A road surface slope adjustment structure and construction method thereof

Abstract

The present invention discloses a road surface slope adjustment structure. It includes a newly built road surface, a newly built road center line and a slope adjustment structure layer; the slope adjustment structure layer is located above the existing road surface and below the newly built road surface; the existing road surface, the slope adjustment structure layer and the newly built road surface form an integral structure, and the existing road center line and the newly built road center line are respectively located on both sides of the integral structure; the existing road surface and the newly built road surface have opposite slope directions; the slope adjustment structure layer and the newly built road surface have the same slope direction; the slope adjustment structure layer has multiple layers; the multiple slope adjustment structure layers are arranged from bottom to top. The present invention has the advantages of saving engineering workload and good connection effect between new and old road surfaces. The present invention also discloses a construction method of the road surface slope adjustment structure.

Description

Technical Field

[0001] The invention relates to the field of urban road reconstruction engineering, more specifically to a road surface slope adjustment structure. The invention also relates to a construction method of the road surface slope adjustment structure. Background Art

[0002] With the sustained and rapid development of my country's economy and society, the living standards of the people are improving day by day, and the number of vehicles on urban roads is also increasing day by day, which puts higher requirements on the quality and function of urban roads. The renovation of old roads in old urban areas is increasing day by day. Due to urban development and planning adjustments, the functional positioning of some roads has changed, and there are often situations where the width of the road is adjusted. Due to the restrictions of urban land use or other factors, when renovating roads, it is often necessary to widen the existing motor vehicle lanes on one side or asymmetrically widen them on both sides. Sometimes the width of the existing motor vehicle lanes is compressed to expand the space of the slow-moving system. These situations will cause the center line of the road to shift before and after the road renovation. Urban roads should generally adopt a two-way road arch cross slope from the center line of the road to both sides. The part between the center line of the new and old roads before and after the renovation needs to adjust the slope of the pavement structure. There are no relevant regulations for this situation in the current specifications. Relevant research on pavement overlay reconstruction often focuses on the treatment of pavement disease problems on old roads, and there are no relevant reports on this situation. In the practice of road reconstruction, this problem is often ignored, and the whole milling or overlay is directly carried out.

[0003] Therefore, it is necessary to develop a road slope adjustment structure and construction method that can adjust the slope of the section between the new and old road centers when the centerline of the road in a road reconstruction project is offset, save engineering workload, and have a good connection effect between the new and old road surfaces. Summary of the invention

[0004] The first purpose of the present invention is to provide a road surface slope adjustment structure. When the center line of the road is offset in a road reconstruction project, the slope of the part between the new and old road centers is adjusted, thereby saving engineering workload and achieving a good connection effect between the new and old road surfaces, so as to make up for the current lack of road surface slope adjustment structure when the center line of the road is offset in road reconstruction.

[0005] The second purpose of the present invention is to provide a construction method for the road surface slope adjustment structure, which saves investment and is convenient for construction.

[0006] In order to achieve the first object of the present invention, the technical solution of the present invention is: a road surface slope adjustment structure, characterized in that it includes a newly built road surface, a newly built road center line and a slope adjustment structure;

[0007] The slope adjustment structure is located above the existing road surface and below the newly built road surface;

[0008] The existing road surface, the slope adjustment structure and the newly constructed road surface form an integral structure, and the existing road centerline and the newly constructed road centerline are located on both sides of the integral structure respectively;

[0009] The slope of the existing road surface is opposite to that of the newly built road surface;

[0010] The slope adjustment structure has the same slope as the newly built road surface;

[0011] The slope adjustment structure includes multiple slope adjustment structural layers; the multiple slope adjustment structural layers are arranged from bottom to top.

[0012] In the above technical solution, when the existing road surface is a cement road surface, the slope adjustment structure layer is graded crushed stone;

[0013] When the existing road surface is asphalt pavement, the slope adjustment structure layer is asphalt gravel.

[0014] In the above technical solution, when the existing road surface is a cement road surface, the thickness of each layer of the slope adjustment structure layer is 10 cm to 20 cm.

[0015] In the above technical solution, when the existing road surface is an asphalt road surface, the thickness of each slope adjustment structure layer is less than or equal to 10 cm.

[0016] In the above technical solution, the thickness of each slope adjustment structure layer located above the bottom layer is 10 cm.

[0017] In order to achieve the second purpose of the present invention, the technical solution of the present invention is: the construction method of the road surface slope adjustment structure is characterized by comprising the following steps:

[0018] Step 1: First clean the existing road surface during construction;

[0019] Step 2: From bottom to top, according to the width and thickness of each slope adjustment structure layer, the slope adjustment structure layer is laid in layers and compacted to form a slope adjustment structure until it meets the requirements (i.e., meets the requirements of relevant national or industry design and construction specifications);

[0020] Step 3: Construct new road pavement above the paved slope adjustment structure.

[0021] In the above technical solution, the cross slope of the existing road surface is i 0 , the cross slope of the new road surface is i 1 ;i 1 with i 0 The slope direction is opposite;

[0022] The horizontal slope of the slope adjustment structure layer is the same as the horizontal slope of the newly built road surface, both of which are i 1 ;

[0023] The distance between the center line of the existing road and the center line of the new road is B.

[0024] In the above technical solution, when the existing road surface is a cement road surface, the slope adjustment structure layer uses graded crushed stones with a compaction thickness of 10 cm to 20 cm; in step 2, the graded crushed stones are paved in layers and compacted;

[0025] At the center line of the new road, the total thickness of the slope adjustment structure is ΔH = B × (i 0 +i 1 ), the number of layers of the slope adjustment structure layer Indicates rounding up (e.g. ).

[0026] In the above technical solution, the thickness of the slope adjustment structure layer at the bottom layer at the center line of the new road is h 1 =ΔH-(n-1)×10cm, 10cm <h 1 ≤20cm;

[0027] The thickness of each slope adjustment structure layer above the lowest slope adjustment structure layer at the center line of the new road and at the boundary of the layer is 10 cm, and the thickness at the boundary of the layer immediately adjacent to the lower layer is 20 cm (i.e., the thickness of each slope adjustment structure layer above the lowest slope adjustment structure layer at the center line of the new road is 10 cm, the thickness of each slope adjustment structure layer above the lowest slope adjustment structure layer at the boundary of the layer immediately adjacent to the lower layer is 20 cm);

[0028] The width of the slope adjustment structure layer at the bottom starting from the center line of the new road is b 1 =Bn×10cm / (i 0 +i 1 ), that is, the width of each layer b 1 、b 2 、b 3 The right side is different from the center line of the road, and each layer increases by 10cm / (i 0 +i 1 ); The width b of each slope adjustment structure layer above the lowest slope adjustment structure layer j The width of the layer below is greater than b j-1 10cm more / (i 0 +i 1 ), that is, b j =b j-1 +10cm / (i 0 +i 1 ); the remaining part of the top slope adjustment structure is included in the pavement of the new road.

[0029] In the above technical solution, when the existing road surface is an asphalt pavement, the slope adjustment structure layer uses asphalt macadam with a compacted thickness less than or equal to 10 cm for slope adjustment;

[0030] In step one, during construction, first, taking advantage of the fact that asphalt pavement is convenient for precise milling, the existing asphalt pavement is divided into n sections (the number of sections of the existing asphalt pavement is equal to the number of layers of the slope adjustment structure layer), and each section is milled by 0 - 10 cm; then, according to the width and thickness of each layer from bottom to top, the slope adjustment structure layer (i.e., asphalt macadam) is laid in layers and compacted until it meets the requirements, and then the construction of the upper layer is carried out;

[0031] At the center line of the new road, the total thickness of the slope adjustment structure is ΔH = B×(i 0 +i 1 ), and the number of layers of the slope adjustment structure layer represents rounding up (e.g., );

[0032] The thickness of the slope adjustment structure layer at the bottommost layer is h 1 = ΔH - (n - 1)×10 cm, 3 cm ≤ h 1 ≤ 10 cm; when h 1 < 3 cm, considering the reasonable minimum compaction thickness of asphalt macadam and construction simplicity, it can be combined with its adjacent upper layer as the bottommost layer; the thickness of each slope adjustment structure layer above the bottommost layer is 10 cm (i.e., except for the bottommost layer, the thickness of the above layers is 10 cm);

[0033] The width of the slope adjustment structure layer at the bottommost layer starting from the center line of the new road is b 1 = B - (n - 1)×10 cm / (i 0 +i 1 ); the width of each slope adjustment structure layer above the bottommost layer is 10 cm / (i 0 +i 1 ) more than its adjacent lower layer.

[0034] The present invention has the following advantages:

[0035] The present invention is a road surface slope adjustment structure and construction method, which is used to adjust the slope of the part between the new and old road center lines in the case of the offset of the road center line in the road reconstruction project. Compared with overall milling or paving, it saves the project quantity and has a good connection effect between the new and old road surfaces. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a schematic diagram of the slope adjustment structure of the present invention when the existing road is a cement pavement.

[0037] Figure 2 It is a schematic diagram of the slope adjustment structure of the present invention when the existing road is an asphalt pavement.

[0038] Figure 1 , Figure 2 Medium, d 1 It indicates the thickness at the boundary of each slope adjustment structure layer above the lowest slope adjustment structure layer, in cm;

[0039] d 2 It indicates the thickness at the boundary of each slope adjustment structure layer above the lowest slope adjustment structure layer, in cm;

[0040] d 3 It indicates the thickness of the lower boundary of each slope adjustment structure layer above the lowest slope adjustment structure layer, in cm;

[0041] h 1 Indicates the thickness of the slope adjustment structure layer at the bottom, in cm;

[0042] ΔH represents the total thickness of the slope adjustment structure, in cm;

[0043] C represents the width of each slope adjustment structure layer above the lowest slope adjustment structure layer, which is greater than the width of the layer immediately below it, in cm;

[0044] b 1 It indicates the width of the lowest slope adjustment structure layer from the center line of the new road, in cm;

[0045] b 2 It indicates the width of the first layer of the slope adjustment structure above the lowest layer of the slope adjustment structure starting from the center line of the new road, in cm;

[0046] b 3 It indicates the width of the second layer of the slope adjustment structure above the lowest layer from the center line of the new road, in cm;

[0047] B represents the distance between the existing road centerline and the new road centerline, in cm;

[0048] D stands for milled asphalt;

[0049] i 1 Indicates the cross slope of the newly built road surface;

[0050] i 0 Indicates the cross slope of the existing road surface.

[0051] In the figure, 1-existing cement pavement, 2-new road pavement, 3-existing road centerline, 4-new road centerline, 5-slope adjustment structure layer. DETAILED DESCRIPTION

[0052] The following is a detailed description of the implementation of the present invention in conjunction with the accompanying drawings, but they do not constitute a limitation of the present invention and are only given as examples. At the same time, the advantages of the present invention are made clearer and easier to understand through the description.

[0053] Example

[0054] The present invention is now described in detail by taking the application of the present invention to a certain existing road surface for road slope adjustment as an example, which also has a guiding role in the application of the present invention to slope adjustment of other road surfaces.

[0055] The road surface slope adjustment structure in this embodiment includes an existing road surface 1, a newly constructed road surface 2, an existing road center line 3, a newly constructed road center line 4 and a slope adjustment structure layer 5.

[0056] The slope adjustment structure layer 5 is located above the existing road surface 1 and below the newly built road surface 2. The cross slope of the existing road surface 1 is i 0 =2.0%, the cross slope of the newly built road surface 2 is i 1 =1.5%,i 1 and i 0 The horizontal slope of the slope adjustment structure layer 5 is the same as the horizontal slope of the newly built road surface 2, both of which are i 1 The distance between the existing road centerline 3 and the newly built road centerline 4 is B = 10m.

[0057] like Figure 1 As shown, in this embodiment, when the existing road surface is a cement road surface, the slope adjustment structure layer 5 uses n layers of graded crushed stones with a compacted thickness of 10 cm to 20 cm for slope adjustment.

[0058] At the center line 4 of the new road, the total thickness of the slope adjustment structure layer 5 is ΔH = B × (i 0 +i 1 )=10m×(2.0%+1.5%)=35cm, the number of layers of slope adjustment structure layer 5 layer.

[0059] The thickness of the bottom layer of the slope adjustment structure layer 5 at the center line 4 of the new road is h 1 =ΔH-(n-1)×10cm=35cm-(3-1)×10cm=15cm, which is consistent with 10cm <h 1≤20cm requirement; except for the lowest layer, the thickness of each slope adjustment structure layer 5 above the lowest layer is 10cm at the center line 4 of the new road and at the boundary of the layer, and 20cm at the boundary adjacent to the lower layer (that is, the thickness of each slope adjustment structure layer above the lowest slope adjustment structure layer at the center line of the new road is 10cm, the thickness of each slope adjustment structure layer above the lowest slope adjustment structure layer at the boundary is 10cm, and the thickness of each slope adjustment structure layer above the lowest slope adjustment structure layer 5 at the boundary adjacent to the lower layer is 20cm).

[0060] The width of the bottom layer of the slope adjustment structure layer 5 from the center line 4 of the new road is b 1 =Bn×10cm / (i 0 +i 1 )=10m-3×10cm / (2.0%+1.5%)=1.42m. Except for the bottom layer, the width of the slope adjustment structure layer 5 of the two layers above the bottom slope adjustment structure layer 5 is 10cm / (i 0 +i 1 )=10cm / (2.0%+1.5%)=2.86m, that is, the width of the second layer is 1.42m+2.86m=4.28m, the width of the third layer is 4.28m+2.86m=7.14m, and the remaining part of the uppermost slope adjustment structure (that is, the 2.86m width part close to the center line of the existing road) is included in the scope of the newly built road pavement 2.

[0061] During construction, the existing cement pavement is first cleaned, and then graded gravel is laid layer by layer from bottom to top according to the width and thickness of each layer and compacted. The upper layer construction is carried out when it meets the requirements (that is, meets the requirements of relevant national or industry design and construction specifications).

[0062] like Figure 2 As shown, in this embodiment, when the existing road surface 1 is an asphalt road surface, the asphalt road surface is easy to finely mill, and the existing asphalt road surface is divided into n sections, each section is milled 0 to 10 cm, and then n layers of asphalt gravel with a thickness of no more than 10 cm are used to adjust the slope.

[0063] At the center line 4 of the new road, the total thickness of the slope adjustment structure layer 5 is ΔH = B × (i 0 +i 1 )=10m×(2.0%+1.5%)=35cm, the number of layers of slope adjustment structure layer 5 layer.

[0064] The thickness of the bottom layer of the slope adjustment structure layer 5 is h 1 =ΔH-(n-1)×10cm=35cm-(4-1)×10cm=5cm, which satisfies 3cm≤h 1≤10cm requirement. Except for the lowest layer, the thickness of each slope adjustment structure layer 5 above the lowest slope adjustment structure layer 5 is 10cm.

[0065] The width of the lowest layer of the slope adjustment structure layer 5 starting from the center line 4 of the new road is b 1 =B-(n-1)×10cm / (i 0 +i 1 )=10m-(4-1)×10cm / (2.0%+1.5%)=1.42m. Except for the bottom layer, the width of the above three layers is 10cm / (i 0 +i 1 )=10cm / (2.0%+1.5%)=2.86m, that is, the width of the second layer is 1.42m+2.86m=4.28m, the width of the third layer is 4.28m+2.86m=7.14m, and the width of the third layer is 7.14+2.86m=10m.

[0066] During construction, the existing asphalt pavement is first milled in sections of 0 to 10 cm, and then asphalt gravel is laid layer by layer from bottom to top according to the width and thickness of each layer and compacted. The upper layer construction is carried out when it meets the requirements.

[0067] Conclusion: In the case where the center line of the road is offset during the road reconstruction project, this embodiment adjusts the slope of the portion between the center lines of the new and old roads; compared with overall milling or overlaying, this embodiment saves engineering workload and has a better connection effect between the new and old road surfaces.

[0068] Other parts not described belong to the prior art.

Claims

1. A road slope adjustment structure, Features: It includes a newly constructed road surface (2), a newly constructed road centerline (4) and a slope adjustment structure; The slope adjustment structure is located above the existing road surface (1) and below the newly constructed road surface (2); The existing road surface (1), the slope adjustment structure and the newly constructed road surface (2) form an integral structure, and the existing road centerline (3) and the newly constructed road centerline (4) are respectively located on both sides of the integral structure; The slopes of the existing road surface (1) and the newly constructed road surface (2) are opposite; The slope adjustment structure has the same slope direction as the newly constructed road surface (2); The slope adjustment structure comprises a plurality of slope adjustment structural layers (5); the plurality of slope adjustment structural layers (5) are arranged from bottom to top; The cross slope of the existing road surface (1) is i 0 , the cross slope of the newly built road surface (2) is i 1 ; The distance between the existing road centerline (3) and the newly built road centerline (4) is B; When the existing road surface is a cement road surface, the total thickness of the slope adjustment structure at the center line (4) of the new road is ΔH = B × (i 0 +i 1 ), the number of layers of the slope adjustment structure layer (5) It means rounding up, and the unit of ΔH is cm; the width of the slope adjustment structure layer (5) at the bottom starting from the center line (4) of the new road is b 1 =Bn×10cm / (i 0 +i 1 ); the width b of each layer of the slope adjustment structure layer (5) above the lowest layer of the slope adjustment structure layer (5) j The width of the layer below is greater than b j-1 10cm more / (i 0 +i 1 ), that is, b j =b j-1 +10cm / (i 0 +i 1 ); When the existing road surface (1) is an asphalt road surface, the total thickness of the slope adjustment structure at the center line (4) of the new road is ΔH = B × (i 0 +i 1 ), the number of layers of the slope adjustment structure layer (5) The width of the slope adjustment structure layer (5) at the bottom starting from the center line of the new road is b 1 =B-(n-1)×10cm / (i 0 +i 1 ); The width of each layer of the slope adjustment structure layer (5) above the lowest layer is 10 cm / (i 0 +i 1 ).

2. The road surface slope adjustment structure according to claim 1, Features: When the existing road surface (1) is a cement road surface, the slope adjustment structure layer (5) is graded crushed stone; When the existing road surface (1) is an asphalt road surface, the slope adjustment structure layer (5) is asphalt crushed stone.

3. The road surface slope adjustment structure according to claim 2, Features: When the existing road surface (1) is a cement road surface, the thickness of each layer of the slope adjustment structure layer (5) is 10 cm to 20 cm.

4. The road surface slope adjustment structure according to claim 2, Features: When the existing road surface (1) is an asphalt road surface, the thickness of each slope adjustment structure layer (5) is less than or equal to 10 cm.

5. The road surface slope adjustment structure according to claim 4, Features: The thickness of each slope adjustment structure layer (5) located above the bottom layer is 10 cm.

6. A construction method for a road surface slope adjustment structure according to any one of claims 1 to 5, Features: The following steps are included: Step 1: During construction, first clean the existing road surface (1); Step 2: from bottom to top, the slope adjustment structure layer (5) is layered and laid according to the width and thickness of each layer of the slope adjustment structure layer (5), and compacted to form a slope adjustment structure until it meets the requirements; Step 3: construct a new road surface (2) above the paved slope adjustment structure.

7. The construction method of the road surface slope adjustment structure according to claim 6, Features: The cross slope of the existing road surface (1) is i 0 , the cross slope of the newly built road surface (2) is i 1 ;i 1 with i 0 The slope direction is opposite; The cross slope of the slope adjustment structure layer (5) is the same as the cross slope of the newly built road surface (2), both of which are i 1 ; The distance between the existing road centerline (3) and the newly constructed road centerline (4) is B.

8. The construction method of the road surface slope adjustment structure according to claim 7, Features: When the existing road surface is a cement road surface, the slope adjustment structure layer (5) is made of graded crushed stone with a compaction thickness of 10 cm to 20 cm; At the center line (4) of the new road, the total thickness of the slope adjustment structure is ΔH = B × (i 0 +i 1 ), the number of layers of the slope adjustment structure layer (5) Indicates rounding up.

9. The construction method of the road surface slope adjustment structure according to claim 8, Features: The thickness of the slope adjustment structure layer (5) at the bottom layer at the center line (4) of the new road is h 1 =ΔH-(n-1)×10cm, 10cm <h 1 ≤20cm; The thickness of each layer of the slope adjustment structure layer (5) above the lowest layer of the slope adjustment structure layer (5) at the center line (4) of the newly built road is 10 cm, the thickness of each layer of the slope adjustment structure layer (5) above the lowest layer of the slope adjustment structure layer (5) at the boundary is 10 cm, and the thickness of each layer of the slope adjustment structure layer (5) above the lowest layer of the slope adjustment structure layer (5) at the boundary of the next lower layer is 20 cm; The width of the slope adjustment structure layer (5) at the bottom starting from the center line (4) of the new road is b. 1 =Bn×10cm / (i 0 +i 1 ); the width b of each layer of the slope adjustment structure layer (5) above the lowest layer of the slope adjustment structure layer (5) j The width of the layer below is greater than b j-1 10cm more / (i 0 +i 1 ), that is, b j =b j-1 +10cm / (i 0 +i 1 ).

10. The construction method of the road surface slope adjustment structure according to claim 7, Features: When the existing road surface (1) is an asphalt road surface, In step 1, the existing asphalt pavement is divided into n sections, and each section is milled 0 to 10 cm; the slope adjustment structure layer (5) uses asphalt crushed stone with a compaction thickness less than or equal to 10 cm; At the center line (4) of the new road, the total thickness of the slope adjustment structure is ΔH = B × (i 0 +i 1 ), the number of layers of the slope adjustment structure layer (5) The thickness of the slope adjustment structure layer (5) at the bottom is h 1 =ΔH-(n-1)×10cm, 3cm≤h 1 ≤10cm; The thickness of each layer of slope adjustment structure layer (5) above the lowest layer of slope adjustment structure layer (5) is 10 cm; The width of the slope adjustment structure layer (5) at the bottom starting from the center line of the new road is b 1 =B-(n-1)×10cm / (i 0 +i 1 ); The width of each layer of the slope adjustment structure layer (5) above the lowest layer is 10 cm / (i 0 +i 1 ).

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