What are the precautions for pulling out steel sheet piles?

1. Removal time.

Pile pulling will produce a certain vibration, such as pulling the pile and then bringing too much soil will cause the displacement of the soil and the settlement of the ground, causing unpredictable consequences, so for the closed steel sheet pile wall, the starting point of the pile pulling should leave more than 5 corner piles, and if necessary, it can also be pulled out at intervals by the method of jumping and pulling. If conditions permit, the steel sheet pile is re-beaten with a vibrating hammer, and the adhesion of the soil can also be overcome;

2. Sequence of steel sheet pile pulling.

The order of piling is generally reversed from the order of piling.

3. Pile hole treatment method.

For the pile hole generated by the pile pulling, it is necessary to backfill it in time to reduce the impact on the adjacent buildings, and then the method of sand filling or grouting while pulling the pile can be adopted. In addition, in order to effectively remove the steel sheet pile, Shanghai Kaida Foundation Engineering teaches you to deal with the driving situation of each steel sheet pile before the operation, and you should conduct a detailed investigation to judge the difficulty of the pile pulling operation; In the protection of the secondary use of steel sheet piles, the pulled out steel sheet piles should be removed from soil and sand in time and coated with grease. The steel sheet piles with large deformation need to be straightened, and the complete steel sheet piles should be transported out of the construction site in time and stacked on a flat site.

Summary. Dear, hello, I have inquired for you to pull the steel sheet pile after the need for grouting. After the concrete construction in the steel sheet pile foundation pit, after the concrete strength reaches the requirements, the steel sheet pile and the concrete interval area are backfilled, and then the pile is pulled, the pile is generally carried out by pile sinking equipment, the pile pulling sequence is generally opposite to the piling sequence, if the pile pulling is blocked, the pile can not be forced to pull the pile, and the method of liquefiing the soil or sinking the pile about 1m can be used to vibrate the vibrating hammer to make the soil liquefied or sink the pile about 1m, and then pull the pile.

After the pile, the gap left by the steel sheet pile should be backfilled and the site should be leveled and left the site. 1. When pulling out the steel sheet pile, it is necessary to do: sub-cabin and segmented jump and pull construction.

The jump-out process mainly solves the influence problem between the excitation position of the pile and the deformation joint of the pipe gallery. When jumping and pulling, it is necessary to carry out symmetrical balance, and use the foundation soil to balance the simple support of the pipe gallery box culvert, and it is best to be symmetrical jumping and pulling of double machines, and the efficiency of single machine jumping and pulling will be reduced. 2. Grouting should be carried out in time after jumping and pulling the steel sheet pile, and the grouting is to make up for the cavities formed after the pile is pulled out of the soil as much as possible, but attention must be paid to the synchronization and pressure balance of the grouting and the pile.

The construction grouting equipment must meet the schedule requirements of grouting, otherwise the effect of grouting will be greatly reduced.

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Dear, hello, I have inquired about the need for grouting after pulling the steel sheet pile. After the concrete construction in the steel sheet pile foundation pit, after the concrete strength reaches the requirements, the steel sheet pile and the concrete interval area are backfilled, and then the pile is pulled, the pile is generally carried out by pile sinking equipment, the pile pulling sequence is generally opposite to the piling sequence, if the pile pulling is blocked, the pile can not be forced to pull the pile, and the method of liquefiing the soil or sinking the pile about 1m can be used to vibrate the vibration hammer generally, and then disturb the pile pulling. After the pile, the gap left by the steel sheet pile should be backfilled and the site should be leveled and left the site.

1. When pulling out the steel sheet pile, it is necessary to do: sub-cabin and segmented jump and pull construction. The jumping process mainly solves the influence of the starting stove between the excitation position of the pile and the deformation joint of the pipe gallery.

When jumping and pulling, it is necessary to carry out symmetrical balance, and use the foundation soil to balance the simple support of the pipe gallery box culvert, and it is best to be symmetrical jumping and pulling of double machines, and the efficiency of single machine jumping and pulling will be reduced. 2. Grouting should be carried out in time after jumping and pulling the steel sheet pile, and the grouting is to make up for the cavities formed after the pile is pulled out of the soil as much as possible, but attention must be paid to the synchronization and pressure balance of the grouting and the pile. The construction grouting equipment must meet the schedule requirements of grouting, otherwise the effect of grouting will be greatly reduced.

What are the key points to pay attention to in steel pile welding?

1. The dirt such as floating rust and oil stain at the end of the pile must be removed and kept dry; The part of the lower section pile top deformed after hammering should be cut;

2. The verticality should be corrected when the upper and lower section piles are welded, and the gap between the counterparts should be 2 3mm;

3. Welding wire (automatic welding) or welding rod should be dried; Bark.

4. Welding should be symmetrical;

5. Multi-layer welding should be used, the joints of each layer of welds of the steel pipe pile should be staggered, and the welding slag should be removed;

6. When the temperature is lower than 0 or there is no reliable measure to ensure the quality of welding in rain and snow, it shall not be welded;

7. After the welding of each joint is completed, it should be cooled for 1min before hammering;

8. The welding quality should be in line with the provisions of the current national standard "Code for Acceptance of Construction Quality of Steel Structure Engineering" GB 50205 and "Technical Regulations for Welding of Building Steel Structures" JGJ 81, each joint should be inspected in addition to the visual inspection according to the provisions of this specification table, and should also be ultrasonic or 2% of the total number of joints for X-ray inspection, for the same project, flaw detection sampling inspection shall not be less than 3 joints.

Steel sheet pile is a steel structure with a linkage on the edge, and this linkage can be freely combined to form a continuous and tight retaining or retaining wall. In order to reduce the amount of earthwork excavation and backfill, the materials used are reusable, and in order to achieve the purpose of reuse after being driven in by machinery, they should be pulled out by machinery, so there is a saying that the steel sheet pile is pulled.

In short, the materials used in steel sheet piles are generally I-beams or channel steel, which are mainly used when excavating earthworks on soft foundations

1. Strengthen the slope to ensure the safety of construction personnel.

2. Reduce the amount of earthwork excavation and backfill. Because the materials used are reusable, in order to achieve the purpose of reuse after being driven in by machinery, they must be pulled out by machinery, so there is a saying that the steel sheet pile is pulled.

Use vibrating pendants or manipulators, hydrostatic pile planters and other equipment.

The steel sheet piles are driven into the soil and used as temporary retaining materials.

After use, it is pulled out in reverse according to the same principle.

Abbreviated as drawing steel sheet piles.

The following procedures are required for the drawing of steel sheet piles: before pulling the steel sheet piles, it is necessary to conduct on-site investigation and measurement, confirm the location and number of piles, and formulate a pile pulling plan. Drawing steel sheet piles belongs to the scope of building construction, which requires construction drawing design, construction plan preparation and safety evaluation, etc., and submits relevant documents to the local construction supervision department for review.

To pull out the steel sheet piles, you need to apply for a construction permit, and the pile pulling operation can only be carried out after obtaining the permit. During the pile pulling process, on-site monitoring and safety protection measures are required to ensure the safety of operators. After the steel sheet pile pulling operation is completed, it is necessary to carry out acceptance and recording, confirm the quantity and quality of the uprooting, and submit an acceptance report.

Pro, the drawing of steel sheet piles belongs to the category of civil engineering, and the corresponding procedures need to be carried out before uprooting, as follows: 1Conduct safety assessments and develop pile pull-out plans

This includes assessing the potential safety issues and the impact on surrounding buildings and structures during uprooting, and formulating a plan for pile pulling. 2.Apply to the local construction department for a demolition permit:

After the demolition is completed, it is necessary to carry out acceptance to ensure that the demolition work meets the relevant safety, health, environmental protection and other requirements. Depending on the region, the scale of the project, and the laws and regulations, the specific procedures may be different. If necessary, please consult the relevant local construction or civil engineering related departments or professionals from a professional sheet pile drawing company.

<> the details of the safety technical regulations for drawing steel sheet piles, Zhongda Consulting will explain to you.

1. Before operation, the condition of winch brakes, pile hammers, wire ropes, shackles, chucks, hoists and other parts should be checked. 2. The pile frame should be placed flat and stable, the cable wind rope should be evenly pulled, and the runway under the pile frame should be flattened. 3. When hanging piles, a slip rope should be used, and there should be a special person to command during operation.

A warning area should be set up at the site of steel sheet pile pulling, and non-professionals are not allowed to enter. 4. When moving the pile frame, it should keep a safe distance from the overhead wire, and the pile hammer should be placed on the bottom layer. The wind rope should be slowly released according to the tightness of the rope, the rope should be tied in a firm place, the remaining rope should not be less than 5m, the cable wind angle is generally 30 ° 45 °, and pay attention to avoid the lane.

5. The position of the winch should be set up in the place where the piling site can be observed, and the anchor pile or the ground should be transported with sufficient anchoring force, and the operator should obey the command of a special person and operate next to the machine. 6. When piling across the trench, the steel plate, the subgrade box plate or the square timber girder should be padd. 7. The wires of the electric pile driver should be overhead, and the power supply should be cut off when the operator leaves.

8. When driving piles with a combined brake switch, attention should be paid to gearing, and it is strictly forbidden to mix hanging piles with piling. 9. In case of hard objects, when it is difficult for the pile to enter the soil, attention should be paid to the hammer jumping high and colliding with the top frame. 10. When pulling the pile with a herringbone rod or pile pulling frame, the upper part of the rod should be tied tightly, the lower part should be fixed, and the wind rope at both ends should be tied to the reliable pile foundation.

The steel plate cannot be pulled out at the same time.

Steel sheet pile is a steel structure with a linkage device at the edge, and this joint loss and destruction device can be freely combined to form a continuous and tight retaining or retaining wall. In order to reduce the amount of earthwork excavation and backfill, the materials used are reusable, and in order to achieve the purpose of reuse after being driven into the machine, it is necessary to pull out the steel sheet pile.