A deep anchoring system for main cable steep slope of a cable-stayed bridge across a deep canyon

Abstract

The application discloses a deep anchoring system for main cable steep slope of a cable-stayed bridge across a deep-cut canyon, characterized in that the deep anchoring system for the main cable steep slope comprises a core component disc beam anchor, a cable dispersion steering body (or a cable dispersion body), a main cable, a cable strand group, a main passage of a de-anchoring chamber, an inclined passage of a cable strand chamber, a cable strand passage and a main cable passage. The disc beam anchor is increased in width (the width of the anchoring sides and the upper side, i.e. the width of the left and right sides and the upper and lower sides of the anchoring chamber is larger than that of the cable strand passage) and the depth of the anchoring chamber is determined according to the anchoring force, and the shape can be round, square or rhombic. The application is based on the idea of constructing a suspension bridge on a steep bank slope of a deep-cut canyon, removing the current spectacular and towering cable tower and removing the current giant tunnel anchor plug body, and adopting the deep anchoring system for the main cable steep slope.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of anchoring construction of super large suspension bridges, in particular to a deep anchoring system for main cable steep slope of super large suspension bridges across deep gorges without pylon. BACKGROUND

[0002] High mountain gorges have gradually become the main battlefield of traffic construction due to the extension of high-speed rail and highway networks. Suspension bridges have become the only choice for crossing deep gorges, and their number has been growing rapidly. Balancing the tension of the main cable is the core of the design of suspension bridges across deep gorges, and the anchoring structure at the end of the main cable is also the main and controlling engineering of the suspension bridge. At present, the anchoring methods of the two ends of the main cable of the suspension bridge are ground anchor and self-anchor, and the vast majority are ground anchors. Ground anchors are divided into gravity type and tunnel type. Tunnel type is a method in which the main cable crosses the pylon and is connected to the anchor plug body, the anchor plug body is built-in the tunnel of the mountain, and the combined force of the axial gravity component, friction force and embedding force of the anchor plug body is transmitted to the mountain to balance the tension of the main cable and support the pylon. The larger the anchoring cable force is, the larger the anchor plug body and the tunnel containing and installing it are, and the steeper the axis is.

[0003] For a suspension bridge with a main span of 1200m, the cross section of the anchorage tunnel behind the anchorage may even reach 500m 2 , the axis is nearly 100m long, the inclination is 45°, the maximum inclination reaches 53°, the minimum distance between the left and right anchor chambers is nearly 10m, and the excavated earthwork reaches 20,000m 3 . The height of the pylon reaches nearly 243.5m. At present, the highest pylon reaches 350m. Tunnel type anchorage and pylon on steep slope have complex structure, strong professional and technical nature, large volume, high construction cost, serious geological disaster threat, large wind field disturbance, strong system flexibility requirement, large tension, complex and delicate process, long periodicity, and difficult operation site. Therefore, a new balancing anchoring cable force structure is urgently needed, and a deep anchoring system for main cable steep slope of super large suspension bridges across deep gorges without pylon is invented to meet the needs.

[0004] Characteristics and defects of existing super large suspension bridge main cable anchoring:

[0005] 1. The slope body of the anchorage tunnel portal is more prone to damage, affecting the safety of the suspension bridge structure. Like ordinary highway tunnels, the anchorage tunnel portal is composed of side slope, inverted slope, flood control ditch, guide wall and sleeve arch, but the cross section is close to the city gate type and deviates from the circular shape, and the size is also very large, which is more prone to deep unloading cracks, and surface disturbance is also more prone to disaster.

[0006] 2. The anchorage tunnel gradually changes along the axis, different cross sections, different profiles, and presents a steep and irregular inverted horn shape, the structure is complex, non-standard, and the cost is higher. The size and process parameters of the support lining of each cross section gradually change, and the construction difficulty is not only complicated but also difficult.

[0007] 3. Anchorage tunnels have a much larger cross-section than highway tunnels, making the surrounding rock more prone to instability and failure, significantly increasing construction costs. The subsequent anchorage chamber is even 4-5 times larger, with an area exceeding 500m². 2 An increase in the exposed area will lead to a relative decrease in the stability and stiffness of the surrounding rock, and may even result in collapse, roof fall, or side collapse. This necessitates strengthening advanced support, systematic anchoring, strict control of blasting vibration, and real-time on-site adjustment of parameters.

[0008] 4. The tunnel axis is steeply inclined, even greater than 45°, with the lower edge reaching as steep as 53°, which inevitably leads to high costs and difficulty in ensuring quality. Steeply inclined tunnels present significant challenges in drilling and blasting, loading and unloading of blasting materials, support lining, equipment protection, anchorage pouring, and transportation of large equipment. The processes are complex, procedures are cumbersome, and the quality of the project is difficult to guarantee, resulting in higher costs and lower efficiency.

[0009] 5. The central rock pillar is prone to plasticization and failure. The distance between the left and right anchor chambers is much smaller than the minimum clearance. The central rock pillar itself is prone to fatigue, plasticization, or damage due to disturbance, which can lead to instability and collapse of the anchorage tunnel. Otherwise, reinforcement is necessary.

[0010] 6. Cable towers built on steep slopes in deep canyons are the core load-bearing components of suspension bridges, resulting in high costs and safety risks. Poor foundation conditions, complex wind fields, tall towers, large bending moments, and significant deflection at the tower tip all contribute to high safety risks. Their large size, complex structure, and high level of technical expertise inevitably lead to exorbitant costs.

[0011] 7. Cable towers and anchor tunnels on steep slopes in deep canyons require more land and are not easy to install, making them environmentally unfriendly and more likely to damage the ecosystem.

[0012] With the emergence of new technologies, processes, and materials, tunnel-type anchorages and towers located on steep slopes in deep canyons are gradually losing their advantages. This will inevitably lead to the development of main cable anchorage systems that are low-cost, simple in structure, environmentally friendly, safe, green, practical, easy to maintain, and have simple construction processes and fewer procedures. The invention of a deep anchorage system for the main cable of a super-large suspension bridge across a deep canyon on a steep slope is just right. Summary of the Invention

[0013] Therefore, to address the aforementioned shortcomings, this invention provides a deep anchoring system for the main cable of a large suspension bridge spanning a deep canyon on a steep slope. Based on the concept of constructing suspension bridges on steep slopes of deep canyons, this invention eliminates the currently used imposing and towering pylons and the existing giant tunnel anchor blocks, and adopts a deep, flat-beam anchoring system for steep slopes.

[0014] This invention is implemented as follows: a deep anchoring system for the main cable of a super-large suspension bridge across a deep canyon on a steep slope is constructed. The system is characterized by having a core component, a beam anchor, a cable deflector (or cable body), a main cable, a cable strand group, a main channel to the anchoring chamber, an inclined channel to the cable strand chamber, a cable strand channel, and a main cable channel.

[0015] The steep slope deep anchoring system for the main cable of a large suspension bridge across a deep-cut gorge without towers according to the present application is characterized in that the width of the anchor side of the disc beam anchor is increased, the width of the anchoring chamber on both sides and upward is increased, the depth of the anchoring chamber is determined by the anchoring force, and the shape can be round, square, or rhombic.

[0016] The steep slope deep anchoring system for the main cable of a large suspension bridge across a deep-cut gorge without towers according to the present application is characterized in that the disc beam anchor is placed against the surrounding rock mass of the cable chamber and plays the role of a beam to directly transmit the cable tension to the rock mass, and at the same time, a small part of the force is transmitted to the surrounding rock mass through the anchor rod.

[0017] The steep slope deep anchoring system for the main cable of a large suspension bridge across a deep-cut gorge without towers according to the present application is characterized in that the cable channel is an ultra-small cross-section tunnel with a round or gate-shaped outline, and the cross-section needs to meet the transportation conditions of the cable strand diverter, gradually decreases in the direction of the horizontal axis, and the lining support can be appropriately strengthened.

[0018] The steep slope deep anchoring system for the main cable of a large suspension bridge across a deep-cut gorge without towers according to the present application is characterized in that the main channel is a cable strand diverter component and a disc beam block material transportation and maintenance channel during operation, which is an ultra-small cross-section tunnel, and the line position is determined by the situation of the hole opening terrain, geological disasters, mountain geological structure, rock layer occurrence, lithology, and gushing water, the turning radius needs to be large, the lap needs to be smooth, and the line needs to be as short as possible, and the setting needs to be flexible.

[0019] The steep slope deep anchoring system of the main cable of a super large suspension bridge across a deep-cut canyon is characterized in that: the cable dispersion steering body (or cable dispersion body) chamber, the cable dispersion or steering body space, the foundation is ladder-shaped, and the ladder face is orthogonal to the resultant force of the main cable and the cable strand.

[0020] The steep slope deep anchoring system of the main cable of a super large suspension bridge across a deep-cut canyon is characterized in that: the main cable transmits the anchoring cable force across the cable dispersion steering body (cable dispersion body) to the deck beam.

[0021] The steep slope deep anchoring system of the main cable of a super large suspension bridge across a deep-cut canyon is characterized in that: the main cable channel, the main cable is directly drilled into the mountain channel without contacting the mountain through the cable tower; the main cable channel can be circular or horseshoe-shaped, and the circular shape can be formed by drilling or blasting; the horseshoe-shaped blasting tunnel is excavated; the circular hole is formed by first drilling a small hole from top to bottom and then installing a reverse drilling head to enlarge it; the small hole is obliquely intersected with the soft and hard contact surface or the broken zone, and the solution chamber, in order to avoid drilling deviation, the drilling process should be light pressure and slow rotation, and the length should be greater than 10 cm, and the pressure should not be increased when the soft rock is converted to hard rock; the measurement cycle footage can be shortened, the infrared guidance can timely find the drilling deviation, and the bending depth, deviation direction and inclination size are determined to correct the drilling line position in time; if the drilling hole has appeared on the ground, a diamond bead return type rope saw machine can be used for correction, or a diameter 2m channel can be chiseled along the line position; the horseshoe-shaped blasting tunnel is excavated to form a channel; the size of the cross section is determined by the main cable cross section and the supporting lining.

[0022] The steep slope deep anchoring system of the main cable of a super large suspension bridge across a deep-cut canyon is characterized in that: the main cable inlet section is an open outline city gate-shaped horizontal chamber, which is convenient for main cable installation, maintenance and repair, and can reinforce the steep slope of the ground surface to avoid geological disasters.

[0023] The steep slope deep anchoring system of the main cable of a super large suspension bridge across a deep-cut canyon is characterized in that: the main cable channel can be reinforced with steel fiber reinforced concrete, which can ensure waterproof, dustproof and ventilation.

[0024] The present application has the following advantages: the present application is based on the concept of building a suspension bridge on a steep and steep canyon slope, removing the current magnificent and towering cable tower, and removing the current giant tunnel anchor plug body, and adopting a steep slope deep deck beam anchoring system, which has the following characteristics and advantages in structure and construction:

[0025] 1. The steep slope deep deck beam anchoring system is much smaller than the tunnel anchor plug body anchoring system, and the structure is simple, so that the suspension bridge without cable tower and tunnel type anchorage has simple structure, better mechanical properties, better flexibility, stronger stability, larger bridge swing amplitude, and relatively lower engineering cost;

[0026] 2. The main passage of the disc beam anchorage chamber can be used as a construction passage, a permanent maintenance passage, a drainage and seepage system, and a ventilation system. The tunnel type anchorage system needs to be constructed separately.

[0027] 3. The steep slope deep disc beam anchoring system does not need to damage or occupy a large area of the surface, is more friendly to the ecological environment, and does not need to worry about the threat of geological disasters to the tower;

[0028] 4. The steep slope deep disc beam anchoring system does not need a middle rock pillar, does not need to worry about the plastic damage of the middle rock pillar in the small clear distance of the anchorage tunnel, and does not need to worry about blasting damage. It has higher safety and more reliable quality.

[0029] 5. The main passage line, contour, and section of the steep slope deep disc beam anchoring system are flexible.

[0030] 6. The steep slope deep disc beam anchoring system is easy to adapt to steep and steep bank slopes in deep and narrow valleys, which is beneficial to the promotion of western transportation.

[0031] 7. The steep slope deep disc beam anchoring system of the main cable of the tower does not need to build a tower, a tunnel type anchorage access, and a working platform during construction. It does not need to drill and blast excavation cars, secondary lining support cars, and large-scale material transportation vehicles. It does not need to lift large-scale excavation equipment for each blasting. The construction is simple and safe, and the quality is more reliable. BRIEF DESCRIPTION OF DRAWINGS

[0032] Figure 1A 、 1B 、1C is a side view of a traditional tower on a steep slope, a vertical tunnel anchor, and a horizontal cross-sectional view.

[0033] Figure 2 A steep slope deep anchoring system of the main cable of the tower is shown in the figure.

[0034] Figure 2A A steep slope deep anchoring system of the main cable of the tower is shown in the figure.

[0035] Figure 3 A steep slope deep anchoring system of the main cable of the tower is shown in the figure.

[0036] Figure 3A A steep slope deep anchoring system of the main cable of the tower is shown in the figure.

[0037] Figure 4 The horizontal projection of the anchoring system is shown in the figure.

[0038] Figure 5 A disc beam anchor schematic network diagram is shown in the figure. DETAILED DESCRIPTION

[0039] The following will be combined with the drawings 1- Figure 5The present application is described in detail, and the technical solutions in the embodiments of the present application are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0040] The present application provides a deep anchoring system for the main cable of a suspension bridge across a deep canyon, which is improved as follows:

[0041] The stress core component is a disc beam anchor.

[0042] A new concept is proposed for building a suspension bridge in a deep canyon, which removes the current magnificent and spectacular tower on the steep bank slope, and instead, the main cable directly penetrates into the mountain, and the anchor plug body with a huge volume in the main cable anchoring section is also removed (see FIG. 1). For this purpose, a new technology has given birth to a disc beam anchor with a very small volume as the core of the main cable anchoring system. For a suspension bridge with a span of 1200m, the anchoring cable force is 8x10 9 N, and the disc beam has a circumference of nearly 33m, which is the same as the cross-sectional area of a large-section tunnel. As long as the surrounding rock is grouted and the shear strength of the surrounding rock is improved, the stress package is eliminated, and only a horizontal burial depth of <60m is required. The structure is simple, the mechanical properties of the suspension bridge are better due to the removal of the tower, the flexibility is better, the stability is stronger, and the lateral swing amplitude is larger. The original stress core component is converted to a disc beam anchor, and the cable tension is directly transferred to the rock mass by the disc beam anchor. The disc beam anchor forms a main cable anchoring force with the ground support force of the cable diversion body (or the cable body) and the tension diversion body. Figure 3 Or Figure 3A ).

[0043] The structure of the disc beam anchor anchoring system in the deep slope will be described in detail below:

[0044] The disc beam anchor anchoring system in the deep slope is composed of a core component disc beam anchor, a cable diversion body (or a cable body), a main cable, a cable group, a main passage of the anchoring chamber, and an inclined passage of the cable chamber (see Figure 4 ).

[0045] When the main passage is near the disc beam anchor chamber, the disc beam anchor is increased in width on both sides, the width of the anchoring chamber is increased in both lateral and upward directions (the width of the anchoring chamber on both sides and upward is larger than the cross-sectional area of the cable passage), the depth of the anchoring chamber is determined by the anchoring force, and the shape can be circular, square, or rhombus, as shown in Figure 3 Or Figure 3A , Figure 4 cross-sectional view.

[0046] Disc beam anchor, which is anchored on the surrounding rock of cable chamber, plays the role of beam, and transmits the cable tension to the rock mass directly, while a small part of force is transmitted to the surrounding rock through the anchor rod. Disc beam anchor is a thick and large high-grade reinforced concrete block, in which small steel grid is placed on the side of the cable diversion body (cable diversion body), and is connected with the steel reinforcement and anchor rod. Corrugated pipe is embedded in each cable direction, and steel sleeve pipe is placed inside. Thick steel plate is embedded in the side block of the main channel, and anchor pad is set (see Figure 3 or Figure 3A 、 Figure 5 )。

[0047] Cable channel, ultra-small cross-section tunnel, outline can be round, can be horseshoe-shaped, cross-section needs to meet the cable diversion body (cable diversion body) transportation conditions, gradually decreases along the horizontal axis of the cable diversion body (cable diversion body) direction, and the lining support can be appropriately strengthened. The length is indefinite, and the smaller the better, which is negatively related to the strength of disc beam anchor (see Figure 2 )。

[0048] The main channel is the cable diversion body (or cable diversion body) component, disc beam block material transportation, and maintenance channel during operation, which is an ultra-small cross-section tunnel. Its line position is determined by the situation of cave opening terrain, geological disasters, mountain geological structure, rock occurrence, lithology, gushing water, etc. The turning radius should be large, the connection should be smooth, and the line should be as short as possible. Its setting is flexible. The size of its cross-section depends on the maximum size characteristics of the cable diversion body (or cable diversion body) component basic unit along the axis to the transverse direction and the construction requirements. Its outline can be round or horseshoe-shaped. Its slope is 0.1-0.3%. Its excavation can adopt smooth vibration control blasting method, small tunnel boring machine method, or other excavation methods. When encountering broken surrounding rock, it can adopt net spraying support or other support methods. Its transportation method can adopt light rail flat transportation driven by battery. Its drainage adopts self-flowing to ensure permanent drainage of anchor system. Its ventilation method adopts forced ventilation during construction period, and natural ventilation during operation period.

[0049] Cable diversion body (or cable diversion body), which is the same as ordinary tunnel type cable saddle.

[0050] Cable diversion body (or cable diversion body) chamber, cable or diversion body space, foundation in ladder shape, ladder surface orthogonal to the resultant force of main cable and cable.

[0051] Main cable, which transmits the anchoring cable force across the cable diversion body (cable diversion body) to the disc beam.

[0052] The main cable channel is directly drilled into the mountain channel without crossing the cable tower and non-contacting mountain, the main cable channel is circular or horse-shoe shaped, the circular hole is formed by drilling or blasting, and the horse-shoe shaped hole is formed by blasting, the circular hole is formed by drilling a small hole from top to bottom first, and then installing a reverse well drilling head to enlarge the hole, the small hole is obliquely crossed with soft and hard contact surfaces or broken zones and solution cavities, in order to avoid drilling deviation, the drilling process needs to be lightly pressed and slowly rotated, the length is ensured to be greater than 10 cm, and the pressure cannot be increased when the soft rock is turned into hard rock; the measurement cycle footage can be shortened, the infrared guidance can timely find the drilling deviation, and the bending depth, deviation direction and inclination size are determined, so that the drilling line position can be corrected in time by using a correction drilling head; if the hole has appeared on the ground, a diamond bead reciprocating rope saw machine can be used for correction, or a 2m diameter channel can be chiseled along the line position.

[0053] The main cable inlet section is an open profile city gate shaped horizontal chamber, which is convenient for the installation, maintenance and repair of the main cable, and can reinforce the steep slope of the ground surface to avoid geological disasters.

[0054] The main cable channel can be supported by reinforced fiber concrete injection molding to ensure waterproof, dustproof and ventilation.

[0055] The deep anchoring system of the main cable of the large suspension bridge across the deep-cut canyon without the cable tower has the following characteristics and advantages:

[0056] The present application is based on the construction of a suspension bridge on a steep and steep bank slope of a deep-cut canyon, removing the current spectacular and towering cable tower and the current giant tunnel anchor plug body, adopting a steep deep beam anchor anchoring system, which has the following characteristics and advantages in structure and construction:

[0057] 1. The steep deep beam anchor anchoring system is much smaller than the tunnel anchor plug body anchoring system, and the structure is simple, so that the suspension bridge without the cable tower and the tunnel type anchorage has a simple structure, better mechanical properties, better flexibility, stronger stability, allows larger bridge swing, and the engineering cost is relatively greatly reduced;

[0058] 2. The main channel of the beam anchor chamber can be used as a construction channel, a permanent maintenance channel, and a drainage, seepage system and ventilation system, while the tunnel type anchorage system needs to be separately constructed;

[0059] 3. The steep deep beam anchor anchoring system does not need to damage or occupy a large area of the ground surface, and is more friendly to the ecological environment, and does not need to worry about the threat of geological disasters to the cable tower;

[0060] 4. The steep deep beam anchor anchoring system does not need a middle rock column, and does not need to worry about the plastic damage of the middle rock column with a small net distance in the anchorage tunnel, and the blasting damage, so that the safety is higher and the quality is more reliable;

[0061] 5. The main channel line position, profile and section of the steep deep beam anchor anchoring system are flexible;

[0062] 6. The steep slope deep deck beam anchor anchoring system is easy to adapt to steep bank slopes in deep-cut gorges, which is conducive to the promotion of western transportation;

[0063] 7. The steep slope deep deck beam anchor anchoring system without cable tower main cable does not need to build cable tower, tunnel type anchor road and operation platform, does not need to drill and blast excavation trolley, second lining support trolley, does not need large-scale spoil vehicle, and does not need to lift large-scale excavation equipment for each blasting, which is simple, safe and reliable in construction.

[0064] Therefore, the deep anchor system of the main cable of the extra-large suspension bridge across the deep-cut gorge without cable tower is novel in concept, strong in innovation, simple in structure, excellent in suspension bridge mechanics, strong in flexibility, good in stability, large in swing amplitude, more adaptable to steep bank slopes in deep-cut gorges, more helpful for the westward extension of high-speed rail and highway networks, simple in construction, friendly to ecological environment, and low in engineering cost.

[0065] The above description of disclosed embodiments enables those skilled in the art to carry out or use the present application. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the present application. Therefore, the present application will not be limited to these embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A system for anchoring a main cable of a suspension bridge across a deep gorge without towers, characterized in that, The steep slope deep disc beam anchor anchoring system has a core component disc beam anchor, a cable dispersion steering body, a main cable, a cable strand group, a de-anchoring chamber main passage, a de-cable strand chamber inclined passage, a cable strand passage, and a main cable passage; The disc beam anchor is laterally increased and the width is increased when the main passage is close to the disc beam anchor chamber, and the anchoring chamber depth is determined by the anchoring force size, and the shape is circular or square or rhombic; The disc beam anchor is against the surrounding rock mass of the cable strand chamber and plays the role of a beam to directly transmit the cable strand tension to the rock mass, and at the same time transmits a small part of the force to the surrounding rock mass through the anchor rod; the disc beam anchor is a thick and large high-grade reinforced concrete block, a small size steel grid is arranged in the block on the side of the cable dispersion steering body, and is connected with the steel reinforcement cage and the anchor rod; a corrugated pipe is embedded in the direction of each cable strand, a steel sleeve pipe is arranged inside, a relatively thick steel plate perpendicular to the cable strand is embedded in the block on the side of the main passage, and an anchor pad is arranged; The main passage is a cable dispersion steering body component, a disc beam block material transportation, and a maintenance passage during operation, and is an extremely small cross-section tunnel, and the line position is determined by the hole opening terrain, geological disasters, mountain geological structure, rock layer occurrence, rock properties, and gushing water conditions, the turning radius is large, the lap is smooth, and the line is as short as possible, and the setting is flexible; The cross-section size depends on the maximum size characteristic of the cable dispersion steering body component basic unit from the axial direction to the transverse direction and the construction requirement; the outline is circular or gate shape; the slope is 0.1-0.3%; the excavation is in the mode of smooth surface vibration control blasting or in the mode of small tunnel boring machine; when broken surrounding rock is encountered, the hanging net and shotcrete support or other support modes are adopted; The transportation mode adopts light rail flat transportation driven by a storage battery; the drainage is in a self-flowing mode to ensure permanent drainage of the anchorage system; and the ventilation mode is in a forced ventilation mode during construction and in a natural ventilation mode during operation. The main cable passage is a passage drilled into the mountain without crossing the cable tower and without contacting the mountain; the main cable passage has a circular or horseshoe shape, and the circular shape is formed by drilling or smooth blasting, and the horseshoe shape is formed by smooth blasting; the circular hole is formed in one scheme, that is, a small hole is drilled from top to bottom first, and then a reverse well drilling head is installed to enlarge the hole; the small hole is inclined to the soft and hard contact surface or the broken zone or the solution chamber, in order to avoid drilling deviation, the drilling process is light pressure and slow rotation, the length is ensured to be greater than 10 cm, and the pressure cannot be increased when the soft rock is changed to hard rock; the measurement cycle footage is shortened, the infrared guidance is used to find the drilling deviation in time, the bending depth, the deflection direction and the inclination size are determined, so that the deviation correction drilling head is used to correct the drilling line position in time; if the drilling hole has reached the ground surface, a diamond bead reciprocating rope saw machine is used for correction, or a diameter 2m passage is chiseled along the line position; the horseshoe shape smooth blasting is excavated into a passage, and the cross-section size is determined by the main cable cross-section and the support lining.

2. The steep slope deep anchorage system for the main cable of the super long-span suspension bridge across the deep-cut gorge without the pylon, according to claim 1, characterized in that, The cable strand passage is an extremely small cross-section tunnel, and the outline is circular or gate shape, and the cross-section needs to meet the cable strand cable dispersion steering body transportation condition, and gradually becomes smaller along the horizontal axis cable dispersion steering body direction, and the lining support is appropriately strengthened; the length is indefinite, and is as small as possible, and the strength is negatively related to the disc beam anchor.

3. The steep slope deep anchorage system for the main cable of a suspension bridge across a deep canyon without towers according to claim 1, characterized in that, The cable dispersion steering body chamber has a ladder-shaped foundation, and the ladder face is orthogonal to the main cable and the cable strand resultant force.

4. The steep slope deep anchorage system for the main cable of a suspension bridge across a deep canyon without towers according to claim 1, characterized in that, The main cable transmits the anchoring cable force across the cable dispersion steering body to the disc beam.

5. The steep slope deep anchorage system for the main cable without towers for the super long span suspension bridge across the deep gorge according to claim 1, characterized in that, The main cable inlet section is an open outline gate-shaped horizontal chamber, which is convenient for main cable installation, maintenance and maintenance, and at the same time, the steep slope of the ground surface is reinforced to avoid geological disasters.

6. The steep slope deep anchorage system for the main cable without towers for the super long span suspension bridge across the deep gorge according to claim 1, characterized in that, The main cable channel is reinforced fiber concrete formwork support, which ensures waterproof, dustproof and ventilation.

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