Bridge pile-bucket combined foundation and construction method thereof

Abstract

The invention discloses a bridge pile-bucket combined foundation and a construction method thereof, which relate to bridge construction technology. The bridge pile-bucket combined foundation comprises a bucket and bored piles, and is characterized in that: the wall of the bucket is provided with vertical spaced pile holes, a first partition is arranged on an inner bucket wall to divide the cavity of the bucket wall into an upper cavity and a lower cavity, a second partition is arranged in the upper cavity to divide the upper cavity into partitioned upper cavity units, and the center of the second partition is provided with a working hole, which runs through the first partition and communicates with the lower cavity. Since the bridge pile-bucket combined foundation combines the bucket foundation and the bored piles together, the vertical bearing capability of the bucket foundation is enhanced, and the post-construction settlement of the foundation is reduced. Because the bucket foundation serves as a bored pile construction platform, in the process of pile foundation construction, a cofferdam does not need to be built any more, pile casings do not need to be settled any more, and consequently, not only is the size of the pile foundation reduced, but also the construction cost is greatly reduced. The invention has low requirement on construction equipment, water injection in the partitioned cavities is adopted as a foundation-sinking and deflection-correcting measure in the process of construction, and the problem of difficult deflection correction in the sinking process of the bucket foundation is solved.

Description

technical field [0001] The invention belongs to bridge construction technology, in particular to a bridge pile-bucket combined foundation and a construction method thereof. Background technique [0002] The barrel-shaped foundation has the advantages of wide application range of load environment, low investment cost and short construction time, and has been widely used in marine engineering. However, due to its insufficient vertical bearing capacity, large post-construction settlement, and difficulty in correcting deviation during the subsidence and penetration process, it cannot yet be used as a bridge foundation. [0003] As a widely used bridge foundation form, the pile foundation has the characteristics of high vertical bearing capacity and simple construction technology. However, as the deep water foundation of the bridge, its scale will be very large, and the construction of the pile foundation needs to build a huge cofferdam. ,higher cost. SUMMARY OF THE INVENTION ...

AI Technical Summary

Problems solved by technology

However, due to its insufficient vertical bearing capacity, large post-construction settlement, and difficulties in correcting deviations during the sinking process, it cannot be used as a bridge foundation.

[0003] As a widely used form of bridge foundation, pile foundation has the characteristics of high vertical bearing capacity and simple construction technology, but as a bridge deep water foundation, its scale will be very large, and it is often necessary to build a huge cofferdam during pile foundation construction ,higher cost

Images