CN-121593482-B - High-speed extension engineering rock high slope excavation construction method

Abstract

The invention discloses a high-speed expansion engineering rock high-slope excavation construction method which comprises the steps of S101, S201, transversely layering, longitudinally segmenting and tunneling in steps to form a plurality of layers of slope work tables, S301, installing a slope protection device on the protection table in a follow-up mode, S401, conducting protection grid construction on the slope, S501, carrying out circulation operation, and repeating the steps S201-S401 until all rock high-slope excavation construction is completed. According to the invention, in the rock high slope excavation construction process, the slope protection device is arranged for protection, based on the concrete structural arrangement of the slope protection device, various rock falling conditions can be effectively blocked on the premise of not influencing the excavation construction operation, reliable safety assurance is formed, the structure of the slope protection device is simple and convenient to install, the construction cost can be effectively reduced, and the overall construction efficiency is improved.

Inventors

• WANG HUI
• Tan Enxin
• HUANG PEIWEI
• HUANG QIAOMIN
• Zhuang Zengze
• LI YANBIN
• LI SHIJUN
• MA CHAOHUI
• WEN KE
• YANG YUJIE
• YANG BO

Assignees

• 保利长大工程有限公司

Dates

Publication Date

20260512

Application Date

20260129

Claims (2)

1. 1. The high-speed expansion engineering rock high slope excavation construction method is characterized by comprising the following steps of: s101, building a construction channel along a mountain to be excavated; s201, transversely layering, longitudinally segmenting and tunneling in steps to form a plurality of layers of slope work tables, wherein the slope work tables comprise slope slopes and protection platforms; s301, installing a slope protection device on the protection platform along with the slope protection device; s401, performing protection grid construction on the slope surface of the slope; S501, circularly operating, and repeating the steps S201-S401 until the excavation construction of all rock high slopes is completed; the side slope protection device comprises a fixed support, a protective net and a reinforcing pull rope, wherein the fixed support is fixedly arranged on the protection platform, the protective net is connected with the two fixed supports, one end of the reinforcing pull rope is fixedly connected with the fixed supports, and the other end of the reinforcing pull rope is embedded into the side slope worktable surface; The fixing support comprises a fixing base and a protective net vertical rod, the fixing base is fixedly arranged on the protective platform, the protective net vertical rod is arranged on the fixing base and used for installing the protective net, and the reinforcing pull rope is fixedly connected to the middle upper part of the protective net vertical rod; the protection net upright rod is hinged with the fixed base, and an elastic buffer piece is arranged between the protection net upright rod and the fixed base; The fixed base is also provided with a rope locking mechanism, and the reinforcing pull rope bypasses the rope locking mechanism and is fixedly connected with the protection net upright rod; The rope locking mechanism comprises an opening and closing rod and a connecting rod driving mechanism, wherein one end of the connecting rod driving mechanism is connected with the protecting net vertical rod, the other end of the connecting rod driving mechanism is connected with the opening and closing rod, and the connecting rod driving mechanism is driven by the rotation of the protecting net vertical rod to drive the opening and closing rod to act, so that the locking or releasing function of the reinforcing pull rope is realized.
2. 2. The method according to claim 1, wherein the step S301 includes providing a rope groove on the protection platform, the rope groove straddling the protection platform, and the reinforcing rope is disposed in the rope groove.

Description

High-speed extension engineering rock high slope excavation construction method Technical Field The invention relates to the technical field of road and bridge construction, in particular to a rock high slope excavation construction method for high-speed extension engineering. Background Along with the gradual transition from encryption to capacity expansion of expressway networks in China, the projects of upgrading the expressway with four lanes into six lanes and eight lanes are increased year by year. The capacity expansion mode mainly adopts single-side or double-side widening, and a large amount of rock high slope excavation operation cannot be avoided. The slope has the characteristics of 'one high, two steep, three near and four tight', namely the slope height is more than or equal to 30m, the local part is more than 60m, the natural slope angle is 45-65 degrees, the design excavation slope angle is 50-75 degrees, the horizontal distance between the slope foot and the existing high-speed traffic lane is only 15-40 m, construction vibration, flywheels and rolling stones directly threaten operation safety, the construction period is tight, the site is tight, the environmental protection index is tight, and 'side traffic and side construction' are required. The traditional rock cutting excavation method mainly adopts a serial mode of 'full-section blasting from top to bottom, secondary transportation, temporary soil piling and protection follow-up', and has the outstanding defects that blasting shock waves, flying stones, rolling stones and vibration speeds are difficult to control within the related construction technical specification requirements, frequent road sealing is required for operation at high speed, passing efficiency is reduced by more than 30%, social negative effects are large, the protection level of traditional color steel enclosures, bamboo bars and nylon nets is low, the protection level is extremely easy to break down by flying stones, repeated replacement is required, downtime is 0.5-1 d caused by single replacement, and accumulated construction period is delayed. Aiming at the problems, the improved technologies such as longitudinal segmentation, a step method, non-blasting hydraulic crushing, excavation and supporting are generated in recent years, the technology still stays on a single process optimization level, a systematic solution of efficient excavation, instant protection and operation safety is not formed yet, and the technology is blank in the aspects of integration of transverse layering, longitudinal segmentation, step tunneling and foundation reinforcement type temporary protection. Therefore, a safe and efficient excavation construction method suitable for the high-speed extension engineering rock high slope is needed. Disclosure of Invention The invention provides a high-speed expansion engineering rock high-slope excavation construction method aiming at the problems, which comprises the following steps: s101, building a construction channel along a mountain to be excavated; s201, transversely layering, longitudinally segmenting and tunneling in steps to form a plurality of layers of slope work tables, wherein the slope work tables comprise slope slopes and protection platforms; s301, installing a slope protection device on the protection platform along with the slope protection device; s401, performing protection grid construction on the slope surface of the slope; S501, circularly operating, and repeating the steps S201-S401 until the excavation construction of all rock high slopes is completed. As a further explanation of the invention, the slope protection device comprises a fixed support, a protection net and a reinforcing pull rope, wherein the fixed support is fixedly arranged on the protection platform, the protection net is connected with the two fixed supports, one end of the reinforcing pull rope is fixedly connected with the fixed supports, and the other end of the reinforcing pull rope is embedded into the slope working table surface. Further, in step S301, a rope groove is formed in the protection platform, the rope groove spans across the protection platform, and the reinforcing rope is disposed in the rope groove. Still further, the fixed bolster includes unable adjustment base and protection network pole setting, unable adjustment base fixed mounting in on the protection platform, the protection network pole setting sets up be used for installing on the unable adjustment base the protection network, consolidate the stay cord connection and be fixed in the well upper portion of protection network pole setting. Furthermore, the protection net upright rod is hinged with the fixed base, and an elastic buffer piece is arranged between the protection net upright rod and the fixed base. Furthermore, the fixed base is also provided with a rope locking mechanism, and the reinforcing pull rope bypasses the rope locking mechanism and is fixedly connected with