SU1698354A1 - Method of erecting weirs - Google Patents

Abstract

FIELD OF THE INVENTION The invention relates to hydraulic engineering. The purpose of the invention is to expand the functionality of the method by ensuring the passage of construction costs through the unfinished dam and improving the reliability of the dam. With the help of jumpers 1, 2 erect a trench. In the trench, the lower unit 3 is concreted in the summer, the upper unit 4 is erected in the winter from low-cement concrete sludge from a mixture of soil and ground. Poured horse prism 6 of the soil. The first flood is passed through the unfinished pad / shu. The following year, a dam is built. When skipping the second and subsequent floods by the kerkhozi unit 4 of the first or previous tier will be a retaining wall, facilitating the working conditions of the lower concrete block 3 - a temporary weir. After commissioning, the permanent outlets dispense a prism 7 1 sludge.

Description

The invention relates to hydraulic engineering, in particular to the construction of dams, allowing the passage of construction costs through an unfinished structure, mainly in the northern climatic zone.

The purpose of the invention is to expand the functionality of the method by ensuring that construction costs pass through an unfinished dam and increase the reliability of the dam.

The drawing shows a dam, a cross section.

The dam consists of a bottom 1 and top 2 lintels, a bottom concrete block 3, a top block 4, an expansion joint B, a top 6 and a bottom 7 prisms.

The method is as follows.

i Example 1. The riverbed overlaps the low-water period (conditionally the first winter), they pour the lower 1 and upper 2 lintels across the entire width of the channel. Pump out water from the pit. Water ι at this time) is passed, for example, through construction tunnels. In the first summer they prepare the foundation. The lower concrete block 3 is erected from low-cement concrete in layers with a seal. A mixture of incoherent soil with a binder, such as cement, is poured into the riding block 4. In the expansion joint 5, a cohesive soil is laid in layers with a seal. Produce the filling of incoherent soil in the mount prism 6,

In the summer, a predominantly lower concrete block 3 is erected.

In the second winter, the top block 4 is continued to be poured from a mixture of soil with cement, thawed cohesive soil with compaction is poured into the expansion joint 5, incoherent soil is laid into the high prism 6 with zoning in size.

The dam under construction is ready to pass the first flood. In spring, a rise in the water level begins before the uphill slope of the dam. Water filters the upper bridge 2, the upper prism 6, the upper block 4 and stops in front of the expansion joint 5 made of loam and the lower concrete block 3. The last two structural elements in this case are simultaneously a combined anti-filter element, a spillway and a retaining wall. The cement that comes into contact with water begins to hydrate, and the mixture of soil and cement turns into concrete. The absence of washing out of cement milk is ensured by the presence of structural elements 5, 3. As the water level rises before the slope, more and more higher horizons of the upper block 4 are moistened, the soil mixture turns into concrete.

Water begins to overflow through the bottom concrete block 3.

The absence of washing out of cement milk from the upper block 4 at the time of discharge, water is also ensured by the calculated excess of the crest of the lower concrete block 3 over the crest of the upper block 4.

The flood was passed, the upper block 4 became concrete. In the second summer, the lower concrete block 3 from rolled concrete was completed to the calculated height from the condition of the second flood pass. If time permits, pour cohesive soil into the expansion joint 5 layer by layer with compaction, pour a mixture of soil with a binder and incoherent into the upper block 4, soil into the high prism 6.

In the second winter, the upper block 4, the deformation seam 5, the high prism 6 are raised to the design level from the conditions of the second flood pass, the unfinished dam is ready to pass the second flood. The stability of the lower concrete block 3 - retaining wall during the overflow of the second flood is now ensured by the presence of the upper concrete block 4 of the first tier, which ensures the passage of the second flood through the unfinished dam.

We accept that after passing the second flood there is no need to pass construction costs through the unfinished dam.

The dam is completed as follows. In the summer, horse 4 and grassroots 3 concrete blocks are erected from rolled concrete. In the expansion joint 5 pour cohesive soil in layers with a seal. In winter, add a side prism 6 and pour a bottom prism 7.

Example 2. Work is carried out in the first tier of the dam. In summer, a bottom block 3 is erected from rolled concrete, a top block 4 is partially erected from a mixture of soil with a binder, a deformation seam 5 is made of cohesive soil, and a high prism 6 is made of incoherent.

In winter, the 1st tier of the dam is completed: in the upper block 4, low-cement concrete is laid in layers with compaction and frozen at an early age. In the formation seam 5 lay melt cohesive soil with a seal. Add side prism 6, the dam is ready to pass the flood through the ridge. As it rises, it filters the water before the uphill slope through the soil of structural elements 2, 6, filters through the soil layer with cement of the upper block 4 and stops in front of the structural elements 5, 3. Water will not filter through the frozen concrete of the upper block 4 - it is emphasis, providing additional stability to the lower concrete block 3. The frozen mass of the upper block 4 gradually thaws and turns into concrete in the process of raising the level.

Claims (1)

Claim A method of erecting a dam, including the construction of a spillway wall from concrete, characterized in that, in order to expand the functionality of the method by allowing construction expenses to pass through the unfinished dam and to increase the reliability of the dam, the transverse profile of the dam is divided into tiers, with 5 each tier is divided by a longitudinal seam into the upper and lower parts, the dam is erected according to the scheme: at the beginning in the lower part of each tier a spillway wall is erected at a positive air temperature of 10 plotnennogo concrete, and then erected ver-. the main part of the tier at negative air temperature with its subsequent freezing or from a mixture of soil with a hydraulic binder.