Research On The Application Of GRC Concrete Formwork Suspending On The Bolt In Tunnel Supports And Protections

At present the most important is the template wooden template, followed by the steel template in the various housing construction. The annual template for the construction of timber is about eight million cubic meters According to the statistics showed in China. And one of the laminated wood joinery wrenches and wrenches which is most of shrubs and trees in production. The felling of large shrub forest vegetation caused soil erosion mountain landslides and other major natural disasters.Therefore we have to use a lot of construction timber for a thorough transformation from a long-term interests and the people's livelihood.This paper studies how to use the precast concrete to replace the traditional template template and a study on a kind of template supporting which is simple assembly of the demolished building concrete structures in many occasions. This article technical point is the change existing tunnel supports and protections structure construction way, the few uses or do not use the steel die trolley, and uses prefabricated the concretes template to replace the steel template.Carries on the mold note concrete construction to the anchor rod suspension law to carry on the structural design and the computation.The precast concrete template uses the GRC thin steel plate, namely take the cement as the binder, the thin river sand as the stopping, the glass fiber to strengthen the material. Experiments through many groups, the definite concretes template's water ratio and the glass fiber mixes in the quantity. Because the concretes template is the brittle material, the lateral pressure oversized will cause the concretes template dehiscence, therefore should control the concretes template's support spacing, and increased the steel bar in the manufacture concretes template process net, will enhance the concretes template anti-curved, the anti-booklet performance. Inundates the highway near drainage tunnel's field test take business as the basis, elaborated in detail the concretes template's production process, as well as uses the anchor rod suspension the way to carry on the mold note concrete construction the technical process. This topic uses the anchor rod suspension's way erects the GRC concretes template, erects in the template in process enormous reduced manpower and physical resource loss and waste, only may complete through the minority several worker's coordination coordination, might be possible to implement on the simple steel frame, has saved the space, also saved the cost. After the construction completes, the mold builds the concretes with the exterior GRC template, the anchor rod, the carrier combined action, becomes a whole, combined action into tunnel adjacent formation permanent supports and protections.