CN207062932U - Armored concrete diaphram wall - Google Patents

Armored concrete diaphram wall Download PDF

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Publication number
CN207062932U
CN207062932U CN201720987439.7U CN201720987439U CN207062932U CN 207062932 U CN207062932 U CN 207062932U CN 201720987439 U CN201720987439 U CN 201720987439U CN 207062932 U CN207062932 U CN 207062932U
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China
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hole
bearing plate
steel strand
strand wires
sleeve pipe
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CN201720987439.7U
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刘佩锟
张俊杰
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Ningbo Metallurgical Investigation & Design Research Co Ltd
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Ningbo Metallurgical Investigation & Design Research Co Ltd
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Abstract

The utility model discloses a kind of armored concrete diaphram wall, including wall and two row's longitudinal reinforcements of the length direction extension along wall:A placing of reinforcement wherein close to no-dig technique side is nonprestressed reinforcement, close to the placing of reinforcement for excavating side cloth muscle is mixed for the deformed bar and nonprestressed reinforcement of post stretching, the deformed bar refers to steel strand wires, sleeve pipe is equipped with outside every steel strand wires, have between steel strand wires and sleeve pipe for the vertically movable gap of steel strand wires, sleeve pipe upper and lower ends have the concrete mix for preventing flowing to penetrate into ensure the vertically movable device of steel strand wires energy, steel strand wires bottom and top are connected with anchor, it is additionally provided with when compressing bearing plate when enabling extruding anchor tensioning and dismantle and disengages bearing plate and sleeve pipe to extract the device of steel strand wires out;The utility model diaphram wall can strengthen its bending rigidity and anti-bending bearing capacity and non-deformability, and and can reduces amount of reinforcement, recovery steel strand wires, reduces consumptive material so as to reduce construction cost.

Description

Armored concrete diaphram wall
Technical field
Engineering construction technology field is the utility model is related to, is especially a kind of armored concrete diaphram wall.
Background technology
Large-scale as excavation area is more than foundation ditch of 27 square metres of deep basal pits such as cutting depth more than 10 meters i.e. commonly referred to as During large deep foundation pit excavates, the wall of foundation pit supporting construction generally use armored concrete diaphram wall adds the knot of inner support Structure, the quantity of its inner support are typically determined according to the depth of excavation, more up to 4~5 to be arranged above and below.In many situations Under, because cutting depth is big, such as 40 meters or so, the level of its wall generally requires 800~1000mm to thickness, except level is to i.e. Outside horizontal nonprestressed reinforcement, configuration it is vertical to i.e. longitudinal nonprestressed reinforcement be along wall length direction extend two rows: The row of side one is not excavated close to no-dig technique side or, close to the excavation row of side one, and be usually to keep to the side to arrange.Due to armored concrete Diaphram wall is main barrier structure, to bear the larger no-dig technique side i.e. compression of compressive region and excavate side i.e. tension The tension in area.To reduce its flexural deformation, improving rigidity, prior art armored concrete diaphram wall is by improving longitudinal direction Nonprestressed reinforcement cross-sectional area, such as equally it is the nonprestressed reinforcement using 25~32mm of diameter, but needs to increase longitudinal direction The quantity of nonprestressed reinforcement, reduce often arrange in the distance between two reinforcing bars increase density to solve.Therefore prior art The amount of reinforcement of armored concrete diaphram wall is larger, and consumptive material is more, and construction cost is high.Further, armored concrete underground connects Continuous wall is used as temporary structure, after the completion of the major project of affiliated building because nonprestressed reinforcement with concrete anchoring, It is extremely difficult or completely uneconomic to want to remove and recycle these reinforcing bars, so, these armored concrete in practice Nonprestressed reinforcement in diaphram wall is all discarded, so as to cause the waste of whole reinforcing bars.
Utility model content
The technical problems to be solved in the utility model be to provide one kind can strengthen its bending rigidity and anti-bending bearing capacity and Non-deformability, and can reduce amount of reinforcement so as to reduce the armored concrete diaphram wall of construction cost.
Technical solution of the present utility model is to provide a kind of armored concrete diaphram wall, including wall and edge At least two row's longitudinal reinforcements of the length direction extension of wall:A placing of reinforcement wherein at least close to no-dig technique side is non-prestressed Reinforcing bar, close to excavate side a placing of reinforcement for post stretching deformed bar and nonprestressed reinforcement mix cloth muscle, it is described it is pre- should Power reinforcing bar refers to steel strand wires, wherein being equipped with sleeve pipe outside every steel strand wires, has between steel strand wires and sleeve pipe vertically movable for steel strand wires Gap, sleeve pipe upper and lower ends have the concrete mix for preventing flowing to penetrate into ensure that steel strand wires can vertically movable dress Put, steel strand wires bottom and top are connected with anchor.
After above structure, the utility model armored concrete diaphram wall can strengthen its bending rigidity and bending resistance Bearing capacity and non-deformability, and can reduce amount of reinforcement, reduce consumptive material so as to reduce construction cost.
As an improvement, the anchor that the steel strand wires bottom is connected with includes a bearing plate, have on bearing plate for steel strand wires The first through hole passed through, the internal diameter of first through hole are more than the external diameter of steel strand wires, fixation outside the steel strand wires bottom on the downside of first through hole There is extruding anchor, described bearing plate, which is additionally provided with, prevents the concrete mix of flowing from penetrating into extruding anchor with bearing plate junction to protect Steel strand wires disengage the protective cover of bearing plate when card needs;Being additionally provided with the bearing plate and protective cover and sleeve pipe makes extruding anchor tensioning When compress bearing plate and bearing plate can be disengaged and be pulled away from the device of wall when dismantling.Because armored concrete diaphram wall is deep Some reaches 40 meters to degree as described above, even if wanting to use post-tensioning prestressed steel such as Ribbed Bar and plain bar, because of length Need to weld may influence construction quality, and the intensity of two kinds of reinforcing bars is still far below steel strand wires in addition, therefore reduces the skill of amount of reinforcement Art positive effect is less than steel strand wires, and if it can not pull down recovery, it, which is reduced, wastes, reduces the technique effect of cost still not It can be protected, but its is disengaged anchoring again after steel strand anchoring as post-tensioning prestressed steel steel and concreting Device recovery is technical barrier, is never resolved for a long time.After above structure, the utility model solves The art unsolved technical problem for a long time:Both it ensure that steel strand wires used increasing as post-tensioning prestressed steel Its strong bending rigidity and anti-bending bearing capacity and non-deformability and amount of reinforcement is reduced so as to reduce the technique effect of construction cost, Deformed bar of the part reinforcing bar i.e. as longitudinal direction in armored concrete diaphram wall whole reinforcing bar is accomplished to reclaim again (price of a steel strand wires of same length is usually 26 times of the price of the PVC sleeve pipes of a following internal diameters to steel strand wires, institute To reclaim the positive effect of steel strand wires), wasted so as to reduce, further save construction cost.
As improving again, what the bearing plate and protective cover and sleeve pipe were provided with make compress bearing plate during extruding anchor tensioning and The first structure that can be disengaged bearing plate during dismounting and be pulled away from the device of wall is as follows:The bearing plate bottom has one to be used for The circular indent of first through hole bottom is radially offset from the top of accommodating extruding anchor to prevent extruding anchor, bearing plate is provided with internal diameter more than crowded The second through hole of anchor maximum gauge is pressed, there is transition through hole between first through hole and the second through hole, first through hole, transition through hole and the One has to be snapped down to below the second through hole for an extruding anchor sagging after putting and has tip chute in protective cover immediately below two through holes Carriage;The internal diameter of described sleeve pipe is more than the chi of first through hole transition through hole the second through hole three's line of centres length It is very little.After above structure, as the steel strand wires that post-tensioning prestressed steel uses in tensioning due to the effect of circular indent Extruding anchor can not be radially offset from first through hole bottom, so can play bending rigidity and anti-bending bearing capacity and resistance after stretch-draw anchor Shape ability and the technique effect for reducing amount of reinforcement;When needing dismounting after the completion of the major project of affiliated building, put a steel and twist Line is simultaneously exerted oneself downwards, then i.e. being capable of smoothly sagging and along tip chute interior table by the gravity extruding anchor of whole steel strand wires itself Face and transition through hole are slided to below the second through hole, then are pulled up, and extruding anchor is disengagable bearing plate and to pull out steel strand wires whole Wall.
Improved as another step, described tip chute inner surface scribbles lubricating grease.Its extruding anchor is to the second through hole direction The effect of slip is more preferable.
As further improving, described tip chute cross section is arc.Its extruding anchor is slided to the second through hole direction Dynamic effect is more preferable.
As still further improving, what the bearing plate and protective cover and sleeve pipe were provided with holds compression during extruding anchor tensioning Pressing plate and bearing plate can be disengaged when dismantling and be pulled away from the device of wall second of structure it is as follows:The bearing plate is provided with interior Footpath is more than the second through hole of extruding anchor maximum gauge, there is transition through hole between first through hole and the second through hole, on the protective cover Provided with by extruding anchor to the rubber band pulled with the second through hole opposite direction, first through hole, transition through hole and the second through hole just under One has to be snapped down to below the second through hole for the extruding anchor after the disconnected rubber band of sagging after putting an and pendant and has inclination in the protective cover of side The tourelle of raceway;The internal diameter of described sleeve pipe is more than first through hole transition through hole the second through hole three's line of centres length Size.After above structure, as the steel strand wires that post-tensioning prestressed steel uses in tensioning due to the pulling of rubber band Effect extruding anchor can not be radially offset from first through hole bottom, so can be played after stretch-draw anchor bending rigidity and anti-bending bearing capacity and Non-deformability and the technique effect for reducing amount of reinforcement;When needing dismounting after the completion of the major project of affiliated building, put to open and be somebody's turn to do Steel strand wires are simultaneously exerted oneself downwards, then by the gravity extruding anchor of whole steel strand wires itself can easily pull apart rubber band and smoothly under Hang down and be rolled to or slide to below the second through hole along inclined races and transition through hole, then pull up, extruding anchor is disengagable pressure-bearing Plate and steel strand wires is pulled out whole wall.
As still further improving again, what the bearing plate and protective cover and sleeve pipe were provided with makes to compress during extruding anchor tensioning Bearing plate and bearing plate can be disengaged when dismantling and be pulled away from the device of wall the third structure it is as follows:The extruding anchor bottom has Convex latch, bearing plate bottom have a depth be more than plug pin lengths and diameter be more than pin diameter be used to house latch with Anti-extrusion anchor is radially offset from the blind hole of first through hole bottom, and bearing plate is provided with second of internal diameter more than extruding anchor maximum gauge and led to , there is a transition through hole in hole between first through hole and the second through hole, the protective cover immediately below first through hole, transition through hole and the second through hole Interior one has the closed carriage for having tip chute being snapped down to for an extruding anchor sagging after putting below the second through hole;It is described Sleeve pipe internal diameter be more than first through hole transition through hole the second through hole three's line of centres length size.Using above structure Afterwards, as the steel strand wires that post-tensioning prestressed steel uses in tensioning because the effect extruding anchor of latch can not be radially offset from One via bottoms, so bending rigidity and anti-bending bearing capacity and non-deformability can be played after stretch-draw anchor and reduce amount of reinforcement Technique effect;When needing dismounting after the completion of the major project of affiliated building, put a steel strand wires and exert oneself downwards, then by whole The gravity extruding anchor of root steel strand wires itself i.e. can be smoothly sagging and slided to along chute and transition through hole below the second through hole, then to Pull-up, extruding anchor are disengagable bearing plate and steel strand wires is pulled out whole wall.
Improved as a more step again, the closed carriage is equipped with lubricating oil.Its extruding anchor is to the second through hole direction Sliding effect is more preferable.
As also further improving, the hole wall of described transition through hole and the second through hole for cambered surface and scribbles lubricating grease. Its extruding anchor is more preferable to the second through hole direction sliding effect.
As further improving again, the nonprestressed reinforcement is arranged at intervals with steel strand wires.Enhancing bending rigidity can be made It is more preferable with anti-bending bearing capacity and non-deformability and the technique effect for reducing amount of reinforcement.
Brief description of the drawings
Fig. 1 is that longitudinal sectional structure of the utility model armored concrete diaphram wall embodiment is intended to.
Fig. 2 is that the horizontal sectional structure of the utility model armored concrete diaphram wall embodiment is intended to.
Fig. 3 is the master of the first embodiment of the utility model armored concrete diaphram wall bottom anchor It is intended to depending on sectional structure.
Fig. 4 is common in the three kinds of embodiments of anchor of the utility model armored concrete diaphram wall bottom Bearing plate plan structure be intended to.
Fig. 5 is in the utility model armored concrete diaphram wall bottom anchor the first embodiment Carriage front view structure is intended to.
Fig. 6 is in second of the embodiment of anchor of the utility model armored concrete diaphram wall bottom Tourelle front view structure is intended to.
Fig. 7 is the master of the utility model armored concrete diaphram wall bottom second of embodiment of anchor It is intended to depending on sectional structure.
Fig. 8 is the master of the third embodiment of the utility model armored concrete diaphram wall bottom anchor It is intended to depending on sectional structure.
Fig. 9 is in the utility model armored concrete diaphram wall bottom anchor the third embodiment Closed carriage front view structure is intended to.
1, wall shown in figure, 2, socket reinforcing bar, 3, nonprestressed reinforcement, 4, the anchor of upper end, 5, inner support, 6, Steel strand wires, 7, closure, 8, support, 9, lower flange, 10, bearing plate, 11, upper flange, 12, adapter sleeve, 13, plastic tube, 14, circle Connected in star, 15, extruding anchor, 16, carriage, the 17, second through hole, 18, transition through hole, 19, first through hole, 20, carriage Upper head plate, 21, the chute of carriage, 22, the bottom plate of carriage, 23, retainer ring, 24, rubber band, 25, roll dress Put, 26, the upper head plate of tourelle, 27, the bottom plate of tourelle, 28, the side plate of tourelle, 29, the rolling of tourelle Cylinder, 30, closed carriage, 31, latch, 32, pin hole, 33, support bar, 34, the upper head plate of closed carriage, 35th, the chute of closed carriage, 36, the side plate of closed carriage, 37, the bottom plate of closed carriage, 38, The side plate of carriage.
Embodiment
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings.Herein it is to be understood that, It is used to help understand the utility model for the explanation of these embodiments, but does not form to restriction of the present utility model.This Outside, if technical characteristic involved in the various embodiments of the utility model disclosed below and technological means each other it Between do not form conflict can be mutually combined.
As shown in Figure 1 and Figure 2, the utility model armored concrete diaphram wall falls within situations below:In big moldeed depth base The structure of the wall 1 of foundation pit supporting construction generally use armored concrete diaphram wall plus inner support 5 during hole is excavated, branch in it The quantity of support 5 is typically determined according to the depth of excavation, more up to 4~5 to be arranged above and below.Inner support 5 and diaphram wall Steel reinforcement cage anchoring.Under many circumstances, because cutting depth is big, such as 40 meters or so, the level of its wall typically needs to thickness Want 800~1000mm, except level is in addition to i.e. horizontal nonprestressed reinforcement 3, configuration it is vertical to i.e. longitudinal nonprestressed reinforcement 3 one As be along wall 1 length direction extend two rows:Close to the row of no-dig technique side one, close to the excavation row of side one, described no-dig technique Side also has title not excavate side.It is wherein at least close as at least two row's longitudinal reinforcements for including the length direction extension along wall 1 One placing of reinforcement of no-dig technique side is nonprestressed reinforcement, and the words should do such understanding:Can also be the length along wall Three rows of direction extension etc., centre can also have row etc..But it is preferably two rows below this specific implementation, and lean on Side is arranged.The reinforcing bar 2 etc. that sockets of transverse steel, longitudinal reinforcement and bar-mat reinforcement forms steel reinforcement cage, the steel reinforcement cage and wall of inner support 5 Steel reinforcement cage anchoring.These are all prior arts, are not inventive points of the present utility model, so, it is not described in detail.
As indicated with 2, the utility model armored concrete diaphram wall, including wall 1 and prolong along the length direction of wall 1 The two row's longitudinal reinforcements stretched:A placing of reinforcement wherein close to no-dig technique side is nonprestressed reinforcement 3, close to the row's steel for excavating side Muscle mixes cloth muscle for the deformed bar and nonprestressed reinforcement 3 of post stretching.Those skilled in the art know that excavation area is tension Area, wall 1, to excavate side, make within the walls close to the side of excavation area after excavation in the earth lateral pressure not excavated and other load actions Side produces tension;No-dig technique area is compressive region, and wall 1 is no-dig technique side close to the side in no-dig technique area, and no-dig technique side produces Compression.The deformed bar uses steel strand wires 6.The nonprestressed reinforcement 3 is with steel strand wires 6 preferably by setting.Certainly, Also can the mode as two steel strand wires, another root nonprestressed reinforcement, two steel strand wires again arrange.
As shown in Fig. 1, Fig. 3, Fig. 7, Fig. 8, the utility model is used as the steel strand wires 6 of post-tensioning prestressed steel, belongs to nothing One kind in binding prestress reinforcement reinforcing bar.Wherein sleeve pipe 13 is equipped with outside every steel strand wires 6.Typical non-binding deformed bar Using flexible plastic tube, anti-corrosive grease is scribbled in deformed bar outer surface.And the utility model is connected due to armored concrete underground Continuous wall is temporary structure, no life requirement, so present embodiment middle sleeve 13 uses common PVC pipe, prestressing force Anti-corrosive grease is not also applied outside reinforcing bar, its price is cheap.Have between steel strand wires 6 and sleeve pipe 13 for steel strand wires it is vertically movable between Gap.Described steel strand wires 13 stretch out the upper surface of wall 1 being pre-designed, and leave for tensioning and set the position of anchor, push up The tensioning fixing device in portion or the anchor 4 of upper end can use the intermediate plate anchorage of prior art.
It can be seen from general knowledge, deformed bar post stretching wants first casting concrete, design strength to be achieved 75% after Prestressed reinforcement of tensioning such as steel strand wires are to form prestressed concrete member again.So during casting concrete, if there is concrete stream Dynamic mixture is penetrated into sleeve pipe, has been solidified when to be tensioned and has been produced anchorage effect, can not be vertically movable during tensioning, it is impossible to realize Tension technology effect.As shown in Fig. 1, Fig. 3, Fig. 7, Fig. 8, the anti-coagulation of the bottom of the steel strand wires 6 of present embodiment It is sealing device that soil flowing mixture, which penetrates into device,.Its concrete structure is that the lower end outer wall of sleeve pipe 13 is provided with external screw thread, following Anchorage be that bearing plate 10 is provided with upper flange 11, the external diameter of the upper flange 11 of bearing plate 10 is equal with the external diameter of the lower end of sleeve pipe 3, The upper flange 11 of bearing plate 10 it is cylindrical on also be provided with external screw thread, the external screw thread of the lower end of sleeve pipe 13 and the upper flange 11 of bearing plate 10 External screw thread by tapped adapter sleeve thread seal.Certainly, the threaded connection place can twine sealant tape, and this is known normal Know, also repeat no more below.There is the concrete mix for preventing flowing to penetrate into ensure that steel strand wires can erect as the upper end of sleeve pipe 13 To mobile device, typically there is several structures, can make sleeve pipe 10 directly stretch out on armored concrete diaphram wall pour it is mixed Its gap is blocked in solidifying native surface with soft thing again prevents the concrete mix of flowing from penetrating into;Or utilize and be located at the upper surface of wall 1 Tensioning fixing device or upper end anchor 4 block its gap prevent flowing concrete mix penetrate into;Or profit Covering its gap with the anchor protective cover (not shown) for being located at the upper surface of wall 1 prevents the concrete mixing of flowing Thing penetrates into.
As shown in Fig. 3, Fig. 4, Fig. 7, Fig. 8, the bottom of steel strand wires 6 as post-tensioning prestressed steel is connected with anchoring dress Put.The anchor includes a bearing plate 10, has the first through hole 19 passed through for steel strand wires 6 on bearing plate 10.First through hole Extruding anchor 15 is fixed with the bottom of steel strand wires 6 of 19 downsides.After steel strand wires 6 pass through first through hole 19 during practical operation, steel strand wires 6 Bottom on be cased with steel bushing, then by steel bushing crimp, known in industry, the diameter in extrusion process of extruding anchor 15 diminishes and grown Degree increase.The diameter of general first through hole 19 is more than the 1~2mm of diameter of steel strand wires 6.Bearing plate 10 can be that one piece of thickness is 20mm Square plate.First through hole 19 can be located at the center of bearing plate 10.
As shown in Fig. 3, Fig. 7, Fig. 8, described bearing plate 10 prevents the concrete of flowing from mixing when being additionally provided with casting concrete Steel strand wires can disengage the protective cover of bearing plate when compound penetrates into extruding anchor 6 and the junction of bearing plate 10 to ensure to need.Protective cover It is divided into protective cover and low protection cover.The concrete structure of upper protective cover is in epimere introduction:The lower end outer wall of sleeve pipe 13 is provided with External screw thread, bearing plate 10 are provided with upper flange 11, and the external diameter of the upper flange 11 of bearing plate 10 is equal with the external diameter of the lower end of sleeve pipe 13, The upper flange 11 of bearing plate 10 it is cylindrical on also be provided with external screw thread, the external screw thread of the lower end of sleeve pipe 13 and the upper flange 11 of bearing plate 10 External screw thread by the tapped thread seal of adapter sleeve 12.The structure both sealed to the above-mentioned lower end of sleeve pipe 13, also simultaneously right Extruding anchor 13 and the junction of bearing plate 10 seal, and are both the sealing device of the lower end of sleeve pipe 13, and bearing plate 10 and prestress steel Muscle is upper protective cover of the extruding anchor 15 with the junction of bearing plate 10 of the lower end of steel strand wires 6.The concrete structure of low protection cover is:Pressure-bearing Plate 10 is provided with lower flange 9, and the cylindrical of the lower flange 9 of bearing plate 10 is provided with external screw thread and is combined with tapped closure 7, The inner bottom surface of closure 7 leaves enough spaces to meet that following extruding anchors 15 falls and set from the bottom face of steel strand wires 6 Carriage 16 or the position of tourelle 25 or closed carriage 30.
As shown in Fig. 3, Fig. 7, Fig. 8, being additionally provided with the bearing plate 10 and protective cover and sleeve pipe 13 makes the tensioning of extruding anchor 15 When compress bearing plate 10 and bearing plate 10 can be disengaged and be pulled away from the device of wall 1 when dismantling.
As shown in Fig. 3, Fig. 4, Fig. 5, what the bearing plate 10 and protective cover and sleeve pipe 13 were provided with makes the tensioning of extruding anchor 15 When compress bearing plate 10 and bearing plate 10 can be disengaged and be pulled away from the first embodiment of the device of wall 1 when dismantling Structure is as follows:The bottom of bearing plate 10 has one to be used to housing the top of extruding anchor 15, and to prevent extruding anchor 15 to be radially offset from first logical The circular indent 14 of the bottom of hole 19.Bearing plate 10 be provided with diameter be more than the maximum gauge of extruding anchor 15 the second through hole 17, first There is transition through hole 18 between the through hole 17 of through hole 19 and second, an actually small sircle hole, a big hole are led to by middle transition Two straight flanges in hole and two circles it is tangent form one it is one large one small have straight flange tangent and the through hole of UNICOM (following two is specific real The mode of applying be also so, it is not reinflated below to say).Protection immediately below first through hole 19,18 and second through hole of transition through hole 17 One has the inclined carriage 16 that the lower section of the second through hole 17 is snapped down to for an extruding anchor sagging after putting, the carriage in cover 16 include the upper head plate 20 of the carriage by first through hole one end, and the side plate 38 of two pieces of carriages forms recessed arc and slided Groove 21, i.e., inclined chute cross section are arc, and so, extruding anchor 15 is more preferable to the direction sliding effect of the second through hole 17.The cunning Dynamic device 16 also includes the bottom plate 22 of the carriage by second through hole one end.The top of upper head plate 20 and bottom plate 22 is solid The fixed bottom surface for being such as welded on bearing plate 10, the bottom of upper head plate 20 are fixed as welded with lower flange 9 through support bar 33, i.e. support bar 33 both ends are fixed as welded with the bottom of upper head plate 20 with lower flange 9 respectively, and the bottom of bottom plate 22 and lower flange 9 are through support 8 fix as welded, that is, support 8 both ends to be fixed respectively with the bottom of bottom plate 22 and lower flange 9 as welded.Described sleeve pipe 13 Internal diameter unify up and down and be all higher than first through hole transition through hole the second through hole three's line of centres length L size.Use with After upper structure, squeezed as the steel strand wires 6 that post-tensioning prestressed steel uses in tensioning because the step of circular indent 14 acts on Pressure anchor 15 top is radially spacing and can not be radially offset from the bottom of first through hole 19 by step, meanwhile, it can be seen from general knowledge, in reinforcing bar After cage ties, before steel strand tension, the tops of steel strand wires be the top of wall 1 be provided with by whole steel strand wires tense upwards zero when Property support, the tensioning and zero when property support does not just work after anchoring, so can be tensed on bearing plate 10 before tensioning, and Bending rigidity and anti-bending bearing capacity and non-deformability are played after stretch-draw anchor and reduces the technique effect of amount of reinforcement;Work as institute Belong to when needing dismounting after the completion of the major project of building, put the steel strand wires 6 and exert oneself downwards, then by whole steel strand wires itself Gravity extruding anchor 15 be can smoothly sagging and chute 21 arcuately and transition through hole 18 slide to below the second through hole 17, then to Pull-up, extruding anchor 15 be disengagable bearing plate 10 and steel strand wires 6 is pulled out whole wall 1.Described inclined arc chute 21 Inner surface scribbles the butter that lubricating grease is such as commonly called as, and so, extruding anchor 15 is more preferable to the direction sliding effect of the second through hole 17.
As shown in Fig. 7, Fig. 4, Fig. 6, what the bearing plate 10 and protective cover and sleeve pipe 13 were provided with makes the tensioning of extruding anchor 15 When compress bearing plate 10 and bearing plate 10 can be disengaged and be pulled away from second of embodiment of the device of wall 1 when dismantling Structure is as follows:The bearing plate 10 be provided with internal diameter be more than the maximum gauge of extruding anchor 15 the second through hole 17, first through hole 19 with There is transition through hole 18 between second through hole 17.The bearing plate 10 be provided with by extruding anchor 15 to the opposite direction of the second through hole 17 The rubber band 24 of pulling, concretely:Rubber band 24 can use little girl to prick the common rubber band that distinguish, with the second through hole 17 The inwall of the flange 9 of opposite direction is upper to install a retainer ring 23, and the one end of rubber band 24 is enclosed in retainer ring 23, and the other end is drawn Tightly on the steel strand wires 6 of bottom.One has for putting in protective cover immediately below first through hole 19,18 and second through hole of transition through hole 17 Extruding anchor 15 after after the disconnected rubber band 24 of sagging and pendant is snapped down to the tourelle 25 of the lower section of the second through hole 17, the tourelle 25 include the upper head plate 26 of the tourelle by first through hole one end, and the biside plate 28 of tourelle forms recessed raceway, roll Road is made up of bearings roller 29.The tourelle 25 also includes the bottom plate of the tourelle by the one end of the second through hole 19 27.The fixed bottom surface for being such as welded on bearing plate 10 in the top of upper head plate 26 and bottom plate 27, the bottom of upper head plate 26 are convex with Edge 9 is fixed as welded through support bar 33, i.e. bottom of the both ends of support bar 33 respectively with upper head plate 26 is fixed as welded with lower flange 9 Connect;The bottom of bottom plate 27 is fixed as welded with lower flange 9 through support 8, that is, supports the 8 both ends bottom with bottom plate 22 respectively Fixed with lower flange 9 as welded.Due to raceway distance, length and width degree is not wide, volume is little, so, material consumption is little.It is described The internal diameter of sleeve pipe 13 unify up and down and be all higher than the three's line of centres length L of 19 18 second through hole of transition through hole of first through hole 17 Size.After above structure, the steel strand wires 6 used as post-tensioning prestressed steel are in tensioning due to rubber band 24 Extruding anchor 15 can not radially move under acting in opposition, will not more be radially offset from the bottom of first through hole 19, meanwhile, according to general knowledge Understand, after steel reinforcement cage ties, before steel strand tension, the tops of steel strand wires be the top of wall 1 be provided with by whole steel strand wires to The zero when property support does not just work after zero when property support of upper tension, tensioning and anchoring, so can be tensed before tensioning On bearing plate 10, and play after stretch-draw anchor bending rigidity and anti-bending bearing capacity and non-deformability and reduce amount of reinforcement Technique effect;When needing dismounting after the completion of the major project of affiliated building, put a steel strand wires 6 and exert oneself downwards, then by whole The gravity extruding anchor 15 of root steel strand wires 6 itself is that can easily pull apart the raceway that rubber band 24 is smoothly sagging and is formed along roller 29 It is rolled to or is understood as with transition through hole 18 to slide to the lower section of the second through hole 17, then pull up, extruding anchor 15 is disengagable bearing plate 10 And steel strand wires 6 are made to pull out whole wall 1.
As shown in Fig. 8, Fig. 4, Fig. 9, what the bearing plate 10 and protective cover and sleeve pipe 13 were provided with makes the tensioning of extruding anchor 15 When compress bearing plate 10 and bearing plate 10 can be disengaged and be pulled away from the third embodiment of the device of wall 1 when dismantling Structure is as follows:The top of extruding anchor 15 has convex latch 31 (should show dotted line in Fig. 8, but it is not clear to scheme too small display It is aobvious), the bottom of bearing plate 10 have a depth be more than the height of latch 31 and diameter be more than the diameter of latch 31 be used for house latch 31 blind holes 32 that the bottom of first through hole 19 is radially offset to prevent extruding anchor 15 (should show dotted line, but scheme too small display not in Fig. 8 Substantially), the purpose that depth is more than is to avoid interference with the compression of extruding anchor 15 and bearing plate 10;Diameter is more than the mesh of the diameter of latch 31 Be installation when latch 31 be easier enter the blind hole 32.Bearing plate 10 is provided with that internal diameter is more than the maximum gauge of extruding anchor 15 Two through holes 17, there is transition through hole 18 between the through hole 17 of first through hole 19 and second, first through hole 19, transition through hole 18 and second are logical One has the setting inclination for being snapped down to the lower section of the second through hole 17 for an extruding anchor 15 sagging after putting to slide in protective cover immediately below hole 17 The closed carriage 30 in road, the closed carriage 30 include the closed carriage for leaning on the one end of first through hole 19 Upper head plate 34, the biside plate 36 of closed carriage form the chute 35 of recessed closed carriage.The closed cunning Dynamic device 30 also includes the bottom plate 37 of the closed carriage by the one end of the second through hole 17.Upper head plate 34, the and of bottom plate 37 The fixed bottom surface for being such as welded on bearing plate 10 at the top of the closed carriage that biside plate 36 is formed, the bottom of upper head plate 34 is with Flange 9 is fixed as welded through support bar 33, i.e. bottom of the both ends of support bar 33 respectively with upper head plate 34 is fixed such as with lower flange 9 Welding, the bottom of bottom plate 37 are fixed as welded with lower flange 9 through support 8, that is, support 8 both ends respectively with bottom plate 37 Portion is fixed as welded with lower flange 9.The internal diameter of described sleeve pipe 13 is unified and is all higher than the transition through hole 18 of first through hole 19 up and down The three's line of centres length L of second through hole 17 size.After above structure, the steel that is used as post-tensioning prestressed steel Twisted wire 6 in tensioning because the effect extruding anchor 15 of latch 31 and hole 32 can not be radially offset from the bottom of first through hole 19, meanwhile, root Understood according to general knowledge, after steel reinforcement cage ties, before steel strand tension, the tops of steel strand wires is that the top of wall 1 is provided with whole steel The zero when property support does not just work after the zero when property support that twisted wire tenses upwards, tensioning and anchoring, so the energy before tensioning Tense on bearing plate 10, and bending rigidity and anti-bending bearing capacity and non-deformability and reduction reinforcing bar are played after stretch-draw anchor The technique effect of dosage;When needing dismounting after the completion of the major project of affiliated building, put a steel strand wires 6 and exert oneself downwards, then I.e. can be smoothly sagging by whole steel strand wires 6 gravity of itself and be slided to along chute 35 and transition through hole 18 under the second through hole 17 Side, then is pulled up, and extruding anchor 15 is disengagable bearing plate 10 and steel strand wires 6 is pulled out whole wall 1.Closed slide fills 30 are put built with lubricating oil, so, extruding anchor 15 is more preferable to the direction sliding effect of the second through hole 17.
The diameter of second through hole 19 can be more than 1~2mm of the maximum outside diameter of extruding anchor 15.Transition through hole 18 can be more than steel strand wires 6 1~2mm of external diameter.The hole wall of the described through hole 17 of transition through hole 18 and second can be cambered surface and scribble lubricating grease, make extruding anchor 15 is more preferable to the direction sliding effect of the second through hole 17., two straight flanges and the first through hole and the circle phase of the second through hole of transition through hole 18 Cut through and cross, and upper following equal impulse- free robustness.
Several embodiments can do rational change and substitute above, such as can replace latch with circular groove 14 31 and hole 32, carriage 16 can be used to replace tourelle 25 etc..
The utility model armored concrete construction method of underground continuous wall step is as follows:
1st, the anchor of the bottom of steel strand wires 6 makes and assembled:The bottom of steel strand wires 6 for being cased with sleeve pipe 13 is passed through into bearing plate 10 first through hole 19, extruding is extruding anchor 15 after being inserted in steel bushing, a kind of radial direction position limiting structure more than in several structures Make extruding anchor 15 radially spacing in the bottom of first through hole 19, then low protection cover on bearing plate 10 is mounted and sealed, make simultaneously Install a kind of above-mentioned dress for enabling to disengage when compressing bearing plate 10 during 15 tensioning of extruding anchor and dismantle in the device of bearing plate 10 Put, such as make carriage and coat lubricating grease in detent surface.
2nd, nonprestressed reinforcement cage is made according to a conventional method.
The 3rd, the steel strand wires 6 assembled and anchor of requirement are arranged on to the corresponding positions of nonprestressed reinforcement cage Put, wherein steel strand wires 6 will reserve anchoring and the tensioning section of the upper surface of the diaphram wall concrete after being higher by shaping.
4th, the deep trench of shaping armored concrete diaphram wall is excavated according to a conventional method.
5th, installation will be deformed bar with steel strand wires 6 with the steel strand wires 6 assembled and the steel reinforcement cage of anchor That row be arranged on lean on excavation of foundation pit side.
6th, poured in place concrete, and conserving according to a conventional method according to a conventional method.
7th, after judging that concrete meets tensioning condition according to a conventional method, steel strand wires 6 of the tensioning as deformed bar, such as: Can be according to diaphram wall by curved situation progressively tension steel strand, i.e. control stress for prestressing of the single tension to design in batches σcon=0.75fptk, or the equal tensioning of whole steel strand wires, but in batches by control stress for prestressing σconFrom=0.45fptkGradually increase To 0.75fptk
8th, the intermediate plate anchorage of the anchorage such as prior art of use of stretching end is protected after the completion of tensioning according to a conventional method, with Standby adjustment tensioning value and put with.
9th, the continuous wall 1 in armored concrete underground completes function, i.e., after the completion of the affiliated major project built When need to dismantle, putting for steel strand wires 6 can be carried out and open and reclaim.An intermediate plate anchorage is such as put, is made at the steel strand wires 6 as deformed bar Exerted oneself downwards in unstress state, then to steel strand wires 6, and by whole steel strand wires 6 itself gravity sag and along chute or rolling Road and transition through hole 18 slide to or are rolled to the lower section of the second through hole 17, then pull up, and extruding anchor 15 is disengagable bearing plate 10 and made Pull out whole wall 1.
Preferred embodiment of the present utility model is the foregoing is only, is not limited to the utility model, for ability For the technical staff in domain, the utility model can have various modifications and variations.It is all the utility model spirit and principle within, Any modification, equivalent substitution and improvements made etc., should be included within the scope of protection of the utility model.

Claims (10)

1. a kind of armored concrete diaphram wall, including wall and at least two row longitudinal direction steel of the length direction extension along wall Muscle:A placing of reinforcement wherein at least close to no-dig technique side is nonprestressed reinforcement, it is characterised in that:Close to the row's steel for excavating side Muscle mixes cloth muscle for the deformed bar and nonprestressed reinforcement of post stretching, and the deformed bar refers to steel strand wires, wherein every Sleeve pipe is equipped with outside steel strand wires, have between steel strand wires and sleeve pipe has for the vertically movable gap of steel strand wires, sleeve pipe upper and lower ends Prevent the concrete mix of flowing from penetrating into ensure the vertically movable device of steel strand wires energy, steel strand wires bottom and top are connected with Anchor.
2. armored concrete diaphram wall according to claim 1, it is characterised in that:What the steel strand wires bottom was connected with Anchor includes a bearing plate, there is the first through hole passed through for steel strand wires on bearing plate, and the internal diameter of first through hole twists more than steel The external diameter of line, the steel strand wires bottom on the downside of first through hole are fixed with extruding anchor, and described bearing plate, which is additionally provided with, prevents the mixed of flowing Steel strand wires disengage the protective cover of bearing plate when solidifying native mixture penetrates into extruding anchor and bearing plate junction to ensure to need;It is described to hold It is additionally provided with pressing plate and protective cover and sleeve pipe when compressing bearing plate when enabling extruding anchor tensioning and dismantle and disengages bearing plate and drawn From the device of wall.
3. armored concrete diaphram wall according to claim 2, it is characterised in that:The bearing plate and protective cover and What sleeve pipe was provided with enables to disengage bearing plate when compressing bearing plate during extruding anchor tensioning and dismantle and be pulled away from the device of wall Structure is as follows:The bearing plate bottom surface has one to be radially offset from the circle of first through hole bottom at the top of extruding anchor to prevent it for housing Shape indent, bearing plate are provided with the second through hole that internal diameter is more than extruding anchor maximum gauge, had between first through hole and the second through hole Transition through hole, one has for an extruding anchor sagging after putting in the protective cover immediately below first through hole, transition through hole and the second through hole The carriage for having tip chute being snapped down to below the second through hole;The internal diameter of described sleeve pipe is more than first through hole transition through hole The size of second through hole three's line of centres length.
4. armored concrete diaphram wall according to claim 3, it is characterised in that:Described tip chute inner surface Scribble lubricating grease.
5. armored concrete diaphram wall according to claim 4, it is characterised in that:Described tip chute cross section For arc.
6. armored concrete diaphram wall according to claim 2, it is characterised in that:The bearing plate and protective cover and What sleeve pipe was provided with enables to disengage bearing plate when compressing bearing plate during extruding anchor tensioning and dismantle and be pulled away from the device of wall Structure is as follows:The bearing plate is provided with the second through hole that internal diameter is more than extruding anchor maximum gauge, first through hole and the second through hole Between have a transition through hole, the protective cover is provided with extruding anchor to the rubber band pulled with the second through hole opposite direction, first One has for the extruding anchor after the disconnected rubber band of sagging after putting an and pendant in protective cover immediately below through hole, transition through hole and the second through hole The tourelle for having inclined races being snapped down to below the second through hole;The internal diameter of described sleeve pipe is more than first through hole transition through hole The size of second through hole three's line of centres length.
7. armored concrete diaphram wall according to claim 2, it is characterised in that:The bearing plate and protective cover and What sleeve pipe was provided with enables to disengage bearing plate when compressing bearing plate during extruding anchor tensioning and dismantle and be pulled away from the device of wall Structure is as follows:Convex latch arranged at the extruding anchor bottom, and bearing plate bottom surface has that a depth is more than plug pin lengths and diameter is big In the blind hole for being used to house latch and being radially offset to prevent extruding anchor first through hole bottom of pin diameter, bearing plate is provided with internal diameter More than the second through hole of extruding anchor maximum gauge, there is transition through hole between first through hole and the second through hole, first through hole, transition are led to One has and is snapped down to having below the second through hole for an extruding anchor sagging after putting and inclines in protective cover immediately below hole and the second through hole The closed carriage of oblique chute;The internal diameter of described sleeve pipe connects more than first through hole transition through hole the second through hole three center The size of line length.
8. armored concrete diaphram wall according to claim 7, it is characterised in that:In the closed carriage Equipped with lubricating oil.
9. according to the armored concrete diaphram wall described in claim 3 or 6 or 7, it is characterised in that:Described transition through hole For cambered surface and lubricating grease is scribbled with the hole wall of the second through hole.
10. armored concrete diaphram wall according to claim 1, it is characterised in that:The nonprestressed reinforcement with Steel strand wires are arranged at intervals.
CN201720987439.7U 2017-07-28 2017-07-28 Armored concrete diaphram wall Active CN207062932U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108708368A (en) * 2018-09-13 2018-10-26 上海建工集团股份有限公司 Multistage anchoring prestress muscle continuous underground wall structure and its construction method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108708368A (en) * 2018-09-13 2018-10-26 上海建工集团股份有限公司 Multistage anchoring prestress muscle continuous underground wall structure and its construction method
CN108708368B (en) * 2018-09-13 2018-12-07 上海建工集团股份有限公司 Multistage anchoring prestress muscle continuous underground wall structure and its construction method

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