Construction method of underground continuous walls in tunnel
A construction method and diaphragm wall technology, applied in sheet pile walls, foundation structure engineering, construction, etc., can solve problems such as abnormal construction, adverse effects on the stability of tunnel structures, and limited tunnel construction space, and achieve convenient construction and simple structure , flexible operation
Active Publication Date: 2019-05-03
BCEG CIVIL ENG
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Problems solved by technology
[0003] The purpose of the present invention is to provide a construction method for the underground diaphragm wall in the tunnel, to solve the technical problem that the traditional construction method cannot be constructed due to the limitation of the construction space in the tunnel and the adverse effect on the stability of the tunnel structure.
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[0044] The construction method of the underground diaphragm wall in the tunnel includes the following steps.
[0045] Step 1: Construction of the guide wall; the construction process of the guide wall in the tunnel is: installation of the upper support of the tunnel → measuring and setting out → breaking the initial support structure at the bottom of the tunnel → digging trenches → binding the steel bars of the guide wall → setting up the formwork → pouring the concrete of the guide wall →Remove the formwork and install cross braces; during the construction of the guide wall in the tunnel, manual excavation is used to construct the guide wall due to the limited underground working space. The stability will be affected to a certain extent. I22a I-beam or Φ36 lead screw is used to support the upper part of the tunnel.
[0046] Step 2: Grooving: A small hydraulic grooving machine is used for grooving. A drill bit is installed in the center of the mechanical grab to increase the d...
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Abstract
The invention discloses a construction method of underground continuous walls in a tunnel. The construction method comprises the following steps that 1, guide wall construction is performed; 2, grooving is performed; 3, continuous walls to be constructed are subjected to section dividing, and a plurality of continuous wall sections to be constructed are formed; 4, the first batch of steel bar frameworks are constructed in grooves; 5, wall brushing machines are used for cleaning and brushing I-steel walls of the underground continuous walls; 6, bottom cleaning and slurry changing are performed;7, the second batch of steel bar frameworks are constructed in the grooves; 8, lock latch pipes and guiding pipes are installed; 9, the second time of groove cleaning is performed; 10,underwater concrete is poured; and 11, the lock latch pipes are pulled out and removed. The construction method solves the technical problem that the normal construction cannot be performed due to the facts that a conventional construction method is limited by the construction space in the tunnel during construction and the stability of the tunnel structure is adversely affected.
Description
technical field [0001] The invention relates to a construction method of an underground continuous wall in a tunnel. Background technique [0002] During the construction of the traditional subway underground excavation method, when the groundwater level is above the floor structure, the excavation and earthwork are generally completed by setting up a dewatering well for pumping and drainage to reduce the water level and adding a curtain to stop the water. Conventional water-stopping measures include deep-hole grouting, rotary grouting piles, occlusal piles, and underground diaphragm walls. However, the first three water-stopping measures have limitations, and the water-stopping effect is difficult to guarantee. Therefore, underground diaphragm walls have become the first choice for underground engineering water-stopping. an option. At present, the construction of the underground diaphragm wall is usually carried out on the ground, and the site range is large. In order to a...
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Login to View More IPC IPC(8): E02D19/18E02D5/18E02D15/06
Inventor 薛洪松段学锋杜昌隆刘希胜母贤辉孙雨晴冯宝家石广阔王杨
Owner BCEG CIVIL ENG