CN203285452U - Anchor pile continuous wall controlling floor heave deformation of soft rock roadway - Google Patents

Abstract

The utility model discloses an anchor pile continuous wall controlling floor heave deformation of a soft rock roadway. The anchor pile continuous wall is mainly composed of reinforced concrete walls, steel sheet piles, sprayed concrete and reinforcement meshes, wherein the reinforced concrete walls are arranged on two sides below the bottom surface of the roadway and composed of rectangular reinforcement cages and cast-in-place concrete; the steel sheet piles are arranged on the lower sides of the reinforced concrete walls and composed of joist steel and the cast-in-place concrete; the sprayed concrete and the reinforcement meshes are arranged on the bottom surface of the roadway. The anchor pile continuous wall can effectively cut slip lines caused by surrounding rock deformation fracture, prevents surrounding rock from moving and slipping, and therefore reduces the floor heave degree, and is particularly suitable for treatment of wide-range floor heave deformation disasters of the coal mine mining roadway under the extreme conditions of high stress, high expansion, extremely soft rock and the like.

Description

Control the anchoring pile diaphragm wall of soft-rock tunnel pucking distortion

Technical field

The utility model relates to the soft rock roadway support device, relates in particular to a kind of anchoring pile diaphragm wall for controlling the distortion of soft-rock tunnel pucking.

Background technology

The pucking deformation failure is the ubiquitous mode of failure of coal mine roadway, and particularly outstanding in soft-rock tunnel, violent pucking distortion can cause the unstability in whole tunnel, reduce the tunnel useful area, affect the normal use in tunnel, increase maintenance and drop into, even can cause serious accident.

At present, the method for improvement soft-rock tunnel pucking has a variety of, as arch of the anti-end, floor grouting, base plate, plays anchor pole and closed steel bracket etc.For low stress or the not too soft situation of lithology, said method can effectively be controlled the distortion of country rock pucking.But under heavily stressed or dead-soft rock condition, Rheological Deformation or shearing slip distortion very easily occur in the roadway floor rock mass, and said method can not effectively be controlled the pucking deformation failure in this tunnel, exists safety upper unreliable, economically irrational problem.

According to mechanical analysis as can be known, by diaphragm wall, cut off the skid wire that surrouding rock deformation is broken, can stop country rock motion and slippage, thereby reduce the Floor Heave in Roadway degree.Yet when traditional diaphragm wall was used for coal mine roadway, its Rigidity and strength was inadequate, can not bear huge pressure from surrounding rock; While adopting reinforced concrete wall, as Chinese patent 2012103070011, due to constructional difficulties, the body of wall height is restricted, and can't be deep into roadway floor and stablize rock stratum, is difficult to obtain satisfied effect.

Summary of the invention

The purpose of this utility model is to address the above problem by the fit applications of steel sheet pile and reinforced concrete wall, and a kind of anchoring pile diaphragm wall for controlling the distortion of soft-rock tunnel pucking is provided.

Its technical solution is:

A kind of anchoring pile diaphragm wall of controlling the distortion of soft-rock tunnel pucking, mainly be comprised of reinforced concrete wall, steel sheet pile, sprayed mortar and steel mesh reinforcement, wherein:

Described reinforced concrete wall, be arranged in the position, both sides of bottom surface, tunnel below; Be highly 600 ~ 1000mm, width is 350 ~ 500mm; Formed by rectangle reinforcing cage and cast-in-situ concrete; The rectangle reinforcing cage is comprised of main muscle and stirrup, and main muscle arranges vertically, and each body of wall comprises six main muscle, and the stirrup disposition interval is 200 ~ 400mm;

Described steel sheet pile, be arranged in the reinforced concrete wall downside, and the spacing of adjacent two pile center is 800 ~ 1200mm; The diameter of stake is 250 ~ 400mm, and the degree of depth is 700 ~ 1200mm, i iron and cast-in-situ concrete, consists of; I iron length is wall construction gash depth and stake hole degree of depth sum, and upside extends in reinforced concrete wall, forms with it overall structure, according to the colliery current material, can change waste and old steel rail into;

Described sprayed mortar and steel mesh reinforcement, all be arranged in the bottom surface, tunnel, and sprayed mortar thickness is 150 ~ 250mm, and the steel mesh reinforcement both sides are connected with the rectangle reinforcing cage of reinforced concrete wall.

Job practices of the present utility model is:

A, the form that coordinates artificial pick to dig with pneumatic pick, by given center line and dig highly clearly roadway floor, dig out the wall construction groove straight down along two walls, then from bottom land, digs out circular stake hole downwards;

After b, excavation are completed, i iron is vertically inserted circular stake hole, to the interior fluid concrete in stake hole, and vibration compacting, after concrete has some strength, the rectangle reinforcing cage of colligation is in advance put into groove, lay steel mesh reinforcement in the bottom surface, tunnel and its both sides are connected with the reinforcing bar of concrete wall, then use the pouring concrete body of wall, finally at bottom surface, tunnel sprayed mortar;

C, process as required the length of roadway floor, repeating step a, b, until the anchoring pile construction of diaphragm wall is complete.

Compared with prior art, the advantage and the beneficial effect that have comprise the utility model:

(1) in the process in excavation wall construction groove and circular stake hole, the stress of primary rock obtains certain release, has reduced the soft rock roadway support difficulty; (2) anchoring pile is deep into roadway floor and stablizes rock stratum, and the diaphragm wall structure can stop the Rheological Deformation of country rock to the bottom, tunnel, both in conjunction with application, improved the rigidity of body of wall, and can effectively cut off the skid wire that surrouding rock deformation is broken, stop country rock motion and slippage, thereby reduce the pucking degree; (3) form an integral body with the anchoring pile diaphragm wall after the concrete setting of the steel mesh reinforcement of roadway floor laying and injection, its pressure from surrounding rock of bearing can be delivered to the base slab stability rock stratum, thereby it is stable to keep roadway floor, is specially adapted to the improvement of pucking distortion on a large scale disaster in stope of coal mines tunnel under the extreme conditions such as heavily stressed, high expansion and dead-soft rock.

Description of drawings

The utility model is described in further detail below in conjunction with accompanying drawing and the specific embodiment:

Fig. 1 is structure section schematic diagram of the present utility model;

Fig. 2 is the schematic top plan view of Fig. 1;

Fig. 3 is rectangle reinforcing cage arrangement of reinforcement.

Marginal data, 1-reinforced concrete wall, 2-steel sheet pile, 3-sprayed mortar, 4-steel mesh reinforcement, 5-i iron, 6-master's muscle, 7-stirrup.

The specific embodiment

As illustrated in fig. 1 and 2, a kind of anchoring pile diaphragm wall of controlling the distortion of soft-rock tunnel pucking of the present invention, mainly be comprised of reinforced concrete wall 1, steel sheet pile 2, sprayed mortar 3 and steel mesh reinforcement 4, wherein:

Described reinforced concrete wall 1, be arranged in the position, both sides of bottom surface, tunnel below; Be highly 750mm, width is 400mm; Consist of rectangle reinforcing cage and cast-in-situ concrete, the rectangle reinforcing cage is comprised of main muscle 6 and stirrup 7, and main muscle arranges vertically, and each body of wall comprises six main muscle, and the stirrup disposition interval is 300mm;

Described steel sheet pile 2, be arranged in reinforced concrete wall 1 downside, and the spacing of adjacent two pile center is 1000mm; The diameter of stake is 350mm, and the degree of depth is 750mm, i iron 5 and cast-in-situ concrete, consists of; The i iron model adopts 25a, and length is 1500mm, and upside extends in reinforced concrete wall 1, forms with it overall structure, according to the colliery current material, can change waste and old steel rail into;

Described sprayed mortar 3 and steel mesh reinforcement 4, all be arranged in the bottom surface, tunnel, and sprayed mortar thickness is 150mm, and the steel mesh reinforcement both sides are connected with the rectangle reinforcing cage of concrete wall.

During construction, the form that at first with pneumatic pick, coordinates artificial pick to dig, by given center line and dig highly clearly roadway floor, dig out the wall construction groove straight down along two walls, then from bottom land, digs out circular stake hole downwards; After excavation is completed, i iron 5 is vertically inserted circular stake hole, to the interior fluid concrete in stake hole, and vibration compacting, after concrete has some strength, the rectangle reinforcing cage of colligation is in advance put into groove, lay steel mesh reinforcement in the bottom surface, tunnel and its both sides are connected with the reinforcing bar of concrete wall, then use the pouring concrete body of wall, finally at bottom surface, tunnel sprayed mortar; Process as required the length of roadway floor, repeating step a, b, until the anchoring pile construction of diaphragm wall is complete.

The above embodiment, be a kind of of the more preferably concrete embodiment of the present invention, and those skilled in the art carries out in the technical solution of the present invention scope common variation and replacement all should be included in protection scope of the present invention.

Claims (1)

1. an anchoring pile diaphragm wall of controlling the distortion of soft-rock tunnel pucking, is characterized in that, mainly by reinforced concrete wall, steel sheet pile, sprayed mortar and steel mesh reinforcement, formed, wherein:

Described reinforced concrete wall, be arranged in the position, both sides of bottom surface, tunnel below; Be highly 600 ~ 1000mm, width is 350 ~ 500mm; Consist of rectangle reinforcing cage and cast-in-situ concrete, the rectangle reinforcing cage is comprised of main muscle and stirrup, and main muscle arranges vertically, and each body of wall comprises 6 ~ 10 main muscle, and the stirrup disposition interval is 200 ~ 400mm;

Described steel sheet pile, be arranged in the reinforced concrete wall downside, and the spacing of adjacent two pile center is 800 ~ 1200mm; The diameter of stake is 250 ~ 400mm, and the degree of depth is 700 ~ 1200mm, i iron and cast-in-situ concrete, consists of; I iron length is wall construction gash depth and stake hole degree of depth sum, and upside extends in reinforced concrete wall, forms with it overall structure;

Described sprayed mortar and steel mesh reinforcement, all be arranged in the bottom surface, tunnel, and sprayed mortar thickness is 150 ~ 250mm, and the steel mesh reinforcement both sides are connected with the rectangle reinforcing cage of reinforced concrete wall.

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