CN210862412U

CN210862412U - Protection device suitable for high steep side slope goes out hole blasting

Info

Publication number: CN210862412U
Application number: CN201921873474.1U
Authority: CN
Inventors: 杨静; 朱云峰; 周震钧; 张建清; 向可
Original assignee: Sinohydro Bureau 8 Co Ltd
Current assignee: Sinohydro Bureau 8 Co Ltd
Priority date: 2019-10-31
Filing date: 2019-10-31
Publication date: 2020-06-26
Anticipated expiration: 2029-10-31

Abstract

The utility model discloses a protector suitable for blasting of steep side slope exit hole, include first layer protection network, guard plate, second floor protection network and the fixed bed of arranging in proper order from the inlayer to the skin, the exit hole department of steep side slope is laid to the first layer protection network, and the fixed bed is fixed on steep side slope and inwards compresses tightly second floor protection network. This protector suitable for blasting of high steep side slope exit hole protective effect is good, factor of safety is high and installation and demolish the convenience.

Description

Protection device suitable for high steep side slope goes out hole blasting

Technical Field

The utility model relates to a hydraulic engineering field especially relates to a protector suitable for high steep side slope goes out hole blasting.

Background

In the field of hydraulic engineering, particularly when an arch dam is built in a high mountain valley, the dam has high requirements on hills at two side dams, a resistance body drainage hole is often arranged in the hills behind the dam, and a grouting curtain hole and a drainage hole are arranged in the hills at the dam dams. Because no construction path is usually communicated into the working face in the early stage of the high and steep slope, part of the caverns can be excavated from inside to outside. For projects with a shorter construction period, a plurality of working faces are often constructed simultaneously in different sections, when the upper part is subjected to tunnel outlet blasting excavation, excavation operation or concrete pouring construction is usually carried out on the opposite side of the lower part or the river, flying stones generated by blasting easily damage equipment on the opposite side of the lower part or the river, and broken slag generated by blasting is also a great potential safety hazard if the broken slag is retained on a side slope. Therefore, in the construction of hydraulic engineering, when a part of caverns are excavated to a slope surface from inside to outside for a certain distance, safety protection needs to be made at the position of a cavern outlet in advance to prevent the caverns from suddenly penetrating to the outside to generate flying stones. In the prior art, only bamboo splints or blasting protection rubber nets are usually adopted as protection, the bamboo splints are easy to break, the protection safety coefficient is low, and the construction risk is high; the blasting protection rubber net has relatively high manufacturing cost and is easy to increase the construction cost.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome prior art not enough, provide a protection effect is good, factor of safety is high and install and demolish convenient protector that is applicable to the blasting of high steep side slope exit hole.

In order to solve the technical problem, the utility model discloses a following technical scheme:

the utility model provides a protector suitable for blasting of steep side slope exit hole, includes first layer protection network, guard plate, second floor protection network and the fixed bed that arranges in proper order from the inlayer to the skin, the exit hole department on steep side slope is laid to first layer protection network, the fixed bed is fixed on steep side slope and inwards compresses tightly second floor protection network.

As a further improvement of the above technical solution:

the first layer of protective net is a double-layer woven net.

The protection plate is a double-layer bamboo splint.

The bamboo splint on one layer of the double-layer bamboo splint is transversely arranged, and the bamboo splint on the other layer is longitudinally arranged.

The second layer of protective net is of a double-layer structure.

The fixing layer comprises a plurality of steel wire ropes, fixing pieces are arranged on the periphery of the second layer of protective screening and fixed on a steep slope, the middle of each steel wire rope is pressed inwards to form the second layer of protective screening, and two ends of each steel wire rope are oppositely pulled on the corresponding fixing pieces.

And the steel wire ropes are arranged in a staggered opposite pulling mode.

The periphery of the second layer of protective net is fixed on the fixing piece.

The fixing piece is a dowel or an anchor rod.

Compared with the prior art, the utility model has the advantages of:

the utility model is suitable for a protector that high steep side slope goes out hole mouth blasting adopts soft and hard material collocation such as first layer protection network, the guard plate, second floor protection network, compress tightly in hole mouth department through the fixed bed, the impact deformation that first layer protection network can effectual blasting of bearing produce, the guard plate can effectually block the rubble, whole protector has taken place great deformation after the blasting is accomplished, but all rubbles that can both effectual pocket live the blasting and produce, the protecting effect is fabulous, factor of safety is high, and the installation and demolish the convenience, can be fine be applicable to the hole mouth blasting protection of various high steep side slopes.

Drawings

Fig. 1 is a schematic view of the protection device for blasting high and steep slope exit.

Fig. 2 is an enlarged view at a in fig. 1.

Fig. 3 is a side view structure diagram of the protection device suitable for blasting of high steep side slope exit.

The reference numerals in the figures denote:

1. a first layer of protective net; 2. a protection plate; 3. a second layer of protective net; 4. a fixed layer; 41. a wire rope; 5. a high steep side slope; 6. a hole outlet; 7. and a fixing member.

Detailed Description

The invention will be described in further detail with reference to the drawings and specific examples.

Fig. 1 to fig. 3 show the utility model is suitable for a protector's of high steep side slope exit hole blasting embodiment, this protector suitable for high steep side slope exit hole blasting includes first layer protection network 1, guard plate 2, second floor protection network 3 and the fixed bed 4 that arranges in proper order from the inlayer to the inlayer, and first layer protection network 1 lays in the exit hole 6 department of high steep side slope 5, and fixed bed 4 is fixed on high steep side slope 5 and inwards compresses tightly second floor protection network 3. This protector adopts first layer protection network 1, guard plate 2, soft or hard material collocation such as second floor protection network 3, compress tightly in a hole 6 department through fixed bed 4, first layer protection network 1 can effectually bear the impact deformation that the blasting produced, guard plate 2 can effectually block the rubble, even great deformation has taken place for whole protector after the blasting is accomplished, but can both live all rubbles that the blasting produced in effectual pocket, the protecting effect is fabulous, factor of safety is high, and the installation and demolish the convenience, can be fine be applicable to the 6 blasting protections in hole of various steep side slopes 5.

Specifically, first layer protection network 1 is double-deck machine netting, guard plate 2 is double-deck bamboo splint, the bamboo splint of one deck transversely sets up in the double-deck bamboo splint, the bamboo splint of another deck vertically sets up, second floor protection network 3 is bilayer structure, mounting 7 is dowel bar or stock, fixed layer 4 includes many wire rope 41, be equipped with mounting 7 around second floor protection network 3, mounting 7 is fixed in on the steep slope 5 of height, wire rope 41's middle part inwards compresses tightly second floor protection network 3, both ends are to drawing on relative mounting 7. The protection device adopts materials which are all combinations of common materials in construction, and parts of the protection device can be integrally processed outside the site and then hoisted to the site for installation, so that the protection safety coefficient is higher than that of the conventional bamboo splint, and the protection effect is better; compared with the special blasting protection rubber net, the method is economical to use, and the protection material is easy to obtain.

In this embodiment, the steel cables 41 are arranged in a staggered and opposite manner; the periphery of the second layer of protective screening 3 is fixed on the fixing piece 7, so that the protection effect is further improved.

In this embodiment, the double-deck machine netting and the double-deck bamboo splint of this protector inlayer can hoist to the working face after actual conditions is makeed in the scene or is accomplished in whole preparation outside the scene. The double-layer woven net is tightly adhered to the surface of the bedrock; the double-layer bamboo plywood is laid after the double-layer net is woven by a double-layer machine, and the two layers can be respectively arranged in the transverse direction and the longitudinal direction; two second layers of protective nets 3 are laid on the outer sides of the bamboo splints, and a layer of steel wire rope 41 is oppositely pulled on the periphery of the outermost layer; the second layer of protective screen 3 and the steel wire rope 41 are fixedly wound on the dowel bars of the hole, and the high and steep slope 5 can be used for replacing the dowel bars when a hole locking anchor rod or a slope support anchor rod is arranged on the hole locking anchor rod; as the blasting power of the cavern is huge, in order to ensure that the outer side protection can better bear the blasting impact force, short-footage weak blasting and blasting modes of firstly cutting and then surrounding are required to be adopted for excavation when the excavation is carried out to the last cycles of the side slope, so that the safety coefficient of blasting and protection is improved. Compared with the conventional bamboo splint, the blasting soft protection has higher protection safety coefficient and better protection effect; is more economical than the special blasting protection rubber net.

Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify equivalent embodiments, without departing from the scope of the technical solution of the present invention, using the technical content disclosed above. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides a protector suitable for blasting of high steep side slope exit hole which characterized in that: including first layer protection network (1), guard plate (2), second floor protection network (3) and fixed bed (4) that arrange in proper order from the inlayer to the inlayer, first layer protection network (1) is laid in exit (6) department of steep side slope (5), fixed bed (4) are fixed on steep side slope (5) and inwards are compressed tightly second floor protection network (3).

2. The protection device suitable for the high steep slope hole outlet blasting according to claim 1, characterized in that: the first layer of protective net (1) is a double-layer woven net.

3. The protection device suitable for the high steep slope hole outlet blasting according to claim 1, characterized in that: the protection plate (2) is a double-layer bamboo splint.

4. The protection device suitable for the high steep slope hole outlet blasting according to claim 3, characterized in that: the bamboo splint on one layer of the double-layer bamboo splint is transversely arranged, and the bamboo splint on the other layer is longitudinally arranged.

5. The protection device suitable for the high steep slope hole outlet blasting according to claim 1, characterized in that: the second layer of protective net (3) is of a double-layer structure.

6. The protection device suitable for high steep slope exit hole blasting according to any one of claims 1 to 5, characterized in that: the fixing layer (4) comprises a plurality of steel wire ropes (41), fixing pieces (7) are arranged on the periphery of the second layer of protective screening (3), the fixing pieces (7) are fixed on the steep slope (5), the middle of each steel wire rope (41) is pressed inwards to form the second layer of protective screening (3), and two ends of each steel wire rope are oppositely pulled on the corresponding fixing pieces (7).

7. The protection device suitable for the high steep slope hole outlet blasting according to claim 6, characterized in that: the steel wire ropes (41) are arranged in a staggered opposite pulling mode.

8. The protection device suitable for the high steep slope hole outlet blasting according to claim 6, characterized in that: the periphery of the second layer of protective screening (3) is fixed on the fixing piece (7).

9. The protection device suitable for the high steep slope hole outlet blasting according to claim 6, characterized in that: the fixing piece (7) is a dowel or an anchor rod.