CN206591535U - Combined type cofferdam - Google Patents

Combined type cofferdam Download PDF

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Publication number
CN206591535U
CN206591535U CN201720176658.7U CN201720176658U CN206591535U CN 206591535 U CN206591535 U CN 206591535U CN 201720176658 U CN201720176658 U CN 201720176658U CN 206591535 U CN206591535 U CN 206591535U
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CN
China
Prior art keywords
steel
combined type
cofferdam
pipe pile
type cofferdam
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CN201720176658.7U
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Chinese (zh)
Inventor
屈振学
邹振中
孙玉玲
褚玉生
宣鹏
杨维威
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Seventh Engineering Co Ltd of China Railway 19th Bureau Group Co Ltd
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Seventh Engineering Co Ltd of China Railway 19th Bureau Group Co Ltd
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Abstract

The utility model provides a kind of combined type cofferdam, wherein, including steel form and multiple spaced steel-pipe piles, multiple steel-pipe piles are perpendicular to cofferdam foundation ditch, and multiple steel-pipe piles surround a construction area, the bottom of each steel-pipe pile is provided with billet and multiple shear connectors, and multiple shear connectors extend outwardly through billet from steel-pipe pile and are connected with concrete foundation, profile of the steel form along construction area surrounds a closed cavity, and steel form is abutted with multiple steel-pipe piles respectively.The combined type cofferdam, which has, makes cofferdam have enough lengths of embedment, and the advantage that stability is good, water-stagnating effect is good.

Description

Combined type cofferdam
Technical field
The utility model is related to technical field of bridge construction, specifically, is to be related to a kind of combined type cofferdam.
Background technology
At present in the heavy constructions such as building, bridge, in order to improve the stability of building structure, it typically can all build interim Property building enclosure.For example, for the excavation of foundation pit of water Bridge pier, cofferdam can be applied around foundation ditch, to be opened Dig foundation ditch, draining and base concrete and the construction such as pour.And in order to improve the security and stability of structure, applied to cofferdam Man-hour, it is necessary to consider the related requests such as its physical dimension, buried depth, force stability and antiseep, prevents the matter to construction The factors such as amount, duration, cost and security are impacted.
There are straw bag cofferdam, wood sheet-pile cofferdam, steel sheet-pile cofferdam, steel pipe pile cofferdam and reinforced concrete in conventional foundation ditch cofferdam Native diaphragm wall cofferdam etc., still, conventional foundation ditch cofferdam is in applicability, construction cost, construction period and cofferdam security performance etc. Aspect is unable to reach good effect.During especially for making cofferdam on seasonal naked rock river bed, conventional cofferdam without Method is applied to seasonal naked rock river bed, and its length of embedment and leakproof can not ensure so that construction cost height and safety wind Danger is high.In addition, during for cofferdam constructions such as deep basal pit, deep-water hole and complicated geologies, if technology controlling and process is not in place, It is easy to the major accidents such as infiltration, cofferdam deformation occur, directly construction safety is impacted, while largely serious The engineering constraint duration simultaneously increases engineering cost.
The content of the invention
In order to solve the above problems, main purpose of the present utility model, which is to provide, a kind of makes cofferdam have enough embedment deep Degree, and the combined type cofferdam that stability is good, water-stagnating effect is good.
In order to realize main purpose of the present utility model, the utility model provides a kind of combined type cofferdam, wherein, including steel Template and multiple spaced steel-pipe piles, multiple steel-pipe piles are perpendicular to cofferdam foundation ditch, and multiple steel-pipe piles surround a construction Region, the bottom of each steel-pipe pile is provided with billet and multiple shear connectors, and multiple shear connectors pass through steel from steel-pipe pile Backing plate extends outwardly and is connected with concrete foundation, and profile of the steel form along construction area surrounds a closed cavity, and punching block Plate is abutted with multiple steel-pipe piles respectively.
Further scheme is that purlin is also enclosed in combined type cofferdam including multigroup, and each group is enclosed purlin in closed cavity and divided Do not abutted with multiple steel-pipe piles, multigroup bearing of trend for enclosing purlin along steel-pipe pile is arranged at intervals.
Further scheme is that bearing of trend of each steel-pipe pile along steel-pipe pile has been positioned apart from multiple brackets, And a bracket and one group enclose purlin adjoining.
Further scheme is that combined type cofferdam also includes multigroup supporting mechanism, and one group of supporting mechanism encloses purlin with one group It is fixedly connected.
Further scheme is that bracket is made up of channel-section steel, and shear connector is made up of reinforcing bar.
Therefore, pass through the setting to combined type cofferdam of the present utility model and structure design so that combined type cofferdam There can be enough lengths of embedment, and with preferable stability and water-stagnating effect.Specifically, enter when to combined type cofferdam When row is installed, each steel-pipe pile in combined type cofferdam and the concrete continuous wall on the foundation ditch of cofferdam are fixedly connected so that Concrete continuous wall is anchored to steel-pipe pile and steel form, and passes through bottom of the concrete continuous wall to steel-pipe pile and steel form Portion is connected and sealed so that both ensured the length of embedment in combined type cofferdam, and the water-stagnating effect in cofferdam is improved again.In addition, passing through In the bottom of each steel-pipe pile, billet and shear connector are set so that steel-pipe pile can more securely with concrete continuous wall While connection, it is ensured that the stability of combined type cofferdam stress, and shear connector can be protected to combined type cofferdam, be improved The bearing capacity and shear resistance of steel-pipe pile.Also, the combined type cofferdam can be adapted on the premise of Blasting Excavation is not needed In various complicated, scraggly naked rock conditions, simplify construction procedure so that construction more facilitates and difficulty of construction is smaller.
Brief description of the drawings
Fig. 1 is the structural representation of the utility model combined type cofferdam embodiment.
Fig. 2 is the structural representation after the clipped component of the utility model combined type cofferdam embodiment.
Fig. 3 is the enlarged drawing at C in Fig. 2.
Fig. 4 is the sectional view of the steel-pipe pile of the utility model combined type cofferdam embodiment.
Fig. 5 is the enlarged drawing at B in Fig. 2.
Fig. 6 is the enlarged drawing at A in Fig. 1.
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Embodiment
Combined type cofferdam embodiment:
Referring to Figures 1 and 2, combined type cofferdam 1 include steel form 3, multiple spaced steel-pipe piles 2, it is multigroup enclose purlin 4 with And multigroup supporting mechanism 6.
As depicted in figs. 1 and 2, multiple spaced steel-pipe piles 2 are embedded on the concrete continuous wall 7 poured out, And make contour direction spread configuration of multiple steel-pipe piles 2 along the concrete continuous wall 7 poured out so that the company of multiple steel-pipe piles 2 Line surrounds a construction area.
Reference picture 3 and Fig. 4, and Fig. 2 is combined, the bottom of each steel-pipe pile 2 is provided with billet 21 and multiple shear connectors 22, multiple shear connectors 22 set and are fixedly connected with concrete foundation with extending outwardly in steel-pipe pile 2 through billet 21, It is fixedly connected with the concrete continuous wall 7 poured out.Wherein, billet 21 is used for bottom and the concrete for improving steel-pipe pile 2 The contact area of diaphragm wall 7 so that steel-pipe pile 2 can be preferably fixed on concrete continuous wall 7.In addition, steel form 3 is wrapped It is rolled on the construction area that multiple steel-pipe piles 2 are surrounded, profile of the steel form 3 along the construction area is surrounded a closed cavity 10, and steel form 3 is abutted respectively with multiple steel-pipe piles 2, the abutment points to steel form 3 and multiple steel-pipe piles 2 are welded afterwards Connect, steel form 3 is fixedly connected with multiple steel-pipe piles 2.
Specifically, as shown in figure 4, the quantity of shear connector 22 is nine, and nine shear connectors 22 are set in 3 × 3.Shear connector 22 are made up of reinforcing bar, by setting shear connector 22 so that bearing the hydraulic pressure of current in riverbed in the combined type cofferdam 1 in use When, the stress of each steel-pipe pile 2 in combined type cofferdam 1 can keep stable, and improve the bearing capacity and shearing resistance energy of steel-pipe pile 2 Power, so that the steel form 3 on steel-pipe pile 2 can stablize the hydraulic pressure for bearing current, and then ensures that combined type cofferdam 1 makes Stability, and combined type cofferdam 1 is played a protective role.Certainly, the quantity of shear connector 22 can be according in actual use Combined type cofferdam 1 required for carrying water flow pressure be adjusted correspondingly, to ensure the peace of combined type cofferdam 1 when in use Quan Xing.
Installed successively in the closed cavity that steel form 3 is surrounded it is multigroup enclose purlin 4, and make to enclose purlin 4 respectively with multiple steel-pipe piles 2 It is adjacent, and multigroup bearing of trend interval setting for enclosing purlin 4 along steel-pipe pile 2.Specifically, as shown in Figure 2 and Figure 5, at each Multiple brackets 5 are set on steel-pipe pile 2, and the bearing of trend according to engine request by multiple brackets 5 along steel-pipe pile 2 enters between-line spacing and set Put, and a bracket 5 is enclosed purlin 4 with one group and abut, then the adjoiner for enclosing purlin 4 and bracket 5 is welded, make to enclose purlin 4 with Bracket 5 is fixedly connected.Wherein, bracket 5 is by channel steel support.
, wherein it is desired to ensure that the corresponding bracket 5 on each steel-pipe pile 2 is in same level, and then cause Same group is enclosed purlin 4 and is that multiple steel-pipe piles 2 are in same level after connecting, and improves the stabilization in combined type cofferdam 1 Property, it is ensured that when in use, each steel-pipe pile 2 in combined type cofferdam 1 can stablize stress in combined type cofferdam 1.
Reference picture 6, and Fig. 1 and Fig. 2 is combined, one group of supporting mechanism 6 encloses purlin 4 with one group and is fixedly connected.Specifically, each group Supporting mechanism 6 is fixedly connected by ring flange 63 with enclosing purlin 4 respectively including multiple to dagger 61 to the two ends of dagger 61, in addition, Each is being connected to a diagonal brace 62 to dagger 61 close to the relative both sides of the one end for enclosing purlin 4, each diagonal brace 62 Two ends respectively by ring flange 63 with enclosing purlin 4, dagger 61 being fixedly connected, and diagonal brace 62 with setting at an angle to dagger 61 Put.
Wherein, it is parallel with the flow direction of riverbed current to the bearing of trend of dagger 61, dagger 61 is strengthened by setting Steel form 3 prevents water impact from causing the steel form on the flow direction to send out in the bearing capacity along riverbed current flow direction Life is compared with large deformation, to improve the safety in utilization in combined type cofferdam 1.And diagonal brace 62 is set respectively at the two ends to dagger 61, and Diagonal brace 62 is connected to dagger 61 and is enclosed between purlin 4, enable to the steel-pipe pile 2 and steel form of riverbed current flow direction 3 are more uniformly stressed, and prevent steel form 3 because the local hydraulic pressure born is excessive and occur compared with large deformation.
Therefore, the combined type cofferdam that the present embodiment is provided can have enough lengths of embedment, and with preferable Stability and water-stagnating effect.Consolidated by each steel-pipe pile and the concrete continuous wall on the foundation ditch of cofferdam in combined type cofferdam Fixed connection so that concrete continuous wall is anchored to steel-pipe pile and steel form, and by concrete continuous wall to steel-pipe pile It is connected and sealed with the bottom of steel form so that both ensured the length of embedment in combined type cofferdam, the sealing effect in cofferdam is improved again Really.In addition, by setting billet and shear connector in the bottom of steel-pipe pile so that steel-pipe pile can more securely with concrete While diaphragm wall is connected, it is ensured that the stability of combined type cofferdam stress, and shear connector can be protected to combined type cofferdam Shield, improves the bearing capacity and shear resistance of steel-pipe pile.Also, the combined type cofferdam can not need the premise of Blasting Excavation Under, it is adapted to various complicated, scraggly naked rock conditions, simplifies construction procedure so that construction more facilitates and hardly possible of constructing Degree is smaller.
The construction method embodiment in combined type cofferdam:
Referring to figs. 1 to Fig. 6, the construction method to the combined type cofferdam in the embodiment of combinations thereof formula cofferdam is illustrated, The construction method in the combined type cofferdam comprises the following steps:
Before being constructed in combined type cofferdam 1, the riverbed residing for combined type cofferdam 1 is investigated, and obtain the water in the riverbed Literary data, include the hydrology number in peak level hydrographic data, the wet season of lowest water level hydrographic data and riverbed, dry season etc. According to.
After riverbed hydrology condition survey is completed, you can rocky bed is handled, and passes through Shipborne hydraulic quartering hammer Excavator is cleared up rocky bed, rocky bed surface is kept smooth.Preferably, it can select riverbed dry season pair Constructed in combined type cofferdam 1.
Then, concrete continuous wall form is installed, specifically, concrete continuous wall internal model is installed on rocky bed and mixed Solidifying soil diaphragm wall external mold, forms the cavity to be poured of concrete continuous wall 7, and cofferdam foundation ditch is located at concrete continuous wall internal model In the region surrounded.Then underwater concreting is carried out into the cavity to be poured of concrete continuous wall, and connects concrete Concrete in continuous wall form is highly higher than the lowest water level absolute altitude in riverbed, i.e., the top of concrete continuous wall 7 is higher than riverbed Lowest water level.
Then, in the pre-buried multiple steel-pipe piles 2 in top of the concrete continuous wall 7 poured out, and multiple steel-pipe piles 2 are made along mixed Being provided at circumferentially spaced for soil diaphragm wall 7 is coagulated, and then makes line one construction area of formation of multiple steel-pipe piles 2.
Then, billet 21 and shear connector 22 are fixedly connected with the bottom of each steel-pipe pile 2, and makes shear connector 22 from steel Extend outwardly and be fixedly connected with concrete continuous wall 7 through billet 21 in pile tube 2.
Then, steel form 3 is installed, steel form 3 was wrapped on the construction area that individual steel-pipe pile 2 is surrounded, makes steel form 3 A closed cavity 10 is surrounded, and steel form 3 is welded with multiple steel-pipe piles 2 respectively, steel form 3 is fixed.So Afterwards, the junction of steel form 3 and multiple steel-pipe piles 2 is sealed, prevents combined type cofferdam 1 from seepage occurring when in use.
After connection and sealing of the steel form 3 with multiple steel-pipe piles 2 is completed, to the chamber to be poured of concrete continuous wall 7 The secondary of concrete is carried out in vivo to pour, and concrete continuous wall 7 is carried out to connect high disposal, makes the concrete continuous after secondary pour The vertical difference in height in top of concrete continuous wall 7 of the top of wall 7 than pouring for the first time is H, and H numerical value is needed according to steel-pipe pile 2 Height be adjusted, to ensure that concrete continuous wall 7 can be anchored to multiple steel-pipe piles 2 and steel form 3, and to multiple The bottom of steel-pipe pile 2 and steel form 3 is sealed, and prevents the bottom in combined type cofferdam 1 from seepage occurring when in use.
Then, after the installation and sealing to multiple steel-pipe piles 2 and steel form 3 is completed, if closed cavity 10 is deposited In ponding, the ponding in closed cavity 10 is extracted, drained, certainly, if ponding is not present in closed cavity 10, you can Exempt the step.Then, multiple brackets 5 are welded on each steel-pipe pile 2, and multiple brackets 5 are made along steel according to engine request The bearing of trend of pile tube 2 is arranged at intervals., wherein it is desired to ensure that the corresponding bracket 5 on each steel-pipe pile 2 is located at together On one horizontal plane, to ensure when purlin 4 is enclosed in installation, same group is enclosed purlin 4 and is at same level, and then raising combined type encloses The stability on weir 1, it is ensured that when in use, each steel-pipe pile 2 in combined type cofferdam 1 being capable of stability under loading in combined type cofferdam 1.
Then, installed successively from the bottom up in combined type cofferdam 1 in the closed cavity 10 and multigroup enclose purlin 4.First, by The side of the bottom in nearly combined type cofferdam 1 installs first group and encloses purlin 4, enclose purlin 4 respectively with multiple steel-pipe piles 2 by first group first Individual bracket 5 is abutted, and the adjoiner for enclosing purlin 4 and the adjacent bracket 5 of steel-pipe pile 2 is welded, and makes first group to enclose Purlin 4 is fixed on steel-pipe pile 2.Then, install second group and enclose purlin 4, enclose purlin 4 respectively with multiple steel-pipe piles 2 by second group second Individual bracket 5 is abutted, and the adjoiner for enclosing purlin 4 and the adjacent bracket 5 of steel-pipe pile 2 is welded, and makes second group to enclose Purlin 4 is fixed on steel-pipe pile 2.By that analogy.Certainly, it is necessary to which the quantity for enclosing purlin 4 installed is needed according to actual requirement of engineering It is determined.
Complete one group enclose purlin 4 after, i.e., one group of supporting mechanism 6 is installed, then carry out another group enclose purlin 4 with separately The installation of one group of supporting mechanism 6, is completed to multigroup installation for enclosing purlin 4 and multigroup supporting mechanism 6 with this.Specifically, each group of branch Mechanism 6 is protected including multiple to dagger 61, the two ends to dagger 61 are fixedly connected on one group by ring flange 63 and enclose purlin 4 On relative both sides, also, make it is parallel with the flow direction of riverbed current to the bearing of trend of dagger 61, meanwhile, it is multiple right to make Dagger 61 is arranged at intervals along perpendicular to the flow direction of riverbed current, strengthens combined type cofferdam 1 in the flow direction of riverbed current Bearing capacity.
Then, one diagonal brace 62 is respectively mounted close to the relative both sides of the one end for enclosing purlin 4 to dagger 61 at each, tiltedly The two ends of support 62 by ring flange 63 respectively with to dagger 61, enclose purlin 4 and be fixedly connected, enable to riverbed current flow direction Steel-pipe pile 2 and steel form 3 are more uniformly stressed, and prevent steel form 3 due to the local hydraulic pressure born is excessive and occur compared with Large deformation.Wherein, one group of supporting mechanism 6 encloses purlin 4 with one group and is fixedly connected.
Therefore, the construction method in the combined type cofferdam that the present embodiment is provided enables to combined type cofferdam to have enough Length of embedment, and with preferable stability and water-stagnating effect.Pass through each steel-pipe pile and cofferdam base in combined type cofferdam Concrete continuous wall on hole is fixedly connected so that concrete continuous wall is anchored to steel-pipe pile and steel form, and The bottom of steel-pipe pile and steel form is connected and sealed by concrete continuous wall so that both ensured the embedment in combined type cofferdam Depth, improves the water-stagnating effect in cofferdam again.Also, the form of construction work can avoid making needs to the progress construction of combined type cofferdam The complicated construction such as explosion, drilling is carried out to riverbed, while also causing combined type cofferdam can adapt to various complicated, uneven Naked rock condition, can as far as possible simplify construction procedure so that construction more facilitate and difficulty of construction is smaller.In addition, bottom Set billet that steel-pipe pile is connected with concrete continuous wall more securely, cut while being set in the bottom of steel-pipe pile Power key, it is possible to increase the stability of combined type cofferdam stress, and combined type cofferdam is played a protective role, improve holding for steel-pipe pile Loading capability and shear resistance.
Finally it is emphasized that the foregoing is only preferred embodiment of the present utility model, this reality is not limited to With new, for those skilled in the art, the utility model can have various change and change, all in the utility model Spirit and principle within, any modification, equivalent substitution and improvements done etc. should be included in protection model of the present utility model Within enclosing.

Claims (5)

1. combined type cofferdam, it is characterised in that including:
Multiple spaced steel-pipe piles, multiple steel-pipe piles are perpendicular to cofferdam foundation ditch, and multiple steel-pipe piles surround one Individual construction area, the bottom of each steel-pipe pile is provided with billet and multiple shear connectors, and multiple shear connectors are certainly Extend outwardly and be connected with concrete foundation through the billet in the steel-pipe pile;
Steel form, profile of the steel form along the construction area surrounds a closed cavity, and the steel form respectively with Multiple steel-pipe pile adjoinings.
2. combined type cofferdam according to claim 1, it is characterised in that:
The combined type cofferdam also include it is multigroup enclose purlin, enclosed described in each group purlin in the closed cavity and respectively with it is multiple The steel-pipe pile adjoining;
Multigroup bearing of trend for enclosing purlin along the steel-pipe pile is arranged at intervals.
3. combined type cofferdam according to claim 2, it is characterised in that:
Each bearing of trend of the steel-pipe pile along the steel-pipe pile has been positioned apart from multiple brackets, and a bracket With enclosing purlin adjoining described in one group.
4. combined type cofferdam according to claim 3, it is characterised in that:
The combined type cofferdam also includes multigroup supporting mechanism, and supporting mechanism is fixedly connected with enclosing purlin described in one group described in one group.
5. the combined type cofferdam according to claim 3 or 4, it is characterised in that:
The bracket is made up of channel-section steel;
The shear connector is made up of reinforcing bar.
CN201720176658.7U 2017-02-24 2017-02-24 Combined type cofferdam Active CN206591535U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106836247A (en) * 2017-02-24 2017-06-13 中铁十九局集团第七工程有限公司 Combined type cofferdam and its construction method

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106836247A (en) * 2017-02-24 2017-06-13 中铁十九局集团第七工程有限公司 Combined type cofferdam and its construction method

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