CN111893996A

CN111893996A - Anchor cable pier construction method

Info

Publication number: CN111893996A
Application number: CN202010830812.4A
Authority: CN
Inventors: 张建华; 杨东; 郑立宁; 王亨林; 杨国权; 冯世清; 黄练红; 丁林; 杨超; 赵杰; 刘攀; 杨海鹏; 胡春雨; 雷永强
Original assignee: China Southwest Architectural Design and Research Institute Co Ltd
Current assignee: China Southwest Architectural Design and Research Institute Co Ltd
Priority date: 2020-08-18
Filing date: 2020-08-18
Publication date: 2020-11-06

Abstract

The invention belongs to the technical field of building construction, and discloses an anchor cable pier construction method, which comprises the following steps: a, drilling an anchor cable according to structural arrangement and reinforcement design requirements, mounting the anchor cable, and then drilling and grouting; step B, finishing the reinforcement binding of the waist beam or the column, and welding a steel backing plate on the waist beam or the column; c, pouring concrete of the waist beam or the column, and covering the steel base plate under the concrete; and D, chiseling the concrete covered on the steel backing plate, installing an anchorage device, and tensioning and sealing the anchor cable. The construction method has the advantages that the occupied space of the engineering structure is small, the construction cost is reduced, and the construction efficiency is improved.

Description

Anchor cable pier construction method

Technical Field

The invention relates to the technical field of building construction, in particular to an anchor cable pier construction method.

Background

At present, grouted rubbles and cast-in-place reinforced concrete lattices are mainly adopted in slope engineering reinforcement treatment in China, which is far behind developed Japan in the building industry and developed countries in Europe and America, and due to the small anti-sliding resistance provided by the grouted rubbles, the grouted rubbles are generally suitable for anti-scouring treatment of small-scale low and gentle slopes; the cast-in-place reinforced concrete lattice can provide larger anti-sliding resistance, has better integrity and can well cooperate with the prestressed anchor cable to bear force, so the cast-in-place reinforced concrete lattice is widely applied to the slope reinforcement of various types of slopes with different heights in China, and is particularly widely applied to the reinforcement treatment of cutting slopes mainly excavated and embankment slopes mainly filled.

The cast-in-place reinforced concrete lattice is mostly provided with anchor cable piers, the anchor cables are fixed on the pier surface through the outer ends, the other ends are anchored in the stable rock body and penetrate through the prestressed steel strands of the side slope sliding surface, the anti-sliding resistance is directly generated on the sliding surface, the anti-sliding friction resistance is increased, the structural surface is in a compression state, and the integrity of the side slope rock body is improved, so that the mechanical property of the rock body is fundamentally improved, the displacement of the rock body is effectively controlled, the rock body is made to be stable, and the purposes of regulating bedding, sliding, dangerous rocks and dangerous rocks are achieved. However, conventional anchor pier can increase the overall cost of the project and take up additional floor space.

Disclosure of Invention

The invention aims to provide a construction method of an anchor cable pier, and aims to solve the problem that the existing anchor cable pier is high in manufacturing cost.

In order to achieve the purpose, the invention provides the following technical scheme: an anchor rope pier construction method comprises the following steps:

a, drilling an anchor cable according to structural arrangement and reinforcement design requirements, mounting the anchor cable, and then drilling and grouting;

step B, finishing the reinforcement binding of the waist beam or the column, and welding a steel backing plate on the waist beam or the column;

c, pouring concrete of the waist beam or the column, and covering the steel base plate under the concrete;

and D, chiseling the concrete covered on the steel backing plate, installing an anchorage device, and tensioning and sealing the anchor cable.

Preferably, in the step a, a hole inclination control measure is made before drilling, and the hole channel is cleaned after drilling.

Preferably, in the step D, the chiseling area is adapted to the anchor, and no concrete remains between the anchor and the steel backing plate when the anchor is installed.

Preferably, in the step D, the anchor sealing includes cutting off the steel strand, wrapping the anchor rope head with a PVC pipe, and pouring concrete into the pipe.

By adopting the technical scheme, the invention has the following beneficial technical effects:

for traditional anchor pier construction technology accomplish earlier the reinforcement of waist rail or post and ligature, on this basis, carry out the reinforcement of anchor pier in addition again, set up the anchor rope at last. According to the construction method, the steel backing plate is welded and the concrete is poured on the reinforcement binding basis of the waist beam or the column, then the anchor is installed by drilling, and finally the anchor cable is tensioned and sealed, so that the construction steps are reduced, the anchor piers are reduced, the occupied space of the engineering structure is small, the engineering cost is reduced, and the construction efficiency is improved.

Drawings

Fig. 1 is a flowchart of a method for constructing anchor pier according to an embodiment of the present invention;

fig. 2 is a large drawing of an anchor cable pier provided by an embodiment of the invention.

Detailed Description

The invention is described in further detail below with reference to the following figures and embodiments:

reference numerals in the drawings of the specification include: anchor 1, steel backing plate 2, PVC pipe 3, steel sleeve 4, steel strand wires 5, waist rail 6.

Embodiments are generally shown in fig. 1 and 2, a method of constructing a tendon pier comprising:

and step A, drilling an anchor cable according to structural arrangement and reinforcement design requirements, installing the anchor cable, and then drilling and grouting.

Specifically, a hole inclination control measure is made before drilling, a hole channel is cleaned after drilling, dust in the hole is blown clean by blowing compressed air into the hole through an air compressor so as to avoid reducing the bonding strength of cement mortar and hole wall rock soil, then an anchor cable is installed, namely a steel strand 5 and a steel sleeve 4 are installed, then the drilling hole is grouted, the grouting is continuously and slowly carried out, and the sign is finished when thick slurry overflows from the hole opening.

And step B, finishing the reinforcement of the wale 6 or the column, and welding the steel backing plate 2 on the wale 6 or the column.

And step C, pouring concrete of the waist beam 6 or the column, and covering the steel base plate 2 under the concrete.

And D, chiseling the concrete covered on the steel backing plate 2, installing the anchorage device 1, and tensioning and sealing the anchor cable.

And D, matching the chiseling area with the anchorage device 1, and enabling no concrete residue to exist between the anchorage device 1 and the steel backing plate 2 when the anchorage device 1 is installed.

And D, sealing the anchor, namely cutting off the steel stranded wire 5, wrapping the anchor cable head by using the PVC pipe 3, and pouring concrete into the pipe.

Specifically, tensioning of the anchor cable is carried out in a grading mode, once compensation tensioning is carried out after a week of tensioning is completed, locking is carried out, redundant steel strands 5 exceeding 10cm of the anchor are cut off by mechanical cutting after locking, the anchor cable head is wrapped by the PVC pipe 3 and then filled with cement mortar, vibration is dense, and the strength of the concrete for sealing the anchor is not lower than C20.

The foregoing is merely an example of the present invention and common general knowledge in the art of designing and/or characterizing particular aspects and/or features is not described in any greater detail herein. It should be noted that, for those skilled in the art, without departing from the technical solution of the present invention, several variations and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. An anchor rope pier construction method is characterized by comprising the following steps:

2. The anchor rope pier construction method according to claim 1, wherein in the step A, a hole inclination control measure is established before drilling, and a hole channel is cleaned after drilling.

3. The anchor rope pier construction method according to claim 1, wherein in the step D, the chiseling area is matched with the anchor, and no concrete remains between the anchor and the steel backing plate when the anchor is installed.

4. The anchor rope pier construction method according to claim 1, wherein the anchor sealing step D comprises cutting off steel strands, wrapping the anchor rope head with PVC pipe, and pouring concrete into the pipe.