Z-shaped asphalt concrete reservoir bottom structure of reservoir and construction method of Z-shaped asphalt concrete reservoir bottom structure
By designing the Z-type asphalt concrete reservoir bottom structure of the reservoir, adding structural grid slope protection layer and standardizing the layered and segmented construction of asphalt concrete at the uphill angle, the problems of cracking at the bottom of the reservoir, the problems of increased construction period and investment were solved, and efficient and stable bottom of the reservoir construction was achieved.
Patent Information
- Application Number
- CN202411865819.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-18
- Publication Date
- 2025-02-28
AI Technical Summary
In pumping and storage projects, there is no large deformation structure such as the excavation and filling boundary line and uphill angle at the bottom of the reservoir, which causes the reservoir to bear the head load for a long time, increasing the risk of cracking. The existing construction methods require a significant increase in the excavation and filling project volume, resulting in an increase in construction period and an increase in engineering investment.
Design a reservoir Z-type asphalt concrete reservoir bottom structure. By adding structural mesh slope protection layer at the uphill corner of the slope, standardizing the layered and segmented construction of asphalt concrete at the uphill corner, and setting up Z-type anti-seepage bodies to avoid continuous cold joints and unsolid crushing, thereby improving the deformation adaptability and anti-seepage performance of asphalt concrete at the bottom of the reservoir.
This technical means improves the deformation adaptability of asphalt concrete at the bottom of the reservoir, reduces the risk of cracking, ensures construction quality and anti-seepage performance, and at the same time reduces the excavation and filling project volume, shortens the construction period, and reduces project investment.
Smart Images
Figure CN119531298A_ABST
Abstract
Description
Technical Field
[0001] The invention belongs to the technical field of reservoir bottom construction, and specifically relates to a reservoir Z-shaped asphalt concrete bottom structure and a construction method thereof. Background Art
[0002] In the process of pumped storage project construction, in order to reduce the total engineering volume, the upper and lower reservoir basins are mostly built on river channels, valleys and other foundations by expanding the mountain and filling the bottom. Therefore, most pumped storage reservoir basins have half-filled and half-excavated large deformation foundation terrain characteristics; because the excavation and filling volume cannot be completely balanced during construction, different working surfaces with a certain height difference are easily formed at the bottom of the pumped storage project reservoir basin. If the bottom of the pumped storage reservoir basin is maintained as different working surfaces with a certain height difference, the reservoir bottom will be subjected to head loads for a long time due to the large deformation structures such as the excavation and filling boundary line and the lack of stable bedrock at the uphill angle, resulting in an increased risk of cracking at the reservoir bottom, and the asphalt concrete construction quality and anti-seepage performance cannot be guaranteed. At present, the bottom of the pumped storage reservoir basin is mostly maintained as a plane at the same height, so the excavation and filling volume needs to be greatly increased, which leads to an increase in construction period and an increase in project investment. Nowadays, there is a lack of a fast construction method for Z-shaped reservoir bottom structures with different working surfaces with a certain height difference. Summary of the invention
[0003] The technical problem to be solved by the present invention is to provide a Z-shaped asphalt concrete reservoir bottom structure for a reservoir in view of the deficiencies in the above-mentioned prior art. The structure of the structure is novel and reasonable. A structural grid slope protection layer is added at the uphill angle of the slope to avoid waves or lumps of the asphalt concrete during the rolling process. The layered and segmented construction of the uphill angle asphalt concrete is standardized to avoid continuous cold joints and loose rolling at the uphill angle, thereby improving the deformation adaptability of the asphalt concrete at the bottom of the reservoir, reducing the risk of cracking at the bottom of the reservoir, ensuring the construction quality and anti-seepage performance of the asphalt concrete, and at the same time reducing a large amount of excavation and filling, thereby improving the construction period and facilitating promotion and use.
[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a Z-shaped asphalt concrete reservoir bottom structure of a reservoir, characterized in that it includes a low reservoir bottom surface, a high reservoir bottom surface, and a Z-shaped anti-seepage body for connecting the low reservoir bottom surface and the high reservoir bottom surface, wherein the Z-shaped anti-seepage body includes a lower reverse arc surface, a slope surface, and an upper slope angle arc surface arranged in sequence from bottom to top;
[0005] The bottom surface of the low reservoir, the bottom surface of the high reservoir and the slope surface all include a transition layer, a crushed stone drainage cushion layer, a first asphalt concrete leveling bonding layer, a first asphalt concrete anti-seepage layer and a first asphalt mastic sealing layer which are arranged on the filling body from bottom to top in sequence;
[0006] The lower cambered surface includes a transition layer, a crushed stone drainage cushion layer, a second asphalt concrete leveling bonding layer, a lower asphalt concrete thickening layer, a lower reinforcement mesh, a second asphalt concrete anti-seepage layer and a second asphalt mastic sealing layer, which are arranged on the filling body from bottom to top in sequence;
[0007] The upslope angle arc surface includes a transition layer, a crushed stone drainage cushion layer, a structural grid slope protection layer, a third asphalt concrete leveling bonding layer, an upper asphalt concrete thickening layer, an upper reinforcement mesh, a third asphalt concrete anti-seepage layer and a third asphalt mastic sealing layer, which are arranged on the filling body from bottom to top.
[0008] The above-mentioned Z-shaped asphalt concrete reservoir bottom structure is characterized in that: the low reservoir bottom surface includes a plurality of strip low reservoir bottom surfaces connected in sequence, the high reservoir bottom surface includes a plurality of strip high reservoir bottom surfaces connected in sequence, the Z-shaped anti-seepage body includes a plurality of Z-shaped strip anti-seepage bodies connected in sequence, the upslope angle area of the Z-shaped strip anti-seepage body has a seam, the cold and hot joints on two adjacent Z-shaped strip anti-seepage bodies are discontinuous, and the seam is a cold seam or a hot seam.
[0009] The above-mentioned Z-shaped asphalt concrete reservoir bottom structure is characterized in that the height difference between the low reservoir bottom surface and the high reservoir bottom surface is 5m to 40m, and the slope ratio of the slope surface is 1:1.7 to 1:2.5.
[0010] The above-mentioned Z-type asphalt concrete reservoir bottom structure is characterized in that: the thickness of the transition layer is 200 cm; the thickness of the crushed stone drainage cushion layer at the low reservoir bottom, high reservoir bottom, lower anti-arc surface and slope surface is 90 cm, and the thickness of the crushed stone drainage cushion layer at the upslope angle arc surface is 60 cm to 70 cm; the first asphalt concrete leveling bonding layer, the second asphalt concrete leveling bonding layer and the third asphalt concrete leveling bonding layer are connected in sequence and their thicknesses are 10 cm; the first asphalt concrete anti-seepage layer, the second asphalt concrete anti-seepage layer and the third asphalt concrete anti-seepage layer are connected in sequence and their thicknesses are 10 cm; the first asphalt mastic sealing layer, the second asphalt mastic sealing layer and the third asphalt mastic sealing layer are connected in sequence and their thicknesses are 2 mm.
[0011] The above-mentioned Z-shaped asphalt concrete reservoir bottom structure is characterized in that the thickness of the structural grid slope protection layer is 20cm to 30cm, and the structural grid slope protection layer includes a concrete structural grid slope protection layer, a steel wire structural grid slope protection layer and a polyester structural grid slope protection layer.
[0012] The above-mentioned Z-shaped asphalt concrete bottom structure of a reservoir is characterized in that: the thickness of the upper asphalt concrete thickening layer and the lower asphalt concrete thickening layer are both 5 cm; the upper reinforced mesh and the lower reinforced mesh are both steel reinforced mesh or polyester reinforced mesh, the upper reinforced mesh extends up and down to 1 m outside the upslope angle arc surface area, and the lower reinforced mesh extends up and down to 1 m outside the lower reverse arc surface area.
[0013] The above-mentioned Z-shaped asphalt concrete reservoir bottom structure is characterized in that: the cut-fill boundary area can pass through the Z-shaped impermeable body once or multiple times, and an asphalt concrete wedge-shaped body or a trapezoidal body is arranged at the position where the cut-fill boundary area passes through the Z-shaped impermeable body;
[0014] When the cut-fill boundary area passes through the lower anti-camber surface, an asphalt concrete wedge or trapezoidal body is set between the lower reinforcement mesh and the lower asphalt concrete thickening layer;
[0015] When the cut-fill boundary area passes through the slope surface, an asphalt concrete wedge or trapezoidal body is arranged between the first asphalt concrete anti-seepage layer and the first asphalt concrete leveling bonding layer on the slope surface;
[0016] When the cut-fill boundary area passes through the upslope angle arc surface, an asphalt concrete wedge or trapezoidal body is set between the upper reinforcement mesh and the upper asphalt concrete thickening layer;
[0017] The asphalt concrete wedge-shaped body or trapezoidal body is a fine-grained asphalt concrete wedge-shaped body or trapezoidal body.
[0018] At the same time, the present invention also discloses a reservoir Z-type asphalt concrete reservoir bottom construction method, which is characterized in that the construction method comprises the following steps:
[0019] Step 1: Divide the reservoir bottom into sections and level the site: According to the reservoir bottom structure with different working surfaces with a certain height difference on site, use the cut-and-fill method to divide the Z-shaped asphalt concrete reservoir bottom, and level the low reservoir bottom area and the high reservoir bottom area to be constructed. The cut-and-fill boundary area can pass through the Z-shaped anti-seepage area to be constructed once or multiple times;
[0020] Step 2: Determine the slope ratio of the Z-type anti-seepage body slope: Determine the slope ratio of the Z-type anti-seepage body slope according to the height difference between the low reservoir bottom area and the high reservoir bottom area. If the height difference is less than or equal to 20m, the slope ratio is 1:1.7 to 1:2.0; if the height difference is greater than 20m, the slope ratio is 1:2.0 to 1:2.5;
[0021] Step 3: Construction of reservoir bottom zoning: First, construct the low reservoir bottom area and the high reservoir bottom area respectively;
[0022] Step 4: Build a temporary transportation road: On the slope of the asphalt concrete anti-seepage layer, lay geotextile, thermal insulation cotton, 50cm thick fine aggregate and coarse aggregate with a thickness of 50cm or more from bottom to top, respectively, to ensure that the material transport vehicle does not damage the anti-seepage layer when going up and down. The laying width and slope ensure the safety of the material transport vehicle, and the road slope ratio shall not be less than the slope ratio of the anti-seepage structure plus 0.5. The material transport vehicle can be tested in the test area outside the paving site to determine the ratio;
[0023] Step 5: constructing a Z-shaped anti-seepage body from bottom to top using a construction equipment group: the Z-shaped anti-seepage body includes a plurality of Z-shaped strip anti-seepage bodies connected in sequence, the upslope angle area of the Z-shaped strip anti-seepage body has a cold seam, and the cold seams on two adjacent Z-shaped strip anti-seepage bodies are discontinuous;
[0024] Step 6: Dismantle the temporary transportation road: After all asphalt concrete construction work on the Z-shaped asphalt concrete bottom of the reservoir is completed, including the construction of the sealing layer, and all construction equipment groups are withdrawn, the temporary transportation road is dismantled.
[0025] The above-mentioned construction method of the Z-shaped asphalt concrete reservoir bottom of the reservoir is characterized in that: in step 5, an asphalt concrete wedge-shaped body or a trapezoidal body is arranged at the position where the excavation and filling boundary area passes through the Z-shaped anti-seepage body;
[0026] When the cut-fill boundary area passes through the lower anti-camber surface, an asphalt concrete wedge or trapezoidal body is set between the lower reinforcement mesh and the lower asphalt concrete thickening layer;
[0027] When the cut-fill boundary area passes through the slope surface, an asphalt concrete wedge or trapezoidal body is arranged between the first asphalt concrete anti-seepage layer and the first asphalt concrete leveling bonding layer on the slope surface;
[0028] When the cut-fill boundary area passes through the upslope angle arc surface, an asphalt concrete wedge or trapezoidal body is set between the upper reinforcement mesh and the upper asphalt concrete thickening layer;
[0029] The asphalt concrete wedge-shaped body or trapezoidal body is a fine-grained asphalt concrete wedge-shaped body or trapezoidal body.
[0030] The above-mentioned construction method of the Z-type asphalt concrete reservoir bottom of the reservoir is characterized in that: in step five, the construction equipment group includes a main gallows car, an auxiliary gallows car, a winch, a traction rope, a paving equipment, a rolling equipment, a dump truck and a water pump.
[0031] Compared with the prior art, the present invention has the following advantages:
[0032] 1. The present invention sets a Z-shaped asphalt concrete reservoir bottom and sets an anti-seepage slope structure with different heights and slopes at the reservoir bottom of the reservoir basin, thereby reducing excavation and filling, improving the construction period, and saving the total project investment.
[0033] 2. In the present invention, a lower asphalt concrete thickening layer and a lower reinforced mesh are added to the lower reverse arc surface to improve the deformation adaptability and achieve the purpose of adapting to uneven settlement. A structural grid slope protection layer, an upper asphalt concrete thickening layer and an upper reinforced mesh are added to the upslope angle arc surface. The structural grid slope protection layer is added at the upslope angle of the slope to avoid waves or bulges of asphalt concrete during the rolling process, thereby improving the deformation adaptability of the asphalt concrete at the bottom of the reservoir, reducing the risk of cracking at the bottom of the reservoir, and ensuring the construction quality and anti-seepage performance of the asphalt concrete; in addition, the excavation and filling boundary area can pass through the Z-shaped anti-seepage body once or multiple times. In order to adapt to the large deformation requirements of the excavation and filling division area, an asphalt concrete wedge body or trapezoidal body is added. In order to ensure constructability, the wedge body or trapezoidal body is formed by fine-grained asphalt concrete.
[0034] 3. The construction method adopted by the present invention has simple steps, standardizes the layered and segmented construction of uphill angle asphalt concrete to avoid continuous cold joints and loose rolling at the uphill angle, standardizes the layout and demolition principles of temporary roads for the construction of anti-seepage slope structures of different heights and slopes, protects the anti-seepage performance of the anti-seepage body, and is easy to promote and use.
[0035] To sum up, the design of the present invention is novel and reasonable. A structural grid slope protection layer is added at the uphill corner of the slope to avoid waves or bulges in the asphalt concrete during the rolling process. The layered and segmented construction of the asphalt concrete at the uphill corner is standardized to avoid continuous cold joints and loose rolling at the uphill corner, thereby improving the deformation adaptability of the asphalt concrete at the bottom of the reservoir, reducing the risk of cracking at the bottom of the reservoir, ensuring the construction quality and anti-seepage performance of the asphalt concrete, and at the same time reducing a large amount of excavation and filling, thereby improving the construction period and facilitating popularization and use.
[0036] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS
[0037] Figure 1 It is a schematic diagram of the overall effect of the Z-type asphalt concrete reservoir bottom of the reservoir of the present invention.
[0038] Figure 2 It is a schematic diagram of the local details of the Z-type asphalt concrete reservoir bottom of the reservoir of the present invention.
[0039] Figure 3 This is a diagram showing the layout effect of the cold seam on each Z-shaped strip anti-seepage body of the present invention.
[0040] Figure 4 It is a flowchart of the construction method of the present invention.
[0041] Description of reference numerals:
[0042] 1—lower reservoir bottom surface; 2—lower arc surface; 3—slope surface;
[0043] 4—uphill angle arc surface; 5—high reservoir bottom surface; 6—fill body;
[0044] 7—transition layer; 8—gravel drainage cushion layer;
[0045] 9—the first asphalt concrete leveling bonding layer; 10—the first asphalt concrete anti-seepage layer;
[0046] 11—first mastic asphalt sealing layer; 12—joint;
[0047] 21—Second asphalt concrete leveling bonding layer; 22—Lower asphalt concrete thickening layer;
[0048] 23—lower reinforcement mesh; 24—second asphalt concrete anti-seepage layer;
[0049] 25—second mastic asphalt sealing layer; 41—structural grid slope protection layer;
[0050] 42—third asphalt concrete leveling bonding layer; 43—upper asphalt concrete thickening layer;
[0051] 44—upper reinforcement mesh; 45—third asphalt concrete anti-seepage layer;
[0052] 46—Third asphalt mastic sealing layer. DETAILED DESCRIPTION
[0053] like Figures 1 to 3 As shown, a Z-shaped asphalt concrete reservoir bottom structure of a reservoir described in the present invention comprises a low reservoir bottom surface 1, a high reservoir bottom surface 5, and a Z-shaped anti-seepage body for connecting the low reservoir bottom surface 1 and the high reservoir bottom surface 5, wherein the Z-shaped anti-seepage body comprises a lower reverse arc surface 2, a slope surface 3, and an upper slope angle arc surface 4 arranged in sequence from bottom to top;
[0054] The lower reservoir bottom surface 1, the upper reservoir bottom surface 5 and the slope surface 3 all include a transition layer 7, a crushed stone drainage cushion layer 8, a first asphalt concrete leveling bonding layer 9, a first asphalt concrete anti-seepage layer 10 and a first asphalt mastic sealing layer 11 which are arranged on the filling body 6 in order from bottom to top;
[0055] The lower cambered surface 2 includes a transition layer 7, a crushed stone drainage cushion layer 8, a second asphalt concrete leveling bonding layer 21, a lower asphalt concrete thickening layer 22, a lower reinforcement mesh 23, a second asphalt concrete anti-seepage layer 24 and a second asphalt mastic sealing layer 25, which are arranged on the filling body 6 in order from bottom to top;
[0056] The upslope angle arc surface 4 includes a transition layer 7, a crushed stone drainage cushion layer 8, a structural grid slope protection layer 41, a third asphalt concrete leveling bonding layer 42, an upper asphalt concrete thickening layer 43, an upper reinforcement mesh 44, a third asphalt concrete anti-seepage layer 45 and a third asphalt mastic sealing layer 46, which are arranged on the filling body 6 from bottom to top.
[0057] It should be noted that by setting up a Z-shaped asphalt concrete reservoir bottom and setting up anti-seepage slope structures of different heights and slopes at the bottom of the reservoir basin, excavation and filling are reduced and the construction period is improved; a lower asphalt concrete thickening layer and a lower reinforced mesh are added to the lower anti-arc surface to improve the deformation adaptability and achieve the purpose of adapting to uneven subsidence; a structural grid slope protection layer, an upper asphalt concrete thickening layer and an upper reinforced mesh are added to the upslope angle arc surface; a structural grid slope protection layer is added at the upslope angle of the slope surface to avoid waves or bulges of asphalt concrete during the rolling process, thereby improving the deformation adaptability of the asphalt concrete at the reservoir bottom, reducing the risk of cracking at the reservoir bottom, and ensuring the construction quality and anti-seepage performance of asphalt concrete; in addition, the excavation and filling boundary area can pass through the Z-shaped anti-seepage body once or multiple times. In order to adapt to the large deformation requirements of the excavation and filling division area, an asphalt concrete wedge or trapezoidal body is added. In order to ensure constructability, the wedge or trapezoidal body is formed by fine-grained asphalt concrete.
[0058] In this embodiment, the low reservoir bottom surface 1 includes multiple strip low reservoir bottom surfaces connected in sequence, the high reservoir bottom surface 5 includes multiple strip high reservoir bottom surfaces connected in sequence, the Z-type anti-seepage body includes multiple Z-type strip anti-seepage bodies connected in sequence, the upslope angle area of the Z-type strip anti-seepage body has a seam 12, the seams 12 on two adjacent Z-type strip anti-seepage bodies are discontinuous, and the seam 12 is a cold seam or a hot seam.
[0059] In this embodiment, the height difference between the lower reservoir bottom surface 1 and the higher reservoir bottom surface 5 is 5m to 40m, and the slope ratio of the slope surface 3 is 1:1.7 to 1:2.5.
[0060] In this embodiment, the thickness of the transition layer 7 is 200 cm; the thickness of the gravel drainage cushion layer 8 at the low reservoir bottom surface 1, the high reservoir bottom surface 5, the lower anti-arc surface 2 and the slope surface 3 is 90 cm, and the thickness of the gravel drainage cushion layer 8 at the upslope angle arc surface 4 is 60 cm to 70 cm; the first asphalt concrete leveling bonding layer 9, the second asphalt concrete leveling bonding layer 21 and the third asphalt concrete leveling bonding layer 41 are connected in sequence and their thicknesses are 10 cm; the first asphalt concrete anti-seepage layer 10, the second asphalt concrete anti-seepage layer 24 and the third asphalt concrete anti-seepage layer 45 are connected in sequence and their thicknesses are 10 cm; the first asphalt mastic sealing layer 11, the second asphalt mastic sealing layer 25 and the third asphalt mastic sealing layer 46 are connected in sequence and their thicknesses are 2 mm.
[0061] In this embodiment, the thickness of the structural grid slope protection layer 41 is 20 cm to 30 cm, and the structural grid slope protection layer 41 includes a concrete structural grid slope protection layer, a steel wire structural grid slope protection layer and a polyester structural grid slope protection layer.
[0062] In this embodiment, the thickness of the upper asphalt concrete thickening layer 43 and the lower asphalt concrete thickening layer 22 are both 5 cm; the upper reinforcing mesh 44 and the lower reinforcing mesh 23 are both steel reinforcing meshes or polyester reinforcing meshes, the upper reinforcing mesh 44 extends up and down to 1 m outside the upslope angle arc surface 4 area, and the lower reinforcing mesh 23 extends up and down to 1 m outside the lower reverse arc surface 2 area.
[0063] In this embodiment, the cut-and-fill boundary area may pass through the Z-shaped impermeable body once or multiple times, and an asphalt concrete wedge-shaped body or a trapezoidal body is arranged at the position where the cut-and-fill boundary area passes through the Z-shaped impermeable body;
[0064] When the cut-fill boundary area passes through the lower anti-cambered surface 2, an asphalt concrete wedge or trapezoidal body is arranged between the lower reinforcement mesh 23 and the lower asphalt concrete thickening layer 22;
[0065] When the cut-fill boundary area passes through the slope surface 3, an asphalt concrete wedge or trapezoidal body is arranged between the first asphalt concrete anti-seepage layer 10 and the first asphalt concrete leveling bonding layer 9 on the slope surface 3;
[0066] When the cut-fill boundary area passes through the upslope angle arc surface 4, an asphalt concrete wedge or trapezoidal body is provided between the upper reinforcement mesh 44 and the upper asphalt concrete thickening layer 43;
[0067] The asphalt concrete wedge-shaped body or trapezoidal body is a fine-grained asphalt concrete wedge-shaped body or trapezoidal body.
[0068] like Figure 4 A reservoir Z-shaped asphalt concrete bottom construction method shown includes the following steps:
[0069] Step 1: Divide the reservoir bottom into sections and level the site: According to the reservoir bottom structure with different working surfaces with a certain height difference on site, use the cut-and-fill method to divide the Z-shaped asphalt concrete reservoir bottom, and level the low reservoir bottom area and the high reservoir bottom area to be constructed. The cut-and-fill boundary area can pass through the Z-shaped anti-seepage area to be constructed once or multiple times;
[0070] Step 2: Determine the slope ratio of the Z-type anti-seepage body slope: Determine the slope ratio of the Z-type anti-seepage body slope according to the height difference between the low reservoir bottom area and the high reservoir bottom area. If the height difference is less than or equal to 20m, the slope ratio is 1:1.7 to 1:2.0; if the height difference is greater than 20m, the slope ratio is 1:2.0 to 1:2.5;
[0071] Step 3: Construction of reservoir bottom zoning: First, construct the low reservoir bottom surface 1 and the high reservoir bottom surface 5 in the low reservoir bottom surface area and the high reservoir bottom surface area respectively;
[0072] Step 4: Build a temporary transportation road: On the slope of the asphalt concrete anti-seepage layer, lay geotextile, thermal insulation cotton, 50cm thick fine aggregate and coarse aggregate with a thickness of 50cm or more from bottom to top, respectively, to ensure that the material transport vehicle does not damage the anti-seepage layer when going up and down. The laying width and slope ensure the safety of the material transport vehicle, and the road slope ratio shall not be less than the slope ratio of the anti-seepage structure plus 0.5. The material transport vehicle can be tested in the test area outside the paving site to determine the ratio;
[0073] Step 5: constructing a Z-shaped anti-seepage body from bottom to top using a construction equipment group: the Z-shaped anti-seepage body includes a plurality of Z-shaped strip anti-seepage bodies connected in sequence, the upslope angle area of the Z-shaped strip anti-seepage body has a joint 12, and the joints 12 on two adjacent Z-shaped strip anti-seepage bodies are discontinuous;
[0074] Step 6: Dismantle the temporary transportation road: After all asphalt concrete construction work on the Z-shaped asphalt concrete bottom of the reservoir is completed, including the construction of the sealing layer, and all construction equipment groups are withdrawn, the temporary transportation road is dismantled.
[0075] It should be noted that with regard to the treatment of cold joints, the layered and segmented construction of uphill corner asphalt concrete is standardized to avoid continuous cold joints and loose compaction at the uphill corners. The layout and demolition principles of temporary roads for the construction of anti-seepage slope structures of different heights and slopes are standardized to protect the anti-seepage performance of the anti-seepage body.
[0076] In this embodiment, in step 5, an asphalt concrete wedge-shaped body or a trapezoidal body is set at the position where the cut-fill boundary area passes through the Z-shaped impermeable body;
[0077] When the cut-fill boundary area passes through the lower anti-cambered surface 2, an asphalt concrete wedge or trapezoidal body is arranged between the lower reinforcement mesh 23 and the lower asphalt concrete thickening layer 22;
[0078] When the cut-fill boundary area passes through the slope surface 3, an asphalt concrete wedge or trapezoidal body is arranged between the first asphalt concrete anti-seepage layer 10 and the first asphalt concrete leveling bonding layer 9 on the slope surface 3;
[0079] When the cut-fill boundary area passes through the upslope angle arc surface 4, an asphalt concrete wedge or trapezoidal body is provided between the upper reinforcement mesh 44 and the upper asphalt concrete thickening layer 43;
[0080] The asphalt concrete wedge-shaped body or trapezoidal body is a fine-grained asphalt concrete wedge-shaped body or trapezoidal body.
[0081] In this embodiment, in step five, the construction equipment group includes a main gallows vehicle, an auxiliary gallows vehicle, a winch, a traction rope, a paving device, a rolling device, a dump truck and a water pump.
[0082] When the present invention is used, unlike the common full-basin asphalt concrete, the upslope angle of the reservoir is basically above the water level during operation. The upslope angle of the reservoir bottom asphalt concrete is located at the bottom of the reservoir all year round and bears the maximum water level pressure. The construction equipment group uses the main gallows car, the auxiliary gallows car, the winch, the traction rope, the paving equipment, the rolling equipment, the dump truck and the water pump to cooperate with each other to carry out the asphalt concrete construction. To ensure the feasibility of construction, the winch is stabilized at the high reservoir bottom surface close to the slope. Therefore, the upslope angle asphalt concrete often has problems such as continuous cold joints and loose rolling. In order to ensure the compaction and reliability of the anti-seepage body, layered, striped and segmented construction is adopted.
[0083] During the slope surface construction, the thickening layer and the anti-seepage layer are constructed separately. The lower anti-arc section and the slope surface construction can be implemented in the whole strip as needed; segmented construction points are set up at the upslope angle of 3 to 5 meters from the slope surface to the bottom of the high reservoir; the segmented construction points between different strips on the left and right and between different upper and lower layers shall not be less than 1 meter apart to avoid continuous cold joints. Then the winch is moved 6 to 10 meters away from the slope surface for segmented construction, and segmented construction points are also reserved. The segmented construction points between different strips on the left and right and between different upper and lower layers shall not be less than 1 meter apart to avoid continuous cold joints.
[0084] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.
Claims
1. A Z-shaped asphalt concrete reservoir bottom structure, characterized in that: It comprises a low reservoir bottom surface (1), a high reservoir bottom surface (5), and a Z-shaped anti-seepage body for connecting the low reservoir bottom surface (1) and the high reservoir bottom surface (5), wherein the Z-shaped anti-seepage body comprises a lower reverse arc surface (2), a slope surface (3), and an upper slope angle arc surface (4) which are arranged in sequence from bottom to top; The lower reservoir bottom surface (1), the upper reservoir bottom surface (5) and the slope surface (3) all include a transition layer (7), a crushed stone drainage cushion layer (8), a first asphalt concrete leveling bonding layer (9), a first asphalt concrete anti-seepage layer (10) and a first asphalt mastic sealing layer (11) which are sequentially arranged on the filling body (6) from bottom to top; The lower cambered surface (2) comprises a transition layer (7), a crushed stone drainage cushion layer (8), a second asphalt concrete leveling bonding layer (21), a lower asphalt concrete thickening layer (22), a lower reinforcement mesh (23), a second asphalt concrete anti-seepage layer (24) and a second asphalt mastic sealing layer (25) which are arranged on the filling body (6) in order from bottom to top; The upslope angle arc surface (4) comprises a transition layer (7), a crushed stone drainage cushion layer (8), a structural grid slope protection layer (41), a third asphalt concrete leveling bonding layer (42), an upper asphalt concrete thickening layer (43), an upper reinforcement mesh (44), a third asphalt concrete anti-seepage layer (45) and a third asphalt mastic sealing layer (46) which are arranged on the filling body (6) in sequence from bottom to top.
2. A reservoir Z-shaped asphalt concrete bottom structure according to claim 1, characterized in that: The low reservoir bottom surface (1) comprises a plurality of strip low reservoir bottom surfaces connected in sequence, the high reservoir bottom surface (5) comprises a plurality of strip high reservoir bottom surfaces connected in sequence, the Z-shaped anti-seepage body comprises a plurality of Z-shaped strip anti-seepage bodies connected in sequence, the upslope angle region of the Z-shaped strip anti-seepage body has a joint (12), the joints (12) on two adjacent Z-shaped strip anti-seepage bodies are discontinuous, and the joint (12) is a cold joint or a hot joint.
3. A Z-shaped asphalt concrete reservoir bottom structure according to claim 1, characterized in that: The height difference between the lower reservoir bottom surface (1) and the higher reservoir bottom surface (5) is 5m to 40m, and the slope ratio of the slope surface (3) is 1:1.7 to 1:2.
5.
4. A Z-shaped asphalt concrete reservoir bottom structure according to claim 1, characterized in that: The thickness of the transition layer (7) is 200 cm; the thickness of the gravel drainage cushion layer (8) at the positions of the lower reservoir bottom surface (1), the upper reservoir bottom surface (5), the lower anti-camber surface (2) and the slope surface (3) is 90 cm, and the thickness of the gravel drainage cushion layer (8) at the position of the upslope angle camber surface (4) is 60 cm to 70 cm; the first asphalt concrete leveling bonding layer (9), the second asphalt concrete leveling bonding layer (21) and the third asphalt concrete leveling bonding layer (41) are connected in sequence and their thickness is 10 cm; the first asphalt concrete anti-seepage layer (10), the second asphalt concrete anti-seepage layer (24) and the third asphalt concrete anti-seepage layer (45) are connected in sequence and their thickness is 10 cm; the first asphalt mastic sealing layer (11), the second asphalt mastic sealing layer (25) and the third asphalt mastic sealing layer (46) are connected in sequence and their thickness is 2 mm.
5. A Z-shaped asphalt concrete reservoir bottom structure according to claim 4, characterized in that: The structural grid slope protection layer (41) has a thickness of 20 cm to 30 cm, and the structural grid slope protection layer (41) comprises a concrete structural grid slope protection layer, a steel wire structural grid slope protection layer and a polyester structural grid slope protection layer.
6. A Z-shaped asphalt concrete reservoir bottom structure according to claim 1, characterized in that: The thickness of the upper asphalt concrete thickening layer (43) and the lower asphalt concrete thickening layer (22) are both 5 cm; the upper reinforcement mesh (44) and the lower reinforcement mesh (23) are both steel reinforcement meshes or polyester reinforcement meshes, the upper reinforcement mesh (44) extends up and down to 1 m outside the upslope angle arc surface (4), and the lower reinforcement mesh (23) extends up and down to 1 m outside the lower reverse arc surface (2).
7. A reservoir Z-shaped asphalt concrete bottom structure according to claim 1, characterized in that: The cut-and-fill boundary area may pass through the Z-shaped impermeable body once or multiple times, and an asphalt concrete wedge-shaped body or a trapezoidal body is arranged at the position where the cut-and-fill boundary area passes through the Z-shaped impermeable body; When the cut-fill boundary area passes through the lower anti-cambered surface (2), an asphalt concrete wedge or trapezoidal body is arranged between the lower reinforcement mesh (23) and the lower asphalt concrete thickening layer (22); When the cut-fill boundary area passes through the slope surface (3), an asphalt concrete wedge or trapezoidal body is arranged between the first asphalt concrete anti-seepage layer (10) and the first asphalt concrete leveling bonding layer (9) of the slope surface (3); When the cut-fill boundary area passes through the upslope angle arc surface (4), an asphalt concrete wedge or trapezoidal body is arranged between the upper reinforcement mesh (44) and the upper asphalt concrete thickening layer (43); The asphalt concrete wedge-shaped body or trapezoidal body is a fine-grained asphalt concrete wedge-shaped body or trapezoidal body.
8. A construction method for constructing the Z-shaped asphalt concrete reservoir bottom of a reservoir as claimed in claim 1, characterized in that: The construction method comprises the following steps: Step 1: Divide the reservoir bottom into sections and level the site: According to the reservoir bottom structure with different working surfaces with a certain height difference on site, use the cut-and-fill method to divide the Z-shaped asphalt concrete reservoir bottom, and level the low reservoir bottom area and the high reservoir bottom area to be constructed. The cut-and-fill boundary area can pass through the Z-shaped anti-seepage area to be constructed once or multiple times; Step 2: Determine the slope ratio of the Z-type anti-seepage body slope: Determine the slope ratio of the Z-type anti-seepage body slope according to the height difference between the low reservoir bottom area and the high reservoir bottom area. If the height difference is less than or equal to 20m, the slope ratio is 1:1.7 to 1:2.0; if the height difference is greater than 20m, the slope ratio is 1:2.0 to 1:2.5; Step 3: Construction of reservoir bottom zoning: First, construct the low reservoir bottom surface (1) and the high reservoir bottom surface (5) in the low reservoir bottom surface area and the high reservoir bottom surface area respectively; Step 4: Build a temporary transportation road: On the slope of the asphalt concrete anti-seepage layer, lay geotextile, thermal insulation cotton, 50cm thick fine aggregate and coarse aggregate with a thickness of 50cm or more from bottom to top, respectively, to ensure that the material transport vehicle does not damage the anti-seepage layer when going up and down. The laying width and slope ensure the safety of the material transport vehicle, and the road slope ratio shall not be less than the slope ratio of the anti-seepage structure plus 0.
5. The material transport vehicle can be tested in the test area outside the paving site to determine the ratio; Step 5: constructing a Z-shaped anti-seepage body from bottom to top using a construction equipment group: the Z-shaped anti-seepage body includes a plurality of Z-shaped strip anti-seepage bodies connected in sequence, the upslope angle region of the Z-shaped strip anti-seepage body has a joint (12), and the joints (12) on two adjacent Z-shaped strip anti-seepage bodies are discontinuous; Step 6: Dismantle the temporary transportation road: After all asphalt concrete construction work on the Z-shaped asphalt concrete bottom of the reservoir is completed, including the construction of the sealing layer, and all construction equipment groups are withdrawn, the temporary transportation road is dismantled.
9. The construction method of the Z-shaped asphalt concrete reservoir bottom according to claim 8, characterized in that: In step 5, an asphalt concrete wedge or trapezoidal body is set at the position where the cut-fill boundary area passes through the Z-shaped impermeable body; When the cut-fill boundary area passes through the lower anti-cambered surface (2), an asphalt concrete wedge or trapezoidal body is arranged between the lower reinforcement mesh (23) and the lower asphalt concrete thickening layer (22); When the cut-fill boundary area passes through the slope surface (3), an asphalt concrete wedge or trapezoidal body is arranged between the first asphalt concrete anti-seepage layer (10) and the first asphalt concrete leveling bonding layer (9) of the slope surface (3); When the cut-fill boundary area passes through the upslope angle arc surface (4), an asphalt concrete wedge or trapezoidal body is arranged between the upper reinforcement mesh (44) and the upper asphalt concrete thickening layer (43); The asphalt concrete wedge-shaped body or trapezoidal body is a fine-grained asphalt concrete wedge-shaped body or trapezoidal body.
10. The construction method of the Z-shaped asphalt concrete reservoir bottom according to claim 8, characterized in that: In step five, the construction equipment group includes a main gallows vehicle, an auxiliary gallows vehicle, a winch, a traction rope, a paving device, a rolling device, a dump truck and a water pump.