CN-121976806-A - Integrated lining prefabricated assembly comprehensive construction method for tunnel bottom kilometer detection and drilling and blasting equipment of small section tunnel of plateau railway

Abstract

The invention relates to an integrated lining prefabrication assembly comprehensive construction method for tunnel bottom kilometers detection and drilling and explosion equipment of a small section tunnel of a plateau railway, which comprises the following steps of tunnel bottom exceeding front kilometer detection operation, drilling and explosion supporting multifunctional integrated operation, secondary lining prefabrication assembly operation and deep buried ditch pipe joint pushing operation; the method sequentially realizes kilometer advanced geological forecast, pressure relief drainage, small-section drilling and blasting equipment integrated construction, full-ring prefabricated lining assembly construction and deep-buried ditch pushing arrangement, and forms overall process integrated construction.

Inventors

• LIANG YU
• GAO BIN
• HU BIN
• LIU HAITAO
• SHAO QI
• QUAN WEI
• YI LINGBING
• XU YONGPENG
• SUN RUIJIE
• GUAN HAIBO
• WANG LONG
• WANG JUN
• CHEN QINGHUAI
• LIU BAOXU
• ZHANG SHIPU
• ZHANG QIANG
• NING JICHAO
• LIU YAO
• NIE SHANJUN

Assignees

• 中国交通建设股份有限公司轨道交通分公司

Dates

Publication Date

20260505

Application Date

20260316

Claims (6)

1. 1. The integrated lining prefabrication and assembly comprehensive construction method for the tunnel bottom kilometer detection and drilling and blasting equipment of the small section tunnel of the plateau railway is characterized by comprising the steps of kilometer detection operation before tunnel bottom, drilling and blasting support multifunctional integration operation, secondary lining prefabrication and assembly operation and deep buried ditch pipe joint pushing operation, and the method sequentially realizes kilometer advanced geological prediction and pressure relief drainage, integrated construction of the small section drilling and blasting equipment, full-ring prefabrication lining assembly construction and deep buried ditch pushing arrangement, so that whole-process integrated construction is formed.
2. 2. The construction method according to claim 1, wherein the tunnel bottom super front kilometer detection operation sequentially comprises the steps of: the method comprises the steps of constructing a transverse tunnel by adopting a drilling and blasting method to assist in a tunnel to an intersection of a positive tunnel, digging down to the elevation of the bottom of a deep buried central ditch of the tunnel, and providing an operation reference for subsequent detection operation; Adopting a kilometer directional drilling machine to drill an advanced drilling hole along a positive line at the elevation of a tunnel bottom deep buried ditch, wherein the initial aperture of the advanced drilling hole is 220-260 mm, the design distance between two transverse holes is 5500-6500 m, the construction is carried out by adopting a mode that the two transverse holes are simultaneously oppositely drilled towards the center, and the single drilling operation length is 1500-1700 m; The kilometer directional drilling while drilling is used for carrying out advanced geological forecast, one or more technologies of television imaging, geological radar, transient electromagnetic, wave velocity logging and three-dimensional laser scanning are adopted to detect geological conditions in the range of 1000-1500 m in front of the tunnel face of the tunnel main line, and advanced pressure relief and drainage are realized; And drilling a drill hole to a preset operation length, then performing drilling hole reaming operation, and performing three-stage reaming mode, wherein each stage of reaming is 180-220 mm, and finally reaming is 820-860 mm to match with the design outer diameter of the prefabricated drain pipe, wherein the thickness of a cover rock stratum with the elevation of the center point of the tunnel bottom deep buried ditch from the rail surface is not less than 4000m, and advanced drilling and reaming operation and positive line drilling and blasting excavation are performed synchronously, so that normal construction of a positive line is not influenced.
3. 3. The method of construction according to claim 1, wherein the drilling and blasting support multifunctional integrated operations include arch wall drilling and blasting support and inverted arch drilling and blasting support and mating operations, comprising the steps of: The multifunctional tunnel operation trolley integrates the core functions of a three-arm rock drilling trolley, an anchoring and grouting integrated trolley, an arch frame installation trolley and a charging rack, and sequentially completes rock drilling, charging blasting, arch wall primary support arch frame installation, foot locking anchor rod and advanced small guide pipe setting and steel arch frame locking operation of a tunnel front arch wall; The arch wall drilling and blasting support is 2.5m-3m in length per cycle, the arch wall drilling and blasting support immediately follows the arch wall drilling and blasting support operation below the hydraulic inverted arch stack bridge, and the arch wall drilling and blasting support is sequentially closed into a ring, the tunnel bottom annular drainage blind pipe is installed, the inverted arch short side wall longitudinal drainage blind pipe is installed, and the tunnel bottom waterproof board is paved and hung, so that the primary support is timely closed into a ring.
4. 4. The construction method according to claim 1, wherein the secondary lining prefabricated assembly work follows the primary support work, the secondary lining is a full-ring prefabricated assembly structure, the full ring is divided into 6 blocks, and the full-process work is completed by adopting a door type assembly trolley, and the construction method specifically comprises the following steps: the door type assembling trolley is of a multifunctional integrated design, and has the functions of assembling an inverted arch precast block, constructing an arch wall to prevent water drainage and assembling the arch wall precast block; Firstly, carrying out bottom detection leveling on a tunnel bottom, lifting and assembling an inverted arch precast block by a door-type assembling trolley, wherein the inverted arch precast block is of a whole hollowed-out design, has the width of 1800-2200 mm and is longitudinally connected by bolts; After the inverted arch precast block is assembled, installing an arch wall circumferential drainage blind pipe and paving and hanging arch wall waterproof boards by adopting a door type assembling trolley, and connecting the blind pipe and the waterproof boards by adopting a hot melting or welding process; The door type assembling trolley retreats to assemble an arch wall precast block, wherein the width of the arch wall precast block is 1800-2200 mm, the arch wall precast block is divided into 5 blocks, A/B ring segments are arranged, a staggered joint assembling mode is adopted, and the ring joints are connected by bolts; and after the secondary lining operation is carried out to 180-220 m, the prefabricated component installation operation of the ditch cable groove is carried out, so that the cross interference among the working procedures is avoided.
5. 5. The method of construction according to claim 1, wherein the pushing operation of the deep buried drain pipe joint uses a counterbore formed by the tunneling bottom exceeding the front kilometer detection operation as a pilot hole, and specifically comprises the steps of: The kilometer directional drilling machine finishes single 1500m-1700m drilling and reaming operation and then transits, the operation space is used as a jacking working chamber to construct a jacking counter-force wall, a jacking machine is adopted to perform pushing operation of prefabricated drainage pipe joints, the prefabricated drainage pipe joints are connected by adopting socket joints, the front end of the jacking machine lags behind an arch wall by at least 20m, and the two sides of the counter-force wall are simultaneously and symmetrically pushed; Digging a temporary cavity on a single side of the tunnel as a kilometer directional drilling relay drilling working chamber after the working surface of the straight line of the tunnel is driven for 1200-1400 m along the slope, wherein the depth of the temporary cavity is slightly lower than the design depth of a deep buried central ditch; The tunnel main line is continuously tunneled, an inverted arch precast block for reserving an inspection wellhead is arranged at a drilling intersection, and the inspection well is shared with a drainage inspection well; after an inspection well mouth is reserved through an inverted arch block, the pipe jacking machine downwards performs an inspection well through the reserved well mouth on the premise of not influencing the upper operation working condition, and performs interface treatment of a well wall and a pipe joint; in the pushing process of the prefabricated drain pipe joint, a relay pipe joint is arranged every 900-1100 m, and the pushing friction resistance is reduced through a post grouting process of the relay pipe joint and the pipe joint wall; after the pushing operation is completed, the tunnel bottom annular blind pipe is connected to the prefabricated drain pipe joint through each inspection well, the full-package waterproof plate is closed, and the tunnel bottom deep-buried ditch operation is completed.
6. 6. A system for realizing the construction method according to any one of claims 1-5 is characterized by comprising a kilometer directional drilling machine, a tunnel multifunctional operation trolley, a hydraulic inverted arch trestle, a door-type assembly trolley, a pipe jacking machine, a relay pipe joint, a prefabricated drainage pipe joint, an inverted arch prefabricated block, an arch wall prefabricated block and a ditch cable duct prefabricated component, wherein the kilometer directional drilling machine is used for drilling an advanced drill hole, carrying out advanced geological prediction while drilling and drill hole reaming operation, the tunnel multifunctional operation trolley is used for completing the full-process operation of the arch wall drilling and explosion support and adapting to the operation requirement of a plateau small-section pipe jacking, the hydraulic inverted arch trestle is used for providing an operation space for the inverted arch drilling and explosion support and matched operation, guaranteeing the smoothness of a transportation channel, the door-type assembly trolley is used for completing the assembly of a secondary lining prefabricated block and the arch wall waterproof construction, the relay pipe joint is matched with the prefabricated drainage pipe joint operation, pushing friction resistance is reduced, and the prefabricated drainage pipe joint, the inverted arch prefabricated block, the ditch prefabricated wall prefabricated construction block and the ditch cable duct is used for realizing secondary prefabricated lining construction and deep-buried lining.

Description

Integrated lining prefabricated assembly comprehensive construction method for tunnel bottom kilometer detection and drilling and blasting equipment of small section tunnel of plateau railway Technical Field The invention relates to the technical field of tunnel construction, in particular to a comprehensive construction method of a small-section tunnel of a plateau railway, and particularly relates to an integrated lining prefabrication assembly comprehensive construction method of a tunnel bottom kilometer detection and drilling and explosion equipment of the small-section tunnel of the plateau railway. Background The construction of the plateau iron I-level single-line tunnel (the minimum effective clearance area above the rail surface is about 42m < 2>, the width is 6.3m, and the height is 7.1 m) belongs to a small-section tunnel, and the construction faces multiple challenges of narrow working space, severe high altitude environment, complex geological conditions (such as rock burst, large deformation, fault breaking belt and the like), large penetration difficulty of a deep buried ditch and the like, and the prior construction technology and the matched scheme have a plurality of defects, and are difficult to meet the construction requirements of high efficiency, safety and green, and the construction method is as follows: 1. The prior art and the shortfall of the advanced tunnel detection are provided. The mountain tunnel drilling and blasting method is mainly constructed by adopting a multifunctional geological drilling machine to drill in advance, and the tunneling process is assisted by infrared detection, geological radar, seismic wave reflection method and other means to forecast the geology of surrounding rock in front of the face. Although a comprehensive detection mode of cooperative operation of a plurality of means is formed, the method has the obvious defects that the effective detection distance is short, the advanced drilling is generally not more than 30-60m, the seismic reflection method is generally not more than 120m, the accuracy of data is greatly reduced during long-distance detection, meanwhile, the pressure relief and drainage effects by utilizing small exploratory holes are limited, the drainage amount is small, and the water pressure in front of a palm face and the poor geological risk are difficult to solve in advance. 2. The mechanized matching state and the shortage of the small-section tunnel drilling and blasting method are provided. At present, mechanized configuration of mountain tunnel drilling and blasting method construction reaches the full-process pedigree degree, and key technological processes such as excavation, support and lining operation can be covered, but adaptability to small-section tunnels on the plateau is poor. In addition, due to the influence of the ultra-high altitude complex environment conditions, the power output of the internal combustion engine of the mechanical equipment is reduced, the abrasion of parts is aggravated, and multiple adverse factors of poor ventilation and heat dissipation conditions and bad geology of a small-section tunnel are superposed, so that the overall construction efficiency is at a lower level. 3. The tunnel lining construction technology is in the current state and is not enough. At present, a reinforced concrete cast-in-situ operation method is still commonly used for constructing tunnel lining, and the main disadvantages of the method include complex working procedure, long cycle period, long time consumption for assembling, moving and positioning a template trolley, strong concrete curing time dependence, severe conditions, easy shrinkage cracking of concrete, general phenomenon of uncompacted vault pouring ("vault void"), difficult construction joint treatment, easy structural weak link, and adverse influence on the operation environment and personnel health caused by a large amount of dust and noise pollution generated in the construction process. 4. Tunnel deep buried ditch and inspection hole construction current situation and deficiency The traditional deep buried ditch operation mode is that before inverted arch construction, a simple trestle is utilized to construct a tunnel deep buried heat insulation ditch and an inverted arch primary support, the deep buried ditch immediately follows a face to perform synchronous blasting (or non-explosion) excavation, about every 6 meters is one section, foundation pouring, concrete drainage pipe joint installation, inverted filter backfill, inspection well construction and inverted arch primary support sealing and looping operation are sequentially performed after slag discharge. The method has the problems of narrow operation space, high hard rock excavation difficulty, complex procedure conversion of temporary support and the like, low construction efficiency of cross operation, high safety risk, long construction period and the like, and severely restricts the overal