Cantilever widening structure of existing retaining wall and construction method of cantilever widening structure
By implementing a cantilevered wide-size structure on the existing retaining walls of mountain highways, the problem of insufficient traffic capacity of existing roads has been solved, the traffic capacity and safety have been improved, environmental damage and land use demand have been reduced, and safety, economy and green have been achieved. Environmentally friendly construction effect.
Patent Information
- Application Number
- CN202411683479.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-22
- Publication Date
- 2025-02-11
AI Technical Summary
In the construction of mountainous highways, the traffic capacity of existing roads is insufficient, and the conventional inner mountain excavation, outer slope excavation and new retaining wall width schemes have problems such as environmental damage, increased land use and safety hazards.
The existing retaining wall cantilever width structure is adopted. By chiseling and cantilever reinforced concrete pouring on the upper part of the existing retaining wall, combined with cantilever longitudinal and annular reinforcement, planting reinforcement and anchor rods to enhance structural stability and load bearing capacity. .
It effectively improves the traffic capacity and safety of highways, reduces the environmental damage and land use demands caused by construction, and complies with the requirements of safety, economy and green environmental protection.
Smart Images
Figure CN119411627A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of roadbed construction, and in particular to a cantilevered widening structure of an existing retaining wall of a mountain highway and a construction method thereof. Background Art
[0002] In the construction of mountain roads, existing roads are often built along the mountain, with steep slopes above and below and narrow width. With the development of the economy, the traffic capacity of existing roads can no longer meet the demand, and the solution of widening along the existing roads is usually adopted to solve the problem of insufficient traffic capacity.
[0003] However, in mountainous areas with strongly developed geological structures, the inner mountain is high and steep. If excavation is carried out on the inner mountain, the slope excavation height will be 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 side is excavated with slope reduction, a steep slope high-fill embankment with a fill height of up to tens of meters will be formed, the additional land will be large and there will be great safety hazards; if the outer side is widened by adding a new retaining wall, the height of the retaining wall will increase sharply, resulting in a large project scale.
[0004] Based on the above situation and taking into account the requirements of safety, economy and green environmental protection, the present invention proposes a cantilevered widening structure of an existing retaining wall of a mountain highway and a construction method thereof. Summary of the invention
[0005] The main purpose of the present invention 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] To achieve the above object, the technical solution adopted by the present invention is:
[0007] A cantilever widening structure of an existing retaining wall on a mountain highway, comprising an existing retaining wall, embedded reinforcement, cantilever reinforced concrete, cantilever longitudinal reinforcement, cantilever circumferential reinforcement and anchor rods;
[0008] The chiseled portion within a certain height range on the upper part of the existing retaining wall is chiseled out, and the cantilever reinforced concrete is poured at the position of the chiseled portion. The width of the cantilever reinforced concrete exceeds the width of the chiseled portion to form a cantilever structure. The cantilever longitudinal reinforcement and the cantilever circumferential reinforcement are poured in the cantilever reinforced concrete. The embedded reinforcement connects the cantilever reinforced concrete with the existing retaining wall at the position of the chiseled portion, and the anchor rods anchor the existing retaining wall to the foundation; the cantilever width of the cantilever reinforced concrete is less than 2m.
[0009] Furthermore, it also includes guardrail embedded bolts, and the guardrail embedded bolts are embedded in the cantilever reinforced concrete.
[0010] Furthermore, it also includes a flange, which is composed of an upper flange and a lower flange. The lower flange is cast together with the cantilever reinforced concrete, and the upper flange and the lower flange are fixed by anchor nuts and guardrail embedded bolts.
[0011] Furthermore, it also includes guardrail posts, and the guardrail posts and reinforcing ribs are welded and fixed to the upper flange.
[0012] Furthermore, the reinforcing ribs are arranged at the column base of the guardrail column.
[0013] Furthermore, the existing retaining wall is arranged on the outside of the highway, that is, on the downhill side of the mountain of the highway.
[0014] Furthermore, the height and shape of the cantilevered reinforced concrete should be precisely controlled according to design requirements to ensure that the re-poured reinforced concrete is firmly connected to the existing retaining wall.
[0015] Furthermore, the number, diameter and arrangement of the cantilever longitudinal reinforcement should be designed according to the stress conditions of the cantilevered part to ensure the bearing capacity of the cantilevered reinforced concrete.
[0016] Furthermore, the spacing and diameter of the cantilever circumferential reinforcement should be designed according to the size and stress conditions of the cantilevered part to ensure the bearing capacity of the cantilevered reinforced concrete.
[0017] The present application also claims protection for a construction method for the cantilevered widening structure of an existing retaining wall on a mountain highway as described above, which is applicable to a situation where a retaining wall is arranged on the outside of an existing highway, and comprises the following steps:
[0018] Step 1: Chisel off a certain height of the upper part of the existing retaining wall;
[0019] Step 2: Drill holes and plant reinforcement at the top of the existing retaining wall after it has been chiseled off;
[0020] Step 3: Tie cantilever longitudinal reinforcement and cantilever circumferential reinforcement;
[0021] Step 4: Place the embedded guardrail anchor bolts and lower flange;
[0022] Step 5: integrally pouring the concrete of the cantilevered part to form cantilevered reinforced concrete;
[0023] Step 6: Weld the guardrail column, the reinforced rib and the upper flange, and then fix the upper and lower flanges with anchor nuts and pre-buried anchor bolts;
[0024] Step 7: Construct anchor rods on the existing retaining wall. This step can also be implemented before step 1.
[0025] Compared with the prior art, this application has achieved the following technical effects:
[0026] 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.
[0027] By using the existing retaining wall for cantilever widening, the structural stability and bearing capacity are improved while reducing the damage and interference to the surrounding environment caused by construction. This meets the requirements of safety, economy and green environmental protection and saves project costs. BRIEF DESCRIPTION OF THE DRAWINGS
[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces 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 invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0029] Figure 1 It is an overall schematic diagram of the cantilevered widening structure of an existing retaining wall on a mountain highway according to the present invention.
[0030] Figure 2 It is a partial enlarged view of the cantilevered widening structure of the existing retaining wall of the mountain highway of the present invention.
[0031] The markings in the figure are as follows:
[0032] 1-existing retaining wall; 2-embedded reinforcement; 3-remove part of the existing retaining wall and re-pour reinforced concrete; 4-cantilever longitudinal reinforcement; 5-cantilever circumferential reinforcement; 6-guardrail embedded bolts; 7-flange; 8-reinforced ribs; 9-guardrail column; 10-anchor nut; 11-cantilever widening reinforced concrete; 12-anchor rod; B-existing road width; L-widened cantilever width (L<2m) DETAILED DESCRIPTION
[0033] In order to make the purpose, technical solution and advantages of the embodiments of the present invention clearer, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.
[0034] like Figure 1 and Figure 2As shown, in the specific implementation of the present invention, the cantilever widening structure of the existing retaining wall of the mountain highway involved includes: an existing retaining wall 1, embedded reinforcement 2, cantilever reinforced concrete 11, cantilever longitudinal reinforcement 4, cantilever circumferential reinforcement 5 and anchor rod 12. The chiseled portion 3 within a certain height range on the upper part of the existing retaining wall 1 is chiseled out, and then the cantilever reinforced concrete 11 is cast at this position, and its width exceeds the chiseled portion 3 to form a cantilever structure. The cantilever longitudinal reinforcement 4 and the cantilever circumferential reinforcement 5 are cast in the cantilever reinforced concrete 11, and the cantilever reinforced concrete 11 is connected to the existing retaining wall 1 at the chiseled portion 3 by the embedded reinforcement 2, and the anchor rod 12 anchors the existing retaining wall 1 to the foundation, and the cantilever width of the cantilever reinforced concrete 11 is less than 2m.
[0035] In one embodiment of the present application, it also includes guardrail embedded bolts 6 embedded in the cantilever reinforced concrete 11.
[0036] In one embodiment of the present application, it also includes a flange 7 composed of an upper flange and a lower flange. 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.
[0037] In one embodiment of the present application, it also includes a guardrail column 9, and the guardrail column 9 and the reinforcing ribs 8 are welded and fixed to the upper flange, wherein the reinforcing ribs 8 are arranged at the column foot of the guardrail column 9.
[0038] 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.
[0039] Through the synergistic effect of the above-mentioned components, the present invention effectively realizes the widening of the highway without large-scale destruction of the mountain and excessive increase of land, and significantly improves the traffic capacity and safety of the highway.
[0040] The construction method of this application includes:
[0041] First, the chiseled portion 3 within a certain height range on the upper part of the existing retaining wall 1 is chiseled away to ensure that the chiseled surface is flat and meets the design requirements.
[0042] Next, drilling and reinforcing bar planting 2 is 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.
[0043] Place the guardrail embedded anchor bolts 6 and the lower flange accurately at the predetermined position.
[0044] Afterwards, the concrete of the cantilevered part 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 .
[0045] After the cantilever reinforced concrete 11 reaches a certain strength, the guardrail column 9 and the reinforcing rib 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.
[0046] 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.
[0047] 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.
[0048] 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.
[0049] In addition, the existing retaining wall 1 is arranged on the downhill side of the mountain outside the highway. This arrangement helps to improve the stability and safety of the highway. The existing retaining wall cantilever widening structure of the mountain highway of the present invention effectively realizes the widening of the highway through the synergistic effect of the above-mentioned components without destroying the mountain in large quantities and adding too much land, thereby improving the traffic capacity and safety of the highway. The cantilever width of the cantilever reinforced concrete 11 is less than 2m, which can not only meet the widening requirements, but also ensure the stability of the structure.
[0050] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention 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 invention.
Claims
1. A cantilever widening structure of an existing retaining wall on a mountain highway, characterized in that: It comprises an existing retaining wall (1), embedded reinforcement (2), cantilever reinforced concrete (11), cantilever longitudinal reinforcement (4), cantilever circumferential reinforcement (5) and anchor rods (12); A chiseled portion (3) within a certain height range of the upper part of an existing retaining wall (1) is chiseled out, and cantilever reinforced concrete (11) is poured at the position of the chiseled portion (3). The width of the cantilever reinforced concrete (11) exceeds the width of the chiseled portion (3) to form a cantilever structure. Cantilever longitudinal reinforcement (4) and cantilever circumferential reinforcement (5) are poured in the cantilever reinforced concrete (11). Anchoring bars (2) are used to connect the cantilever reinforced concrete (11) to the existing retaining wall (1) at the position of the chiseled portion (3). Anchor rods (12) anchor the existing retaining wall (1) to a foundation. The cantilever width of the cantilever reinforced concrete (11) is less than 2 m.
2. The cantilever 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), wherein the guardrail embedded bolts (6) are embedded in the cantilever reinforced concrete (11).
3. The cantilever widening structure of an existing retaining wall on a mountain highway according to claim 2 is characterized in that: It also includes a flange (7), which is composed of an upper flange and a lower flange. The lower flange is cast together with the cantilever reinforced concrete (11), and the upper flange and the lower flange are fixed by anchor nuts (10) and guardrail embedded bolts (6).
4. The cantilever widening structure of an existing retaining wall on a mountain highway according to claim 3 is characterized in that: It also comprises a guardrail post (9), wherein the guardrail post (9) and the reinforcing rib (8) are welded and fixed to the upper flange.
5. The cantilever widening structure of an existing retaining wall on a mountain highway according to claim 4 is characterized in that: The reinforcing ribs (8) are arranged at the column foot of the guardrail column (9).
6. The cantilever 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 arranged on the outside of the highway, that is, on the downhill side of the mountain of the highway.
7. The cantilever widening structure of an existing retaining wall on a mountain highway according to claim 1 is characterized in that: The height and shape of the cantilevered reinforced concrete (11) should be precisely controlled according to design requirements to ensure that the re-poured reinforced concrete is firmly connected to the existing retaining wall (1).
8. The cantilever widening structure of an existing retaining wall on a mountain highway according to claim 1 is characterized in that: The number, diameter and arrangement of the cantilever longitudinal reinforcement (4) should be designed according to the stress conditions of the cantilevered part to ensure the bearing capacity of the cantilevered reinforced concrete (11).
9. The cantilever widening structure of an existing retaining wall on a mountain highway according to claim 1 is characterized in that: The spacing and diameter of the cantilever annular reinforcement (5) should be designed according to the size and stress conditions of the cantilevered part to ensure the bearing capacity of the cantilevered reinforced concrete (11).
10. A construction method for the cantilever widening structure of an existing retaining wall on a mountain highway according to claim 5, characterized in that: Applicable to the situation where a retaining wall is set outside the existing highway, including the following steps: Step 1: Chisel away a certain height of the upper portion of the existing retaining wall (1); Step 2: drilling holes and planting reinforcement bars (2) on the top of the existing retaining wall (1) after it has been chiseled off; Step 3: tying cantilever longitudinal reinforcement (4) and cantilever circumferential reinforcement (5); Step 4: Place the pre-buried guardrail anchor bolts (6) and lower flange; Step 5: integrally pouring concrete of the cantilevered portion to form cantilevered reinforced concrete (11); Step 6: Weld the guardrail column (9), the reinforcing rib (8) and the upper flange, and then fix the upper and lower flanges with the pre-buried anchor bolts through the anchor nuts (10); Step 7: construct anchor rods (12) on the existing retaining wall (1). This step can also be performed before step 1.