Retaining wall

Retaining wall refers to a structure that supports subgrade fill or hillside soil to prevent deformation and instability of the fill or soil. In the cross section of the retaining wall, the part that is in direct contact with the supported soil is called the back of the wall; the part opposite the back of the wall and near the void is called the wall; the part that directly contacts the foundation is called the base; opposite to the base The top surface of the wall is called the top of the wall; the front end of the base is called the toe; the back end of the base is called the heel.

Retaining walls can be divided into three types: rigid retaining walls, flexible retaining walls and temporary supports according to their stiffness and displacement modes. According to the environmental conditions, it is divided into general area retaining walls, flooded areas retaining walls, and earthquake areas retaining walls. Retaining walls in general areas are divided into shoulder walls, embankment walls, cutting walls and hillside walls according to the location of the retaining walls.

The retaining wall installed on the side slope of the embankment is called the embankment wall; the retaining wall with the top of the wall at the shoulder is called the shoulder wall; the retaining wall installed on the side slope of the road cutting is called the cutting wall; it is installed on the hillside, supporting the hillside The retaining wall of the collapsed overburden soil or broken rock layer is called the hillside wall. According to the structural characteristics, it can be divided into stone masonry gravity type, stone masonry constant weight type, reinforced soil gravity type, concrete semi-gravity type, reinforced concrete cantilever type and arm type, anchor type and anchor plate type, vertical prestressed anchor Rod type etc.

According to the wall materials, it can be divided into stone retaining walls, concrete retaining walls, reinforced concrete retaining walls, steel retaining walls, etc. According to the force mode, it is divided into inclined retaining wall and load-bearing retaining wall.

In view of the many shortcomings in the actual application of the reinforcement belt, after years of engineering practice and scientific research, a new material that can replace the reinforcement belt—reinforced ring is proposed. 1. The action mechanism of the stiffened ring: The operating mechanism of the stiffened ring is to make full use of the high tensile strength of the steel bar, so that the lateral pressure generated by the filler in the ring is borne by the stiffened ring, and the filler in the stiffened ring is under vertical load Under the action of, it is squeezed and produces lateral expansion, and the stiffened ring restrains this lateral deformation, so that all lateral pressure is transformed into the steel ring to bear.

The roll-reinforced ring blocks the transmission of pressure from the inside of the ring to the outside of the ring, so that the filling in the ring forms a “cake”, and several layers of “soil cake” are cross-stacked to form a reinforced soil entity. 2. Force analysis of the stiffened ring: the force state of the stiffened ring under the action of a vertical uniform load is similar to the triaxial test done by people in the geotechnical laboratory.

To test the lateral pressure of the ring reinforcement, only need to paste the resistance strain gauge. When the filler height continues to rise, the tensile deformation of the reinforcement is measured and the tensile stress is calculated, so as to judge whether the reinforcement is reasonable, and the accumulation is considerable The measured data can be used for theoretical analysis and research, and provide a basis for the design.