CN203846514U - Supporting structure for short edge of long-strip rectangular foundation pit - Google Patents
Supporting structure for short edge of long-strip rectangular foundation pit Download PDFInfo
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- CN203846514U CN203846514U CN201420286465.3U CN201420286465U CN203846514U CN 203846514 U CN203846514 U CN 203846514U CN 201420286465 U CN201420286465 U CN 201420286465U CN 203846514 U CN203846514 U CN 203846514U
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Abstract
The utility model discloses a supporting structure for the short edge of a long-strip rectangular foundation pit. An angle brace is arranged on the top point of the foundation pit, a set of fish-belly sill devices are arranged on the short edge of the foundation pit, the angle brace produces prestress by adjusting a jack, the fish-belly sill devices produce prestress by adjusting the degree of tightness of a steel strand, three plies of angle brace bodies in the angle brace and the fish-belly sill devices share a second angle brace base, and the connecting structure is stable and reliable. The supporting structure is small in whole occupied space, facilitates excavation of the foundation pit and improves efficiency, meanwhile, the components of the supporting structure are mostly sectional materials of standard sizes, are connected through bolts and are quite convenient to assemble and disassemble, the repeating utilization factor is high, and the foundation pit supporting cost is reduced on the whole.
Description
Technical field
The utility model belongs to field of civil engineering, is specifically related to the prestressing force supporting and protection structure of foundation ditch.
Background technology
The mode that existing pattern foundation pit supporting structure mode mostly adopts is that the surrounding at foundation ditch arranges reinforced concrete fortifield village purlin, in enclosing purlin, week is arranged netted steel pipe support again, when it is not enough, steel pipe consumption is large, install, remove trouble, and it is large to take up space, and is unfavorable for soil excavation in foundation ditch, can not to foundation pit side-wall, apply prestressing force well, support strength is low, conventionally can only increase support force by increasing the density of steel pipe layout; And during different pattern foundation pit supporting structure, need use the steel pipe of different size, steel pipe repeat usage is low, causes the costly of pattern foundation pit supporting structure.
Summary of the invention
Technical problem to be solved in the utility model is: the deficiency existing for prior art, and a kind of installation is provided, removes conveniently, occupy foundation ditch space little, the supporting and protection structure of the foundation ditch minor face that supporting intensity is high and the supporting section bar rate of recovery is high.
For realizing the object of the utility model, be achieved by the following technical solutions: a kind of supporting and protection structure for elongated rectangular shape foundation ditch minor face, on the minor face of foundation ditch, be provided with a fish belly sill device, fish belly sill device includes 2 the second angle brace seats, 3 web member supports between two the second angle brace seats, and be fixed between two the second angle brace seats and to each web member support and apply prestressed steel strand.
Described web member support includes lower-cord beam, with lower-cord beam web member connected vertically, be connected the oblique fulcrum bar of web member and lower-cord beam, also comprise the extension rod with the coaxial adjustment web member length being connected of web member, and the steel strand positioning head that is connected to extension rod end; Each lower-cord beam end connects successively, and the lower-cord beam that is positioned at outermost end is connected with the second angle brace seat end; Described extension rod can be adjusted the effective length of web member as required, thereby makes steel strand have the radian needing, and the corner dimension between steel strand and web member is suitable.
The below of described each web member is also supported with angle-table bracket, angle-table bracket and the fixing welding of H shaped steel being inserted in cement mixing pile; Described steel strand coordinate pulling force that web member support produces on horizontal plane, and angle-table bracket can not produce web member support to teetertotter or be loosening.
The second described angle brace seat is welded and forms successively by three sections of H shaped steel, and the web of three sections of H shaped steel is in the same plane, and three sections of H shaped steel surround an isosceles right triangle; The H shaped steel i that is positioned at hypotenuse is welded with a H shaped steel h in 1/3 position on the edge of a wing outwardly, and the both ends of H shaped steel h and H shaped steel i are all welded with junction plate; H shaped steel i is positioned at H shaped steel h mono-side and on the edge of a wing, offers the connecting hole that 2 group of two row four is listed as outwardly, and the distance of horizontal two adjacent connecting holes is a, and the distance of longitudinal two adjacent connecting holes is 2a; H shaped steel i is positioned at H shaped steel h opposite side and on the edge of a wing, offers one group of two row, 11 row and one group of two connecting hole that row six is listed as outwardly; Between web inside H shaped steel i and the edge of a wing, be welded with a plurality of reinforcing gussets, reinforce the position that gusset is positioned at H shaped steel h two ends, and the position between two adjacent groups connecting hole; The H shaped steel j end that is positioned at right-angle side is welded with junction plate, and the H shaped steel j edge of a wing outwardly offers the connecting hole of six group of two row's two row; The end of H shaped steel k and the edge of a wing vertical welding of H shaped steel j next-door neighbour end that are positioned at another right-angle side, the other end of the k of H shaped steel and H shaped steel i are away from one end welding of H shaped steel h; The H shaped steel k edge of a wing outwardly offers the connecting hole of three group of two row's two row; H shaped steel k is welded with a guide plate passing for steel strand near the end position of H shaped steel i, and H shaped steel i is welded with a steel strand fixed head near one end of H shaped steel k; Between H shaped steel i, H shaped steel j and H shaped steel k, be welded with a junction steel plate, the position that junction steel plate is positioned at the second angle brace seat middle part is provided with two steel strand anchorages; Described steel strand anchorage applies pulling force to steel strand, makes each web member support produce prestressing force to the cement mixing pile metope of foundation pit side-wall, guarantees that body of wall does not firmly tilt or collapses.Described steel strand end is divided into two strands through after guide plate, and one is strained by ground tackle, and another strand is fixed on steel strand fixed head after ground tackle tension.
Described steel strand are successively on the steel strand positioning head of each web member bracket end, and the two ends of steel strand are passed the guide plate on the second angle brace seat and are fixed on steel strand fixed head and steel strand anchorage.
Three strands of described angle braces include between the second angle brace seat of the formation fish belly sill device described in two and 3 web member supports and form symmetrical four parts, from middle, toward both sides, be followed successively by symmetrical line d and line e, between line d and extension rod, form the angle of 78 degree, between line e and extension rod, form the angle of 58 degree; Because the length of foundation ditch minor face is less, therefore 3 web member supports steel strand are only set, be set to larger angle to reduce the quantity of member, and guarantee the intensity that supports.
Two the second angle brace seats and 3 web member support supported underneath have and the crossbeam that encloses purlin shaped steel and be arranged in parallel, and described crossbeam is connected on cement mixing pile.
In foundation ditch minor face both sides, each place, summit is provided with 3 groups of angle braces, includes 2 groups of sub-thread angle braces and 1 group of three strands of angle brace;
Described sub-thread angle brace includes two the first angle brace seats and a strut, the first angle brace seat is bolted and is enclosing on purlin shaped steel, strut and foundation ditch summit two gusset purlin shaped steel form an isosceles right triangle, one end of strut and a first angle brace seat are bolted, and between the other end of strut and another the first angle brace seat, are connected and are connected with a jack.
Between the strut of two sub-thread angle braces, be connected with two channel-section steels, two channel-section steels are mutually vertical, and between channel-section steel and strut shape is in angle of 45 degrees.
The first described angle brace seat surrounds an isosceles right triangle by three block plate head and the tail successively welding, three block plate intermediate vertical are welded with a stiffener, be positioned on the steel plate of hypotenuse and offer six connecting holes, six connecting holes along hypotenuse length direction with two row's three column distributions, laterally the distance of adjacent two connecting holes is a, and longitudinally the distance of adjacent two connecting holes is 2a; Be positioned on the steel plate of a right-angle side and start to have four connecting holes; Four connecting holes are with two row's two column distributions, and distances horizontal, longitudinally adjacent two connecting holes are 2a; And the position deflection that is positioned at six connecting holes on the steel plate of hypotenuse is not offered steel plate one side of connecting hole; As shown in Figure 9, the first angle brace is sat and is connected with strut and is produced after prestressing force by jack, pressure mainly concentrates on steel plate on the right-angle side that has connecting hole and the right side part of hypotenuse upper steel plate, therefore it is the most reasonable that the connecting hole of the steel plate on hypotenuse is arranged on the position of keeping right, do not need too much connecting hole on the one hand, guaranteed again on the other hand bonding strength.
Three strands of described angle braces include two the second angle brace seats and three struts; The second described angle brace seat is bolted two adjacent enclosing between purlin shaped steel, and the second angle brace seat is connected with capping beam by rebar connector; Each second angle brace seat supported underneath has crossbeam, and described crossbeam is connected between two cement mixing piles, and crossbeam and enclose purlin shaped steel and be arranged in parallel; Described crossbeam is with to enclose purlin shaped steel parallel, and the obstruction to excavator while having reduced like this excavation of foundation pit, is beneficial to and raises the efficiency.
Between three described struts, be evenly connected with 4 and connect cover plate, connect cover plate mutually vertical with strut; Between three described struts, be also connected with 3 channel-section steels, each channel-section steel is between two adjacent connection cover plates.
The described purlin shaped steel that encloses is connected with the capping beam of foundation ditch periphery by rebar connector with the second angle brace seat.
Described rebar connector includes L shaped reinforcing bar, the minor face of L shaped reinforcing bar and the reinforcing bar in capping beam are welded and fixed, end, the long limit coaxial welding of L shaped reinforcing bar has the female reinforcing bar connector that can attachment screw of tool, thereby is connected with reinforcing bar connector and will encloses purlin shaped steel and capping beam is fixed through the screw that encloses purlin shaped steel; The minor face of L shaped reinforcing bar and the reinforcing bar in capping beam weld and are cemented in the concrete of capping beam, and bonding strength is high to be not easy.
Compared with prior art, the beneficial effects of the utility model are: by angle brace being set in foundation ditch apex portion, in foundation ditch short side part, one group of fish belly sill device is set, described angle brace produces prestressing force by adjusting jack, described fish belly sill device produces prestressing force by adjusting the elasticity of steel strand, and three strands of angle braces in angle brace and the public second angle brace seat of fish belly sill device, syndeton is reliable and stable.The space that this kind of supporting and protection structure takies is on the whole little, is convenient to the excavation of foundation ditch, raises the efficiency, meanwhile, the member of supporting and protection structure is mostly standard-sized section bar, by bolt part, connects, install, remove all very convenient, repeatedly recycling rate of waterused is high, has reduced on the whole the cost of pattern foundation pit supporting structure.
Accompanying drawing explanation
Fig. 1 is the overall structure schematic diagram of foundation pit support system.
Fig. 2 is arranged on the structural representation of the fish belly sill device of foundation ditch minor face.
Fig. 3 is the structural representation of the second angle brace seat.
Fig. 4 is the structural representation of web member support.
Fig. 5 is the mounting structure schematic diagram of web member support.
Fig. 6 is the angle brace structural representation of foundation ditch minor face one side vertex position.
Fig. 7 is the syndeton schematic diagram that encloses purlin shaped steel and capping beam.
Fig. 8 is the structural representation of rebar connector.
The specific embodiment
With reference to the accompanying drawings the specific embodiment of the present utility model is made a detailed explanation below.
According to shown in Fig. 1 to Fig. 8, a kind of supporting and protection structure for elongated rectangular shape foundation ditch minor face described in the present embodiment, on the minor face of foundation ditch, be provided with a fish belly sill device, fish belly sill device includes 2 the second angle brace seats 22,3 web member supports 17 between two the second angle brace seats, and be fixed between two the second angle brace seats and to each web member support and apply prestressed steel strand.
Described web member support 17 includes lower-cord beam 171, with lower-cord beam web member 173 connected vertically, be connected the oblique fulcrum bar 172 of web member and lower-cord beam, also comprise the extension rod 174 with the coaxial adjustment web member length being connected of web member, and the steel strand positioning head 175 that is connected to extension rod end; Each lower-cord beam end connects successively, and the lower-cord beam that is positioned at outermost end is connected with the second angle brace seat end.
The below of described each web member is also supported with angle-table bracket 170, angle-table bracket and the fixing welding of H shaped steel being inserted in cement mixing pile 40.
The second described angle brace seat is welded and forms successively by three sections of H shaped steel, and the web of three sections of H shaped steel is in the same plane, and three sections of H shaped steel surround an isosceles right triangle; The H shaped steel i221 that is positioned at hypotenuse is welded with a H shaped steel h222 in 1/3 position on the edge of a wing outwardly, and the both ends of H shaped steel h and H shaped steel i are all welded with junction plate; H shaped steel i is positioned at H shaped steel h mono-side and on the edge of a wing, offers the connecting hole that 2 group of two row four is listed as outwardly, and the distance of horizontal two adjacent connecting holes is a, and the distance of longitudinal two adjacent connecting holes is 2a; H shaped steel i is positioned at H shaped steel h opposite side and on the edge of a wing, offers one group of two row, 11 row and one group of two connecting hole that row six is listed as outwardly; Between web inside H shaped steel i and the edge of a wing, be welded with a plurality of reinforcing gussets, reinforce the position that gusset is positioned at H shaped steel h two ends, and the position between two adjacent groups connecting hole; The H shaped steel j223 end that is positioned at right-angle side is welded with junction plate, and the H shaped steel j edge of a wing outwardly offers the connecting hole of six group of two row's two row; The end of H shaped steel k224 and the edge of a wing vertical welding of H shaped steel j next-door neighbour end that are positioned at another right-angle side, the other end of the k of H shaped steel and H shaped steel i are away from one end welding of H shaped steel h; The H shaped steel k edge of a wing outwardly offers the connecting hole of three group of two row's two row; H shaped steel k is welded with a guide plate 225 passing for steel strand near the end position of H shaped steel i, and H shaped steel i is welded with a steel strand fixed head 226 near one end of H shaped steel k; Between H shaped steel i, H shaped steel j and H shaped steel k, be welded with a junction steel plate 227, the position that junction steel plate is positioned at the second angle brace seat middle part is provided with two steel strand anchorages 228.
Described steel strand are successively on the steel strand positioning head of each web member bracket end, and the two ends of steel strand are passed the guide plate on the second angle brace seat and are fixed on steel strand fixed head and steel strand anchorage.
Described steel strand form symmetrical four parts between two the second angle brace seats and 3 web member supports, from middle, toward both sides, be followed successively by symmetrical line d504 and line e505, between line d and extension rod, form the angle of 78 degree, between line e and extension rod, form the angle of 58 degree.
Two the second angle brace seats and 3 web member support supported underneath have and the crossbeam that encloses purlin shaped steel and be arranged in parallel, and described crossbeam is connected on cement mixing pile.
In foundation ditch minor face both sides, each place, summit is provided with 3 groups of angle braces, includes 2 groups of sub-thread angle braces and 1 group of three strands of angle brace;
Described sub-thread angle brace includes two the first angle brace seats 21 and a strut 11, the first angle brace seat is bolted and is enclosing on purlin shaped steel, strut and foundation ditch summit two gusset purlin shaped steel 10 form an isosceles right triangle, one end of strut and a first angle brace seat are bolted, and between the other end of strut and another the first angle brace seat, are connected and are connected with a jack 30.
Between the strut of two sub-thread angle braces, be connected with 14, two channel-section steels of two channel-section steels mutually vertical, and between channel-section steel and strut 11 shape is in angle of 45 degrees.
The first described angle brace seat surrounds an isosceles right triangle by three block plate head and the tail successively welding, three block plate intermediate vertical are welded with a stiffener, be positioned on the steel plate of hypotenuse and offer six connecting holes, six connecting holes along hypotenuse length direction with two row's three column distributions, laterally the distance of adjacent two connecting holes is a, and longitudinally the distance of adjacent two connecting holes is 2a; Be positioned on the steel plate of a right-angle side and start to have four connecting holes; Four connecting holes are with two row's two column distributions, and distances horizontal, longitudinally adjacent two connecting holes are 2a; And the position deflection that is positioned at six connecting holes on the steel plate of hypotenuse is not offered steel plate one side of connecting hole.
Three strands of described angle braces include the second angle brace seat 22 and three struts 11 of the formation fish belly sill device described in two; The second described angle brace seat is bolted two adjacent enclosing between purlin shaped steel, and the second angle brace seat is connected with capping beam by rebar connector; Each second angle brace seat supported underneath has crossbeam 13, and described crossbeam is connected between two cement mixing piles 40, and crossbeam and enclose purlin shaped steel and be arranged in parallel.
Between three described struts, be evenly connected with 4 and connect cover plate, connect cover plate mutually vertical with strut; Between three described struts, be also connected with 3 channel-section steels, each channel-section steel is between two adjacent connection cover plates.
The described purlin shaped steel that encloses is connected with the capping beam of foundation ditch periphery by rebar connector with the second angle brace seat.
Described rebar connector includes L shaped reinforcing bar 701, the minor face of L shaped reinforcing bar and the reinforcing bar in capping beam are welded and fixed, end, the long limit coaxial welding of L shaped reinforcing bar has the female reinforcing bar connector 702 that can attachment screw of tool, thereby is connected with reinforcing bar connector and will encloses purlin shaped steel and capping beam is fixed through the screw 703 that encloses purlin shaped steel.
Claims (1)
1. the supporting and protection structure for elongated rectangular shape foundation ditch minor face, it is characterized in that: on the minor face of foundation ditch, be provided with a fish belly sill device, fish belly sill device includes 2 the second angle brace seats, 3 web member supports between two the second angle brace seats, and be fixed between two the second angle brace seats and to each web member support and apply prestressed steel strand;
Described web member support includes lower-cord beam, with lower-cord beam web member connected vertically, be connected the oblique fulcrum bar of web member and lower-cord beam, also comprise the extension rod with the coaxial adjustment web member length being connected of web member, and the steel strand positioning head that is connected to extension rod end; Each lower-cord beam end connects successively, and the lower-cord beam that is positioned at outermost end is connected with the second angle brace seat end;
The below of described each web member is also supported with angle-table bracket, angle-table bracket and the fixing welding of H shaped steel being inserted in cement mixing pile;
The second described angle brace seat is welded and forms successively by three sections of H shaped steel, and the web of three sections of H shaped steel is in the same plane, and three sections of H shaped steel surround an isosceles right triangle; The H shaped steel i that is positioned at hypotenuse is welded with a H shaped steel h in 1/3 position on the edge of a wing outwardly, and the both ends of H shaped steel h and H shaped steel i are all welded with junction plate; H shaped steel i is positioned at H shaped steel h mono-side and on the edge of a wing, offers the connecting hole that 2 group of two row four is listed as outwardly, and the distance of horizontal two adjacent connecting holes is a, and the distance of longitudinal two adjacent connecting holes is 2a; H shaped steel i is positioned at H shaped steel h opposite side and on the edge of a wing, offers one group of two row, 11 row and one group of two connecting hole that row six is listed as outwardly; Between web inside H shaped steel i and the edge of a wing, be welded with a plurality of reinforcing gussets, reinforce the position that gusset is positioned at H shaped steel h two ends, and the position between two adjacent groups connecting hole; The H shaped steel j end that is positioned at right-angle side is welded with junction plate, and the H shaped steel j edge of a wing outwardly offers the connecting hole of six group of two row's two row; The end of H shaped steel k and the edge of a wing vertical welding of H shaped steel j next-door neighbour end that are positioned at another right-angle side, the other end of the k of H shaped steel and H shaped steel i are away from one end welding of H shaped steel h; The H shaped steel k edge of a wing outwardly offers the connecting hole of three group of two row's two row; H shaped steel k is welded with a guide plate passing for steel strand near the end position of H shaped steel i, and H shaped steel i is welded with a steel strand fixed head near one end of H shaped steel k; Between H shaped steel i, H shaped steel j and H shaped steel k, be welded with a junction steel plate, the position that junction steel plate is positioned at the second angle brace seat middle part is provided with two steel strand anchorages;
Described steel strand are successively on the steel strand positioning head of each web member bracket end, and the two ends of steel strand are passed the guide plate on the second angle brace seat and are fixed on steel strand fixed head and steel strand anchorage;
Described steel strand form symmetrical four parts between two the second angle brace seats and 3 web member supports, from middle, toward both sides, be followed successively by symmetrical line d and line e, between line d and extension rod, form the angle of 78 degree, between line e and extension rod, form the angle of 58 degree;
Two the second angle brace seats and 3 web member support supported underneath have and the crossbeam that encloses purlin shaped steel and be arranged in parallel, and described crossbeam is connected on cement mixing pile;
In foundation ditch minor face both sides, each place, summit is provided with 3 groups of angle braces, includes 2 groups of sub-thread angle braces and 1 group of three strands of angle brace;
Described sub-thread angle brace includes two the first angle brace seats and a strut, the first angle brace seat is bolted and is enclosing on purlin shaped steel, strut and foundation ditch summit two gusset purlin shaped steel form an isosceles right triangle, one end of strut and a first angle brace seat are bolted, and between the other end of strut and another the first angle brace seat, are connected and are connected with a jack;
Between the strut of two sub-thread angle braces, be connected with two channel-section steels, two channel-section steels are mutually vertical, and between channel-section steel and strut shape is in angle of 45 degrees;
The first described angle brace seat surrounds an isosceles right triangle by three block plate head and the tail successively welding, three block plate intermediate vertical are welded with a stiffener, be positioned on the steel plate of hypotenuse and offer six connecting holes, six connecting holes along hypotenuse length direction with two row's three column distributions, laterally the distance of adjacent two connecting holes is a, and longitudinally the distance of adjacent two connecting holes is 2a; Be positioned on the steel plate of a right-angle side and start to have four connecting holes; Four connecting holes are with two row's two column distributions, and distances horizontal, longitudinally adjacent two connecting holes are 2a; And the position deflection that is positioned at six connecting holes on the steel plate of hypotenuse is not offered steel plate one side of connecting hole;
Three strands of described angle braces include the second angle brace seat and three struts of the formation fish belly sill device described in two; The second described angle brace seat is bolted two adjacent enclosing between purlin shaped steel, and the second angle brace seat is connected with capping beam by rebar connector; Each second angle brace seat supported underneath has crossbeam, and described crossbeam is connected between two cement mixing piles, and crossbeam and enclose purlin shaped steel and be arranged in parallel;
Between three described struts, be evenly connected with 4 and connect cover plate, connect cover plate mutually vertical with strut; Between three described struts, be also connected with 3 channel-section steels, each channel-section steel is between two adjacent connection cover plates;
The described purlin shaped steel that encloses is connected with the capping beam of foundation ditch periphery by rebar connector with the second angle brace seat;
Described rebar connector includes L shaped reinforcing bar, the minor face of L shaped reinforcing bar and the reinforcing bar in capping beam are welded and fixed, end, the long limit coaxial welding of L shaped reinforcing bar has the female reinforcing bar connector that can attachment screw of tool, thereby is connected with reinforcing bar connector and will encloses purlin shaped steel and capping beam is fixed through the screw that encloses purlin shaped steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420286465.3U CN203846514U (en) | 2014-05-28 | 2014-05-28 | Supporting structure for short edge of long-strip rectangular foundation pit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420286465.3U CN203846514U (en) | 2014-05-28 | 2014-05-28 | Supporting structure for short edge of long-strip rectangular foundation pit |
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| CN203846514U true CN203846514U (en) | 2014-09-24 |
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| CN201420286465.3U Expired - Fee Related CN203846514U (en) | 2014-05-28 | 2014-05-28 | Supporting structure for short edge of long-strip rectangular foundation pit |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032750A (en) * | 2014-05-28 | 2014-09-10 | 德清鑫德机械有限公司 | Supporting structure for short edge of long rectangular foundation pit |
| CN105908754A (en) * | 2016-05-20 | 2016-08-31 | 东通岩土科技（杭州）有限公司 | Crescent beam supporting system of building foundation pit |
| CN108560562A (en) * | 2018-05-24 | 2018-09-21 | 东南大学 | A kind of stay length adjustable deep foundation pit support prestressing force fish belly sill |
-
2014
- 2014-05-28 CN CN201420286465.3U patent/CN203846514U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104032750A (en) * | 2014-05-28 | 2014-09-10 | 德清鑫德机械有限公司 | Supporting structure for short edge of long rectangular foundation pit |
| CN105908754A (en) * | 2016-05-20 | 2016-08-31 | 东通岩土科技（杭州）有限公司 | Crescent beam supporting system of building foundation pit |
| CN108560562A (en) * | 2018-05-24 | 2018-09-21 | 东南大学 | A kind of stay length adjustable deep foundation pit support prestressing force fish belly sill |
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