CN209260744U - A kind of steel tube-concrete pile foundation as temporary base - Google Patents
A kind of steel tube-concrete pile foundation as temporary base Download PDFInfo
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- CN209260744U CN209260744U CN201821875073.5U CN201821875073U CN209260744U CN 209260744 U CN209260744 U CN 209260744U CN 201821875073 U CN201821875073 U CN 201821875073U CN 209260744 U CN209260744 U CN 209260744U
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- steel
- steel pipe
- cushion cap
- hole stake
- stake
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Abstract
The steel tube-concrete pile foundation as temporary base of the utility model, it is characterised in that: including hole stake, steel pipe, cushion cap and steel pipe column Temporary Piers, hole stake and steel pipe are respectively positioned among ground, and steel pipe is located at the lower section of hole stake and coaxial line；Hole stake is by the coagulation local soil type of steel reinforcement cage and package steel reinforcement cage at the upper end of steel pipe is mutually fixed with the lower end of steel reinforcement cage, and cushion cap is fixed on the upper end of hole stake, and steel pipe column Temporary Piers are fixed on cushion cap.The steel tube-concrete pile foundation of the utility model combines steel-pipe pile with hole stake, and suitable for building interim pier foundation in the narrow spanning existing railway of working space, highway environment, beneficial effect is significant, is suitable for the application of popularization.
Description
Technical field
The utility model relates to a kind of pile foundations as temporary base, more specifically, more particularly to a kind of as interim
The steel tube-concrete pile foundation on basis.
Background technique
In bridge construction, it is frequently run onto the construction environment of spanning existing railway Xian He highway, in bridge cross-line bridge construction,
It is in place that superstructure usually uses incremental launching method.Interim pier foundation as transition is during Large Span Bridges incremental launching construction
It is vital component part.However, the construction environment of cross-line bridge is complicated in many cases, in a plurality of existing railway line
Between when building interim pier foundation, level of ground water narrow by working space is limited, it is caused to use limited even nothing
Method uses large scale equipment organizing construction, increases difficulty of construction；Or influenced by execution conditions, large scale equipment can not reach construction
Scene makes construction be obstructed.
Basis can be divided into shallow foundation and deep foundation according to buried depth.Wherein, shallow foundation is divided into rigid foundation and flexible base
Plinth, deep foundation are divided into tube caisson foudations, well foundation, pneumatic caisson foundation etc..And these two types of bases lead to during constructing and implementing
Often big machinery is needed to drill, there is operation sides it is larger, number of devices is more the problems such as, be not suitable for work surface
Relatively narrow overbridge.At the same time, if using such basis as the temporary base of overbridge, it be easy to cause a large amount of resource wave
Take, increase construction cost, and is unfavorable for the control of construction period.Existing steel pipe pile foundation is more applied to temporary support structure,
But its bearing capacity is lower, stability is poor, is unable to satisfy the bridge construction temporary structure compared with high-bearing capacity requirement.
Summary of the invention
The utility model in order to overcome the shortcomings of the above technical problems, it is mixed to provide a kind of steel pipe-as temporary base
Solidifying soil pile foundation.
The steel tube-concrete pile foundation as temporary base of the utility model, it is characterised in that: including hole stake, steel pipe, hold
Platform and steel pipe column Temporary Piers, hole stake and steel pipe are respectively positioned among ground, and steel pipe is located at the lower section of hole stake and coaxial line；Hole stake
By the coagulation local soil type of steel reinforcement cage and package steel reinforcement cage at the upper end of steel pipe is mutually fixed with the lower end of steel reinforcement cage, and cushion cap is fixed on hole
The upper end of stake, steel pipe column Temporary Piers are fixed on cushion cap.
The steel tube-concrete pile foundation as temporary base of the utility model, the cushion cap are steel plate or armored concrete
Structure is fixedly connected as the reinforcing bar in the steel plate or reinforced concrete structure of cushion cap with the steel reinforcement cage in the stake of hole.
The steel tube-concrete pile foundation as temporary base of the utility model, the steel pipe column Temporary Piers by angle steel and
Bolt is anchored on cushion cap.
The steel tube-concrete pile foundation as temporary base of the utility model, under the upper end and steel reinforcement cage of the steel pipe
End is connected by welding.
The beneficial effects of the utility model are: the steel tube-concrete pile foundation as temporary base of the utility model, by hole
Stake, steel pipe, cushion cap and steel pipe column Temporary Piers composition, hole stake is again by steel reinforcement cage and coagulation local soil type at by by steel after pore digging
Pipe is squeezed into the soil layer of bottom, so that the depth of entire pile foundation is deepened；Make after the peripheral casting concrete of steel reinforcement cage
Being formed by hole stake has high intensity, and the lap of steel reinforcement cage upper end and steel pipe is attached fixation by welding,
The bonding strength that ensure that lower part steel pipe Yu upper hole stake also ensures the cushion cap being fixed in the stake of hole, is fixed on cushion cap
The intensity of steel pipe column Temporary Piers forms the interim pier foundation met the requirements；The building course of entire pile foundation is not necessarily to big machinery
Equipment, only need personnel dig stake holes, and with crane by steel pipe, reinforcing bar cage hoisting in place, suitable for narrow across both in working space
There is railway, build interim pier foundation in highway environment, beneficial effect is significant, is suitable for the application of popularization.
The steel tube-concrete pile foundation as temporary base of the utility model has the advantage that compared with the existing technology
(1), narrow work surface quick construction is easy；
(2), Effect of Underground Water Level is small；
(3), speed of application is fast, is conducive to shorten the construction period；
(4), reduce the use of concrete, reduce cost, reduce the wasting of resources；
(5), after bridge incremental launching construction, steel pipe column Temporary Piers recoverable is conducive to environmental protection.
Detailed description of the invention
Fig. 1 is the main view of the steel tube-concrete pile foundation as temporary base of the utility model；
Fig. 2 is the top view of the steel tube-concrete pile foundation as temporary base of the utility model；
Fig. 3 is the bottom view of the steel tube-concrete pile foundation as temporary base of the utility model.
In figure: the stake of 1 hole, 2 steel pipes, 3 steel reinforcement cages, 4 concrete, 5 cushion caps, 6 steel pipe column Temporary Piers.
Specific embodiment
The utility model is described in further detail with embodiment with reference to the accompanying drawing.
As shown in Figure 1, Figure 2 and Figure 3, the steel tube-concrete stake as temporary base of the utility model is set forth
Main view, the top and bottom perspective views of base are made of hole stake 1, steel pipe 2, cushion cap 5 and steel pipe column Temporary Piers 6, shown in hole
Stake 1 is made of steel reinforcement cage 3 and concrete 4, and steel pipe 2 is located at the lower section of hole stake 1, and steel pipe 2, hole 1 are at vertical state, and steel pipe
2 are coaxially arranged with hole stake 1.Hole stake 1 is formed in the stake holes 1 dug out by worker's layering, and the bottom of stake holes is protruded into the upper end of steel pipe 2
Portion, 3 lower part of the steel reinforcement cage part Chong Die with 2 upper end of steel pipe weld together, to realize the secured connection of steel pipe 2 Yu steel reinforcement cage 3.
Shown in cushion cap 5 be fixed on the upper end of hole stake 1, cushion cap 5 can be used reinforced concrete member, steel plate can also be used,
When cushion cap 5 is using reinforced concrete member, the upper end of bar construction and steel reinforcement cage 3 in cushion cap 5 binds or welds together,
When cushion cap 5 is using steel plate, the upper end of steel reinforcement cage 3 should be welded on.Steel pipe column Temporary Piers 6 are the steel pipe with certain length
Column, lower end are fixed on cushion cap 5, and steel pipe column Temporary Piers 6 are set according to the height of to be carried of position.
In the steel tube-concrete pile foundation building process as temporary base of the utility model, stake holes is by artificial merogenesis
Shoveling is made, and does supporting using concrete spraying, level of ground water is excavated compared with Gao Shixu when drawing water.Steel pipe 2 is beaten using piling machine
Enter, primarily serves the effect for increasing soil strength, for steel reinforcement cage 3 using in crane lifting to stake holes, lower part and steel pipe 2 are higher by position
Welding, surrounding casting concrete 4, effect are that concrete and rebar cage is made to become an entirety, shape drilling pile 1.Concrete 4
In steel pipe top, it is filled in 3 surrounding of steel reinforcement cage, plays the role of increasing structure compression strength.Cushion cap 5 primarily serves transmitting load
Effect, steel pipe column is interim, and 6 can be anchored in above cushion cap using angle steel, bolt.
The construction method of the steel tube-concrete pile foundation as temporary base of the utility model, can by following steps come
It realizes:
A) explore soil layer, near the temporary base built region carry out geological prospecting, determine soil layer composition,
The severe and thickness of each soil layer；
B) determines borehole depth, steel pipe embedded depth, is equal to the bearing capacity and hole that steel tubing portions undertake with bearing capacity of pile foundation
The sum of the bearing capacity that stake part undertakes calculates bearing capacity of pile foundation, and is constraint item not less than engine request with bearing capacity of pile foundation
Part calculates borehole depth and steel pipe embedded depth；
C) mark construction position, determines the position for needing to carry out foundation construction, and be labeled on the ground；
D) merogenesis digs stake holes, the form cut the earth using merogenesis, digs stake holes, one section of every digging in foundation construction position by worker
Stake holes just uses concrete spraying retaining wall, until dug stake holes depth meets depth requirements；During digging stake holes, if ground
Lower water level is higher, then carries out borehole operation using the method excavated when drawing water；
E) steel pipe is squeezed into, and after stake holes is dug, steel pipe is hung in stake holes using crane, and is adjusted steel pipe and be located at stake
Hole center, is squeezed into steel pipe to designated depth using piling machine；
F) steel pipe is cut, and worker prolongs under borehole retaining wall step to stake holes bottom, is cut to steel pipe, is made steel pipe upper end
Some is stretched in stake holes；
G) steel reinforcement cage welds, and is sunk to steel reinforcement cage in stake holes with crane, keeps steel reinforcement cage in a vertical state, by worker
The bottom for arriving stake holes down welds together the lap of steel reinforcement cage and steel pipe；
H) casting concrete, the casting concrete into the stake holes for be provided with steel reinforcement cage, and filled during pouring
Divide and vibrate, steel reinforcement cage and the concrete poured are formed hole stake；
I) builds cushion cap, after concreting, after maintenance reaches design strength in 28 days, builds and holds on hole stake top
Platform；
J) steel pipe column Temporary Piers are arranged in, and steel pipe column Temporary Piers are hoisted to designated position above cushion cap, using welding or
The mode of angle steel and bolt anchoring, steel pipe column Temporary Piers are fixed on cushion cap, that is, are realized mixed as the steel pipe-of temporary base
The building of solidifying soil pile foundation.
Steel pipe 2, steel reinforcement cage 1 should be configured according to intensity needed for Practical Project, to guarantee the intensity on entire basis, concrete 4
Mixing material made of being deployed according to a certain percentage as sand, stone, water, cement, additive etc..
In the process of construction of Aksu of Xinjiang's weaving bridge, across 4 railways, for ensure the bridge across railway just
Often operation ensures smooth engineering construction and construction quality simultaneously, it is necessary to use certain solution, construction is avoided to transport railway
Battalion impacts, and therefore, reducing operation side is the difficult point and emphasis in Construction control.Just use the work of the utility model
For the steel tube-concrete pile foundation of temporary base, the bearing capacity of each pile foundation is required to reach 1536.3KN by calculating in engineering,
In process of construction:
By geological prospecting, determine soil layer be followed successively by downwards from ground silty sand ground (5.9 meters of thickness, severe 19kN/m3),
Fine sand layer (2.3 meters of thickness, severe 19kN/m3), circle gravel native (1.2 meters of thickness, severe 20kN/m3), fine sand layer (4.5 meters of thickness)
Silt (1.7 meters of thickness), fine sand layer (2.7 meters of thickness)；
And drafting borehole depth is 9m, steel pipe embedded depth is 9.3m.It is found that stake holes dig round gravel soil layer go deep into be
0.8m, depth of the steel pipe in circle gravel soil layer is 0.4m.
Steel pipe pile body perimeter u is 1.98m, and the standard value of bearing capacity of fine sand layer soil is 210kPa, the stake of steel pipe at 2 end of steel pipe
Body cross-sectional area is 0.312m2, α can be obtained by tabling look-upi、αrIt is 1.0, circle gravel from top to bottom is obtained by static sounding experiment
Soil layer, fine sand layer, powder soil horizon, fine sand layer and steel pipe pile side friction are respectively 60kPa, 35kPa, 40kPa, 50kPa, fine sand layer
Standard value of bearing capacity be 210, bring formula (1) into, the bearing capacity of steel pipe can be calculated:
Artificial digging pile stake end section area is 1.13m2, first by the calculating of following formula portal silty sand ground where stake,
The weighted average severe of fine sand layer, circle gravel soil layer:
Clear bottom Coefficient m0Take 1.0, correction factor λ to take 0.7, foundation bearing capacity with depth correction factor k25.0 are taken, hole stake
The basic feasible value of bearing capacity of circle gravel soil layer is 430kPa where lower end, and the carrying of soil layer at an end is calculated according to formula (3)
Power feasible value:
qr=m0λ[[fα0]+k2γ2(h-3)]
=1.0 × 0.7 × [430+5.0 × 22.475 × (9-3)]
=772.975 (kPa)
Circumference u ' is 3.77m outside the stake cross section of hole, and artificial digging pile stake end section area is 1.13m2, utilize formula
(2) bearing capacity of hole stake can be calculated:
By calculated steel pipe bearing capacity [Ra]1With hole pile bearing capacity [Ra]2Bringing formula (4) into can obtain:
[Ra]=[Ra]1+[Ra]2
=413.415+1449.33
=1862.745 (kN)
In conclusion the bearing capacity of pile foundation that steel-pipe pile part and artificial digging pile are partly superimposed together is 1773.855KN
> 1536.3KN meets the requirement of bearing capacity.
It is above-mentioned although specific embodiments of the present invention are described with reference to the accompanying drawings, but it is not practical new to this
The limitation of type protection scope, those skilled in the art should understand that, based on the technical solution of the present invention, ability
Field technique personnel do not need to make the creative labor the various modifications or changes that can be made still in the protection model of the utility model
Within enclosing.
Claims (4)
1. a kind of steel tube-concrete pile foundation as temporary base, it is characterised in that: including hole stake (1), steel pipe (2), cushion cap
(5) it is respectively positioned among ground with steel pipe column Temporary Piers (6), hole stake and steel pipe, steel pipe is located at the lower section of hole stake and coaxial line；
Hole stake is made of the concrete (4) of steel reinforcement cage (3) and package steel reinforcement cage, and the upper end of steel pipe is mutually fixed with the lower end of steel reinforcement cage, is held
Platform is fixed on the upper end of hole stake, and steel pipe column Temporary Piers are fixed on cushion cap.
2. the steel tube-concrete pile foundation according to claim 1 as temporary base, it is characterised in that: the cushion cap (5)
For steel plate or reinforced concrete structure, as the steel in the reinforcing bar and hole stake (1) in the steel plate or reinforced concrete structure of cushion cap
Muscle cage (3) is fixedly connected.
3. the steel tube-concrete pile foundation according to claim 1 or 2 as temporary base, it is characterised in that: the steel pipe
Column Temporary Piers (6) are anchored on cushion cap (5) by angle steel and bolt.
4. the steel tube-concrete pile foundation according to claim 1 or 2 as temporary base, it is characterised in that: the steel pipe
(2) upper end is connected by welding with the lower end of steel reinforcement cage (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821875073.5U CN209260744U (en) | 2018-11-14 | 2018-11-14 | A kind of steel tube-concrete pile foundation as temporary base |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821875073.5U CN209260744U (en) | 2018-11-14 | 2018-11-14 | A kind of steel tube-concrete pile foundation as temporary base |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209260744U true CN209260744U (en) | 2019-08-16 |
Family
ID=67554665
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821875073.5U Expired - Fee Related CN209260744U (en) | 2018-11-14 | 2018-11-14 | A kind of steel tube-concrete pile foundation as temporary base |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209260744U (en) |
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2018
- 2018-11-14 CN CN201821875073.5U patent/CN209260744U/en not_active Expired - Fee Related
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190816 Termination date: 20201114 |
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| CF01 | Termination of patent right due to non-payment of annual fee |