CN105043884A - Testing device for carrying capacity of comprehensive pipe gallery and pipe joint and application method - Google Patents
Testing device for carrying capacity of comprehensive pipe gallery and pipe joint and application method Download PDFInfo
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- CN105043884A CN105043884A CN201510528952.5A CN201510528952A CN105043884A CN 105043884 A CN105043884 A CN 105043884A CN 201510528952 A CN201510528952 A CN 201510528952A CN 105043884 A CN105043884 A CN 105043884A
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Abstract
The invention discloses a testing device for a carrying capacity of a comprehensive pipe gallery and pipe joint and an application method, and relates to a device for testing the carrying capacity of the urban underground comprehensive pipe gallery and pipe joint and an application method. The main structure of the testing device is composed of the comprehensive pipe gallery and pipe joint, a test rack, a vertical bearing plate, a vertical jack, a vertical slide groove, a horizontal bearing plate, a horizontal jack and a horizontal slide groove and the like; the device can be used for simultaneously performing a vertical load test and a horizontal load test of the comprehensive pipe gallery and pipe joint; the horizontal load test can reasonably and accurately simulate horizontal soil pressure and meets an actual stress condition of the comprehensive pipe gallery and pipe joint; the detection accuracy of testing the carrying capacity of the comprehensive pipe gallery and pipe joint is improved, and reasonable and correct utilization and structure safety of the comprehensive pipe gallery and pipe joint are ensured; the corresponding application method is combined so that assembling and utilization of the testing device can be finished very well; and therefore, the testing device has the advantages of simple structure, convenient utilization, reasonable method, reliable data and the like, and has relatively high economic benefits and social benefits.
Description
Technical field
The present invention relates to a kind of Urban Underground pipe gallery tube coupling load carrying capacity test field, refer in particular to Urban Underground pipe gallery tube coupling load carrying capacity test device and using method.
Background technology
China's Urban Underground has nearly 30 kinds of the seven large class pipelines such as feedwater, heating power, combustion gas, electric power, telecommunications, rainwater, sewage to adhere to different division management separately, State-level neither one is pipeline layout figure or database accurately, cause unit to construct to do things in his own way, occur the problems such as pipeline " is fought ", road excavates repeatedly unavoidably.Recently, country starts pay attention to and build the construction of Urban Underground pipe gallery comprehensively, concentrate in underground pipe gallery body by all pipelines, Daily Round Check and Maintains etc. are all completed in underground by well of coming in and going out, thus effectively solve " road slide fastener " problem, and piping erosion and quake evaluation can be resisted, pipeline performance also safety and stability more.Therefore, underground pipe gallery is built the situation of change urban construction in the past " on important place; lightly ", indicate the transformation of Urban Construction in China development pattern, open " the underground utilities revolution " of China, and far-reaching and active influence will be produced to all many-sides such as urban development, economic growth, the lives of the people.
At present, the more advanced construction mode of Urban Underground pipe gallery is, the pipe gallery tube coupling of prefabricated standard, assembled are installed and the non-standard structure cast-in-place construction such as pipeline outlet, ventilating opening, dog-house.Pipe gallery tube coupling belongs to important underground works, and structure stress is complicated, therefore all needs to do bearingtest, to guarantee construction quality before embedding underground.Existing pipe gallery tube coupling load test method can be summarized as two classes: one is merely do vertical bearing capacity test; Two is do vertical and horizontal bearing capacity test in laboratory, but horizontal bearing capacity test does not have the actual loading situation of reasonably analog synthesis piping lane tube coupling.The defect of above-mentioned two class test methods have impact on the accuracy of pipe gallery tube coupling load carrying capacity test detection all to a certain extent, and then causes reasonable employment and the structural safety of pipe gallery tube coupling.
Summary of the invention
The object of the invention is to overcome the defect of prior art and a kind of simple structure is provided, easy to use, method is reasonable, data reliable pipe gallery tube coupling load carrying capacity test device and using method.
Technical matters of the present invention is achieved through the following technical solutions:
A kind of pipe gallery tube coupling load carrying capacity test device, comprise test stand and be placed on the pipe gallery tube coupling in test stand, described pipe gallery tube coupling top is provided with vertical bearing plate, multiple vertical lifting jack is installed between vertical bearing plate with test stand inner top surface, it is for vertical movement that the plurality of vertical lifting jack promotes vertical bearing plate jointly, and drive vertical bearing plate to apply vertical test load to unload in the end face of pipe gallery tube coupling or the end face departing from pipe gallery tube coupling and exit test; Described pipe gallery tube coupling both sides are respectively equipped with land plate, between every block land plate and test stand medial surface, multiple level jack is all installed, the plurality of level jack jointly promotes land plate and moves horizontally, and drives land plate to apply hydraulic test load to unload in the side of pipe gallery tube coupling or the side departing from pipe gallery tube coupling and exit test; Geotextile is equipped with between described vertical bearing plate and the end face of pipe gallery tube coupling, between land plate and the side of pipe gallery tube coupling, between the bottom surface of pipe gallery tube coupling and the inner bottom surface of test stand.
Described pipe gallery tube coupling load carrying capacity test device has two vertical test loads
value and
individual hydraulic test load
~
value;
Two described vertical test loads
value and two vertical test loads
distance between value
and distance
determined by design,
for left vertical trial load
be worth the distance to pipe gallery tube coupling dividing plate center line,
for Right vertical trial load
be worth the distance to pipe gallery tube coupling dividing plate center line;
Described
individual hydraulic test load
~
value, wherein
for positive integer, described
individual hydraulic test load is determined by the method for pipe gallery tube coupling buried depth soil pressure equivalence, when pipe gallery tube coupling embedding place horizontal earth pressure along the Distribution Value curve of the degree of depth is
,
; The overall height of pipe gallery tube coupling end face to bottom surface is divided into
section, the height of every section calculates from pipe gallery tube coupling end face, then each section of horizontal earth pressure makes a concerted effort to be worth
equivalence is as trial load
~
value,
be 1 ~
in any one positive integer value, correspondingly
the horizontal earth pressure point of resultant force height of section is
,
be 1 ~
middle correspondence
~
a positive integer value of value, hydraulic test load
~
value also needs to meet following computing formula:
Formula one,
Formula two,
In formula,
---pipe gallery tube coupling is embedded in
~
namely
~
in the degree of depth
section horizontal earth pressure make a concerted effort value (
),
be 1 ~
in any one positive integer value;
---pipe gallery tube coupling
section horizontal earth pressure make a concerted effort value application point between pipe gallery tube coupling end face distance (
),
be 1 ~
middle correspondence
a positive integer value;
---distance between earth's surface or road surface end face to pipe gallery tube coupling end face (
);
---pipe gallery tube coupling end face to bottom surface overall height (
);
---earth's surface or the distance of road surface end face to the embedding place of piping lane tube coupling along change in depth (
), span is
~
between;
---pipe gallery tube coupling end face is to the hop count of bottom surface overall height decile;
---the unit weight of pipe gallery tube coupling embedding place soil (
);
---pipe gallery tube coupling embedding place earth lateral pressure coefficient (dimensionless),
value is except outside the Pass having with soil strength variation and density, also relevant with resistance to shear of soil history, and determines according to actual soil body situation;
---pipe gallery tube coupling embedding place horizontal earth pressure along the Distribution Value curve of the degree of depth,
relevant with the stress at the embedding place of pipe gallery tube coupling;
To calculate above
value,
be 1 ~
in any one positive integer value, as the hydraulic test load of pipe gallery tube coupling every section
~
value, analog synthesis piping lane tube coupling embedding place horizontal earth pressure is along the distribution curve of the degree of depth
, the actual loading situation of general pipe gallery tube coupling every section of better analog synthesis piping lane tube coupling of height 50 ~ 100cm energy; Require that the pressurized rigidity of vertical bearing plate and land plate is less than the Vertical Compression rigidity of pipe gallery tube coupling and horizontal pressurized rigidity respectively simultaneously, the outer wall of pipe gallery tube coupling is close to make enough be out of shape when vertical bearing plate and land plate pressurized, when particularly the horizontal rigidity of the horizontal pressurized ratio of rigidity pipe gallery tube coupling of land plate is little, can simulate horizontal earth pressure along the distribution curve of the degree of depth
.
Described pipe gallery tube coupling is the prefabricated standard tube coupling of Urban Underground pipe gallery, its section is rectangle or circular or dome-shaped, inside is provided with single cabin or two cabin or many cabins, and this pipe gallery tube coupling is built the top board of one, two coxostermums, base plate and inside by reinforced concrete and formed for the dividing plate separating cabin.
Described pipe gallery tube coupling has the unique point of stress and strain time stressed, need paste foil gauge, and automatically record foil gauge data by computer system at unique point place, to calculate corresponding stress; Also need fixing crack Width detecting instrument to detect the fracture width at the unique point place of pipe gallery tube coupling, and automatically record fracture width data by computer system.
The unique point of described pipe gallery tube coupling refers to that pipe gallery tube coupling can reflect the point of pipe gallery tube coupling structure stress situation under load action, pipe gallery tube coupling structure was calculated by finite element software in the design phase, and determine the predetermined portion that the load carrying capacity test stage must be detected, it comprises:
The top board end face place at A---pipe gallery tube coupling dividing plate top;
B, C---top board bottom surface place, pipe gallery tube coupling dividing plate both sides;
D, G---the web medial surface of pipe gallery tube coupling half height;
E, F---the dividing plate both sides of pipe gallery tube coupling half height;
H, I---plate top surface place, pipe gallery tube coupling dividing plate both sides.
Described pipe gallery tube coupling load carrying capacity test detects and show that the stress at each unique point place is compared with fracture width data with the calculated stress under design load effect with the fracture width data of record, can obtain following formula:
Formula three,
Formula four,
In formula,
----stress under trial load effect (
);
---calculated stress under design load effect (
);
---fracture width under trial load effect (
);
---calculating fracture width under design load effect (
);
---the ratio of the calculated stress under the stress under trial load effect and design load effect;
---the ratio of the calculating fracture width under the fracture width under trial load effect and design load effect;
with
illustrate that pipe gallery tube coupling load-bearing capacity is not less than the bearing capacity of designing requirement, meet design requirement, up-to-standard, can be delivered for use; Otherwise
with
illustrate that pipe gallery tube coupling load-bearing capacity is less than the bearing capacity of designing requirement, do not meet design requirement, off quality, can not be delivered for use.
Described vertical bearing plate bottom surface is set to makes with pipe gallery tube coupling end face the cambered surface be close to of coincideing, and vertical bearing plate end face is set to the plane of installing for multiple vertical lifting jack; Described land plate medial surface is set to makes with pipe gallery tube coupling lateral surface the cambered surface be close to of coincideing, and land plate lateral surface is set to the plane of installing for multiple level jack.
Described vertical bearing plate both sides are respectively equipped with vertical chute, and the two ends of this vertical bearing plate respectively slippage are arranged in described vertical chute; Described land plate both sides are respectively equipped with horizontal concrete chute, and the two ends of this land plate respectively slippage are arranged in described horizontal concrete chute.
Described test stand is the test unit skeleton of testing inspection pipe gallery tube coupling bearing capacity, the tower structure be welded by crossbeam, longeron, column and bottom girder plate, form the test space installed for described pipe gallery tube coupling in the inside of tower structure, described bottom girder plate bottom surface arranges multiple movable pulley.
A using method for pipe gallery tube coupling load carrying capacity test device, it comprises the steps:
The all parts of step one, making crossbeam, longeron, column, bottom girder plate, movable pulley, vertical bearing plate, vertical chute, land plate, horizontal concrete chute, and electric welding is carried out to relevant parts be combined into external member, after doing derusting rust-proofing process, then test stand is assembled into associated components or external member;
Step 2, in 1 ~ 2 layer, bottom girder plate upper berth geotextile, pipe gallery tube coupling to be hung in test stand, and make the bottom surface abutting contact of pipe gallery tube coupling in geotextile;
Step 3, be all covered with geotextile at pipe gallery tube coupling end face and both sides, the land plate of vertical bearing plate and both sides is close to corresponding geotextile;
Step 4, unlatching computer system, start vertical lifting jack and level jack applies trial load, and the mode that trial load takes classification to apply is carried out:
1. two vertical test loads are applied
value and hydraulic test load
~
each 20% of value, holds lotus 10 ~ 15min, and holding stress and the fracture width data at each unique point place of computer recording in the lotus time;
2. two vertical test loads are applied
value and hydraulic test load
~
each 50% of value, holds lotus 10 ~ 15min, and holding stress and the fracture width data at each unique point place of computer recording in the lotus time;
3. two vertical test loads are applied
value and hydraulic test load
~
each 100% of value, holds lotus 30min, and holding stress and the fracture width data at each unique point place of computer recording in the lotus time;
The stress that step 5, the pipe gallery tube coupling testing inspection that step 4 Computer system-computed is gone out each unique point place draw is compared with fracture width data with design-calculated stress with fracture width data, draws
with
value;
Step 6, draw conclusion (of pressure testing):
with
illustrate that pipe gallery tube coupling load-bearing capacity is not less than the bearing capacity of designing requirement, meet design requirement, up-to-standard, can be delivered for use; Otherwise
with
illustrate that pipe gallery tube coupling load-bearing capacity is less than the bearing capacity of designing requirement, do not meet design requirement, off quality, can not be delivered for use.
Compared with prior art, test unit of the present invention can carry out vertical load test and the horizontal loading test of pipe gallery tube coupling simultaneously, and hydraulic test load can be rationally, dummy level soil pressure exactly, meet the actual loading situation of pipe gallery tube coupling, improve the accuracy that pipe gallery tube coupling load carrying capacity test detects, guarantee the rationally proper use of of pipe gallery tube coupling and structural safety, assembling and the use of test unit can better be completed again in conjunction with corresponding using method, therefore there is simple structure, easy to use, method is reasonable, the advantages such as data are reliable, there is higher economic benefit and social benefit.
Accompanying drawing explanation
Fig. 1 is pipe gallery tube coupling load-bearing capacity loading test schematic diagram of the present invention.
Fig. 2 is A-A cut-open view of Fig. 1.
Fig. 3 is that pipe gallery tube coupling tests stressed schematic diagram.
Fig. 4 is trial load and application point rated figure.
Embodiment
To elaborate again to the embodiment of the present invention by above-mentioned accompanying drawing below.
As shown in Fig. 1 ~ Fig. 4,1. pipe gallery tube coupling, 11. top boards, 12. webs, 13. dividing plates, 14. base plates, 2. test stand, 21. crossbeams, 22. longerons, 23. columns, 24. bottom girder plates, 25. movable pulleys, 3. vertical bearing plate, 4. vertical chute, 5. vertical lifting jack, 6. land plate, 7. horizontal concrete chute, 8. level jack, 9. geotextile.
Pipe gallery tube coupling load carrying capacity test device and using method, as shown in Figure 1 and Figure 2, pipe gallery tube coupling load carrying capacity test device comprises pipe gallery tube coupling 1 and test stand 2, it is mainly used in the urban infrastructure construction of City Buried Pipeline construction and Daily Round Check and Maintain, more better completes assembling and the use of test unit in conjunction with corresponding using method.
Described pipe gallery tube coupling 1 is the prefabricated standard tube coupling of Urban Underground pipe gallery, its section is rectangle or circular or dome-shaped, inside is provided with single cabin or the various structures pattern such as two cabin or many cabins, this pipe gallery tube coupling 1 is built top board 11, two coxostermum 12 integrally, base plate 14 and inside by reinforced concrete and is jointly formed for the dividing plate 13 separating cabin, and the present embodiment mainly adopts assembled two cabins dome-shaped pipe gallery tube coupling.
Described test stand 2 is test unit skeletons of testing inspection pipe gallery tube coupling 1 bearing capacity, mainly be made up of crossbeam 21, longeron 22, column 23, bottom girder plate 24 and movable pulley 25 etc., movable pulley 25 is steel spherical structure, quantity arranges multiple, be installed in bottom girder plate 24 bottom surface to be supported on the ground by test unit, thus motoring ring test device moves freely and adjusts position; Described crossbeam 21, longeron 22, column 23, bottom girder plate 24 are by joist steel or channel-section steel through the tower structure that is welded, and the inside of this tower structure forms the test space can laid for pipe gallery tube coupling 1; Meanwhile, bottom girder plate 24 needing paving 1 ~ 2 layer of geotextile 9, when being hung in test stand 2 by pipe gallery tube coupling 1, making the bottom surface abutting contact of pipe gallery tube coupling 1 in geotextile 9.
Described pipe gallery tube coupling 1 top is provided with vertical bearing plate 3, and at vertical bearing plate with test stand 2 inner top surface, namely install multiple vertical lifting jack 5 between crossbeam 21 bottom surface, vertical bearing plate 3 and multiple vertical lifting jack 5 are mainly used in vertical load test, wherein, vertical bearing plate 3 is steel material making, its bottom surface is set to the cambered surface be close to that to match with pipe gallery tube coupling 1 end face, i.e. top board 11 end face, geotextile 9 is set between the end face of this cambered surface and pipe gallery tube coupling 1, and the plane that the end face of vertical bearing plate 3 can be installed for multiple vertical lifting jack 5, specifically vertical lifting jack 5 one end is fixed on bottom the crossbeam 21 of test stand 2, and other end contact is in the plane of vertical bearing plate 3 end face, simultaneously, vertical chute 4 is respectively equipped with in vertical bearing plate 3 both sides, this vertical chute adopts steel material to make, its end face is concave shape, the two ends of vertical bearing plate 3 are movable to be respectively inlaid in the vertical chute 4 of both sides, and can Vertical slippage be carried out, between the spill and the end of vertical bearing plate 3 of vertical chute 4, leave minim gap lubricate to facilitate lubricant of annotating, therefore start vertical lifting jack 5 when applying vertical test load, just can promote vertical bearing plate 3 for vertical movement, and drive vertical bearing plate 3 to apply vertical test load to unload in the end face of pipe gallery tube coupling 1 or the end face departing from pipe gallery tube coupling 1 and exit test, pressure at right angle is applied to the end face of pipe gallery tube coupling 1, to play the effect to pipe gallery tube coupling 1 vertical loading.
Described pipe gallery tube coupling 1 both sides are respectively equipped with land plate 6, at every block land plate 6 and test stand 2 medial surface, namely all install multiple level jack 8 between column 23 medial surface, land plate 6 and multiple level jack 8 are mainly used in horizontal loading test, wherein, land plate 6 is steel material making, its medial surface is set to the cambered surface be close to that to match with pipe gallery tube coupling 1 lateral surface, i.e. web 12 lateral surface, geotextile 9 is set between the lateral surface of this cambered surface and pipe gallery tube coupling 1, and the lateral surface of land plate 6 is set to the plane of installing for multiple level jack 8, specifically level jack 8 one end is fixed on the column 23 of test stand 2, and other end contact is in the plane of land plate 6, simultaneously, horizontal concrete chute 7 is respectively equipped with in land plate 6 both sides, this horizontal concrete chute adopts steel material to make, its end face is concave shape, the two ends of land plate 6 are movable to be respectively inlaid in the horizontal concrete chute 7 of both sides, and can horizontal sliding be carried out, between the spill and the end of land plate 6 of horizontal concrete chute 7, leave minim gap lubricate to facilitate lubricant of annotating, therefore start level jack 8 when applying hydraulic test load, just can promote land plate 6 to move horizontally, and drive land plate 6 to apply hydraulic test load to unload in the side of pipe gallery tube coupling 1 or the side departing from pipe gallery tube coupling 1 and exit test, horizontal pressure force is applied to the side of pipe gallery tube coupling 1, to play the effect to pipe gallery tube coupling 1 horizontal addload.
Pad between described vertical bearing plate 3 and the end face of pipe gallery tube coupling 1, between land plate 6 and the side of pipe gallery tube coupling 1, between the bottom surface of pipe gallery tube coupling 1 and the inner bottom surface of test stand 2 and put geotextile 9, mainly make pipe gallery tube coupling 1 good with the Contact of vertical bearing plate 3 or land plate 6, and can uniform force when carrying out vertical load test or horizontal loading test, when also avoiding pressure-loaded simultaneously because concrete surface outside pipe gallery tube coupling 1 is uneven, local compression and damage pipe gallery tube coupling 1.
The vertical test load of described pipe gallery tube coupling loading test
value and hydraulic test load
~
the defining method of value as shown in Figure 3, shown in Fig. 4:
Two vertical test loads of described pipe gallery tube coupling load carrying capacity test device
value and two vertical test loads
distance between value
and distance
determined by design,
for left vertical trial load
be worth the distance to pipe gallery tube coupling 1 dividing plate 13 center line,
for Right vertical trial load
be worth the distance to pipe gallery tube coupling 1 dividing plate 13 center line;
Described pipe gallery tube coupling load carrying capacity test device
individual hydraulic test load
~
value, wherein
for positive integer, as the present embodiment
when being 4,
~
value is exactly
,
,
,
, by that analogy; Described
individual hydraulic test load is determined by the method for pipe gallery tube coupling 1 buried depth soil pressure equivalence, when pipe gallery tube coupling embedding place horizontal earth pressure along the Distribution Value curve of the degree of depth is
,
; The overall height of pipe gallery tube coupling end face to bottom surface is divided into
section, the height of every section calculates from pipe gallery tube coupling end face, then each section of horizontal earth pressure makes a concerted effort to be worth
equivalence is as trial load
~
value,
be 1 ~
in any one positive integer value, correspondingly
the horizontal earth pressure point of resultant force height of section is
,
be 1 ~
middle correspondence
~
a positive integer value of value, hydraulic test load
~
value also needs to meet following computing formula:
Formula one,
Formula two,
In formula,
---pipe gallery tube coupling is embedded in
~
namely
~
in the degree of depth
section horizontal earth pressure make a concerted effort value (
),
be 1 ~
in any one positive integer value;
---pipe gallery tube coupling
section horizontal earth pressure make a concerted effort value application point between pipe gallery tube coupling end face distance (
),
be 1 ~
middle correspondence
a positive integer value;
---distance between earth's surface or road surface end face to pipe gallery tube coupling end face (
);
---pipe gallery tube coupling end face to bottom surface overall height (
);
---earth's surface or the distance of road surface end face to the embedding place of piping lane tube coupling along change in depth (
), span is
~
between;
---pipe gallery tube coupling end face is to the hop count of bottom surface overall height decile;
---the unit weight of pipe gallery tube coupling embedding place soil (
);
---pipe gallery tube coupling embedding place earth lateral pressure coefficient (dimensionless),
value is except outside the Pass having with soil strength variation and density, also relevant with resistance to shear of soil history, and determines according to actual soil body situation;
---pipe gallery tube coupling embedding place horizontal earth pressure along the Distribution Value curve of the degree of depth,
relevant with the stress at the embedding place of pipe gallery tube coupling; Pipe gallery tube coupling is embedded in the soil body of underground, and its stress more complicated, compare and common are earth pressure at rest, active earth pressure, passive earth pressure, earth resistance and earthquake earth pressure etc., the actual conditions according to engineering are determined by specification or relevant requirements.
To calculate above
value,
be 1 ~
in any one positive integer value, as the pipe gallery tube coupling 1 hydraulic test load of every section
~
value, analog synthesis piping lane tube coupling embedding place horizontal earth pressure is along the distribution curve of the degree of depth
, the actual loading situation of general pipe gallery tube coupling 1 every section of better analog synthesis piping lane tube coupling of height 50 ~ 100cm energy; Require that the pressurized rigidity of vertical bearing plate 3 and land plate 6 is less than the Vertical Compression rigidity of pipe gallery tube coupling and horizontal pressurized rigidity respectively simultaneously, the outer wall of pipe gallery tube coupling 1 is close to make enough be out of shape when vertical bearing plate 3 and land plate 6 pressurized, when particularly the horizontal rigidity of the horizontal pressurized ratio of rigidity pipe gallery tube coupling of land plate 6 is little, can simulate horizontal earth pressure along the distribution curve of the degree of depth
.
Vertical lifting jack 5, the level jack 8 of described pipe gallery tube coupling 1 load carrying capacity test device are hydraulic jack, and tested by the automatic control load of computer control system, foil gauge need be pasted at the unique point place of pipe gallery tube coupling 1, and automatically record foil gauge data by computer system, to calculate corresponding stress; In position also need fixing crack Width detecting instrument to detect the fracture width at the unique point place of pipe gallery tube coupling 1, and automatically record fracture width data by computer system.
The unique point of above-mentioned pipe gallery tube coupling 1 refers to that pipe gallery tube coupling can reflect the point of pipe gallery tube coupling structure stress situation under load action, pipe gallery tube coupling 1 structure was calculated by finite element software in the design phase, and determine the predetermined portion that the load carrying capacity test stage must be detected, generally comprise:
A---the top board 11 end face place at pipe gallery tube coupling dividing plate 13 top;
B, C---top board 11 bottom surface place, pipe gallery tube coupling dividing plate 13 both sides;
D, G---web 12 medial surface of pipe gallery tube coupling half height;
E, F---dividing plate 13 both sides of pipe gallery tube coupling half height;
H, I---base plate 14 end face place, pipe gallery tube coupling dividing plate 13 both sides.
Described pipe gallery tube coupling 1 load carrying capacity test detects and draws the stress at each unique point place and the fracture width data of record and vertical trial load under design load effect
value,
individual hydraulic test load
~
the stress that value calculates is compared with fracture width data, can obtain following formula:
Formula three,
Formula four,
In formula,
----stress under trial load effect (
);
---calculated stress under design load effect (
);
---fracture width under trial load effect (
);
---calculating fracture width under design load effect (
);
---the ratio of the calculated stress under the stress under trial load effect and design load effect;
---the ratio of the calculating fracture width under the fracture width under trial load effect and design load effect;
with
illustrate that pipe gallery tube coupling load-bearing capacity is not less than the bearing capacity of designing requirement, meet design requirement, up-to-standard, can be delivered for use; Otherwise
with
illustrate that pipe gallery tube coupling load-bearing capacity is less than the bearing capacity of designing requirement, do not meet design requirement, off quality, can not be delivered for use.
The using method of described pipe gallery tube coupling load carrying capacity test device mainly comprises the steps:
The all parts of step one, making crossbeam 21, longeron 22, column 23, bottom girder plate 24, movable pulley 25, vertical bearing plate 3, vertical chute 4, land plate 6, horizontal concrete chute 7, and electric welding is carried out to relevant parts be combined into external member, after doing derusting rust-proofing process, then test stand is assembled into associated components or external member;
Step 2, in 1 ~ 2 layer, bottom girder plate 24 upper berth geotextile 9, pipe gallery tube coupling 1 to be hung in test stand 2, and make the bottom surface abutting contact of pipe gallery tube coupling 1 in geotextile 9;
Step 4, unlatching computer system, start vertical lifting jack 5 and level jack 8 applies trial load, and the mode that trial load takes classification to apply is carried out:
1. two vertical test loads are applied
value and hydraulic test load
~
each 20% of value, holds lotus 10 ~ 15min, and holding stress and the fracture width data at each unique point place of computer recording in the lotus time;
2. two vertical test loads are applied
value and hydraulic test load
~
each 50% of value, holds lotus 10 ~ 15min, and holding stress and the fracture width data at each unique point place of computer recording in the lotus time;
3. two vertical test loads are applied
value and hydraulic test load
~
each 100% of value, holds lotus 30min, and holding stress and the fracture width data at each unique point place of computer recording in the lotus time;
The stress that step 5, pipe gallery tube coupling 1 testing inspection that step 4 Computer system-computed is gone out each unique point place draw is compared with fracture width data with design-calculated stress with fracture width data, draws
with
value;
Step 6, draw conclusion (of pressure testing):
with
illustrate that pipe gallery tube coupling 1 load-bearing capacity is not less than the bearing capacity of designing requirement, meet design requirement, up-to-standard, can be delivered for use; Otherwise
with
illustrate that pipe gallery tube coupling 1 load-bearing capacity is less than the bearing capacity of designing requirement, do not meet design requirement, off quality, can not be delivered for use.
The present invention describes pipe gallery tube coupling load carrying capacity test device and using method in detail with a specific embodiment again.
Embodiment
The two storehouse dome-shaped pipe gallery tube coupling load-bearing capacity loading test calculated examples of assembled:
Pipe gallery tube coupling is two cabins ogival sections, is of a size of
mm, cracking load for being less than 0.2mm fracture width, vertical test load
value refers to single concentrated force vertical test payload values.Pipe gallery tube coupling embedding place horizontal earth pressure is along the distribution curve of the degree of depth
, namely horizontal earth pressure is along the distribution curve linearly shape distribution of the degree of depth.The unit weight 14 of cohesive soil
, Stationary side coefficient of earth pressure
, crowd 5
, ground earthing 10
, crowd and ground earthing are converted into uniform thickness earth pillar height and are
, by pipe gallery tube coupling height
be divided into 4 sections, every section of 0.8m, pipe gallery tube coupling bearing capacity loading test relevant data calculates and sees the following form:
Piping lane tube coupling bearing capacity loading test tables of data
In table
---crowd and ground earthing be converted into uniform thickness earth pillar height (
);
---crowd and ground earthing are converted into uniform thickness earth pillar height
end face is to pipe gallery tube coupling
section bottom surface distance (
),
be 1 ~
in any one positive integer value;
---crowd and ground earthing are converted into uniform thickness earth pillar height
the following pipe gallery tube coupling of end face
section bottom surface horizontal earth pressure Distribution Value (
),
be 1 ~
middle correspondence
a positive integer value;
---pipe gallery tube coupling is embedded in
~
namely
~
in the degree of depth
section horizontal earth pressure make a concerted effort value (
),
be 1 ~
in any one positive integer value, namely get respectively
~
in any one positive integer value;
---pipe gallery tube coupling
section horizontal earth pressure make a concerted effort value application point between pipe gallery tube coupling top distance (
),
be 1 ~
middle correspondence
a positive integer value;
Vertical test load
, hydraulic test load (soil pressure make a concerted effort)
be pipe gallery tube coupling every along its length
numerical value, as pipe gallery tube coupling length is
(
), then the vertical test load in table
, hydraulic test load (soil pressure make a concerted effort)
value is all multiplied by
, side is the applying value of vertical test load, hydraulic test load.
Embodiment of the present invention is only not used in for illustration of the present invention and limits the scope of the invention; Should be understood that those skilled in the art can make various changes or modifications the present invention, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the present invention's instruction in addition.
Claims (10)
1. a pipe gallery tube coupling load carrying capacity test device, comprises test stand (2) and is placed on the pipe gallery tube coupling (1) in test stand, it is characterized in that:
A, described pipe gallery tube coupling (1) top are provided with vertical bearing plate (3), multiple vertical lifting jack (5) is installed between vertical bearing plate with test stand (2) inner top surface, it is for vertical movement that the plurality of vertical lifting jack promotes vertical bearing plate (3) jointly, and drive vertical bearing plate (3) to apply vertical test load to unload in the end face of pipe gallery tube coupling (1) or the end face departing from pipe gallery tube coupling (1) and exit test;
B, described pipe gallery tube coupling (1) both sides are respectively equipped with land plate (6), multiple level jack (8) is all installed between every block land plate and test stand (2) medial surface, the plurality of level jack jointly promotes land plate (6) and moves horizontally, and drives land plate (6) to apply hydraulic test load to unload in the side of pipe gallery tube coupling (1) or the side departing from pipe gallery tube coupling (1) and exit test;
C, between described vertical bearing plate (3) and the end face of pipe gallery tube coupling (1), between land plate (6) and the side of pipe gallery tube coupling (1), between the bottom surface of pipe gallery tube coupling (1) and the inner bottom surface of test stand (2), be equipped with geotextile (9).
2. pipe gallery tube coupling load carrying capacity test device according to claim 1, is characterized in that described pipe gallery tube coupling load carrying capacity test device has two vertical test loads
value and
individual hydraulic test load
~
value; Two described vertical test loads
value and two vertical test loads
distance between value
and distance
determined by design; Described
individual hydraulic test load
~
value, wherein
for positive integer, described
individual hydraulic test load is determined by the method for pipe gallery tube coupling (1) buried depth soil pressure equivalence, when pipe gallery tube coupling embedding place horizontal earth pressure along the Distribution Value curve of the degree of depth is
,
; The overall height of pipe gallery tube coupling (1) end face to bottom surface is divided into
section, the height of every section calculates from pipe gallery tube coupling end face, then each section of horizontal earth pressure makes a concerted effort to be worth
equivalence is as trial load
~
value,
be 1 ~
in any one positive integer value, correspondingly
the horizontal earth pressure point of resultant force height of section is
,
be 1 ~
middle correspondence
~
a positive integer value of value, hydraulic test load
~
value also needs to meet following computing formula:
Formula one,
Formula two,
In formula,
---pipe gallery tube coupling (1) is embedded in
~
namely
~
in the degree of depth
section horizontal earth pressure make a concerted effort value (
),
be 1 ~
in any one positive integer value;
---pipe gallery tube coupling (1)
section horizontal earth pressure make a concerted effort value application point between pipe gallery tube coupling (1) end face distance (
),
be 1 ~
middle correspondence
a positive integer value;
---distance between earth's surface or road surface end face to pipe gallery tube coupling (1) end face (
);
---pipe gallery tube coupling (1) end face to bottom surface overall height (
);
---earth's surface or the distance of road surface end face to piping lane tube coupling (1) embedding place along change in depth (
), span is
~
between;
---pipe gallery tube coupling (1) end face is to the hop count of bottom surface overall height decile;
---the unit weight of pipe gallery tube coupling (1) embedding place soil (
);
---pipe gallery tube coupling (1) embedding place earth lateral pressure coefficient (dimensionless),
value is except outside the Pass having with soil strength variation and density, also relevant with resistance to shear of soil history, and determines according to actual soil body situation;
---pipe gallery tube coupling (1) embedding place horizontal earth pressure along the Distribution Value curve of the degree of depth,
relevant with the stress at pipe gallery tube coupling (1) embedding place;
To calculate above
value,
be 1 ~
in any one positive integer value, as the hydraulic test load of pipe gallery tube coupling (1) every section
~
value, analog synthesis piping lane tube coupling (1) embedding place horizontal earth pressure is along the distribution curve of the degree of depth
, the actual loading situation of general pipe gallery tube coupling (1) every section of better analog synthesis piping lane tube coupling of height 50 ~ 100cm energy; Require that the pressurized rigidity of vertical bearing plate (3) and land plate (6) is less than the Vertical Compression rigidity of pipe gallery tube coupling (1) and horizontal pressurized rigidity respectively simultaneously, the outer wall of pipe gallery tube coupling (1) is close to make enough be out of shape when vertical bearing plate (3) and land plate (6) pressurized, when particularly the horizontal rigidity of horizontal pressurized ratio of rigidity pipe gallery tube coupling (1) of land plate (6) is little, can simulate horizontal earth pressure along the distribution curve of the degree of depth
.
3. pipe gallery tube coupling load carrying capacity test device according to claim 1 and 2, it is characterized in that described pipe gallery tube coupling (1) is the prefabricated standard tube coupling of Urban Underground pipe gallery, its section is rectangle or circular or dome-shaped, inside is provided with single cabin or two cabin or many cabins, and this pipe gallery tube coupling is built the top board (11) of one, two coxostermums (12), base plate (14) and inside by reinforced concrete and formed for the dividing plate (13) separating cabin.
4. pipe gallery tube coupling load carrying capacity test device according to claim 3, it is characterized in that described pipe gallery tube coupling (1) has the unique point of stress and strain time stressed, foil gauge need be pasted at unique point place, and automatically record foil gauge data by computer system, to calculate corresponding stress; Also need fixing crack Width detecting instrument to detect the fracture width at the unique point place of pipe gallery tube coupling (1), and automatically record fracture width data by computer system.
5. pipe gallery tube coupling load carrying capacity test device according to claim 4, it is characterized in that the unique point of described pipe gallery tube coupling (1) refers to that pipe gallery tube coupling can reflect the point of pipe gallery tube coupling structure stress situation under load action, pipe gallery tube coupling structure was calculated by finite element software in the design phase, and determine the predetermined portion that the load carrying capacity test stage must be detected, it comprises:
Top board (11) the end face place at A---pipe gallery tube coupling (1) dividing plate (13) top;
B, C---top board (11) bottom surface place, pipe gallery tube coupling (1) dividing plate (13) both sides;
Web (12) medial surface of D, G---pipe gallery tube coupling (1) half height;
Dividing plate (13) both sides of E, F---pipe gallery tube coupling (1) half height;
H, I---base plate (14) end face place, pipe gallery tube coupling (1) dividing plate (13) both sides.
6. pipe gallery tube coupling load carrying capacity test device according to claim 4, it is characterized in that described pipe gallery tube coupling (1) load carrying capacity test detects and show that the stress at each unique point place is compared with fracture width data with the calculated stress under design load effect with the fracture width data of record, following formula can be obtained:
Formula three,
Formula four,
In formula,
----stress under trial load effect (
);
---calculated stress under design load effect (
);
---fracture width under trial load effect (
);
---calculating fracture width under design load effect (
);
---the ratio of the calculated stress under the stress under trial load effect and design load effect;
---the ratio of the calculating fracture width under the fracture width under trial load effect and design load effect;
with
illustrate that pipe gallery tube coupling (1) load-bearing capacity is not less than the bearing capacity of designing requirement, meet design requirement, up-to-standard, can be delivered for use; Otherwise
with
illustrate that pipe gallery tube coupling (1) load-bearing capacity is less than the bearing capacity of designing requirement, do not meet design requirement, off quality, can not be delivered for use.
7. pipe gallery tube coupling load carrying capacity test device according to claim 1, it is characterized in that described vertical bearing plate (3) bottom surface is set to and make with pipe gallery tube coupling (1) end face the cambered surface be close to of coincideing, vertical bearing plate (3) end face is set to the plane of installing for multiple vertical lifting jack (5); Described land plate (6) medial surface is set to makes with pipe gallery tube coupling (1) lateral surface the cambered surface be close to of coincideing, and land plate (6) lateral surface is set to the plane of installing for multiple level jack (8).
8. pipe gallery tube coupling load carrying capacity test device according to claim 1, it is characterized in that described vertical bearing plate (3) both sides are respectively equipped with vertical chute (4), the two ends of this vertical bearing plate (3) respectively slippage are arranged in described vertical chute (4); Described land plate (6) both sides are respectively equipped with horizontal concrete chute (7), and the two ends of this land plate (6) respectively slippage are arranged in described horizontal concrete chute (7).
9. pipe gallery tube coupling load carrying capacity test device according to claim 1, it is characterized in that described test stand (2) is the test unit skeleton of testing inspection pipe gallery tube coupling (1) bearing capacity, the tower structure be welded by crossbeam (21), longeron (22), column (23) and bottom girder plate (24), form the test space installed for described pipe gallery tube coupling (1) in the inside of tower structure, described bottom girder plate (24) bottom surface arranges multiple movable pulley (25).
10. a using method for pipe gallery tube coupling load carrying capacity test device, is characterized in that the method comprises the steps:
The all parts of step one, making crossbeam (21), longeron (22), column (23), bottom girder plate (24), movable pulley (25), vertical bearing plate (3), vertical chute (4), land plate (6), horizontal concrete chute (7), and electric welding is carried out to relevant parts be combined into external member, after doing derusting rust-proofing process, then test stand is assembled into associated components or external member;
Step 2, on bottom girder plate (24) upper berth 1 ~ 2 layer of geotextile (9), pipe gallery tube coupling (1) is hung in test stand (2), and makes the bottom surface abutting contact of pipe gallery tube coupling (1) in geotextile (9);
Step 3, be all covered with geotextile (9) at pipe gallery tube coupling (1) end face and both sides, the land plate (6) of vertical bearing plate (3) and both sides is close to corresponding geotextile (9);
Step 4, unlatching computer system, start vertical lifting jack (5) and level jack (8) applies trial load, and the mode that trial load takes classification to apply is carried out:
1. two vertical test loads are applied
value and hydraulic test load
~
each 20% of value, holds lotus 10 ~ 15min, and holding stress and the fracture width data at each unique point place of computer recording in the lotus time;
2. two vertical test loads are applied
value and hydraulic test load
~
each 50% of value, holds lotus 10 ~ 15min, and holding stress and the fracture width data at each unique point place of computer recording in the lotus time;
3. two vertical test loads are applied
value and hydraulic test load
~
each 100% of value, holds lotus 30min, and holding stress and the fracture width data at each unique point place of computer recording in the lotus time;
The stress that step 5, the pipe gallery tube coupling testing inspection that step 4 Computer system-computed is gone out each unique point place draw is compared with fracture width data with design-calculated stress with fracture width data, draws
with
value;
Step 6, draw conclusion (of pressure testing):
with
illustrate that pipe gallery tube coupling load-bearing capacity is not less than the bearing capacity of designing requirement, meet design requirement, up-to-standard, can be delivered for use; Otherwise
with
illustrate that pipe gallery tube coupling load-bearing capacity is less than the bearing capacity of designing requirement, do not meet design requirement, off quality, can not be delivered for use.
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| CN113654922B (en) * | 2021-08-03 | 2023-10-31 | 华侨大学 | Joint torsion resistance model testing device of cementing prestress assembly type pipe gallery |
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