Sinking-prevention structural body of well peripheral composite material

Abstract

The invention discloses a sinking-prevention structural body of a well peripheral composite material. The structural body comprises a base and a well lid seat. The base is a table body, wherein the center of the table body is provided with a through hole matched with the well lid, and the base is embedded on the roadbed on the periphery of a well hole of an inspection well. The well lid seat is arranged on the base and is flushed with the road surface. The base is made of concrete composite materials and comprises, by weight, 300 parts to 500 parts of cement, 30 parts to 50 parts of expanding agents, 1500 parts to 2000 parts of aggregate and 8 parts to 10 parts of water reducing agents. According to the sinking-prevention structural body of the well peripheral composite material, the load diffusion area is increased so as to obviously reduce shaft stress, and the phenomena of well periphery sinking and the like caused by damage of a brick body of the shaft are avoided.

Description

technical field [0001] The invention relates to a building prefabricated component, in particular to a composite material anti-subsidence structure around a well. Background technique [0002] The inspection well is a well-shaped structure located on the underground pipeline. It is an operating space for checking the operation of the pipeline and dredging. It is used to connect professional pipelines with different elevations, different slopes, different pipe diameters, and different directions. It is an underground pipeline project. Essential municipal facilities. The inspection wells on the motorway mainly include water supply inspection wells, rainwater inspection wells, sewage inspection wells, electric power inspection wells, communication inspection wells, etc. According to the shape of the wellhead, inspection wells are divided into circular inspection wells and rectangular inspection wells. At present, the vast majority of these inspection wells are circular brick ...

AI Technical Summary

Problems solved by technology

At present, most of the inspection wells in our country adopt cement mortar brick-laying structure. Due to the uneven spread of the mortar during construction, uneven or not full, and the uneven surface of the bricks, each brick is no longer evenly compressed, but in a state of The combined stress state of compression, bending and shearing, coupled with the interaction of the difference in lateral deformation between bricks and mortar, causes vertical cracks to appear in the brickwork when it is much smaller than the compressive strength of the bricks. The development of these cracks eventually makes the masonry The integrity of is destroyed and becomes a discrete body

At the same time, the durability of clay bricks is poor. After 7 to 8 years of use, it will cause rot and shedding due to water and soil corrosion. tilt

In addition, part of the inspection well shaft is provided with a closing section at the top. Due to the inclined arrangement of the brick masonry, the masonry structure bears a large bending and tensile stress under the load of the vehicle, and the tensile strength of the masonry structure itself is small. The closing section is the weak link for checking the force of the wellbore, and it is easy to cause damage from here

2. Check the unstable installation of the manhole cover support to cause displacement and structural damage

As the inspection well is a small structure attached to the municipal engineering, the mortar is generally mixed manually on site, and the strength and quality are not easy to guarantee, and the thickness of the mortar leveling layer is uneven, and it is easy to be crushed under the load of the vehicle, causing the support and the well cover to sink. further damage to the pavement

3. It takes more than 28 days for concrete, mortar, etc. to reach the design strength. However, in municipal engineering construction, there is often a phenomenon of rushing construction period or unreasonable construction period arrangement. Rolling before its strength is formed will easily cause the structure to collapse Deformation or damage occurs during construction

4. The compactness of the backfill around the well is unqualified

According to the requirements of relevant specifications, the compaction degree of the backfill soil around the inspection well should be greater than or equal to 95% (heavy compaction standard). However, most of the current situations are that after the completion of the inspection well masonry, the gap between the well and the working pit is small. Even due to the limited road width, the distance between wells and wells, and between wells and roadside stones is too small, which makes mechanical rolling difficult, and manual compaction makes it difficult to control the quality, which leads to the gradual settlement of the backfill around the well during use. Cause the pavement around the well to subside and crack around the inspection well

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