Grouting device for pipe jacking construction

Abstract

The utility model discloses a grouting device for pipe-jacking construction, which relates to the technical field of pipe-jacking construction, and comprises a grouting pipe and an L-shaped guide pipe, the grouting pipe is semi-annular and is welded with the upper part of the outer wall of a steel socket of a reinforced concrete pipe, one end of the L-shaped guide pipe is connected with the middle part of the grouting pipe in a penetrating manner, and the other end of the L-shaped guide pipe is welded with the outer wall of the steel socket of the reinforced concrete pipe. The other end of the grouting pipe penetrates through the outer wall of the reinforced concrete pipe, extends inwards and is connected with a grouting pipeline; a plurality of small grouting holes are formed in the grouting pipe and close to the grouting pipe. The utility model provides a grouting device for pipe jacking construction, which can uniformly inject anti-drag slurry to the outer wall of a pipeline, fill a gap between the outer wall of a pipe joint and a surrounding soil body, reinforce a surrounding sand layer and form a complete slurry sleeve so as to reduce frictional resistance between the pipe joint and the soil body and avoid the problem that a slurry hole is too close to a water stop rubber ring. Therefore, the difficulty and risk in the jacking process are reduced, and the construction efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of pipe jacking construction technology, specifically a grouting device for pipe jacking construction. Background Technology

[0002] Pipe jacking is a method of pipeline construction that involves laying underground pipelines with little or no excavation. It primarily utilizes jacking equipment to generate forward momentum, balancing the friction between the pipe and the soil, allowing the pipe to advance. Simultaneously, it requires replacing the soil occupied by the pipe, ultimately forming a pipeline within the soil. Grouting plays a crucial role in pipe jacking technology.

[0003] Currently, during the construction of large-diameter reinforced concrete pipe jacking, excessive friction during sand layer construction, uneven grout distribution during grouting, and incomplete mud sleeve formation can easily lead to problems such as increased frictional resistance, pipe damage, ground settlement, and pipe deviation during pipe jacking. This not only increases the resistance during jacking but may also cause pipe instability or even rupture, reducing construction efficiency.

[0004] Based on this, this application designs a grouting device for pipe jacking construction. Utility Model Content

[0005] The purpose of this utility model is to provide a grouting device for pipe jacking construction to solve the problems of uneven grout distribution and incomplete mud sleeve formation during the grouting process of pipe jacking construction.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A grouting device for pipe jacking construction includes a grouting pipe and an L-shaped guide pipe. The grouting pipe is semi-circular and welded to the upper part of the outer wall of the steel socket of the reinforced concrete pipe. One end of the L-shaped guide pipe is connected to the middle of the grouting pipe, and the other end extends inward through the outer wall of the reinforced concrete pipe and is connected to the grouting pipe. Several small grouting holes are provided on the grouting pipe.

[0008] As a further improvement to the above scheme, the grouting pipe is made of 4-point galvanized steel pipe with a length of 6m.

[0009] As a further improvement to the above solution, the grouting hole is located on the side of the grouting pipe, close to the concrete pipe.

[0010] As a further improvement to the above scheme, the diameter of the grouting hole is 10mm and the distance between two adjacent grouting holes is 200mm.

[0011] As a further improvement to the above solution, the diameters of the two ends of the grouting pipe are reduced to be equal to the diameter of the grouting holes, ensuring that the grout output of each hole is uniform.

[0012] As a further improvement to the above solution, the L-shaped conduit consists of two 140mm and 300mm galvanized steel pipes and a DN15 galvanized pipe fitting.

[0013] As a further improvement to the above solution, the steel socket is composed of a steel ring with a width of 250mm and a thickness of 10mm.

[0014] Compared with the prior art, the beneficial effects of this utility model are:

[0015] This utility model provides a grouting device for pipe jacking construction, which can uniformly inject drag-reducing slurry into the outer wall of the pipe, fill the gap between the outer wall of the pipe section and the surrounding soil, reinforce the surrounding sand layer, and form a complete slurry sleeve, thereby reducing the frictional resistance between the pipe section and the soil, avoiding the problem of the slurry hole being too close to the water-stop rubber ring, thus reducing the difficulty and risk in the jacking process and improving the construction efficiency. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of a grouting device used in pipe jacking construction.

[0017] Figure 2 This is a schematic diagram of the grouting pipe and L-shaped guide pipe in a grouting device used for pipe jacking construction.

[0018] Figure 3 This is a side view of a grouting device used in pipe jacking construction.

[0019] Figure 4 This is a top view of a grouting device used in pipe jacking construction.

[0020] Figure 5 for Figure 1 A magnified structural diagram of A in the middle.

[0021] In the diagram: 1. Grouting pipe; 2. Steel socket; 3. L-shaped guide pipe; 4. Rubber ring groove; 5. Reinforced concrete pipe. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] Reference Figures 1-5A grouting device for pipe jacking construction includes a grouting pipe 1 and an L-shaped conduit 3. The grouting pipe 1 is semi-circular and welded to the upper part of the outer wall of the steel socket 2 of the reinforced concrete pipe 5. One end of the L-shaped conduit 3 is connected to the middle of the grouting pipe 1, and the other end extends inward through the outer wall of the reinforced concrete pipe 5 and is connected to the grouting pipe (not shown in the figure). Several small grouting holes are provided near the grouting pipe 1.

[0024] In this embodiment, the grouting pipe 1 is a 4-point galvanized steel pipe with a length of 6m.

[0025] In this embodiment, the grouting holes are located on the side of the grouting pipe 1, close to the reinforced concrete pipe 5. The diameter of the grouting holes is 10 mm, and the distance between two adjacent grouting holes is 200 mm.

[0026] In this embodiment, the diameters of the two ends of the grouting pipe 1 are reduced to be equal to the diameter of the grouting hole, ensuring that the grout output of each hole is uniform.

[0027] In this embodiment, the L-shaped conduit 3 consists of two 140mm and 300mm galvanized steel pipes and a DN15 galvanized pipe fitting. The two galvanized steel pipes are threaded to both ends of the DN15 galvanized pipe fitting to form an L-shaped conduit.

[0028] In this embodiment, the reinforced concrete pipe 5 is a Class III reinforced concrete pipe with a diameter of DN2400mm. One end of the reinforced concrete pipe 5 is provided with a steel socket 2, and the other end is provided with a rubber ring groove 4. The steel socket 2 is composed of a steel ring with a width of 250mm and a thickness of 10mm. A water-stop rubber ring is installed in the rubber ring groove 4 to achieve a sealing connection between the pipes.

[0029] Work process:

[0030] ① Drill holes in the reinforced concrete pipe 5 with a water drill, and splice the L-shaped guide pipe 3 together. Weld one end to the grouting pipe 1, and insert the other end into the pipe hole to connect with the grouting pipe.

[0031] ② Weld the grouting pipe 1 tightly to the outside of the steel socket 2, with one worker welding and another worker supporting and straightening it;

[0032] ③ During the welding process, small grouting holes are punched in the grouting pipe 1 every 200mm using a welding machine, and the diameter of both ends of the grouting pipe 1 is reduced to ensure that the grout output of each hole is uniform.

[0033] ④ Position the reinforced concrete pipe 5 correctly and lower it into the working shaft to begin pipe jacking construction.

[0034] ⑤ Grouting should be carried out in a timely manner during construction. According to the soil conditions, appropriate bentonite should be selected, and grout should be injected every 1-3 reinforced concrete pipes in a timely manner to reduce early settlement and play a better lubricating role.

[0035] ⑥ Adjust the grout mix ratio according to the different needs of the soil layers being traversed. The longer the grouting pipe, the thinner the grout. The grout should be thicker for sandy soil than for silty soil.

[0036] This utility model provides a grouting device for pipe jacking construction, which can uniformly inject drag-reducing slurry into the outer wall of the pipe, fill the gap between the outer wall of the pipe section and the surrounding soil, reinforce the surrounding sand layer, and form a complete slurry sleeve, thereby reducing the frictional resistance between the pipe section and the soil, avoiding the problem of the slurry hole being too close to the water-stop rubber ring, thus reducing the difficulty and risk in the jacking process and improving the construction efficiency.

[0037] It should be noted that, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, the phrase "comprising an element defined as..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0038] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A grouting device for pipe jacking construction, characterized in that, It includes a grouting pipe (1) and an L-shaped conduit (3). The grouting pipe (1) is semi-circular and welded to the upper part of the outer wall of the steel socket (2) of the reinforced concrete pipe (5). One end of the L-shaped conduit (3) is connected to the middle of the grouting pipe (1), and the other end extends inward through the outer wall of the reinforced concrete pipe (5) and is connected to the grouting pipe. Several small grouting holes are provided on the grouting pipe (1) near it.

2. The grouting device for pipe jacking construction according to claim 1, characterized in that, The grouting pipe (1) is made of 4-point galvanized steel pipe with a length of 6m.

3. A grouting device for pipe jacking construction according to claim 1, characterized in that, The grouting hole is located on the side of the grouting pipe (1) near the reinforced concrete pipe (5).

4. A grouting device for pipe jacking construction according to claim 3, characterized in that, The diameter of the grouting hole is 10mm, and the distance between two adjacent grouting holes is 200mm.

5. A grouting device for pipe jacking construction according to claim 4, characterized in that, The diameters of the two ends of the grouting pipe (1) are reduced to be equal to the diameter of the grouting hole.

6. A grouting device for pipe jacking construction according to claim 1, characterized in that, The L-shaped conduit (3) consists of two 140mm and 300mm galvanized steel pipes and a DN15 galvanized pipe fitting. The two galvanized steel pipes are threaded to both ends of the DN15 galvanized pipe fitting to form an L-shaped conduit.

7. A grouting device for pipe jacking construction according to claim 1, characterized in that, The steel socket (2) is composed of a steel ring with a width of 250 mm and a thickness of 10 mm.

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