A double-row pile and front support grouting steel pipe combined foundation pit supporting structure

By using a combination of double-row piles and front-supported grouting steel pipes for foundation pit support, the problems of insufficient stability and construction disturbance of traditional support structures under complex geological conditions are solved, achieving a construction effect of high stability and low disturbance.

CN224468386UActive Publication Date: 2026-07-07CHINA CONSTR FOURTH BUREAU WUHU CONSTR INVESTMENT CO LTD +2
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
CHINA CONSTR FOURTH BUREAU WUHU CONSTR INVESTMENT CO LTD
Filing Date
2025-04-22
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Traditional single-row anti-slide piles and anchor cable structures are not effective in controlling the horizontal displacement of the pile top and adapting to complex geological conditions. They are also costly to construct and affect underground pipelines of nearby buildings. Traditional double-row pile structures cannot achieve micro-disturbance effects under complex geological conditions.

Method used

A combined foundation pit support structure using double-row piles and front-supported grouting steel pipes is adopted. The combination of front-row piles, rear-row piles, pile top connecting beams, capping plates, and front-supported grouting steel pipes forms a statically indeterminate structure, enhancing overall stability and reducing the impact of construction on adjacent buildings.

Benefits of technology

It improves the overall stability and overturning resistance of double-row piles, reduces the disturbance to adjacent buildings during construction, is suitable for complex geological conditions, and reduces construction costs.

✦ Generated by Eureka AI based on patent content.

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    Figure CN224468386U_ABST
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Abstract

The utility model discloses a double-row pile and front support grouting steel pipe combined type foundation pit support structure, include: front row stake 1 and back row stake 2, both longitudinal parallel arrangement, transverse rectangular parallel arrangement, both between the pile top is equipped with the pile top link beam 5, and the crown beam of front row stake 1 pile top is connected front support grouting steel pipe 7. Front row stake, back row stake are all bored pile, and the front row stake is closely arranged, and the pile spacing of back row stake 2 is 3 times of the front row stake spacing. The roof plate 6 is located between the front row stake and back row stake pile top, and the double-row pile is connected with the roof plate 6 through the link beam 5 and forms the whole. This structure has higher stability, so under the condition of most weak soil geology or poor geological condition, is also applicable, and the construction of this structure has smaller influence scope to the environment, reduces the influence problem of the underground pipeline, pipeline etc. of adjacent building in the project, therefore has reliable application, easy operation and other process characteristics.
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