A kind of anti-settlement soft soil roadbed structure and design method

Abstract

The present invention provides an anti-settlement soft soil roadbed structure and a design method, and relates to the technical field of soft soil roadbed. The anti-settlement soft soil roadbed structure comprises a soft soil layer, a hard shell layer is arranged on the upper surface of the soft soil layer, a water storage layer is arranged on the upper surface of the hard shell layer, a first filler layer is arranged on the upper surface of the water storage layer, a second filler layer is arranged on the upper surface of the first filler layer, a concrete layer is arranged on the upper surface of the second filler layer, a reinforcement layer is arranged on the upper surface of the concrete layer, a road surface layer is arranged on the upper surface of the reinforcement layer, a sand pile is arranged inside the soft soil layer, a reinforcing plate is arranged inside the soft soil layer, and a stabilizing block is arranged inside the soft soil layer. By providing a sand pile in the shape of a triangular claw, it replaces the existing technology that only serves as a compacted soil function, and can be used as a supporting pile, thereby improving the stability of the soft soil layer and playing an anti-settlement role.

Description

Technical Field

[0001] The invention relates to the technical field of soft soil roadbed, in particular to an anti-settlement soft soil roadbed structure and a design method. Background Art

[0002] Silt soft soil has the characteristics of high water content, poor permeability, long consolidation time, high compressibility and low bearing capacity. When silt soft soil is subjected to external pressure load, it will show obvious drainage consolidation and rheological characteristics, causing large foundation settlement. Structural buildings such as roads and bridges built on this foundation face the threat of uneven settlement; it also poses a challenge to the safety and stability during the construction and operation period.

[0003] When applying for the present invention, the applicant found through searching that a Chinese patent disclosed "Anti-settlement water-retaining roadbed structure and design method in water-rich soft soil area", and its application number is "202011086452.8". This patent mainly increases the permeability and water replenishment effect of the water-retaining structure layer on the soft soil layer through sand wells; that is, although the soft soil layer will gradually drain and consolidate to produce settlement under external loads, there is a water replenishment effect at the same time, and the external water can replenish the water discharged by consolidation in time, so that the drainage and water replenishment can achieve a new balance, thereby achieving the purpose of reducing or eliminating large deformation and uneven settlement of the soft soil foundation;

[0004] However, this structure reduces or eliminates large deformation and uneven settlement of soft soil foundation by maintaining water balance. The stability of this method is not strong. The soft soil layer will shake irregularly under the penetration of water, affecting the overall stability and having poor anti-settlement effect. Summary of the invention

[0005] 1. Technical issues to be resolved

[0006] In view of the deficiencies in the prior art, the present invention provides an anti-settlement soft soil roadbed structure and a design method, which solves the problem of poor anti-settlement effect.

[0007] (II) Technical solution

[0008] To achieve the above objectives, the present invention is implemented through the following technical solutions: an anti-settlement soft soil roadbed structure, comprising a soft soil layer, a hard shell layer is arranged on the upper surface of the soft soil layer, a water storage layer is arranged on the upper surface of the hard shell layer, a first filler layer is arranged on the upper surface of the water storage layer, a second filler layer is arranged on the upper surface of the first filler layer, a concrete layer is arranged on the upper surface of the second filler layer, a reinforcement layer is arranged on the upper surface of the concrete layer, and a pavement layer is arranged on the upper surface of the reinforcement layer;

[0009] Sand piles are arranged inside the soft soil layer, a reinforcement plate is arranged inside the soft soil layer, and a stabilizing block is arranged inside the soft soil layer.

[0010] Preferably, the first filler layer is filled with stones, and the second filler layer is filled with stones, and the particle size of the stones in the second filler layer is smaller than that in the first filler layer.

[0011] Preferably, the interior of the reinforcement layer is filled with reinforcing ribs.

[0012] Preferably, the pavement layer is made of asphalt.

[0013] Preferably, the first packing layer and the second packing layer form a trapezoid, and drainage grooves are provided between adjacent ones.

[0014] Preferably, the sand pile is columnar, and a plurality of pile holes are formed on the outer wall of the sand pile.

[0015] Preferably, the sand pile is in a triangular claw shape, and a plurality of pile holes are formed on the outer wall of the sand pile.

[0016] A design method for an anti-settlement soft soil roadbed structure comprises the following steps:

[0017] Step 1: Dig a pit in the soft soil layer in the shape of sand piles, reinforcement plates and stabilizing blocks, and fill the pit with sand piles, reinforcement plates and stabilizing blocks in sequence, leaving 15% of the total length;

[0018] Step 2: laying a hard shell layer on the upper surface of the soft soil layer, laying an aquifer layer on the upper surface of the hard shell layer, and laying a first filler layer and a second filler layer equidistantly on the upper surface of the aquifer layer, so that the formed drainage trough is connected to the sand pile, and the sand pile is filled with a woven bag filled with sand;

[0019] Step three: laying a concrete layer on the upper surface of the second filler layer, laying a reinforcement layer on the upper surface of the concrete layer, filling reinforcing ribs into the interior of the reinforcement layer, and laying a pavement layer on the upper surface of the reinforcement layer.

[0020] (III) Beneficial effects

[0021] The present invention provides an anti-settlement soft soil roadbed structure and a design method, which have the following beneficial effects:

[0022] 1. Reinforcement plates and stabilizing blocks are provided to reinforce the soft soil layer and reduce the possibility of its flow and settlement.

[0023] 2. Sand piles are set up, which are filled with woven bags filled with sand, which can absorb moisture and thus reduce the moisture content of the soft soil layer, thereby improving its stability.

[0024] 3. Sand piles are provided in a triangular claw shape, which replace the existing technology that only compacts the soil and can be used as support piles, thereby improving the stability of the soft soil layer and playing a role in preventing settlement. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the present invention;

[0026] Figure 2 For the present invention Figure 1 A schematic diagram of the structure enlargement at the center A;

[0027] Figure 3 It is a schematic diagram of the sand pile structure of the present invention;

[0028] Figure 4 It is a three-dimensional schematic diagram of the present invention.

[0029] Among them, 1. soft soil layer; 2. hard shell layer; 3. water storage layer; 4. first filling layer; 5. second filling layer; 6. concrete layer; 7. reinforcement layer; 71. reinforcement ribs; 8. pavement layer; 9. drainage ditch; 10. sand piles; 101. pile holes; 11. reinforcement plates; 12. stabilization blocks. DETAILED DESCRIPTION

[0030] 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.

[0031] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific position, be constructed and operated in a specific position, and therefore cannot be understood as limiting the present invention; the terms "first", "second", and "third" are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance. In addition, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be a connection between the two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] Embodiment 1:

[0033] like Figure 1-4As shown, an embodiment of the present invention provides an anti-subsidence soft soil roadbed structure, including a soft soil layer 1, a hard shell layer 2 is arranged on the upper surface of the soft soil layer 1, a water storage layer 3 is arranged on the upper surface of the hard shell layer 2, which plays the role of water diversion and water storage, a first filler layer 4 is arranged on the upper surface of the water storage layer 3, a second filler layer 5 is arranged on the upper surface of the first filler layer 4, the first filler layer 4 is filled with stones, and the second filler layer 5 is filled with stones, the stone particle size of the second filler layer 5 is smaller than that of the first filler layer 4, which plays a role of reinforcement.

[0034] A concrete layer 6 is arranged on the upper surface of the second filler layer 5, a reinforcement layer 7 is arranged on the upper surface of the concrete layer 6, and the interior of the reinforcement layer 7 is filled with reinforcing ribs 71 for reinforcement, and a pavement layer 8 is arranged on the upper surface of the reinforcement layer 7, and the pavement layer 8 is made of asphalt.

[0035] The first filler layer 4 and the second filler layer 5 form a trapezoid, and drainage grooves 9 are provided between adjacent layers to collect and drain water that penetrates downward from the pavement layer 8.

[0036] A sand pile 10 is arranged inside the soft soil layer 1. The sand pile 10 is filled with a woven bag filled with sand. The upper end of the sand pile 10 is connected to the drainage trough 9, and the water in the drainage trough 9 is introduced into the sand pile 10, and then the water is adsorbed. The sand pile 10 is columnar, and a plurality of pile holes 101 are opened on the outer wall of the sand pile 10, which can adsorb the moisture in the soft soil layer 1. A reinforcing plate 11 is arranged inside the soft soil layer 1, and a stabilizing block 12 is arranged inside the soft soil layer 1, which can reinforce the soft soil layer 1 and reduce the possibility of its flow and settlement.

[0037] A design method for an anti-settlement soft soil roadbed structure comprises the following steps:

[0038] Step 1: dig a pit in the soft soil layer 1 in the shape of the sand pile 10, the reinforcement plate 11 and the stabilizing block 12, and fill the sand pile 10, the reinforcement plate 11 and the stabilizing block 12 into the pit in sequence, leaving 15% of the total length;

[0039] Step 2: Lay a hard shell layer 2 on the upper surface of the soft soil layer 1, and lay an aquifer 3 on the upper surface of the hard shell layer 2, and lay a first filler layer 4 and a second filler layer 5 equidistantly on the upper surface of the aquifer 3, so that the formed drainage trough 9 is connected to the sand pile 10, and fill the sand pile 10 with a woven bag filled with sand;

[0040] Step three: lay a concrete layer 6 on the upper surface of the second filler layer 5 , and lay a reinforcement layer 7 on the upper surface of the concrete layer 6 , fill reinforcing ribs 71 into the reinforcement layer 7 , and lay a pavement layer 8 on the upper surface of the reinforcement layer 7 .

[0041] Embodiment 2:

[0042] like Figure 1-4As shown, an embodiment of the present invention provides an anti-subsidence soft soil roadbed structure, including a soft soil layer 1, a hard shell layer 2 is arranged on the upper surface of the soft soil layer 1, a water storage layer 3 is arranged on the upper surface of the hard shell layer 2, which plays the role of water diversion and water storage, a first filler layer 4 is arranged on the upper surface of the water storage layer 3, a second filler layer 5 is arranged on the upper surface of the first filler layer 4, the first filler layer 4 is filled with stones, and the second filler layer 5 is filled with stones, the stone particle size of the second filler layer 5 is smaller than that of the first filler layer 4, which plays a role of reinforcement.

[0043] A concrete layer 6 is arranged on the upper surface of the second filler layer 5, a reinforcement layer 7 is arranged on the upper surface of the concrete layer 6, and the interior of the reinforcement layer 7 is filled with reinforcing ribs 71 for reinforcement, and a pavement layer 8 is arranged on the upper surface of the reinforcement layer 7, and the pavement layer 8 is made of asphalt.

[0044] The first filler layer 4 and the second filler layer 5 form a trapezoid, and drainage grooves 9 are provided between adjacent layers to collect and drain water that penetrates downward from the pavement layer 8.

[0045] A sand pile 10 is arranged inside the soft soil layer 1. The sand pile 10 is filled with a woven bag filled with sand. The upper end of the sand pile 10 is connected to the drainage trough 9, and the water in the drainage trough 9 is introduced into the sand pile 10, thereby absorbing the water. The sand pile 10 is in the shape of a triangular claw, and a plurality of pile holes 101 are opened on the outer wall of the sand pile 10, which can absorb the moisture in the soft soil layer 1. It replaces the existing technology that only serves as a compacting soil function, and can be used as a supporting pile, thereby improving the stability of the soft soil layer 1 and playing a role in preventing settlement. A reinforcing plate 11 is arranged inside the soft soil layer 1, and a stabilizing block 12 is arranged inside the soft soil layer 1, which can reinforce the soft soil layer 1 and reduce the possibility of its flow and settlement.

[0046] A design method for an anti-settlement soft soil roadbed structure comprises the following steps:

[0047] Step 1: dig a pit in the soft soil layer 1 in the shape of the sand pile 10, the reinforcement plate 11 and the stabilizing block 12, and fill the sand pile 10, the reinforcement plate 11 and the stabilizing block 12 into the pit in sequence, leaving 15% of the total length;

[0048] Step 2: Lay a hard shell layer 2 on the upper surface of the soft soil layer 1, and lay an aquifer 3 on the upper surface of the hard shell layer 2, and lay a first filler layer 4 and a second filler layer 5 equidistantly on the upper surface of the aquifer 3, so that the formed drainage trough 9 is connected to the sand pile 10, and fill the sand pile 10 with a woven bag filled with sand;

[0049] Step three: lay a concrete layer 6 on the upper surface of the second filler layer 5 , and lay a reinforcement layer 7 on the upper surface of the concrete layer 6 , fill reinforcing ribs 71 into the reinforcement layer 7 , and lay a pavement layer 8 on the upper surface of the reinforcement layer 7 .

[0050] Embodiment three:

[0051] like Figure 1-4 As shown, an embodiment of the present invention provides an anti-subsidence soft soil roadbed structure, including a soft soil layer 1, a hard shell layer 2 is arranged on the upper surface of the soft soil layer 1, a water storage layer 3 is arranged on the upper surface of the hard shell layer 2, which plays the role of water diversion and water storage, a first filler layer 4 is arranged on the upper surface of the water storage layer 3, a second filler layer 5 is arranged on the upper surface of the first filler layer 4, the first filler layer 4 is filled with stones, and the second filler layer 5 is filled with stones, the stone particle size of the second filler layer 5 is smaller than that of the first filler layer 4, which plays a role of reinforcement.

[0052] A concrete layer 6 is arranged on the upper surface of the second filler layer 5, a reinforcement layer 7 is arranged on the upper surface of the concrete layer 6, and the interior of the reinforcement layer 7 is filled with reinforcing ribs 71 for reinforcement, and a pavement layer 8 is arranged on the upper surface of the reinforcement layer 7, and the pavement layer 8 is made of asphalt.

[0053] The first filler layer 4 and the second filler layer 5 form a trapezoid, and drainage grooves 9 are provided between adjacent layers to collect and drain water that penetrates downward from the pavement layer 8.

[0054] A sand pile 10 is arranged inside the soft soil layer 1. The sand pile 10 is filled with a woven bag filled with sand. The upper end of the sand pile 10 is connected to the drainage trough 9, and the water in the drainage trough 9 is introduced into the sand pile 10, thereby absorbing the water. The sand pile 10 has two shapes, namely, a columnar shape and a triangular claw shape, and the sand piles 10 of different shapes are arranged alternately to improve the water absorption and support. A plurality of pile holes 101 are opened on the outer wall of the sand pile 10, which can absorb the moisture in the soft soil layer 1. A reinforcing plate 11 is arranged inside the soft soil layer 1, and a stabilizing block 12 is arranged inside the soft soil layer 1, which can reinforce the soft soil layer 1 and reduce the possibility of its flow and settlement.

[0055] A design method for an anti-settlement soft soil roadbed structure comprises the following steps:

[0056] Step 1: dig a pit in the soft soil layer 1 in the shape of the sand pile 10, the reinforcement plate 11 and the stabilizing block 12, and fill the sand pile 10, the reinforcement plate 11 and the stabilizing block 12 into the pit in sequence, leaving 15% of the total length;

[0057] Step 2: Lay a hard shell layer 2 on the upper surface of the soft soil layer 1, and lay an aquifer 3 on the upper surface of the hard shell layer 2, and lay a first filler layer 4 and a second filler layer 5 equidistantly on the upper surface of the aquifer 3, so that the formed drainage trough 9 is connected to the sand pile 10, and fill the sand pile 10 with a woven bag filled with sand;

[0058] Step three: lay a concrete layer 6 on the upper surface of the second filler layer 5 , and lay a reinforcement layer 7 on the upper surface of the concrete layer 6 , fill reinforcing ribs 71 into the reinforcement layer 7 , and lay a pavement layer 8 on the upper surface of the reinforcement layer 7 .

[0059] In summary, the difference between the third embodiment and the first and second embodiments is that, in terms of the selection of the sand pile 10, two shapes (i.e., columnar and triangular claw) are used together, which replaces the existing technology of only being used for compacting the soil, and can be used as a supporting pile, thereby improving the stability of the soft soil layer 1 and playing a role in preventing subsidence.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An anti-settlement soft soil roadbed structure, comprising a soft soil layer (1), characterized in that: The upper surface of the soft soil layer (1) is provided with a hard shell layer (2), the upper surface of the hard shell layer (2) is provided with a water storage layer (3), the upper surface of the water storage layer (3) is provided with a first filler layer (4), the upper surface of the first filler layer (4) is provided with a second filler layer (5), the upper surface of the second filler layer (5) is provided with a concrete layer (6), the upper surface of the concrete layer (6) is provided with a reinforcement layer (7), and the upper surface of the reinforcement layer (7) is provided with a road surface layer (8); A sand pile (10) is arranged inside the soft soil layer (1), a reinforcement plate (11) is arranged inside the soft soil layer (1), and a stabilizing block (12) is arranged inside the soft soil layer (1); The design method of the anti-settlement soft soil roadbed structure comprises the following steps: Step 1: Digging a pit in the soft soil layer (1) in the shape of a sand pile (10), a reinforcing plate (11) and a stabilizing block (12), and filling the pit with sand piles (10), reinforcing plates (11) and stabilizing blocks (12) in sequence, leaving 15% of the overall length; Step 2: laying a hard shell layer (2) on the upper surface of the soft soil layer (1), laying an aquifer layer (3) on the upper surface of the hard shell layer (2), and laying a first filler layer (4) and a second filler layer (5) at equal intervals on the upper surface of the aquifer layer (3), so that the formed drainage ditch (9) is connected to the sand pile (10), and filling the sand pile (10) with a woven bag filled with sand; Step three: laying a concrete layer (6) on the upper surface of the second filler layer (5), laying a reinforcement layer (7) on the upper surface of the concrete layer (6), filling reinforcing ribs (71) into the reinforcement layer (7), and laying a pavement layer (8) on the upper surface of the reinforcement layer (7).

2. The anti-settlement soft soil roadbed structure according to claim 1, characterized in that: The first filler layer (4) is filled with stones, and the second filler layer (5) is filled with stones. The particle size of the stones in the second filler layer (5) is smaller than that in the first filler layer (4).

3. The anti-settlement soft soil roadbed structure according to claim 1, characterized in that: The interior of the reinforcement layer (7) is filled with reinforcing ribs (71).

4. The anti-settlement soft soil roadbed structure according to claim 1, characterized in that: Said The road surface layer (8) is made of asphalt.

5. The anti-settlement soft soil roadbed structure according to claim 1, characterized in that: The first packing layer (4) and the second packing layer (5) form a trapezoid, and drainage grooves (9) are provided between adjacent layers.

6. The anti-settlement soft soil roadbed structure according to claim 1, characterized in that: The sand pile (10) is columnar, and a plurality of pile holes (101) are formed on the outer wall of the sand pile (10).

7. The anti-settlement soft soil roadbed structure according to claim 1, characterized in that: The sand pile (10) is in the shape of a triangular claw, and a plurality of pile holes (101) are formed on the outer wall of the sand pile (10).

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