Cement paste and water glass mixed grouting plugging method

Abstract

The invention discloses a cement paste and water glass mixed grouting leaking stoppage method, and relates to the field of foundation pit construction, and the method comprises the following steps that drilling equipment is used for drilling in a mode of crushing a detection pipe, so that a detection hole is partially or completely exposed by the detection pipe originally, and the diameter of a drill rod of the drilling equipment is larger than the outer diameter of the detection pipe; grouting the inner side of the detection hole by using a double-liquid grouting machine; during grouting, a grouting pipe of a double-liquid grouting machine extends into the bottom of the detection hole, the double-liquid grouting machine mixes and injects cement paste and water glass into the detection hole through the grouting pipe, and the grouting pipe is gradually lifted upwards along with the grouting process; and after grouting, the slurry is solidified into a columnar leaking stoppage structure. In the application, the mixed slurry of the cement paste and the water glass can be quickly solidified, so that the period of leaking stoppage construction can be shortened.

Description

Technical Field

[0001] The present invention relates to the field of foundation pit construction technology, and in particular to a method for plugging leaks by grouting a mixture of cement slurry and water glass. Background Art

[0002] During the foundation pit construction, since the construction of the contractor does not meet the requirements of the specifications, it is necessary to inspect the pile foundation that has been constructed in the foundation pit. During the inspection, it is necessary to drill holes near the pile foundation and insert and install inspection tubes in the drilled inspection holes. The inspection tube is usually made of plastic, so that the pile foundation can be inspected by X-ray inspection equipment through the inspection tube to detect the distribution and density of the concrete in the pile foundation and whether the steel bar binding of the steel cage meets the requirements of the specifications.

[0003] However, during the inspection and construction process, since the actual construction depth of each pile foundation is unclear, it is necessary to drill to a greater depth. Based on the above reasons, sometimes the bottom of the inspection hole is too close to the underground pressurized water, which causes the pressurized water below the foundation pit to break through the soil, causing the pressurized water to flow into the foundation pit through the inspection pipe, aggravating the water seepage in the foundation pit, resulting in serious water accumulation in the base of the base seepage area, and continuous water seepage. If dewatering is carried out by excavating a dewatering well and then plugging the leak by pouring cement slurry, the construction period will be long. Summary of the invention

[0004] In order to reduce the construction period of underground pressurized water leakage during the construction of the detection hole of the steel cage for detecting the pile foundation, the present application provides a method of grouting and plugging leakage by mixing cement slurry and water glass.

[0005] The present application provides a method for plugging leaks by grouting a mixture of cement slurry and water glass, which adopts the following technical solution: A method for plugging leaks by grouting a mixture of cement slurry and water glass comprises the following steps: drilling a hole by a drilling device in a manner of crushing a detection tube so that the detection tube originally exposed is partially or completely exposed, and the diameter of the drill rod of the drilling device is larger than the outer diameter of the detection tube; grouting the inside of the detection hole by a double-liquid grouting machine; during grouting, the grouting pipe of the double-liquid grouting machine is extended into the bottom of the detection hole, and the double-liquid grouting machine injects a mixture of cement slurry and water glass into the detection hole through the grouting pipe, and as the grouting process proceeds, the grouting pipe is gradually lifted up; after grouting, the slurry solidifies into a columnar plugging structure.

[0006] By adopting the above technical solution, compared with the conventional cement slurry, the mixed slurry of cement and water glass can solidify quickly, so as to achieve the purpose of plugging the detection hole as soon as possible and shortening the period of leakage plugging construction. The detection pipe is crushed by drilling equipment. After the grouting work is completed, the slurry solidifies to form a columnar leakage plugging structure, and the columnar leakage plugging structure is tightly combined with the soil body, which can form a reliable plugging effect on the detection hole. After the detection pipe is crushed, the passage between the upper end of the detection hole and the bottom of the foundation pit is cut off, making it difficult for groundwater to seep upward along the detection hole into the foundation pit.

[0007] Optionally, after grouting the inner side of the detection hole, a plastic pipe cylinder is inserted into the soil body in the area corresponding to the columnar leakage plugging structure. The inner wall of the plastic pipe cylinder is provided with an inner plastic film layer. The diameter of the plastic pipe cylinder is larger than the diameter of the columnar leakage plugging structure, and a mixed slurry of cement and water glass is injected into the plastic pipe cylinder.

[0008] By adopting the above technical solution, a plastic pipe cylinder is inserted in the area corresponding to the columnar leakage plugging structure, and a mixed slurry of cement and water glass is injected into the plastic pipe cylinder. The slurry in the plastic pipe cylinder can form a downward pressure on the slurry of the columnar leakage plugging structure, which is beneficial to making the slurry of the columnar leakage plugging structure more dense during the solidification process and improving the leakage plugging effect of the columnar leakage plugging structure. After the columnar leakage plugging structure solidifies, the solidified slurry in the plastic pipe cylinder is cut off and separated from the columnar leakage plugging structure. The inner plastic film layer can separate the inner wall of the plastic pipe cylinder. When the slurry in the plastic pipe cylinder solidifies, it is integrated with the inner plastic film layer. Subsequently, the solidified slurry in the plastic pipe cylinder together with the inner plastic film layer can be taken out of the plastic pipe cylinder at the same time, so as to facilitate the recycling of the plastic pipe cylinder.

[0009] Optionally, a scraping member is pre-placed in the plastic pipe cylinder. The scraping member includes a vertical rod and a horizontal rod. The midpoint of the vertical rod is fixedly connected to the horizontal rod. The length of the horizontal rod is less than or equal to the inner diameter of the plastic pipe cylinder, and the length of the vertical rod is greater than the length of the plastic pipe cylinder; the horizontal rod can be used to rotate and sweep the interface position between the slurry in the plastic pipe cylinder and the slurry of the columnar leakage plugging structure.

[0010] By adopting the above technical solution, during the solidification process of the cement slurry in the plastic pipe cylinder, using the scraping member to sweep the interface position between the cement slurry in the plastic pipe cylinder and the cement slurry of the columnar leakage plugging structure can prevent the cement slurry in the plastic pipe cylinder from combining with the columnar leakage plugging structure into a whole.

[0011] Optionally, before grouting the detection hole, plugging filler is first stuffed into the remaining detection pipe, and a rubber damping member is filled above the plugging filler.

[0012] By adopting the above technical solution, the plugging filler is stuffed into the bottom of the detection tube, and the rubber damping member is used for blocking and limiting, so that the plugging filler and the rubber damping member jointly play a role in blocking groundwater, thereby reducing the scouring effect of groundwater on the columnar plugging structure, and enabling the slurry of the columnar plugging structure to solidify smoothly.

[0013] Optionally, the rubber damping member includes a metal core tube, a pipe cap is provided at the lower end of the metal core tube, the metal core tube is provided with a longitudinal cutting seam, a rubber film sealing layer is coated on the outer periphery of the metal core tube, and a reaming member is inserted at the upper end of the metal core tube. When the reaming member approaches the pipe cap, the reaming member can force the metal core tube to expand and deform outward.

[0014] By adopting the above technical solution, after the rubber damping member is inserted into the bottom of the detection tube, a downward pressure is applied to the reaming member inside the metal tube core by using a rod, so that the reaming member moves downward to force the metal tube core to expand and deform outward, and the metal tube core expands and presses the rubber film sealing layer and the detection tube radially, so that the rubber damping member can be firmly stuck in the detection tube.

[0015] Optionally, after the rubber damping member is loaded and before grouting and plugging, a mobile water pump is used to pump out the groundwater in the detection hole.

[0016] By adopting the above technical solution, after the rubber damping member blocks the bottom of the detection tube, a mobile water pump is used to suck the groundwater in the detection hole. After the groundwater in the detection hole is pumped out, grouting and plugging are immediately carried out in the detection hole to reduce the dilution effect of groundwater on the slurry.

[0017] Optionally, the mobile water pump has a drain pipe, the drain pipe is a flexible pipe, the drain pipe can extend to a height position lower than the bottom of the foundation pit, a three-way joint is connected between the drain pipe and the water outlet of the mobile water pump, two of the ports of the three-way joint are respectively connected to the water outlet of the mobile water pump and the drain pipe, and another port of the three-way joint is provided with a bypass pipe, the bypass pipe is arranged upward, and the bypass pipe is provided with a switch valve.

[0018] By adopting the above technical solution, before the mobile water pump pumps water, a large amount of water is pre-injected into the drain pipe through the bypass pipe first, and then the switch valve is closed. During the flow of the water in the drain pipe, a suction force can be generated on the inner cavity of the mobile water pump, making it easier for the mobile water pump to suck the groundwater in the detection hole.

[0019] Optionally, when the mobile water pump drains water, the drain pipe extends into other detection tubes that do not leak water.

[0020] By adopting the above technical solution, the drain pipe extends into the non-leaking inspection pipe, making full use of the height difference between the bottom of the non-leaking inspection pipe and the bottom of the foundation pit, which is beneficial to reducing the actual suction lift during the pumping process of the mobile water pump.

[0021] Optionally, before the grouting plugging construction, a slurry pit is excavated in the site. The slurry pit is used to collect the waste slurry, and the consolidated slurry in the slurry pit is dug out for treatment after solidification.

[0022] By adopting the above technical solution, using the slurry pit to collect the waste slurry during the grouting plugging construction is beneficial to maintaining the working environment inside the foundation pit. When the slurry solidifies in the slurry pit, it is convenient for centralized external transportation and treatment.

[0023] Optionally, during the grouting plugging process, a light well point is arranged in the foundation pit for dewatering.

[0024] By adopting the above technical solution, during the plugging of the inspection hole, a light well point is simultaneously set for dewatering, which lowers the water level of the groundwater at the bottom of the foundation pit, making it difficult for the groundwater to squeeze the slurry in the inspection hole, and is beneficial to the smooth solidification process of the slurry in the inspection hole.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. The mixed slurry of cement paste and sodium silicate can solidify quickly, so as to achieve the purpose of quickly plugging the inspection hole and shortening the cycle of the plugging construction. The inspection pipe is crushed by the drilling equipment. After the grouting work is completed, the slurry solidifies to form a columnar plugging structure, and the columnar plugging structure is tightly combined with the soil body, which can form a reliable plugging effect on the inspection hole.

[0026] 2. The plugging filler is stuffed into the bottom of the inspection pipe, and the rubber damping part is used for plugging and limiting, so that the plugging filler and the rubber damping part jointly play the role of blocking groundwater, thereby reducing the scouring effect of groundwater on the columnar plugging structure and enabling the slurry of the columnar plugging structure to solidify smoothly. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic flow chart of the method for grouting plugging with the mixed slurry of cement paste and sodium silicate in Embodiment 1.

[0028] Figure 2 is a schematic diagram of the state before plugging the inspection hole in Embodiment 1.

[0029] Figure 3 is a schematic diagram of the state after the plugging construction of the inspection hole in Embodiment 2.

[0030] Figure 4 is a schematic diagram of the installation state of the rubber damping part in Embodiment 3.

[0031] Figure 5 It is a schematic diagram of the working state of the mobile water pump in Example 3.

[0032] Description of reference numerals: 1. Detection hole; 2. Detection tube; 3. Mixed slurry; 4. Plastic tube; 41. Plastic film inner layer; 5. Scraper; 51. Vertical rod; 52. Horizontal rod; 6. Sealing filler; 7. Rubber damping part; 71. Metal core tube; 711. Cutting seam; 72. Pipe cap; 73. Rubber film sealing layer; 75. Hole expansion part; 8. Mobile water pump; 81. Drain pipe; 82. Three-way joint; 83. Bypass pipe; 84. Switch valve. DETAILED DESCRIPTION

[0033] The following is combined with Figures 1-5 This application is described in further detail.

[0034] Example 1 The present application embodiment discloses a method for plugging leaks by grouting a mixture of cement slurry and water glass. Figure 1 The method of plugging leakage by mixing cement slurry and water glass includes the following steps: Step 1: Before the grouting and plugging construction, a mud pool is excavated on site to collect waste slurry. The mud pool is first excavated with an excavator to form the main shape of the mud pool, and then manually trimmed to a specified size. In this embodiment, the specific size is set to: length × width × depth: 2000mm × 1500mm × 1000mm; Step 2, according to the position of the detection hole 1, two columns with a length and width of 300 mm and a height of about 0.5 m are built at a low position in the foundation pit with solid bricks, and an I-beam track for installing the plugging construction equipment is set up between the two columns to ensure that the plugging construction equipment is placed horizontally, and three 6m long steel pipes are used to set up a tripod on the top of the location where the plugging construction equipment is placed, and an upward traction force is applied to the plugging construction equipment through the tripod to ensure mechanical stability; the plugging construction equipment includes a double-liquid grouting machine and drilling equipment, etc.; Step 3, drilling with a drilling device in a manner of crushing the detection tube 2, so that the detection hole 1 originally affected by the detection tube 2 is partially or completely exposed, the drilling depth is greater than 10m, and the diameter of the drill rod of the drilling device is greater than the outer diameter of the detection tube 2; Step 4, using a double-liquid grouting machine to grout the inside of the detection hole 1; the grouting uses a 42.5 ordinary Portland cement + water glass mixture, the water-cement ratio is 0.55-0.60, and the water glass: cement = 1:1; During grouting, the grouting pipe of the double-liquid grouting machine is extended into the bottom of the detection hole 1. The double-liquid grouting machine injects the mixture of cement slurry and water glass into the detection hole 1 through the grouting pipe. As the grouting process proceeds, the grouting pipe is gradually lifted up; after grouting, the slurry solidifies into a columnar plugging structure.

[0035] Step 5, transport the solidified waste slurry in the slurry pit out for treatment.

[0036] In the above process, Step 1 can be carried out simultaneously with Step 2.

[0037] The implementation principle of the method for plugging leakage by mixing cement slurry and water glass in the embodiment of the present application is as follows: Compared with conventional cement slurries, the mixed slurry 3 of cement slurry and water glass can solidify quickly, so as to achieve the purpose of plugging the detection hole 1 as soon as possible and shortening the construction period of leakage plugging. The detection tube 2 is crushed by drilling equipment. After the grouting work is completed, the slurry solidifies to form a columnar leakage plugging structure, and the columnar leakage plugging structure is closely combined with the soil body, which can form a reliable plugging effect on the upper end of the detection hole 1. After the detection tube 2 is crushed, the passage between the upper end of the detection hole 1 and the bottom of the foundation pit is cut off, making it difficult for groundwater to seep upward along the detection hole 1 into the foundation pit.

[0038] During the process of plugging leakage by grouting in this embodiment, a light well point is arranged in the foundation pit for dewatering at the same time; the light well point dewatering starts during the process from Step 1 to Step 2. The procedures of the light well point dewatering include: breaking the cushion layer of the foundation pit, setting out and positioning the well points, excavating the well point trench, installing the high-pressure water pump, drilling holes and installing and burying the well point pipes, arranging and installing the main pipe, connecting the well point pipes and the main pipe, installing the pumping equipment, trial pumping and inspection, and putting into the dewatering program.

[0039] After the light well point dewatering is completed, the well point pipes are pulled out, and the holes are plugged by grouting. The plugging of the grouting pipes is carried out by high-pressure grouting for recharging and plugging, and the plugging material is a mixture of cement and water glass.

[0040] Embodiment 2 Refer to Figure 2 , the difference between this embodiment and Embodiment 1 is that after the grouting is completed inside the detection hole 1 in this embodiment, a plastic pipe cylinder 4 is inserted into the soil body in the area corresponding to the columnar leakage plugging structure, and a mixed slurry 3 of cement slurry and water glass is injected into the plastic pipe cylinder 4.

[0041] The diameter of the plastic pipe cylinder 4 is larger than the diameter of the columnar leakage plugging structure, and the inner wall of the plastic pipe cylinder 4 is provided with a plastic film inner layer 41, and the plastic film inner layer 41 can separate the slurry from the inner wall of the plastic pipe cylinder 4. The plastic film inner layer 41 is made by laying a plastic film along the inner wall of the plastic pipe cylinder 4, and both sides of the plastic film are joined inside the plastic pipe cylinder 4 and bonded and closed with tape.

[0042] Refer to Figure 2, a scraping member 5 is pre-placed in the plastic pipe cylinder 4. The scraping member 5 includes a vertical rod 51 and a horizontal rod 52. The midpoint of the vertical rod 51 is fixedly connected to the horizontal rod 52. The length of the horizontal rod 52 is less than or equal to the inner diameter of the plastic pipe cylinder 4 and greater than the diameter of the columnar plugging structure. The length of the vertical rod 51 is greater than the length of the plastic pipe cylinder 4. The horizontal rod 52 is a strip-shaped sheet structure, and the two long sides of the horizontal rod 52 exceed the horizontal direction.

[0043] The slurry in the plastic pipe cylinder 4 can form a downward pressure on the slurry of the columnar plugging structure, which is beneficial to making the slurry of the columnar plugging structure more dense during the solidification process and improving the plugging effect of the columnar plugging structure. During the solidification process of the slurry in the plastic pipe cylinder 4, the vertical rod 51 of the scraping member 5 can be rotated to make the horizontal rod 52 rotate and sweep the interface position between the slurry in the plastic pipe cylinder 4 and the slurry of the columnar plugging structure, so as to prevent the cement slurry in the plastic pipe cylinder 4 from combining with the columnar plugging structure into a whole. After the columnar plugging structure solidifies, the solidified slurry in the plastic pipe cylinder 4 and the inner layer 41 of the plastic film can be taken out of the plastic pipe cylinder 4 at the same time.

[0044] Embodiment 3 Refer to Figure 3 , the difference between this embodiment and Embodiment 1 is that before grouting the detection hole 1, a plugging filler 6 is first stuffed into the remaining detection tube 2. The plugging filler material is a flexible material such as filter cloth, non-woven fabric, plastic film, etc. Then a rubber damping member 7 is filled above the plugging filler 6.

[0045] The rubber damping member 7 includes a metal core tube 71. A tube cap 72 is provided at the lower end of the metal core tube 71. The tube cap 72 is in interference fit with the metal core tube 71. The metal core tube 71 is provided with a longitudinal cutting seam 711. A rubber film sealing layer 73 is wrapped around the outer periphery of the metal core tube 71. An expanding member 75 is inserted at the upper end of the metal core tube 71. The expanding member 75 is a short wooden column, and one end of the short wooden column is ground to form a chamfer. In addition, a hard sphere with a diameter larger than the inner diameter of the metal core tube 71 and smaller than the inner diameter of the detection tube 2 can also be used as the expanding member 75. When the expanding member 75 approaches the tube cap 72, the expanding member 75 can force the metal core tube 71 to expand and deform outward.

[0046] Before or after drilling with a drilling device, the plugging filler 6 is stuffed into the bottom of the detection tube 2, and the rubber damping member 7 is used for plugging and limiting. During the process of using the rubber damping member 7 for plugging, first insert the rubber damping member 7 into the bottom of the detection tube 2, and then apply a downward pressure to the expanding member 75 inside the metal tube core with a rod to make the expanding member 75 move downward, so as to force the metal tube core to expand and deform outward, and make the metal tube core expand radially outward to squeeze the rubber film sealing layer 73 and the detection tube 2, so that the rubber damping member 7 can be firmly stuck in the detection tube 2, and the plugging filler 6 and the rubber damping member 7 jointly play the role of blocking groundwater.

[0047] In another embodiment, the rubber damping member 7 can be replaced with a cylindrical structure formed by rolling a rubber film. The rubber damping member 7 formed by rolling the rubber film can be bundled and fixed using tape.

[0048] After the rubber damping member 7 is loaded and before grouting for leak stoppage, a mobile water pump 8 is used to drain the groundwater in the detection hole 1.

[0049] Refer to Figure 4 , the mobile water pump 8 has a drain pipe 81. The drain pipe 81 is a flexible pipe. A tee joint 82 is connected between the drain pipe 81 and the water outlet of the mobile water pump 8. Two of the ports of the tee joint 82 are respectively connected to the water outlet of the mobile water pump 8 and the drain pipe 81. Another port of the tee joint 82 is provided with a bypass pipe. The bypass pipe is arranged upward. The bypass pipe is provided with a switch valve 84. The switch valve 84 is a ball valve or a globe valve, etc. In order to facilitate water injection into the bypass pipe, a funnel can be provided at one end of the bypass pipe away from the tee joint 82.

[0050] When the mobile water pump 8 drains water, the drain pipe 81 is extended into other non-leaking detection pipes 2. A large amount of water is pre-injected into the drain pipe 81 through the bypass pipe, and then the switch valve 84 is closed. During the flow of the water in the drain pipe 81, a suction force can be generated on the inner cavity of the mobile water pump 8, making it easier for the mobile water pump to suck the groundwater in the detection hole 1. After the groundwater in the detection hole 1 is drained, grouting for leak stoppage is immediately carried out in the detection hole 1 to reduce the dilution effect of the groundwater on the slurry.

[0051] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereby. Therefore, all equivalent changes made according to the structure, shape, and principle of the present application should be covered within the protection scope of the present application.

Claims

1. A method for plugging leaks by grouting a mixture of cement slurry and water glass, characterized in that: The steps include: Drilling a hole by using a drilling device in a manner of crushing the detection tube (2) so that the detection hole (1) originally affected by the detection tube (2) is partially or completely exposed, and the diameter of the drill rod of the drilling device is larger than the outer diameter of the detection tube (2); A double-liquid grouting machine is used to grout the inside of the detection hole (1); during grouting, the grouting pipe of the double-liquid grouting machine is extended into the bottom of the detection hole (1), and the double-liquid grouting machine injects a mixture of cement slurry and water glass into the detection hole (1) through the grouting pipe. As the grouting process proceeds, the grouting pipe is gradually lifted up; after grouting, the slurry solidifies into a columnar plugging structure.

2. The method for plugging leaks by grouting a mixture of cement slurry and water glass according to claim 1, characterized in that: After grouting is completed on the inside of the detection hole (1), a plastic tube (4) is inserted into the soil in the area corresponding to the columnar plugging structure. The inner wall of the plastic tube (4) is provided with a plastic film inner layer (41). The diameter of the plastic tube (4) is larger than the diameter of the columnar plugging structure. A mixed slurry (3) of cement slurry and water glass is injected into the plastic tube (4).

3. The method for plugging leaks by grouting a mixture of cement slurry and water glass according to claim 2, characterized in that: A scraper (5) is pre-placed in the plastic tube (4), and the scraper (5) comprises a vertical rod (51) and a horizontal rod (52). The vertical rod (51) is fixedly connected to the midpoint of the horizontal rod (52). The length of the horizontal rod (52) is less than or equal to the inner diameter of the plastic tube (4), and the length of the vertical rod (51) is greater than the length of the plastic tube (4). The horizontal rod (52) can be used to rotate and scan the interface between the slurry in the plastic tube (4) and the slurry of the columnar plugging structure.

4. The method for plugging leaks by grouting a mixture of cement slurry and water glass according to claim 1, characterized in that: Before grouting the detection hole (1), a plugging filler (6) is first inserted into the remaining detection tube (2), and a rubber damping member (7) is filled above the plugging filler (6).

5. The method for plugging leaks by grouting a mixture of cement slurry and water glass according to claim 4, characterized in that: The rubber damping member (7) comprises a metal core tube (71), a tube cap (72) is provided at the lower end of the metal core tube (71), a section seam (711) extending in the longitudinal direction is provided at the metal core tube (71), a rubber film sealing layer (73) is covered on the outer periphery of the metal core tube (71), and a hole expansion member (75) is inserted at the upper end of the metal core tube (71), and when the hole expansion member (75) is close to the tube cap (72), the hole expansion member (75) can force the metal core tube (71) to expand outward and deform.

6. The method of plugging leaks by grouting a mixture of cement slurry and water glass according to claim 4, characterized in that: After the rubber damping member (7) is filled and before grouting to stop leakage, a mobile pump (8) is used to pump out the groundwater in the detection hole (1).

7. A method for plugging leaks by grouting a mixture of cement slurry and water glass according to claim 6, characterized in that: The mobile water pump (8) has a drainage pipe (81), which is a hose. The drainage pipe (81) can extend to a height position lower than the bottom of the foundation pit. A three-way joint (82) is connected between the drainage pipe (81) and the water outlet of the mobile water pump (8). Two ports of the three-way joint (82) are respectively connected to the water outlet of the mobile water pump (8) and the drainage pipe (81), and the other port of the three-way joint (82) is provided with a bypass pipe, which is arranged upward and is provided with a switch valve (84).

8. The method of plugging leaks by grouting a mixture of cement slurry and water glass according to claim 7, characterized in that: When the mobile water pump (8) drains water, the drainage pipe (81) extends into other detection pipes (2) that are not leaking.

9. The method for plugging leaks by grouting a mixture of cement slurry and water glass according to claim 1, characterized in that: Before the grouting and plugging construction, a mud pool is excavated on site to collect waste slurry. The mud in the mud pool is dug out and processed after solidification.

10. The method for plugging leaks by grouting a mixture of cement slurry and water glass according to claim 1, characterized in that: During the grouting and plugging process, light well points are set up in the foundation pit to reduce water levels.

Images