CN217358824U - Large-section rectangular jacking pipe frictional resistance testing system - Google Patents
Large-section rectangular jacking pipe frictional resistance testing system Download PDFInfo
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- CN217358824U CN217358824U CN202221211244.0U CN202221211244U CN217358824U CN 217358824 U CN217358824 U CN 217358824U CN 202221211244 U CN202221211244 U CN 202221211244U CN 217358824 U CN217358824 U CN 217358824U
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Abstract
The utility model discloses a big section rectangle push pipe frictional resistance test system belongs to tunnel construction technical field, and this test system includes proof box, rectangle push pipe test piece, loading module, metering module and slip casting module. Through the setting to loading module, proof box, rectangle push pipe test piece and slip casting module, realize the simulation to the process of jacking of construction area rectangle push pipe test piece, in addition through the setting of metering module, can accurately acquire rectangle push pipe test piece under antifriction mud effect, the change law of the frictional force of its tube coupling side direction provides reliable foundation for follow-up push pipe actual work progress. The construction is smoother, the construction period is shorter, the construction efficiency is higher, the construction cost is reduced, and the construction quality is improved. The problem of the big section rectangle push pipe construction in the past can't direct accurate definite push pipe frictional resistance size is solved.
Description
Technical Field
The utility model belongs to the technical field of tunnel construction, a rectangle push pipe frictional resistance test system is related to, especially a big section rectangle push pipe frictional resistance test system.
Background
The rectangular pipe jacking method has the characteristics of simplicity and convenience in construction, small ground disturbance, environmental friendliness and the like, and is widely applied to underground projects such as subway stations, subway entrances and exits, pedestrian street-crossing passages, underground comprehensive pipe galleries and the like; meanwhile, the rectangular pipe jacking technology is developed towards the complicated direction of large section, long distance, extremely small distance, ultra-shallow burying and stratum crossing; the shallow rectangular jacking pipe has the advantages that the total frictional resistance around the pipe joints is larger and larger along with the increase of the jacking distance in the jacking process, and the construction progress and the construction quality are seriously influenced. To solve this problem, it is necessary to inject a slurry material, called "friction reducing slurry", on the outer surface of the pipe joint. A layer of mud layer can be formed between the periphery of the pipe joint and a soil body through full and uniform grouting of the antifriction mud, so that the pipe joint is jacked in the mud, and jacking resistance is greatly reduced; meanwhile, the device can play a role in supporting soil and controlling ground settlement.
Although antifriction slurry is injected between the soil layer and the jacking pipe, the friction force between the jacking pipe and the antifriction slurry can be changed constantly due to the influence of various factors such as the material of the jacking pipe, the proportion of the antifriction slurry, the soil quality and the like, so that the construction process is difficult, the construction difficulty is increased, and the construction progress is influenced.
Therefore, whether the friction resistance of the jacking pipe can be accurately determined is an important index for measuring the jacking efficiency and the quality safety. At present, most of the determination of the pipe joint side friction of the jacking pipe in jacking construction is obtained according to a theoretical calculation method or some empirical data, and an accurate data basis cannot be obtained. Therefore, for reasonably determining the frictional resistance of the jacking pipe in the jacking pipe construction process, a device capable of directly and accurately testing the lateral friction force of the pipe joint in the jacking process of the jacking pipe is urgently needed, so that the lateral friction force of the pipe joint can be reasonably estimated in the jacking process of the jacking pipe under the action of antifriction mud, and a reasonable basis is provided for subsequent construction.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to solve the problem among the prior art, provide a big section rectangle push pipe frictional resistance test system, this system can accurately detect push pipe tube coupling side direction frictional force, provides accurate foundation for follow-up construction.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
the utility model provides a large-section rectangular top pipe frictional resistance testing system, which comprises a test box, a rectangular top pipe test piece, a loading module, a grouting module and a metering module; through holes are correspondingly formed in the vertical side walls of the input end and the output end of the test box; one end of the rectangular top pipe test piece is connected with the loading module, the other end of the rectangular top pipe test piece is inserted into the test box through the through hole, and a plurality of grouting holes are formed in the rectangular top pipe test piece; the grouting hole is connected with the grouting module through a grouting pipe inserted in the rectangular top pipe test piece; the metering module is electrically or communicatively connected with the loading module and the test box.
Preferably, the through holes of the input end and the output end of the test box are respectively connected with a limiting pipe, and the inner periphery of the limiting pipe is larger than the periphery of the rectangular top pipe test piece and is used for providing guidance for jacking of the rectangular top pipe test piece.
Preferably, an angle steel is arranged between the limiting pipe and an included angle of the outer wall of the test box.
Preferably, the system further comprises a control module, and the control module is electrically or communicatively connected with the loading module, the metering module and the grouting module.
Preferably, a control valve is arranged on a grouting pipe between the grouting hole and the grouting module, and the control valve is electrically or communicatively connected with the control module.
Preferably, the loading module comprises a plurality of jacks and a reaction frame, the jacking heads of the jacks are connected with the rectangular jacking pipe test piece, and the bottom ends of the jacks are fixed on the reaction frame; and the jack is in communication connection or electric connection with the metering module and the control module.
Preferably, the metering module comprises a pressure ring and a static strain gauge, and the pressure ring is connected with the loading module and is electrically or communicatively connected with the static strain gauge and the control module; and the static strain gauge is electrically or communicatively connected with the control module.
Preferably, the grouting module comprises a grouting pump and a slurry storage pool, and the grouting pump is arranged in the slurry storage pool and is connected with a grouting hole arranged on the rectangular jacking pipe test piece through a grouting pipe; the grouting pump is in communication connection or electric connection with the control module.
Preferably, the grouting pump is connected with a pressure gauge, and the pressure gauge is electrically connected or in communication connection with the control module.
Preferably, the material of the test box is organic glass.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model provides a big section rectangle push pipe frictional resistance test system, this system realize the simulation of the process of advancing in construction area rectangle push pipe through the setting to loading module, proof box and slip casting module, in addition through the setting of metering module, can accurately acquire rectangle push pipe test piece under antifriction mud effect, the change law of the frictional force of its tube coupling side direction provides reliable foundation for follow-up push pipe actual work progress. The construction is smoother, the construction period is shorter, the construction efficiency is higher, the construction cost is reduced, and the construction quality is improved. The problem of can't directly confirm push pipe frictional resistance size accurately in the construction of big section rectangle push pipe at present is solved.
Secondly, the utility model discloses a control module's setting realizes reducing the error that artificial participation factor brought to the on-line control of whole measurement system, not only can improve the measurement accuracy of real individual system, but also can improve measurement of efficiency, reduces operator's intensity of labour.
Finally, the test box is made of organic glass, so that the diffusion thickness, diffusion effect and complete set effect of the antifriction slurry in the whole construction jacking simulation process can be monitored, and subsequent adjustment is facilitated.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention, and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.
FIG. 1 is the structural diagram of the large-section rectangular push pipe frictional resistance testing system of the present invention.
Wherein: the method comprises the following steps of 1-a test box, 2-a rectangular pipe jacking test piece, 3-a limiting pipe, 4-a grouting hole, 5-a rubber cover plate, 6-a pressure ring, 7-a jack, 8-a reaction frame, 9-a static strain gauge, 10-a computer, 11-a grouting pump, 12-a pressure gauge, 13-a slurry storage tank, 14-antifriction slurry, 15-a control valve and 16-a grouting pipe. The device comprises 17-angle steel, 18-supporting frames, an A-control module, a B-loading module, a C-grouting module and a D-metering module.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the embodiments of the present invention, it should be noted that, if the terms "upper", "lower", "horizontal", "inner", etc. indicate the orientation or position relationship based on the orientation or position relationship shown in the drawings, or the orientation or position relationship that the product of the present invention is usually placed when in use, the description is only for convenience of description and simplification, but the indication or suggestion that the device or element to be referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be interpreted as limiting the present invention. Furthermore, the terms "first," "second," and the like are used merely to distinguish one description from another, and are not to be construed as indicating or implying relative importance.
Furthermore, the term "horizontal", if present, does not mean that the component is required to be absolutely horizontal, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the embodiments of the present invention, it should be further noted that unless explicitly stated or limited otherwise, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1, the utility model provides a large-section rectangular pipe jacking frictional resistance test system, which comprises a test box 1 for simulating the field construction environment, wherein the test box 1 is made of organic glass and is connected with a control module a, and the control module a is a computer 10; through holes are correspondingly formed in the vertical side walls of the input end and the output end of the test box 1; a rectangular jacking pipe test piece 2 is inserted in a through hole at the input end of the test box 1, the rectangular jacking pipe test piece 2 is connected with a loading module B, the loading module B comprises a plurality of jacks 7 and a reaction frame 8, the jacks 7 provide jacking power for the rectangular jacking pipe test piece 2, the reaction frame 8 is used for simulating a reaction wall of a jacking well, the top head of each jack 7 is connected with the rectangular jacking pipe test piece 2, the bottom end of each jack 7 is connected with the reaction frame 8, the jacks 7 are electrically connected or communicatively connected with a metering module D, each metering module D comprises a pressure ring 6 and a static strain gauge 9 and is used for transmitting the friction force outside a pipe joint when the rectangular jacking pipe test piece 2 jacks, the pressure ring 6 is electrically connected with the jacks 7 and the static strain gauges 9, and the static strain gauges 9 are electrically connected or communicatively connected with a computer 10 of the control module A; the rectangular pipe-jacking test piece 2 is provided with a plurality of grouting holes 4, the grouting holes 4 are connected with a grouting module C through grouting pipes 16 inserted in the rectangular pipe-jacking test piece 2, the grouting module C comprises a grouting pump 11 and a slurry storage tank 13, the slurry storage tank 13 is used for storing antifriction slurry 14, the grouting pump 11 is arranged in the slurry storage tank 13 and is connected with a pressure gauge 12, and the output end of the grouting pump 11 is connected with the grouting holes 4 through the grouting pipes 16; and a control valve 5 is arranged on a grouting pipe 16 between the grouting hole 4 and the grouting module C, and the control valve 5 is electrically or communicatively connected with the control module A and used for accurately controlling the grouting amount at any time.
Particularly, through holes at the input end and the output end of the test box 1 are respectively connected with a limiting pipe 3, the limiting pipe 3 is a steel pipe, the inner periphery of the limiting pipe is larger than the periphery of the rectangular top pipe test piece 2, and the limiting pipe 3 is used for providing guidance for jacking the rectangular top pipe test piece 2. An angle steel 17 is arranged between the included angle between the limiting tube 3 and the outer wall of the test box 1 and used for ensuring that the limiting tube 3 is in a right angle with the outer wall of the test box 1 and supporting the limiting tube 3. And a rubber cover plate 4 is arranged at a through hole at the input end of the test box 1 and is used for sealing and waterproofing the test box 1. And support frames 18 are respectively arranged below the jack 7 and the rectangular top pipe test piece 2 and used for supporting the jack and the rectangular top pipe test piece 2 and keeping the jack and the rectangular top pipe test piece 2 on the same horizontal plane.
During the use, install spacing pipe 13 in the through-hole of proof box 1 input and output, for rectangle push pipe test piece 2 provides space and the direction of advancing. And (3) placing the rectangular top pipe test piece 2 into a limiting pipe 13 at the input end of the test box 1. A simulated soil body to be researched is configured in the test box 1 to simulate the soil layer condition of a construction site, and the rectangular top pipe test piece 2 is in contact with the simulated soil body. The computer 10 is used for controlling, the jack 7 is used for pressurizing, so that the rectangular jacking pipe test piece 2 is jacked forwards, the numerical value read out by the static strain gauge 31 is observed at any time in the pressurizing process, namely the frictional resistance, and the numerical value is transmitted to the control module A. And starting a grouting pump 11, injecting antifriction slurry in a slurry storage tank 13 between the rectangular top pipe test piece 2 and the soil body through a grouting hole 4, observing a pressure gauge 12, and controlling the flow rate and the grouting pressure of the slurry by using a computer 10 to control a control valve 15.
The system can test the pipe side friction resistance and the friction reducing effect of different types of friction reducing slurry under different soil body conditions by changing different simulated soil bodies 1, provides effective basis and technical support for subsequent construction, obtains an optimal construction scheme, and improves the construction efficiency and the construction quality.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. A large-section rectangular top pipe frictional resistance test system is characterized by comprising a test box (1), a rectangular top pipe test piece (2), a loading module (B), a grouting module (C) and a metering module (D); through holes are correspondingly formed in the vertical side walls of the input end and the output end of the test box (1); one end of the rectangular top pipe test piece (2) is connected with the loading module (B), the other end of the rectangular top pipe test piece is inserted into the test box (1) through the through hole, and a plurality of grouting holes (4) are formed in the rectangular top pipe test piece (2); the grouting hole (4) is connected with a grouting module (C) through a grouting pipe (16) inserted into the rectangular top pipe test piece (2); the metering module (D) is electrically or communicatively connected with the loading module (B) and the test box (1).
2. The large-section rectangular top pipe frictional resistance test system according to claim 1, wherein the through holes of the input end and the output end of the test box (1) are respectively connected with a limiting pipe (3), and the inner periphery of the limiting pipe (3) is larger than the periphery of the rectangular top pipe test piece (2) and used for providing guidance for jacking of the rectangular top pipe test piece (2).
3. The large-section rectangular jacking pipe frictional resistance testing system according to claim 2, wherein an angle steel (17) is arranged between the limiting pipe (3) and the outer wall of the test box (1).
4. The large-section rectangular jacking pipe frictional resistance testing system according to claim 1, further comprising a control module (A), wherein the control module (A) is electrically connected or in communication connection with the loading module (B), the metering module (D) and the grouting module (C).
5. The large-section rectangular jacking pipe frictional resistance testing system according to claim 4, wherein a control valve (15) is arranged on a grouting pipe (16) between the grouting hole (4) and the grouting module (C), and the control valve (15) is electrically or communicatively connected with the control module (A).
6. The large-section rectangular jacking pipe frictional resistance testing system according to claim 4, wherein the loading module (B) comprises a plurality of jacks (7) and a reaction frame (8), the top heads of the jacks (7) are connected with the rectangular jacking pipe test piece (2), and the bottom ends of the jacks are fixed on the reaction frame (8); the jack (7) is in communication connection or electric connection with the metering module (D) and the control module (A).
7. The large-section rectangular pipe jacking frictional resistance testing system according to claim 4, wherein the metering module (D) comprises a pressure ring (6) and a static strain gauge (9), the pressure ring (6) is connected with the loading module (B), and is electrically or communicatively connected with the static strain gauge (9) and the control module (A); the static strain gauge (9) is electrically or communicatively connected with the control module (A).
8. The large-section rectangular jacking pipe frictional resistance testing system according to claim 4, wherein the grouting module (C) comprises a grouting pump (11) and a slurry storage tank (13), the grouting pump (11) is arranged in the slurry storage tank (13) and is connected with a grouting hole (4) formed in the rectangular jacking pipe test piece (2) through a grouting pipe (16); the grouting pump (11) is in communication connection or electric connection with the control module (A).
9. The large-section rectangular jacking pipe frictional resistance testing system according to claim 8, wherein a pressure gauge (12) is connected to the grouting pump (11), and the pressure gauge (12) is electrically or communicatively connected with the control module (A).
10. The large-section rectangular pipe jacking frictional resistance testing system according to any one of claims 1-9, wherein the test box (1) is made of organic glass.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221211244.0U CN217358824U (en) | 2022-05-19 | 2022-05-19 | Large-section rectangular jacking pipe frictional resistance testing system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202221211244.0U CN217358824U (en) | 2022-05-19 | 2022-05-19 | Large-section rectangular jacking pipe frictional resistance testing system |
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| CN217358824U true CN217358824U (en) | 2022-09-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116718522A (en) * | 2023-08-09 | 2023-09-08 | 长江三峡集团实业发展(北京)有限公司 | Test device for measuring circumferential stress of pipe jacking pipe and use method |
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2022
- 2022-05-19 CN CN202221211244.0U patent/CN217358824U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116718522A (en) * | 2023-08-09 | 2023-09-08 | 长江三峡集团实业发展(北京)有限公司 | Test device for measuring circumferential stress of pipe jacking pipe and use method |
| CN116718522B (en) * | 2023-08-09 | 2023-10-20 | 长江三峡集团实业发展(北京)有限公司 | Test device for measuring circumferential stress of pipe jacking pipe and use method |
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