A drainage ditch for coping with uneven settlement of a landfill site

Abstract

A drainage ditch for coping with uneven settlement of a landfill site, comprising a slope-shaped landfill site, a footpath located on the upper part and the lower part of the slope of the landfill site, a water intercepting ditch arranged along the footpath, a rapids chute located on the slope, the rapids chute being connected with the water intercepting ditches on the upper part and the lower part of the slope or being connected with the water intercepting ditches through the drainage ditch, and a water collecting ditch buffer platform being arranged between the connected water intercepting ditches or drainage ditch and the rapids chute and being connected with the two; the water collecting ditch buffer platform is composed of a water ditch main body and a grating ditch cover plate covering the mouth of the water ditch main body; one side of the water ditch main body is connected with the water intercepting ditches or the drainage ditch, and the other side is connected with the rapids chute; the rapids chute comprises an upper section rapids chute located on the upper part of the slope and climbing along the slope and a lower section rapids chute located on the lower part of the slope and climbing along the slope, and the two rapids chutes are connected and communicated at the waist of the slope to form a zigzag buffer flow chute structure. The present application can cope with uneven settlement of 30 cm / a level (30 cm / a level means 30 cm per year settlement).

Description

Technical Field

[0001] The present invention provides a drainage ditch for coping with uneven settlement of a landfill. The present invention is applied to landscape reuse projects after ecological restoration of closed landfills. More specifically, it relates to a rapid flow trough construction method for a drainage system in the reuse project, belonging to the technical field of landscape drainage facilities. Background Art

[0002] Landfill ecological restoration projects have gained popularity in recent years. Rapid chutes are drainage systems installed within landfills to quickly channel rainwater away from the pile. Their primary function is to prevent landslides and instability caused by rainwater accumulation, as well as potential pollution risks from rainwater seepage into the landfill. Currently, drainage ditches in landfills are primarily designed for operational and maintenance purposes. These ditches have limited ability to cope with unstable settlement, resulting in high maintenance costs and unsuitable for landscape reuse following ecological restoration.

[0003] As urban development shifts from incremental to stock-based development, urban construction land is becoming increasingly scarce, raising concerns about the potential value of brownfield landfills. Most landfills can achieve medium-intensity utilization after ecological restoration. The transformation of landfill ecological restoration into parkland has become a hot topic in current practice and holds significant significance for sustainable urban development. Due to the complexity, dynamism, and long-term nature of landfill pollution, most current remediation efforts struggle to completely remove hazardous substances. Therefore, balancing environmental safety and reuse during reuse projects remains a key challenge.

[0004] The main problems in current practice are: high maintenance costs. Due to the continued existence of uneven settlement in landfills, the traditional rapid flow trough technology has weak resistance to settlement and is prone to cracking. Soil and debris are easily blocked and accumulated, resulting in high maintenance costs. Due to the transformation of spatial functions after reuse, the traditional rapid flow trough cannot adapt to the natural terrain after regeneration and has poor coordination with the surrounding landscape environment.

[0005] In response to the above problems, this invention improves the existing construction technology and proposes a new drainage construction method for ecological restoration of landfills into parks. Summary of the Invention

[0006] The present invention provides a drainage ditch for coping with uneven settlement of landfills, with the aim of solving the technical problems that uneven settlement of landfills persists, traditional rapid trough technology has weak resistance to settlement, is prone to cracking, is easily clogged and accumulated with soil and debris, and traditional rapid troughs cannot adapt to the natural terrain after regeneration.

[0007] The technical solutions of the present invention are as follows:

[0008] A drainage ditch for coping with uneven settlement of a landfill, comprising a sloped landfill 17, a walkway 15 located at the upper and lower parts of the landfill slope, an intercepting ditch 18 arranged along the walkway, and a rapids trough located on the slope, the rapids trough being connected to the intercepting ditch at the upper and lower parts of the slope, or connected to the intercepting ditch through a drainage ditch 16. The invention is characterized in that a water collection ditch buffer platform 11 is further provided between the connected intercepting ditch 18 or drainage ditch 16 and the rapids trough to connect the two; the water collection ditch buffer platform 11 is composed of a ditch body 14 and a grille ditch cover covering the ditch mouth; the ditch body 14 is connected to the intercepting ditch or the drainage ditch 16 on one side and to the rapids trough on the other side;

[0009] The rapid flow trough includes an upper rapid flow trough 12 located at the upper part of the hillside and crawling obliquely along the slope, and a lower rapid flow trough 13 located at the lower part of the hillside and crawling obliquely along the slope, and the two are connected on the hillside to form a zigzag buffer flow trough structure.

[0010] The upper rapid trough 12 and the lower rapid trough 13 are paved in accordance with the natural terrain and are lower than the slope of the hillside; a water-blocking pebble buffer zone ditch 1 is set along both sides of the rapid trough, and the pebble buffer zone ditch 1 is paved with pebbles to form filtering troughs on both sides of the rapid trough.

[0011] The drainage is diverted at the junction of the upper rapid flow trough 12 and the lower rapid flow trough 13; the upper rapid flow trough 12 is configured to be gradually thickened from top to bottom, and the lower rapid flow trough 13 is configured to be gradually thinned from top to bottom.

[0012] The rapid trough includes multiple sections of short-axis tiles 4, which are tiles with arc-shaped cross-sections; the rapid trough is composed of multiple sections of short-axis tiles 4 that are overlapped up and down the hillside, and the short-axis tiles at high places are overlapped on the short-axis tiles at low places.

[0013] The short-axis tiles 4 from top to bottom of the upper rapid flow trough 12 are of a shape that gradually becomes thicker; the short-axis tiles 4 from top to bottom of the lower rapid flow trough 13 are of a shape that gradually becomes thinner, and the upper and lower short-axis tiles 4 are overlapped and connected.

[0014] The arc span of each short-axis tile 4 from top to bottom in the upper rapid flow trough 12 gradually increases; the arc span of each short-axis tile 4 from top to bottom in the lower rapid flow trough 13 gradually decreases, and the upper and lower short-axis tiles 4 are overlapped and connected.

[0015] Each of the short-axis tiles 4 is embedded in the planting soil 2 on the hillside below its edge, and both sides of the short-axis tiles 4 are smoothly connected to the edge of the pebble buffer zone ditch 1. Each of the short-axis tiles is at the lower end along the hillside, and a water-retaining graded steel drop weir 3 is provided on the inner surface laterally, which forms a tile drainage trough 43 with the inner surface of the short-axis tile to control the drainage flow rate; at the intersection of the upper rapid trough 12 and the lower rapid trough 13, the overlapping short-axis tiles 42 at the intersection of the upper rapid trough are overlapped from the side on the intersection short-axis tiles 41 at the intersection of the lower rapid trough; the intersection short-axis tiles 41 of the lower rapid trough have a larger arc span than the overlapping short-axis tiles 42, and a five-level buffer weir 5 is provided in the intersection short-axis tile 41 to form a buffer zone; the five-level buffer weir 5 is five water retaining plates installed at intervals in the intersection short-axis tile 41.

[0016] A double-column support leg is set at the bottom of the short-axis tile; the double-column support leg includes two square steel support columns 6 connected and fixed to the bottom of the short-axis tile, and the two square steel support columns 6 are fixed horizontally side by side at the bottom of the short-axis tile, and the bottom foot portion is fixedly connected to the embedded part 8 by a welded angle steel connector 7, and the embedded part 8 and the concrete support 9 are cast into an integrated structure, and the concrete support 9 is supported on the environmental process covering layer 10 of the landfill at the bottom.

[0017] An independent concrete support 9 is provided at the bottom of each of the square steel support columns 6; and at least two pairs of double-column support structures are longitudinally provided at the bottom of the short-axis tile.

[0018] The technical solution features of the present invention are:

[0019] The invention discloses a drainage ditch for coping with uneven settlement of a garbage landfill, comprising three parts: a rapid flow trough connected to an intercepting ditch, a rapid flow trough flow structure, and a connection between rapid flow troughs.

[0020] (1) The rapids trough is connected to the intercepting ditch. In conjunction with the park-like rest nodes along the street, a buffer zone is set up where the rapids trough and the intercepting ditch are connected. Through coarse and fine gratings, debris is retained near the park path, making it easier to clean and maintain.

[0021] (2) Rapid trough flow structure. The rapid trough is controlled by multi-segment short-axis tiles. The aspect ratio of the tiles is controlled between 1:1 and 1:2, and the long side dimension is controlled within 1 meter to cope with the impact of unstable settlement of the landfill on the structure. The tiles adopt a double-column support structure to ensure the connectivity between the tiles and the ground, while reducing the lateral displacement and settlement of the tiles in the diagonal direction of drainage, controlling the settlement deformation in the direction of drainage overlap, and coping with the impact of uneven settlement of garbage on the entire rapid trough; at the same time, the short-axis tiles are made of weather-resistant steel to replace the existing concrete material with weather-resistant steel to improve the toughness of the structure.

[0022] (3) Intersection of rapid troughs. Considering that the rapid troughs turn with the terrain, a buffer zone is set up at the intersection. The buffer zone structure is composed of large-span arc steel and a five-level buffer weir 5 is set up. The five-level buffer weir 5 is five horizontally arranged water retaining plates installed at intervals in the lower section of the rapid trough at the intersection to ensure the water flow rate of the rapid trough, reduce the risk of water overflow, adapt to the terrain, and integrate into the landscape environment.

[0023] Effects of the Invention

[0024] The present invention can cope with uneven settlement of 30cm / a (30cm / a means 30 centimeters / year), is applicable to the moderate utilization and development standard of landfills, is easy to clean and maintain, conforms to the natural terrain, and is coordinated with the overall regeneration landscape of the landfill. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a schematic plan view of the overall structure of the present invention.

[0026] Figure 2 This is a three-dimensional schematic diagram of the overall structure of the present invention.

[0027] Figure 3 Schematic diagram of the interface structure of the water collection ditch buffer platform of the present invention

[0028] Figure 4 for Figure 1 The AA cross-sectional view of the rapid trough drainage structure of the present invention,

[0029] Figure 5 for Figure 1 The BB cross-sectional view of the rapid trough drainage structure of the present invention,

[0030] Figure 6 for Figure 1 An enlarged three-dimensional schematic diagram of the rapid flow trough structure a of the present invention;

[0031] Figure 7 for Figure 1 An enlarged three-dimensional schematic diagram of the junction structure b of the upper rapid flow trough and the lower rapid flow trough of the present invention;

[0032] Description of the accompanying figures:

[0033] Pebble buffer ditch 1, planting soil 2, graded waterfall steel weir 3, short-axis tile 4, intersecting short-axis tile 41, overlapping short-axis tile 42, tile drainage trough 43, five-level buffer weir 5, square steel support column 6, angle steel connector 7, embedded parts 8, concrete support 9, environmental process cover 10, water collection ditch buffer platform 11, upper rapids trough 12, lower rapids trough 13, ditch main body-14, ditch main body 14, walkway-15, drainage ditch-16, landfill 17, intercepting ditch 18. DETAILED DESCRIPTION

[0034] See also Figure 1-7 As shown, the present invention is a drainage ditch for coping with uneven settlement of a landfill, comprising a sloped landfill 17, a walkway 15 located at the upper and lower parts of the landfill slope, an intercepting ditch 18 arranged along the walkway, and a rapids trough located on the slope, wherein the rapids trough is connected to the intercepting ditch at the upper and lower parts of the slope, or is connected to the intercepting ditch through a drainage ditch 16. The invention is characterized in that a water collecting ditch buffer platform 11 is further provided between the connected intercepting ditch 18 or drainage ditch 16 and the rapids trough to connect the two; the water collecting ditch buffer platform 11 is composed of a ditch body 14 and a grille ditch cover covering the ditch mouth; the ditch body 14 is connected to the intercepting ditch or the drainage ditch 16 on one side and to the rapids trough on the other side;

[0035] See also Figure 1 、 2 As shown, the rapids trough includes an upper rapids trough 12 located at the upper part of the hillside and crawling obliquely along the slope, and a lower rapids trough 13 located at the lower part of the hillside and crawling obliquely along the slope, and the two are connected on the hillside to form a zigzag buffer trough structure.

[0036] The upper rapid trough 12 and the lower rapid trough 13 are laid in accordance with the natural terrain and are lower than the slope of the hillside; a water-blocking pebble buffer groove 1 is set along both sides of the rapid trough. The pebble buffer groove 1 is filled with pebbles to form a filter tank on both sides of the rapid trough. Figure 4 shown.

[0037] The drainage is diverted at the junction of the upper rapid flow trough 12 and the lower rapid flow trough 13; the upper rapid flow trough 12 is configured to be gradually thickened from top to bottom, and the lower rapid flow trough 13 is configured to be gradually thinned from top to bottom.

[0038] See also Figure 4 、 6 As shown, the rapid trough includes multiple sections of short-axis tiles 4, and the short-axis tiles 4 are tiles with arc-shaped cross-sections; the rapid trough is composed of multiple sections of the short-axis tiles 4 that are overlapped up and down the hillside, and the short-axis tiles at high places are overlapped on the short-axis tiles at low places.

[0039] See also Figure 1 As shown, the short-axis tiles 4 from top to bottom of the upper rapid flow trough 12 are of a shape gradually increasing from thin to thick; the short-axis tiles 4 from top to bottom of the lower rapid flow trough 13 are of a shape gradually increasing from thick to thin, and the upper and lower short-axis tiles 4 are overlapped and connected.

[0040] See also Figure 6As shown, the arc span of each short-axis tile 4 from top to bottom in the upper rapid flow trough 12 gradually increases; the arc span of each short-axis tile 4 from top to bottom in the lower rapid flow trough 13 gradually decreases, and the upper and lower short-axis tiles 4 are overlapped and connected.

[0041] See also Figure 4 As shown, the edges of each of the short-axis tiles 4 are embedded in the planting soil 2 on the hillside surface, and the two sides of the short-axis tiles 4 are smoothly connected with the edges of the pebble buffer zone ditch 1. At the lower end along the hillside, each of the short-axis tiles is provided with a water-retaining graded steel drop weir 3 along the inner surface along the horizontal direction, which forms a tile drainage trough 43 with the inner surface of the short-axis tile to control the drainage flow rate; at the intersection of the upper rapid trough 12 and the lower rapid trough 13, the overlapping short-axis tiles 42 at the intersection of the upper rapid trough are overlapped from the side on the intersection short-axis tiles 41 at the intersection of the lower rapid trough; the intersection short-axis tiles 41 of the lower rapid trough have a larger arc span than the overlapping short-axis tiles 42, and a five-level buffer weir 5 is provided in the intersection short-axis tile 41 to form a buffer zone; the five-level buffer weir 5 is five water retaining plates installed at intervals in the intersection short-axis tile 41.

[0042] See also Figure 4-7 As shown, a double-column support leg is provided at the bottom of the short-axis tile; the double-column support leg includes two square steel support columns 6 connected and fixed to the bottom of the short-axis tile, and the two square steel support columns 6 are fixed horizontally side by side at the bottom of the short-axis tile, and the bottom foot portion is fixedly connected to the embedded part 8 by a welded angle steel connector 7, and the embedded part 8 and the concrete support 9 are cast into an integrated structure, and the concrete support 9 is supported on the environmental process covering layer 10 of the landfill at the bottom.

[0043] An independent concrete support 9 is provided at the bottom of each of the square steel support columns 6; and at least two pairs of double-column support structures are longitudinally provided at the bottom of the short-axis tile.

[0044] Example

[0045] The structure of the embodiment of the present invention is shown in the figures, which will not be described in detail. The construction method of the present invention is as follows:

[0046] 1. Tamp the soil on top of the environmental process cover layer 10. Arrange the concrete supports 9 according to the project design and install the embedded parts 8 therein. The short-axis tiles 4 are directly welded to the embedded parts 8 in the concrete supports 9 using square steel support columns 6. Angle steel connectors 7 are used to secure the welds between the square steel support columns 6 and the embedded parts 8 to enhance weld stability.

[0047] 2. Short-axis tiles 4 are overlapped sequentially according to the design to form the surface layer of the rapid flow trough. A graded steel drop weir 3 is welded to the lower end of each short-axis tile 4. At the junction of the upper rapid flow trough 11 and the lower rapid flow trough 13, a connecting short-axis tile 41 is installed, with a five-level buffer weir 5 welded inside it.

[0048] 3. Pebbles of a certain thickness are laid on both sides of the short-axis tile 4 where it meets the planting soil 2 according to the engineering design to form a pebble buffer zone ditch 1.

[0049] The rapid trough of the present invention is controlled by multi-segment short-axis tiles, the aspect ratio of the tiles is controlled between 1:1 and 1:2, and the long side dimension is controlled within 1 meter to cope with the impact of unstable settlement of the landfill on the structure. The tiles adopt a double-column support structure to ensure the connectivity between the tiles and the ground, while reducing the lateral settlement of the tiles in the diagonal direction of drainage, and controlling the settlement deformation in the direction of drainage overlap to cope with the impact of uneven settlement of garbage on the rapid trough as a whole; at the same time, the short-axis tiles are made of weather-resistant steel materials to replace the existing concrete materials with weather-resistant steel materials to improve the toughness of the structure. The present invention can cope with uneven settlement of 30cm / a level (30cm / a level means 30 centimeters / year of settlement). The rapid trough of the present invention is connected to the rapid trough. Considering that the rapids trough turns with the terrain, a junction buffer zone is set up. The buffer zone structure is composed of large-span arc-shaped steel and a five-level buffer weir 5 is set up. The five-level buffer weir 5 is five water retaining plates installed at intervals in the lower section of the rapids trough at the junction to ensure the water flow rate of the rapids trough, reduce the risk of water overflow, adapt to the terrain, and integrate into the landscape environment.

[0050] Working principle of the present invention:

[0051] After the hillside landfill 17 is reclaimed as a park, rainwater flows from the intercepting ditch 18 through the drainage ditch 16 under the trail 15 and into the ditch buffer platform 11. The ditch buffer platform 11 in the present invention serves to collect, buffer, and filter water. The filtering function of the ditch buffer platform 11 allows most impurities in the rainwater to be filtered out on the flat roadside, facilitating subsequent maintenance.

[0052] 2. Rainwater is filtered through the ditch buffer platform 11 and enters the upper rapids trough 12. The rainwater flow rate is controlled by the graded drop steel weir 3 and the tile drainage trough 43, which changes from thin to thick. Among them, ① the tile drainage trough 43 is made of short-axis tiles 4, which can effectively deal with the impact of uneven settlement on large structures. ② The pebble buffer zone ditch 1 on both sides of the tile drainage trough 43 can effectively control the influx of impurities in the terrain rainwater, facilitating later maintenance.

[0053] 3. Rainwater flows through the thickest tile drainage trough 43 of the upper rapids trough 12 into the lower rapids trough 13 with the five-level buffer weir 5, achieving the target effect of water flow turning along with the landscape terrain at a controllable rainwater flow rate.

[0054] 4. The rainwater passes through the tile drainage groove 43 which changes from thick to thin in the lower rapids groove 13, so as to accelerate the flow of the latter half of the rainwater, reduce the impurities in the rainwater, and flow into the water collection ditch buffer platform 11, which is convenient for later maintenance.

Claims

1. A drainage ditch for coping with uneven settlement of a landfill, comprising a sloped landfill, a footpath located at the upper and lower parts of the landfill, an intercepting ditch arranged along the footpath, and a rapids trough located on the slope, the rapids trough being connected to the intercepting ditch at the upper and lower parts of the slope, or connected to the intercepting ditch through a drainage ditch, characterized in that: A water collecting ditch buffer platform (11) is provided between the connected intercepting ditch (18) or drainage ditch (16) and the rapid flow trough to connect the two; the water collecting ditch buffer platform (11) is composed of a ditch body (14) and a grid ditch cover covering the ditch mouth; one side of the ditch body (14) is connected to the intercepting ditch or the drainage ditch (16), and the other side is connected to the rapid flow trough; The rapid trough comprises an upper rapid trough (12) located at the upper part of the hillside and crawling obliquely along the slope, and a lower rapid trough (13) located at the lower part of the hillside and crawling obliquely along the slope, and the two are connected and connected on the hillside to form a "Z"-shaped buffer trough structure; the rapid trough is composed of multiple sections of short-axis tiles (4) overlapped along the hillside, and the short-axis tiles at the higher part overlap the short-axis tiles at the lower part; the lower end of each short-axis tile (4) is welded with a graded drop steel weir (3); A double-column support leg is provided at the bottom of the short-axis tile; the double-column support leg comprises two square steel support columns (6) connected and fixed to the bottom of the short-axis tile, the two square steel support columns (6) are fixed transversely side by side to the bottom of the short-axis tile, and the bottom foot thereof is fixedly connected to the embedded part (8) by welding an angle steel connector (7), the embedded part (8) and the concrete support (9) are cast into an integral structure, and the concrete support (9) is supported on the environmental process covering layer (10) of the landfill at the bottom.

2. A drainage ditch for coping with uneven settlement of a landfill as claimed in claim 1, characterized in that: The upper rapid trough (12) and the lower rapid trough (13) are laid in a creeping manner in accordance with the natural terrain and are lower than the slope of the hillside; a water-blocking pebble buffer zone (1) is arranged along both sides of the rapid trough, and the pebble buffer zone (1) is paved with pebbles to form filtering troughs on both sides of the rapid trough.

3. A drainage ditch for coping with uneven settlement of a landfill as claimed in claim 1 or 2, characterized in that: The drainage is diverted at the junction of the upper rapid flow trough (12) and the lower rapid flow trough (13); the upper rapid flow trough (12) is configured to be gradually thickened from top to bottom, and the lower rapid flow trough (13) is configured to be gradually thinned from top to bottom.

4. A drainage ditch for coping with uneven settlement of a landfill as claimed in claim 3, characterized in that: The rapid flow trough comprises multiple sections of short-axis tiles (4), and the short-axis tiles (4) are tiles with arc-shaped cross-sections.

5. A drainage ditch for coping with uneven settlement of a landfill as claimed in claim 4, characterized in that: The short-axis tiles (4) of the upper rapid flow trough (12) are shaped from thin to thick from top to bottom; the short-axis tiles (4) of the lower rapid flow trough (13) are shaped from thick to thin from top to bottom, and the upper and lower short-axis tiles (4) are overlapped and connected.

6. A drainage ditch for coping with uneven settlement of a landfill as claimed in claim 5, characterized in that: The arc span of each short-axis tile (4) from top to bottom of the upper rapid flow trough (12) gradually increases; the arc span of each short-axis tile (4) from top to bottom of the lower rapid flow trough (13) gradually decreases, and the upper and lower short-axis tiles (4) are overlapped and connected.

7. A drainage ditch for coping with uneven settlement of a landfill as claimed in claim 4, characterized in that: The edges of each short-axis tile (4) are embedded in the planting soil (2) on the slope surface, and the two sides of the short-axis tile (4) are smoothly connected with the edges of the pebble buffer zone groove (1). At the lower end along the slope, each short-axis tile is provided with a water-retaining graded drop steel weir (3) along the inner surface thereof, which forms a tile drainage groove (43) with the inner surface of the short-axis tile to control the drainage flow rate; at the junction of the upper rapids groove (12) and the lower rapids groove (13), The overlapping short-axis tiles (42) at the intersection of the upper rapid trough are overlapped on the intersecting short-axis tiles (41) at the intersection of the lower rapid trough from the side; the intersecting short-axis tiles (41) of the lower rapid trough have a larger arc span than the overlapping short-axis tiles (42), and a five-level buffer weir (5) is set in the intersecting short-axis tiles (41) to form a buffer zone; the five-level buffer weir (5) is five water retaining plates installed at intervals in the intersecting short-axis tiles (41) in a transverse direction.

8. The drainage ditch for coping with uneven settlement of a landfill as claimed in claim 1, characterized in that: An independent concrete support (9) is provided at the bottom of each square steel support column (6); and at least two pairs of double-column support legs are longitudinally provided at the bottom of the short-axis tile.

Images