CN211816117U

CN211816117U - Bottom arch concrete protection device of water delivery tunnel shaped like a Chinese character' ma

Info

Publication number: CN211816117U
Application number: CN201922068440.1U
Authority: CN
Inventors: 李怀国; 李志刚; 向子云
Original assignee: Sinohydro Bureau 1 Co Ltd
Current assignee: Sinohydro Bureau 1 Co Ltd
Priority date: 2019-11-27
Filing date: 2019-11-27
Publication date: 2020-10-30
Anticipated expiration: 2029-11-27

Abstract

The utility model belongs to the technical field of hydraulic engineering, a water-chestnut shaped water delivery tunnel's end arch concrete protection device is disclosed, the elastic cushion has been laid to the end arch current-passing surface upside of the water-chestnut shaped tunnel of having pour, and the bamboo board layer has been laid to the elastic cushion upside, and hierarchical metalling has been laid to bamboo board layer upside, and the cement stabilization metalling has been laid to hierarchical metalling upside. The utility model discloses overflow the tunnel arching protection with the shape of a hoof and change into by the stone sediment of pad in the past and spread elasticity bed course, bamboo board layer, level and join in marriage the metalling and cement stabilization metalling composite construction to set up the escape canal in both sides, effectively protect the arching cross-flow surface at the end, improved civilized construction environment, overcome the efficiency of construction low, personnel clear up intensity of labour is big, and is consuming time and labouring, the outstanding scheduling problem of potential safety hazard, through the utility model discloses can reduce civilized construction input expense, reduce artifical intensity of labour and potential safety hazard, improve civilized construction image for the construction progress practices thrift construction cost.

Description

Bottom arch concrete protection device of water delivery tunnel shaped like a Chinese character' ma

Technical Field

The utility model belongs to the technical field of hydraulic engineering, especially, relate to a water delivery tunnel's end arch concrete protection device is shaped like a hoof.

Background

Currently, the closest prior art in the industry is: and for the tunnel sections with the water burst risk of A, B level or the fault safety risk of A, B level, a side-excavation side-lining construction method is adopted, and tunnel excavation and lining are synchronously organized and implemented.

There are big section shape of a hoof water delivery tunnel of various performance in great hydraulic engineering construction, along with hydraulic engineering construction technology's maturity and development, at present, most shape of a hoof water delivery tunnel concrete lining construction methods generally are: firstly, pouring the bottom arch concrete by adopting a turnover mould, and then pouring the side top arch concrete by adopting a steel mould trolley.

The horseshoe-shaped water delivery tunnel is constructed by lining a bottom arch and carrying out concrete lining of a side top arch, a concrete mixing truck and a load-carrying material truck need to pass on the lined bottom arch, the vehicle passing time is long, the cast bottom arch concrete overflowing surface is easily abraded and damaged, and meanwhile, during construction of the side top arch, materials and sundries cannot be prevented from falling on the cast bottom arch to cause damage to the bottom arch concrete overflowing surface, the overflowing surface of the water delivery tunnel generally has higher requirements on the appearance quality of the lining concrete, and the whole operation effect and the appearance of the water delivery tunnel can be influenced even after repair.

The slag-tapping heavy truck and the load-carrying material transport truck need to pass on the bottom arch which is lined, the vehicle passing time is long, and the abrasion and the damage to the concrete overflow surface of the poured bottom arch are easily caused.

The conventional method for protecting the bottom arch concrete of the tunnel is to directly pad a layer of rock ballast excavated in the tunnel on the bottom arch concrete. The slabstone direct contact bottom arch concrete overflow surface, it can't reach protection bottom arch concrete overflow surface effect to cross the car for a long time and roll the easy damage, cause bottom arch concrete overflow surface to damage easily when clearing up the slabstone, in addition, because the tunnel oozes the water, need to carry out the watering maintenance to tunnel limit arch poured concrete in carrying out tunnel limit crown concrete lining in-process, and can smuggle moisture and mud secretly at the current in-process of vehicle, easily cause the bottom arch to backfill the slabstone and form mashed mud, can't satisfy on-the-spot civilized construction requirement, need to drop into a large amount of manual works and equipment and carry out routine maintenance, and the effect is not obvious. Therefore, how to overcome the defects of the prior art is a problem to be solved urgently in the technical field of hydraulic engineering at present.

In summary, the problems of the prior art are as follows:

(1) when the stone slag is used for protecting the concrete of the bottom arch of the tunnel, the protection effect is poor, and the damage to the concrete overflow surface of the bottom arch is easily caused.

(2) The bottom arch backfilling stone slag is easy to form sludge, cannot meet the requirements of on-site civilized construction, is inconvenient to maintain and has unobvious effect.

The significance of solving the technical problems is as follows: effectively protect the concrete overflow surface of the bottom arch, reduce the labor intensity of constructors, save the cost, improve the civilized construction image and improve the construction efficiency.

SUMMERY OF THE UTILITY MODEL

To the problem that prior art exists, the utility model provides a water delivery tunnel's end arch concrete protection device is shaped like a hoof.

The utility model is realized in such a way that the bottom arch concrete protection device of the water-conveying tunnel is provided with an elastic cushion layer, a bamboo board layer, a graded crushed stone layer, a cement stabilization crushed stone layer and drainage ditches arranged at two sides;

elastic cushion arranges on pouring the horseshoe tunnel bottom arch surface of overflowing, and the bamboo panel layer is laid in the elastic cushion top, covers elastic cushion, and the graded gravel layer is laid on the bamboo panel layer, rolls closely knit, and the cement is stabilized the gravel layer and is laid on the graded gravel layer, rolls and levels smoothly, and bottom arch protection cement stabilizes the gravel layer both sides and sets up the escape canal.

Further, the cement-stabilized gravel layer is composed of cement, a graded gravel layer and artificial sand.

Furthermore, the elastic cushion layer is directly laid on the poured flow surface of the bottom arch of the horseshoe-shaped tunnel.

Further, the thickness of the middle of the cement stabilized gravel layer is 20cm, and 2% of slopes are transversely arranged from the middle to two sides of the cement stabilized gravel layer to facilitate water drainage.

Furthermore, a water outlet is formed in one side of the red brick of the drainage ditch.

To sum up, the utility model discloses an advantage and positive effect do: the utility model discloses overflow the tunnel arching protection with the shape of a hoof and change into by the stone sediment of pad in the past and spread elasticity bed course, bamboo board layer, level and join in marriage the metalling and cement stabilization metalling composite construction to set up the escape canal in both sides, effectively protect the arching cross-flow surface at the end, improved civilized construction environment, overcome the efficiency of construction low, personnel clear up intensity of labour is big, and is consuming time and labouring, the outstanding scheduling problem of potential safety hazard, through the utility model discloses can reduce civilized construction input expense, reduce artifical intensity of labour and potential safety hazard, improve civilized construction image for the construction progress practices thrift construction cost.

The utility model discloses an elastic cushion layer, the bamboo sheet material layer, level grading metalling and cement stabilize the metalling and carry out special protection back to the arch overflow surface at the bottom of the U-shaped tunnel, make the road surface smooth and level, the tunnel oozes and gushes water and construction waste water direct flow to both sides escape canal, on-the-spot civilized construction environment is better, once only drop into the use back, except in time cleaning the road surface, need not like current arch protection need regularly clear up and lay again the stone ballast at argillization position, personnel and the input of equipment have been reduced, the interference of concrete construction is arched to the opposite side top has been reduced, the construction progress has been accelerated, compare with current protection method, can practice thrift 30% cost.

The utility model belongs to the category of hydraulic engineering technical field basis transformation, with the very big improvement of promotion hydraulic engineering horseshoe tunnel bottom arch overflow surface protection in the aspect of technology, efficiency, also not see relevant report in the domestic and foreign tunnel concrete construction literature.

The utility model discloses at present not yet see and use in hydraulic engineering construction, it aims at effectively protecting the bottom arch concrete surface of crossing, reduces constructor's intensity of labour, practices thrift the cost, improves civilized construction image, improves the efficiency of construction. The application value is higher in the concrete lining construction of the large horseshoe-shaped overflowing tunnel.

Drawings

Fig. 1 is a schematic structural view of a bottom arch concrete protection device of a horseshoe-shaped water delivery tunnel provided by an embodiment of the present invention;

fig. 2 is a structural water intention of a bamboo board layer provided by an embodiment of the invention;

FIG. 3 is a structural water intention of a red brick provided by an embodiment of the invention;

in the figure: 1. an elastic cushion layer; 2. a bamboo board layer; 3. grading a crushed stone layer; 4. a cement stabilized rubble layer; 5. red brick; 6. a bottom arch flow surface; 7. side top arch; 8. a drainage ditch; 9. a nut; 10. bamboo chips; 11. a bolt; 12. and a water outlet.

Detailed Description

In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings.

To the problem that prior art exists, the utility model provides a water delivery tunnel's of shape of a hoof arching concrete protection device, it is right to combine below attached drawing 1 to attached drawing 3 the utility model discloses do detailed description.

The elastic cushion layer 1 is directly laid on the bottom arch flow surface 6 and is laid flat; the bamboo board layer 2 is laid above the elastic cushion layer 1, and the laying is tight.

The graded broken stone layer 3 is prepared by mixing 20% of broken stone 1 (with the grain diameter of 31.5-20 mm), 25% of broken stone 2 (with the grain diameter of 20-10 mm), 30% of broken stone 3 (with the grain diameter of 10-5 mm) and 25% of sand (with the grain diameter of 4.75 mm), transporting to the site, paving above the bamboo board layer 2, and rolling and compacting by adopting vibration; the cement stabilized gravel layer 4 is formed by adding water into 5% of cement with the weight of gravel aggregate after the completion of mixing the gravel aggregate, wherein the gravel aggregate is formed by adding water into 55% of gravel (the particle size is 31.5-5 mm), 45% of artificial sand (the particle size is less than 5 mm), the mixture is transported to the bottom arch of the overflowing surface of the circular tunnel after the completion of mixing, the material is spread by adopting a back shovel, the material is rolled and compacted and smooth by using vibration, the thickness of the middle of the cement stabilized gravel layer 4 is 30cm, and 2% of slopes are transversely arranged from the middle to two sides for convenient drainage.

The drainage ditch 8 is built by red bricks 5 with the thickness of 240mm multiplied by 115mm multiplied by 53mm and is arranged at two sides of the cement stabilized gravel layer 4, the width of the brick building is 24cm, the pavement construction wastewater flows into the drainage ditch 8 through the pavement slope through the drainage port 12, and the maintenance water of the roof arch 7 flows into the drainage ditch 8 through the side walls at two sides.

The cement stabilized gravel layer 4 is composed of cement, a graded gravel layer 3 and artificial sand. The thickness of the middle of the cement stabilized gravel layer 4 is 20cm, and 2% of slopes are transversely arranged from the middle to two sides so as to facilitate water drainage.

The bamboo board layer 2 is formed by splitting moso bamboos into bamboo chips 10, and screwing the bamboo chips 10 which are arranged in parallel through bolts 11 and nuts 9 to manufacture a board-shaped object with the width of 20-30 cm and the length of 3 m.

The elastic cushion layer 1 is made of polyethylene, and the polyethylene elastic cushion layer 1 is formed by compounding two materials with different materials through chemical crosslinking of PE, EVA and the like at high temperature and high pressure. The surface close to the overflowing surface is soft and elastic, so that the overflowing surface is protected from being damaged even if the overflowing surface is severely impacted by the outside, and the other surface is made of a nano material with puncture resistance, so that the cushion layer cannot be damaged by a hard object. The elastic cushion layer 1 is 10mm thick. The elastic cushion layer 1 is directly laid on the poured horseshoe-shaped tunnel bottom arch flow surface 6.

The utility model discloses an elastic cushion layer 1, bamboo board layer 2, level grading metalling 3 and cement stabilize metalling 4 and carry out special protection to U-shaped tunnel bottom arch overflow surface 6 after, make the road surface smooth and level, the tunnel oozes and gushes water and construction waste water direct flow to both sides escape canal 8, the site civilization construction environment is better, once only after coming into use, except in time cleaning the road surface, need not like current bottom arch protection need regularly clear up and lay again the stone ballast at argillization position, the input of personnel and equipment has been reduced, the interference of 7 concrete construction of opposite side crown arch has been reduced, construction progress has been accelerated, compare with current protection method, can practice thrift 30% cost.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all the modifications and equivalents of the technical spirit of the present invention to any simple modifications of the above embodiments are within the scope of the technical solution of the present invention.

Claims

1. A bottom arch concrete protection device of a horseshoe-shaped water delivery tunnel is characterized in that the bottom arch concrete protection device of the horseshoe-shaped water delivery tunnel is provided with an elastic cushion layer;

the elastic cushion layer is laid on the upper side of the tunnel bottom arch overflowing surface, a bamboo board layer is laid on the upper side of the elastic cushion layer, a graded gravel layer is laid on the upper side of the bamboo board layer, and a cement stabilizing gravel layer is laid on the upper side of the graded gravel layer.

2. The bottom arch concrete protector of a horseshoe-shaped water delivery tunnel according to claim 1, wherein drainage ditches are built on both sides of the cement-stabilized gravel layer through red bricks.

3. The bottom arch concrete protector of a horseshoe-shaped water delivery tunnel according to claim 1, wherein the height of the space in the cement stabilized gravel layer is higher than the height of the two ends.

4. The bottom arch concrete protector of a horseshoe-shaped water delivery tunnel according to claim 2, wherein one side of the drainage ditch is provided with a drainage port.

5. The bottom arch concrete protection device of the horseshoe-shaped water delivery tunnel according to claim 1, wherein the bamboo plate layer is screwed through the juxtaposed bamboo chips by bolts and nuts, the width of the bamboo plate layer is 20 cm-30 cm, and the length of the bamboo plate layer is 2 m-3 m.