阅读说明：本技术 用于模筑混凝土衬砌背后密实度检测的装置 (Device for detecting compactness behind mold-built concrete lining ) 是由 郑龙超 王明胜 姜冲 路军富 张阳 任天烁 张增彩 赵银龙 于 2020-03-24 设计创作，主要内容包括：本发明公开了一种用于模筑混凝土衬砌背后密实度检测的装置,包括：受压结构,其包括圆柱筒、第一板体和第二板体,所述第一板体设置在所述圆柱筒的上端,所述第二板体可移动的设置在所述圆柱筒内以在圆柱筒内形成一个体积可调节的密闭空间,所述第一板体和第二板体之间设置有若干弹簧,所述弹簧上缠绕电阻丝；电阻显示仪,其与所述电阻丝通过导线电性连接以显示电阻丝受挤压时的电阻变化。本发明的装置制作简单、成本低廉,使用时只需要在衬砌背后安装该装置和布设线路,没有复杂繁琐的施工要求,并且能够直观的反映二次衬砌混凝土的浇注情况,实现混凝土衬砌背后密实度可视化检测控制。(The invention discloses a device for detecting compactness of the back of a moulded concrete lining, which comprises: the pressure structure comprises a cylindrical barrel, a first plate body and a second plate body, wherein the first plate body is arranged at the upper end of the cylindrical barrel, the second plate body is movably arranged in the cylindrical barrel to form a closed space with adjustable volume in the cylindrical barrel, a plurality of springs are arranged between the first plate body and the second plate body, and resistance wires are wound on the springs; and the resistance display instrument is electrically connected with the resistance wire through a lead to display the resistance change of the resistance wire when the resistance wire is extruded. The device disclosed by the invention is simple to manufacture and low in cost, only needs to be installed and a line is laid on the back of the lining when in use, does not have complicated and fussy construction requirements, can visually reflect the pouring condition of secondary lining concrete, and realizes visual detection and control of the compactness of the back of the concrete lining.)

1. A device that is used for closely knit degree detection behind mould building concrete lining, its characterized in that includes:

the compression structure comprises a cylindrical barrel, a first plate body and a second plate body, wherein the first plate body is arranged at the upper end of the cylindrical barrel, the second plate body is movably arranged in the cylindrical barrel, the second plate body, the first plate body and the cylindrical barrel form a closed space with a compressible volume, a plurality of springs are arranged between the first plate body and the second plate body, and resistance wires are wound on the springs;

and the resistance display instrument is electrically connected with the resistance wire through a lead to display the resistance change of the resistance wire when the resistance wire is extruded.

2. An apparatus for mold building concrete lining back compaction detection according to claim 1, further comprising a pouring alarm device, the pouring alarm device comprising:

a power source;

the alarm is electrically connected with the power supply through a lead;

the conducting strip, it includes first conducting strip and second conducting strip, first conducting strip is installed the centre of first plate body, the centre at the second plate body is installed to the second conducting strip, first conducting strip and second conducting strip constitute switch on power and alarm connecting circuit to make the second conducting strip receive the extrusion upward movement butt when first conducting strip, power and alarm form the return circuit.

3. The apparatus for testing the compactness of a rear portion of a modular concrete lining according to claim 1, wherein the plurality of springs are uniformly provided on the first plate body with a center of the first plate body as a symmetrical point.

4. An apparatus for compaction behind a modular concrete lining according to claim 1 wherein the number of springs is 4.

5. An apparatus for testing compactness behind a modular concrete lining according to claim 1, wherein the spring is a spiral high strength spring whose spiral shape is sequentially reduced in diameter from bottom to top so that the spring is gradually contracted into a disc shape during compression.

6. An apparatus for testing the compaction behind a modular concrete lining according to claim 2, it is characterized in that a plurality of first bulges are arranged on the lower surface of the first plate body in a circular array manner by taking the center of the first plate body as the circle center, a second bulge is arranged at the center of the first plate body, a first groove corresponding to the first bulge is arranged on the upper surface of the second plate body, a second groove corresponding to the second protrusion, one end of the spring is connected to the first protrusion, the other end is connected to the first groove, the first conducting strip is arranged at the second bulge, the second conducting strip is arranged at the second groove, when the second plate body is completely pressed, the spring is pressed in the first groove, and the first conducting strip and the second conducting strip are pressed in the second groove.

7. The apparatus for detecting the compactness behind a modular concrete lining according to claim 1, wherein an annular convex edge is arranged on the inner side of the lower end of the cylindrical barrel so as to clamp the second plate body in the cylindrical barrel.

8. An apparatus for testing compactness of a rear of a modular concrete lining according to claim 1, wherein the first plate body is provided with fixing lugs.

9. An apparatus for testing the compactness of a rear surface of a molded concrete lining according to claim 1, wherein a magnetic sheet is provided at a bottom of the resistance display instrument.

Technical Field

The invention relates to the field of underground engineering. More particularly, the present invention relates to an apparatus for measuring the compaction of the back of a cast concrete lining.

Background

In recent years, with the rapid development of national economy in China, the construction of railway tunnel engineering, highway tunnel engineering, municipal subway station engineering, bridge pile foundation underpinning engineering and the like is more and more emphasized, and accordingly, the situation that concrete needs to be poured behind a lining in the engineering construction process is met. At present, in the process of pouring secondary lining in tunnel engineering, municipal subway station engineering, bridge underpinning engineering and the like, due to the fact that the construction method, the proficiency of constructors and the like can cause that a large number of cavities exist behind the lining after concrete pouring is finished, and the cavities are not easy to be found by field constructors, so that great influence is caused on future operation and maintenance of tunnels, subway stations, bridges and the like, and even the driving safety of an operation line can be endangered. And if the projects are not found after being delivered for use, maintenance is required at a great expense, and immeasurable social influence is caused.

Disclosure of Invention

An object of the present invention is to solve at least the above problems and/or disadvantages and to provide at least the advantages described hereinafter.

The invention also aims to provide a device for detecting the compactness of the back of the molded concrete lining, which can visually reflect the pouring condition of secondary lining concrete and realize visual detection control on the compactness of the back of the concrete lining.

To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided an apparatus for compaction detection of a back of a molded concrete lining, comprising:

the compression structure comprises a cylindrical barrel, a first plate body and a second plate body, wherein the first plate body is arranged at the upper end of the cylindrical barrel, the second plate body is movably arranged in the cylindrical barrel, the second plate body, the first plate body and the cylindrical barrel form a closed space with a compressible volume, a plurality of springs are arranged between the first plate body and the second plate body, and resistance wires are wound on the springs;

and the resistance display instrument is electrically connected with the resistance wire through a lead to display the resistance change of the resistance wire when the resistance wire is extruded.

Through the relation between the resistance change of the calibration resistance wire and the pressure in advance for when pouring secondary lining concrete, the resistance display instrument can show the form of the reading that the spring is extruded and causes the resistance change of the resistance wire to judge the change of the pouring pressure.

Preferably, the pouring alarm device further comprises:

a power source;

the alarm is electrically connected with the power supply through a lead;

the conducting strip, it includes first conducting strip and second conducting strip, first conducting strip is installed the centre of first plate body, the centre at the second plate body is installed to the second conducting strip, first conducting strip and second conducting strip constitute switch on power and alarm connecting circuit to make the second conducting strip receive the extrusion upward movement butt when first conducting strip, power and alarm form the return circuit.

The circuit of alarm and conducting strip forms the return circuit after first conducting strip and second conducting strip contact, and the warning light scintillation explains behind the secondary lining concrete laminating lining cutting, at this moment, can further pour into a mould, makes the secondary lining concrete and the laminating degree behind the lining cutting further improve.

Preferably, the plurality of springs are uniformly arranged on the first plate body with the center of the first plate body as a symmetrical point. The springs are symmetrically arranged in the center of the first plate body, so that when the second plate body is extruded, the extrusion force applied to each spring is the same, and the second plate body vertically moves towards the first plate body.

Preferably, the number of the springs is 4.

Preferably, the spring is a spiral high-strength spring, and the spiral shape of the spring is sequentially reduced in diameter from bottom to top so that the spring is gradually contracted into a disc shape in the compression process.

Preferably, the first plate body is provided with a plurality of first bulges in a circular array manner by taking the center of the first plate body as a circle center, the center of the first plate body is provided with a second bulge, the upper surface of the second plate body is provided with a first groove corresponding to the first bulge and a second groove corresponding to the second bulge, one end of the spring is connected at the first bulge, the other end of the spring is connected at the first groove, the first conducting plate is arranged at the second bulge, and the second conducting plate is arranged at the second groove, so that when the second plate body is completely extruded, the spring is extruded in the first groove, and the first conducting plate and the second conducting plate are extruded in the second groove. The spring and the conducting strip are stored in the first groove and the second groove after being compressed by arranging the first groove and the second groove, so that the first plate body and the second plate body are completely abutted.

Preferably, the lower extreme inboard of cylinder is provided with cyclic annular protruding edge to with the second plate body joint in the cylinder, avoid it from the lower extreme roll-off of cylinder.

Preferably, the first plate body is provided with a fixing lug. Through setting up fixed ear, be convenient for fix the device behind the lining cutting through the bolt.

Preferably, the bottom of the resistance display instrument is provided with a magnetic sheet. Through setting up the magnetic sheet, be convenient for quick fix the outside at the steel form with resistance display appearance is quick.

The invention at least comprises the following beneficial effects: the detection device is embedded before secondary lining pouring, when the secondary lining concrete pouring is finished, the pressure generated by the concrete presses the second plate body on the first body, the first conducting plate and the second conducting plate are in contact conduction, and the pressure is transmitted to an alarm lamp and a resistance display instrument arranged outside through a circuit arranged behind the lining to display the pouring condition, wherein the resistance display instrument can display the pouring pressure, so that the compactness of the concrete is judged, and the visual detection control of the pouring process is realized. The device disclosed by the invention is simple to manufacture and low in cost, only needs to be installed and a line is laid on the back of the lining when in use, does not have complicated and fussy construction requirements, can visually reflect the pouring condition of secondary lining concrete, and realizes visual detection and control of the compactness of the back of the concrete lining.

Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.

Drawings

FIG. 1 is a schematic diagram of a detecting device according to an embodiment of the present invention;

fig. 2 illustrates a schematic view of a disassembled structure after being cut by a pressed structure.

1. Fixing the ear; 2. a first plate body; 3. a wire guide hole; 4. a conductive sheet; 5. a wire; 6. a cylindrical barrel; 7. a resistance wire; 8. a spring; 9. a second plate body; 10. a magnetic sheet; 11. a resistance display instrument; 12. an alarm; 13. a power source.

Detailed Description

The present invention is further described in detail below with reference to the attached drawings so that those skilled in the art can implement the invention by referring to the description text.

It will be understood that terms such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.