A Method for Determining the Seepage Pressure of the Sliding Surface of the Bottom Sliding Block of the Arch Dam Abutment Sliding Block

Abstract

The invention belongs to the technical field of dam abutment slopes and mainly relates to a determining method of arch dam abutment sliding block body bottom sliding face water seepage pressure. A similar mathematical integral mode is adopted, finally, summation is performed after subdivision calculation is performed on a bottom sliding face, the problems that according to a traditional method, errors are large when the shape of the bottom sliding face is irregular, and usually, the calculation result is not ideal enough are avoided, and the calculation result of the bottom sliding face water seepage pressure is more accurate; the portion, not directly intersecting with the upstream pull-open face, of the upper edge of the bottom sliding face and the portion, directly intersecting with the upstream pull-open face, of the upper edge of the bottom sliding face are calculated separately, finally, summation is performed, and the calculation result is more accurate. Besides, due to the method, display can be completely achieved through a computer, and all data is converted into area and volume with shape and size and is more visual.

Description

Technical field

[0001] The invention belongs to the technical field of dam abutment slopes, and mainly relates to a method for determining the seepage pressure of the bottom sliding surface of the sliding block of the arch dam abutment. Background technique

[0002] The effect of seepage pressure is a factor that cannot be ignored in the analysis and calculation of the slope stability of the arch dam abutment. When calculating the seepage pressure of the bottom slip surface, the traditional method is to compare the length of three times the arch end with the length of the corresponding bottom slip surface. The small value is calculated.

[0003] Since the bottom sliding surface is often a spatial curved surface, the length of the bottom sliding surface cannot be obtained intuitively. At the same time, for the part of the bottom sliding surface that does not directly intersect the upstream pull surface, this approach often has certain calculation errors, making The calculation resu...

Examples

Embodiment 1

[0028] This embodiment provides a method for determining the seepage pressure of the bottom sliding surface of the sliding block of the arch dam abutment, combining Figure 1-Figure 5 As shown, including the following steps:

[0029] Step 1): According to a certain step value, a straight line perpendicular to the intersection line 5 between the upstream stretched surface and the bottom sliding surface is taken as the bottom sliding surface dividing line 7 to split the bottom sliding surface 3 directly intersecting the upstream stretched surface Part, the part of the bottom sliding surface 3 that directly intersects with the upstream pull surface is split to form a layered structure;

[0030] Step 2): According to the layering result of step 1), each layer will form a split unit 8. The hydrostatic pressure at the upstream end of the upper sliding surface of the split unit 8 is obtained, and the curtain line is obtained according to the hydrostatic pressure at the upstream end of the...

Embodiment 2

[0038] On the basis of embodiment 1, this embodiment will be described in further detail. The method for determining the seepage pressure of the bottom sliding surface of the arch dam abutment sliding block in this embodiment is described with a specific three-dimensional block 1, which specifically includes The following steps:

[0039] Step 1): such as figure 2 with image 3 As shown, the part of the bottom sliding surface 3 that directly intersects with the upstream pulling surface is divided by a straight line 7 perpendicular to the intersection line 5 between the upstream pull-out surface and the bottom sliding surface according to the 1m step length value, and the bottom sliding surface 3 is The part that directly intersects with the upstream drawing surface is divided to form a layered structure. The specific step value and division direction in this step can be divided by itself, and the actual needs of the site shall prevail.

[0040] Step 2): According to the stratificat...

Technical field

[0001] The invention belongs to the technical field of dam abutment slopes, and mainly relates to a method for determining the seepage pressure of the bottom sliding surface of the sliding block of the arch dam abutment. Background technique

[0002] The effect of seepage pressure is a factor that cannot be ignored in the analysis and calculation of the slope stability of the arch dam abutment. When calculating the seepage pressure of the bottom slip surface, the traditional method is to compare the length of three times the arch end with the length of the corresponding bottom slip surface. The small value is calculated.

[0003] Since the bottom sliding surface is often a spatial curved surface, the length of the bottom sliding surface cannot be obtained intuitively. At the same time, for the part of the bottom sliding surface that does not directly intersect the upstream pull surface, this approach often has certain calculation errors, making The calculation resu...

Examples

Embodiment 1

[0028] This embodiment provides a method for determining the seepage pressure of the bottom sliding surface of the sliding block of the arch dam abutment, combining Figure 1-Figure 5 As shown, including the following steps:

[0029] Step 1): According to a certain step value, a straight line perpendicular to the intersection line 5 between the upstream stretched surface and the bottom sliding surface is taken as the bottom sliding surface dividing line 7 to split the bottom sliding surface 3 directly intersecting the upstream stretched surface Part, the part of the bottom sliding surface 3 that directly intersects with the upstream pull surface is split to form a layered structure;

[0030] Step 2): According to the layering result of step 1), each layer will form a split unit 8. The hydrostatic pressure at the upstream end of the upper sliding surface of the split unit 8 is obtained, and the curtain line is obtained according to the hydrostatic pressure at the upstream end of the...

Embodiment 2

[0038] On the basis of embodiment 1, this embodiment will be described in further detail. The method for determining the seepage pressure of the bottom sliding surface of the arch dam abutment sliding block in this embodiment is described with a specific three-dimensional block 1, which specifically includes The following steps:

[0039] Step 1): such as figure 2 with image 3 As shown, the part of the bottom sliding surface 3 that directly intersects with the upstream pulling surface is divided by a straight line 7 perpendicular to the intersection line 5 between the upstream pull-out surface and the bottom sliding surface according to the 1m step length value, and the bottom sliding surface 3 is The part that directly intersects with the upstream drawing surface is divided to form a layered structure. The specific step value and division direction in this step can be divided by itself, and the actual needs of the site shall prevail.

[0040] Step 2): According to the stratificat...

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