Construction Method of Reinforcement of Dredging Fill by Reverse Method of Vacuum Dewatering Well

Abstract

The invention discloses a construction method for reinforcing dredger fill with a vacuum precipitation well reverse building method. The construction method comprises the following steps: step 1, a first section of steel casing is arranged on an original foundation; dredger fill is constructed at a position which is a certain distance from the top surface of the first section of steel casing; dredger fill construction is stopped; a second section of steel casing is detachably arranged on the upper part of the first section of steel casing; the dredger fill is constructed at a position which is a certain distance from the top surface of the second section of steel casing; circular alternate operation is performed until a preset dredging height is reached, and splicing of a steel casing is finished; step 2, a preassembled well casing is hoisted into the steel casing for assembling a vacuum precipitation well; and step 3, a water suction pump and a vacuum pump are started, and the section of steel casing at an upmost position is extracted until a last section of steel casing is extracted from top to bottom gradually, so that a moister content of the dredger fill is gradually lowered by the vacuum precipitation well. By adopting the construction method, the defect that the vacuum precipitation well cannot be arranged in the dredger fill for precipitation by adopting a drilling technique is overcome, and rapid reinforcement treatment for the dredger fill is realized.

Description

technical field [0001] The invention relates to the technical field of dredging fill reinforcement construction. More specifically, the present invention relates to a construction method of vacuum dewatering well reverse method for reinforcing dredging fill. Background technique [0002] With the development of economic construction, land resources are relatively becoming more and more scarce, and the human demand for marine space utilization is increasing. In recent years, China's coastal areas have developed rapidly. In the case of land resources shortage and high land acquisition costs, using coastal tidal flats and shallow sea resources to increase land resources is an effective means to solve this problem, and has huge social and economic benefits. However, dredger filling technology is the mainstream technology today. The nature of dredger filling soil engineering is very poor, the foundation treatment is difficult, time-consuming and expensive, and has become a bottl...

AI Technical Summary

Problems solved by technology

However, dredging filling technology is the mainstream technology today. The nature of dredging filling soil engineering is very poor, the foundation treatment is difficult, time-consuming and expensive, and has become a bottleneck for economic development in coastal areas.

[0003] Vacuum dewatering wells are more common in the field of general foundation treatment engineering by maintaining negative compression and short seepage diameter in the well to increase hydraulic gradient. However, vacuum dewatering wells are generally constructed by drilling holes first and then installing well pipes. , due to the approximate fluid characteristics of dredger fill, the general vacuum dewatering well construction method is not suitable for dredger fill construction

At present, there is no report on the application of vacuum dewatering wells to the construction process of dredger fill

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