Drainage method for high piled square soil field

Abstract

This invention provides a drainage method for high-level earthwork dumps, which has the following beneficial technical effects: it organically combines platform drainage, slope top interception, slope surface diversion, and comprehensive seepage prevention to form a multi-layered, three-dimensional, and highly efficient drainage and seepage prevention system. This overcomes the limitations of single measures, effectively removes water accumulated on the top of the earthwork dump, prevents rainwater infiltration, and prevents earthwork collapse caused by reduced earthwork friction, thus preventing safety accidents. It can quickly guide surface runoff away from dangerous areas and fundamentally cut off the main path of rainwater infiltration, effectively maintaining the shear strength of the soil and significantly reducing the risk of instability. The specific implementation methods in each step (such as the construction of intercepting ditches and the setting of drainage pipes) can be flexibly adjusted according to site conditions, making it economical, practical, and easy to promote in various projects. The construction steps are clear, the materials used are common, the process requirements are simple, and it is easy to implement on-site and control quality.

Description

Technical Field

[0001] This invention relates to the field of drainage technology for elevated earthwork sites in building construction, and more specifically, to a drainage method for elevated earthwork sites. Background Technology

[0002] Municipal engineering projects (such as urban roads, integrated utility tunnels, and linear infrastructure like rail transit) are typically characterized by long routes, wide construction areas, and massive earthwork excavation. Due to the constraints of limited urban land, these projects often face the problem of scarce construction land resources, resulting in extremely limited sites for temporary earthwork stockpiling—especially in urban core areas or areas with insufficient surrounding amenities, where the selection and area control of earthwork stockpiling sites are even more stringent.

[0003] In situations where "earthwork excavation-fill balance" (i.e., the volume of excavated earthwork is roughly equal to the volume of backfill earthwork, requiring no additional stockpiling or transportation) cannot be achieved, how to efficiently and safely temporarily stockpile large quantities of excavated earthwork becomes a key challenge restricting project progress and on-site management. To address the issue of insufficient space, engineering practice often employs increasing the height of earthwork stockpiles, thereby reducing the land area occupied by the stockpiles by increasing the amount of earthwork stockpiled per unit area. However, these high-stocked earthwork sites are mostly located in outdoor open environments, and their stability is highly susceptible to rainfall, especially heavy rainfall during the flood season. On the one hand, rainwater accumulates naturally on the slope top or seeps into the soil through surface runoff, leading to a significant increase in soil moisture content. When the soil is saturated with water, the effective stress between soil particles decreases, and the frictional resistance and cohesion weaken significantly. On the other hand, the slopes of high-fill soil dumps are usually steep. Under the combined effects of increased moisture content and decreased shear strength, the soil is prone to a chain reaction of local slippage → gradual collapse → overall instability. This can result in minor incidents such as soil collapse burying construction access roads and damaging surrounding temporary facilities, or even serious accidents such as casualties or equipment damage.

[0004] Existing drainage measures for high-fill soil dumps have limitations: traditional methods rely solely on drainage ditches at the toe of the slope or simply covering the site with plastic film. These solutions fail to effectively address the core issues of water seepage at the slope crest leading to increased soil moisture content, decreased shear strength, and heightened landslide risk. In particular, the risk of soil dump instability increases significantly under conditions of continuous rainfall or torrential rain. Summary of the Invention

[0005] In view of this, the present invention proposes a drainage method for high-fill soil dumps, comprising: Earthwork filling and platform formation: Earthwork is filled and compacted in layers according to design requirements. A platform for graded sloping is left at a preset elevation, and the top surface of the platform is trimmed to a drainage slope that is higher on the inside and lower on the outside. Slope seepage prevention covering: After the soil is backfilled and compacted, each slope is fully covered with a rainproof tarpaulin; Construction of the slope top drainage system: The top surface of the soil field is leveled and compacted into a plane with an outward drainage slope, and a surrounding intercepting ditch is excavated along its edge; Construction of the slope drainage system: Multiple drainage pipes are installed vertically along the slope, with the upper end of the drainage pipes connected to the intercepting ditch at the top of the slope and the lower end extending to the bottom plane of the soil field.

[0006] Furthermore, the drainage slope of the platform is not less than 2%.

[0007] Furthermore, when laying the rainproof tarpaulin, the overlap width of adjacent tarpaulins shall not be less than 200mm, and the overlap shall be sealed. At the same time, anchors or weights shall be used to fix the edges of the tarpaulin.

[0008] Furthermore, the drainage slope of the top plane of the soil field is not less than 1%.

[0009] Furthermore, the slope top interceptor can be constructed by any of the following methods: lining the excavated trench with an impermeable geomembrane, or using sprayed concrete to form a lining, or laying a precast drainage ditch.

[0010] Furthermore, the drain pipe is a PVC drain pipe.

[0011] Furthermore, the number, spacing, and diameter of the drainage pipes are determined based on the local rainfall intensity, catchment area, and slope length.

[0012] Furthermore, the connection between the drainage pipe and the intercepting ditch at the top of the slope is sealed to prevent seepage.

[0013] Furthermore, the drainage pipe is constructed by either brick-built drainage ditch or excavated drainage ditch with a sprayed concrete surface.

[0014] The present invention provides a drainage method for high-level earthwork dumps, which has the following advantages: it organically combines platform drainage, slope top interception, slope surface diversion, and comprehensive seepage prevention to form a multi-layered, three-dimensional, and highly efficient drainage and seepage prevention system. This overcomes the limitations of single measures, effectively removes water accumulation on the top of the earthwork dump, prevents rainwater infiltration, and prevents earthwork collapse caused by reduced earthwork friction, thus avoiding safety accidents. It can quickly guide surface runoff away from dangerous areas and fundamentally cut off the main path of rainwater infiltration, effectively maintaining the shear strength of the soil and significantly reducing the risk of instability. The specific implementation methods in each step (such as the construction of intercepting ditches and the setting of drainage pipes) can be flexibly adjusted according to site conditions, making it economical, practical, and easy to promote in various projects. The construction steps are clear, the materials used are common, the process requirements are simple, and it is easy to implement on-site and control quality. Attached Figure Description

[0015] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1 A flowchart illustrating the drainage method steps provided in an embodiment of the present invention; Figure 2 This is a schematic front view of the layout of the high-fill soil dump construction measures provided in an embodiment of the present invention; Figure 3 A top view illustrating the layout of the high-fill earthwork site construction measures provided in this embodiment of the invention; Figure 4 Provided for embodiments of the present invention Figure 1 Enlarged structural diagram of sample 1; In the diagram, 1. Top plane of the earthwork site, 2. Slope top intercepting ditch, 3. PVC drainage pipe, 4. Rainproof tarpaulin, 5. Bottom plane of the earthwork site, 6. Platform. Detailed Implementation

[0016] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0017] See Figure 1-4 As shown, this is a drainage method for a high-fill soil dump provided by an embodiment of the present invention, comprising: S01. Earthwork Filling and Platform Formation: Earthwork is filled and compacted in layers according to design requirements. A graded slope platform 6 is placed at the pre-set elevation, as per design specifications. Figure 1-2 As shown, the top surface of the platform 6 is modified to have a drainage slope that is higher on the inside and lower on the outside; S02. Slope seepage prevention covering: After the soil filling and compaction are completed, use rainproof tarpaulin 4, referring to... Figure 1-2 As shown, each slope surface is fully covered; S03. Construction of the slope top drainage system: Level and compact the top surface 1 of the excavation site into a plane with an outward drainage slope, and excavate a surrounding intercepting ditch 2 along its edge, referring to... Figure 1-3 As shown; S04. Construction of slope drainage system: Multiple drainage pipes are installed vertically along the slope. In this embodiment, PVC drainage pipe 3 is selected, so that the upper end of the PVC drainage pipe 3 is connected to the slope top intercepting ditch 2, and the lower end extends to the bottom plane 5 of the soil field.

[0018] In this embodiment, the drainage slope of the platform 6 is not less than 2%.

[0019] In this embodiment, when laying the rainproof tarpaulin, the overlap width of adjacent rainproof tarpaulins is not less than 200mm, and the overlap is sealed. At the same time, anchors or weights are used to fix the edges of the tarpaulin.

[0020] In this embodiment, the drainage slope of the top plane of the soil field is not less than 1%.

[0021] In this embodiment, the slope top interceptor can be constructed in any of the following ways: lining the excavated trench with an impermeable geomembrane, or using sprayed concrete to form a lining, or laying a prefabricated drainage ditch.

[0022] In this embodiment, the drain pipe is a PVC drain pipe.

[0023] In this embodiment, the number, spacing, and diameter of the drainage pipes are determined based on the local rainfall intensity, catchment area, and slope length.

[0024] In this embodiment, the connection between the drainage pipe and the intercepting ditch at the top of the slope is sealed to prevent seepage.

[0025] In this embodiment, the drainage pipe is constructed in any of the following ways: brick-built drainage ditch or excavated drainage ditch with a concrete sprayed surface.

[0026] This invention provides a drainage method for high-level earthwork dumps, which has the following beneficial technical effects: It organically combines platform drainage, slope top interception, slope surface diversion, and comprehensive seepage prevention to form a multi-layered, three-dimensional, and highly efficient drainage and seepage prevention system. This overcomes the limitations of single measures, effectively removes water accumulated on the top of the earthwork dump, prevents rainwater infiltration, and prevents earthwork collapse caused by reduced earthwork friction, thus preventing safety accidents. It can quickly guide surface runoff away from dangerous areas and fundamentally cut off the main path of rainwater infiltration, effectively maintaining the shear strength of the soil and significantly reducing the risk of instability. The specific implementation methods in each step (such as the construction of intercepting ditches and the setting of drainage pipes) can be flexibly adjusted according to site conditions, making it economical, practical, and easy to promote in various projects. The construction steps are clear, the materials used are common, the process requirements are simple, and it is easy to implement on-site and control quality.

[0027] It should be noted that in the description of this invention, the terms "upper", "lower", "left", "right", "inner", "outer", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is only for the convenience of description and is not intended to indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this invention.

[0028] Furthermore, it should be noted that, in the description of this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] Obviously, those skilled in the art can make various modifications and variations to this invention without departing from its spirit and scope. Therefore, if these modifications and variations fall within the scope of the claims of this invention and their equivalents, this invention also intends to include these modifications and variations.

Claims

1. A drainage method for a high-fill soil dump, characterized in that, include: Earthwork filling and platform formation: Earthwork is filled and compacted in layers according to design requirements. A platform for graded sloping is left at a preset elevation, and the top surface of the platform is trimmed to a drainage slope that is higher on the inside and lower on the outside. Slope seepage prevention covering: After the soil is backfilled and compacted, each slope is fully covered with a rainproof tarpaulin; Construction of the slope top drainage system: The top surface of the soil field is leveled and compacted into a plane with an outward drainage slope, and a surrounding intercepting ditch is excavated along its edge; Construction of the slope drainage system: Multiple drainage pipes are installed vertically along the slope, with the upper end of the drainage pipes connected to the intercepting ditch at the top of the slope and the lower end extending to the bottom plane of the soil field.

2. The drainage method for a high-fill soil dump according to claim 1, characterized in that, The drainage slope of the platform is not less than 2%.

3. The drainage method for a high-fill soil dump according to claim 1, characterized in that, When laying the rainproof tarpaulin, the overlap width between adjacent tarpaulins shall not be less than 200mm, and the overlap shall be sealed. At the same time, anchors or weights shall be used to fix the edges of the tarpaulin.

4. The drainage method for a high-fill soil dump according to claim 1, characterized in that, The drainage slope of the top plane of the soil yard shall not be less than 1%.

5. The drainage method for a high-fill soil dump according to claim 1, characterized in that, The slope top interceptor can be constructed by any of the following methods: lining the excavated trench with an impermeable geomembrane, or using sprayed concrete to form a lining, or laying a precast drainage ditch.

6. The drainage method for a high-fill soil dump according to claim 1, characterized in that, The drainage pipe is a PVC drainage pipe.

7. The drainage method for a high-fill soil dump according to claim 1, characterized in that, The number, spacing, and diameter of the drainage pipes are determined based on the local rainfall intensity, catchment area, and slope length.

8. The drainage method for a high-fill soil dump according to claim 1, characterized in that, The connection between the drainage pipe and the intercepting ditch at the top of the slope is sealed to prevent seepage.

9. The drainage method for a high-fill soil dump according to claim 1, characterized in that, The drainage pipe is constructed in any of the following ways: by brick-built drainage ditch or by excavating a drainage ditch and spraying concrete onto the surface.

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