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Integrated pre-supporting tunneling device for shield tunneling of soft stratum and tunneling method of integrated pre-supporting tunneling device

A weak stratum and pre-support technology, which is applied in earthwork drilling, bolt installation, mining equipment, etc., can solve the problems of low degree of mechanization, high engineering cost, slow construction progress, etc., and achieve high excavation efficiency and large excavation range , The effect of speeding up the construction progress

Active Publication Date: 2021-07-23
中国葛洲坝集团装备工业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the complicated procedures and small construction space of the partial excavation method, the degree of mechanization of key processes such as tunnel construction excavation, initial support, and ballasting is low, the construction progress is slow, and the project cost is high. The control engineering of the whole line is required to ensure a relatively fast construction speed

Method used

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  • Integrated pre-supporting tunneling device for shield tunneling of soft stratum and tunneling method of integrated pre-supporting tunneling device
  • Integrated pre-supporting tunneling device for shield tunneling of soft stratum and tunneling method of integrated pre-supporting tunneling device
  • Integrated pre-supporting tunneling device for shield tunneling of soft stratum and tunneling method of integrated pre-supporting tunneling device

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Effect test

Embodiment 1

[0044] Such as figure 1 As shown, an integrated pre-support excavation device for shield tunneling in soft strata, including a shield body 1, an insertion portion 101 is provided at the front end of the shield body 1, and a first bracket assembly 2 is provided on the inner periphery of the shield body 1 , the first support assembly 2 is provided with several groups of movable excavating mechanisms 3 arranged along the direction of excavation, each excavating mechanism 3 is provided with an unearthed mechanism 4, and the unearthed mechanism 4 is connected to the first A bracket assembly 2 is connected and extends outwards obliquely along the opposite direction of excavation; the rear end of the shield body 1 is connected with a second bracket assembly 5, and the second bracket assembly 5 is a frame structure with an axial Connecting beams 501; the second bracket assembly 5 is provided with several guide support assemblies 6 at intervals in the circumferential direction, and the...

Embodiment 2

[0063] This embodiment provides a driving method of the driving device in the first embodiment.

[0064] A tunneling method for an integrated pre-supporting tunneling device for shield tunneling in weak strata, comprising the following steps: the shield body 1 is close to and inserted into the section of the weak stratum 11, the excavating mechanism 3 starts excavating, and the excavated soil follows the excavation process. The mechanism 4 is transported out; during the excavation process, the top pressure assembly 8 drives the grouting anchor rods 7 into the weak formation 11 on the outer periphery of the shield body 1 respectively or simultaneously, and the top pressure assembly 8 retracts , pouring mortar into the grouting anchor 7 through the grouting pipeline, the mortar fills the grouting anchor 7 and spreads around the grouting anchor 7, and the mortar is solidified and formed together with the grouting anchor 7 Form an integral support structure in weak formations (suc...

Embodiment 3

[0067] This embodiment provides a way in which the adjacent rotating shafts in the first embodiment are connected to the connecting beam.

[0068] Such as Figure 12 As shown, the rotating shafts 805 respectively connected on both sides of the same connecting beam 501 can share the same driving motor 9, and the output end of the driving motor 9 is connected to two ends of the rotating shaft through at least three bevel gears. The parts are connected to form a driving motor 9 to drive two rotating shafts 805 to rotate.

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Abstract

The invention discloses an integrated pre-supporting tunneling device for shield tunneling of a soft stratum and a tunneling method of the integrated pre-supporting tunneling device. The integrated pre-supporting tunneling device for shield tunneling of the soft stratum comprises a shield body, wherein an excavating mechanism and an unearthing mechanism are arranged in the shield body, the shield body is connected with connecting beams, guiding supporting assemblies and jacking assemblies are arranged between the connecting beams, grouting anchor rods are arranged on the guiding supporting assemblies, the jacking assemblies obliquely jack the multiple grouting anchor rods into the soft stratum within the peripheral range of the shield body, and mortar is poured into the jacked grouting anchor rods to form advance supporting and / or pre-supporting. According to the integrated pre-supporting tunneling device for shield tunneling of the soft stratum, pre-supporting work can be carried out in the excavation and excavation process, the grouting anchor rods are driven into the top layer and the surrounding soft stratum, and grouting work is completed after the space of the range where the shield body is located is excavated, and soil in the peripheral range of the shield body is reinforced, so that the excavated space has good supporting capacity and safety, and an integrated tunneling mode of simultaneously carrying out excavation, unearthing and pre-supporting is formed, and a follow-up supporting function is achieved.

Description

technical field [0001] The invention relates to the technical field of tunneling construction in weak strata, in particular to an integrated pre-support tunneling device for shield tunneling in weak stratum and a tunneling method thereof. Background technique [0002] With the development of the discipline of tunnel and underground engineering, the underground structure in our country is becoming more and more diverse and complex. Among them, solving the problem of safe and rapid construction of tunnels in weak strata is a key to the development of tunnels and underground engineering. The usual construction method is: to pre-treat the soft ground with advance pre-support, pre-reinforcement and other measures, and use the composite lining with sufficient rigidity and strength as the basic support structure for the construction method of the tunnel near the surface of the soft ground. [0003] Chinese invention patent (notification number: CN103016027B) disclosed a tunnel or ...

Claims

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Application Information

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IPC IPC(8): E21D9/06E21D9/12E21D20/00E21D20/02
CPCE21D9/06E21D9/126E21D9/12E21D20/00E21D20/021Y02E10/20
Inventor 谢宁王华熊曙许鑫黄曼君
Owner 中国葛洲坝集团装备工业有限公司
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