阅读说明：本技术 一种盾构隧道接缝堵漏注浆方法 (Leaking stoppage and grouting method for shield tunnel joint ) 是由 万小准 林慧如 于海洋 于 2021-09-01 设计创作，主要内容包括：本发明公开了一种盾构隧道接缝堵漏注浆方法,属于隧道施工领域,盾构隧道的管片连接螺栓采用注浆螺栓,注浆螺栓包括固定连接的头部和螺杆,头部开设有延伸至螺杆内的注浆通道,注浆通道的侧壁开设有通至螺杆外部的注浆孔,头部可拆卸连接有封堵注浆通道的堵头；注浆螺栓的注浆孔位于隧道的接缝处；接缝堵漏注浆步骤如下：S1.对渗漏部位的接缝内侧进行清洁,并对接缝浅层进行填塞封堵；S2.打开注浆螺栓的堵头,通过注浆通道对接缝内部进行注浆,边注浆边观察接缝处的渗漏水情况,直至渗漏水情况减弱至消除；S3.注浆结束,将堵头装回注浆螺栓的头部,密封注浆通道。避免了传统方法对隧道进行钻孔带来的结构损伤及外界水砂喷涌入隧道带来的安全风险。(The invention discloses a leaking stoppage grouting method for a shield tunnel joint, which belongs to the field of tunnel construction.A duct piece connecting bolt of a shield tunnel adopts a grouting bolt, the grouting bolt comprises a head and a screw which are fixedly connected, the head is provided with a grouting channel extending into the screw, the side wall of the grouting channel is provided with a grouting hole communicated to the outside of the screw, and the head is detachably connected with a plug for plugging the grouting channel; the grouting holes of the grouting bolts are positioned at the joints of the tunnels; the steps of seam leaking stoppage and grouting are as follows: s1, cleaning the inner side of a seam of a leakage part, and plugging a shallow seam layer; s2, opening a plug of the grouting bolt, grouting the inside of the joint through a grouting channel, and observing the water leakage condition at the joint while grouting until the water leakage condition is weakened to be eliminated; and S3, after grouting is finished, installing the plug back to the head of the grouting bolt, and sealing the grouting channel. The structural damage caused by drilling the tunnel by the traditional method and the safety risk caused by the fact that external water sand is sprayed into the tunnel are avoided.)

1. A method for plugging and grouting a shield tunnel joint is characterized in that a duct piece connecting bolt of a shield tunnel adopts a grouting bolt, the grouting bolt comprises a head part and a screw rod which are fixedly connected, the head part is provided with a grouting channel extending into the screw rod, the side wall of the grouting channel is provided with a grouting hole communicated with the outside of the screw rod, and the head part is detachably connected with a plug for plugging the grouting channel; the grouting holes of the grouting bolts are positioned at the joints of the tunnels;

the steps of seam leaking stoppage and grouting are as follows:

s1, cleaning the inner side of a seam of a leakage part, and plugging a shallow seam layer;

s2, opening a plug of the grouting bolt, grouting the inside of the joint through a grouting channel, and observing the water leakage condition at the joint while grouting until the water leakage condition is weakened to be eliminated;

and S3, after grouting is finished, installing the plug back to the head of the grouting bolt so as to seal the grouting channel.

2. The method of claim 1, wherein the step S1 is performed by removing the laitance, the grime, and the caulk when cleaning the inside of the joint.

3. The method for plugging and grouting a shield tunnel joint according to claim 1, wherein in step S1, rapid hardening cement is used for plugging a shallow seam layer.

4. The method for plugging and grouting a shield tunnel joint according to claim 1, wherein in the step S2, the grout used in grouting is modified epoxy resin grout or ultra-fine cement grout.

5. The method for plugging and grouting a shield tunnel joint according to claim 1, wherein the plug is a sealing screw in threaded fit with the grouting channel.

6. The method of claim 1, wherein the plurality of grouting holes are spaced apart.

7. The method of claim 1, wherein the grouting passage is arranged axially along the grouting bolt.

Technical Field

The invention belongs to the technical field of tunnel construction, and particularly relates to a leaking stoppage and grouting method for a shield tunnel joint.

Background

With the rapid development of domestic traffic infrastructure, more and more tunnels are built by adopting a shield method. The shield tunnel has more joints due to the characteristics of the construction method. The water leakage from the joints has a great influence on the durability and safety of the tunnel structure and the internal equipment.

At present, a method for treating water leakage of a shield tunnel joint is mainly characterized in that a hole is drilled on a duct piece of the tunnel in a manual mode near a leakage position, the duct piece is an innermost barrier of the tunnel and bears load, the duct piece is a permanent lining structure of the shield tunnel, and the duct pieces are connected through bolts; when the water leakage is treated, as shown in figure 1, a hole 5 is drilled in the pipe piece 1 and communicated with a tunnel joint 4, then grouting is carried out on the joint 4 through the hole 5, grouting plugging is carried out, and the hand hole 3 is used for installing the connecting bolt 2 of the pipe piece 1. The method can damage the reinforcing steel bars in the concrete when the method is not operated properly, damages are brought to the tunnel structure, and meanwhile, if the water pressure outside the tunnel is high, the structure is drilled through in the drilling process, so that external water sand can be sprayed into the tunnel through the drill hole, and a high safety risk is brought.

Disclosure of Invention

The invention aims to provide a method for plugging and grouting a shield tunnel joint, which aims to solve the problems of safety risk and structural damage caused by the traditional method for plugging the shield tunnel joint.

In order to realize the purpose of the invention, the technical scheme is as follows: a shield tunnel seam plugging and grouting method is characterized in that a duct piece connecting bolt of a shield tunnel adopts a grouting bolt, the grouting bolt comprises a head and a screw which are fixedly connected, the head is provided with a grouting channel extending into the screw, the side wall of the grouting channel is provided with a grouting hole communicated with the outside of the screw, and the head is detachably connected with a plug for plugging the grouting channel; the grouting holes of the grouting bolts are positioned at the joints of the tunnels;

the steps of seam leaking stoppage and grouting are as follows:

s1, cleaning the inner side of a seam of a leakage part, and plugging a shallow seam layer;

s2, opening a plug of the grouting bolt, grouting the inside of the joint through a grouting channel, and observing the water leakage condition at the joint while grouting until the water leakage condition is weakened to be eliminated;

and S3, after grouting is finished, installing the plug back to the head of the grouting bolt so as to seal the grouting channel.

As a further alternative, the catalyst may be stripped of the laitance, the grime, and the caulk during the in-seam cleaning in step S1.

As a further alternative, in step S1, quick setting cement is used to plug the shallow seam.

As a further alternative, in step S2, the slurry used in grouting is a modified epoxy resin slurry or an ultra-fine cement slurry.

As a further alternative, the plug is a sealing screw which is in threaded fit with the grouting channel.

As a further alternative, the grouting holes are arranged in plurality at intervals.

As a further alternative, the grouting passage is provided axially along the grouting bolt.

The invention has the beneficial effects that: the grouting channel and the grouting holes are arranged in the segment connecting bolts of the shield tunnel, and the leakage joints are subjected to grouting leakage stoppage through the grouting channel and the grouting holes, so that structural damage caused by drilling of the tunnel structure by the joint leakage stoppage in the traditional method and safety risks caused by spraying of outside water and sand into the tunnel caused by drilling are avoided.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it should be understood that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic view of a method for treating water leakage at a shield tunnel joint in the prior art;

FIG. 2 is a schematic diagram of a method for plugging and grouting a shield tunnel joint according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a grouting bolt used in a method for plugging and grouting a shield tunnel joint according to an embodiment of the present invention;

reference numerals: 1-pipe piece, 2-connecting bolt, 3-hand hole, 4-joint, 5-hole, 6-head, 7-screw, 8-grouting channel, 9-grouting hole and 10-plug.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention. It is to be understood that the drawings are provided solely for the purposes of reference and illustration and are not intended as a definition of the limits of the invention. The connection relationships shown in the drawings are for clarity of description only and do not limit the manner of connection.

It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. 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 invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

The invention is further described with reference to the following figures and specific embodiments.

According to the method for plugging and grouting the joints of the shield tunnel, the connecting bolts 2 of the segments 1 of the shield tunnel adopt grouting bolts, as shown in figure 3, each grouting bolt comprises a head 6 and a screw 7 which are fixedly connected, each head 6 is provided with a grouting channel 8 extending into the screw 7, the side wall of each grouting channel 8 is provided with a grouting hole 9 communicated with the outside of the screw 7, and each head 6 is detachably connected with a plug 10 for plugging the corresponding grouting channel 8; the grouting holes 9 of the grouting bolts are positioned at the joints of the tunnels;

the steps of seam leaking stoppage and grouting are as follows:

s1, cleaning the inner side of a seam of a leakage part, and plugging a shallow seam layer;

s2, opening a plug 10 of the grouting bolt, grouting the inside of the joint through a grouting channel 8, observing the water leakage condition at the joint while grouting until the water leakage condition is weakened to be eliminated;

and S3, after grouting is finished, installing the plug 10 back to the head 6 of the grouting bolt to seal the grouting channel 8.

When the shield tunnel is provided with the duct piece 1, the duct piece 1 is connected by grouting bolts so as to facilitate subsequent plugging operation. The shallow layer of the joint, namely the area of the joint close to the outside, is filled with rapid-setting cement for plugging, and other materials can be adopted. As shown in fig. 2, after plugging, grouting is performed through the grouting bolt connected with the duct piece 1, grout flows into the joint 4 through the grouting channel 8 and the grouting hole 9, grouting can be finished until the water leakage phenomenon disappears, and the grouting channel 8 is sealed by the plug 10.

In step S1, the catalyst, grime, and caulk are removed while cleaning the interior of the joint 4. In step S2, the slurry used in grouting is a modified epoxy resin slurry or an ultra-fine cement slurry, and other plugging materials may also be used.

The plug 10 is a sealing screw in threaded fit with the grouting channel 8, so that the plug is convenient to disassemble, assemble and plug, and other structural forms can be used for plugging. The 9 interval arrangements in slip casting hole are a plurality ofly, make the quick even flow direction seam 4 departments of thick liquid, have improved slip casting efficiency, also do benefit to and guarantee slip casting leaking stoppage effect, and concrete quantity and mode of arranging can set up as the condition.

The grouting channel 8 is axially arranged along the grouting bolt, and can be arranged in other directions according to conditions, and the shape and the length of the grouting channel can be set as required.

The invention is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.