A method for reinforcing a bridge using a foundation

Abstract

The application discloses a method for reinforcing a bridge foundation, comprising the following steps: removing an old bridge, planting a steel bar, and pouring concrete. The step of removing the old bridge comprises the following steps: removing a bridge span structure of the old bridge, removing a pier and an abutment of the old bridge, marking a foundation depth to be removed, and removing the foundation to a marked position. The step of planting the steel bar comprises the following steps: planting a plurality of connecting steel bars on an upper surface of the removed foundation, and surrounding an outer periphery of the foundation with a pouring formwork. The step of pouring the concrete comprises the following steps: pouring the concrete into the pouring formwork, so as to restore an overall height of the foundation to a height above the height before the foundation is removed, and to connect the old foundation and the new foundation into an entirety. The method reduces the engineering quantity, reduces the engineering cost, and shortens the construction period.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge foundation construction technology, and particularly relates to a method for reinforcing a bridge foundation. BACKGROUND

[0002] A bridge is composed of an upper structure and a lower structure. The upper structure is a bridge structure, and the lower structure includes a pier, an abutment and a foundation. The general contracting of the rural highway bridge safety guarantee improvement project (WQGZ01 bid section) in Guangdong Province in 2021 contains 174 dangerous bridges in four cities, namely, Jiangmen, Yangjiang, Maoming and Zhanjiang. When rebuilding a bridge, the old bridge is generally rebuilt at the original site, so the old bridge needs to be demolished, and then a bridge with the same span and width is rebuilt. As a result, not only is the engineering cost high, but also the construction period is prolonged. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, the purpose of the present application is to provide a method for reinforcing a bridge foundation, which reduces the engineering quantity, thereby reducing the engineering cost and shortening the construction period.

[0004] The purpose of the present application is achieved by the following technical scheme:

[0005] A method for reinforcing a bridge foundation, comprising the following steps:

[0006] The old bridge is demolished, the bridge span structure of the old bridge is demolished, the pier and abutment of the old bridge are demolished, the depth of the foundation to be removed is marked, and then the foundation is removed to the elevation position;

[0007] The step of planting a steel bar: a plurality of connecting steel bars are planted on the upper surface of the removed foundation, and then a pouring formwork is arranged around the periphery of the foundation;

[0008] The pouring step: pouring concrete into the pouring formwork to restore the overall height of the foundation to above the height before the foundation is removed, so as to connect the old foundation and the new foundation into one body.

[0009] Further, in the step of demolishing the old bridge, the excavator is used to excavate the soil near the foundation, when excavated to the preset position, the silt above the foundation is cleaned, and then the foundation is removed.

[0010] Further, it further comprises a backfilling step: after restoring the overall height of the foundation, the excavator is used to fill the soil into the nearby pit of the foundation.

[0011] Further, when the water flow is large, the soil excavated by the excavator is blocked on the riverbed of the river to form a waterproof wall.

[0012] Further, in the step of demolishing the old bridge, the depth of the foundation to be removed is marked to be more than 500mm.

[0013] Furthermore, during the demolition of the old bridge, the depth of the foundation to be removed was marked as being between 500mm and 1000mm.

[0014] Furthermore, during the demolition of the old bridge, workers manually removed the old foundation down to the required elevation.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0016] 1. By removing a certain depth from the foundation of the old bridge and retaining the remaining part of the foundation, it is not necessary to rebuild the entire foundation. In other words, the old foundation is used as part of the foundation of the new bridge, thereby saving the amount of work required to completely rebuild the foundation, improving the overall reconstruction efficiency of the bridge, shortening the construction period, and reducing the project cost.

[0017] 2. In addition, by inserting multiple connecting steel bars into the upper surface of the excavated foundation, the connecting steel bars securely connect the old foundation to the concrete to ensure the overall stability of the new foundation; and by pouring concrete, the newly built abutment can be securely fixed to the new foundation.

[0018] 3. Moreover, based on the fact that the old foundation has settled over the years, the structure is relatively stable. Using the old foundation as a support point can make the new bridge more reliable. Detailed Implementation

[0019] The present invention will be further described below through specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0020] It should be noted that when an element is described as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is described as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementations.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] A preferred embodiment of the present invention provides a method for foundation reinforcement of bridges, comprising the following steps: demolition of the old bridge, rebar installation, and pouring concrete.

[0023] The steps for demolishing an old bridge are as follows: the bridge span structure of the old bridge is demolished, the piers and abutments of the old bridge are removed, the depth of the foundation to be removed is marked, and then the foundation is removed to the elevation position. The remaining part of the foundation is retained, so there is no need to rebuild the entire foundation. That is, the old foundation is used as part of the foundation of the new bridge, thus saving the amount of work required to completely rebuild the foundation.

[0024] Rebar installation steps: Insert multiple connecting steel bars into the upper surface of the foundation after it has been chiseled out, and then use a casting formwork to surround the perimeter of the foundation.

[0025] Pouring steps: Pour concrete into the pouring template to restore the overall height of the foundation to above the height before the foundation was removed, so as to connect the old foundation and the new foundation into one, that is, to fix the old foundation and the poured concrete together securely by connecting steel bars, thereby forming the foundation of the new bridge.

[0026] Clearly, by removing a certain depth from the foundation of the old bridge and retaining the remaining portion, the entire foundation does not need to be rebuilt. This means using the old foundation as part of the new bridge's foundation, saving the amount of work required for complete foundation reconstruction. This improves the overall reconstruction efficiency, shortens the construction period, and reduces project costs. Furthermore, by embedding multiple connecting steel bars into the upper surface of the removed foundation, the old foundation is securely fixed to the concrete, ensuring the overall stability of the new foundation. Additionally, pouring concrete allows the newly constructed abutments to be firmly anchored to the new foundation. Moreover, given that the old foundation has undergone years of settlement and is structurally more stable, using it as a support point makes the new bridge more reliable.

[0027] Preferably, to facilitate construction, during the demolition of the old bridge, an excavator is used to excavate the soil near the foundation. When the predetermined position is reached, the mud and sand above the foundation are cleared, and then the foundation is chiseled away.

[0028] Preferably, the method also includes a backfilling step: after restoring the overall height of the foundation, soil is used to fill the depressions near the foundation using an excavator to improve the strength and stability of the new foundation.

[0029] Preferably, when the water flow is large, the soil excavated by the excavator forms a water barrier on the riverbed to prevent the water flow from covering the construction site.

[0030] Preferably, during the demolition of the old bridge, the depth of the foundation to be removed is marked as being at least 500mm. Specifically, during the demolition of the old bridge, the depth of the foundation to be removed is marked as being between 500mm and 1000mm.

[0031] To prevent damage to the foundation caused by excessive force during the dismantling process of mechanical equipment, it is preferable that, during the demolition of the old bridge, the old foundation is manually removed down to the required elevation by workers.

[0032] The above embodiments are merely preferred embodiments of the present invention and should not be construed as limiting the scope of protection of the present invention. Any non-substantial changes and substitutions made by those skilled in the art based on the present invention shall fall within the scope of protection claimed by the present invention.

Claims

1. A method for foundation reinforcement of bridges, characterized in that, Includes the following steps: Demolition steps for the old bridge: Demolish the bridge span structure, remove the bridge piers and abutments, mark the depth of the foundation to be removed, and then remove the foundation to the elevation position. Rebar installation steps: Insert multiple connecting steel bars into the upper surface of the foundation after it has been chiseled out, and then use a casting formwork to surround the perimeter of the foundation. Pouring steps: Pour concrete into the pouring template to restore the overall height of the foundation to above the height before the foundation was removed, so as to connect the old foundation with the new foundation as one unit; During the demolition of the old bridge, an excavator was used to excavate the soil near the foundation. When the predetermined position was reached, the mud and sand above the foundation were cleared, and then the foundation was chiseled away. It also includes a backfilling step: after restoring the overall height of the foundation, soil is used to fill the depressions near the foundation using an excavator.

2. The method for foundation reinforcement of bridges as described in claim 1, characterized in that: When the water flow is strong, the soil excavated by the excavator forms a water barrier on the riverbed.

3. The method for foundation reinforcement of bridges as described in claim 1, characterized in that: During the demolition of the old bridge, the foundation to be removed was marked to be at a depth of more than 500mm.

4. The method for foundation reinforcement of bridges as described in claim 3, characterized in that: During the demolition of the old bridge, the depth of the foundation to be removed was marked as being between 500mm and 1000mm.

5. A method for foundation reinforcement of bridges as described in claim 1, characterized in that: During the demolition of the old bridge, workers manually removed the old foundation down to the required elevation.