Stacking Application And Research Of Water Bag In Small Tonnage Stack Loading Test In Dalian

Static load test with its intuitive, reliable and accurate advantages as the preferred method for determine the bearing capacity of foundation soil, but the discovery in practice, it exists many problems seriously affect the smooth completion of the test. Current static load test of foundation in Dalian as an example, the loading system in the process of handling needs to cooperate with large transport vehicles, energy consumption is not only high transport costs and has done a lot of pollution to the environment;Especially when testing site foundation bearing capacity is insufficient to support large hoisting equipment, rely on artificial alone and unable to complete the test equipment installation, in the test can only be suspended or even unable to complete. So the development of a convenient for transportation, installation, low carbon environmental protection of a new type of small tonnage static load test device is very necessary.In this paper, in order to reduce weight loading system as the starting point, first of all primary and secondary beams in steel design calculation, get a regular loading system; On the basis of the application of carbon fiber aluminum alloy material to the loading platform optimization design, and compared with metal structure design limit load constant and get the utmost reduce weight composite structure, the loading system components can be caused by the weight of the manual handling. Second heap to facilitate the installation of heavy handling to reduce test cost of transportation, this article will traditional concrete blocks such as pile weight change for water bag for loading system to provide the reaction force, and analysis of influencing factors of water bag deformation theory. Using elastic and thin board theory of simplifying the water wall to four edges simply supported plate, and puts forward a quasi rigidity D’to consider the relationship between deformation and water bag. Use of the material mechanics related formula and comply with the measured data of water bag deformation are discussed, according to the calculation and the experimental results, analysis of the water height, material, the influence of the stiffness constraint intensity to be around, get quasi rigidity D’theory of empirical formula, so as to get a theoretical experience formula for computing the water bag wall deformation law and its validation. After the formula derived from the application of the stability of the loading system are calculated, found that lateral deformation limit water bag can effectively improve the stability of the system, put forward water bag design into a meter high of small water bag individually stacked decorate and decorate in horizontal brace the way to improve system stability.End up with a set of water bag to pile weight easy to install new small tonnage static load test device handling. And the water bag as part of a stack in the application of large tonnage static load test has carried on the simple introduction.