Advantages and disadvantages
Rail pile
Earth-retaining operation
The gap between the rails of the rail pile is larger, which is suitable for shallow excavation or soil layer with more gravel.
Rail pile characteristics:
It is applicable when the geological condition is good, the soil side pressure is low, the groundwater level is low, and the excavation depth is about 3~5m.
Rail pile advantages and disadvantages:
It is suitable for gravel soil layer with good geology, but its water resistance is not good and its verticality is difficult to grasp.
Construction steps of rail pile:
- Lofting before construction, because the verticality of the rail pile is less easy to grasp, it is best to be far from the intended inner wall.
- Direct piling, the piling interval should be considered according to the quality of the soil.
- Drive into the center column.
- Start excavation.
- During the excavation process, the lining board should be applied to prevent the sand and stones from falling.
- If the excavation depth is too large, it must be supported by a safe earth-retaining support.
- Excavate to the required depth and wait for the rail pile to come to an end when the lining board is completed.
- After the construction of the basement roof is completed, the rail pile is removed and the rail pile project is completed.
Sheet pile
The steel sheet pile is the simplest retaining project. The wall is constructed as a hypothetical project. It will be removed after completion. The wall is set to vibrate and sound, and the waterproof is not particularly good. It often needs to be combined with deep water wells. Implementation.
Steel sheet pile features:
It is suitable for areas with large excavation depth, high soil pressure and groundwater.
Advantages and disadvantages of security support:
- Vibration setting: The advantage is that the construction period is faster and the verticality is better controlled, but its shortcomings cause greater noise and the surrounding vibration is also more destructive.
- No vibration setting: The advantage is that there is no noise and no destructive vibration, but the progress of the construction period is very slow, and the verticality is more difficult to master, and the cost is more expensive.
Construction steps of vibrating steel sheet pile:
- Set up surveying and mapping at the base.
- Digging guide trenches to facilitate designing, without difficulty due to topsoil rubbish or stones, and the water poured during designing will not overflow.
- When setting up the first steel sheet pile, the verticality should be very accurate, so that the next row of steel sheet piles can be kept accurate.
- Need to cooperate with the crane to put the steel sheet pile into the guide trench along the groove first, and then use the strange hand to drive the steel sheet pile into the trench, the deepest can be driven into 20 to 21 meters.
- The way of arranging the plates is forward and reverse, and the groove of the steel sheet pile should be aligned.
- When setting up the pile body, remember to water it in time to prevent the sheet pile from overheating and have a lubricating effect.
- The noise and vibration caused by the layout will greatly affect the neighboring neighbors. During the layout, the neighbors should be communicated and coordinated.
Construction steps of static pressure steel sheet pile:
- Set up surveying and mapping at the base.
- Digging guide trenches to facilitate designing, without difficulty due to topsoil rubbish or stones, and the water poured during designing will not overflow.
- Use a special pedestal to set up the first steel sheet pile. The verticality should be very accurate so that the next row of steel sheet piles can be kept accurate.
- The steel sheet pile must be lifted by a crane and placed at the entrance of the machine before it can be used.
- Because the hydraulic pressure is entered by a single support, the verticality is not easy to control, and it is not necessary to use steel sheet piles that are too long.
- When setting up the pile body, remember to water it in time to prevent the sheet pile from overheating and have a lubricating effect.
