CN117286842A - Asphalt concrete core wall dam - Google Patents
Asphalt concrete core wall dam Download PDFInfo
- Publication number
- CN117286842A CN117286842A CN202311261902.6A CN202311261902A CN117286842A CN 117286842 A CN117286842 A CN 117286842A CN 202311261902 A CN202311261902 A CN 202311261902A CN 117286842 A CN117286842 A CN 117286842A
- Authority
- CN
- China
- Prior art keywords
- asphalt concrete
- concrete core
- asphalt
- dam
- core wall
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000011384 asphalt concrete Substances 0.000 title claims abstract description 204
- 239000010426 asphalt Substances 0.000 claims abstract description 109
- 230000007704 transition Effects 0.000 claims abstract description 86
- 238000011144 upstream manufacturing Methods 0.000 claims abstract description 84
- 239000004570 mortar (masonry) Substances 0.000 claims abstract description 80
- 230000035699 permeability Effects 0.000 claims abstract description 27
- 238000010276 construction Methods 0.000 claims abstract description 26
- 239000000945 filler Substances 0.000 claims abstract description 18
- 238000000034 method Methods 0.000 claims abstract description 15
- 239000010410 layer Substances 0.000 claims description 199
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 33
- 239000000203 mixture Substances 0.000 claims description 11
- 239000002245 particle Substances 0.000 claims description 11
- 239000004567 concrete Substances 0.000 claims description 7
- 239000004576 sand Substances 0.000 claims description 6
- 238000000926 separation method Methods 0.000 claims description 5
- 239000002356 single layer Substances 0.000 claims description 5
- 230000004888 barrier function Effects 0.000 claims 4
- 230000035515 penetration Effects 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 2
- 239000011257 shell material Substances 0.000 description 58
- 239000011150 reinforced concrete Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000013521 mastic Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B7/00—Barrages or weirs; Layout, construction, methods of, or devices for, making same
- E02B7/02—Fixed barrages
- E02B7/04—Dams across valleys
- E02B7/08—Wall dams
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02B—HYDRAULIC ENGINEERING
- E02B3/00—Engineering works in connection with control or use of streams, rivers, coasts, or other marine sites; Sealings or joints for engineering works in general
- E02B3/16—Sealings or joints
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A10/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE at coastal zones; at river basins
- Y02A10/11—Hard structures, e.g. dams, dykes or breakwaters
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- Mechanical Engineering (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Ocean & Marine Engineering (AREA)
- Road Paving Structures (AREA)
Abstract
The invention provides an asphalt concrete core wall dam which comprises an upstream dam shell area, an upstream transition layer, an asphalt concrete core wall, a downstream transition layer, a downstream dam shell area and a dam foundation transition layer, wherein the upstream transition layer is arranged on the upstream dam shell area; the asphalt concrete core wall comprises an asphalt concrete core wall body and an asphalt mortar layer. Has the following advantages: the coarse aggregate with larger grain diameter and larger content, a small amount of filler and a small amount of asphalt are adopted to prepare the open-graded asphalt concrete with larger permeability coefficient, and the open-graded asphalt concrete is used as a core wall supporting layer, so that the transition effect between the core wall and a transition layer is achieved while the core wall seepage-proofing body of the asphalt concrete is supported, the consumption of the close-graded asphalt concrete is greatly reduced, and the engineering investment is saved; the asphalt mortar layer with the trapezoid structure is directly connected with the dam foundation and the bank slopes on two sides, and is constructed with the asphalt concrete core wall seepage-proofing body and the asphalt concrete core wall supporting layer simultaneously, so that the dam body seepage-proofing structure and the construction procedure are greatly simplified, the seepage-proofing quality of the core wall dam is ensured, the construction period is shortened, and the asphalt concrete core wall dam has wide guiding and popularization significance.
Description
Technical Field
The invention relates to the technical field of water conservancy and hydropower engineering, in particular to an asphalt concrete core wall dam.
Background
At present, only one layer of closely graded asphalt concrete is used as an impermeable body of the asphalt concrete core wall, and the thickness is thicker; the transition layers are arranged on the two sides of the core wall and are in transition with the dam shell materials, but the transition layers are generally broken stone or sand gravel, and the maximum particle size and grading of the transition layers are still greatly different from those of raw materials used by asphalt concrete, so that the deformation coordination of the transition layers and the dam shell materials is poor, and the core wall is possibly damaged. In addition, the asphalt concrete core wall end needs to be amplified, is connected with the dam foundation and the two-bank slopes through the reinforced concrete cushion, and water stop and asphalt mastic are buried and paved at the joint of the asphalt concrete core wall and the reinforced concrete cushion, and the impermeable bodies of the reinforced concrete cushion, the dam foundation and the two-bank slopes, so that the impermeable structure and the construction process of the dam body are complex, and the impermeable quality and the construction period of the core wall dam are difficult to guarantee.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention provides an asphalt concrete core wall dam which can effectively solve the problems.
The technical scheme adopted by the invention is as follows:
the invention provides an asphalt concrete core wall dam which comprises an upstream dam shell area (1), an upstream transition layer (2), an asphalt concrete core wall (3), a downstream transition layer (4), a downstream dam shell area (5) and a dam foundation transition layer (6);
along the water flow direction, the upstream dam shell area (1), the upstream transition layer (2), the asphalt concrete core wall (3), the downstream transition layer (4) and the downstream dam shell area (5) are sequentially arranged on the surface of the dam foundation (7); wherein the dam foundation transition layer (6) is paved at the position where the surface of the dam foundation (7) is contacted with the upstream dam shell area (1) and at the position where the surface of the dam foundation (7) is contacted with the downstream dam shell area (5);
wherein: the asphalt concrete core wall (3) comprises an asphalt concrete core wall main body and an asphalt mortar layer (3.4); wherein the asphalt mortar layer (3.4) comprises an integrally formed bottom asphalt mortar layer (3.4.1) and an end asphalt mortar layer (3.4.2); the asphalt concrete core wall main body comprises an asphalt concrete core wall upstream supporting layer (3.1), an asphalt concrete core wall impermeable body (3.2) and an asphalt concrete core wall downstream supporting layer (3.3) which are sequentially arranged along the water flow direction; the bottom of the asphalt concrete core wall main body is integrally formed with the bottom asphalt mortar layer (3.4.1), and the other end of the bottom asphalt mortar layer (3.4.1) is contacted with the upper part of a dam foundation seepage-proofing body (9) of the dam foundation (7); the asphalt concrete core wall body is characterized in that the two ends of the asphalt concrete core wall body are respectively integrally formed with the end asphalt mortar layer (3.4.2), and the other end of the end asphalt mortar layer (3.4.2) is in contact with two bank slope seepage-proofing bodies (10) of two bank slopes (8).
Preferably, the upstream transition layer (2) and the downstream transition layer (4) adopt a single-layer or multi-layer structure along the water flow direction according to the dam characteristics of the upstream dam shell area (1) and the downstream dam shell area (5), so as to meet the deformation transition requirement between the asphalt concrete core wall (3) and the upstream dam shell area (1) and the deformation transition requirement between the asphalt concrete core wall (3) and the downstream dam shell area (5), and have drainage property, permeability stability and bearing capacity meeting construction requirements.
Preferably, the thickness of each elevation of the asphalt concrete core wall seepage-proofing body (3.2) can be thinned, but the top width is not less than 20cm;
the asphalt concrete core wall seepage-proofing body (3.2) adopts dense graded asphalt concrete, the porosity is not more than 3%, the water stability coefficient is not less than 0.9, and the permeability coefficient is not more than 1 multiplied by 10 -8 The method comprises the steps of carrying out a first treatment on the surface of the The mass content of the asphalt is 6-7.5%, the mass content of the filler is 11-13%, the mass content of the coarse aggregate is 35-55%, and the maximum particle size is 16-19 mm.
Preferably, the thickness of each elevation of the asphalt concrete core wall upstream supporting layer (3.1) and the asphalt concrete core wall downstream supporting layer (3.3) is not smaller than the thickness of the corresponding elevation of the asphalt concrete core wall seepage-proofing body (3.2);
the asphalt concrete core wall upstream support layer (3.1) and the asphalt concrete core wall downstream support layer (3.3) adopt open graded asphalt concrete, the porosity is 10% -15%, the water stability coefficient is not less than 0.85, and the permeability coefficient is 1 multiplied by 10 -2 ～1×10 -4 The method comprises the steps of carrying out a first treatment on the surface of the The mass content of the asphalt is 3.5-5%, the mass content of the filler is 6-8%, the mass content of the coarse aggregate is 60-80%, and the maximum particle size is larger than 19mm but smaller than 40mm.
Preferably, the length of the asphalt mortar layer (3.4) is 1.5 m-3.0 m;
the bottom asphalt mortar layer (3.4.1) is of a trapezoid structure, the top initial end face of the bottom asphalt mortar layer is completely butted with the bottom face of the asphalt concrete core wall main body, and the side length of the top initial end face of the bottom asphalt mortar layer is the thickness of the asphalt concrete core wall main body at the corresponding elevation; the bottom end face of the dam foundation seepage-proofing body (9) is contacted with the side length of the dam foundation seepage-proofing body is 2-3 times of the side length of the top initial end face;
the end asphalt mortar layer (3.4.2) is of a trapezoid structure, the top initial end face of the end asphalt mortar layer is completely butted with the side end face of the asphalt concrete core wall main body, and the side length of the top initial end face of the end asphalt mortar layer is the thickness of the corresponding elevation of the asphalt concrete core wall main body; the bottom end surface of the anti-seepage body is contacted with the anti-seepage body (10) of the bank slope of the two banks, and the side length of the anti-seepage body is 2-3 times of the side length of the top initial end surface.
Preferably, the porosity of the asphalt mortar layer (3.4) is not more than 2%, the water stability coefficient is not less than 0.9, and the permeability coefficient is not more than 1×10 -8 The construction viscosity is not less than 10 3 ～10 4 Pa·s, the degree of separation is not more than 1.05; the mass content of the asphalt is 12-18%, the mass content of the filler is 15-30%, and the mass content of the sand is 55-70%.
Preferably, the thickness of the dam foundation transition layer (6) is 1.0 m-2.0 m, the deformation transition requirement between the upstream dam shell area (1) and the dam foundation (7) and the deformation transition requirement between the downstream dam shell area (5) and the dam foundation (7) are met, and the dam foundation has drainage property, permeability stability and bearing capacity meeting construction requirements.
Preferably, the dam foundation seepage-proofing body (9) and the two-bank slope seepage-proofing body (10) are concrete seepage-proofing walls or seepage-proofing curtain structures.
Preferably, the asphalt concrete core wall upstream supporting layer (3.1), the asphalt concrete core wall seepage-proofing body (3.2), the asphalt concrete core wall downstream supporting layer (3.3) and the asphalt mortar layer (3.4) are constructed simultaneously, and asphalt mixture is paved and rolled layer by layer;
the paving thickness of the asphalt mixture is 25 cm-30 cm, the outlet temperature is 160-190 ℃, the warehouse entry temperature is 150-170 ℃, the initial grinding temperature is 140-160 ℃, and the final grinding temperature is not lower than 110 ℃; the surface temperature of the upper layer is 70-100 ℃ during continuous paving.
Preferably, the upstream transition layer (2) and the downstream transition layer (4) are synchronously constructed with the asphalt concrete core wall (3) and are filled with the upstream dam shell area (1) and the downstream dam shell area (5) in a flat mode.
The asphalt concrete core wall dam provided by the invention has the following advantages:
1) The coarse aggregate with larger grain diameter and larger content, a small amount of filler and a small amount of asphalt are adopted to prepare the open-graded asphalt concrete with larger permeability coefficient, and the open-graded asphalt concrete is used as a core wall supporting layer, so that the transition effect between the core wall and a transition layer is achieved while the core wall seepage-proofing body of the asphalt concrete is supported, the consumption of the close-graded asphalt concrete is greatly reduced, and the engineering investment is saved;
2) The asphalt mortar layer with the trapezoid structure is directly connected with the dam foundation and the bank slopes on two sides, and is constructed with the asphalt concrete core wall seepage-proofing body and the asphalt concrete core wall supporting layer simultaneously, so that the dam body seepage-proofing structure and the construction procedure are greatly simplified, the seepage-proofing quality of the core wall dam is ensured, the construction period is shortened, and the asphalt concrete core wall dam has wide guiding and popularization significance.
Drawings
FIG. 1 is a schematic plan view of an asphalt concrete core dam of the present invention;
FIG. 2 is a section A-A of a schematic plan view of an asphalt concrete core dam of the present invention;
FIG. 3 is a section B-B of a schematic plan view of an asphalt concrete core dam of the present invention;
FIG. 4 is a detail drawing A of a schematic plan view of an asphalt concrete core dam of the present invention;
FIG. 5 is a detail view B of a section A-A of a schematic plan view of an asphalt concrete core dam according to the present invention;
wherein:
1-an upstream dam hull section; 2-an upstream transition layer; 3-asphalt concrete core wall; 4-a downstream transition layer; 5-downstream dam hull section; 6-a dam foundation transition layer; 7-dam foundation; 8-two bank slopes; 9-dam foundation seepage-proofing body; 10-two bank slope seepage prevention bodies;
3.1-an asphalt concrete core wall upstream support layer; 3.2-asphalt concrete core wall seepage-proofing body; 3.3-a downstream support layer of the asphalt concrete core wall; 3.4-asphalt mortar layer; 3.4.1-a bottom asphalt mortar layer; 3.4.2-end asphalt mortar layer;
the direction indicated by the arrow is the direction of water flow.
Detailed Description
In order to make the technical problems, technical schemes and beneficial effects solved by the invention more clear, the invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the invention.
The invention aims to provide an asphalt concrete core wall dam, which adopts open graded asphalt concrete as a core wall supporting layer and adopts an asphalt mortar layer with a trapezoid structure to be directly connected with a dam foundation and two bank slopes, so that the problems that the core wall is thick in the traditional scheme, poor in deformation coordination with a transition layer and possibly damaged are solved; and the dam body seepage-proofing structure and the construction process are complex, and the seepage-proofing quality and the construction period of the core wall dam are difficult to ensure.
Referring to fig. 1 to 5, the present invention provides an asphalt concrete core dam, comprising an upstream dam shell area 1, an upstream transition layer 2, an asphalt concrete core wall 3, a downstream transition layer 4, a downstream dam shell area 5 and a dam foundation transition layer 6;
along the water flow direction, the upstream dam shell area 1, the upstream transition layer 2, the asphalt concrete core wall 3, the downstream transition layer 4 and the downstream dam shell area 5 are sequentially arranged on the surface of the dam foundation 7; wherein the dam foundation transition layer 6 is paved at the position where the surface of the dam foundation 7 is contacted with the upstream dam shell area 1 and the position where the surface of the dam foundation 7 is contacted with the downstream dam shell area 5;
wherein: the asphalt concrete core wall 3 comprises an asphalt concrete core wall body and an asphalt mortar layer 3.4; wherein the asphalt mortar layer 3.4 comprises an integrally formed bottom asphalt mortar layer 3.4.1 and an end asphalt mortar layer 3.4.2; the asphalt concrete core wall main body comprises an asphalt concrete core wall upstream supporting layer 3.1, an asphalt concrete core wall seepage-proofing body 3.2 and an asphalt concrete core wall downstream supporting layer 3.3 which are sequentially arranged along the water flow direction; the bottom of the asphalt concrete core wall main body is integrally formed with the bottom asphalt mortar layer 3.4.1, and the other end of the bottom asphalt mortar layer 3.4.1 is contacted with the upper part of a dam foundation seepage-proofing body 9 of the dam foundation 7; the asphalt mortar layer 3.4.2 at the end is integrally formed at both ends of the asphalt concrete core wall body, and the other end of the asphalt mortar layer 3.4.2 is in contact with the two-shore bank slope seepage-proofing body 10 of the two-shore bank slope 8.
According to the invention, the upstream transition layer 2 and the downstream transition layer 4 adopt a single-layer or multi-layer structure along the water flow direction according to the dam characteristics of the upstream dam shell area 1 and the downstream dam shell area 5, thereby meeting the deformation transition requirements between the asphalt concrete core wall 3 and the upstream dam shell area 1 and between the asphalt concrete core wall 3 and the downstream dam shell area 5, and having good drainage property, permeability stability and bearing capacity meeting construction requirements.
In the invention, the thickness of each elevation of the asphalt concrete core wall seepage-proofing body 3.2 can be thinned, and can be specifically 1/3-1/2 of the thickness of the conventional engineering design, but the top width is not less than 20cm; the asphalt concrete core wall seepage-proofing body 3.2 adopts dense graded asphalt concrete, the porosity is not more than 3%, the water stability coefficient is not less than 0.9, and the permeability coefficient is not more than 1 multiplied by 10 -8 The method comprises the steps of carrying out a first treatment on the surface of the The mass content of the asphalt is 6-7.5%, the mass content of the filler is 11-13%, the mass content of the coarse aggregate is 35-55%, and the maximum particle size is 16-19 mm.
The thickness of each elevation of the asphalt concrete core wall upstream supporting layer 3.1 and the asphalt concrete core wall downstream supporting layer 3.3 is not smaller than the thickness of the asphalt concrete core wall seepage-proofing body 3.2 at the corresponding elevation;
the asphalt concrete core wall upstream support layer 3.1 and the asphalt concrete core wall downstream support layer 3.3 adopt open graded asphalt concrete, the porosity is 10% -15%, the water stability coefficient is not less than 0.85, and the permeability coefficient is 1 multiplied by 10 -2 ～1×10 -4 The method comprises the steps of carrying out a first treatment on the surface of the The mass content of the asphalt is 3.5-5%, the mass content of the filler is 6-8%, the mass content of the coarse aggregate is 60-80%, and the maximum particle size is larger than 19mm but smaller than 40mm.
In the invention, the length of the asphalt mortar layer 3.4 is 1.5 m-3.0 m; the bottom asphalt mortar layer 3.4.1 is of a trapezoid structure, the top initial end face of the bottom asphalt mortar layer is completely butted with the bottom face of the asphalt concrete core wall main body, and the side length of the top initial end face of the bottom asphalt mortar layer is the thickness of the corresponding elevation of the asphalt concrete core wall main body; the bottom end face of the dam foundation seepage-proofing body is contacted with the dam foundation seepage-proofing body 9, and the side length of the dam foundation seepage-proofing body is 2-3 times of the side length of the top initial end face;
the end asphalt mortar layer 3.4.2 is of a trapezoid structure, the top initial end face of the end asphalt mortar layer 3.4.2 is completely butted with the side end face of the asphalt concrete core wall main body, and the side length of the top initial end face of the end asphalt mortar layer 3.4.2 is the thickness of the asphalt concrete core wall main body at the corresponding height; the bottom end face contacts with the two bank slope seepage-proofing bodies 10, and the side length is 2-3 times of the side length of the top initial end face.
The porosity of the asphalt mortar layer 3.4 is not more than 2%, the water stability coefficient is not less than 0.9, and the permeability coefficient is not more than 1×10 -8 The construction viscosity is not less than 10 3 ～10 4 Pa·s, the degree of separation is not more than 1.05; the mass content of the asphalt is 12-18%, the mass content of the filler is 15-30%, and the mass content of the sand is 55-70%.
In the invention, the thickness of the dam foundation transition layer 6 is 1.0 m-2.0 m, the deformation transition requirement between the upstream dam shell area 1 and the dam foundation 7 is met, and the deformation transition requirement between the downstream dam shell area 5 and the dam foundation 7, and has good drainage property, permeability stability and bearing capacity meeting construction requirements.
In the invention, the dam foundation seepage-proofing body 9 and the two-bank slope seepage-proofing body 10 are structures such as a concrete seepage-proofing wall or a seepage-proofing curtain.
In the concrete construction, the asphalt concrete core wall upstream support layer 3.1, the asphalt concrete core wall seepage-proofing body 3.2, the asphalt concrete core wall downstream support layer 3.3 and the asphalt mortar layer 3.4 are constructed simultaneously, and asphalt mixture is paved and rolled layer by layer;
the paving thickness of the asphalt mixture is 25 cm-30 cm, the outlet temperature is 160-190 ℃, the warehouse entry temperature is 150-170 ℃, the initial grinding temperature is 140-160 ℃, and the final grinding temperature is not lower than 110 ℃; the surface temperature of the upper layer is 70-100 ℃ during continuous paving.
And the upstream transition layer 2 and the downstream transition layer 4 are synchronously constructed with the asphalt concrete core wall 3 and are filled with the upstream dam shell area 1 and the downstream dam shell area 5 in a flat mode.
As shown in fig. 1-5, the invention provides an asphalt concrete core dam, wherein the dam body consists of an upstream dam shell area 1, an upstream transition layer 2, an asphalt concrete core wall 3, a downstream transition layer 4, a downstream dam shell area 5 and a dam foundation transition layer 6 along the water flow direction;
the asphalt concrete core wall 3 comprises an asphalt concrete core wall upstream supporting layer 3.1, an asphalt concrete core wall seepage-proofing body 3.2, an asphalt concrete core wall downstream supporting layer 3.3 along the water flow direction, and asphalt mortar 3.4 at the contact part of the transverse river direction with the dam foundation 7 and the bank slopes 8 of the two banks;
constructing an asphalt concrete core wall upstream support layer 3.1, an asphalt concrete core wall seepage-proofing body 3.2, an asphalt concrete core wall downstream support layer 3.3 and asphalt mortar 3.4 simultaneously;
the upstream transition layer 2 and the downstream transition layer 4 are synchronously constructed with the asphalt concrete core wall 3 and are filled with the upstream dam shell area 1 and the downstream dam shell area 5 in a flat mode.
The upstream transition layer 2 and the downstream transition layer 4 can adopt single layers or multiple layers along the water flow direction according to the dam characteristics of the upstream dam shell area 1 and the downstream dam shell area 5, meet the transition requirement of deformation between the asphalt concrete core wall 3 and the upstream dam shell area 1 and the downstream dam shell area 5, and have good drainage property, permeability stability and bearing capacity meeting construction requirements.
The thickness of the asphalt concrete core wall seepage-proofing body 3.2 is 1/3-1/2 of the thickness of the conventional engineering design, but the top width is not less than 20cm;
the asphalt concrete core wall seepage-proofing body 3.2 adopts dense graded asphalt concrete, the porosity is not more than 3%, the water stability coefficient is not less than 0.9, and the permeability coefficient is not more than 1 multiplied by 10 -8 The method comprises the steps of carrying out a first treatment on the surface of the The mass content of the asphalt is 6-7.5%, the mass content of the filler is 11-13%, the mass content of the coarse aggregate is 35-55%, and the maximum particle size is 16-19 mm.
The thickness of each elevation of the asphalt concrete core wall upstream supporting layer 3.1 and the asphalt concrete core wall downstream supporting layer 3.3 is not smaller than the thickness of the corresponding elevation of the asphalt concrete core wall seepage-proofing body 3.2;
the asphalt concrete core wall upstream support layer 3.1 and the asphalt concrete core wall downstream support layer 3.3 adopt open graded asphaltGreen concrete with porosity of 10-15%, water stability coefficient not less than 0.85 and permeability coefficient 1 x 10 -2 ～1×10 -4 The method comprises the steps of carrying out a first treatment on the surface of the The mass content of the asphalt is 3.5-5%, the mass content of the filler is 6-8%, the mass content of the coarse aggregate is 60-80%, and the maximum particle size is larger than 19mm but smaller than 40mm.
The length of the asphalt mortar 3.4 is 1.5 m-3.0 m, the starting end of the asphalt mortar is completely butted with the upstream supporting layer 3.1 of the asphalt concrete core wall, the impermeable body 3.2 of the asphalt concrete core wall and the downstream supporting layer 3.3 of the asphalt concrete core wall, and the thickness is the sum of the thicknesses of the three corresponding elevations; the thickness of the terminating end at the contact position with the dam foundation 7 and the bank slopes 8 on two sides is 2-3 times of the thickness of the starting end;
the porosity of asphalt mortar 3.4 is not more than 2%, the water stability coefficient is not less than 0.9, and the permeability coefficient is not more than 1×10 -8 The construction viscosity is not less than 10 3 ～10 4 Pa·s, the degree of separation is not more than 1.05; the mass content of the asphalt is 12-18%, the mass content of the filler is 15-30%, and the mass content of the sand is 55-70%.
The asphalt concrete core wall upstream support layer 3.1, the asphalt concrete core wall seepage-proofing body 3.2, the asphalt concrete core wall downstream support layer 3.3 and the asphalt mortar 3.4 are constructed simultaneously, and asphalt mixture is paved and rolled layer by layer;
the paving thickness of the asphalt mixture is 25 cm-30 cm, the outlet temperature is 160-190 ℃, the warehouse entry temperature is 150-170 ℃, the initial grinding temperature is 140-160 ℃, and the final grinding temperature is not lower than 110 ℃; the surface temperature of the upper layer is 70-100 ℃ during continuous paving.
The dam foundation transition layer 6 is positioned between the upstream dam shell area 1 and the downstream dam shell area 5 and the dam foundation 7 and the two-bank slopes 8, has the thickness of 1.0 m-2.0 m, meets the transition requirement of deformation between the upstream dam shell area 1 and the downstream dam shell area 5 and the dam foundation 7 and the two-bank slopes 8, and has good drainage property, good permeability stability and bearing capacity meeting construction requirements.
The asphalt concrete core wall seepage-proofing body 3.2 is connected with the dam foundation seepage-proofing body 9 and the two-bank slope seepage-proofing bodies 10 through asphalt mortar 3.4;
the dam foundation seepage-proofing body 9 and the two-bank slope seepage-proofing body 10 can be concrete seepage-proofing wall or seepage-proofing curtain and other structures.
The following further describes a large hydropower station engineering adopting the technical scheme of the invention by taking the drawings as an example:
the asphalt concrete core wall dam of a certain hydropower station has the core wall height of 100m, and the asphalt concrete core wall dam of the invention is adopted.
As shown in fig. 1-5, an asphalt concrete core dam comprises an upstream dam shell area 1, an upstream transition layer 2, an asphalt concrete core wall 3, a downstream transition layer 4, a downstream dam shell area 5 and a dam foundation transition layer 6; along the water flow direction, the upstream dam shell area 1, the upstream transition layer 2, the asphalt concrete core wall 3, the downstream transition layer 4 and the downstream dam shell area 5 are sequentially arranged on the surface of the dam foundation 7; wherein the dam foundation transition layer 6 is paved at the position where the surface of the dam foundation 7 is contacted with the upstream dam shell area 1 and the position where the surface of the dam foundation 7 is contacted with the downstream dam shell area 5;
wherein: the asphalt concrete core wall 3 comprises an asphalt concrete core wall body and an asphalt mortar layer 3.4; wherein the asphalt mortar layer 3.4 comprises an integrally formed bottom asphalt mortar layer 3.4.1 and an end asphalt mortar layer 3.4.2; the asphalt concrete core wall main body comprises an asphalt concrete core wall upstream supporting layer 3.1, an asphalt concrete core wall seepage-proofing body 3.2 and an asphalt concrete core wall downstream supporting layer 3.3 which are sequentially arranged along the water flow direction; the bottom of the asphalt concrete core wall main body is integrally formed with the bottom asphalt mortar layer 3.4.1, and the other end of the bottom asphalt mortar layer 3.4.1 is contacted with the upper part of a dam foundation seepage-proofing body 9 of the dam foundation 7; the asphalt mortar layer 3.4.2 at the end is integrally formed at both ends of the asphalt concrete core wall body, and the other end of the asphalt mortar layer 3.4.2 is in contact with the two-shore bank slope seepage-proofing body 10 of the two-shore bank slope 8.
Constructing an asphalt concrete core wall upstream support layer 3.1, an asphalt concrete core wall seepage-proofing body 3.2, an asphalt concrete core wall downstream support layer 3.3 and asphalt mortar 3.4 simultaneously;
the upstream transition layer 2 and the downstream transition layer 4 are synchronously constructed with the asphalt concrete core wall 3 and are filled with the upstream dam shell area 1 and the downstream dam shell area 5 in a flat mode.
The upstream transition layer 2 and the downstream transition layer 4 adopt a single layer along the water flow direction according to the dam characteristics of the upstream dam shell area 1 and the downstream dam shell area 5, meet the transition requirement of deformation between the asphalt concrete core wall 3 and the upstream dam shell area 1 and the downstream dam shell area 5, and have good drainage property, permeability stability and bearing capacity meeting construction requirements.
The thickness of the asphalt concrete core wall seepage-proofing body 3.2 is 1/3 of the thickness of the conventional engineering design, the top width is 20cm, and the bottom width is 50cm; adopts dense graded asphalt concrete, the porosity is not more than 3%, the water stability coefficient is not less than 0.9, and the permeability coefficient is not more than 1 multiplied by 10 -8 The method comprises the steps of carrying out a first treatment on the surface of the The mass content of the asphalt in the proportion is 7%, the mass content of the filler is 12%, the mass content of the coarse aggregate is 45%, and the maximum particle size is 19mm.
The thickness of each elevation of the asphalt concrete core wall upstream supporting layer 3.1 and the asphalt concrete core wall downstream supporting layer 3.3 is equal to the thickness of the corresponding elevation of the asphalt concrete core wall seepage-proofing body 3.2; adopts open graded asphalt concrete, the porosity is 10% -15%, the water stability coefficient is not less than 0.85, and the permeability coefficient is 1 multiplied by 10 -2 ～1×10 -4 The method comprises the steps of carrying out a first treatment on the surface of the The mass content of the asphalt is 4%, the mass content of the filler is 7%, the mass content of the coarse aggregate is 70%, and the maximum particle size is greater than 25mm.
The length of the asphalt mortar 3.4 is 2.5m, the starting end of the asphalt mortar is completely butted with the asphalt concrete core wall upstream supporting layer 3.1, the asphalt concrete core wall seepage-proofing body 3.2 and the asphalt concrete core wall downstream supporting layer 3.3, and the thickness is the sum of the thicknesses of the three corresponding elevations; the thickness of the terminating end at the contact position with the dam foundation 7 and the bank slopes 8 on the two sides is 2 times of that of the starting end;
the porosity of asphalt mortar 3.4 is not more than 2%, the water stability coefficient is not less than 0.9, and the permeability coefficient is not more than 1×10 -8 The construction viscosity is not less than 10 3 ～10 4 Pa·s, the degree of separation is not more than 1.05; the mass content of the asphalt in the mixture ratio is 15%, the mass content of the filler is 25%, and the mass content of the sand is 60%.
The asphalt concrete core wall upstream support layer 3.1, the asphalt concrete core wall seepage-proofing body 3.2, the asphalt concrete core wall downstream support layer 3.3 and the asphalt mortar 3.4 are constructed simultaneously, and asphalt mixture is paved and rolled layer by layer;
the paving thickness of the asphalt mixture is 28cm, the outlet temperature is 160-180 ℃, the warehouse entry temperature is 150-170 ℃, the initial grinding temperature is 140-160 ℃, and the final grinding temperature is not lower than 110 ℃; the surface temperature of the upper layer is 80-100 ℃ during continuous paving.
The dam foundation transition layer 6 is positioned between the upstream dam shell area 1 and the downstream dam shell area 5 and the dam foundation 7 and the two-bank slopes 8, has the thickness of 2.0m, meets the transition requirement of deformation between the upstream dam shell area 1 and the downstream dam shell area 5 and the dam foundation 7 and the two-bank slopes 8, and has good drainage property, good permeability stability and bearing capacity meeting construction requirements.
The asphalt concrete core wall seepage-proofing body 3.2 is connected with the dam foundation seepage-proofing body 9 and the two-bank slope seepage-proofing bodies 10 through asphalt mortar 3.4; the dam foundation seepage-proofing body 9 is a concrete seepage-proofing wall, and the two bank slope seepage-proofing bodies 10 are seepage-proofing curtains.
By adopting the technical scheme disclosed by the invention, the following beneficial effects are obtained:
1) The coarse aggregate with larger grain diameter and larger content, a small amount of filler and a small amount of asphalt are adopted to prepare the open graded asphalt concrete with larger permeability coefficient as the core wall supporting layer, so that the open graded asphalt concrete plays a role in transition with the transition layer while supporting the asphalt concrete core wall seepage-proofing body, the dosage of the close graded asphalt concrete is greatly reduced, and the engineering investment is saved;
2) The asphalt mortar layer with the trapezoid structure is directly connected with the dam foundation and the bank slopes on two sides, and is constructed with the asphalt concrete core wall seepage-proofing body and the asphalt concrete core wall supporting layer simultaneously, so that the dam body seepage-proofing structure and the construction procedure are greatly simplified, the seepage-proofing quality of the core wall dam is ensured, the construction period is shortened, and the asphalt concrete core wall dam has wide guiding and popularization significance.
The foregoing is merely a preferred embodiment of the present invention and it should be noted that modifications and adaptations to those skilled in the art may be made without departing from the principles of the present invention, which is also intended to be covered by the present invention.
Claims (10)
1. The asphalt concrete core wall dam is characterized by comprising an upstream dam shell area (1), an upstream transition layer (2), an asphalt concrete core wall (3), a downstream transition layer (4), a downstream dam shell area (5) and a dam foundation transition layer (6);
along the water flow direction, the upstream dam shell area (1), the upstream transition layer (2), the asphalt concrete core wall (3), the downstream transition layer (4) and the downstream dam shell area (5) are sequentially arranged on the surface of the dam foundation (7); wherein the dam foundation transition layer (6) is paved at the position where the surface of the dam foundation (7) is contacted with the upstream dam shell area (1) and at the position where the surface of the dam foundation (7) is contacted with the downstream dam shell area (5);
wherein: the asphalt concrete core wall (3) comprises an asphalt concrete core wall main body and an asphalt mortar layer (3.4); wherein the asphalt mortar layer (3.4) comprises an integrally formed bottom asphalt mortar layer (3.4.1) and an end asphalt mortar layer (3.4.2); the asphalt concrete core wall main body comprises an asphalt concrete core wall upstream supporting layer (3.1), an asphalt concrete core wall impermeable body (3.2) and an asphalt concrete core wall downstream supporting layer (3.3) which are sequentially arranged along the water flow direction; the bottom of the asphalt concrete core wall main body is integrally formed with the bottom asphalt mortar layer (3.4.1), and the other end of the bottom asphalt mortar layer (3.4.1) is contacted with the upper part of a dam foundation seepage-proofing body (9) of the dam foundation (7); the asphalt concrete core wall body is characterized in that the two ends of the asphalt concrete core wall body are respectively integrally formed with the end asphalt mortar layer (3.4.2), and the other end of the end asphalt mortar layer (3.4.2) is in contact with two bank slope seepage-proofing bodies (10) of two bank slopes (8).
2. An asphalt concrete core dam according to claim 1, wherein the upstream transition layer (2) and the downstream transition layer (4) adopt a single-layer or multi-layer structure along the water flow direction according to the dam characteristics of the upstream dam shell area (1) and the downstream dam shell area (5), meet the deformation transition requirement between the asphalt concrete core wall (3) and the upstream dam shell area (1), and meet the deformation transition requirement between the asphalt concrete core wall (3) and the downstream dam shell area (5), and have drainage property, permeability stability and bearing capacity meeting construction requirements.
3. The asphalt concrete core dam according to claim 1, wherein the thickness of each elevation of the asphalt concrete core impervious body (3.2) can be thinned, but the top width is not less than 20cm;
the asphalt concrete core wall seepage-proofing body (3.2) adopts dense graded asphalt concrete, the porosity is not more than 3%, the water stability coefficient is not less than 0.9, and the permeability coefficient is not more than 1 multiplied by 10 -8 The method comprises the steps of carrying out a first treatment on the surface of the The mass content of the asphalt is 6-7.5%, the mass content of the filler is 11-13%, the mass content of the coarse aggregate is 35-55%, and the maximum particle size is 16-19 mm.
4. An asphalt concrete core dam according to claim 1, wherein each elevation thickness of said asphalt concrete core upstream support layer (3.1) and said asphalt concrete core downstream support layer (3.3) is not less than the thickness of the corresponding elevation of said asphalt concrete core impermeable body (3.2);
the asphalt concrete core wall upstream support layer (3.1) and the asphalt concrete core wall downstream support layer (3.3) adopt open graded asphalt concrete, the porosity is 10% -15%, the water stability coefficient is not less than 0.85, and the permeability coefficient is 1 multiplied by 10 -2 ～1×10 -4 The method comprises the steps of carrying out a first treatment on the surface of the The mass content of the asphalt is 3.5-5%, the mass content of the filler is 6-8%, the mass content of the coarse aggregate is 60-80%, and the maximum particle size is larger than 19mm but smaller than 40mm.
5. An asphalt concrete core dam according to claim 1, wherein said asphalt mortar layer (3.4) has a length of 1.5m to 3.0m;
the bottom asphalt mortar layer (3.4.1) is of a trapezoid structure, the top initial end face of the bottom asphalt mortar layer is completely butted with the bottom face of the asphalt concrete core wall main body, and the side length of the top initial end face of the bottom asphalt mortar layer is the thickness of the asphalt concrete core wall main body at the corresponding elevation; the bottom end face of the dam foundation seepage-proofing body (9) is contacted with the side length of the dam foundation seepage-proofing body is 2-3 times of the side length of the top initial end face;
the end asphalt mortar layer (3.4.2) is of a trapezoid structure, the top initial end face of the end asphalt mortar layer is completely butted with the side end face of the asphalt concrete core wall main body, and the side length of the top initial end face of the end asphalt mortar layer is the thickness of the corresponding elevation of the asphalt concrete core wall main body; the bottom end surface of the anti-seepage body is contacted with the anti-seepage body (10) of the bank slope of the two banks, and the side length of the anti-seepage body is 2-3 times of the side length of the top initial end surface.
6. An asphalt concrete core dam according to claim 1, wherein said asphalt mortar layer (3.4) has a porosity of not more than 2%, a water stability factor of not less than 0.9, and a permeability factor of not more than 1 x 10 -8 The construction viscosity is not less than 10 3 ～10 4 Pa·s, the degree of separation is not more than 1.05; the mass content of the asphalt is 12-18%, the mass content of the filler is 15-30%, and the mass content of the sand is 55-70%.
7. An asphalt concrete core dam according to claim 1, wherein the thickness of the dam foundation transition layer (6) is 1.0 m-2.0 m, which meets the deformation transition requirement between the upstream dam shell area (1) and the dam foundation (7), and the deformation transition requirement between the downstream dam shell area (5) and the dam foundation (7), and has drainage, penetration stability and bearing capacity meeting construction requirements.
8. An asphalt concrete core dam according to claim 1, wherein said dam foundation barrier (9) and said two-shore bank slope barrier (10) are concrete barriers or barrier curtain structures.
9. An asphalt concrete core dam according to claim 1, wherein said asphalt concrete core upstream support layer (3.1), said asphalt concrete core impervious body (3.2), said asphalt concrete core downstream support layer (3.3) and said asphalt mortar layer (3.4) are constructed simultaneously, asphalt mixture is spread and rolled layer by layer;
the paving thickness of the asphalt mixture is 25 cm-30 cm, the outlet temperature is 160-190 ℃, the warehouse entry temperature is 150-170 ℃, the initial grinding temperature is 140-160 ℃, and the final grinding temperature is not lower than 110 ℃; the surface temperature of the upper layer is 70-100 ℃ during continuous paving.
10. An asphalt concrete core dam according to claim 1, wherein said upstream transition layer (2), said downstream transition layer (4) are constructed in synchronism with said asphalt concrete core wall (3) and filled with said upstream and downstream shell sections (1, 5).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311261902.6A CN117286842B (en) | 2023-09-27 | 2023-09-27 | Asphalt concrete core wall dam |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311261902.6A CN117286842B (en) | 2023-09-27 | 2023-09-27 | Asphalt concrete core wall dam |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN117286842A true CN117286842A (en) | 2023-12-26 |
| CN117286842B CN117286842B (en) | 2024-05-07 |
Family
ID=89251417
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311261902.6A Active CN117286842B (en) | 2023-09-27 | 2023-09-27 | Asphalt concrete core wall dam |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117286842B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107237301A (en) * | 2017-07-18 | 2017-10-10 | 中国水电基础局有限公司 | The construction method of high altitude localities sand-gravel dam continuous laying |
| CN107419706A (en) * | 2017-07-18 | 2017-12-01 | 中国水电基础局有限公司 | The mesoclimate of high altitude localities asphaltic concrete core wall construction builds method |
| RU2668529C1 (en) * | 2017-12-28 | 2018-10-01 | Открытое Акционерное Общество "Российские Железные Дороги" | High speed main road |
| CN217710582U (en) * | 2022-06-17 | 2022-11-01 | 新疆农业大学 | Rolling and pouring combined asphalt concrete straight core wall dam |
-
2023
- 2023-09-27 CN CN202311261902.6A patent/CN117286842B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107237301A (en) * | 2017-07-18 | 2017-10-10 | 中国水电基础局有限公司 | The construction method of high altitude localities sand-gravel dam continuous laying |
| CN107419706A (en) * | 2017-07-18 | 2017-12-01 | 中国水电基础局有限公司 | The mesoclimate of high altitude localities asphaltic concrete core wall construction builds method |
| RU2668529C1 (en) * | 2017-12-28 | 2018-10-01 | Открытое Акционерное Общество "Российские Железные Дороги" | High speed main road |
| CN217710582U (en) * | 2022-06-17 | 2022-11-01 | 新疆农业大学 | Rolling and pouring combined asphalt concrete straight core wall dam |
Also Published As
| Publication number | Publication date |
|---|---|
| CN117286842B (en) | 2024-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103352400B (en) | Prefabricated embedded tracks plate | |
| CN108103871B (en) | Construction method of roadbed foam concrete filling technology adjacent to existing subway facility | |
| CN113737747B (en) | Reservoir earth and rockfill dam upper reaches bank protection structure of breaking wave | |
| CN117286842B (en) | Asphalt concrete core wall dam | |
| CN107663911A (en) | A kind of assembled overlaps cavity floor | |
| CN201502019U (en) | Permeable ground structure | |
| CN218969919U (en) | Asphalt concrete face rockfill dam arrangement structure | |
| CN219793844U (en) | Permeable ecological recycling material control guide dam structure | |
| CN208329409U (en) | A kind of parapet of roofing water leak-proof structure | |
| CN205474894U (en) | French drain drainage structures | |
| CN207032022U (en) | Bridge central partition | |
| CN104818670A (en) | Waterproof structure of high speed railway ballastless concrete bridge continuous concrete carriageway plate system | |
| CN212294202U (en) | Expansive soil field terrace embankment filling structure | |
| CN213925697U (en) | Transverse water passing roadbed structure | |
| CN114481970A (en) | Asphalt concrete core wall structure of pumped storage power station dam in heavy rainfall area | |
| CN210562300U (en) | Waterproof structure at joint of station main body and auxiliary channel | |
| CN103526890B (en) | Silica nanometer insulation quilt roof heat insulation structure and construction technology thereof | |
| CN111663390A (en) | Expansive soil terrace embankment filling structure and construction method | |
| CN219825384U (en) | Waterproof construction structure of basement outer wall | |
| CN217399303U (en) | Kiln brick pitted surface green stone plate pavement system | |
| CN108643477A (en) | A kind of parapet of roofing water leak-proof structure and its construction method | |
| CN211597117U (en) | Roof deformation joint waterproof construction | |
| CN217557529U (en) | Toilet caisson waterproof construction | |
| CN220013257U (en) | Road pavement structure | |
| CN210917060U (en) | Box culvert combined with retaining wall |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |