Size and specification of concrete module brick

The characteristics of concrete modular manhole The concrete module is made of sand, stone, cement, fly ash and other raw materials in a certain proportion, vibrated with high frequency, and extruded vertically. It is a * * * product. The concrete modular manhole has changed the disadvantages of the traditional brick manhole and cast-in-place well, such as slow construction progress, clumsy technology, high strength, easy structural settlement, etc., effectively preventing the displacement and subsidence of the well body, solving the common problems on the road manhole, forming a chain during masonry, and ensuring the integrity and stability of the masonry structure. 1. Modularization. The basic size of the arc module applied to the circular inspection well is to cut all kinds of well types as a whole, form the unit block size specification by using the relationship between perimeter and diameter, and use a few types of modules to meet the application needs of all kinds of well types, forming a series of size modules. 2. Chain lock. The upper, lower, left and right sides of the module are provided with concave convex groove structure, which forms a chain after masonry. So that the shear resistance of shaft wall in all directions is far better than that of flat friction masonry. 3. Core injection hole. The module is a hollow structure. After combined masonry, the longitudinal holes are connected, the transverse holes are connected, and the cast-in-place concrete network structure is formed after core pouring, which plays the role of reinforcement and water closure. 4. Strength grade. The strength grade is divided into MU25 and MU30, which are determined by the design according to the specific service conditions. 2、 Project case analysis: There are five main roads in the campus road of a new campus of a university in Nanjing, with a total length of 2.52 km. The drainage project uses rainwater and sewage diversion. The newly laid rainwater and sewage pipes with a diameter of D0<800 use HPDE double wall corrugated pipes, and use rubber ring interfaces; The pipe diameter D0 ≥ d800 adopts reinforced concrete pipe interface and steel mesh cement mortar plaster tape interface.