Bridge and tunnel structure crossing canyon at cliff and construction method thereof
阅读说明：本技术 一种陡崖处跨峡谷的桥隧结构及其施工方法 (Bridge and tunnel structure crossing canyon at cliff and construction method thereof ) 是由 曹诗定 唐伟 黎雪云 周倩茹 于 2020-07-08 设计创作，主要内容包括：本发明提供了一种陡崖处跨峡谷的桥隧结构及其施工方法,其中,该桥隧结构包括主线隧道,主线隧道设置于峡谷两侧的山体内,主线隧道的峡谷段采用无主塔悬索桥跨越,无主塔悬索桥的两端分别顺接两侧山体内的所述主线隧道。本发明的桥隧结构取消了悬索桥主塔,利用山体进行锚固,工程造价低、景观效果好。同时,该桥隧结构的施工方法难度小,可实施性高,解决了陡崖处悬索桥跨越峡谷的难题。(The invention provides a bridge-tunnel structure crossing canyons at a scarp and a construction method thereof, wherein the bridge-tunnel structure comprises main line tunnels, the main line tunnels are arranged in mountains on two sides of the canyons, canyon sections of the main line tunnels are spanned by a main-tower-free suspension bridge, and two ends of the main-tower-free suspension bridge are respectively connected with the main line tunnels in the mountains on two sides in a following manner. The bridge and tunnel structure of the invention cancels the main tower of the suspension bridge, utilizes the mountain body to anchor, and has low construction cost and good landscape effect. Meanwhile, the construction method of the bridge-tunnel structure is low in difficulty and high in feasibility of implementation, and the problem that a suspension bridge at the cliff spans across canyons is solved.)
1. A bridge-tunnel structure for crossing canyons at a scarp comprises a main line tunnel and is characterized in that the main line tunnel is arranged in mountains on two sides of a canyon, a canyon section of the main line tunnel is crossed by a main-tower-free suspension bridge, and two ends of the main-tower-free suspension bridge are respectively connected with the main line tunnel in the mountains on two sides in a following mode.
2. The bridge and tunnel structure of claim 1, wherein the main-tower-free suspension bridge comprises main cables, slings, a main beam, a bridge deck structure and an anchoring tunnel, the main cable facade is in a catenary shape, the slings are suspended below the main cables at a certain interval, and the main beam and the bridge deck structure are hoisted; the anchoring tunnels are arranged above the main line tunnels in the mountain bodies on the two sides, and the end parts of the main cables are anchored into the anchoring tunnels.
3. The bridge-tunnel structure of claim 2, further comprising a main cable channel and a U-shaped tunnel, the longitudinal direction of the main cable channel being parallel to the longitudinal direction of the main tower-free suspension bridge, one end of the main cable channel being in communication with the anchoring tunnel and the other end being directed to the scarp; the main cable penetrates into the main cable channel, and the end part of the main cable is anchored into the anchoring tunnel; the anchoring tunnel is perpendicular to the longitudinal direction of the main line tunnel and the main cable, the anchoring tunnel is connected with the main line tunnel through the U-shaped tunnel arranged on the side, and the U-shaped tunnel is a construction and maintenance channel of the anchoring tunnel.
4. The bridge and tunnel structure of claim 3, wherein concrete is poured into the anchoring tunnel to form an anchor, and the ends of the main cables are dispersed and anchored into the anchor; an overhaul channel is reserved in the anchor ingot, and the U-shaped tunnel and each main cable channel are communicated through the overhaul channel.
5. The bridge and tunnel structure of claim 4, wherein a main cable saddle is embedded at one end of the main cable channel near the non-main tower suspension bridge, a cable scattering saddle is embedded at one end of the main cable channel near the anchoring tunnel, the main cable is connected into the main cable channel through the main cable saddle, and the main cable is diverged towards two sides through the cable scattering saddle to form a plurality of anchoring steel bundles to be anchored into the anchor rods.
6. A bridge and tunnel structure as claimed in claim 5, wherein the bottom rock mass of the main cable saddle is reinforced by anchor rods or anchor cables.
7. A bridge and tunnel structure as claimed in any one of claims 1 to 6, wherein the main line tunnel in the mountain bodies on both sides is constructed by a mining method, the main line tunnel is in a multi-arch tunnel type or an ultra-small clear distance tunnel type at the position where the non-main-tower suspension bridge is connected, and the non-main-tower suspension bridge is a full-width bridge to reduce construction cost.
8. A bridge and tunnel structure as claimed in any one of claims 3 to 6, wherein the U-shaped tunnel, the anchoring tunnel and the main cable channel are all of horseshoe cross section, and the U-shaped tunnel and the main cable channel are all of composite lining structure and mine construction.
9. A bridge and tunnel structure as claimed in any one of claims 3 to 6, wherein the U-shaped tunnel is provided with a fire-resistant roller shutter at the junction with the main line tunnel.
10. A construction method of a bridge and tunnel structure according to claim 6, comprising the steps of:
s1, constructing main line tunnels in the mountain bodies on two sides;
s2, constructing a U-shaped tunnel from the side of the main line tunnel to the upper part of the main line tunnel;
s3, constructing an anchoring tunnel which is above the main line tunnel and is vertical to the main line tunnel;
s4, constructing a main cable channel, and reinforcing a rock mass below the main cable saddle;
s5, mounting a main cable saddle and a scattered cable saddle;
s6, erecting a main cable;
s7, pouring and anchoring concrete in the tunnel;
s8, mounting a sling;
s9, constructing the girder by adopting a suspension splicing method or a suspension casting method;
and S10, mounting a bridge deck structure.
Technical Field
The invention relates to the technical field of bridges and tunnels, in particular to a bridge and tunnel structure crossing canyons at a cliff and a construction method thereof.
Background
With the continuous development of traffic in China, bridge and tunnel engineering under various complex conditions is emerging continuously. When the road needs to cross a cliff and a canyon, the construction of the bridge tunnel is particularly difficult. The existing crossing canyon usually adopts a large-span bridge type, such as a suspension bridge, but a main tower is generally required to be arranged during the construction of the conventional suspension bridge, and the selection and the construction of the position of the main tower are a great difficulty of the crossing canyon bridge engineering.
Disclosure of Invention
The invention aims to solve the technical problem of providing a bridge and tunnel structure crossing canyons at a cliff and a construction method thereof, and aims to solve the problems that a main tower is difficult to select a site and difficult to construct when a suspension bridge crosses canyons in the prior art.
The bridge-tunnel structure for crossing canyons at the cliffs comprises main line tunnels, wherein the main line tunnels are arranged in mountains on two sides of the canyons, canyon sections of the main line tunnels are crossed by main-tower-free suspension bridges, and two ends of each main-tower-free suspension bridge are respectively connected with the main line tunnels in the mountains on two sides in a following mode.
Furthermore, the main-tower-free suspension bridge comprises a main cable, slings, a main beam, a bridge deck structure and an anchoring tunnel, wherein the vertical surface of the main cable is in a catenary shape, the slings are suspended below the main cable at a certain interval, and the main beam and the bridge deck structure are hoisted; the anchoring tunnels are arranged above the main line tunnels in the mountain bodies on the two sides, and the end parts of the main cables are anchored into the anchoring tunnels.
Furthermore, the bridge-tunnel structure further comprises a main cable channel and a U-shaped tunnel, the longitudinal direction of the main cable channel is parallel to the longitudinal direction of the main tower-free suspension bridge, one end of the main cable channel is communicated with the anchoring tunnel, and the other end of the main cable channel is directly communicated with the scarp; the main cable penetrates into the main cable channel, and the end part of the main cable is anchored into the anchoring tunnel; the anchoring tunnel is perpendicular to the longitudinal direction of the main line tunnel and the main cable, the anchoring tunnel is connected with the main line tunnel through the U-shaped tunnel arranged on the side, and the U-shaped tunnel is a construction and maintenance channel of the anchoring tunnel.
Further, concrete is poured into the anchoring tunnel to form an anchor ingot, and the end parts of the main cables are anchored into the anchor ingot after being dispersed; an overhaul channel is reserved in the anchor ingot, and the U-shaped tunnel and each main cable channel are communicated through the overhaul channel.
Furthermore, a main cable saddle is embedded at one end, close to the non-main-tower suspension bridge, of the main cable channel, a scattered cable saddle is embedded at one end, close to the anchoring tunnel, of the main cable channel, the main cable is connected into the main cable channel through the main cable saddle, and the main cable is scattered towards two sides through the scattered cable saddle to form a plurality of anchoring steel bundles to be anchored into the anchor ingot.
Furthermore, the rock mass at the bottom of the main cable saddle is reinforced by an anchor rod or an anchor cable.
Furthermore, the main line tunnels in the mountains on two sides are constructed by a mining method, the main line tunnels are in an arch-connected tunnel type or ultra-small clear distance tunnel type at the positions where the main line tunnels are connected with the main-tower-free suspension bridge, and the main-tower-free suspension bridge is a whole bridge, so that the construction cost is reduced.
Furthermore, U type tunnel, anchor tunnel and main push-towing rope passageway all adopt the shape of a hoof section, U type tunnel, main push-towing rope passageway all adopt combined type lining cutting structure and mine method construction.
Furthermore, the U-shaped tunnel is provided with a fireproof rolling door at the joint of the U-shaped tunnel and the main line tunnel.
The invention also provides a construction method of the bridge and tunnel structure, aiming at solving the technical problems, and the construction method comprises the following steps:
s1, constructing main line tunnels in the mountain bodies on two sides;
s2, constructing a U-shaped tunnel from the side of the main line tunnel to the upper part of the main line tunnel;
s3, constructing an anchoring tunnel which is above the main line tunnel and is vertical to the main line tunnel;
s4, constructing a main cable channel, and reinforcing a rock mass below the main cable saddle;
s5, mounting a main cable saddle and a scattered cable saddle;
s6, erecting a main cable;
s7, pouring and anchoring concrete in the tunnel;
s8, mounting a sling;
s9, constructing the girder by adopting a suspension splicing method or a suspension casting method;
and S10, mounting a bridge deck structure.
Compared with the prior art, the invention has the beneficial effects that:
in the bridge-tunnel structure, the canyon section of the main line tunnel is spanned by the main-tower-free suspension bridge, and two ends of the main-tower-free suspension bridge are respectively connected with the main line tunnels in the mountain bodies at two sides. The bridge and tunnel structure of the invention cancels the main tower of the suspension bridge, utilizes the mountain body to anchor, and has low construction cost and good landscape effect. Meanwhile, the construction method of the bridge-tunnel structure is low in difficulty and high in feasibility of implementation, and the problem that a suspension bridge at the cliff spans across canyons is solved.
Drawings
Fig. 1 is an elevation view schematically illustrating a bridge and tunnel structure across a canyon at a scarp according to an embodiment of the present invention;
FIG. 2 is an enlarged view of the tunnel-bridge structure of FIG. 1 at the location of the anchor tunnels;
fig. 3 is a schematic plan view of the bridge-tunnel structure shown in fig. 1.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention; the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; furthermore, unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, as they may be fixedly connected, detachably connected, or integrally connected, for example; the two components can be directly connected or indirectly connected through an intermediate medium, and the two components can be communicated with each other. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 3, a preferred embodiment of the present invention is shown, which is a bridge tunnel structure across a canyon at a scarp, and includes a main line tunnel 1, a main cable channel 2 and a U-shaped tunnel 3.
The main line tunnel 1 is arranged in mountains on two sides of a canyon, a canyon section of the main line tunnel 1 is spanned by a main-tower-free suspension bridge 4, and two ends of the main-tower-free suspension bridge 4 are respectively connected with the main line tunnel 1 in the mountains on two sides in an in-line mode.
The main-pylon-free suspension bridge 4 includes
The longitudinal direction of the main cable channel 2 is parallel to the longitudinal direction of the main tower-free suspension bridge 4, one end of the main cable channel 2 is communicated with the anchoring tunnel 44, and the other end is directly communicated with the scarp. The
The anchoring tunnel 44 is perpendicular to the longitudinal direction of the main line tunnel 1 and the
Concrete is poured into the anchoring tunnel 44 to form an
A main cable saddle 6 is embedded at one end of the main cable channel 2 close to the non-main-tower suspension bridge 4, a
The main cable channel 2 is one-level waterproof.
The main line tunnels 1 in the mountain bodies on two sides are constructed by a mining method, the main line tunnels 1 are in a multi-arch tunnel type or ultra-small clear distance tunnel type at the positions where the main-tower-free suspension bridges 4 are connected, and the main-tower-free suspension bridges 4 are full bridges so as to reduce the construction cost.
The U-shaped tunnel 3, the anchoring tunnel 44 and the main cable channel 2 all adopt horseshoe-shaped sections. The U-shaped tunnel 3 and the main cable channel 2 are both of a composite lining structure and are constructed by a mining method.
The embodiment also provides a construction method of the bridge and tunnel structure, which comprises the following steps:
s1, constructing main line tunnels 1 in the mountain bodies on two sides;
S2, constructing a U-shaped tunnel 3 from the side of the main line tunnel 1 to the upper side of the main line tunnel 1;
s3, constructing an anchoring tunnel 44 which is vertical to the main line tunnel 1 above the main line tunnel 1;
s4, constructing the main cable channel 2, and reinforcing the rock mass below the main cable saddle 6;
s5, mounting a main cable saddle 6 and a
s6, erecting the
s7, pouring concrete in the anchoring tunnel 44;
s8, mounting a sling;
s9, constructing the girder by adopting a suspension splicing method or a suspension casting method;
s10, mounting the
In conclusion, the bridge and tunnel structure of the embodiment cancels the main tower of the suspension bridge, utilizes the mountain body for anchoring, and has low construction cost and good landscape effect. Meanwhile, the construction method of the bridge-tunnel structure is low in difficulty and high in feasibility of implementation, and the problem that a suspension bridge at the cliff spans across canyons is solved.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention.