CN215252932U - Deep foundation pit PC steel pipe combination Larsen steel sheet pile double row pile supporting system - Google Patents
Deep foundation pit PC steel pipe combination Larsen steel sheet pile double row pile supporting system Download PDFInfo
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- CN215252932U CN215252932U CN202121886464.9U CN202121886464U CN215252932U CN 215252932 U CN215252932 U CN 215252932U CN 202121886464 U CN202121886464 U CN 202121886464U CN 215252932 U CN215252932 U CN 215252932U
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Abstract
The utility model provides a dark foundation ditch PC steel pipe combination Larsen steel sheet pile double row pile supporting system belongs to building engineering construction technical field, including the first fender pile of locating the foundation ditch outside, one side interval of keeping away from the foundation ditch of first fender pile is equipped with the second fender pile, first fender pile includes the first PC steel pipe of interval arrangement, is equipped with Larsen steel sheet pile between the adjacent first PC steel pipe, the top both sides of Larsen steel sheet pile and first PC steel pipe fixed connection, the second fender pile includes the second PC steel pipe of interval arrangement; a bracket is fixed on the basement bottom plate at the bottom of the foundation pit, and a steel pipe inclined support is arranged between the first protection pile and the bracket; the utility model discloses a double of PC steel pipe combination Larsen steel sheet pile constitution is strutted and is consolidated through the steel pipe bearing diagonal, more can satisfy special complicated silt geological environment excavation supporting construction, and the security performance is high.
Description
Technical Field
The utility model relates to a building engineering construction technical field, concretely relates to deep basal pit PC steel pipe combination Larsen steel sheet pile double row pile system of strutting.
Background
With the continuous development of economy and the acceleration of urbanization process in China, large underground projects are built in large cities. The utilization of underground space and the development of underground space play an important role in promoting the development of urban economy and social health. The deep foundation pit is an important component in underground engineering, and how to ensure the safety of the foundation pit, solve leakage and ensure that surrounding structures are not influenced in the construction process is a problem which needs to be considered and solved in the construction process.
The traditional concrete pouring support pile is adopted for excavation and support engineering of the foundation pit under the condition of closing to the peripheral complex geology of public building projects such as railway station houses, superstores, hospitals and the like, particularly under the silt geological condition, so that the construction efficiency is low, the permeability is high, and the safety is reduced.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model provides a deep basal pit PC steel pipe combination Larsen steel sheet pile double row pile supporting system, through the double support of PC steel pipe combination Larsen steel sheet pile constitution and consolidate through the steel pipe bearing diagonal, more can satisfy special complicated silt geological environment excavation supporting construction, the security performance is high.
In order to solve the technical problem, the utility model provides a deep basal pit PC steel pipe combination Larsen steel sheet pile double row pile supporting system, including the first fender pile that locates the foundation ditch outside, the one side interval of keeping away from the foundation ditch of first fender pile is equipped with the second fender pile, first fender pile includes the first PC steel pipe of interval arrangement, is equipped with Larsen steel sheet pile between the adjacent first PC steel pipe, the both sides of the top of Larsen steel sheet pile and first PC steel pipe fixed connection, the second fender pile includes the second PC steel pipe of interval arrangement; be located the basement bottom plate of foundation ditch bottom and be fixed with the bracket, be equipped with the steel pipe bearing diagonal between first fender pile and the bracket.
Further, the distance between the first protection pile and the second protection pile is 2.5. m.
Further, the diameter distance between adjacent first PC steel pipes in the first protection pile is smaller than the diameter distance between adjacent second PC steel pipes in the second protection pile, and the diameters of the first PC steel pipes and the second PC steel pipes are the same.
Furthermore, a first crown beam is arranged at the top end of the first fender pile, a second crown beam is arranged at the top end of the second fender pile, and a connecting beam is arranged between the first crown beam and the second crown beam.
Further, a gap is reserved between the top end of the Larsen steel plate pile and the top end of the first crown beam.
Further, the first crown beam, the second crown beam and the connecting beam are all cast-in-place reinforced concrete beams, and the widths of the first crown beam and the second crown beam are 50-100mm larger than the diameters of the first PC steel pipe and the second PC steel pipe.
Further, the embedded steel bars of the bracket are fixed on a basement bottom plate at the bottom of the foundation pit through concrete, one end of the steel pipe inclined support is fixed on a top plate of the bracket, and the other end of the steel pipe inclined support is fixedly connected with a connecting plate on the side face of the first crown beam.
Furthermore, the steel pipe inclined supports are arranged at intervals, and the distance between every two adjacent steel pipe inclined supports is 8 m.
Furthermore, a fertilizer groove between the outer wall of the basement and the first protection pile is backfilled densely by sand or graded broken stones.
The utility model discloses an above-mentioned technical scheme's beneficial effect as follows:
1. the utility model discloses deep basal pit PC steel pipe combination Larsen steel sheet pile double row pile struts system, through the double of PC steel pipe combination Larsen steel sheet pile constitution strut and consolidate through the steel pipe bearing diagonal, more can satisfy special complicated silt geological environment excavation supporting construction, the security performance is high.
2. The utility model discloses a deep basal pit PC steel pipe combination Larsen steel sheet pile double row pile supporting system compares the bored concrete pile and struts the construction, and PC steel pipe combination Larsen steel sheet pile is inserted and is beaten technology energy-concerving and environment-protective more, and is little to the surrounding environment influence.
3. The utility model discloses deep basal pit PC steel pipe combination Larsen steel sheet pile double row pile system of strutting, the construction selection material economy, the turnover utilization ratio is high. Compared with a concrete pouring support pile, the selected materials are common steel pipes, Larsen steel plate piles and the like, the transportation is rapid, the lease cost is low, and the manufacturing cost is reduced.
4. The utility model discloses a dark foundation ditch PC steel pipe combination Larsen steel sheet pile double row pile supporting system, the foundation ditch edge outside adopts the machine of beating of inserting to beat, the second row is vertical steel-pipe pile, inserts between the first row of vertical steel-pipe pile and beats Larsen steel sheet pile; the row piles are longitudinally connected by adopting the crown beams and transversely connected by adopting the coupling beams, the inner side of the foundation pit is connected by adopting the steel pipes and the crown beam inclined struts, the supporting work is jointly completed, and the whole construction is quicker.
Drawings
FIG. 1 is a side view of the PC steel pipe combined Larsen steel sheet pile double row pile supporting system of the deep foundation pit of the utility model;
fig. 2 is a top view of a first fender pile and a second fender pile of the present invention;
FIG. 3 is a side view of a bracket of the present invention;
fig. 4 is a top view of the middle bracket of the present invention.
1. A first protective column; 11. a first PC steel pipe; 12. larsen steel sheet piles; 13. a first crown beam; 14. a connecting plate;
2. a second fender pile; 21. a second PC steel pipe; 22. a second crown beam; 23. a connecting beam;
3. a bracket; 31. embedding reinforcing steel bars in advance; 32. a top plate;
4. the steel pipe is supported obliquely;
5. and (5) fertilizing the trough.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to fig. 1 to 4 of the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. All other embodiments, which can be derived from the description of the embodiments of the present invention by a person skilled in the art, are within the scope of the present invention.
As shown in fig. 1-4: a deep foundation pit PC steel pipe combined Larsen steel plate pile double-row pile supporting system comprises first protection piles 1 arranged on the outer side of a foundation pit, second protection piles 2 are arranged on one sides, far away from the foundation pit, of the first protection piles 1 at intervals, the first protection piles 1 comprise first PC steel pipes 11 arranged at intervals, Larsen steel plate piles 12 are arranged between the adjacent first PC steel pipes 11, two sides of the top end of each Larsen steel plate pile 12 are fixedly connected with the first PC steel pipes 11, and the second protection piles 2 comprise second PC steel pipes 21 arranged at intervals; be located the basement bottom plate of foundation ditch bottom and be fixed with bracket 3, be equipped with steel pipe bearing diagonal 4 between first fender pile 1 and the bracket 3.
And the fertilizer tank 5 between the outer wall of the basement and the first protection pile 1 is backfilled densely by sand or graded broken stones.
The double-row support formed by combining the PC steel pipes with the Larsen steel sheet piles is reinforced by the steel pipe inclined supports, the requirement for supporting construction of a foundation pit in a special complex silt geological environment can be met, and the safety performance is high.
According to one embodiment of the present invention, as shown in figure 1,
wherein the distance between the first and second fender piles 1, 2 is 2.5 m.
The radial distance between adjacent first PC steel pipes 11 in the first protection pile 1 is smaller than the radial distance between adjacent second PC steel pipes 21 in the second protection pile 2, and the diameters of the first PC steel pipes 11 and the second PC steel pipes 21 are the same.
According to another embodiment of the present invention, as shown in figures 1 and 2,
the top end of the first fender pile 1 is provided with a first crown beam 13, the top end of the second fender pile 2 is provided with a second crown beam 22, and a connecting beam 23 is arranged between the first crown beam 13 and the second crown beam 22.
Wherein a gap is reserved between the top end of the Larsen steel plate pile 12 and the top end of the first crown beam 13.
The first crown beam 13, the second crown beam 22 and the connecting beam 23 are all cast-in-place reinforced concrete beams, and the widths of the first crown beam 13 and the second crown beam 22 are 50-100mm larger than the diameters of the first PC steel pipe 11 and the second PC steel pipe 21.
In one embodiment of the present invention, as shown in figures 1, 3 and 4,
the embedded steel bars 31 of the bracket 3 are fixed on a basement bottom plate at the bottom of the foundation pit through concrete, one end of the steel pipe inclined support 4 is fixed on a top plate 32 of the bracket 3, and the other end of the steel pipe inclined support 4 is fixedly connected with the connecting plate 14 on the side face of the first crown beam 13.
The free end of the embedded steel bar 31 is provided with an arc hook.
The steel pipe inclined supports 4 are arranged at intervals, and the distance between every two adjacent steel pipe inclined supports 4 is 8 m.
A typical implementation project using the utility model: total project floor area 102302m2Wherein the first-stage land area is 86147m2Second-stage land area 16155m2. Total building area of 19289m2Wherein the ground building area is 1531m2Underground building area 17758m2The number of the basement parking spaces is 472, the engineering geological conditions in the foundation pit supporting range are sequentially 1m of plain filling soil, 13.2m of sludge, 3.2m of clay and 5.7m of silty clay gravel from top to bottom, and the average water content is 40%.
During field construction, the trap foundation pit is set out, the trench excavation range is determined, the first protection pile 1 is inserted and driven, a steel pipe pile inserting and driving machine is adopted to carry out pile driving on the first PC steel pipe 11 and Larsen steel plate pile 12 on the inner side, the length of the first PC steel pipe 11 (phi 630 multiplied by 14 steel pipes) is 20m, the distance is 1.1m, the first PC steel pipe 11 is inserted between the adjacent first PC steel pipes 11 for connection, the pile length of the first PC steel pipe 11 is 12m, after the insertion and driving of the first protection pile 1 are finished, the second protection pile 2 on the outer side begins to be constructed, the length of the second PC steel pipe 21 (630 multiplied by 14 steel pipes) is 20m, and the distance is 2.2 m.
Then, constructing a first crown beam 13, a second crown beam 22 and a connecting beam 23, pre-arranging the connecting plates 14 in advance when the first crown beam 13 is bound, wherein the cross-sectional dimensions of the first crown beam 13, the second crown beam 22 and the connecting beam 23 are 700 x 1100mm,
when the basement bottom plate is constructed, the corbels 3 are fixedly constructed at the same time, a steel pipe inclined support 4 is arranged every 8m, one end of the steel pipe inclined support 4 is welded and fixed with the connecting plate 14, and the other end of the steel pipe inclined support is welded and fixed with the top plate 32, so that supporting is completed.
The construction is quicker, energy-saving and environment-friendly, the permeability is reduced, the supporting construction of the foundation pit in the special complex silt geological environment can be met, and the safety performance is high.
In the present invention, unless otherwise explicitly specified or limited, for example, it may be fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; they may be directly connected or indirectly connected through an intermediate medium, and may be connected through the inside of two elements or in an interaction relationship between two elements, unless otherwise specifically defined, and the specific meaning of the above terms in the present invention will be understood by those skilled in the art according to specific situations.
The foregoing is a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be regarded as the protection scope of the present invention.
Claims (9)
1. Deep basal pit PC steel pipe combination Larsen steel sheet pile double row pile system of strutting, its characterized in that: the protection device comprises first protection piles (1) arranged on the outer side of a foundation pit, second protection piles (2) are arranged on one side, far away from the foundation pit, of each first protection pile (1) at intervals, each first protection pile (1) comprises first PC steel pipes (11) arranged at intervals, Larsen steel plate piles (12) are arranged between every two adjacent first PC steel pipes (11), two sides of the top end of each Larsen steel plate pile (12) are fixedly connected with the corresponding first PC steel pipe (11), and each second protection pile (2) comprises second PC steel pipes (21) arranged at intervals; be fixed with corbel (3) on the basement bottom plate that is located the foundation ditch bottom, be equipped with steel pipe bearing diagonal (4) between first fender pile (1) and corbel (3).
2. The deep foundation pit PC steel pipe combination Larsen steel sheet pile double row pile supporting system of claim 1, characterized in that: the distance between the first protection pile (1) and the second protection pile (2) is 2.5 m.
3. The deep foundation pit PC steel pipe combination Larsen steel sheet pile double row pile supporting system of claim 2, characterized in that: the diameter distance between adjacent first PC steel pipes (11) in the first protection pile (1) is smaller than the diameter distance between adjacent second PC steel pipes (21) in the second protection pile (2), and the diameters of the first PC steel pipes (11) and the second PC steel pipes (21) are the same.
4. The deep foundation pit PC steel pipe combination Larsen steel sheet pile double row pile supporting system of claim 3, characterized in that: the top end of the first fender pile (1) is provided with a first crown beam (13), the top end of the second fender pile (2) is provided with a second crown beam (22), and a connecting beam (23) is arranged between the first crown beam (13) and the second crown beam (22).
5. The deep foundation pit PC steel pipe combination Larsen steel sheet pile double row pile supporting system of claim 4, characterized in that: and a gap is reserved between the top end of the Larsen steel plate pile (12) and the top end of the first crown beam (13).
6. The deep foundation pit PC steel pipe combination Larsen steel sheet pile double row pile supporting system of claim 4, characterized in that: the first crown beam (13), the second crown beam (22) and the connecting beam (23) are all cast-in-place reinforced concrete beams, and the widths of the first crown beam (13) and the second crown beam (22) are 50-100mm larger than the diameters of the first PC steel pipe (11) and the second PC steel pipe (21).
7. The deep foundation pit PC steel pipe combination Larsen steel sheet pile double row pile supporting system of claim 4, characterized in that: the embedded steel bars (31) of the bracket (3) are fixed on a basement bottom plate at the bottom of the foundation pit through concrete, one end of the steel pipe inclined support (4) is fixed on a top plate (32) of the bracket (3), and the other end of the steel pipe inclined support (4) is fixedly connected with a connecting plate (14) on the side face of the first crown beam (13).
8. The deep foundation pit PC steel pipe combination Larsen steel sheet pile double row pile supporting system of claim 7, characterized in that: the steel pipe inclined struts (4) are arranged at intervals, and the distance between every two adjacent steel pipe inclined struts (4) is 8 m.
9. The deep foundation pit PC steel pipe combined Larsen steel sheet pile double-row pile supporting system according to any one of claims 1-8, wherein: and sand or graded broken stones are backfilled and compacted in the fertilizer groove (5) between the outer wall of the basement and the first protection pile (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121886464.9U CN215252932U (en) | 2021-08-12 | 2021-08-12 | Deep foundation pit PC steel pipe combination Larsen steel sheet pile double row pile supporting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121886464.9U CN215252932U (en) | 2021-08-12 | 2021-08-12 | Deep foundation pit PC steel pipe combination Larsen steel sheet pile double row pile supporting system |
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| CN215252932U true CN215252932U (en) | 2021-12-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837194A (en) * | 2022-05-15 | 2022-08-02 | 中冶建工集团有限公司 | Construction method for improving stability of PC (polycarbonate) composite pile |
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2021
- 2021-08-12 CN CN202121886464.9U patent/CN215252932U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114837194A (en) * | 2022-05-15 | 2022-08-02 | 中冶建工集团有限公司 | Construction method for improving stability of PC (polycarbonate) composite pile |
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