CN211571734U - Composite multi-row pile foundation pit supporting structure - Google Patents
Composite multi-row pile foundation pit supporting structure Download PDFInfo
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- CN211571734U CN211571734U CN201922357402.8U CN201922357402U CN211571734U CN 211571734 U CN211571734 U CN 211571734U CN 201922357402 U CN201922357402 U CN 201922357402U CN 211571734 U CN211571734 U CN 211571734U
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Abstract
The utility model discloses a many row of stake underground structure of combined type relates to underground structure's technical field, and it includes the double row stake, still including locating the double row stake is close to the front-seat stake of the inside one side of foundation ditch, the pile bolck of front-seat stake is less than the pile bolck of double row stake, the pile bolck of front-seat stake is not higher than the pile bolck of double row stake, just the pile bolck of front-seat stake is higher than the foundation ditch bottom, the front-seat stake with be equipped with the tie-beam between the double row stake. The utility model discloses have the beneficial effect that prevents that the foundation ditch edge from subsiding and a fender pile produces the displacement.
Description
Technical Field
The utility model belongs to the technical field of the technique of excavation supporting and specifically relates to a combined type multi-row pile excavation supporting construction is related to.
Background
With the rapid development of urban construction, deep foundation pit engineering is more and more, the construction difficulty is more and more, and various foundation pit supporting modes emerge along with the construction. The double-row pile structure has the advantages of good deformation control effect, strong stability of the supporting structure, strong applicability and the like, and is widely applied to the field of domestic deep foundation pit engineering. However, with the occurrence of ultra-deep foundation pits, the conventional double-row pile structure sometimes faces the difficult problem of overlarge displacement of the pile body in the excavation process of the foundation pit.
In order to solve the problems, the utility model discloses a combined type multi-row pile foundation pit supporting structure, including front row pile, back row pile, jet grouting pile, prefabricated reinforced concrete square pile, hat roof beam I, hat roof beam II, hat roof beam III, even tie roof beam I and even tie roof beam II, the top of front row pile, back row pile and jet grouting pile is equipped with hat roof beam I respectively, hat roof beam II and hat roof beam III, connects through even tie roof beam I and even tie roof beam II between hat roof beam I, hat roof beam II and the hat roof beam III respectively, and the jet grouting pile takes the segmentation jet grouting construction, and the consolidation body diameter of its terminal position can corresponding increase formation enlarged footing anchor body, and after the jet grouting pile construction, inserts prefabricated reinforced concrete square pile wherein before its steady quality.
The utility model discloses a device constitutes the multi-row pile supporting construction of combined type, can effectively improve supporting system's antidumping performance and rigidity, and the pile body displacement of effective control later stage excavation in-process also can regard as the deformation control measure that excavation later stage newly increases.
However, the above-mentioned retaining structure for the foundation pit has the following disadvantages: in the arid sandy soil area, the general earth surface soil is loose, the fixing capacity of the piles is poor, the soil in the deep part of the earth surface is dense, the piles are fixed firmly, in the foundation pit supporting structure, the depth of the rotary spraying piles is shallow, so that the soil in the arid area has a poor fixing effect, the rotary spraying piles are used for fixing the original double-row piles, the fixing effect is poor, and particularly for the double-row pile supporting structure of a deep foundation pit, the rotary spraying piles in the earth surface play a weak role because the depth of the double-row piles is deep.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, the utility model aims at providing a combined type multi-row pile underground structure, it has the beneficial effect that prevents that the foundation ditch edge from collapsing and a fender pile produces the displacement.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
the utility model provides a many camps of combined type underground structure, includes the double row pile, still including locating the double row pile is close to the front row pile of the inside one side of foundation ditch, the pile bolck of front row pile is less than the pile bolck of double row pile, the pile bolck of front row pile is not higher than the pile bolck of double row pile, just the pile bolck of front row pile is higher than the foundation ditch bottom, the front row pile with be equipped with the tie-beam between the double row pile.
By adopting the technical scheme, the double-row piles are firstly drilled on the ground to form a primary support, then the foundation pit is excavated in the range limited by the double-row piles, the edge of the foundation pit is surrounded by the double-row piles, and because the depth of the foundation pit is shallow at the beginning of excavation and the depth of the double-row piles buried into the ground is deep, the double-row piles can completely provide soil at the edge of the foundation pit at the upper layer, so that the foundation pit is prevented from sinking; when a certain height is excavated below a foundation pit, leveling the foundation pit close to the edge, excavating a circle of pile holes at the leveling position, constructing front-row piles, wherein the distance between the front-row piles and the nearest double-row piles is equal, and finally constructing a connecting beam between the front-row piles and the double-row piles; meanwhile, the connecting beam forms a support between the double-row piles and the foundation pit, and the effect of preventing the double-row piles from toppling over and generating displacement is achieved.
The present invention may be further configured in a preferred embodiment as: the double-row pile comprises inner ring piles and outer ring piles, the inner ring piles and the outer ring piles are arranged in a staggered mode, and the inner ring piles are connected with the adjacent two outer ring piles in an embedded mode.
Through adopting above-mentioned technical scheme, inner circle stake and outer lane stake are because the position is different, and consequently, the power of bearing is different, supports each other between two rows of stakes, has increased the cross-sectional thickness of double row stake, and the stability of double row stake is stronger.
The present invention may be further configured in a preferred embodiment as: the front row of piles are cast-in-place piles, steel reinforcement cages are arranged in the cast-in-place piles, and crown beams are arranged at the tops of the front row of piles.
By adopting the technical scheme, the front row piles have certain bending resistance and anti-overturning capacity, are not easy to damage, have better supporting effect, are further connected into a whole by arranging the crown beams, and can transmit stress at any position to other front row piles through the crown beams, so that the local collapse of the front row piles is avoided.
The present invention may be further configured in a preferred embodiment as: and the top of the reinforcement cage in the front row of piles penetrates out of the front row of piles and is poured in the crown beam.
Through adopting above-mentioned technical scheme, it is even as an organic whole inseparabler through the steel reinforcement cage between hat roof beam and each front row stake, prevent fracture and layering, simultaneously the hat roof beam can be with each front row stake close coupling again, finally reaches the inseparable continuous between a plurality of front row stakes, prevents that the part from collapsing and the displacement.
The present invention may be further configured in a preferred embodiment as: the connecting beam bottom is equipped with prefabricated steel sheet, is connected through the stock between prefabricated steel sheet and hat roof beam and the double row pile, prefabricated steel sheet is L shape, a lateral wall of prefabricated steel sheet is hugged closely hat roof beam top, and another lateral wall is hugged closely the lateral wall of inner circle pile, be equipped with the connecting hole on two lateral walls of prefabricated steel sheet, the stock runs through the connecting hole is squeezed into hat roof beam with in the double row pile.
Through adopting above-mentioned technical scheme, prefabricated steel sheet is used for bearing the weight of the tie-beam, and simultaneously, prefabricated steel sheet is injectd the position of front row pile and double row pile through the stock, when double row pile has the slope to the inside side of foundation ditch, converts the displacement into the power to the front row pile through prefabricated steel sheet, and the front row pile is much more stable than double row pile, therefore the front row pile can carry out stable support to the double row pile, prevents that the double row pile from collapsing to the foundation ditch inside and empting.
The present invention may be further configured in a preferred embodiment as: the tie-beam is the cast-in-place roof beam of concrete, the stock is worn out prefabricated steel sheet one end pour in inside the tie-beam.
Through adopting above-mentioned technical scheme, the tie-beam has carried out intimate connection through having carried out between stock and prefabricated steel sheet, double row pile, the hat roof beam, and then plays the effect of transmitting the power of toppling of double row pile to the front row pile together with prefabricated steel sheet, further prevents that double row pile or front row pile from taking place to topple.
The present invention may be further configured in a preferred embodiment as: still include temporary support, temporary support including the anchor in the sleeper of double row pile near earth's surface one end, the top is equipped with the stull between the sleeper on the double row pile on the relative both sides of foundation ditch.
Through adopting above-mentioned technical scheme, the sleeper at both ends is backed up to both sides with the stull, and the sleeper is again with the effort on double row pile, prevents that the double row pile of both sides from taking place the displacement or collapsing to foundation ditch one side slope.
The present invention may be further configured in a preferred embodiment as: the cross brace comprises a first support rod and a second support rod which are coaxially connected, and the first support rod is in threaded connection with the second support rod.
Through adopting above-mentioned technical scheme, at first threaded connection between first vaulting pole and the second vaulting pole for can be the vertically put into between two sleepers in the stull both ends, then rotate first vaulting pole or second vaulting pole, make keeping away from each other between first vaulting pole and the second vaulting pole, can be firmly and inseparable butt on the sleeper up to the both ends of stull, thereby accomplish building of interim strut.
The present invention may be further configured in a preferred embodiment as: and the sleeper is provided with an insertion hole for inserting the end part of the cross brace.
Through adopting above-mentioned technical scheme, the jack is fixed a position the stull both ends for the stull both ends are not only restricted on the horizontal direction, also can not take place to remove in vertical plane, even the stull both ends are not hard up, the stull can not take place the whereabouts yet, has guaranteed construction safety.
To sum up, the utility model discloses a following at least one useful technological effect:
1. because the height of the front row of piles is smaller, and the front row of piles are built after the foundation pit is excavated to a certain depth, the stratum in the deep part of the foundation pit is compact, and the holding force to the front row of piles is larger, so that the front row of piles can bear the force of the soil layer at the edge of the foundation pit better than double rows of piles, the bottom edge of the foundation pit is stably supported, and the lower edge of the foundation pit is prevented from collapsing; meanwhile, the connecting beam forms a support between the double-row piles and the foundation pit, and the double-row piles are prevented from toppling and displacing;
2. through setting up temporary support for in the work progress, the sleeper at both ends is backed up to both sides with the stull, and the sleeper is again with the effort on double row pile, further prevents that the double row pile of both sides from taking place the displacement or collapsing to foundation ditch one side slope.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
FIG. 2 is a schematic cross-sectional view taken along the line A-A in FIG. 1.
Fig. 3 is a partially enlarged schematic view of a portion B in fig. 2.
Fig. 4 is a partially enlarged schematic view of a portion C in fig. 2.
In the figure, 1, double rows of piles; 11. pile in inner circle; 12. an outer ring pile; 2. front row piles; 3. a reinforcement cage; 4. a connecting beam; 5. a crown beam; 6. prefabricating a steel plate; 7. an anchor rod; 8. crossties; 9. a cross brace; 91. a first stay bar; 92. a second brace bar.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, fig. 2, for the utility model discloses a many row of stake underground structure of combined type, including the double row stake 1 with locate double row stake 1 and be close to the pile 2 of the front row of stake inside one side of foundation ditch, the pile top of the front row stake 2 is less than the pile top of double row stake 1, the pile bottom of the front row stake 2 is not higher than the pile bottom of double row stake 1, and the pile top of the front row stake 2 is higher than the foundation ditch bottom, the pile bottom of the front row stake 2 in this embodiment is with high at the bottom of the pile of double row stake 1, double row stake 1 includes inner circle stake 11 and outer lane stake 12, the setting of staggering between inner circle stake 11 and the outer lane stake 12, and inner circle stake 11 is connected with the equal gomphosis of two adjacent outer lane stakes 12, be equipped with tie-beam 4 between front row stake 2 and the double row stake.
Referring to fig. 2 and 3, the front row pile 2 is a cast-in-place pile, a steel reinforcement cage 3 is arranged in the cast-in-place pile, a crown beam 5 is built at the top of the front row pile 2, and the top of the steel reinforcement cage 3 inside the front row pile 2 penetrates out of the front row pile 2 and is poured inside the crown beam 5. The setting up of steel reinforcement cage 3 makes preceding row of piles 2 have certain bending resistance and antidumping ability, and difficult emergence is damaged, struts the effect better, and the setting up of hat roof beam 5 further links all preceding row of piles 2 as an organic whole, and the atress of arbitrary position can be through hat roof beam 5 transmit all the other preceding row of piles 2 on, avoids taking place the local of preceding row of piles 2 and sinks. Simultaneously, crown 5 and each front row pile 2 are more inseparable even as an organic whole through steel reinforcement cage 3, prevent to break off and the layering, and crown 5 can be with each front row pile 2 close coupling simultaneously, finally reaches the inseparable continuous of between a plurality of front row piles 2, prevents that the part from collapsing and the displacement.
Referring to fig. 2 and 3, a prefabricated steel plate 6 is arranged at the bottom of the connecting beam 4, the prefabricated steel plate 6 is connected with the crown beam 5 and the double-row piles 1 through anchor rods 7, the prefabricated steel plate 6 is L-shaped, one side wall of the prefabricated steel plate 6 is tightly attached to the top of the crown beam 5, the other side wall of the prefabricated steel plate is tightly attached to the side wall of the inner ring pile 11, connecting holes are formed in the two side walls of the prefabricated steel plate 6, and the anchor rods 7 penetrate through the connecting holes and are driven into the crown beam 5 and. The tie-beam 4 is the cast-in-place roof beam of concrete, and 6 one ends of prefabricated steel sheet are worn out to stock 7 and are pour inside the tie-beam 4.
Prefabricated steel sheet 6 is used for bearing connecting beam 4, simultaneously, prefabricated steel sheet 6 is injectd front row pile 2 and double row pile 1's position through stock 7, when double row pile 1 has the slope to the inside orientation of foundation ditch, convert the displacement into the power to front row pile 2 through prefabricated steel sheet 6, and front row pile 2 is more stable than double row pile 1, because of front row pile 2 can carry out stable support to double row pile 1, prevent that double row pile 1 from collapsing to the foundation ditch inside and toppling over. The connecting beam 4 is closely connected with the prefabricated steel plate 6, the double-row piles 1 and the crown beam 5 through the anchor rods 7, and then plays a role of transmitting the overturning force of the double-row piles 1 to the front-row piles 2 together with the prefabricated steel plate 6, so that the double-row piles 1 or the front-row piles 2 are further prevented from overturning.
Referring to fig. 1 and 2, the utility model discloses a combined type multi-row pile underground structure still includes temporary support, and temporary support includes anchor in the sleeper 8 that double row pile 1 is close to earth's surface one end, and relative jack has been seted up on the sleeper 8 on the double row pile 1 on the both sides that the foundation ditch is relative, and the top is equipped with stull 9 between the sleeper 8, and the stull 9 both ends all insert in the jack on the sleeper 8. The cross brace 9 props the sleepers 8 at the two ends open towards the two sides, the sleepers 8 apply force to the double-row piles 1 again, the double-row piles 1 on the two sides are prevented from inclining towards one side of the foundation pit and being displaced or collapsed, and the temporary support can be detached after construction is completed.
Referring to fig. 4, in order to ensure that the cross brace 9 can be smoothly placed between two sleepers 8 and can tightly prop up the sleepers 8, the cross brace 9 in this embodiment of the present invention includes a first brace 91 and a second brace 92 which are coaxially connected, and the first brace 91 is in threaded connection with the second brace 92, wherein the second brace 92 is shorter in length.
When the personnel is installed, at first threaded connection between first vaulting pole 91 and the second vaulting pole 92, make between two sleepers 8 can be put into by the vertically in stull 9 both ends, then rotate second vaulting pole 92, make keeping away from each other between first vaulting pole 91 and the second vaulting pole 92, in the jack that can firmly and inseparable butt on sleeper 8 is up to stull 9's both ends, thereby accomplish the buildding of temporary support, in the work progress afterwards, the jack is fixed a position stull 9 both ends, make stull 9 both ends not only restricted in the horizontal direction, also can not take place to remove in vertical plane, even stull 9 both ends are not hard up, stull 9 also can not take place the whereabouts, construction safety has been guaranteed.
The utility model discloses an implement the principle and do: in the construction process, firstly, holes are punched on the ground to form double-row piles 1 to form a primary support, then, a foundation pit is excavated in a range limited by the double-row piles 1, the edge of the foundation pit is surrounded by the double-row piles 1, and because the depth of the foundation pit is shallow and the depth of the double-row piles 1 buried underground is deep, the double-row piles 1 can completely provide soil at the edge of the foundation pit on the upper layer, so that the foundation pit is prevented from collapsing; when a certain height is excavated below a foundation pit, leveling the foundation pit close to the edge, excavating a circle of pile holes at the leveling position, constructing front row piles 2, wherein the distance between the front row piles 2 and the nearest double row piles 1 is equal, and finally constructing a connecting beam 4 between the front row piles 2 and the double row piles 1, because the height of the front row piles 2 is smaller, and the front row piles 2 are constructed after the foundation pit is excavated to a certain depth, the stratum in the deep part of the foundation pit is more compact, the holding force on the front row piles 2 is larger, the front row piles 2 can bear the force of the soil layer at the edge of the foundation pit better than the double row piles 1, thereby stably supporting the edge at the bottom of the foundation pit and preventing the edge of the lower part of the foundation pit from sinking; meanwhile, the connecting beam 4 forms a support between the double-row piles 1 and the foundation pit, and the effect of preventing the double-row piles 1 from toppling over and generating displacement is achieved.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (9)
1. The utility model provides a combined type multi-row pile foundation ditch supporting construction, includes double row pile (1), its characterized in that: still including locating double row pile (1) is close to front row pile (2) of the inside one side of foundation ditch, the pile bolck of front row pile (2) is less than the pile bolck of double row pile (1), the pile bolck of front row pile (2) is not higher than at the bottom of the pile of double row pile (1), just the pile bolck of front row pile (2) is higher than the foundation ditch bottom, front row pile (2) with be equipped with tie-beam (4) between double row pile (1).
2. The composite multi-row pile foundation pit supporting structure of claim 1, wherein: the double-row pile (1) comprises inner ring piles (11) and outer ring piles (12), the inner ring piles (11) and the outer ring piles (12) are arranged in a staggered mode, and the inner ring piles (11) are connected with the adjacent two outer ring piles (12) in an embedded mode.
3. The composite multi-row pile foundation pit supporting structure of claim 2, wherein: the front row pile (2) is a cast-in-place pile, a reinforcement cage (3) is arranged in the cast-in-place pile, and a crown beam (5) is arranged at the top of the front row pile (2).
4. The composite multi-row pile foundation pit supporting structure of claim 3, wherein: the top of a reinforcement cage (3) in the front row of piles (2) penetrates out of the front row of piles (2) and is poured in the crown beam (5).
5. The composite multi-row pile foundation pit supporting structure of claim 4, wherein: the connecting beam (4) bottom is equipped with prefabricated steel sheet (6), is connected through stock (7) between prefabricated steel sheet (6) and hat roof beam (5) and double row pile (1), prefabricated steel sheet (6) are L shape, a lateral wall of prefabricated steel sheet (6) is hugged closely hat roof beam (5) top, and another lateral wall is hugged closely the lateral wall of inner circle stake (11), be equipped with the connecting hole on two lateral walls of prefabricated steel sheet (6), stock (7) run through the connecting hole is squeezed into hat roof beam (5) with in the double row pile (1).
6. The composite multi-row pile foundation pit supporting structure of claim 5, wherein: the connecting beam (4) is a concrete cast-in-place beam, and the anchor rod (7) penetrates out of one end of the prefabricated steel plate (6) and is poured inside the connecting beam (4).
7. The composite multi-row pile foundation pit supporting structure of claim 1, wherein: still include temporary support, temporary support including the anchor in sleeper (8) that double row pile (1) are close to earth's surface one end, the top is equipped with stull (9) between sleeper (8) on double row pile (1) on the relative both sides of foundation ditch.
8. The composite multi-row pile foundation pit supporting structure of claim 7, wherein: the cross brace (9) comprises a first brace rod (91) and a second brace rod (92) which are coaxially connected, and the first brace rod (91) is in threaded connection with the second brace rod (92).
9. The composite multi-row pile foundation pit supporting structure of claim 8, wherein: and the sleeper (8) is provided with an insertion hole for inserting the end part of the cross brace (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922357402.8U CN211571734U (en) | 2019-12-24 | 2019-12-24 | Composite multi-row pile foundation pit supporting structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922357402.8U CN211571734U (en) | 2019-12-24 | 2019-12-24 | Composite multi-row pile foundation pit supporting structure |
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| Publication Number | Publication Date |
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| CN211571734U true CN211571734U (en) | 2020-09-25 |
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| CN201922357402.8U Active CN211571734U (en) | 2019-12-24 | 2019-12-24 | Composite multi-row pile foundation pit supporting structure |
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