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Construction method of buried depth monitoring instrument poreforming and anchorage cable poreforming under unfavorable geological condition

A technology of geological conditions and construction methods, applied in drilling equipment and methods, earthwork drilling, installation of bolts, etc., can solve problems such as difficulties and poor burial depth monitoring instruments to form holes, and achieve huge economic effects.

Active Publication Date: 2011-11-16
POWERCHINA HUADONG ENG COPORATION LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is: in order to effectively solve the problem that the anchor cable and the buried depth monitoring instrument are difficult to form a hole under adverse geological conditions, the present invention provides a method for forming a hole with an anchor cable and a buried depth monitoring instrument under adverse geological conditions. The construction method aims to successfully complete the above-mentioned hole making on the excavated slope body with serious geological defects such as severe weathering, broken rock mass, and large crack opening through a simple, practical, and efficient construction method to ensure that the Timely Support and Monitoring of Deep Layers of Surrounding Rock

Method used

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  • Construction method of buried depth monitoring instrument poreforming and anchorage cable poreforming under unfavorable geological condition
  • Construction method of buried depth monitoring instrument poreforming and anchorage cable poreforming under unfavorable geological condition
  • Construction method of buried depth monitoring instrument poreforming and anchorage cable poreforming under unfavorable geological condition

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Effect test

Embodiment 1

[0017] Embodiment 1. This embodiment is suitable for forming holes in rock masses with smaller cracks.

[0018] When constructing the anchor cable hole 2 on the rock mass 1 with serious geological defects, if the drill bit is stuck and it is difficult to drill in, the drill should not be forced to drill, which will often result in a waste hole because the drill bit is completely stuck and cannot be taken out. , you should stop in time, and then carry out lining grouting for this section of the anchor cable hole. The specific steps are:

[0019] 1) Cut the flexible material, such as color striped cloth or kraft paper on the construction site, into a width of about 4 / 5 of the circumference of the hole, and then grow into a long strip 5 of the depth of the hole, and then cut the long strip One end of the plug is folded into a hat-shaped plug, which can be filled into a three-dimensional shape with paper or cement bags to keep it from collapsing after entering the hole;

[0020] ...

Embodiment 2

[0024] Embodiment 2. This embodiment is suitable for forming holes in rock masses with cracks wider than 4 cm.

[0025] In actual construction, the geological conditions of the rock mass are very poor, and the cracks are wide and deep. For example, when the cracks 2-1 of the rock mass 1 are greater than 4cm, in this case, the method of bridging and grouting at the large cracks can be adopted. Solve, so as not to cause the injected mortar to press the flexible strip into the crack due to insufficient bearing capacity (even make the entire strip fall into the crack under pressure), the specific steps are:

[0026] 1) Flexible materials, such as colored striped cloth or kraft paper at the construction site, can be cut into strips with a width greater than 20-30cm of the anchor cable hole perimeter, and then connected into long strips 5 that meet the hole depth requirements;

[0027] 2) Use the probe 4 with a 60° arc head or an inverted L-shaped probe to find out the specific posi...

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Abstract

The invention relates to a construction method of pore-forming by an anchor rope and pore-forming by deeply burying a monitoring instrument. The technical problem to be solved by the invention is that a construction method is provided so as to complete pore-forming smoothly with minimum cost on a slope body of the digging edge with serious geological defects of serious weathering, rock breaking, large fracture opening and the like. The technical proposal for solving the problem is as follows: 1) when sticking occurs and drilling ahead is difficult to carry out, color stripe cloth or a piece of kraft paper is made into a long stripe which has the same length with the depth of the pore and is provided with a bottom sub; 2) a single bamboo board is used for supporting the cap-shaped bottom sub and supporting and conveying the long stripe to the pore bottom of the anchor rope; 3) neat cement paste which is stirred uniformly is injected into the pore along the long stripe, and after solidification is carried out for 30 to 40h, i.e., the strength is over 3MPa, the cleaning bottom of the pore is carried out so as to achieve the lining effect of the pore wall; and 4) according to the pore-forming method on an undamaged rock mass, the following procedures of rope-penetrating of the anchor rope and cement grouting are completed. The invention is used for deep supporting engineering of the anchor rope of the slope of the digging edge of water conservancy and hydropower engineering, traffic, mines and the like.

Description

technical field [0001] The invention relates to a hole forming project of an anchor cable and a burial depth monitoring instrument, in particular to a construction method for forming a hole with an anchor cable and a burial depth monitoring instrument under adverse geological conditions. It is suitable for various water conservancy and hydropower projects, transportation, mines and other excavation projects for deep support of slope anchor cables and hole formation for buried depth monitoring instruments. Background technique [0002] During the construction of anchor cables, in the surrounding rock parts with extremely poor geological conditions such as rock masses with collapsing blocks and gravel soil, well-developed dislocation zones, strong relaxation of rock masses, and large crack openings, such as IV and V rock masses, drill sticking, It is very difficult to form a hole such as dropping the drill bit, and the surrounding rock must be consolidated and grouted during t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21B7/00E21D20/00
Inventor 余峰任林军李新春艾建平袁月龙
Owner POWERCHINA HUADONG ENG COPORATION LTD