CN110453693B

CN110453693B - Side slope processing scheme adopting flat hole type anchor pair

Info

Publication number: CN110453693B
Application number: CN201910157776.7A
Authority: CN
Inventors: 潘建波; 何鹏; 谢琰; 薛博文; 郭颍奎
Original assignee: North China University of Water Resources and Electric Power
Current assignee: North China University of Water Resources and Electric Power
Priority date: 2019-03-02
Filing date: 2019-03-02
Publication date: 2021-06-11
Anticipated expiration: 2039-03-02
Also published as: CN110453693A

Abstract

The invention discloses a side slope treatment scheme adopting a flat hole type anchor, comprising the following steps: step 1: survey the slope geology to be reinforced, formulate a treatment scheme, and draw engineering drawings; step 2: in the slope Drill a specified number of anchoring holes into the slope at the designated positions on both sides, and mark the positions of the anchoring holes on the slope surface of the slope and inside the anchoring holes by the theodolite; Step 3: Use a drilling machine to drill the anchoring holes on the slope, Pass the anchor cable through the anchoring hole, fix one end of the anchor cable exposed on the slope surface on the slope surface with the outer anchoring head, and fix the anchor cable end in the anchoring hole with the inner anchoring head; Step 4: Use steel bars to connect the outer anchoring heads to each other Fix, connect the inner anchoring head with steel bars; Step 5: Set up drainage holes equidistantly from the vertical anchoring hole to the top of the anchoring hole. In a word, the present invention has the advantages of perfect scheme, convenient construction and high safety.

Description

Side slope processing scheme adopting flat hole type anchor pair

Technical Field

The invention relates to the technical field of geotechnical engineering, in particular to a side slope processing scheme for anchoring by adopting a flat hole type.

Background

The anchor cable is characterized in that when the main cable is anchored in a side hole in a suspension bridge, the main cable is divided into a plurality of steel bundles which are respectively anchored in an anchor ingot, and the steel bundles are called as the anchor cables. The anchor cable is a prestressed steel strand which is fixed on the slope surface through the outer end and passes through the sliding surface of the side slope in a stable rock body with the other end anchored in the sliding surface, so that the anti-sliding resistance is directly generated on the sliding surface, the anti-sliding friction resistance is increased, the structural surface is in a compact state, and the integrity of the rock body of the side slope is improved, thereby fundamentally improving the mechanical property of the rock body, effectively controlling the displacement of the rock body, promoting the stability of the rock body, and achieving the purpose of renovating bedding, sliding slopes, dangerous rocks and dangerous rocks.

However, the anchor cable often fails due to loose damage of surrounding rock at the anchoring end, aging of anchoring agent, gradual damage of stress concentration at the anchoring end, creep relaxation of the anchor cable and the like, and further causes the problem of side slope. In order to avoid the above problems, the present new pressure dispersion type anchor cable, pressure type anchor cable, etc. are aimed at ensuring the reliability and effectiveness of the anchoring end.

Disclosure of Invention

Aiming at the existing problems, the invention provides a slope treatment scheme for an anchor by adopting a flat hole type.

The technical scheme of the invention is as follows: a slope treatment scheme adopting a flat hole type anchor pair comprises the following steps:

the method comprises the following steps: slope geological survey

Surveying the slope geology needing to be reinforced, making a processing scheme according to the slope geology parameters, and drawing an engineering drawing;

step two: making anchoring holes

According to the engineering drawing, punching a specified number of anchoring holes in the slope at specified positions on two sides of the slope, and marking the positions of the anchoring holes on the slope surface of the slope and inside the anchoring holes by using a theodolite according to the positions of the anchoring holes on the engineering drawing;

step three: anchor hole and opposite-penetrating anchor cable

Drilling anchoring holes at the mark positions of the slope anchoring holes to mark positions in the anchoring holes with the same mark number by using a drilling machine, penetrating anchor cables in the anchoring holes after penetrating, fixing one end of each anchor cable exposed out of the slope on the slope by using an outer anchoring head, fixing the end of each anchor cable in each anchoring hole by using an inner anchoring head, applying certain tension to two ends of each anchor cable, and then sealing the outer anchoring head and the inner anchoring head;

step four: steel bar connection

Connecting and fixing outer anchoring heads arranged on the slope surface of the side slope by using reinforcing steel bars, and connecting inner anchoring heads in the same anchoring hole by using reinforcing steel bars;

step five: perforated drain hole

Three drain holes are drilled at equal intervals from the top of the vertical anchoring hole to the upper part of the anchoring hole.

Further, the processing scheme comprises the area of the slope to be reinforced, the number and the positions of the anchoring holes and the number and the positions of the anchoring holes.

Furthermore, in the second step, the mutually connected anchoring holes are marked with the same number, and the anchoring holes are formed by punching the anchoring hole marks with the same number, so that the number is convenient for construction identification.

Furthermore, in the third step, after the two ends of the anchor cable are sealed, quick-setting cement mortar is poured into the anchoring hole, and the quick-setting cement mortar is poured to avoid collapse of the anchoring hole due to water leakage in the anchoring hole.

Furthermore, the connection mode of connecting the outer anchoring heads by the steel bars in the fourth step is cross grid connection, and the cross grid connection is more stable.

Furthermore, the bottom surface of the anchoring hole is in a slope shape with two low sides and a high middle part, so that water in the anchoring hole can be conveniently discharged.

Furthermore, the bottom ends of the drain holes are provided with blocking nets, the blocking nets can block sundries falling off from the drain holes, and collapse caused by the fact that the drain holes fall off in a large quantity is avoided.

The invention has the beneficial effects that: compared with the prior art, the side slope processing scheme of the anchor in the flat hole type is characterized in that the side slope geology needing to be reinforced is surveyed, the processing scheme is formulated according to specific geological conditions, then anchor holes are drilled on two sides of the side slope, the anchor holes which are connected with each other are marked with the same number, the anchor holes with the same number are drilled through, so that the anchor holes are formed, quick setting cement paste is poured into the anchor holes after two ends of the anchor cable are sealed, the quick setting cement paste is poured to avoid collapse of the anchor holes due to water leakage in the anchor holes, outer anchor heads arranged on the slope surface of the side slope are connected and fixed in a cross grid mode through reinforcing steel bars, drain holes are drilled vertically upwards in the anchor holes, and meanwhile, the bottom surface of the anchor holes is in a slope shape with two low sides and a high middle, so that water in the anchor holes can be. In a word, the invention has the advantages of perfect scheme, convenient construction, high safety and the like.

Drawings

Fig. 1 is a sectional view of a slope of the present invention.

Wherein, 1-slope, 2-anchoring hole, 3-anchoring hole, 4-anchor cable, 5-outer anchoring head, 6-inner anchoring head, 7-reinforcing steel bar and 8-drainage hole.

Detailed Description

For the convenience of understanding the technical solution of the present invention, the following description is made with reference to fig. 1 and the specific embodiments, which are not intended to limit the scope of the present invention.

A slope treatment scheme for an anchor by adopting a flat hole type mainly comprises the following steps:

the method comprises the following steps: slope 1 geological survey

Surveying the geology of the side slope 1 needing to be reinforced, formulating a processing scheme through the geological parameters of the side slope, wherein the processing scheme comprises the area of the side slope 1 needing to be reinforced, the number and the positions of the anchoring holes 2 and the number and the positions of the anchoring holes 3, and drawing an engineering drawing;

step two: making anchoring holes

As shown in fig. 1, according to engineering drawings, a specified number of anchoring holes 2 are arranged in the side slope 1 at specified positions on two sides of the side slope 1, the bottom surface of each anchoring hole 2 is in a slope shape with two low sides and a high middle part, and the positions of the anchoring holes 3 are marked on the slope surface of the side slope 1 and inside the anchoring holes 2 by theodolites according to the positions of the anchoring holes 3 on the engineering drawings, so that the mutually connected anchoring holes 3 are marked with the same number;

step three: drilling anchoring holes 3 and penetrating anchor cables 4

Drilling an anchoring hole 3 at a marking position of a slope surface anchoring hole 3 to a marking position in an anchoring hole 2 with the same mark number by using a drilling machine, penetrating an anchor rope 4 in the anchoring hole 3 after penetrating, fixing one end of the anchor rope 4 exposed out of the slope surface on the slope surface by using an outer anchoring head 5, fixing the end of the anchor rope 4 in the anchoring hole 2 by using an inner anchoring head 6, applying a certain pulling force to two ends of the anchor rope 4, then blocking the outer anchoring head 5 and the inner anchoring head 6, and pouring quick-setting cement slurry into the anchoring hole 3;

step four: connection of steel bars 7

The external anchoring heads 5 arranged on the slope surface of the side slope 1 are mutually connected and fixed by using reinforcing steel bars 7, the connection mode is cross grid connection, and the internal anchoring heads 6 in the same anchoring hole 2 are connected by using the reinforcing steel bars 7;

step five: perforated with drain holes 8

Three drain holes 8 are arranged at equal intervals from the top of the vertical anchoring hole 2 to the upper part of the anchoring hole 2.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. a kind of side slope treatment scheme adopting flat hole type pair anchor, is characterized in that, mainly comprises the following steps:

Step 1: Slope (1) Geological Survey

(1) Geological survey of the slope that needs to be reinforced, formulate a treatment plan based on the slope geological parameters, and draw engineering drawings;

Step 2: Make an anchoring hole

According to the engineering drawings, a specified number of anchor holes (2) are drilled into the side slope (1) at the specified positions on both sides of the side slope (1). ) Mark the position of the anchoring hole (3) on the slope and inside the anchoring hole (2);

Step 3: Drill anchor holes (3) and thread the anchor cables (4)

Use a drilling machine to drill the anchor hole (3) at the marked position of the anchor hole (3) on the slope surface to the marked position of the anchor hole (2) with the same number, and then thread the anchor cable (4) into the anchor hole (3) after drilling. ), fix one end of the anchor cable (4) exposed on the slope surface on the slope surface with the outer anchoring head (5), fix the end of the anchor cable (4) in the anchoring hole (2) with the inner anchoring head (6), A certain tension is applied to both ends of the anchor cable (4), and then the outer anchoring head (5) and the inner anchoring head (6) are blocked;

Step 4: Rebar (7) Connection

The outer anchoring heads (5) set on the slope surface of the side slope (1) are connected and fixed to each other by using the reinforcing bars (7), and the inner anchoring heads (6) in the same anchoring hole (2) are connected with the reinforcing bars (7);

Step 5: Make drainage holes (8)

The top of the vertical anchoring hole (2) is equidistantly drilled with three drainage holes (8) above the anchoring hole (2);

The treatment plan includes the area of the side slope (1) to be reinforced, the number and position of the anchor holes (2), and the number and position of the anchor holes (3);

In the described step 2, the interconnected anchor holes (3) are marked with the same numerical number;

In the step 3, the two ends of the anchor cable (4) are blocked and the quick-setting cement slurry is poured into the anchoring hole (3);

In the step 4, the connection mode of connecting the outer anchoring head (5) with the reinforcing bar (7) is a cross-grid connection;

The bottom surface of the anchoring hole (2) is in the shape of a slope with low sides and a high middle;

The bottom ends of the drainage holes (8) are provided with barrier nets, and the barrier nets can block the sundries falling off in the drainage holes (8), so as to prevent the drainage holes (8) from falling off and causing collapse.