Application Study And Storey Stress Analysis On The Synchronous Crushed Stone Bonding Layer For Bridge Deck Pavement

Bonding layer damage is a major reason that causes bridge deck pavement to disease, contact status between layers has complex comparison, includes to bonding layer material glue power, also has the power of frictional resistance between concrete fair material and the board of bridge floor; it is also very difficult to determine the mould or rigidity of the bonding layer. Once the vehicle load and temperature stress act, greater shearing stress inside the deck produces, which would lead to shear deformation in the undetermined shearing surface, or should lead to shear failure because of the weak bonding ability and weak level anti-shearing ability. Shear failure directly causes harmful material to seep, the speed of seep is controlled by the size of crack in the deck; the bonding layer is the final defensive line to prevent the harmful material to seep, thus it is very important to analyse on the mechnics control index of bonding layer. This paper analyses reason of asphalt concrete bridge deck pavement disease through the inquiry of form and the reason produced, suggests it has much superiority with synchronous pavement bonding layer. Using ANSYS finite element for Synchronous pavement bonding layer, it has carried out system analysis of the load stress; According to the discrepancy of temperature stress of synchronous pavement bonding layer and temperature stress of the ordinary road surface, it has calculated synchronous pavement bonding layer thermal stress change law; According to the common role of thermal stress and load stress, it has made the asphalt concrete bridge deck pavement stress working behavior. Using interface mechanics and breaking mechanics theory ,it analyses the anti-permeability and crack resistance of the synchronous pavement bonding layer; Passing through shear test, pull to pull-out test and anti-permeability test,it studies the standard of choosing materials such as asphalt,crushed stone and the OACmin～OACmax of the synchronous pavement bonding layer;it affords the optimum construction procedure. Synthesizing mechanics state and test index analysis of the synchronous pavement bonding layer with other waterproof material layers, synchronous pavement bonding layer has well-performance with the lowest price and the most vast application prospect. The research on this paper consists of six aspects as follows:1,Using ANSYS finite element for Synchronous pavement bonding layer, it has carried out system analysis of the load stress. It has systemly analyzed the change law of load and t thermal stress on synchronous crushed stone between layers.2,Calculates the ability of the anti-fracture and fatigue with fracture mechanics theory on synchronous pavement bonding layer. It can get the fracture stress under single load and the fatigue life under shuttle force with fracture mechanics theory when the load and thermal stress less the ultimate tensile strength.3,Imitate the board of bridge floor, for the synchronous pavement bonding layer, carries out shear test respectively, pull to pull out experiment , fight exhausted experiment, impermeability experiment and temperature sensitivity experiment. From test data, carries out orthogonality analysis: Synchronous crushed stone bonding layer material as waterproof has good endurance and impermeability, good anti-crack property as well as sensitivity of high temperature ability.4,Comparison to other bonding layer material: synchronous crushed stone bonding layer has high shear strength whether high temperature or low temperature.5,It has got a conclusion through direct shear test: shear strength of synchronous pavement bonding layer > waterproofing roll-roofing > coating film; the biggest shear strength of synchronous pavement bonding layer can reach 2.36 Mpa; [τ]=0.60~0.65 Mpa(normal temperature); [τ]=0.30~0.40 Mpa (heavy temperature).6,Synthesize to load stress , thermal stress as well as fatigue life, suggest that stress between layers under bridge deck pavement working state: [τ]_R≥0.4 Mpa; prove its correctness through direct shear test, can offer some reference for design, construction and choosing material.7,Synthesizing mechanics state and test index analysis of the synchronous pavement bonding layer with other waterproof material layers , synchronous pavement bonding layer has well-performance with the lowest price and the most vast application prospect, along with mechanization process and synchronous pavement surface equipment popularize step by step.