How many tree houses are generally supported?

There are many forms of internal support structure, which can be divided into the following categories according to the stress form of the structure.

1, horizontal or diagonal bracing, including single pole, truss and splay bracing;

2, orthogonal or oblique plane bar system support;

3, ring rod system or plate system support;

4, vertical brace.

Each form of internal bracing can be arranged in several minutes according to the specific situation. Generally speaking, horizontal bracing or diagonal bracing is often used in foundation pits with small area and regular shape; The foundation pit with large area or irregular shape sometimes needs to be supported by orthogonal or oblique plane bars; For circular, square and nearly circular polygonal foundation pits, in order to make the excavation space larger, annular bar system or annular plate system can be used for support; For shallow large-area foundation pit, vertical diagonal bracing can be used, but it should be noted that the unsupported supporting structure should meet the requirements of bearing capacity, deformation and overall stability before setting diagonal bracing foundation and installing vertical diagonal bracing.

For various support forms, the layout of the support structure should pay attention to the distribution of the overall stiffness of the support system, avoid sudden changes, and make the horizontal force center consistent with the support stiffness center as much as possible.