What are the principles of leakage treatment for concrete and mortar masonry dams? What are the meth

The principle of treatment is to solve the problem thoroughly, not only to deal with the water leakage, but also to enhance the overall strength of the dam.

There are several common methods:

Rebuilding clay covering: This method is suitable for the single-layer foundation with good anti-seepage effect of the dam body, but the impervious layer is deep, and the premise is that there is clay near the dam area, and the reservoir needs to be emptied or cofferdam construction. Otherwise, the method of throwing soil in the upstream water or filling muddy water can only be used, but the effect is poor.

Construct clay interception wall or interlocking concrete well column: this method is suitable for the situation that the dam body is of good quality, the impervious layer is shallow and the foundation is not dug to the impervious layer, and the condition is that the reservoir needs to be emptied for construction. When the permeable layer is sand, sandy loam or other weak layers, mortar sheet piles can also be used.

Construction of concrete impermeable walls: This method is suitable for the case of deep permeable layers.

Grouting curtain: This method is suitable for gravel or fine sand foundations, and the reservoir cannot be emptied for construction. According to the fillability of the base material, clay grout, cement grout, clay cement grout or chemical grout can be selected respectively.

Construction of pressure reducing wells or pressure seepage platforms and drainage ditches: This method is suitable for the situation that the foundation has confined water, and the escape slope after the dam is greater than the allowable value or there is a swamping phenomenon.

The principle of treatment is not only to plug the leakage, but also to enhance the overall strength of the dam. The layman sometimes seems to stop the water. However, due to the improper use of construction plans or materials, the overall strength of the dam will be reduced.

It will become a hidden danger of dam failure. The leakage treatment method can be formulated according to the actual situation of the site after looking at the site.

Summary. Kiss! Hello, happy to answer your <>

The types of leakage of pro-concrete dams and masonry dams are as follows: according to the location of leakage, it can be divided into the following types: First, the leakage of the building itself.

Such as leakage caused by cracks, structural joints and expansion joints; the second is the leakage of the building foundation; the third is the leakage of the contact surface between the building and the foundation rock; Fourth, leakage bypassing buildings, such as leakage around dams. (1) Due to poor design, poor temperature control, poor construction quality, crack leakage caused by dam stress exceeding the allowable value, or dam leakage caused by the destruction of waterproof structure. (2) Leakage of the contact surface caused by the poor contact treatment between the concrete dam and the rock.

3) The rocks on both sides of the dam end are not good, and they are not treated when the dam is built, resulting in leakage around the dam after accumulation. (4) Leakage caused by insufficient exploration and design work, such as foundation rock fault fragmentation that has not been treated, or poor treatment; In operation, due to physical and chemical action, the leakage caused by the aging and failure of the anti-leakage curtain is lost. (5) Suffer from strong ** action, causing cracks in the dam or foundation and causing leakage.

Hope mine can help you <>

Do you have any other questions?

What are the types of leakage in concrete dams and masonry dams?

Kiss! Hello, happy to answer your <>

The types of leakage of pro-concrete dams and masonry dams are as follows: according to the location of leakage, it can be divided into the following types: First, the leakage of the building itself.

Such as leakage caused by cracks, structural joints and expansion joints; the second is the leakage of the building foundation; the third is the leakage of the contact surface between the building and the foundation rock; Fourth, leakage bypassing buildings, such as leakage around dams. (1) Due to poor design, poor temperature control, poor construction quality, crack leakage caused by dam stress exceeding the allowable value, or leakage of the dam body formed by the destruction of the waterproof structure. (2) Due to the poor contact treatment between the concrete dam and the rock, the contact surface of the tung burning is leaking.

3) The rocks on both sides of the dam end are not good, and they are not treated when the dam is built, resulting in leakage around the dam after accumulation. (4) Leakage caused by insufficient exploration and design work, such as foundation rock fault fragmentation without treatment, or poor treatment; In operation, due to physical and chemical action, the leakage caused by the aging and failure of the anti-leakage curtain is lost. (5) Suffer from strong ** action, causing cracks in the dam or foundation and causing leakage.

Hope mine can help you <>

Do you have any other questions?

Hurry up. (1) Due to poor design, poor temperature control, poor construction quality, the dam stress exceeds the allowable field value and cracks leakage, or the water-stopping structure is damaged and the dam body leakage is dismantled. (2) Leakage of the contact surface caused by the poor contact treatment between the concrete dam and the rock.

3) The rocks on both sides of the dam end are not good, and they are not treated when the dam is built, resulting in leakage around the dam after accumulation. (4) Leakage caused by insufficient exploration and design work, such as untreated fracture of rock faults in simple and fierce foundations, or poor treatment; In operation, due to physical and chemical action, the leakage caused by the aging and failure of the anti-leakage curtain is lost. (5) Suffer from strong ** action, causing cracks in the dam or foundation and causing leakage.

Answer]: b, e

Analysis] The methods of anti-seepage treatment in the upstream of earth-rock dam include clay inclined wall method, soil throwing and dredging method, grouting method, anti-seepage wall method, and fiber cutting method of the water wall. The methods of seepage prevention treatment in the downstream of earth-rock dam include the seepage diversion ditch method, the slope drainage method, and the seepage ditch destruction method. Therefore, B and E should be selected for this question.

Dear, hello, I am glad to answer for you, the concrete dam around the dam leakage treatment method is as follows; Cement ridge grinding can be used as curtain for mountain rock crushing, and cement grouting or chemical grouting can be used for the development of mountain rock joints and cracks; Karst leakage can be treated by grouting, blocking, interception, covering and downstream drainage and other measures; The downstream of the abutment of the abutment of the bank slope should be used as a diversion and drainage ruler field side facility; The soil bank slope is covered with anti-seepage paving such as backfill cohesive soil in the upstream, and anti-filtration and drainage measures are added to the downstream face.

Answer]: a, b, d

According to the provisions of Article 1 of the Code for the Establishment of Aerial Meters for Roller-Compacted Soil-rock Cracking Blind Dams (DL T 5395-2007), the service life of the anti-seepage wall.

where L is the wall thickness, K is the permeability coefficient, and I is the permeability slope. From the formula, it can be seen that it is necessary to reduce the permeability coefficient, infiltration slope and increase the thickness of the wall to extend the life.

Answer]: Imitation Voltan a, b, e

This question examines the upstream seepage interception method. The upstream seepage interception methods of earth-rock dam include: clay tung soil inclined wall method, soil throwing and dredging method, irrigation hall sail slurry method, seepage wall method and water interception wall (trough) method.

Answer]: The methods of anti-seepage treatment in the upstream of the earth-rock dam include clay inclined wall method, soil throwing and dredging method, grouting method, anti-seepage wall method, water interception wall cluster (trough) method, etc.; The methods of anti-seepage treatment in the downstream of the soil lead cavity rock dam include the infiltration ditch method, the slope drainage method, the seepage ditch method, etc. Therefore, B should be selected for this question.

Answer]: c, e

Analysis] The methods of anti-seepage treatment in the upstream of earth-rock dam include clay inclined wall method, soil throwing and dredging method, grouting method, seepage wall method, water interception wall (trough) method, etc. The methods of seepage prevention treatment in the downstream of earth-rock dam include the seepage ditch method of the trap bridge, the slope drainage method, and the seepage drainage ditch method. Therefore, this question should be selected C, socks are E.