Plastic drainage plate soft soil roadbed treatment construction method

Abstract

The invention discloses a plastic drainage plate soft soil roadbed treatment construction method, and relates to the technical field of roadbed construction method.The plastic drainage plate soft soil roadbed treatment construction method comprises a plastic drainage plate, an anti-seepage mulching film, a lower sand cushion layer, an upper sand cushion layer and construction equipment, the lower sand cushion layer is laid on the top face of the anti-seepage mulching film, and the upper sand cushion layer is laid on the top face of the lower sand cushion layer; a plastic drainage plate is inserted between the water-seepage-preventing mulching film and the lower sand cushion layer in a penetrating mode, the construction equipment comprises a plate inserting machine, a guide pipe shoe, a pile tip and a cutting machine, and the water-seepage-preventing mulching film is additionally arranged in the construction process, so that the phenomenon that pore water released in the plastic drainage plate seeps downwards can be avoided; the joints of the different anti-seepage mulching films are staggered and overlapped in a folding butt joint mode and laid in the drainage grooves, discharged pore water can be drained to a designated drainage area, in this way, the pore water in the soil body is effectively taken out and discharged, the soil layer is gradually solidified, the roadbed is settled, and therefore the strength of the roadbed is improved.

Description

Technical Field

[0001] The invention relates to the technical field of roadbed construction methods, in particular to a construction method for treating a soft soil roadbed with a plastic drainage board. Background Art

[0002] Vertical plastic drain boards are used to treat soft roadbeds. The water in the roadbed is removed by plastic drain boards to increase the effective stress on soil particles to accelerate the consolidation and settlement of the roadbed, thereby achieving the purpose of improving strength. The plastic drain board method is a form of drainage consolidation method. The drainage consolidation method is to first set up vertical drainage bodies such as sand wells or plastic drain boards in the roadbed, and then use the weight of the building (structure) itself to gradually load it in stages.

[0003] At present, when plastic drainage boards are used on soft soil roadbeds, the discharged pore water is prone to re-infiltrate into the soil layer. This situation not only prolongs the entire construction time, but also causes the strength of the soft soil roadbed to fail to meet the predetermined requirements. Summary of the invention

[0004] The purpose of the present invention is to provide a construction method for treating soft soil roadbed with a plastic drainage board, so as to solve the problems raised in the above-mentioned background technology.

[0005] By adopting the above technical solution, it is possible to effectively prevent the discharged pore water from seeping back into the soil layer. In view of the above problems, the technical solution proposed by the present invention is:

[0006] A construction method for treating soft soil roadbed with a plastic drainage board comprises a plastic drainage board, an anti-seepage ground film, a lower sand cushion layer, an upper sand cushion layer and construction equipment, wherein the lower sand cushion layer is laid on the top surface of the anti-seepage ground film, the upper sand cushion layer is laid on the top surface of the lower sand cushion layer, and the plastic drainage board is inserted between the anti-seepage ground film and the lower sand cushion layer, and the construction equipment comprises a board inserting machine, a guide shoe, a pile tip and a cutting machine, wherein the specific construction method comprises the following steps:

[0007] S1. Leveling the roadbed surface: clean up the soil piles in the site and fill them into the depressions, and then spread the excess soil layer to the soft soil roadbed currently under construction;

[0008] S2. Laying water-proof ground membrane: by opening a plurality of drainage grooves on the flat roadbed, and spreading a plurality of groups of water-proof ground membranes on the roadbed respectively, wherein the intersections of different water-proof ground membranes are staggered and overlapped by folding and butting, and then laid in the drainage grooves;

[0009] S3. Spreading the lower sand cushion layer: Spreading the lower sand cushion layer on the surface of the water-proof ground film, and moving the lower sand cushion layer to keep its top surface at the same level;

[0010] S4. Position division of the plugging board: Sprinkle the marked lime on the surface of the lower sand cushion layer in a point-line distribution manner until a mesh structure is formed, wherein each point is set as a plugging position;

[0011] S5. Inserting the drain board at a fixed point: by moving the plugging machine, the plugging machine drives the plastic drain board to move the insertion position, and a conduit boot is sleeved on the outside of the plastic drain board to wrap the plastic drain board, and then the pile tip is assembled to the output end of the plugging machine, and by starting the plugging machine, the output end drives one end of the plastic drain board to press down the pile tip until the pile tip enters the soil layer at a specified depth, and then one end of the plastic drain board is retained in the soil layer, and by pulling out the pile tip, the reserved length of the plastic drain board emerges from the lower sand cushion layer, and then the reserved position is cut by using a cutting machine so that the cut end remains horizontal;

[0012] S6. Spread the upper sand cushion layer: Spread the upper sand cushion layer on the surface of the lower sand cushion layer, and bury the reserved end of the plastic drainage board.

[0013] As a preferred technical solution of the present invention, the anti-seepage ground membrane includes a first membrane strip and a second membrane strip, and adjacent sides of the first membrane strip and the second membrane strip are respectively provided with folded edges, and the two folded edges are staggered and overlapped with each other.

[0014] As a preferred technical solution of the present invention, in step S2, the plurality of drainage grooves are distributed parallel to each other, and the distance between every two drainage grooves is controlled to be 80-90 cm.

[0015] As a preferred technical solution of the present invention, in step S3, the thickness of the lower sand cushion layer is controlled to be 5 to 10 cm.

[0016] As a preferred technical solution of the present invention, in step S4, the distance between every two insertion positions is controlled to be 50-70 cm.

[0017] As a preferred technical solution of the present invention, in step S5, the reserved length of the plastic drainage board is 20 to 30 cm.

[0018] As a preferred technical solution of the present invention, in step S6, the thickness of the upper sand cushion layer is equal to that of the lower sand cushion layer, and the upper sand cushion layer and the lower sand cushion layer form a stacked tower shape.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The construction method for treating soft soil roadbed with plastic drainage board can stop the infiltration of pore water released from the plastic drainage board by adding anti-seepage ground film during the construction process, wherein the intersections of different anti-seepage ground films are staggered and overlapped by folding and docking, and laid in the drainage ditch, so that the discharged pore water can be drained to the designated discharge area, and the pore water in the soil is effectively taken out and discharged in this way, so that the soil layer is gradually consolidated, the roadbed settles, and the strength of the roadbed is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 A flowchart of the construction method for treating soft soil roadbed with plastic drainage board provided by the present invention;

[0022] Figure 2 A schematic diagram of the engineering of the soft soil roadbed treatment construction method of the plastic drainage board provided by the present invention;

[0023] Figure 3 A schematic diagram of the anti-seepage ground membrane structure in the soft soil roadbed treatment construction method of the plastic drainage board provided by the present invention;

[0024] Figure 4 A diagram showing a construction equipment style for the soft soil roadbed treatment construction method using plastic drainage boards provided by the present invention.

[0025] In the figure: 100, plastic drainage board; 200, anti-seepage ground membrane; 2001, first membrane strip; 2002, second membrane strip; 300, lower sand cushion layer; 400, upper sand cushion layer; 101, construction equipment; 1011, board inserting machine; 1012, catheter boot; 1013, pile tip; 1014, cutting machine. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] Embodiment 1

[0028] See also Figure 1-Figure 4The present invention provides a technical solution: a construction method for treating soft soil roadbed with a plastic drainage board, comprising a plastic drainage board 100, an anti-seepage membrane 200, a lower sand cushion layer 300, an upper sand cushion layer 400 and a construction device 102, wherein the lower sand cushion layer 300 is laid on the top surface of the anti-seepage membrane 200, the upper sand cushion layer 400 is laid on the top surface of the lower sand cushion layer 300, the plastic drainage board 100 is inserted between the anti-seepage membrane 200 and the lower sand cushion layer 300, the construction device 101 comprises a board inserting machine 1011, a guide shoe 1012, a pile tip 1013 and a cutting machine 1014, wherein the specific construction method comprises the following steps:

[0029] S1. Leveling the roadbed surface: clean up the soil piles in the site and fill them into the depressions, and then spread the excess soil layer to the soft soil roadbed currently under construction;

[0030] S2. Laying water-proof ground film: by opening a plurality of drainage grooves on a flat roadbed, and spreading a plurality of groups of water-proof ground films 200 on the roadbed respectively, wherein the intersections of different water-proof ground films 200 are staggered and overlapped by folding and docking, and they are laid in the drainage grooves;

[0031] S3, spreading the lower sand cushion layer: spreading the lower sand cushion layer 300 on the surface of the water-proof ground film 200, and moving the lower sand cushion layer 300 so that its top surface remains at the same horizontal plane;

[0032] S4, dividing the positions of the plugging plates: by means of point and line distribution, marking lime is sprinkled on the surface of the lower sand cushion layer 300 until a mesh structure is formed, wherein each point is set as a plugging position;

[0033] S5. Insert the drain board at a fixed point: move the plugging machine 1011 so that the plugging machine 1011 drives the plastic drain board 100 to move the insertion position, and sleeve the conduit boot 1012 on the outside of the plastic drain board 100 to wrap the plastic drain board 100, then assemble the pile tip 1013 to the output end of the plugging machine 1011, and start the plugging machine 1011 so that the output end drives one end of the plastic drain board 100 to press down the pile tip 1013 until the pile tip 1013 enters the soil layer at a specified depth, and then retains one end of the plastic drain board 100 in the soil layer, and by pulling out the pile tip 1013, the reserved length of the plastic drain board 100 emerges from the lower sand cushion layer 300, and then the reserved position is cut by using the cutter 1014 so that the cut end remains horizontal;

[0034] S6. Spread the upper sand cushion layer: Spread the upper sand cushion layer 400 on the surface of the lower sand cushion layer 300 and bury the reserved end of the plastic drainage board 100

[0035] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0036] The water-proof ground membrane 200 includes a first membrane strip 2001 and a second membrane strip 2002. The first membrane strip 2001 and the second membrane strip 2002 are provided with folded edges on adjacent sides, and the two folded edges overlap each other. In step S2, the plurality of drainage grooves are arranged parallel to each other, and the distance between each two drainage grooves is controlled to be 80 cm.

[0037] Wherein, in step S3, the thickness of the lower sand cushion layer 300 is controlled at 5 cm.

[0038] Wherein, in step S4, the distance between every two insertion positions is controlled to be 50 cm.

[0039] Wherein, in step S5, the reserved length of the plastic drainage board 100 is 20 cm.

[0040] In step S6 , the upper sand cushion layer 400 and the lower sand cushion layer 300 have the same thickness, and the upper sand cushion layer 400 and the lower sand cushion layer 300 form a stacked tower shape.

[0041] Embodiment 2

[0042] The specific construction method and steps are the same as those in the first embodiment.

[0043] Wherein, in step S2, a plurality of drainage grooves are distributed parallel to each other, and the distance between every two drainage grooves is controlled to be 85 cm.

[0044] Wherein, in step S3, the thickness of the lower sand cushion layer 300 is controlled at 7 cm.

[0045] Wherein, in step S4, the distance between every two insertion positions is controlled to be 60 cm.

[0046] Wherein, in step S5, the reserved length of the plastic drainage board 100 is 25 cm.

[0047] Embodiment 3

[0048] The specific construction method and steps are the same as those in the first embodiment.

[0049] Wherein, in step S2, a plurality of drainage grooves are distributed parallel to each other, and the distance between every two drainage grooves is controlled to be 90 cm.

[0050] Wherein, in step S3, the thickness of the lower sand cushion layer 300 is controlled at 10 cm.

[0051] Wherein, in step S4, the distance between every two insertion positions is controlled to be 70 cm.

[0052] Among them, in step S5, the reserved length of the plastic drainage board 100 is 30 cm

[0053] In summary, the construction completed by the methods used in different embodiments can effectively prevent pore water from re-penetrating into the soil layer, while maintaining the construction progress, it can also ensure the strength requirements of the soft soil roadbed.

[0054] Although the present invention has been disclosed as above with preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art may make some modifications and improvements without departing from the spirit and scope of the present invention. Therefore, the scope of protection of the present invention shall be based on the definition of the claims.

Claims

1. A construction method for treating soft soil roadbed with a plastic drainage board, characterized in that: The invention comprises a plastic drainage board (100), an anti-seepage ground film (200), a lower sand cushion layer (300), an upper sand cushion layer (400) and construction equipment (102), wherein the lower sand cushion layer (300) is laid on the top surface of the anti-seepage ground film (200), and the upper sand cushion layer (400) is laid on the top surface of the lower sand cushion layer (300), and the plastic drainage board (100) is inserted between the anti-seepage ground film (200) and the lower sand cushion layer (300), and the construction equipment (101) comprises a board inserting machine (1011), a guide tube boot (1012), a pile tip (1013) and a cutting machine (1014), wherein the specific construction method comprises the following steps: S1. Leveling the roadbed surface: clean up the soil piles in the site and fill them into the depressions, and then spread the excess soil layer to the soft soil roadbed currently under construction; S2, laying water-proof ground membrane: by opening a plurality of drainage grooves on a flat roadbed, and spreading a plurality of groups of water-proof ground membranes (200) on the roadbed respectively, wherein the intersections of different water-proof ground membranes (200) are staggered and overlapped by folding and butting, and then laid in the drainage grooves; S3, spreading the lower sand cushion layer: spreading the lower sand cushion layer (300) on the surface of the water-proof ground membrane (200), and moving the lower sand cushion layer (300) so that its top surface remains at the same horizontal plane; S4, dividing the positions of the plugging plates: by means of point and line distribution, marking lime is sprinkled on the surface of the lower sand cushion layer (300) until a mesh structure is formed, wherein each point is set as a plugging position; S5, inserting the drainage board at a fixed point: by moving the board inserting machine (1011), the board inserting machine (1011) drives the plastic drainage board (100) to move the insertion position, and sleeves the conduit boot (1012) on the outside of the plastic drainage board (100) to wrap the plastic drainage board (100), and then assembles the pile tip (1013) to the output end of the board inserting machine (1011), and by starting the board inserting machine (1011), the output end drives one end of the plastic drainage board (100) to press the pile tip (1013) downward until the pile tip (1013) enters the soil layer at a specified depth, and then one end of the plastic drainage board (100) is retained in the soil layer, and by pulling out the pile tip (1013), the reserved length of the plastic drainage board (100) emerges from the lower sand cushion layer (300), and then the reserved position is cut by using a cutting machine (1014), so that the cut end remains horizontal; S6. Spreading the upper sand cushion layer: Spreading the upper sand cushion layer (400) on the surface of the lower sand cushion layer (300), and burying the reserved end of the plastic drainage board (100).

2. The construction method for treating soft soil roadbed with plastic drainage board according to claim 1 is characterized in that: The anti-seepage ground membrane (200) comprises a first membrane strip (2001) and a second membrane strip (2002), and adjacent sides of the first membrane strip (2001) and the second membrane strip (2002) are respectively provided with folded edges, and the two folded edges are staggered and overlapped with each other.

3. The construction method for treating soft soil roadbed with plastic drainage board according to claim 1 is characterized in that: In step S2, the plurality of drainage grooves are arranged parallel to each other, and the distance between every two drainage grooves is controlled to be 80-90 cm.

4. The construction method for treating soft soil roadbed with plastic drainage board according to claim 1 is characterized in that: In step S3, the thickness of the lower sand cushion layer (300) is controlled to be 5-10 cm.

5. The construction method for treating soft soil roadbed with plastic drainage board according to claim 1 is characterized in that: In step S4, the distance between every two insertion positions is controlled to be 50-70 cm.

6. The construction method for treating soft soil roadbed with plastic drainage board according to claim 1 is characterized in that: In step S5, the reserved length of the plastic drainage board (100) is 20 to 30 cm.

7. The construction method for treating soft soil roadbed with plastic drainage board according to claim 1 is characterized in that: In step S6, the thickness of the upper sand cushion layer (400) and the lower sand cushion layer (300) are equal, and the upper sand cushion layer (400) and the lower sand cushion layer (300) form a stacked tower shape.

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