design Basis No. Name Code 1 Engineering Survey Code GB50026-2007 2 Code for Acceptance of Construction Quality of Building Foundation GB50202-2018 3 Unified Standard for Construction Quality Acceptance of…
