Locking foot structure for large-diameter grouting pipe

Abstract

The utility model relates to the technical field of tunnel construction, and discloses a foot-locking structure for a large-diameter grouting pipe, which comprises a plurality of annular I-shaped steel structures distributed along the excavation direction of a tunnel, and a plurality of foot-locking steel plates are fixedly mounted on each annular I-shaped steel. The foot-locking steel plates are sequentially arranged on the left side and the right side from a tunnel arch wall to an arch foot section from high to low. A positioning structure capable of positioning the grouting ends of the large-diameter grouting pipes is arranged on each foot locking steel plate, and the positioning structures enable the large-diameter grouting pipes to be arranged up and down on the left side and the right side of the annular I-shaped steel in a staggered mode; through the arrangement mode, diffusion of grouting is facilitated, control over vault sinking and ground sinking is enhanced, and the quality safety of tunnel engineering is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of tunnel construction, in particular to a locking foot structure for a grouting pipe with a large diameter. Background Art

[0002] In the construction of soft rock tunnels, locking feet is a very effective construction auxiliary measure. However, when the small grouting pipe cannot control the sinking of the vault and the ground, it is often necessary to increase the size of the grouting pipe and the amount of grouting. For grouting pipes with larger diameters, if the traditional locking foot method is used, the distance between the grouting pipes will be too close, which is not conducive to the diffusion of grouting; large steel pipes are prone to cracking the surrounding concrete, making it difficult to ensure the construction quality. Utility Model Content

[0003] In order to solve the above problems, the utility model provides a locking foot structure for a grouting pipe with a large diameter.

[0004] The technical solution adopted by the utility model is:

[0005] A locking foot structure for a large-diameter grouting pipe, the locking foot structure for the large-diameter grouting pipe comprising a plurality of annular I-beams arranged at equal intervals along a tunnel excavation direction, the plurality of annular I-beams being fixedly connected by cross braces to form an integral tunnel steel arch frame; a plurality of locking foot steel plates are fixedly installed on each annular I-beam, the plurality of locking foot steel plates are arranged at intervals along the middle section of the tunnel arch toward the arch foot, and the plurality of locking foot steel plates installed on each annular I-beam are symmetrically extended from high to low to the left and right sides of the annular I-beam; each locking foot steel plate is provided with a positioning structure capable of positioning the grouting end of the large-diameter grouting pipe, so that the large-diameter grouting pipe is arranged in a left-right staggered manner relative to the annular I-beam.

[0006] Furthermore, the locking foot steel plate is a rectangular steel plate, one end of which is a connecting end connected to the annular I-beam, and the other end of which extends to the left or right side of the annular I-beam to form an extended end; the lower edge of the extended end of the locking foot steel plate is provided with an arc-shaped positioning groove, and the arc-shaped positioning groove constitutes a positioning structure for positioning the grouting end of a large-diameter grouting pipe.

[0007] Furthermore, the grouting end of the large-diameter grouting pipe passes through the arc-shaped positioning groove of the locking foot steel plate and is welded and fixed to the locking foot steel plate at the arc-shaped positioning groove.

[0008] Furthermore, the connection end of the locking foot steel plate is flush with the annular I-beam and is welded and fixed to the annular I-beam.

[0009] Furthermore, at least two locking foot steel plates are installed on each annular I-beam, and the vertical distance between the two locking foot steel plates is 1m.

[0010] Furthermore, the outer edge of the arc-shaped positioning groove is 50 cm away from the outer edge of the locking foot steel plate.

[0011] The beneficial effects of the utility model are:

[0012] The locking foot structure for large-diameter grouting pipes can be arranged in a left-right staggered manner relative to the annular I-beam, which is beneficial to the diffusion of grouting, strengthens the control of arch and ground subsidence, and improves the quality and safety of tunnel engineering. In addition, the locking foot structure of large-diameter grouting pipes is simple to make and easy to install, and can be promoted and applied in the construction of soft surrounding rock tunnels to improve the quality of tunnel construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of the locking foot structure of the utility model;

[0014] Figure 2 This is a schematic diagram of the layout position of the locking foot steel plate of the utility model;

[0015] Figure 3 This is a structural schematic diagram of the locking foot steel plate of the utility model;

[0016] Figure 1 —3, 1—tunnel steel arch frame, 2—large diameter grouting pipe, 3—annular I-beam, 4—locking foot steel plate, 5—connecting end, 6—extended end, 7—arc-shaped positioning groove. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings of the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] For ease of description, spatially relative terms such as "upper," "lower," "left," and "right" may be used herein to describe the relationship of one element or feature shown in a figure to another element or feature. It should be understood that, in addition to the orientation shown in the processing figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, elements described as being "below" other elements or features will be defined as being "above" the other elements or features. Therefore, the exemplary term "below" can include both upper and lower orientations. The device can be positioned in other ways, and the spatially relative descriptions used herein can be interpreted accordingly.

[0019] This embodiment provides a locking foot structure for a large diameter grouting pipe, such as Figure 1 and Figure 2 As shown, the locking foot structure for the large diameter grouting pipe includes a plurality of groups of annular I-beam steel frames connected by cross braces to form an integral tunnel steel arch frame 1. Figure 2 As shown, each set of annular I-beam frames includes two annular I-beams 3 fixedly connected by a cross brace. The tunnel steel arch frame 1 can support the tunnel surrounding rock during tunnel construction and can play an initial support role together with anchor rods and shotcrete.

[0020] like Figure 2 and Figure 3 As shown, four sets of locking foot steel plates 4 are fixedly installed on each annular I-beam 3, and the four sets of locking foot steel plates 4 are arranged at intervals along the middle section of the tunnel arch to the arch foot; the four sets of locking foot steel plates 4 installed on each annular I-beam 3 extend symmetrically from high to low to the left and right sides of the annular I-beam 3. A positioning structure capable of positioning the grouting end of the large-diameter grouting pipe 2 is provided on each locking foot steel plate 4, and the large-diameter grouting pipe 2 is arranged in a left-right staggered manner relative to the annular I-beam 3.

[0021] Further, such as Figure 2 and Figure 3 As shown, the locking foot steel plate 4 in this embodiment is a rectangular steel plate with a length of 300 cm, a width of 200 cm and a thickness of 15 cm. One end of the locking foot steel plate 4 is a connecting end 5 connected to the annular I-beam 3. The connecting end 5 of the locking foot steel plate 4 is flush with the annular I-beam 3, and the rear side of the connecting end 5 is welded and fixed to the annular I-beam 3. The other end of the locking foot steel plate 4 extends to the left or right side of the annular I-beam 3 to form an extended end 6. The lower edge of the extended end 6 of the locking foot steel plate 4 is provided with an arc-shaped positioning groove 7; the outer edge of the arc-shaped positioning groove 7 is 50 cm away from the outer edge of the locking foot steel plate. The arc-shaped positioning groove 7 is formed by drilling a semicircle with a diameter slightly larger than the diameter of the grouting pipe at the lower edge of the locking foot steel plate 4. The arc-shaped positioning groove 7 is used to form a positioning structure for positioning the grouting end of the large-diameter grouting pipe 2.

[0022] In the actual tunnel construction process, the annular I-beam 3 and the locking foot steel plate 4 are first manufactured in the factory according to the predetermined shape and size. After the locking foot steel plate 4 and the annular I-beam 3 are welded outside the tunnel, they can be assembled and fixed inside the tunnel. When performing tunnel grouting construction, the grouting end of the large-diameter grouting pipe 2 passes through the arc-shaped positioning groove 7 of the locking foot steel plate 4, and is welded and fixed to the locking foot steel plate 4 at the arc-shaped positioning groove 7, so that the large-diameter grouting pipe 2 is arranged in a left-right staggered manner relative to the annular I-beam 3, and then the grouting construction is performed through the large-diameter grouting pipe 2, which is conducive to the diffusion of grouting, strengthens the control of the arch crown sinking and the ground sinking, and improves the quality and safety of the tunnel project.

[0023] It should be noted that, in the actual tunnel construction process, at least two locking foot steel plates 4 are installed on each annular I-beam 3, and the vertical distance between the two locking foot steel plates 4 is 1 m, so as to ensure the diffusion effect of grouting.

[0024] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A locking foot structure for a large diameter grouting pipe, characterized in that: The locking foot structure for the large-diameter grouting pipe comprises a plurality of annular I-beams arranged at equal intervals along the tunnel excavation direction, wherein the plurality of annular I-beams are fixedly connected by cross braces to form an integral tunnel steel arch frame; a plurality of locking foot steel plates are fixedly installed on each annular I-beam, and the plurality of locking foot steel plates are arranged at intervals along the middle section of the tunnel arch toward the arch foot, and the plurality of locking foot steel plates installed on each annular I-beam are symmetrically extended from high to low to the left and right sides of the annular I-beam; a positioning structure capable of positioning the grouting end of the large-diameter grouting pipe is provided on each locking foot steel plate, so that the large-diameter grouting pipe is arranged in a left-right staggered manner relative to the annular I-beam.

2. The locking foot structure for a large diameter grouting pipe according to claim 1 is characterized in that: The locking foot steel plate is a rectangular steel plate, one end of which is a connecting end connected to the annular I-beam, and the other end of which extends to the left or right side of the annular I-beam to form an extended end; the lower edge of the extended end of the locking foot steel plate is provided with an arc-shaped positioning groove, and the arc-shaped positioning groove constitutes a positioning structure for positioning the grouting end of a large-diameter grouting pipe.

3. The locking foot structure for a large diameter grouting pipe according to claim 2 is characterized in that: The grouting end of the large-diameter grouting pipe passes through the arc-shaped positioning groove of the locking foot steel plate and is welded and fixed to the locking foot steel plate at the arc-shaped positioning groove.

4. The locking foot structure for a large diameter grouting pipe according to claim 2 is characterized in that: The connecting end of the locking foot steel plate is flush with the annular I-beam and is welded and fixed to the annular I-beam.

5. The locking foot structure for a large diameter grouting pipe according to claim 1 is characterized in that: At least two locking steel plates are installed on each annular I-beam, and the vertical distance between the two locking steel plates is 1m.

6. The locking foot structure for a large diameter grouting pipe according to claim 2 is characterized in that: The distance between the outer edge of the arc-shaped positioning groove and the outer edge of the locking foot steel plate is 50 cm.

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