Highway roadbed widening structure
By transforming the outer wall of the highway subgrade into stepped sections and inserting structural piles and anchor reinforcement bars, the problem of differential settlement between the old and new subgrades was solved, the connection strength was enhanced, pavement cracking was prevented, and the stability and traffic capacity of the widened subgrade structure were improved.
Patent Information
- Application Number
- CN202423152302.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-20
- Publication Date
- 2025-12-02
- Estimated Expiration
- 2034-12-20
AI Technical Summary
During the widening and reconstruction of existing highways, differential settlement between the old and new roadbeds has led to severe longitudinal cracking of the pavement, and existing technologies are unable to effectively solve this problem.
A highway subgrade widening structure is designed by transforming the outer wall of the original subgrade into a stepped section, inserting structural piles and anchor reinforcement bars, fixing the anchor bars and structural piles at an intersection, and pouring concrete on the outer diameter surface to enhance the connection strength between the old and new subgrades.
It effectively prevents differential settlement between the old and new roadbeds, avoids road surface cracking, and improves the stability and traffic capacity of the widened roadbed structure.
Smart Images
Figure CN223620737U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of highway construction technology, specifically to a highway roadbed widening structure. Background Technology
[0002] With the sustained and rapid development of the national economy, the demand for highway transportation in my country has been increasing year by year. The traffic flow of some existing expressways has reached saturation, and it is urgent to widen and renovate them to improve their traffic capacity and adapt to the needs of the rapid development of the modern economy. However, after years of use, the settlement and deformation of the original roadbed of the expressway has reached a stable state, while the roadbed fill material of the widened part will also undergo compression deformation and settlement deformation. This causes differential settlement between the old and new roadbeds, which in turn leads to serious longitudinal cracking of the pavement structure at the junction of the old and new roadbeds. Therefore, a widening structure is required when widening the road.
[0003] In view of this, there is an urgent need to design a highway subgrade widening structure. This involves transforming the outer wall of the existing subgrade into a stepped structure. Structural piles are inserted into the vertical plane of the stepped structure, with connecting holes drilled through the sidewalls of the piles. Anchor bolts are inserted into the horizontal plane of the stepped structure, and these anchor bolts are cross-fixed to the structural piles. Concrete is then poured onto the outer diameter surface of the stepped section. The fixation between the anchor bolts and structural piles enhances the connection strength between the original and new subgrades, preventing differential settlement that could lead to pavement cracking. Utility Model Content
[0004] To address the shortcomings of the existing technology, the present invention aims to provide a highway subgrade widening structure, comprising: an original subgrade, a stepped section, structural piles, anchor reinforcement bars, and a new subgrade. The stepped section is provided on the side wall of the original subgrade. The structural piles are inserted vertically into the stepped section, and the anchor reinforcement bars are inserted horizontally into the stepped section. The anchor reinforcement bars are intersected and fixed with the structural piles, and the new subgrade is cast outside the anchor reinforcement bars.
[0005] Furthermore, pile holes are provided in the vertical direction of the original roadbed, and anchor holes are provided in the horizontal direction of the original roadbed.
[0006] Furthermore, the stepped section is toothed, with the pile hole opened in the vertical direction of the stepped section and the anchor hole opened in the horizontal direction of the stepped section.
[0007] Furthermore, the structural pile includes: a pile body and insertion holes, wherein the insertion holes are equally spaced on the side wall of the pile body, and the insertion holes cooperate with the anchor rod reinforcing bars.
[0008] Furthermore, the anchor reinforcement passes through the anchor hole and is inserted into the insertion hole of the pile body, and the new roadbed is poured on the outside of the anchor reinforcement.
[0009] Furthermore, the new roadbed is made of poured concrete.
[0010] Beneficial effects:
[0011] This utility model provides a highway subgrade widening structure that transforms the outer wall of the original subgrade into a stepped structure. Structural piles are inserted into holes drilled in the vertical direction of the stepped structure, and connecting holes are drilled through the sidewalls of the structural piles. Anchor rods are inserted into holes drilled in the horizontal direction of the stepped structure, and the anchor rods are cross-fixed with the structural piles. Concrete is then poured onto the outer diameter surface of the stepped section. The fixation between the anchor rods and structural piles enhances the connection strength between the original and new subgrades, preventing differential settlement between the two subgrades that could lead to pavement cracking. Attached Figure Description
[0012] Figure 1 This is a schematic diagram of a highway subgrade widening structure according to the present invention.
[0013] The markings in the diagram are: 1-Original roadbed, 2-Step section, 3-Structural pile, 4-Anchor rod reinforcement, 5-New roadbed, 11-Pile hole, 12-Anchor hole, 31-Pile body, 32-Interlocking hole. Detailed Implementation
[0014] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. 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 are within the protection scope of the present utility model.
[0015] As shown in the figure, this utility model discloses a highway subgrade widening structure, including: original subgrade 1, stepped section 2, structural piles 3, anchor reinforcement 4, and new subgrade 5. The stepped section 2 is provided on the side wall of the original subgrade 1. The structural piles 3 are inserted into the vertical direction of the stepped section 2. The anchor reinforcement 4 is inserted into the horizontal direction of the stepped section 2. The anchor reinforcement 4 intersects and is fixed with the structural piles 3. The new subgrade 5 is poured on the outside of the anchor reinforcement 4.
[0016] In this embodiment, pile holes 11 are opened in the vertical direction of the original roadbed 1, and anchor holes 12 are opened in the horizontal direction of the original roadbed 1.
[0017] In this embodiment, the stepped section 2 is in the shape of stepped teeth, the pile hole 11 is opened in the vertical direction of the stepped section 2, and the anchor hole 12 is opened in the horizontal direction of the stepped section 2.
[0018] In this embodiment, the structural pile 3 includes a pile body 31 and a insertion hole 32. The insertion holes 32 are evenly spaced on the side wall of the pile body 31, and the insertion holes 32 cooperate with the anchor rod reinforcing bar 4.
[0019] In this embodiment, the anchor reinforcement 4 passes through the anchor hole 12 and is inserted into the insertion hole 32 of the pile body 31, and the new roadbed 5 is poured on the outside of the anchor reinforcement 4.
[0020] In this embodiment, the new roadbed 5 is made of concrete.
[0021] Working principle:
[0022] First, the original roadbed 1 was modified, and the sidewall of the original roadbed 1 was transformed into a toothed step, thus forming step section 2.
[0023] The original roadbed 1 has vertical pile holes 11, which are matched with structural piles 3, and the structural piles 3 can be inserted into the pile holes 11. The original roadbed 1 has horizontal anchor holes 12, which are matched with anchor rod reinforcing bars 4, and the anchor rod reinforcing bars 4 can be inserted into the anchor holes 12.
[0024] Among them, the stepped section 2 is in the shape of stepped teeth, and pile holes 11 are also opened in the vertical direction of the stepped section 2. The pile holes 11 are matched with the structural piles 3. Anchor holes 12 are also opened in the horizontal direction of the stepped section 2. The anchor holes 12 are matched with the anchor rod reinforcing bars 4.
[0025] The structural pile 3 consists of a pile body 31 and a splice hole 32. The splice hole 32 is provided on the side wall of the pile body 31, and the anchor rod reinforcing bar 4 passes through the anchor hole 12 and intersects with the pile body 31 for fixation.
[0026] Among them, the outer wall of the anchor reinforcement 4 is filled with new roadbed 5, which is made of concrete.
[0027] This utility model provides a highway subgrade widening structure, which transforms the outer wall of the original subgrade into a stepped section 2 structure. Structural piles 3 are inserted into the vertical surface of the stepped section 2 structure, and connecting holes are drilled through the sidewalls of the structural piles 3. Anchor rods are inserted into the horizontal surface of the stepped section 2 structure, and the anchor rods are cross-fixed with the structural piles 3. Concrete is poured onto the outer diameter surface of the stepped section 2. The fixation between the anchor rods and the structural piles 3 enhances the connection strength between the original subgrade 1 and the new subgrade 5, preventing differential settlement between the original subgrade 1 and the new subgrade 5 that could lead to pavement cracking.
[0028] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A highway subgrade widening structure, comprising: The original roadbed (1), stepped section (2), structural pile (3), anchor reinforcement (4) and new roadbed (5) are characterized in that the stepped section (2) is provided on the side wall of the original roadbed (1), the structural pile (3) is inserted in the vertical direction of the stepped section (2), the anchor reinforcement (4) is inserted in the horizontal direction of the stepped section (2), the anchor reinforcement (4) is intersected and fixed with the structural pile (3), and the new roadbed (5) is poured on the outside of the anchor reinforcement (4).
2. The highway subgrade widening structure according to claim 1, characterized in that, The original roadbed (1) has pile holes (11) in the vertical direction and anchor holes (12) in the horizontal direction.
3. The highway subgrade widening structure according to claim 2, characterized in that, The stepped section (2) is in the shape of stepped teeth. The pile hole (11) is opened in the vertical direction of the stepped section (2), and the anchor hole (12) is opened in the horizontal direction of the stepped section (2).
4. The highway subgrade widening structure according to claim 3, characterized in that, The structural pile (3) includes a pile body (31) and a plug hole (32). The plug holes (32) are provided at equal intervals on the side wall of the pile body (31). The plug holes (32) cooperate with the anchor rod reinforcing bar (4).
5. A highway subgrade widening structure according to claim 4, characterized in that, The anchor reinforcement (4) passes through the anchor hole (12) and is inserted into the insertion hole (32) of the pile body (31). The new roadbed (5) is poured on the outside of the anchor reinforcement (4).
6. The highway subgrade widening structure according to claim 5, characterized in that, The new roadbed (5) is made of concrete.