Submersible leaking stoppage method for bottom sealing of vertical shaft

Abstract

The submersible type leaking stoppage method comprises the following steps that S1, a diving bell is lifted to the position over a shaft body of the vertical shaft, and the diving bell sinks to the top face of the sealing bottom; s2, a slag suction system is started, and sludge in the pressure cabin is discharged; s3, the slag suction system is closed, the pressurization system is started, formation water in the pressure cabin is discharged, and pressure maintaining is conducted; s4, the grease sealing system is started, and the gap between the pressure chamber and the sealing bottom is filled with grease of the grease sealing system; s5, a constructor enters the pre-pressing cabin and the pressure cabin in sequence, and the water seepage position of the sealing bottom is monitored; s6, holes are formed in the two sides of the crack subjected to bottom sealing, grouting plugging is conducted through a grouting system, and the plugging quality of the crack subjected to bottom sealing is detected; and S7, the constructor leaves the diving bell, closes the pressurization system, lifts the diving bell and moves the diving bell out of the shaft of the vertical shaft. The device has the advantages that dross on the top surface of the bottom seal of the vertical shaft can be automatically cleaned underwater; and vertical shaft bottom sealing grouting plugging can be carried out underwater.

Description

Technical Field

[0001] The invention belongs to the technical field of vertical shaft construction, and in particular relates to a submersible plugging method for vertical shaft bottom sealing. Background Art

[0002] Major cities have built shaft garages to alleviate the problem of parking difficulties, underground water storage pools to regulate flood disasters and recycle water resources, and shafts are used as underground energy storage and underground energy storage space. The shaft construction methods are divided into manual excavation construction, semi-mechanical excavation construction and mechanical excavation construction. For strata with poor ground stability, submersible shaft boring machines are usually used for construction. During the construction process, the submersible shaft boring machine needs to be submerged underwater for construction, especially in water-rich strata, especially in coastal cities. After the shaft sinks to the designed depth, there is a large amount of formation water on the inner wall of the shaft. Shaft excavation is prone to a large amount of thick mud on the inner side of the shaft wall at the bottom of the shaft, and the casting of the deep shaft bottom is prone to cause concrete segregation, resulting in leakage of the bottom.

[0003] The use of drainage grouting to plug leaks in water-rich strata shafts will cause groundwater loss and deformation of the strata around the shafts, affecting the safety of the shafts and surrounding buildings. Water-rich deep shafts cannot drain the shaft water to form a deep shaft enclosed space, providing a working space for construction personnel to ensure underwater operation safety, and it is difficult to plug leaks by grouting the bottom of the underwater shaft; at the same time, the underwater silt in the shaft and the floating slurry on the upper bottom of the underwater cast shaft have a certain strength, and the shaft and the shaft water depth are large and difficult to clean, affecting the subsequent grouting plugging operation and plugging effect. Summary of the invention

[0004] The object of the present invention is to provide a submersible plugging method for shaft bottom sealing in accordance with the above-mentioned deficiencies of the prior art, wherein a diving bell is used to plug the bottom of the shaft. The diving bell consists of a pressure chamber, a pre-pressure chamber and a channel. The pressure chamber is a cylindrical structure with a cover on the top. A pressurization system, a slag suction system, a grouting system and a grease sealing system are provided on the pressure chamber. The slag suction system can automatically clean the floating slag on the top surface of the shaft bottom sealing underwater. The pressurization system and the grease sealing system can form a closed space underwater to provide a working space for construction personnel and ensure the safety of underwater operations. The grouting system can perform grouting and plugging of the shaft bottom sealing underwater.

[0005] The purpose of the present invention is achieved by the following technical solutions: A submersible plugging method for shaft bottom sealing, the method comprising the following steps: S1: hoisting the diving bell to the top of the shaft of the vertical shaft, and sinking the diving bell to the top surface of the bottom cover; The diving bell comprises a pressure chamber and a pre-pressure chamber, wherein the pre-pressure chamber is installed above the pressure chamber and communicated with the pressure chamber through a channel, the pressure chamber is a cylindrical structure with a cover on the top, and a pressurizing system, a slag suction system, a grouting system and a grease sealing system are provided on the pressure chamber; the pressurizing system and the slag suction system are respectively communicated with the inside of the pressure chamber, the outlet of the grouting system extends to the inside of the pressure chamber, and the outlet of the grease sealing system is arranged along the circumference of the bottom of the pressure chamber; S2: starting the slag suction system to discharge the slag in the pressure chamber; S3: closing the slag suction system, opening the pressurizing system, discharging the formation water in the pressure chamber and maintaining the pressure; S4: opening the grease sealing system to allow the grease in the grease sealing system to fill the gap between the pressure chamber and the bottom cover; S5: Construction personnel enter the pre-compression chamber and the pressure chamber in turn, and monitor the water seepage position of the bottom cover; S6: drilling holes on both sides of the crack of the bottom cover, performing grouting and plugging using the grouting system, and detecting the plugging quality of the crack of the bottom cover; S7: The construction personnel leave the diving bell, shut down the pressurization system, lift the diving bell and move it out of the shaft of the vertical shaft.

[0006] The boosting system comprises a boosting pipe and a boosting pump. One end of the boosting pipe is connected to the pressure chamber, and the other end is provided with a boosting pump.

[0007] The slag suction system comprises a slag suction hose, a slag suction pipe, a slag suction pump and a one-way valve. The slag suction hose is arranged in the pressure chamber, one end of the slag suction pipe is connected to the slag suction hose, and the other end is provided with the one-way valve and the slag suction pump in sequence.

[0008] The grouting system comprises a plurality of grouting pipes, the bottoms of which extend into the pressure chamber.

[0009] The grease sealing system comprises a plurality of grease delivery pipes, and the outlets of the grease delivery pipes are located at the bottom of the pressure chamber.

[0010] The pressure cabin is composed of a pressure cabin top plate and a pressure cabin coaming, and a circle of sealing rubber is arranged at the bottom of the pressure cabin coaming.

[0011] The pre-compression cabin is formed by a pre-compression cabin top plate, a pre-compression cabin bottom plate and a pre-compression cabin coaming. An inlet and outlet coaming is provided at the inlet and outlet holes of the pre-compression cabin top plate. A pre-compression cabin door is installed on the top of the inlet and outlet coaming. A pressure cabin door is provided at the pressure cabin passage opening of the pre-compression cabin bottom plate.

[0012] The channel consists of a channel tube and a ladder installed in the channel tube, and the bottom of the ladder extends into the pressure cabin.

[0013] The diving bell is hoisted by a cable, and the cable is connected to the pressure chamber.

[0014] The advantages of the present invention are: (1) It can form a confined space underwater to provide working space for construction workers and ensure the safety of underwater operations; (2) The scum on the top surface of the bottom of the shaft can be automatically cleaned underwater; (3) The bottom of the shaft can be sealed and grouting can be carried out underwater to stop leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic flow chart of the steps of the submersible plugging method for bottom sealing of a vertical shaft according to the present invention; Figure 2 It is a schematic diagram of the structure of the diving bell of the present invention; Figure 3 for Figure 2 Middle AA section; Figure 4 for Figure 2 Middle BB section; Figure 5 for Figure 2 Middle CC section; Figure 6 for Figure 2 Middle DD section; Figure 7 This is a schematic diagram of the diving bell of the present invention working in a vertical shaft; like Figures 1 to 7 As shown, the marks in the figure represent respectively: 1. Diving bell, 2. Vertical shaft, 3. Formation, 4. Formation water, 5. Air intake direction, 6. Slag discharge direction, 7. Mud; 11. Pressure chamber, 12. Pressurization system, 13. Slag suction system, 14. Pre-pressure chamber, 15. Passage, 16. Grouting pipe, 17. Cable; 111. Pressure chamber top plate, 112. Pressure chamber coaming, 113. Sealing rubber, 114. Passage hole, 115. Pressurization pipe hole, 116. Slag suction pipe hole, 117. Grease pipe hole, 118. Grease delivery pipe, 119. Grouting pipe hole; 121. Booster pipe, 122. Booster pump; 131. Slag suction hose, 132. Slag suction pipe, 133. Slag suction pump, 134. One-way valve; 141. Pre-pressure tank top plate, 142. Pre-pressure tank bottom plate, 143. Pre-pressure tank coaming, 144. Inlet and outlet holes, 145. Inlet and outlet coamings, 146. Pre-pressure tank door, 147. Pressure tank passage opening, 148. Pressure tank door; 151. Passageway, 152. Ladder; 21. Well wall, 22. Bottom cover, 23. Crack. DETAILED DESCRIPTION

[0016] The features of the present invention and other related features are further described in detail below through embodiments in conjunction with the accompanying drawings to facilitate understanding by those skilled in the art: Example: Figures 1 to 7 As shown, this embodiment specifically relates to a submersible plugging method for shaft bottom sealing, which mainly includes the following steps: S1: The diving bell 1 is hoisted to the top of the shaft of the vertical shaft 2, and the diving bell 1 is sunk to the top surface of the bottom cover 22.

[0017] Among them, Figures 2 to 7As shown, the diving bell 1 is arranged in the vertical shaft 2 and is used for plugging the bottom cover 22 of the vertical shaft 2, wherein the vertical shaft 2 is arranged in the formation 3, and there are formation water 4 and mud residue 7 in the vertical shaft 2. The diving bell 1 mainly comprises a pressure chamber 11, a pre-pressure chamber 14 and a channel 15. The pre-pressure chamber 14 is installed above the pressure chamber 11 and is connected with the pressure chamber 11 through the channel 15. The pressure chamber 11 is a cylindrical structure with a cover on the top. The outer diameter of the pressure chamber 11 is smaller than the inner diameter of the vertical shaft 2, that is, the pressure chamber 11 does not contact the shaft wall 21 of the vertical shaft 2. The pressure chamber 11 is composed of a pressure chamber top plate 111 and a pressure chamber enclosure 112. A circle of sealing rubber 113 is provided at the bottom of the pressure chamber enclosure 112. The sealing rubber 113 is not only used for sealing the pressure chamber 11, but also can prevent the collision between the pressure chamber enclosure 112 and the bottom cover 22, thereby playing a buffering role. The diving bell 1 is hoisted by a cable 17, and the cable 17 is connected to the pressure chamber 11 (pressure chamber top plate 111). The pre-compression chamber 14 is enclosed by a pre-compression chamber top plate 141, a pre-compression chamber bottom plate 142 and a pre-compression chamber coaming 143. The two ends of the pre-compression chamber coaming 143 are respectively connected to the pre-compression chamber top plate 141 and the pre-compression chamber bottom plate 142. An inlet and outlet coaming 145 is provided at the inlet and outlet hole 144 of the pre-compression chamber top plate 141. A pre-compression chamber door 146 is installed on the top of the inlet and outlet coaming 145. A pressure chamber door 148 is provided at the pressure chamber passage opening 147 of the pre-compression chamber bottom plate 142. The pressure chamber passage opening 147 is connected to the passage 15 (passage tube 151). The passage 15 is composed of a passage tube 151 and a ladder 152 installed in the passage tube 151. The bottom of the ladder 152 extends into the pressure chamber 11. The staff enters the pressure chamber 11 through the pre-compression chamber door 146, the inlet and outlet enclosure 145, the inlet and outlet hole 144, the pre-compression chamber enclosure 143, the pressure chamber door 148 and the passage tube 151 in sequence, and the ladder 152 facilitates the staff to climb.

[0018] The pressure chamber 11 is provided with a boosting system 12, a slag suction system 13, a grouting system and a grease sealing system. The boosting system 12 and the slag suction system 13 are respectively connected to the inside of the pressure chamber 1, the outlet of the grouting system extends to the inside of the pressure chamber 1, and the outlet of the grease sealing system is arranged along the circumference of the bottom of the pressure chamber 1 (pressure chamber enclosure 112). The boosting system 12 is used to discharge the formation water 4 in the pressure chamber 11 and play a role in maintaining pressure. The boosting system 12 includes a boosting pipe 121 and a boosting pump 122. One end of the boosting pipe 121 is connected to the pressure chamber 11, and the other end is provided with a boosting pump 122. The boosting pipe 121 is installed in the boosting pipe hole 115 of the pressure chamber top plate 111. Gas passes through the boosting pipe 121, and then the gas is pressurized by the boosting pump 122 and pumped into the pressure chamber 11 to discharge the formation water 4 in the pressure chamber 11. The air intake direction 5 is as shown in FIG. Figure 1 and Figure 6 shown.

[0019] The slag suction system 13 is used to discharge the mud 7 in the pressure chamber 11. The slag suction system 13 includes a slag suction hose 131, a slag suction pipe 132, a slag suction pump 133 and a one-way valve 134. The slag suction hose 131 is arranged in the pressure chamber 11. One end of the slag suction pipe 132 is connected to the slag suction hose 131, and the other end is provided with a one-way valve 134 and a slag suction pump 133 in sequence. The slag suction pipe 132 is installed in the slag suction pipe hole 116 of the pressure chamber top plate 111. The slag suction pump 133 is used to pump out the mud 7 in the pressure chamber 11. The one-way valve 134 is used to adjust the pumping amount of the mud 7. The slag discharge direction 6 is as shown in FIG. Figure 1 and Figure 6 shown.

[0020] The grouting system is used for grouting and sealing the cracks 23 of the bottom cover 22. The grouting system includes a plurality of grouting pipes 16. The bottom of the grouting pipes 16 extends into the pressure chamber 11. The grouting pipes 16 are installed in the grouting pipe holes 119 of the pressure chamber top plate 111. The slurry in the grouting pipes 16 is used to seal the cracks 23 of the bottom cover 22.

[0021] The grease sealing system is used to ensure the sealing of the pressure chamber 11. The grease sealing system includes a plurality of grease delivery pipes 118. The outlets of the grease delivery pipes 118 are located at the bottom of the pressure chamber 11. The grease delivery pipes 118 are installed in the grease pipe holes 117 of the pressure chamber top plate 111, the pressure chamber enclosure 112 and the sealing rubber 113. The grease of the grease sealing system (grease delivery pipes 118) fills the gap between the pressure chamber 11 (sealing rubber 113) and the bottom cover 22, thereby ensuring the sealing of the pressure chamber 11.

[0022] S2: Open the slag suction pump 133 and the one-way valve 134 of the slag suction system 13 to discharge the mud 7 in the pressure chamber 11.

[0023] S3: The slag suction pump 133 and the one-way valve 134 of the slag suction system 13 are closed, and the booster pump 122 of the booster system 12 is opened to discharge the formation water 4 in the pressure chamber 11 and maintain the pressure.

[0024] S4: Open the grease sealing system to allow the grease in the grease sealing system to fill the gap between the pressure chamber 11 and the bottom cover 22 .

[0025] S5: The construction personnel sequentially enter the pre-compression chamber 14 to pressurize the chamber, and enter the pressure chamber 14 to monitor the water seepage position of the bottom cover 22 .

[0026] S6: drilling holes on both sides of the crack 23 of the bottom cover 22, performing grouting and plugging using a grouting system, and detecting the plugging quality of the crack 23 of the bottom cover 22.

[0027] S7: The construction personnel leave the diving bell 1, turn off the booster pump 122 of the booster system 12, lift the diving bell 1 and move it out of the shaft of the vertical shaft 2.

[0028] The beneficial effects of this embodiment are: (1) It can form a confined space underwater to provide working space for construction workers and ensure the safety of underwater operations; (2) Automatically clean the scum on the top surface of the shaft bottom seal underwater; (3) The bottom of the shaft can be sealed and grouting can be carried out underwater to stop leakage.

[0029] Although the above embodiments have described in detail the concepts and embodiments of the present invention with reference to the accompanying drawings, ordinary technicians in this field can recognize that various improvements and changes can still be made to the present invention without departing from the scope of the claims, so they are not described one by one here.

Claims

1. A submersible plugging method for shaft bottom sealing, characterized in that The method comprises the following steps: S1: hoisting the diving bell to the top of the shaft of the vertical shaft, and sinking the diving bell to the top surface of the bottom cover; The diving bell comprises a pressure chamber and a pre-pressure chamber, wherein the pre-pressure chamber is installed above the pressure chamber and communicated with the pressure chamber through a channel, the pressure chamber is a cylindrical structure with a cover on the top, and a pressurizing system, a slag suction system, a grouting system and a grease sealing system are provided on the pressure chamber; the pressurizing system and the slag suction system are respectively communicated with the inside of the pressure chamber, the outlet of the grouting system extends to the inside of the pressure chamber, and the outlet of the grease sealing system is arranged along the circumference of the bottom of the pressure chamber; S2: starting the slag suction system to discharge the slag in the pressure chamber; S3: closing the slag suction system, opening the pressurizing system, discharging the formation water in the pressure chamber and maintaining the pressure; S4: opening the grease sealing system to allow the grease in the grease sealing system to fill the gap between the pressure chamber and the bottom cover; S5: Construction personnel enter the pre-compression chamber and the pressure chamber in turn, and monitor the water seepage position of the bottom cover; S6: drilling holes on both sides of the crack of the bottom cover, performing grouting and plugging using the grouting system, and detecting the plugging quality of the crack of the bottom cover; S7: The construction personnel leave the diving bell, shut down the pressurization system, lift the diving bell and move it out of the shaft of the vertical shaft.

2. A submersible plugging method for shaft bottom sealing according to claim 1, characterized in that The boosting system comprises a boosting pipe and a boosting pump. One end of the boosting pipe is connected to the pressure chamber, and the other end is provided with a boosting pump.

3. A submersible plugging method for shaft bottom sealing according to claim 1, characterized in that The slag suction system comprises a slag suction hose, a slag suction pipe, a slag suction pump and a one-way valve. The slag suction hose is arranged in the pressure chamber, one end of the slag suction pipe is connected to the slag suction hose, and the other end is provided with the one-way valve and the slag suction pump in sequence.

4. A submersible plugging method for shaft bottom sealing according to claim 1, characterized in that The grouting system comprises a plurality of grouting pipes, the bottoms of which extend into the pressure chamber.

5. A submersible plugging method for shaft bottom sealing according to claim 1, characterized in that The grease sealing system comprises a plurality of grease delivery pipes, and the outlets of the grease delivery pipes are located at the bottom of the pressure chamber.

6. A submersible plugging method for shaft bottom sealing according to claim 1, characterized in that The pressure cabin is composed of a pressure cabin top plate and a pressure cabin coaming, and a circle of sealing rubber is arranged at the bottom of the pressure cabin coaming.

7. A submersible plugging method for shaft bottom sealing according to claim 1, characterized in that The pre-compression cabin is formed by a pre-compression cabin top plate, a pre-compression cabin bottom plate and a pre-compression cabin coaming. An inlet and outlet coaming is provided at the inlet and outlet holes of the pre-compression cabin top plate. A pre-compression cabin door is installed on the top of the inlet and outlet coaming. A pressure cabin door is provided at the pressure cabin passage opening of the pre-compression cabin bottom plate.

8. A submersible plugging method for shaft bottom sealing according to claim 1, characterized in that The channel consists of a channel tube and a ladder installed in the channel tube, and the bottom of the ladder extends into the pressure cabin.

9. A submersible plugging method for shaft bottom sealing according to claim 1, characterized in that The diving bell is hoisted by a cable, and the cable is connected to the pressure chamber.

Images