Anchor static pressure pile construction plan

&Anchor static pressure pile construction plan, how to strengthen the foundation of the building when the building is tilted. Anchor static pressure piles are anchored by burying anchors on the foundation to fix the pile reaction frame to maximize the capabilities of the building. The self-weight load is used as the reaction force for pile pressing. Use a jack to press the pile sections into the soil section by section from the pile holes reserved or dug in the foundation, and then connect the piles to the foundation to improve the bearing capacity and control of the foundation. purpose of settlement. It has the advantages of light and flexible construction machinery, convenient construction, small working area, can be constructed indoors, low energy consumption, no vibration, no noise, no pollution, etc. It is widely used in foundation reinforcement of new and old buildings.
Anchor static pressure pile construction plan
Anchor static pressure pile engineering is to bury anchor rods on the foundation to fix the pile pressure reaction frame, and use the self-weight load that the building can exert as the pile pressure reaction force , use a jack to press the pile sections into the soil section by section from the pile holes reserved or dug in the foundation, and then connect the piles to the foundation to achieve the purpose of improving the bearing capacity of the foundation and controlling settlement. It has the advantages of light and flexible construction machinery, convenient construction, small working area, can be constructed indoors and has no vibration, no noise, no pollution, etc. It is widely used in foundation reinforcement of new and old buildings.
1. Project Overview:
According to on-site observation, the building is a six-story frame structure with a floor area of 2 square meters and a load-bearing pillar. The building is now tilting to one side. In order to prevent the building from continuing to tilt, at the owner's request To reinforce the building, because the construction site space is limited and large machinery cannot carry out the construction, it is advisable to use manual pile pressing for foundation reinforcement. It is roughly estimated that the total weight of the building is about tons, and it is concluded that the load-bearing capacity of each column is about tons. Implementation plan: Reinforcement The foundation of the pillars with relatively large settlement is supported by square piles. (Because the square piles can carry tons of weight, the data can be measured on site during construction. After the foundation is reinforced, the load capacity of tons can be reached, and settlement can definitely be controlled). The piles are made of prefabricated solid square piles (length is meters), and the concrete piles are connected using electric welding machines to weld the pile press frame jacks (tons).
2. Pile pressing procedure:
Piling process: Excavate the foundation, clean the top and side covering soil, plant reinforcements and add load-bearing beams, make pile pressing holes, install the reaction frame hoisting section in place, and press The piles and pile connection construction are pressed to the designed depth or the pile pressing force is required to remove the pile pressing equipment, seal the piles, and backfill the foundation earthwork to connect the piles to the foundation.
Before construction: Clean the soil covering the surface of the platform to keep the working surface clean. Make the pile-pressing hole as required. The upper opening of the pile-pressing hole is 0.7, and the lower opening is 0.2, which is in the shape of an inverse cone. A high-strength anchor rod is buried around the pile hole, with the diameter of the anchor rod. Install the reaction frame. The installation of the reaction frame should be firm and not loose, and the vertical pile should be kept vertical after it is hoisted into the pile hole. When pressing the pile, keep the jack perpendicular to the axis of the pile section.
Pile pressing: The piling construction must not be stopped midway, and should be in place at once. If it must be stopped midway, the pile tip should stay in the soft soil layer, and the stop time should not exceed 1 hour. After the pile pressing force requirement is reached, the load must be maintained. Until the pile settlement is stable, the pile pressing unit should provide construction records such as pile length and pile pressing force in a timely manner.
. Pile connection: using electric welding. Before connecting piles, the end surfaces should be cleaned to ensure tight fit up and down. The upper and lower pile sections should be connected vertically.
. Pile cutting: The top of the pile must be pressed to the design elevation, and the pile head must be embedded in the cap. When the top of the pile does not reach the design elevation, the exposed pile head should be cut off. Before cutting the pile head, use a wedge to cut it off. The piles are fixed, and then the steel plates are removed using machines, and the concrete is chiseled away to expose the steel bars.
Before sealing the pile, the debris in the pile hole must be cleaned up, the collected water must be drained, and the floating slurry on the hole wall and pile surface must be cleaned. Concrete is used as the material for hole sealing and pile cap beam sealing, and is poured at the same time as the thickened cap concrete to strengthen the anchoring ability of the seal and make the pile and cap beam form a whole. Settlement observations of structures. After the pile sealing concrete is poured and tamped, earthwork backfilling can be carried out until the concrete has initially set.