Open caisson underwater efficient soil taking platform device used under complicated geological conditions

Abstract

The invention provides an open caisson underwater efficient soil taking platform device used under complicated geological conditions. Drilling machine devices and mud suction pipes are arranged on a waterproof sealed platform in a staggered manner. Drill bits of the drilling machine devices extend out of the bottom of the waterproof sealed platform. The tips of the mud suction pipes extend out ofthe bottom of the waterproof sealed platform. Rotary spray nozzles are further arranged at the bottom of the waterproof sealed platform and are connected with high-pressure water pipes. Due to the adoption of the combination of the manner of conducting jetting through the multiple high-pressure water pipes and the manner of arranging the multiple mud suction pipes and the multiple drilling machinedevices in the staggered manner, complicated soil layers are systematically broken, the mud suction operation is then conducted after the complicated soil layers are broken, and the soil taking efficiency is substantially improved. By means of a high-pressure water jetting system, the breaking efficiency of soil bodies at the interval positions of the drilling machine devices can be ensured, thedrill bits can also be flushed in real time, it is avoided that clay hardens on the drill bits, and therefore the soil taking working face is greatly expanded and the soil taking efficiency is improved. If the open caisson underwater efficient soil taking platform device meets clay layers, by regulating the water jetting pressure and the rotating speed of a stepless speed regulator, normal soil taking of the soil breaking working face can be ensured.

Description

technical field [0001] The invention relates to the technical field of underwater excavation of large caissons, in particular to a high-efficiency underwater earth-taking platform device for caissons under complex geological conditions. Background technique [0002] With the construction of large bridges, the foundation form of large caissons has been more and more widely used, and the excavation and sinking methods of large caissons have also received more and more attention. When the caisson is excavated underwater and sinks, the caisson support cannot be well obtained due to the unknown mud surface elevation. Combined with factors such as underwater excavation, the current underwater mud suction equipment has the problem of low efficiency. How to strengthen it The efficiency of underwater mud suction operation of caissons determines whether the construction of large caissons is fast and efficient. However, traditional underwater soil extraction methods for caissons, such...

AI Technical Summary

Problems solved by technology

When the caisson is excavated underwater and sinks, because the elevation of the underwater mud surface is unknown, the support of the caisson cannot be obtained well. Combined with factors such as underwater excavation, the current underwater mud suction equipment has the problem of low efficiency. How to strengthen it The efficiency of underwater mud suction operation of caissons determines whether the construction of large caissons is fast and efficient.

However, traditional underwater soil extraction methods for caissons, such as the simple hydraulic mud suction method, can no longer meet the needs of rapid soil extraction for caissons under underwater conditions, and mainly have the following disadvantages:

[0003] 1) The hydraulic dredging method is greatly affected by the water depth, and the application conditions are relatively harsh

[0004] 2) It is difficult to take soil when facing clay layer and cemented rock layer

[0005] 3) The degree of mud suction of a single mud suction device is uneven, resulting in low overall efficiency

However, when dealing with complex address conditions, the larger diameter of the scraper leads to a more laborious structure of the scraper, especially the smaller resistance at the edge of the scraper requires a larger torque to overcome, and the effect of breaking the soil is not ideal.

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