CN114323934A

CN114323934A - Expansive force testing system based on contact surface of high polymer and concrete pipeline

Info

Publication number: CN114323934A
Application number: CN202111411452.5A
Authority: CN
Inventors: 赵焱; 郑成志; 杜明瑞; 方宏远; 赵鹏; 张皓月; 王振扬
Original assignee: Guangdong Yuehai Water Investment Co ltd; Zhengzhou University; National Engineering Research Center for Water Resources of Harbin Institute of Technology Co Ltd
Current assignee: Guangdong Yuehai Water Investment Co ltd; Zhengzhou University; National Engineering Research Center for Water Resources of Harbin Institute of Technology Co Ltd
Priority date: 2021-11-25
Filing date: 2021-11-25
Publication date: 2022-04-12
Also published as: KR20230077623A

Abstract

The invention discloses an expansion force testing system based on a contact surface of a high polymer and a concrete pipeline, which comprises a support device, a counter-force loading mechanism hoisted at the top of the support device and an expansion force testing device placed at the bottom of the support device, wherein the counter-force loading mechanism is arranged on the top of the support device; the expansion force testing device comprises a supporting structure for supporting a pipeline to be tested, a filling cavity for grouting filling is arranged in the supporting structure, when the test is started, a preset area of the pipeline to be tested, which is placed on the supporting structure, is in contact with filler in the filling cavity, and a pressure sensor is arranged in the contact area; the counter force loading mechanism is arranged above the expansion force testing device and used for applying vertical pressure to the pipeline to be tested. The method aims to obtain the real expansion force of the contact surface of the high polymer material and the concrete pipeline.

Description

Expansive force testing system based on contact surface of high polymer and concrete pipeline

Technical Field

The invention relates to the technical field of underground pipe gallery engineering, in particular to an expansive force testing system based on a contact surface of a high polymer and a concrete pipeline.

Background

At present, with the appearance of aging of underground pipelines, hidden diseases such as cracking, leakage, void, subsidence and the like of pipe bodies immediately occur, and further road surface collapse of a plurality of cities is caused, and the life and property safety of people is seriously threatened, however, an underground pipe network system belongs to underground hidden engineering, a large amount of financial expenses are consumed in the traditional excavation replacement technology, a series of problems such as environment, traffic, society and the like are caused, and the loss is difficult to estimate, so the non-excavation repair technology becomes a research and development direction, in particular to a high polymer grouting rapid repair technology. Compared with the traditional excavation repair or cement grouting repair technology, the high polymer grouting technology has the outstanding advantages of high speed (quick reaction consolidation), accurate repair position, stability (keeping the surrounding environment stable), low cost (low comprehensive cost), wide application range) and the like.

When the polymer grouting technology is adopted to treat the hollow diseases of the underground pipeline, the self-expansion characteristic of the polymer material in the repairing process enables the polymer material and the pipeline to generate expansion force, and the repaired polymer material is tightly adhered to the existing pipeline structure to jointly bear other loads in subsequent operation. In actual engineering, the environment for grouting and repairing the high polymer is complex and changeable, and the real expansion force between the high polymer and the concrete pipeline is difficult to obtain by a traditional indoor self-expansion performance test method.

The prior patent CN208488357U discloses a high polymer thick liquid is from expansion characteristic testing arrangement, through testing different water pressure environment, obtains the expansion characteristic of high polymer thick liquid under the different water pressure, but does not directly acquire the actual expansibility under the effect of high polymer thick liquid and concrete pipe direct pressure, and then can not react the real prosthetic conditions between high polymer and the concrete pipe, consequently, need for one kind to be used for testing the device of the expansibility of high polymer and concrete pipe contact surface urgently.

Disclosure of Invention

The invention mainly aims to provide an expansive force testing system based on a contact surface of a high polymer and a pipeline, and aims to solve the technical problem that the expansive force of the contact surface of the high polymer and the concrete pipeline is difficult to obtain in the prior art.

In order to achieve the aim, the invention provides an expansion force testing system based on a contact surface of a high polymer and a concrete pipeline, which comprises a support device, a counter-force loading mechanism hoisted at the top of the support device and an expansion force testing device placed at the bottom of the support device, wherein the counter-force loading mechanism is arranged on the top of the support device;

the expansion force testing device comprises a supporting structure for supporting a pipeline to be tested, a filling cavity for grouting filling is arranged in the supporting structure, when the test is started, a preset area of the pipeline to be tested, which is placed on the supporting structure, is in contact with filler in the filling cavity, and a pressure sensor is arranged in the contact area;

the counter force loading mechanism is arranged above the expansion force testing device and used for applying vertical pressure to the pipeline to be tested.

Optionally, the support device comprises a base at the bottom, a plurality of supports fixed on the base, and a beam arranged at the upper end of the supports, wherein a beam hook is arranged at the center of the beam, and the beam hook is connected with the counterforce loading mechanism.

Optionally, the supporting structure comprises a front baffle and a rear baffle which are arranged on the base and have a preset distance, and two side baffles fixedly connected between the front baffle and the rear baffle.

Optionally, the front baffle, the rear baffle and the two side baffles are respectively fixed to a top plate, and each top plate is correspondingly provided with an observation hole or a grouting hole.

Optionally, the upper surfaces of the front baffle and the rear baffle are arc-shaped, and the size of each arc is matched with that of the pipeline to be tested.

Optionally, the inner side of each top plate is tangent to the circular arc-shaped edges of the front baffle plate and the rear baffle plate.

Optionally, the front and rear baffles are sealed from the pipe to be tested by gaskets.

Optionally, the front and rear baffles are connected with ribs provided with auxiliary supports, and each rib is arranged outside the filling cavity.

Optionally, the cross beam is adjustably connected to the bracket.

Optionally, the counter force loading mechanism is connected with at least one jack loader and a stress sensor arranged at the lower end of each jack loader.

The invention provides an expansion force testing system based on a contact surface of a high polymer and a concrete pipeline, which comprises a support device, a counter-force loading mechanism hoisted at the top of the support device and an expansion force testing device placed at the bottom of the support device, wherein the counter-force loading mechanism is arranged on the top of the support device; the expansion force testing device comprises a supporting structure for supporting a pipeline to be tested, a filling cavity for grouting filling is arranged in the supporting structure, when the test is started, a preset area of the pipeline to be tested, which is placed on the supporting structure, is in contact with filler in the filling cavity, and a pressure sensor is arranged in the contact area; the counter force loading mechanism is arranged above the expansion force testing device and used for applying vertical pressure to the pipeline to be tested. According to the arrangement of the test system, different pipelines to be tested are prefabricated, different pressures are applied to the pipelines to be tested through the counter-force loading mechanism, expansion force data on the contact surface of the high polymer grouting material and the concrete pipeline can be collected and monitored in real time through the pressure sensor, and the collected data are further analyzed, so that the rule of influence of factors such as upper pressure, high polymer density and interface water content on the expansion force of the contact interface of the high polymer grouting material and the concrete pipeline can be finally obtained; the system is carried out indoors, the test device is simple in structure and convenient to operate, and in the process of repairing the pipeline by high polymer grouting, the expansion force generated by the high polymer and the surface of the pipeline acts to be closer to the actual working condition, so that corresponding theoretical support is provided for the design of repairing the high polymer grouting of the underground pipeline void diseases.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

FIG. 1 is a schematic structural diagram of a front view of an embodiment of an expansive force testing system based on the contact surface of a high polymer and a concrete pipeline;

FIG. 2 is a side view of the embodiment shown in FIG. 1;

FIG. 3 is a top view of the embodiment of FIG. 1;

FIG. 4 is a partial schematic structural view of the stent structure of the embodiment shown in FIG. 1;

FIG. 5 is a view of the embodiment of FIG. 1 with the pressure sensors arranged radially along the conduit;

FIG. 6 is a view of the embodiment of FIG. 1 with the pressure sensors arranged axially along the conduit.

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				1	Stand device	2	Counter-force loading mechanism
3	Expansive force testing device	4	Pipeline to be tested
				11	Base seat	12	Support frame
13	Cross beam	21	Jack loader
				22	Stress sensor	31	Support structure
32	Filling cavity	41	Pressure sensor
				42	Pipe side	43	Pipe buttock
44	Tube bottom	45	Tube side-tube hip center
				46	Center of tube hip-tube bottom	111	First fixed part
131	Beam hook	132	Second fixing part
				311	Front baffle	312	Back baffle
313	Side baffle	314	Rib plate
				315	Top board	3151	Grouting hole
3152	Observation hole

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

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 given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that all directional indicators (such as up, down, left, right, front, and back) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.

Referring to fig. 1 to 6, the invention provides an expansion force testing system based on a contact surface of a high polymer and a concrete pipeline, which comprises a support device 1, a counter force loading mechanism 2 hung on the top of the support device 1, and an expansion force testing device 3 placed at the bottom of the support device 1.

The support device 1 comprises a base 11 at the bottom, a plurality of supports 12 fixed on the base 11 and a cross beam 13 arranged at the upper end of the supports 12, wherein a cross beam hook 131 is arranged at the center of the cross beam 13.

The counter-force loading mechanism 2 is hoisted to the top of the support device 1 through the beam lifting hook 131, and the counter-force loading mechanism 2 is arranged above the expansion force testing device 3 and used for applying vertical pressure to the pipeline 4 to be tested.

The expansion force testing device 3 comprises a supporting structure 31 for supporting the pipeline 4 to be tested, and a filling cavity 32 for grouting filling is arranged in the supporting structure 31.

At the start of the test, a preset area of the pipe to be tested 4 placed on the support structure 31 is brought into contact with the filling in the filling chamber 32 and a pressure sensor 41 is arranged in the contact area.

Specifically, the filler in the filling cavity 32 is generally a high polymer material used for testing the expansion force of the pipeline 4 to be tested, so that the real expansion force action data on the contact surface of the high polymer grouting material and the concrete pipeline can be collected and monitored in real time through the pressure sensor 41; the support structure 31 includes front and

rear fenders

311 and 312 disposed on the base 11 at a predetermined interval and two side fenders 313 fixedly connecting the front and rear fender bases 11, and a filling chamber 32 for grouting filling is formed by the front and

rear fenders

311 and 312 and the two side fenders 313. The supporting structure 31 is placed on the base 11, preferably, the surface of the side barrier 313 is provided with a slot matching with the front and

back barriers

311, 312, and the base 11 is provided with a corresponding slot matching with the two side barriers 313, as shown in fig. 1, the supporting structure 31 is fixed on the base 11 by placing the front and

back barriers

311, 312 along the two side barriers 313 and the slot on the base, and fixing the two side barriers 313 in the slots reserved on the base 11 by screws, respectively.

Further, as shown in fig. 1 to 2, 4 brackets 12 are connected with the base 11 through screw holes, each connecting portion is adapted with a screw hole, and the brackets 12 are vertically fixed with the base 11 through the screw holes by 4 first fixing members 111, preferably the first fixing members 111 are hexagon bolts; meanwhile, as shown in fig. 3, the cross beam 13 is an i-shaped structure, corresponding reserved holes are formed at four rectangular corner positions of the cross beam 13, so that the bracket 12 passes through the corresponding reserved holes and is clamped up and down by 4 sets of second fixing pieces 132 respectively located on the same horizontal plane, and then the upper end of the bracket 12 is fixed to the connection, preferably, the second fixing pieces 132 are hexagon nuts, the bracket 12 is a cylindrical threaded structure, so that the up-and-down movement and the fixing of the cross beam 13 and the bracket 12 are realized, and further, each set of hexagon nuts 132 is divided into two upper and lower parts. In addition, other structural arrangements that can achieve the connection of the rack device 1 can be implemented, and are not limited to the above structural arrangements.

Further, as shown in fig. 1 to 4, the support structure 31 further includes top plates 315 for fixing the front and

rear baffle plates

311 and 312 and the two side baffle plates 312, respectively, the two top plates 315 are fixedly connected to the upper portions of the two side baffle plates 313 and the front and

rear baffle plates

311 and 312 by bolts, and an observation hole 3152 and a grouting hole 3151 are formed through each top plate 315. The provision of the observation hole 3152 makes it possible to effectively discharge the air inside the filling chamber 32 and to observe whether or not the high polymer can be inflated to fill the filling chamber 32 in the entire support structure 31.

Further, the upper surfaces of the front and

rear baffles

311 and 312 are arc-shaped, and the size of each arc is matched with that of the pipeline 4 to be tested. Preferably, the front and

rear baffles

311, 312 are identical in structure.

Further, the inner side of each top plate 315 is tangent to the circular arc-shaped edges of the front and

rear baffle plates

311 and 312 and is vertically fixed on the upper parts of the side baffle plate 313 and the front and

rear baffle plates

311 and 312; preferably, the thickness of the top plate 315, the thickness of the side baffle 313, the thickness of the front baffle 311, the thickness of the back baffle 312 are all 10mm, and the specific size can be adjusted according to the actual requirement.

Further, the front and

rear baffles

311, 312 are sealed with the pipe 4 to be tested by a gasket. Preferably, the gasket is made of high-temperature-resistant silica gel plate material.

Further, as shown in fig. 2 and 4, ribs 314 for auxiliary support are connected to the front and

rear baffles

311 and 312, and each rib 314 is disposed outside the filling chamber 32. By providing the ribs 314 on the front and

rear fenders

311, 312, the rigidity and stability of the support structure 31 is increased. Preferably, the rib 314 is vertically disposed at the center line of the circular arc surface of the front and

rear baffles

311 and 312, and is horizontal to the lowest point of the circular arc surface.

Further, as shown in fig. 1 and 2, at least one jack loader 21 and a stress sensor 22 provided at a lower end of each jack loader 21 are connected to the reaction force loading mechanism 2. Specifically, 3 jack loaders are arranged on the lower portion of the cross beam 13 at equal intervals according to the length of the concrete pipeline sample, and a stress sensor 12 is arranged at the lower end of each jack loader and used for feeding back the magnitude of vertical pressure applied by the jack loader.

In addition, the specific steps of the expansive force test system based on the contact surface of the high polymer and the concrete pipeline for the expansive force test in the embodiment include:

firstly, preparing a pipeline to be tested 4 with a composite preset requirement in advance, wherein the pipeline to be tested comprises a prefabricated concrete pipeline sample under anhydrous and water conditions, and fixing a pressure sensor 41 on the outer wall surface of the concrete pipeline sample which is in contact with a high polymer consolidation body;

specifically, generally, according to the length of the concrete pipeline sample, starting from the pipeline center, at intervals of 1/8 pipeline lengths, as shown in fig. 5 and 6, 5 groups of pressure sensors 41 are vertically arranged on the outer wall of the concrete pipeline sample contacted with the high polymer consolidation body, each group comprises 5 pressure sensors, wherein 3 pressure sensors are arranged at the pipeline side 42, the pipeline hip 43 and the pipeline bottom 44, the other 2 pressure sensors are arranged at the pipeline side-pipeline hip center 45 and the pipeline hip-pipeline bottom center 46, and each group of pressure sensors 41 at the same position are all on the same horizontal plane, and the pressure sensors 41 adopt high-precision optical fiber pressure sensors.

Horizontally and fixedly placing the concrete pipeline sample on the front baffle 311 and the rear baffle 312 of the supporting structure 31, and adopting high-temperature-resistant silica gel plate gaskets to seal the places where the concrete pipeline sample is to be contacted with the front baffle 311 and the rear baffle 312 so as to realize the sealing purpose in the expansion force testing process;

lifting the cross beam 13, enabling the lower end of the stress sensor 22 to abut against the upper portion of the concrete pipeline sample, vertically clamping the cross beam 13 by four groups of second fixing pieces 132 on the same horizontal plane, applying vertical pressure to the concrete pipeline sample by using the jack loader 21 until the two ends of the concrete pipeline sample are completely embedded into the arc-shaped surfaces of the front baffle 311 and the rear baffle 312, and changing the vertical pressure applied to the concrete pipeline sample by using the jack loader 21 under the condition that the whole concrete pipeline sample meets the target requirement so as to enable the concrete pipeline sample to bear upper pressures of different sizes; the second fixing member 132 is a hexagonal nut.

Step four, grouting and filling the inner cavity through a grouting hole 3151 reserved at the upper end of the top plate 315, after grouting is started, quickly closing the observation hole 3152 once grout is found to emerge from the observation hole 3152, and controlling the density of a high polymer consolidation body in the cavity by changing the amount of injected raw materials;

and step five, after the high polymer grouting material is foamed and fully fills the filling cavity 32, the high-precision optical fiber pressure sensor positioned on the outer wall of the concrete pipeline can acquire and monitor the expansion force action on the contact surface of the high polymer grouting material and the concrete pipeline in real time, grouting is stopped when the amount of injected raw materials reaches the design standard, and the test is stopped at the moment.

By analyzing the collected data, the rule of influence of factors such as upper pressure, high polymer density and interface water content on the expansion force of the contact interface of the high polymer grouting material and the concrete pipeline can be obtained, the bonding form of the concrete pipeline and the high polymer grouting material in the high polymer grouting repairing process can be simulated really, and then corresponding theoretical support is provided for the high polymer grouting repairing design of the underground pipeline void diseases.

It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. The term "comprising", without further limitation, means that the element so defined is not excluded from the group of processes, methods, articles, or systems that include the element. The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An expansion force testing system based on a contact surface of a high polymer and a concrete pipeline is characterized by comprising a support device, a counter-force loading mechanism hoisted at the top of the support device and an expansion force testing device placed at the bottom of the support device;

2. The system for testing the expansive force on the basis of the contact surface of the high polymer and the concrete pipeline as claimed in claim 1, wherein the support device comprises a base at the bottom, a plurality of supports fixed on the base and a cross beam arranged at the upper end of the supports, a cross beam hook is arranged at the center of the cross beam, and the cross beam hook is connected with the counter force loading mechanism.

3. The system for testing expansive force on the basis of the contact surface of high polymer and the concrete pipeline as claimed in claim 2, wherein the supporting structure comprises a front baffle plate and a rear baffle plate which are arranged on the base and have preset intervals, and two side baffle plates fixedly connected between the front baffle plate and the rear baffle plate.

4. The system for testing the expansive force on the contact surface of the high polymer and the concrete pipeline according to claim 3, further comprising a top plate for fixing the front baffle plate, the rear baffle plate and the two side baffle plates respectively, wherein each top plate is correspondingly provided with an observation hole or a grouting hole.

5. The system for testing the expansive force on the basis of the contact surface of the high polymer and the pipeline as claimed in claim 3 or 4, wherein the upper surfaces of the front and rear baffles are arc-shaped, and the size of each arc is matched with the size of the pipeline to be tested.

6. The system for testing expansive force on the contact surface of polymer and concrete pipe according to claim 5, wherein the inner side of each top plate is tangent to the circular arc-shaped edges of the front and rear baffle plates.

7. The system for testing expansive force on the contact surface of high polymer and concrete pipe according to claim 6, wherein the front and rear baffles are sealed with the pipe to be tested by a gasket.

8. The system for testing the expansive force on the basis of the contact surface of the high polymer and the concrete pipeline as claimed in claim 6 or 7, wherein the front and rear baffles are connected with ribbed plates provided with auxiliary supports, and each ribbed plate is arranged outside the filling cavity.

9. The system for testing expansive force on the contact surface of polymer and concrete pipe according to claim 8, wherein said cross beam is adjustably connected with a bracket.

10. The system for testing the expansive force on the contact surface of the high polymer and the concrete pipeline according to claim 9, wherein at least one jack loader and a stress sensor arranged at the lower end of each jack loader are connected to the counter force loading mechanism.