A concrete construction device at the bottom of a tunnel pressure steel pipe
A penstock and construction device technology, applied in tunnels, shaft equipment, earthwork drilling, etc., can solve the problems of narrow concrete construction operation space, great threat to the normal operation of penstocks, and insufficient pouring at the bottom of penstocks. The risk of sub-cost, the effect of reducing personnel input and labor intensity, and reducing the void rate
Active Publication Date: 2019-08-02
SINOHYDRO BUREAU 14 CO LTD
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Problems solved by technology
Often in the concrete construction at the bottom of the penstock, due to the dense design of structural steel bars and the narrow space for concrete construction, the hose vibrator cannot vibrate along the arc surface of the bottom of the penstock under the action of gravity, resulting in difficult and uneven vibrating construction , not in time and other problems, resulting in insufficient pouring of the bottom of the penstock and a high void rate, which poses a greater threat to the normal operation of the penstock, and the construction efficiency is low, and more labor is invested, resulting in a certain waste of resources and increasing secondary construction costs
Method used
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[0023] The present invention will be further described in detail below in conjunction with the examples.
[0024] Those skilled in the art will understand that the following examples are only for illustrating the present invention and should not be considered as limiting the scope of the present invention. If no specific technique or condition is indicated in the examples, it shall be carried out according to the technique or condition described in the literature in this field or according to the product specification. The reagents or instruments used were not indicated by the manufacturer, and they were all conventional products that could be purchased.
[0025] Such as Figure 1-6 As shown, a tunnel penstock bottom concrete construction device mainly includes a penstock 4, a penstock stiffening ring 7, a longitudinal structural reinforcement 8, a circumferential structural reinforcement 9, self-compacting concrete 2, and a vibrating guide cage 3; The stiffening ring 7 is o...
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The invention discloses a constructing device for bottom concrete of a tunnel pressure steel pipe. The constructing device comprises a pressure steel pipe and is characterized by also comprising a pressure steel pipe stiffening ring, longitudinal structural reinforcing bars, an annular structural reinforcing bar, self-compacting concrete and vibrating guide cages; the pressure steel pipe stiffening ring is arranged outside the pressure steel pipe; the annular structural reinforcing bar is arranged at an outer ring of the pressure steel pipe stiffening ring; the longitudinal structural reinforcing bars are axially arranged in the self-compacting concrete; the annular structural reinforcing bar and the longitudinal structural reinforcing bars are bound and fixed; the vibrating guide cages are arranged in the self-compacting concrete, are welded and fixed with the longitudinal structural reinforcing bars and are close to the pressure steel pipe stiffening ring; and each vibrating guide cage is formed by connecting longitudinal round steels with an annular round steel. The constructing device for the bottom concrete of the tunnel pressure steel pipe, disclosed by the invention, is applied to construction of the bottom concrete of a large-sized pressure impact resisting tunnel pressure steel pipe; and the pouring efficiency of the concrete and the fullness of the bottom of the pressure steel pipe are improved to a great degree.
Description
technical field [0001] The invention relates to the technical field of water conservancy and hydropower engineering, in particular to a concrete construction device at the bottom of a tunnel pressure steel pipe. Background technique [0002] In the construction of water conservancy and hydropower projects, there are various functional or structural large-scale pressure-resistant impact tunnels, such as diversion tunnels in water conservancy and hydropower projects. Usually, pressure steel pipes are installed after the excavation of pressure-resistant impact tunnels, and penstock steel pipes After the installation is completed, the penstock steel lined concrete construction is required. With the maturity and development of the existing technology, most of the penstock steel linings of pressure-resistant and impact tunnels are made of natural steel with high strength, good fluidity and workability. Dense concrete construction. Often in the concrete construction at the bottom ...
Claims
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IPC IPC(8): E21D11/10E21D11/14
CPCE21D11/10E21D11/107E21D11/14
Inventor 偰光恒张永岗杨元红姚巍杨育礼赵智勇何玉虎周维黄金凤孙智刚单亚洲何文虎杨海洋
Owner SINOHYDRO BUREAU 14 CO LTD