阅读说明：本技术 一种浆液可控旋转注浆头及注浆方法 (Controllable rotary grouting head for grout and grouting method ) 是由 卢士涛 张健 张战胜 李旺 高强 李亮亮 于文铭 张利生 李景涛 孟毅 曲萍 于 2021-08-18 设计创作，主要内容包括：本公开涉及土木工程中桩基加固技术领域,具体的涉及一种浆液可控旋转注浆头及注浆方法。本发明公开了一种浆液可控旋转注浆头,包括注浆管,注浆管包括第一注浆管和第二注浆管,第一注浆管的一端与第二注浆管的一端通过螺纹卡扣连接；分别在第一注浆管、第二注浆管相连接的端部的内壁上开设环形卡槽；注浆头插接于第一注浆管内；注浆头的一端通过卡环与环形卡槽滑动连接；注浆头安装有水驱动涡轮；本发明的旋转注浆头,通过注浆头旋转切削土体,使桩身土体出现可控空腔,与传统注浆相比,有效克服了传统注浆,浆液流动不易控制,浆液利用率低等缺点。(The disclosure relates to the technical field of pile foundation reinforcement in civil engineering, in particular to a slurry controllable rotary grouting head and a grouting method. The invention discloses a controllable rotary grouting head for slurry, which comprises a grouting pipe, wherein the grouting pipe comprises a first grouting pipe and a second grouting pipe, and one end of the first grouting pipe is connected with one end of the second grouting pipe through a threaded buckle; annular clamping grooves are formed in the inner walls of the ends, connected with the first grouting pipe and the second grouting pipe, of the first grouting pipe and the second grouting pipe respectively; the grouting joint is inserted in the first grouting pipe; one end of the grouting head is connected with the annular clamping groove in a sliding mode through a clamping ring; the grouting head is provided with a water-driven turbine; the rotary grouting head provided by the invention can cut soil body through rotation of the grouting head, so that the soil body of the pile body has a controllable cavity.)

1. The controllable rotary grouting head for the grout is characterized by comprising a grouting pipe, wherein the grouting pipe comprises a first grouting pipe and a second grouting pipe, and one end of the first grouting pipe is connected with one end of the second grouting pipe through a threaded buckle; annular clamping grooves are formed in the inner walls of the ends, connected with the first grouting pipe and the second grouting pipe, of the first grouting pipe and the second grouting pipe respectively; the grouting joint is inserted in the first grouting pipe; one end of the grouting head is connected with the annular clamping groove in a sliding mode through a clamping ring; the grouting head is provided with a water-driven turbine.

2. The controllable rotary grouting head of claim 1, wherein the main bodies of the first grouting pipe, the second grouting pipe and the grouting head are hollow cylindrical structures; the inner diameter and the outer diameter of the first grouting pipe and the second grouting pipe are respectively the same.

3. A slurry controllable rotary grouting head as claimed in claim 1, characterized in that the other end of the grouting head is provided with a crushing head; the crushing head is in a cone structure; the end part of the first grouting pipe, which is not connected with the second grouting pipe, is in a cone structure.

4. A slurry controlled rotary grouting head as claimed in claim 3, characterized in that the conical surface of the crushing head and the conical surface of the first grouting pipe form a common conical surface.

5. The controllable rotary grouting head of claim 1, wherein the grouting head has liquid ejecting holes on its outer circumference; the liquid spray holes are symmetrically arranged along the outer circumferential surface.

6. A slurry controllable rotary grouting head as claimed in claim 1, characterized in that the ring-shaped groove is provided around the inner circumferential surface of the grouting pipe; the size of the annular clamping groove along the axial direction of the grouting pipe is larger than the size of the depth of the annular clamping groove along the circumferential direction of the grouting pipe.

7. The controllable rotary grouting head of claim 1, wherein the snap ring is positioned at the end of the grouting head and perpendicular to the length direction of the grouting head, the snap ring is embedded in the annular clamping groove, and the shape of the snap ring is matched with that of the annular clamping groove; the snap ring slides in the annular clamping groove along the axial direction of the grouting pipe.

8. The controllable rotary grouting head of claim 1, wherein external threads are provided at the outer circumferential surfaces where the first grouting pipe and the second grouting pipe are connected, respectively; the threaded buckle is of a hollow cylindrical structure, and an internal thread is arranged on the inner circumferential surface; the inner diameter of the threaded fastener is matched with the outer diameter of the grouting pipe.

9. A slurry controllable rotary grouting head as claimed in claim 1, characterised in that a sealing gasket is provided at one end of the annular groove.

10. A grouting method of a controllable rotary grouting head for grout is characterized by comprising the following specific steps:

embedding a grouting pipe and a grouting head into a cast-in-place pile in advance;

injecting high-pressure water into the grouting pipe, and enabling a grouting head in the grouting pipe to extend out of the outer side of the grouting pipe under the pressure action of the water; the pile body concrete is crushed by the crushing head of the grouting head;

under the action of water pressure, water in the grouting head is driven to drive a turbine to drive the grouting head to rotate;

the liquid spraying holes on the outer wall of the grouting head increase water pressure to the soil body under the rotation action, and the rotation of the grouting head and the cutting of the soil body around the pile body by the crushing head are added, so that a controllable cavity is formed in the soil body around the pile body;

and injecting grout into the grouting pipe, wherein the grout passes through a grouting head of the grouting pipe and fills the cavity through a liquid spraying hole in the grouting head.

Technical Field

The disclosure relates to the technical field of pile foundation reinforcement in civil engineering, in particular to a slurry controllable rotary grouting head and a grouting method.

Background

The medium sand foundation, the clay foundation and the clay foundation with proper drainage conditions can be subjected to compaction grouting to increase the density of soil, improve the strength and the seepage-proofing performance of a soil body, change the physical and mechanical properties of the soil body and improve the bearing capacity of a soft soil foundation; after the concrete engineering construction is carried out in a water seepage place, if the measures are improper and the quality is not controlled tightly, the water seepage phenomenon often occurs to the poured concrete, so that the engineering use is influenced, and even engineering accidents can be caused by serious water seepage. In general, when concrete is poured in a water seepage place, waterproof concrete and other anti-seepage measures are adopted, but when water seepage occurs after the measures are taken, grouting and water plugging measures are required. The conventional grouting and water plugging modes comprise wall-breaking grouting and wall-breaking grouting, and can be divided into common grouting and chemical grouting according to different adopted grout materials.

Mostly be threaded connection between slip casting head and the slip casting pipe, because of long-term the use, smooth silk phenomenon can appear in the screw thread, dismantles the slip casting head and causes inconvenience, influences operating time, increases work load, and simultaneously, the external diameter of the slip casting head among the prior art is greater than the external diameter of slip casting pipe, can make the slip casting liquid pile up on the slip casting head in the use, is not convenient for wash, also can cause inconvenience to dismantling.

At present, in the process of pile foundation grouting reinforcement construction, a steel grouting pipe is generally adopted to be embedded into a cast-in-place pile, then grouting is carried out through a grouting head at the top end of a steel pipe, and the main defects are as follows: 1. the flowing of the slurry is not easy to control; 2. the utilization rate of the slurry is low; 3. the grouting reinforcement quality of the pile foundation cannot be guaranteed.

Disclosure of Invention

Aiming at the defects of the prior art, the invention aims to provide a slurry controllable rotary grouting head and a grouting method, which can achieve slurry controllability, improve the utilization rate of slurry and improve the pile foundation reinforcement effect.

In order to achieve the above object, one or more embodiments of the present invention provide the following technical solutions:

the invention discloses a controllable rotary grouting head for slurry, which comprises a grouting pipe, wherein the grouting pipe comprises a first grouting pipe and a second grouting pipe, and one end of the first grouting pipe is connected with one end of the second grouting pipe through a threaded buckle; annular clamping grooves are formed in the inner walls of the ends, connected with the first grouting pipe and the second grouting pipe, of the first grouting pipe and the second grouting pipe respectively; the grouting joint is inserted in the first grouting pipe; one end of the grouting head is connected with the annular clamping groove in a sliding mode through a clamping ring; the grouting head is provided with a water-driven turbine;

furthermore, the main bodies of the first grouting pipe, the second grouting pipe and the grouting head are of hollow cylindrical structures; the inner diameter and the outer diameter of the first grouting pipe and the second grouting pipe are the same;

furthermore, a crushing head is arranged at the other end of the grouting head; the crushing head is in a cone structure; the end part of one end of the first grouting pipe, which is not connected with the second grouting pipe, is in a cone structure;

furthermore, the conical surface of the crushing head and the conical surface of the first grouting pipe form a common conical surface;

furthermore, the outer circumferential surface of the grouting head is provided with a liquid spraying hole; the liquid spraying holes are symmetrically arranged along the outer circumferential surface;

furthermore, the annular clamping groove is arranged around the inner circumferential surface of the grouting pipe in a circle; the size of the annular clamping groove along the axial direction of the grouting pipe is larger than the size of the annular clamping groove along the circumferential groove depth of the grouting pipe;

furthermore, the clamping ring is positioned at the end part of the grouting head and is vertical to the length direction of the grouting head, the clamping ring is embedded into the annular clamping groove, and the shape of the clamping ring is matched with that of the annular clamping groove; the clamping ring is horizontally moved in the annular clamping groove along the axial direction of the grouting pipe;

further, external threads are arranged on the outer circumferential surfaces connected with the first grouting pipe and the second grouting pipe respectively;

further, the thread buckle is of a hollow cylindrical structure, and an internal thread is arranged on the inner circumferential surface; the inner diameter of the threaded fastener is matched with the outer diameter of the grouting pipe;

further, a sealing gasket is arranged at one end of the annular clamping groove;

in addition, the invention discloses a grouting method of a controllable rotary grouting head for grout, which comprises the following specific steps:

embedding a grouting pipe and a grouting head into a cast-in-place pile in advance;

injecting high-pressure water into the grouting pipe, and enabling a grouting head in the grouting pipe to extend out of the outer side of the grouting pipe under the pressure action of the water; the pile body concrete is crushed by the crushing head of the grouting head;

under the action of water pressure, water in the grouting head is driven to drive a turbine to drive the grouting head to rotate;

the liquid spraying holes on the outer wall of the grouting head increase water pressure to the soil body under the rotation action, and the rotation of the grouting head and the cutting of the soil body around the pile body by the crushing head are added, so that a controllable cavity is formed in the soil body around the pile body;

and injecting grout into the grouting pipe, wherein the grout passes through a grouting head of the grouting pipe and fills the cavity through a liquid spraying hole in the grouting head.

The beneficial effects of one or more technical schemes are as follows:

according to the rotary grouting head, the grouting head is used for cutting soil body in a rotating manner, so that a controllable cavity is formed in the soil body of the pile body, and compared with the traditional grouting, the rotary grouting head effectively overcomes the defects that the traditional grouting is difficult to control the flow of slurry, the utilization rate of the slurry is low and the like; meanwhile, the rotary grouting head is safe to use, convenient to operate and good in grouting effect in the grouting process, and brings a new idea and process for grouting reinforcement.

Drawings

The invention is further illustrated with reference to the following figures and examples.

FIG. 1 is a cross-sectional view of the grouting head of the present invention shown unexploded;

FIG. 2 is a cross-sectional view of the grouting head of the present invention as it is ejected;

FIG. 3 is a schematic illustration of the present invention prior to grouting in operation;

FIG. 4 is a schematic illustration of the cavity formed during operation of the present invention;

fig. 5 is a schematic illustration of the invention after cavity grouting during operation.

In the figure, 1, a crushing head, 2, a grouting head, 3, a liquid spraying hole, 4, a clamping ring, 5, a thread buckle, 6, a water-driven turbine, 7, a sealing gasket, 8, a first grouting pipe, 9, a second grouting pipe wheel, 10, an annular clamping groove, 11, a soil body, 12, a filling pile, 13, a cavity, 14 and a grouting consolidation body.

Detailed Description

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an", and/or "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof;

as described in the background section, in the prior art, in the process of grouting reinforcement construction of a pile foundation, a steel grouting pipe is generally embedded into a cast-in-place pile, and then grouting is performed through a grouting head at the top end of the steel pipe, which has the following main disadvantages: 1. the flowing of the slurry is not easy to control; 2. the utilization rate of the slurry is low; 3. the grouting reinforcement quality of the pile foundation cannot be guaranteed.

Example 1

Referring to fig. 1-4, the invention discloses a controllable rotating grouting head 2 for grout, comprising a grouting pipe, wherein the grouting pipe comprises a first grouting pipe 8 and a second grouting pipe 9, and one end of the first grouting pipe 8 is connected with one end of the second grouting pipe 9 through a threaded buckle 5; annular clamping grooves 10 are respectively formed in the inner walls of the ends, connected with the first grouting pipe 8 and the second grouting pipe 9, of the two grouting pipes; the grouting head 2 is inserted into the first grouting pipe 8; one end of the grouting head 2 is connected with the annular clamping groove 10 in a sliding mode through a clamping ring 4; the grouting head 2 is equipped with a water-driven turbine 6.

As shown in fig. 1, an external thread is arranged on the outer wall of one end of the first grouting pipe 8 connected with the second grouting pipe 9, and an external thread is arranged on the outer wall of one end of the second grouting pipe 9 connected with the first grouting pipe 8; screw thread buckle 5 sets up the internal thread, establishes 5 covers of screw thread buckle outside first slip casting pipe 8 and second slip casting pipe 9, and the external screw thread that matches on internal thread and first slip casting pipe 8 and the second slip casting pipe 9 through screw thread buckle 5 realizes being connected of first slip casting pipe 8 and second slip casting pipe 9.

Screw thread buckle 5 is cavity cylinder type structure, and the main part of first slip casting pipe 8 and second slip casting pipe 9 is hollow cylindrical structure, and the one end tip of first slip casting pipe 8 not being connected with second slip casting pipe 9 is the cone structure, and the circular cone top is outwards.

The first grouting pipe 8 and the second grouting pipe 9 are distributed along the axis, and annular clamping grooves 10 are formed in the first grouting pipe 8 and the second grouting pipe 9; an annular clamping groove 10 is formed in the inner wall of one end, connected with the second grouting pipe 9, of the first grouting pipe 8, and an annular clamping groove 10 is formed in the inner wall of one end, connected with the first grouting pipe 8, of the second grouting pipe 9.

As shown in fig. 1 and 2, the ring-shaped clamping grooves 10 on the first grouting pipe 8 and the second grouting pipe 9 extend along the circumferential direction of the grouting pipes, the ring-shaped clamping grooves 10 surround 360 degrees of the inner circumferential surface of the grouting pipes, and the cross section of the ring-shaped clamping grooves 10 is in a ring shape; the length of the ring-shaped clamping groove 10 is larger than the height thereof, namely the dimension of the ring-shaped clamping groove 10 along the axial direction of the grouting pipe is larger than the dimension thereof along the circumferential direction of the grouting pipe.

As shown in fig. 1, a grouting head 2 is arranged in a first grouting pipe 8, a crushing head 1 is arranged at one end of the grouting head 2, the crushing head 1 is in a cone structure, and the conical surface of the cone of the crushing head 1 and the conical surface of the first grouting pipe 8 can form a common conical surface; the grouting head 2 is inserted into the first grouting pipe 8 and can move in the first grouting pipe 8 along the axial direction of the grouting pipe;

as shown in fig. 1 and 2, one end of the grouting head 2 is of a cone structure, and the other end is provided with a clamping ring 4; the clamping ring 4 is perpendicular to the length direction of the grouting head 2, the clamping ring 4 is embedded into the annular clamping groove 10 and matched with the annular clamping groove 10 in shape, the clamping ring 4 can slide in the annular clamping groove 10 in a translational mode, the grouting head 2 slides in the annular clamping groove 10 through the clamping ring 4, accordingly, the grouting head 2 can move in the first grouting pipe 8 in a translational mode, and the annular clamping groove 10 plays a role in limiting movement of the grouting head 2; the slip casting pipe freely slides in ring groove 10 stroke, does reciprocating motion, and then realizes slip casting head 2 freely flexible in the slip casting pipe to prevent slip casting head 2 from breaking away from the slip casting pipe.

The outer wall of the grouting head 2 is provided with liquid spraying holes 3, and the liquid spraying holes 3 are symmetrically distributed on the outer circumferential surface of the grouting head 2; the shotcrete holes 3 enable a liquid, such as water or grout, to be poured from the grouting pipe through the shotcrete holes 3 of the grouting head 2 into the body 11 of concrete.

As shown in fig. 1 and 2, one end of the annular clamping groove 10, which is located at the first grouting pipe 8, is provided with a sealing gasket 7, and when the clamping ring 4 moves to the end of the annular clamping groove 10, the sealing gasket 7 can ensure a full sealing effect between the clamping ring 4 and the annular clamping groove 10, so that the grouting head 2 is prevented from having grout between the clamping ring 4 and the annular clamping groove 10 in the grouting process.

As shown in fig. 1 and 2, a water-driven turbine 6 is provided inside the grouting head 2, the water-driven turbine 6 rotates the grouting head 2, and the grouting head 2 is rotated to cut a pile body soil 11 when the pile body soil is drilled into concrete.

Example 2

The invention discloses an application method of a controllable rotary grouting head 2 for slurry, which comprises the following specific steps:

embedding a grouting pipe and a grouting head 2 into a cast-in-place pile 12 in advance;

high-pressure water is injected into the grouting pipe, so that a grouting head 2 in the grouting pipe extends out of the outer side of the grouting pipe under the action of the pressure of the water; the pile body concrete is crushed by the crushing head 1 of the grouting head 2;

the water in the grouting head 2 is driven to drive the turbine 6 to drive the grouting head 2 to rotate under the action of water pressure;

the hydraulic pressure of the soil body 11 is increased by the liquid spraying holes 3 on the outer wall of the grouting head 2 under the rotation action, and the soil body 11 around the pile body is cut by the rotation of the grouting head 2 and the crushing head 1, so that a controllable cavity 13 is formed in the soil body around the pile body;

and injecting grout into the grouting pipe, wherein the grout passes through the grouting head 2 of the grouting pipe and fills the cavity 13 through the liquid spraying hole 3 on the grouting head 2.

As shown in fig. 3, the grouting head 2 is buried in the cast-in-place pile 12, wherein the grouting head 2 is not ejected from the grouting pipe, and water is not injected into the grouting pipe; when high-pressure water is injected into the grouting pipe, as shown in fig. 4, the grouting head 2 is driven by the water-driven turbine 6 to rotate, water flow in the grouting hole is ejected, and a cavity 13 is formed in the soil body 11 around the pile body; the size of the cavity 13 is actually controlled according to the requirement of grouting liquid, so that the flow quantity and the speed of the grouting liquid are controlled; when the required size of the cavity 13 is reached, grout is injected into the grouting pipe, and the grout flows into the cavity 13 from the liquid spraying holes 3 to form a grouting consolidation body 14, so that the soil body 11 is consolidated.

In light of the foregoing description of the preferred embodiment of the present invention, it is to be understood that numerous changes and modifications may be made without departing from the spirit and scope of the invention as defined by the appended claims. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.