A directional induced grouting device for splitting grouting

Abstract

The application discloses a kind of directional induced grouting devices of splitting grouting, it is related to underground engineering disease treatment technical field, including grouting pipe body, grouting pipe tip, core rod, sliding rod, connecting rod, inducing end rod body and inducing section skin film;The application is formed by setting inducing section skin film and inducing end rod body grouting induction piece, through the grouting induction piece of outside extension, the splitting direction of slurry can be directional induced in initial grouting, so that slurry diffusion is carried out towards preset direction, avoid slurry diffusion disorder, improve grouting reinforcement effect.Simultaneously grouting induction piece can be retracted into rod body, on the one hand, it is convenient and commonly used round drilling device matched use, on the other hand, directional induced grouting can be carried out in the structure (for example shield segment, underground pipe gallery etc.) of some reserved round grouting hole.

Description

A directional induced grouting device for split grouting Technical Field

[0001] This invention relates to the field of underground engineering defect treatment technology, and in particular to a directional induced grouting device for fracture grouting. Background Technology

[0002] Fracture grouting uses a high-pressure grouting process to inject cement or chemical grout into the soil layer to improve its properties. During the grouting process, the grout at the outlet of the grouting pipe applies additional compressive stress to the surrounding strata, causing shear cracks in the soil. The grout then splits along the cracks from the areas of low soil strength to the areas of high strength, and the grout that splits into the soil forms a network or skeleton that reinforces the soil.

[0003] In the current splitting grouting process, the grout cannot be injected in a directional manner and diffuses randomly, resulting in poor grouting reinforcement effect. Summary of the Invention

[0004] The purpose of this invention is to provide a directional induced grouting device for split grouting, so as to solve the problems existing in the prior art. It can realize the directional induction of the split direction of the grout, which improves the grouting reinforcement effect on the one hand, and can perform directional induced grouting on certain structures with reserved circular grouting holes (such as shield tunnel segments, underground pipe corridors, etc.).

[0005] To achieve the above objectives, the present invention provides the following solution:

[0006] This invention provides a directional induced grouting device for split grouting, comprising a grouting pipe body, a grouting pipe tip, a core rod, a sliding rod, a connecting rod, an induced end rod body, and an induced section membrane;

[0007] One end of the grouting pipe body is provided with the grouting pipe tip, and the other end of the grouting pipe body is an open structure; one end of the core rod extends into the cavity of the grouting pipe body through the opening and is connected to the grouting pipe tip, and the other end of the core rod extends out of the cavity of the grouting pipe body; the sliding rod is sleeved on the outside of the core rod and is slidably connected to the core rod; two connecting rods are provided, and the two sides of the sliding rod near the grouting pipe tip are respectively hinged to one end of the two connecting rods;

[0008] The grouting pipe body has two strip-shaped openings on both sides near the tip of the grouting pipe. The induction section membrane is sealed at both of the strip-shaped openings. The induction section membrane has two states: contraction and expansion. The induction section membrane is provided with a grout outlet that communicates with the cavity of the grouting pipe body. During grouting, the grout flows out through the grout outlet on the induction section membrane after passing through the cavity of the grouting pipe body.

[0009] The induction section membrane is connected to the induction end rod. The end of the induction end rod away from the tip of the grouting pipe is hinged to the grouting pipe body, and the end of the induction end rod near the tip of the grouting pipe is hinged to the other end of the connecting rod. When the sliding rod is pushed toward the tip of the grouting pipe, the sliding rod causes the ends of the two connecting rods to unfold, thereby causing the induction end rod to drive the induction section membrane to unfold.

[0010] Preferably, it further includes a sliding termination device, which is a limiting tube fixed to the tip of the grouting pipe and sleeved on the outside of the core rod. The limiting tube is opposite to the sliding rod and is used to limit the stroke of the sliding rod.

[0011] Preferably, both the core rod and the sliding rod are provided with an end locking hole. When the sliding rod is pushed toward the limiting tube and reaches the midpoint of its stroke, the end locking holes on the core rod and the sliding rod coincide and can be locked by a locking pin.

[0012] Preferably, the induction section membrane unfolds into a fan shape, and the grout outlet is located at a corner of the fan shape away from the grouting pipe body.

[0013] Preferably, the core rod is located at the axis of the grouting pipe body.

[0014] Preferably, the two connecting rods are arranged symmetrically about the core rod.

[0015] Preferably, the two induction segment membranes are arranged symmetrically with respect to the core rod.

[0016] The present invention achieves the following beneficial technical effects compared to the prior art:

[0017] The directional induced grouting device for splitting grouting provided by this invention forms a grouting induction plate by setting an induction section membrane and an induction end rod. The outward-extending grouting induction plate can directionally guide the splitting direction of the grout in the early stages of grouting, causing the grout to diffuse in a predetermined direction, avoiding disordered grout diffusion and improving the grouting reinforcement effect. Simultaneously, the grouting induction plate can be retracted into the rod body, which facilitates its use with existing common circular drilling devices and enables directional induced grouting in structures with pre-reserved circular grouting holes (such as shield tunnel segments and underground pipe corridors). Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 is a schematic diagram of the directional induced grouting device for splitting grouting in this invention, wherein the induced section membrane is in a contracted state;

[0020] Figure 2 is a cross-sectional view along line AA in Figure 1;

[0021] Figure 3 is a schematic diagram of the directional induced grouting device for splitting grouting in this invention, wherein the induced section membrane is in the unfolded state;

[0022] Figure 4 is a cross-sectional view along the BB direction of Figure 3;

[0023] Figure 5 shows the soil reinforcement effect of the directional induced grouting device using the splitting grouting method of the present invention.

[0024] In the diagram: 1-core rod, 2-sliding rod, 3-connecting rod, 4-induction section membrane, 5-induction end rod body, 6-sliding termination device, 7-grouting pipe tip, 8-hinge point one, 9-hinge point two, 10-hinge point three, 11-grouting pipe body, 12-end locking hole, 13-grout outlet, 14-solidified body, 15-grouting machine, 16-soil, 17-grouting port. Detailed Implementation

[0025] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0026] The purpose of this invention is to provide a directional induced grouting device for fracturing grouting, so as to solve the problems existing in the prior art.

[0027] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0028] The directional induced grouting device for splitting grouting in this embodiment, as shown in Figures 1-4, includes a grouting pipe body 11, a grouting pipe tip 7, a core rod 1, a sliding rod 2, a connecting rod 3, an induced end rod body 5, and an induced section membrane 4.

[0029] One end of the grouting pipe body 11 is provided with a grouting pipe tip 7, and the other end of the grouting pipe body 11 is provided with a grouting port 17; one end of the core rod 1 extends into the cavity of the grouting pipe body 11 from the grouting port 17 end and is connected to the grouting pipe tip 7, and the other end of the core rod 1 extends out of the cavity of the grouting pipe body 11; the sliding rod 2 is sleeved on the outside of the core rod 1 and is slidably connected to the core rod 1; two connecting rods 3 are provided, and the two sides of the sliding rod 2 near the grouting pipe tip 7 are respectively hinged to one end of the two connecting rods 3;

[0030] The grouting pipe body 11 has two strip-shaped openings on both sides near the tip 7 of the grouting pipe. Both strip-shaped openings are sealed with an induction section membrane 4. The induction section membrane 4 has two states: contraction and expansion. The end of the induction section membrane 4 is provided with a grout outlet 13 that communicates with the cavity of the grouting pipe body 11. During grouting, the grout flows out through the cavity of the grouting pipe body 11 and then through the grout outlet 13 at the end of the induction section membrane 4.

[0031] The induction section membrane 4 is connected to an induction end rod 5. The end of the induction end rod 5 away from the tip 7 of the grouting pipe is hinged to the grouting pipe body 11, and the end of the induction end rod 5 near the tip 7 of the grouting pipe is hinged to the other end of the connecting rod 3. When the sliding rod 2 is pushed toward the tip 7 of the grouting pipe, the sliding rod 2 causes the ends of the two connecting rods 3 to unfold, thereby causing the induction end rod 5 to drive the induction section membrane 4 to unfold.

[0032] To ensure that the sliding rod 2 does not slide up or down to the designated position, a sliding termination device 6 is also provided. The sliding termination device 6 is a limiting tube, which is fixed to the tip 7 of the grouting pipe and sleeved on the outside of the core rod 1. The limiting tube is opposite to the sliding rod 2 to limit the stroke of the sliding rod 2. Both the core rod 1 and the sliding rod 2 are provided with an end locking hole 12. When the sliding rod 2 is pushed toward the limiting tube and reaches the midpoint of its stroke, the end locking holes 12 on the core rod 1 and the sliding rod 2 coincide and are locked by the locking pin. The axial displacement of the sliding rod 2 is restricted both up and down, which can prevent it from sliding up and down.

[0033] In this specific embodiment, the induction section membrane 4 unfolds into a fan shape, and the grout outlet 13 is located at a corner of the fan shape away from the grouting pipe body 11.

[0034] In this specific embodiment, the core rod 1 is located at the axis of the grouting pipe body 11; the two connecting rods 3 are symmetrically arranged with the core rod 1 as the center, and the two induction section membranes 4 are symmetrically arranged with the core rod 1 as the center.

[0035] The working principle of the directional induced grouting device for splitting grouting in this invention is as follows:

[0036] The sliding rod 2 slides up and down, causing the connecting rod 3 to rotate around the hinge point 10 between the connecting rod 3 and the sliding rod 2. The connecting rod 3 and the inducing end rod 5 have hinge point 1 (8), and the inducing end rod 5 and the grouting pipe body 11 have hinge point 2 (9). This causes the connecting rod 3 to drive the inducing end rod 5 to expand outwards, thereby causing the inducing section membrane 4 to unfold outwards. A sliding termination device 6 is provided at the upper end of the core rod 1. When the sliding rod 2 slides to this position, the inducing section membrane 4 is fully unfolded. At this time, a locking pin can be inserted into the end locking hole 12 for fixation, preventing the sliding rod 2 from sliding back and forth. The end of the inducing section membrane 4 has a grout outlet 13. Grout is injected into the soil through the grout outlet 13 along the cavity of the grouting pipe body 11 (as shown in Figure 5). In this device, the grouting inducing plate, composed of the inducing section membrane 4 and the inducing end rod 5, can cut the soil in the unfolding direction during the unfolding process, achieving the purpose of inducing the directional diffusion of grout.

[0037] This invention has illustrated its principles and implementation methods using specific examples. The descriptions of these embodiments are merely illustrative of the method and its core ideas; furthermore, those skilled in the art will recognize that modifications may be made to the specific implementation methods and application scope based on the principles of this invention. Therefore, the content of this specification should not be construed as limiting the invention.

Claims

1. A directional induced grouting device for fracturing grouting, characterized in that: The system includes a grouting pipe body, a grouting pipe tip, a core rod, a sliding rod, a connecting rod, an induction end rod body, and an induction section membrane. One end of the grouting pipe body has the grouting pipe tip, and the other end has a grouting port. One end of the core rod extends from the grouting port end of the grouting pipe body into the cavity of the grouting pipe body and connects to the grouting pipe tip; the other end of the core rod extends out of the cavity of the grouting pipe body. The sliding rod is sleeved on the outside of the core rod and slidably connected to it. Two connecting rods are provided, with the two sides of the sliding rod near the grouting pipe tip hinged to one end of each of the two connecting rods. The grouting pipe body has two strip-shaped openings near the grouting pipe tip, both of which are sealed with the induction section membrane. The induction section membrane has two states: contraction and expansion. The end of the induction section membrane has a grout outlet communicating with the cavity of the grouting pipe body. During grouting operations... The grout flows out from the outlet at the end of the induction section membrane after passing through the cavity of the grouting pipe body. An induction end rod is connected to the induction section membrane. The end of the induction end rod away from the tip of the grouting pipe is hinged to the grouting pipe body, and the end of the induction end rod near the tip of the grouting pipe is hinged to the other end of the connecting rod. When the sliding rod is pushed towards the tip of the grouting pipe, the sliding rod causes the ends of the two connecting rods to unfold, thereby causing the induction end rod to drive the induction section membrane to unfold. A sliding termination device is also included. The sliding termination device is a limiting tube, which is fixed to the tip of the grouting pipe and sleeved on the outside of the core rod. The limiting tube and the sliding rod are opposite each other to limit the stroke of the sliding rod. Both the core rod and the sliding rod are provided with an end locking hole. When the sliding rod is pushed towards the limiting tube and reaches the midpoint of its stroke, the end locking holes on the core rod and the sliding rod coincide and can be locked by a locking pin.

2. The directional induced grouting device for fracturing grouting according to claim 1, characterized in that: The induction section membrane unfolds into a fan shape, and the grout outlet is located at a corner of the fan shape away from the grouting pipe body.

3. The directional induced grouting device for fracturing grouting according to claim 1, characterized in that: The core rod is located at the axis of the grouting pipe body.

4. The directional induced grouting device for fracturing grouting according to claim 3, characterized in that: The two connecting rods are arranged symmetrically about the core rod.

5. The directional induced grouting device for fracturing grouting according to claim 3, characterized in that: The two induction segment membranes are symmetrically arranged with the core rod as the center.

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