CN105300721A - Anti-earth-bearing test device of quasi-rectangular shield heading machine and test method thereof - Google Patents
Anti-earth-bearing test device of quasi-rectangular shield heading machine and test method thereof Download PDFInfo
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- CN105300721A CN105300721A CN201510794195.6A CN201510794195A CN105300721A CN 105300721 A CN105300721 A CN 105300721A CN 201510794195 A CN201510794195 A CN 201510794195A CN 105300721 A CN105300721 A CN 105300721A
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Abstract
The invention relates to an anti-earth-bearing test device of a quasi-rectangular shield heading machine and a test method thereof. The test device comprises a working well, a test simulation shield tail, a test simulation pipe sheet and a propelling jack. The working well comprises a front hole door, a back hole door and a soil body structure arranged between the front hole door and the back hole door. The test simulation shield tail is embedded in the soil body structure. A plurality of grout injecting openings are arranged in the outer surface of the test simulation shield tail. The head of the test simulation pipe sheet stretches into the test simulation shield tail, and the tail of the test simulation pipe sheet is fixedly connected with the back hole door. The propelling jack is supported between the front end face of the test simulation pipe sheet and the front end of the test simulation shield tail so as to propel the test simulation shield tail to move towards the front hole door. In the anti-earth-bearing test of the shield heading machine, multiple grout injecting openings are arranged in the test simulation shield tail, so pressure of antifriction slurry liquid can be adjusted, a better grout injecting scheme of the antifriction slurry liquid can be obtained depending on the adjustment of the grout injecting positions, and actual construction can be well guided.
Description
Technical field
The present invention relates to Tunnel Engineering technical field, refer in particular to the native testing equipment of the anti-back of the body of kind rectangular shield development machine and a test method thereof.
Background technology
Shield excavation machine back of the body soil, namely due to earth viscosity and soil pressure effect, earth adheres to shield excavation machine outside surface, and earth and machine cannot depart from and follow a kind of phenomenon that machine advances jointly.Carry on the back native phenomenon and can cause shield excavation machine surrounding soil serious disturbance, and surface uplift may be caused or subside, construction area earth's surface and surface buildings are caused to having a strong impact on.Traditional circular shield machine, because its surface is circular, not easily produce the native phenomenon of the back of the body, but class rectangular shield development machine is flat shape due to its back shield shell, is therefore easy to produce the native phenomenon of the back of the body at its shield shell place, back.In current shield tunnel construction, mainly by offering grouting hole at shield excavation machine outside surface, and the method injecting antifriction slurries prevents the generation of carrying on the back native phenomenon.But because shield machine cross section is different, its effect injecting antifriction slurries cannot be predicted, therefore need a kind of anti-back of the body native effect of the native testing equipment of the anti-back of the body of shield excavation machine to shield excavation machine of same cross-sectional shape to test, to ensure the security of shield excavation machine in constructing tunnel.
Summary of the invention
The object of the invention is to the defect overcoming prior art, the one native testing equipment of the anti-back of the body of kind rectangular shield development machine and test method thereof is provided, solves the problem cannot predicting the effect injecting antifriction slurries when existing class rectangular shield development machine adopts surface imp lantation antifriction slurries to prevent from carrying on the back native phenomenon.
The technical scheme realizing above-mentioned purpose is:
The native testing equipment of the present invention one kind anti-back of the body of rectangular shield development machine, comprising:
Active well, the soil structures comprising front portal, rear portal and be located between described front portal and described rear portal;
Be embedded in the test simulation shield tail in described soil structures, the outside surface of described test simulation shield tail offers a plurality of grouting port;
Test simulation section of jurisdiction, head stretches in described test simulation shield tail, and afterbody and described rear portal are connected and fixed; And
Advance lifting jack, prop up and be located between the front end face of described test simulation section of jurisdiction and the front end of described test simulation shield tail, to advance portal jacking before described in described test simulation shield Caudad.
Test simulation shield tail is adopted to imitate the shield tail of shield excavation machine, in the test of shield excavation machine anti-back of the body soil, by offering a plurality of grouting port on test simulation shield tail, can not only adjust the pressure of antifriction slurries, the grouting program adjustment of slip casting position being obtained to preferably antifriction slurries can also be relied on, to practice of construction, there is good directive function.
The further improvement of the native testing equipment of the anti-back of the body of class rectangular shield development machine of the present invention is, described grouting port is arranged along described test simulation shield tail periphery, and grouting port described in each is communicated with a Grouting Pipe, injects antifriction slurries by described Grouting Pipe.
The further improvement of the native testing equipment of the anti-back of the body of class rectangular shield development machine of the present invention is, described rear portal place is provided with mounting flange, and described mounting flange connects the afterbody of described test simulation section of jurisdiction.
The further improvement of the native testing equipment of the anti-back of the body of class rectangular shield development machine of the present invention is, is inserted with multiple deviational survey sedimentation pipe in described soil structures, to monitor the disturbance situation of the soil body in described test simulation shield tail jack-in process; Described soil structures surface is also laid with surface displacement meter.
The further improvement of the native testing equipment of the anti-back of the body of class rectangular shield development machine of the present invention is, be provided with shield ventral brush between the rear portion of described test simulation shield tail and described test simulation section of jurisdiction, described shield ventral brush is located at the rear of described grouting port.
The test method of the native testing equipment of the present invention one kind anti-back of the body of rectangular shield development machine, comprising:
Excacation well, banket in the middle part of described active well to setting absolute altitude to form soil structures, the front of described soil structures and rear are formed with front portal and rear portal respectively;
Banket in described active well in process, test simulation shield tail and test simulation section of jurisdiction are imbedded in soil structures, wherein: the outside surface of described test simulation shield tail offers a plurality of grouting port, the head of described test simulation section of jurisdiction stretches in described test simulation shield tail, afterbody and described rear portal are connected and fixed, and install propelling lifting jack between the front end of the front end face in described test simulation section of jurisdiction and described test simulation shield tail;
Advance portal jacking before described in described test simulation shield Caudad by described propelling lifting jack, in described test simulation shield tail jack-in process, control grouting pressure by described grouting port and monitor soil disturbance situation to obtain grouting program.
The further improvement of the test method of the native testing equipment of the anti-back of the body of class rectangular shield development machine of the present invention is, is communicated with a Grouting Pipe, is realized the control of grouting pressure by described Grouting Pipe in grouting port place described in each.
The further improvement of the test method of the native testing equipment of the anti-back of the body of class rectangular shield development machine of the present invention is, arranges mounting flange, described test simulation section of jurisdiction is connected described mounting flange in described rear portal place.
The further improvement of the test method of the native testing equipment of the anti-back of the body of class rectangular shield development machine of the present invention is, plugs multiple deviational survey sedimentation pipe in described soil structures, to monitor the disturbance situation of the soil body in described test simulation shield tail jack-in process;
Surface displacement meter is laid to monitor surface displacement in described soil structures surface.
The further improvement of the test method of the native testing equipment of the anti-back of the body of class rectangular shield development machine of the present invention is, arranges shield ventral brush, described shield ventral brush is located at the rear of described grouting port between the rear portion and described test simulation section of jurisdiction of described test simulation shield tail.
Accompanying drawing explanation
Fig. 1 is the side sectional view of the native testing equipment of the anti-back of the body of class rectangular shield development machine of the present invention.
Fig. 2 is the cross-section structural representation of test simulation shield tail and test simulation section of jurisdiction in the native experimental facilities of the anti-back of the body of class rectangular shield development machine of the present invention.
Embodiment
Below in conjunction with the drawings and specific embodiments, the invention will be further described.
The invention provides the native testing equipment of the anti-back of the body of a kind of class rectangular shield development machine of the present invention and test method thereof, test simulation shield tail and the shape of test simulation section of jurisdiction are set to identical with class rectangular shield development machine cross sectional shape, by advancing the jacking in the soil body of lifting jack propulsion trial simulation shield tail, and the grouting port by test simulation shield tail is offered in jack-in process injects antifriction slurries, advance the progradation of shield excavation machine in the propelling simulation practice of construction of jack pair test simulation shield tail, pass through to control grouting pressure and adjustment slip casting position in the injection process of antifriction slurries, coordinate the disturbance situation of the monitoring soil body, determine the native effect of the anti-back of the body of antifriction slurries, best grouting program can be obtained, to instruct Practical Project.Below in conjunction with accompanying drawing, the native testing equipment of the anti-back of the body of class rectangular shield development machine of the present invention and test method thereof are described.
Consult Fig. 1, show the side sectional view of the native testing equipment of the anti-back of the body of class rectangular shield development machine of the present invention.Below in conjunction with Fig. 1, the native testing equipment of the anti-back of the body of class rectangular shield development machine of the present invention is described.
As shown in Figure 1, the native testing equipment of the anti-back of the body of class rectangular shield development machine of the present invention comprises active well 11, test simulation shield tail 12, test simulation section of jurisdiction 13 and advances lifting jack 14, the native testing equipment of this anti-back of the body is intended to the tunneling process of simulating class rectangular shield development machine, reduced scale simulation is carried out to class rectangular shield development machine, utilizes large-scale active well 11 to carry out the test of shield excavation machine anti-back of the body soil.
The soil structures 113 that active well 11 comprises front portal 111, rear portal 112 and is located between front portal 111 and rear portal 112.This active well 11 excavates according to the size of setting, and then in the middle part of the active well 11 backfill soil body, tamps to form soil structures 113 to the soil body of backfill.
Test simulation shield tail 12 is embedded in soil structures 113, this test simulation shield tail 12 is class square-section, a plurality of grouting port 121 is offered at the outside surface of test simulation shield tail 12, antifriction slurries are injected into the outside surface of test simulation shield tail 12 from grouting port 121, this grouting port 121 lays several along the outside surface surrounding of test simulation shield tail 12, in the process of carrying out slip casting, the grouting port 121 of diverse location can be selected to carry out slip casting, to realize the adjustment to slip casting position.
The head of test simulation section of jurisdiction 13 extend in test simulation shield tail 12, afterbody and rear portal 112 are connected and fixed, this test simulation section of jurisdiction 13 is connected to form for more piece tube coupling, this test simulation section of jurisdiction 13 part extend in test simulation shield tail 12, part is embedded in soil structures 113, and the cross section of test simulation section of jurisdiction 13 is also class rectangular configuration.Be installed with mounting flange 115 at rear portal 112 place, test simulation section of jurisdiction 13 is fixed on mounting flange 115, is fixed test simulation section of jurisdiction 13 by mounting flange 115.
Lifting jack 14 is advanced to be located between the head of test simulation section of jurisdiction 13 and test simulation shield tail 12, lifting jack 14 is advanced to be supported in the front end of test simulation shield tail 12 and the front end face of tentative module section of jurisdiction 13, one end of this propelling lifting jack 14 install be fixed on test simulation shield tail 12 front end medial surface on, because test simulation section of jurisdiction 13 is fixed on rear portal 112, by advancing the propelling of lifting jack 14, make the direction jacking of test simulation shield tail 12 portal 111 forward.Advance lifting jack 14 quantity to be some, be arranged on the front end of test simulation section of jurisdiction 13.
In the jack-in process of test simulation shield tail 12, by selecting opening and closing the slip casting position adjusting antifriction slurries of grouting port 121, control the grouting pressure that each grouting port 121 injects antifriction slurries, coordinate the disturbance situation of monitoring soil structures, pass through simulation test, the native effect of the anti-back of the body of antifriction slurries can be determined, obtain best grouting program, construct to instruct Practical Project.
In soil structures 113, being inserted with multiple deviational survey sedimentation pipe 114, for measuring inclination and the sedimentation situation of soil structures 113, realizing the disturbance situation of the monitoring soil body.This deviational survey sedimentation pipe 114 is inserted in surrounding and the top of test simulation shield tail 12, more comprehensively monitoring soil disturbance situation.Surface displacement meter is laid with, monitoring surface displacement situation on the surface of soil structures 113.
Be provided with portal circumference joint 116 at front portal 111 place, the cross section of this portal circumference joint 116 is class rectangle, and portal circumference joint 116 is for acceptance test simulation shield tail 12.Received well in the corresponding actual condition of front portal 111, the starting well in the corresponding actual condition of rear portal 112.
Shown in composition graphs 2, the inwall of test simulation shield tail 12 is provided with multiple Grouting Pipe 122, Grouting Pipe 122 can be fixed by welding on test simulation shield tail 12, the quantity of the corresponding grouting port 121 of quantity of Grouting Pipe 122, each grouting port 121 is communicated with a Grouting Pipe 122, not connected between each Grouting Pipe 122, each Grouting Pipe 122 is grouting port 121 slip casting corresponding separately, antifriction slurries via Grouting Pipe 122 pumping, then are expelled to the outside surface of test simulation shield tail 12 from grouting port 121.
Between the rear portion and test simulation section of jurisdiction 13 of test simulation shield tail 12, be provided with shield ventral brush 123, shield ventral brush 123 is located at the rear of grouting port 121, and this shield ventral brush 123 arranges twice, plays sealing function between test simulation shield tail 12 and test simulation section of jurisdiction 13.
The grouting pump of Grouting Pipe 122 arranges pressure gauge, by pressure gauge monitor and forecast grouting pressure.
When using the native testing equipment of the anti-back of the body of class rectangular shield development machine of the present invention to test, the height of the soil structures 113 in this equipment can adjust according to actual condition, guarantee that testing the result drawn is more suitable for actual condition, improve the accuracy of test findings.
When utilizing this testing equipment to test, first select some in Grouting Pipe 122 slip castings carrying out antifriction slurries, by the shutoff of remaining Grouting Pipe 122 mouth of pipe, between antifriction slurries injection test simulation shield tail 12 and the soil body, after the surface of contact top layer soil body is infiltrated, start and advance lifting jack 14, test simulation shield tail 12 is advanced, grouting pressure can be controlled in propelling, monitor soil disturbance data simultaneously, and each Grouting Pipe 122 arranges separately and is not communicated with mutually, arbitrarily can adjust concrete slip casting position, the native effect of the anti-back of the body of antifriction slurries can be determined by test, best grouting program can be obtained.
Below the test method of the native testing equipment of the present invention one kind anti-back of the body of rectangular shield development machine is described.
As shown in Figure 1, the test method of the native testing equipment of the anti-back of the body of the present invention one kind rectangular shield development machine comprises:
Excacation well 11, large-scale active well 11 can be designed, meet the simulation to class rectangular shield development machine, banket at the middle part of active well 11 to setting absolute altitude to form soil structures 113, portal 111 before the front of soil structures 113 is formed, portal 112 after the rear of soil structures 113 is formed, the setting absolute altitude of soil structures 113 can increase and decrease according to actual condition, guarantee that testing the result drawn is more suitable for actual condition, improve the accuracy of test findings;
In the process of backfill soil, in the lump test simulation shield tail 12 and test simulation section of jurisdiction 13 are imbedded in soil structures 113, banket in active well 11 and stop banketing to the setting height(from bottom) of test simulation shield tail 12, installation test simulation shield tail 12 and test simulation section of jurisdiction 13, the afterbody of test simulation section of jurisdiction 13 is fixed on rear portal 112, the outside surface of test simulation shield tail 12 offers a plurality of grouting port 121, antifriction slurries are injected into the outside surface of test simulation shield tail 12 from grouting port 121, this grouting port 121 lays several along the outside surface surrounding of test simulation shield tail 12, in the process of carrying out slip casting, the grouting port 121 of diverse location can be selected to carry out slip casting, to realize the adjustment to slip casting position.The head of test simulation section of jurisdiction 13 extend in test simulation shield tail 12, front end face in test simulation section of jurisdiction 13 is installed and is advanced lifting jack 14, this propelling lifting jack 14 is located between the front end face of test simulation section of jurisdiction 13 and the front end of test simulation shield tail 12, the other end of this propelling lifting jack 14 installs the medial surface being fixed on test simulation shield tail 12 front end, by advancing lifting jack 14 propulsion trial simulation shield tail 12.Portal circumference joint 14 is installed, for acceptance test simulation shield tail 12 at front portal 111 place.Test simulation shield tail 12 and test simulation section of jurisdiction 13 all rely on banketing of below and support its setting height(from bottom), need tamping in layers in process of banketing.After the installation of finishing equipment, continue to banket to active well 11, until reach predetermined altitude, then in tamping in layers.
In the soil structures 113 formed, suitably monitoring equipment is set, is included in soil structures 113 and plugs multiple deviational survey sedimentation pipe 114, lay surface displacement meter on the surface of soil structures 113, to monitor soil disturbance situation in real time.
Be installed with mounting flange 115 at rear portal 112 place, test simulation section of jurisdiction 13 is fixed on mounting flange 115, is fixed test simulation section of jurisdiction 13 by mounting flange 115.
Shown in composition graphs 2, the inwall of test simulation shield tail 12 is provided with multiple Grouting Pipe 122, Grouting Pipe 122 can be fixed by welding on test simulation shield tail 12, the quantity of the corresponding grouting port 121 of quantity of Grouting Pipe 122, each grouting port 121 is communicated with a Grouting Pipe 122, not connected between each Grouting Pipe 122, each Grouting Pipe 122 is grouting port 121 slip casting corresponding separately, antifriction slurries via Grouting Pipe 122 pumping, then are expelled to the outside surface of test simulation shield tail 12 from grouting port 121.
Between the rear portion and test simulation section of jurisdiction 13 of test simulation shield tail 12, be provided with shield ventral brush 123, shield ventral brush 123 is located at the rear of grouting port 121, and this shield ventral brush 123 arranges twice, plays sealing function between test simulation shield tail 12 and test simulation section of jurisdiction 13.
The grouting pump of Grouting Pipe 122 arranges pressure gauge, by pressure gauge monitor and forecast grouting pressure.
When testing, select some in Grouting Pipe 122 slip castings carrying out antifriction slurries, and the mouth of pipe plug of remaining Grouting Pipe 12 is blocked, antifriction slurries inject the gap of the soil body and test simulation shield tail 12 by Grouting Pipe 122, after contact veneer of soil body is infiltrated, start and promote lifting jack 14, test simulation shield tail 12 is advanced, can grouting pressure be controlled in propelling, and monitor soil disturbance data.
The beneficial effect of the native testing equipment of the anti-back of the body of class rectangular shield development machine of the present invention and test method thereof is:
It, in the test of shield excavation machine anti-back of the body soil, can not only adjust the pressure of antifriction slurries, can also rely on the grouting hole that simulation shield tail outside surface surrounding arranges and adjust concrete slip casting position, to obtain best antifriction slurries grouting program.
This testing equipment is furnished with some grouting ports in the outside surface surrounding of test simulation shield tail, and be that each grouting port is provided with independent mutual disconnected Grouting Pipe at the inwall of simulation shield tail, concrete slip casting position can be adjusted, also can adjust grouting pressure separately simultaneously, by the monitoring to soil disturbance, determine the native effect of the anti-back of the body of antifriction slurries, to obtain best grouting program.
Below embodiment is to invention has been detailed description by reference to the accompanying drawings, and those skilled in the art can make many variations example to the present invention according to the above description.Thus, some details in embodiment should not form limitation of the invention, the present invention by the scope that defines using appended claims as protection scope of the present invention.
Claims (10)
1. the native testing equipment of the anti-back of the body of kind rectangular shield development machine, is characterized in that, comprising:
Active well, the soil structures comprising front portal, rear portal and be located between described front portal and described rear portal;
Be embedded in the test simulation shield tail in described soil structures, described test simulation shield tail offers a plurality of grouting port;
Test simulation section of jurisdiction, head stretches in described test simulation shield tail, and afterbody and described rear portal are connected and fixed; And
Advance lifting jack, prop up and be located between the front end face of described test simulation section of jurisdiction and the front end of described test simulation shield tail, to advance portal jacking before described in described test simulation shield Caudad.
2. the native testing equipment of the anti-back of the body of class rectangular shield development machine as claimed in claim 1, it is characterized in that, described grouting port is arranged along described test simulation shield tail periphery, and grouting port described in each is communicated with a Grouting Pipe, injects antifriction slurries by described Grouting Pipe.
3. the native testing equipment of the anti-back of the body of class rectangular shield development machine as claimed in claim 1 or 2, it is characterized in that, described rear portal place is provided with mounting flange, and described mounting flange connects the afterbody of described test simulation section of jurisdiction.
4. the native testing equipment of the anti-back of the body of class rectangular shield development machine as claimed in claim 1, is characterized in that, be inserted with multiple deviational survey sedimentation pipe in described soil structures, to monitor the disturbance situation of the soil body in described test simulation shield tail jack-in process; Described soil structures surface is also laid with surface displacement meter.
5. the native testing equipment of the anti-back of the body of class rectangular shield development machine as claimed in claim 1, it is characterized in that, be provided with shield ventral brush between the rear portion of described test simulation shield tail and described test simulation section of jurisdiction, described shield ventral brush is located at the rear of described grouting port.
6. the test method of the native testing equipment of the anti-back of the body of kind rectangular shield development machine, is characterized in that, comprising:
Excacation well, banket in the middle part of described active well to setting absolute altitude to form soil structures, the front of described soil structures and rear are formed with front portal and rear portal respectively;
Banket in described active well in process, test simulation shield tail and test simulation section of jurisdiction are imbedded in soil structures, wherein: described test simulation shield tail offers a plurality of grouting port, the head of described test simulation section of jurisdiction stretches in described test simulation shield tail, afterbody and described rear portal are connected and fixed, and install propelling lifting jack between the front end of the front end face in described test simulation section of jurisdiction and described test simulation shield tail;
Advance portal jacking before described in described test simulation shield Caudad by described propelling lifting jack, in described test simulation shield tail jack-in process, control grouting pressure by described grouting port and monitor soil disturbance situation to obtain grouting program.
7. the test method of the native testing equipment of the anti-back of the body of class rectangular shield development machine as claimed in claim 6, be is characterized in that, be communicated with a Grouting Pipe, realized the control of grouting pressure by described Grouting Pipe in grouting port place described in each.
8. the test method of the native testing equipment of the anti-back of the body of class rectangular shield development machine as claimed in claims 6 or 7, is characterized in that, arrange mounting flange, described test simulation section of jurisdiction is connected described mounting flange in described rear portal place.
9. the test method of the native testing equipment of the anti-back of the body of class rectangular shield development machine as claimed in claim 6, is characterized in that, plug multiple deviational survey sedimentation pipe in described soil structures, to monitor the disturbance situation of the soil body in described test simulation shield tail jack-in process;
Surface displacement meter is laid to monitor surface displacement in described soil structures surface.
10. the test method of the native testing equipment of the anti-back of the body of class rectangular shield development machine as claimed in claim 6, it is characterized in that, shield ventral brush is set between the rear portion and described test simulation section of jurisdiction of described test simulation shield tail, described shield ventral brush is located at the rear of described grouting port.
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| CN201510794195.6A CN105300721B (en) | 2015-11-18 | 2015-11-18 | The native testing equipment of the anti-back of the body of class rectangle shield excavation machine and its test method |
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| CN201510794195.6A CN105300721B (en) | 2015-11-18 | 2015-11-18 | The native testing equipment of the anti-back of the body of class rectangle shield excavation machine and its test method |
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