CN205804365U - A kind of cap excavation method top board node structure - Google Patents

A kind of cap excavation method top board node structure Download PDF

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Publication number
CN205804365U
CN205804365U CN201620611293.1U CN201620611293U CN205804365U CN 205804365 U CN205804365 U CN 205804365U CN 201620611293 U CN201620611293 U CN 201620611293U CN 205804365 U CN205804365 U CN 205804365U
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China
Prior art keywords
retaining
board
row
vertical
vertical retaining
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CN201620611293.1U
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Chinese (zh)
Inventor
徐军林
江建红
杜欣
张波
李新军
田森
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China Railway Siyuan Survey and Design Group Co Ltd
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China Railway Siyuan Survey and Design Group Co Ltd
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Abstract

The utility model discloses a kind of cap excavation method top board node structure, it is characterised in that: respectively having applied a vertical retaining structure of row along foundation ditch both sides sidewall, the top of described vertical retaining structure is notch cuttype, and the two ends of top board are cast at the ladder of vertical retaining structure.It, by cutting the vertical retaining structure of part as applying the fulcrum of top board, simplifies construction technology, shortens the construction period, it is ensured that construction quality.Secondly, this utility model in side wall and top board intersection without construction joint, it is possible to increase the globality of structure, and then improve structure tension performance and impervious water resistance.Meanwhile, this utility model utilizes existing vertical retaining structure as the retaining structure of the above soil body of top board, it is not necessary to additionally apply retaining structure, and operation is simple, good economy performance.

Description

A kind of cap excavation method top board node structure
Technical field
This utility model relates to civil engineering deep foundation pit technology field, is specifically related to a kind of cap excavation method top board node structure.
Background technology
Along with city space closeness be continuously increased with road traffic the busiest, municipal administration and civil engineering deep basal pit Difficulty of construction and require the most increasing, the application of cap excavation method is more and more wider.The process of top board and building enclosure node is The heavy difficult point of digging method construction, mostly existing top board node is embedded bar connector in building enclosure, when the later stage applies top board Roof steel bar is connected with building enclosure.Construction level is required the highest, especially for bored concrete pile, reinforcing bar connector by this node Pre-buried position is most important to the construction of top board structure, and existing construction technology is accurately determined for the pre-buried more difficult of reinforcing bar connector Position, the most pre-buried connector generally cannot use during later stage top board construction, can only be solved by modes such as bar plantings, construction Effect is poor.Meanwhile, existing top board node can leave construction joint at side wall and top board node, and at node, stress is concentrated, construction The existence of seam affect structure stress, and impervious waterproof unfavorable to structure, leaves hidden danger for later stage use.Another kind of process side Formula is above for top board building enclosure entirely to be cut, and additionally construction supporting structure is as a gear component of the above soil body of top board, increases Provisional input and remaining working procedure, construction investment and duration all increase.Therefore, existing cap excavation method top board node structure Adaptability and economy are difficult to meet day by day complicated surrounding enviroment demand.
Summary of the invention
In place of the purpose of this utility model is to overcome above-mentioned the deficiencies in the prior art, and provide a kind of cap excavation method top board joint Dot structure.It, by cutting the vertical retaining structure of part as applying the bearing of top board, simplifies construction technology, shortens construction Duration, it is ensured that construction quality.
The purpose of this utility model is reached by following measure: a kind of cap excavation method top board node structure, its feature It is: respectively having applied a vertical retaining structure of row along foundation ditch both sides sidewall, the top of described vertical retaining structure is notch cuttype, top The two ends of plate are cast at the ladder of vertical retaining structure.
Further, the first row retaining structure reinforcing bar being parallel to each other and it is vertically arranged with in described vertical retaining structure Two row's retaining structure reinforcing bars, the length of first row retaining structure reinforcing bar is longer than second row retaining structure reinforcing bar, and second row props up gear knot Part plain concrete above structure reinforcing bar is cut.
Further, described vertical retaining structure side dressing makees there is side wall, and the lower surface of described top board is corresponding with side wall top Place is provided with support rim.
Further, a spaced middle standing pillar of row has all been applied at the top longeron of described top board, in described top board Being provided with two row's roof steel bar, the end of two row's roof steel bar the most vertically bends, the equal court of vertical kink of each roof steel bar Another corresponding roof steel bar extends, and the vertical kink of two corresponding roof steel bar mutually staggers.
Further, described vertical retaining structure is diaphram wall or bored concrete pile.
Advantage of the present utility model is: this utility model is by cutting the vertical retaining structure of part as applying propping up of top board Point, it is not necessary to embedded bar connector in vertical retaining structure, simplifies construction technology, shortens the construction period, it is ensured that execute Working medium amount.Secondly, this utility model in side wall and top board intersection without construction joint, it is possible to increase the globality of structure, Jin Erti High structure tension performance and impervious water resistance.Meanwhile, this utility model utilize existing vertical retaining structure as top board with The retaining structure of the upper soil body, it is not necessary to additionally apply retaining structure, operation is simple, good economy performance.
Accompanying drawing explanation
Fig. 1 is structural representation of the present utility model.
Fig. 2 is the structural representation applying vertical retaining structure and middle standing pillar.
Fig. 3 is first time earth excavation and the structural representation cutting the vertical retaining structure of part, and wherein dotted portion shows Go out and cut vertical retaining structure.
In figure, 1 vertical retaining structure, 2 top boards, 3 are cut vertical retaining structure, 4 middle standing pillars, 5 tops Slab muscle, 6.1 first row retaining structure reinforcing bars, 6.2 second row retaining structure reinforcing bars, 7 first time earth excavations, 8 Side wall, 9 support rims.
Detailed description of the invention
Describe performance of the present utility model below in conjunction with the accompanying drawings in detail, but it is not intended that limit of the present utility model Fixed, only illustrate.Simultaneously by explanation, advantage of the present utility model will become clearer from easy to understand.
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of cap excavation method top board node structure, respectively apply a row along foundation ditch both sides sidewall and erected To retaining structure 1, the top of vertical retaining structure 1 is notch cuttype, and the two ends of top board 2 are cast in the ladder of vertical retaining structure 1 Place, vertical retaining structure 1 is diaphram wall or bored concrete pile.As it is shown on figure 3, dotted portion is for be cut vertical retaining structure 3, After excavation earth excavation 7 for the first time, cut the vertical retaining structure 1 of part so that the top of vertical retaining structure 1 is notch cuttype, It is rectangle by the cross section cutting vertical retaining structure 3.
Wherein, the first row retaining structure reinforcing bar 6.1 being parallel to each other and second row it are vertically arranged with in vertical retaining structure 1 Retaining structure reinforcing bar 6.2, the length of first row retaining structure reinforcing bar 6.1 is longer than second row retaining structure reinforcing bar 6.2, and second row props up Part plain concrete above gear structure reinforcing bars 6.2 is cut.Described vertical retaining structure 1 side dressing makees have side wall 8, described top board The lower surface of 2 and corresponding position, side wall 8 top are provided with support rim 9.
Wherein, all applied a spaced middle standing pillar of row 4 at the top longeron of described top board 2, seen Fig. 2.Described top Being provided with two row's roof steel bar 5 in plate 2, the end of two row's roof steel bar 5 the most vertically bends, each roof steel bar 5 the most curved Folding part all extends towards another corresponding roof steel bar 5, and the vertical kink of two corresponding roof steel bar 5 is the most wrong Open.
As shown in Figure 1, Figure 2, Figure 3 shows, a kind of construction method for cap excavation method top board node structure, including following operation:
1) according to the stressing conditions of the vertical retaining structure of pattern foundation pit supporting structure computational analysis 1, calculate and determine vertical retaining structure 1 Size and arrangement of reinforcement, then, applied vertical retaining structure 1, while applying vertical retaining structure 1, calculated by pattern foundation pit supporting structure Analyze the stressing conditions of middle standing pillar 4, calculate size and the arrangement of reinforcement determining middle standing pillar 4, then apply the centre in foundation ditch and stand Post 4, is shown in Fig. 2;
2) carry out first time earth excavation 7 in foundation ditch, see Fig. 3;
3) cut the vertical retaining structure 1 of part as applying the bearing of top board 2, cut the thickness of vertical retaining structure 3 Not less than 300mm, the thickness of the vertical retaining structure 1 of reservation meets the supporting as top board 2 axil angle above soil body retaining structure Requirement.
4) according to earthing and the stressing conditions of top traffic load analytical calculation top board 2, calculate determine top board 2 size and Arrangement of reinforcement, applies grooving at the pit earthwork that both sides vertical retaining structure 1 is other before top board 2, is used for applying support rim 9, groove Pour together with top board 2;
5) backfill earthing, recovers road surface.
In practice of construction, determined according to calculating by the thickness cutting vertical retaining structure 3, cut vertical retaining structure As long as the thickness of 3 meets top board 2 bearing width requirement, more vertical retaining structure 1 should be retained to meet the soil body as far as possible The supporting requirement of retaining structure.Should calculate according to foundation ditch geological conditions and surrounding enviroment before first step earth excavation 7, necessary Time temporary support can be set in foundation ditch.After above-mentioned working procedure completes, use along making or the inverse downward excavation pit of mode made, Carry out computational analysis according to factors such as foundation ditch geological conditions, surrounding enviroment condition, basement structure forms, carry out setting up support, Then it is excavated to substrate, and completes main structure construction.
The foregoing is only preferred embodiment of the present utility model, not in order to limit this utility model, all in this practicality Any amendment, equivalent and the improvement etc. made within novel spirit and principle, are all contained in protection model of the present utility model Within enclosing.

Claims (5)

1. a cap excavation method top board node structure, it is characterised in that: respectively apply a row along foundation ditch both sides sidewall and vertically prop up gear knot Structure, the top of described vertical retaining structure is notch cuttype, and the two ends of top board are cast at the ladder of vertical retaining structure.
Cap excavation method top board node structure the most according to claim 1, it is characterised in that: in described vertical retaining structure vertically It is provided with the first row retaining structure reinforcing bar and second row retaining structure reinforcing bar being parallel to each other, the length of first row retaining structure reinforcing bar Degree is longer than second row retaining structure reinforcing bar, and the part plain concrete above second row retaining structure reinforcing bar is cut.
Cap excavation method top board node structure the most according to claim 1 and 2, it is characterised in that: by described vertical retaining structure Having applied side wall, the lower surface of described top board and corresponding position, side wall top are provided with support rim.
Cap excavation method top board node structure the most according to claim 1 and 2, it is characterised in that: at the top longeron of described top board All apply a spaced middle standing pillar of row, in described top board, be provided with two row's roof steel bar, the end of two row's roof steel bar Portion the most vertically bends, and the vertical kink of each roof steel bar all extends towards another corresponding roof steel bar, and two relatively The vertical kink of the roof steel bar answered mutually staggers.
Cap excavation method top board node structure the most according to claim 1, it is characterised in that: described vertical retaining structure is underground Diaphragm wall or bored concrete pile.
CN201620611293.1U 2016-06-21 2016-06-21 A kind of cap excavation method top board node structure Active CN205804365U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201620611293.1U CN205804365U (en) 2016-06-21 2016-06-21 A kind of cap excavation method top board node structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201620611293.1U CN205804365U (en) 2016-06-21 2016-06-21 A kind of cap excavation method top board node structure

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105951844A (en) * 2016-06-21 2016-09-21 中铁第四勘察设计院集团有限公司 Roof node structure adopting cover-excavation method and construction method of roof node structure

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105951844A (en) * 2016-06-21 2016-09-21 中铁第四勘察设计院集团有限公司 Roof node structure adopting cover-excavation method and construction method of roof node structure
CN105951844B (en) * 2016-06-21 2018-04-03 中铁第四勘察设计院集团有限公司 A kind of cap excavation method top plate node structure and its construction method

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