Anti-gushing device for round jacking pipe starting hole

Abstract

The utility model discloses an anti-gushing device for a circular jacking pipe starting hole, and relates to an underground pipeline engineering construction technology. A well supporting structure is arranged at the round pipe jacking starting hole, a well lining wall is further arranged on the outer side of the well supporting structure, and anchoring steel bars are arranged in the well lining wall. The anti-gushing device comprises a hole opening steel ring, a front end water stop steel ring, a positioning lantern ring, a shield tail brush, rubber curtain cloth and a plurality of pressing plates; the cross section of the front-end water-stopping steel ring is in an L shape, the front end face of the front-end water-stopping steel ring is connected with the anchoring steel bar, the rear end face of the front-end water-stopping steel ring is fixedly connected with the hole opening steel ring, and the positioning lantern ring is arranged in a ring hole of the front-end water-stopping steel ring; the shield tail brush is arranged on the same circumference of the inner wall of the hole steel ring and is arranged at the rear part of the positioning lantern ring; the anti-gushing structure has the remarkable advantages of simple structure, more convenience in construction, low cost, good anti-gushing effect and the like.

Description

Technical Field

[0001] The utility model relates to the construction technology of underground pipelines, in particular to the improvement of the anti-gushing device for the circular pipe jacking construction opening. Background Art

[0002] In recent years, the pipe jacking construction technology has developed rapidly in the field of underground pipeline engineering in China. This technology has the advantages of small disturbance to the soil body during construction, controllable ground settlement, high degree of mechanization, high safety efficiency, low carbon and energy saving, etc., and has become one of the optimal methods for trenchless construction of underground pipelines. During the implementation of this technology, the specific technical measures taken by the opening water stop device are crucial for whether the pipe jacking can smoothly enter and exit the hole and the reliability of the opening seal during the pipe jacking process, which is usually the weak link of pipe jacking construction.

[0003] The existing water stop device for the circular pipe jacking starting opening has a complex structure and troublesome construction operation. Especially when encountering high water pressure and water-rich sand layers, the opening sealing effect is not ideal. For example, in the existing patent: "CN209704596U, Water Stop Device for Pipe Jacking Construction Opening", in this patented technology, firstly, the steel seal door 2 is difficult to pre-embed and install in actual construction, and the operation space is limited, so the water stop effect may not be good; secondly, the anchor reinforcement bars 7 are not reasonably arranged, which easily leads to poor fixing effect of the pre-embedded connection plate 3; thirdly, the pushing and pressing plate 10 is arranged inside the rubber curtain plate 4, which limits the movement space of the rubber curtain plate 4, and is more likely to cause the rubber curtain plate 4 to be worn and cracked faster during pipe jacking construction, resulting in gushing in the well when encountering high water pressure and water-rich sand layer conditions.

[0004] Another example is "CN106703841A, A Water Stop Device for the Entrance of a Pipe Jacking Tunnel". The water stop device provided by this patented technology has a complex structure and inconvenient operation. There are 2 layers of annular steel plates 3 outside the curtain-type rubber flange water stop ring 2, and an inflatable rubber water stop ring 5 is arranged inside. If the inner curtain-type rubber flange water stop ring 2 is worn, it is inconvenient to repair and replace, which is equivalent to the failure of the first waterproof layer. When encountering high water pressure and water-rich sand layers, only using the second waterproof structure, the inflatable rubber water stop ring 5, for water stop cannot achieve the effect of anti-seepage and anti-gushing.

[0005] In summary, how to optimize and improve the water stop device for the starting opening so that it can adapt to the construction environment of high water pressure and water-rich sand layers and further improve the sealing effect of the starting opening on the premise of ensuring the smooth entry and exit of the pipe jacking equipment has become an urgent technical problem in this field. Content of the Utility Model

[0006] In view of the above technical problems, the utility model provides an anti-gushing device for the circular pipe jacking starting opening, which has a simple structure, convenient construction operation, low cost, and can effectively inhibit the gushing phenomenon at the opening.

[0007] The technical solution of the present utility model is as follows: A well support structure is provided at the starting hole of the circular pipe jacking. An inner lining wall of the well is further provided outside the well support structure, and anchoring steel bars are provided inside the inner lining wall of the well;

[0008] It further includes an anti-gushing device, and the anti-gushing device includes a hole steel ring, a front-end water-stop steel ring, a positioning collar, a tail seal brush, a rubber curtain cloth, and a number of pressing plates;

[0009] The cross-section of the front-end water-stop steel ring is in an L shape. The front end face of the front-end water-stop steel ring is connected to the anchoring steel bars, and the rear end face is fixedly connected to the hole steel ring. The positioning collar is arranged in the ring hole of the front-end water-stop steel ring;

[0010] The tail seal brush is arranged on the same circumference of the inner wall of the hole steel ring, and the tail seal brush is arranged behind the positioning collar;

[0011] A circle of rubber curtain cloth is arranged at the inner ring opening at the tail end of the hole steel ring, and a number of pressing plates are evenly arranged on the rubber curtain cloth.

[0012] Further, at least one oil injection pipe is opened on the outer wall of the hole steel ring, and the oil injection pipe is inserted into the inner cavity of the hole steel ring.

[0013] Further, at least one grouting pipe is further arranged behind the oil injection pipe.

[0014] Further, a long groove for penetrating a connecting member is opened in the middle of the pressing plate.

[0015] Further, after the inner lining wall of the well is cured, on the well support structure, a chiseling hole is opened according to the size matching the inner diameter of the pipe jacking machine until the hole reinforcement pile.

[0016] The present utility model relates to the technical field of underground pipeline engineering construction, and is a device that can be used for circular pipe jacking construction to prevent gushing at the hole. This device forms three highly efficient and tight hole water-stop and sealing structures by setting a positioning collar, a tail seal brush, and a rubber curtain cloth and cooperating with grease injection, mud injection, etc., to play the role of preventing gushing and leakage, and the adjustable pressing plate makes this water-stop device have a certain flexible adjustment ability. This device has the remarkable advantages of simple structure, more convenient construction, low cost, and good anti-gushing effect. Description of the Drawings

[0017] Figure 1 It is a structural schematic diagram of the present utility model,

[0018] Figure 2 is Figure 1 the view in the direction of A in

[0019] Figure 3 is a schematic diagram of the use state of the present utility model;

[0020] In the figure: 1 is the hole reinforcement pile, 2 is the well support structure, 21 is the chiseling hole, 3 is the well inner lining wall, 31 is the anchor reinforcement, 4 is the pipe jacking machine, 5 is the anti-gushing device, 51 is the hole steel ring, 52 is the front-end water-stop steel ring, 53 is the positioning collar, 54 is the shield tail brush, 55 is the rubber curtain cloth, 56 is the pressing plate, 561 is the long groove, 57 is the grouting pipe, and 58 is the oil injection pipe;

[0021] Figure 1 The solid arrow in the figure indicates the advancing direction of the pipe jacking machine, Figure 3 The hollow arrow in the figure indicates the installation direction of the anti-gushing device. Specific embodiments

[0022] The technical solution of the present utility model will be further described below in conjunction with the accompanying drawings and through specific embodiments.

[0023] Among them, the accompanying drawings are only for illustrative purposes, showing only schematic diagrams, rather than actual diagrams, and should not be construed as a limitation of this patent; in order to better illustrate the embodiments of the present utility model, some components in the accompanying drawings will be omitted, enlarged or reduced, which do not represent the dimensions of the actual product; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the accompanying drawings may be omitted.

[0024] In the accompanying drawings of the embodiments of the present utility model, the same or similar reference numerals correspond to the same or similar components; in the description of the present utility model, it should be understood that if terms such as "upper", "lower", "left", "right", "inner", "outer", etc. are used to indicate the orientation or positional relationship, it is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, so the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and should not be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0025] In the description of the present utility model, unless otherwise clearly specified and limited, if terms such as "connection" are used to indicate the connection relationship between components, this term should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral body; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0026] Such as Figure 1-2As shown in the figure, the utility model is provided with a well support structure 2 at the starting hole of the circular pipe jacking. An inner well lining wall 3 is further provided outside the well support structure 2. Anchor reinforcement bars 31 are arranged inside the inner well lining wall 3. The front-end water-stop steel ring 52 is fixed to the inner well lining wall 3 through connecting members such as anchor reinforcement bars and bolts;

[0027] It further includes an anti-gushing device 5; the anti-gushing device 5 includes a hole steel ring 51, a front-end water-stop steel ring 52, a positioning collar 53, a tail seal brush 54, a rubber curtain cloth 55 and a number of pressing plates 56;

[0028] The cross-section of the front-end water-stop steel ring 52 is L-shaped. The front end face of the front-end water-stop steel ring 52 is connected to the anchor reinforcement bar 31 through a number of screws or similar connecting members. The rear end face is fixedly connected to the hole steel ring 51, which can be achieved by welding to make the two integrated. A positioning collar 53 is arranged in the ring hole of the front-end water-stop steel ring 52. The inner hole of the positioning collar 53 is adapted to the outer diameter of the pipe jacking machine 4. The clearance between the two is relatively small, having a "damping" effect, and can be used as the first anti-gushing structure, which can not only achieve the central positioning of the pipe jacking machine, but also prevent gushing and leakage of soil and water in the working well.

[0029] Tail seal brushes 54 are arranged on the inner wall of the hole steel ring 51 on the same circumference. The tail seal brushes 54 can be selected as wire waterproof brushes and are fixedly welded on the inner wall of the hole steel ring 51. Its effect can be regarded as the second anti-gushing structure. The tail seal brushes 54 are arranged behind the positioning collar 53;

[0030] A circle of rubber curtain cloth 55 (selected as flexible rubber material) is arranged at the inner ring opening at the tail end of the hole steel ring 51 as the third anti-gushing structure; a number of pressing plates 56 are evenly arranged on the rubber curtain cloth 55. Before pre-installation, the positioning collar 53 is fixedly arranged in the inner pipe of the L-shaped steel ring 52. The rubber curtain cloth 55 is installed on the hole steel ring 51 and fixed with bolts after covering the pressing plates 56.

[0031] Furthermore, at least one grease injection pipe 58 is opened on the outer wall of the hole steel ring 51. The grease injection pipe 58 penetrates through the hole steel ring 51. When the pipe jacking machine starts to enter the hole, injecting grease can play a role in lubrication and sealing.

[0032] Furthermore, at least one grouting pipe 57 is also arranged behind the grease injection pipe 58. Injecting slurry can assist the waterproof structure of the hole to prevent groundwater or sediment leakage.

[0033] The grease injection pipe 58 and the grouting pipe 57 are preferably evenly arranged along the circumference of the hole steel ring 51, and each is not less than four; when signs of water and sand gushing are found, quickly inject grease or slurry to make it flow into and fill the gaps between the inner wall of the hole steel ring 51, the tail seal brushes 54, the rubber curtain cloth 55 and the pipe jacking machine or pipe joints more evenly and quickly, playing an anti-gushing role.

[0034] Furthermore, a long groove 561 for penetrating the connecting member is provided in the middle of the pressing plate 56, which can achieve radial adjustment, facilitate flexible adjustment of the rubber curtain cloth, and also facilitate flexible adjustment of the length of the pressing plate, so that it is not easily brought into the hole together with the rubber curtain cloth during the jacking of the pipe jacking machine and the pipe section, and is not deformed or damaged due to long-term friction. Disassembly, installation and maintenance are more convenient.

[0035] To achieve water stop at the hole and improve the strength of the original soil, a hole reinforcement pile 1 is provided inside the well support structure 2. First, it serves as a water stop during the excavation construction of the working well foundation pit; second, it reduces the risk of water leakage when the pipe jacking machine starts. If the reinforcement effect is very poor, it is easy to cause the inability to construct the hole wall and the installation of the water stop sealing device; third, it improves the soil strength to prevent the pipe jacking machine from diving when starting.

[0036] Furthermore, after the well inner lining wall 3 is cured, a chiseling hole 21 is opened on the well support structure 2 according to the size matching the inner diameter of the pipe jacking machine 4 until the hole reinforcement pile 1.

[0037] As Figure 3 shown, a hole reinforcement pile 1 is installed at the hole, a well support structure 2 is arranged outside the hole reinforcement pile 1, and then a well inner lining wall 3 is arranged on the well support structure 2. When arranging the well inner lining wall 3, the anchor reinforcement 31 and the front-end water stop steel ring 52 need to be buried in advance. Then, the anti-gushing device 5 is installed, and the chiseling hole 21 is cut until the hole reinforcement pile 1. After completion, the pipe jacking machine 4 can be pushed into the inner hole of the device to start working.

[0038] It should be noted that the above specific embodiments are only the preferred embodiments of the present invention and the applied technical principles. Those skilled in the art should understand that based on the technical content disclosed in this application document, various modifications, equivalent replacements, changes, etc. can be made to the present invention. However, as long as these transformations do not deviate from the spirit of the present invention, they should be within the protection scope of the present invention. In addition, some terms used in the description and claims of this application are not restrictive, but are only for the convenience of description.

Claims

1. A gushing prevention device for a circular pipe jacking starting hole, wherein a well support structure (2) is provided at the circular pipe jacking starting hole, characterized in that: A well lining wall (3) is also provided on the outside of the well support structure (2), and anchoring steel bars (31) are provided inside the well lining wall (3); It also includes a gushing prevention device (5), the gushing prevention device (5) comprising a hole steel ring (51), a front end water stop steel ring (52), a positioning collar (53), a shield tail brush (54), a rubber curtain (55) and a plurality of pressure plates (56); The cross section of the front end water-stop steel ring (52) is L-shaped, the front end surface of the front end water-stop steel ring (52) is connected to the anchor steel bar (31), and the rear end surface is fixedly connected to the hole steel ring (51), and the positioning ring (53) is arranged in the ring hole of the front end water-stop steel ring (52); The shield tail brush (54) is provided on the same circumference of the inner wall of the hole steel ring (51), and the shield tail brush (54) is arranged at the rear of the positioning ring (53); A circle of rubber curtain cloth (55) is provided at the inner ring opening of the rear end of the hole steel ring (51), and a plurality of pressing plates (56) are evenly arranged on the rubber curtain cloth (55).

2. The anti-gushing device for the circular jacking hole according to claim 1 is characterized in that: At least one oil injection pipe (58) is provided on the outer wall of the hole steel ring (51), and the oil injection pipe (58) is inserted into the inner cavity of the hole steel ring (51).

3. The anti-gushing device for the circular jacking hole according to claim 2 is characterized in that: At least one grouting pipe (57) is also provided at the rear of the oil injection pipe (58).

4. The anti-gushing device for the circular jacking hole according to claim 1, characterized in that: A long groove (561) for penetrating the connecting piece is provided in the middle of the pressing plate (56).

Images