A multi-layer segmental grouting construction method

Abstract

The application relates to a multilayer segmental grouting construction method, which comprises the following steps: S1, preparation, determining a region needing treatment and a problem severity, and cleaning a working region to prepare construction; S2, dividing the region needing treatment into multiple pouring zones along a vertical direction; S3, drilling, vertically drilling multiple pouring holes in the region needing treatment; S4, grouting, layer-by-layer grouting into the pouring holes; S5, placing a connecting pile, inserting a connecting pile with an outer diameter smaller than a drilling hole diameter into the grouting in the pouring hole; S6, waiting for solidification; and S7, sequentially pouring other layers, waiting for complete solidification of the last grouting, and the application has the effect of improving the overall grouting integrity.

Description

Technical Field

[0001] This application relates to the technical field of grouting reinforcement, and in particular to a multi-layer segmented grouting construction method. Background Technology

[0002] Multi-segment grouting is a reinforcement and repair method for problems in concrete structures or other buildings; it involves dividing the structure into multiple parts, usually horizontal or vertical areas, and then grouting these parts in stages.

[0003] Existing multi-layer segmented grouting methods include the following steps: preparation, cleaning the work area in preparation for construction; segmentation, dividing the area to be grouted into multiple parts according to design requirements; drilling holes to facilitate the pouring of grouting material; grouting; waiting for curing and repeating the process. When multi-layered grouting is required, ensure that the previous grouting has cured before the next grouting.

[0004] Regarding the aforementioned technologies, when pouring grout in multiple vertical segments, the next pouring can only proceed after the previous grouting has completely cured. As a result, the overall integrity between the multiple grouting layers is poor, resulting in a defect of poor grouting integrity. Summary of the Invention

[0005] To address the issue of poor overall integrity in grouting, this application provides a multi-layer segmented grouting construction method.

[0006] This application provides a multi-layer segmented grouting construction method, which adopts the following technical solution: S1. Preparation work, determining the area to be treated and the severity of the problem, and cleaning the work area to prepare for construction;

[0007] S2. Divide the area to be treated vertically into multiple pouring zones;

[0008] S3. Drilling: Drill multiple pouring holes vertically in the area to be treated;

[0009] S4. Grouting: Grouting is performed in layers into the casting hole;

[0010] S5. Place the connecting piles, inserting the connecting piles with an outer diameter smaller than the borehole diameter into the grouting inside the casting hole;

[0011] S6. Wait for curing;

[0012] S7, the other layers are poured in sequence, and the previous grouting is completely cured.

[0013] By adopting the above technical solution, when performing multi-layer segmented grouting, after the first layer of grouting, the connecting piles are inserted into the grout; after the first layer of grouting has solidified, the other layers are poured in sequence; the setting of connecting piles improves the integrity of grouting after layered pouring.

[0014] Preferably, the pile connection includes a pile pipe and a grouting body, with the grouting body located inside the pile pipe; the pile pipe includes a pull-out tube and a throat tube; the pull-out tube and the throat tube are coaxially fixedly connected and communicate with each other; the diameter of the throat tube is smaller than the diameter of the pull-out tube; each vertically divided pouring zone corresponds to a section of the throat tube; the bottom end of the pile pipe is closed.

[0015] By adopting the above technical solution, after the pile pipe is inserted into the first layer of grouting, the outer diameter of the pull-out pipe is larger than the outer diameter of the throat pipe. Therefore, the setting of the pull-out pipe and the throat pipe improves the pull-out and settlement resistance of the pile, improves the connection stability between the pile and the grouting, and improves the overall integrity of the grouting.

[0016] Preferably, the grouting body includes an inner mold cylinder and a support rod; the inner mold cylinder is a tubular structure with a closed top, and the support rod is vertically fixed to the outer wall of the top of the inner mold cylinder; and the outer diameter of the inner mold cylinder is smaller than the inner diameter of the throat; the end of the support rod away from the inner mold cylinder abuts against the throat; multiple inner mold cylinders are pressed together in sequence.

[0017] By adopting the above technical solution, the setting of the inner mold cylinder and the support rod can facilitate the workers to first pour the gap between the inner mold cylinder and the pile pipe in layers to improve the deformation resistance of the pile pipe; at the same time, the inner mold cylinders are pressed together in sequence, and the grouting of the gap between the inner mold cylinders can improve the integrity of the grouting body and thus improve the integrity of the pile connection.

[0018] Preferably, in step S5, after grouting into the space between the connecting pile and the pouring hole, an inner mold is placed inside the pile pipe, and grout is injected between the outer wall of the inner mold and the pull-out pipe until the grout covers the support rod.

[0019] By adopting the above technical solution, the setting of the inner mold cylinder and the support rod can realize the grouting of the gap between the inner mold cylinder and the pile pipe first. The grouting of the gap between the inner mold cylinder and the pile pipe first can reduce the impact of the grouting between the pile pipe and the pouring hole on the pile pipe. When the upper layer is grouted, the grouting between the lower inner mold cylinder and the pile pipe has been solidified, thereby improving the deformation resistance of the pile pipe.

[0020] Preferably, a filling bladder is provided outside the throat at the very end of the pile tube; the filling bladder is sleeved outside the throat tube, and the outer diameter of the filling bladder after inflation is coplanar with the outer diameter of the pull-out tube; the throat tube has a through hole; the filling bladder is connected to a deflation bladder tube, the deflation bladder tube communicates with the filling bladder, and the deflation bladder tube passes through the through hole and is inserted into the throat tube; a cutting ring is provided at the bottom end of the inner mold cylinder, the cutting ring is used to cut the deflation bladder tube.

[0021] By adopting the above technical solution, before inserting the pile pipe into the first layer of uncured grout, the filling bladder is placed outside the throat pipe, the venting bladder is inserted into the through hole, and inflated so that the outer wall of the filling bladder is coplanar with the outer wall of the pull-out tube; when lowering the inner mold cylinder, the cutting ring can easily cut off the venting bladder, and the gas in the filling bladder and venting bladder is discharged under the grouting pressure; the setting of the filling bladder reduces the resistance of grouting to the pile pipe when the pile is inserted.

[0022] Preferably, in step S5, after grouting into the space between the connecting pile and the casting hole, before inserting the pile pipe into the casting hole, the air venting tube is inserted into the through hole, the filling bladder is placed outside the throat tube and inflated; after the pile pipe reaches the preset position, an inner mold cylinder with a cutting ring at the bottom is placed into the pile pipe, and the cutting ring cuts the air venting tube.

[0023] Preferably, in step S7, after the gap between the pile pipe and the pouring hole is grouted layer by layer, and the gap between the inner mold cylinder and the inner wall of the pile pipe is grouted layer by layer, a hole is drilled at the top of the inner mold cylinder, and the diameter of the hole is the same as the inner diameter of the inner mold cylinder; grouting is poured into multiple inner mold cylinders in a single overall process.

[0024] By adopting the above technical solution, after multi-layer grouting is carried out between the inner mold cylinder and the pile pipe, the top of the inner mold cylinder is drilled and then the grouting is poured as a whole, which improves the integrity of the grouting body and thus improves the integrity of the pile connection; the borehole diameter is the same as the inner diameter of the inner mold cylinder, which increases the integrity and diameter of the post-cast body.

[0025] Preferably, the inner mold cylinder is made of polyvinyl chloride.

[0026] By adopting the above technical solution, the inner mold cylinder made of polyvinyl chloride has a certain hardness to resist the pressure formed during the grouting and curing process between the inner mold cylinder and the pile pipe. At the same time, the inner mold cylinder made of polyvinyl chloride can facilitate workers to drill holes at the top of the inner mold cylinder.

[0027] In summary, this application includes at least one of the following beneficial technical effects:

[0028] 1. When performing multi-layer segmented grouting, after the first layer of grouting, the connecting piles are inserted into the grout; after the first layer of grouting has solidified, the other layers are poured in sequence; the setting of connecting piles improves the integrity of the grouting after layered pouring.

[0029] 2. Before inserting the pile pipe into the first layer of uncured grout, the filling bladder is placed outside the throat pipe, and the venting bladder tube is inserted into the through hole and inflated so that the outer wall of the filling bladder is coplanar with the outer wall of the pull-out tube; when lowering the inner mold cylinder, the cutting ring can easily cut off the venting bladder tube, and the gas in the filling bladder and venting bladder tube is discharged under the grouting pressure; the setting of the filling bladder reduces the resistance of grouting to the pile pipe during pile driving;

[0030] 3. The inner mold cylinder made of polyvinyl chloride has a certain hardness to resist the pressure formed during the grouting and curing process between the inner mold cylinder and the pile pipe. At the same time, the inner mold cylinder made of polyvinyl chloride makes it easy for workers to drill holes at the top of the inner mold cylinder. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0032] Figure 2 yes Figure 1 A magnified view of part A in the middle;

[0033] Figure 3 yes Figure 1 A magnified view of part B in the diagram.

[0034] In the diagram, 1 is the pouring hole; 2 is the connecting pile; 21 is the pile pipe; 211 is the pull-out pipe; 212 is the throat pipe; 22 is the grouting body; 221 is the inner mold cylinder; 222 is the support rod; 3 is the filling bladder; 31 is the venting bladder pipe; 4 is the through hole; and 5 is the cutting ring. Detailed Implementation

[0035] The following is in conjunction with the appendix Figures 1-3 This application will be described in further detail.

[0036] This application discloses a multi-layer segmented grouting construction method.

[0037] refer to Figure 1 The multi-layer segmented grouting construction method includes the following steps: S1, preparation work, determining the area to be treated and the severity of the problem, and cleaning the work area in preparation for construction;

[0038] S2. Divide the area to be treated vertically into multiple pouring zones;

[0039] S3. Drilling: Drill multiple casting holes 1 vertically in the area to be treated;

[0040] S4. Grouting: Grout in layers into casting hole 1;

[0041] S5. Place the connecting pile 2, inserting the connecting pile 2, whose outer diameter is smaller than the borehole diameter, into the grouting inside the casting hole 1.

[0042] S6. Wait for curing;

[0043] S7, the other layers are poured in sequence, and the previous grouting is completely cured.

[0044] When performing multi-layer segmented grouting, after the first layer of grouting, the connecting pile 2 is inserted into the grout; after the first layer of grouting has solidified, the other layers are poured in sequence; the setting of the connecting pile 2 improves the integrity of the grouting after layered pouring.

[0045] refer to Figure 1 and Figure 2 In this embodiment, the connecting pile 2 includes a pile pipe 21 and a grouting body 22, with the grouting body 22 located inside the pile pipe 21. The pile pipe 21 includes a pull-out tube 211 and a throat tube 212, which are coaxially fixedly connected and communicate with each other. The diameter of the throat tube 212 is smaller than the diameter of the pull-out tube 211. Each of the vertically divided multi-layered pouring zones corresponds to a section of the throat tube 212. Multiple sections of the throat tube 212 and the pull-out tube 211 are connected to form a pile pipe 21 with a closed bottom. The grouting body 22 includes an inner mold cylinder 221 and a support rod 222. The inner mold cylinder 221 is a tubular structure with a closed top. In this embodiment, the inner mold cylinder 221 is made of polyvinyl chloride. The support rod 222 is vertically fixed to the outer wall of the top circumference of the inner mold cylinder 221. The outer diameter of the inner mold cylinder 221 is smaller than the inner diameter of the throat 212. The end of the support rod 222 away from the inner mold cylinder 221 abuts against the throat 212. Multiple inner mold cylinders 221 are pressed together in sequence.

[0046] refer to Figure 2 and Figure 3 A filling bladder 3 is provided outside the throat 212 at the very end of the pile pipe 21. The filling bladder 3 is sleeved outside the throat 212, and the outer diameter of the filling bladder 3 after inflation is coplanar with the outer diameter of the pull-out tube 211. The throat 212 has a through hole 4. The filling bladder 3 is connected to a deflation bladder tube 31. The deflation bladder tube 31 is connected to the filling bladder 3, and the deflation bladder tube 31 passes through the through hole 4 and is inserted into the throat 212. A cutting ring 5 is provided at the bottom of the inner mold cylinder 221. The cutting ring 5 is used to cut the deflation bladder tube 31.

[0047] Before inserting the pile pipe 21 into the first layer of uncured grout, the filling bladder 3 is fitted over the throat 212, and the venting bladder 31 is inserted into the through hole 4 and inflated so that the outer wall of the filling bladder 3 is coplanar with the outer wall of the pull-out tube 211. When the inner mold cylinder 221 is lowered, the cutting ring 5 can easily cut the venting bladder 31, and the gas in the filling bladder 3 and the venting bladder 31 is discharged under the grouting pressure. The setting of the filling bladder 3 reduces the resistance of the grouting to the pile pipe 21 when the pile 2 is inserted. After the pile pipe 21 is inserted into the first layer of grout, since the outer diameter of the pull-out tube 211 is larger than the outer diameter of the throat 212, the setting of the pull-out tube 211 and the throat 212 improves the pull-out and settlement resistance of the pile 2, improves the connection stability with the poured grout, and improves the overall integrity of the grouting.

[0048] The inner mold cylinder 221 and the support rod 222 are designed to facilitate workers to first pour the gap between the inner mold cylinder 221 and the pile pipe 21 in layers to improve the deformation resistance of the pile pipe 21; at the same time, the inner mold cylinders 221 are pressed together in sequence, and the grouting of the gap between the inner mold cylinders 221 can improve the integrity of the grouting body 22 and thus improve the integrity of the connecting pile 2.

[0049] The inner mold cylinder 221, made of polyvinyl chloride, has a certain hardness to resist the pressure formed during the grouting and curing process between the inner mold cylinder 221 and the pile pipe 21. At the same time, the inner mold cylinder 221, made of polyvinyl chloride, makes it easy for workers to drill holes at the top of the inner mold cylinder 221.

[0050] In step S5, after grouting into the space between the connecting pile 2 and the pouring hole 1, before inserting the pile pipe 21 into the pouring hole 1, the venting bladder tube 31 is inserted into the through hole 4, and the filling bladder 3 is fitted over the throat tube 212 and inflated. After the pile pipe 21 reaches the preset position, an inner mold cylinder 221 with a cutting ring 5 at the bottom is placed into the pile pipe 21, and the cutting ring 5 cuts the venting bladder tube 31. The grout poured in the gap between the pile pipe 21 and the pouring hole 1 squeezes out the gas in the filling bladder 3 under its own gravity. Then, grout is injected between the outer wall of the inner mold cylinder 221 and the pull-out tube 211 until the grout covers the support rod 222.

[0051] The inner mold cylinder 221 and the support rod 222 enable grouting of the gap between the inner mold cylinder 221 and the pile pipe 21 first. Grouting the gap between the inner mold cylinder 221 and the pile pipe 21 first reduces the impact of grouting between the pile pipe 21 and the pouring hole 1 on the pile pipe 21. When grouting the upper layer, the grout between the lower inner mold cylinder 221 and the pile pipe 21 has already solidified, thereby improving the deformation resistance of the pile pipe 21.

[0052] In step S7, after the gap between the pile pipe 21 and the pouring hole 1 is grouted in layers, and the gap between the inner mold cylinder 221 and the inner wall of the pile pipe 21 is grouted in layers, a hole is drilled at the top of the inner mold cylinder 221, with the hole diameter being the same as the inner diameter of the inner mold cylinder 221; grouting is then poured into multiple inner mold cylinders 221 in a single, integral pour. After multi-layer grouting is achieved between the inner mold cylinder 221 and the pile pipe 21, the top of the inner mold cylinder 221 is drilled and then grouting is poured in an integral pour, which improves the integrity of the grouting body 22, thereby improving the integrity of the connecting pile 2; the hole diameter being the same as the inner diameter of the inner mold cylinder 221 increases the integrity and diameter of the post-pouring body.

[0053] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A method of multi-layer segmental grouting construction, characterized by: The method comprises the following steps: S1, preparation, determine the area to be treated and the severity of the problem, while cleaning the work area for construction; S2, the area to be treated is divided into multiple pouring zones along the vertical direction; S3, drilling, drilling multiple pouring holes (1) in the vertical direction of the area to be treated; S4, grouting, layer-by-layer grouting into the pouring hole (1); S5, place the connecting pile (2), insert the connecting pile (2) with an outer diameter smaller than the diameter of the drilled hole into the grout in the pouring hole (1); S6, wait for solidification; S7, other layers are poured in turn, and the last grouting is completely solidified; The connecting pile (2) comprises a pile pipe (21) and a grouting body (22), and the grouting body (22) is located in the pile pipe (21); the pile pipe (21) comprises a anti-pulling pipe (211) and a throat pipe (212); the anti-pulling pipe (211) is coaxially fixedly connected with the throat pipe (212) and communicates with the throat pipe (212); the diameter of the throat pipe (212) is smaller than the diameter of the anti-pulling pipe (211); the pouring zone divided along the vertical direction corresponds to a section of the throat pipe (212); the bottom end of the pile pipe (21) is closed; The grouting body (22) comprises an inner mold cylinder (221) and a support rod (222); the inner mold cylinder (221) is a tubular structure with a closed top end, and the support rod (222) is fixedly connected to the top end circumferential outer wall of the inner mold cylinder (221) vertically; and the outer diameter of the inner mold cylinder (221) is smaller than the inner diameter of the throat pipe (212); the end of the support rod (222) away from the inner mold cylinder (221) abuts against the throat pipe (212); multiple inner mold cylinders (221) are tightly abutted in turn; In step S5, after grouting into the space between the connecting pile (2) and the pouring hole (1), an inner mold cylinder (221) is placed in the pile pipe (21), grouting is performed between the outer wall of the inner mold cylinder (221) and the anti-pulling pipe (211), and the grout covers the support rod (222); In step S7, after layer-by-layer grouting in the gap between the pile pipe (21) and the pouring hole (1), and layer-by-layer grouting between the inner mold cylinder (221) and the inner wall of the pile pipe (21), a hole is drilled at the top end of the inner mold cylinder (221), the diameter of the hole is the same as the inner diameter of the inner mold cylinder (221); multiple inner mold cylinders (221) are integrally poured with grouting at a time; The outermost throat pipe (212) of the pile pipe (21) is provided with a filling bag (3); the filling bag (3) is sleeved outside the throat pipe (212), and the outer diameter of the filling bag (3) is coplanar with the outer diameter of the anti-pulling pipe (211) after inflation; the throat pipe (212) is provided with a through hole (4); the filling bag (3) is connected with a deflation bag pipe (31), the deflation bag pipe (31) communicates with the filling bag (3), and the deflation bag pipe (31) penetrates through the through hole (4) and is inserted into the throat pipe (212); the bottom end of the inner mold cylinder (221) is provided with a cut ring (5), and the cut ring (5) is used to cut off the deflation bag pipe (31); In step S5, after grouting the space between the pile (2) and the pouring hole (1), the pile pipe (21) is inserted into the pouring hole (1) before the air release bag pipe (31) is inserted into the through hole (4), the filling bag (3) is sleeved outside the spout pipe (212) and inflated; after the pile pipe (21) reaches the preset position; an inner mold cylinder (221) with a cutting ring (5) at the bottom end is placed in the pile pipe (21), and the cutting ring (5) cuts off the air release bag pipe (31).

2. The method according to claim 1, wherein: The inner mold cylinder (221) is made of polyvinyl chloride as raw material.

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