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Settlement slowing structure for soft soil foundation shield tunnel and using method

A technology for shield tunneling and soft soil foundation, applied in tunnels, tunnel linings, earthwork drilling and mining, etc., can solve problems such as water leakage and continuous settlement of segments, and achieve the effect of increasing the effect

Inactive Publication Date: 2021-03-26
重庆贻晨兴工业设计有限责任公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] Aiming at the above-mentioned deficiencies in the prior art, the present invention provides a settlement slowing structure for shield tunnels on soft soil foundations, which is used to solve the problems caused by grouting and mortar spraying in the existing tunnel anti-settling structures during construction. Inhomogeneity will generate excess pore water pressure in the formation, and the formation will subside as the excess pore water pressure dissipates. Insufficient grouting will cause water leakage from the segment, which will cause continuous settlement after construction

Method used

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  • Settlement slowing structure for soft soil foundation shield tunnel and using method
  • Settlement slowing structure for soft soil foundation shield tunnel and using method
  • Settlement slowing structure for soft soil foundation shield tunnel and using method

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Effect test

Embodiment 1

[0040] Such as Figure 1-6 As shown, a settlement slowing structure for shield tunnels on soft soil foundations of the present invention includes a mortar spraying mechanism 1, shield tunnel segments 2, grouting connection parts 3, grouting pipes 4, grouting equipment 5 and The power unit 7, the front part of the mortar spraying mechanism 1 penetrates the shield tunnel segment 2 and extends into the soft soil 6, the tail of the mortar spraying mechanism 1 is rotationally connected with the power unit 7, and the grouting connection part 3 is opened on the power unit 7 On the outside, the grout connection part 3 communicates with the mortar spraying mechanism 1 , and the grouting connection part 3 is connected with the grouting equipment 5 through the grouting pipe 4 . Due to the effect of grouting in the construction of the tunnel anti-settlement structure in the prior art, the uneven spraying of mortar will generate excess pore water pressure in the formation, and the formatio...

Embodiment 2

[0045] Such as Figure 1-6 As shown, a settlement slowing structure for shield tunnels on soft soil foundations of the present invention includes a mortar spraying mechanism 1, shield tunnel segments 2, grouting connection parts 3, grouting pipes 4, grouting equipment 5 and The power unit 7, the front part of the mortar spraying mechanism 1 penetrates the shield tunnel segment 2 and extends into the soft soil 6, the tail of the mortar spraying mechanism 1 is rotationally connected with the power unit 7, and the grouting connection part 3 is opened on the power unit 7 On the outside, the grout connection part 3 communicates with the mortar spraying mechanism 1 , and the grouting connection part 3 is connected with the grouting equipment 5 through the grouting pipe 4 . Due to the effect of grouting in the construction of the tunnel anti-settlement structure in the prior art, the uneven spraying of mortar will generate excess pore water pressure in the formation, and the formatio...

Embodiment 3

[0053] Such as Figure 1-6 As shown, a settlement slowing structure for shield tunnels on soft soil foundations of the present invention includes a mortar spraying mechanism 1, shield tunnel segments 2, grouting connection parts 3, grouting pipes 4, grouting equipment 5 and The power unit 7, the front part of the mortar spraying mechanism 1 penetrates the shield tunnel segment 2 and extends into the soft soil 6, the tail of the mortar spraying mechanism 1 is rotationally connected with the power unit 7, and the grouting connection part 3 is opened on the power unit 7 On the outside, the grout connection part 3 communicates with the mortar spraying mechanism 1 , and the grouting connection part 3 is connected with the grouting equipment 5 through the grouting pipe 4 . Due to the effect of grouting in the construction of the tunnel anti-settlement structure in the prior art, the uneven spraying of mortar will generate excess pore water pressure in the formation, and the formatio...

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Abstract

The invention belongs to the technical field of tunnel construction, and particularly relates to a settlement slowing structure for a soft soil foundation shield tunnel. The settlement slowing structure comprises a mortar spraying mechanism, a shield tunnel segment, a grouting connecting part, a grouting pipe, grouting equipment and a power unit. The front part of the mortar spraying mechanism penetrates into the shield tunnel segment and extends into soft soil. The tail part of the mortar spraying mechanism is rotatably connected with the power unit, the grouting connecting part is arranged on the outer side of the power unit, the grouting connecting part communicates with the mortar spraying mechanism, and the grouting connecting part is connected with grouting equipment through the grouting pipe. The problems that the segment leaks water and continuous settlement exists after construction due to the fact that in an existing tunnel anti-settlement structure construction, under the action of grouting, excessive pore water pressure can be generated in a stratum due to uneven mortar spraying, settlement can be generated in the stratum along with dissipation of the excess pore waterpressure, and grouting is insufficient are solved.

Description

technical field [0001] The invention belongs to the technical field of tunnel construction, in particular to a settlement slowing structure for shield tunnels on soft soil foundations and a use method thereof. Background technique [0002] In recent years, with the rapid development of China's economy and the acceleration of urbanization, the subway has become an effective means to relieve the huge traffic pressure in the city. In urban underground tunnel engineering, shield method construction is a relatively mature and widely used construction technology at present. Compared with the traditional tunnel construction method, the shield tunneling method can effectively control the surface settlement, and the construction speed is fast, so it has become the first choice for urban underground tunnel engineering. Especially for cities located in soft soil areas, the shield method is the only feasible long tunnel construction method at this stage. The geological conditions in s...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21D9/06
CPCE21D9/0607E21D11/105
Inventor 张琼方娄亚东何绍衡
Owner 重庆贻晨兴工业设计有限责任公司
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