Soft soil roadbed reinforcing structure for municipal road engineering

Abstract

The utility model discloses a municipal road engineering soft soil roadbed reinforcing structure, and relates to the technical field of road construction, the municipal road engineering soft soil roadbed reinforcing structure comprises a bottom layer, a drainage layer laid on the bottom layer and a surface layer laid on the drainage layer, a plurality of drainage pipes are laid in the drainage layer at intervals along the road extension direction, the drainage pipes extend along the road width direction, and the drainage pipes are arranged on the surface layer. A plurality of water seepage holes are formed in the upper sides, close to the surface layer, of the drainage pipes at intervals, and the drainage pipes are located at different heights. The soft soil roadbed has the effect that the technical problems that the soft soil roadbed is poor in water permeability and is prone to local collapse due to water accumulation can be solved.

Description

Technical Field

[0001] The present application relates to the technical field of road construction, and in particular to a soft soil roadbed reinforcement structure for a municipal road project. Background Art

[0002] Road subgrade has important functions such as bearing and transmitting vehicle load, supporting the pavement structure, maintaining subgrade stability, drainage and slope protection, etc. These functions jointly ensure the normal operation of the road and driving safety. Different construction methods are required for subgrades with different strength structures to ensure the stability of the subgrade.

[0003] Soft soil roadbed has relatively large compressibility and rheology, and is prone to uneven settlement under load. Usually, the construction process is to remove the loose soil of the base layer, pre-compact the base layer by pre-compacting method, and then lay fine sand and gravel, waste slag, etc. as a cushion layer. After compaction, the normal concrete laying procedure of the road is carried out. During laying, only drainage ditches are opened on both sides of the road for drainage; however, the water permeability of soft soil roadbed is poor. When the water on the road surface seeps, it is impossible to ensure that the accumulated water is discharged in time, which affects the stability of the roadbed and causes partial collapse of the roadbed. Utility Model Content

[0004] In order to improve the technical problem that soft soil roadbed has poor water permeability and is prone to local collapse due to water accumulation, the present application provides a soft soil roadbed reinforcement structure for a municipal road project.

[0005] The present application provides a soft soil roadbed reinforcement structure for a municipal road project, which adopts the following technical solutions:

[0006] A soft soil roadbed reinforcement structure for a municipal road project comprises a bottom layer, a drainage layer laid on the bottom layer, and a surface layer laid on the drainage layer, wherein a plurality of drainage pipes are laid at intervals in the drainage layer along the extension direction of the road, the drainage pipes extend along the width direction of the road, and at least one end is connected to the municipal drainage system, a plurality of seepage holes are provided at intervals on the upper side of the drainage pipes close to the surface layer, and the plurality of drainage pipes are at different heights.

[0007] By adopting the above technical solution, multiple drainage pipes are laid in the drainage layer to discharge the internal water in time. The drainage pipes at different heights can discharge the water that has infiltrated to different depths in time, reducing the possibility of continued infiltration. The drainage pipe has multiple seepage holes only on the upper side, which ensures that the infiltrated water can enter the drainage pipe through the seepage holes and be discharged, while preventing the water entering the drainage pipe from seeping out again, so as to improve the technical problem of poor water permeability of soft soil roadbed and easy local collapse due to water accumulation.

[0008] In summary, this application includes the following beneficial technical effects:

[0009] 1. Multiple drainage pipes are laid at intervals along the extension direction of the road in the drainage layer to timely discharge the water that has seeped into the roadbed. Drainage pipes are set at different heights to timely discharge water that has seeped into different depths, thereby reducing the possibility of continued seepage. The drainage pipe has multiple seepage holes only on the upper side to ensure that the seeped water can enter the drainage pipe through the seepage holes and be discharged, while preventing the water that has entered the drainage pipe from seeping out again, thereby improving the technical problem that the soft soil roadbed has poor water permeability and is prone to local collapse due to water accumulation.

[0010] 2. All drainage pipes are connected into a whole by setting transition rods, and support piles are used to form vertical support for the drainage pipes to improve the structural strength of the roadbed and reduce the extrusion damage of the drainage pipes by force transmission;

[0011] 3. The diagonal bars support the transition bars, so that the pressure from the road surface on the drainage pipes and transition bars can be transmitted to the bottom layer. The transition bars, diagonal bars, support piles and drainage pipes form a network structure to strengthen the road foundation. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a cross-sectional view of a soft soil roadbed reinforcement structure for a municipal road engineering according to the utility model.

[0013] Figure 2 yes Figure 1 A partial enlarged view of .

[0014] Figure 3 It is a partial structural schematic diagram of the soft soil roadbed reinforcement structure of the municipal road engineering of the utility model, mainly showing one of the layout methods of the drainage pipe.

[0015] Figure 4 It is a partial structural schematic diagram of the soft soil roadbed reinforcement structure of the municipal road engineering of the utility model, mainly showing the second arrangement method of the drainage pipe.

[0016] Explanation of the accompanying reference numerals: 1. bottom layer; 11. base layer; 12. anti-seepage geotextile layer; 13. fine stone layer; 2. drainage layer; 21. clay layer; 22. coarse stone layer; 3. surface layer; 31. sand and gravel cushion layer; 32. improved layer; 33. concrete layer; 4. drainage pipe; 41. seepage hole; 5. seepage geotextile layer; 6. transition rod; 61. support pile; 62. diagonal rod; 7. guardrail wall. DETAILED DESCRIPTION

[0017] The following is combined with Figure 1-4 This application is described in further detail.

[0018] The embodiment of the present application discloses a soft soil roadbed reinforcement structure for a municipal road project.

[0019] Reference Figure 1 and Figure 2 The soft soil roadbed reinforcement structure of a municipal road project comprises a bottom layer 1, a drainage layer 2 laid on the bottom layer 1 and a surface layer 3 laid on the drainage layer 2. A plurality of drainage pipes 4 are laid at intervals in the drainage layer 2 along the extension direction of the road. The drainage pipes 4 extend along the width direction of the road and are connected to the municipal drainage system at least at one end. A plurality of seepage holes 41 are spaced apart on the upper side of the drainage pipe 4 near the surface layer 3, and the plurality of drainage pipes 4 are at different heights.

[0020] By laying multiple drainage pipes 4 in the drainage layer 2, the water inside the road can be discharged in time. The drainage pipes 4 at different heights can discharge the water that has infiltrated to different depths in time, reducing the possibility of continued infiltration. The drainage pipes 4 have multiple seepage holes 41 only on the upper side, which ensures that the infiltrated water can enter the drainage pipes 4 through the seepage holes 41 and be discharged, while preventing the water entering the drainage pipes 4 from seeping out again, so as to improve the technical problem that the soft soil roadbed has poor permeability and is prone to local collapse due to water accumulation.

[0021] Reference Figure 3 In one embodiment, the drain pipe 4 is tilted as a whole, and the end connected to the municipal drainage system is the lower end to accelerate the discharge of water. A plug is provided at the top of the drain pipe 4 to form a closed structure.

[0022] Reference Figure 4 In another embodiment, both ends of the drain pipe 4 are tilted downward, and the middle end is the high end, and one end connected to the municipal drainage system at both ends is the low end, so that water can be discharged from both ends.

[0023] As one of the specific arrangements of the drain pipe 4, refer to Figure 1 , multiple drainage pipes 4 are distributed in two layers at intervals.

[0024] As the second specific arrangement of the drain pipe 4, refer to Figure 1 , the plurality of drainage pipes 4 can also be distributed in three layers at intervals.

[0025] When a plurality of drainage pipes 4 are projected onto the same horizontal plane, the projections of the drainage pipes 4 are connected to each other or even overlapped to ensure sufficient drainage of the infiltrating water.

[0026] In the embodiment of the utility model, the drainage pipe 4 can be a prefabricated cement pipe.

[0027] The drainage pipe 4 is a circular pipe. When fine particles (such as fine stones) gradually move downward under the action of gravity or other external forces due to roadbed seepage, the arc surface structure formed on the outside of the drainage pipe 4 can form a guiding effect to prevent the fine stones from clogging the seepage holes 41.

[0028] Reference Figure 1 and Figure 2 The bottom layer 1 includes a base layer 11 , an impermeable geotextile layer 12 laid on the base layer 11 , and a fine stone layer 13 laid on the impermeable geotextile layer 12 , and the drainage layer 2 is laid on the fine stone layer 13 .

[0029] The anti-seepage geotextile layer 12 prevents water from seeping into the base layer 11, thereby protecting the base layer 11 and preventing moisture from penetrating into the base layer 11, thereby avoiding foundation settlement and damage. At the same time, the anti-seepage geotextile layer 12 can also prevent harmful substances in the soil from entering the groundwater through penetration, thereby protecting the environment. The fine stone layer 13 can form a soft foundation for laying the drainage layer 2, and can protect the anti-seepage geotextile layer 12 to prevent it from being damaged due to direct construction of the drainage layer 2.

[0030] The drainage layer 2 includes a clay layer 21 laid on the fine stone layer 13 and a coarse stone layer 22 laid on the clay layer 21. The drainage pipe 4 is arranged in the coarse stone layer 22.

[0031] The gaps between the coarse stone layers 22 are used to ensure that the infiltrating water quickly infiltrates and enters the drainage pipe 4 for discharge, thereby reducing the possibility of roadbed damage caused by water accumulation. The clay layer 21 can reduce the possibility of continuous water infiltration.

[0032] The clay layer 21 is laid on the fine stone layer 13 to fill the gaps between the fine stone layers 13, thereby improving the compactness and stability of the road. At the same time, it can also enhance the waterproof performance of the road.

[0033] Among them, both the coarse stone layer 22 and the fine stone layer 13 can be made of sand, gravel, waste slag, etc., and the particle size of the coarse stone layer 22 is larger than that of the fine stone layer 13. The coarse stone layer 22 is located on the upper side of the fine stone layer 13, which helps to disperse and transfer vehicle loads and reduce the risk of stress concentration and road damage. At the same time, the fine stone layer 13, as a base layer, can provide better support and stability to ensure the firmness and durability of the entire road structure.

[0034] The surface layer 3 includes a gravel cushion layer 31 laid on the drainage layer 2 , an improved layer 32 laid on the gravel cushion layer 31 , and a concrete layer 33 laid on the improved layer 32 .

[0035] The gravel cushion layer 31 is used for leveling, and the improvement layer 32 is used to accelerate the consolidation of the soft soil and improve the bearing capacity, so as to form a stable foundation for laying the concrete layer 33.

[0036] Among them, the improved layer 32 can be improved by using fly ash, improvers, etc., which can reduce the settlement and accelerate the drainage and consolidation of the foundation, and improve the bearing capacity and stability of the road.

[0037] The gravel cushion layer 31 has good water permeability and drainage performance, and can quickly drain rainwater from the road surface and discharge it through the drain pipe 4 to keep the road surface clean and dry. At the same time, it can also effectively avoid cracking and damage to the road surface caused by freezing and expansion of water at night.

[0038] Reference Figure 3 and Figure 4 A retaining wall 7 is fixed on both sides of the drainage layer 2 and the surface layer 3, and the retaining wall 7 is fixed on the upper side of the bottom layer 1.

[0039] The berm 7 can be built with stone blocks or the like, and the drainage end of the drainage pipe 4 passes through the berm 7 to achieve drainage.

[0040] The protection of the drainage layer 2 and the surface layer 3 is formed by the berm 7, the possibility of water infiltration from the side is reduced, and soil loss and landslides are effectively prevented, while the structural strength is improved, thereby protecting the stability of the roadbed.

[0041] Reference Figure 1 and Figure 2 A permeable geotextile layer 5 is laid on the upper side of the drainage pipe 4 close to the surface layer 3, and the permeable geotextile layer 5 covers the seepage holes 41 to ensure that water can seep into the drainage pipe 4. At the same time, the permeable geotextile layer 5 is used to protect the seepage holes 41 and prevent fine stones from entering the drainage pipe 4.

[0042] Two adjacent drainage pipes 4 located at different heights are connected to at least one transition rod 6 at the same time. All the drainage pipes 4 are connected to form a whole through the transition rod 6 to improve the structural strength of the roadbed and reduce foundation settlement and deformation. When the drainage pipe 4 on the top is subjected to force, the force can be transmitted to the drainage pipe 4 on the lower side through the transition rod 6 to achieve the effect of force release.

[0043] In one embodiment, one transition bar 6 is provided and arranged along the length direction of the drain pipe 4, and both ends of the drain pipe 4 are respectively fixedly connected to the lower side of the drain pipe 4. The transition bar 6 forms a plate-like structure and is arranged obliquely, so that the infiltrating water is fully guided to the drain pipe 4, thereby further improving the technical problem that the soft soil roadbed has poor water permeability and is prone to local collapse due to water accumulation.

[0044] In another embodiment, a plurality of transition rods 6 are arranged at intervals, and a mesh structure is formed by a plurality of drainage pipes 4 and a plurality of transition rods 6, which can improve the stability and structural strength of the rough stone layer 22 and the entire road foundation structure.

[0045] A plurality of support piles 61 extending into the bottom layer 1 are fixed to the lower end of each drainage pipe 4. The plurality of support piles 61 are arranged at intervals along the length direction of the drainage pipe 4. The force of the drainage pipe 4 is vertically transferred to the bottom layer 1 through the support piles 61. At the same time, the connection strength between the bottom layer 1 and the drainage layer 2 is improved through the support piles 61.

[0046] Specifically, the support piles 61 may be concrete piles, the lower ends of which extend into the base layer 11 to form a stable support structure.

[0047] The adjacent transition bars 6 and support piles 61 are connected with inclined bars 62 , which support the transition bars 6 , so that the pressure from the road surface borne by the drainage pipes 4 and transition bars 6 can be transmitted to the bottom layer 1 .

[0048] The upper end of the inclined rod 62 extends into the coarse stone layer 22, and the lower end at least extends into the clay layer 21, or extends downward into the clay layer 21 and the fine stone layer 13 at the same time, so as to form a pulling effect on the multi-layer structure and improve the structural strength.

[0049] As the specific construction scheme of the utility model:

[0050] First, the base layer 11 is leveled and compacted, and at the same time, the support piles 61 are driven into the base layer 11;

[0051] The anti-seepage geotextile layer 12 and the fine stone layer 13 are laid successively and leveled;

[0052] Construction of the berm 7 is performed at both ends of the fine stone layer 13;

[0053] Then, the clay layer 21 and the rough stone layer 22 are laid and leveled successively. In this process, one end of the inclined rod 62 is fixedly connected to one end of the support pile 61. The inclined rod 62 can be made of steel plates, steel bars, etc., and the drainage pipe 4, transition rod 6 and permeable geotextile layer 5 are constructed at the same time. The inclination of the drainage pipe 4 can be adaptively set according to the construction site.

[0054] Finally, the gravel cushion layer 31 , the improved layer 32 and the concrete layer 33 are laid in sequence.

[0055] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. Soft soil roadbed reinforcement structure for municipal road engineering, characterized by: The invention comprises a bottom layer (1), a drainage layer (2) laid on the bottom layer (1), and a surface layer (3) laid on the drainage layer (2), wherein a plurality of drainage pipes (4) are laid at intervals in the drainage layer (2) along the extension direction of the road, the drainage pipes (4) extend along the width direction of the road, and at least one end is connected to the municipal drainage system, the drainage pipes (4) are provided with a plurality of seepage holes (41) at intervals on the upper side of the surface layer (3), and the plurality of drainage pipes (4) are located at different heights; A permeable geotextile layer (5) is laid on the upper side of the drainage pipe (4) close to the surface layer (3), and the permeable geotextile layer (5) covers the seepage holes (41); Two adjacent drainage pipes (4) located at different heights are simultaneously connected to at least one transition rod (6); The bottom layer (1) comprises a base layer (11), an impermeable geotextile layer (12) laid on the base layer (11), and a fine stone layer (13) laid on the impermeable geotextile layer (12), and the drainage layer (2) is laid on the fine stone layer (13).

2. The soft soil roadbed reinforcement structure for municipal road engineering according to claim 1 is characterized in that: A plurality of support piles (61) whose lower ends extend into the bottom layer (1) are fixed to the lower end of each of the drainage pipes (4), and the plurality of support piles (61) are arranged at intervals along the length direction of the drainage pipe (4).

3. The soft soil roadbed reinforcement structure for municipal road engineering according to claim 2 is characterized in that: A plurality of transition bars (6) are arranged at intervals, and adjacent transition bars (6) and support piles (61) are simultaneously connected with inclined bars (62).

4. The soft soil roadbed reinforcement structure for municipal road engineering according to claim 1 is characterized in that: One transition rod (6) is provided and arranged along the length direction of the drainage pipe (4), and both ends of the drainage pipe (4) are respectively fixedly connected to the lower side of the drainage pipe (4).

5. The soft soil roadbed reinforcement structure for municipal road engineering according to any one of claims 1 to 4, characterized in that: The drainage layer (2) comprises a clay layer (21) laid on a fine stone layer (13) and a coarse stone layer (22) laid on the clay layer (21), and the drainage pipe (4) is arranged in the coarse stone layer (22).

6. The soft soil roadbed reinforcement structure for municipal road engineering according to any one of claims 1 to 4, characterized in that: The surface layer (3) comprises a gravel cushion layer (31) laid on the drainage layer (2), an improved layer (32) laid on the gravel cushion layer (31), and a concrete layer (33) laid on the improved layer (32).

7. The soft soil roadbed reinforcement structure for municipal road engineering according to any one of claims 1 to 4, characterized in that: Guard walls (7) are fixed to both sides of the drainage layer (2) and the surface layer (3), and the guard walls (7) are fixed to the upper side of the bottom layer (1).

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