Frame reinforcing system and method for channel underneath passing high-speed rail pier pile foundation

A technology for waterways and pile foundations, applied to sheet pile walls, shipping equipment, infrastructure engineering, etc., can solve the problems that reinforcement measures have not formed a system, cannot work together, and cannot guarantee the reinforcement effect, so as to reduce pile foundations and the environment. The effect of preventing the erosion of river water and optimizing the deployment of filling and excavation

Pending Publication Date: 2021-03-30
杭州京杭运河二通道建设投资有限公司 +3
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Under the condition of water-rich stratum, it is extremely difficult to carry out the construction of the underpass section of the pier foundation of the high-speed railway
However, the foundation reinforcement method of the current underpass project is relatively simple, only grouting or piling is carried out in the areas that need reinforcement, and various reinforcement measures may have achieved certain reinforcement effects; but for high-speed rail projects that require strict displacement control, The reinforcement measures in the prior art have not formed a system, cannot work together, and cannot guarantee the reinforcement effect
In particular, the excavation of the channel between two bridge piers has a narrow scope of work and extremely difficult construction, which greatly limits the application of traditional reinforcement methods

Method used

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  • Frame reinforcing system and method for channel underneath passing high-speed rail pier pile foundation
  • Frame reinforcing system and method for channel underneath passing high-speed rail pier pile foundation
  • Frame reinforcing system and method for channel underneath passing high-speed rail pier pile foundation

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Effect test

Embodiment 1

[0049] Such as figure 1 Shown is the reinforcement plan of the frame reinforcement system of the pier pile foundation of the high-speed railway under the newly opened channel of the present invention. The pier structure includes the high-speed railway pier 1, the pier cap 3 below the pier 1, and the pier pile foundation 2 below the pier cap 3 . figure 1 The pier structures on the left and right sides are shown in the figure. There is a channel foundation pit 21 under the bridge between the pier structures on both sides. The bottom of the channel foundation pit 21 is provided with a channel reinforcement area. fence pile.

[0050] Such as figure 2 , 3 As shown, in this embodiment, three rows of protective piles arranged along the direction of the waterway are adopted, and the protective piles on both sides of the waterway are arranged symmetrically. The enclosure piles include the outer pile 4 on the side span side, the middle pile 5 on the main span side close to the pier...

Embodiment 2

[0056] The frame reinforcement method of the pile foundation of the high-speed railway bridge pier passing under the newly opened waterway of this embodiment, such as Figure 1~6 As shown, the reinforcement method mainly includes foundation reinforcement of the underpass of the channel, reinforcement of pier pile foundation 2, support reinforcement of the underpass of the channel, excavation of foundation pit 21 of the channel under the bridge, paving and reinforcement of the bottom of the river bed, and construction of anti-collision facilities.

[0057] The construction method specifically includes the following steps:

[0058] (1) Base reinforcement in the underpass of the channel

[0059] A total of three rows of retaining piles are arranged on both sides of the bridge pier, and the retaining piles are arranged along the direction of the waterway; that is, the outer piles 4 are located on the side span side, and the middle piles 5 are located on the main span side and clos...

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Abstract

The invention discloses a frame reinforcing system and method for a channel underneath passing high-speed rail pier pile foundation. The method comprises the steps of reinforcing a channel underneathpassing section base, reinforcing a channel underneath passing section support, reinforcing the pier pile foundation, excavating a foundation pit under a bridge, paving and reinforcing a riverbed bottom and providing anti-collision facilities. The frame reinforcing system is designed from the three aspects of lateral displacement prevention, scouring prevention and collision prevention of the foundation, the displacement of the pier top of a pier is controlled within the deformation control standard in the construction period, the bridge structure and high-speed rail operation safety are not affected by channel excavation, and the pier is not impacted by ships in the channel operation process. The frame reinforcing system and method have the advantages that the reinforcing depth is large,the reinforcing effect is reliable, the water stopping performance is good, recycling is convenient, and the influence on the high-speed rail pier pile foundation and the environment is reduced to themaximum extent.

Description

technical field [0001] The invention belongs to the technical field of geotechnical and underground engineering, and in particular relates to a frame reinforcement system and a reinforcement method for pile foundations of high-speed railway bridge piers passing under a waterway. Background technique [0002] With the development of infrastructure construction, there are more and more infrastructure projects around high-speed railways. Long-distance, multi-trunk high-speed rail lines inevitably need to pass through various complex terrains, especially in the Yangtze River Delta region with developed water systems, where a considerable part of high-speed rail lines will meet rivers. In the Yangtze River Delta region, there are unfavorable factors such as thick soft soil layer, high soil moisture content, and low soil strength, resulting in weak natural foundation bearing capacity. However, the construction specification requirements of high-speed railways are higher than thos...

Claims

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Application Information

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IPC IPC(8): E02D5/64E02D5/46E02D19/12E02D5/04E02D5/16E02B3/12E02B3/26
CPCE02D5/64E02D5/46E02D19/12E02D5/04E02D5/16E02B3/12E02B3/26Y02A30/30
Inventor 郦纲陈秀瑛李继才顾祯雪楼伟中龚政李月先余杰孙阳吴腾
Owner 杭州京杭运河二通道建设投资有限公司
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