CN-224213382-U - Pier reinforcing device for construction of side-passing railway bridge of shield tunnel

Abstract

The utility model relates to the technical field of tunnel construction, and particularly discloses a pier reinforcing device for side-penetrating railway bridge construction of a shield tunnel, which comprises a pre-excavated tunnel in a geological layer and railway piers above the geological layer, wherein foundation piers of the railway piers are arranged in the geological layer, a first continuous wall, a second continuous wall and a third continuous wall are downwards arranged in the geological layer between the railway piers and the pre-excavated tunnel, a first interlayer between the first continuous wall and the second continuous wall is filled with concrete reinforcing liquid for reinforcement, and a buffer reinforcing member is arranged in a second interlayer between the second continuous wall and the third continuous wall. The bridge pier reinforcing device for the side-through railway bridge construction of the shield tunnel has the beneficial effects that the second interlayer is arranged, and only the buffer reinforcing part exists in the second interlayer, so that the pre-excavated tunnel and the railway bridge pier are completely isolated, and the disturbing force is eliminated in the second interlayer in the process of excavating the tunnel.

Inventors

• HE XINYU
• ZHU DIANJUN
• CHEN DAOLONG
• LI QING
• LIU DEFENG
• WAN MENG
• YE MAOSEN
• WANG CE
• WEI ZICHENG
• ZHANG CHUANYUN
• CHEN MING
• HUANG RAN
• Qiao shifan
• Deng Xibao
• JIANG SHUO
• WANG ZHIFU
• MA SHUAI

Assignees

• 中国铁路广州局集团有限公司
• 中铁十八局集团有限公司
• 中铁十一局集团有限公司
• 中南大学

Dates

Publication Date

20260508

Application Date

20250609

Claims (5)

1. 1. The bridge pier reinforcing device for the side-through railway bridge construction of the shield tunnel comprises a pre-excavated tunnel (400) in a geological layer (100) and a railway bridge pier (200) above the geological layer (100), wherein a foundation pier column (300) of the railway bridge pier (200) is arranged in the geological layer (100), and the bridge pier reinforcing device is characterized in that a first continuous wall (2), a second continuous wall (3) and a third continuous wall (4) are downwards arranged in the geological layer (100) between the railway bridge pier (200) and the pre-excavated tunnel (400), a first interlayer (5) between the first continuous wall (2) and the second continuous wall (3) is filled with concrete reinforcing liquid (9) for reinforcing, and a second interlayer (6) between the second continuous wall (3) and the third continuous wall (4) is internally provided with a buffer reinforcing member (7).
2. 2. The pier reinforcing device for construction of the side-passing railway bridge of the shield tunnel according to claim 1, wherein the upper surface of the geological layer (100) is provided with a process groove (1), and the first continuous wall (2), the second continuous wall (3) and the third continuous wall (4) are all arranged in the process groove (1).
3. 3. The pier reinforcing device for construction of the side-passing railway bridge of the shield tunnel according to claim 1, wherein the buffer reinforcement (7) comprises a plurality of arch-shaped reinforcing rods, two ends of each reinforcing rod are fixed on one side of the third continuous wall (4), and the reinforcing rods are staggered and overlapped and fixed with each other.
4. 4. The pier reinforcing device for construction of the side-passing railway bridge of the shield tunnel according to claim 1, wherein a reinforcement cage is arranged in the first interlayer (5).
5. 5. The pier reinforcing device for the side-through railway bridge construction of the shield tunnel according to claim 4, wherein the anchor rod (8) is inserted downwards in the first interlayer (5), the anchor rod (8) extends upwards to the top of the first interlayer (5), the anchor rod (8) penetrates through the center of the reinforcement cage, and the anchor rod (8) is fixed with the reinforcement cage through the connecting rod.

Description

Pier reinforcing device for construction of side-passing railway bridge of shield tunnel Technical Field The utility model relates to the technical field of tunnel construction, in particular to a pier reinforcing device for side-passing railway bridge construction of a shield tunnel. Background With the continuous development of urban rail transit, the space intersection between the urban tunnel and the foundation of the existing railway bridge is unavoidable, and when the tunnel passes through the existing railway bridge, the disturbance to the upper part and the surrounding stratum is caused by the unavoidable condition when the newly built tunnel passes through or is adjacent to the existing railway bridge for construction, so that the damages such as deformation, displacement, internal stress increase and the like of the foundation and the upper structure of the railway bridge are caused to different degrees. When the influence exceeds the allowable safety control range of the existing railway bridge, new structural damage is caused to the railway bridge or the damage degree of the existing damage is aggravated, and the use safety or the structural safety of the railway bridge is seriously threatened. In addition, once the above problems occur, delay of tunnel crossing construction is necessarily caused, and a series of additional expenses are generated, which cause unnecessary influence and loss. In order to avoid affecting the existing railway bridge in the tunnel construction process in the prior art, a plurality of anchor rod holes are drilled between the tunnel to be constructed and the existing railway bridge, and then anchor rods are inserted into the anchor rod holes and grouting reinforcement is carried out, so that the geological strength around the existing railway bridge is achieved, and the influence on the existing railway bridge in the tunnel excavation process is reduced as much as possible. In this way, although the influence on the existing railway bridge can be reduced, when the vibration force is too large in the tunnel excavation process, the vibration force can be transmitted to the existing railway bridge along the geological layer, and deformation or displacement of the railway bridge foundation and the upper structure with different degrees can still be caused. Disclosure of utility model The utility model aims to solve the defects in the prior art, and provides a pier reinforcing device for construction of a side-passing railway bridge of a shield tunnel. In order to achieve the above purpose, the present utility model adopts the following technical scheme: The utility model provides a shield tunnel side is worn pier reinforcing apparatus for railway bridge construction, includes the railway pier of geological formation's pre-excavation tunnel, geological formation top, and the basis pier stud of railway pier sets up in geological formation, and the geological formation between railway pier and the pre-excavation tunnel sets up first diaphragm wall, second diaphragm wall and third diaphragm wall downwards, and first intermediate layer intussuseption between first diaphragm wall and the second diaphragm wall is filled with concrete reinforcing liquid and is strengthened, is equipped with the buffering reinforcement in the second intermediate layer between second diaphragm wall and the third diaphragm wall. Preferably, the upper surface of the geological layer is provided with a process groove, and the first continuous wall, the second continuous wall and the third continuous wall are all arranged in the process groove. Preferably, the buffer reinforcement comprises a plurality of 'bow' -shaped reinforcing rods, two ends of each reinforcing rod are fixed on one side of the third continuous wall, and the reinforcing rods are staggered and overlapped and fixed with each other. Preferably, a reinforcement cage is disposed within the first interlayer. Preferably, the anchor rod is inserted downwards in the first interlayer, extends upwards to the top of the first interlayer, penetrates through the center of the reinforcement cage, and is fixed with the reinforcement cage through the connecting rod. The bridge pier reinforcing device for the side-through railway bridge construction of the shield tunnel has the beneficial effects that the second interlayer is arranged, and only the buffer reinforcing part exists in the second interlayer, so that the pre-excavated tunnel and the railway bridge pier are completely isolated, and the disturbing force is eliminated in the second interlayer in the process of excavating the tunnel. Drawings FIG. 1 is a process layout of the present utility model; fig. 2 is a schematic view of the basic structure of the reinforcing apparatus of the present utility model. Detailed Description The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantage