CN104631469A - Astylar reinforced concrete supporting framework for deep and big foundation pit and building method thereof - Google Patents
Astylar reinforced concrete supporting framework for deep and big foundation pit and building method thereof Download PDFInfo
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Abstract
The invention discloses an astylar reinforced concrete supporting framework for a deep and big foundation pit. The astylar reinforced concrete supporting framework comprises two containment mechanisms, two reinforcing mechanisms, a plurality of arch-shaped arched beams arranged side by side and a horizontal supporting mechanism, wherein each containment mechanism comprises a plurality of row piles, and the row piles are vertically drilled into the soil outside the two side walls of the foundation pit side by side; each reinforcing mechanism comprises a plurality of stand column piles, and the stand column piles are vertically drilled into the soil outside the two side walls of the foundation pit side by side and located on the sides, close to the two side walls of the foundation pit, of the containment mechanisms; the two ends of the arched beams are fixed to the reinforcing mechanisms respectively, the two side portions of the arched beams are located under the ground, and the middle portions of the arched beams are located on the ground; the horizontal supporting mechanism comprises a plurality of horizontal supporting beams which are transversely arranged side by side, and the two ends of the horizontal supporting beams are fixed to the tops of the containment mechanisms outside the two side walls of the foundation pit respectively. The invention further discloses a building method. The astylar reinforced concrete supporting framework for the deep and big foundation pit and the building method have the advantages that the soil excavation efficiency of the foundation pit is improved, cellar structure construction is planned more conveniently, the problems of the working space and waterproof processing in the prior art are solved, and the cost is saved.
Description
Technical field
The present invention relates to a kind of for deep big foundation pit without post reinforced concrete support framework and building method thereof, among the technical field being mainly used in geotechnical engineering.
Background technology
For planar dimension and all larger deep big foundation pit of cutting depth, the inner support foundation pit supporting method of current domestic employing is mainly cast-in-situ steel reinforced concrete and supports.The layout form of reinforced concrete support mainly contains: grid type, to support truss, angle brace truss, fringe truss, annular brace etc.Supporting member is divided into horizontal shore and vertical support column, column is arranged on Liang Liang and crosses node location, and material is steel pipe or shaped steel lattice, and every root post divides into a pile base, mainly bear vertical load, also bear the part of horizontal load supporting and be delivered on column simultaneously.Column spacing is generally 8 ~ 12 meters, planar dimension is greater than to the deep big foundation pit of 100x100 rice, and hole inner column can reach tens of even up to a hundred.When planning to build basement construction, column needs through basement bottom board and floor.There are the following problems for current technology:
1: owing to being distributed with a large amount of column in foundation ditch, when foundation ditch carries out every layer of soil excavation, need to dodge column when excavator operation and earthwork outward transport, greatly reduce shoveling work efficiency, in addition the synergistic effect such as weather and appearance of the city control, make pit earthwork excavate progress slow, thus extend foundation ditch service time and overall duration, adverse effect is caused to deep pit monitor, programming.
2: owing to there is a large amount of supporting member and column in foundation ditch, when making to plan to build basement structure construction, working space is narrow, work efficiency reduces.
3: because column spacing is less, and be steel work, in soil excavation process, various equipment easily causes damage to it, thus affects deep pit monitor.
4: a large amount of column needs through basement bottom board, although base plate place worn by column all arrange steel plate for sealing water, because the waterproofing course of basement bottom board is worn out by column, waterproof slab effect is difficult to ensure.
5: because every root post has pile foundation, significantly increase the cost of inner support support engineering, especially in soft clay area.
Summary of the invention
The technical problem to be solved in the present invention be to provide a kind of for deep big foundation pit without post reinforced concrete support framework and building method thereof, improve pit earthwork excavation efficiency, more be convenient to plan to build basement structure construction, solve working space and a waterproofing work difficult problem for current technology, cost-saving.
The present invention is achieved through the following technical solutions.
For deep big foundation pit without a post reinforced concrete support framework, comprising:
Two enclosure bodies, comprise multiple campshed, and above-mentioned campshed vertically pierces in the soil outside foundation ditch two side side by side;
Two strengthening mechanisms, comprise multiple stand column pile, and above-mentioned stand column pile vertically to pierce side by side in the soil outside foundation ditch two side and is positioned at the side of above-mentioned enclosure body near foundation ditch two side;
Multiple arched girder in arch be arranged side by side, its two ends are separately fixed at above-mentioned strengthening mechanism, and above-mentioned arched girder two side portions is positioned under earth's surface, and mid portion is positioned on earth's surface;
Horizontal support mechanism, comprises multiple horizontal shore, above-mentioned horizontal shore horizontally set side by side, and its two ends are separately fixed at the enclosure body top outside foundation ditch two side.
Further, above-mentioned strengthening mechanism also includes multiple edge column, and above-mentioned edge column is vertically arranged, and inserts the pile body of above-mentioned stand column pile, and above-mentioned edge column is fixedly installed the first column supporting beam, the second upright supports beam from top to bottom successively.
Further, above-mentioned arched girder comprises cambered beam, two lower arched girders, and above-mentioned cambered beam is the mid portion be positioned on earth's surface, and two lower arched girders are the two side portions be positioned under earth's surface, and one end of above-mentioned lower arched girder is fixed on above-mentioned second upright supports beam.
Further, above-mentioned lower arched girder is provided with English truss beam, above-mentioned English truss beam comprises a main frame beam and multiple from setting a roof beam in place, the two ends of above-mentioned main frame beam are separately fixed at the end place that the interlude of above-mentioned lower arched girder and above-mentioned horizontal shore are fixed on enclosure body, above-mentioned adjacent being fixed on from head and the tail of setting a roof beam in place exists together mutually, one is fixedly connected on above-mentioned main frame beam respectively from the two ends of setting a roof beam in place and is positioned at the fixed end of above-mentioned lower arched girder and above-mentioned horizontal shore, the multiple two ends from setting a roof beam in place be fixedly connected with it are separately fixed at more than above-mentioned lower arched girder and state horizontal shore, another is fixedly connected on above-mentioned main frame beam respectively and is positioned at the fixed end of above-mentioned lower arched girder and above-mentioned strengthening mechanism from the two ends of setting a roof beam in place, the multiple two ends from setting a roof beam in place be fixedly connected with it are separately fixed at above-mentioned lower arched girder and above-mentioned strengthening mechanism.
Further, above-mentioned fixing two ends be respectively above-mentioned main frame beam be positioned at the fixed end of above-mentioned lower arched girder and above-mentioned strengthening mechanism from setting a roof beam in place, its above-mentioned strengthening mechanism connected is above-mentioned first upright supports beam.
Further, above-mentionedly also comprise skewed horizontal load mechanism for deep big foundation pit without post reinforced concrete support framework, above-mentioned skewed horizontal load mechanism comprises multiple diagonal brace, multiple staged bearing, above-mentioned staged bearing is fixed in soil, foundation ditch bottom surface and the end face of above-mentioned staged bearing is flat plans to build at the bottom of basement bottom board bed course, and the two ends of above-mentioned diagonal brace are fixedly connected with above-mentioned second upright supports beam and above-mentioned staged bearing respectively.
Further, above-mentioned enclosure body also includes Guan Liang, is connected between above-mentioned adjacent campshed by above-mentioned Guan Liang, and the two ends of above-mentioned horizontal shore anchor into above-mentioned Guan Liang.
Further, arrange multiple girt strip and be connected and fixed between above-mentioned adjacent arched girder, above-mentioned cambered beam is provided with multiple vertical pull-rod, and the two ends of above-mentioned pull-rod are separately fixed at above-mentioned cambered beam and above-mentioned horizontal shore.
Further, two Nodes that cross of above-mentioned horizontal shore and above-mentioned arched girder are respectively provided with conversion beam, and above-mentioned conversion beam is by above-mentioned horizontal shore and above-mentioned arched girder Liancheng entirety.
For the building method without post reinforced concrete support framework of deep big foundation pit, step comprises:
1) construction foundation pit side wall member space enclosing structure, campshed bored pile, forms colonnade formula at a certain distance;
2) construction foundation pit periphery is planning to build the edge column between outer wall of basement and space enclosing structure;
3) at the Guan Liang of place ground level construction space enclosing structure, and in supporting frame: horizontal shore, cambered beam, girt strip, conversion beam, pull-rod;
4) at twice in excavation pit the earthwork to design framework feet locations, and the first column supporting beam of constructing successively, the second upright supports beam, English truss beam, lower arched girder;
5) absolute altitude at the bottom of the earthwork to foundation ditch in excavation pit, and construct staged bearing, diagonal brace;
6) slight slope after-pouring basement bottom board below diagonal brace is excavated, and overall along making construction basement structure to positive negative zero.
Beneficial effect of the present invention:
(1) present invention eliminates all columns planned to build within the scope of basement, only edge column is set at margin of foundation pit, adopt pull-rod and English truss beam that the vertical load of horizontal support elements is passed to arched girder and edge column successively, achieve and support without post, for pit earthwork excavation and basement structure construction provide good plane operation space, substantially increase efficiency of construction, thus decrease foundation ditch open-assembly time, shorten the duration.Meanwhile, due to the cancellation of column and stand column pile, solve the waterproofing work difficult problem that base plate worn by column, saved cost;
(2) the present invention adopts English truss beam that space enclosing structure lower horizontal load is passed to the horizontal shore at top, decrease horizontal support number of channels, significantly reduce the horizontal support elements in foundation ditch, for pit earthwork excavation and basement structure construction provide good vertical working space, and save cost;
(3) adopt can the flower basket bolt of Shi Hanzhang in the present invention, can effectively reduce the amount of deflection in the middle part of horizontal shore, regulate brace summer stress, reduce supporting deformation, improve deep pit monitor.
Accompanying drawing explanation
Fig. 1 is structural profile schematic diagram of the present invention;
Fig. 2 is the A--A generalized section of Fig. 1;
Fig. 3 is the B--B generalized section of Fig. 1;
Fig. 4 is embodiment first operating mode schematic diagram;
Fig. 5 is embodiment second operating mode schematic diagram;
Fig. 6 is embodiment the 3rd operating mode schematic diagram;
Fig. 7 is embodiment the 4th operating mode schematic diagram;
Fig. 8 is embodiment the 5th operating mode schematic diagram;
Fig. 9 is embodiment the 6th operating mode schematic diagram.
Detailed description of the invention
According to drawings and embodiments the present invention is described in further detail below.
As shown in Figure 1, planning to build agent structure in this routine foundation ditch is F3/B3, excavation of foundation pit degree of depth 13m, plane span 80 meters, and surrounding enviroment are complicated, requires strict to deformation control of foundation pit.Pattern foundation pit supporting structure overall plan adopts campshed inner support system, and inner support adopts without post reinforced concrete support framework.
Space enclosing structure adopts campshed, see Fig. 4.Campshed 1 adopts 1000mm diameter bores castinplace pile, the long 20m of stake, forms colonnade formula at a certain distance, is connected, form campshed space enclosing structure between adjacent campshed 1 by hat beam 4.Stand column pile 12 adopts 1000mm diameter bores castinplace pile, stake top mark is high for planning to build 200mm below at the bottom of basement bottom board bed course, the long 10m of stake, edge column 13 adopts 550mmx550mm steel lattice column, be welded by 4 L160x16 angle steel and steel batten plate, edge column 13 spacing 5m, stand column pile 12 pile body 4m is inserted in bottom.
See Fig. 2, Fig. 5, horizontal shore 5 level interval 10m, totally three, sectional dimension adopts 1000x900, and the main muscle of two ends anchors into hat beam 4.Cambered beam 6 plane span 54m, spring of arch 9m, sectional dimension is 1000x900, arranges one girt strip 8 along foundation ditch span direction every 9m, and three cambered beams 6 are linked to be entirety, and girt strip 8 sectional dimension is 700x900.Respectively establish a conversion beam 9 at horizontal shore 5 and cambered beam 6 two Nodes that crosses, three horizontal shores 5 and three cambered beams 6 are linked to be entirety by conversion beam 9, and the sectional dimension of conversion beam 9 is 1800x1000.Trestle plate 18 thickness 250mm, plate top flat horizontal shore 5 back.Pull-rod about 7 two ends are connected with cambered beam 6, horizontal shore 5 respectively, and connected mode is anchoring.
See Fig. 6, Fig. 7, establish one group of English truss beam 10 below every root horizontal shore 5 two ends, often organize 6, sectional dimension is 700x700.Horizontal shore 5, lower arched girder 11, hat beam 4, first column supporting beam 14 are linked as entirety by English truss beam 10.The sectional dimension of the first upright supports beam 14 is 1000x1000, and back absolute altitude is ground, place less than 2 4m.
English truss beam 10 comprises 1 main frame beam 101 and 5 from setting a roof beam in place 102, the two ends of main frame beam 101 are separately fixed at the end place that the interlude of lower arched girder 11 and horizontal shore 5 are fixed on enclosure body, adjacent being fixed on from 102 head and the tail of setting a roof beam in place exists together mutually, one from set a roof beam in place 102 two ends be fixedly connected on fixed end and the horizontal shore that main frame beam 101 is positioned at lower arched girder respectively, 2 that are fixedly connected with it from set a roof beam in place 102 two ends be separately fixed at lower arched girder 11 with horizontal shore 5, another from set a roof beam in place 102 two ends be fixedly connected on fixed end and the first column supporting beam 14 that main frame beam 101 is positioned at lower arched girder 11 respectively, 1 that is fixedly connected with it from set a roof beam in place 102 two ends be separately fixed at lower arched girder 11 and the first column supporting beam 14.
Lower arched girder 11 is seated on the second column supporting beam 15, and the sectional dimension of the second upright supports beam 15 is 1300x1000, and back absolute altitude is ground, place less than 2 8m.
See Fig. 3, Fig. 8, Fig. 9, a diagonal brace 17 is established below every root horizontal shore, diagonal brace 17 adopts 550mmx550mm steel lattice column, be welded by 4 L160x16 angle steel and steel batten plate, a staged bearing 16 is established bottom every root diagonal brace 17, staged bearing 16 is of a size of 1500x1500x1500, and bearing end face is flat to be planned to build at the bottom of basement bottom board bed course.The upper and lower two ends of diagonal brace are connected respectively at the second column supporting beam 15 and staged bearing 16, and connected mode is be welded to connect with the built-in fitting being arranged on the second upright supports beam 15 and staged bearing 16 surface.
Work progress is as follows:
1) as shown in Figure 4, to construct on ground, place 2 campshed 1, stand column pile 11, edge column 12;
2) as shown in Figure 5, entirety is excavated to a soil excavation face 19, construction hat beam 4, horizontal shore 5, trestle plate 17, cambered beam 6, girt strip 8, conversion beam 9 and pull-rod 7, wherein the flower basket bolt of pull-rod 7 treats that above-mentioned reinforced concrete structure complete carrying out of all constructing is installed before lower one deck soil excavation, and Shi Hanzhang;
3) as shown in Figure 6, soil excavation is to " island " soil excavation face 1, and construction is lower arched girder 11, English truss beam 10, column supporting beam 1 partly;
4) as shown in Figure 7, soil excavation to " island " soil excavation face 2 21, arched girder 11, English truss beam 10, second column supporting beam 15 under constructed residual part.Treat that above-mentioned reinforced concrete structure maintenance reaches 80% of design strength, can carry out follow-up soil excavation, namely excavate the central island earthwork, now the vertical force of supporting member will be born by edge column 13;
5) as shown in Figure 8, soil excavation is to " benzvalene form " soil excavation face 22, and periphery stays soil, and construction is positioned at the staged bearing 16 planned to build below basement bottom board, installs diagonal brace 17 after bearing construction;
As shown in Figure 9, after diagonal brace 17 all installs, excavate the earthwork below it, at the bottom of whole excavation of foundation pit to foundation ditch 3, then pattern foundation pit supporting structure and soil excavation all complete, and can transfer civil engineering unit and carry out basement structure construction.
Above-described embodiment, only for technical conceive of the present invention and feature are described, its object is to allow the personage being familiar with this art can understand content of the present invention and be implemented, can not limit the scope of the invention with this.All equivalences done according to Spirit Essence of the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (10)
1. for deep big foundation pit without a post reinforced concrete support framework, it is characterized in that, comprising:
Two enclosure bodies, comprise multiple campshed, and described campshed vertically pierces in the soil outside foundation ditch two side side by side;
Two strengthening mechanisms, comprise multiple stand column pile, and described stand column pile vertically to pierce side by side in the soil outside foundation ditch two side and is positioned at the side of described enclosure body near foundation ditch two side;
Multiple arched girder in arch be arranged side by side, its two ends are separately fixed at described strengthening mechanism, and described arched girder two side portions is positioned under earth's surface, and mid portion is positioned on earth's surface;
Horizontal support mechanism, comprises multiple horizontal shore, described horizontal shore horizontally set side by side, and its two ends are separately fixed at the enclosure body top outside foundation ditch two side.
2. according to claim 1 for deep big foundation pit without post reinforced concrete support framework, it is characterized in that, described strengthening mechanism also includes multiple edge column, described edge column is vertically arranged, and insert the pile body of described stand column pile, described edge column is fixedly installed the first column supporting beam, the second upright supports beam from top to bottom successively.
3. according to claim 2 for deep big foundation pit without post reinforced concrete support framework, it is characterized in that, described arched girder comprises cambered beam, two lower arched girders, described cambered beam is the mid portion be positioned on earth's surface, two lower arched girders are the two side portions be positioned under earth's surface, and one end of described lower arched girder is fixed on described second upright supports beam.
4. according to claim 3 for deep big foundation pit without post reinforced concrete support framework, it is characterized in that, described lower arched girder is provided with English truss beam, described English truss beam comprises a main frame beam and multiple from setting a roof beam in place, the two ends of described main frame beam are separately fixed at the end place that the interlude of described lower arched girder and described horizontal shore are fixed on enclosure body, described adjacent being fixed on from head and the tail of setting a roof beam in place exists together mutually, one is fixedly connected on described main frame beam respectively from the two ends of setting a roof beam in place and is positioned at the fixed end of described lower arched girder and described horizontal shore, the multiple two ends from setting a roof beam in place be fixedly connected with it are separately fixed at described lower arched girder with described horizontal shore, another is fixedly connected on described main frame beam respectively and is positioned at the fixed end of described lower arched girder and described strengthening mechanism from the two ends of setting a roof beam in place, the multiple two ends from setting a roof beam in place be fixedly connected with it are separately fixed at described lower arched girder and described strengthening mechanism.
5. according to claim 4 for deep big foundation pit without post reinforced concrete support framework, it is characterized in that, described fixing two ends be respectively described main frame beam be positioned at the fixed end of described lower arched girder and described strengthening mechanism from setting a roof beam in place, its described strengthening mechanism connected is described first upright supports beam.
6. according to claim 2 for deep big foundation pit without post reinforced concrete support framework, it is characterized in that, describedly also comprise skewed horizontal load mechanism for deep big foundation pit without post reinforced concrete support framework, described skewed horizontal load mechanism comprises multiple diagonal brace, multiple staged bearing, described staged bearing is fixed in soil, foundation ditch bottom surface and the end face of described staged bearing is flat plans to build at the bottom of basement bottom board bed course, and the two ends of described diagonal brace are fixedly connected with described second upright supports beam and described staged bearing respectively.
7. according to claim 1-6 arbitrary described for deep big foundation pit without post reinforced concrete support framework, it is characterized in that, described enclosure body also includes Guan Liang, is connected between described adjacent campshed by described Guan Liang, and the two ends of described horizontal shore anchor into described Guan Liang.
8. according to claim 1-6 arbitrary described for deep big foundation pit without post reinforced concrete support framework, it is characterized in that, arrange multiple girt strip between described adjacent arched girder to be connected and fixed, described cambered beam is provided with multiple vertical pull-rod, and the two ends of described pull-rod are separately fixed at described cambered beam and described horizontal shore.
9. according to claim 1-6 arbitrary described for deep big foundation pit without post reinforced concrete support framework, it is characterized in that, two Nodes that cross of described horizontal shore and described arched girder are respectively provided with conversion beam, and described conversion beam is by described horizontal shore and described arched girder Liancheng entirety.
10., for the building method without post reinforced concrete support framework of deep big foundation pit, it is characterized in that, step comprises:
1) construction foundation pit side wall member space enclosing structure, campshed bored pile, forms colonnade formula at a certain distance;
2) construction foundation pit periphery is planning to build the edge column between outer wall of basement and space enclosing structure;
3) at the Guan Liang of place ground level construction space enclosing structure, and in supporting frame: horizontal shore, cambered beam, girt strip, conversion beam, pull-rod;
4) at twice in excavation pit the earthwork to design framework feet locations, and the first column supporting beam of constructing successively, the second upright supports beam, English truss beam, lower arched girder;
5) absolute altitude at the bottom of the earthwork to foundation ditch in excavation pit, and construct staged bearing, diagonal brace;
6) slight slope after-pouring basement bottom board below diagonal brace is excavated, and overall along making construction basement structure to positive negative zero.
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| CN106968256A (en) * | 2017-03-22 | 2017-07-21 | 深圳市福田建安建设集团有限公司 | Foundation ditch assembled steel trestle construction method |
| CN107059887A (en) * | 2017-05-23 | 2017-08-18 | 梁美欣 | Support system |
| CN107503355A (en) * | 2017-07-20 | 2017-12-22 | 广东省建筑工程集团有限公司 | Shaped steel formula double-row pile foundation pit supporting system and its construction method are inserted after outer row |
| CN109404003A (en) * | 2018-09-28 | 2019-03-01 | 青岛市地铁号线有限公司 | A kind of tunneling type is without column arch Metro Station Structure and construction method |
| CN110004937A (en) * | 2019-03-19 | 2019-07-12 | 上海申元岩土工程有限公司 | A kind of base pit engineering central post and supporting beam, plate junction node structure |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106968256A (en) * | 2017-03-22 | 2017-07-21 | 深圳市福田建安建设集团有限公司 | Foundation ditch assembled steel trestle construction method |
| CN106968256B (en) * | 2017-03-22 | 2019-02-22 | 深圳市福田建安建设集团有限公司 | Foundation pit assembled steel trestle construction method |
| CN107059887A (en) * | 2017-05-23 | 2017-08-18 | 梁美欣 | Support system |
| CN107503355A (en) * | 2017-07-20 | 2017-12-22 | 广东省建筑工程集团有限公司 | Shaped steel formula double-row pile foundation pit supporting system and its construction method are inserted after outer row |
| CN107503355B (en) * | 2017-07-20 | 2023-10-13 | 广东省建筑工程集团有限公司 | Externally-arranged rear-inserted steel type double-row pile foundation pit supporting system and construction method thereof |
| CN109404003A (en) * | 2018-09-28 | 2019-03-01 | 青岛市地铁号线有限公司 | A kind of tunneling type is without column arch Metro Station Structure and construction method |
| CN110004937A (en) * | 2019-03-19 | 2019-07-12 | 上海申元岩土工程有限公司 | A kind of base pit engineering central post and supporting beam, plate junction node structure |
| CN110004937B (en) * | 2019-03-19 | 2023-12-29 | 上海申元岩土工程有限公司 | Joint structure of joint of upright post and support beam and plate in foundation pit engineering |
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| CN104631469B (en) | 2016-04-13 |
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Free format text: CORRECT: APPLICANT; FROM: ANHUI URBAN CONSTRUCTION DESIGN + RESEARCH INSTITUTE TO: ANHUI URBAN CONSTRUCTION DESIGN + RESEARCH GENERAL INTITUTE CO., LTD. |
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Address after: No. 9 garden road in Hefei City Baohe District of Anhui province 230051 Patentee after: Anhui Urban Construction Design Research Institute Limited by Share Ltd Address before: No. 9 garden road in Hefei City Baohe District of Anhui province 230051 Patentee before: ANHUI URBAN CONSTRUCTION DESIGN INSTITUTE CO., LTD. |
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| CP01 | Change in the name or title of a patent holder |