CN212409764U

CN212409764U - Mechanical response monitoring facilities installation mechanism of tunnel primary lining is exploded in mountain ridge brill

Info

Publication number: CN212409764U
Application number: CN202021155503.3U
Authority: CN
Inventors: 张东明; 陈明巧; 黄宏伟; 周鸣亮; 吴云清
Original assignee: Tongji University
Current assignee: Tongji University
Priority date: 2020-06-21
Filing date: 2020-06-21
Publication date: 2021-01-26
Anticipated expiration: 2030-06-21

Abstract

The application relates to tunnel, underground engineering and construction monitoring technologies, and provides a mechanical response monitoring equipment installation mechanism for primary lining of a mountain drilling and blasting tunnel. When a mountain tunnel is excavated by using a drilling and blasting method, after a primary lining steel bar net required by primary lining is arranged, a pre-buried box body with a cover plate sealed in a certain size is bound at the specified position of the primary lining steel bar net, after concrete spraying construction is completed, the cover plate of the pre-buried box body is opened, monitoring equipment is installed by utilizing an equipment base in the inner cavity of the pre-buried box body, and the mechanical response of the primary lining is monitored, so that the construction safety is guaranteed. Before the second lining construction, the monitoring equipment is detached, and the space of the inner cavity of the embedded box body is filled with concrete, so that the integrity and the safety of the primary lining structure are ensured. Through this application, the rubble that splashes when can prevent the monitoring facilities of lining just from being blasted injures the damage by a crashing object, can carry out high efficiency, monitor safely to the tunnel lining just the very first time after the face blasting.

Description

Mechanical response monitoring facilities installation mechanism of tunnel primary lining is exploded in mountain ridge brill

Technical Field

The application relates to tunnel, underground engineering and construction monitoring technologies, in particular to a mechanical response monitoring equipment installation mechanism for primary lining of a mountain drilling and blasting tunnel.

Background

In mountain tunnel engineering work progress, because the regional geological environment of construction is complicated, engineering accident takes place the probability big, because the geological environment that face the place ahead is located is unpredictable, it is uncertain to deposit the country rock situation, easily take place unpredictable engineering calamity, the event monitors the mechanical response of country rock and supporting construction in the tunnel work progress with the help of modern monitoring means, reflect the degree of influence of tunnel construction to surrounding environment, can ensure that the safety of tunnel engineering construction goes on smoothly, reduce and avoid unnecessary loss.

If a general manual monitoring method is adopted in the tunnel construction period, the defects of low monitoring frequency, large error, large personnel safety risk and the like exist, and the existing novel wireless intelligent sensing system plays an increasingly important role in tunnel monitoring by virtue of the advantages of all weather, high accuracy, automation and the like.

When a mountain tunnel excavated by a drilling and blasting method is constructed, a lot of broken stones are often scattered near a tunnel face, and supporting structure mechanical response monitoring equipment arranged near the tunnel face is probably hit, so that the supporting structure mechanical response monitoring equipment is a very large potential safety hazard for high-precision monitoring equipment.

SUMMERY OF THE UTILITY MODEL

The purpose of this application lies in: the defects of the prior art are overcome, and the installation mechanism of the mechanical response monitoring equipment for the primary lining of the mountain drill-blast tunnel is provided to solve the problems in the background art.

In order to achieve the above purpose, the present application provides the following technical solutions:

a mechanical response monitoring device installation mechanism for primary lining of a mountain drilling and blasting tunnel is characterized by comprising monitoring devices and a pre-buried box body;

the monitoring equipment comprises a laser sensor for measuring the convergence of the tunnel lining structure, an inclination angle sensor for measuring the attitude change of the tunnel lining structure, an electronic thermometer for measuring the internal temperature of the tunnel and a static level gauge for measuring the longitudinal differential settlement of the tunnel; the bottom of the monitoring equipment is provided with a hinged bolt hole;

the embedded box body consists of a box body, a cover plate, a connecting plate and an equipment base and is used for fixing and protecting monitoring equipment; the embedded box body is of a sealed waterproof structure; the strength of the box body and the cover plate is subjected to a field test, so that the structural integrity can be ensured after the construction of primary lining sprayed concrete is finished; the connecting plate is fixedly arranged at the bottom of the inner cavity of the pre-buried box body, and a plurality of threaded bolt holes are formed in the connecting plate and can be used for connecting an equipment base; a plurality of bolt holes are reserved on the bottom plate of the equipment base, the number and the positions of the bolt holes are consistent with those of a plurality of threaded bolt holes on the connecting plate, and the bolt holes of the equipment base can be fixedly connected with the bolt holes of the connecting plate by a plurality of bolts; the top of the equipment base is provided with a hinged bolt hole which can be fixedly connected with a hinged bolt hole of monitoring equipment by using a hinged bolt;

the size of the safety space required by the embedded box body is obtained by comprehensive calculation according to the size of monitoring equipment and the thickness of the primary lining concrete; the length and the width of the bottom plate of the embedded box body need to be additionally extended for a certain length along each side on the basis of the size of a safe space, and the embedded and fixed effect is achieved through the extension part and the later-stage concrete injection, so that the embedded box body is more firmly fixed on a primary lining structure; and a plurality of binding holes are distributed at the extending part of each side of the bottom plate of the embedded box body and are used for fixing the embedded box body on the primary lining reinforcing steel bar net.

The construction process comprises the following steps:

after the primary lining reinforcing mesh is arranged, a plurality of iron wires penetrate through a plurality of holes at the extending part of each side of the bottom plate of the embedded box body, and then the embedded box body with the sealed cover plate is bound to the primary lining reinforcing mesh by the plurality of iron wires, so that the embedded box body and the primary lining reinforcing mesh are tightly combined; when the embedded box body is installed, the bottom plate of the embedded box body faces the direction of the primary lining reinforcing mesh, and the cover plate of the embedded box body faces the direction of the sky of the mountain tunnel;

after the embedded box body is installed, spraying concrete to the primary lining reinforcing mesh, wherein the concrete is not directly aligned to an embedded box body cover plate when sprayed, so that the cover plate is prevented from being damaged; after the primary lining is finished by spraying concrete, removing the pre-buried box body cover plate, and installing the monitoring equipment on the equipment base; monitoring the mechanical response of the primary lining by using monitoring equipment;

before the second lining construction, the monitoring equipment is detached, and the space of the inner cavity of the embedded box body is filled with concrete, so that the integrity and the safety of the primary lining structure are ensured.

Drawings

FIG. 1 is a schematic diagram of a monitoring device in a mounting mechanism according to an embodiment of the present disclosure;

fig. 2 is a schematic structural diagram of a pre-buried box in the installation mechanism according to the embodiment of the present application;

fig. 3 is a schematic structural diagram of a base of a pre-buried box device in the installation mechanism according to the embodiment of the present application;

FIG. 4 is a schematic structural diagram of a combination of a pre-buried box and a monitoring device in an installation mechanism according to an embodiment of the present application

Fig. 5 is a schematic structural view of the embedded box body and the primary lining reinforcing mesh bound together during construction of the installation mechanism provided by the embodiment of the application;

fig. 6 is a schematic structural view of the embedded box and the primary lining structure after concrete is sprayed during construction of the installation mechanism according to the embodiment of the present application;

fig. 7 is a schematic structural diagram of the installation mechanism provided in the embodiment of the present application, after the monitoring device is removed before the second lining construction and the inner cavity of the embedded box is filled with concrete.

Description of the reference numerals

1 is monitoring equipment, 2 is a hinged bolt hole, 3 is a pre-buried box body, 4 is a hinged bolt, 5 is a primary lining reinforcing steel bar net, 6 is an iron wire, and 7 is concrete;

31 is a box body, 32 is a cover plate, 33 is a connecting plate, 34 is an equipment base, 35 is a bolt hole, 36 is a bolt and 37 is a binding hole.

Detailed Description

The technical solutions provided in the present application will be further described with reference to the following specific embodiments and accompanying drawings. The advantages and features of the present application will become more apparent in conjunction with the following description.

It should be noted that the embodiments of the present application have a better implementation and are not intended to limit the present application in any way. The technical features or combinations of technical features described in the embodiments of the present application should not be considered as being isolated, and they may be combined with each other to achieve a better technical effect. The scope of the preferred embodiments of this application may also include additional implementations, and this should be understood by those skilled in the art to which the embodiments of this application pertain.

Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.

The drawings in the present application are in simplified form and are not to scale, but rather are provided for convenience and clarity in describing the embodiments of the present application and are not intended to limit the scope of the application. Any modification of the structure, change of the ratio or adjustment of the size of the structure should fall within the scope of the technical disclosure of the present application without affecting the effect and the purpose of the present application. And the same reference numbers appearing in the various drawings of the present application designate the same features or components, which may be employed in different embodiments.

As shown in fig. 1, the monitoring device 1 comprises a laser sensor for measuring the convergence of the tunnel lining structure, an inclination sensor for measuring the attitude change of the tunnel lining structure, an electronic thermometer for measuring the temperature inside the tunnel, and a static level for measuring the longitudinal differential settlement of the tunnel; the bottom of the monitoring device 1 is provided with a hinged bolt hole 2.

As shown in fig. 2, the embedded box 3 is composed of a box body 31, a cover plate 32, a connecting plate 33 and an equipment base 34, and is used for fixing and protecting the monitoring equipment 1; the embedded box body 3 is of a sealed waterproof structure; the strength of the box body 31 and the cover plate 32 is subjected to field tests, so that the structural integrity can be ensured after the construction of the primary lining sprayed concrete 7 is completed; the connecting plate 33 is fixedly arranged at the bottom of the inner cavity of the embedded box body 3, and four threaded bolt holes 35 are formed in the connecting plate 33 and can be used for connecting the equipment base 34; the size of the safety space required by the embedded box body 3 is obtained by comprehensive calculation according to the size of the monitoring equipment 1 and the thickness of the primary lining concrete 7; the length of the equipment base 34 is 10cm, the width of the equipment base is 5cm, the height of the equipment base is 5cm, and after the monitoring equipment 1 is connected with the equipment base 34, the whole length is 10cm, the width of the equipment base is 5cm, and the height of the equipment base is 15 cm; the thickness of the primary lining concrete 7 is 20cm, in order to ensure the safety of the monitoring equipment 1, the height of the embedded box body 3 needs to exceed 5cm of the plane of the primary lining concrete 7, the length and width of the embedded box body 3 need to be increased by 10cm respectively on the basis of the length and width of the equipment base 34 to serve as operation spaces, and the length, width and height of the embedded box body 3 are 20cm, 15cm and 25 cm; the length and width of the bottom plate of the embedded box body 3 need to be extended by 2cm additionally along each side on the basis of the size of a safe space, and three binding holes 37 with the diameter of 0.5cm are arranged at the extending position of each side of the bottom plate of the embedded box body 3 and used for fixing the embedded box body 3 on the primary lining reinforcing steel bar net 5.

As shown in fig. 3, four bolt holes 35 are reserved on a bottom plate of the apparatus base 34, and the positions of the four bolt holes 35 are consistent with the positions of the four threaded bolt holes 35 on the connecting plate 33; the top of the equipment base 34 is provided with a hinged bolt hole 2;

as shown in fig. 4, after the embedded box 3 is combined with the monitoring device 1, four bolt holes 35 of the device base 34 are fixedly connected with four bolt holes 35 of the connecting plate 33 through four bolts 36; the equipment base 34 hinged bolt hole 2 is fixedly connected with the monitoring equipment 1 hinged bolt hole 2 through a hinged bolt 4;

the application provides a mechanical response monitoring facilities installation mechanism of tunnel primary lining is exploded in mountain ridge brill, its work flow as follows:

as shown in fig. 5, after the primary lining reinforcing mesh 5 is arranged, twelve iron wires 6 are passed through twelve binding holes 37 at the extending part of the bottom plate of the embedded box body 3, and the embedded box body 3 with the cover plate 32 sealed thereon is bound to the primary lining reinforcing mesh 5 by the twelve iron wires 6; when the embedded box body 3 is installed, the bottom plate of the embedded box body 3 faces the direction of the primary lining reinforcing steel bar net 5, and the cover plate 32 of the embedded box body 3 faces the direction of the mountain tunnel sky;

as shown in fig. 6, after the embedded box 3 is installed, the concrete 7 is sprayed to the primary lining reinforcing steel bar net 5, and the concrete 7 is not directly aligned to the cover plate 32 of the embedded box 3 when being sprayed, so that the cover plate 32 is prevented from being damaged; after the primary lining of the sprayed concrete 7 is finished, removing the cover plate 32 of the embedded box body 3, fixedly connecting four bolt holes 35 of an equipment base 34 with four bolt holes 35 of a connecting plate 33 by using four bolts 36, and fixedly connecting the hinged bolt holes 2 of the equipment base 34 with the hinged bolt holes 2 of the monitoring equipment 1 by using hinged bolts 4; monitoring the mechanical response of the primary lining by using the monitoring equipment 1;

as shown in fig. 7, before the second lining construction, the monitoring device 1 is removed and the space of the inner cavity of the embedded box body 3 is filled with concrete 7, so that the integrity and the safety of the primary lining structure are ensured.

It will be evident to those skilled in the art that the present application is not limited to the details of the foregoing illustrative embodiments, and that the present application may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. A mechanical response monitoring device installation mechanism for primary lining of a mountain drilling and blasting tunnel is characterized by comprising a monitoring device (1) and a pre-buried box body (3);

the monitoring equipment (1) comprises a laser sensor for measuring the convergence of the tunnel lining structure, an inclination angle sensor for measuring the attitude change of the tunnel lining structure, an electronic thermometer for measuring the internal temperature of the tunnel and a static level gauge for measuring the longitudinal differential settlement of the tunnel; the bottom of the monitoring device (1) is provided with a hinged bolt hole (2);

the embedded box body (3) consists of a box body (31), a cover plate (32), a connecting plate (33) and an equipment base (34), is of a sealed waterproof structure and is used for fixing and protecting the monitoring equipment (1); the connecting plate (33) is fixedly arranged at the bottom of the inner cavity of the embedded box body (3), and a plurality of threaded bolt holes (35) are formed in the connecting plate (33) and used for connecting the equipment base (34); a plurality of bolt holes (35) are reserved on a bottom plate of the equipment base (34), the number and the positions of the bolt holes (35) are consistent with those of the bolt holes (35) with threads on the connecting plate (33), and the equipment base (34) and the connecting plate (33) are fixed in a matched mode through a plurality of bolts (36) and the bolt holes (35); the top of the equipment base (34) is provided with a hinged bolt hole (2), and the equipment base (34) and the monitoring equipment (1) are fixed in a matched mode through a hinged bolt (4) and the hinged bolt hole (2).