Side slope boulder stratum roadbed structure capable of reducing construction disturbance
By excavation in the slope road base, the design of the road base structure including the original soil and stone slope, the first gear structure and the second gear structure, the stability of the conventional road base protective structure is solved when the collapsed slope accumulates the lonely stone formation strata when the lone stone formation is covered with the lonely stone formation. The problem of reduction realizes the high stability and security of the road base, and reduces construction costs and disturbances.
Patent Information
- Application Number
- CN202420520875.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-18
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-03-18
AI Technical Summary
In the excavation of slope subgrades, the stability of conventional subgrade protective structures decreases when they encounter slope-collapsed cover layer and lonely stone formations, which has great construction disturbances, high cost, and difficult piles to form holes.
A base structure design including the original soil and stone slope, the first gear structure and the second gear structure. The second gear structure is fixed with the lone stone and the base rock from the bottom to the bottom. It is located on the outer side of the slope -slope lone stone formation circuit structure. The anchoring part is connected to form a stable road base structure.
The design improves the stability and security of the road base, reduces construction disturbances and costs, avoids the difficulty of piles into holes, and ensures the safety and economy of construction.
Smart Images
Figure CN222413118U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of roadbed structures, in particular to a roadbed structure for a side slope boulder stratum capable of reducing construction disturbance. Background Art
[0002] In slope roadbed excavation, retaining walls such as counterweight retaining walls and inclined retaining walls are commonly used roadbed protection structures. However, when encountering special geological structures such as landslide overburden layers and boulder-containing strata, the stability of conventional single roadbed protection structures is reduced and strengthening measures need to be taken.
[0003] Slope roadbed excavation usually adopts layered excavation from top to bottom. The method is to use excavation machinery to peel off the strongly weathered layer and use blasting technology to excavate the weakly differentiated layer (rock) to the designed outline; after the roadbed is excavated to the designed elevation, the roadbed protection structure is implemented on the outside of the roadbed. However, in the excavation of slope roadbed, the strata and geological conditions are not all ideal upper cover layer and lower bedrock. For the strata with boulders in the landslide overburden layer, when the size of the boulders is small, blasting or non-blasting technology can be used to break the boulders and excavate them. However, when the size of the boulders is larger than the width of the roadbed, after the removal of the large boulders, secondary disturbances may be caused to the boulders in the adjacent areas, resulting in large-scale collapse, and the excavation range will increase, which is not conducive to construction safety and cost control. In addition, large boulders existing at the bottom of the foundation of the slope roadbed containing boulder strata may deform under the repeated rolling and vibration of vehicle loads in the later stage, threatening the safety of the roadbed. In engineering practice, pile foundations are also used at the bottom of the slope shoulder retaining wall to meet the bearing capacity requirements, but it is difficult to drill holes for piles in the boulder strata sandwiched between the landslide overburden layer, and the application of piles has limitations.
[0004] Therefore, it is necessary to optimize the slope to improve the safety and stability of the roadbed and reduce the construction difficulty and cost. Utility Model Content
[0005] In view of the technical problems existing in the background technology, the utility model provides a slope boulder stratum roadbed structure that reduces construction disturbance, which can improve the safety and stability of the roadbed and reduce construction difficulty and construction cost.
[0006] In order to achieve the above purpose, the technical solution provided by the utility model is:
[0007] A roadbed structure for a slope and rock formation that reduces construction disturbance, comprising an original soil and rock slope, a first retaining structure and a second retaining structure;
[0008] The original soil and rock slope includes a landslide cover layer and bedrock, wherein the landslide cover layer covers the bedrock; the landslide cover layer includes stones, soil and a plurality of isolated rocks;
[0009] The first retaining structure and the second retaining structure are arranged vertically and closely together, the second retaining structure is integrally fixed to the boulder and the bedrock from top to bottom, and the second retaining structure is located on one side of the outer side of the roadbed structure close to the slope boulder formation.
[0010] Preferably, the maximum outer diameter of the boulder is greater than the thickness of the landslide cover layer, and the boulder is exposed on the surface of the soil and rock slope;
[0011] Preferably, the boulder is not higher than the height of a first intersection point between the boulder and the soil-rock slope in the longitudinal direction, and the first intersection point is the higher one of the two intersection points between the boulder and the soil-rock slope.
[0012] Preferably, the second retaining structure is integrally provided with fixing holes from the top to the bottom, and is fixed to the boulder and the bedrock by anchoring pieces.
[0013] Preferably, the first retaining structure is arranged in a suspended gap between the second retaining structure and the boulder to which the second retaining structure is fixed.
[0014] Preferably, the second retaining structure is also provided with a drainage hole.
[0015] Preferably, the drainage holes are arranged in the second retaining structure at a certain row spacing and column spacing.
[0016] Preferably, the stones include crushed stones and a plurality of stones.
[0017] Preferably, the stones are of different sizes.
[0018] Preferably, the solitary stone is suspended upside down, with the smaller end facing downwards and the larger end facing upwards.
[0019] The utility model has the following advantages and beneficial effects:
[0020] The utility model can form a stable roadbed structure, and compared with the traditional method of excavating a whole isolated rock, it can avoid deep disturbance of the slope and large-scale landslide of the slope, and has higher stability and safety;
[0021] The utility model can control the excavation scope under the premise of ensuring intrinsic safety, which is beneficial to soil and water conservation. At the same time, the roadbed excavation scope is effectively limited within the red line of land acquisition, which reduces the pre-coordination matters and reduces the pre-preparation costs.
[0022] The utility model reduces the difficulty of roadbed structure construction, avoids the problem of difficulty in pile drilling in the stratum containing large boulders on the slope, and reduces the construction cost and difficulty;
[0023] The roadbed of the utility model is safe and reliable, has high cost performance in construction, is easy to realize, and is convenient for promotion and implementation. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] Figure 1 A cross-sectional view of a roadbed structure in a rocky stratum on a slope that reduces construction disturbances provided by the utility model;
[0025] Figure 2 for Figure 1 A partial enlarged view of the second retaining structure;
[0026] Icons: 1-slope surface, 11-bedrock, 2-boulders, 3-first retaining structure, 4-second retaining structure, 41-drainage hole, 42-fixing hole, 5-anchor, 6-roadbed. DETAILED DESCRIPTION
[0027] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments.
[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0029] Example 1
[0030] A roadbed structure for rocky slopes that reduces construction disturbances, see Figure 1-Figure 2 , including the original soil-rock slope, the first retaining structure 3 and the second retaining structure 4;
[0031] The original soil and rock slope includes a landslide cover layer and a bedrock 11, wherein the landslide cover layer covers the bedrock 11; the landslide cover layer includes stones, soil and a plurality of isolated rocks 2;
[0032] The first retaining structure 3 and the second retaining structure 4 are arranged vertically and closely together, the top of the second retaining structure 4 is fixed to the boulder 2 and the bedrock 11, and the second retaining structure 4 is located on one side of the outer side of the stratum roadbed 6 structure close to the slope boulder 2.
[0033] Based on the structure of this embodiment, all or part of the boulder 2 can be used as part of the roadbed 6 to avoid secondary disturbance of the slope caused by the complete removal of the boulder 2. The excavation range can be controlled, and the stability of the roadbed 6 under the vibration of vehicle loads during operation can be improved.
[0034] Compared with the roadbed 6 protection of the pile foundation combined with the retaining structure, the roadbed 6 structure of this embodiment has a lower construction difficulty and avoids the problem of difficulty in drilling pile holes in the stratum containing large boulders 2 on the slope. The roadbed 6 protection structure is safe and controllable during the construction and operation period, has little construction difficulty, and can take into account both progress and cost.
[0035] Example 2
[0036] This embodiment is based on the technical solution of Embodiment 1 and further illustrates the structure of the solitary stone 2 and the like.
[0037] In this embodiment, the maximum outer diameter of the boulder 2 is greater than the thickness of the landslide cover layer, and the boulder 2 is exposed on the surface of the soil and rock slope, that is, the slope surface 1.
[0038] On the other hand, the boulder 2 is not higher than the height of the first intersection of the boulder 2 and the soil-rock slope in the longitudinal direction, and the first intersection is the higher one of the two intersections of the boulder 2 and the soil-rock slope. The specific implementation method is that after the second retaining structure 4 is implemented, the slope can be excavated from top to bottom according to the designed opening line, and the protruding part of the boulder 2 above the designed roadbed 6 can be removed by non-explosive technology such as expansion agent and rock cutter, that is, Figure 1 The part with number 21.
[0039] Example 3
[0040] This embodiment is based on the technical solution of Embodiment 1 and further explains the relevant parts of the supporting structure.
[0041] In this embodiment, the second retaining structure 4 is provided with fixing holes 42 from the top to the bottom, and is fixed to the boulder 2 and the bedrock 11 by anchors 5. When the foundation meets the designed bearing capacity of the foundation, the fixing holes 42 are reserved according to the arrangement of the anchors 5 as the positioning of the anchors 5 and the later construction channels, which can avoid damage to the second retaining structure 4 during the subsequent construction drilling process, and can also protect the second retaining structure 4 from damage. The anchors 5 pass through the second retaining structure 4, the overlying layer of the colluvial slope, the boulder 2 and the bedrock 11, so that the second retaining structure can be firmly connected to the deep stable stratum. It is particularly noted that anchors need to be provided from the top to the bottom of the retaining structure, so the second retaining structure 4 is provided with fixing holes 42 from the top to the bottom.
[0042] By using anchors 5 to connect the boulder 2 with the retaining structure of the roadbed 6, it is helpful to form a stable roadbed 6 structure. Compared with the traditional method of excavating the entire boulder 2, it can avoid deep disturbance of the slope and large-scale landslides of the slope. Under the premise of ensuring inherent safety, the excavation range is controllable and conducive to soil and water conservation. At the same time, the excavation range of the roadbed 6 is effectively limited within the land acquisition red line.
[0043] As a preferred solution, the first retaining structure 3 is arranged in the suspended gap between the second retaining structure 4 and the boulder 2 fixed by the second retaining structure 4, which can avoid the boulder 2 rolling down and causing large-scale slope collapse due to excavation disturbance during construction.
[0044] In addition, the second retaining structure 4 is preferably provided with drainage holes 41 to facilitate drainage of the roadbed 6 .
[0045] Furthermore, the drainage holes 41 are arranged in the second retaining structure at a certain row spacing and column spacing. The function of the drainage holes 41 is to drain the seepage water in the cover layer behind the retaining wall, and they are arranged in the retaining wall at a certain row spacing and column spacing.
[0046] Example 4
[0047] This embodiment is based on the technical solution of Embodiment 1 and further explains the relevant parts of various stones.
[0048] In this embodiment, the stones include gravel and a plurality of stones.
[0049] Furthermore, the sizes of the stones are different.
[0050] On the other hand, the isolated rock 2 is in an inverted arrangement, with the smaller end facing downward and the larger end facing upward. Before the slope is set out for excavation, the inverted part of the large isolated rock 2 on the slope can be filled with the first retaining structure 3 to stabilize the isolated rock 2, ensure the safety of the roadbed 6 during construction, and avoid instability during excavation.
[0051] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.
Claims
1. A roadbed structure for a slope and rock formation that reduces construction disturbance, characterized in that : comprising an original soil-rock slope, a first retaining structure (3) and a second retaining structure (4); The original soil and rock slope comprises a landslide cover layer and a bedrock (11), wherein the landslide cover layer covers the bedrock (11); the landslide cover layer comprises stones, soil and a plurality of isolated rocks (2); The first retaining structure (3) and the second retaining structure (4) are arranged vertically and closely together, and the second retaining structure (4) is fixed to the boulder (2) and the bedrock (11) as a whole from top to bottom, and the second retaining structure (4) is located on one side of the outer side of the structure of the stratum roadbed (6) close to the slope boulder (2).
2. A roadbed structure for reducing construction disturbance in a rocky stratum on a slope according to claim 1, characterized in that: The maximum outer diameter of the boulder (2) is greater than the thickness of the landslide cover layer, and the boulder (2) is exposed on the surface of the soil and rock slope.
3. A roadbed structure for reducing construction disturbance in a rocky stratum on a slope according to claim 2, characterized in that: The boulder (2) is not higher than the height of the first intersection point between the boulder (2) and the soil-rock slope in the longitudinal direction, and the first intersection point is the higher one of the two intersection points between the boulder (2) and the soil-rock slope.
4. The roadbed structure for reducing construction disturbance in a slope and boulder formation according to claim 1, characterized in that: The second retaining structure (4) is integrally provided with fixing holes (42) from the top to the bottom, and is fixed to the boulder (2) and the bedrock (11) via anchors (5).
5. The roadbed structure for reducing construction disturbance in a rocky stratum on a slope according to claim 4, characterized in that: The first supporting structure (3) is arranged in a suspended gap between the second supporting structure (4) and the boulder (2) to which the second supporting structure (4) is fixed.
6. The roadbed structure for reducing construction disturbance in a rocky stratum on a slope according to claim 5, characterized in that: The second retaining structure (4) is also provided with a drainage hole (41).
7. The roadbed structure for reducing construction disturbance in a rocky stratum on a slope according to claim 6, characterized in that: The drainage holes (41) are arranged in the second support structure at a certain row spacing and column spacing.
8. The roadbed structure for reducing construction disturbance in a rocky stratum on a slope according to claim 1, characterized in that: The stones include gravel and several stones.
9. The roadbed structure for reducing construction disturbance in a rocky stratum on a slope according to claim 8, characterized in that: Several of the stones are of varying sizes.
10. The roadbed structure for reducing construction disturbance in a rocky stratum on a slope according to claim 1, characterized in that: The solitary stone (2) is arranged in an upside-down manner, with the end with a smaller width facing downwards and the end with a larger width facing upwards.