Anchor hole sealer and hole sealing grouting method

Abstract

The embodiment of the present invention discloses an anchor hole sealer and a hole sealing grouting method, which relates to the technical field of hole sealing grouting, and is invented to improve the uneven surface of the borehole wall after drilling and enhance the sealing effect. The anchor hole sealer includes a grouting pipe; the positioning pipe is fixed to the surface of the grouting pipe by a first fixing pad, a second fixing pad, a first soft plug and a second soft plug; the first fixing pad is installed at the first end of the positioning pipe; the second fixing pad is installed at the second end of the positioning pipe; wherein the top of the first fixing pad has a conical head, the bottom of the first fixing pad has a socket, and the top and bottom of the second fixing pad both have sockets; the pipe sleeve is sleeved on the outer surface of the positioning pipe; the first soft plug is installed at the first end of the positioning pipe, and is arranged close to the first fixing pad; the second soft plug is installed at the second end of the positioning pipe, and is arranged close to the second fixing pad; the sealing pipe is inserted into the grouting pipe through the socket of the second fixing pad through the second soft plug.

Description

Technical Field

[0001] The invention relates to the technical field of hole sealing and grouting, and in particular to an anchor hole sealing device and a hole sealing and grouting method. Background Art

[0002] With the improvement of living standards, people's demand for coal energy is also increasing. In the process of coal resource exploitation, there are a large number of micropores, microcracks and cleat surfaces of different lengths in the coal structure of the surrounding rock of deep coal mine tunnels. The mechanical properties are quite different from those of sandstone and shale. During the stress process of coal rock, stress concentration is very likely to occur at the tips of microcracks in the coal rock, which makes the coal structure extremely heterogeneous and anisotropic. The uniaxial compressive strength and elastic modulus of the coal structure are low, which leads to irregular formation of coal side drilling and uneven drilling surface, which increases the difficulty of sealing the hole and advancing the soft plug, especially the near-horizontal side anchor cable. Summary of the invention

[0003] In view of this, the present invention proposes an anchor hole sealer and a hole sealing grouting method, which improves the uneven surface of the borehole wall after drilling and improves the sealing effect.

[0004] To achieve the above object, the present invention provides the following technical solutions: An embodiment of the present invention provides an anchor hole sealer, comprising a grouting tube; a positioning tube, wherein the positioning tube is fixed to the surface of the grouting tube by a first fixing pad, a second fixing pad, a first soft plug and a second soft plug; a first fixing pad, wherein the first fixing pad is mounted on the first end of the positioning tube; a second fixing pad, wherein the second fixing pad is mounted on the second end of the positioning tube; wherein the top end of the first fixing pad has a conical head, the bottom end of the first fixing pad has a socket, and the top and bottom ends of the second fixing pad both have sockets; a pipe sleeve, wherein the pipe sleeve is sleeved on the outer surface of the positioning tube; a first soft plug, wherein the first soft plug is mounted on the first end of the positioning tube and is arranged near the first fixing pad; a second soft plug, wherein the second soft plug is mounted on the second end of the positioning tube and is arranged near the second fixing pad; and a plugging tube, wherein the plugging tube is passed through the socket of the second fixing pad and the second soft plug to penetrate into the interior of the grouting tube.

[0005] Optionally, the sleeve includes a first sleeve and a second sleeve; the first sleeve is provided with a threaded protrusion at the contact point between the first sleeve and the first soft plug; the second sleeve is provided with a threaded protrusion at the contact point between the second sleeve and the second soft plug; and the first sleeve and the second sleeve have adsorption properties to the sealing material in the sealing tube.

[0006] Optionally, the anchor hole sealer is further provided with an exhaust pipe; the exhaust pipe is passed through the interior of the second soft plug, and the bottom end of the exhaust pipe is arranged close to the top end of the first soft plug.

[0007] Optionally, the material used for the first fixing pad and the second fixing pad includes a hard material; the material used for the first pipe sleeve and the second pipe sleeve is a soft material.

[0008] Optionally, the anchor hole sealer may be further provided with a coupler; the coupler is passed through the anchor hole sealer, the diameter of the first end of the coupler is smaller than the diameter of the second end of the coupler, and the surface of the coupler is provided with elastic protrusions.

[0009] In a second aspect, the present invention further provides a sealing grouting method, comprising: Optionally, according to the actual needs of the site, a drill bit with a diameter range of 40-100 mm is selected to start drilling. After the drilling distance reaches the first preset distance, a drill bit with a diameter range of 10-40 mm is used to drill until the bottom of the hole; A first hole with a diameter range of 40-100 mm and a second hole with a diameter range of 10-40 mm are connected through a connecting pipe, and then an anchoring agent is pushed into the connecting pipe. After the anchoring agent is pushed to the bottom of the hole through the anchor rod body, the connecting pipe is removed, and the anchor rod body is driven by a drilling rig to stir the anchoring agent to complete the anchoring of the end of the anchor cable; Push the first soft plug into the first hole, and first use the anchor cable to push the pipe to continue to push the second preset distance, and then connect the rear pad through the push rod to continue to push it to the third preset distance in the first hole; Install the anchor cable tray lock onto the anchor cable rod body, and adjust the anchor cable rod body to the middle of the borehole. Use the anchor cable puller to pre-tension the anchor cable to the initial value. Then inject the sealing material into the anchor cable soft plug through the sealing gun to react and fill the internal space of the anchor cable. Shake the anchor cable exposed head appropriately to discharge the residual gas in the anchor cable rod body, complete the sealing of the anchor cable borehole, and then carry out the sealing construction of the next anchor cable hole until all the anchor cable holes are sealed. Shake the exposed head of the grouting pipe to check the sealing effect, connect the grouting pipe in the auxiliary anchor cable and the grouting pipeline of the grouting pump through a connector with a valve by means of threaded connection or snap connection, then turn on the grouting pump to inject the grouting material, and after the grouting pressure reaches the first preset pressure value for a period of time, close the valve to maintain the grouting pressure in the auxiliary anchor cable borehole, remove the first orifice grouting pipeline of the grouting pump, until all the auxiliary anchor cable holes are grouted; 3 to 30 days after the grouting process is completed, when the grouting material hardens to the preset hardening value, it is tensioned for the second time to the final design value through the anchor rod and cable puller.

[0010] Optionally, after selecting a drill bit with a diameter range of 40 to 100 mm and a drill bit with a diameter range of 10 to 40 mm for drilling, it is necessary to observe the conditions inside the hole, including the roughness of the hole wall and the drilling residue, and clean the inside of the hole with water or wind.

[0011] Optionally, when the first soft plug is pushed to the third preset distance, it is necessary to check whether the second soft plug is damaged. If damaged, cotton yarn can be stuffed in or crack filler can be injected to enhance the sealing effect.

[0012] Optionally, shake the exposed end of the grouting pipe to check the sealing effect. If the sealing effect is not good, it is necessary to drill an oblique hole from the edge of the tray to the sealing section, install the sealing pipe, and then inject the sealing material until the grouting pipe is completely fixed.

[0013] The present invention provides an anchor hole sealer and a sealing grouting method, wherein a positioning tube is fixed to a surface by a first fixing pad, a second fixing pad, a first soft plug and a second soft plug, a first fixing pad and a second fixing pad with a conical head at the top are installed at the second end of the positioning tube, and a pipe sleeve is sleeved on the outer surface of the positioning tube, and soft plugs are installed at positions close to the fixing pads at both ends of the positioning tube, and a sealing tube is inserted into the grouting tube through an insertion hole opened on the fixing pad, so that the anchor hole sealer is fixed to the inside of the anchor hole by the joint action of the fixing pad and the soft plug, and at the same time, the sealing material is adsorbed by the pipe sleeve, thereby reducing the difficulty of the sealing process and the advancement of the sealing plug, and improving the overall sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the overall structure of an anchor hole sealer in one embodiment of the present invention; Figure 2 It is a schematic diagram of the anchor cable hole sealer in one embodiment of the present invention in operation; Figure 3 The diagram is a structural diagram of an anchor hole sealer equipped with a connecting pipe in one embodiment of the present invention. DETAILED DESCRIPTION

[0016] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0017] It should be clear that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0018] The embodiment of the present invention provides an anchor hole sealer and a hole sealing grouting method, which improves the uneven surface of the borehole wall and improves the sealing effect.

[0019] The present invention is further described in detail below with reference to the accompanying drawings.

[0020] See also Figure 1 , Figure 2 The embodiment of the present invention provides an anchor hole sealer, comprising a grouting pipe 11; a positioning pipe 12, wherein the positioning pipe 12 is fixed to the surface of the grouting pipe 11 through a first fixing pad 131, a second fixing pad 132, a first soft plug 141 and a second soft plug 142; a first fixing pad 131, wherein the first fixing pad 131 is installed at the first end of the positioning pipe 12; a second fixing pad 132, wherein the second fixing pad 132 is installed at the second end of the positioning pipe 12; wherein the top end of the first fixing pad 131 has a conical head (not shown in the figure), and ... The bottom end has a plug hole, and the top and bottom ends of the second fixing pad both have plug holes; the pipe sleeve 15, the pipe sleeve 15 is sleeved on the outer surface of the positioning pipe 12; the first soft plug 141, the first soft plug 141 is installed at the first end of the positioning pipe 12, and is arranged near the position of the first fixing pad 131; the second soft plug 142, the second soft plug 142 is installed at the second end of the positioning pipe 12, and is arranged near the position of the second fixing pad 132; the plugging pipe 16, the plugging pipe 16 is passed through the plug hole of the second fixing pad 132 and the second soft plug 142 to penetrate the inside of the grouting pipe 11; Among them, the first fixing pad, the second fixing pad, the first soft plug and the second soft plug fix the positioning tube on the surface of the grouting tube, so that the positions of the grouting tube and the positioning tube are relatively fixed to prevent movement during operation; the conical head at the top of the first fixing pad is a hollow structure; the pipe sleeve is arranged on the outer surface of the positioning tube, and the first soft plug and the second soft plug are sealed by the pipe sleeve, so that the front and rear first soft plug and the second soft plug form a fully enclosed structure.

[0021] The present invention provides an anchor hole sealer and a sealing grouting method, wherein a positioning tube is fixed to a surface by a first fixing pad, a second fixing pad, a first soft plug and a second soft plug, a first fixing pad and a second fixing pad with a conical head at the top are installed at the second end of the positioning tube, and a pipe sleeve is sleeved on the outer surface of the positioning tube, and soft plugs are installed at positions close to the fixing pads at both ends of the positioning tube, and a sealing tube is inserted into the grouting tube through an insertion hole opened on the fixing pad, so that the anchor hole sealer is fixed to the inside of the anchor hole by the joint action of the fixing pad and the soft plug, and at the same time, the sealing material is adsorbed by the pipe sleeve, thereby reducing the difficulty of the sealing process and the advancement of the sealing plug, and improving the overall sealing effect.

[0022] See also Figure 1 In some embodiments, the sleeve 15 includes a first sleeve 151 and a second sleeve 152; the first sleeve 151, a threaded protrusion is provided at the contact point between the first sleeve 151 and the first soft plug 141; the second sleeve 152, a threaded protrusion is provided at the contact point between the second sleeve 152 and the second soft plug 142; and the first sleeve 151 and the second sleeve 152 have adsorption properties to the sealing material in the sealing tube 16; wherein, the threaded protrusion provided on the first sleeve can better fit the gaps and depressions on the borehole wall, and the threaded protrusion provided on the second sleeve can better fit the gaps on the surface of the anchor rod body, so that the anchor rod body and the borehole wall can be kept relatively fixed by the action of the first sleeve and the second sleeve, and the first sleeve and the second sleeve have adsorption properties to the sealing material, which can reduce the flow rate of the sealing material during the sealing operation.

[0023] See also Figure 1 In some embodiments, the anchor cable sealer is also equipped with an exhaust pipe 17; the exhaust pipe 17 is passed through the second soft plug 142, and the bottom end of the exhaust pipe 17 is arranged near the top of the first soft plug 141; in this way, because the sealing material will react and produce gas after entering the first soft plug, the large amount of gas produced by the reaction cannot be quickly discharged by simply shaking the anchor cable outcrop, which may cause damage to the borehole. Therefore, an exhaust pipe is arranged on the top of the first soft plug, and the gas flows upward, and the gas produced by the reaction can be discharged through the exhaust pipe, thereby ensuring safety during sealing.

[0024] See also Figure 1 In some embodiments, the material used for the first fixed pad 131 and the second fixed pad 132 includes a hard material; the material used for the first pipe sleeve 151 and the second pipe sleeve 152 is a soft material; wherein, the hard material used for the first fixed pad and the second fixed pad includes steel, aluminum, and PVC material to prevent the fixed pad from falling off when pushed; the soft material used for the first sleeve and the second sleeve includes cloth and fiber to ensure that the sleeve has a certain toughness and makes the sleeve have better mechanical properties of compression resistance and bending resistance.

[0025] See also Figure 1 , Figure 3 In some embodiments, the anchor hole sealer can also be equipped with a coupler 18; the coupler 18 is inserted into the anchor hole sealer, the diameter of the first end of the coupler 18 is smaller than the diameter of the second end of the coupler 18, and the surface of the coupler 18 is provided with elastic protrusions; wherein, because the first end of the coupler is equipped with a first hole tube, and the second end is equipped with a second hole tube, the diameter of the first hole tube is smaller than the diameter of the second hole tube, so the diameter of the first end of the coupler is smaller than the diameter of the second end of the coupler, and the first hole tube and the second hole tube are connected by a tapered tube, and the length of the second hole tube is much greater than the length of the first hole tube; in order to ensure the strength of the coupler, the material used for the coupler is a hard material, including steel, aluminum, and PVC material; the purpose of providing the elastic protrusions on the surface of the coupler is to facilitate the fixing of the connecting tube to prevent rotation or movement during the pushing process.

[0026] This embodiment also provides a hole sealing grouting method, which can be implemented using the above-mentioned anchor hole sealing device. The method of this embodiment can include the following steps: S11. According to the actual needs of the site, a drill bit with a diameter range of 40-100 mm is selected to start drilling. After the drilling distance reaches the first preset distance, a drill bit with a diameter range of 10-40 mm is used to drill until the bottom of the hole; S12, connecting the first hole with a diameter range of 40-100 mm and the second hole with a diameter range of 10-40 mm through a connecting pipe, then pushing the anchoring agent into the connecting pipe, pushing the anchoring agent to the bottom of the hole through the anchor rod body, removing the connecting pipe, and using the drilling rig to drive the anchor rod body to stir the anchoring agent to complete the anchoring of the end of the anchor cable; S13, pushing the first soft plug into the first hole, and first using the anchor cable to push the pipe to continue to push the second preset distance, and then connecting the rear pad through the push rod to continue to push the first hole to a third preset distance; S14, install the tray lock of the auxiliary anchor cable on the anchor cable rod body, and adjust the anchor cable rod body to the middle of the drill hole, and use the anchor cable puller to pre-tension the anchor cable to the initial value; then inject the sealing material into the auxiliary anchor cable soft plug through the sealing gun to react and fill the internal space of the auxiliary anchor cable, shake the exposed head of the anchor cable appropriately, and discharge the residual gas in the anchor cable rod body to complete the sealing of the auxiliary anchor cable drill hole, and then carry out the sealing construction of the next auxiliary anchor cable hole until all the auxiliary anchor cable holes are sealed; S15, shaking the exposed head of the grouting pipe to check the sealing effect, connecting the grouting pipe in the auxiliary anchor cable and the grouting pipeline of the grouting pump through a connector with a valve by means of a threaded connection or a buckle connection, then turning on the grouting pump to inject the grouting material, and after the grouting pressure reaches a first preset pressure value for a period of time, closing the valve to maintain the grouting pressure in the auxiliary anchor cable borehole, and removing the first orifice grouting pipeline of the grouting pump until all the auxiliary anchor cable holes are grouted; S16. 3 to 30 days after the grouting process is completed, when the grouting material hardens to the preset hardening value, it is tensioned for the second time to the final design value through the anchor rod and anchor cable puller.

[0027] The sealing grouting method provided by the embodiment of the present invention uses two drill bits with different diameters to drill holes, then uses a connector to connect the two holes with different diameters, pushes an anchoring agent into the connecting pipe and sends it to the bottom of the hole, removes the connecting pipe, and stirs the anchoring agent to achieve end anchoring, then pushes a first soft plug into the drill hole and pushes it to a preset distance in sequence, and then uses a tray lock, an anchor rod and an anchor cable, an anchor cable exposed head and a sealing gun to discharge the residual gas in the anchor cable rod body until all the auxiliary anchor cable holes are sealed, and then turns on the grouting pump to inject grouting material until all the auxiliary anchor cable holes are grouted; after the grouting is completed, wait for 3 to 30 days for the grouting material to harden to the preset value, and then use the anchor rod and anchor cable puller to perform secondary tensioning to the final value, thereby reducing the difficulty of the sealing process and the advancement of the sealing plug and improving the overall sealing effect.

[0028] In some examples, after selecting a drill bit with a diameter range of 40 to 100 mm and a drill bit with a diameter range of 10 to 40 mm for drilling, it is necessary to observe the conditions inside the hole, including the roughness of the hole wall and drilling residues, and clean the inside of the hole with water or wind.

[0029] In some examples, when the first soft plug is pushed to the third preset distance, it is necessary to check whether the second soft plug is damaged. If damaged, cotton yarn can be stuffed in or crack filler can be injected to enhance the sealing effect.

[0030] In some cases, the exposed end of the grouting pipe is shaken to check the sealing effect. If the sealing effect is not good, it is necessary to drill an oblique hole from the side of the tray to the sealing section and install the sealing pipe. Then, the sealing material is injected until the grouting pipe is completely fixed. Among them, the criteria for distinguishing whether the sealing effect is good or bad is to conduct an airtight test and to observe the external conditions with the naked eye. The purpose of the airtight test is to observe whether the gas in the seal is completely discharged, and the purpose of the visual observation is to observe whether the seal is damaged. If the gas in the seal is completely discharged and the seal is not damaged, it proves that the sealing effect is good; if the gas in the seal is not completely discharged or the seal is damaged, it proves that the sealing effect is poor or unqualified.

[0031] The technical features in the technical solution of the method embodiment of the present application are the same or similar to the technical features of the device embodiment, and they can be specifically referenced to each other. This device is the anchor hole sealer described in any of the above embodiments.

[0032] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0033] The above content has described the embodiments of the present invention in detail. Those skilled in the art can design and modify the device and its use within the scope of the present invention according to the on-site construction conditions.

[0034] Each embodiment in this specification is described in a related manner, and the same or similar parts between the embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0035] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An anchor hole sealer, characterized in that: include: Grouting pipe; A positioning pipe, wherein the positioning pipe is fixed to the surface of the grouting pipe through a first fixing pad, a second fixing pad, a first soft plug and a second soft plug; a first fixing pad, the first fixing pad being mounted on the first end of the positioning tube; a second fixing pad, the second fixing pad being mounted on the second end of the positioning tube; The top end of the first fixing pad has a conical head, the bottom end of the first fixing pad has a socket, and the top and bottom ends of the second fixing pad both have sockets; A pipe sleeve, wherein the pipe sleeve is sleeved on the outer surface of the positioning pipe; A first soft plug, which is installed at the first end of the positioning tube and is arranged close to the first fixing pad; a second soft plug, the second soft plug being installed at the second end of the positioning tube and being arranged close to the second fixing pad; A plugging pipe is inserted into the grouting pipe through the insertion hole of the second fixing pad and the second soft plug.

2. The anchor hole sealer according to claim 1, characterized in that: The pipe sleeve comprises a first pipe sleeve and a second pipe sleeve; A first sleeve, wherein a threaded protrusion is provided at a contact point between the first sleeve and the first soft plug; A second sleeve, wherein a threaded protrusion is provided at a contact point between the second sleeve and the second soft plug; Furthermore, the first pipe sleeve and the second pipe sleeve have adsorption properties to the sealing material in the sealing pipe.

3. The anchor hole sealer according to claim 2, characterized in that: The anchor cable hole sealer is also equipped with an exhaust pipe; The exhaust pipe is arranged inside the second soft plug, and the bottom end of the exhaust pipe is arranged close to the top end of the first soft plug.

4. The anchor hole sealer according to claim 2, characterized in that: The material used for the first fixing pad and the second fixing pad includes a hard material; The first sleeve and the second sleeve are made of soft materials.

5. The anchor hole sealer according to claim 1, characterized in that: The anchor hole sealer may also be equipped with a connector; The coupler is inserted into the anchor hole sealer, the diameter of the first end of the coupler is smaller than the diameter of the second end of the coupler, and elastic protrusions are arranged on the surface of the coupler.

6. A sealing grouting method, characterized in that: include: According to the actual needs of the site, select a drill bit with a diameter range of 40~100mm to start drilling. After the drilling distance reaches the first preset distance, use a drill bit with a diameter range of 10~40mm to drill until the bottom of the hole; A first hole with a diameter range of 40-100 mm and a second hole with a diameter range of 10-40 mm are connected through a connecting pipe, and then an anchoring agent is pushed into the connecting pipe. After the anchoring agent is pushed to the bottom of the hole through the anchor rod body, the connecting pipe is removed, and the anchor rod body is driven by a drilling rig to stir the anchoring agent to complete the anchoring of the end of the anchor cable; Push the first soft plug into the first hole, and first use the anchor cable to push the pipe to continue to push the second preset distance, and then connect the rear pad through the push rod to continue to push it to the third preset distance in the first hole; Install the anchor cable tray lock onto the anchor cable rod body, and adjust the anchor cable rod body to the middle of the borehole. Use the anchor cable puller to pre-tension the anchor cable to the initial value. Then inject the sealing material into the anchor cable soft plug through the sealing gun to react and fill the internal space of the anchor cable. Shake the anchor cable exposed head appropriately to discharge the residual gas in the anchor cable rod body, complete the sealing of the anchor cable borehole, and then carry out the sealing construction of the next anchor cable hole until all the anchor cable holes are sealed. Shake the exposed head of the grouting pipe to check the sealing effect, connect the grouting pipe in the auxiliary anchor cable and the grouting pipeline of the grouting pump through a connector with a valve by means of threaded connection or snap connection, then turn on the grouting pump to inject the grouting material, and after the grouting pressure reaches the first preset pressure value for a period of time, close the valve to maintain the grouting pressure in the auxiliary anchor cable borehole, remove the first orifice grouting pipeline of the grouting pump, until all the auxiliary anchor cable holes are grouted; 3 to 30 days after the grouting process is completed, when the grouting material hardens to the preset hardening value, it is tensioned for the second time to the final design value through the anchor rod and cable puller.

7. The hole sealing grouting method according to claim 6, characterized in that: After selecting a drill bit with a diameter range of 40~100mm and a drill bit with a diameter range of 10~40mm for drilling, you need to observe the situation inside the hole, including the roughness of the hole wall and the drilling residue, and clean the inside of the hole with water or wind.

8. The hole sealing grouting method according to claim 7, characterized in that: When the first soft plug is pushed to the third preset distance, it is necessary to check whether the second soft plug is damaged. If damaged, cotton yarn can be stuffed in or crack filler can be injected to enhance the sealing effect.

9. The hole sealing grouting method according to claim 8, characterized in that: Shake the exposed end of the grouting pipe to check the sealing effect. If the sealing effect is not good, it is necessary to drill an oblique hole from the edge of the tray to the sealing section and install the sealing pipe. Then inject the sealing material until the grouting pipe is completely fixed.

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