A cross-radiation plastic drainage plate and its plate inserting device and construction method

Abstract

The application discloses a cross radiation plastic drainage plate, which comprises vertical plastic drainage plates, N equidistant horizontal plastic drainage plates arranged on the vertical plastic drainage plates, wing vertical drainage plates intersecting with the horizontal plastic drainage plates, horizontal through holes formed by bending the bottom edges of the vertical plastic drainage plates upwards and fixing the bent bottom edges, and rivets arranged in the through holes. Meanwhile, a plug device capable of completely wrapping the cross radiation plastic drainage plate is provided for the drainage plate penetration construction. The outer edge of the plug device is provided with a hinge structure capable of being opened and closed. The hinge structure is closed during penetration, so that the sealing property of the plug device is ensured, and external soil is prevented from entering the plug device. When the plug device is pulled out, the hinge structure is opened, so that the plastic drainage plate is prevented from being pulled out or cut off. The application can effectively solve the problem of the attenuation of the vacuum degree in soil, and greatly improves the foundation treatment effect of vacuum preloading.

Description

Technical Field

[0001] This invention relates to a construction method for vacuum preloading foundation treatment, and more particularly to a novel cross-shaped radial plastic drainage board, its insert plate device, and construction method. Background Technology

[0002] Soft soil generally refers to saturated cohesive soil with a natural water content greater than the liquid limit and a natural void ratio greater than 1, including silt, silty soil, peat, and peat soil. Marine, lacustrine, and fluvial soft soils are widely distributed along my country's coast, the middle and lower reaches of the Yangtze River, inland lakes, and river valleys. Additionally, there is a large amount of soft soil created during land reclamation projects and port and waterway dredging. Due to the high compressibility, low shear strength, and poor permeability of soft soil, reinforcement treatment is necessary before constructing projects on soft soil foundations.

[0003] Vacuum preloading is an effective technique for treating soft soil foundations and has been widely used in geotechnical and civil engineering fields. The vacuum preloading method involves inserting vertical plastic drainage boards into the soft soil foundation, then laying a sand cushion layer on the ground and covering it with an airtight film. A vacuum is created under the film to generate negative pressure, thereby increasing the effective stress in the soil. The gradual seepage of pore water into the vertical plastic drainage boards causes soil consolidation and settlement, improving the soil's strength and bearing capacity.

[0004] Vertical plastic drainage boards serve two main functions: firstly, to transfer and diffuse negative pressure into the foundation; and secondly, to act as drainage channels. The magnitude and transmission efficiency of the negative pressure energy are the most crucial factors in ensuring the effectiveness of foundation treatment, as these are key factors in foundation compression and consolidation. In practical engineering, negative pressure attenuates not only along the depth direction but also radially due to the presence of soil columns around the drainage board. Therefore, some scholars have proposed a linear radial plastic drainage board system, where a series of linear plastic drainage boards are installed laterally at different depths from the vertical ones.

[0005] However, the linear radiant plastic drainage board still suffers from rapid negative pressure attenuation at the top and bottom of the horizontal drainage board. Summary of the Invention

[0006] To address the aforementioned shortcomings of existing technologies, this invention provides a radially arranged cross-shaped plastic drainage board. This board, with a series of cross-shaped plastic drainage boards positioned at different depths along the transverse direction, simultaneously solves the problems of rapid radial negative pressure attenuation in vertical plastic drainage boards and rapid negative pressure attenuation at the top and bottom of linearly arranged radial plastic drainage boards. This significantly increases the effective influence range of the plastic drainage board. Furthermore, this radially arranged plastic drainage board can expand the foundation reinforcement range and improve the foundation consolidation rate. The invention also provides an insertion device and construction method for the radially arranged plastic drainage board. Utilizing this radially arranged plastic drainage board solves the problem of vertical and radial attenuation of vacuum in the soil during vacuum preloading foundation treatment, greatly improving the efficiency and effectiveness of vacuum preloading foundation treatment.

[0007] To address the aforementioned technical problems, this invention proposes a cross-shaped radial plastic drainage board, a matching insert device, and a construction method for inserting the drainage board into a soft soil foundation using the insert device.

[0008] The present invention proposes a cross-shaped radial plastic drainage board, comprising a vertical plastic drainage board, wherein N equidistant horizontal plastic drainage boards are provided on the vertical plastic drainage board along the length direction, and each horizontal plastic drainage board has a wing vertical drainage board on both sides that intersects with the horizontal plastic drainage board and is symmetrically arranged; the bottom edge of the vertical plastic drainage board has a horizontal through hole formed by bending and fixing the board upward, and a rivet is provided in the through hole.

[0009] Furthermore, in the cross-shaped radial plastic drainage board of the present invention, wherein:

[0010] The length of the vertical plastic drainage board is L+2×L0+L1, where L0 is the amount by which the bottom edge of the vertical plastic drainage board bends upward, L1 is the amount by which the top of the vertical plastic drainage board extends beyond the top of the wing vertical drainage board located at the top position, the distance between two adjacent horizontal plastic drainage boards is A, A=L / N, the length of the wing of the horizontal plastic drainage board is L2, and the length of the wing vertical drainage board is L3, where L3 is 0.5~0.6A and less than L2.

[0011] The bottom edge of the vertical plastic drainage board is bent upwards and fixed with several short nails. The axial length of the nails is H, and the lateral width of the vertical plastic drainage board is W, where H is greater than W.

[0012] Meanwhile, this invention also proposes an insert plate device for the construction of the aforementioned cross-shaped radial plastic drainage board. This insert plate device includes a bottom unit and N-1 upper units sequentially welded in series above the bottom unit. Both the upper and bottom units include a main body sleeve, which includes a front plate and a rear plate. The front plate consists of three parallel vertical strips and a horizontal strip penetrating the three vertical strips. The rear plate has the same shape as the front plate. End plates are connected between the two sides of the front and rear plates. The overall outline of the bottom unit and the upper unit connected in series is a similar shape larger than the outline of the region corresponding to length L in the cross-shaped radial plastic drainage board. The main body sleeve of the upper unit, except for the top and bottom of the middle vertical strip, has a first hinge structure that opens in two between the edges of the front and rear plates. The main body sleeve of the bottom unit, except for the top of the middle vertical strip, has a first hinge structure that opens in two between the edges of the front and rear plates. In this design, the hinge structure at the bottom edge of the middle vertical strip is a second hinge structure, and the hinge structures at the remaining edges are first hinge structures. The first hinge structure has two rectangular hinge pieces, and the second hinge structure has two U-shaped hinge pieces, with the U-shaped notch located on one side adjacent to the other hinge piece. When the first hinge structures located at the top and bottom of the vertical and horizontal strips are closed, the two rectangular hinge pieces form a 90° angle. The first hinges located on both sides of the vertical strip... After the structure is closed, the two rectangular hinge pieces are at 180°. In the bottom unit, after the second hinge structure located on the middle vertical strip bottom plate is closed, the two U-shaped hinge pieces are at 90° and a rectangular hole is formed between the two hinge pieces. The horizontal dimension of the rectangular hole is H1, W < H1 < H, and the width of the rectangular hole is greater than the thickness of the vertical plastic drainage board. After all the first and second hinge structures are opened, the hinge pieces are flush with the front plate or the rear plate or located outside the front plate or the rear plate, respectively.

[0013] Furthermore, in the insert plate device of the present invention, wherein:

[0014] The amount by which the overall outline of the bottom unit and the upper unit connected in series exceeds the periphery of the outline of the area corresponding to length L in the cross-shaped radial plastic drainage board is such that the insert plate device covers the cross-shaped radial plastic drainage board after all the hinges in the insert plate device are closed.

[0015] The construction of the cross-shaped radial plastic drainage board using the aforementioned insert plate device includes the following steps:

[0016] Step 1) Bend the bottom of the cross-shaped radial plastic drainage board, fix it with a row of short nails, and then insert the rivets into the formed through holes;

[0017] Step 2) Open all the hinge structures of the insert plate device and insert the cross-shaped radial plastic drainage plate into the insert plate device; when the cross-shaped radial plastic drainage plate is fully inserted into the insert plate device and the rivet is located at the lower part of the vertical plastic drainage plate; close all the hinges, and the rivet is just exposed outside the rectangular hole of the second hinge structure and is attached to the outside of the two hinge pieces of the hinge; at this point, the assembly of the cross-shaped radial plastic drainage plate and the insert plate device is completed.

[0018] Step 3) Erect the inserting device with the cross-shaped radial plastic drainage board, and use the inserting machine to insert the inserting device together with the cross-shaped radial plastic drainage board into the soft soil foundation.

[0019] Step 4) After the insert plate device, carrying the cross-shaped radial plastic drainage board, has penetrated to the designed depth, open all the hinges of the insert plate device; then pull out the insert plate device; the cross-shaped radial plastic drainage board remains at the designed depth and position.

[0020] Step 5) Repeat steps 1 to 4 above to install the next cross-shaped radial plastic drainage board until all cross-shaped radial plastic drainage boards in the site are installed.

[0021] Compared with the prior art, the beneficial effects of the present invention are:

[0022] By setting a series of cross-shaped plastic drainage boards at different depths along the horizontal direction, the problem of rapid negative pressure attenuation along the radial direction of the vertical plastic drainage board and the problem of rapid negative pressure attenuation at the top and bottom of the straight radial plastic drainage board can be solved simultaneously. This can greatly improve the effective influence range of the plastic drainage board, as shown in Figures 3(a), 3(b) and 3(c), thereby expanding the foundation reinforcement range and improving the foundation consolidation rate.

[0023] Since there is currently no suitable insertion device for cross-shaped radial plastic drainage boards, this invention proposes an insertion device and its construction method for cross-shaped radial plastic drainage boards. This insertion device can also be used for the installation of linear radial plastic drainage boards. This novel cross-shaped radial plastic drainage board, its insertion device, and its construction method can effectively solve the problem of vacuum attenuation in the soil during foundation treatment using vacuum preloading, greatly improving the efficiency and effectiveness of vacuum preloading for foundation treatment. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the cross-shaped radial plastic drainage board proposed in this invention;

[0025] Figure 2 yes Figure 1 A partial structural diagram of the bottom of the drainage board shown in section A;

[0026] Figures 3(a) to 3(c) These are schematic diagrams of the effective influence range of different types of drainage boards, wherein: Figure 3(a) is a schematic diagram of the effective influence range of a vertical plastic drainage board, Figure 3(b) is a schematic diagram of the effective influence range of a linear radial plastic drainage board, and Figure 3(c) is a schematic diagram of the effective influence range of the cross-radial plastic drainage board of the present invention;

[0027] Figure 4 This is a schematic diagram of the insert device for a cross-shaped radial plastic drainage board.

[0028] Figure 5 This is a structural schematic diagram of the upper unit 100 in the insert plate device;

[0029] Figure 6 This is a structural schematic diagram of the bottom unit 200 in the insert plate device;

[0030] Figures 7(a) to 7(d) Figure 7(a) is a schematic diagram of the bottom unit of the insert plate device, wherein: Figure 7(b) is a schematic diagram of the lower part of the middle vertical strip of the bottom unit, Figure 7(c) is a schematic diagram of the side of the horizontal strip in the bottom unit, and Figure 7(d) is a schematic diagram of the lower part of the two vertical strips in the bottom unit.

[0031] Figure 8(a) is a right view of the side vertical strip (9) hinge structure when closed;

[0032] Figure 8(b) is a schematic diagram of the closed state of the first hinge structure at the lower edge of the two vertical strips shown in part B of Figure 8(a);

[0033] Figure 8(c) is a schematic diagram of the first hinge structure at the lower edge of the two vertical strips shown in part B of Figure 8(a) in the open state;

[0034] Figure 9(a) is a top view of the hinge structure of the horizontal strip (8) and the side vertical strip (9) in the open state;

[0035] Figure 9(b) is a schematic diagram of the first hinge structure on the side edge of the vertical strips on both sides shown in part C of Figure 9(a) in the open state;

[0036] Figure 9(c) is a schematic diagram of the closed state of the first hinge structure at the lower edge of the two vertical strips shown in part C of Figure 9(a);

[0037] Figure 10(a) is a schematic diagram of the disassembled structure of the first hinge structure latch and hinge piece;

[0038] Figure 10(b) is a schematic diagram of the disassembled structure of the second hinge structure latch and hinge piece;

[0039] Figures 11(a) to 11(f) It is Figure 1The diagram illustrates the entire construction process of inserting a cross-shaped radial plastic drainage board into the foundation. In Figure 11(a), the horizontal and vertical hinge structures of the insertion device are open, and the drainage board is inserted into the insertion device to reach the predetermined position. Figure 11(b) is a schematic diagram of the vertical hinge structure being closed. Figure 11(c) is a schematic diagram of the horizontal hinge structure being closed. Figure 11(d) is a schematic diagram of the preparation before removing the insertion device, with the vertical hinge structure opening and then the horizontal hinge structure opening. Figure 11(e) is a schematic diagram of the process of removing the insertion device. Figure 11(f) is a schematic diagram of the drainage board remaining in the soil after the insertion device is removed.

[0040] In the picture:

[0041] 1-Vertical plastic drainage board 2-Horizontal plastic drainage board

[0042] 3-Vertical drainage plate of wing 4-Rivet

[0043] 5-Short nail 6-Horizontal through hole

[0044] 7-Middle vertical strip 8-Horizontal strip

[0045] 9-side vertical slats 10-front panel

[0046] 11-Rear Plate 100-Upper Unit

[0047] 200-Bottom Unit 201-Vertical Plastic Drainage Board Bottom Structure

[0048] 101 - Middle vertical slat side hinge latch; 102 - Horizontal slat hinge structure latch

[0049] 103 - Side vertical slat upper or lower latch; 104 - Middle vertical slat hinge end triangular piece

[0050] 105 - Side vertical slat hinge piece; 106 - Upper or lower outer side hinge piece of horizontal slat.

[0051] 107 - Upper or lower hinge on the inner side of the horizontal slat; 108 - Side hinge on the middle vertical slat.

[0052] 109 - Bottom unit middle vertical slat bottom hinge; 110 - Side vertical slat upper or lower hinge.

[0053] 111 - First hinge structure on the upper or lower part of the side vertical strip; 112 - First hinge structure at the bottom of the middle vertical strip.

[0054] 113-Side vertical slat side first hinge structure; 114-Middle vertical slat side first hinge structure

[0055] 115 - First hinge structure on the upper or lower part of the outer side of the crossbar; 116 - First hinge structure on the upper or lower part of the inner side of the crossbar.

[0056] 117-End plate of horizontal strip Detailed Implementation

[0057] This invention proposes a design concept for a cross-shaped radial plastic drainage board: based on a traditional vertical plastic drainage board, a series of horizontally radiating cross-shaped plastic drainage boards extend vertically at intervals. The effective influence range of its vacuum pressure is greater than that of the vertical and linear radial plastic drainage boards, as shown in Figures 3(a), 3(b), and 3(c). This cross-shaped radial drainage board can largely solve the problem of vacuum attenuation along the vertical and radial directions in soil, thereby increasing the effective influence range of the plastic drainage board, improving the foundation consolidation rate, expanding the foundation reinforcement range, and greatly improving the efficiency and effectiveness of vacuum preloading treatment of foundations. This invention not only designs a novel cross-shaped radial plastic drainage board, but also utilizes a specially designed insert device to insert the cross-shaped radial plastic drainage board into the soft soil foundation requiring vacuum preloading treatment in one go. The shape of the insert device is consistent with the shape of the cross-shaped radial plastic drainage board and slightly larger than it, as long as it completely encloses the cross-shaped radial plastic drainage board. In this invention, the construction method mainly includes: inserting a cross-shaped radial plastic drainage board into an insert device; inserting the insert device and the drainage board into the soft soil foundation; and pulling the insert device out of the soft soil foundation. The insert device has a hinge structure at the outer edges of its front and rear plates that can open and close. When inserted, the hinge structure closes to ensure the sealing of the insert device's interior and prevent external soil from entering. When the insert device is pulled out, the hinge structure opens to prevent the plastic drainage board from being pulled out or cut off during extraction. Furthermore, the lower part of the cross-shaped radial plastic drainage board has a curved hole structure and fixing rivets to fix the plastic drainage board in the soil, preventing it from being pulled out or bent when the insert device is removed, thus ensuring that the cross-shaped radial plastic drainage board is in the pre-designed position within the soft soil foundation.

[0058] The present invention will be further described below with reference to the accompanying drawings and specific embodiments, but the following embodiments are by no means intended to limit the present invention.

[0059] like Figure 1 As shown, the present invention proposes a cross-shaped radial plastic drainage board, comprising a vertical plastic drainage board 1, on which N equidistant horizontal plastic drainage boards 2 are provided along the length direction. Each horizontal plastic drainage board 2 has wing-shaped vertical drainage boards 3 arranged symmetrically with the horizontal plastic drainage boards 2 on both sides, intersecting in a cross shape. The bottom edge of the vertical plastic drainage board 1 has a horizontal through hole 6 formed by bending and fixing the board upwards. A rivet 4 is provided in the through hole. Figure 2As shown; the bottom edge of the vertical plastic drainage board 1 is bent upward and fixed with several short nails 5, the axial length of the rivet 4 is H, the horizontal width of the vertical plastic drainage board 1 is W, and H is greater than W.

[0060] In this invention, the length of the vertical plastic drainage board 1 is L + 2 × L0 + L1, where L0 is the amount by which the bottom edge of the vertical plastic drainage board 1 bends upward, L1 is the amount by which the top of the vertical plastic drainage board 1 extends beyond the top of the wing-shaped vertical drainage board 3 located at the top position, the distance between two adjacent horizontal plastic drainage boards 2 is A, where A = L / N, the length of the wing of the horizontal plastic drainage board 2 is L2, and the length of the wing-shaped vertical drainage board 3 is L3, where L3 is 0.5 to 0.6A and is less than L2.

[0061] The insert plate device proposed in this invention for the construction of the above-mentioned cross-shaped radial plastic drainage board, such as... Figure 4 As shown, the insert plate device includes a bottom unit 200 and N-1 upper units 100 that are sequentially connected in series and welded above the bottom unit 200.

[0062] Both the upper unit 100 and the bottom unit 200 include a main body sleeve. The main body sleeve includes a front plate and a rear plate. The front plate consists of three parallel vertical strips and a horizontal strip running through the three vertical strips. The rear plate has the same shape as the front plate. End plates 117 are connected between the two sides of the front and rear plates, respectively. Figure 5 and Figure 6 As shown, the upper and lower ends of the end plate 117 are symmetrical 90° pointed shapes, so that the two hinges on the upper or lower part of the horizontal strip form a 90° angle when closed; the overall outline of the bottom unit 200 and the upper unit 100 connected in series is a similar shape that is larger than the outline of the area corresponding to length L in the cross-shaped radial plastic drainage board, as long as it can enclose the cross-shaped radial plastic drainage board. That is, the amount by which the overall outline of the bottom unit 200 and the upper unit 100 connected in series is larger than the periphery of the outline of the area corresponding to length L in the cross-shaped radial plastic drainage board is such that after all the hinges in the insert device are closed, the insert device covers the cross-shaped radial plastic drainage board.

[0063] The upper unit 100 has a first hinge structure with a split opening between the edges of the front and rear plates, except for the top and bottom of the middle vertical strip.

[0064] The main body of the bottom unit 200, except for the top of the middle vertical strip, has a double-leaf hinge structure between the edges of the front and rear panels. The hinge structure at the bottom edge of the middle vertical strip is a second hinge structure, and the hinge structures at the other edges are first hinge structures. Figure 5 As shown.

[0065] The first hinge structure has two rectangular hinge pieces, as shown in Figure 10(a), and the second hinge structure has two U-shaped hinge pieces, as shown in Figure 10(b), wherein the U-shaped notch is located on one side adjacent to the other hinge piece, as shown in Figure 10(b). Figure 6 As shown.

[0066] Whether it is the upper unit 100 or the bottom unit 200, when the first hinge structure located at the top and bottom of the vertical and horizontal strips is closed, the two rectangular hinge pieces form a 90° angle; when the first hinge structure located on both sides of the vertical strip is closed, the two rectangular hinge pieces form a 180° angle, as shown in Figure 11(c).

[0067] In the bottom unit 200, after the second hinge structure located on the middle vertical strip bottom plate is closed, the two U-shaped hinge pieces are at 90° and form a rectangular hole between the two hinge pieces, as shown in Figure 7(a). The lateral dimension of the rectangular hole is H1, W < H1 < H, and the width of the rectangular hole is greater than the thickness of the vertical plastic drainage board 1.

[0068] When all the first and second hinge structures are opened, the hinge pieces are either flush with or located outside the front or rear panel, respectively. Figures 9(a) to 9(c) As shown in Figure 11(a).

[0069] The construction process of inserting the cross-shaped radial plastic drainage board of the present invention into the soil using the insert plate device proposed in this invention is as follows: Figures 11(a) to 11(f) As shown, the steps are as follows:

[0070] Step 1) Bend the bottom of the cross-shaped radial plastic drainage board and fix it with a row of short nails 5, then insert the rivets 4 into the formed through holes, as shown. Figure 1 and Figure 2 As shown;

[0071] Step 2) Open all the hinge structures of the insert plate device and insert the cross-shaped radial plastic drainage plate into the insert plate device, as shown in Figure 11(a). When the cross-shaped radial plastic drainage plate is fully installed in the insert plate device and the rivet 4 is located at the lower part of the vertical plastic drainage plate 1, as shown in Figure 11(b), close all the hinges. The rivet 4 is just exposed outside the rectangular hole of the second hinge structure and is attached to the outside of the two hinge pieces of the hinge, as shown in Figure 11(c). At this point, the assembly of the cross-shaped radial plastic drainage plate and the insert plate device is completed.

[0072] Step 3) Erect the inserting device with the cross-shaped radial plastic drainage board, and use the inserting machine to insert the inserting device together with the cross-shaped radial plastic drainage board into the soft soil foundation.

[0073] Step 4) After the insert plate device with the cross-shaped radial plastic drainage board is inserted to the designed depth, open all the hinges of the insert plate device as shown in Figure 11(d), and then pull out the insert plate device as shown in Figure 11(e). The cross-shaped radial plastic drainage board is left at the designed depth and position as shown in Figure 11(f).

[0074] Step 5) Repeat steps 1 to 4 above to install the next cross-shaped radial plastic drainage board until all cross-shaped radial plastic drainage boards in the site are installed.

[0075] Example:

[0076] In this embodiment, the vertical plastic drainage board 1 has a width of 100mm, a thickness of 4mm, and a length determined according to the foundation treatment depth. The horizontal plastic drainage board 2 has a length of 2060mm, a width of 100mm, and a thickness of 4mm. The wing-type vertical drainage board 3 has a length of 700mm, a width of 100mm, and a thickness of 4mm. The horizontal plastic drainage board 2 and the vertical plastic drainage board 1 are connected by heat fusion welding, and the wing-type vertical drainage board 3 is also connected to the horizontal plastic drainage board 2 by heat fusion welding. The bottom of the vertical plastic drainage board 1 has a curved perforated structure, as shown in the attached figure. Figure 2 As shown, the bottom of the vertical plastic drainage board 1 is first bent, and then the bent part is fixed by a row of short nails 5 to form a horizontal through hole 6. Finally, the rivet 4 is placed in the horizontal through hole 6. When the inserting plate device is inserted downward, the drainage board can be inserted into the soil together by the rivet 4; when the inserting plate device is pulled out, the rivet 4 can fix the drainage board in the soil and prevent the drainage board from being carried out.

[0077] The present invention relates to the manufacture of a cross-shaped radial plastic drainage board: Factory-produced plastic drainage boards are typically long strips, 100mm wide and 4mm thick, with a roll usually ranging from 100 to 200 meters in length. First, vertical plastic drainage boards 1, multiple horizontal plastic drainage boards 2 (2060mm long), and multiple wing-shaped vertical drainage boards 3 (700mm long) are cut according to the foundation treatment depth. Then, the horizontal plastic drainage boards 2 and vertical plastic drainage boards 1 are heat-fused together. Finally, the wing-shaped vertical drainage boards 3 and horizontal plastic drainage boards 2 are also heat-fused together to complete the manufacture of the cross-shaped radial plastic drainage board.

[0078] The insert device of the cross-shaped radial plastic drainage board consists of a bottom unit 200 and multiple identical upper units 100, such as... Figure 4 As shown. Bottom unit 200, as... Figure 6 As shown, the upper unit 100 is as follows Figure 5 As shown. A schematic diagram of the breakdown of the bottom unit 200 is shown below. Figure 4 and Figures 7(a) to 7(d) As shown, the bottom unit 200 consists of the following components: a central vertical slat 7, a horizontal slat 8, a side vertical slat 9, a side hinge latch 101 of the central vertical slat, a hinge structure latch 102 of the horizontal slat, an upper or lower latch 103 of the side vertical slat, a triangular piece 104 at the end of the central vertical slat hinge piece, a side vertical slat hinge piece 105, an upper or lower hinge piece on the outer side of the horizontal slat 106, an upper or lower hinge piece on the inner side of the horizontal slat 107, a side hinge piece on the central vertical slat 108, a bottom hinge piece on the central vertical slat of the bottom unit 109, and an upper or lower hinge piece on the side vertical slat 110. The upper unit 100 is as follows... Figure 5 As shown, it consists of the following components: a middle vertical slat 7, a horizontal slat 8, a side vertical slat 9, a side hinge latch 101 of the middle vertical slat, a hinge structure latch 102 of the horizontal slat, an upper or lower latch 103 of the side vertical slat, a triangular piece 104 at the end of the hinge piece of the middle vertical slat, a hinge piece 105 of the side vertical slat, an upper or lower hinge piece 106 on the outer side of the horizontal slat, an upper or lower hinge piece 107 on the inner side of the horizontal slat, a side hinge piece 108 of the middle vertical slat, and an upper or lower hinge piece 110 of the side vertical slat. It can be seen that the difference between the upper unit 100 and the bottom unit 200 is that the lower hinge piece 109 of the middle vertical slat is missing.

[0079] In this embodiment, the shape of the insert device is consistent with the shape of the cross-shaped radial plastic drainage board 1. The length of the middle vertical strip 7 is 1400mm, the width is 120mm, and the thickness is 10mm; the length of the horizontal strip 8 is 2120mm, the width is 100mm, and the thickness is 10mm; and the length of the side vertical strip 9 is 700mm, the width is 120mm, and the thickness is 10mm. The length of the side hinge latch 101 of the middle vertical slat is 100mm and the diameter is 2mm; the length of the horizontal slat hinge structure latch 102 is 100mm and the diameter is 2mm; the length of the upper or lower latch 103 of the side vertical slat is 20mm and the diameter is 2mm; the triangular piece 104 at the end of the middle vertical slat hinge piece is an isosceles right triangle with a right angle side length of 5mm and a thickness of 1mm; the length of the side vertical slat hinge piece 105 is 300mm and the width is 7mm and the thickness is 1mm; the length of the outer hinge piece 106 of the horizontal slat is 400mm and the width is 7mm. The length of the upper or lower hinge 107 on the inner side of the horizontal strip is 480mm, the width is 7mm, and the thickness is 1mm; the length of the side hinge 108 on the middle vertical strip is 1000mm, the width is 5mm, and the thickness is 1mm; the length of the bottom hinge 109 on the middle vertical strip of the bottom unit is 120mm, the width is 7mm, and the thickness is 1mm, of which the length of the open part is 100mm and the width is 5mm; the length of the upper or lower hinge 110 on the side vertical strip is 120mm, the width is 7mm, and the thickness is 1mm.

[0080] The structures of each upper unit 100 are completely identical. The difference between the bottom unit 200 and the upper unit 100 is that a first hinge structure 112 is added to the bottom of the middle vertical slat 7. Figure 5 and Figure 6 As shown. The following is a detailed description of each component, using the bottom unit 200 as an example. Figures 7(a) to 7(d)As shown, the side hinge latch 101 of the middle vertical slat is welded to the side of the middle vertical slat 7 and the side vertical slat 9, for connecting the side hinge piece 108 and the side vertical slat hinge piece 105 of the middle vertical slat; the horizontal slat hinge structure latch 102 is welded to the upper and lower parts of the horizontal slat 8, for connecting the upper or lower hinge piece 106 on the outer side of the horizontal slat and the upper or lower hinge piece 107 on the inner side of the horizontal slat; the upper or lower latch 103 of the side vertical slat is welded to the upper and lower parts of the side vertical slat 9 and the bottom of the middle vertical slat 7, for connecting the upper or lower hinge piece of the side vertical slat. The hinge 109 is located at the bottom of the middle vertical slat of the bottom unit. The triangular piece 104 at the end of the hinge 104 is welded to the end of the side hinge 108 of the middle vertical slat and the end of the side vertical slat hinge 105 to ensure the closure of the vertical slat 7 and the side vertical slat 9. Figure 8(a) shows a right view of the first hinge structure at the edge of the side vertical slat when closed. Figure 8(b) shows an enlarged view of the part shown in section B of Figure 8(a). Figure 8(c) shows the hinge structure shown in section B of Figure 8(a) in the open state.

[0081] The upper or lower hinge piece 106 on the outer side of the horizontal strip is combined with the hinge structure latch 102 of the horizontal strip to form the first hinge structure 115 on the upper or lower part of the outer side of the horizontal strip. The upper or lower hinge piece 106 on the outer side of the horizontal strip can rotate around the hinge structure latch 102 of the horizontal strip to close or open the first hinge structure 115 on the upper or lower part of the outer side of the horizontal strip. It closes during the insertion process of the insert device to ensure its sealing, and opens during the removal process of the insert device to ensure that the drain plate is not pulled out. The upper or lower hinge piece 107 on the inner side of the horizontal strip is combined with the hinge structure latch 102 of the horizontal strip to form the first hinge structure 116 on the upper or lower part of the inner side of the horizontal strip. The upper or lower hinge piece 106 on the outer side of the horizontal strip can rotate around the hinge structure latch 102 of the horizontal strip to close or open the first hinge structure 116 on the upper or lower part of the inner side of the horizontal strip. It closes during the insertion of the insert device to ensure its sealing, and opens during the removal of the insert device to ensure that the drain plate is not pulled out.

[0082] The side vertical slat hinge piece 105 and the middle vertical slat side hinge latch 101 combine to form the side vertical slat first hinge structure 113. The side vertical slat hinge piece 105 can rotate around the middle vertical slat side hinge latch 101, causing the side vertical slat first hinge structure 113 to close or open. It closes during the insertion of the insert plate device and opens during the removal of the insert plate device. The middle vertical slat side hinge piece 108 and the middle vertical slat side hinge latch 101 combine to form the middle vertical slat first hinge structure 114. The middle vertical slat side hinge piece 108 can rotate around the middle vertical slat side hinge latch 101, causing the middle vertical slat first hinge structure 114 to close or open. It closes during the insertion of the insert plate device and opens during the removal of the insert plate device. Figure 9(a) is a top view of the hinge structure of the horizontal strip 8 and the side vertical strip 9 in the open state; Figure 9(b) shows a partial enlarged view of part C in Figure 9(a); Figure 9(c) shows the closed state of the first hinge structure at the lower edge of the two vertical strips shown in part C of Figure 9(a).

[0083] In this invention, all components of the insert plate device are made of steel.

[0084] As shown in Figure 7(a) and Figure 6 As shown, the bottom hinge piece 109 of the middle vertical slat of the bottom unit is combined with the upper or lower latch 103 of the side vertical slat to form the first hinge structure 112 at the bottom of the middle vertical slat. The bottom hinge piece 109 of the middle vertical slat of the bottom unit can rotate around the upper or lower latch 103 of the side vertical slat to close or open the first hinge structure 112 at the bottom of the middle vertical slat. It closes during the insertion of the insert plate device and opens during the removal of the insert plate device. The upper or lower hinge piece 110 of the side vertical strip is combined with the upper or lower latch 103 of the side vertical strip to form the first hinge structure 111 of the side vertical strip. The upper or lower hinge piece 110 of the side vertical strip can rotate around the upper or lower latch 103 of the side vertical strip to close or open the first hinge structure 111 of the side vertical strip. It closes during the insertion of the insert device to ensure its sealing, and opens when the insert device is pulled out to ensure that the drain plate is not pulled out.

[0085] In this invention, the opening and closing of the hinge structure can be achieved in various structural forms, which are not limited in this invention. An electromechanical combination can be adopted. For example, a spring drive structure is provided at the connection between the hinge structure and the insertion and removal device. The hinge is in the open state under the action of the spring force. When the hinge structure is closed, the spring drive device can be blocked by a baffle. After insertion is completed, the baffle is opened, and the hinge structure will open again under the action of the spring force. Then the insertion and removal device can be pulled out.

[0086] The construction process of the cross-shaped radial plastic drainage board is as follows:

[0087] The cross-shaped radial plastic drainage board of the present invention is installed into the insert plate device. For example... Figure 5 , Figure 6 As shown in Figures 11(a) and 11(b), the first hinge structure 114 on the side of the middle vertical strip 7 of each upper unit 100 on the insert plate device is opened; the first hinge structure 114 on the side of the middle vertical strip 7 of the bottom unit 10 and the first hinge structure 112 at the bottom of the middle vertical strip are opened; the first hinge structure 115 on the outer side or lower side of the horizontal strip 8 of each upper unit 11 and bottom unit 10 and the first hinge structure 116 on the inner side of the horizontal strip are opened; the first hinge structure 111 on the side vertical strip 9 of each upper unit 100 and bottom unit 200 and the first hinge structure 113 on the side vertical strip are opened. The cross-shaped radial plastic drainage board is inserted into the insert plate device from top to bottom. After insertion, the bottom of the cross-shaped radial plastic drainage board is bent, and then the bent part is fixed by a row of short nails 5. Finally, the rivet 4 is inserted into the transverse through hole 6 formed by the bent hole. When each hinge structure is closed, the bottom ends of the two hinge pieces intersect and join together. When the first hinge structure 111 on the upper or lower part of the side vertical strip, the first hinge structure 112 at the bottom of the middle vertical strip, the first hinge structure 115 on the outer side of the horizontal strip, and the first hinge structure 116 on the inner side of the horizontal strip are closed, the two hinge pieces form a wedge structure with a certain included angle, which helps the insert plate device to penetrate. When the first hinge structure 113 on the side of the side vertical strip and the first hinge structure 114 on the side of the middle vertical strip are closed, the two hinge pieces are on the same plane. The ends of the first hinge structures 113 and 114 are provided with triangular pieces 104, which can just close the triangular notches at both ends of the hinge structures 111 and 112. When each hinge structure is opened, the two hinge pieces are parallel to the surfaces of the front and rear plates of the insert plate device, respectively.

[0088] The insert plate device, along with the drainage plate, is inserted into the soft soil foundation. For example... Figure 5 , Figure 6As shown in Figure 11(c), when the insert plate device is inserted downwards, the hinge structures close, allowing the insert plate device to completely enclose the drainage board, preventing surrounding soil from entering the insert plate device and causing the drainage board to be difficult to penetrate or bend. When the insert plate device is pulled upwards, the hinge structures open, allowing the insert plate device to completely detach from the drainage board, preventing the insert plate device from pulling out or cutting the drainage board when pulled upwards. The closing and opening of the hinge structure can be controlled by the latch and hinge plates. The first hinge structure 114 on the side of the middle vertical strip 7 of each upper unit 100 on the insert plate device is closed; the first hinge structure 114 on the side of the middle vertical strip 7 of the bottom unit 200 and the first hinge structure 112 at the bottom of the middle vertical strip are closed; the first hinge structure 115 on the outer side or lower side of the horizontal strip 8 of each upper unit 100 and bottom unit 200 and the first hinge structure 116 on the inner side of the horizontal strip are closed; the first hinge structure 111 on the side vertical strip 9 of each upper unit 100 and bottom unit 200 and the first hinge structure 113 on the side vertical strip are closed. At this time, the triangular steel pieces 104 at the ends of the side hinge pieces 108 and 105 of the middle vertical strip are also in a closed state, and the end plates 117 of the horizontal strip 8 are also in a closed state. Therefore, the entire insert plate device completely encloses and seals the cross-shaped radial plastic drainage board. Then, the insert plate device and drainage board are gradually inserted into the soft soil foundation using an insert plate machine. During the penetration process, the insert plate device completely isolates the cross-shaped radial plastic drainage board from the surrounding soil to prevent the surrounding soil from entering the insert plate device, causing the drainage board to be difficult to penetrate or bend. In addition, when closed, the first hinge structure 111 on the upper or lower part of the side vertical strip, the first hinge structure 112 at the bottom of the middle vertical strip, the first hinge structure 115 on the outer side of the horizontal strip, and the first hinge structure 116 on the inner side of the horizontal strip form a wedge-shaped structure with a certain included angle. The wedge-shaped structure can greatly reduce the penetration force for inserting the insert plate device into the foundation.

[0089] Pull the insert plate device out of the soft soil foundation. For example... Figure 5 , Figure 6As shown in Figure 11(d), after the insert plate device and drainage board have penetrated to the designed depth, the insert plate device is pulled out of the soft soil foundation. Open the first hinge structure 114 on the side of the middle vertical strip 7 of each upper unit 100 on the insert plate device; open the first hinge structure 114 on the side of the middle vertical strip 7 of the bottom unit 10 and the first hinge structure 112 at the bottom of the middle vertical strip; open the first hinge structure 115 on the outer side or lower side of the horizontal strip 8 of each upper unit 11 and bottom unit 10 and the first hinge structure 116 on the inner side of the horizontal strip; open the first hinge structure 111 on the side vertical strip 9 of each upper unit 100 and bottom unit 200 and the first hinge structure 113 on the side vertical strip. At this time, the triangular steel plates 104 at the ends of the side hinges 108 and 105 of the middle vertical slats are also in the open state. Therefore, the insert plate device is completely separated from the drainage board. Then, the insert plate device is gradually pulled out of the soft soil foundation using the insert plate machine. At this time, the insert plate device is completely separated from the drainage board to prevent the drainage board from being pulled out or cut off when the insert plate device is pulled upward.

[0090] The drainage board is fixed in the soil, completing the construction of the cross-shaped radial plastic drainage board. When the insert device is pulled upwards, the bottom rivet 4 of the drainage board secures it in the soil, as shown in Figure 11(f). This prevents the drainage board from being pulled out along with the insert device or from bending, ensuring the cross-shaped radial plastic drainage board is in the pre-designed position in the soft soil foundation. After the insert device is completely pulled out, the cross-shaped radial plastic drainage board remains in the pre-designed position in the soft soil foundation, thus completing the construction of one cross-shaped radial plastic drainage board. Repeating the steps of "drainage board inserted into the insert device—insertion of the insert device with the drainage board into the soft soil foundation—pulling the insert device out of the soft soil foundation—fixing the drainage board in the soil" completes the laying of all cross-shaped radial plastic drainage boards on the site.

[0091] Although the present invention has been described above in conjunction with the accompanying drawings, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many improvements and modifications under the guidance of the present invention without departing from the spirit of the present invention, such as changing the shape of the radiant plastic drainage board, the specific structure of the insert device, etc., and these are all within the protection scope of the present invention.

Claims

1. A plate inserting device for a cross-shaped radial plastic drainage board, the cross-shaped radial plastic drainage board comprising a vertical plastic drainage board (1), wherein N equidistant horizontal plastic drainage boards (2) are provided on the vertical plastic drainage board (1) along its length direction, and each horizontal plastic drainage board (2) has wing vertical drainage boards (3) on both sides intersecting the horizontal plastic drainage boards (2) and arranged symmetrically, and the bottom edge of the vertical plastic drainage board (1) has a horizontal through hole (6) formed by bending and fixing the board upward, and a rivet (4) is provided in the through hole; characterized in that, The insert device includes a bottom unit (200) and N-1 upper units (100) that are sequentially connected in series and welded above the bottom unit (200); Both the upper unit (100) and the bottom unit (200) include a main body sleeve, which includes a front plate and a rear plate. The front plate consists of three parallel vertical strips and a horizontal strip that runs through the three vertical strips. The shape of the rear plate is the same as that of the front plate. End plates (117) are connected between the two sides of the front plate and the rear plate. The overall outline of the bottom unit (200) and the upper unit (100) connected in series is a similar shape to the area outline corresponding to length L in the cross-shaped radial plastic drainage board. The upper unit (100) has a split-type first hinge structure between the edges of the front and rear plates, except for the top and bottom of the vertical strip in the middle. The main body of the bottom unit (200) is provided with a split hinge structure between the edges of the front and rear plates, except for the top of the vertical strip in the middle. The hinge structure at the bottom edge of the vertical strip in the middle is the second hinge structure, and the hinge structures at the other edges are the first hinge structures. The first hinge structure has two rectangular hinge pieces, and the second hinge structure has two concave hinge pieces, wherein the concave notch is located on one side adjacent to the other hinge piece; When the first hinge structure located at the top and bottom of the vertical and horizontal slats is closed, the two rectangular hinge pieces form a 90° angle. When the first hinge structure located on both sides of the vertical strip is closed, the two rectangular hinge pieces are at 180°. In the bottom unit (200), after the second hinge structure of the vertical strip bottom plate in the middle is closed, the two concave hinge pieces are at 90° and a rectangular hole is formed between the two hinge pieces. The horizontal dimension of the rectangular hole is H1, W < H1 < H, and the width of the rectangular hole is greater than the thickness of the vertical plastic drainage board (1). When all the first and second hinge structures are opened, the hinge pieces are either flush with or located outside the front or rear panel, respectively.

2. The insert plate device according to claim 1, characterized in that, The length of the vertical plastic drainage board (1) is L+2×L0+L1, where L0 is the amount by which the bottom edge of the vertical plastic drainage board (1) bends upward, and L1 is the amount by which the top of the vertical plastic drainage board (1) extends beyond the top of the wing vertical drainage board (3) located at the top position. The distance between two adjacent horizontal plastic drainage boards (2) is A, where A = L / N. The length of the wing of the horizontal plastic drainage board (2) is L2, and the length of the wing vertical drainage board (3) is L3, where L3 is 0.5~0.6A and less than L2.

3. The insert plate device according to claim 1, characterized in that, The bottom edge of the vertical plastic drainage board (1) is bent upward and fixed with several short nails (5). The axial length of the rivet (4) is H, and the lateral width of the vertical plastic drainage board (1) is W. H is greater than W.

4. The insert plate device according to claim 1, characterized in that, The amount by which the overall outline of the bottom unit (200) and the upper unit (100) connected in series exceeds the periphery of the outline of the area corresponding to length L in the cross-shaped radial plastic drainage board is such that the insert plate device covers the cross-shaped radial plastic drainage board after all the hinges in the insert plate device are closed.

5. A construction method for a cross-shaped radial plastic drainage board, characterized in that, Using the insert plate device as described in any one of claims 1 to 4, and following these steps: Step 1) Bend the bottom of the cross-shaped radial plastic drainage board and fix it with a row of short nails (5), then insert the rivets (4) into the formed through holes; Step 2) Open all the hinge structures of the insert plate device, insert the cross-shaped radial plastic drainage plate into the insert plate device. When the cross-shaped radial plastic drainage plate is fully installed in the insert plate device and the rivet (4) is located at the lower part of the vertical plastic drainage plate (1), close all the hinges. The rivet (4) is just exposed outside the rectangular hole of the second hinge structure and is attached to the outside of the two hinge pieces of the hinge. Thus, the assembly of the cross-shaped radial plastic drainage plate and the insert plate device is completed. Step 3) Erect the inserting device with the cross-shaped radial plastic drainage board, and use the inserting machine to insert the inserting device together with the cross-shaped radial plastic drainage board into the soft soil foundation. Step 4) After the insert plate device with the cross-shaped radial plastic drainage board has been inserted to the designed depth, open all the hinges of the insert plate device, and then pull out the insert plate device, leaving the cross-shaped radial plastic drainage board at the designed depth and position. Step 5) Repeat steps 1 to 4 above to install the next cross-shaped radial plastic drainage board until all cross-shaped radial plastic drainage boards in the site are installed.

Images