Sealing device for MJS horizontal pile orifice

Abstract

The utility model provides a sealing device for an MJS horizontal pile hole opening. The sealing device comprises a connecting plate, a rubber gasket and a horizontal internally-inserted sleeve. A hole is formed in the center of the connecting plate, one end of the horizontal internally-inserted sleeve is welded and fixed to the inner side of the connecting plate, and the size of the horizontal internally-inserted sleeve is consistent with the size of the hole in the center of the connecting plate; the at least three rubber gaskets are arranged on the outer side of the horizontal inner inserting sleeve in a stacked and sleeving manner and are tightly attached to the inner side of the connecting plate; a plurality of wall connecting holes are formed in the inner side of the connecting plate, and a plurality of grout stop valve connecting holes are formed in the outer side of the connecting plate. The sealing device for the MJS horizontal pile orifice has the advantages of being good in sealing performance and capable of preventing slurry from flowing back.

Description

Technical Field

[0001] The utility model relates to the technical field of underground engineering construction, in particular to a sealing device for an MJS horizontal pile hole. Background Art

[0002] In the MJS horizontal reinforcement rotary jet grouting construction, the existing technology is to use a slurry stop valve as a slurry backflow prevention device, but there is an inevitable gap between the slurry stop valve and the original base surface, and the waste caused by slurry backflow far exceeds the design value.

[0003] Moreover, this method results in low grouting quality and long time consumption, with the average grouting time increasing by 5 hours.

[0004] For example, in the utility model patent for the horizontal MJS method pile hole anti-spraying sealing device with application number CN202020215299.3, a wall flange is arranged on the outside of the wall, and a connecting assembly, a valve assembly, a pipe joint assembly, a sealing assembly, etc. are arranged in sequence to perform horizontal pile hole anti-spraying sealing. However, its working environment is relatively simple and cannot be applied to pile hole sealing in working conditions such as culverts. Utility Model Content

[0005] The utility model aims to address the deficiencies of the prior art and thus provide a sealing device for the opening of an MJS horizontal pile, which has good sealing performance and can prevent slurry from flowing back.

[0006] In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is: a sealing device for the opening of the MJS horizontal pile, comprising a connecting plate, a rubber gasket and a horizontal inner insert sleeve;

[0007] A hole is opened at the center of the connecting plate, one end of the horizontal inner sleeve is welded and fixed to the inner side of the connecting plate, and the size of the horizontal inner sleeve is consistent with the size of the hole at the center of the connecting plate;

[0008] The rubber gaskets are provided in at least three pieces, and are stacked and sleeved on the outside of the horizontal inner insert sleeve, and are arranged close to the inner side of the connecting plate;

[0009] A plurality of wall connection holes are provided on the inner side of the connection plate, and a plurality of slurry stop valve connection holes are provided on the outer side of the connection plate.

[0010] Preferably, the connecting plate is made of steel plate, and the thickness of the connecting plate is 2 cm.

[0011] Preferably, the specification of the connecting plate is 60cm*60cm.

[0012] Preferably, the number of the rubber gaskets is 3-4 pieces, and the specification of the rubber gasket is 40cm*40cm.

[0013] Preferably, the wall connection holes opened on the inner side of the connection plate have a specification of A20mm bolt hole through holes, and the number is at least 8.

[0014] Preferably, the slurry stop valve connection holes opened on the outer side of the connecting plate are A20mm bolt hole through holes, and the number is at least 8.

[0015] Preferably, a movable gasket with a diameter ≥ 200 mm is provided on the outer side of the connecting plate.

[0016] Preferably, the wall connection hole is located outside the slurry stop valve connection hole.

[0017] Preferably, the inner diameter of the central opening of the connecting plate and the inner diameter of the horizontal inserted sleeve are ≥ 200 mm.

[0018] Preferably, the length of the horizontal inner sleeve is ≥80 cm, and the material of the horizontal inner sleeve is a steel pipe.

[0019] The utility model has substantial characteristics and progress compared with the prior art. Specifically, the utility model inserts the horizontal inner sleeve of the device horizontally into the horizontal orifice to be sealed, and then uses bolts to connect the connecting plate and the wall from the outside. The rubber gasket in the middle realizes sealing, and the slurry stop valve is installed on the outside, which can effectively prevent the horizontal multi-angle slurry backflow. With the orifice sealing device, it can ensure that the slurry forms a closed space in the hole and ensure the solidification quality of the high-pressure grouting pile. Finally, the slurry backflow and overflow phenomenon can be effectively suppressed, while ensuring the grouting quality, reducing the construction risk, and saving construction time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is an end view of a sealing device for an MJS horizontal pile hole in the utility model.

[0021] Figure 2 The utility model is a schematic diagram of the use status of a sealing device for an MJS horizontal pile hole.

[0022] In the figure: 1. connecting plate; 2. rubber gasket; 3. horizontal inner sleeve; 4. hole; 5. wall connecting hole; 6. slurry stop valve connecting hole; 7. wall. DETAILED DESCRIPTION

[0023] The technical solution of the utility model is further described in detail below through specific implementation methods.

[0024] like Figure 1 and Figure 2 As shown, a sealing device for the opening of a MJS horizontal pile comprises a connecting plate 1, a rubber gasket 2 and a horizontal inner sleeve 3.

[0025] A hole 4 is opened at the center of the connecting plate 1, and one end of the horizontal inner sleeve 3 is welded and fixed to the inner side of the connecting plate 1. The size of the horizontal inner sleeve 3 is consistent with the size of the hole 4 at the center of the connecting plate, and is used to be inserted into the hole opened in the wall 7.

[0026] The rubber gasket 2 is provided with at least three pieces, which are stacked and sleeved on the outside of the horizontal inner sleeve 3 and are closely arranged on the inner side of the connecting plate 1;

[0027] A plurality of wall connection holes 5 are provided on the inner side of the connection plate 1 , and a plurality of slurry stop valve connection holes 6 are provided on the outer side of the connection plate.

[0028] In this embodiment, the material of the connecting plate 1 is a steel plate, the thickness of the connecting plate is 2 cm, and the specification of the connecting plate is 60 cm*60 cm.

[0029] The number of the rubber gaskets is 3-4 pieces, and the specification of the rubber gasket is 40cm*40cm.

[0030] The specifications of the wall connection holes opened on the inner side of the connecting plate are A20mm bolt hole through holes, and the number is at least 8. The slurry stop valve connection holes opened on the outer side of the connecting plate are A20mm bolt hole through holes, and the number is at least 8. The wall connection holes are located on the outside of the slurry stop valve connection holes.

[0031] A movable gasket with a diameter of ≥200 mm is arranged on the outer side of the connecting plate, which is used to be placed between the two when connecting the slurry stop valve.

[0032] The inner diameter of the central opening of the connecting plate and the inner diameter of the horizontal inner sleeve are ≥200 mm, the length of the horizontal inner sleeve is ≥80 cm, and the material of the horizontal inner sleeve is a steel pipe.

[0033] The specific construction process is explained by taking a single culvert requiring four sets of sealing devices as an example:

[0034] 8.1 Cutting

[0035] Select 4 pieces of 60cm*60cm*2mm steel plates, refer to Figure 1 Open 16 bolt holes; open 16 40mm*40mm rubber gaskets with an inner circle of 20cm in the middle; 4 steel pipes with a diameter of 20cm and a length of 80cm; and a number of matching bolt holes and bolts.

[0036] 8.2 Assembly

[0037] Refer to the attached figure, use 60*60 steel plate, the 8 holes on the outside are fixed to the side wall of the main body with M20 bolts, and the 8 bolt holes on the inside are connected to the slurry stop valve. 3~4 rubber gaskets of equal size are stacked in the middle to increase the water-stopping property, and then installed at the hole sealing device level to the hole cut by the water drill, and fixed to the side wall through the bolt holes on the outside, and the drill rod is deep for subsequent jet drilling operations.

[0038] When the cement reaches the initial setting design value, it can be disassembled and moved to the next hole.

[0039] This device was used for relevant verification tests during the construction of MJS horizontal piles for the ends of Well 5A and Well 4 in the first section of the power transmission line relocation project along Xinlong Road in Jinshui District. By installing this device, the waste of cement slurry can be greatly reduced to ensure the construction quality. At the same time, the grouting time was reduced from the original 5 hours to 3.5 hours, saving 1.5 hours per pile, and it is expected to save 5 days of construction period.

[0040] Finally, it should be noted that: The above describes in detail the preferred implementation of this patent, but this patent is not limited to the above implementation. Various changes can be made within the knowledge scope of ordinary technicians in this field without departing from the purpose of this patent.

Claims

1. A sealing device for the opening of a MJS horizontal pile, characterized in that: It includes a connecting plate, a rubber gasket and a horizontal inner sleeve; A hole is opened at the center of the connecting plate, one end of the horizontal inner sleeve is welded and fixed to the inner side of the connecting plate, and the size of the horizontal inner sleeve is consistent with the size of the hole at the center of the connecting plate; The rubber gaskets are provided in at least three pieces, and are stacked and sleeved on the outside of the horizontal inner insert sleeve, and are arranged close to the inner side of the connecting plate; A plurality of wall connection holes are provided on the inner side of the connection plate, and a plurality of slurry stop valve connection holes are provided on the outer side of the connection plate.

2. The sealing device for the opening of MJS horizontal pile according to claim 1, characterized in that: The connecting plate is made of steel plate, and the thickness of the connecting plate is 2 cm.

3. The sealing device for the opening of MJS horizontal pile according to claim 2, characterized in that: The specification of the connecting plate is 60cm*60cm.

4. The sealing device for the opening of a MJS horizontal pile according to claim 3, characterized in that: The number of the rubber gaskets is 3-4 pieces, and the specification of the rubber gasket is 40cm*40cm.

5. The sealing device for the opening of a MJS horizontal pile according to claim 4, characterized in that: The wall connection holes opened on the inner side of the connection plate have a specification of A20mm bolt hole through holes, and the number is at least 8.

6. The sealing device for the opening of a MJS horizontal pile according to claim 5, characterized in that: The slurry stop valve connection holes opened on the outer side of the connection plate are A20mm bolt hole through holes, and the number is at least 8.

7. The sealing device for the opening of a MJS horizontal pile according to claim 6, characterized in that: A movable gasket with a diameter of ≥200 mm is arranged on the outer side of the connecting plate.

8. The sealing device for the opening of a MJS horizontal pile according to claim 7, characterized in that: The wall connection hole is located outside the slurry stop valve connection hole.

9. The sealing device for the opening of a MJS horizontal pile according to claim 8, characterized in that: The inner diameter of the central opening of the connecting plate and the inner diameter of the horizontal inner sleeve are ≥200mm.

10. The sealing device for the opening of a MJS horizontal pile according to claim 9, characterized in that: The length of the horizontal inner sleeve is ≥80 cm, and the material of the horizontal inner sleeve is a steel pipe.

Images