Vertical compound tunneling technology

Abstract

The invention relates to a vertical combined tunnel boring process. The system comprises a drilling machine base plate (103), wherein a manipulator (101) is arranged on the drilling machine base plate(103), a drill rod moving device (102) is positioned next to the drilling machine base plate (103), two sealing platforms (104) are slidably arranged on the drilling machine base plate (103), a drillrod assembly (105) is vertically clamped between the two sealing platforms (104), a portal frame (106) is arranged on the drilling machine base plate (103), and a power head (108) arranged on the portal frame (106) drives the drill rod assembly (105) ; the bottom of the portal frame (106) is hinged with the drilling machine base plate (103) through a pin shaft, and both ends of a reverse oil cylinder (107) are respectively hinged with the portal frame (106) and the drilling machine base plate (103). The vertical combined tunnel boring process has the advantages of higher tunneling efficiency,better tunneling effect, low overall construction cost, high construction efficiency and capability of constructing under severe weather conditions.

Description

technical field [0001] The invention relates to an excavation process, in particular to a vertical composite excavation process applied to drilling and excavation operations in marine operating environments, and belongs to the technical field of offshore construction. Background technique [0002] At present, in the construction of offshore wind power, the large-diameter single-pile rock-socketed drilling method carried out by the vertical compound tunneling system has been widely used; for the vertical compound tunneling system, the factors that determine its performance are: ① Applied ② The torque provided to the drill bit ③ The speed of the drilling tool ④ The maximum lifting capacity ⑤ The efficiency of removing drilling slag from the working face; [0003] Nowadays, in the actual use process, it is found that the performance of conventional tunneling systems has the following shortcomings: ① Insufficient WOB, WOB ≤ 150T; ② Insufficient torque, torque ≤ 1000KN.m; ③ Low s...

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Problems solved by technology

[0003] Nowadays, in the actual use process, it is found that the performance of conventional tunneling systems has the following shortcomings: ① Insufficient WOB, WOB ≤ 150T; ② Insufficient torque, torque ≤ 1000KN.m; ③ Low slag discharge efficiency, only one suction port;

[0005] Moreover, conventional rock-socketed drilling equipment disassembles and assembles drill pipes by means of cranes and manual operations, which is not only inefficient, but also the assembly effect is not satisfactory; at the same time, in conventional rock-socketed drilling equipment, the The poles are usually piled up on the deck platform in a horizontal manner. When hoisting, they need to be turned over to the vertical state before they can be disassembled, which undoubtedly further reduces their construction efficiency; and the safety performance of the horizontal stacking method is not good, especially in In the case of severe wind and waves, the drill pipe is prone to rolling, which affects its construction progress;

[0006] At the same time, conventional drilling rigs use the principle of decompression drilling to carry out drilling work, that is, the drilling pressure on the rock surface of the drill bit is completely generated by its own weight, and the drilling pressure is often insufficient; conventional drilling rigs use multiple hydraulic motors to provide torque for the drill bit. The torque provided by it is generally low, which affects the speed of rock-socketed drilling;

[0007] In addition, for the structure of the drill bit on the drill pipe, conventional drill bits use a slag outlet, and in actual use, it is found that there are problems such as large tool wear and low rock breaking efficiency; because of the relationship between a slag outlet, the mud travels to The distance of the slag discharge port of the cutter head is longer, which increases the ineffective crushing of the drill bit by the drill bit, resulting in increased tool wear and shortened tool life; at the same time, conventional drill bits need to be replaced with different tools when facing different geological environments, such as A hob is required for the rock layer, and a scraper is required for the clay layer. Once encountering a stratum with unknown geological conditions, it is necessary to judge the geological structure according to the drilling parameters and replace the cutting tool in a timely manner, which seriously affects the construction efficiency.

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