Seamless tunnel structure adopting ECC concrete post-cast strips and construction method of seamless tunnel structure

A technology of tunnel structure and post-casting zone, applied in tunnels, tunnel linings, earthwork drilling, etc., can solve the problems of easy cracking of the secondary lining of the tunnel, easy cracking and corrosion of the water stop belt, etc., so as to solve the problem of water leakage. , to avoid cracking, to avoid the effect of large cracks

Active Publication Date: 2018-11-30
KUNMING UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003] The technical problem to be solved by the present invention is: the present invention provides a seamless tunnel structure using ECC concrete post-casting belt and its construction method. Corro

Method used

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  • Seamless tunnel structure adopting ECC concrete post-cast strips and construction method of seamless tunnel structure
  • Seamless tunnel structure adopting ECC concrete post-cast strips and construction method of seamless tunnel structure
  • Seamless tunnel structure adopting ECC concrete post-cast strips and construction method of seamless tunnel structure

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Experimental program
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Embodiment 1

[0038] Embodiment 1: as Figure 1-9As shown, the seamless tunnel structure using the ECC concrete post-cast belt includes the secondary lining poured in stages in advance, the post-cast belt 3, the circumferential blind ditch 5, the post-cast belt reinforcement 6, the pre-cast secondary lining concrete Reinforcement 7, connecting main reinforcement 8, ECC concrete 9; when performing the secondary lining 1 of the previous section and the secondary lining 2 of the subsequent section, the concrete poured in advance shall be reinforced according to the design requirements, and at the same time, pre-poured The connecting main reinforcement 8 is reserved, and the density of the reserved connecting main reinforcement 8 is lower than that of the secondary lining concrete reinforcement 7 poured in advance; after the final setting of the secondary lining in the front and rear sections of the previous segmental pouring is completed, the ECC concrete and ordinary concrete The interface 4 ...

Embodiment 2

[0052] Embodiment 2: as Figure 1-9 As shown, the seamless tunnel structure and its construction method using ECC concrete post-casting belt, this embodiment is the same as embodiment 1, wherein,

[0053] Further, the sub-section length of the former secondary lining 1 and the rear secondary lining 2 is 8m, and the post-casting tape 3 is reserved between two adjacent secondary linings, and the width of the post-casting tape 3 is 80cm.

Embodiment 3

[0054] Embodiment 3: as Figure 1-9 As shown, the seamless tunnel structure and its construction method using ECC concrete post-casting belt, this embodiment is the same as embodiment 1, wherein,

[0055] Further, the sub-section length of the former secondary lining 1 and the rear secondary lining 2 is 6m, and the post-casting tape 3 is reserved between two adjacent secondary linings, and the width of the post-casting tape 3 is 60cm.

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Abstract

The invention relates to a seamless tunnel structure adopting ECC concrete post-cast strips and a construction method of the seamless tunnel structure, and belongs to the technical field of tunnel construction. Tunnel secondary linings are constructed in a segmented mode, and one post-cast strip is reserved between every two segments of secondary linings. The temperature stress and concrete shrinkage stress of secondary lining concrete cast in advance are reduced through the post-cast strips, reinforcing bars are reduced in the post-cast strips, deformation is induced to be generated on the post-cast strips, ECC concrete is used for casting the post-cast strips, concrete cracks generated by differential settlement and loads are reduced through the ultrahigh toughness and self-healing capacity of the ECC concrete, and the super-long seamless tunnel structure is achieved. The ECC concrete is adopted for casting the post-cast strips, the width of the concrete can be effectively controlled, cracks generate din the tunnel operation process are avoided, and then the cracking and water leakage problem of a tunnel is fundamentally solved.

Description

technical field [0001] The invention relates to a seamless tunnel structure using an ECC concrete post-cast belt and a construction method thereof, belonging to the technical field of tunnel construction. Background technique [0002] Water seepage is one of the most common diseases of highway tunnel engineering. The saying "ten tunnels and nine leaks" is widely circulated in the engineering field, which is called a major chronic disease of tunnel engineering. The waterproof and drainage work of highway tunnels is a systematic work, and the construction joints, deformation joints, and settlement joints of the tunnel are the weak parts of the tunnel waterproofing. Generally, measures such as ring waterstops are used to waterproof the joints; however, , due to poor water seepage drainage, lax joints of waterstops, and lack of compactness around the waterstop-expanded rubber strip, etc., it is easy to cause groundwater leakage at construction joints, deformation joints, and set...

Claims

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Application Information

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IPC IPC(8): E21D11/10E21D11/38E21F16/02
CPCE21D11/10E21D11/102E21D11/107E21D11/38E21F16/02Y02A30/30
Inventor 谢洪涛
Owner KUNMING UNIV OF SCI & TECH
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