CN103031842A

CN103031842A - Soil-squeezing type soil anchor

Info

Publication number: CN103031842A
Application number: CN2011103111290A
Authority: CN
Inventors: 杨学祥; 罗会军; 孔祥国; 马萍
Original assignee: Yangtze University
Current assignee: Yangtze University
Priority date: 2011-10-08
Filing date: 2011-10-08
Publication date: 2013-04-10

Abstract

The invention discloses a soil-squeezing type soil anchor, which relates to a novel anchor device and a method characterized in that a steel pipe is used as a tie bar, is simultaneously used as a drill stem in anchor eye drilling and is used as a grouting pipe in grouting, an extended prefabricated conical concrete drill bit is arranged at the end part of the steel pipe, and the drill bit and the drill stem (i.e. the tie bar) are squeezed into a soil layer by thrust in drilling. The soil-squeezing type soil anchor disclosed by the invention belongs to the technical field of slope strengthening, and is particularly suitable for plastic-soft plastic soil slope strengthening and soil dam slope slump strengthening in foundation ditch construction engineering. According to the developed novel soil-squeezing type soil anchor, the construction process of the conventional anchor is changed, so that pore-forming and steel bar embedding are completed in one step, the construction procedure is greatly shortened, the construction progress is accelerated, and a good foundation is laid for the rapid and orderly proceeding of next job. At the same time, good benefits are brought to engineering construction.

Description

The soil compaction type soil bolt

Technical field:

This invention belongs to reinforcing side slope technique field, be specially adapted in the architecture Foundation Pit Engineering plastic-softly mould that soil-slope is reinforced and soil property embankment slope slump is reinforced.

Background technology:

Employed bolt anchorage technology mostly is first and forms anchor hole with the auger punching in the geotechnical engineering at present, then implants reinforcing bar as lacing wire, sends into Grouting Pipe again, and slip casting in the last past anchor hole is carried out anchoring and formed complete anchor pole after slurries are frozen into calculus.This method working procedure more complicated takes time and effort, and since the general spoir technique that adopts during pore-forming, the anchored force less between soil bolt calculus body and the peripheral native wall.

Summary of the invention:

Design a kind of novel soil compaction type anchor bolt and construction technology thereof.Use specific steel pipe as the lacing wire of anchor pole, this steel pipe is again power transmission drilling rod in the anchor hole drilling construction process and the Grouting Pipe in the mortar depositing construction process simultaneously.And utilize the conical drill bit that enlarges to clamp-on soil layer during pore-forming and form anchor hole, without spoir, its peripheral Tu Bi is more closely knit, causes soil layer larger to the frictional force of anchor pole calculus body, can be for anchor pole provides larger anti-pulling capacity, for the engineering application brings good income.

Technical scheme of the present invention is: reduce the bar planting process in traditional soil bolt construction sequence (boring-bar planting-slip casting), because drilling rod itself is lacing wire and Grouting Pipe, so boring procedure is exactly the process of bar planting and embedding Grouting Pipe.Drill bit adopts the concrete prefabricated element of cone form, and size is 60-100mm, highly is 50-100mm; Being embedded with diameter on the circular cone type drill bit is 6～8mm reinforcing bar, is connected with steel pipe (being lacing wire) to adopt welding or socket; Steel pipe (being lacing wire) diameter of section is less than bit diameter, and the diameter of section of steel pipe is 48-70mm, and pipe thickness is 4-8mm, and length is according to the actual requirement of engineering calculative determination; The steel pipe front end is reserved 4-6 small holes in advance, and hole diameter is of a size of 6-15mm, and slurry stream goes out the through hole of steel pipe (this moment is as Grouting Pipe) during as slip casting; The steel flap that the steel disc that to be welded with three thickness on the hole be 2～3mm is made, during for the protection of boring, the slip casting hole is stopped up by soil when preventing that steel pipe from contacting with soil layer.

The invention has the beneficial effects as follows: compare with traditional anchor pole, this soil compaction type soil bolt has reduced construction sequence, so that boring and bar planting one-shot forming reduce constructor's labour intensity; With anchor hole perisporium soil layer dense extrusion, the ultimate friction capacity between soil layer and the calculus body increased, and can provide larger design uplift resistance for anchor pole when conical drill bit crept into simultaneously; Improved the economic benefit of anchor pole; Also more meet environmental requirement without spoir technique.This soil compaction type soil bolt is simple in structure, and it is also convenient to operate.

Description of drawings:

Fig. 1 is this invention floor map.

Fig. 2 is this invention detail.

Fig. 3 is this invention detail.

Among the figure, 1. embedded bar, 2. precast concrete circular cone drill bit, 3. power transmission pipe, 4. hole.5. flap

The specific embodiment:

The mode that first drilling rod (being power transmission pipe 3) is connected with welding is connected on the precast concrete drill bit 2 with embedded bar 1; Before the punching beginning, the bit part of member is aimed at the position that needs punching, utilize pressurization or device to exert pressure at power transmission pipe, power passes on the conical drill bit 2 by power transmission pipe 3, and drill bit 2 squeezes opens peripheral soil body pore-forming to projected depth, stops pressurization.Drill bit 2, drilling rod 3 are from staying in the soil body of stratum; Then utilize the high-pressure slip-casting pipe to 3 li injected water mud of tubular type drilling rod and chemical agent, cement paste flows out to pipe is outer by hole 4 under condition of high voltage, reaches with borehole circumference soil and combines closely, till slip casting until hole is filled with.

Claims

1. soil compaction type soil bolt.Utilize static pressure or hole making by vibration equipment, the special steel pipe that front end is fixed a precast concrete drill bit clamp-ons that (bit diameter should be consistent with the design size of anchor hole in the soil, but diameter of steel tube should be less than the anchor hole diameter), cause anchor hole, then utilize this steel pipe that anchor hole is carried out slip casting, slip casting calculus body locks this steel pipe after reaching some strength, just forms needed soil compaction type soil bolt.

2. according to claim 1. described soil compaction type soil bolt.It is characterized in that lacing wire is a steel pipe, adopt welding or socket mode to fix with drill bit, this steel pipe is used as the power transmission drilling rod when creeping into, and this steel pipe is used as Grouting Pipe during grouting.

3. according to claim 1. described soil compaction type soil bolt.It is characterized in that the steel pipe front end is provided with hole, during slip casting as the slurry channels mouth between Grouting Pipe (steel pipe) and the anchor hole space.It is not blocked to be provided with flap steel disc protection cavity on the hole.

4. according to claim 1. described soil compaction type soil bolt.It is characterized in that drill bit is concrete prefabricated cone drill bit, cone diameter must be greater than the diameter of steel pipe.