CN211872688U - A rockfall-proof structure for steep-slope bridge piers - Google Patents

Abstract

The utility model provides a falling rocks structure is prevented to abrupt slope pier to solve the dangerous rock falling rocks protection problem of abrupt slope pier, avoid the dangerous rock falling rocks of all unfavorable directions to cause the influence to the pier, and the construction is quick. The rockfall prevention structure includes: the resistance piles are arranged on the steep slope foundation around the bridge pier at intervals, and the pile top elevation is matched with the rockfall height and the bridge pier height; the outer end of the anchor cable structure is arranged at the top and the bottom of the resistance pile close to the mountain side, and the inner end of the anchor cable structure is anchored on the slope foundation; the passive protective net is fixed on the periphery of the resistance pile and forms a wrapping protective ring for the bridge pier; and the elastic buffer body is arranged on the inner side of the resistance pile close to the mountain side.

Description

A rockfall-proof structure for steep-slope bridge piers

technical field

The utility model relates to a rockfall protection project for dangerous rocks, in particular to a rockfall prevention structure for a pier on a steep slope.

Background technique

Dangerous rocks and rockfalls are widely distributed in mountainous areas. Bridges are built on steep slopes near mountains. Since the piers of bridges cannot resist large horizontal forces, effective protective measures must be taken when the bridge passes through the dangerous rockfall area of steep slopes. In order to prevent the dangerous rockfall from adversely impacting the bridge pier, so as to avoid damage to the bridge pier. Traditional rockfall protection retaining walls, passive protection nets and other measures usually have problems such as limited protection height, difficult to remove accumulated rockfall, and high cost of pulling through and setting up. The anti-falling rock structure of the steep-slope bridge pier is of great significance, and should have the characteristics of good protection effect, economical, environmental protection, favorable for construction and popularization and application.

Utility model content

The technical problem to be solved by the utility model is to provide a rockfall prevention structure for a steep-slope bridge pier, so as to solve the problem of rockfall protection of a steep-slope bridge pier, avoid the impact of dangerous rockfalls in all unfavorable directions on the bridge pier, and the construction is fast.

The technical scheme adopted by the utility model to solve the above-mentioned technical problems is as follows:

The utility model relates to a rockfall prevention structure for a pier on a steep slope, which is characterized by comprising: resistance piles, which are arranged at intervals on the steep slope foundation around the pier, and the pile top elevation matches the height of the rockfall and the height of the pier; The top and bottom of the resistance piles on the mountain side are anchored on the slope foundation; the passive protection net is fixed on the periphery of the resistance piles to form a wrapping protection circle for the bridge pier; the elastic buffer body is set on the inner side of the resistance piles on the mountain side.

The beneficial effect of the utility model is that the resistance pile structure is used to resist the impact force of rockfall from dangerous rock, which has large resistance and adjustable height; Punching damage occurs to the structure; the anchor cable structure is set on the upper part of the resistance pile, which can significantly improve the stress state of the resistance pile, reduce the set section size of the resistance pile, save the project investment, and at the same time greatly enhance the resistance of the resistance pile; The anchor cable structure is arranged at the lower part of the resistance pile, which can greatly increase the stability of the resistance pile, thereby reducing the setting depth of the resistance pile, which is more conducive to construction and saves investment; the periphery of the resistance pile adopts a passive protection net to form a wrapping protection circle, which can avoid all Dangerous rocks and rockfalls in unfavorable directions will affect the piers; the resistance piles are arranged in a convex plane on the side of the mountain, so that the accumulated dangerous rocks and rockfalls can roll out of the influence range of the bridge piers along the steep slope terrain. The proposed construction method has the characteristics of simple operation, easy quality control, and rapid construction, and can be popularized and applied on a large scale.

Description of drawings

This manual includes the following two drawings:

Fig. 1 is the cross-sectional schematic diagram of a kind of steep slope bridge pier anti-falling rock structure of the present invention;

2 is a schematic plan view of a rockfall prevention structure for a steep-slope bridge pier according to the present invention.

The figure shows the names of the components and the corresponding marks: resistance pile 1, anchor cable structure 2, elastic buffer body 3, passive protection net 4, pile foundation A, bearing platform B, bridge pier C, beam body D.

Detailed ways

Below in conjunction with accompanying drawing and embodiment, the utility model is further described:

1 and 2, a rockfall prevention structure for a steep-slope bridge pier of the present invention is characterized by including: resistance piles 1, which are arranged at intervals on the steep-slope foundation around the bridge pier C, and the pile top elevation is the same as the rockfall height and the bridge pier C height. Matching; anchor cable structure 2, the outer ends are set on the top and bottom of the resistance pile 1 on the mountain side, and the inner end is anchored on the slope foundation; passive protection net 4, fixed on the periphery of the resistance pile 1, forming a wrapping protection circle for the bridge pier C; The elastic buffer body 3 is arranged on the inner side of the resistance pile 1 on the side of the mountain.

The utility model adopts the resistance pile 1 for resisting the impact force of rockfall of dangerous rock, the resistance is large, and the setting height is adjustable. By arranging the elastic buffer body 3 on the resistance pile 1, the impact force of the rockfall of the dangerous rock can be relieved, and the punching damage of the structure can be avoided. The anchor cable structure 2 is arranged on the upper part of the resistance pile 1, which can significantly improve the stress state of the resistance pile 1, reduce the cross-sectional size of the resistance pile 1, save the engineering investment, and at the same time greatly enhance the resistance of the resistance pile 1; The anchor cable structure 2 is arranged at the lower part of the pile, which can greatly increase the stability of the resistance pile 1, thereby reducing the setting depth of the resistance pile 1, which is more conducive to construction and saves investment. A passive protection net 4 is used on the periphery of the resistance pile 1 to form a wrapping protection circle, which can avoid the impact of dangerous rockfalls in all unfavorable directions on the bridge pier. The resistance pile 1 is arranged in a convex plane on the side of the mountain, so that the accumulated dangerous rock and rockfall can roll out of the influence range of the bridge pier along the steep slope terrain.

Referring to FIG. 2 , the resistance pile 1 on the mountain side adopts a large section size, and the resistance pile 1 on the downslope side adopts a small section size, so as to save engineering investment. The resistance pile 1 on the side of the mountain is arranged on a plane to form a convex cloth surface, and its convex angle is not less than 60 degrees. Referring to FIG. 1 , the anchor cable structure 2 at the top of the resistance pile 1 is fixed by light tension, and the anchor cable structure 2 at the lower part of the resistance pile 1 is fixed by super tension. The elastic buffer body 3 is generally made of scrap tires.

Referring to Figure 1 and Figure 2, a rockfall prevention structure for a steep-slope bridge pier of the present invention is constructed in the following steps:

①Structural construction of pile foundation A, cap B, pier C and beam body D of the bridge structure;

②The plane positioning of the resistance pile 1, excavation of the resistance pile 1 pile well, construction of the reinforced concrete of the resistance pile 1, setting up the anchor cable structure 2 on the resistance pile 1 on the side of the mountain Embedded connecting steel bars to the bottom;

③ When the strength of the resistance pile 1 reaches more than 80% of the design strength, the elastic buffer body 3 is fixedly installed on the pre-embedded connecting steel bars on the side of the resistance pile 1 on the side of the mountain;

④Stretch and wrap and fix the passive protective net 4 on the periphery of the resistance pile 1;

⑤Construct the grouting fixed anchoring section of the anchor cable structure 2 on the slope foundation corresponding to the resistance pile 1 on the mountain side;

⑥ The outer end of the anchor cable structure 2 passes through the pre-embedded anchor cable hole on the resistance pile 1, and the anchor cable is tensioned and locked on the outer side of the resistance pile 1.

The above construction method has the characteristics of simple operation, easy quality control, fast construction, etc., and can be popularized and applied on a large scale.

The above is only to illustrate some principles of the rockfall prevention structure of the steep slope bridge pier of the present invention. The corresponding modifications and equivalents used belong to the scope of the patent applied for by the present utility model.

Claims (4)

1. an anti-falling rock structure for a steep-slope bridge pier is characterized in that it comprises: a resistance pile (1), which is arranged at intervals on the steep-slope foundation around the bridge pier (C), and the pile top elevation matches the rockfall height and the bridge pier (C) height; The cable structure (2), the outer ends are arranged at the top and bottom of the resistance pile (1) on the side of the mountain, and the inner end is anchored on the slope foundation; the passive protection net (4) is fixed on the periphery of the resistance pile (1), and is opposite to the bridge pier ( C) forming a wrapping protection ring; the elastic buffer body (3) is arranged on the inner side of the resistance pile (1) on the side of the mountain. 2 . The rockfall prevention structure for a steep-slope bridge pier according to claim 1 , characterized in that: the resistance piles (1) on the mountain side adopt large cross-sectional dimensions, and the resistance piles (1) on the downslope side adopt small cross-sectional dimensions. 3 . 3. A rockfall prevention structure for a steep-slope bridge pier as claimed in claim 1, characterized in that: the resistance piles (1) on the mountain side are arranged on a plane to form a convex cloth surface, and the convex angle thereof is not less than 60 degrees. 4. The rockfall prevention structure of a steep-slope bridge pier according to claim 2, wherein the anchor cable structure (2) at the top of the resistance pile (1) is fixed by light tension, and the anchor cable at the bottom of the resistance pile (1) is fixed by light tension. The cable structure (2) is fixed by hypertension.

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