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Double-lining shield tunnel and construction method thereof

A shield tunneling and lining technology, applied in tunnels, shaft linings, tunnel linings, etc., can solve the problems of easy damage at joints, corrosion of lining segment bolts, low bearing capacity and rigidity at joints, etc., to improve safety performance, The effect of improving the anti-seepage performance and improving the bearing capacity

Inactive Publication Date: 2018-12-18
HOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Water leakage will not only affect the safety and durability of the tunnel structure, but also cause hazards such as uneven settlement and deformation of the tunnel
Especially in shield tunnels in soft ground and rich groundwater areas, the lining segments and bolts are severely corroded, resulting in a decrease in the bearing capacity of the tunnel
[0004] Shield tunnels use shield segment assembly as the permanent support lining structure. Since the segment assembly is connected by bolts, the bearing capacity and stiffness of the joints are small, and sudden stress changes often occur, resulting in easy damage to the joints
There is often a discontinuity in the overall stiffness of the shield segment, and the danger of leakage at the joints, resulting in water seepage in the tunnel

Method used

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  • Double-lining shield tunnel and construction method thereof
  • Double-lining shield tunnel and construction method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0025] Such as figure 1 As shown, a double-lined shield tunnel includes an outer lining 1, an inner lining 4, and a high polymer anti-seepage filler 3. The outer lining 1 is made of prefabricated segments connected by bolts, and the prefabricated segments are made of reinforced concrete. become.

[0026] Such as figure 2 As shown, the inner lining 4 is formed by inserting prefabricated pipe sections 8 to form a sequentially connected ring structure. The prefabricated pipe sections 8 are made of reinforced concrete; the prefabricated pipe sections 8 include a base part 5 and a left end 6, The right end 7; the overall length of the prefabricated pipe section 8 is 2-4m, and the ring thickness of the base part 5 is 15-20cm. Change, the inner radius of the right end 7 increases, the outer radius remains unchanged, the length of the left end 6 and the right end 7 is 20-30cm, the value of the reduced value of the outer radius and the increased value of the inner radius are 1 / 2 of ...

Embodiment 2

[0029] The construction method of the double lining shield tunnel provided by the present invention is as follows:

[0030] The first step: site planning, construction of temporary facilities and temporary facilities, and allocation of human resources;

[0031] The second step: shield machine selection and entry;

[0032] The third step: shield tunneling construction;

[0033] The fourth step: processing of prefabricated segment and prefabricated pipe section 8;

[0034] Step 5: Assembling the prefabricated segments into the outer lining 1, and injecting the back of the outer lining 1;

[0035] Step 6: Insert the prefabricated pipe section 8 into the inner lining 4, and reserve a hole 2 above the top of the inner lining 4;

[0036] Step 7: Inject high polymer anti-seepage filler 3 into the reserved hole 2 to form a double-lined shield tunnel;

[0037] Step 8: Measure and monitor during construction, measure and report to monitor in time.

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Abstract

The invention discloses a double-lining shield tunnel and a construction method thereof. The double-lining shield tunnel comprises an outer lining, an inner lining and high-polymer impermeable padding, wherein the outer lining is formed by splicing precast segments, the inner lining is composed of precast segments through inserted connection, the two end of each precast segment are matched inserted connection structure, the ends of the adjacent precast segments are in matched insertion connection to form annular structures connected in sequence, and the high-polymer impermeable padding are grouted to the portion between the inner lining and the outer lining through a reserved hole. The double-lining shield tunnel and the construction method thereof have the advantages that the anti-seepageperformance of the shield tunnel can be effectively enhanced, the safety of the shield tunnel is increased, and the bearing capacity of the shield tunnel is improved; the high-polymer impermeable padding has the characteristics of viscoelasticity and high damping to achieve the functions of shock absorption and energy dissipation; the integral rigidity of the inner lining is large, and the non-deformability is strong; and particularly the effect on river crossing shield tunnels, sea crossing shield tunnels and ultra-deep shield tunnels is obvious.

Description

technical field [0001] The invention belongs to the technical field of shield tunnels, in particular to a double-lined shield tunnel with excellent waterproof performance and a construction method. Background technique [0002] In recent years, my country's economy and society have continued to develop, subway construction, large-scale river-crossing tunnels, and cross-sea tunnels have flourished, and shield tunneling methods have been widely used. Lining structure cracks and water leakage are typical structural hazards of shield tunnels. The concrete structure is in a state of cracks during use, and the cracks in the segment will affect the safety and durability of the tunnel structure, and will also affect the use of the tunnel and the safety of other facilities. [0003] Shield tunnels are constantly plagued by water leakage hazards. Water leakage will not only affect the safety and durability of the tunnel structure, but also cause hazards such as uneven settlement and...

Claims

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Application Information

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IPC IPC(8): E21D11/08E21D11/38
CPCE21D11/08E21D11/083E21D11/38
Inventor 李平王新浪吕亚茹马杰胡胜良
Owner HOHAI UNIV