Pile driving construction process of steel sheet pile

Preparation of sheet piling

(1) Construction preparation: the groove mouth at the tip of the pile should be closed before the pile is driven to avoid soil extrusion, and the lock mouth should be coated with butter or another grease. For disrepair, lock deformation, rust serious steel piles, should be repaired and corrected, and bending deformation piles, can be corrected by oil pressure jack top pressure or fire drying and other methods.

(2) Division of piling flow section.

(3) in the process of piling. To ensure the verticality of the steel sheet pile. It is controlled in two directions by two theodolites.

(4) The position and direction of one or two steel sheet piles at the beginning of installation should be ensured to be accurate, so as to play the role of guiding plate. Therefore, every 1m should be measured, and the steel bar or steel plate should be welded to the enclosing purlin support for temporary fixation immediately after hitting the predetermined depth.

Pile driving

(1) Selection of driving mode.

Steel sheet pile construction process

The construction process of the steel sheet pile (10 sheets)

Separate into the method, starting from the corner of the wall, block by block (or two for a group), until the end of the project. Its advantages are simple construction, rapid, do not need other auxiliary support. The disadvantages are: it is easy to make a sheet pile inclined to one side, and the error accumulation is not easy to correct. Therefore, the single driving method is only suitable for conditions where the sheet pile wall is not demanding and the sheet pile length is small (such as less than 10 m).

(2) screen type driving method is to insert 10-20 steel sheet piles in rows into the guide frame, in the shape of a screen, and then beat in batches. During the construction, the steel sheet piles at both ends of the screen wall are first driven to the designed elevation or a certain depth to become the positioning sheet piles, and then the sheet piles are successively divided into L /3 and 1/2 in the middle in a ladder shape. The advantages of the screen driving method are: it can reduce the accumulation of tilt error, prevent excessive tilt, is easy to realize the closure, and can ensure the construction quality of sheet pile walls. The disadvantage is that the self-standing height of the pile is larger, and the stability and construction safety of the pile should be paid attention to.

(3) Setting up steel sheet pile.

When driving piles, the driving position and direction of the first and second steel sheet piles should be ensured to ensure accuracy. It can play the role of a template guide. Generally, every 1m should be measured once. Special-shaped sheet pile, connector method, riding seam lap method, and axis adjustment method can be used in the construction of steel sheet pile corners and closing. To ensure safe construction, pay attention to observing and protecting important pipelines and high-voltage cables within the scope of operation.

(4) Steel sheet pile removal.

Steel sheet piles should be removed during foundation pit backfilling so that they can be reused after dressing. Before removing the steel sheet piles, the removal sequence, removal time and pile hole treatment method should be studied. In order to overcome the resistance of sheet piles, according to the pile-pulling machinery used, the pile-pulling methods include static pile pulling, vibration pile pulling, and impact pile pulling. When pulling out the operation, pay attention to observing and protecting the important pipelines and high-voltage cables within the operation scope.

Pile driving equipment

1, impact piling machinery: free fall hammer, steam hammer, air hammer, hydraulic hammer, diesel hammer, etc.

2, vibration pile driving machinery: this kind of machinery can be used for pile driving and can also be used for pile pulling, commonly used is the vibration pile hammer.

3, vibration impact pile driving machinery: this machinery is in the vibration pile driver body and fixture set between the impact mechanism, in the vibration machine to produce up and down vibration at the same time, the impact force so that the construction efficiency is greatly improved.

4. Static pile pressing machinery: the sheet pile is pressed into the soil by static force.

Steel sheet pile is a kind of steel with a lock mouth. Steel sheet pile produced by Cangzhou Shenlong Pipeline Manufacturing Co., Ltd. includes U-shaped steel sheet pile, Z-shaped steel sheet pile, L-shaped steel sheet pile, linear steel sheet pile, etc. There are various sizes and interlocking forms. Its advantages are high strength, easy to drive into the hard soil; Can be used in deep water construction, if necessary, diagonal support to become an enclosure. Good waterproof performance; Cofferdams of various shapes can be formed according to needs and can be reused many times.