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Excavation construction method of fully weathered sandstone high slope

A construction method and full weathering technology, applied in excavation, infrastructure engineering, waterway system, etc., can solve problems such as fast penetration of fissure water, serious erosion of slope softening, and uncertain distribution

Active Publication Date: 2021-09-14
CCCC THIRD HIGHWAY ENG
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  • Claims
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Problems solved by technology

The fully weathered sandstone layer is especially problematic, because the fully weathered sandstone layer has a lot of fissure water and no pressure, and after the fully weathered sandstone layer is excavated, the fissure water seeps quickly, has a large amount of water, and its distribution is uncertain and irregular. After exposure, the slope softens and corrodes seriously, making it difficult to excavate the foundation pit

Method used

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  • Excavation construction method of fully weathered sandstone high slope
  • Excavation construction method of fully weathered sandstone high slope
  • Excavation construction method of fully weathered sandstone high slope

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Embodiment Construction

[0031] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.

[0032] It should be noted that the experimental methods described in the following embodiments, unless otherwise specified, are conventional methods, and the reagents and materials, if not otherwise specified, can be obtained from commercial sources; in the description of the present invention, The orientation or positional relationship indicated by the term is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the referred device or element must have a specific orientation, use a specific Azimuth configuration and operation, therefore, should not be construed as limiting the invention.

[0033] Such as Figure 1~5 A...

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Abstract

The invention discloses an excavation construction method for a fully weathered sandstone high slope, comprising: step 1, digging and setting blind ditches and water collection wells, setting hollow anchor pipes, and using water pumps to draw water until the groundwater level reaches a preset construction elevation; step 2, Longitudinal segmental construction, two sets of inner and outer high-pressure jet grouting piles are installed in each section of the foundation pit, and concrete crown beams are set on the top of the high-pressure jet grouting piles. Step 3: Excavate the earthwork until the construction depth of this section of the foundation pit; Step 4: Set the first steel-concrete layer, waterproofing agent layer, and rubber layer along the side wall of the foundation pit; Step 5: According to the plan Set the slope angle, set the rubber asphalt layer and the second steel-concrete layer; and pre-bury multiple hollow anchor pipes; step 6, repeat steps 1 to 5 until the depth of the foundation pit reaches the preset elevation. The invention has the beneficial effects of making the water-stopping effect prominent and the support safe and reliable during the foundation pit excavation process of the whole sandstone layer.

Description

technical field [0001] The invention relates to the technical field of deep foundation pit construction. More specifically, the invention relates to an excavation construction method for a fully weathered sandstone high slope. Background technique [0002] With the rapid development of the construction industry, the excavation depth of foundation pits is getting deeper and deeper, and the geological conditions are becoming more and more complex. Therefore, there are various construction problems in the excavation of deep foundation pits under various geological environments. The fully weathered sandstone layer is especially problematic, because the fully weathered sandstone layer has a lot of fissure water and no pressure, and after the fully weathered sandstone layer is excavated, the fissure water seeps quickly, has a large amount of water, and its distribution is uncertain and irregular. After exposure, the slope softens and corrodes seriously, making it difficult to exc...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/02E02D17/04E02D5/46E02D31/02E02D19/06E03F5/10
CPCE02D5/46E02D17/02E02D17/04E02D19/06E02D31/02E03F5/10
Inventor 王珏黄险峰刘华江朱秀玲丁杰
Owner CCCC THIRD HIGHWAY ENG
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