A construction method for adjustable support of a trench cable trough template in a tunnel

Abstract

A construction method for adjustable support of a water ditch and cable trough template in a tunnel, the construction method uses several sets of adjustable supports. During construction, several sets of the adjustable supports are arranged at a certain interval along the longitudinal direction of the tunnel, each set of the adjustable supports is respectively connected to a first connecting frame and a second connecting frame through several cross braces, the adjustable supports are connected in series with each other through several cross braces and the relative fixation of each set of the adjustable supports is ensured, and then the verticality of the vertical support is maintained by adjusting the adjustment bolts, and at the same time, several parallel plane templates are connected on the inner side of the vertical support through bolt holes, and the water ditch template and the cable trough template are connected at the lower end of the horizontal cross frame, and finally the height of the horizontal cross frame is adjusted according to the elevation design of the water and electricity ditch foundation, and then the horizontal cross frame is kept relatively fixed by tightening the spare bolts, and when the several sets of adjustable supports are adjusted as above, the water and electricity ditch foundation of the water ditch and cable trough in the tunnel can be poured by referring to conventional technology.

Description

Technical Field

[0001] The invention belongs to the technical field of concrete formwork construction, in particular to a construction method for adjustable support of a ditch cable trough formwork in a tunnel. Background Art

[0002] The construction of water ditch and cable trough templates in tunnels is very common. The conventional construction method is to build a wooden template and then cast the foundation of the water and electricity ditch. This method of manually building wooden templates is relatively expensive, and the wooden template construction method is relatively wasteful of construction materials. Due to the material reason, the wooden template cannot be reused after use.

[0003] Up to now, there has been no relevant report on the construction method of using adjustable support of cable trough formwork in tunnels. Summary of the invention

[0004] In order to solve the above problems, the present invention provides a construction method for adjustable support of a tunnel ditch cable trough template. The construction method can achieve the rapid construction problem of the tunnel ditch cable trough template through several sets of adjustable supports. The adjustable supports can be reused to save construction costs.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0006] A construction method for adjustable support of a ditch cable trough template in a tunnel, the construction method uses several sets of adjustable supports, each set of the adjustable supports includes a first connecting frame, a horizontal cross frame, an inclined support, a spare bolt, a second connecting frame, a large support, a vertical support, an adjustment bolt and an adjustment pad, the ditch template and the cable trough template have corresponding specifications and sizes according to design requirements, and is characterized in that;

[0007] In each set of the adjustable supports, a vertical bracket with a certain height is connected to an inclined bottom plate at its left bottom, a large bracket is connected between the bottom plate and the vertical bracket, an internal threaded hole is arranged at the left end of the bottom plate, an adjustment bolt is connected in the internal threaded hole, an adjustment pad that can be adjusted to a certain angle is connected at the bottom of the adjustment bolt, a second connecting frame is connected to the upper end of the large bracket, a plurality of bolt holes with equal spacing are drilled on the vertical bracket, a horizontal cross frame that can move up and down is connected to the right side of the vertical bracket through a sleeve, an oblique bracket is connected to the horizontal cross frame, the sleeve is connected to the left side of the oblique bracket, a tightening bolt is screwed to the upper and lower ends of the sleeve, and the first connecting frame is connected to the rightmost end of the horizontal cross frame;

[0008] During construction, several sets of the adjustable supports are arranged at a certain interval along the longitudinal direction of the tunnel, and each set of the adjustable supports is connected to the first connecting frame and the second connecting frame respectively through several cross braces. Through several cross braces, several sets of the adjustable supports can be connected in series with each other and ensure the relative fixation of each set of the adjustable supports. Secondly, the verticality of the vertical support is maintained by adjusting the adjustment bolts. At the same time, several parallel plane templates are connected to the inner side of the vertical support through the bolt holes, and the ditch template and the cable trough template are connected to the lower end of the horizontal cross frame. The relative position and quantity of the ditch template and the cable trough template are determined according to the design requirements. Finally, the height of the horizontal cross frame is adjusted according to the elevation design of the hydropower ditch foundation, and then the horizontal cross frame is kept relatively fixed by tightening the spare bolts. When several sets of adjustable supports are adjusted as above, the hydropower ditch foundation can be poured for the ditch and cable trough in the tunnel with reference to conventional technology.

[0009] Due to the adoption of the above technical solution, the present invention produces the following positive effects:

[0010] 1. The adjustable support construction method of the ditch cable trough template of the present invention can save manpower and material resources for on-site production of wooden templates and save construction costs.

[0011] 2. The adjustable support for the ditch cable trough template of the present invention has the characteristics of simple structure, reusability, safe operation and low cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the structure of the adjustable support of the present invention.

[0013] Figure 1 In the middle: 1-water and electricity trench foundation; 2-ditch template; 3-cable trough template; 4-pipe segment; 5-first connecting frame; 6-horizontal cross frame; 7-inclined bracket; 8-fastening bolts; 9-second connecting frame; 10-large bracket; 11-vertical bracket; 12-adjusting bolts; 13-adjusting pads; 14-plane template. DETAILED DESCRIPTION

[0014] The present invention is a construction method for adjustable support of a water ditch cable trough template in a tunnel. The construction method realizes the foundation construction of a hydropower ditch in the tunnel by fixing several sets of adjustable supports to each other. Although the technical solution described in the present invention is not complicated, it has significant outstanding features, so that it can effectively and quickly solve the foundation construction of the hydropower ditch, save manpower and material resources, and is an effective construction method.

[0015] Combination Figure 1The construction method of the present invention uses several sets of adjustable supports, each set of the adjustable supports includes a first connecting frame 5, a horizontal cross frame 6, an inclined support 7, a fastening bolt 8, a second connecting frame 9, a large support 10, a vertical support 11, an adjustment bolt 12 and an adjustment pad 13. The structural connection relationship of the adjustable supports is referred to the technical solution, which will not be described in detail. It should be noted that the adjustable supports have the characteristics of simple structure, easy manufacturing and repeated use.

[0016] The ditch template and cable trough template have corresponding specifications and sizes according to the design requirements. Usually, there are ditch and cable trough on both sides of the bottom of the tunnel, but the number of cable troughs is determined according to the construction design requirements. Figure 1 It is a schematic cross-sectional diagram showing two cable troughs and a ditch on the right side of the tunnel bottom, for illustration purposes only.

[0017] During normal construction, several sets of the adjustable supports are arranged at a certain interval along the longitudinal direction of the tunnel, and each set of the adjustable supports is connected to the first connecting frame 5 and the second connecting frame 9 respectively through several cross braces. Through several cross braces, several sets of the adjustable supports can be connected in series with each other and the relative fixation of each set of the adjustable supports can be ensured. At the same time, the spacing of several sets of adjustable supports can also be adjusted through several cross braces.

[0018] Secondly, the bolts 12 are adjusted to maintain the verticality of the vertical bracket 11. The length of the vertical bracket 11 is determined according to the height of the hydropower trench foundation and meets the up and down displacement of the horizontal cross frame 6. The large bracket 10 helps to enhance the strength of the vertical bracket 11. At the same time, several parallel plane templates 14 are connected through the bolt holes on the inner side of the vertical bracket 11, and the ditch template 2 and the cable trough template 3 are connected to the lower end of the horizontal cross frame 6. The oblique bracket 7 helps to enhance the tensile strength of the horizontal cross frame 6. The relative position and quantity of the ditch template 2 and the cable trough template 3 are determined according to the design requirements. Finally, the height of the horizontal cross frame 6 is adjusted according to the elevation design of the hydropower trench foundation 1, and the horizontal cross frame 6 is kept relatively fixed by tightening the spare bolts 8. When several sets of adjustable supports are adjusted as above, the hydropower trench foundation can be poured for the ditch cable trough in the tunnel with reference to conventional technology.

Claims

1. A construction method for adjustable support of a ditch cable trough template in a tunnel, the construction method using several sets of adjustable supports, each set of the adjustable supports comprising a first connecting frame (5), a horizontal cross frame (6), an inclined support (7), a spare bolt (8), a second connecting frame (9), a large support (10), a vertical support (11), an adjustment bolt (12) and an adjustment pad (13), the ditch template and the cable trough template both having corresponding specifications and sizes according to design requirements, characterized in that ； In each set of the adjustable support, a vertical support (11) with a certain height is connected to an inclined bottom plate at its left bottom, a large support (10) is connected between the bottom plate and the vertical support (11), an internal threaded hole is arranged at the left end of the bottom plate, an adjustment bolt (12) is connected in the internal threaded hole, the bottom of the adjustment bolt (12) is connected to an adjustment pad (13) that can be adjusted to a certain angle, a second connecting frame (9) is connected to the upper end of the large support (10), a plurality of bolt holes with equal spacing are drilled on the vertical support (11), a horizontal cross frame (6) that can move up and down is connected to the right side of the vertical support (11) through a sleeve, an inclined support (7) is connected to the horizontal cross frame (6), the left side of the inclined support (7) is connected to the sleeve, a reserve bolt (8) is screwed on the upper and lower ends of the sleeve, and the first connecting frame (5) is connected to the rightmost end of the horizontal cross frame (6); During construction, several sets of the adjustable supports are arranged at a certain interval along the longitudinal direction of the tunnel, and each set of the adjustable supports is connected to the first connecting frame (5) and the second connecting frame (9) respectively through several cross braces. The several sets of the adjustable supports can be connected in series with each other through the several cross braces to ensure the relative fixation of each set of the adjustable supports. Then, the verticality of the vertical support (11) is maintained by adjusting the adjustment bolts (12). At the same time, several parallel horizontal supports are connected to the inner side of the vertical support (11) through the bolt holes. The horizontal cross frame (6) is provided with a surface template (14), and a water ditch template (2) and a cable trough template (3) are connected at the lower end of the horizontal cross frame (6). The relative position and quantity of the water ditch template (2) and the cable trough template (3) are determined according to the design requirements. Finally, the height of the horizontal cross frame (6) is adjusted according to the elevation design of the water and electricity ditch foundation (1). The horizontal cross frame (6) is then kept relatively fixed by tightening the spare bolts (8). After the adjustment of the several sets of adjustable supports is completed, the water and electricity ditch foundation can be poured for the water ditch and cable trough in the tunnel.

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