CN-117804300-B - Covered type protection structure for blasting excavation of high and steep side slope

CN117804300BCN 117804300 BCN117804300 BCN 117804300BCN-117804300-B

Abstract

The invention relates to the technical field of slope excavation protection, in particular to a covered type protection structure for blasting excavation of a high and steep slope, which comprises a covered part, a counterweight dust falling part and a protection device, wherein the covered part comprises a protection net and counterweight strips positioned at two ends of the protection net, the two ends of the protection net and the counterweight strips are movably connected through a stretch-resistant connecting assembly, the counterweight dust falling part comprises a water tank arranged above the protection net and connecting seats respectively fixed on upper base surfaces of the two counterweight strips, holes are formed in the bottom of the water tank at equal intervals, water outlets are formed in the bottom of the water tank at equal intervals on the periphery of the holes, and an ejection mechanism is arranged in the holes.

Inventors

CHENG XUEJUN
ZHAO JIAHAO
LI YE
HAN CHENGLI
WU CHUNGANG
CAI YUNBO
Tao Qizhong
LI DONGYUAN
ZHANG LIANG
LI XUEHUI
LI PINGFENG

Assignees

华能西藏雅鲁藏布江水电开发投资有限公司
中国水利水电第十四工程局有限公司

Dates

Publication Date: 20260508
Application Date: 20231229

Claims (6)

1. A cover type protective structure for blasting excavation of high and steep side slopes is characterized by comprising the following components: the covering part (100) comprises a protective net (101) and counterweight strips (102) positioned at two ends of the protective net (101), wherein the two ends of the protective net (101) are movably connected with the counterweight strips (102) through stretch-proof connecting components (103); The counterweight dust fall part (200) comprises a water tank (201) arranged above the protective net (101) and connecting seats (202) respectively fixed on the upper base surfaces of the two counterweight bars (102), holes (203) are formed in the bottom of the water tank (201) at equal intervals, water outlet holes (204) are formed in the bottom of the water tank (201) at equal intervals on the periphery of the holes (203), and an ejection mechanism (205) is arranged in the holes (203); The ejection mechanism (205) comprises an outer assembly (205 a) and an inner assembly (205 b) movably arranged in the outer assembly (205 a); The outer assembly (205 a) comprises a ring seat (205 a-1) fixed at the bottom of the water tank (201) and communicated with the hole (203) and a movable column (205 a-2) movably arranged in the hole (203) and the ring seat (205 a-1), a sealing plate (205 a-3) is fixed above the outer assembly (205 a), and the sealing plate (205 a-3) is positioned in the water tank (201) and covers the hole (203); The inner assembly (205 b) comprises a rotary guide groove (205 b-1) arranged on the outer side of the ring seat (205 a-1) and a guide column (205 b-2) fixed on the periphery of the movable column (205 a-2), and the other end of the guide column (205 b-2) is inserted into the rotary guide groove (205 b-1); The rotary guide groove (205 b-1) is internally provided with a jacking column (205 b-3) at the bottom of the movable column (205 a-2), the upper end of the jacking column (205 b-3) moves in the ring seat (205 a-1) through a movable disc (205 b-4), and an ejection spring (205 b-5) is connected between the movable disc (205 b-4) and the guide column (205 b-2).
2. The covered type protection structure for blasting excavation of high and steep side slopes as set forth in claim 1, wherein the stretch-proof connecting member (103) comprises a tensile member (103 a), one side of the tensile member (103 a) is connected with the protection net (101) through a connecting member (103 b), and the other side of the tensile member (103 a) is connected with the counterweight bar (102) through a clamping member (103 c).
3. The covered type protection structure for blasting excavation of high and steep side slopes as set forth in claim 2, wherein the tensile member (103 a) comprises a fixed plate (103 a-1) and a tensile plate (103 a-2) arranged on one side of the fixed plate (103 a-1), three groups of connecting grooves (103 a-3) are formed in one side of the fixed plate (103 a-1) at equal intervals, two guide posts (103 a-4) are fixed on one side of the fixed plate (103 a-1) at equal intervals, the other ends of the guide posts (103 a-4) penetrate through the tensile plate (103 a-2), and a tensile spring (103 a-5) is sleeved outside the guide posts (103 a-4) extending out of one side of the tensile plate (103 a-2).
4. The covered type protection structure for blasting excavation of high and steep side slopes as set forth in claim 3, wherein the connecting piece (103 b) comprises a first connecting sleeve (103 b-1) and a second connecting sleeve (103 b-2), movable arms (103 b-3) are fixed on one sides of the fixed plate (103 a-1) and the stretching plate (103 a-2), pin columns (103 b-4) are rotatably connected to the tail ends of the two movable arms (103 b-3), an installation seat (103 b-5) is sleeved on the outer portion of each pin column (103 b-4), and the installation seat (103 b-5) is fixed on one side of the stretching plate (103 a-2) through bolts.
5. The covered type protection structure for blasting excavation of high and steep side slopes as set forth in claim 4, wherein the clamping piece (103 c) comprises a rotating column (103 c-1) rotatably arranged inside the counterweight bar (102), positive and negative threads (103 c-2) are respectively arranged at positions, corresponding to three groups of connecting grooves (103 a-3), on the rotating column (103 c-1), one end of the rotating column (103 c-1) penetrates through the counterweight bar (102) and is fixedly provided with a screw head (103 c-3), each group of positive and negative threads (103 c-2) is connected with two movable sleeves (103 c-4) in a threaded manner, and the movable sleeves (103 c-4) are directly movably connected with the connecting grooves (103 a-3) through connectors (103 c-5).
6. The covered type protection structure for blasting excavation of high and steep side slopes as set forth in claim 5, wherein the plug connector (103 c-5) comprises a notch (103 c-5 a) formed in one side of the movable sleeve (103 c-4) and a fixed column (103 c-5 b) fixed in the connecting groove (103 a-3), the movable strip (103 c-5 c) is sleeved outside the fixed column (103 c-5 b), springs I (103 c-5 d) are fixed at two corners of one side of the notch (103 c-5 a), springs II (103 c-5 e) are fixed at the other two corners of the other side of the notch (103 c-5 a), a rotating block (103 c-5 f) is rotatably connected to the inside of the notch (103 c-5 a), a locking groove (103 c-5 g) is formed in one side of the fixed column (103 c-5 b), and a sliding block (103 h) is connected to one side of the notch (103 c-5 a) and is connected to the other two sides of the notch (103 c-5 a) by sliding blocks (103 e).

Description

Covered type protection structure for blasting excavation of high and steep side slope Technical Field The invention relates to the technical field of slope excavation protection, in particular to a cover type protection structure for blasting excavation of a high-steep slope. Background The surrounding environment of the high and steep side slope is complex, the traffic main road and river are arranged below, villages and hydropower stations are arranged around, and falling rocks and debris flows can harm the lower main road or the building, so that the falling slope needs to be excavated for protection; the slope excavation adopts mechanical excavation and blasting excavation, and the blasting excavation is generally distributed in a blasting area by adopting detonators according to a planning layout, so that the blasting is realized on the rock or soil layer of the blasting area through blasting, the effect of loosening the soil or treating the rock is realized, and the subsequent mechanical rapid excavation is facilitated; Flying stones and a large amount of dust are generated during blasting, and the flying stones can cause potential safety hazards to downhill building or site constructors, so that a protection net is covered in a blasting area during conventional blasting, and a plurality of sand bags are placed on the protection net to resist impulsive force generated during blasting; however, the method has high difficulty in early-stage placement and later-stage recovery, needs to consume a large amount of manpower resources, and cannot achieve the effect of effectively reducing dust. Disclosure of Invention The invention is provided in view of the problems of the existing cover type protection structure for blasting excavation of high and steep side slopes. Therefore, the invention aims to provide a covered type protection structure for blasting excavation of high and steep side slopes. In order to solve the technical problems, the invention provides a cover type protection structure for blasting excavation of a high-steep side slope, which comprises the following components: The covering part comprises a protective net and counterweight bars positioned at two ends of the protective net, wherein the two ends of the protective net are movably connected with the counterweight bars through anti-stretching connecting components; The counterweight dust fall part comprises a water tank arranged above the protective net and connecting seats respectively fixed on the upper base surfaces of the counterweight bars, holes are formed in the bottom of the water tank at equal intervals, water outlet holes are formed in the periphery of the water tank at equal intervals, and an ejection mechanism is arranged in each hole. As an optimal scheme of the cover type protective structure for blasting excavation of the high and steep side slopes, the ejection mechanism comprises an outer assembly and an inner assembly movably arranged in the outer assembly. As a preferable scheme of the cover type protection structure for blasting excavation of the high and steep side slopes, the cover type protection structure for blasting excavation of the high and steep side slopes comprises an outer assembly and a protective cover, wherein the outer assembly comprises a ring seat fixed at the bottom of a water tank and communicated with a hole, and a movable column movably arranged in the hole and the ring seat, a sealing plate is fixed above the outer assembly, is positioned in the water tank and covers the hole. As a preferable scheme of the cover type protective structure for blasting excavation of the high and steep side slopes, the inner assembly comprises a rotary guide groove and a guide column, wherein the rotary guide groove is formed in the outer side of the ring seat, the guide column is fixed to the periphery of the movable column, and the other end of the guide column is inserted into the rotary guide groove. As a preferable scheme of the cover type protection structure for blasting excavation of the high and steep side slopes, a jacking column is arranged at the bottom of a movable column in the rotary guide groove, the upper end of the jacking column moves in a ring seat through a movable disc, and an ejection spring is connected between the movable disc and the guide column. As a preferable scheme of the cover type protective structure for blasting excavation of high and steep side slopes, the anti-stretching connecting assembly comprises a stretching-resistant piece, one side of the stretching-resistant piece is connected with a protective net through a connecting piece, and the other side of the stretching-resistant piece is connected with a counterweight strip through a clamping piece. The invention relates to a cover type protection structure for blasting excavation of a high-steep side slope, which is a preferable scheme, wherein a tensile piece comprises a fixed plate and a tensile plate positioned on one side