A system of expanding piles into a wall at the bottom of a concrete guide wall foundation

A foundation bottom, concrete technology, applied in the repair of foundation structure, foundation structure engineering, sheet pile wall and other directions, can solve the problems affecting the service period and service safety of hydropower stations, and achieve the improvement of anti-scouring performance and increase service period. Effect

CN113026688BActive Publication Date: 2022-04-22SINOHYDRO FOUND ENG
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2022-04-22

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Abstract

The invention discloses a system for expanding hard rock piles at the bottom of a concrete guide wall foundation to form a wall. After a plurality of wall sections, the bottom bedrock expansion pile construction with two pile holes as a group is carried out for each wall section, including: excavating the first pile hole and the second pile hole in the wall section Rotary drilling rig; a drilling tool for drilling the corresponding side of the predetermined area of ​​the partition wall between two pile holes, which can connect the two pile holes to form a connecting hole; for drilling the connecting hole The pouring device for concrete pouring treatment, so that the communication hole becomes an anti-seepage pile wall with two anti-scourion piles and the lower parts of the two anti-scourion piles are connected as one; multiple anti-seepage pile walls of multiple wall sections are connected to form for reinforcement The impervious wall of the concrete guide wall foundation. The system of the present invention can form an anti-seepage wall on the bottom side of the concrete guide wall, and completely solve the problem of cleaning the foundation of the concrete guide wall.
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Description

technical field

[0001] The invention relates to the field of water conservancy and hydropower engineering, in particular to a system for expanding piles from bedrock at the bottom of a concrete guide wall foundation to form a wall. Background technique

[0002] my country has a vast territory, a large population, shortage of water resources, large differences in time and space distribution, and frequent floods and droughts. For a long time, our people have benefited from water and suffered from water, and have fought against floods and droughts for a long time. Since the founding of the People's Republic of China, water conservancy construction has made remarkable achievements. There are many various types of power stations in operation. During the long-term operation of the power station, affected by hydraulic erosion, the foundation of the concrete guide wall has been washed away, and hollowing has occurred in some areas at the bottom.

[0003] However, if the bottom of ...

Examples

Embodiment Construction

[0065] In order to solve the anti-washing problem of the bottom foundation of the original concrete guide wall of the hydropower station, and completely solve the hydraulic connection between the inside and outside of the guide wall (that is, water can flow from one side of the guide wall bottom to the other side, resulting in the bottom of the guide wall being hollowed out), the present invention People have developed a system for expanding piles at the bottom of the concrete guide wall foundation to form a wall. After the first wall section, each wall section is constructed with two pile holes as a group of bottom bedrock expansion piles to form a cut-off wall for reinforcing the foundation of the concrete guide wall (such as Figure 1a shown).

[0066] The system of expanding piles into the wall at the bottom of the foundation of the concrete guide wall foundation can adopt the following methods: Figure 1b The shown structure includes: a rotary drilling rig 301 ( Such as ...