Installation method of a cement concrete pavement ground well equipment protection device

Abstract

The invention relates to a ground well protective device, in particular to a cement concrete pavement ground well equipment protective device. The protective device comprises an inner layer protective structure and an outer layer protective structure which are separate, the inner layer protective structure is connected and fixed to ground well equipment, the outer layer protective structure is annularly arranged on the peripheral side of the inner layer protective structure and located on the same central axis with the inner layer protective structure, the distance between the outer side of the inner layer protective structure and the inner side of the outer layer protective structure is 8-12 cm, and the distance between the top of the inner layer protective structure and the bottom surface of a sealing surface of the outer layer protective structure is 6-12 cm. The separate inner layer protective structure and outer layer protective structure are adopted, and an interval of 8-12 cm is set between the inner layer and the outer layer, so that influences of deformation and displacement of a cement concrete plate on the inner layer protective structure and the ground well equipment, such as a fueling ground well and an oil pipe connected with the fueling ground well, are effectively prevented.

Description

technical field [0001] The invention relates to a well protection device, in particular to a well equipment protection device for cement concrete pavement. Background technique [0002] Domestic civil airport pavement mostly adopts cement concrete rigid pavement structure, and the vast majority of station apron areas use cement concrete pavement structure due to various reasons such as numerous pipelines, busy operation, and high corrosion resistance requirements. According to the functions of each layer of cement concrete pavement and the characteristics of the materials used, it is divided into three layers: surface layer, base layer and soil foundation. In the existing rigid pavement design methods, the theoretical model based on the thin plate theory with small deflection on elastic foundation occupies the main position. In the design method, the base (cushion) layer and subgrade under the road slab can be regarded as an elastic foundation, which has only vertical suppo...

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Problems solved by technology

[0005] (1) The shell of the well is directly poured into the cement concrete. When the cement concrete is displaced horizontally, the shear force directly acts on the shell of the well, causing deformation or even destruction of the shell. When the cement concrete is vertically displaced due to settlement, due to the structure of the well It is usually rigid equipment, which is easy to cause the casing and cover to protrude, affecting the smoothness of the road surface and endangering traffic safety.

[0006] (2) Since the well casing and well equipment and pipelines are usually tightly fixed together by means of flange fixing, when the casing is severely pushed by cement concrete, it may even cause damage to the well equipment and pipelines

[0007] (3) Although the practice of setting expansion joints around the cement concrete slab where the well is located can reduce the pushing of the horizontal displacement of the concrete to the well to a certain extent, it cannot eliminate the bulge of the well caused by the vertical settlement of the pavement. When the horizontal displacement of the concrete When it exceeds 4cm, this method cannot fundamentally solve the problem that the ground well is pushed

Moreover, pavement expansion joints are usually the weakest parts of cement concrete pavement. When water from the pavement area seeps into the base layer along the expansion joints, it is easy to cause diseases such as mud pumping, wrong platform, and void at the bottom of the slab; when sand and gravel and other debris enter the expansion joints, With the expansion of the road surface, it is easy to cause the edge of the slab to break; the expansion joint is not only complicated to construct, but also the construction quality is not easy to control, and the follow-up maintenance work is heavy

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