Gravity wharf built on silt foundation and its construction method

Abstract

The invention discloses a gravity wharf built on a silt foundation and a method for constructing the gravity wharf. The method for constructing the gravity wharf includes (1), designing a wharf structure and a foundation, reinforcing a composite foundation of the silt foundation by sand compaction piles and determining the bearing capacity, a sand pile replacement rate and a reinforcing range of the designed foundation of the wharf; (2), excavating a foundation trench, specifically, excavating the foundation trench until the depth of an excavated part of the foundation trench is smaller than a bottom elevation of the foundation trench and the difference between the depth of the excavated part of the foundation trench and the bottom elevation of the foundation trench is not smaller than one times the diameter of each sand compaction pile, constructing the sand piles, detecting the compactness of the sand piles after the sand piles are completely constructed, determining or re-determining the bottom elevation of the foundation trench, and secondarily excavating the foundation trench; (3), constructing a rock rip-rap foundation bed, performing rock rip-rap and leveling the top surface of the foundation bed; (4), mounting a precast caisson and enabling the top surface of the precast caisson to be higher than a construction water level; (5), performing rock rip-rap on the inside of the caisson; (6), constructing an upper structure of the wharf; (7), determining a rear backfill structural form and a backfill loading mode of the wharf, and performing rear backfill loading construction on the wharf. The gravity wharf and the method have the advantages that the bearing capacity of the foundation can be greatly improved, and influence of back-silting in a wharf construction procedure can be overcome.

Description

technical field [0001] The invention belongs to the field of wharf engineering, and in particular relates to a gravity type wharf built on a silt foundation and a construction method thereof. Background technique [0002] Gravity wharf has dual functions of wharf structure and retaining structure, and has a long history of use. However, the gravity wharf structure has high requirements on the bearing capacity of the foundation, and is generally suitable for places with good foundation conditions such as sandy soil and rock foundation. To build a gravity wharf on soft soil foundations such as clay and silt, reliable foundation reinforcement must be carried out. However, the bearing capacity of the foundation of muddy soil is extremely poor, it is very difficult to reinforce, and it often silts back quickly. During the construction process of the gravity wharf, foundation trench excavation, foundation bed formation, installation of the main structure of the wharf, and backfil...

AI Technical Summary

Problems solved by technology

However, the high-piled wharf has no soil-retaining function, and a separate soil-retaining structure needs to be built. When the muddy soil layer is deep and thick, the cost of the soil-retaining structure is often very high

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