Combined prefabricated valve well and construction method thereof

Abstract

The combined prefabricated valve well comprises an integrated well chamber, an adjusting ring and a well ring which are sequentially stacked from bottom to top, reserved pipe holes are formed in the two ends of the integrated well chamber, pipe sleeves are arranged at the reserved pipe holes in a sleeving mode, and a first pouring cavity and a second pouring cavity which are distributed in a rectangular mode are formed in the edge of the integrated well chamber; the integrated well chamber is formed by combining the integrated well chamber, the adjusting ring and the well ring in a splicing mode, industrial production and construction are convenient, the construction period is shortened to a certain extent, the labor cost is greatly reduced, the engineering quality is higher than that of a traditional well, the service life is greatly prolonged, and comprehensive benefits are high; by means of the mode that pouring is conducted after on-site assembling, the weight during assembling is reduced, and the problems that in the prior art, the construction amount is increased due to assembling of a combined frame, and the construction difficulty is increased due to prefabrication forming in advance are solved.

Description

Technical Field

[0001] The present invention belongs to the technical field related to valve wells, and in particular relates to a combined prefabricated valve well and a construction method thereof. Background Art

[0002] Valve wells or water meter wells are valves for underground pipelines and underground pipes (such as tap water, oil, and natural gas pipelines). In order to facilitate the opening and closing of part of the pipe network or maintenance operations, a pit (or well) similar to a small room is set up, and valves and water meters are installed and arranged in this pit, which is convenient for regular inspection, cleaning and dredging of pipes to prevent pipe blockage. The water meter wells on the market are mainly brick-built water meter wells and reinforced concrete water meter wells. Although this type of water meter well is cheap, it is still insufficient in terms of service life. The anti-freezing effect of brick-built water meter wells is general, the construction conditions and construction period are long, the service life is short, and the well body usually collapses during soil settlement or geological disasters. The cost of reinforced concrete water meter wells is relatively high, the construction conditions and construction period are long, and the construction is inconvenient. The connection between the pipeline and the well body is a rigid connection, which cannot settle evenly, and the connection port is easy to crack and cause gaps. Due to the continuous increase in labor costs in my country, traditional water meter wells have become increasingly unable to meet the needs of construction sites.

[0003] After searching, the publication number CN212458513U discloses a combined prefabricated water meter well, including a bottom plate, a combined frame and a top plate, the upper surface of the bottom plate and the upper surface of the combined frame are both provided with a card slot, the lower surface of the combined frame and the lower surface of the top plate are both integrally provided with a card plate, the inner surface of the bottom plate, the inner surface of the combined frame and the side surface of the card plate are all provided with a fixing screw hole, the inner thread of the fixing screw hole is connected with a fixing bolt, the upper surface of the top plate is symmetrically provided with two inspection ports, the inner surface of the inspection port is hinged with a cover plate, and the lower surface of the cover plate is glued with a sealing rubber ring. The combined prefabricated water meter well is composed of a bottom plate, a combined frame and a top plate that are mutually connected by a card plate and a card slot, and a corresponding number of combined frames can be installed according to the actual depth requirements of the water meter well, so as to conveniently adjust the depth of the water meter well, improve the flexibility of use, and the water meter and the water inlet pipe can be conveniently maintained through the inspection port, which is easy to operate and convenient to use.

[0004] However, the above-mentioned water meter well technology still has the following problems: the above-mentioned water meter well is composed of three parts: a bottom plate, a combination frame and a top plate. The corresponding number of combination frames are selected according to the depth of the water meter well to splice and fix the upper and lower parts. When installing a water meter well with a larger depth, multiple combination frames are required to be assembled, which will increase the construction workload. In addition, since the bottom plate, combination frame and top plate are all prefabricated as one piece, their weight is large during hoisting, which increases the difficulty of construction. Summary of the invention

[0005] The object of the present invention is to provide a combined prefabricated valve well and a construction method thereof, so as to solve the problems in the above-mentioned background technology that the assembly of combined frames increases the construction workload and the early prefabrication increases the construction difficulty.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a combined prefabricated valve well, comprising an integrated well chamber, an adjustment ring and a well ring stacked in sequence from bottom to top, reserved pipe holes are opened at both ends of the integrated well chamber and pipe sleeves are sleeved at the reserved pipe holes, a first casting cavity and a second casting cavity with rectangular distribution are arranged at the edge of the integrated well chamber, connectors are arranged at the four corners of the top surface of the integrated well chamber, and fasteners corresponding to the connectors are arranged at the four corners of the bottom surface of the adjustment ring;

[0007] The connector includes a fixed disk, the fixed disk is fixed on the integrated well chamber, a leakage hole communicating with the adjacent first casting cavity and the second casting cavity is opened on the fixed disk, a casting hole corresponding to the leakage hole is opened through the adjusting ring, and a steering component capable of opening the leakage hole in cooperation with the fastener and a clamping component driven by the steering component to lock the fastener are arranged on the fixed disk;

[0008] The fastener comprises a pressure cover, which is fixedly embedded in the bottom surface of the adjustment ring, and a pressing component for pressing the steering component to drive the steering component to rotate is slidably arranged in the pressure cover.

[0009] Preferably, the steering component includes a rotating disk, the middle part of which is rotatably connected to the fixed disk via a rotating shaft and a torsion spring is clamped at the connection, a cylinder is fixed at the middle position of the top surface of the rotating disk, a spiral protrusion is provided on the inner wall of the cylinder, and sealing gaskets corresponding to two leakage holes are fixed on both sides of the bottom of the rotating disk.

[0010] Preferably, the clamping component includes an arc-shaped bent rod, one end of which is hinged to the fixed disk via a positioning shaft, a clamping strip is fixed to the outer side surface of one end of the arc-shaped bent rod away from the positioning shaft, a connecting rod is arranged between the rotating disk and the arc-shaped bent rod, and both ends of the connecting rod are respectively hinged to the rotating disk and the arc-shaped bent rod.

[0011] Preferably, an annular groove capable of engaging with a clamping strip is provided on the inner side of the bottom of the gland, and an alignment hole penetrating vertically with the casting hole is provided on the top of the gland.

[0012] Preferably, the pressing component includes a column, a pressing pin is fixed through the bottom of the column and can interfere with the spiral protrusion when pressed down, a guide groove is provided on the cylindrical surface of the column and slidably cooperates with the pressure cover, a pressure plate is fixed in the middle of the column, and the pressure plate is elastically connected to the pressure cover through a spring.

[0013] Preferably, the tops of both ends of the integrated well chamber and the adjustment ring are provided with convex strips, and the bottoms of both ends of the adjustment ring and the well ring are provided with grooves matched with the convex strips.

[0014] Based on the above combined prefabricated valve well, the present invention also proposes a valve well construction method, comprising the following steps:

[0015] Step 1: hoist the integrated well chamber into the valve well so that the axis of the reserved opening is consistent with the axis of the integrated well chamber;

[0016] Step 2: hoist the adjustment ring on the integrated well chamber so that the adjustment ring is consistent with the axis of the integrated well chamber, the gland is covered outside the fixed plate, the steering component rotates under the top pressure of the top pressure component, and the rotating steering component pushes the holding component to lock the gland. At the same time, the rotation of the steering component avoids the leakage hole, so that the casting hole and the leakage hole are connected up and down;

[0017] Step 3: inserting a pipe sleeve into the reserved pipe hole of the integrated well chamber, and then pouring concrete into the first pouring cavity and the second pouring cavity through the pouring hole, and fixing the pipe sleeve in the reserved pipe hole after the concrete in the second pouring cavity solidifies;

[0018] Step 4: After the integrated well chamber and the adjustment ring are fixed together, the gap at the joint is treated with M waterproof cement slurry;

[0019] Step 5: hoist the well ring on the upper layer of the adjustment ring, and treat the fitting position between the well ring and the adjustment ring with M waterproof cement slurry.

[0020] Compared with the prior art, the present invention provides a combined prefabricated valve well and a construction method thereof, which has the following beneficial effects:

[0021] 1. The present invention adopts an integrated well chamber, an adjustment ring and a well ring assembled in an industrialized production manner, which is convenient to construct, shortens the construction period to a certain extent, greatly reduces the labor cost, has a higher engineering quality than the traditional water well, has a greatly improved service life, and has a high comprehensive benefit. At the same time, the integrated well chamber adopts a hollow structure, which is assembled on site and then cast, thereby reducing the weight during assembly, and solving the problems in the prior art of increasing the construction workload due to the assembly of the combined frame and increasing the construction difficulty due to prefabrication in advance;

[0022] 2. The present invention provides a connector on the integrated well chamber, and a fastener corresponding to the connector is provided on the adjustment ring. When the adjustment ring is hoisted on the integrated well chamber so that the axis of the adjustment ring and the integrated well chamber are aligned, the gland can be covered outside the fixed plate, and the steering component rotates under the top pressure of the top pressure component, and the rotating steering component pushes the holding component to lock the gland, thereby realizing the positioning assembly of the integrated well chamber and the adjustment ring;

[0023] 3. After the positioning and assembly of the integrated well chamber and the adjustment ring of the present invention is completed, the rotation of the steering component can avoid the leakage hole, so that the casting hole and the leakage hole are connected up and down, and then concrete slurry can be injected into the first casting cavity and the second casting cavity through the casting hole, so that after solidification, it forms a whole with the steel mesh in the first casting cavity and the second casting cavity, thereby improving the structural stability of the well chamber;

[0024] 4. In the initial state, the rotating disk of the present invention is acted upon by the elastic force of the torsion spring so that the gasket is located above the leak hole, thereby blocking the leak hole to prevent debris from clogging the leak hole. The two arc-shaped bent rods are pulled toward the center of the fixed disk by the connecting rod, thereby avoiding the pressure cover sleeve from being placed outside the fixed disk to facilitate subsequent positioning and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0026] Figure 1 This is a schematic diagram of a combined prefabricated valve well after assembly proposed by the present invention;

[0027] Figure 2 A schematic diagram of the decomposition structure of a combined prefabricated valve well proposed by the present invention;

[0028] Figure 3 A schematic diagram of the structure of a combined prefabricated valve well proposed by the present invention is shown in another perspective;

[0029] Figure 4 A schematic diagram of the distribution of the leakage holes, the first casting cavity and the second casting cavity proposed by the present invention;

[0030] Figure 5 This is a schematic diagram of a half-section structure of the integrated well chamber proposed by the present invention;

[0031] Figure 6 This is a schematic diagram of the connector structure proposed by the present invention;

[0032] Figure 7 This is a schematic diagram of the top view structure of the connector proposed by the present invention;

[0033] Figure 8 This is a schematic diagram of the structure of the fastener proposed by the present invention;

[0034] Fig. 9 This is a schematic diagram of the structure of the top pressing component proposed by the present invention;

[0035] In the figure: 1. integrated well chamber; 11. reserved pipe hole; 12. convex strip; 13. first casting cavity; 14. second casting cavity; 2. adjustment ring; 21. groove; 22. casting hole; 3. well ring; 4. pipe sleeve; 5. connector; 51. fixed plate; 52. steering component; 521. rotating plate; 522. torsion spring; 523. cylinder; 524. spiral protrusion; 525. gasket; 53. clamping component; 531. arc-shaped bent rod; 532. positioning shaft; 533. connecting rod; 534. clamping strip; 54. leakage hole; 6. fastener; 61. pressure cover; 611. annular groove; 612. alignment hole; 62. top pressure component; 621. column; 622. pressure pin; 623. guide groove; 624. pressure plate; 625. spring. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the 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.

[0037] See also Figure 1 , Figure 2 , Figure 3 and Figure 4 The present invention provides a technical solution: a combined prefabricated valve well, comprising an integrated well chamber 1, an adjustment ring 2 and a well ring 3 stacked in sequence from bottom to top, reserved pipe holes 11 are opened at both ends of the integrated well chamber 1 and a pipe sleeve 4 is sleeved at the reserved pipe hole 11, and a first casting cavity 13 and a second casting cavity 14 with a rectangular distribution are provided at the edge of the integrated well chamber 1, and the distribution mode of the first casting cavity 13 and the second casting cavity 14 can refer to Figure 4 and Figure 5 The first casting cavity 13 and the second casting cavity 14 are implanted with steel mesh in advance before prefabrication, connectors 5 are arranged at the four corners of the top surface of the integrated well chamber 1, and fasteners 6 corresponding to the connectors 5 are arranged at the four corners of the bottom surface of the adjustment ring 2.

[0038] See also Figure 6 and Figure 7The connector 5 includes a fixed disk 51, which is fixed on the integrated well chamber 1. A leakage hole 54 communicating with the adjacent first casting cavity 13 and the second casting cavity 14 is opened on the fixed disk 51. A casting hole 22 corresponding to the leakage hole 54 is opened through the adjusting ring 2. A steering component 52 capable of opening the leakage hole 54 in cooperation with the fastener 6 and a clamping component 53 driven by the steering component 52 to lock the fastener 6 are provided on the fixed disk 51. The steering component 52 includes a rotating disk 521. The middle part of the rotating disk 521 is rotatably connected to the fixed disk 51 through a rotating shaft and a torsion spring 522 is clamped at the connection. A cylinder 523 is fixed at the middle position of the top surface of the rotating disk 521. A spiral protrusion 524 is provided on the inner wall of the cylinder 523. Both sides of the bottom of the rotating disk 521 A sealing gasket 525 corresponding to the two leakage holes 54 is fixed, and the holding component 53 includes an arcuate curved rod 531, one end of the arcuate curved rod 531 is hinged to the fixed disk 51 through a positioning shaft 532, and a clamping strip 534 is fixed to the outer side surface of one end of the arcuate curved rod 531 away from the positioning shaft 532, and a connecting rod 533 is arranged between the rotating disk 521 and the arcuate curved rod 531, and the two ends of the connecting rod 533 are hinged to the rotating disk 521 and the arcuate curved rod 531 respectively. In the initial state, the rotating disk 521 is subjected to the elastic force of the torsion spring 522 so that the sealing gasket 525 is located above the leakage hole 54, and the leakage hole 54 is blocked to prevent the leakage hole 54 from being blocked by debris, and the two arcuate curved rods 531 are in a state of contraction toward the center of the fixed disk 51 under the pull of the connecting rod 533.

[0039] See also Figure 8 and Fig. 9 The fastener 6 includes a pressure cap 61, which is fixedly embedded in the bottom surface of the adjustment ring 2. A pressing component 62 for pressing the steering component 52 to drive the steering component 52 to rotate is slidably arranged in the pressure cap 61. An annular groove 611 capable of engaging with the card strip 534 is provided on the inner side of the bottom of the pressure cap 61. A positioning hole 612 penetrating the pouring hole 22 is provided on the top of the pressure cap 61. The pressing component 62 includes a column 621. A pressing pin 622 capable of contacting the spiral protrusion 524 when pressed down is fixedly penetrated at the bottom of the column 621. A pressure pin 622 capable of contacting the spiral protrusion 524 when pressed down is provided on the cylindrical surface of the column 621. The guide groove 623 of the column 621 is slidably matched, and a pressure plate 624 is fixed in the middle of the column 621. The pressure plate 624 is elastically connected to the pressure cover 61 through a spring 625. When the adjustment ring 2 is placed on the integrated well chamber 1, the pressure cover 61 is covered on the outside of the fixed plate 51, and the column 621 is inserted into the cylinder 523. The pressure pin 622 at the bottom of the column 621 presses the spiral protrusion 524 in the cylinder 523, so that the rotating plate 521 overcomes the elastic force of the torsion spring 522 and rotates clockwise, and then the arc-shaped bent rods 531 are pushed by the connecting rod 533 so that the two arc-shaped bent rods 531 press against the inner wall of the pressure cover 61.

[0040] See also Figure 2 and Figure 3The tops of both ends of the integrated well chamber 1 and the adjustment ring 2 are provided with convex strips 12, and the bottoms of both ends of the adjustment ring 2 and the well ring 3 are provided with grooves 21 adapted to the convex strips 12, so that the integrated well chamber 1 and the adjustment ring 2, and the adjustment ring 2 and the well ring 3 are embedded in each other up and down, so that the axes of the integrated well chamber 1, the adjustment ring 2 and the well ring 3 are consistent.

[0041] Based on the above combined prefabricated valve well, this embodiment also proposes a valve well construction method, including the following steps:

[0042] Step 1: hoist the integrated well chamber 1 into the valve well so that the axis of the reserved opening is consistent with the axis of the integrated well chamber 1;

[0043] Step 2: hoist the adjustment ring 2 on the integrated well chamber 1, so that the adjustment ring 2 is aligned with the axis of the integrated well chamber 1, the pressure cover 61 is covered on the outside of the fixed plate 51, and the steering component 52 rotates under the pressure of the top pressure component 62, and the rotating steering component 52 pushes the holding component 53 to lock the pressure cover 61, and at the same time, the rotation of the steering component 52 avoids the leakage hole 54, so that the casting hole 22 is connected with the leakage hole 54 from top to bottom;

[0044] Step 3: insert the pipe sleeve 4 into the reserved pipe hole 11 of the integrated well chamber 1, and then pour concrete into the first pouring cavity 13 and the second pouring cavity 14 through the pouring hole 22, and fix the pipe sleeve 4 in the reserved pipe hole 11 after the concrete in the second pouring cavity 14 solidifies;

[0045] Step 4: After the integrated well chamber 1 and the adjustment ring 2 are fixed together, the gap at the joint is treated with M10 waterproof cement slurry;

[0046] Step five, hoist the well ring 3 on the upper layer of the adjustment ring 2, and treat the fitting position between the well ring 3 and the adjustment ring 2 with M10 waterproof cement slurry.

[0047] The detailed process of the above step 2 is as follows: in the initial state, the rotating disk 521 is acted upon by the elastic force of the torsion spring 522 so that the sealing gasket 525 is located above the leak hole 54, thereby blocking the leak hole 54 to prevent debris from clogging the leak hole 54, and the two arc-shaped bent rods 531 are pulled toward the center of the fixed disk 51 by the connecting rod 533, thereby avoiding the cover 61 from being covered outside the fixed disk 51;

[0048] When the adjusting ring 2 is placed on the integrated well chamber 1, the pressure cover 61 is covered on the outside of the fixed plate 51, the column 621 is inserted into the cylinder 523, and the pressure pin 622 at the bottom of the column 621 presses the spiral protrusion 524 in the cylinder 523, so that the rotating plate 521 overcomes the elastic force of the torsion spring 522 and rotates clockwise, and then the connecting rod 533 pushes the arc-shaped curved rods 531 so that the two arc-shaped curved rods 531 press against the inner wall of the pressure cover 61. As the height of the adjusting ring 2 decreases, the spring 625 is gradually Compression, when the adjustment ring 2 is completely placed on the integrated well chamber 1, the height position of the annular groove 611 just drops to the height of the position of the clamping strip 534, and under the elastic force of the spring 625, the arc-shaped bent rod 531 is expanded outward, so that the clamping strip 534 is stuck in the annular groove 611. At the same time, due to the rotation of the rotating disk 521, the sealing gaskets 525 on both sides of the bottom of the rotating disk 521 can avoid the two leakage holes 54, so that the casting hole 22 and the leakage hole 54 are connected up and down.

[0049] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A combined prefabricated valve well, characterized in that: The invention comprises an integrated well chamber (1), an adjustment ring (2) and a well ring (3) stacked in sequence from bottom to top, wherein two ends of the integrated well chamber (1) are provided with reserved pipe holes (11) and the reserved pipe holes (11) are sleeved with pipe sleeves (4), the edges of the integrated well chamber (1) are provided with a first pouring cavity (13) and a second pouring cavity (14) distributed in a rectangular shape, connectors (5) are provided at the four corners of the top surface of the integrated well chamber (1), and fasteners (6) corresponding to the connectors (5) are provided at the four corners of the bottom surface of the adjustment ring (2); The connector (5) comprises a fixed plate (51), the fixed plate (51) being fixed on the integrated well chamber (1), the fixed plate (51) being provided with a leakage hole (54) communicating with the adjacent first casting cavity (13) and the second casting cavity (14), the adjusting ring (2) being provided with a casting hole (22) corresponding to the leakage hole (54), the fixed plate (51) being provided with a steering component (52) capable of opening the leakage hole (54) in cooperation with the fastener (6), and a clamping component (53) driven by the steering component (52) to lock the fastener (6); The fastener (6) comprises a pressure cover (61) which is fixedly embedded in the bottom surface of the adjustment ring (2), and a pressing component (62) is slidably arranged inside the pressure cover (61) for pressing the steering component (52) to drive the steering component (52) to rotate.

2. A combined prefabricated valve well according to claim 1, characterized in that: The steering component (52) comprises a rotating disk (521), the middle part of which is rotatably connected to the fixed disk (51) via a rotating shaft, and a torsion spring (522) is clamped at the connection point; a cylinder (523) is fixed at the middle position of the top surface of the rotating disk (521), and a spiral protrusion (524) is provided on the inner wall of the cylinder (523); and sealing pads (525) corresponding to the two leakage holes (54) are fixed on both sides of the bottom of the rotating disk (521).

3. A combined prefabricated valve well according to claim 2, characterized in that: The clamping component (53) comprises an arc-shaped curved rod (531), one end of which is hinged to the fixed disk (51) via a positioning shaft (532), a clamping strip (534) is fixed to the outer side surface of one end of the arc-shaped curved rod (531) away from the positioning shaft (532), a connecting rod (533) is provided between the rotating disk (521) and the arc-shaped curved rod (531), and two ends of the connecting rod (533) are respectively hinged to the rotating disk (521) and the arc-shaped curved rod (531).

4. A combined prefabricated valve well according to claim 3, characterized in that: An annular groove (611) capable of engaging with the clamping strip (534) is provided on the inner side of the bottom of the pressure cover (61), and an alignment hole (612) penetrating vertically with the casting hole (22) is provided on the top of the pressure cover (61).

5. The combined prefabricated valve well according to claim 4, characterized in that: The pressing component (62) includes a column (621), a pressing pin (622) is fixedly passed through the bottom of the column (621) and can contact the spiral protrusion (524) when pressed down, a guide groove (623) is opened on the cylindrical surface of the column (621) and is slidably matched with the pressure cover (61), and a pressure plate (624) is fixed in the middle of the column (621), and the pressure plate (624) is elastically connected to the pressure cover (61) through a spring (625).

6. The combined prefabricated valve well according to claim 1, characterized in that: The tops of both ends of the integrated well chamber (1) and the adjustment ring (2) are provided with convex strips (12), and the bottoms of both ends of the adjustment ring (2) and the well ring (3) are provided with grooves (21) that match the convex strips (12).

7. A method for constructing a valve well, according to the combined prefabricated valve well of claim 1, characterized in that: The following steps are involved: Step 1: hoist the integrated well chamber (1) into the valve well so that the axis of the reserved opening is consistent with the axis of the integrated well chamber (1); Step 2: hoist the adjustment ring (2) onto the integrated well chamber (1) so that the axis of the adjustment ring (2) is aligned with that of the integrated well chamber (1), the pressure cover (61) is covered on the outside of the fixed plate (51), the steering component (52) rotates under the pressure of the top pressure component (62), the rotating steering component (52) pushes the holding component (53) to lock the pressure cover (61), and at the same time, the rotation of the steering component (52) avoids the leakage hole (54), so that the casting hole (22) and the leakage hole (54) are connected up and down; Step 3: inserting a pipe sleeve (4) into the reserved pipe hole (11) of the integrated well chamber (1), and then pouring concrete into the first pouring cavity (13) and the second pouring cavity (14) through the pouring hole (22); after the concrete in the second pouring cavity (14) solidifies, the pipe sleeve (4) is fixed in the reserved pipe hole (11); Step 4: After the integrated well chamber (1) and the adjustment ring (2) are fixed together, the gap at the joint is treated with M10 waterproof cement slurry; Step 5: hoist the well ring (3) on the upper layer of the adjustment ring (2), and treat the fitting position between the well ring (3) and the adjustment ring (2) with M10 waterproof cement slurry.

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