CN214363506U - Steel frame external prestressed structure foundation pit supporting system - Google Patents
Steel frame external prestressed structure foundation pit supporting system Download PDFInfo
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- CN214363506U CN214363506U CN202023208623.8U CN202023208623U CN214363506U CN 214363506 U CN214363506 U CN 214363506U CN 202023208623 U CN202023208623 U CN 202023208623U CN 214363506 U CN214363506 U CN 214363506U
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- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 136
- 239000010959 steel Substances 0.000 title claims abstract description 136
- 238000010276 construction Methods 0.000 claims abstract description 26
- 239000002023 wood Substances 0.000 claims description 8
- 230000000694 effects Effects 0.000 abstract description 3
- 125000004122 cyclic group Chemical group 0.000 abstract description 2
- 238000009412 basement excavation Methods 0.000 description 8
- 239000002689 soil Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 239000004568 cement Substances 0.000 description 3
- 238000004064 recycling Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Abstract
The utility model discloses an outer prestressed construction underground structure of steelframe struts system, including a fender pile and the steelframe supporting construction who comprises a plurality of steelframe supporting construction unit stack whole, the both ends end of steelframe supporting construction unit can inlay in the fender pile recess and realize splicing in succession, connects through the bracing piece between each steelframe supporting construction unit, and the prestressing force chord line is located the periphery of steelframe and arranges along outside a week of steelframe, and the prestressing force chord line is connected with vertical end through the nut. The utility model discloses an outer prestressed construction underground structure of steelframe supporting system can use on shallow foundation pit supporting engineering, its outer prestressed chord can provide prestressing force to steel frame construction, through steelframe and prestressed chord integrated configuration, can reach low cost, large-span, the high effect that bears, and then reduce the quantity of fender pile, and this underground structure supporting system is assembled by a plurality of component modularization and is formed, can assemble and dismantle, but cyclic utilization, resources are saved, and the cost is reduced, and is suitable for being generalized to use.
Description
Technical Field
The utility model belongs to the technical field of civil engineering, a foundation ditch supporting construction technology is related to, specifically is a steel frame outer prestressed construction foundation ditch supporting system.
Background
The existing foundation pit supporting system mainly comprises row pile supporting, underground continuous wall supporting, cement retaining wall and other forms. The row pile support has the advantages that the construction cost is lower than that of an underground continuous wall, and the row pile support is only suitable for foundation pits with small depth and is not suitable for soft soil areas. The underground continuous wall has the advantages of large wall rigidity, small vibration and low noise during construction, can be constructed day and night, shortens the construction period, and has the defects of high construction cost and low economy when the underground continuous wall is just used as a containment retaining wall. The supporting cement retaining wall has the advantages of low cost, good water permeability and low bearing capacity and is easy to deform. Along with the development of urban underground space, the form of foundation pit support is more and more refined, and the market demand of a novel and optimized foundation pit support structure system is higher and higher. The main problems of the existing foundation pit supporting system are as follows: the construction method has the advantages of high construction cost, large construction range, large influence on the environment in the construction process, low bearing capacity, complex construction process, high construction difficulty, incapability of recycling, large resource waste and the like. If a row pile supporting system needs to drive a large number of row piles in a short range, the material consumption is large; the cost of underground continuous wall system and supporting cement retaining wall system is higher, and is the non-recoverable type system, if can only scrap when later stage does not need the excavation supporting, the wasting of resources is more serious.
Disclosure of Invention
The utility model aims at providing a with low costs, bear the weight of the dynamic height, can adjust by oneself needs prestressing force size, composite mounting, can dismantle, cyclic utilization's outer prestressing force structure underground structure system of steelframe to improve the not enough of prior art.
The utility model provides a technical scheme does:
the utility model provides a prestressing force structure underground structure system outside steelframe, is whole including fender pile and steelframe supporting construction, its characterized in that:
the steel frame supporting structure is integrally formed by overlapping a plurality of steel frame supporting structure units in the vertical direction, and the steel frame supporting structure units are connected into a whole through supporting rods;
the steel frame supporting structure unit comprises a steel supporting protection plate, a steel frame, a prestressed chord and a steel frame fixed pulley; a supporting pile groove for mounting the steel frame supporting structure unit is formed in the side face of the supporting pile, and the supporting pile groove is a vertical clamping groove;
the left end and the right end of the steel support guard plate are both provided with connecting parts, each connecting part comprises a vertical end head and a vertical plug, and the vertical end heads are strip-shaped plate bodies protruding out of the surface of the steel support guard plate and used for connecting prestressed chords; the shape of the vertical plug is matched with that of the supporting pile groove, and the steel frame supporting structure unit is connected with the supporting pile by inserting the vertical plug into the supporting pile groove;
the steel frame is transversely arranged between the left vertical end and the right vertical end of the steel supporting and protecting plate and is fixedly connected with the steel supporting and protecting plate;
the prestressed string is arranged on the periphery of the steel frame, the left end and the right end of the prestressed string are anchored on the left vertical end and the right vertical end of the steel supporting plate respectively through nuts, and the length of the prestressed string between the two vertical ends can be adjusted by screwing the nuts, so that the prestress is adjusted;
the steel frame fixed pulley is fixed on the outer side of the steel frame and used for erecting the prestressed string.
On the basis of the above scheme, a further improved or preferred scheme further comprises:
furthermore, the steel frame is an arched steel frame, and the outer side of the steel frame is a circular arc-shaped steel frame beam.
Furthermore, the transverse groove width of the supporting pile groove is larger than the transverse thickness of the vertical plug, so that after the vertical end is embedded into the supporting pile groove, a space for transverse movement is reserved to make up for a distance error generated when the supporting pile is adjusted in the piling process.
Furthermore, the support rods are connected with the steel frames of the steel frame supporting structure units through the coil buckling type nodes.
Furthermore, a plurality of support rods are arranged in a net shape in a crossed mode and cover the periphery of each steel frame supporting structure unit.
Furthermore, the cross section of the supporting pile groove is in a dry shape, and the shape of the vertical end corresponds to that of the supporting pile groove.
Preferably, the steel frame is arranged at the middle position of the height of the steel support guard plate.
Further, the utility model discloses the outer prestressed construction underground structure of steelframe excavation supporting system still is equipped with the body of purlin unanimous with a fender pile groove shape and volume for during filling in a fender pile recess before the pile, prevent that the foreign matter from getting into. Preferably, the balk body can be wood balk.
Has the advantages that:
the utility model discloses steel frame outer prestressing force structure underground structure supporting system can use on shallow pit supporting engineering, and its outer prestressing force chord can provide prestressing force to steel frame construction, through steelframe and prestressing force chord integrated configuration, can reach low cost, large-span, high effect of bearing, and then reduce the quantity of fender pile. And this excavation supporting system is assembled by a plurality of component modularization and is formed, can assemble detachably, circulated use saves the resource, reduces construction cost, is fit for using widely.
Drawings
FIG. 1 is an axonometric view of a foundation pit supporting system of a steel frame external prestressed structure in a specific embodiment;
FIG. 2 is a front view of a steel frame external prestressed structure foundation pit supporting system in the concrete embodiment;
FIG. 3 is an isometric view of several steel frame support structure units assembled (without support rods) according to an embodiment;
FIG. 4 is an isometric view of a steel frame support structure unit according to an embodiment;
FIG. 5 is a top view of a steel frame external prestressed structure foundation pit support system in a specific embodiment;
FIG. 6 is a top plan view of the support system in the exemplary embodiment shown in splicing position;
FIG. 7 is a schematic structural view of a joint of a steel frame, a prestressed chord and a steel frame fixed pulley in the embodiment;
FIG. 8 is a schematic view of the vertical end, pre-stressed chord and nut connection in the exemplary embodiment;
reference numerals: the method comprises the following steps of 1-supporting piles, 2-supporting pile grooves, 3-steel frame supporting structure integration, 4-steel frame supporting structure units, 5-steel supporting plates, 6-steel frames, 7-vertical end heads, 8-prestressed chords, 9-steel frame fixed pulleys, 10-nuts and 11-supporting rods.
Detailed Description
In order to clarify the technical solution and the working principle of the present invention, the present invention is described in detail with reference to the accompanying drawings and the specific embodiments.
As shown in fig. 1 and 2, the foundation pit supporting system with the steel frame external prestressed structure comprises supporting piles 1, a steel frame supporting structure whole body 3, supporting rods 11, wood beams and other components.
The steel frame supporting structure whole body 3 is composed of a plurality of superposed steel frame supporting structure units 4, and each steel frame supporting structure unit 4 is composed of a steel supporting plate 5, a steel frame 6, a prestressed chord 8, a steel frame fixed pulley 9 and the like.
The left side and the right side of the support pile 1 are both provided with support pile grooves 2 used for installing steel frame support structure units 4, the support pile grooves 2 are vertical clamping grooves, and the cross sections of the support pile grooves are in a dry shape.
The left end and the right end of the steel supporting plate 5 are both provided with connecting portions, and each connecting portion comprises a vertical end 7 and a vertical plug. The vertical end 7 is composed of a steel plate fixed on the surface of the steel supporting plate 5, is a vertical strip-shaped plate body protruding out of the surface of the steel supporting plate 5 and is used for connecting the prestressed string 8. The shape of vertical plug with prop up fender pile recess 2 adaptation, but the size is less than the size of a fender pile recess 2 for vertical plug is inserted and is inside back in a fender pile recess 2, and steel fender board 5 can't break away from with steel fender board 5 on the horizontal direction, but has the wide loose measure of certain activity again in the transverse direction, in order to compensate the interval error that fender pile 1 produced when the pile is driven.
As shown in fig. 6, the support pile recess 2 in the shape of "dry" has a transverse groove (one end communicating with the outside) and two longitudinal grooves, and accordingly, the vertical plug includes a transverse riser and two longitudinal risers. If the steel frame supporting structure unit 4 is arranged at the part between the two supporting piles 1, the size of the steel frame supporting structure unit is 6m multiplied by 3m (horizontal transverse length multiplied by vertical height), the size of the cross section of the supporting pile 1 is 600mm multiplied by 800mm, the transverse groove width of the two longitudinal grooves is 200mm, the cross section thickness of the two corresponding longitudinal vertical plates is 100mm, and after the vertical plug is inserted into the supporting pile groove 2, a movable gap of 100mm is formed between the longitudinal vertical plates and the groove walls of the longitudinal grooves, so that the steel frame supporting structure unit can be used for adjusting the distance error generated during piling.
The steel frame 6 is an arched steel frame and comprises an arc-shaped steel frame beam positioned on the outer side, a plurality of longitudinal beams and a supporting beam, wherein the longitudinal beams are connected with the arc-shaped steel frame beam and the steel supporting plate 5, and the supporting beam is connected with the arc-shaped steel frame beam and the longitudinal beams in an oblique diagonal manner, as shown in fig. 5.
The steel frame 6 is transversely arranged at the horizontal axial middle shaft of the steel supporting plate 5, and two ends of the steel frame extend to the positions of the left vertical end 7 and the right vertical end 7, namely, the steel frame is positioned between the two vertical ends 7 and is fixedly connected with the steel supporting plate 5.
The prestressed chord 8 is transversely arranged on the periphery of the steel frame 6, and the height position corresponds to the steel frame 6. The left and right ends of the prestressed chord 8 are anchored on the left and right vertical ends 7 of the steel supporting plate 5 through nuts 10. As shown in fig. 8, the end of the prestressed chord 8 is provided with a thread, the vertical end 7 is provided with a corresponding through hole for allowing the prestressed chord 8 to pass through, and the prestressed chord 8 is locked and fixed on the vertical end 7 by a nut 10. When the nut is screwed, the length of the prestressed string 8 between the two vertical ends 7 can be adjusted, and the prestress of the prestressed string 8 is changed, so that the lateral supporting capacity of the foundation pit supporting system of the steel frame external prestressed structure is adjusted. Meanwhile, the outer part of the arc-shaped steel frame beam of the steel frame 6 is provided with a fulcrum for limiting and installing the prestressed string 8, as shown in fig. 7, the prestressed string 8 bypasses from a steel frame fixed pulley 9, and the steel frame fixed pulley 9 is fixedly installed at the middle position of the outer part of the arc-shaped steel frame beam.
As shown in fig. 1 and 2, a plurality of upper and lower steel-frame supporting structure units 4 assembled between two supporting piles 1 are connected by support rods 11, and the plurality of support rods 11 form a net structure in a cross distribution manner to cover the outer sides of the steel-frame supporting structure units 4. Each support rod 11 is connected with the steel frame of each steel frame supporting structure unit 4 through a coil buckle type node, and the stacked steel frame supporting structure units 4 are connected into a whole.
The shape and the volume of the wood purlin are consistent with those of the supporting pile groove 2, and the wood purlin is used for being plugged into the supporting pile groove 2 before piling to block the supporting pile groove 2 so as to prevent foreign matters from entering before the steel frame supporting structure unit 4 is assembled.
In this embodiment, the construction method of the steel frame external prestressed structure foundation pit supporting system includes the following steps:
determining the quantity of materials of a foundation pit supporting system: and determining a sufficient number of support piles 1 and the steel frame support structure whole 3 according to the size of the foundation pit in actual construction. The steel support guard plate 5, the steel frame 6, the prestressed chords 8, the nuts 10 and other components forming the whole steel frame support structure 3 can be of scattered structures, and are assembled after being transported to the field.
Determining the excavation range of the foundation pit: and paying off the specific excavation range of the foundation pit according to the requirements of actual engineering projects, wherein the obtained excavation range of the foundation pit still meets the requirement that the whole space between the support piles is 6 m. Because the steel frame 6, the prestressed chord 8 and the support rod 11 of the foundation pit supporting system with the steel frame external prestressed structure are arranged on one side inside the foundation pit, the width occupied by the structural system is considered when the foundation pit range is determined.
Thirdly, driving a supporting pile: and (2) piling one supporting pile 1 at intervals of 6m, wherein the embedding depth of the supporting pile 1 below the horizontal plane of the foundation pit is not less than 0.5 time of the depth of the foundation pit, before piling, equal-volume wood purlin needs to be filled into a supporting pile groove 2 of the supporting pile 1, the wood purlin and the supporting pile 1 are simultaneously piled into the soil, and after the supporting pile 1 is piled to the corresponding depth, the wood purlin is pulled out.
Fourthly, excavating a foundation pit: and excavating the foundation pit according to the foundation pit excavation range determined by the support piles.
Assembling a steel frame supporting structure unit: the steel supporting plates 5 and the steel frames 6 are assembled into a plurality of steel frame supporting structure units, the prestressed strings 8 are anchored on the vertical end heads 7 through nuts 10, the soil pressure is roughly determined according to the soil layer where the foundation pit is located, the load applied to a supporting system is calculated, the nuts are tightened according to the load, and a prestress is applied to the prestressed strings 8 so as to improve the bearing capacity of the supporting system.
Sixthly, placing a steel frame supporting structure unit: after the excavation of the foundation pit is finished, the parts between the support piles 1 are excavated, and the plurality of steel frame support structure units 4 are inserted into the support pile grooves 2 of the left and right support piles 1 to be placed. And all the steel frame supporting structure units 4 are erected up and down to form a whole steel frame supporting structure. After the steel frame supporting structure units 4 form the whole steel frame supporting structure, the support rods 11 are connected between the steel frame nodes of the steel frame supporting structure units 4, so that the whole stress performance of the supporting system is enhanced.
And seventhly, supporting and stressing the foundation pit.
Disassembling and recycling: when the engineering in the foundation pit is finished and soil needs to be backfilled, the plurality of steel frame supporting structure units 4 are pulled out one by one from top to bottom, and finally, after all the steel frame supporting structure units 4 are pulled out, all the supporting piles 1 are pulled out, and finally, soil backfilling work is carried out. After all the materials are pulled out, the dismantling work of each rod piece and the prestressed chord is carried out, and various materials are sorted and classified for the next use.
The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (9)
1. The utility model provides a prestressing force structure underground structure system outside steelframe, includes fender pile (1) and the whole (3) of steelframe supporting construction, its characterized in that:
the steel frame supporting structure whole body (3) is formed by overlapping a plurality of steel frame supporting structure units (4) in the vertical direction, and the steel frame supporting structure units (4) are connected into a whole through supporting rods (11);
the steel frame supporting structure unit (4) comprises a steel supporting protection plate (5), a steel frame (6), a prestressed string (8) and a steel frame fixed pulley (9); a supporting pile groove (2) for mounting a steel frame supporting structure unit (4) is formed in the side face of the supporting pile (1), and the supporting pile groove (2) is a vertical clamping groove;
the left end and the right end of the steel supporting protection plate (5) are respectively provided with a connecting part, the connecting parts comprise vertical end heads (7) and vertical plugs, and the vertical end heads (7) are strip-shaped plate bodies protruding out of the surface of the steel supporting protection plate (5) and are used for connecting prestressed strings (8); the shape of the vertical plug is matched with that of the supporting pile groove (2), and the steel frame supporting structure unit (4) is connected with the supporting pile (1) by inserting the vertical plug into the supporting pile groove (2);
the steel frame (6) is transversely arranged between the left vertical end (7) and the right vertical end (7) of the steel supporting and protecting plate (5) and is fixedly connected with the steel supporting and protecting plate (5);
the prestressed string (8) is arranged on the periphery of the steel frame (6), the left end and the right end of the prestressed string are anchored on the left vertical end (7) and the right vertical end (7) of the steel support guard plate (5) through nuts (10), and the length of the prestressed string (8) between the two vertical ends (7) can be adjusted by screwing the nuts, so that the prestress can be adjusted;
and the steel frame fixed pulley (9) is fixed on the outer side of the steel frame (6) and is used for erecting a prestressed string (8).
2. The steel frame external prestressed structure foundation pit supporting system of claim 1, wherein: the steel frame (6) is an arched steel frame, and the outer side of the arched steel frame is a circular arc-shaped steel frame beam.
3. The foundation pit supporting system with the steel-frame external prestressed structure as claimed in claim 1, wherein the transverse groove width of the supporting pile groove (2) is larger than the transverse thickness of the vertical plug, so that after the vertical end head (7) is embedded into the supporting pile groove (2), a space for transverse movement is still left, and the spacing error generated when the supporting pile (1) is adjusted during piling is compensated.
4. The steel-frame external prestressed structure foundation pit supporting system according to claim 1, wherein said supporting rods (11) are connected to the steel frame of each steel-frame supporting structure unit (4) through coil-fastened nodes.
5. The foundation pit supporting system with the steel-frame external prestressed structure as claimed in claim 4, wherein the plurality of supporting rods (11) are arranged in a cross manner to form a net shape and cover the periphery of each steel-frame supporting structure unit (4).
6. The foundation pit supporting system with the steel-frame external prestressed structure as claimed in claim 1, wherein the cross section of the supporting pile groove (2) is in a dry shape, and the shape of the vertical end (7) corresponds to the shape of the supporting pile groove.
7. The foundation pit supporting system with the steel-frame external prestressed structure as claimed in claim 1, wherein the steel frame (6) is arranged at a middle position of the height of the steel supporting plate (5).
8. The steel frame external prestressed structure foundation pit supporting system according to any one of claims 1-7, wherein a balk body with the same shape and volume as the supporting pile groove (2) is further provided for being plugged into the supporting pile groove (2) before piling to prevent foreign matters from entering.
9. The steel frame external prestressed structure foundation pit supporting system of claim 8, wherein said brace body is a wood brace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023208623.8U CN214363506U (en) | 2020-12-28 | 2020-12-28 | Steel frame external prestressed structure foundation pit supporting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023208623.8U CN214363506U (en) | 2020-12-28 | 2020-12-28 | Steel frame external prestressed structure foundation pit supporting system |
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| Publication Number | Publication Date |
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| CN214363506U true CN214363506U (en) | 2021-10-08 |
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| CN202023208623.8U Expired - Fee Related CN214363506U (en) | 2020-12-28 | 2020-12-28 | Steel frame external prestressed structure foundation pit supporting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113846652A (en) * | 2021-11-15 | 2021-12-28 | 福建路港（集团）有限公司 | Adjustable prestress stainless steel pipe arch foundation pit supporting system |
-
2020
- 2020-12-28 CN CN202023208623.8U patent/CN214363506U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113846652A (en) * | 2021-11-15 | 2021-12-28 | 福建路港（集团）有限公司 | Adjustable prestress stainless steel pipe arch foundation pit supporting system |
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