Pipe roofing steel pipe locking device

Abstract

The utility model provides a pipe roofing steel pipe locking device which comprises a first pipe roofing steel pipe, a second pipe roofing steel pipe and a water stop grouting locking device. The male lock catch and the female lock catch are externally welded to connect the two pipe roofing steel pipes to form a unified whole, so that the bearing capacity of the pipe roofing is improved, and the danger in the construction process is reduced. The two lock catches adopt arc sections with different radiuses, a certain gap is reserved between the two lock catches, the first pipe-roofing steel pipe and the second pipe-roofing steel pipe are tightly connected together, the stability of the pipe-roofing structure is improved, angle adjustment between the pipe-roofing steel pipes can be achieved by adjusting the lengths of the upper end and the lower end of the female lock catch, pipe roofs of different forms are formed on the premise that the overall stability of the supporting structure is not affected, and the supporting structure is more stable. The construction is simpler and more convenient, the soil body between the pipe roofing structures is reinforced by externally welding the grouting pipes and after grouting, soil body collapse during construction is prevented, the overall leakproofness of the pipe roofing structures is improved, and the stable and continuous waterproof curtain is formed by arranging the grouting holes and the grouting pipes inside and outside and conducting grouting in multiple times.

Description

Technical Field

[0001] The utility model relates to the field of pipe curtain pre-support construction, in particular to a pipe curtain steel pipe locking device. Background Art

[0002] With the continuous development of underground space, the application of dark excavation construction in urban rail transit technology is becoming more and more widespread. Pipe curtain support, as a means of advance pre-support, is often used in underground construction projects. In the traditional pipe curtain advance pre-support system, two adjacent pipe curtain steel pipes are usually connected by locks to form a protective water-stop curtain. However, the original lock forms are mostly L-shaped or I-shaped, and the pipe curtain form is relatively simple. When constructing an arc curtain structure, this method is easily affected by external forces, resulting in a decrease in overall strength; and a simple lock connection cannot effectively form a continuous pipe-roof water-stop curtain, and the waterproof performance is lacking. Utility Model Content

[0003] The utility model aims at the deficiencies of the above-mentioned prior art, and aims to provide a pipe curtain steel pipe locking device, which connects two pipe curtain steel pipes by externally welding male and female locking buckles to form a unified whole, improves the bearing capacity of the pipe curtain, and reduces the danger of the construction process. The two locking buckles adopt arc segments of different radii, and reserve a certain gap in the middle to tightly connect the first and second pipe curtain steel pipes together to improve the stability of the pipe curtain structure. By adjusting the upper and lower end lengths of the female locking buckle, the angle between the pipe curtain steel pipes can be adjusted. Under the premise of not affecting the overall stability of the support structure, different forms of pipe curtains are formed, and grouting reinforcement is performed to make the construction easier. By externally welding the grouting pipe, the soil between the pipe curtain structure is reinforced after grouting to prevent soil collapse during construction, and improve the overall airtightness of the pipe curtain structure. By setting different forms of grouting holes and grouting pipes both inside and outside, grouting is performed in batches to form a stable and continuous water-stop curtain. Double grouting on the inside and outside forms a pipe curtain protection layer of sufficient thickness, which can effectively improve the overall strength of the pipe curtain, form a continuous pipe curtain water-stop curtain, and improve the waterproofness of the structure.

[0004] In order to achieve the purpose of this utility model, the technical solution adopted is:

[0005] A pipe curtain steel pipe locking device comprises a first pipe curtain steel pipe, a second pipe curtain steel pipe and a water-stop grouting locking device; the water-stop grouting locking device is in an arc shape, comprising a male locking buckle and a female locking buckle, the male locking buckle is welded to one side of the first pipe curtain steel pipe, the female locking buckle is welded to the first pipe curtain steel pipe, the second pipe curtain steel pipe is welded to the male locking buckle on the first pipe curtain steel pipe at the connection position with the female locking buckle, and the other side is welded to the male locking buckle, and the male locking buckle is installed inside the female locking buckle; the female locking buckle between the first pipe curtain steel pipe and the second pipe curtain steel pipe is welded to an external grouting pipe at the connection between the two pipe curtain steel pipes, the female locking buckle comprises a female locking buckle long end and a female locking buckle short end, and the female locking buckle long end and the female locking buckle short end differ in arc circumference by α / 360°.

[0006] As a further solution of the utility model, the male lock buckle and the female lock buckle are configured as arc-shaped lock buckles, which are respectively fixed to the first pipe curtain steel pipe and the second pipe curtain steel pipe by welding with arc segments of different diameters.

[0007] As a further solution of the utility model, the long end of the female lock buckle and the short end of the female lock buckle are both arc-shaped structures with the same radius, and their installation circles overlap and differ in arc circumference by α / 360°, where α≤90°.

[0008] As a further solution of the utility model, grouting water-stop curtains are provided inside and outside the male locking buckle and the female locking buckle between the first pipe curtain steel pipe and the second pipe curtain steel pipe, and the grouting water-stop curtains fix the first pipe curtain steel pipe, the second pipe curtain steel pipe, the male locking buckle and the female locking buckle.

[0009] As a further solution of the utility model, the water-stop grouting locking buckle device adopts an inner-reinforced arc plate structure, in which the male locking buckle is reserved with a plum blossom-shaped grouting hole, through which the grouting is supplemented when grouting the external grouting pipe.

[0010] The utility model provides a pipe curtain steel pipe locking device, which has the following advantages:

[0011] 1. In the utility model, the two pipe curtain steel pipes are connected by externally welding male and female lock buckles to form a unified whole, thereby improving the bearing capacity of the pipe curtain and reducing the danger of the construction process. The two lock buckles adopt arc segments of different radii, and a certain gap is reserved in the middle to tightly connect the first and second pipe curtain steel pipes together, thereby improving the stability of the pipe curtain structure.

[0012] 2. In the utility model, by adjusting the length of the upper and lower ends of the female lock buckle, the angle between the steel pipes of the pipe curtain can be adjusted. Under the premise of not affecting the overall stability of the supporting structure, different forms of pipe curtains can be formed, and grouting reinforcement can be performed to make the construction easier.

[0013] 3. In the present invention, the soil between the pipe-curtain structures is reinforced after grouting by externally welding the grouting pipe, thereby preventing the soil from collapsing during construction and improving the overall airtightness of the pipe-curtain structure.

[0014] 4. In the utility model, different forms of grouting holes and grouting pipes are arranged inside and outside, and grouting is performed in batches to form a stable and continuous water-stop curtain. Double grouting inside and outside forms a pipe curtain protective layer of sufficient thickness, which can effectively improve the overall strength of the pipe curtain, form a continuous pipe-roof water-stop curtain, and improve the waterproofness of the structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 It is a structural schematic diagram of a single tube curtain steel pipe in the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the female lock in the utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the lock buckle after grouting in the utility model;

[0019] Figure 5 It is a schematic diagram of the structure after the external soil is reinforced by the grouting pipe in the utility model.

[0020] Figure 6 It is a schematic diagram of the overall structure after jacking proposed by the utility model.

[0021] In the figure: 1. First pipe curtain steel pipe; 2. Second pipe curtain steel pipe; 3. Male locking buckle; 4. Female locking buckle; 41. Long end of female locking buckle; 42. Short end of female locking buckle; 5. External grouting pipe. DETAILED DESCRIPTION

[0022] The utility model is further elaborated and illustrated below in conjunction with specific embodiments and the accompanying drawings of the specification.

[0023] In order to make the purpose, technical solution and advantages of the utility model more clear, the present invention is further described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0024] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "horizontal", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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, and therefore cannot be understood as a limitation on the present invention.

[0025] like Figure 1-6 As shown, a pipe curtain steel pipe locking device comprises a first pipe curtain steel pipe 1, a second pipe curtain steel pipe 2 and a water-stop grouting locking device; the water-stop grouting locking device is in an arc shape, comprising a male locking buckle 3 and a female locking buckle 4, the male locking buckle 3 is welded to one side of the first pipe curtain steel pipe 1, the female locking buckle 4 is welded to the first pipe curtain steel pipe 1, the second pipe curtain steel pipe 2 is welded to the female locking buckle 4 at the connection position with the male locking buckle 3 on the first pipe curtain steel pipe 1, and the other side is welded to the male locking buckle 3, and the male locking buckle 3 is installed inside the female locking buckle 4; the female locking buckle 4 between the first pipe curtain steel pipe 1 and the second pipe curtain steel pipe 2 is welded to an external grouting pipe 5 at the connection between the female locking buckle 4 and the second pipe curtain steel pipe 2, the female locking buckle 4 comprises a female locking buckle long end 41 and a female locking buckle short end 42, and the female locking buckle long end 41 and the female locking buckle short end 42 differ in arc circumference by α / 360°.

[0026] like Figure 1-6 As shown, a pipe curtain steel pipe locking device, the male locking buckle 3 and the female locking buckle 4 are configured as arc-shaped locking buckles, which are respectively fixed on the first pipe curtain steel pipe 1 and the second pipe curtain steel pipe 2 by welding with arc segments of different diameters, the long end 41 of the female locking buckle and the short end 42 of the female locking buckle are both arc-shaped structures with the same radius, and their installation circles coincide with each other, and the arc circumference differs by α / 360°, wherein α≤90°, and the inside and outside of the male locking buckle 3 and the female locking buckle 4 between the first pipe curtain steel pipe 1 and the second pipe curtain steel pipe 2 are both provided with grouting water-stop curtains, which fix the first pipe curtain steel pipe 1, the second pipe curtain steel pipe 2, the male locking buckle 3 and the female locking buckle 4, and the water-stop grouting locking buckle device adopts an inner rib arc plate structure, wherein the male locking buckle 3 is reserved with a plum blossom-shaped grouting hole, and the grouting is supplemented when the external grouting pipe 5 is grouted.

[0027] During operation, the male lock buckle 3, the female lock buckle 4, and the external grouting pipe 5 are connected to the first pipe curtain steel pipe 1 and the second pipe curtain steel pipe 2 by welding. The male lock buckle 3 can reserve a certain number of grouting holes, and two external grouting pipes 5 are welded on the female lock buckle 4 and the second pipe curtain steel pipe 2; both lock buckles are arc-shaped, but the sizes are slightly different, which can make the lock buckles bite more tightly; only the male lock buckle 3 is welded on the initial pipe curtain steel pipe, the male lock buckle 3 and the female lock buckle 4 are welded on the middle steel pipe, and only the male lock buckle 3 is welded on the end steel pipe;

[0028] The initial pipe curtain with only male lock buckle 3 is pre-jacked. At this time, the male lock buckle 3 plays a guiding role. Then, the middle pipe curtain with male and female lock buckles welded is jacked in the locking direction. After a certain length of construction, the end pipe curtain with only female lock buckle 4 and external grouting pipe 5 is jacked. The lock buckles between different pipe curtains form a bite state, and finally a closed pipe curtain is formed.

[0029] During the jacking process, lubricant is applied to the joints of the male and female locks to reduce friction. After the jacking process is completed, the soil outside the pipe curtain is reinforced by grouting, and the cavity inside the male and female locks is filled with grouting to form two internal and external protections, so that the pipe curtain pre-support system forms a continuous water-stop curtain, improves the airtightness of the pipe curtain structure, and effectively prevents soil collapse and water penetration;

[0030] The two lock buckles are arc-shaped structures, but the arc radius is different. The radius of the female lock buckle is slightly larger than that of the male lock buckle, and the arc lengths of the upper and lower lock buckles are different. By adjusting the connection angles of the male and female lock buckles, different forms of overall pipe curtains are formed, which makes construction easier. The lock buckle is made of inner rib plate material, which has better stress performance. Some grouting holes can be reserved on the male lock buckle 3 so that the slurry can better fill the cavity of the male and female lock buckles to form a complete water-stop curtain. The grouting holes are preset inside the pipe curtain, and the grouting is used to fill the cavity after the pipe curtain steel pipe is pushed in, which has a better water-stopping effect.

[0031] In the utility model, the two pipe curtain steel pipes are connected by externally welding male and female lock buckles to form a unified whole, thereby improving the bearing capacity of the pipe curtain and reducing the danger of the construction process. The two lock buckles adopt arc segments of different radii, and a certain gap is reserved in the middle to tightly connect the first and second pipe curtain steel pipes together to improve the stability of the pipe curtain structure. By adjusting the upper and lower end lengths of the female lock buckle, the angle between the pipe curtain steel pipes can be adjusted. Under the premise of not affecting the overall stability of the support structure, different forms of pipe curtains are formed, and grouting reinforcement is performed to make the construction easier. By externally welding grouting pipes, the soil between the pipe curtain structures is reinforced after grouting to prevent soil collapse during construction and improve the overall airtightness of the pipe curtain structure. By arranging different forms of grouting holes and grouting pipes both inside and outside, grouting is performed in batches to form a stable continuous water-stop curtain. Double grouting inside and outside forms a pipe curtain protective layer of sufficient thickness, which can effectively improve the overall strength of the pipe curtain, form a continuous pipe curtain water-stop curtain, and improve the waterproofness of the structure.

[0032] The technical solutions disclosed in the embodiments of the present invention are introduced in detail above. The principles and implementation methods of the embodiments of the present invention are explained in detail using specific embodiments. The description of the above embodiments is only applicable to help understand the principles of the embodiments of the present invention. At the same time, for those skilled in the art, according to the embodiments of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A pipe curtain steel pipe locking device, characterized in that: It comprises a first pipe curtain steel pipe (1), a second pipe curtain steel pipe (2) and a water-stop grouting locking device; The water-stop grouting lock buckle device is in an arc shape and comprises a male lock buckle (3) and a female lock buckle (4); the male lock buckle (3) is welded to one side of the first pipe curtain steel pipe (1), and the female lock buckle (4) is welded to the first pipe curtain steel pipe (1); the second pipe curtain steel pipe (2) is welded to the female lock buckle (4) at the connection position with the male lock buckle (3) on the first pipe curtain steel pipe (1), and the other side is welded to the male lock buckle (3); the male lock buckle (3) is installed inside the female lock buckle (4); An external grouting pipe (5) is welded to the connection between the female locking buckle (4) between the first tube curtain steel pipe (1) and the second tube curtain steel pipe (2) and the second tube curtain steel pipe (2), and the female locking buckle (4) includes a female locking buckle long end (41) and a female locking buckle short end (42), and the female locking buckle long end (41) and the female locking buckle short end (42) differ in arc circumference by α / 360°.

2. The pipe curtain steel pipe locking device according to claim 1, characterized in that: The male lock buckle (3) and the female lock buckle (4) are configured as arc-shaped lock buckles, and are respectively fixed to the first pipe curtain steel pipe (1) and the second pipe curtain steel pipe (2) by welding with arc segments of different diameters.

3. The pipe-roof steel pipe locking device according to claim 1, characterized in that: The female locking buckle long end (41) and the female locking buckle short end (42) are both arc-shaped structures with the same radius, and their installation circles overlap and differ in arc circumference by α / 360°, wherein α≤90°.

4. The pipe-roof steel pipe locking device according to claim 1, characterized in that: Grouting water-stopping curtains are provided inside and outside the male locking buckle (3) and the female locking buckle (4) between the first pipe curtain steel pipe (1) and the second pipe curtain steel pipe (2), and the grouting water-stopping curtains fix the first pipe curtain steel pipe (1), the second pipe curtain steel pipe (2), the male locking buckle (3) and the female locking buckle (4) in connection.

5. The pipe-roof steel pipe locking device according to claim 1, characterized in that: The water-stop grouting lock buckle device adopts an inner rib arc plate structure, wherein the male lock buckle (3) is reserved with a plum blossom-shaped grouting hole, and the plum blossom-shaped grouting hole is used to supplement the grouting when grouting the external grouting pipe (5).

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