CN203821400U - Prestressing force supporting structure of foundation pit - Google Patents
Prestressing force supporting structure of foundation pit Download PDFInfo
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- CN203821400U CN203821400U CN201420266437.5U CN201420266437U CN203821400U CN 203821400 U CN203821400 U CN 203821400U CN 201420266437 U CN201420266437 U CN 201420266437U CN 203821400 U CN203821400 U CN 203821400U
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- prestressing force
- purlin
- beams
- reinforcing steel
- guan liang
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Abstract
The utility model discloses a prestressing force supporting structure of a foundation pit, which includes vertical earth-retaining components, top beams, purlin beams, a plurality of angle braces and a symmetrical brace, wherein the top beams and the purlin beams are reinforced concrete beams; the top beams are connected onto the top end faces of the vertical earth-retaining components in a pouring manner; the vertical earth-retaining components are anchored into the top beams; the purlin beams are connected onto the inner side faces of the vertical earth-retaining components in a pouring manner; the angle braces and the symmetrical brace are used as support saddles of the top beams and the purlin beams; a first sleeve is arranged on each top beam, and a first prestressed rib is arranged in each first sleeve; anchorage devices which exert prestressing force onto the first prestressed rib are arranged on the support saddles at the two ends of each top beam; a second sleeve is arranged in each purlin beam, and a second prestressed rib is arranged in each second sleeve; anchorage devices which exert prestressing force to the second prestressing force rib are arranged on the support saddles at the two ends of each purlin beam. The prestressing force supporting structure of the foundation pit has the advantage that the supporting structure has high stiffness and a large span, thereby enlarging the space for foundation pit field construction, and further, facilitating earth excavation and underground structure construction, as a result, the construction efficiency is improved, and the construction cost is reduced.
Description
Technical field
The utility model relates to field of civil engineering, more specifically relates to foundation ditch prestressing force braced structures.
Background technology
In large-scale deep-foundation pit engineering field, in order to ensure the safety of underground structure and foundation ditch surrounding enviroment, the support form of one Huo Ji road inner support need to be set within the scope of foundation depth, to resist the significant horizontal power being produced by soil pressure and ground load.Inner support need to be arranged to the huge horizontal truss of physical dimension, also to arrange column along truss position every a segment distance, in some base pit engineering, horizontal truss support and column are often crisscross, bring very large impact to ground works and follow-up construction work.
Guan Liang is the structural element that forms inner support with enclosing purlin, in order to increase the construction space of foundation ditch, and the span that often needs to increase its Guan Liang He enclose purlin.For this reason, reinforced concrete fortifield village purlin is realized by increasing section size and quantity of reinforcement, but this will increase the consumption of support material greatly, increases cost.
Utility model content
In order to address the above problem, it is a kind of simple in structure that the utility model provides, and construction costs is low, has increased the working space of foundation ditch, facilitates the foundation ditch prestressing force braced structures of soil excavation and Underground Construction.
According to an aspect of the present utility model, foundation ditch prestressing force braced structures is provided, it comprises vertical soil blocking component, Guan Liang and enclose purlin beam, Guan Liang and enclose purlin beam and be reinforced concrete beam, Guan Liang builds the top end face that is connected in vertical soil blocking component, vertical soil blocking component anchors in hat beam, enclose purlin beam and build the medial surface that is connected in vertical soil blocking component, foundation ditch prestressing force braced structures also comprise angle brace and to support, angle brace and to support as Guan Liang with enclose the bearing of purlin beam, in hat beam, be furnished with the first sleeve pipe, in the first sleeve pipe, be provided with the first presstressed reinforcing steel, the two end bearing places of Guan Liang are provided with the first presstressed reinforcing steel are applied to prestressed ground tackle, enclose and in purlin beam, be furnished with the second sleeve pipe, in the second sleeve pipe, be provided with the second presstressed reinforcing steel, the two end bearing places that enclose purlin beam are provided with the second presstressed reinforcing steel are applied to prestressed ground tackle.Thus, Guan Liang and enclose purlin beam adopt reinforced concrete beam, by arranging respectively the first presstressed reinforcing steel, the second presstressed reinforcing steel at Guan Liang with in enclosing purlin beam, concreting, after concrete reaches design strength, Guan Liang and the first presstressed reinforcing steel, the second presstressed reinforcing steel that enclose purlin beam inside are carried out stretch-draw and locked with ground tackle.Add the more traditional stressed non-deformability of reinforced concrete fortifield village purlin of reinforced concrete beam of presstressed reinforcing steel to strengthen, due to beam body is applied to prestressing force, the rigidity of beam body further increases, can Reducing distortion.With the steel concrete girder construction of presstressed reinforcing steel can reach reduce angle brace and to support, increase the construction space of foundation ditch, reduce to tear open support engineering quantity, and the cost performance of prestressed reinforced concrete structure is also far above ordinary reinforced concrete structure, so adopt braced structures described in the utility model greatly to save the consumption of support material.
In some embodiments, the first presstressed reinforcing steel and the second presstressed reinforcing steel all adopt unbonded prestressing tendon, and unbonded prestressing tendon is that single, many reinforcing bars or steel strand are made.Thus, this presstressed reinforcing steel does not directly contact with concrete, and in the state without bonding, stretch-draw friction loss is little, and operating period presstressed reinforcing steel can be mended stretch-draw.
The lower surface of in some embodiments, enclosing purlin beam is provided with column.Thus, for the purlin that encloses of some large spans, need to column be set in the lower surface of enclosing purlin beam, enclose purlin beam for supporting.Arranging of column need to complete building before enclosing purlin beam.
In some embodiments, in hat beam, be provided with the first reinforcing cage, the first reinforcing cage is made up of the first main muscle and the first stirrup being sheathed on outside the first main muscle, and the first sleeve pipe is fixed in the first reinforcing cage, and in the first reinforcing cage, drawknot has the first lacing wire.Thus, in the first reinforcing cage, drawknot has the first lacing wire, can ensure that the first reinforcing cage is not yielding.
In some embodiments, enclose in purlin beam and be provided with the second reinforcing cage, the second reinforcing cage is made up of the second main muscle and the second stirrup being sheathed on outside the second main muscle, and the second sleeve pipe is fixed in the second reinforcing cage, and in the second reinforcing cage, drawknot has the second lacing wire.Thus, in the second reinforcing cage, drawknot has the second lacing wire, can ensure that the second reinforcing cage is not yielding.
The utility model has the advantages that: foundation ditch prestressing force braced structures provided by the utility model, it is simple in structure, and construction costs reduces.The rigidity increase, the span increase that utilize the first presstressed reinforcing steel and the second presstressed reinforcing steel to make Guan Liang and enclose purlin beam, reduced the quantity to support and angle brace, increased the working space of foundation ditch, facilitates soil excavation and Underground Construction, improved efficiency of construction.
Brief description of the drawings
Fig. 1 is the structural representation of an embodiment of the utility model foundation ditch prestressing force braced structures;
Fig. 2 is the structural representation of an embodiment of the Guan Liang shown in Fig. 1;
Fig. 3 is the structural representation of the embodiment that encloses purlin beam shown in Fig. 1;
Fig. 4 is the structural representation of A-A in Fig. 2;
Fig. 5 is the structural representation of B-B in Fig. 3.
Detailed description of the invention
Below in conjunction with detailed description of the invention, the utility model is further described.
As shown in Figures 1 to 3, the foundation ditch prestressing force braced structures of an embodiment described in the utility model, it comprises vertical soil blocking component 1, hat beam 2 and encloses purlin beam 3.General retaining piles or the diaphragm wall of adopting of vertical soil blocking component 1.Be preced with beam 2 and enclose purlin beam 3 and be reinforced concrete beam.Hat beam 2 is built the top end face that is connected in vertical soil blocking component 1, and vertical soil blocking component 1 anchors in hat beam 2 (as shown in Figure 4), and hat beam 2 is built integral with vertical soil blocking component 1.Enclose purlin beam 3 and build the medial surface that is connected in vertical soil blocking component 1.Foundation ditch prestressing force braced structures also comprises angle brace 5 and to supportting 6, angle brace 5 and to supportting 6 as hat beam 2 and enclosing the bearing of purlin beam 3.As shown in Figure 4, in hat beam 2, be furnished with the first sleeve pipe 201, in the first sleeve pipe 201, be installed with the elongated layout of the first presstressed reinforcing steel 202, the first presstressed reinforcing steel 202, two end bearing places of hat beam 2 are provided with the first presstressed reinforcing steel 202 are applied to prestressed ground tackle (scheming not shown).As shown in Figure 5, enclose in purlin beam 3 and be furnished with in the second sleeve pipe 301, the second sleeve pipes 301 and be installed with the elongated layout of the second presstressed reinforcing steel 302, the second presstressed reinforcing steel 302, the two end bearing places that enclose purlin beam 3 are provided with the second presstressed reinforcing steel 302 are applied to prestressed ground tackle.So-called elongated layout, refer to the first presstressed reinforcing steel 202 and the second presstressed reinforcing steel 302 respectively through hat beam 2 and the inside of enclosing purlin beam 3, the two ends that the two ends of the first presstressed reinforcing steel 202 and the second presstressed reinforcing steel 302 are fixed on hat beam 2 and are enclosed purlin beam 3 by ground tackle respectively.Be preced with beam 2 and enclose purlin beam 3 and adopt reinforced concrete beam, by arranging respectively the first presstressed reinforcing steel 202, the second presstressed reinforcing steel 302 at hat beam 2 with in enclosing purlin beam 3, concreting, after concrete reaches design strength, hat beam 2 and the first presstressed reinforcing steel 202, the second presstressed reinforcing steel 302 that enclose purlin beam 3 inside are carried out stretch-draw and locked with ground tackle.Add the more traditional stressed non-deformability of reinforced concrete fortifield village purlin of reinforced concrete beam of presstressed reinforcing steel to strengthen, due to beam body is applied to prestressing force, the rigidity of beam body further increases, can Reducing distortion.Can reach and reduce angle brace 5 and to supportting 6 with the steel concrete girder construction of presstressed reinforcing steel, increase the construction space of foundation ditch, reduce to tear open support engineering quantity, and the cost performance of prestressed reinforced concrete structure is also far above ordinary reinforced concrete structure, so adopt braced structures provided by the utility model greatly to save the consumption of support material.
As shown in Figures 4 and 5, the first presstressed reinforcing steel 202 and the second presstressed reinforcing steel 302 all adopt unbonded prestressing tendon, and unbonded prestressing tendon is that single, many reinforcing bars or steel strand are made.In the present embodiment, adopt many steel strand as presstressed reinforcing steel, this presstressed reinforcing steel does not directly contact with concrete, in the state without bonding.The rotten oil layer of setting up defences between presstressed reinforcing steel and sleeve pipe, stretch-draw friction loss is little, and operating period presstressed reinforcing steel can be mended stretch-draw.In actual application, can, according to force and deformation control requirement, select to determine radical and the kind of presstressed reinforcing steel.Low for some force requests, can adopt single steel bar as presstressed reinforcing steel, just can meet the demands.
The lower surface of as shown in figs. 1 and 3, enclosing purlin beam 3 is connected with column 7.For the purlin that encloses of some large spans, need to column 7 be set in the lower surface of enclosing purlin beam 3, enclose purlin beam 3 for supporting.Arranging of column 7 need to complete building before enclosing purlin beam 3, the top of column 7 with enclose purlin beam 3 formed by integrally casting.
As shown in Figure 4, in hat beam 1, be provided with the first reinforcing cage 203, the first reinforcing cage 203 is made up of with the first stirrup 205 being sheathed on outside the first main muscle 204 the first main muscle 204, and the first sleeve pipe 201 is fixed in the first reinforcing cage 203 by iron wire, and the interior drawknot of the first reinforcing cage 203 has the first lacing wire 206.The interior drawknot of the first reinforcing cage 203 has the first lacing wire 206, can ensure that the first reinforcing cage 203 is not yielding.So-called drawknot, the one end that refers to the first lacing wire 206 is connected with a side of the first reinforcing cage 203, and the other end of the first lacing wire 206 is connected with the opposite side of the first reinforcing cage 203.Building hat when beam 2, vertical soil blocking component 1 need to be anchored in hat beam 2, reach after design strength wait the concrete of being preced with beam 2, the first presstressed reinforcing steel 202 is carried out stretch-draw and locked with ground tackle.
As shown in Figure 5, enclose and in purlin beam 3, be provided with the second reinforcing cage 303, the second reinforcing cage 303 is made up of with the second stirrup 305 being sheathed on the second main muscle 304 the second main muscle 304, and the second sleeve pipe 301 is fixed in the second reinforcing cage 303 by iron wire, and the interior drawknot of the second reinforcing cage 303 has the second lacing wire 306.So-called drawknot, the one end that refers to the second lacing wire 306 is connected with a side of the second reinforcing cage 303, and the other end of the second lacing wire 306 is connected with the opposite side of the second reinforcing cage 303.The interior drawknot of the second reinforcing cage 303 has the second lacing wire 306, can ensure that the second reinforcing cage 303 is not yielding.Building while enclosing purlin beam 3, reach after design strength wait the concrete that encloses purlin beam 3, the second presstressed reinforcing steel 302 is carried out stretch-draw and locked with ground tackle.
Above-described is only embodiments more of the present utility model; it should be pointed out that for the person of ordinary skill of the art, do not departing under the prerequisite of creation design of the present utility model; can also make other distortion and improvement, these all belong to protection domain of the present utility model.
Claims (5)
1. foundation ditch prestressing force braced structures, it is characterized in that, comprise vertical soil blocking component (1), Guan Liang (2) and enclose purlin beam (3), described Guan Liang (2) and enclose purlin beam (3) and be reinforced concrete beam, described Guan Liang (2) builds the top end face that is connected in vertical soil blocking component (1), described vertical soil blocking component (1) anchors in Guan Liang (2), the described purlin beam (3) that encloses is built the medial surface that is connected in vertical soil blocking component (1), described foundation ditch prestressing force braced structures also comprise angle brace (5) and to support (6), described angle brace (5) and to support (6) as Guan Liang (2) with enclose the bearing of purlin beam (3), in described Guan Liang (2), be furnished with the first sleeve pipe (201), in described the first sleeve pipe (201), be provided with the first presstressed reinforcing steel (202), the two end bearing places of described Guan Liang (2) are provided with the first presstressed reinforcing steel (202) are applied to prestressed ground tackle, described enclosing is furnished with the second sleeve pipe (301) in purlin beam (3), in described the second sleeve pipe (301), be provided with the second presstressed reinforcing steel (302), the described two end bearing places that enclose purlin beam (3) are provided with the second presstressed reinforcing steel (302) are applied to prestressed ground tackle.
2. foundation ditch prestressing force braced structures according to claim 1, it is characterized in that, described the first presstressed reinforcing steel (202) and the second presstressed reinforcing steel (302) all adopt unbonded prestressing tendon, and described unbonded prestressing tendon is that single, many reinforcing bars or steel strand are made.
3. foundation ditch prestressing force braced structures according to claim 2, is characterized in that, described in enclose purlin beam (3) lower surface be provided with column (7).
4. foundation ditch prestressing force braced structures according to claim 1, it is characterized in that, in described Guan Liang (2), be provided with the first reinforcing cage (203), described the first reinforcing cage (203) is by the first main muscle (204) and be sheathed on outer the first stirrup (205) formation of the first main muscle (204), described the first sleeve pipe (201) is fixed in the first reinforcing cage (203), and the interior drawknot of described the first reinforcing cage (203) has the first lacing wire (206).
5. foundation ditch prestressing force braced structures according to claim 4, it is characterized in that, described enclosing is provided with the second reinforcing cage (303) in purlin beam (3), described the second reinforcing cage (303) is by the second main muscle (304) and be sheathed on outer the second stirrup (305) formation of the second main muscle (304), described the second sleeve pipe (301) is fixed in the second reinforcing cage (303), and the interior drawknot of described the second reinforcing cage (303) has the second lacing wire (306).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420266437.5U CN203821400U (en) | 2014-05-22 | 2014-05-22 | Prestressing force supporting structure of foundation pit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420266437.5U CN203821400U (en) | 2014-05-22 | 2014-05-22 | Prestressing force supporting structure of foundation pit |
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| CN203821400U true CN203821400U (en) | 2014-09-10 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104452775A (en) * | 2014-11-26 | 2015-03-25 | 江苏鸿基科技有限公司 | Prestress support used for foundation pit and construction method |
| CN104863160A (en) * | 2015-04-09 | 2015-08-26 | 成都绿迪科技有限公司 | Foundation pit supporting structure |
| CN105220697A (en) * | 2015-11-06 | 2016-01-06 | 无锡市大筑岩土技术有限公司 | Shaped steel and prestressed reinforced concrete combining structure support and construction method |
| CN112982432A (en) * | 2021-02-10 | 2021-06-18 | 建研地基基础工程有限责任公司 | Prestressed concrete foundation pit supporting structure and construction method |
| CN113846645A (en) * | 2021-08-25 | 2021-12-28 | 东通岩土科技股份有限公司 | Foundation pit supporting structure utilizing steel side arch structure |
| CN113846644A (en) * | 2021-08-25 | 2021-12-28 | 东通岩土科技股份有限公司 | Foundation pit steel supporting structure utilizing haunch structure |
-
2014
- 2014-05-22 CN CN201420266437.5U patent/CN203821400U/en active Active
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104452775A (en) * | 2014-11-26 | 2015-03-25 | 江苏鸿基科技有限公司 | Prestress support used for foundation pit and construction method |
| CN104452775B (en) * | 2014-11-26 | 2016-08-24 | 江苏鸿基科技有限公司 | Pre-loaded support struts and construction method for foundation ditch |
| CN104863160A (en) * | 2015-04-09 | 2015-08-26 | 成都绿迪科技有限公司 | Foundation pit supporting structure |
| CN105220697A (en) * | 2015-11-06 | 2016-01-06 | 无锡市大筑岩土技术有限公司 | Shaped steel and prestressed reinforced concrete combining structure support and construction method |
| CN112982432A (en) * | 2021-02-10 | 2021-06-18 | 建研地基基础工程有限责任公司 | Prestressed concrete foundation pit supporting structure and construction method |
| CN113846645A (en) * | 2021-08-25 | 2021-12-28 | 东通岩土科技股份有限公司 | Foundation pit supporting structure utilizing steel side arch structure |
| CN113846644A (en) * | 2021-08-25 | 2021-12-28 | 东通岩土科技股份有限公司 | Foundation pit steel supporting structure utilizing haunch structure |
| CN113846645B (en) * | 2021-08-25 | 2022-12-16 | 东通岩土科技股份有限公司 | Foundation pit supporting structure utilizing steel side arch structure |
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