Anti-squeeze soil control and settlement reinforcement structure for embankment heightening and thickening in ultra-thick soft soil areas

Abstract

The present invention discloses a soil-squeezing and settlement-control reinforcement structure for raising and thickening embankments in ultra-thick soft soil areas. The structure comprises a mixing pile treatment area, reinforcement piles, geogrids, a raising and thickening area, and a ballast platform. The mixing pile treatment area is located in the soil on both sides of the embankment. The reinforcement piles are arranged in the mixing pile treatment area. The geogrids are laid on the surface of the embankment and the surface of the mixing pile treatment area and extend to the surface outside the mixing pile treatment area. The raising and thickening area is arranged at the upper end of the embankment and covers the geogrid. The ballast platform is at least arranged at the upper end of the mixing pile treatment area and covers at least the geogrid on the surface of the mixing pile treatment area. The mixing pile treatment area fully treats both sides of the embankment, changes the soil characteristics on both sides, and improves the soil strength and deformation resistance. The geogrid can improve the tightness of the combination of the raising and thickening area and the embankment, while preventing differential settlement, reducing additional stress in the deep layer, and ensuring the working integrity of the entire embankment.

Description

Technical Field

[0001] The invention relates to the technical field of soft soil roadbed construction, in particular to a soil-squeezing and settlement-control reinforcement structure for raising and thickening embankments in ultra-thick soft soil layers. Background Art

[0002] When constructing embankments in areas with extra-thick soft soil layers (20 to 30 mm thick), the soft soil layers are often not reinforced, resulting in low construction efficiency and long construction periods. Compared to graded loading and filling construction, under these conditions, embankments can be successfully constructed without landslides, even without reinforcement of the soft soil layers. However, under the action of embankment loads, the deep soft soil will continue to slowly squeeze outward, creating a deep potential sliding surface and causing the embankment platform to bulge, leading to persistent embankment settlement. With increasing construction requirements, embankments in areas with extra-thick soft soil layers need to be heightened and thickened. Direct heightening and thickening, however, requires lower construction efficiency and longer construction periods than in previous periods to prevent embankments from sliding, which is inconsistent with current efficiency and construction period requirements. Therefore, a reinforcement structure for extra-thick soft soil layers that prevents soil squeezing and controls settlement is needed. Summary of the Invention

[0003] The embodiment of the present application solves the problem that the construction of embankments in soft soil layers easily leads to the uplift of the ground surfaces on both sides by providing an anti-squeeze soil settlement reinforcement structure for raising and thickening embankments in ultra-thick soft soil layers.

[0004] The embodiment of the present application provides a soil-squeezing and settlement-control reinforcement structure for raising and thickening an embankment in an ultra-thick soft soil layer, comprising:

[0005] A mixing pile treatment area, the mixing pile treatment area is located in the soil on both sides of the embankment;

[0006] Reinforcement piles, the reinforcement piles being arranged in the mixing pile treatment area;

[0007] A geogrid, the geogrid being laid on the surface of the embankment and the surface of the mixing pile treatment area and extending to the surface outside the mixing pile treatment area;

[0008] A heightened and thickened area, the heightened and thickened area being arranged at the upper end of the embankment and covering the geogrid;

[0009] A ballast platform is provided at least at the upper end of the mixing pile treatment area and covers at least the geogrid on the surface of the mixing pile treatment area.

[0010] The beneficial effects of the above embodiments are: the mixing pile treatment area fully treats both sides of the embankment, changes the soil characteristics on both sides, and improves the soil strength and deformation resistance. The geogrid can improve the tightness of the combination of the heightened and thickened area and the embankment, while preventing differential settlement, reducing additional stress in the deep layer, and ensuring the working integrity of the entire embankment. The ballast platform can further improve the integrity of the structure formed by the heightened and thickened area, the mixing pile treatment area, the geogrid, and the reinforcement piles, thereby reducing the degree and probability of surface uplift.

[0011] Based on the above embodiment, the embodiment of the present application can also be improved as follows:

[0012] In one embodiment of the present application, the reinforcement piles are wooden piles. The beneficial effect of this step is that wooden piles have high rigidity and high strength reliability, which can make up for the construction quality defects of the mixing piles.

[0013] In one embodiment of the present application: the reinforcement piles are arranged to form two or three rows of plum blossom-shaped structures and are laid out at the foot of the embankment.

[0014] In one embodiment of the present application, the reinforcement pile is a T-shaped structure.

[0015] In one embodiment of the present application, the geogrid forms a grid-like structure, the reinforcement piles are positioned within the meshes of the grid-like structure, and the heads of the reinforcement piles overlap and join the geogrid forming the meshes to form a joint structure. This step has the beneficial effect of enhancing the ballast effect of the ballast platform by overlapping and joining the heads of the T-shaped wooden piles with the geogrid and embedding them beneath the ballast platform.

[0016] In one embodiment of the present application: the outer side surface of the heightened and thickened area forms a trapezoidal structure with the small end on top.

[0017] In one embodiment of the present application: the side of the ballast platform facing the raised and thickened area has the same slope as the corresponding side of the raised and thickened area, and the side of the ballast platform away from the raised and thickened area gradually tilts away from the embankment from top to bottom. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly describes the drawings required for the specific embodiments or the description of the prior art. Similar elements or parts are generally identified by similar reference numerals throughout the drawings. Elements or parts in the drawings are not necessarily drawn to scale.

[0019] Figure 1 It is a structural schematic diagram of a specific embodiment;

[0020] Figure 2Schematic diagram of the arrangement of reinforcement piles in geogrid.

[0021] Among them, there are 1 mixing pile treatment area, 2 reinforcement piles, 3 geogrids, 4 heightened and thickened areas, 5 ballast platforms, and 6 embankments. DETAILED DESCRIPTION

[0022] In this application, unless otherwise expressly specified or limited, terms such as installation, connection, connection, fixing, and affixed connection 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, and the mechanical connection method can be selected from the existing technology using appropriate connection methods, such as welding, riveting, threaded connection, bonding, pin connection, key connection, elastic deformation connection, snap connection, interference connection, and injection molding to achieve structural connection; it can also be an electrical connection, through which energy or signals are transmitted; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two components or the interaction relationship between two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances. Specific embodiments

[0024] like Figure 1 As shown, a soil-squeezing and settlement-control reinforcement structure for raising and thickening embankments in ultra-thick soft soil areas comprises: a mixing pile treatment area 1, reinforcement piles 2, geogrids 3, a raising and thickening area 4, and a ballast platform 5. The mixing pile treatment area 1 is located in the soil on both sides of the embankment 6, the reinforcement piles 2 are arranged in the mixing pile treatment area 1, the geogrids 3 are laid on the surface of the embankment 6 and the surface of the mixing pile treatment area 1 and extend to the surface outside the mixing pile treatment area 1, the raising and thickening area 4 is arranged at the upper end of the embankment 6 and covers the geogrid 3, and the ballast platform 5 is arranged at least at the upper end of the mixing pile treatment area 1 and covers at least the geogrid 3 on the surface of the mixing pile treatment area 1.

[0025] Among them, Figure 2 As shown, the reinforcement piles 2 are wooden piles, which are arranged in two or three rows in a plum blossom shape and are arranged at the foot of the embankment 6. Since mixing piles generally have common quality problems such as uneven mixing body quality and slurry when used in soft soil layers, by setting wooden piles in the mixing pile treatment area 1 and forming a composite reinforcement structure, the overall strength and quality of the composite reinforced structure can be improved.

[0026] Among them, Figure 1 、 2 As shown, the reinforcement pile 2 is a T-shaped structure, the geogrid 3 forms a grid structure, the reinforcement pile 2 is located in the mesh of the grid structure, the head of the reinforcement pile 2 overlaps with the geogrid 3 forming the mesh and forms a combined structure, and the combined structure is directly ballasted by the ballast platform 5, so as to improve the ballasting effect of the ballast platform 5 on the combined structure.

[0027] Among them, Figure 1 As shown, the outer side surface of the raised and thickened area 4 forms a trapezoidal structure with the small end on top, the side of the ballast platform 5 facing the raised and thickened area 4 has the same slope as the corresponding side surface of the raised and thickened area 4, and the side of the ballast platform 5 away from the raised and thickened area 4 gradually tilts from top to bottom in the direction away from the embankment 6. Through the structure of the above shape, the stability of the positioning of the raised and thickened area 4 and the ballast platform 5 can be greatly improved.

[0028] The advantages of this type of anti-squeeze soil control settlement reinforcement structure for embankments in ultra-thick soft soil areas are as follows:

[0029] 1. The wooden piles have high rigidity and strong strength reliability, which can make up for the quality defects of mixing pile construction;

[0030] 2. Dike 6 is usually located near water, which can have a strong corrosive effect on wooden piles. However, the mixing pile treatment area 1 can ensure the working environment of the wooden piles. The mixing body is reinforced soil with a low permeability coefficient, which can provide a good working environment for the wooden piles to function for a long time and avoid wooden pile corrosion.

[0031] 3. The geogrid 3 can improve the tightness of the connection between the heightened and thickened area 4 and the embankment 6, while preventing differential settlement and reducing additional stress in the deep layer.

[0032] The above are only embodiments of the present invention. Common knowledge such as the known specific structures and characteristics in the scheme is not described in detail here. Ordinary technicians in the relevant field are aware of all common technical knowledge in the technical field of the invention before the application date or priority date, can obtain all existing technologies in the field, and have the ability to apply conventional experimental means before that date. Ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the guidance of this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several variations and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A soil-squeezing and settlement-control reinforcement structure for raising and thickening embankments in ultra-thick soft soil areas, characterized in that: include: A mixing pile treatment area, the mixing pile treatment area is located in the soil on both sides of the embankment, and the mixing pile treatment area fully treats both sides of the embankment; Reinforcement piles, which are arranged in the mixing pile treatment area and are wooden piles; A geogrid, the geogrid being laid on the surface of the embankment and the surface of the mixing pile treatment area and extending to the surface outside the mixing pile treatment area, the geogrid forming a grid structure, the reinforcement piles being located in the meshes of the grid structure, and the heads of the reinforcement piles overlapping the geogrid forming the meshes to form a combined structure; A heightened and thickened area, the heightened and thickened area being arranged at the upper end of the embankment and covering the geogrid, the outer side of the heightened and thickened area forming a trapezoidal structure with the small end at the top; A ballast platform is provided at least at the upper end of the mixing pile treatment area and covers at least the geogrid on the surface of the mixing pile treatment area.

2. The anti-squeeze soil settlement control reinforcement structure according to claim 1, characterized in that: The reinforcement piles are arranged to form two or three rows of plum blossom-shaped structures and are laid out at the foot of the embankment.

3. The anti-squeeze soil settlement control reinforcement structure according to claim 2, characterized in that: The reinforcement pile is a T-shaped structure.

4. The anti-squeeze soil settlement control reinforcement structure according to claim 3, characterized in that: The side of the ballast platform facing the raised and thickened area has the same slope as the corresponding side of the raised and thickened area, and the side of the ballast platform away from the raised and thickened area gradually tilts away from the embankment from top to bottom.

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