Foam light soil vertical filling roadbed prefabricated block panel drainage structure

Abstract

The utility model discloses a kind of foam light soil vertical filling roadbed prefabricated block panel drainage structure, including the transverse water collector and vertical drain pipe between the protection wall and foam light soil roadbed, transverse water collector and vertical drain pipe form cross shape and connect, bottom extends and accesses bottom broken stone cushion layer, the bottom of broken stone cushion layer is also equipped with horizontal drain pipe, and horizontal drain pipe one end penetrates to the outside of protection wall.In construction process or after construction is completed, rainwater, pavement water, surrounding surface water and groundwater can be collected by transverse water collector and flow to vertical drain pipe, vertical drain pipe directs it downward to broken stone cushion layer, then is discharged by horizontal drain pipe.Therefore, by the drainage structure, the water can be discharged between protection wall and foam light soil roadbed, avoid to form side pressure and water exosmosis to form crystallization pollution plate surface to protection wall, both increase the security of protection wall and improve aesthetic property.

Description

Technical Field

[0001] This utility model relates to the field of roadbed drainage structure technology, specifically to a drainage structure for precast block panels in vertical filling roadbeds with foamed lightweight soil. Background Technology

[0002] Foamed lightweight soil, also known as aerated lightweight soil or foamed concrete, is a lightweight material made by physically mixing foaming agents to form foam clusters with cement, water, admixtures, and additives in a certain proportion, then pouring and molding it. After hardening, it contains a large number of pores and is characterized by its light weight, high compressive strength, and small self-compression deformation. It is mainly used in road reconstruction and expansion, bridge and culvert abutment backfilling, steep slope roadbeds, underground structure load reduction, soft soil roadbed load reduction, and various void backfilling scenarios to solve roadbed settlement, stability, and narrow space backfilling problems.

[0003] Because foamed lightweight soil is a lightweight and porous material, direct exposure to air and external environmental factors such as rain, ultraviolet radiation, and freeze-thaw cycles can lead to weathering and carbonization, resulting in cracking and reduced strength. Therefore, when vertically filling foamed lightweight soil subgrades, a protective wall needs to be installed on the outside to isolate the foamed lightweight soil from the external environment.

[0004] However, during or after the construction of foamed lightweight soil, surface water, surrounding surface water, and groundwater can infiltrate into the interior of the foamed lightweight soil subgrade and the gaps in the protective wall panels, leading to two hazards: (1) Water behind the protective wall cannot be drained, creating lateral water pressure that squeezes the protective wall, easily causing lateral collapse and damage. (2) If it is a protective wall with precast panels, water contained in the foamed lightweight soil seeps out through the gaps in the panels, and the calcium oxide and other components carried by the seeping water crystallize into calcium carbonate on the outside of the panels, forming white water stains that affect the aesthetics of the facade. Therefore, further improvements can be made. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model provides a precast block panel drainage structure for vertical filling of foamed lightweight soil roadbed, so as to solve the problems in the prior art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A precast block panel drainage structure for vertically filled foamed lightweight soil roadbed includes a foamed lightweight soil roadbed, protective walls built on both sides of the foamed lightweight soil roadbed, and a crushed stone cushion layer laid at the bottom of the foamed lightweight soil roadbed. A transverse water collection pipe and a vertical drainage pipe are installed between the protective walls and the foamed lightweight soil roadbed. The vertical drainage pipe is installed at intervals before the foamed lightweight soil roadbed is poured, and its bottom extends into the bottom crushed stone cushion layer. The transverse water collection pipe is installed in layers during the layered pouring of the foamed lightweight soil roadbed, and is always placed at the top of each layer. The transverse water collection pipe and the vertical drainage pipe are connected in a cross shape, and both are wrapped with permeable geotextile. A horizontal drainage pipe is also installed at the bottom of the crushed stone cushion layer, and one end of the horizontal drainage pipe extends to the outside of the protective wall.

[0007] By adopting the above technical solution, during or after construction, rainwater, road surface water, surrounding surface water, and groundwater can be collected through horizontal drainage pipes and flow to vertical drainage pipes. The vertical drainage pipes then guide the water downwards to the crushed stone subbase, and finally discharge it through horizontal drainage pipes. Therefore, this drainage structure can drain water accumulated between the protective wall and the foamed lightweight soil subgrade, avoiding lateral pressure on the protective wall and preventing water seepage that could crystallize and contaminate the surface. This increases the safety of the protective wall and improves its aesthetics.

[0008] Optionally, the spacing between the vertical drainage pipes is 2m to 4m.

[0009] Optionally, the spacing between the transverse water collection pipes is 1.5m to 3m.

[0010] Optionally, the transverse water collection pipe is provided at both the top and bottom positions between the protective wall and the foamed lightweight soil subgrade.

[0011] By adopting the above technical solution, since there is a horizontal water collection pipe at both the bottom and the top, the drainage performance can be further guaranteed throughout the entire process before, during and after construction.

[0012] Optionally, the bottom of the protective wall is precast with a concrete foundation, the top of the concrete foundation is reserved with an installation groove, the bottom of the protective wall is inserted into the installation groove and fixed by pouring and filling with cement mortar; one end of the horizontal drainage pipe passes through the concrete foundation and extends to the outside of the protective wall.

[0013] By adopting the above technical solution, and by pre-casting a concrete foundation and reserving installation slots for the positioning and fixing of the protective wall, the installation of the protective wall can be facilitated, and the overall stability of the installation structure can be improved.

[0014] Optionally, the horizontal water collection pipe and the vertical drain pipe may be circular or semi-circular.

[0015] Optionally, the diameter of the horizontal water collection pipe and the vertical drainage pipe is selected to be 5cm~15cm.

[0016] Optionally, the horizontal water collection pipe and the vertical drainage pipe are made of rigid permeable pipe, flexible permeable pipe or PVC pipe.

[0017] Compared with existing technologies, the beneficial effects of this utility model are as follows: 1. During or after construction, rainwater, road surface water, surrounding surface water, and groundwater can be collected through horizontal drainage pipes and flow to vertical drainage pipes. The vertical drainage pipes then guide the water downwards to the crushed stone subbase, and finally discharge it through horizontal drainage pipes. Therefore, this drainage structure can remove water accumulated between the protective wall and the foamed lightweight soil subgrade, preventing lateral pressure on the protective wall and preventing water seepage from crystallizing and contaminating the surface. This increases the safety of the protective wall and improves its aesthetics. 2. Since there is a horizontal water collection pipe at both the bottom and the top, the drainage performance can be further guaranteed throughout the entire process before, during and after construction. 3. By pre-casting a concrete foundation and reserving installation slots for the positioning and fixing of the protective wall, the installation of the protective wall can be facilitated and the overall stability of the installation structure can be improved. Attached Figure Description

[0018] Figure 1 This is a side sectional view of a precast block panel drainage structure for vertical filling of foamed lightweight soil subgrade according to this application; Figure 2 This is an inner elevation view of a precast block panel drainage structure for vertical filling of foamed lightweight soil roadbed according to this application. In the diagram: 1. Foamed lightweight soil subgrade; 2. Protective wall; 3. Crushed stone cushion layer; 4. Horizontal water collection pipe; 5. Vertical drainage pipe; 6. Horizontal drainage pipe; 7. Concrete foundation; 8. Installation groove; 9. Cement mortar. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0020] like Figures 1 to 2As shown, the present invention provides a precast block panel drainage structure for vertically filled foamed lightweight soil roadbed, including a foamed lightweight soil roadbed 1, protective walls 2 built on both sides of the foamed lightweight soil roadbed 1, and a crushed stone cushion layer 3 laid at the bottom of the foamed lightweight soil roadbed 1. In this embodiment, the protective wall 2 is the protective wall 2 of the precast panel.

[0021] Among them, a horizontal water collection pipe 4 and a vertical drainage pipe 5 are installed between the protective wall 2 and the foamed lightweight soil subgrade 1. The vertical drainage pipe 5 is installed at intervals before the foamed lightweight soil subgrade 1 is poured, and its bottom extends to connect to the bottom crushed stone cushion layer 3. The horizontal water collection pipe 4 is installed in layers during the layered pouring of the foamed lightweight soil subgrade 1, and is always placed at the top of the poured layer. The horizontal water collection pipe 4 and the vertical drainage pipe 5 are connected in a cross shape, and the horizontal water collection pipe 4 and the vertical drainage pipe 5 are wrapped with permeable geotextile. A horizontal drainage pipe 6 is also installed at the bottom of the crushed stone cushion layer 3, and one end of the horizontal drainage pipe 6 extends to the outside of the protective wall 2.

[0022] During or after construction, rainwater, road surface water, surrounding surface water, and groundwater can be collected through the horizontal drainage pipe 4 and flow to the vertical drainage pipe 5. The vertical drainage pipe 5 leads the water downwards to the crushed stone subbase 3, and then discharges it through the horizontal drainage pipe 6. Therefore, this drainage structure can drain the water accumulated between the protective wall 2 and the foamed lightweight soil subgrade 1, avoiding lateral pressure on the protective wall 2 and preventing water seepage from forming crystals that contaminate the surface. This increases the safety of the protective wall 2 and improves its aesthetics.

[0023] In this embodiment, the spacing between the vertical drainage pipes 5 is 2m to 4m, and their positions are adjusted appropriately at the panel expansion joints. The spacing between the horizontal water collection pipes 4 is 1.5m to 3m, and one horizontal water collection pipe 4 is installed at the top and bottom of the protective wall 2 and the foamed lightweight soil subgrade 1.

[0024] Specifically, the horizontal water collection pipe 4 and the vertical drain pipe 5 can be circular or semi-circular, with a diameter of 5cm to 15cm, and are made of rigid permeable pipe, flexible permeable pipe, PVC pipe, etc. In this embodiment, preferably, the horizontal water collection pipe 4 and the vertical drain pipe 5 are circular and are rigid permeable pipes.

[0025] In this embodiment, the permeable geotextile wrapped around the horizontal water collection pipe 4 and the vertical drainage pipe 5 is two layers. In other embodiments, it can be one layer, three layers, etc.

[0026] In this embodiment, a concrete foundation 7 is pre-cast at the bottom of the protective wall 2, and an installation groove 8 is reserved at the top of the concrete foundation 7. The bottom of the protective wall is inserted into the installation groove 8 and fixed by pouring and filling with cement mortar 9. Correspondingly, one end of the horizontal drainage pipe 6 passes through the concrete foundation 7 and extends to the outside of the protective wall 2. This design and installation method, by pre-casting the concrete foundation 7 and reserving the installation groove 8 for the positioning and fixing of the protective wall 2, not only facilitates the installation of the protective wall 2, but also improves the overall stability of its installation structure.

[0027] The implementation principle of the precast block panel drainage structure for vertically filled foamed lightweight soil roadbed in this application embodiment is as follows: By installing a horizontal water collection pipe 4 and a vertical drainage pipe 5 between the protective wall 2 and the foamed lightweight soil roadbed 1, rainwater, road surface water, surrounding surface water, and groundwater can be collected through the horizontal water collection pipe 4 and flow to the vertical drainage pipe 5 during or after construction. The vertical drainage pipe 5 then guides the water downwards to the crushed stone cushion layer 3 and finally discharges it through the horizontal drainage pipe 6. Therefore, this drainage structure can drain the water accumulated between the protective wall 2 and the foamed lightweight soil roadbed 1, avoiding lateral pressure on the protective wall 2 and preventing water seepage from forming crystals that contaminate the panel surface, thus increasing the safety of the protective wall 2 and improving its aesthetics.

[0028] The foregoing description of specific exemplary embodiments of the present invention is for illustrative and explanatory purposes. These descriptions are not intended to limit the present invention to the precise forms disclosed, and it is obvious that many changes and variations can be made based on the above teachings. Although embodiments of the present invention have been shown and described, these specific embodiments are merely explanations of the present invention and are not intended to limit the invention. The specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. The purpose of selecting and describing exemplary embodiments is to explain the specific principles of the present invention and its practical application, so that those skilled in the art, after reading this specification, can make modifications, substitutions, variations, and various choices and changes to the embodiments as needed without departing from the principles and spirit of the present invention, provided that such modifications, substitutions, variations, and choices and changes are within the scope of the claims of the present invention and are protected by patent law.

Claims

1. A precast block panel drainage structure for vertically filled foamed lightweight soil roadbed, characterized in that: The system includes a foamed lightweight soil subgrade (1), protective walls (2) built on both sides of the foamed lightweight soil subgrade (1), and a crushed stone cushion layer (3) laid at the bottom of the foamed lightweight soil subgrade (1); a horizontal water collection pipe (4) and a vertical drainage pipe (5) are installed between the protective wall (2) and the foamed lightweight soil subgrade (1). The vertical drainage pipe (5) is installed at intervals before the foamed lightweight soil subgrade (1) is poured, and its bottom extends into the bottom crushed stone cushion layer (3); The horizontal water collection pipe (4) is installed in layers during the layered pouring of the foamed lightweight soil subgrade (1), and is placed at the top of each pouring layer; the horizontal water collection pipe (4) and the vertical drainage pipe (5) are connected in a cross shape, and the horizontal water collection pipe (4) and the vertical drainage pipe (5) are wrapped with permeable geotextile; a horizontal drainage pipe (6) is also installed at the bottom of the crushed stone cushion layer (3), and one end of the horizontal drainage pipe (6) extends to the outside of the protective wall (2).

2. The precast block panel drainage structure for vertical filling of foamed lightweight soil subgrade according to claim 1, characterized in that: The spacing between the vertical drainage pipes (5) is 2m to 4m.

3. The precast block panel drainage structure for vertical filling of foamed lightweight soil subgrade according to claim 1, characterized in that: The spacing between the horizontal water collection pipes (4) is 1.5m to 3m.

4. The precast block panel drainage structure for vertical filling of foamed lightweight soil subgrade according to claim 1, characterized in that: The transverse water collection pipe (4) is installed at both the top and bottom of the protective wall (2) and the foamed lightweight soil subgrade (1).

5. The precast block panel drainage structure for vertical filling of foamed lightweight soil subgrade according to claim 1, characterized in that: The bottom of the protective wall (2) is precast with a concrete foundation (7), and the top of the concrete foundation (7) is reserved with an installation slot (8). The bottom of the protective wall (2) is inserted into the installation slot (8) and fixed by pouring and filling with cement mortar (9). One end of the horizontal drainage pipe (6) passes through the concrete foundation (7) and extends to the outside of the protective wall (2).

6. The precast block panel drainage structure for vertical filling of foamed lightweight soil subgrade according to claim 1, characterized in that: The horizontal water collection pipe (4) and the vertical drain pipe (5) can be circular or semi-circular.

7. The precast block panel drainage structure for vertical filling of foamed lightweight soil subgrade according to claim 1, characterized in that: The diameters of the horizontal water collection pipe (4) and the vertical drainage pipe (5) are selected to be 5cm-15cm.

8. The precast block panel drainage structure for vertical filling of foamed lightweight soil subgrade according to claim 1, characterized in that: The horizontal water collection pipe (4) and the vertical drainage pipe (5) are made of rigid permeable pipe, flexible permeable pipe or PVC pipe.

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