Novel highway embankment widening structure

Abstract

A novel highway embankment widening structure is characterized in that an L-shaped check block (2) is arranged on one side or two sides of an old road shoulder before transformation, the L-shaped check block (2) is of a reinforced concrete structure formed by integrally casting a side wall (201) and a bottom plate (202) in situ, the bottom plate (202) is borne in an old road bed (1), the inner side of the side wall (201) intersects with the narrowest point of an old road surface (3), and the bottom plate (202) is arranged on the side wall (201). A filling space (4) is formed between the inner side surface of the side wall (201) and the innermost side of the bottom plate (202) and between the bottom plate (202) and the surface, not connected with the side wall (201), of the bottom plate (202), the filling space (4) is filled with a filling material matched with the material of the old road surface (3). Due to the arrangement of the L-shaped check block, the whole device can be used for binding steel bars and concrete on site, the construction is convenient and simple, and the construction speed is high.

Description

Technical Field

[0001] This utility model relates to the field of civil engineering highway technology, and in particular to a technology for the renovation of old embankments, specifically a new type of highway embankment widening structure. Background Technology

[0002] With the rapid development of the economy and society, local roads built in the early stages have gradually become unable to meet the requirements of mixed pedestrian and non-motorized traffic or driving comfort after more than ten years of operation. Therefore, it is necessary to widen the roadbed and renovate the pavement at the same time.

[0003] In engineering practice, highway embankment widening is generally carried out using either double-sided or single-sided widening. Double-sided widening is further divided into double-sided equal-width widening and double-sided unequal-width widening. According to conventional experience or practice, when the widening width is greater than 1.5m, it can be achieved by excavating steps and then backfilling and sloping. However, when the widening width is less than 1.5m, in order to ensure the minimum construction width for machinery, it is often necessary to construct an extra-wide embankment on the outside of the existing road and then cut the slope. However, this method requires additional land acquisition and demolition, and the extra-wide embankment needs to be excavated later, wasting resources, increasing costs, and failing to reflect the concept of green and sustainable development.

[0004] Therefore, how to provide a road embankment widening structure and construction method that does not require additional land occupation and demolition, avoids resource waste, overcomes differential settlement, is easy to construct, and has a reasonable cost is one of the technical problems that urgently need to be solved in this field. Utility Model Content

[0005] The purpose of this utility model is to address the problem that when the existing embankment widening width is less than 1.5m, in order to ensure the minimum construction width for machinery, the method of filling the roadbed with extra width on the outside of the old road and then cutting the slope is often adopted. This method requires additional land use and demolition, and the extra-wide roadbed needs to be excavated later, which wastes resources, increases costs, and does not reflect green and sustainable development. The present invention designs a new embankment widening structure that can achieve the goal of widening the roadbed without the need for additional land use and saves resources and costs by using L-shaped blocks.

[0006] The technical solution of this utility model is:

[0007] A novel highway embankment widening structure includes an old roadbed 1, with an old road subgrade 5 at the bottom and an old road surface 3 at the top. The highway embankment, composed of the old road surface 3, the old roadbed 1, and the old road subgrade 5, has sloping sides. Its key feature is that L-shaped blocks 2 are symmetrically installed on one or both sides of the old road shoulder before reconstruction. The L-shaped blocks 2 are reinforced concrete structures integrally cast from sidewalls 201 and a base plate 202. The base plate 202 is supported in the old roadbed 1. The inner side of the sidewall 201 intersects with the narrowest point of the old road surface 3 (i.e., the inner side of the sidewall 201 should intersect with the widened road surface). A filling space 4 is formed between the inner side of the sidewall 201, the innermost side of the base plate 202, and the surface of the base plate 202 not connected to the sidewall 201 to facilitate the installation of the L-shaped blocks 2. The filling space 4 is filled with a filling material compatible with the material of the old road surface 3.

[0008] Preferably, the L-shaped stop is a cast-in-place reinforced concrete structure, consisting of side walls and a bottom slab forming an L-shape.

[0009] Preferably, the outer edge of the top of the L-shaped block sidewall is aligned with the outer edge of the top of the roadbed after widening. The width of the sidewall is controlled according to the shoulder of the new road after widening the old road. The top surface of the sidewall is controlled to be 1-2 cm lower than the shoulder of the new road. The depth of the sidewall is controlled according to the top of the old roadbed.

[0010] Preferably, the L-shaped block base plate is connected to the bottom of the side wall, and the inner edge of the base plate is determined according to the width of the old roadbed, with a minimum of 175cm. The thickness of the base plate can be controlled at 22cm.

[0011] Preferably, the concrete in the L-shaped stop is C30 cement concrete, and the reinforcing bars are composed of load-bearing reinforcing bars and structural reinforcing bars, numbered ① to ⑤.

[0012] Preferably, when a crash barrier is required, a corrugated beam barrier can be installed by pre-embedding a guardrail post sleeve 203 in the side wall of the L-shaped block; the height of the sleeve is controlled according to the height of the side wall of the L-shaped block, the sleeve diameter should be 4 to 10 cm wider than the post diameter, and reinforcing ribs are arranged around the sleeve.

[0013] The present invention achieves the following technical advantages over the prior art:

[0014] 1) This utility model directly sets L-shaped blocks on the outside of the old roadbed, without requiring additional land occupation or demolition;

[0015] 2) This utility model avoids the waste caused by excavation after the roadbed is filled with excessive width, saves costs and conserves resources;

[0016] 3) This utility model can effectively reduce the differential settlement between new and old roadbeds by directly setting L-shaped blocks on the old roadbed that has been in operation and compacted for many years;

[0017] 4) By setting up L-shaped blocks, the entire structure can be tied with steel bars and concrete poured on site, making construction convenient, simple, and fast. Attached Figure Description

[0018] Figure 1 This is a structural diagram of an existing highway before it was widened and upgraded.

[0019] Figure 2 This is a schematic diagram of the structure after widening and modifying an existing highway using a novel highway embankment widening structure based on this utility model.

[0020] Figure 3 This is a structural design drawing of the L-shaped stop block in this utility model.

[0021] Figure 4 This is a detailed drawing of the reinforcing steel bars in the L-shaped stop block of this utility model.

[0022] Figure 5 This is a schematic diagram of the elevation structure of the guardrail post sleeve embedded in the L-shaped stop block in this utility model.

[0023] Figure 6 This is a schematic diagram of the planar structure of the guardrail post sleeve embedded in the L-shaped stop block in this utility model.

[0024] In the diagram: 1. Old roadbed; 2. L-shaped retaining block; 201. Side wall; 202. Base plate; 203. Embedded guardrail post sleeve; 3. Old road surface; 4. Filled space; 5. Old roadbed; 6. Existing river protection slope structure; 7. Newly built earthen shoulder; 8. Newly built carriageway; 9. Old road carriageway; 10. Road centerline; 11. Old road earthen shoulder. Detailed Implementation

[0025] 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. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Reference Figure 2-6 As shown.

[0027] A novel highway embankment widening structure includes an old roadbed 1, with an old road subgrade 5 at the bottom and an old road surface 3 at the top. The highway embankment, composed of the old road surface 3, the old roadbed 1, and the old road subgrade 5, has sloping sides. Before the reconstruction, L-shaped blocks 2 are symmetrically installed on one or both sides of the old road shoulder. Figure 2The L-shaped block 2 is a reinforced concrete structure integrally cast in place from the side wall 201 and the base plate 202 (it can also be symmetrically set on both sides according to the width requirements during implementation). Figure 3 As shown, the base plate 202 is supported in the old roadbed 1, and the inner side of the side wall 201 intersects with the narrowest point of the old road surface 3, as shown. Figure 2 As shown, a filling space 4 is formed between the inner side of the side wall 201, the innermost side of the base plate 202, and the surface of the base plate 202 that is not connected to the side wall 201, to facilitate the installation of the L-shaped stop 2. The filling space 4 is filled with a filling material that matches the material of the old road surface 3, forming part of the new road surface. In specific implementation, as needed, green soil can be laid on the surface of the side wall 201 of the L-shaped stop 2 to form a new earthen shoulder 7.

[0028] In this embodiment, the L-shaped block 2 includes a side wall 201, a base plate 202 disposed at the bottom of the side wall 201, and a sleeve 203 embedded in the side wall 201.

[0029] In this embodiment, the L-shaped stop block 2 is a cast-in-place structure; the bottom of the side wall 201 is rigidly connected to the base plate 202; the pre-embedded guardrail post sleeve 203 is set inside the side wall 201, such as... Figure 3 As shown. The structure and dimensions of the pre-embedded guardrail post sleeve 203 are as follows. Figure 5 , Figure 6 As shown.

[0030] In this embodiment, the side wall 201 is embedded in the shoulder of the new road after the old road is widened; the top surface of the side wall 201 is controlled to be 1-2cm lower than the shoulder of the new road; the bottom surface of the side wall 201 is flush with the top surface of the old roadbed 1.

[0031] In this embodiment, the base plate 202 is embedded in the old roadbed 1; the top surface of the base plate 202 is flush with the top surface of the old roadbed 1.

[0032] In this embodiment, the hollow portion between the L-shaped block 2 and the old road surface 3 is determined by the old road surface renovation plan to fill the road surface 4.

[0033] In this embodiment, the L-shaped blocks 2 are reserved with expansion joints at 15m intervals. The size setting and calculation of the expansion joints are the same as those in the existing technical manual.

[0034] In this embodiment, the L-shaped stop 2 is a cast-in-place reinforced concrete structure with a concrete strength grade controlled at no less than C30, and internally reinforced with HRB400 and HPB300 steel bars. The steel reinforcement structure and dimensions are as follows: Figure 4 As shown.

[0035] The construction method of this utility model includes the following steps:

[0036] S1: Remove the old road shoulder and break the edge of the pavement structure layer within one or both sides of the old road shoulder;

[0037] S2: Lay out the top edge line of the widened roadbed. This edge line is the outer edge line of the L-shaped block. Based on the structural width of the L-shaped block, continue to lay out the inner edge line of the L-shaped block.

[0038] S3: Based on the inner and outer edge lines of the L-shaped block laid out, excavate the foundation trench for the old roadbed, and control the excavation depth according to the thickness of the bottom plate of the L-shaped block.

[0039] S4: Erect formwork and tie steel bars according to the drawings, and finally pour C30 cement concrete. The length of the L-shaped blocks is reserved for expansion joints at 15m intervals.

[0040] S5: Determine the filling scheme in the filling space between the old road surface structure and the L-shaped retaining block sidewall, in conjunction with the old road surface renovation plan (the filling materials and sequence can be implemented with reference to conventional road construction specifications).

[0041] Preferably, the L-shaped block base plate 202 can be treated by setting a crushed stone cushion layer to meet the requirements of the base bearing capacity.

[0042] Preferably, the top of the L-shaped block sidewall 201 can be treated by setting a customized greening trough and pre-embedded guardrail post sleeves to meet the needs of greening and safety.

[0043] The above description is merely a preferred embodiment of the present utility model and does not constitute any limitation on the technical scope of the present utility model. Therefore, any minor modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present utility model shall still fall within the scope of the technical solution of the present utility model.

[0044] The parts not covered by this utility model are the same as or can be implemented using existing technology.

Claims

1. A novel highway embankment widening structure, comprising an old roadbed (1), the lower part of which is an old roadbed (5), and the upper part of which is an old road surface (3), wherein the highway embankment composed of the old road surface (3), the old roadbed (1), and the old roadbed (5) has sloping sides, characterized in that: Before the renovation, L-shaped blocks (2) are installed on one or both sides of the old road shoulder. The L-shaped blocks (2) are reinforced concrete structures formed by integral casting of side wall (201) and base plate (202). The base plate (202) is supported in the old road subgrade (1). The inner side of the side wall (201) intersects with the narrowest point of the old road surface (3). A filling space (4) is formed between the inner side of the side wall (201), the innermost side of the base plate (202), and the surface of the base plate (202) that is not connected to the side wall (201) to facilitate the installation of the L-shaped blocks (2). The filling space (4) is filled with filling material that matches the material of the old road surface (3).

2. The novel highway embankment widening structure according to claim 1, characterized in that: The outer edge of the top of the L-shaped retaining block sidewall is aligned with the outer edge of the top of the roadbed after widening. The width of the sidewall is controlled according to the new road shoulder after widening the old road. The top surface of the sidewall is controlled to be 1-2cm lower than the new road shoulder. The burial depth of the sidewall is controlled according to the top of the old roadbed.

3. The novel highway embankment widening structure according to claim 1, characterized in that: The L-shaped block base plate is connected to the bottom of the side wall. The inner edge of the base plate is determined according to the width of the old roadbed, with a minimum control of 175cm. The thickness of the base plate is controlled at 22cm.

4. The novel highway embankment widening structure according to claim 1, characterized in that: The L-shaped blocks are made of C30 cement concrete, and the reinforcing steel consists of load-bearing steel bars and structural steel bars.

5. The novel highway embankment widening structure according to claim 1, characterized in that: The L-shaped block sidewall is equipped with a crash barrier, which is formed by pre-embedding a guardrail post sleeve (203) in the L-shaped block sidewall. The height of the sleeve is controlled according to the height of the L-shaped block sidewall, and the sleeve diameter should be 4 to 10 cm wider than the post diameter. Reinforcing ribs are arranged around the sleeve.

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