Horizontal drilling anti-gushing device for horizontal MJS construction method pile

Abstract

The utility model discloses a horizontal drilling anti-gushing device for a horizontal MJS construction method pile, which comprises a main pipe, a gate valve arranged at one end of the main pipe, a seat pipe arranged at the other end of the gate valve, a check ring arranged at the other end of the main pipe, a blocking cover arranged between the main pipe and the check ring, and a fourth water stop ring arranged between the blocking cover and the main pipe. A second water stop ring is arranged between the main pipe and the gate valve, and a third water stop ring is arranged between the gate valve and the seat pipe. A first pressure relief pipe and a second pressure relief pipe are installed on the seat pipe and the main pipe respectively, and a first pressure relief valve and a second pressure relief valve are installed on the first pressure relief pipe and the second pressure relief pipe respectively. According to the horizontal drilling gushing prevention device for the horizontal MJS construction method pile, a gap between a new diaphragm wall and an old diaphragm wall can be effectively filled, the dangerous case of water gushing and sand gushing in the drilling process of the horizontal MJS construction method pile can be effectively avoided, and the horizontal drilling gushing prevention device has the advantages of being reliable in structure, convenient to install and capable of being repeatedly used.

Description

Technical Field

[0001] The utility model relates to the technical field of anti-gushing, in particular to a horizontal MJS construction method pile horizontal drilling anti-gushing device. Background Art

[0002] MJS pile construction method is based on the traditional high-pressure jet grouting process. It uses a unique porous tube and front-end forming device to realize forced grouting in the hole and ground pressure monitoring. It controls the ground pressure by adjusting the forced grouting volume, so that deep mud discharge and ground pressure are reasonably controlled to ensure the stability of ground pressure. It reduces the possibility of surface deformation during construction and greatly reduces the impact on the environment. The reduction of ground pressure also further guarantees the pile diameter. MJS construction method can be carried out in horizontal, inclined, vertical directions and at any angle. In particular, its unique grouting method makes horizontal construction safe and feasible in water-rich soil layers and when hole sealing is required. In horizontal construction, hole sealing becomes the key.

[0003] During the construction process, in order to ensure the safety of gas pipelines, rock-embedded piles and other pipelines, and to reduce the settlement and displacement of the surrounding soil during the shield advancement process, especially the differential settlement, a semicircular MJS horizontal reinforcement is made around the lower semicircle of the tunnel for reinforcement. The groundwater within the tunnel is abundant and has good water-rich properties, so the sealing of the MJS horizontal reinforcement hole is a key and difficult point of this project. Therefore, we propose a horizontal MJS method pile horizontal drilling anti-gushing device. Utility Model Content

[0004] The main purpose of the utility model is to provide a horizontal MJS method pile horizontal drilling anti-gushing device, which can effectively solve the problems in the background technology.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0006] A horizontal MJS construction method pile horizontal drilling anti-gushing device comprises a main pipe, a gate valve is installed at one end of the main pipe, a seat pipe is installed at the other end of the gate valve, a retaining ring is installed at the other end of the main pipe, a retaining cover is arranged between the main pipe and the retaining ring, a No. 4 water stop ring is arranged between the retaining cover and the main pipe, a No. 2 water stop ring is arranged between the main pipe and the gate valve, and a No. 3 water stop ring is arranged between the gate valve and the seat pipe; a No. 1 pressure relief pipe and a No. 2 pressure relief pipe are respectively installed on the seat pipe and the main pipe, and a No. 1 pressure relief valve and a No. 2 pressure relief valve are respectively installed on the No. 1 pressure relief pipe and the No. 2 pressure relief pipe.

[0007] Preferably, the main pipe is formed by connecting three sections of steel orifice pipes in sequence, the three sections of steel orifice pipes are coaxial, and a No. 1 water stop ring is arranged between two adjacent steel orifice pipes.

[0008] Preferably, the retaining cover includes a mounting ring, which is arranged between the retaining ring and the No. 4 water-stop ring. A cover shell is fixed on the inner side surface of the mounting ring, and a through hole is arranged at the center of the cover shell.

[0009] Preferably, the central axis of the through hole is in the same straight line as the central axis of the main tube and the central axis of the seat tube.

[0010] Preferably, the retaining ring has a central hole, and the cover shell is an arc-shaped shell and extends to the central hole of the retaining ring.

[0011] Compared with the prior art, the utility model has the following beneficial effects:

[0012] The utility model can effectively fill the gap between the new and old ground-connected walls, can effectively avoid the dangerous situation of water and sand gushing during the horizontal MJS method pile drilling process, and has the characteristics of reliable structure, easy installation, and repeated use. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of a horizontal MJS construction method pile horizontal drilling anti-gushing device of the utility model;

[0014] Figure 2 It is a cross-sectional view of a horizontal MJS construction method pile horizontal drilling anti-gushing device of the utility model;

[0015] Figure 3 It is a cross-sectional view of a horizontal MJS construction method pile horizontal drilling anti-gushing device of the utility model from another perspective;

[0016] Figure 4 The utility model is a schematic structural diagram of a shield of a horizontal MJS method pile horizontal drilling anti-gushing device.

[0017] In the figure: 1. main pipe; 2. gate valve; 3. seat pipe; 4. No. 1 pressure relief pipe; 41. No. 1 pressure relief valve; 5. No. 2 pressure relief pipe; 51. No. 2 pressure relief valve; 6. retaining ring; 7. retaining cover; 8. No. 1 water stop ring; 9. No. 2 water stop ring; 10. No. 3 water stop ring; 11. No. 4 water stop ring; 71. mounting ring; 72. cover; 73. perforation. DETAILED DESCRIPTION

[0018] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0019] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] like Figure 1-4 As shown, a horizontal MJS construction method pile horizontal drilling anti-gushing device includes a main pipe 1, which is formed by three sections of steel orifice pipes connected in sequence by bolts, and the three sections of steel orifice pipes are coaxial, and a No. 1 water stop ring 8 is arranged between two adjacent steel orifice pipes, and the No. 1 water stop ring 8 seals the connection between the two adjacent steel orifice pipes to prevent water leakage;

[0022] A gate valve 2 is installed at one end of the main pipe 1, and a seat pipe 3 is installed at the other end of the gate valve 2. The main pipe 1, the gate valve 2 and the seat pipe 3 are fixed together by bolts. A No. 2 water stop ring 9 is arranged between the main pipe 1 and the gate valve 2, and a No. 3 water stop ring 10 is arranged between the gate valve 2 and the seat pipe 3. The No. 2 water stop ring 9 and the No. 3 water stop ring 10 are used to seal the connection between the main pipe 1 and the gate valve 2, and the connection between the gate valve 2 and the seat pipe 3, respectively.

[0023] A retaining ring 6 is installed at the other end of the main pipe 1, a retaining cover 7 is arranged between the main pipe 1 and the retaining ring 6, and a fourth water stop ring 11 is arranged between the retaining cover 7 and the main pipe 1 to achieve water stop sealing;

[0024] A No. 1 pressure relief pipe 4 and a No. 2 pressure relief pipe 5 are respectively installed on the seat pipe 3 and the main pipe 1 , and a No. 1 pressure relief valve 41 and a No. 2 pressure relief valve 51 are respectively installed on the No. 1 pressure relief pipe 4 and the No. 2 pressure relief pipe 5 for pressure relief.

[0025] As a further explanation of the above technical solution, the retaining ring 6 has a center hole; the retaining cover 7 includes a mounting ring 71, which is arranged between the retaining ring 6 and the No. 4 water stop ring 11, and a cover shell 72 is fixed on the inner side surface of the mounting ring 71, and the cover shell 72 is an arc-shaped shell and extends to the center hole of the retaining ring 6; a through hole 73 is arranged at the center of the cover shell 72, and the central axis of the through hole 73 is in the same straight line as the central axis of the main pipe 1 and the central axis of the seat pipe 3.

[0026] It should be noted that before using the utility model as a horizontal MJS method pile horizontal drilling anti-gushing device, first determine the position of the MJS pile according to the pile center design requirements, conduct measurement and layout, and report relevant information. After the pile position is laid out, the pile driver is leveled and centered after the drilling rig is in place, check the drill rod status on the display, use the electric adjustment button to adjust the verticality of the drilling rig, and use a level ruler to check the verticality of the drill rod to ensure that the casing is consistent with the pile position, and the deviation is no more than 50mm; check the operation of the equipment to ensure that the main engine, high-pressure pump, air compressor, mud mixing system, MJS management device, etc. are in normal working state, and then put the main engine in place, and start zeroing after the frame is placed stably. After the MJS method equipment is in place, start drilling into the 1.5m thick underground continuous wall.

[0027] After drilling through the 1.5m thick underground continuous wall, the horizontal MJS method pile horizontal drilling anti-gushing device is used, that is, the seat pipe 3 is installed at the opening formed by the drilling, and the gate valve 2 is in the open state, and the No. 1 pressure relief valve 41 and the No. 2 pressure relief valve 51 are in the closed state, and then the drill rod is passed through (from one side of the seat pipe 3 and out from the perforation 73) the horizontal MJS method pile horizontal drilling anti-gushing device and lowered to the designed depth.

[0028] The above shows and describes the basic principle and main features of the utility model and the 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 horizontal MJS method pile horizontal drilling anti-gushing device, comprising a main pipe (1), characterized in that: A gate valve (2) is installed at one end of the main pipe (1), a seat pipe (3) is installed at the other end of the gate valve (2), a retaining ring (6) is installed at the other end of the main pipe (1), a retaining cover (7) is provided between the main pipe (1) and the retaining ring (6), a No. 4 water stop ring (11) is provided between the retaining cover (7) and the main pipe (1), a No. 2 water stop ring (9) is provided between the main pipe (1) and the gate valve (2), and a No. 3 water stop ring (10) is provided between the gate valve (2) and the seat pipe (3); a No. 1 pressure relief pipe (4) and a No. 2 pressure relief pipe (5) are installed on the seat pipe (3) and the main pipe (1), respectively, and a No. 1 pressure relief valve (41) and a No. 2 pressure relief valve (51) are installed on the No. 1 pressure relief pipe (4) and the No. 2 pressure relief pipe (5), respectively.

2. A horizontal MJS construction method pile horizontal drilling anti-gushing device according to claim 1, characterized in that: The main pipe (1) is formed by connecting three sections of steel orifice pipes in sequence. The three sections of steel orifice pipes are coaxial, and a first water stop ring (8) is provided between two adjacent steel orifice pipes.

3. The horizontal MJS construction method pile horizontal drilling anti-gushing device according to claim 1 is characterized by: The retaining cover (7) comprises a mounting ring (71), the mounting ring (71) being arranged between the retaining ring (6) and the fourth water stop ring (11), a cover shell (72) being fixed on the inner side surface of the mounting ring (71), and a through hole (73) being arranged at the center of the cover shell (72).

4. The horizontal MJS construction method pile horizontal drilling anti-gushing device according to claim 3 is characterized by: The central axis of the through hole (73) is in the same straight line as the central axis of the main tube (1) and the central axis of the seat tube (3).

5. The horizontal MJS construction method pile horizontal drilling anti-gushing device according to claim 3 is characterized by: The retaining ring (6) has a central hole, and the cover shell (72) is an arc-shaped shell and extends to the central hole of the retaining ring (6).

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