CN106978813B - The anti-failure power transmission component of the relay of large deep foundation pit bracing members system - Google Patents

The anti-failure power transmission component of the relay of large deep foundation pit bracing members system Download PDF

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Publication number
CN106978813B
CN106978813B CN201710235286.5A CN201710235286A CN106978813B CN 106978813 B CN106978813 B CN 106978813B CN 201710235286 A CN201710235286 A CN 201710235286A CN 106978813 B CN106978813 B CN 106978813B
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China
Prior art keywords
support unit
force transmitting
power transmission
transmitting board
bracing members
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CN201710235286.5A
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CN106978813A (en
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马荣全
王浩
孙旻
徐云峰
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China Construction Eighth Engineering Division Co Ltd
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China Construction Eighth Engineering Division Co Ltd
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    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D17/00Excavations; Bordering of excavations; Making embankments
    • E02D17/02Foundation pits
    • E02D17/04Bordering surfacing or stiffening the sides of foundation pits
    • EFIXED CONSTRUCTIONS
    • E02HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
    • E02DFOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
    • E02D2300/00Materials
    • E02D2300/0026Metals
    • E02D2300/0029Steel; Iron

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Paleontology (AREA)
  • Civil Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Structural Engineering (AREA)
  • Bridges Or Land Bridges (AREA)
  • Conveying And Assembling Of Building Elements In Situ (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Vehicle Cleaning, Maintenance, Repair, Refitting, And Outriggers (AREA)

Abstract

The invention discloses a kind of anti-failure power transmission components of the relay of large deep foundation pit bracing members system, bracing members system includes the bracing members being supported in foundation pit, bracing members include at least one first support unit and one second support unit, and the first support unit is abutted each other with the second support unit along same axis;Relay include the relaying jack being installed between the first support unit and the second support unit and be installed on relaying jack on the outside of power transmission component, the first end of power transmission component extends to the first support unit direction and is fixedly connected with the first support unit, and the second end of power transmission component extends to the second support unit direction and is slidably connected with the second support unit.Power transmission component one end of the invention is fixed, and one end sliding constitutes the force transfer structure for being similar to simply supported beam, allows to relay jack axial free movement, and play the role of sharing the moment of flexure and shearing at bracing members connecting node, is played a protective role to relaying jack.

Description

The anti-failure power transmission component of the relay of large deep foundation pit bracing members system
Technical field
The present invention relates to the anti-of pattern foundation pit supporting structure field more particularly to a kind of relay of large deep foundation pit bracing members system Fail power transmission component.
Background technique
Construction efficiency can be improved using the type steel support system of pin-connected panel in large deep foundation pit engineering, reduces Construction on Environment Influence.It is well known that conventional axle power compensation device is typically mounted at the end of support construction, can not solve in Large Foundation Pit Axial force of the supports is unevenly distributed, the big problem of adjustment difficulty.And the steel support structure of overlength exist with temperature change and it is flexible with And axle power, the problems such as spatial distribution is uneven, the performance for influencing bracing members efficiency even jeopardizes the safety of support system, therefore needs Built-up shaft force compensating device and corresponding adjusting method are set in bracing members system, adapt to wanting for Large Scale Deep Foundation Pit Support It asks.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of the anti-of the relay of large deep foundation pit bracing members system Fail power transmission component, can effectively solve the problem that axial force of the supports is unevenly distributed in Large Foundation Pit, the big problem of adjustment difficulty.
In order to realize the above technical effect, the invention discloses a kind of the anti-of the relay of large deep foundation pit bracing members system Fail power transmission component, and bracing members system includes the bracing members being supported in foundation pit, and the bracing members include at least one first support Unit and one second support unit, first support unit are abutted each other with second support unit along same axis;
Relay include the relaying jack being installed between first support unit and second support unit, And it is installed on the power transmission component on the outside of the relaying jack, the first end of the power transmission component is to first support unit Direction, which extends, to be simultaneously fixedly connected with first support unit, and the second end of the power transmission component is to the second support unit side It is slidably connected to extension and with second support unit;The power transmission component includes set on opposite the two of the relaying jack The first force transmitting board and the second force transmitting board of side, the first end and institute of the first end of first force transmitting board and second force transmitting board It states the first support unit to be fixedly connected, the second end of the second end of first force transmitting board and second force transmitting board and described the Two support units are slidably connected.
A further improvement of the present invention lies in that first support unit and second support unit are i shaped steel, The first end of first force transmitting board and the first end of second force transmitting board and the wing plate of first support unit are fixed;Institute The two sides for stating the second end of the first force transmitting board are equipped with the first connecting plate, and the two sides of the second end of second force transmitting board are equipped with second Connecting plate, first connecting plate are connect with second connecting plate by fastener, and first force transmitting board, described second pass Power plate, first connecting plate and second connecting plate are enclosed for the sliding slipping space set of second support unit.
A further improvement of the present invention lies in that between first force transmitting board and second support unit and described Antifriction separation layer is equipped between two force transmitting boards and second support unit.
A further improvement of the present invention lies in that the antifriction separation layer is anti-friction agent.
A further improvement of the present invention lies in that the second end of the second end of first force transmitting board and second force transmitting board The corresponding mounting hole offered for installing locking part between the wing plate of the second support unit.
A further improvement of the present invention lies in that first force transmitting board and second force transmitting board respectively include being oppositely arranged The first angle steel and the second angle steel in the wing plate two sides of the wing plate and second support unit of first support unit, it is described Angle cleat is connected between first angle steel and second angle steel.
The present invention due to use above technical scheme, make it have it is following the utility model has the advantages that
1, for relay using relaying jack and power transmission component composition, the first end of power transmission component is fixing end, with the One support unit is fixedly connected, and the second end of power transmission component is free end, is slidably connected with the second support unit, is utilized power transmission group Part can guarantee effective transmitting of the axial force to relaying jack;
2, power transmission component one end is fixed, and one end sliding constitutes the force transfer structure for being similar to simply supported beam, allows to relay jack Axial free movement, and play the role of sharing moment of flexure and shearing at bracing members connecting node, guarantor is played to relaying jack Shield effect;
3, antifriction is arranged in order to reduce friction, between power transmission component and the first support unit and the second support unit to be isolated Layer reduces frictional resistance, it is ensured that freely transmitting for the axial force for relaying jack;
4, in the case where relaying jack failure conditions, power transmission component can be connected by screw bolts or weld and first in sliding side Support unit is fixed, and substitution relaying jack transmits axle power.
Detailed description of the invention
Fig. 1 is the schematic diagram of the large deep foundation pit bracing members system in the present invention.
Fig. 2 is the part elevation schematic diagram of the large deep foundation pit bracing members system in the present invention.
Fig. 3 is a kind of solid of the anti-failure power transmission component of the relay of large deep foundation pit bracing members system point of the present invention Solution structure schematic diagram.
Fig. 4 is a kind of facade knot of the anti-failure power transmission component of the relay of large deep foundation pit bracing members system of the present invention Structure schematic diagram.
Fig. 5 is a kind of vertical view knot of the anti-failure power transmission component of the relay of large deep foundation pit bracing members system of the present invention Structure schematic diagram.
Fig. 6 is the A-A diagrammatic cross-section of Fig. 4.
Fig. 7 is the B-B diagrammatic cross-section of Fig. 4.
Specific embodiment
With reference to the accompanying drawing and specific embodiment the present invention is described in further detail.
Firstly, large deep foundation pit bracing members system is mainly by support construction, 21 and of purlin structure refering to fig. 1 and shown in Fig. 2 Axle power compensation system composition.Purlin structure 21 is arranged one week along foundation pit wall 10, and the bottom of purlin structure 21 is equipped with A-frame 211, it is used to support and positions purlin structure 21, as shown in Figure 2;In the corner of purlin structure 21, angle brace 212 can also be set, As shown in Figure 1, to reinforce purlin structure 21 with the overall stability of foundation pit wall 10.Support construction includes being supported in purlin structure Bracing members 11 in 21 and the vertical supporting 12 being supported between 11 bottom of bracing members and bottom of foundation ditch, bracing members 11 are used to support Foundation pit wall 10 prevents foundation pit deformation of wall from collapsing, and vertical supporting 12 plays the role of supporting bracing members 11.Bracing members 11 into one Step includes at least one first support unit 111 and one second support unit 112, and the first support unit 111 and the second support list Member 112 is abutted each other along same axis.
The axle power compensation system of large deep foundation pit bracing members system in the present invention is mainly by being mounted on the ends of bracing members 11 The hydraulic servo device 13 in portion and be mounted between the first support unit 111 and the second support unit 112 14 liang of relay Part forms, and the hydraulic servo device 13 for being mounted on 11 end of bracing members is main servo-system, is mounted on the first support unit 111 Relay 14 between the second support unit 112 is auxiliary servo-system, and hydraulic servo device 13 and relay 14 are assisted Same-action, the common axle power compensation and adjustment for completing foundation pit steel support 11.
Hydraulic servo device 13 includes being connected to the end jack of 11 end of bracing members and connecting with end jack Hydrauservo System, the end jack are hydraulic jack, can control the end jack by Hydrauservo System Axle power.It, can be in purlin knot in order to avoid the recoil that end jack pair purlin structure 21 generates damages purlin structure 21 One segment type steel strengthening segment 22 is further set between structure 21 and end jack, and the recoil to avoid end jack is directly made With the balance for destroying purlin structure 21 in purlin structure 21, diagonal brace may further be set in the two sides of the fashioned iron strengthening segment 23 carry out supporting.
Relay can solve bracing members axle power in Large Foundation Pit and be unevenly distributed as emphasis of the invention, and adjustment is difficult Spend big problem.As shown in fig.3, relay includes relaying jack 140 and power transmission component, wherein relaying jack 140 It for hydraulic jack, is installed between the first support unit 111 and the second support unit 112, and relaying jack 140 can be with end The Hydrauservo System of portion's jack connects, and utilizes the axle power of Hydrauservo System Collaborative Control relaying jack 140.Power transmission group Part is set to the outside of relaying jack 140, the first end of power transmission component extend to 111 direction of the first support unit and with first Support unit 111 is fixedly connected, the second end of power transmission component extend to 112 direction of the second support unit and with the second support unit 112 are slidably connected.In the present embodiment, power transmission component includes the first force transmitting board set on the opposite sides of relaying jack 140 141 and second force transmitting board 142, the first end and the first support unit of the first end of the first force transmitting board 141 and the second force transmitting board 142 111 are fixedly connected, and the second end of the second end of the first force transmitting board 141 and the second force transmitting board 142 and the second support unit 112 slide Connection, and the second end for relaying jack 140 is that hydraulic thrust supports end, power transmission component one end is fixed as a result, and one end sliding is constituted Similar to the force transfer structure of simply supported beam, allow to relay 140 axial free movement of jack, and play and share the first support unit 111 and second support unit 112 connecting node at moment of flexure and shearing effect, to relaying jack 140 can also play guarantor Shield effect.
Cooperate shown in Fig. 4~7, in the present embodiment, the first support unit 111 and the second support unit 112 use I-shaped Fashioned iron respectively includes web and the wing plate set on web two sides.The first end of first force transmitting board 141 and the second force transmitting board 142 First end and the wing plate of the first support unit 111 are bolted to connection;By the first force transmitting board 141 first end, Correspondence opens up the bolt hole worn for bolt on the wing plate of the first end of two force transmitting boards 142 and the first support unit 111, by first The first end of force transmitting board 141 fits in the upper surface of the upper flange of the first support unit 111, then fixes the two using bolt and connect It connects;Likewise, the first end of the second force transmitting board 142 to be fitted in the lower surface of the lower wing plate of the first support unit 111, then use The two is fixedly connected by bolt.
The two sides of the second end of first force transmitting board 141 are equipped with the first connecting plate 151, the second end of the second force transmitting board 142 Two sides are equipped with the second connecting plate 152, the first connecting plate 151 and the second connecting plate 152 and are made of L-type angle steel, and the one of L-type angle steel Side and the first connecting plate 151 and the second connecting plate 152 weld, the L-type angle steel on the first connecting plate 151 and the second connecting plate 152 Another side be bonded to each other and offer bolt hole respectively, be fixedly connected using fastener, such as bolt, so that the first power transmission Plate 141, the second force transmitting board 142, the first connecting plate 151 and the second connecting plate 152 are enclosed to be set for the second support unit 112 cunning Slipping space 16.Second support unit 112 is slidedly arranged in slipping space 16, realizes that the hydraulic thrust of relaying jack 140 supports end Axial free movement, and share the first support unit 111 and the moment of flexure at the connecting node of the second support unit 112 and cut Power plays a protective role to relaying jack 140;Relaying jack 140 can be effectively kept using slipping space 16 simultaneously It is axially moved track, it is ensured that effective transmitting of axle power.Further, in order to reduce the second support unit rubbing in slipping space 16 It wipes, divides between the second force transmitting board 142 and the second support unit 112 between the first force transmitting board 141 and the second support unit 112 Not She You antifriction separation layer, which can be inner surface and second force transmitting board 142 coated on the first force transmitting board 141 The anti-friction agent of inner surface is further ensured that freely transmitting to the axial force of relaying jack 140.
In the present embodiment, the first force transmitting board 141 and the second force transmitting board 142, which are respectively adopted, is relatively arranged on the first support list The first angle steel 191 and the second angle steel 192 of the two sides of the wing plate of the wing plate and the second support unit 112 of member 111, in the first angle steel 191 and second are connected by angle cleat 193 between angle steel 192, and the first angle steel 191 and the second angle steel 192 are respectively L-type angle Steel, bolt hole are provided with the surface of L-type angle steel.
The first end of relaying jack 140 keeps structure to connect with the first support unit 111 by a first axle, this It includes set on the first end plate 181 of the first end of relaying jack 140, set on the first support unit 111 that one axis, which keeps structure, End the second end plate 182 and the First Transition plate 183 that is connected between first end plate 181 and the second end plate 182;In Second end after jack 140 keeps structure to connect with the second support unit 112 by a second axis, which keeps Structure includes set on the third end plate 184 of the second end of relaying jack 140, set on the of the end of the second support unit 112 Four end plates 185 and the second transition plates 186 being connected between third end plate 184 and the 4th end plate 185.Utilize first axle Keep structure and second axis that structure is kept to may insure the axis of relaying jack 140 and first support unit at its both ends 111 and second the axis of support unit 112 on the same line or be parallel to each other, and overcome due to 111 He of the first support unit Both caused by the end out-of-flatness of second support unit 112 and relaying jack 140 can not smooth connection defect.Into one Step, between first end plate 181 and the surrounding corner of the second end plate 182 and the surrounding of third end plate 184 and the 4th end plate 185 Bolt is respectively adopted between corner to be attached, to reinforce the knot that first axle keeps structure and first axle keeps structure itself Structure intensity.
Further, can be in the case where relaying jack failure conditions, power transmission component can be connected by screw bolts or weld in sliding side It connects, substitution relaying jack transmits axle power.When being connected by screw bolts, only need in advance the of the first force transmitting board of power transmission component The corresponding installation offered for installing locking part between the second end of two ends and the second force transmitting board and the wing plate of the second support unit Hole is fixed, easy to use, significant effect in the case where relaying jack failure conditions with locking part, such as bolt.
The anti-failure power transmission component of the relay of large deep foundation pit bracing members system of the present invention is by being mounted on foundation pit steel The hydraulic servo device of supporting base end portion and the relay being mounted among foundation pit steel support act synergistically, common to complete foundation pit steel The axle power of support compensates and adjustment;Wherein, relay is formed using relaying jack and power transmission component, and the first of power transmission component End is fixing end, is fixedly connected with the first support unit, and the second end of power transmission component is free end, is slided with the second support unit Effective transmitting of the axial force to relaying jack can be effectively ensured using power transmission component for connection;Power transmission component one end is fixed, One end sliding, constitutes the force transfer structure for being similar to simply supported beam, allows to relay jack axial free movement, and play and share steel branch The effect for supportting the moment of flexure and shearing at connecting node, plays a protective role to jack;In order to reduce friction, power transmission component and the Anti-friction agent is set between one support unit and the second support unit, guarantees freely transmitting to the axial force of relaying jack;Into One step, in the case where relaying jack failure conditions, power transmission component can be connected by screw bolts or weld in sliding side solid with bracing members Fixed, substitution relaying jack transmits axle power.
Axle power compensation is carried out using the anti-failure power transmission component of the relay of large deep foundation pit bracing members system of the present invention Construction it is as follows:
(1) pit earthwork excavates, and installs purlin structure, and assembled foundation pit steel support installs hydraulic servo device, installation relaying Device.
(2) start Hydrauservo System, first adjust the pressure of the end jack of hydraulic servo device to design value 70%, the relaying jack of relay is then adjusted, keeps the pressure value of two groups of jack equal, and is equal to design value.
(3) during foundation pit construction, when pressure is less than design value in the middle part of bracing members system, start Hydrauservo System, Relaying jack is first adjusted, makes its pressure increase to the 110% of design value, then adjustment end jack, makes two groups of jack Pressure be equal to design value.When pressure is greater than design value in the middle part of bracing members system, start Hydrauservo System, first adjusts relaying Jack reduces its pressure to the 90% of design value, and then end jack, makes the pressure of two groups of jack be equal to design Value.
Compared with prior art, the anti-failure power transmission component tool of the relay of large deep foundation pit bracing members system of the present invention It has the following advantages:
The anti-failure power transmission component of the relay of large deep foundation pit bracing members system is to bracing members system through the invention Axle power compensation is carried out using hydraulic jack, the active control to foundation pit deformation may be implemented, reduces foundation pit construction to environment It influences;
By hydraulic servo device and the mutually coordinated effect of relay, large deep foundation pit overlength bracing members knot can be overcome The problem of structure Stress non-homogeneity is distributed, solves the problems, such as the temperature benefit and compatibility of deformation in bracing members system use process.
It is described the invention in detail above in conjunction with accompanying drawings and embodiments, those skilled in the art can basis Above description makes many variations example to the present invention.Thus, certain details in embodiment should not constitute limitation of the invention, The present invention will be using the range that the appended claims define as protection scope of the present invention.

Claims (6)

1. a kind of anti-failure power transmission component of the relay of large deep foundation pit bracing members system, bracing members system includes being supported in Bracing members in foundation pit, the bracing members include at least one first support unit and one second support unit, first support Unit is abutted each other with second support unit along same axis, it is characterised in that: relay includes being installed on described the Relaying jack between one support unit and second support unit and the biography being installed on the outside of the relaying jack The first end of power component, the power transmission component extends to first support unit direction and fixes with first support unit The second end of connection, the power transmission component, which extends to second support unit direction and slides with second support unit, to be connected It connects;
The power transmission component includes the first force transmitting board and the second force transmitting board set on the opposite sides of the relaying jack, described The first end of first force transmitting board and the first end of second force transmitting board are fixedly connected with first support unit, and described first The second end of force transmitting board and the second end of second force transmitting board are slidably connected with second support unit.
2. the anti-failure power transmission component of the relay of large deep foundation pit bracing members system as described in claim 1, feature Be: first support unit is i shaped steel, the first end of first force transmitting board and institute with second support unit The wing plate of the first end and first support unit of stating the second force transmitting board is fixed;The two sides of the second end of first force transmitting board Equipped with the first connecting plate, the two sides of the second end of second force transmitting board are equipped with the second connecting plate, first connecting plate and institute It states the second connecting plate to connect by fastener, first force transmitting board, second force transmitting board, first connecting plate and described Second connecting plate is enclosed for the sliding slipping space set of second support unit.
3. the anti-failure power transmission component of the relay of large deep foundation pit bracing members system as claimed in claim 2, feature It is: between first force transmitting board and second support unit and second force transmitting board and second support unit Between be equipped with antifriction separation layer.
4. the anti-failure power transmission component of the relay of large deep foundation pit bracing members system as claimed in claim 3, feature Be: the antifriction separation layer is anti-friction agent.
5. the anti-failure power transmission component of the relay of large deep foundation pit bracing members system as claimed in claim 2, feature Be: the wing plate of the second end of first force transmitting board and the second end of second force transmitting board and second support unit it Between the corresponding mounting hole offered for installing locking part.
6. the anti-failure power transmission component of the relay of large deep foundation pit bracing members system as claimed in claim 2, feature Be: first force transmitting board and second force transmitting board respectively include the wing plate for being relatively arranged on first support unit and The first angle steel and the second angle steel of the wing plate two sides of second support unit, between first angle steel and second angle steel It is connected with angle cleat.
CN201710235286.5A 2016-01-13 2016-01-13 The anti-failure power transmission component of the relay of large deep foundation pit bracing members system Active CN106978813B (en)

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CN201610019010.9A CN105569053B (en) 2016-01-13 2016-01-13 A kind of axle power compensation system of large deep foundation pit bracing members system
CN201710235286.5A CN106978813B (en) 2016-01-13 2016-01-13 The anti-failure power transmission component of the relay of large deep foundation pit bracing members system

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CN106978813B true CN106978813B (en) 2019-05-17

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CN201710235249.4A Active CN106869140B (en) 2016-01-13 2016-01-13 A kind of relay for the compensation of large deep foundation pit bracing members system axle power
CN201710235286.5A Active CN106978813B (en) 2016-01-13 2016-01-13 The anti-failure power transmission component of the relay of large deep foundation pit bracing members system
CN201610019010.9A Active CN105569053B (en) 2016-01-13 2016-01-13 A kind of axle power compensation system of large deep foundation pit bracing members system

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CN106638614B (en) * 2016-11-11 2019-01-18 上海市机械施工集团有限公司 A kind of the dynamic regulation system and dynamic regulation method of two-way steel support structure
CN106522240B (en) * 2016-11-11 2019-03-12 上海市机械施工集团有限公司 A kind of two-way bracing members are synchronous to apply prestressed construction method
CN106522238A (en) * 2016-11-11 2017-03-22 上海市机械施工集团有限公司 Axial loading method for steel supports
CN106638623B (en) * 2017-02-20 2018-07-27 长江勘测规划设计研究有限责任公司 Load-compensating support device and method
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CN110965560A (en) * 2019-12-31 2020-04-07 上海市机械施工集团有限公司 Foundation pit steel supporting structure and foundation pit steel supporting system
CN111877357B (en) * 2020-07-12 2022-02-08 福建岩土工程勘察研究院有限公司 Deep foundation pit concrete support axial force compensation method
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CN106869140A (en) 2017-06-20
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CN106869140B (en) 2019-03-08
CN105569053B (en) 2017-08-04

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