Forward segmented quantitative rapid advanced water blocking grouting construction method and construction equipment used therein

Abstract

The invention discloses a forward segmented quantitative fast advanced water plugging grouting construction method, S1: the advanced exploration hole position is selected to be arranged in a triangle near the arch top and the arch waists on both sides, the drilling sequence is to drill the arch top first and then the arch waist one by one, and the drilling depth is drilled in three sections in principle, if there is no water or a small amount of water in the hole, it can be drilled to the designed hole depth of the exploration hole at one time; S2: grouting is performed in two stages according to the water-cement ratio of the slurry, and grouting is performed in the hole section by using construction equipment at the same time, when the water output in the hole is large, such as 300L / s-500L / s, 0.5:1 concentrated slurry can be directly used for quantitative grouting; S3: the first stage of grouting uses a grouting pipe to 0.5m from the bottom of the hole to form a hole circulation, and when leakage and slurry leakage occur in the excavation face, cement-water glass double liquid slurry is used to seal and form a slurry stop wall. The present invention uses three-stage drilling and two-stage grouting to simplify the water-blocking grouting process as much as possible, reduce the construction difficulty, and quickly deal with the leakage phenomenon. At the same time, the grouting effect can be verified and the water-blocking grouting amount can be controlled.

Description

Technical Field

[0001] The invention relates to a water plugging grouting construction method and construction equipment used therein, in particular to a forward segmented quantitative fast advanced water plugging grouting construction method and construction equipment used therein. Background Art

[0002] The construction process inevitably involves grouting procedures. How to improve the quality and efficiency of grouting operations during the grouting process has always been the focus of the industry.

[0003] The Chinese patent with the publication number CN108678375B discloses a grouting construction process using the GIN grouting method, including drilling holes to be grouted, cleaning holes to be grouted, surveying holes to be grouted, evenly dividing the grouting section into several grouting sub-sections according to the survey results, installing a grouting construction control system, grouting the holes to be grouted through the grouting construction system, and controlling the grouting pressure. After each grouting time threshold, a grouting pressure increment is added to the original grouting pressure and grouting is continued. When the grouting pressure reaches the preset grouting pressure threshold, the grouting ends. In the technical solution of the invention, a computer is used to control the grouting strength value GIN of each grouting sub-section, so that the grouting strength value GIN of the entire hole to be grouted during the grouting process remains constant, so that the grouting flow rate and the grouting pressure are always matched, improving the quality of grouting construction work, and having the advantages of simple construction process, high operation efficiency, and good anti-seepage effect.

[0004] During the implementation of this technical solution, it was found that this method is difficult to construct, the procedure is complicated, and the processing is not fast enough. The learning cost for workers is high and it is not suitable for promotion. Summary of the invention

[0005] The purpose of the present invention is to provide a forward segmented quantitative rapid advance water plugging grouting construction method and the construction equipment used therein. The use of this method and the construction equipment can simplify the water plugging grouting process, and has the construction characteristics of reducing construction difficulty, rapid disposal, verifiable grouting effect, and controllable water plugging grouting amount.

[0006] The technical solution of the present invention: a forward segmented quantitative rapid advanced water plugging grouting construction method, comprising the following steps:

[0007] S1: The advance exploration holes are located near the arch top and the waists on both sides in a triangular arrangement, with an external insertion angle ranging from 3 to 5 degrees. The drilling sequence is to drill the arch top first and then the waists one by one. In principle, the drilling depth is divided into three sections. If there is no water or a small amount of water in the hole, the exploration hole can be drilled to the designed hole depth at one time. The maximum hole section length is controlled to be ≤10m;

[0008] S2: Grouting is carried out in two stages with a water-cement ratio of 1:1 and 0.5:1. At the same time, construction equipment is used to grout the hole section. When the water output in the hole is large, 300L / s~500L / s, 0.5:1 thick slurry can be directly used for quantitative grouting. When the depth of the first section of the borehole is less than 5m, the grouting pressure is 0.3MPa to 0.5Mpa. When the water outlet point is greater than 5m in depth, the grouting pressure can be 0.5MPa to 1.0MPa. The second section is controlled at 0.5MPa to 1.0MPa or the final grouting pressure is 1.5 to 2 times the external water pressure of the actual grouting section.

[0009] S3: The first stage of grouting uses a grouting pipe to 0.5m from the bottom of the hole and forms a circulation in the hole. When leakage or slurry leakage occurs on the excavation face, cement-water glass double liquid slurry is used to seal and form a slurry stop wall.

[0010] The construction equipment used in the forward segmented quantitative fast advanced water plugging grouting construction method includes a grouting machine that is higher than the grouting machine. The discharge end of the high-pressure grouting machine is fixedly sleeved with a grouting pipe, and the outside of the grouting pipe is fixedly sleeved with a protective tube. Multiple groups of connecting tubes are symmetrically fixedly arranged on the top and bottom of the protective tube. A "U"-shaped connecting rod is slidably inserted on each group of connecting tubes, and a rotating tube is rotatably connected to the "U"-shaped connecting rod, and an elastic part is fixedly connected inside the connecting tube.

[0011] In the construction equipment used for the aforementioned forward segmented quantitative rapid advance water plugging grouting construction method, the elastic part is an air bag filled with lubricating liquid, and a guide groove connected to the elastic part is provided on the "U"-shaped connecting rod, and the outer end of the guide groove extends toward the connection between the rotating drum and the "U"-shaped connecting rod.

[0012] In the construction equipment used in the aforementioned forward segmented quantitative fast advanced water plugging grouting construction method, an annular connecting frame is fixedly connected to the "U"-shaped connecting rod, and bristles are fixedly connected to the side of the annular connecting frame facing the rotating drum.

[0013] In the construction equipment used for the aforementioned forward segmented quantitative rapid advance water plugging grouting construction method, a blocking duct is fixedly connected inside the protective cylinder, the blocking duct is connected to the high-pressure injection machine, an extrusion airbag is fixedly installed on the outside of the protective cylinder, the extrusion airbag is located below the rotating cylinder, an air intake pipe and an air outlet pipe connected to the extrusion airbag 10 are installed through the protective cylinder, the air intake pipe and the blocking duct are connected to each other, a one-way valve is fixedly connected inside the air intake pipe, and a one-way component is fixedly connected inside the air outlet pipe.

[0014] In the construction equipment used for the aforementioned forward segmented quantitative rapid advance water blocking grouting construction method, the one-way component includes a connecting ring, which is fixedly connected in the air outlet pipe, and an elastic rope is fixedly connected to the connecting ring. The other end of the elastic rope is fixedly connected to a blocking ball, and the blocking ball is placed above the connecting ring.

[0015] In the construction equipment used in the aforementioned forward segmented quantitative fast advanced water plugging grouting construction method, the end of the protective tube away from the grouting machine is fixedly connected to a baffle, and both sides of the baffle are rotatably connected to connecting plates.

[0016] In the construction equipment used for the aforementioned forward segmented quantitative rapid advance water plugging grouting construction method, a discharge trough is opened at the position of the baffle corresponding to the grouting pipe and the plugging pipe, and extrusion plates are symmetrically fixedly connected in the discharge trough, one of the extrusion plates is rotatably connected to a rotating plate, the bottom of the rotating plate is fixedly connected to a connecting pipe, and the rotating plate is fixedly connected to the extrusion plate through the connecting pipe.

[0017] In the construction equipment used for the aforementioned forward segmented quantitative rapid advance water plugging grouting construction method, an air blowing bag is fixedly connected to one side of the extrusion plate, the air blowing bag is fixedly connected in the discharge trough, the connecting pipe and the air blowing bag are interconnected, and a conduit interconnected with the air blowing bag is installed through another extrusion plate, and an air outlet groove is opened on the rotating plate, and the air outlet groove 22) is interconnected with the connecting pipe and the conduit.

[0018] In the construction equipment used in the aforementioned forward segmented quantitative fast advanced water plugging grouting construction method, one end of the connecting plate is in contact with the blowing airbag.

[0019] Beneficial effects of the invention: Compared with the prior art, the invention has the following advantages:

[0020] 1. In the construction method of the present invention, three-stage drilling is used in conjunction with two-stage grouting, so that the water-blocking grouting process is simplified as much as possible, the construction difficulty is reduced, and the leakage phenomenon can be quickly dealt with. At the same time, the grouting effect can be verified, and the water-blocking grouting amount can be controlled.

[0021] 2. The construction equipment of the present invention utilizes a rotating drum, which allows the grouting pipe to enter the hole section better, reduces the friction between the grouting pipe and the hole section, extends the service life of the grouting pipe, and also allows the grouting pipe to enter the hole section more conveniently.

[0022] In summary, the construction method and construction equipment of the present invention can simplify the water plugging grouting process, and have the construction characteristics of reducing construction difficulty, rapid disposal, verifiable grouting effect, and controllable water plugging grouting amount. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a flow chart of the construction method of the present invention;

[0024] Figure 2 It is a schematic diagram of the structure of the present invention;

[0025] Figure 3 It is a three-dimensional diagram of the protective tube in the present invention;

[0026] Figure 4 It is a schematic diagram of the front structure of the baffle in the present invention;

[0027] Figure 5 The present invention Figure 2 Enlarged view of point A in the middle;

[0028] Figure 6 The present invention Figure 5 Enlarged view of point B in the middle;

[0029] Figure 7 The present invention Figure 2 Enlarged view of point C in the middle;

[0030] Figure 8 It is a structural schematic diagram of the connecting plate of the present invention.

[0031] In the figure: 1. high-pressure grouting machine; 2. grouting pipe; 3. protection tube; 4. connecting tube; 5. "U"-shaped connecting rod; 6. rotating drum; 7. elastic member; 8. guide groove; 9. annular connecting frame; 10. extrusion airbag; 11. suction pipe; 12. outlet pipe; 13. connecting ring; 14. blocking ball; 15. elastic rope; 16. blocking duct; 17. baffle; 18. discharge trough; 19. rotating plate; 20. connecting pipe; 21. blowing airbag; 22. outlet groove; 23. connecting plate; 24. extrusion plate; 25. duct. DETAILED DESCRIPTION

[0032] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0033] Embodiments of the present invention: Figure 1 As shown, the forward segmented quantitative rapid advanced water plugging grouting construction method includes the following steps:

[0034] S1: The advance exploration holes are located near the arch top and the waists on both sides in a triangular arrangement, with an external insertion angle ranging from 3 to 5 degrees. The drilling sequence is to drill the arch top first and then the waists one by one. In principle, the drilling depth can be divided into three sections. If there is no water or a small amount of water in the hole, the exploration hole can be drilled to the designed hole depth at one time. The maximum hole section length is controlled to be no more than 10m;

[0035] S2: Grouting is carried out in two stages with a water-cement ratio of 1:1 and 0.5:1. At the same time, construction equipment is used to grout the hole section. When the water output in the hole is large, 300L / s~500L / s, 0.5:1 thick slurry can be directly used for quantitative grouting. When the depth of the first section of the borehole is less than 5m, the grouting pressure is 0.3MPa to 0.5Mpa. When the water outlet point is greater than 5m in depth, the grouting pressure can be 0.5MPa to 1.0MPa. The second section is controlled at 0.5MPa to 1.0MPa or the final grouting pressure is 1.5 to 2 times the external water pressure of the actual grouting section.

[0036] S3: The first stage of grouting uses a grouting pipe to 0.5m from the bottom of the hole and forms an in-hole circulation. When leakage or slurry leakage occurs on the excavation face, cement-water glass double slurry is used to seal and form a slurry stop wall. The forward segmented quantitative rapid water plugging grouting construction method of the present invention is based on existing engineering experience, with advanced water plugging effect as the leading factor, and in accordance with the construction principle of "plugging as the main, limited discharge, rapid plugging, and risk reduction", the water plugging grouting process is simplified as much as possible, and has the construction characteristics of reducing construction difficulty, rapid disposal, verifiable grouting effect, and controllable water plugging grouting volume.

[0037] The construction equipment used in the forward segmented quantitative rapid advance water plugging grouting construction method is as follows: Figures 2 to 8 As shown, the construction equipment includes a high-pressure grouting machine 1, a grouting pipe 2 is fixedly sleeved on the discharge end of the high-pressure grouting machine 1, a protective tube 3 is fixedly sleeved at the end of the grouting pipe 2, a plurality of groups of connecting tubes 4 are symmetrically fixedly connected to the protective tube 3, a "U"-shaped connecting rod 5 is slidably inserted on each group of connecting tubes 4, a rotating tube 6 is rotatably connected to the "U"-shaped connecting rod 5, and an elastic member 7 is fixedly connected inside the connecting tube 4.

[0038] When grouting is being performed, the rotating drum 6 on the protective cylinder 3 is used to roll with the hole section to bring the grouting pipe 2 to 0.5m from the bottom of the hole section, and the high-pressure grouting machine 1 is started for grouting. The rotating drum 6 can allow the grouting pipe 2 to better enter the hole section, reduce the friction between the grouting pipe 2 and the hole section, extend the service life of the grouting pipe 2, and also allow the grouting pipe 2 to enter the hole section more conveniently. The setting of the elastic member 7 can enable the rotating drum 6 to move more smoothly in the uneven hole section, and can maintain the stable movement state of the rotating drum 6.

[0039] like Figure 5As shown, the elastic member 7 is an air bag, and lubricating liquid is contained in the elastic member 7. A guide groove 8 connected to the elastic member 7 is provided on the "U"-shaped connecting rod 5, and the outer end of the guide groove 8 extends to the connection between the rotating drum 6 and the "U"-shaped connecting rod 5. Since there will be dust in the hole section, in order to maintain the rotation effect between the rotating drum 6 and the "U"-shaped connecting rod 5, when the rotating drum 6 moves in the uneven hole section, the rotating drum 6 will drive the "U"-shaped connecting rod 5 to squeeze into the connecting cylinder 4, and squeeze the lubricating liquid in the elastic member 7 from the guide groove 8, so that the connection between the rotating drum 6 and the "U"-shaped connecting rod 5 is lubricated, ensuring the rolling effect of the rotating drum 6 in the hole section.

[0040] like Figure 5 As shown, the "U"-shaped connecting rod 5 is fixedly connected with an annular connecting frame 9, and the side of the annular connecting frame 9 facing the rotating drum 6 is fixedly connected with bristles. In order to prevent larger sand and stones from entering between the "U"-shaped connecting rod 5 and the rotating drum 6, the annular connecting frame 9 can block this part of the sand or stones, and cooperate with the lubricating oil squeezed out of the guide groove 8. When the rotating drum 6 rotates, the lubricating oil will be evenly spread to improve the lubrication effect.

[0041] like Figure 3 and Figure 5 As shown, a blocking catheter 16 is fixedly connected inside the protective cylinder 3, and the blocking catheter 16 is communicated with the high-pressure perfusion machine 1. An extrusion airbag 10 is fixedly installed on the outside of the protective cylinder 3, and the extrusion airbag 10 is located below the rotating cylinder 6. An intake pipe 11 and an exhaust pipe 12 connected to the extrusion airbag 10 are installed through the protective cylinder 3. The intake pipe 11 and the blocking catheter 16 are communicated with each other. A one-way valve is fixedly connected inside the intake pipe 11, and a one-way component is fixedly connected inside the exhaust pipe 12. When the rotating drum 6 moves in the uneven hole section, it will produce an up and down squeezing effect on the squeezing airbag 10. When the squeezing airbag 10 is squeezed, the air is exhausted outwardly through the exhaust pipe 12. When the squeezing airbag 10 loses the squeezing and restores its shape, it inhales air inwardly through the suction pipe 11, thereby generating negative pressure in the blocking conduit 16, and sucking the cement-water glass double slurry in the high-pressure perfusion machine 1 into the blocking conduit 16. In this way, when the cement-water glass double slurry is needed for blocking, the high-pressure perfusion machine 1 can quickly discharge the cement-water glass double slurry as soon as it is started, thereby achieving a faster blocking speed and better blocking the hole section.

[0042] like Figure 6As shown, the one-way assembly includes a connecting ring 13, which is fixedly connected to the air outlet pipe 12, and an elastic rope 15 is fixedly connected to the connecting ring 13, and one end of the elastic rope 15 is fixedly connected to a blocking ball 14, and the blocking ball 14 is placed above the connecting ring 13. When the air is exhausted outward through the air outlet pipe 12, the blocking ball 14 will be lifted up, and the airflow will pass through the position of the connecting ring 13 and be discharged outward. When the airbag 10 is squeezed to inhale, the blocking ball 14 will fit with the connecting ring 13, blocking the pipe opening of the air outlet pipe 12, preventing air from being inhaled from the air outlet pipe 12, and the connecting ring 13 can prevent dust or stones from entering the air outlet pipe 12.

[0043] like Figure 4 and Figure 6 As shown, one end of the protection tube 3 is fixedly connected with a baffle 17, and both sides of the baffle 17 are rotatably connected with connecting plates 23. When the protection tube 3 moves in the hole section, the baffle 17 can block stones to prevent the stones from entering the grouting pipe 2 or the plugging conduit 16, and the connecting plates 23 that can rotate on both sides can reduce the obstacles to the movement of the protection tube 3 caused by the unevenness of the two sides of the hole section, so that the protection tube 3 can smoothly pass through the hole section with a smaller diameter.

[0044] like Figure 4 As shown, the baffle 17 is provided with a discharge trough 18 at the position corresponding to the grouting pipe 2 and the plugging conduit 16, and an extrusion plate 24 is symmetrically fixedly connected in the discharge trough 18, one of the extrusion plates 24 is rotatably connected to a rotating plate 19, and a connecting pipe 20 is fixedly connected to the bottom of the rotating plate 19, and the rotating plate 19 is fixedly connected to the extrusion plate 24 through the connecting pipe 20. During the movement of the protective tube 3, debris such as stones or gravel will be blocked by the discharge trough 18, and when the grouting pipe 2 or the plugging conduit 16 is grouting outward, the pressure will push open the rotating plate 19, causing the rotating plate 19 to rotate, and the connecting pipe 20 will be stretched, so that the discharge trough 18 is opened, which can ensure the grouting effect of the grouting pipe 2 or the plugging conduit 16.

[0045] like Figure 4 As shown, a blowing airbag 21 is fixedly connected to one side of the extrusion plate 24, and the blowing airbag 21 is fixedly connected to the discharge trough 18, and the connecting pipe 20 is connected to the blowing airbag 21. A conduit 25 connected to the blowing airbag 21 is installed through the other extrusion plate 24, and an air outlet groove 22 is provided on the rotating plate 19, and the air outlet groove 22 is connected to the connecting pipe 20 and the conduit 25. When the stone hits the rotating plate 19, the extrusion plate 24 will squeeze the blowing airbag 21, and the blowing airbag 21 will exhaust air outward through the conduit 25 and the connecting pipe 20 when being squeezed, and the stone that hits and stays in the discharge trough 18 will be blown away through the air outlet groove 22 on the rotating plate 19, reducing the probability of the stone blocking the discharge trough 18, and ensuring the grouting effect of the grouting pipe 2 or the blocking conduit 16.

[0046] One end of the connecting plate 23 is in contact with the blowing airbag 21. When the connecting plate 23 encounters an uneven or reduced diameter hole section, it will rotate and squeeze the blowing airbag 21 during the rotation, causing the blowing airbag 21 to exhaust air outwards, so that the small stones scraped off by the connecting plate 23 due to friction will be affected by the airflow ejected by the blowing airbag 21, and it is difficult to enter the discharge trough 18, thereby reducing the blockage of stones.

Claims

1. The forward segmented quantitative rapid advance water plugging grouting construction method is characterized by: The following steps are included: S1: The advance exploration holes are located near the arch and on both sides of the arch waist in a triangular layout, with an external insertion angle range of 3 to 5 degrees. The drilling sequence is to drill the arch first and then the arch waist. The drilling depth is generally divided into three sections. If there is no water or a small amount of water in the hole, the exploration hole can be drilled to the designed hole depth at one time. The maximum hole section length is controlled to be ≤10m; S2: Grouting is carried out in two stages with a water-cement ratio of 1:1 and 0.5:

1. At the same time, construction equipment is used to grout the hole section. When the water output in the hole is large, 300L / s~500L / s, 0.5:1 thick slurry is directly used for quantitative grouting. When the depth of the first section of the borehole is less than 5m, the grouting pressure is 0.3MPa to 0.5Mpa. When the water outlet point is greater than 5m in depth, the grouting pressure is 0.5MPa to 1.0MPa. The second section is controlled at 0.5MPa to 1.0MPa or the final grouting pressure is 1.5 to 2 times the external water pressure of the actual grouting section. S3: The first stage of grouting uses a grouting pipe to 0.5m from the bottom of the hole and forms a hole circulation. When leakage or slurry leakage occurs at the excavation face, cement-water glass double liquid slurry is used to seal and form a slurry stop wall; The construction equipment comprises a high-pressure grouting machine (1), a grouting pipe (2) is fixedly sleeved at the discharge end of the high-pressure grouting machine (1), a protective tube (3) is fixedly sleeved on the outside of the grouting pipe (2), a plurality of groups of connecting tubes (4) are symmetrically fixedly arranged on the top and bottom of the protective tube (3), a "U"-shaped connecting rod (5) is slidably inserted on each group of connecting tubes (4), a rotating tube (6) is rotatably connected to the "U"-shaped connecting rod (5), and an elastic member (7) is fixedly connected inside the connecting tube (4).

2. The forward segmented quantitative rapid advanced water plugging grouting construction method according to claim 1 is characterized by: The elastic member (7) is an air bag, and lubricating liquid is contained in the elastic member (7). A guide groove (8) connected to the elastic member (7) is provided on the U-shaped connecting rod (5), and the outer end of the guide groove (8) extends toward the connection between the rotating drum (6) and the U-shaped connecting rod (5).

3. The forward segmented quantitative rapid advanced water plugging grouting construction method according to claim 2 is characterized by: The "U"-shaped connecting rod (5) is fixedly connected to an annular connecting frame (9), and the annular connecting frame (9) is fixedly connected to bristles on one side facing the rotating drum (6).

4. The forward segmented quantitative rapid advanced water plugging grouting construction method according to claim 1 is characterized by: A blocking conduit (16) is fixedly connected inside the protective cylinder (3), the blocking conduit (16) is in communication with the high-pressure injection machine (1), an extrusion airbag (10) is fixedly installed outside the protective cylinder (3), the extrusion airbag (10) is located below the rotating cylinder (6), an air intake pipe (11) and an air outlet pipe (12) in communication with the extrusion airbag (10) are installed through the protective cylinder (3), the air intake pipe (11) and the blocking conduit (16) are in communication with each other, a one-way valve is fixedly connected inside the air intake pipe (11), and a one-way component is fixedly connected inside the air outlet pipe (12).

5. The forward segmented quantitative rapid advanced water plugging grouting construction method according to claim 4 is characterized by: The one-way component comprises a connecting ring (13), the connecting ring (13) is fixedly connected in the air outlet pipe (12), an elastic rope (15) is fixedly connected to the connecting ring (13), the other end of the elastic rope (15) is fixedly connected to a blocking ball (14), and the blocking ball (14) is placed above the connecting ring (13).

6. The forward segmented quantitative rapid advanced water plugging grouting construction method according to claim 4 is characterized by: One end of the protection tube (3) away from the high-pressure injection machine (1) is fixedly connected to a baffle (17), and both sides of the baffle (17) are rotatably connected to connecting plates (23).

7. The forward segmented quantitative rapid advanced water plugging grouting construction method according to claim 6 is characterized by: The baffle plate (17) is provided with a discharge trough (18) at a position corresponding to the grouting pipe (2) and the plugging conduit (16), and extrusion plates (24) are symmetrically fixedly connected in the discharge trough (18), one of the extrusion plates (24) is rotatably connected to a rotating plate (19), a connecting pipe (20) is fixedly connected to the bottom of the rotating plate (19), and the rotating plate (19) is fixedly connected to the extrusion plate (24) via the connecting pipe (20).

8. The forward segmented quantitative rapid advanced water plugging grouting construction method according to claim 7 is characterized by: A blowing airbag (21) is fixedly connected to one side of the extrusion plate (24), the blowing airbag (21) is fixedly connected to the discharge trough (18), the connecting pipe (20) and the blowing airbag (21) are communicated with each other, a conduit (25) which is communicated with the blowing airbag (21) is installed through the other extrusion plate (24), and an air outlet groove (22) is opened on the rotating plate (19), and the air outlet groove (22) is communicated with the connecting pipe (20) and the conduit (25).

9. The forward segmented quantitative rapid advanced water plugging grouting construction method according to claim 8 is characterized by: One end of the connecting plate (23) is in contact with the blowing airbag (21).

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