Lightweight foam concrete filling structure suitable for soft soil subgrade

Abstract

The utility model relates to soft soil roadbed concrete filling technical field especially to be suitable for soft soil roadbed's light foam concrete filling structure, including roadbed foundation pit, the inside filling of roadbed foundation pit has roadbed filling main part, the roadbed filling main part from top to bottom includes rock bed, foam light soil layer and concrete layer in proper order, the inside of concrete layer is laid with a plurality of groups of reinforcing steel sheets of same interval side by side, the inside of foam light soil layer and the position department of corresponding reinforcing steel sheet are provided with a plurality of groups of evenly distributed positioning hollow frame, in the utility model, the bottom layer is rock bed, foam light soil layer is laid on rock bed, longitudinal anchor rod one and longitudinal anchor rod two penetrate reinforcing steel sheet and the rod cover in positioning hollow frame in proper order and anchor into rock bed, lower end bending section embeds rock bed, forms integral force system, and this structure can promote the structural strength of filler area to strengthen the load -bearing capacity of road surface, and then promote the stability of road surface.

Description

Technical Field

[0001] This utility model relates to the field of concrete filling technology for soft soil subgrade, specifically a lightweight foamed concrete filling structure suitable for soft soil subgrade. Background Technology

[0002] Foamed concrete, also known as lightweight concrete, is a new type of lightweight thermal insulation material containing a large number of closed pores. It is produced by mechanically foaming a foaming agent using a foaming machine's foaming system, uniformly mixing the foam with cement slurry, and then pouring it in place or molding it using the foaming machine's pumping system. After natural curing, it becomes a material that has been used to build up a new type of lightweight thermal insulation material. Lightweight foamed concrete (also known as foamed lightweight soil) has significant technical advantages in the treatment of soft soil subgrades. Its core advantage lies in reducing additional stress and effectively controlling settlement through its lightweight and high-strength characteristics.

[0003] In conventional construction of soft soil subgrades, a foundation pit is excavated on the ground, and then backfilled with soil and compacted to fill the pit. However, the fill area after backfilling with lightweight foamed concrete has relatively weak structural strength, and it is prone to deformation during long-term use, which will affect the use of the road surface.

[0004] Therefore, it is particularly important to design a lightweight foamed concrete filling structure suitable for soft soil subgrades to overcome the above-mentioned technical defects and improve overall practicality. Utility Model Content

[0005] The purpose of this invention is to provide a lightweight foamed concrete filling structure suitable for soft soil subgrades, so as to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A lightweight foamed concrete filling structure suitable for soft soil subgrade includes a subgrade pit, the subgrade pit being filled with a subgrade filling body, the subgrade filling body comprising, from top to bottom, a rock layer, a foamed lightweight soil layer, and a concrete layer, the concrete layer having multiple sets of equally spaced reinforcing steel plates laid side by side, the foamed lightweight soil layer having multiple sets of evenly distributed positioning hollow frames installed at positions corresponding to the reinforcing steel plates, the positioning hollow frames having rod sleeves welded to both ends, and longitudinal anchor bolts one and two being inserted into the two sets of rod sleeves respectively.

[0008] As a preferred embodiment of this invention, the foamed lightweight soil layer is laid on the rock stratum, and its density is typically 400–1200 kg / m³. 3 .

[0009] As a preferred embodiment of this utility model, an HDPE geomembrane is laid between the rock layer and the foamed lightweight soil layer.

[0010] The above technical solution involves laying HDPE geomembrane to block groundwater seepage.

[0011] As a preferred embodiment of this utility model, the interior of the reinforcing steel plate has multiple sets of assembly through holes for longitudinal anchor rod one and longitudinal anchor rod two to pass through. The reinforcing steel plate is treated with sandblasting to remove rust, and the reinforcing steel plate is coated with epoxy structural adhesive on both sides and pressed into the interior of the concrete layer.

[0012] Through the above technical solutions, the reinforcing steel plates can work together to improve the structural performance. When a concentrated load is applied, the pre-embedded reinforcing steel plate 3 can increase the contact area, disperse the peak stress, and prevent the concrete from being crushed due to excessive local pressure. In addition, the reinforcing steel plate 3 can constrain the deformation of the concrete surface, inhibit the concrete from cracking under high pressure, and ensure the effective transfer of load.

[0013] As a preferred embodiment of this utility model, the top ends of both the first longitudinal anchor rod and the second longitudinal anchor rod penetrate the top of the reinforcing steel plate and are fixed by assembly bolts, while the bottom ends of the first longitudinal anchor rod and the second longitudinal anchor rod are anchored into the interior of the rock stratum.

[0014] As a preferred embodiment of this utility model, the bottom bending sections of the longitudinal anchor rod one and the longitudinal anchor rod two are bent in opposite directions.

[0015] Through the above technical solution, the lower bent section is embedded in the rock strata to form an integral force-bearing system.

[0016] Compared with the prior art, the beneficial effects of this utility model are:

[0017] This invention utilizes a lightweight foamed concrete filling structure suitable for soft soil subgrades. The bottom layer is a rock layer, upon which a lightweight foamed soil layer is laid, topped with a concrete layer. This structure disperses the load and enhances resistance to deformation. Reinforcing steel plates are embedded within the concrete layer, working synergistically to improve structural performance. Under concentrated loads, the embedded steel plates increase the contact area, dispersing peak stress and preventing the concrete from crushing due to excessive local pressure. The steel plates also constrain concrete surface deformation, inhibiting concrete collapse under high pressure and ensuring effective load transfer. Multiple sets of positioning hollow frames are embedded within the lightweight foamed soil layer. Longitudinal anchor rods one and two penetrate the reinforcing steel plates and the sleeves in the positioning hollow frames, anchoring into the rock layer. The lower bent sections are embedded in the rock layer, forming an integrated load-bearing system. This structure enhances the structural strength of the filling area, thereby increasing the road surface's load-bearing capacity and stability. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of this utility model;

[0019] Figure 2This is a structural diagram of the rock strata, foamed lightweight soil layer, and concrete layer of this utility model;

[0020] Figure 3 This is a structural diagram of the fixing steel plate of this utility model;

[0021] Figure 4 This is a partial structural diagram of the present utility model.

[0022] In the diagram: 1. Roadbed pit; 2. Roadbed filling body; 201. Rock layer; 202. Foamed lightweight soil layer; 203. Concrete layer; 3. Reinforcing steel plate; 4. Positioning hollow frame; 401. Pole sleeve; 5. Longitudinal anchor bolt one; 501. Longitudinal anchor bolt two. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0024] To facilitate understanding of this utility model, a more comprehensive description of the utility model will be given below with reference to the accompanying drawings, and several embodiments of the utility model will be provided. However, the utility model 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 utility model more thorough and complete.

[0025] For examples, please refer to Figure 1-4 This utility model provides a technical solution:

[0026] A lightweight foamed concrete filling structure suitable for soft soil subgrade includes a subgrade pit 1, the subgrade pit 1 is filled with a subgrade filling body 2, the subgrade filling body 2 includes a rock layer 201, a foamed lightweight soil layer 202 and a concrete layer 203 from top to bottom, which disperses the load and enhances the resistance to deformation. Multiple sets of equally spaced reinforcing steel plates 3 are laid side by side inside the concrete layer 203, which can work together to improve the structural performance. When a concentrated load is applied, the pre-embedded reinforcing steel plates 3 can increase the contact area, disperse the peak stress, and prevent the concrete from being crushed due to excessive local pressure. The reinforcing steel plates 3 can also restrain the deformation of the concrete surface, inhibit the concrete from cracking under high pressure, and ensure the effective transfer of load. Multiple sets of evenly distributed positioning hollow frames 4 are set inside the foamed lightweight soil layer 202 and at the corresponding positions of the reinforcing steel plates 3. The two ends of the positioning hollow frames 4 are welded with rod sleeves 401. The two sets of rod sleeves 401 are respectively inserted with longitudinal anchor rod 1 5 and longitudinal anchor rod 2 501.

[0027] The foamed lightweight soil layer 202 is laid on the rock layer 201, and its density is typically 400–1200 kg / m³. 3 An HDPE geomembrane is laid between the rock layer 201 and the foamed lightweight soil layer 202. Multiple sets of assembly through holes are opened inside the reinforcing steel plate 3 for longitudinal anchor bolts 1 and 2 501 to pass through. The reinforcing steel plate 3 is treated with sandblasting to remove rust. Epoxy structural adhesive is applied to both sides of the reinforcing steel plate 3 and pressed into the concrete layer 203. The tops of longitudinal anchor bolts 1 and 2 501 penetrate the top of the reinforcing steel plate 3 and are fixed with assembly bolts. The bottom ends of longitudinal anchor bolts 1 and 2 501 are anchored into the rock layer 201. The bent sections at the bottom ends of longitudinal anchor bolts 1 and 2 501 bend in opposite directions, forming an integrated load-bearing system. This structure can improve the structural strength of the filling area, thereby enhancing the bearing capacity of the pavement and improving its stability.

[0028] The workflow of this utility model is as follows: The lightweight foamed concrete filling structure designed for soft soil subgrade uses a rock layer 201 as the bottom layer, a lightweight foamed soil layer 202 laid on the rock layer 201, and a concrete layer 203 on top to distribute the load and enhance the deformation resistance. A reinforcing steel plate 3 is embedded inside the concrete layer 203, which can work synergistically to improve structural performance. Under concentrated loads, the embedded reinforcing steel plate 3 increases the contact area, disperses the peak stress, and prevents the concrete from crushing due to excessive local pressure. The reinforcing steel plate 3 also constrains the surface deformation of the concrete, inhibits concrete collapse under high pressure, and ensures effective load transfer. Multiple sets of positioning hollow frames 4 are embedded inside the lightweight foamed soil layer 202. Longitudinal anchor rods 1 and 2 501 sequentially penetrate the reinforcing steel plate 3 and the sleeves 401 in the positioning hollow frames 4 and anchor into the rock layer 201. The lower bent section is embedded in the rock layer 201, forming an integrated load-bearing system. This structure can improve the structural strength of the filling area, thereby enhancing the bearing capacity of the road surface and improving its stability.

[0029] All standard parts used in this application can be purchased from the market. The specific connection methods of each part adopt conventional methods such as bolts, rivets, and welding that are mature in the prior art. The machinery, parts and equipment adopt conventional models in the prior art and are also general components, which are common knowledge in this field.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A lightweight foamed concrete filling structure suitable for soft soil subgrade, comprising a subgrade pit (1), characterized in that: The roadbed pit (1) is filled with a roadbed filling body (2). The roadbed filling body (2) includes a rock layer (201), a foamed lightweight soil layer (202), and a concrete layer (203) from top to bottom. Multiple sets of equally spaced reinforcing steel plates (3) are laid side by side inside the concrete layer (203). Multiple sets of evenly distributed positioning hollow frames (4) are set inside the foamed lightweight soil layer (202) and at the corresponding positions of the reinforcing steel plates (3). Both ends of the positioning hollow frame (4) are welded with rod sleeves (401). The two sets of rod sleeves (401) are respectively inserted with longitudinal anchor bolt one (5) and longitudinal anchor bolt two (501).

2. The lightweight foamed concrete filling structure suitable for soft soil subgrade according to claim 1, characterized in that: The foamed lightweight soil layer (202) is laid on the rock layer (201) and typically has a density of 400–1200 kg / m³. 3 .

3. A lightweight foamed concrete filling structure suitable for soft soil subgrade according to claim 2, characterized in that: An HDPE geomembrane is laid between the rock layer (201) and the foamed lightweight soil layer (202).

4. A lightweight foamed concrete filling structure suitable for soft soil subgrade according to claim 2, characterized in that: The interior of the reinforcing steel plate (3) has multiple sets of assembly through holes for longitudinal anchor rod one (5) and longitudinal anchor rod two (501) to pass through. The reinforcing steel plate (3) is treated by sandblasting to remove rust. The reinforcing steel plate (3) is coated with epoxy structural adhesive on both sides and pressed into the interior of the concrete layer (203).

5. A lightweight foamed concrete filling structure suitable for soft soil subgrade according to claim 2, characterized in that: The top ends of the first longitudinal anchor (5) and the second longitudinal anchor (501) penetrate the top of the reinforcing steel plate (3) and are fixed by assembly bolts. The bottom ends of the first longitudinal anchor (5) and the second longitudinal anchor (501) are anchored into the interior of the rock stratum (201).

6. A lightweight foamed concrete filling structure suitable for soft soil subgrade according to claim 2, characterized in that: The bottom bending sections of the longitudinal anchor rod one (5) and the longitudinal anchor rod two (501) are bent in opposite directions.

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