西川総合建設 List of Products and Services

Until now, elevation work in flood-prone areas has involved either moving buildings sideways or lifting them up and raising the ground with fill. When moving a building sideways, proper site preparation can be done, but in places where there is no space to move, site preparation is carried out under the lifted building, making construction difficult and often resulting in insufficient compaction. If water seeps in the future, there remains a risk of building settlement. The "Bulk Up Method" involves lifting the building along with its foundation, leveling it to the required height, and fixing it in place, while filling the space between the foundation and the existing ground with bulk-up material as a substitute for fill. **Features:** - NETIS registration KK-220071-A, recommended by the Ministry of Land, Infrastructure, Transport and Tourism - Since water cannot permeate, the ground does not loosen even if it is submerged. - Its lightweight reduces the burden on the original ground. - Reduces the cost burden of elevation work in house-moving projects. - Can be implemented in narrow spaces. - Shortens construction time. - Reduces damage to the building since it is lifted with the foundation. The bulk-up material is a cement-based filler that expands to 1.5 to 1.7 times its original volume after filling, leaving no voids. After elevating the building, surrounding exterior works and retaining walls can be constructed.

• Special Construction Method
• Civil Engineering Method
• Dismantling and moving

There are two main methods for settlement correction. 1. The method of raising from the foundation installed on the building's base. 2. The method of raising from beneath the building's foundation. The first method only has the effect of correcting settlement. It is not recommended due to the need for anchor cutting and foundation chipping. The second method allows for not only settlement correction but also continuous settlement suppression measures through support piles or ground improvement up to the ground support layer. Our company offers the following methods for raising from beneath the foundation as part of settlement correction work: - Steel pipe pile driving method (underpinning) - Double lock method (liquid injection method) - Pressure plate method - House lifting and raising method The steel pipe pile driving method and double lock method are techniques that can prevent future re-settlement. Additionally, all methods can be carried out while maintaining the living condition without having to move out. The construction cost of the double lock method is about half that of the steel pipe pile driving method.

• Renovation and repair methods