Research On The Control Technology And Method Of Deformation Of Deep Foundation Pit Of The Innovative Pre-stressed Support System

Along with the city high-rise construction, the subway project, the municipal engineering as well as the underground spatial development scale increases day by day, hole excavated for building foundation project quantity in recent years sharp growth.Deep big structure excavation and surrounding protection structural design influence factor very many, the environmental protection difficulty more and more is also big.In the deep hole excavated for building foundation project common in will support the supports and protections form mainly for the reinforced concrete support and the steel support, the reinforced concrete support all has the serious environmental pollution in the construction and the demolition process, has originally had the extremely adverse effect to the frail environmental protection, the traditional steel support supports and protections system security is bad, the amount of deformity will be big, the construction cost will be high.Under the engineering intense demand, researched and developed in one kind of new steel structure to support--innovative pre-stressed support system, this kind of supports and protections structure could control the hole excavated for building foundation distortion and the protection peripheral environment, the reduction time limit for a project, also could for the hole excavated for building foundation construction creation big space, reduce the environmental pollution and the realization supports and protections structural unit circulation use, thus realized highly effective, the green environmental protection and the energy conservation reduces a row of goal.In order to analyze this kind of supports and protections structure to the deep hole excavated for building foundation distortion control action, this article emphatically the control technology and the method research which distorted to the deep hole excavated for building foundation has done the thorough research on the innovative pre-stressed support system, the concrete content was as follows:This article the control technology which distorts to the deep hole excavated for building foundation conducts the research on the assembly type pre-stressed fish abdomen joist steel structure support, first the automatic monitor and the early warning technology which distorts from the deep hole excavated for building foundation cut into, have introduced the related hole excavated for building foundation distorts, uses the Midas/GTS value simulation software, through obtains the support endogenic force adjustment to the analogue result analysis to the distortion control function effect; In view of the servo-control and the hand control two kind of endogenic force control method comparison, indicated the servo-control method the control effect is prompt effectively to the distortion.Based on the distortion control technology, elaborated the deep hole excavated for building foundation distortion control method.Theory distorts which based on the pre-stressed control, elaborated the pre-stressed infliction and the adjustment method.Through the determination concrete hole excavated for building foundation distortion control target and the predetermined plan, have given the distortion control specific measures.Finally applies this article research results in two project examples, through to its distortion control effect confirmation and the analysis, proved this article proposed the application of innovative pre-stressed support system controls the technology and the method which the deep hole excavated for building foundation distorts is effective, can obtain the good project effect, has the high practical application value.