Construction method of deep and thick soft soil foundation bed bridge abutment

A construction method and soft soil technology, applied in the direction of bridges, bridge construction, erection/assembly of bridges, etc., can solve the problems of excessive settlement of structures, damage to the foundation by soft soil, uneven settlement, etc. The effect of facilitating engineering quality and reducing settlement differences

Active Publication Date: 2013-07-31
TIANJIN 20 CONSTR
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Problems solved by technology

[0002] Soft soil is extremely harmful to the foundation. If it is not treated or handled improperly, it will cause the foundation to become unst

Method used

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  • Construction method of deep and thick soft soil foundation bed bridge abutment
  • Construction method of deep and thick soft soil foundation bed bridge abutment
  • Construction method of deep and thick soft soil foundation bed bridge abutment

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Embodiment Construction

[0024] In order to further understand the invention content, characteristics and effects of the present invention, the following examples are given, and detailed descriptions are as follows in conjunction with the accompanying drawings:

[0025] see Figure 1 to Figure 7 , a deep soft soil foundation abutment construction method, comprising the following steps:

[0026] 1) A land area is formed after sand dredging in the water area, and the elevation of the top surface of the dredged sand is higher than that of the water surface, forming the construction area of ​​the abutment land area. at least 50m behind;

[0027] In the vicinity of the abutment foundation area, the original water area is dredged and filled with sand to form the bridge abutment land area construction area. From bottom to top, the bridge abutment land area construction area is silt layer 2 and dredged sand layer 1. The dredged fill sand is medium-fine sand, Particles with a particle size larger than 0.075m...

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Abstract

The invention discloses a construction method of a deep and thick soft soil foundation bed bridge abutment. The method comprises steps as follows: 1) forming a bridge abutment land construction area; 2) performing primary soft foundation treatment-vacuum water covering and pre-pressing treatment on the bridge abutment land construction area; 3) performing bridge abutment pile foundation construction and bearing platform construction; 4) performing secondary soft foundation treatment-composite foundation treatment on the bridge abutment land construction area; 5) backfilling the area behind the bridge abutment with a filler; and 6) completing the construction of a bridge abutment concrete structure. According to the construction method, due to the secondary soft foundation treatment, post-construction settlement of a road behind the bridge abutment and settlement differences between the road and a bridge abutment structure are reduced, and the phenomenon that a vehicle bumps at a bridge head can be prevented. The construction method of the deep and thick soft soil foundation bed bridge abutment is simple, convenient and feasible, high in efficiency, safe and reliable, and can control the project quality conveniently and save labor power, material resources and financial resources. The construction method is applicable to an area with a low foundation bearing capacity.

Description

technical field [0001] The invention relates to an abutment construction method, in particular to an abutment construction method on a deep soft soil foundation. Background technique [0002] Soft soil is extremely harmful to the foundation. If it is not treated or handled properly, it will cause the foundation to be unstable, cause the structure to settle excessively or unevenly, and cause damage to the structure to varying degrees or even be completely scrapped. Fill the abutment for preloading, and when building the embankment, fill the soil higher than the design level in advance, and widen the width of the filling to accelerate the consolidation and sinking of the foundation, and then excavate the overfilled part later. The method of preloading or overloading preloading is simple and easy to implement, but it takes a long time for consolidation, and the road at the bridge connecting slope will have a large post-construction settlement, which will have a significant diff...

Claims

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Application Information

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IPC IPC(8): E01D21/00
Inventor 肖策褚丝绪孟繁奇穆佳姜云龙姜宇昆徐国良柳旭赵丙臣
Owner TIANJIN 20 CONSTR
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