Through-type ecological frame stepped revetment and construction method

Abstract

The present invention relates to a through-type ecological frame stepped revetment and construction method, comprising the steps of: base compaction; bottom drainage construction; revetment foot construction; revetment slope backfilling; ecological frame masonry below the water level; ecological frame masonry above the water level; top construction; riprap construction; vegetation planting. The beneficial effects of the present invention are: using a combined structure of revetment foot and riprap, using connecting bars to intersect horizontally and steel pipes to intersect vertically, and also improving the integrity of the revetment foot structure by post-casting concrete; forming a combined slope drainage pipe by drainage transverse pipes and drainage vertical pipes interconnected behind the slope, improving the drainage effect behind the slope; using a water collection tank as the bottom slope drainage hub, using the filtering structure of the water collection tank to achieve water purification, avoiding blockage of the revetment drainage system; filling the prefabricated block of the ecological frame above the water level with vegetation concrete, which is conducive to planting slope vegetation; filling sand and gravel below the water level to avoid water scouring.

Description

Technical Field

[0001] The invention belongs to the technical field of river bank ecological slope protection, and in particular relates to a through-type ecological frame stepped bank protection and a construction method. Background Art

[0002] At present, as the concept of low-carbon environmental protection has gradually become an important theme of urban planning, urban construction pays more attention to ecological protection and landscape features. Inland waterway protection projects have gradually shifted from traditional hard masonry protection to ecological structure forms. The application of ecological frames can meet the stability of bank protection and vegetation greening, but at present, there is no difference in the construction of ecological frames above and below the normal water level of the bank protection. Compared with the integral concrete masonry bank protection, the structural integrity of the ecological frame is poor, especially in the bottom and top areas of the structure, which are more susceptible to unstable factors such as water scouring and impact, resulting in bank protection damage. In addition, for ecological frame blocks, the drainage of the bank slope is not easy to arrange, which easily causes the soil behind the bank slope to be easily invaded by water and cause bank collapse. Therefore, it is necessary to seek an ecological bank protection structure and its construction method to make up for the above defects. Summary of the invention

[0003] The purpose of the present invention is to overcome the deficiencies in the prior art and provide a through-type ecological frame stepped revetment and a construction method.

[0004] The construction method of the through-type ecological frame stepped revetment comprises the following steps:

[0005] Step 1: Construction of water collecting tank: Construct the compacted soil layer, arrange the water collecting tank on the compacted soil layer after the designed position of the revetment slope, and extend the water collecting tank out of the revetment through the water collecting pipe;

[0006] Step 2: Construction of revetment foot: a steel pipe is placed on the compacted soil layer and a crushed stone cushion is constructed, a lower prefabricated block and an upper prefabricated block are installed to form a revetment foot, and a layer of prefabricated blocks is constructed on the revetment foot;

[0007] Step 3: Backfill behind the bank slope: Set backfill soil behind the prefabricated blocks and construct drainage pipes behind the slope simultaneously; construct a crushed stone layer between the backfill soil and the prefabricated blocks, and then lay a layer of prefabricated blocks; repeat step 3 until the normal water level is reached;

[0008] Step 4: Construction of ecological frame above the water level: Continue to construct precast blocks. After every two layers of precast blocks, construct a backfill soil and gravel layer, and fill the precast blocks above the normal water level with vegetation concrete.

[0009] Step 5: Top-pressing construction: Install prefabricated fixed blocks at the bank side of the backfill soil, support the top-pressing formwork and pour the top-pressing concrete;

[0010] Step 6: Stone riprap construction: construct a sand and gravel filling layer and prefabricated baffles on the outside of the revetment foot, and construct stone riprap between the prefabricated baffles and the lowest prefabricated blocks.

[0011] Preferably, a water inlet is provided on the top of the water collecting tank, a water outlet is provided on the bottom, a middle partition is provided inside the water collecting tank, the middle partition has water permeable holes, the upper part of the middle partition is filled with a filter sand layer, and a permeable geotextile is installed on the bottom of the filter sand layer; the back-slope drainage pipe includes a drainage horizontal pipe and a drainage vertical pipe, and the water in the drainage vertical pipe flows through the water collecting tank, passes through the filter sand layer, enters the water collecting pipe, and is drained out of the bank protection body through the water collecting pipe.

[0012] Preferably, in step 2, steel pipes are arranged at intervals on the compacted soil layer, fine sand is poured into the steel pipes, a gravel cushion layer is constructed on the compacted soil layer, the top of the steel pipe passes through the gravel cushion layer, and the lower prefabricated block and the upper prefabricated block are installed on the top of the gravel cushion layer, the lower prefabricated block has horizontal and vertical connecting holes, the upper prefabricated block is provided with horizontal connecting holes, the horizontal connecting holes of the lower prefabricated block and the upper prefabricated block are horizontally penetrated and penetrated with connecting ribs; the steel pipe passes through the vertical connecting hole of the lower prefabricated block, and a positioning rib is installed on the top of the steel pipe, and the upper part of the positioning rib extends out of the revetment pressure foot; a reserved groove is provided on the top of the lower prefabricated block, the top end of the steel pipe, the bottom end of the positioning rib and the connecting rib meet in the reserved groove of the lower prefabricated block, and post-cast concrete is constructed in the reserved groove.

[0013] Preferably, the prefabricated blocks of the bottom layer are limited by positioning ribs, the prefabricated blocks have through holes, the through holes of the prefabricated blocks in the same layer are continuously connected horizontally, and the prefabricated blocks below the normal water level are filled with sand and gravel.

[0014] Preferably, in step 4, a layer of geogrid is provided at the bottom of each layer of backfill soil above the normal water level, and the geogrid transversely penetrates the backfill soil, the crushed stone layer and the prefabricated blocks. The geogrid is fixed by driving fixing ribs between the crushed stone layer and the prefabricated blocks, and the top of the fixing ribs is connected with a fixing plate, which is pressed onto the geogrid, and the top of the fixing plate is pressed by the crushed stone layer and the prefabricated blocks.

[0015] Preferably, in step five, the bottom end of the prefabricated fixed block is extended into the backfill soil for fixation by anchoring bars, the top of the prefabricated block is provided with a groove, and a railing is installed in the groove; an anchoring vertical rod is driven between the uppermost prefabricated block and the gravel layer, an anchoring horizontal rod is connected with the anchoring vertical rod, and the outer side of the anchoring horizontal rod is connected to the top pressure formwork; at the same time, the outer bottom end of the top pressure formwork is fixed by a cross brace, and the inner top end is fixed by a top rod, the top rod is connected to the prefabricated fixed block by a pull rod, and an anchor plate is provided at the connecting end of the pull rod and the prefabricated fixed block.

[0016] Preferably, there is a step seven after step six, and step seven specifically comprises constructing slope vegetation in the vegetation concrete of the prefabricated blocks, and constructing slope top vegetation in the planting soil on top of the backfill soil.

[0017] This through-type ecological frame stepped revetment includes a compacted soil layer, a water collection tank and prefabricated blocks. Several layers of prefabricated blocks are arranged on the compacted soil layer in sequence. Backfill soil is arranged behind each layer of prefabricated blocks. A crushed stone layer is arranged between the backfill soil and the prefabricated blocks. Geogrids are arranged below every two layers of prefabricated blocks and the backfill soil above the normal water level line. Vegetative concrete for planting slope vegetation is filled in the prefabricated blocks above the normal water level line, and sand and gravel are filled in the prefabricated blocks below the normal water level line. The bottom layer of prefabricated blocks is fixed on the compacted soil layer by revetment pressure feet. Prefabricated fixing blocks are installed at the bank-facing end of the top of the backfill soil, and a pressure cap is poured above the top layer of prefabricated blocks.

[0018] The water collecting tank is set on the compacted soil layer. The top of the water collecting tank is connected to the back-slope drainage pipe in the backfill soil through the water inlet. The bottom of the water collecting tank is connected to the water collecting pipe through the water outlet. The water collecting pipe extends to the outside of the revetment. The water collecting tank is equipped with a middle partition for filtering.

[0019] A sand and gravel filling layer is constructed on the outer side of the revetment pressure foot, a prefabricated baffle is obliquely arranged on the side of the sand and gravel filling layer toward the bottom prefabricated block, and riprap is arranged between the prefabricated baffle and the bottom prefabricated block.

[0020] Preferably, a steel pipe is driven into the compacted soil layer below the bank protection foot, and fine sand is poured into the steel pipe. A gravel cushion layer is constructed on the compacted soil layer. The top of the steel pipe passes through the gravel cushion layer, and the bank protection foot is arranged on the top of the gravel cushion layer, including a lower prefabricated block and an upper prefabricated block. The lower prefabricated block includes transverse and vertical connecting holes, and the upper prefabricated block is provided with a transverse connecting hole. After the lower prefabricated block and the upper prefabricated block are spliced, the transverse connecting holes are horizontally penetrated, and connecting ribs are penetrated through the penetrated connecting holes; the steel pipe passes through the vertical connecting hole of the lower prefabricated block, and a positioning rib is installed on the top of the steel pipe, and the upper part of the positioning rib extends out of the bank protection foot; a reserved groove is provided on the top of the lower prefabricated block, and the top end of the steel pipe, the bottom end of the positioning rib and the connecting rib meet in the reserved groove of the lower prefabricated block, and post-cast concrete is provided in the reserved groove.

[0021] The beneficial effects of the present invention are:

[0022] 1) The present invention adopts a combined structure of revetment foot and riprap. The foot adopts a combined prefabricated block, which is assembled by an upper prefabricated block and a lower prefabricated block. The installation is convenient, and the connection ribs are inserted horizontally and the steel pipes are inserted vertically for fixing. The integrity of the revetment foot structure is also improved by post-casting concrete.

[0023] 2) The bank protection of the present invention forms a combined drainage pipe behind the slope through the drainage horizontal pipe and the drainage vertical pipe that are interconnected behind the slope. The bottom of the drainage pipe behind the slope is connected to the water collecting tank, which improves the drainage effect behind the slope.

[0024] 3) The present invention utilizes a water collecting tank as a drainage hub behind the bottom slope. A middle partition for filtering is provided in the middle of the water collecting tank. The filtering structure of the water collecting tank is utilized to achieve water purification and avoid blockage of the bank protection drainage system.

[0025] 4) In the present invention, the prefabricated blocks of the eco-frame are filled with vegetation concrete above the normal water level, which is conducive to planting slope vegetation; and sand and gravel are filled below the water level to avoid water erosion.

[0026] 5) The geogrid of the present invention is positioned by pressing prefabricated blocks and fixed plates to avoid displacement.

[0027] 6) The present invention utilizes the completed bank protection structure to install the top concrete casting formwork, thereby achieving a stable formwork and avoiding the use of additional formwork supporting components. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a schematic diagram of the construction of the bank protection structure of the present invention;

[0029] Figure 2 for Figure 1 A node zoomed in;

[0030] Figure 3 This is a schematic diagram of the revetment foot and riprap structure;

[0031] Figure 4 This is a schematic diagram of the water collecting tank;

[0032] Figure 5 This is the formwork structure diagram for the capping and capping concrete.

[0033] In the attached drawings, the components represented by the reference numerals are as follows: 1-compacted soil layer; 2-water collecting tank; 3-water inlet; 4-water outlet; 5-water collecting trough; 6-permeable hole; 7-filter sand layer; 8-permeable geotextile; 9-water collecting pipe; 10-steel pipe; 11-fine sand; 12-gravel cushion layer; 13-lower prefabricated block; 14-upper prefabricated block; 15-connecting ribs; 16-positioning ribs; 17-post-cast concrete; 18-sand and gravel filling layer; 19-prefabricated baffle; 20-riprap; 21-backfill soil; 22-gravel layer; 2 3-prefabricated block; 24-through hole; 25-sand and gravel; 26-drainage horizontal pipe; 27-drainage vertical pipe; 28-normal water level line; 29-vegetation concrete; 30-geogrid; 31-fixing ribs; 32-fixing plate; 33-anchoring vertical rod; 34-anchoring horizontal rod; 35-cross brace; 36-top pressure formwork; 37-top rod; 38-pull rod; 39-anchor plate; 40-prefabricated fixed block; 41-anchoring ribs; 42-groove; 43-railing; 44-slope vegetation; 45-planting soil; 46-slope top vegetation. DETAILED DESCRIPTION

[0034] The present invention is further described below in conjunction with embodiments. The description of the following embodiments is only used to help understand the present invention. It should be noted that for ordinary persons in the art, without departing from the principle of the present invention, the present invention can also be modified in some ways, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0035] Embodiment 1

[0036] As an embodiment, the construction method of the through-type ecological frame stepped revetment includes the following steps:

[0037] Step 1: Base compaction: level and compact the soil layer at the bottom of the revetment to form a compacted soil layer 1.

[0038] Bottom drainage construction: water collecting tanks 2 are arranged at intervals at the bottom of the backfill soil 21 behind the revetment slope. The top water inlet 3 of each water collecting tank 2 is used to connect the drainage vertical pipe 27 installed later. The bottom water outlet 4 of each water collecting tank 2 is connected to a horizontal water collecting pipe 9, and the outlet 4 of the water collecting pipe 9 extends out of the revetment. The water collecting tank 2 is a closed water storage and filtration structure with a top water inlet 3 and a bottom water outlet 4. The water collecting tank 2 has a middle partition with water permeable holes 6. The upper part of the middle partition is filled with a filter sand layer 7, and a permeable geotextile 8 is installed at the bottom of the filter sand layer 7. The water in the upper drainage vertical pipe 27 flows through the water collecting tank 2, enters the water collecting pipe 9 after being filtered through the sand layer, and is drained out of the revetment body through the water collecting pipe 9 to avoid blockage of the revetment drainage system.

[0039] Step 2, construction of revetment foot: construct revetment foot at the bottom of the ecological frame prefabricated block 23 to be constructed. Set up steel pipes 10 arranged at intervals at the foot position to enter the lower soil layer, and pour fine sand 11 into the steel pipes 10. Construct a gravel cushion layer 12 on the compacted soil layer 1, and the steel pipe 10 is in the form of passing through the gravel cushion layer 12. Install the lower prefabricated block 13 and the upper prefabricated block 14 on the top of the gravel cushion layer 12. The lower prefabricated block 13 has a transverse through hole and a vertical through hole, and the upper prefabricated block 14 has a transverse through hole. The transverse through holes of the two prefabricated blocks 23 are horizontally connected, and the connecting ribs 15 pass through the transverse through holes. The steel pipe 10 passes through the vertical through hole of the lower prefabricated block 13, and the positioning ribs 16 are installed on the top of the steel pipe 10. The upper part of the positioning ribs 16 extends out of the foot to position the first-floor prefabricated block 23. The top end of the steel pipe 10, the bottom end of the positioning rib 16, and the connecting rib 15 meet in the reserved groove of the lower prefabricated block 23, and the reserved groove is constructed with post-cast concrete 17. The first-floor prefabricated block 23 is limited by the left positioning rib 16. The prefabricated block 23 has a through hole 24, and the through holes 24 of the left and right prefabricated blocks 23 are continuously connected in the horizontal direction.

[0040] Step 3: Backfilling behind the bank slope: Backfilling behind the bank slope and constructing the drainage pipe behind the slope at the same time. The drainage pipe behind the slope includes a drainage horizontal pipe 26 and a drainage vertical pipe 27. The bottom of the drainage vertical pipe 27 is connected to the water inlet 3 of the water collecting tank 2.

[0041] Construction of ecological frame below the water level: After each layer of backfill 21 is filled, a crushed stone layer 22 is constructed between the backfill 21 and the prefabricated block 23, and then another layer of prefabricated block 23 is laid until the normal water level 28 is reached. The ecological frame of the prefabricated block 23 below the normal water level 28 is filled with sand and gravel 25.

[0042] Step 4: Construction of ecological frame above the water level: Above the normal water level 28, every two layers of prefabricated blocks 23 are built, backfill soil 21 and gravel layer 22 are constructed once, and vegetation concrete 29 is filled in the prefabricated blocks 23. A layer of geogrid 30 is set between each layer of backfill soil 21, and the geogrid 30 horizontally penetrates the backfill soil 21, the gravel layer 22, and the prefabricated blocks 23. The geogrid 30 is fixed in such a way that fixing ribs 31 are set between the gravel layer 22 and the prefabricated blocks 23 through the geogrid 30, and the top of the fixing ribs 31 is connected to the fixing plate 32, and the fixing plate 32 is pressed on the geogrid 30, and the top of the fixing plate 32 is pressed by the gravel layer 22 and the prefabricated blocks 23.

[0043] Step 5, capping construction: construct the revetment capping at the top of the top prefabricated block 23. Install the handrail 43. Install the prefabricated fixed block 40 at the bank side of the backfill 21. The bottom end of the prefabricated fixed block 40 is fixed by the anchor bar 41 that penetrates into the backfill 21. The top of the prefabricated block 23 has a groove 42, and the handrail 43 is installed in the groove 42. Anchoring vertical rods 33 are set between the top prefabricated block 23 and the gravel layer 22. The anchoring crossbars 34 are connected by the anchoring vertical rods 33. The outer side of the anchoring crossbars 34 is connected to the capping formwork 36. At the same time, the outer bottom end of the capping formwork 36 is fixed by the cross brace 35, and the inner top end is fixed by the top rod 37. The top rod 37 is connected to the anchor plate 39 on the outer side of the prefabricated block 23 by the tie rod 38. Construct the capping concrete.

[0044] Step 6: riprap construction: construct a gravel filling layer 18 outside the revetment foot, install an inclined prefabricated baffle 19 at the upper left corner of the gravel filling layer 18, and construct riprap 20 between the prefabricated baffle 19 and the first layer and the prefabricated block 23.

[0045] Step 7, vegetation planting: construct slope vegetation 44 in the vegetation concrete 29 of the prefabricated block 23. Construct slope top vegetation 46 in the planting soil 45 on the top of the backfill soil 21.

[0046] Embodiment 2

[0047] As another embodiment, the through-type ecological frame stepped revetment obtained by the method in embodiment 1 is as follows: Figures 1 to 5 As shown, it includes a compacted soil layer 1, a water collecting tank 2 and a prefabricated block 23.

[0048] like Figure 1 and Figure 2As shown, several layers of precast blocks 23 are arranged on the compacted soil layer 1 in sequence, backfill soil 21 is provided behind each layer of precast blocks 23, a crushed stone layer 22 is provided between the backfill soil 21 and the precast blocks 23, and geogrids 30 are provided between every two layers of precast blocks 23 and below the backfill soil 21 above the normal water level line 28; the precast blocks 23 above the normal water level line 28 are filled with vegetation concrete 29 for planting slope vegetation 44, and the precast blocks 23 below the normal water level line 28 are filled with sand and gravel 25; the bottom layer of precast blocks 23 is fixed to the compacted soil layer 1 by revetment pressure feet.

[0049] like Figure 3 As shown, a steel pipe 10 is driven on the compacted soil layer 1 below the revetment pressure foot, and fine sand 11 is poured into the steel pipe 10. A crushed stone cushion layer 12 is constructed on the compacted soil layer 1. The top of the steel pipe 10 passes through the crushed stone cushion layer 12. The revetment pressure foot is arranged on the top of the crushed stone cushion layer 12, including a lower prefabricated block 13 and an upper prefabricated block 14. The lower prefabricated block 13 includes horizontal and vertical connection holes, and the upper prefabricated block is provided with a horizontal connection hole. The lower prefabricated block 13 and the upper prefabricated block 14 are connected to each other. After splicing, the horizontal connection holes are horizontally connected, and the through connection holes are penetrated with connection ribs 15; the steel pipe 10 passes through the vertical connection holes of the lower prefabricated block 13, and a positioning rib 16 is installed on the top of the steel pipe 10, and the upper part of the positioning rib 16 extends out of the revetment pressure foot; a reserved groove is provided on the top of the lower prefabricated block 13, and the top end of the steel pipe 10, the bottom end of the positioning rib 16 and the connection rib 15 meet in the reserved groove of the lower prefabricated block 13, and the reserved groove is provided with post-cast concrete 17.

[0050] like Figure 4 As shown, the water collecting tank 2 is arranged on the compacted soil layer 1, the top of the water collecting tank 2 is connected to the back-slope drainage pipe in the backfill soil 21 through the water inlet 3, the bottom of the water collecting tank 2 is connected to the water collecting pipe 9 through the water outlet 4, the water collecting pipe 9 extends to the outside of the revetment, and the water collecting tank 2 is provided with a middle partition for filtering;

[0051] like Figure 3 As shown, a gravel filling layer 18 is constructed on the outer side of the revetment pressure foot, and a prefabricated baffle 19 is obliquely provided on the side of the gravel filling layer 18 toward the bottom prefabricated block 23, and riprap 20 is provided between the prefabricated baffle 19 and the bottom prefabricated block 23.

[0052] like Figure 5 As shown, a prefabricated fixed block 40 is installed at the bank end of the top of the backfill soil 21, and a capping is cast above the topmost prefabricated block 23. The bottom end of the prefabricated fixed block 40 is fixed by an anchoring bar 41 that penetrates into the backfill soil 21, and the top of the prefabricated block 23 has a groove 42, in which a railing 43 is installed. An anchoring vertical rod 33 is set between the top prefabricated block 23 and the gravel layer 22, and the anchoring vertical rod 33 is used to connect the anchoring cross bar 34, and the outer side of the anchoring cross bar 34 is connected to the capping template 36. At the same time, the outer bottom end of the capping template 36 is fixed by a cross brace 35, and the inner top end is fixed by a top rod 37, and the top rod 37 is connected to the anchor plate 39 on the outer side of the prefabricated block 23 by a tie rod 38.

Claims

1. A construction method for a through-type ecological frame stepped revetment, characterized in that: The steps include: Step 1: Construction of water collecting tank: construct a compacted soil layer (1), arrange a water collecting tank (2) on the compacted soil layer (1) after the designed position of the revetment slope, and extend the water collecting tank (2) out of the revetment through a water collecting pipe (9); Step 2, construction of the revetment foot: a steel pipe (10) is placed on the compacted soil layer (1) and a crushed stone cushion layer (12) is constructed, a lower prefabricated block (13) and an upper prefabricated block (14) are installed to form a revetment foot, and a layer of prefabricated blocks (23) are constructed on the revetment foot; steel pipes (10) are placed at intervals on the compacted soil layer (1), fine sand (11) is poured into the steel pipes (10), a crushed stone cushion layer (12) is constructed on the compacted soil layer (1), the top of the steel pipe (10) passes through the crushed stone cushion layer (12), and the lower prefabricated block (13) and the upper prefabricated block (14) are installed on the top of the crushed stone cushion layer (12), the lower prefabricated block (13) has horizontal and vertical connection holes, the upper prefabricated block is provided with a horizontal connection hole, and the lower prefabricated block (13) and the upper prefabricated block (14) are horizontally The connecting hole is horizontally penetrated and is penetrated by a connecting rib (15); the steel pipe (10) passes through the vertical connecting hole of the lower prefabricated block (13); a positioning rib (16) is installed on the top of the steel pipe (10); the upper part of the positioning rib (16) extends out of the revetment foot; a reserved groove is provided on the top of the lower prefabricated block (13); the top end of the steel pipe (10), the bottom end of the positioning rib (16) and the connecting rib (15) meet in the reserved groove of the lower prefabricated block (13); post-cast concrete (17) is constructed in the reserved groove; the prefabricated block (23) of the lowest layer is limited by the positioning rib (16); the prefabricated block (23) has a through hole (24); the through holes (24) of the prefabricated blocks (23) of the same layer are horizontally continuous and penetrated; the prefabricated blocks (23) below the normal water level line (28) are filled with sand and gravel (25); Step 3: Backfilling behind the bank slope: backfill soil (21) is set behind the prefabricated block (23), and a drainage pipe behind the slope is constructed simultaneously; a crushed stone layer (22) is constructed between the backfill soil (21) and the prefabricated block (23), and then a layer of prefabricated blocks (23) is laid; step 3 is repeated until the normal water level (28) is reached; Step 4: Building the ecological frame above the water level: Continue to construct the prefabricated blocks (23). After every two layers of prefabricated blocks (23), backfill soil (21) and gravel layer (22) are constructed, and the prefabricated blocks (23) above the normal water level (28) are filled with vegetation concrete (29); Step 5: Top-pressing construction: Install prefabricated fixing blocks (40) at the bank side of the backfill soil (21), support the top-pressing formwork (36), and then pour the top-pressing concrete; Step 6: riprap construction: construct a sand and gravel filling layer (18) and a prefabricated baffle (19) outside the revetment pressure foot, and construct riprap (20) between the prefabricated baffle (19) and the lowest prefabricated block (23).

2. The construction method of the through-type ecological frame stepped revetment according to claim 1 is characterized in that: The water collecting box (2) is provided with a water inlet (3) at the top and a water outlet (4) at the bottom. A middle partition is provided inside the water collecting box (2). The middle partition has water permeable holes (6). The upper part of the middle partition is filled with a filter sand layer (7). A permeable geotextile (8) is installed at the bottom of the filter sand layer (7). The back slope drainage pipe comprises a drainage horizontal pipe (26) and a drainage vertical pipe (27). Water in the drainage vertical pipe (27) flows through the water collecting box (2), passes through the filter sand layer (7), enters the water collecting pipe (9), and is drained out of the bank protection body through the water collecting pipe (9).

3. The construction method of the through-type ecological frame stepped revetment according to claim 1 is characterized in that: In step 4, a layer of geogrid (30) is provided at the bottom of each layer of backfill soil (21) above the normal water level line (28), and the geogrid (30) transversely penetrates the backfill soil (21), the crushed stone layer (22) and the prefabricated block (23). The geogrid (30) is fixed in such a way that fixing ribs (31) are provided between the crushed stone layer (22) and the prefabricated block (23), and the top of the fixing ribs (31) is connected with a fixing plate (32), and the fixing plate (32) is pressed onto the geogrid (30), and the top of the fixing plate (32) is pressed by the crushed stone layer (22) and the prefabricated block (23).

4. The construction method of the through-type ecological frame stepped revetment according to claim 1 is characterized in that: The bottom end of the prefabricated fixed block (40) is extended into the backfill soil (21) for fixation through anchor bars (41); the top of the prefabricated block (23) is provided with a groove (42), and a railing (43) is installed in the groove (42); an anchoring vertical rod (33) is provided between the uppermost prefabricated block (23) and the gravel layer (22); an anchoring horizontal rod (34) is connected to the anchoring vertical rod (33); the outer side of the anchoring horizontal rod (34) is connected to the top pressing formwork (36); at the same time, the outer bottom end of the top pressing formwork (36) is fixed by a horizontal brace (35), and the inner top end is fixed by a top rod (37); the top rod (37) is connected to the prefabricated fixed block (40) through a tie rod (38), and an anchoring plate (39) is provided at the connecting end of the tie rod (38) and the prefabricated fixed block (40).

5. The construction method of the through-type ecological frame stepped revetment according to claim 1 is characterized in that: After step six, there is step seven, which specifically includes constructing slope vegetation (44) in the vegetation concrete (29) of the prefabricated block (23), and constructing slope top vegetation (46) in the planting soil (45) on the top of the backfill soil (21).

6. The through-type ecological frame stepped revetment obtained by the method according to any one of claims 1 to 5 is characterized in that: The invention comprises a compacted soil layer (1), a water collecting tank (2) and prefabricated blocks (23), wherein several layers of prefabricated blocks (23) are sequentially arranged on the compacted soil layer (1), a backfill soil (21) is arranged behind each layer of prefabricated blocks (23), a crushed stone layer (22) is arranged between the backfill soil (21) and the prefabricated blocks (23), and a geogrid (30) is arranged above a normal water level line (28) and below every two layers of prefabricated blocks (23) and the backfill soil (21); The prefabricated blocks (23) above the surface (28) are filled with vegetation concrete (29) for planting slope vegetation (44), and the prefabricated blocks (23) below the normal water level (28) are filled with sand and gravel (25); the prefabricated blocks (23) at the bottom layer are fixed on the compacted soil layer (1) by revetment pressure feet; a prefabricated fixing block (40) is installed at the bank-facing end of the top of the backfill soil (21), and a pressure cap is cast above the prefabricated blocks (23) at the top layer; The water collecting box (2) is arranged on the compacted soil layer (1); the top of the water collecting box (2) is connected to the back-slope drainage pipe in the backfill soil (21) through the water inlet (3); the bottom of the water collecting box (2) is connected to the water collecting pipe (9) through the water outlet (4); the water collecting pipe (9) extends to the outside of the revetment; and a middle partition for filtering is arranged inside the water collecting box (2); A gravel filling layer (18) is constructed on the outer side of the revetment pressure foot, a prefabricated baffle (19) is obliquely arranged on the side of the gravel filling layer (18) facing the bottom prefabricated block (23), and riprap (20) is arranged between the prefabricated baffle (19) and the bottom prefabricated block (23).

7. The through-type ecological frame stepped revetment according to claim 6 is characterized by: A steel pipe (10) is driven on the compacted soil layer (1) below the revetment pressure foot, fine sand (11) is poured into the steel pipe (10), a crushed stone cushion layer (12) is constructed on the compacted soil layer (1), the top of the steel pipe (10) passes through the crushed stone cushion layer (12), the revetment pressure foot is arranged on the top of the crushed stone cushion layer (12), and comprises a lower prefabricated block (13) and an upper prefabricated block (14), the lower prefabricated block (13) comprises a horizontal and vertical connection hole, the upper prefabricated block is provided with a horizontal connection hole, the lower prefabricated block (13) and the upper prefabricated block (14) are connected to each other. 4) After the splicing, the transverse connection holes are transversely connected, and a connection rib (15) is inserted into the connected connection holes; the steel pipe (10) passes through the vertical connection hole of the lower prefabricated block (13), and a positioning rib (16) is installed on the top of the steel pipe (10), and the upper part of the positioning rib (16) extends out of the revetment pressure foot; a reserved groove is provided on the top of the lower prefabricated block (13), and the top end of the steel pipe (10), the bottom end of the positioning rib (16) and the connection rib (15) meet in the reserved groove of the lower prefabricated block (13), and post-cast concrete (17) is provided in the reserved groove.

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