Cantilever widening structure of existing retaining wall of mountain road
By adopting the cantilever widening method of cantilevered reinforced concrete structures and reinforcement components on mountain roads, the problems of large-scale mountain road projects and serious environmental damage were solved, and the safe, economical and green widening of the highway was achieved.
Patent Information
- Application Number
- CN202422864943.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-09-30
- Estimated Expiration
- 2034-11-22
AI Technical Summary
In mountain highway construction, existing technical solutions lead to problems such as excessive project scale, serious environmental damage, and high safety risks. Especially in mountainous areas with strongly developed geological structures, conventional inner mountain excavation, outer slope excavation, and new retaining wall widening methods have many problems.
A cantilever reinforced concrete structure is adopted, combined with embedded reinforcement, cantilever longitudinal reinforcement and circumferential reinforcement, anchor rods and other components to form a cantilever structure. The existing retaining wall is cantilevered and widened, with a cantilever width of less than 2m. Combined with flanges and guardrail columns, the structural stability and bearing capacity are improved.
Without causing large-scale damage to the environment or adding new land, the highway's traffic capacity and safety have been improved, the damage to the surrounding environment caused by construction has been reduced, the requirements of safety, economy and green environmental protection have been met, and the project cost has been reduced.
Smart Images
Figure CN223398156U_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the technical field of roadbed construction, and in particular to a cantilevered widening structure of an existing retaining wall on a mountain highway. Background Art
[0002] During the construction of mountain roads, existing roads are often built along the mountainside, with steep slopes above and below, and the road width is relatively narrow. With the continuous development of the economy, the traffic capacity of existing roads has become unable to meet the actual demand. The problem of insufficient traffic capacity is usually solved by widening the existing roads along the road.
[0003] However, in mountainous areas with strongly developed geological structures, the inner mountains are tall and steep. If excavation is carried out on the inner mountains, the height of the slope excavation will be very high, which will have a great impact on the environment and easily form a large number of artificially disturbed unfavorable geological bodies; if the outer slope excavation is adopted, a steep slope high fill embankment with a fill height of tens of meters will be formed, which will not only increase the new land area, but also pose a great safety hazard; if a new retaining wall is added on the outside to achieve widening, the height of the retaining wall will increase significantly, resulting in an excessively large project scale.
[0004] Based on the above situation, and taking into account the requirements of safety, economy, and green environmental protection, this application proposes a cantilevered widening structure for existing retaining walls on mountain roads. Utility Model Content
[0005] The main purpose of the utility model is to provide a structure for widening existing retaining walls on mountain roads, which can effectively solve the problem in the background technology that the height of the outer retaining wall increases sharply due to widening of the retaining wall, resulting in a large project scale.
[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0007] A cantilevered widening structure of an existing retaining wall on a mountain highway, comprising an existing retaining wall, embedded reinforcement and cantilevered reinforced concrete;
[0008] A chiseled portion is provided on the upper portion of the existing retaining wall, and cantilever reinforced concrete is poured at the chiseled portion, and its width exceeds the chiseled portion to form a cantilever structure, and embedded steel bars connect the cantilever reinforced concrete to the existing retaining wall.
[0009] Furthermore, it also includes cantilever longitudinal reinforcement and cantilever circumferential reinforcement arranged in the cantilever reinforced concrete.
[0010] Furthermore, it also includes anchor rods for anchoring the existing retaining wall to the foundation.
[0011] Furthermore, it also includes guardrail embedded bolts embedded in the cantilever reinforced concrete.
[0012] Furthermore, it also includes a flange composed of an upper flange and a lower flange. The lower flange is cast together with the cantilevered reinforced concrete. The upper flange and the lower flange are fixed by anchor nuts and guardrail embedded bolts.
[0013] Furthermore, it also includes a guardrail column welded and fixed to the upper flange and a reinforcing rib arranged at the column foot of the guardrail column.
[0014] Furthermore, the existing retaining wall is located outside the highway.
[0015] Furthermore, the cantilever width of the cantilever reinforced concrete is less than 2m, and its height and shape are precisely controlled according to design requirements.
[0016] Furthermore, the number, diameter and arrangement of the cantilever longitudinal reinforcement are designed according to the stress conditions of the cantilevered part.
[0017] Furthermore, the spacing and diameter of the cantilever circumferential reinforcement are designed according to the size and stress conditions of the cantilevered part.
[0018] Compared with the existing technology, this application has achieved the following technical effects:
[0019] It solves the problem of widening mountain roads due to insufficient traffic capacity, especially in mountainous areas with strongly developed geological structures and complex terrain. It avoids many problems caused by conventional inner mountain excavation, outer slope excavation and new retaining wall widening methods, such as environmental damage, large amount of additional land, high safety hazards and large project scale.
[0020] By using the existing retaining wall for cantilever widening, the structural stability and bearing capacity are improved while reducing the damage and interference of construction to the surrounding environment. This meets the requirements of safety, economy and green environmental protection and saves project costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0021] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.
[0022] Figure 1 This is an overall schematic diagram of the cantilevered widening structure of the existing retaining wall of the mountain highway in this application.
[0023] Figure 2 This is a partial enlarged view of the cantilevered widening structure of the existing retaining wall of the mountain highway in this application.
[0024] The markings in the figure are as follows:
[0025] 1-Existing retaining wall; 2-Anchoring; 3-Removal of existing retaining wall and re-casting of reinforced concrete; 4-Cantilever longitudinal reinforcement; 5-Cantilever circumferential reinforcement; 6-Guardrail embedded bolts; 7-Flange; 8-Reinforced rib; 9-Guardrail column; 10-Anchor nut; 11-Cantilever widening reinforced concrete; 12-Anchor rod; B-Existing road width; L-Widen cantilever width (L<2m) DETAILED DESCRIPTION
[0026] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.
[0027] A cantilevered widening structure of an existing retaining wall on a mountain highway, characterized by comprising an existing retaining wall 1, embedded steel bars 2, and cantilevered reinforced concrete 11;
[0028] A chiseled portion 3 is provided on the upper portion of the existing retaining wall 1 , and cantilevered reinforced concrete 11 is poured at the chiseled portion 3 , and its width exceeds the chiseled portion 3 to form a cantilever structure, and embedded steel bars 2 connect the cantilevered reinforced concrete 11 to the existing retaining wall 1 .
[0029] In the embodiment of the present application, cantilever longitudinal reinforcement 4 and cantilever circumferential reinforcement 5 are also included, which are arranged in the cantilever reinforced concrete 11 .
[0030] In the embodiment of the present application, anchor rods 12 are also included to anchor the existing retaining wall 1 to the foundation.
[0031] In the embodiment of the present application, guardrail embedded bolts 6 embedded in the cantilever reinforced concrete 11 are also included.
[0032] In an embodiment of the present application, a flange 7 consisting of an upper flange and a lower flange is also included. The lower flange is cast together with the cantilevered reinforced concrete 11. The upper flange and the lower flange are fixed to the guardrail embedded bolts 6 through anchor nuts 10.
[0033] In the embodiment of the present application, it also includes a guardrail column 9 welded and fixed to the upper flange and a reinforcing rib 8 arranged at the column foot of the guardrail column 9.
[0034] In the embodiment of the present application, the cantilever width of the cantilever reinforced concrete 11 is less than 2m, and its height and shape are precisely controlled according to design requirements.
[0035] In the embodiment of the present application, the number, diameter and arrangement of the cantilever longitudinal reinforcement 4 are designed according to the stress conditions of the cantilevered part.
[0036] In the embodiment of the present application, the spacing and diameter of the cantilever circumferential reinforcement 5 are designed according to the size and stress conditions of the cantilevered part.
[0037] In one embodiment of the present application, a flange 7 consisting of an upper flange and a lower flange is further included. The lower flange is cast together with the cantilevered reinforced concrete 11. The upper flange and the lower flange are fixed to the guardrail embedded bolts 6 through anchor nuts 10.
[0038] In one embodiment of the present application, a guardrail column 9 is further included. The guardrail column 9 and the reinforcing rib 8 are welded and fixed to the upper flange, wherein the reinforcing rib 8 is arranged at the column foot of the guardrail column 9.
[0039] The present application is applicable to the situation where the existing retaining wall 1 is arranged on the outside of the highway, that is, on the downhill side of the mountain of the highway.
[0040] Through the synergistic effect of the above-mentioned components, this application effectively achieves the widening of the highway without large-scale destruction of the mountain or excessive increase of land, and significantly improves the highway's traffic capacity and safety.
[0041] The construction methods of this application include:
[0042] First, the chiseled portion 3 within a certain height range on the upper portion of the existing retaining wall 1 is chiseled away to ensure that the chiseled surface is flat and meets the design requirements.
[0043] Next, drilling and planting reinforcement 2 are performed in the chiseled portion 3 to prepare for the subsequent connection of the cantilever reinforced concrete 11. Then, the cantilever longitudinal reinforcement 4 and the cantilever circumferential reinforcement 5 are tied according to the design requirements.
[0044] Place the guardrail embedded anchor bolts 6 and the lower flange accurately in the predetermined position.
[0045] Afterwards, the concrete of the cantilevered portion is integrally poured to form the cantilevered reinforced concrete 11 . During the pouring process, the quality of the concrete and the pouring process must be strictly controlled to ensure the strength and density of the cantilevered reinforced concrete 11 .
[0046] After the cantilever reinforced concrete 11 reaches a certain strength, the guardrail columns 9 and the reinforcing ribs 8 are welded to the upper flange, and the upper and lower flanges are fixed to the embedded anchor bolts through the anchor nuts 10, so that the guardrail is firmly installed on the cantilever reinforced concrete body 11.
[0047] At the same time, anchor rods 12 are constructed on the existing retaining wall to enhance the anti-overturning stability of the retaining wall structure. The timing of constructing the anchor rods 12 can be selected before step 1 according to actual conditions.
[0048] During the entire construction process, the height and shape of the cantilevered reinforced concrete 11 should be precisely controlled in strict accordance with the design requirements to ensure that the connection between the re-poured reinforced concrete and the existing retaining wall 1 is firm and reliable.
[0049] The number, diameter and arrangement of the cantilever longitudinal reinforcement 4, as well as the spacing and diameter of the cantilever circumferential reinforcement 5, should be scientifically and reasonably designed according to the specific stress conditions of the cantilever part, so as to effectively ensure the bearing capacity of the cantilever reinforced concrete 11.
[0050] Furthermore, the existing retaining wall 1 is positioned on the downslope side of the mountain outside the highway. This arrangement helps improve the stability and safety of the highway. The present invention's existing retaining wall cantilevered widening structure for mountain highways effectively widens the highway, improving its capacity and safety, without extensively damaging the mountain or adding excessive land. The cantilevered reinforced concrete 11 has a width of less than 2 meters, meeting widening requirements while ensuring structural stability.
[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A cantilevered widening structure for an existing retaining wall on a mountain highway, characterized in that: It includes an existing retaining wall (1), embedded steel bars (2) and cantilevered reinforced concrete (11); A chiseled portion (3) is provided on the upper portion of the existing retaining wall (1), and cantilevered reinforced concrete (11) is poured at the chiseled portion (3), and its width exceeds the chiseled portion (3) to form a cantilever structure, and embedded steel bars (2) connect the cantilevered reinforced concrete (11) and the existing retaining wall (1).
2. The cantilevered widening structure of an existing retaining wall on a mountain highway according to claim 1 is characterized in that: It also includes cantilever longitudinal reinforcement (4) and cantilever circumferential reinforcement (5) arranged in the cantilever reinforced concrete (11).
3. The cantilevered widening structure of an existing retaining wall on a mountain highway according to claim 1 is characterized in that: It also includes anchor rods (12) for anchoring the existing retaining wall (1) on the foundation.
4. The cantilevered widening structure of an existing retaining wall on a mountain highway according to claim 1 is characterized in that: It also includes guardrail embedded bolts (6) embedded in the cantilever reinforced concrete (11).
5. The cantilevered widening structure of an existing retaining wall on a mountain highway according to claim 4 is characterized in that: It also includes a flange (7) composed of an upper flange and a lower flange. The lower flange is cast together with the cantilever reinforced concrete (11). The upper flange and the lower flange are fixed with the guardrail embedded bolts (6) through anchor nuts (10).
6. The cantilevered widening structure of an existing retaining wall on a mountain highway according to claim 5 is characterized in that: It also includes a guardrail column (9) welded and fixed to the upper flange and a reinforcing rib (8) arranged at the column foot of the guardrail column (9).
7. The cantilevered widening structure of an existing retaining wall on a mountain highway according to claim 1 is characterized in that: The existing retaining wall (1) is located outside the highway.
8. The cantilevered widening structure of an existing retaining wall on a mountain highway according to claim 1 is characterized in that: The cantilevered reinforced concrete (11) has a cantilever width of less than 2m, and its height and shape are precisely controlled according to design requirements.
9. The cantilevered widening structure of an existing retaining wall on a mountain highway according to claim 2 is characterized in that: The number, diameter and arrangement of the cantilever longitudinal reinforcement (4) are designed according to the stress conditions of the cantilevered part.
10. The cantilevered widening structure of an existing retaining wall on a mountain highway according to claim 2 is characterized in that: The spacing and diameter of the cantilevered circumferential reinforcement (5) are designed according to the size and stress conditions of the cantilevered part.