Cement concrete expansion joint structure with large area ground, and implementation method thereof

Abstract

The invention discloses a cement concrete expansion joint structure with large area ground; the structure comprises a cushion layer (1), concrete plates (2-1, 2-2 and 2-3), main expansion joints (3-1 and 3-2) and a secondary expansion joint (4), wherein the main expansion joints (3-1 and 3-2) are arranged among the concrete plates (2-1, 2-2 and 2-3); the secondary expansion joint (4) is arranged on the concrete plate (2-3); a 'comb-teeth-shaped' cross section is formed by the concrete plate (2-3) and the secondary expansion joint (4); extruded plates (5-1 and 5-2), a flexible filler and a flexible sealing material are filled in the main expansion joints (3-1 and 3-2); and the flexible filler and the flexible sealing material are also filled in the secondary expansion joint (4). The cement concrete expansion joint structure effectively eliminates the destructive power of temperature effect for the ground concrete, and the set widths of the expansion joints are very narrow, so that the joint hole concrete exposed corners can be better protected, the quantity of the sealing material in the joints can be reduced, and good economical efficiency can be achieved.

Description

technical field [0001] The invention relates to the construction of expansion joints of cement concrete structures, in particular to the construction of expansion joints of cement concrete on large-area ground and its implementation method. Background technique [0002] With the application of cement concrete in large-area ground and pavement projects such as industrial plants, auditoriums, and exhibition halls, the effect of temperature on the thermal expansion and contraction of cement concrete has become more prominent. According to the current "Code for Construction Quality Acceptance of Building Ground Engineering" GB50209 - According to the regulations of 2010, expansion joints should be set up on a large area of ​​cement concrete ground, but there are still some problems in the actual project implementation, which leads to common quality problems of ground damage. [0003] The current specification requires that the width of the expansion joint be up to 20mm. This wid...

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Problems solved by technology

[0002] With the application of cement concrete in large-area ground and pavement projects such as industrial plants, auditoriums, and exhibition halls, the effect of temperature on the thermal expansion and contraction of cement concrete has become more prominent. According to the current "Code for Construction Quality Acceptance of Building Ground Engineering" GB50209 - According to the regulations of 2010, expansion joints should be set up on large-area cement concrete floors, but there are still some problems in the actual project implementation, which lead to common quality problems of ground damage

[0003] The current specification requires that the width of the expansion joint be up to 20mm. This width has obvious defects. On the one hand, there is a large amount of filler in the joint; Damage to the external corners on both sides of the joint, resulting in damage to the cement concrete floor along both sides of the joint

[0004] The current implementation of expansion joints usually directly adopts the process of "casting first, then cutting joints". During the construction process, there is a common phenomenon that expansion joints cannot be cut to the bottom, that is, two adjacent plates cannot be completely separated, resulting in temperature effects. problems that are prone to damage

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