Highest concrete panel rockfill dam under construction

Xinjiang Dashi Gorge Water Conservancy Hub Project is one of the mountainous control backbone hub projects planned and constructed in the Tarim River Basin, one of the 172 major water conservation and water supply projects identified by the State Council of China, and one of the first 12 PPP pilot major water conservancy projects contacted at the national level. With a total construction period of 102 months, the project started in December 2017 and is expected to be completed in October 2026. At present, the dam has been filled to an elevation of 1521.6 meters Xinjiang Dashi Gorge Water Conservancy Hub Project is under intense construction, high toe pier has completed foundation excavation, the end of August to complete the high toe pier concrete pouring; the end of December the dam will be filled to an elevation of 1545 meters, the realization of the dam filled to an elevation of 85 meters.

What materials are needed to build a water conservancy dam?

As we all know, the most important material for building water conservancy dams is concrete. In addition to adequate strength, concrete requires a certain degree of impermeability, erosion resistance, frost resistance, abrasion resistance and low heat resistance.

According to the compressive strength, hydraulic concrete is divided into C5 C7.5 C10 C15 C20 C25 C30 standard, C5 can only be used in some unimportant, stress very small parts, as backfill and compression weight. Dam concrete compressive design strength of the age of the general use of 90d, up to 180d, but also provides 28d age of the compressive strength shall not be less than 7.5Mpa. design tensile strength of the age of the 28d, generally do not use the late strength.

The construction of dams is also very strict on the requirements of concrete, and concrete is mainly composed of water, sand, gravel, cement. This has higher requirements for sand and gravel aggregates. After all, the quality of sand and gravel aggregate greatly affects the quality of concrete. How exactly do we produce suitable sand and gravel aggregate for dam projects? Let us explore together.

How to produce high-quality sand and gravel aggregate to protect the dam construction?

1) High quality mother rock

The construction of the dam is mainly to intercept the reservoir, so the dam needs to be strong concrete pressure resistance, anti-permeability. When we choose sandstone mother rock, we can choose granite, quartzite and other volcanic or metamorphic rocks. Volcanic rock, metamorphic rock because of its composition of feldspar, plagioclase feldspar, quartz, its resistance to corrosion, acid and alkali insoluble in water, so it is a high-quality mother rock material for building dam concrete materials.

2) Production line equipment

With high quality mother rock, we also need high quality crushing production equipment. For rock crushing, establishing a gravel production line is the first step.

The gravel production line is composed of different equipment. Generally the crushing production line consists of vibrating feeder - jaw crusher - cone crusher - conveyor belt -Impact sand making machine -Sand washing machine and so on.

Modern sand and gravel production at least three crushing process in order to produce good quality sand and gravel aggregates, some high-quality sand and gravel Chamber of Commerce will pay special attention to the intelligent production equipment, environmental protection performance, to achieve the unity of production capacity and the environment.

3) Management technology

In addition to the mother rock, production line equipment, to produce high-quality sand and gravel aggregate is also inseparable from the advanced management technology. Due to the engineering side of the sand and gravel particle size, fineness modulus and other requirements, after the production also needs to be equipped with advanced intelligent management equipment, timely detection of sand and gravel is in line with the requirements of the hard indicators.

The construction of Xinjiang Dashi Gorge Water Conservancy Hub Project is in full swing, which is of great significance for the water resources allocation in the Tarim River Basin. Although the construction of this water conservancy project is arduous, but things are people. I believe that with the support of high-quality sand and gravel aggregate, a strong barrier will be erected to the dam construction, thus benefiting the residents of Xinjiang.

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