Construction method for treating tunnel portal landslide by steel pipe piles and crown beams
A construction method and technology of steel pipe piles, which are used in tunnels, tunnel linings, earth-moving drilling and mining, etc., can solve the problems of high construction cost, high risk factor of manual construction, and inaccessibility of large-scale mechanized construction equipment.
Inactive Publication Date: 2019-06-18
CHINA RAILWAY 12TH BUREAU GRP +1
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Problems solved by technology
[0004] The purpose of the present invention is to provide a steel pipe pile and a crown beam for treating landslides at tunnel entrances in order to solve the problems in the prior art that large-scale mechanized construction equipment cannot reach them, the risk factor of manual construction is high, and the construction cost is high. In order to improve the construction safety factor and reduce the construction cost when dealing with the tunnel entrance landslide
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[0029] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0030] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.
[0031] In the present invention, unless stated to the contrary, the used orientation words such as "up, down, top, bottom" generally refer to the directions shown in the drawings or refer to the vertical, perpendicular or gravitational directions The terms used to describe the mutual positional relationship of the various components mentioned above.
[0032] The present invention will be described in detail below with reference to the accompanying drawings and examples.
[0033] The embodime...
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The invention provides a construction method for treating tunnel portal landslide by steel pipe piles and crown beams. The construction method for treating the tunnel portal landslide by the steel pipe piles and the crown beams comprises the following steps that (S1) construction areas where the steel pipe piles are applied to two sides of a pre-excavated portal are leveled; (S2) a plurality of rows of construction lines parallel to the center line of a pre-excavated tunnel are determined in each construction area, and a plurality of pipe pile marks are arranged on each row of construction lines according to a first given spacing; (S3) the steel pipe piles are applied to each pipe pile mark; (S4) a crown beam foundation pit and a plurality of vertical foundation pits are excavated; (S5) acrown beam reinforcement framework is constructed in the crown beam foundation pit, and a vertical connecting beam reinforcement framework is constructed in each vertical foundation pit; (S6) a crownbeam template is applied to the crown beam reinforcement framework to form a crown beam casting cavity, and connecting beam templates are applied to the vertical connecting beam reinforcement frameworks to form a connecting beam casting cavity; and (S7) concrete is poured into the crown beam pouring cavity and the connecting beam pouring cavity, and the crown beam template and the connecting beamtemplates are removed after the poured concrete is solidified. According to the construction method for treating the tunnel portal landslide by the steel pipe piles and the crown beams, the construction safety factor can be improved and the construction cost can be reduced when the tunnel portal landslide is treated.
Description
technical field [0001] The invention relates to the field of tunnel construction, in particular to a construction method for treating tunnel entrance landslides with steel pipe piles and crown beams. Background technique [0002] With the rapid development of my country's infrastructure construction, traffic roads have become an important project of infrastructure construction. In some road construction sections with high technical indicators, it is necessary to overcome the influence of topography, especially in mountainous areas, and tunnel construction has become an important project of road construction. Affected by engineering geological conditions, hydrogeological conditions, and human factors, the safety of the tunnel entrance is a prerequisite for the smooth progress of the tunnel's internal construction. The tunnel entrance is a shallow buried section, and the surface is mostly Quaternary residual slope deposits. Clay and gravel soil, the underlying bedrock is main...
Claims
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IPC IPC(8): E21D9/14E21D11/10E21D11/14E21D11/28
Inventor 李博肖三民寇志鹏曹万敏沙学良
Owner CHINA RAILWAY 12TH BUREAU GRP