Steel sheet piles and soil retaining structures are less rigid than underground diaphragm walls and mixing piles. If the design and construction are not taken seriously, the foundation pit (trough) will become unstable, seepage and leakage of slurry and mud will cause the surrounding foundation soil to settle, and cause damage to surrounding buildings and pipelines.
Accidents that often occur during construction are:
1. The pile body breaks.
2. The top of the pile is broken.
3. Pile sinking fails to meet the design requirements.
4. The pile body is inclined.
Reason analysis of pile fracture:
1. The pile body is greatly bent during the construction process. Under repeated concentrated loads, when the pile body cannot bear the bending strength, it will break.
2. The pile is subjected to tensile and compressive stress during repeated long-term impact. If the tensile stress is too large, the concrete will be broken and the pile body will break.
3. The grade of cement used to make the piles does not meet the requirements, and the amount of mud and gravel in the sand and stones is too large, and this part breaks during construction.
Analysis of the reasons for pile top cracking:
1. The strength of the pile top is not enough
2. The shape and quality of the pile body does not meet the specification requirements.
3. Improper selection or use of construction machinery and tools, especially the weight of the pile hammer and the number of hits should be analyzed.
4. The contact surface between the pile top and the pile cap is uneven.
5. No cushion was added to the top of the pile during pile sinking or the cushion was damaged and was not replaced in time.
Analysis of the reasons why the pile sinking cannot meet the design requirements:
1. The exploration data is incomplete or does not accurately reflect the site engineering geological conditions.
2. The choice of pile hammer is too large or too small, so that the pile sinks below the design requirements to control the elevation.
3. The top of the pile is broken or the pile body is broken so that the pile cannot continue to be driven in.
Analysis of the reasons for the inclination of the pile body:
1. The piling machinery itself has poor adjustment ability and cannot be adjusted according to the fluctuation of the site.
2. When stabilizing the pile, it is not vertical, and the pile cap, pile hammer and pile are not on the same straight line. Due to poor consideration of the construction organization design or poor quality management system during the construction process, the sheet piles will eventually fail to close together, the axis deviates from the design requirements, and the distance between the end faces cannot be guaranteed. In the end, it will affect the installation accuracy of subsequent foundation pit (trough) excavation, inner purlin and support.
Accidents that often occur during construction are:
1. The pile body breaks.
2. The top of the pile is broken.
3. Pile sinking fails to meet the design requirements.
4. The pile body is inclined.
Reason analysis of pile fracture:
1. The pile body is greatly bent during the construction process. Under repeated concentrated loads, when the pile body cannot bear the bending strength, it will break.
2. The pile is subjected to tensile and compressive stress during repeated long-term impact. If the tensile stress is too large, the concrete will be broken and the pile body will break.
3. The grade of cement used to make the piles does not meet the requirements, and the amount of mud and gravel in the sand and stones is too large, and this part breaks during construction.
Analysis of the reasons for pile top cracking:
1. The strength of the pile top is not enough
2. The shape and quality of the pile body does not meet the specification requirements.
3. Improper selection or use of construction machinery and tools, especially the weight of the pile hammer and the number of hits should be analyzed.
4. The contact surface between the pile top and the pile cap is uneven.
5. No cushion was added to the top of the pile during pile sinking or the cushion was damaged and was not replaced in time.
Analysis of the reasons why the pile sinking cannot meet the design requirements:
1. The exploration data is incomplete or does not accurately reflect the site engineering geological conditions.
2. The choice of pile hammer is too large or too small, so that the pile sinks below the design requirements to control the elevation.
3. The top of the pile is broken or the pile body is broken so that the pile cannot continue to be driven in.
Analysis of the reasons for the inclination of the pile body:
1. The piling machinery itself has poor adjustment ability and cannot be adjusted according to the fluctuation of the site.
2. When stabilizing the pile, it is not vertical, and the pile cap, pile hammer and pile are not on the same straight line. Due to poor consideration of the construction organization design or poor quality management system during the construction process, the sheet piles will eventually fail to close together, the axis deviates from the design requirements, and the distance between the end faces cannot be guaranteed. In the end, it will affect the installation accuracy of subsequent foundation pit (trough) excavation, inner purlin and support.
