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Full-ring Inner-through Lining Formwork Jumbo

CRAC has long been committed to research the lining construction technology and develop the lining formwork jumbo. In 1980s, CRAC has successfully designed a formwork jumbo with variable section. And in recent years, CRAC has undertaken a series of research programs related to lining construction technology and lining equipment, which are assigned by the Ministry of Railways, the Ministry of Science and Technology, Liaoning Provincial Department of Water Resources and China Railway Group Limited. In terms of the research achievements, 2 invention patents and 3 utility model patens are granted and the developed full-ring inner-through lining formwork jumbo has been awarded the 1st prize of Science and Technology Award of China Railway Group and the 1st prize of Technology Innovation Award of CACEM.

And as an important sci-tech industrialization base of CRAC, Chengdu Yanfeng Science and Technology Development Co., Ltd. is focused on the transformation of scientific and technological achievements, by virtue of strong research strength and great achievements in scientific research and technology, excellent design teams, advanced digital design platform and professional service staff, to provide customers with various types of lining formwork jumbos and complete solutions for lining construction.

The product has the following characteristics:
    1. Full-ring monolithic concrete casting can be achieved with dense concrete, smooth surface and with no longitudinal construction joints.

2. All designed functions can be realized by combining hydraulic and electric control with mechanical locking and positioning.

3. Matching equipments like construction vehicle, vent pipe, high-voltage cable, drain pipe, water pipe, etc. for tunnel excavation are allowed to pass through the interior of lining formwork jumbo without any difficulty.   

4. The concrete quality will not be affected by vehicles passing through the trestle during concrete curing.
    5. The parallel operation of full-ring monolithic concrete casting and tunnel excavation is realized successfully and their mutual interference is resolved as well.

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