CN202433253U - Auxiliary device for pull-out test of hooked anchors - Google Patents

Auxiliary device for pull-out test of hooked anchors Download PDF

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Publication number
CN202433253U
CN202433253U CN2012200449680U CN201220044968U CN202433253U CN 202433253 U CN202433253 U CN 202433253U CN 2012200449680 U CN2012200449680 U CN 2012200449680U CN 201220044968 U CN201220044968 U CN 201220044968U CN 202433253 U CN202433253 U CN 202433253U
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Prior art keywords
intermediate plate
plate ring
crotch
formula
pull
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CN2012200449680U
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Inventor
李永明
周琪
段群苗
郭志奇
柳淑波
章海涛
周一勤
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Ningbo Communication Engineering Construction Group Co Ltd
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Ningbo Communication Engineering Construction Group Co Ltd
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Abstract

The utility model discloses an auxiliary device for a pull-out test of hooked anchors. The auxiliary device for the pull-out test of the hooked anchors can be applied to the anchoring force pull-out test of the hooked anchors for highway subgrade slope strengthening, tunnel surrounding rock preliminary bracing, tunnel secondary lining concrete strengthening and concrete strengthening of structures including buildings and the like, and is structurally and mainly composed of a support, a pull-out frame, a pull-out instrument, a main pull rod, a pulling plate, a clamping piece ring, an auxiliary pull rod and the like. When the auxiliary device is used, the support is covered on the hooked anchors, then the hooked anchors are clamped through the pull-out frame, and the anchoring force of the hooked anchors fixed on reinforced structures can be measured only by starting a pull-out instrument jack. The auxiliary device is simple, low in price and practical, can perform the pull-out test of the hooked anchors by utilizing an existing pull-out instrument, can effectively test and detect the anchoring force of the hooked anchors of various structures and is an economic and practical auxiliary device for the anchoring force test of the hooked anchors.

Description

A kind of crotch anchor pole pull-out test servicing unit
Technical field
The utility model relates to a kind of servicing unit of pull-out test of anchor-holding force of anchor bolt, is meant a kind of crotch anchor pole pull-out test servicing unit specifically.
Background technology
At present; In works concrete strengthening engineerings such as highway subgrade slope reinforcing, tunnel surrounding preliminary bracing, Tunnel Second Lining concrete strengthening, bridge; Quarter bend grappling iron bar can increase the concrete cohesive force of post-reinforcing effectively, increase shearing strength and load-bearing capacity, so the anchor force of crotch anchor pole is very important data; In order to test the anchor force that detects the crotch anchor pole, generally use drawing appearance lifting jack and carry out the pull-out test detection.Existing drawing appearance lifting jack and intermediate plate ground tackle all are the hollow cylinder structures; Only be adapted to straight anchor pole and stretch into enforcement drawing detection test in this hollow cylinder; And the crotch anchor pole is done drawing detection test owing to there is the quarter bend hook structure so can't directly use existing drawing appearance lifting jack.Some engineering is in order to provide the pull-out test data of crotch anchor pole; Often take some not meet the way of technical manual; As not making earlier crotch; Use existing drawing appearance to treat to weld crotch again after test detects, this can cause the binding material intensity between crotch anchor pole and the works to reduce, and influences anchor force; Or as reserve crotch length, use existing drawing appearance treat test detect after more on the spot bending anchor pole head end make crotch, this not only spends a large amount of manpower bending anchor poles, and the anchor pole size is also inaccurate.Often cost is high if develop a kind of novel crotch anchor pole pull-out test device again, and can not utilize existing drawing appearance.
Summary of the invention
The utility model technical matters to be solved is to overcome the defective of prior art and provides a kind of anchor force drawing that is applicable to the crotch anchor pole to detect the pull-out test servicing unit of test, can important scientific basis be provided for engineering construction and the acceptance of work through this servicing unit.
The technical matters of the utility model realizes through following technical scheme:
A kind of crotch anchor pole pull-out test servicing unit; Comprise that a cover is combined in the support on the crotch anchor pole; This top of the trellis is equipped with drawing appearance lifting jack; Be provided with the drawing frame that connects drawing appearance lifting jack and crotch anchor pole respectively in the support, described drawing frame comprises arm-tie and intermediate plate ring, also comprises the subtie that connects arm-tie and intermediate plate ring respectively; Main tie one end is installed on the described arm-tie, and this main tie other end activity is passed support and is connected on the drawing appearance lifting jack; Described intermediate plate ring is provided with the taper hole that supplies crotch anchor pole cover to pack into, is fitted with the wedge type intermediate plate of a plurality of obvolvents on the crotch anchor pole in this taper hole.
Described arm-tie is rounded, and intermediate plate ring profile is the equilateral triangle shape, and described subtie has three, and these three subties are connected on arm-tie and three angles of intermediate plate ring.
Described support comprises circular platform, and this circular platform middle part is provided with center pit, and the circular platform below is provided with three to extending below the also leg of circumference uniform distribution.
Described crotch anchor pole is a quarter bend grappling iron bar.
The wedge type intermediate plate is made up of 2 or 3 of circumference obvolvent.
The taper hole of said intermediate plate ring can not lived by the quarter bend dogging of crotch anchor pole, wherein the taper hole of intermediate plate ring size and intermediate plate ring thickness hNeed satisfy following computing formula:
Formula one,
Figure 2012200449680100002DEST_PATH_IMAGE002
Formula two,
Figure 2012200449680100002DEST_PATH_IMAGE004
Formula three,
Figure 2012200449680100002DEST_PATH_IMAGE006
In the formula, intermediate plate ring lower end taper hole diameter;
Figure 2012200449680100002DEST_PATH_IMAGE010
intermediate plate ring upper end taper hole diameter;
Figure 2012200449680100002DEST_PATH_IMAGE012
crotch bolt diameter;
The taper hole tapering angle of intermediate plate ring;
intermediate plate ring thickness;
The angle of
Figure 2012200449680100002DEST_PATH_IMAGE018
intermediate plate ring and crotch anchor pole;
More than in three formula; Intermediate plate ring lower end taper hole diameter
Figure 2012200449680100002DEST_PATH_IMAGE020
, upper end taper hole diameter are definite according to the material of crotch bolt diameter size and intermediate plate ring, wedge type intermediate plate; Can obtain taper hole tapering angle
Figure 2012200449680100002DEST_PATH_IMAGE026
, the intermediate plate ring thickness
Figure 2012200449680100002DEST_PATH_IMAGE028
of intermediate plate ring by above formula one, formula two and formula three simultaneous, the intermediate plate ring thickness of result of calculation
Figure 246462DEST_PATH_IMAGE028
is a maximum ga(u)ge; Also need consider the minimum thickness of intermediate plate ring during actual simultaneously the use; These intermediate plate ring minimum thickness need are confirmed according to the tensile strength of the bolt length that subtie is connected with the intermediate plate ring; The intermediate plate ring maximum ga(u)ge that calculates can not satisfy the tensile strength requirement of the bolt length that subtie is connected with the intermediate plate ring, then need adjust the taper hole tapering angle
Figure 996374DEST_PATH_IMAGE026
or the taper hole diameter dimension of intermediate plate ring;
The said data that obtain according to formula one, formula two and formula three are made this experiment auxiliary device, and the test figure after actual crotch anchor rod experiment detects is carried out computational analysis according to formula four:
Formula four, η=
Figure 2012200449680100002DEST_PATH_IMAGE030
In the formula:
The ratio of η---crotch anchor-holding force of anchor bolt measured result and theoretical value;
---crotch anchor-holding force of anchor bolt measured value;
Figure 2012200449680100002DEST_PATH_IMAGE034
---crotch anchor-holding force of anchor bolt design theory value;
When η >=1, the anchor force of crotch anchor pole meets the requirements; When η＜1, the anchor force of crotch anchor pole is undesirable, needs by the relevant technologies specification handles until doing over again.
Compared with prior art; The utility model mainly provides a kind of servicing unit that is applicable to crotch anchor-holding force of anchor bolt drawing detection test; This servicing unit is simple in structure, cost is lower, practical; Operating personnel need not can grasp its test method through special training, thus solved the present problem that always can't accurately test the crotch anchor-holding force of anchor bolt, for engineering construction and the acceptance of work provide important scientific basis.
Description of drawings
Fig. 1 is the structural representation of the utility model.
Fig. 2 is the structural representation of drawing frame.
Fig. 3 is the sectional structure synoptic diagram of support.
Fig. 4 is the upward view of Fig. 3.
Fig. 5 is the stereographic map of Fig. 3.
Fig. 6 is the sectional structure synoptic diagram of intermediate plate ring.
Fig. 7 is the vertical view of Fig. 6.
Fig. 8 is the taper hole size and the intermediate plate ring thickness of intermediate plate ring hThe computing formula synoptic diagram.
Embodiment
To elaborate again to the utility model embodiment by above-mentioned accompanying drawing below.
Like Fig. 1～shown in Figure 8,1. reinforced structure thing, 2. crotch anchor pole, 3. support, 31. circular platforms, 32. legs, 33. center pits, 4. drawing appearance lifting jack, 5. drawing appearance intermediate plate ring, 6. wedge type intermediate plate, 7. drawing frame, 71. subties, 72. main ties, 73. arm-ties, 74. intermediate plate rings, 741. taper holes, 75. nuts, 8. drawing appearance wedge type intermediate plate.
A kind of crotch anchor pole pull-out test servicing unit, the anchor force pull-out test that can be applicable to the crotch anchor pole of works concrete strengthenings such as highway subgrade slope reinforcing, tunnel surrounding preliminary bracing, Tunnel Second Lining concrete strengthening, bridge detects.
Described crotch anchor pole 2 is a quarter bend grappling iron bar; Also have the quarter bend of being called grappling iron nail, appellation not to be both since at present engineering bound pair anchor pole or holdfast also do not have definite definition, generally big, anchorage length is long calls anchor pole diameter; Otherwise be called holdfast; No matter crotch anchor pole or crotch holdfast all are identical to the use and the effect of the utility model, so the utility model is said no longer distinguishes holdfast or anchor pole and be referred to as the crotch anchor pole.But the utility model utilizes existing drawing appearance efficiency test to detect crotch anchor pole 2 anchor force on the multiple reinforced structure thing 1, is a kind of economical and practical ancillary test device and test method.
Described crotch anchor pole pull-out test servicing unit is as shown in Figure 1; Mainly comprise a support 3; This support such as Fig. 3 ~ shown in Figure 5; Its top is a circular platform 31, offers center pit 33 at the circle centre position of circular platform, and the excircle of circular platform is provided with three to extending below and the leg 32 of circumference uniform distribution.Support 3 needs cover to be combined on the crotch anchor pole 2 mainly as the workbench of whole servicing unit in actual the use, and three legs 32 of support then lie in a horizontal plane on the reinforced structure thing 1.
Described support 3 tops are equipped with drawing appearance lifting jack 4, drawing appearance intermediate plate ring 5 and wedge type intermediate plate 8, add other equipment, are existing straight anchor pole drawing appearance, and the propulsion system that detect test mainly as the drawing of crotch anchor pole detect data with the acquisition test; Be provided with drawing frame 7 in the support 3; This drawing frame is as shown in Figure 2; It comprises arm-tie 73 that is positioned at the top and the intermediate plate ring 74 that is positioned at the bottom, and this arm-tie is rounded, and intermediate plate ring such as Fig. 6, profile shown in Figure 7 are the equilateral triangle shape; Correspondence is provided with subtie 71 to connect respectively between arm- tie 73 and 74 3 angles of intermediate plate ring, and wherein the subtie upper end is fastening with arm-tie 73 usefulness nuts 75; Subtie 71 lower ends are connected with intermediate plate ring 74 usefulness bolts, thereby form the framed structure of triangular column.Be connected with main tie 72 1 ends on the described arm-tie 73; This main tie other end activity is connected on the drawing appearance intermediate plate ring 5 of drawing appearance lifting jack 4 after passing the center pit 33 on the support 3, and through drawing appearance wedge type intermediate plate 8 drawing appearance intermediate plate ring is connected to form with main tie 72 clampings.Described intermediate plate ring 74 centers are provided with up big and down small taper hole 741; This taper hole mainly is to supply crotch anchor pole 2 covers to pack into; In taper hole, be fitted with simultaneously 2 or the wedge type intermediate plate 6 of 3 obvolvents on crotch anchor pole 2; Intermediate plate ring 74 is formed with crotch anchor pole 2 be connected, wedge type intermediate plate 6 sizes are mainly selected for use according to the diameter of crotch anchor pole 2.
The taper hole 741 of intermediate plate ring 74 packs into crotch anchor pole 2 head ends that are fixed on the reinforced structure thing 1 in the said drawing frame 7; And be inserted in the vertical position of crotch anchor pole along the crotch anchor pole always; When contact point A, contact point B and contact point C are positioned at position shown in Figure 8; Intermediate plate ring 74 just can not lived by the quarter bend dogging of crotch anchor pole 2, and can go into vertical position along the quarter bend rhampotheca of crotch anchor pole smoothly, at this moment taper hole 741 size and intermediate plate ring 74 thickness of intermediate plate ring 74 hNeed satisfy following computing formula:
Formula one,
Figure 218408DEST_PATH_IMAGE002
Formula two,
Figure 630935DEST_PATH_IMAGE004
Formula three,
Figure 845885DEST_PATH_IMAGE006
In the formula,
Figure 27467DEST_PATH_IMAGE008
intermediate plate ring lower end taper hole diameter;
Figure 154823DEST_PATH_IMAGE010
intermediate plate ring upper end taper hole diameter;
crotch bolt diameter;
The taper hole tapering angle of
Figure 620757DEST_PATH_IMAGE014
intermediate plate ring;
Figure 607911DEST_PATH_IMAGE016
intermediate plate ring thickness;
The angle of
Figure 968485DEST_PATH_IMAGE018
intermediate plate ring and crotch anchor pole;
More than in three formula; Intermediate plate ring lower end taper hole diameter
Figure 293287DEST_PATH_IMAGE020
, upper end taper hole diameter
Figure 663089DEST_PATH_IMAGE022
are definite according to the material of crotch bolt diameter
Figure 553684DEST_PATH_IMAGE024
size and intermediate plate ring, wedge type intermediate plate; Can obtain taper hole tapering angle
Figure 537690DEST_PATH_IMAGE026
, the intermediate plate ring thickness
Figure 146525DEST_PATH_IMAGE028
of intermediate plate ring by above formula one, formula two and formula three simultaneous, the intermediate plate ring thickness of result of calculation
Figure 320018DEST_PATH_IMAGE028
is a maximum ga(u)ge; During actual the use, also need consider the minimum thickness of intermediate plate ring 74 simultaneously, these intermediate plate ring minimum thickness need are confirmed according to the tensile strength of the bolt length that subtie 71 is connected with the intermediate plate ring.Can not satisfy the tensile strength requirement of the bolt length that subtie is connected with the intermediate plate ring like the intermediate plate ring maximum ga(u)ge that calculates, then need adjust the taper hole tapering angle
Figure 268382DEST_PATH_IMAGE026
or the taper hole diameter dimension of intermediate plate ring 74.
The said data that obtain according to formula one, formula two and formula three are made experiment auxiliary device of the present invention, and the test figure after actual crotch anchor rod experiment detects is carried out computational analysis according to formula four:
Formula four, η=
Figure 236338DEST_PATH_IMAGE030
In the formula:
The ratio of η---crotch anchor-holding force of anchor bolt measured result and theoretical value;
Figure 20886DEST_PATH_IMAGE032
---crotch anchor-holding force of anchor bolt measured value;
Figure 732490DEST_PATH_IMAGE034
---crotch anchor-holding force of anchor bolt design theory value;
When η >=1, the anchor force of crotch anchor pole meets the requirements; When η＜1, the anchor force of crotch anchor pole is undesirable, needs by the relevant technologies specification handles until doing over again.
Taper hole 741 size and intermediate plate ring 74 thickness of above-mentioned intermediate plate ring 74 hComputing formula is through following examples checking, and this embodiment is following:
The crotch bolt diameter is generally
Figure 2012200449680100002DEST_PATH_IMAGE036
～and
Figure DEST_PATH_IMAGE038
; So desirable intermediate plate ring lower end taper hole diameter
Figure DEST_PATH_IMAGE040
; Intermediate plate ring upper end taper hole diameter
Figure DEST_PATH_IMAGE042
, calculate intermediate plate ring thickness
Figure 722311DEST_PATH_IMAGE028
:
(diameter satisfies less than
Figure 382280DEST_PATH_IMAGE038
naturally with crotch bolt diameter
Figure 798852DEST_PATH_IMAGE038
calculating; Need not calculate), get by formula one
Figure DEST_PATH_IMAGE046
Calculate with trial and error procedure; If different
Figure 317482DEST_PATH_IMAGE028
is worth computing formula three, get final product when substitution formula two equalities are set up again.After tentative calculation repeatedly, can know
Figure DEST_PATH_IMAGE048
.Difference substitution formula two, formula three with
Figure 240438DEST_PATH_IMAGE048
,
Figure DEST_PATH_IMAGE050
Figure DEST_PATH_IMAGE052
is connected the tensile strength of length with the bolt of intermediate plate ring according to subtie; Confirm that intermediate plate ring thickness
Figure DEST_PATH_IMAGE054
is promptly enough, just can guarantee that the intermediate plate ring can not lived by the quarter bend dogging in along the quarter bend rhampotheca of crotch anchor pole to the vertical position process of crotch anchor pole so get intermediate plate ring thickness .
The test method of said pull-out test servicing unit adopts following operation steps:
Step 1, the taper hole 741 of intermediate plate ring 74 in the drawing frame 7 is packed into crotch anchor pole 2 head ends that are fixed on the reinforced structure thing 1, and be inserted in the vertical position of crotch anchor pole always along the crotch anchor pole;
Step 2,2 or 3 wedge type intermediate plate 6 obvolvents are installed on crotch anchor pole 2 in the taper hole 741 of intermediate plate ring 74;
Step 3, the center pit 33 at support 3 tops is inserted in downwards along the main tie 72 of drawing frame 7; Three legs 32 until support 3 lie in a horizontal plane on the reinforced structure thing 1; This main tie 72 is done upper and lower motion in the center pit 33 of support 3, the frame 7 of drawing simultaneously is synchronized with the movement in the significant height of reinforced structure thing 1 surface and support 3;
Step 4, drawing appearance lifting jack 4 is installed in support 3 tops, drawing appearance intermediate plate ring 5 is installed, drawing appearance intermediate plate ring 5 and main tie 72 are clamped through drawing appearance wedge type intermediate plate 8;
Step 5, startup drawing appearance lifting jack 4 oil hydraulic systems are carried out pull-out test according to the design anchor force of crotch anchor pole 2, draw test figure.
The said embodiment of the utility model only be used to the utility model is described and be not used in the restriction the utility model scope.Should be understood that in addition those skilled in the art can do various changes or modification to the utility model after the content of having read the utility model instruction, these equivalent form of values fall within the application's appended claims institute restricted portion equally.

Claims (6)

1. crotch anchor pole pull-out test servicing unit; It is characterized in that this pull-out test servicing unit comprises that a cover is combined in the support (3) on the crotch anchor pole (2); This top of the trellis is equipped with drawing appearance lifting jack (4), is provided with the drawing frame (7) that connects drawing appearance lifting jack (4) and crotch anchor pole (2) respectively in the support; Described drawing frame (7) comprises arm-tie (73) and intermediate plate ring (74), also comprises the subtie (71) that connects arm-tie (73) and intermediate plate ring (74) respectively; Main tie (72) one ends are installed on the described arm-tie (73), and this main tie other end activity is passed support (3) and is connected on the drawing appearance lifting jack (4); Described intermediate plate ring (74) is provided with the taper hole (741) that supplies crotch anchor pole (2) cover to pack into, is fitted with the wedge type intermediate plate (6) of a plurality of obvolvents on crotch anchor pole (2) in this taper hole.
2. a kind of crotch anchor pole pull-out test servicing unit according to claim 1; It is characterized in that described arm-tie (73) is rounded; Intermediate plate ring (74) profile is the equilateral triangle shape; Described subtie (71) has three, and these three subties are connected on arm-tie (73) and (74) three angles of intermediate plate ring.
3. a kind of crotch anchor pole pull-out test servicing unit according to claim 1; It is characterized in that described support (3) comprises circular platform (31); This circular platform middle part is provided with center pit (33), and circular platform (31) below is provided with three to extending below the also leg (32) of circumference uniform distribution.
4. a kind of crotch anchor pole pull-out test servicing unit according to claim 1 is characterized in that described crotch anchor pole (2) is a quarter bend grappling iron bar.
5. a kind of crotch anchor pole pull-out test servicing unit according to claim 1 is characterized in that described wedge type intermediate plate (6) is made up of 2 or 3 of circumference obvolvent.
6. a kind of crotch anchor pole pull-out test servicing unit according to claim 1; The taper hole (741) that it is characterized in that said intermediate plate ring (74) can not lived by the quarter bend dogging of crotch anchor pole (2), and wherein the taper hole (741) of intermediate plate ring (74) size and intermediate plate ring (74) thickness h need satisfy following computing formula:
Formula one, Sin u = d D 2
Formula two, 2 h D 2 - D 1 - Tgv = 0
Formula three, h Sin v + D 1 Conu - d Con ( u + v ) = 0
In the formula, D 1--intermediate plate ring lower end taper hole diameter;
D 2--intermediate plate ring upper end taper hole diameter;
D--crotch bolt diameter;
The taper hole tapering angle of v--intermediate plate ring;
H--intermediate plate ring thickness;
The angle of v--intermediate plate ring and crotch anchor pole;
More than in three formula, intermediate plate ring lower end taper hole diameter D 1, upper end taper hole diameter D 2Material according to crotch bolt diameter d size and intermediate plate ring, wedge type intermediate plate is definite, can obtain taper hole tapering angle v, the intermediate plate ring thickness h of intermediate plate ring by above formula one, formula two and formula three simultaneous, and the intermediate plate ring thickness h of result of calculation is a maximum ga(u)ge; Also need consider the minimum thickness of intermediate plate ring (74) during actual simultaneously the use; These intermediate plate ring minimum thickness need are confirmed according to the tensile strength of the bolt length that subtie (71) is connected with the intermediate plate ring; The intermediate plate ring maximum ga(u)ge that calculates can not satisfy the tensile strength requirement of the bolt length that subtie is connected with the intermediate plate ring, then need adjust the taper hole tapering angle v or the taper hole diameter dimension of intermediate plate ring (74);
The said data that obtain according to formula one, formula two and formula three are made this experiment auxiliary device, and the test figure after actual crotch anchor rod experiment detects is carried out computational analysis according to formula four:
Formula four, η = Ps P i
In the formula:
The ratio of η---crotch anchor-holding force of anchor bolt measured result and theoretical value;
Ps---crotch anchor-holding force of anchor bolt measured value;
P i---crotch anchor-holding force of anchor bolt design theory value;
When η >=1, the anchor force of crotch anchor pole meets the requirements; When η＜1, the anchor force of crotch anchor pole is undesirable, needs by the relevant technologies specification handles until doing over again.
CN2012200449680U 2012-02-13 2012-02-13 Auxiliary device for pull-out test of hooked anchors Withdrawn - After Issue CN202433253U (en)

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Application Number Priority Date Filing Date Title
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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102589973A (en) * 2012-02-13 2012-07-18 宁波交通工程建设集团有限公司 Pullout test auxiliary device for hook anchor rod and test method
CN103323336A (en) * 2013-01-22 2013-09-25 同济大学 Simulation experiment apparatus used for testing drawing force of anchor pole and application method thereof
CN104697848A (en) * 2015-02-10 2015-06-10 华北科技学院 Novel mine anchor rod quality detection pulling device
US9726657B2 (en) 2015-01-12 2017-08-08 University Of Dammam Pullout apparatus and system for testing of anchor bolts/bars

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102589973A (en) * 2012-02-13 2012-07-18 宁波交通工程建设集团有限公司 Pullout test auxiliary device for hook anchor rod and test method
CN103323336A (en) * 2013-01-22 2013-09-25 同济大学 Simulation experiment apparatus used for testing drawing force of anchor pole and application method thereof
CN103323336B (en) * 2013-01-22 2015-11-25 同济大学 A kind of experiment simulator and method thereof of carrying out anchor rod drawing Force meansurement
US9726657B2 (en) 2015-01-12 2017-08-08 University Of Dammam Pullout apparatus and system for testing of anchor bolts/bars
CN104697848A (en) * 2015-02-10 2015-06-10 华北科技学院 Novel mine anchor rod quality detection pulling device

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