Construction method for bridge abutment in canyon cliff zone

Abstract

The invention discloses a canyon cliff zone bridge abutment construction method which comprises the following steps: building a bridge abutment construction platform: firstly installing a group of triangular stabilizing brackets on a cliff rock surface of a construction platform area; the steps are repeated, multiple sets of triangular stable supports are evenly distributed and installed in the length direction of the cliff rock surface, distribution beams are fixed between horizontal cross beams in the multiple sets of triangular stable supports, and scaffold boards are laid on the tops of the distribution beams to form a bridge abutment construction platform; bridge abutment diagonal bracing support and formwork construction is conducted on the built bridge abutment construction platform; and bridge abutment cantilever beam support and formwork construction is conducted on the built bridge abutment construction platform. According to the construction method, the special bridge abutment construction platform is firstly built, then bridge abutment diagonal bracing support and formwork construction and bridge abutment cantilever beam support and formwork construction are conducted on the bridge abutment construction platform, the bridge abutment construction platform is supported by the multiple sets of triangular stable supports, and compared with scaffold steel pipes built temporarily, the construction efficiency is greatly improved; and good safety and stability are achieved, and safety is ensured.

Description

Technical Field

[0001] The invention relates to the technical field of bridge abutment construction in canyon cliff areas, in particular to a bridge abutment construction method in canyon cliff areas. Background Art

[0002] Tourist attractions usually build glass plank roads, viewing platforms, or viewing bridges in the cliff areas of the canyon, which requires construction work to be carried out on the cliffs.

[0003] During the construction of bridge abutments in canyon cliff areas, it is necessary to ensure both the efficiency of the construction and the stability of the construction platform and formwork supports. The safety of the construction workers also needs to be considered during high-altitude operations.

[0004] At present, there is a lack of a systematic, safe and efficient complete construction method in the construction of bridge abutments in canyon cliff areas. Most of them use scaffolding steel pipes as temporary construction platforms through welding to carry out bridge abutment construction. The construction platforms have the problem of unstable support and fixation, and there are certain safety hazards in high-altitude operations. Summary of the invention

[0005] The purpose of the present invention is to provide a method for constructing a bridge abutment in a canyon cliff area, so as to solve the problem of unstable temporary construction work platform existing in the traditional construction of bridge abutments in canyon cliff areas.

[0006] The technical solution of the present invention is: a method for constructing a bridge abutment in a canyon cliff zone, comprising the following steps:

[0007] Build abutment construction platform:

[0008] A set of triangular stabilizing brackets are first installed on the cliff rock surface in the construction platform area, and horizontal and inclined reinforcements are respectively planted on the cliff rock surface, and the horizontal beam is fixed to the steel bars after horizontal reinforcement, and the diagonal brace is fixed to the steel bars after inclined reinforcement, and the top of the diagonal brace is fixed to the bottom of the horizontal beam, and a stabilizing rod is fixed between the horizontal beam and the diagonal brace to form a set of triangular stabilizing brackets;

[0009] Repeat the above steps, evenly install multiple sets of triangular stabilizing brackets along the length direction of the cliff rock face, vertically fix the connecting rods between the diagonal braces in the multiple sets of triangular stabilizing brackets, fix the distribution beams between the horizontal beams in the multiple sets of triangular stabilizing brackets, and lay scaffolding boards on the top of the distribution beams to form a bridge abutment construction platform;

[0010] Carry out the construction of abutment diagonal bracing brackets and formwork on the built abutment construction platform;

[0011] The abutment cantilever beam support and formwork are constructed on the constructed abutment construction platform.

[0012] Preferably, an angle α is formed between the horizontal beam and the diagonal brace, and the angle α ranges from 30° to 60°, and the stabilizing rod and the diagonal brace are vertically arranged.

[0013] Preferably, there are multiple diagonal braces, and they are evenly distributed along the width direction of the horizontal beam. The number of the inclined embedded bars is the same as the number of the diagonal braces, and they are fixedly connected in a one-to-one correspondence. The multiple diagonal braces are fixed by stabilizing rods.

[0014] Preferably, the diameter of the reinforcement holes drilled on the cliff rock surface is 30 mm, and the mortar poured into the holes is M30 mortar.

[0015] Preferably, a guardrail is fixed to the edge of the scaffolding board.

[0016] Preferably, the steps of constructing the abutment diagonal brace bracket and formwork on the constructed abutment construction platform include:

[0017] The first square wood and the first steel pipe back rib are arranged outside the abutment diagonal support formwork panel, and the side formwork is reinforced by the first tie rod;

[0018] A plurality of first distribution steel sections are arranged on the lower side of the bottom form of the inclined abutment diagonal brace formwork panel, the plurality of first distribution steel sections are arranged along the length direction of the cliff rock surface, a first supporting steel section is arranged between the bottoms of the plurality of first distribution steel sections, a first diagonal anchor rod is arranged on both sides of the first supporting steel section, one end of the first diagonal anchor rod is fixed to the first supporting steel section, the other end of the first diagonal anchor rod is fixed to the cliff rock surface, and concrete is poured in the abutment diagonal brace formwork panel to form an abutment diagonal brace bracket.

[0019] The steps of constructing the abutment cantilever beam support and formwork on the constructed abutment construction platform include:

[0020] A second square timber and a second steel pipe back rib are installed outside the cantilever beam and bridge deck formwork, and a second tie rod is used to reinforce the side formwork;

[0021] A plurality of second distribution steel sections are arranged on the lower side of the bottom formwork of the horizontally arranged cantilever beam and the bridge deck formwork, and the plurality of second distribution steel sections are arranged along the length direction of the cliff rock surface. The plurality of second distribution steel sections are fixed on the abutment diagonal bracing bracket, a second supporting steel section is arranged between the bottoms of the plurality of second distribution steel sections, a second diagonal anchor rod is arranged on the second supporting steel section, one end of the second diagonal anchor rod is fixed to the second supporting steel section, and the second diagonal anchor rod is fixed to the cliff rock surface, and concrete is poured in the cantilever beam and the bridge deck formwork to form the abutment cantilever beam.

[0022] Preferably, there are a plurality of first supporting steel sections, which are evenly distributed along the inclination direction of the first distribution steel section, and there are a plurality of second supporting steel sections, which are evenly distributed along the width direction of the second distribution steel section.

[0023] Preferably, the horizontal beam, the first supporting steel section and the second supporting steel section are all I-beams.

[0024] Compared with the prior art, the present invention has the following beneficial effects:

[0025] When the present invention is carrying out abutment construction, first a special abutment construction platform is built, and then the abutment diagonal bracing support and formwork construction as well as the abutment cantilever beam support and formwork construction are carried out on the abutment construction platform respectively, thereby improving the construction efficiency. At the same time, the abutment construction platform adopts multiple groups of triangular stable supports for stable support, and compared with the temporarily constructed scaffolding steel pipes, it has good safety and stability performance, thereby ensuring safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 A flow chart of a method for constructing a bridge abutment in a canyon cliff zone according to an embodiment of the present invention;

[0027] Figure 2 It is a schematic diagram of the main structure of the abutment construction platform of the present invention;

[0028] Figure 3 It is a side view structural schematic diagram of the abutment construction platform of the present invention;

[0029] Figure 4 This is a schematic diagram of the main structure of the abutment diagonal brace bracket and the template in the present invention;

[0030] Figure 5 It is a side view structural schematic diagram of the abutment diagonal brace bracket and the template in the present invention;

[0031] Figure 6 It is a schematic diagram of the main structure of the abutment cantilever beam support and the template in the present invention;

[0032] Figure 7 It is a side structural schematic diagram of the abutment cantilever beam support and formwork in the present invention. DETAILED DESCRIPTION

[0033] The following is combined with Figures 1 to 7 , a specific embodiment of the present invention is described in detail. In the description of the invention, it should be understood that the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the invention, unless otherwise specified, "multiple" means two or more.

[0034] Example

[0035] like Figures 1 to 7As shown, an embodiment of the present invention provides a method for constructing a bridge abutment in a canyon cliff area, comprising the following steps:

[0036] A method for constructing a bridge abutment in a canyon cliff zone comprises the following steps:

[0037] Building a bridge abutment construction platform: construction workers are lowered to the construction platform area by safety ropes, and multiple sets of triangular stabilizing brackets are installed on the cliff rock surface 1 in the construction platform area. Specifically, the process of installing a set of triangular stabilizing brackets is that construction workers drill holes on the cliff rock surface 1 by hand to carry out horizontal and inclined reinforcement planting, weld and fix the horizontal beam 4 to the steel bar 2 after horizontal reinforcement planting, weld and fix the diagonal brace 5 to the steel bar 3 after inclined reinforcement planting, weld and fix the top of the diagonal brace 5 to the bottom of the horizontal beam 4, and weld and fix a stabilizing rod 6 between the horizontal beam 4 and the diagonal brace 5 to form a triangular stabilizing bracket;

[0038] According to the above method, multiple sets of triangular stabilizing brackets are sequentially arranged along the length direction of the cliff rock face 1, the connecting rod 8 is vertically fixed to the diagonal braces 5 in the multiple sets of triangular stabilizing brackets to form a whole, the distribution beam 7 is welded and fixed between the multiple sets of triangular stabilizing brackets, and the scaffolding board is laid on the top of the distribution beam 7 to form the abutment construction platform;

[0039] Carry out the construction of the abutment diagonal support bracket and formwork on the built abutment construction platform:

[0040] A first square timber 11 and a first steel pipe back rib 12 are arranged outside the bridge abutment diagonal support formwork panel 10, and a first tie rod 17 is used for tension reinforcement of the side formwork;

[0041] A plurality of first distribution steel sections 13 are arranged on the lower side of the bottom form of the inclined abutment diagonal brace formwork panel 10, and the plurality of first distribution steel sections 13 are arranged along the length direction of the cliff rock surface 1. A first support steel section 14 is arranged between the bottoms of the plurality of first distribution steel sections 13, and a first diagonal anchor rod 16 is arranged on both sides of the first support steel section 14. One end of the first diagonal anchor rod 16 is welded and fixed to the first support steel section 14, and the other end of the first diagonal anchor rod 16 is fixed to the steel bar 15 after horizontal embedding on the cliff rock surface 1, and concrete is poured in the abutment diagonal brace formwork panel 10 to form an abutment diagonal brace bracket.

[0042] Carry out the construction of the abutment cantilever beam support and formwork on the built abutment construction platform:

[0043] A second square wood 19 and a second steel pipe back rib 20 are arranged outside the cantilever beam and bridge deck formwork 18, and a second tie rod 26 is used for tension reinforcement of the side formwork;

[0044] A plurality of second distribution steel sections 21 are arranged on the lower side of the bottom formwork of the horizontally arranged cantilever beam and bridge deck formwork 18, and the plurality of second distribution steel sections 21 are arranged along the length direction of the cliff rock surface 1, and the plurality of second distribution steel sections 21 are fixed on the abutment diagonal brace bracket, and a second supporting steel section 22 is arranged between the bottoms of the plurality of second distribution steel sections 21, and a second diagonal anchor rod 24 is arranged on the second supporting steel section 22, and one end of the second diagonal anchor rod 24 is welded and fixed to the second supporting steel section 22, and the steel bar 23 of the second diagonal anchor rod 24 is fixed to the cliff rock surface 1 after being horizontally embedded, and concrete is poured in the cantilever beam and bridge deck formwork 18 to form the abutment cantilever beam.

[0045] Among them, the bridge abutment diagonal support formwork panel 10 and the cantilever beam and bridge deck formwork 18 are all made of bamboo plywood.

[0046] Furthermore, in order to improve the supporting strength, an angle α is formed between the horizontal beam 4 and the diagonal brace 5, and the range of the angle α is 30°-60°. The stabilizing rod 6 and the diagonal brace 5 are vertically arranged. When the angle α is less than 30°, the diagonal brace 5 cannot provide sufficient supporting force to the horizontal beam 4 during support due to the small angle, resulting in unstable support. When the angle α is greater than 60°, the angle is too large, making it difficult to install the diagonal brace 5.

[0047] Furthermore, in order to improve the supporting fixing strength, there are multiple diagonal braces 5, and they are evenly distributed along the width direction of the horizontal beam 4. The number of inclined embedded bars is the same as the number of diagonal braces 5, and they are fixedly connected one by one. The multiple diagonal braces 5 are fixed by stabilizing rods 8.

[0048] Furthermore, in order to improve the support and fixing strength, as Figure 4 As shown, a plurality of first supporting steel sections 14 are provided and evenly distributed along the inclination direction of the first distribution steel section 13, as shown in FIG. Figure 6 As shown, there are a plurality of second supporting steel sections 22 , which are evenly distributed along the width direction of the second distribution steel section 21 .

[0049] Among them, the diameter of the reinforcement drilling hole 1 on the cliff rock surface is 30mm, and the mortar poured into the hole is M30 mortar.

[0050] The first supporting steel 14 and the second supporting steel 22 are both I-beams.

[0051] Furthermore, in the actual construction process, the width of the abutment construction platform is 2.5m, and the abutment construction platforms are arranged along the abutment working surface at intervals of 1m. 3.5cm scaffolding boards are installed on the construction platform and fully covered. A 1.2m high guardrail 9 is fixed at the edge of the construction platform, and handrail cross bars are set at 0.5m and 1.0m of the guardrail.

[0052] The above disclosures are only several preferred specific embodiments of the present invention. However, the embodiments of the present invention are not limited thereto. Any changes that can be conceived by those skilled in the art should fall within the protection scope of the present invention.

Claims

1. A method for constructing a bridge abutment in a canyon cliff area, characterized in that: The following steps are involved: Build abutment construction platform: A set of triangular stabilizing brackets are first installed on the cliff rock surface (1) in the construction platform area, and horizontally and obliquely embedded reinforcements are respectively performed on the cliff rock surface (1), and the horizontal beam (4) is fixed to the horizontally embedded reinforcements, and the diagonal brace (5) is fixed to the obliquely embedded reinforcements, and the top of the diagonal brace (5) is fixed to the bottom of the horizontal beam (4), and a stabilizing rod (6) is fixed between the horizontal beam (4) and the diagonal brace (5) to form a set of triangular stabilizing brackets; Repeat the above steps, evenly install multiple sets of triangular stabilizing brackets along the length direction of the cliff rock surface (1), vertically fix the connecting rod (8) between the diagonal braces (5) in the multiple sets of triangular stabilizing brackets, fix the distribution beam (7) between the horizontal beams (4) in the multiple sets of triangular stabilizing brackets, and lay scaffolding boards on the top of the distribution beam (7) to form a bridge abutment construction platform; Carry out the construction of abutment diagonal bracing brackets and formwork on the built abutment construction platform; The abutment cantilever beam support and formwork are constructed on the constructed abutment construction platform.

2. The method for constructing a bridge abutment in a canyon cliff area according to claim 1, characterized in that: An angle α is formed between the horizontal crossbeam (4) and the diagonal brace (5), and the range of the angle α is 30°-60°. The stabilizing rod (6) and the diagonal brace (5) are vertically arranged.

3. The canyon cliff area bridge abutment construction method according to claim 2, characterized in that: There are a plurality of diagonal braces (5), which are evenly distributed along the width direction of the horizontal beam (4); the number of the inclined embedded bars is the same as the number of the diagonal braces (5), and they are fixedly connected in a one-to-one correspondence; the plurality of diagonal braces (5) are fixed by stabilizing rods (8).

4. The method for constructing a bridge abutment in a canyon cliff area according to claim 1, characterized in that: The diameter of the reinforcement holes drilled on the cliff rock surface (1) is 30 mm, and the mortar poured into the holes is M30 mortar.

5. The canyon cliff zone bridge abutment construction method according to claim 1, characterized in that: A protective railing (9) is fixed at the edge of the scaffolding board.

6. The method for constructing a bridge abutment in a canyon cliff zone according to any one of claims 1 to 5, characterized in that: The steps for constructing the abutment diagonal support bracket and formwork on the built abutment construction platform include: A first square wood (11) and a first steel pipe back rib (12) are arranged outside the bridge abutment diagonal support formwork panel (10), and the side formwork is reinforced by a first tie rod (17); A plurality of first distribution steel sections (13) are arranged on the lower side of the bottom form of an inclined bridge abutment diagonal brace formwork panel (10), the plurality of first distribution steel sections (13) are arranged along the length direction of a cliff rock surface (1), a first support steel section (14) is arranged between the bottoms of the plurality of first distribution steel sections (13), a first inclined anchor rod (16) is arranged on both sides of the first support steel section (14), one end of the first inclined anchor rod (16) is fixed to the first support steel section (14), the other end of the first inclined anchor rod (16) is fixed to the cliff rock surface (1), and concrete is poured in the bridge abutment diagonal brace formwork panel (10) to form an abutment diagonal brace bracket.

7. The method for constructing a bridge abutment in a canyon cliff area according to claim 6, characterized in that: The steps of constructing the abutment cantilever beam support and formwork on the constructed abutment construction platform include: A second square wood (19) and a second steel tube back rib (20) are arranged outside the cantilever beam and bridge deck formwork (18), and a second tie rod (26) is used to reinforce the side formwork; A plurality of second distribution steel sections (21) are arranged on the lower side of the bottom formwork of a horizontally arranged cantilever beam and a bridge deck formwork (18), the plurality of second distribution steel sections (21) are arranged along the length direction of the cliff rock surface (1), the plurality of second distribution steel sections (21) are fixed on the bridge abutment diagonal support bracket, a second support steel section (22) is arranged between the bottoms of the plurality of second distribution steel sections (21), a second inclined anchor rod (24) is arranged on the second support steel section (22), one end of the second inclined anchor rod (24) is fixed to the second support steel section (22), the second inclined anchor rod (24) is fixed to the cliff rock surface (1), and concrete is poured in the cantilever beam and the bridge deck formwork (18) to form a bridge abutment cantilever beam.

8. The method for constructing a bridge abutment in a canyon cliff area according to claim 7, characterized in that: There are a plurality of first supporting steel sections (14) which are evenly distributed along the inclination direction of the first distribution steel section (13); there are a plurality of second supporting steel sections (22) which are evenly distributed along the width direction of the second distribution steel section (21).

9. The method for constructing a bridge abutment in a canyon cliff area according to claim 8, characterized in that: The horizontal crossbeam (4), the first supporting steel section (14) and the second supporting steel section (22) are all I-beams.

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