阅读说明：本技术 一种悬浮隧道节段顶推施工的锚固装置 (Anchoring device for incremental launching construction of suspended tunnel segment ) 是由 杨赢 孙峥源 于 2021-08-12 设计创作，主要内容包括：本发明公开了一种悬浮隧道节段顶推施工的锚固装置,包括浮筒、钢筋混凝土锚块、锚索,浮筒通过锚链与钢筋混凝土锚块连接,当钢筋混凝土锚块发生移位时,通过浮筒提供浮力和锚索拉力的共同作用能使钢筋混凝土锚块重新复位,钢筋混凝土锚块内侧间隔安装有型钢滑轨,其内部有预留孔道,型钢滑轨上翼缘与钢筋混凝土锚块浇筑在一起,下翼缘放入管体滑槽中,使得顶推过程中管体能向前定向滑动,锚链连接浮筒与钢筋混凝土锚块,锚索穿过钢筋混凝土锚块预留孔道,并锚入水下基础。本发明构造明确,安装便利,性能可靠,不仅能使顶推过程中的管体能向前滑动,限制管体上浮,还能保证处于悬臂状态管体的稳定,在施工结束后可转换为悬浮隧道永久锚固装置。(The invention discloses an anchoring device for suspension tunnel segment incremental launching construction, which comprises a floating barrel, a reinforced concrete anchor block and an anchor cable, wherein the floating barrel is connected with the reinforced concrete anchor block through an anchor chain, when the reinforced concrete anchor block shifts, the reinforced concrete anchor block can reset again under the combined action of buoyancy provided by the floating barrel and the tension of the anchor cable, profile steel slide rails are arranged at the inner sides of the reinforced concrete anchor block at intervals, reserved holes are formed in the profile steel slide rails, the upper flanges of the profile steel slide rails and the reinforced concrete anchor block are poured together, the lower flanges of the profile steel slide rails are placed in a pipe body slide groove, so that the pipe body can slide forwards in a directional manner, the anchor chain is connected with the floating barrel and the reinforced concrete anchor block, and the anchor cable penetrates through the reserved holes of the reinforced concrete anchor block and is anchored into an underwater foundation. The invention has the advantages of clear structure, convenient installation and reliable performance, not only can ensure that the pipe body can slide forwards in the pushing process to limit the pipe body to float upwards, but also can ensure the stability of the pipe body in a cantilever state, and can be converted into a permanent anchoring device for a suspension tunnel after the construction is finished.)

1. The utility model provides an anchor that suspension tunnel segment top pushed away construction, includes pipeline section (1), reinforced concrete anchor block (3), anchor rope (6), its characterized in that:

the reinforced concrete anchor blocks (3) are tightly attached to the pipe sections (1), profile steel sliding rails (4) are installed on the inner sides of the reinforced concrete anchor blocks at intervals, sliding grooves (5) are formed in the pipe sections (1) at intervals, and the sliding grooves (5) are in one-to-one adaptive connection with the profile steel sliding rails (4);

the upper end of the reinforced concrete anchor block (3) is provided with a buoy (2) through an anchor chain (7);

and a reserved hole channel is arranged in the reinforced concrete anchor block (3), one end of each anchor cable (6) respectively penetrates through the corresponding reserved hole channel on the reinforced concrete anchor block (3), two sides of each anchor cable are wound on the periphery of the pipe body (1) after penetrating through the reinforced concrete anchor block (3), and the two free ends are connected to an underwater foundation.

2. The anchoring device for incremental launching construction of the suspended tunnel segment according to claim 1, wherein: the buoy (2) is made of high molecular polyethylene and serves as a temporary device to provide upward buoyancy.

3. The anchoring device for incremental launching construction of the suspended tunnel segment according to claim 1, wherein: the reinforced concrete anchor blocks (3) are arc-shaped reinforced concrete plates, and the section steel slide rails (4) are installed around the axes of the section steel slide rails at equal intervals.

4. The anchoring device for incremental launching construction of the suspended tunnel segment according to claim 3, wherein: the section steel slide rail (4) is H-shaped steel, the length of the section steel slide rail is consistent with that of the reinforced concrete anchor block (3), the sliding groove (5) is a groove in the surface of the pipe section (1), the length of the sliding groove is equal to the length of a section of the pipe section (1), the width of the sliding groove is larger than the width of a flange of the section steel slide rail, the flange of the outer side of the section steel slide rail (4) is poured together with the reinforced concrete anchor block (3), and the flange of the inner side of the section steel slide rail is arranged in the sliding groove (5).

5. The anchoring device for incremental launching construction of the suspended tunnel segment according to claim 1, wherein: the anchor chain (7) is a steel strand, one end of the anchor chain is connected with the buoy (2), and the other end of the anchor chain is connected with the reinforced concrete anchor block (3).

6. The anchoring device for incremental launching construction of the suspended tunnel segment according to claim 1, wherein: the sliding groove (5) is internally coated with a lubricant.

Technical Field

The invention belongs to the field of civil engineering, and particularly relates to an anchoring device for incremental launching construction of a suspended tunnel segment.

Background

The suspension tunnel mainly comprises pipe sections, anchor cables, a foundation, revetment sections and the like, and has the advantages of large spanning capacity, adaptability to deep water construction, all-weather operation, good environmental protection and economy and the like. It is considered to be the new traffic structure with the most competitive and development potential in the 21 st century.

Generally speaking, the buoyancy that suspension tunnel body received is greater than its dead weight, when the segmental pushing construction, has the trend of come-up, and the suspension tunnel is located certain degree of depth department under water, easily receives the rivers disturbance, and then produces acutely to rock, seriously influences structural stability and brings huge difficulty for the construction. Therefore, there is a need for an anchoring device that can maintain the stability of the pipe body without interfering with the construction.

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides an anchoring device for incremental launching construction of a suspended tunnel section, which is used for ensuring the stability of a pipe body in a cantilever state in the construction process.

(II) technical scheme

The invention aims to provide an anchoring device for incremental launching construction of a suspended tunnel segment, which is used for ensuring the stability of a pipe body in a cantilever state in the construction process.

The anchoring device for the incremental launching construction of the suspended tunnel segment comprises a floating barrel, a reinforced concrete anchor block, a profile steel slide rail, a sliding groove, an anchor cable and an anchor chain.

The buoy is made of high-molecular polyethylene, and the lower part of the buoy is connected with the reinforced concrete anchor block through an anchor chain to limit the displacement of the reinforced concrete anchor block.

The flotation pontoon is interim device, and the flotation pontoon can be demolishd after the grout is handled between reinforced concrete anchor block and body and is accomplished or stopper installation is accomplished.

The reinforced concrete anchor block is an arc-shaped reinforced concrete slab, profile steel slide rails are arranged on the inner side of the reinforced concrete anchor block at uniform intervals, a reserved hole channel is formed in the reinforced concrete anchor block, and the upper end of the reinforced concrete anchor block is connected with the buoy through an anchor chain.

The section steel slide rail is H-shaped steel, the length of the section steel slide rail is consistent with that of the reinforced concrete anchor block, and the upper flange of the section steel slide rail is poured together with the reinforced concrete anchor block.

The sliding groove is a groove on the surface of the suspended tunnel pipe body, the length of the sliding groove is equal to the length of the pipe body section, the width of the sliding groove is slightly larger than the width of a flange of the section steel sliding rail, the position of the sliding groove corresponds to the position of the section steel sliding rail, and the number of the sliding grooves is equal to the number of the section steel sliding rails.

The anchor chain is a steel strand, one end of the anchor chain is connected with the buoy, and the other end of the anchor chain is connected with the reinforced concrete anchor block.

One end of the anchor cable penetrates through the preformed hole of the reinforced concrete anchor block and is connected with the underwater foundation, and the other end of the anchor cable is directly connected with the underwater foundation.

Furthermore, the installation position of the device is determined according to the designed anchor cable position, and the position of the anchor cable is ensured to be consistent with the preset anchor cable position.

Further, the reinforced concrete anchor block is connected with the sliding groove through the profile steel sliding rail, so that the pipe body can slide forwards in the pushing process, the pipe body is limited to float upwards, and the stability of the pipe body in a cantilever state is guaranteed.

Furthermore, in the process that the pipe body is pushed forwards, the anchor block can also move forwards to a certain extent, and under the combined action of buoyancy of the buoy and tension of the anchor cable, the anchor block can automatically reset.

Furthermore, after the pipe body pushing construction is completed, gaps between the underwater concrete pouring pipe body and the anchor blocks can be adopted or a limiter can be installed, so that the pipe body becomes a permanent anchoring device for the suspended tunnel.

Advantageous effects

After adopting the technical scheme, compared with the prior art, the invention has the following advantages: the utility model provides an anchor that suspension tunnel segment top pushed construction, the structure is clear and definite, and the installation is convenient, and the dependable performance can not only make the body of top in-process slide forward, can also guarantee to be in the stability of cantilever state body.

Drawings

FIG. 1 is a schematic view of the overall structure of a suspension tunnel equipped with the present invention;

FIG. 2 is a schematic view of the main structure of the present invention;

FIG. 3 is a schematic cross-sectional structure;

fig. 4 is a schematic longitudinal sectional structure.

In the figure: 1 pipe section, 2 flotation pontoons, 3 reinforced concrete anchor blocks, 4 steel slide rails, 5 sliding chutes, 6 anchor cables and 7 anchor chains.

Detailed Description

The invention is explained in more detail below with reference to the figures and examples.

As shown in fig. 1-4: an anchoring device for incremental launching construction of a suspended tunnel segment, comprising: the device comprises a pipe section 1, a buoy 2, a reinforced concrete anchor block 3, a profile steel slide rail 4, a sliding chute 5, an anchor cable 6 and an anchor chain 7. The main structure of the invention is shown in figure 2 and comprises a reinforced concrete anchor block 3, a profile steel slide rail 4, an anchor cable 6 and an anchor chain 7.

As shown in fig. 1, the pipe section 1 is a suspended tunnel pipe body for bearing vehicle traffic. The buoy 2 is made of high polymer polyethylene, the lower part of the buoy is connected with the reinforced concrete anchor block 3 through the anchor chain 7, and when the reinforced concrete anchor block 3 is displaced, the anchor chain 7 provides horizontal component force of pulling force to enable the reinforced concrete anchor block 3 to be reset again. The sliding groove 5 is a groove on the surface of the suspended tunnel pipe body, the length of the sliding groove is equal to the length of the pipe body segment, and the position of the sliding groove corresponds to that of the section steel sliding rail 4.

As shown in figure 1, one end of an anchor chain 7 is connected with a buoy 2, the other end of the anchor chain is connected with a reinforced concrete anchor block 3, one end of an anchor cable 6 penetrates through a reserved hole of the reinforced concrete anchor block 3 and is anchored into an underwater foundation, and the other end of the anchor cable is directly anchored into the underwater foundation.

As shown in fig. 2, the reinforced concrete anchor block 3 is a circular arc-shaped reinforced concrete slab, the inner side of which is provided with profile steel slide rails 4 at uniform intervals, the inner part of which is provided with a reserved hole passage, and the upper end of which is connected with the buoy 2 through an anchor chain 7. The section steel slide rail 4 is H-shaped steel, the length of the section steel slide rail is consistent with that of the reinforced concrete anchor block 3, and the upper flange of the section steel slide rail is poured together with the reinforced concrete anchor block 3.

The buoy has the functions of positioning and resetting. In the pushing construction process, the pipe body extends forwards, the anchor block 3 can be driven to move forwards under the action of friction force between the sliding rail and the profile steel sliding rail 4, and the anchor cable 6 is inclined at the moment. The direction of the tensile force of anchor line 6 also becomes inclined, giving anchor block 3 a horizontal restoring force.

The section steel slide rail 4 can ensure that the pipe body can smoothly slide forwards in the pushing process to limit the upward floating of the pipe body, and can also ensure the stability of the pipe body in a cantilever state.

Also in the pushing construction process of the pipe body 1, the anchoring device can not only keep the pipe body stable, but also meet the requirement that the pipe body slides forwards.

The suspension tunnel body in the construction stage is in a cantilever state, a final stress system is not formed yet, the structural rigidity is small, the deformation is large, the stability is poor, the suspension tunnel is located in water with a certain depth, vortex-induced vibration can be caused when water flows through the suspension tunnel pipe section 1, the structural stability is seriously influenced, and difficulty is brought to construction.

1. When the pipe section 1 vibrates up and down, the reinforced concrete anchor block 3 above the pipe section and the profile steel slide rail 4 can be driven to vibrate up and down together, and because the anchor cable 6 connected with an underwater foundation penetrates through the reinforced concrete anchor block 3, the vibration of the reinforced concrete anchor block 3 can be restrained, so that the vibration of the pipe section 1 is restrained, and the purpose of ensuring that the pipe body is in a cantilever state and stable in a construction stage is achieved.

2. The section steel slide rail 4 is arranged in the slide groove 5, and in order to reduce the sliding friction force, a lubricant is coated in the slide groove 5, so that the pipe section 1 can smoothly slide forwards in the pushing process.

3. In the pushing process, the pipe section 1 moves forwards to drive the reinforced concrete anchor block 3 to move forwards, in order to ensure that the position of the anchoring device is relatively fixed, the buoy 2 is arranged above the reinforced concrete anchor block 3, the lower part of the buoy 2 is connected with the reinforced concrete anchor block 3 through the anchor chain 7, and when the reinforced concrete anchor block 3 is displaced, the buoy can reset the reinforced concrete anchor block 3 under the combined action of buoyancy and anchor rope force provided by the anchor chain 7.

4. After the suspension tunnel pipe body pushing operation is completed, grouting treatment can be performed between the reinforced concrete anchor block 3 and the pipe section 1, or a limiter is installed to limit the displacement of the concrete anchor block, so that the anchoring device is converted into a permanent anchoring device, and the construction cost is favorably reduced.

The construction method of the anchoring device for the incremental launching construction of the suspended tunnel segment comprises the following specific steps:

s1, connecting the upper sides of the reinforced concrete anchor blocks 3 through anchor chains 7 to connect the buoys 2;

s2, fixedly connecting one free end of an anchor cable 6 to a pre-designed underwater foundation position, connecting a reinforced concrete anchor block 3 with a sliding groove 5 of a pipe section 1 of a corresponding suspension tunnel pipe body through a profile steel sliding rail 4, coating a lubricant in the sliding groove 5 to ensure that the pipe body can smoothly slide forwards and is limited to float upwards in the pushing process, and enabling the other free end of the anchor cable 6 to penetrate through a reserved hole of the reinforced concrete anchor block and be connected with an underwater foundation for fixing;

s3, after the pipe body pushing construction is finished, adopting underwater concrete to pour a gap between the pipe body and the anchor block or installing a limiter to enable the pipe body to become a permanent anchoring device of the suspension tunnel;

and S3, detaching the buoy 2.

In light of the foregoing, it will be apparent to those skilled in the art from this disclosure that various changes and modifications can be made without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and the protection scope must be determined by the scope of the claims.