A soft soil subgrade reinforcing device

Abstract

The application discloses a soft soil roadbed reinforcing device, relates to the technical field of road support, and comprises a first support plate and a second support plate, the second support plate is detachably installed on the top of the first support plate, further comprises a reinforcing pile, the side edge of the first support plate is provided with a clamp, the reinforcing pile comprises a pile shell, a pile cover, a moving plate, a barb and a driving column, a plurality of flexible branches are installed on the end of the barb away from the moving plate, the included angle between the barb axis and the flexible branch axis increases step by step in the upward direction, and the length of the flexible branch increases step by step in the upward direction, the short flexible branch with small angle of the upper layer is penetrated through the hard shell layer according to the characteristics of the soft soil roadbed with high humidity, and the pile body is prevented from sliding; the flexible branch of the middle layer increases the friction area of the soil body, the flexible branch of the lower side is long and has a large angle, the length and angle of the flexible branch are matched with the humidity change in layers, and the anchoring performance in the soft soil roadbed with high humidity is remarkably improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of road support, in particular to a soft soil subgrade reinforcing device. BACKGROUND

[0002] The subgrade is the foundation building under the railway track or road surface, and is a strip structure built according to the route position and certain technical requirements as the foundation of the road surface, and is the foundation of the railway and highway. With the development of society, the number of cars is increasing day by day, and the bearing capacity of the subgrade has higher and higher rigid requirements. Nowadays, roads are being repaired everywhere, and some soft soil sections are often encountered. For these sections, reinforcing devices must be used to meet the requirements of vehicle driving, otherwise the soft road section is easy to collapse or sink downward, causing uneven road surface.

[0003] The prior art discloses a soft soil subgrade reinforcing device in Chinese patent application No. CN113481776A, which comprises a first support plate horizontally arranged on the surface of the soft soil subgrade, a pair of vertical reinforcing piles detachably arranged on the first support plate, the bottom of the reinforcing pile is inserted into the soft soil subgrade, and the top is detachably connected with the first support plate; a second support plate in the shape of an arch is arranged above the first support plate and is detachably connected with the first support plate; a reinforcing plate is a pair of reinforcing plates, a length-adjustable connecting rod is arranged between the pair of reinforcing plates, the bottom of the pair of reinforcing plates is detachably connected with the second support plate, and the top of the pair of reinforcing plates extends upward and towards each other. The soft soil subgrade reinforcing device has the advantages of convenient assembly and good support effect.

[0004] However, in the face of some high-humidity soft soil subgrade, the soil inside is relatively high in humidity, and as the depth of the soil increases, the soil becomes softer and wetter. On this basis, only the reinforcing pile and the barbs in the reinforcing pile may not be able to be fixed in the soil, causing the position of the first support plate to deviate, eventually causing the road surface to collapse or be uneven. SUMMARY

[0005] The soft soil subgrade reinforcing device provided by the embodiments of the present application solves the problem that only the reinforcing pile and the barbs in the reinforcing pile in the prior art may not be able to be fixed in the high-humidity soil, causing the position of the first support plate to deviate, eventually causing the road surface to collapse or be uneven.

[0006] The embodiment of the application provides a soft soil roadbed reinforcing device, which comprises a first supporting plate and a second supporting plate, the first supporting plate is in the shape of a cuboid, the second supporting plate is in the shape of an arch, and the second supporting plate is detachably arranged on the top of the first supporting plate, further comprising reinforcing piles, the side edges of the first supporting plate are provided with clamps, the clamps can lock and fix the reinforcing piles, the reinforcing pile comprises a pile shell, a pile cover, a moving plate, barbs and a driving column, the pile shell is hollow inside and is provided with an opening at the top, the pile cover is fixedly connected with the top of the pile shell through screw threads, the moving plate is slidably arranged in the pile shell, the barbs are fixed on the moving plate, and the barbs on the moving plate are divided into three layers from top to bottom, a through hole for the barbs to move is formed in the side wall of the pile shell, the driving column is slidably arranged in the pile shell and is located on the upper side of the moving plate, the driving column is in the shape of a cone with a wide upper part and a narrow lower part, the driving column can extrude the moving plate from the upper part when moving downward, the moving plate is spread in the pile shell, and the barbs can pass through the through hole, the end of the barb away from the moving plate is provided with a plurality of flexible branches, and the included angle between the axis of the flexible branch and the axis of the barb gradually increases from top to bottom, and the length of the flexible branch gradually increases from top to bottom.

[0007] Further, the length of the barb of the upper layer is 8-10 cm, the length of the flexible branch is 3 cm, and the included angle between the axis of the flexible branch and the axis of the barb is 20 degrees; the length of the barb of the middle layer is 12-15 cm, the length of the flexible branch is 5 cm, and the included angle between the axis of the flexible branch and the axis of the barb is 40 degrees; the length of the barb of the lower layer is 15-20 cm, the length of the flexible branch is 8 cm, and the included angle between the axis of the flexible branch and the axis of the barb is 50 degrees.

[0008] Further, the elastic net is arranged between the adjacent two flexible branches of each barb, and the elastic coefficient of the elastic net arranged on the barbs of the upper, middle and lower layers gradually decreases from top to bottom.

[0009] Further, the elastic net arranged on the flexible branch of the barb of the upper layer is in the shape of a rhombic grid, the elastic net arranged on the flexible branch of the barb of the middle layer is in the shape of a hexagonal honeycomb grid, and the elastic net arranged on the flexible branch of the barb of the lower layer is in the shape of a radial pattern.

[0010] Further, the flexible branches of the barb of the middle layer form double-layer elastic nets, and the flexible branches of the barb of the lower layer form three-layer elastic nets.

[0011] Further, the double-layer elastic nets formed between the flexible branches of the barb of the middle layer are filled with silicon dioxide powder, and the three-layer elastic nets formed between the flexible branches of the barb of the lower layer are filled with silicon dioxide particles.

[0012] Further, two reinforcing plates are symmetrically installed on the second support plate, a length-adjustable connecting rod is installed between the two reinforcing plates, a support rod is installed between each of the reinforcing plates and the first support plate, one end of the support rod is hinged to the first support plate, and the other end of the support rod is fixedly connected to the reinforcing plate.

[0013] The one or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages:

[0014] Firstly, the present application penetrates the hard shell layer by the short and small-angle flexible branch in the upper layer to avoid the pile body sliding; the flexible branch in the middle layer increases the friction area of the soil body, and the flexible branch with long and large angle in the lower layer improves the uplift resistance; the length and angle of the flexible branch are matched with the humidity change in layers, which significantly improves the anchoring performance in the high-humidity soft soil subgrade and optimizes the reinforcement effect on the soft soil subgrade;

[0015] Secondly, the present application embeds the elastic net in the upper layer in the form of a rhombus grid into the crack of the hard shell layer of the soft soil subgrade, resists the cracking of the hard shell layer, and reduces the risk of local crushing of the hard shell layer; the elastic net in the middle layer is in the form of a hexagonal honeycomb grid, which wraps around the softening soil body, captures soil particles, improves friction resistance, and constrains the lateral displacement of the softening soil body; the elastic net in the lower layer reduces the drag force of the flowing soil body, anchors the flowing soil body, and realizes three-dimensional anchoring, so that the device can be applied to similar high-humidity scenes such as marshes and river bank slopes, and has engineering universality;

[0016] Thirdly, the number of layers of the elastic net increases with the depth, matching the mechanical gradient of the soil body from "hard-soft-flow", the double-layer elastic net in the middle layer forms a "sandwich structure" to capture soil particles, further improve the friction resistance, and improve the anti-cracking, friction-increasing and anti-flowing ability of the soil;

[0017] Fourthly, the silicon dioxide powder in the middle layer forms a silicon gel after absorbing water from the soil, the silicon gel fills the soil pores, improves the cohesion of the soil in the middle layer, the gel layer blocks the upward infiltration of water, reduces the softening risk of the surface hard shell layer; the silicon dioxide particles in the lower layer swell to twice the original volume after absorbing water, extruding the soil body and filling the gap between the nets, forming a dense mass, the radial pressure generated by the particle swelling improves the anchoring force of the lower layer, the porous structure adsorbs free water, accelerates the soil body consolidation, reduces the settlement rate, the water absorption material reduces the free water content of the soil body, inhibits the development of the plastic state, and improves the long-term stability. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a schematic diagram of the three-dimensional structure of the present application;

[0019] Figure 2 The sectional view of the first working state of the reinforcing pile of the present application;

[0020] Figure 3 The sectional view of the second working state of the reinforcing pile of the present application; Figure 2 The enlarged view of A in the middle;

[0021] Figure 4 The sectional view of the second working state of the reinforcing pile of the present application;

[0022] Figure 5 The three-dimensional structural schematic diagram of the upper, middle and lower layers of barbs of the present application;

[0023] Figure 6 The three-dimensional structural schematic diagram of the barbs in the second embodiment of the present application;

[0024] Figure 7 The three-dimensional structural schematic diagram of the upper, middle and lower layers of barbs in the third embodiment of the present application.

[0025] In the figure: 100, first support plate; 110, clamp; 120, second support plate; 130, reinforcing pile; 131, pile shell; 132, pile cover; 133, moving plate; 134, barb; 135, driving column; 136, through hole; 140, reinforcing plate; 150, connecting rod; 160, support rod; 200, flexible branch; 210, elastic net. DETAILED DESCRIPTION

[0026] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings, in which preferred embodiments of the present application are shown; however, the present application can be implemented in many different forms and is not limited to the embodiments described herein; on the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0027] It should be noted that the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiment.

[0028] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the present application belongs; the terms used herein in the specification of the present application are only for the purpose of describing the specific embodiments and are not intended to limit the present application; the term "and / or" used herein includes any and all combinations of one or more related listed items.

[0029] Embodiment one, as Figures 1-5As shown, the embodiment of the present application provides a soft soil subgrade reinforcing device, which comprises a first support plate 100 and a second support plate 120, the first support plate 100 is a cuboid, the second support plate 120 is an arch, and the second support plate 120 is detachably mounted on the top of the first support plate 100, further comprising a reinforcing pile 130, the side of the first support plate 100 is provided with a clamp 110, the clamp 110 can lock and fix the reinforcing pile 130, the reinforcing pile 130 comprises a pile shell 131, a pile cover 132, a moving plate 133, a barb 134 and a driving column 135, the pile shell 131 is hollow inside and has an opening at the top, the pile cover 132 is fixedly connected with the top of the pile shell 131 through threads, the moving plate 133 is slidingly installed inside the pile shell 131, the barb 134 is fixed on the moving plate 133, and the barbs 134 on the moving plate 133 are divided into three layers from top to bottom, and a through hole 136 for the movement of the barb 134 is further formed in the side wall of the pile shell 131, the driving column 135 is slidingly installed inside the pile shell 131 and located on the upper side of the moving plate 133, the driving column 135 is a cone with a wide upper part and a narrow lower part, and when the driving column 135 moves downward, the moving plate 133 can be driven to displace and make the barb 134 pass through the through hole 136, and a plurality of flexible branches 200 are installed on the end of the barb 134 away from the moving plate 133, and the included angle between the axis of the barb 134 and the axis of the flexible branch 200 gradually increases from top to bottom, and the length of the flexible branch 200 gradually increases from top to bottom.

[0030] In use, first, a groove is dug on the construction ground, then the reinforcing pile 130 is pressed to make the reinforcing pile 130 penetrate into the bottom of the groove, then the pile cover 132 is opened, the driving column 135 is moved downward by external force (the driving column 135 can be moved and its position can be locked by filling soil and pressing), the driving column 135 moves downward to drive the moving plate 133 to move until the barb 134 extends out of the through hole 136 and inserts into the soft soil, then the first support plate 100 is placed on the bottom of the groove, the first support plate 100 and the reinforcing pile 130 are connected and fixed by the clamp 110, the second support plate 120 is installed on the top of the first support plate 100, then the subgrade material is filled between the second support plate 120 and the first support plate 100 and is rammed, then the groove is filled and rammed, the installation of the reinforcing device is completed, and when facing long road construction, the above steps can be repeated in sequence.

[0031] Preferably, the length of the barb 134 of the upper layer is 8-10 cm, the length of the flexible branch 200 is 3 cm, and the angle between the axis of the flexible branch 200 and the axis of the barb 134 is 20 degrees; the length of the barb 134 of the middle layer is 12-15 cm, the length of the flexible branch 200 is 5 cm, and the angle between the axis of the flexible branch 200 and the axis of the barb 134 is 40 degrees; the length of the barb 134 of the lower layer is 15-20 cm, the length of the flexible branch 200 is 8 cm, and the angle between the axis of the flexible branch 200 and the axis of the barb 134 is 50 degrees.

[0032] Preferably, two reinforcing plates 140 are symmetrically installed on the second support plate 120, a length-adjustable connecting rod 150 is installed between the two reinforcing plates 140, a support rod 160 is installed between each reinforcing plate 140 and the first support plate 100, one end of the support rod 160 is hingedly connected to the first support plate 100, and the other end of the support rod 160 is fixedly connected to the reinforcing plate 140. The reinforcing plate 140 can strengthen the support of the second support plate 120 and improve the structural strength. The gap between the two reinforcing plates 140 is adjustable to adjust the support strength.

[0033] The application also provides a method for using the soft soil subgrade processing device, which comprises the following steps:

[0034] S1, digging a groove at the construction site and leveling and tamping the groove bottom;

[0035] S2, lowering the reinforcing pile 130 to vertically insert the bottom of the reinforcing pile 130 into the tamped soft soil subgrade, then pressing the reinforcing pile 130 to make the reinforcing pile 130 penetrate into the groove bottom, then opening the pile cover 132, and moving the driving column 135 downward by external force, so that the driving column 135 moves the moving plate 133 until the barb 134 extends out of the through hole 136 and inserts into the soft soil, then lowering the first support plate 100 to fixedly connect the reinforcing pile 130 and the first support plate 100 through the clamp 110, and then placing the second support plate 120 on the first support plate 100 and connecting the second support plate 120;

[0036] S3, adding soft soil subgrade material in the gap between the first support plate 100 and the second support plate 120 and tamping

[0037] S4, according to the length of the road construction, and according to steps one, two and three, sequentially repeating the placement of multiple first support plates 100 and second support plates 120, and making the tail end of the front first support plate 100 correspond to the head end of the rear first support plate 100, and the tail end of the front second support plate 120 correspond to the head end of the rear second support plate 120.

[0038] S6, add the cushion material or the roadbed material to the road surface between each pair of reinforcing plates 140 to the same height as the reinforcing plates 140, fill the other gaps in the groove with soft soil roadbed material, and then lay the road surface on the cushion material.

[0039] The technical solutions in the embodiments of the application have at least the following technical effects or advantages:

[0040] By taking into account the characteristics of the soft soil roadbed with high humidity, the upper layer of short and small-angle flexible branches 200 penetrates the hard shell layer to avoid pile body sliding, the middle layer of flexible branches 200 increases the friction area of the soil body, and the lower layer of long and large-angle flexible branches 200 improves the uplift resistance, and the length and angle of the flexible branches 200 are matched with the humidity change in layers, which significantly improves the anchoring performance in the soft soil roadbed with high humidity and optimizes the reinforcement effect on the soft soil roadbed.

[0041] In order to further improve the anchoring effect of the reinforcing pile 130 in the soft soil roadbed, as shown in Figure 6 , the embodiment one is further improved as follows:

[0042] Preferably, an elastic net 210 is installed between every two adjacent flexible branches 200 on each barb 134, and the elastic coefficients of the elastic nets 210 installed on the upper, middle and lower layers of barbs 134 decrease step by step from top to bottom.

[0043] Preferably, the elastic net 210 installed on the flexible branches 200 of the upper layer of barbs 134 is in a diamond grid shape (not shown in the figure), the elastic net 210 installed on the flexible branches 200 of the middle layer of barbs 134 is in a hexagonal honeycomb grid shape (not shown in the figure), and the elastic net 210 installed on the flexible branches 200 of the lower layer of barbs 134 is in a radial shape (not shown in the figure).

[0044] The technical solutions in the embodiments of the application have at least the following technical effects or advantages:

[0045] By embedding the upper layer of diamond grid-shaped elastic nets 210 into the cracks in the hard shell layer of the soft soil roadbed surface, the hard shell layer cracking is resisted, and the risk of local crushing of the hard shell layer is reduced; the middle layer of hexagonal honeycomb grid-shaped elastic nets 210 wrap around the softening soil body, the honeycomb net captures soil particles, improves the friction resistance, and constrains the lateral displacement of the softening soil body; and the lower layer of radial elastic nets 210 reduces the drag force of the flowing soil body, anchors the flowing soil body, and realizes three-dimensional anchoring, so that the device can be applied to similar high-humidity scenes such as marshes and river bank revetments, and has engineering universality.

[0046] In order to further improve the anchoring effect of the reinforcing pile 130 in the soft soil roadbed, as shown in Figure 7Further improvements are made to the embodiment two as shown:

[0047] Preferably, the flexible branches 200 of the barbs 134 on the middle layer form a double-layer elastic net 210, and the flexible branches 200 of the barbs 134 on the lower layer form a three-layer elastic net 210.

[0048] The technical solutions in the embodiments of the present application have at least the following technical effects or advantages:

[0049] The number of layers of the elastic net 210 increases with the depth, matching the mechanical gradient of the soil body from "hard-soft-flow", the double-layer elastic net 210 on the middle layer forms a "sandwich structure" to capture soil particles, further improves the frictional resistance, and improves the anti-cracking, friction-increasing, and anti-flowing ability of the soil.

[0050] In order to optimize the anchoring force of the reinforced pile 130 in the soft soil subgrade, further improvements are made to the embodiment three:

[0051] Preferably, the flexible branches 200 of the barbs 134 on the middle layer form a double-layer elastic net 210 filled with silicon dioxide powder, which quickly absorbs the water in the soil body to form a gel and bond the soil particles; the flexible branches 200 of the barbs 134 on the lower layer form a three-layer elastic net 210 filled with silicon dioxide particles, which swell and form clumps after absorbing water, forming a "soil-net-silicon" composite anchoring body.

[0052] The technical solutions in the embodiments of the present application have at least the following technical effects or advantages:

[0053] The silicon dioxide powder on the middle layer forms a silicon gel after absorbing the water in the soil, which fills the pores of the soil body, improves the cohesion of the soil body on the middle layer, and blocks the upward infiltration of water, reducing the risk of softening of the hard crust layer on the surface; the silicon dioxide particles on the lower layer swell to twice the original volume after absorbing water, extruding the soil body and filling the gaps between the nets, forming a dense clump, the swelling of the particles generates radial pressure, improving the anchoring force of the lower layer, the porous structure adsorbs free water, accelerating the consolidation of the soil body, reducing the settlement rate, the water-absorbing material reduces the free water content of the soil body, inhibits the development of the plastic state, and improves the long-term stability.

[0054] The above only describes the preferred embodiments of the present application and is not intended to limit the present application. Those skilled in the art can make various modifications and changes to the present application. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A soft soil subgrade reinforcement device, comprising a first support plate (100) and a second support plate (120), wherein the first support plate (100) is rectangular, the second support plate (120) is arched, and the second support plate (120) is detachably mounted on top of the first support plate (100), characterized in that, It also includes a reinforcing pile (130), the side of the first support plate (100) is equipped with a clamp (110), the clamp (110) can lock and fix the reinforcing pile (130), the reinforcing pile (130) includes a pile shell (131), a pile cover (132), a moving plate (133), barbs (134) and a drive column (135), the pile shell (131) is hollow inside and open at the top, the pile cover (132) is fixedly connected to the top of the pile shell (131) by threads, the moving plate (133) is slidably installed inside the pile shell (131), the barbs (134) are fixed on the moving plate (133), and several barbs (134) are divided into upper, middle and lower layers from top to bottom on the moving plate (133), the pile shell (131) is hollow inside and open at the top, the pile cover (132) is fixed to the top of the pile shell (131) by threads, the moving plate (133) is slidably installed inside the pile shell (131), the barbs (134) are fixed on the moving plate (133), and several barbs (134) are divided into upper, middle and lower layers on the moving plate (133) from top to bottom, the pile shell (131) is hollow inside and open at the top, the pile cover (132) is fixed to the top of the pile shell (132) and the drive column (135 ... 31) also has through holes (136) for the movement of barbs (134) on its side wall. The drive column (135) is slidably installed inside the pile shell (131) and located on the upper side of the moving plate (133). The drive column (135) is a cone that is wider at the top and narrower at the bottom. When the drive column (135) moves down, it can squeeze the moving plate (133) from the top and spread towards the pile shell (131), and make the barbs (134) pass through the through holes (136). A number of flexible branches (200) are installed at the end of the barb (134) away from the moving plate (133). The angle between the axis of the barb (134) and the axis of the flexible branch (200) increases gradually from top to bottom. The length of the flexible branch (200) increases gradually from top to bottom. An elastic mesh (210) is installed between two adjacent flexible branches (200) on each of the barbs (134), and the elastic coefficient of the elastic mesh (210) installed on the upper, middle and lower barbs (134) decreases from top to bottom. The flexible branches (200) of the upper barbs (134) in the middle layer form a double-layered elastic mesh (210), and the flexible branches (200) of the upper barbs (134) in the lower layer form a triple-layered elastic mesh (210). The flexible branches (200) of the upper barbs (134) in the middle layer form a double-layered elastic mesh (210) filled with silica powder; the flexible branches (200) of the upper barbs (134) in the lower layer form a triple-layered elastic mesh (210) filled with silica particles.

2. The soft soil subgrade reinforcement device according to claim 1, characterized in that, The barbs (134) of the upper layer are 8-10cm long, the flexible branches (200) are 3cm long, and the angle between the axis of the flexible branches (200) and the axis of the barbs (134) is 20 degrees; the barbs (134) of the middle layer are 12-15cm long, the flexible branches (200) are 5cm long, and the angle between the axis of the flexible branches (200) and the axis of the barbs (134) is 40 degrees; the barbs (134) of the lower layer are 15-20cm long, the flexible branches (200) are 8cm long, and the angle between the axis of the flexible branches (200) and the axis of the barbs (134) is 50 degrees.

3. The soft soil subgrade reinforcement device according to claim 1, characterized in that, The elastic mesh (210) installed on the flexible branch (200) of the upper barb (134) is a rhomboid mesh; the elastic mesh (210) installed on the flexible branch (200) of the middle barb (134) is a hexagonal honeycomb mesh; and the elastic mesh (210) installed on the flexible branch (200) of the lower barb (134) is radial.

4. The soft soil subgrade reinforcement device according to claim 1, characterized in that, Two reinforcing plates (140) are symmetrically installed on the second support plate (120). An adjustable connecting rod (150) is installed between the two reinforcing plates (140). A support rod (160) is installed between each reinforcing plate (140) and the first support plate (100). One end of the support rod (160) is hinged to the first support plate (100), and the other end of the support rod (160) is fixedly connected to the reinforcing plate (140).

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