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Red sandstone layer waterproof spraying anchor support method and waterproof device

A shotcrete support and water-proof technology, applied in excavation, construction, infrastructure engineering, etc., can solve the problems of bulging, cracks, and difficulty in supporting the supporting surface, so as to control settlement and deformation, ensure safety, and ensure strength. Effect

Active Publication Date: 2019-11-29
甘肃建研建设工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the above-mentioned technical problems, the present invention provides a water-proof spraying and anchoring method for the red sandstone layer, which can solve the problem that due to the characteristics of the rock and soil of the red sandstone layer, after the red sandstone is supported, the support surface is caused by the pebble layer on the top of the red sandstone layer. Water seepage often leads to problems such as difficulty in support or cracks or even bulges falling off on the support surface

Method used

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  • Red sandstone layer waterproof spraying anchor support method and waterproof device

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Effect test

Embodiment 1

[0024] Such as figure 1 As shown, a water-isolating device for a method for supporting a red sandstone layer with water-isolating spray anchors includes a plastic sheet 1, which is vertically installed on the rock wall between the supporting piles, and the plastic sheet 1 is externally fixedly installed Reinforced frame 2, steel frame 2 is externally fixedly installed with straw curtain 3, and externally fixedly installed with steel mesh 4.

[0025] A method for supporting a red sandstone layer with water-proof spraying and anchoring includes the following steps:

[0026] a. After the construction of supporting piles for the foundation pit, the soil between the piles is excavated in vertical layers and horizontal sections. The excavation height of each layer is 2m below the last supporting surface, and the length of the horizontal section is based on the site construction Speed ​​is determined;

[0027] b. After vertical layering and horizontal section excavation, excavate the exca...

Embodiment 2

[0031] Such as figure 1 As shown, a water-isolating device of a red sandstone layer water-isolating spray anchor support method includes a plastic sheet 1, which is vertically installed on the rock wall between piles of supporting piles, and the plastic sheet 1 is fixed externally The steel frame 2, the steel frame 2 is externally fixedly installed with a grass curtain 3, and the grass curtain 3 is externally fixed with a steel mesh 4.

[0032] A method for supporting a red sandstone layer with water-proof spraying and anchoring includes the following steps:

[0033] a. After the construction of supporting piles for the foundation pit, the soil between the piles is excavated in vertical layers and horizontal sections. The excavation height of each layer is 1.5m from the last support surface, and the horizontal section length is based on Confirmation of site construction speed;

[0034] b. After vertical layering and horizontal section excavation, excavate the excavation surface per...

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Abstract

The invention discloses a red sandstone layer waterproof spraying anchor support method. The red sandstone layer waterproof spraying anchor support method comprises the following steps: a, earthwork between piles is vertically layered and horizontally excavated in a sectioned mode; b, after vertical layering and horizontal sectioned excavation, the excavation face is excavated again in the direction perpendicular to a foundation pit support face, and thus pile bodies are exposed; c, a plastic cloth is fixedly arranged in a vertical pit excavated in the step b; and d, C20 fine stone concrete with the thickness being not smaller than 80 mm is sprayed on a steel bar mesh in the step c. The invention further discloses a waterproof device of the red sandstone layer waterproof spraying anchor support method. The device comprises the plastic cloth, the plastic cloth is vertically mounted on a stone body wall face between the support piles, a steel bar skeleton is fixedly mounted outside the plastic cloth, a grass curtain is fixedly mounted outside the steel bar skeleton, and the steel bar mesh is fixedly mounted outside the grass curtain. The problems that due to the characteristics of stone soil of a red sandstone layer, after red sandstone is supported, the support face is often difficult to support, or generates cracks and even bumps and then falls off due to water seepage of a cobble layer at the top of the red sandstone layer are solved.

Description

Technical field [0001] The invention relates to the technical field of supporting methods, in particular to a water-insulating spray anchor supporting method of a red sandstone layer and a water-insulating device thereof. Background technique [0002] In recent years, with the development of the national economy, the basement in the main urban area of ​​the city has shown a trend of deeper and deeper. Most of the basements of newly built residential buildings are designed with 2-3 floors. In order to ensure the safety of surrounding buildings (structures), foundation pit supports Protection is particularly important. [0003] For deep foundation pits, there are various support forms. Considering economy, safety, and applicability, deep foundation pits are mostly supported by piles and anchors. Combined with the groundwater level, "pile anchor + tube well + water collection Open row" or "occlusal pile water stop + anchor cable + tube well dewatering" comprehensive support and dewat...

Claims

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Application Information

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IPC IPC(8): E02D17/04
CPCE02D17/04
Inventor 史智伟舒蓉闫鹏程雒奇奇潘有旺路志南杨全兵
Owner 甘肃建研建设工程有限公司
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