Bridge pile protecting and reinforcing structure

Abstract

A bridge pile protecting and reinforcing structure comprises two sets of MJS construction method piles, a shield tunnel, two sets of bridge pier bearing platforms and bridge piles fixedly connected to the lower portions of the bridge pier bearing platforms, the shield tunnel is arranged between the two sets of MJS construction method piles, a plurality of sets of sleeve valve pipes are arranged in the shield tunnel and evenly distributed at the upper end of the interior of the shield tunnel, and a plurality of sets of sleeve valve pipes are arranged in the shield tunnel. The inner sides of the two bridge pile bearing platforms are fixedly connected with concrete supporting beam structures. The sleeve valve pipe is arranged, the overall soil body reinforcing effect is provided for the interval between the bridge pile and the shield tunnel, the vertical MJS construction method piles are arranged on the outer side of the shield tunnel, the MJS construction method piles surround the outer side of the shield tunnel to form pile foundation isolation protection, and the method is suitable for pile foundation protection under the construction condition that the shield tunnel is close to the viaduct pile; the anti-shearing capacity and the bearing capacity of the MJS construction method pile are improved, the double supporting effect of the pile foundation is further provided, the bridge-related section in the shield section is effectively reinforced, and then the long-term stability of the bridge pile and the bridge pier is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to subway construction technical field, concretely relates to a bridge pile protection reinforcing structure. BACKGROUND

[0002] With the rapid development of urbanization and industrialization in China, the city scale is getting larger and larger, and the demand of subway and viaduct in China is increasing. In the process of subway construction, the shield excavation of subway interval tunnel will cause stress disturbance to the adjacent viaduct pile, which will cause the destruction of the bridge pile and the bridge pier, and affect the long-term stability of the viaduct. The stress environment of the adjacent bridge pile is changed during the shield excavation process, which reduces the lateral earth pressure of the soil on the bridge pile, resulting in the settlement of the soil around the bridge pile, thereby reducing the vertical bearing capacity of the bridge pile. In addition, the lateral displacement of the soil will generate horizontal additional force on the bridge pile, which will weaken the stability of the bridge pile. Therefore, the bridge pile support during the shield construction of the adjacent viaduct pile has become a big problem in the excavation of the interval tunnel of the subway station in some areas of China.

[0003] For the influence of subway tunnel shield excavation on the adjacent viaduct pile, some measures are adopted in the engineering field to support the bridge pile. For example, separate jet grouting pile or sleeve valve pipe is used to grout around the bridge pile to reinforce the viaduct pile, and steel plate reinforcement method is used to reinforce the bridge pile. Among them, the separate jet grouting pile grouting is not convenient for supplementary grouting when the bridge is abnormal in the subway construction, and the separate sleeve valve pipe cannot achieve the effect of permanent support of the bridge pile due to its small load capacity. Therefore, these reinforcement and support measures have certain limitations. UTILITY MODEL CONTENTS

[0004] In order to solve the above technical problems, a bridge pile protection reinforcing structure is provided, which solves the problem that the separate jet grouting pile grouting is not convenient for supplementary grouting when the bridge is abnormal in the subway construction, and the separate sleeve valve pipe cannot achieve the effect of permanent support of the bridge pile due to its small load capacity. Therefore, these reinforcement and support measures have certain limitations.

[0005] In order to achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A bridge pile protection reinforcing structure, comprising two groups of MJS method piles, a shield tunnel, two groups of bridge pier pile caps and bridge piles fixedly connected below the bridge pier pile caps, the shield tunnel is arranged between the two groups of MJS method piles, a plurality of groups of sleeve valve pipes are arranged inside the shield tunnel, the plurality of groups of sleeve valve pipes are uniformly distributed on the inner upper end of the shield tunnel, and the two groups of bridge pier pile caps are fixedly connected with concrete support beam structures on the inner sides.

[0007] Preferably, the MJS method pile is inserted with a profile steel.

[0008] Preferably, the steel section is inserted vertically as a single piece, and the number of welded joints does not exceed one.

[0009] Preferably, the spacing between adjacent MJS method piles is equal, and the spacing between adjacent sleeve valve pipes is equal.

[0010] Preferably, the sleeve valve tube is a grouting structure.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: by setting up the sleeve valve pipe, it provides an overall soil reinforcement effect for the bridge pile and shield tunnel section. Vertical MJS method piles are arranged on the outside of the shield tunnel. The MJS method piles surround the outside of the shield tunnel to form pile foundation isolation protection. It is suitable for pile foundation protection under the condition of shield tunnel close to viaduct pile construction. It improves the shear resistance and bearing capacity of the MJS method piles and also provides a double support effect for the pile foundation, realizing effective reinforcement of the bridge section in the shield tunnel section, thereby ensuring the long-term stability of the bridge piles and piers. Attached Figure Description

[0012] Fig. 1 This is a schematic diagram of the overall planar structure according to the present invention;

[0013] Fig. 2 This is a schematic cross-sectional view of the present invention;

[0014] Fig. 3 This is a three-dimensional structural diagram according to the present invention.

[0015] The numbers on the map are:

[0016] 1. Concrete support beam; 2. MJS method pile; 3. Sleeve valve pipe; 4. Internal steel section; 5. Crown beam; 6. Concrete pad of support beam; 7. Pier cap; 8. Bridge pile; 9. Shield tunnel. Detailed Implementation

[0017] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0018] Example 1

[0019] Please refer to Figs. 1-3 As shown, a bridge pile protection and reinforcement structure includes two sets of MJS method piles 2, a shield tunnel 9, two sets of bridge pier caps 7, and bridge piles 8 fixedly connected to the bottom of the bridge pier caps 7. The shield tunnel 9 is located between the two sets of MJS method piles 2. Several sets of sleeve valve pipes 3 are installed inside the shield tunnel 9. The multiple sets of sleeve valve pipes 3 are evenly distributed at the upper part of the shield tunnel 9. Concrete support beam structures 1 are fixedly connected to the inner side of the two sets of bridge pile caps 7.

[0020] In this scheme, the pier cap 7 is located on the side above the subway tunnel 9. MJS method piles 2 are constructed on the outside of the subway tunnel 9 to isolate and protect the bridge piles 8. Concrete support beams 1 are arranged on the inside of the pier cap 7 to support the bridge piles 8, which can provide lateral support and restraint to the bridge piles 8. A 0.5m thick concrete pad layer 6 is set at the bottom of the concrete support beam 1. Sleeve valve pipes 3 are pre-embedded in the soil between the bridge piles 8 and the shield tunnel 9. Grouting is carried out in time after the pipes are buried to reinforce the soil.

[0021] The MJS method pile 2 has steel sections 4 inserted inside, which can increase the overall strength of the MJS method pile 2.

[0022] Section 4 is inserted vertically as a single piece, and the number of welded joints does not exceed 2.

[0023] The spacing between adjacent MJS method piles 2 is equal, and the spacing between adjacent sleeve valve pipes 3 is equal.

[0024] Sleeve valve pipe 3 is a grouting structure.

[0025] The working principle and usage process of this utility model are as follows: First, in the MJS pile area, grouting holes are drilled at equal intervals between the bridge pier cap 7 and the shield tunnel 9. Then, a triple jet grouting equipment is used to perform grouting operations in the drilled holes and insert steel sections 4. Next, sleeve valve pipe grouting reinforcement construction is carried out. Sleeve valve pipes 3 are arranged longitudinally at equal intervals in the soil between the shield tunnel 9 and the MJS method pile 2, and grouting is performed in a timely manner to achieve the reinforcement effect on the soil around the bridge pile 8. Subsequently, the support beam 1 is excavated to the bottom of the concrete cushion 6 according to the excavation requirements of the design specifications, and the concrete cushion 6, support beam 1 and cap beam 5 are constructed in sequence.

[0026] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A bridge pile protection and reinforcement structure, comprising two groups of MJS method piles (2), a shield tunnel (9), two groups of pier caps (7), and bridge piles (8) fixedly connected below the pier caps (7), the shield tunnel (9) is arranged between the two groups of MJS method piles (2), a plurality of groups of sleeve valve pipes (3) are arranged inside the shield tunnel (9), the plurality of groups of sleeve valve pipes (3) are uniformly distributed on the upper end inside the shield tunnel (9), and the two groups of pier caps (7) are fixedly connected with concrete support beam structures (1) on the inner sides.

2. A bridge pile protection and reinforcement structure according to claim 1, characterized in that: The top of the MJS method pile (2) is provided with a corbel (5).

3. A bridge pile protection and reinforcement structure according to claim 1, characterized in that: The MJS method pile (2) is inserted with a profile steel (4) inside.

4. A bridge pile protection and reinforcement structure according to claim 3, characterized in that: The profile steel (4) is integrally vertically inserted, and the number of welded joints is not more than 2.

5. A bridge pile protection and reinforcement structure according to claim 1, characterized in that: The spacing between the adjacent MJS method piles (2) is equal, and the spacing between the adjacent sleeve valve pipes (3) is equal.

6. A bridge pile protection and reinforcement structure according to claim 1, characterized in that: The sleeve valve pipe (3) is a grouting structure.

Images