Construction method for buckle cable ridge under steep cliff wall condition

Abstract

The invention relates to the field of buckle cable ridges, in particular to a buckle cable ridge construction method used under the steep cliff wall condition. Pile foundation locking opening construction of the buckle rope ground ridge is carried out; constructing a pile foundation and a bearing platform bracket foundation under the ground of the buckle cable ridge; constructing a pile foundation and a bearing platform bracket above the ground of the buckle cable ridge; and carrying out bearing platform construction on the buckle cable ridge. According to the construction method, when no large hoisting equipment exists, a construction platform, namely a pile foundation locking opening, can be directly poured on the steep cliff slope surface only by adopting a mode that small temporary facilities are matched with manual work, after pile foundation excavation is completed, a bearing platform support foundation and the pile foundation are synchronously poured into a whole, then a bearing platform support is installed to construct a bearing platform, and construction of the buckle cable ridge is completed; the bearing platform construction load is transmitted to the bearing platform support foundation through the bearing platform support and directly transmitted to the pile foundation, the problems that excavation of a mountain is conducted, and additional treatment is needed due to insufficient foundation bearing capacity are solved, and meanwhile environmental damage is reduced; the method is simple in step, convenient to operate and good in effect.

Description

Technical Field

[0001] The invention relates to the field of cable-stayed ridges, and in particular to a cable-stayed ridge construction method for use on steep cliffs. Background Art

[0002] Steel truss arch bridges usually use the cantilever assembly method to install the arch ribs. During the cantilever assembly process of the arch ribs, cables are used for anchoring. The cables are converted and anchored to the cable ridge through the cable tower, or the cables are directly anchored to the cable ridge. For steep cliff conditions, there is no construction site with cable towers, and the mountains on both sides are extremely steep. The cables can be directly anchored to the mountain, that is, the cable ridge. However, due to the lack of construction sites, vehicles cannot reach the cable ridge construction site. The cable ridge can only be manually transported for material and concrete construction. The current cable ridge construction method can be to form a construction platform by grooving the slope surface, and use ground-type full-span brackets or cantilever brackets for the cable ridge foundation construction. This method has the following problems: (1) Under steep cliff conditions, if it is necessary to cut grooves to form a cable ridge construction site, the amount of grooves to be cut is extremely large, which increases construction costs and damages the environment; (2) The foundation bearing capacity of the floor-standing full-floor support must reach the design bearing capacity. If the construction site after slotting cannot meet the requirements, the foundation needs to be treated, which increases the construction cost; (3) The use of cantilever supports requires the assistance of lifting equipment. Under steep cliff conditions, the arrangement of lifting equipment is difficult or impossible. Summary of the Invention

[0003] The purpose of the present invention is to provide a cable-stayed ridge construction method for use on steep cliffs in order to address the problems existing in the prior art.

[0004] In order to achieve the above object, the technical solution adopted by the present invention is: In a first aspect, the present invention provides a method for constructing a cable-stayed ridge on a steep cliff, comprising the following steps: S1. Installation of temporary facilities for the construction of the cable ridge: artificially constructing a pedestrian walkway to the construction location of the cable ridge, installing pump pipes along the walkway, and constructing a small cableway; S2, construction of the pile foundation interlocking mouth of the cable ridge; transporting the pile foundation interlocking mouth materials by the small cableway, directly tying the reinforcement bars and installing the formwork of the pile foundation interlocking mouth at the slope line position of the cable ridge, and pouring the pile foundation interlocking mouth concrete by the pump pipe; S3, construction of the pile foundation and the cap support foundation below the ground of the cable-stayed ridge; after the pile foundation lock is constructed, the pile foundation excavation derrick is installed and the excavation is completed, the pile foundation and the cap support foundation materials below the ground are transported by the small cableway, the reinforcement of the pile foundation and the cap support foundation below the ground is tied and the formwork is installed, the cap support foundation is connected to the top of the pile foundation lock, and concrete is poured through the pump pipe to cast the cap support foundation and the pile foundation below the ground into an integral structure; S4, constructing the above-ground pile foundation and the cap support of the cable-stayed ridge; transporting the above-ground pile foundation and the cap support materials by the small cableway, manually installing the cap support after the materials are in place, completing the steel bar binding and formwork installation of the above-ground pile foundation, and pouring the above-ground pile foundation concrete by the pump pipe; S5, construction of the foundation of the cable-stayed ridge; transporting the foundation materials through the small cableway, completing the reinforcement binding and formwork installation of the foundation, pouring the foundation concrete through the pump pipe, and completing the construction of anchor cables and cable stays on the foundation using a working scaffold.

[0005] By adopting the cable-stayed ridge construction method for steep cliff conditions described in the present invention, when there is no large-scale lifting equipment, only small temporary facilities can be used in combination with manual labor to directly cast the construction platform, i.e., the pile foundation lock, on the steep cliff slope. After the pile foundation excavation is completed, the pedestal support foundation and the pile foundation are simultaneously cast into one, and then the pedestal support is installed to construct the pedestal, completing the construction of the cable-stayed ridge; the pedestal construction load is transmitted to the pedestal support foundation and directly to the pile foundation through the pedestal support, avoiding the excavation of the mountain and the problem of insufficient foundation bearing capacity requiring additional treatment, while reducing environmental damage; the method has simple steps, is easy to operate, and has good effects.

[0006] As a preferred technical solution of the present invention, the plank road is a steel pipe plank road.

[0007] As a preferred technical solution of the present invention, the pump tube is a high-pressure pump tube.

[0008] As a preferred technical solution of the present invention, the length and width of the pile foundation lock are greater than the length and width of the foundation cap.

[0009] As a preferred technical solution of the present invention, the platform support adopts a full-chair support.

[0010] As a preferred technical solution of the present invention, in step S3, the concrete load of the cap support foundation construction is carried on the pile foundation lock in the early stage, and the cap support foundation load is directly transferred to the pile foundation below the ground in the later stage.

[0011] As a preferred technical solution of the present invention, in step S4, the bearing platform support also serves as the scaffolding for the pile foundation construction above the ground.

[0012] As a preferred technical solution of the present invention, in step S5, when the pedestal is cast, the concrete load is directly borne by the pedestal support, the pedestal support load is transferred to the pedestal support foundation, the pedestal support foundation load is transferred to the pile foundation below the ground, and the pile foundation load below the ground is transferred to the mountain.

[0013] As a preferred technical solution of the present invention, the method for constructing a cable ridge under steep cliff conditions also includes step S6, in which the temporary facilities are dismantled; after the construction of the cable ridge is completed, the small cableway, the pump pipe, and the support bracket are manually dismantled, and the plank road and the working scaffolding are retained.

[0014] In a second aspect, the present invention further provides a cable-stayed ridge, which is constructed and formed using the cable-stayed ridge construction method for steep cliff conditions as described in any of the above items.

[0015] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: The present invention describes a method for constructing a cable-stayed ridge under steep cliff conditions. When there is no large-scale lifting equipment, only small temporary facilities can be used in combination with manual labor to directly cast a construction platform, namely the pile foundation lock, on the slope of the steep cliff. After the pile foundation excavation is completed, the pedestal support foundation and the pile foundation are simultaneously cast into one, and then the pedestal support is installed to construct the pedestal, completing the construction of the cable-stayed ridge. The pedestal construction load is transmitted to the pedestal support foundation and directly to the pile foundation through the pedestal support, avoiding the excavation of the mountain and the problem of insufficient foundation bearing capacity requiring additional treatment, while reducing environmental damage. The method has simple steps, is easy to operate, and has good effects. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the overall layout of cable ridge construction under steep cliff conditions; Figure 2 This is a flow chart for cable-stayed ridge construction under steep cliff conditions.

[0017] Markings in the figure: 1-pile foundation lock, 2-pile foundation below the ground, 3-cap support foundation, 4-slope line, 5-cap support, 6-pile foundation above the ground, 7-cap, 8-cable, 9-anchor cable. DETAILED DESCRIPTION

[0018] The present invention will be further described in detail below in conjunction with test examples and specific embodiments. However, this should not be understood as limiting the scope of the present invention to the following embodiments, and all technologies implemented based on the present invention fall within the scope of the present invention.

[0019] Unless otherwise specified, in the description of the specific embodiments of the present invention, the terms indicating the orientation or positional relationship, such as "upper", "lower", "left", "right", "center", "inside", and "outside", are based on the expressions of the orientation or positional relationship shown in the accompanying drawings, or are the orientation or positional relationship in which the invented product / device / apparatus is placed when it is conventionally used. These terms of orientation or positional relationship are merely for the purpose of facilitating the description of the scheme of the present invention or simplifying the description of the specific embodiments to facilitate the rapid understanding of the scheme by technicians, and do not indicate or imply that a specific device / component / element must have a specific orientation, or be constructed and operated in a specific positional relationship, and therefore should not be understood as limiting the present invention.

[0020] In addition, if the terms "horizontal", "vertical", "overhanging", "parallel" and the like appear, it does not mean that the corresponding devices / components / elements are required to be absolutely horizontal or vertical or overhanging or parallel, but may be slightly tilted or have deviations. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly tilted. Alternatively, it can be simply understood that the corresponding devices / components / elements are set in directions such as "horizontal", "vertical", "overhanging", and "parallel", and can have an error / deviation of ±10% relative to the corresponding direction setting, more preferably an error / deviation within ±8%, more preferably an error / deviation within ±6%, more preferably an error / deviation within ±5%, and more preferably an error / deviation within ±4%. As long as the corresponding device / component / element is within the error / deviation range, it can still achieve its role in the solution of the present invention.

[0021] In addition, the expressions “first”, “second”, “third”, etc. in the terms are merely used to distinguish the description of the same or similar components, and should not be understood as emphasizing or implying the relative importance of specific components.

[0022] In addition, in the description of the embodiments of the present invention, "several," "plurality," and "a number" represent at least two. It can also be any number such as two, three, four, five, six, seven, eight, nine, or even more than nine.

[0023] Furthermore, in the description of the technical solution of the present invention, unless otherwise expressly specified, defined, or limited, the terms "disposed," "installed," "connected," "connected," "provided with," "laid," and "arranged" should be understood broadly. For example, they may refer to fixed connections, detachable connections, or integral connections. They may be welded, riveted, bolted, threaded, or other commonly used connection methods in the art. Such connections may be mechanical, electrical, or communicative; they may be direct, indirect via an intermediate medium, or internally connected between two components.

[0024] In the related art, a railway mid-span steel truss basket arch bridge adopts a construction method of cable hoisting combined with a hook and hook system to assemble the arch ribs. The bridge is located in a deep U-shaped river valley with cliffs, complex terrain, and narrow site. As a result, the cable ridges are arranged on the steep cliffs. In addition, it is located in a forest reserve, where large lifting equipment cannot be arranged and materials are difficult to transport. For this reason, the technical solution of this application was generated. Figures 1 to 2 To elaborate.

[0025] Example 1 like Figures 1 to 2 As shown, the method for constructing a cable ridge on a steep cliff wall according to the present invention comprises the following steps: Step 1: Installation of temporary facilities for cable ridge construction.

[0026] First, a pedestrian steel pipe plank road is manually built to the construction location of the cable ridge, and the pump pipe is installed simultaneously along the plank road. Then, the small cableway for material transportation is completed along the plank road by manually carrying the small cableway materials; the lifting capacity of the small cableway should be 2t, which can directly lift the materials to the 7 cable ridge pedestals; under the steep cliff terrain, the construction site is high above the ground, and the pump pipe uses a high-pressure pump pipe.

[0027] Step 2: Construction of the pile foundation lock 1 of the cable ridge.

[0028] The steel bars, formwork, pull rods and other materials required for the pile foundation lock 1 are transported through the installed small cableway, and the steel bars are tied and the formwork is installed directly on the slope line 4 at the cable ridge. Finally, concrete is pumped through the installed pump pipe to cast the pile foundation lock 1; the length × width of the pile foundation lock 1 is greater than the length × width of the base 7.

[0029] Step 3: Construction of the pile foundation 2 and the cap support foundation 3 below the ground of the cable ridge.

[0030] After the construction of the pile foundation lock 1 is completed, the excavation derrick of the pile foundation 2 below the ground is installed to complete the excavation. The materials of the pile foundation 2 below the ground and the pedestal support foundation 3 are transported to the construction site by the small cableway, and the reinforcement binding and formwork installation of the pile foundation 2 below the ground and the pedestal support foundation 3 are completed. Finally, concrete is pumped through the pump pipe to cast the pedestal support foundation 3 and the pile foundation 2 below the ground into an integral structure. After the concrete reaches the design strength, the pedestal support foundation 3 and the pile foundation 2 below the ground can be subjected to force synchronously; the pedestal support foundation 3 is directly connected to the top of the pile foundation lock 1. In the early stage, the concrete load of the pedestal support foundation 3 is borne on the pile foundation lock 1. In the later stage, the load of the pedestal support foundation 3 is directly transferred to the pile foundation 2 below the ground. The strength of the pedestal support foundation 3 can bear the bending moment generated by the vertical load of the pedestal support 5 above it on the pedestal support foundation 3.

[0031] Step 4: Construction of the pile foundation 6 and the cap support 5 above the ground of the cable ridge.

[0032] The materials of the above-ground pile foundation 6 and the pedestal support 5 are transported to the construction site by the small cableway. After the materials are in place, the pedestal support 5 is installed manually, and the steel bars and formwork of the above-ground pile foundation 6 are installed simultaneously. The pedestal support 5 adopts a full-floor support. When the above-ground pile foundation 6 is constructed, the pedestal support 5 also serves as a construction scaffold for the above-ground pile foundation 6, and concrete is pumped through the pump pipe to cast the above-ground pile foundation 6.

[0033] Step 5: Construction of the foundation 7 of the cable ridge.

[0034] The small cableway is used to directly lift the materials needed for the pedestal 7 to the top of the pedestal 7, and the steel bars and formwork of the pedestal 7 are installed manually. The concrete pouring of the pedestal 7 is then completed using the pump pipe, and finally the construction of the anchor cables 9 and the buckle cables 8 on the pedestal 7 is completed using a working scaffold. When the pedestal 7 is poured, the concrete load of the pedestal 7 is directly borne by the pedestal support 5, and the load of the pedestal support 5 is transferred to the pedestal support foundation 3. The load of the pedestal support foundation 3 is transferred to the pile foundation 2 below the ground. The load of the pile foundation 2 below the ground is finally transferred to the mountain, forming a form in which the concrete construction load of the pedestal 7 is directly borne by the pile foundation.

[0035] Step 6: Dismantling of the temporary facilities.

[0036] After the construction of the cable ridge is completed, the small cableway, the pump pipe, the template, and the base support 5 are manually dismantled, and the steel pipe plank road is retained as a later maintenance channel and the working scaffolding is retained as a later maintenance platform.

[0037] The present embodiment describes a method for constructing a cable-stayed ridge under steep cliff conditions. When there is no large-scale lifting equipment, only small temporary facilities can be used in combination with manual labor to directly cast a construction platform, namely the pile foundation lock 1, on the steep cliff slope. After the pile foundation excavation is completed, the pedestal support foundation 3 and the pile foundation are simultaneously cast into one, and then the pedestal support 5 is installed to construct the pedestal 7 to complete the construction of the cable-stayed ridge. The construction load of the pedestal 7 is transmitted to the pedestal support foundation 3 through the pedestal support 5 and directly transmitted to the pile foundation, avoiding the excavation of the mountain and the problem of insufficient foundation bearing capacity requiring additional treatment, while reducing environmental damage. The method has simple steps, is easy to operate, and has good results.

[0038] Example 2 Not shown in the figure, the cable-stayed ridge described in the present invention is constructed and formed using the cable-stayed ridge construction method for steep cliff conditions as described in Example 1.

[0039] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A cable ridge construction method for steep cliff conditions, characterized in that: The following steps are involved: S1. Installation of temporary facilities for the construction of the cable ridge: artificially constructing a pedestrian walkway to the construction location of the cable ridge, installing pump pipes along the walkway, and constructing a small cableway; S2, construction of the pile foundation lock (1) of the cable ridge; transporting the pile foundation lock (1) material by the small cableway, directly tying the steel bars and installing the formwork of the pile foundation lock (1) at the slope line (4) of the cable ridge, and pouring the concrete of the pile foundation lock (1) by the pump pipe; S3, construction of the pile foundation (2) and the pedestal support foundation (3) below the ground of the cable ridge; after the construction of the pile foundation lock (1) is completed, the pile foundation excavation derrick is installed and the excavation is completed, the materials of the pile foundation (2) and the pedestal support foundation (3) below the ground are transported by the small cableway, the reinforcement binding and template installation of the pile foundation (2) and the pedestal support foundation (3) below the ground are completed, the pedestal support foundation (3) is connected to the top of the pile foundation lock (1), and concrete is poured through the pump pipe to cast the pedestal support foundation (3) and the pile foundation (2) below the ground into an integral structure; S4, construction of the above-ground pile foundation (6) and the cap support (5) of the cable ridge; transporting the above-ground pile foundation (6) and the cap support (5) materials by the small cableway, manually installing the cap support (5) after the materials are in place, completing the steel bar binding and template installation of the above-ground pile foundation (6), and pouring concrete for the above-ground pile foundation (6) by the pump pipe; S5, construction of the pedestal (7) of the cable-stayed ridge; transporting the pedestal (7) material through the small cableway, completing the steel bar binding and formwork installation of the pedestal (7), pouring concrete of the pedestal (7) through the pump pipe, and completing the construction of the anchor cable (9) and the cable (8) on the pedestal (7) using a working scaffold.

2. The cable-stayed ridge construction method for steep cliff conditions according to claim 1 is characterized in that: The plank road is a steel pipe plank road.

3. The cable-stayed ridge construction method for steep cliff conditions according to claim 1 is characterized in that: The pump tube is a high-pressure pump tube.

4. The cable-stayed ridge construction method for steep cliff conditions according to claim 1 is characterized in that: The length and width of the pile foundation lock (1) are greater than the length and width of the bearing platform (7).

5. The cable-stayed ridge construction method for use on steep cliffs according to claim 1, characterized in that: The platform support (5) adopts a full-chamber support.

6. The cable-stayed ridge construction method for use on steep cliffs according to claim 1, characterized in that: In step S3, in the early stage, the load of the concrete of the pedestal support foundation (3) is carried on the pile foundation lock (1), and in the later stage, the load of the pedestal support foundation (3) is directly transferred to the pile foundation (2) below the ground.

7. The cable-stayed ridge construction method for steep cliff conditions according to claim 1 is characterized in that: In step S4, the foundation support (5) also serves as a scaffolding for the construction of the above-ground pile foundation (6).

8. The cable-stayed ridge construction method for steep cliff conditions according to claim 1, characterized in that: In step S5, when the pedestal (7) is cast, the concrete load is directly borne by the pedestal support (5), the load of the pedestal support (5) is transferred to the pedestal support foundation (3), the load of the pedestal support foundation (3) is transferred to the pile foundation (2) below the ground, and the load of the pile foundation (2) below the ground is transferred to the mountain.

9. The cable-stayed ridge construction method for use on steep cliffs according to any one of claims 1 to 8, characterized in that: Also includes: S6, the temporary facilities are dismantled; after the construction of the cable ridge is completed, the small cableway, the pump pipe, and the support platform (5) are manually dismantled, and the plank road and the working scaffold are retained.

10. A cable ridge, characterized in that: The construction and shaping is carried out using the cable-stayed ridge construction method for steep cliff conditions as described in any one of claims 1 to 9.

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