Water stop device for pipe jacking construction

Abstract

The utility model relates to a water stop device for pipe jacking construction. The water stop device comprises at least one water stop ring and a plurality of stop structures which are installed at the hole in the wall face of the foundation pit through an installation structure. The multiple stop structures are circumferentially arranged on the side, away from the wall face of the foundation pit, of the water stop ring and used for preventing the water stop ring from turning outwards towards the hole. The stop structure comprises a fixing plate, a baffle and at least one adjusting bolt, the fixing plate is detachably connected to the mounting structure; a threaded through hole is formed in the fixing plate; the baffle is rotationally connected to the side, close to the water stop ring, of the fixing plate, and one side of the baffle abuts against the outer side of the water stop ring. The adjusting bolt is in threaded connection with the fixing plate through the threaded through hole, and the end of the adjusting bolt abuts against the side, away from the water stop ring, of the baffle. Through the arrangement of the stop structure, the stop structure can abut against the outer side of the water stop ring, outward folding of the water stop ring is limited through the rigid structure, and therefore the problem of sealing failure caused by too large pressure in a hole is solved.

Description

Technical Field

[0001] This utility model relates to the field of trenchless engineering technology, and in particular to a water-stopping device for pipe jacking construction. Background Technology

[0002] Trenchless pipe jacking is currently the main method for constructing underground utility tunnels, offering advantages such as environmental friendliness, short construction period, and low overall cost. Before the pipe jacking begins, a water-stopping device needs to be installed at the opening in the foundation pit wall. In existing technologies, such as... Figure 1 As shown, the water-stopping device generally includes a flange 12 and a water-stop ring 2. The flange 12 is installed at the starting opening of the foundation pit wall 1, and the water-stop ring 2 is installed on the flange 12, tightly covering the outer wall of the jacking pipe to prevent leakage. Although this structure can provide a certain degree of sealing and pressure maintenance, when there is a large amount of groundwater or mud in the tunnel, resulting in high pressure, the sealing part of the water-stop ring 2 may fold outward, creating a gap between the water-stop ring 2 and the outer wall of the jacking pipe. This can cause the water-stop ring 2 to fail to seal, leading to groundwater or mud leakage and affecting the jacking pipe construction. Utility Model Content

[0003] Therefore, it is necessary to provide a water-stopping device for pipe jacking construction to address the problem that excessive pressure on existing water-stopping devices in trenchless pipe jacking construction can easily lead to sealing failure.

[0004] A water-stopping device for pipe jacking construction includes at least one water-stop ring installed at an opening on the wall of a foundation pit via an installation structure. The water-stopping device for pipe jacking construction also includes multiple stop structures. The multiple stop structures are circumferentially arranged on the side of the water-stop ring away from the foundation pit wall to prevent the water-stop ring from turning outward toward the opening.

[0005] The stop structure includes a fixed plate and a baffle; the fixed plate is detachably connected to the installation structure; the baffle is fixed on the fixed plate and is inclined toward the side of the waterstop ring, so that the baffle abuts against the side of the waterstop ring away from the foundation pit wall.

[0006] As a preferred example, the stop structure includes: a fixed plate, a baffle, and at least one adjusting bolt; the fixed plate is detachably connected to the mounting structure; the fixed plate has a threaded through hole; the baffle is rotatably connected to the side of the fixed plate near the waterstop ring, and one side of the baffle abuts against the outer side of the waterstop ring; the adjusting bolt is screwed to the fixed plate through the threaded through hole, and the end of the adjusting bolt abuts against the side of the baffle away from the waterstop ring.

[0007] As a preferred example, the dividing line is the rotatable connection between the baffle and the fixed plate; the side of the fixed plate located at the dividing line is set as the connecting part, and the other side is set as the limiting part, and the area of ​​the connecting part is larger than that of the limiting part.

[0008] As a preferred example, the connecting part has two parallel waist holes; the length direction of the waist holes is towards the center of the waterstop ring; each of the two waist holes is provided with a bolt; the fixing plate is connected to the mounting structure by the bolt.

[0009] As a preferred example, the stop structure includes: a fixed plate and a baffle; the fixed plate is detachably connected to the mounting structure; the baffle is fixedly connected to the fixed plate; the baffle is inclined toward the waterstop ring, and the end of the baffle away from the fixed plate is flush with the inner side of the waterstop ring.

[0010] As a preferred example, the shape of the fixing plate is set to rectangular or trapezoidal; the shape of the baffle is set to rectangular.

[0011] As a preferred example, the interval between adjacent fixing plates is 20 to 100 mm.

[0012] As a preferred example, the water-stopping device for pipe jacking construction also includes a pressure gauge, which is used to monitor the pressure on the side of the water-stop ring near the foundation pit wall.

[0013] As a preferred example, a reinforcing part is provided on the inner side of the waterstop ring; the reinforcing part is oriented toward the axial direction of the waterstop ring.

[0014] As a preferred example, the installation structure includes: a base plate and a ring plate; the base plate is connected to the wall of the foundation pit; a water-stop ring is placed between the base plate and the ring plate; the ring plate is connected to the base plate by several bolts and clamps and fixes the water-stop ring.

[0015] The fixing plate is detachably connected to the ring plate.

[0016] As a preferred example, two waterstop rings are provided and are arranged on the same axis; the two waterstop rings are connected by a sleeve; a stop structure is provided on the waterstop ring on the side away from the foundation pit wall to prevent the waterstop ring from turning outward toward the opening.

[0017] The beneficial effects of this utility model are as follows:

[0018] This utility model, through the setting of the stop structure, can abut against the outside of the water-stop ring, and restrict the water-stop ring from folding outward through the rigid structure, thereby avoiding the problem of sealing failure caused by excessive pressure inside the hole. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0020] Figure 1This is a schematic diagram of an existing water-stopping device;

[0021] Figure 2 This is a front structural diagram of a water-stopping device used in pipe jacking construction.

[0022] Figure 3 for Figure 1 Schematic diagram of the AA-direction section;

[0023] Figure 4 for Figure 2 Enlarged schematic diagram of part B in the middle;

[0024] Figure 5 A schematic diagram of the stop structure;

[0025] Figure 6 This is a schematic diagram of a water-stopping device used in pipe jacking construction with a double-layer water-stopping ring structure.

[0026] Figure 7 This is a partial structural schematic diagram of a water-stopping device used in pipe jacking construction in another embodiment.

[0027] In the figure: 1. Pit wall; 2. Water stop ring; 21. Reinforcing part; 3. Fixing plate; 31. Connecting part; 32. Restricting part; 33. Waist hole; 34. Threaded through hole; 4. Baffle; 5. Adjusting bolt; 6. Bolt 1; 7. Base plate; 8. Ring plate; 9. Bolt 2; 10. Sleeve; 11. Expansion bolt; 12. Flange. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] It should be noted that when a component is said to be "installed on" another component, it can be directly on the other component or it may be in a component that is centered on it. When a component is said to be "set on" another component, it can be directly set on the other component or it may also be in a component that is centered on it. When a component is said to be "fixed to" another component, it can be directly fixed to the other component or it may also be in a component that is centered on it.

[0030] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "or / and" as used herein includes any and all combinations of one or more of the associated listed items.

[0032] Please refer to Figure 2 and Figure 3 This embodiment provides a water-stopping device for pipe jacking construction, which includes a water-stopping ring 2 installed at the opening on the foundation pit wall 1 via an installation structure, multiple stop structures, and a pressure gauge. The following is a detailed explanation of each structure and the relationship between them:

[0033] like Figure 4 As shown, the installation structure includes a base plate 7 and an annular plate 8. The base plate 7 is fixed to the pit wall 1 using expansion bolts 11, surrounding the opening in the pit wall 1 and providing a base for the installation of other components. A water-stop ring 2 is fitted onto the base plate 7, and is further improved by extending a reinforcing part 21 on its inner side. After installation, the reinforcing part 21 extends towards the interior of the opening. The reinforcing part 21 fits against the outer wall of the jacking pipe that will later extend into the opening, increasing the contact area and improving the sealing effect. Furthermore, the reinforcing part 21 abuts against the outer wall of the jacking pipe, making it less likely for the water-stop ring 2 to be pushed open by the pressure inside the pit. The annular plate 8 and the base plate 7 are located on either side of the water-stop ring 2. The annular plate 8 is positioned at the opening in the pit wall 1 and fixed to the base plate 7 using several bolts 9. At this point, the annular plate 8 and the base plate 7 clamp the water-stop ring 2 for fixed installation.

[0034] The stop structure is a key design feature of this invention. Multiple stop structures are evenly arranged along the circumference of the opening and installed on the side of the waterstop ring 2 away from the foundation pit wall 1 to prevent the waterstop ring 2 from overturning under pressure. Taking one stop structure as an example... Figure 5As shown, it includes: a fixed plate 3, a baffle 4, and two adjusting bolts 5. The baffle 4 is rotatably connected to the side of the fixed plate 3 near the water-stop ring 2. The rotatable connection point between the baffle 4 and the fixed plate 3 is used as the dividing line. One side of the fixed plate 3 located at the dividing line is set as a connecting part 31, and the other side is set as a limiting part 32. The area of ​​the connecting part 31 is larger than that of the limiting part 32 to prevent the limiting part 32 from being too long and affecting the installation of the jacking pipe. Two parallel waist holes 33 are opened in the area of ​​the connecting part 31. The two waist holes 33 are set along the length direction of the fixed plate 3, and the length direction of the waist holes 33 is towards the center of the water-stop ring 2. Bolts 6 are installed in both waist holes 33. The fixed plate 3 is detachably connected to the ring plate 8 by bolts 6, and the radial position of the fixed plate 3 (relative to the radial direction of the opening) can be adjusted through the waist holes 33. The function of the limiting part 32 is to limit the rotation angle of the baffle 4, so that the baffle 4 can only rotate inward relative to the opening and cannot rotate outward. Furthermore, two threaded through holes 34 are provided in the limiting part 32 area. Two adjusting bolts 5 are respectively set in the two threaded through holes 34. By rotating the adjusting threads, their relative positions on the fixed plate 3 are adjusted so that the ends of the adjusting bolts 5 abut against the baffle 4, thereby adjusting the rotation angle range of the baffle 4. The shape of the fixed plate 3 can be set as rectangular or trapezoidal, and the shape of the baffle 4 can be set as rectangular to facilitate production and installation. At the same time, the length of the baffle 4 can be set to be greater than half the length of the fixed plate 3, so that the baffle 4 is easier to adjust to abut against the water-stop ring 2, preventing the water-stop ring 2 from turning outward due to the baffle 4 being too short. In use, one side of the baffle 4 abuts against the outer side of the water-stop ring 2, and the other side abuts against the end of the adjusting bolt 5. The rigid structure of the baffle 4 prevents the water-stop ring 2 from turning outward. One stop structure can only play a partial blocking role, so multiple stop structures are required to work together. During installation, the interval between adjacent fixing plates 3 can be set to 20-100mm, which can achieve a good blocking effect while reducing the number of stop structures.

[0035] The pressure gauge can be a diaphragm pressure gauge, with its probe inserted between the jacking pipe and the inner wall of the opening to monitor the pressure on the side of the waterstop ring 2 near the foundation pit wall 1.

[0036] In another embodiment, the stop structure is consistent with the embodiment described above. For example... Figure 6As shown, the water-stopping device for pipe jacking construction can adopt a double-layer water-stop ring 2 structure, which includes two water-stop rings 2 arranged on the same axis. The two water-stop rings 2 are connected by a sleeve 10. One end of the sleeve 10 is connected to the ring plate 8 and fixes one water-stop ring 2. The other end of the sleeve 10 is clamped and fixed to the other water-stop ring 2 by a ring plate 8, thus forming a double-layer water-stop ring 2 structure. A stop structure is installed on the outer side (i.e., the side away from the foundation pit wall 1) of the ring plate 8 to further enhance the sealing effect of the water-stopping device for pipe jacking construction, and it has strong pressure resistance and will not easily cause sealing failure.

[0037] In another embodiment, the stop structure may further include a fixing plate 3 and a baffle 4. The fixing plate 3, as in the embodiments described above, is detachable from the mounting structure. Figure 7 The difference lies in that the baffle 4 is welded and fixed to the fixing plate 3. After being fixed, the baffle 4 is inclined towards the side of the water-stop ring 2, abutting against the water-stop ring 2, and the end of the baffle 4 away from the fixing plate 3 is flush with the inner side of the water-stop ring 2. This design allows one side of the baffle 4 to contact the outer wall of the pipe. Combined with the inclined design of the baffle 4, when the inner pressure of the water-stop ring 2 is too great and squeezes the baffle 4, the excessive pressure may force the baffle 4 to forcibly flip. At this time, since the end of the baffle 4 is blocked by the outer wall of the pipe, the flipping of the baffle 4 is restricted, thereby further increasing the blocking performance and reducing the possibility of sealing failure.

[0038] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A water-stopping device for pipe jacking construction, comprising at least one water-stopping ring (2) installed at an opening in the foundation pit wall (1) via an installation structure, characterized in that, The water-stopping device for pipe jacking construction also includes multiple stop structures; the multiple stop structures are circumferentially arranged on the side of the water-stopping ring (2) away from the foundation pit wall (1) to prevent the water-stopping ring (2) from turning outward toward the opening; The stop structure includes a fixed plate (3) and a baffle (4); the fixed plate (3) is detachably connected to the installation structure; the baffle (4) is fixed on the fixed plate (3), and the baffle (4) is inclined toward the side of the water-stop ring (2), so that the baffle (4) abuts against the side of the water-stop ring (2) away from the foundation pit wall (1).

2. The water-stopping device for pipe jacking construction according to claim 1, characterized in that, The stop structure includes: a fixed plate (3), a baffle (4) and at least one adjusting bolt (5); the fixed plate (3) is detachably connected to the mounting structure; the fixed plate (3) has a threaded through hole (34); the baffle (4) is rotatably connected to the side of the fixed plate (3) near the water-stop ring (2), and one side of the baffle (4) abuts against the outer side of the water-stop ring (2); the adjusting bolt (5) is screwed to the fixed plate (3) through the threaded through hole (34), and the end of the adjusting bolt (5) abuts against the side of the baffle (4) away from the water-stop ring (2).

3. The water-stopping device for pipe jacking construction according to claim 2, characterized in that, The dividing line is the rotatable connection between the baffle (4) and the fixed plate (3); the fixed plate (3) is provided with a connecting part (31) on one side of the dividing line and a limiting part (32) on the other side, and the area of ​​the connecting part (31) is larger than that of the limiting part (32).

4. The water-stopping device for pipe jacking construction according to claim 3, characterized in that, Two parallel waist holes (33) are provided on the connecting part (31); the length direction of the waist holes (33) is towards the center of the water-stop ring (2); each of the two waist holes (33) is provided with a bolt (6); the fixing plate (3) is connected to the mounting structure by the bolt (6).

5. The water-stopping device for pipe jacking construction according to claim 1, characterized in that, The stop structure includes: a fixed plate (3) and a baffle (4); the fixed plate (3) is detachably connected to the mounting structure; the baffle (4) is fixedly connected to the fixed plate (3); the baffle (4) is inclined toward the water-stop ring (2), and the end of the baffle (4) away from the fixed plate (3) is flush with the inner side of the water-stop ring (2).

6. The water-stopping device for pipe jacking construction according to claim 2 or 5, characterized in that, The shape of the fixing plate (3) is set to rectangular or trapezoidal; the shape of the baffle (4) is set to rectangular.

7. The water-stopping device for pipe jacking construction according to claim 2 or 5, characterized in that, The interval between adjacent fixing plates (3) is 20-100mm.

8. The water-stopping device for pipe jacking construction according to claim 1, characterized in that, The water-stopping device for pipe jacking construction also includes a pressure gauge, which is used to monitor the pressure on the side of the water-stop ring (2) near the foundation pit wall (1).

9. The water-stopping device for pipe jacking construction according to claim 2 or 5, characterized in that, The installation structure includes: a base plate (7) and an annular plate (8); the base plate (7) is connected to the pit wall (1); a water-stop ring (2) is set between the base plate (7) and the annular plate (8); the annular plate (8) is connected to the base plate (7) by several bolts (9) and clamps and fixes the water-stop ring (2); The fixing plate (3) is detachably connected to the ring plate (8).

10. The water-stopping device for pipe jacking construction according to claim 1, characterized in that, Two water-stop rings (2) are provided and are set on the same axis; the two water-stop rings (2) are connected by a sleeve (10); a stop structure is provided on the water-stop ring (2) on the side away from the foundation pit wall (1) to prevent the water-stop ring (2) from turning outward toward the opening.

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