CN211312543U - Deep foundation pit supporting combined structure for quicksand section - Google Patents
Deep foundation pit supporting combined structure for quicksand section Download PDFInfo
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- CN211312543U CN211312543U CN201922215499.9U CN201922215499U CN211312543U CN 211312543 U CN211312543 U CN 211312543U CN 201922215499 U CN201922215499 U CN 201922215499U CN 211312543 U CN211312543 U CN 211312543U
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- foundation pit
- larsen steel
- quicksand
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- bracket
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Abstract
The utility model provides a deep basal pit supporting composite structure for quicksand section, including Larsen steel sheet pile, bracket, connecting beam and bored concrete pile, the bottom of Larsen steel sheet pile and the bottom of bored concrete pile are all squeezed into soil, the bracket is welded in the inboard of Larsen steel sheet pile, the connecting beam supports on the top surface of bracket and with bracket welded fastening, the connecting beam with the side of Larsen steel sheet pile dorsad foundation ditch inner wall support and lean on; the cast-in-place pile is abutted against one side, facing away from the Larsen steel sheet pile, of the connecting cross beam. The deep foundation pit supporting combination structure can effectively prevent quicksand, has enough strength and does not influence the use of the internal space of a foundation pit.
Description
Technical Field
The utility model relates to a building engineering technical field, concretely relates to deep basal pit supporting integrated configuration for shifting sand section.
Background
In order to ensure the safety of underground structures and buildings around the foundation pit, support measures need to be taken on the side wall of the foundation pit and the surrounding environment in the process of deep foundation pit construction, and the row piles and the Larsen steel sheet piles are common support structures. The row piles are foundation pit supporting structures which are formed by arranging certain pile types in a queue type, and the Larsen steel sheet piles are foundation pit supporting structures which are formed by connecting and mutually locking a plurality of steel sheet piles through joints. For quicksand geology, the pile arrangement strength is high, the use of the internal space of a foundation pit is flexible, but a certain gap exists between pile foundations, and the quicksand resistance is poor; the Larsen steel sheet pile has good quicksand resistance, but has low strength, a support system needs to be arranged in the foundation pit, and the support system is used for improving the overall stability of the Larsen steel sheet pile by arranging dense support rod structures in the foundation pit and connecting the steel sheet piles which are oppositely arranged by utilizing the support rod structures. However, the use of the internal space of the foundation pit is seriously influenced, and a lot of inconvenience is brought to mechanical operation. Therefore, the single adoption of the row piles and the Larsen steel sheet piles for supporting the foundation pit is not suitable for the quicksand geology.
SUMMERY OF THE UTILITY MODEL
In view of the above problems, there is a need for a deep foundation pit supporting combination structure for quicksand geology, which can effectively prevent quicksand and has sufficient strength without affecting the use of the internal space of the foundation pit.
In order to achieve the above purpose, the utility model adopts the technical proposal that:
a deep foundation pit supporting and protecting combined structure for a quicksand section comprises Larsen steel plate piles, bracket brackets, connecting cross beams and cast-in-place piles, wherein the bottoms of the Larsen steel plate piles and the bottoms of the cast-in-place piles are all driven into soil, the bracket brackets are welded on the inner sides of the Larsen steel plate piles, the connecting cross beams are supported on the top surfaces of the bracket brackets and are fixedly welded with the bracket brackets, and the connecting cross beams are abutted against the side faces, back to the inner wall of a foundation pit, of the Larsen steel plate piles; the cast-in-place pile is abutted against one side, facing away from the Larsen steel sheet pile, of the connecting cross beam.
Further, the connecting beam is H-shaped steel, and comprises two parallel opposite side plates and two vertical connecting plates of the side plates, wherein one of the side plates is abutted to the side surface of the Larsen steel plate pile, the other side plate is abutted to the cast-in-place pile, and the bottoms of the side plates are welded with the bracket.
Furthermore, the connecting beam is formed by welding a plurality of H-shaped steel, and each H-shaped steel is at least welded with two bracket brackets.
Further, the quantity of bracket is a plurality of, and is a plurality of bracket interval sets up, adjacent two bracket interval is 4 meters.
Further, the Larsen steel sheet pile is vertically arranged.
Further, the cast-in-place pile is a reinforced concrete bored cast-in-place pile.
Further, the connecting beam is horizontally arranged.
Furthermore, the Larsen steel sheet pile and the cast-in-place pile both penetrate through a quicksand layer and are rooted in a bearing layer.
Further, the bracket is arranged close to the top of the Larsen steel sheet pile.
Due to the adoption of the technical scheme, the utility model discloses following beneficial effect has:
the utility model discloses a constitute by larsen steel sheet pile, bored concrete pile, connecting beam, bracket and strut integrated configuration for this deep basal pit strut integrated configuration possesses larsen steel sheet pile's the anti drift sand and the advantage of campshed high strength simultaneously, in effective anti drift sand, has sufficient intensity and does not influence the use of foundation ditch inner space, and the structure atress is even, and the wholeness is good, specially adapted drift sand district. In addition, adopt the integrated configuration of bracket and H shaped steel, not only can improve the wholeness of strut integrated configuration, its simple structure moreover, during the construction connect the crossbeam only with bracket connection fixed, with forest steel sheet pile, bored concrete pile hug closely can, need not to connect for its construction is more convenient.
Drawings
Fig. 1 is a schematic structural view of a deep foundation pit supporting combination structure according to a preferred embodiment of the present invention.
Fig. 2 is a schematic right-view structural diagram of the deep foundation pit supporting combination structure shown in fig. 1.
Description of the main elements
100-deep foundation pit supporting and protecting combined structure, 2-Larsen steel plate pile, 4-bracket, 6-connecting beam, 61-side plate, 63-connecting plate and 8-cast-in-place pile.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1 and 2, a preferred embodiment of the present invention provides a deep foundation pit supporting composite structure 100 for quicksand areas, which includes larsen steel sheet piles 2, bracket brackets 4, connecting beams 6 and cast-in-place piles 8. The bottom of the Larsen steel plate pile 2 and the bottom of the cast-in-place pile 8 are both driven into soil, and the outer side of the Larsen steel plate pile 2 is abutted against the inner side wall of the foundation pit and used for preventing quicksand outside the foundation pit from flowing into the foundation pit; the bracket 4 is welded on the inner side of the Larsen steel plate pile 2, namely welded on the side surface of the Larsen steel plate pile 2, which is opposite to the inner side wall of the foundation pit; the connecting cross beam 6 is supported on the top surface of the bracket 4 and is welded and fixed with the bracket 4, and the connecting cross beam 6 is abutted against the side surface of the Larsen steel sheet pile 2, which is back to the inner side wall of the foundation pit; the cast-in-place pile 8 is abutted against one side of the connecting cross beam 6, which faces away from the Larsen steel sheet pile 2.
In the present embodiment, the larsen steel sheet pile 2 and the cast-in-place pile 8 both penetrate through the quicksand layer and are rooted in the bearing layer, so that the larsen steel sheet pile 2 and the cast-in-place pile 8 are firmly fixed. Preferably, the Larsen steel sheet pile 2 is vertically arranged, and the cast-in-place pile 8 is a reinforced concrete bored cast-in-place pile, so that the strength of the cast-in-place pile is better; adopt bored concrete pile 8 can ensure that bored concrete pile 8 provides sufficient support for Larsen steel sheet pile 2, and be applicable to the construction in quicksand district. The number of the bracket brackets 4 is multiple, the bracket brackets 4 are arranged at intervals and are positioned on the same horizontal plane, and the bracket brackets are arranged close to the top of the Larsen steel sheet pile 2; adjacent two the preferred 4 meters of bracket 4 interval, adjacent two can set up a bored concrete pile 8 between the bracket 4 to make deep basal pit support integrated configuration 100's atress more even, the wholeness is better.
In the present embodiment, the connecting beam 6 is horizontally disposed. Connecting beam 6 is H shaped steel, and it includes that two parallels are relative curb plate 61 and connect two perpendicularly the connecting plate 63 of curb plate 61, one of them curb plate 61 with the side of Larsen steel sheet pile 2 foundation ditch inside wall dorsad supports and leans on, another curb plate 61 with bored concrete pile 8 supports and leans on, two the bottom of curb plate 61 all with bracket 4 welds. Through this setting can make the intensity of connecting beam 6 better, and can increase its and Larsen steel sheet pile 2 and bored concrete pile 8's lifting surface. In the present embodiment, the connecting beam 6 is one piece of H-shaped steel. It is understood that in other embodiments, the length of the connecting beam 6 may be set according to the size of the foundation pit, and when the length of the connecting beam 6 is large, the connecting beam 6 may be formed by welding a plurality of H-shaped steels, and each H-shaped steel is welded with at least two bracket brackets 4.
When the deep foundation pit supporting combined structure 100 is constructed, the method mainly comprises the following steps:
s1: driving the Larsen steel plate pile 2 into soil by a vibration hammer by adopting a screen type construction method, wherein the Larsen steel plate pile 2 is required to be kept vertical and horizontal to form a linear shape in the hammering process;
s2: welding the bracket 4 on the side surface of the Larsen steel plate pile 2 back to the inner side wall of the foundation pit;
s3: abutting the connecting cross beam 6 against the side face of the Larsen steel plate pile 2, which is back to the inner side wall of the foundation pit, and welding the connecting cross beam with the top face of the bracket 4;
s4: the bottom of the cast-in-place pile 8 is driven into the soil, and the side of the cast-in-place pile 8 abuts against the side of the connecting beam 6 facing away from the inner side wall of the foundation pit.
The deep foundation pit supporting and combining structure 100 for the quicksand section comprises Larsen steel plate piles 2, bracket brackets 4, connecting cross beams 6 and filling piles 8, wherein the Larsen steel plate piles 2 are used for blocking inflow of quicksand outside a foundation pit, the bracket brackets 4 and the connecting cross beams 6 are used for strengthening integrity of the Larsen steel plate piles 2, the filling piles 8 are used for providing lateral supporting force for the Larsen steel plate piles 2 and are arranged close to the inner sides of the Larsen steel plate piles 2, and excessive space in the foundation pit cannot be occupied, so that the deep foundation pit supporting and combining structure 100 combines advantages of row piles of the Larsen steel plate piles 2 with each other, the structure is uniform in stress, the integrity is good, the structure is simple, quicksand resistance is guaranteed, the utilization rate of the inner space of the foundation pit is improved to the greatest extent, consumable materials of the supporting and combining structure are reduced, and the deep foundation pit supporting and combining structure is particularly.
The above description is for the detailed description of the preferred possible embodiments of the present invention, but the embodiments are not intended to limit the scope of the present invention, and all equivalent changes or modifications accomplished under the technical spirit suggested by the present invention should fall within the scope of the present invention.
Claims (9)
1. A deep foundation pit supporting and protecting combined structure for a quicksand section is characterized by comprising Larsen steel plate piles, bracket brackets, connecting beams and filling piles, wherein the bottoms of the Larsen steel plate piles and the bottoms of the filling piles are all driven into soil, the bracket brackets are welded on the inner sides of the Larsen steel plate piles, the connecting beams are supported on the top surfaces of the bracket brackets and are fixedly welded with the bracket brackets, and the connecting beams are abutted against the side surfaces, facing away from the inner wall of a foundation pit, of the Larsen steel plate piles; the cast-in-place pile is abutted against one side, facing away from the Larsen steel sheet pile, of the connecting cross beam.
2. A deep foundation pit supporting combination structure for quicksand sections as claimed in claim 1, wherein the connecting beam is H-shaped steel and comprises two parallel opposite side plates and a connecting plate for vertically connecting the two side plates, one of the side plates abuts against the side face of the larsen steel sheet pile, the other side plate abuts against the cast-in-place pile, and the bottoms of the two side plates are welded to the bracket.
3. A deep foundation pit supporting composite structure for quicksand sections as claimed in claim 2, wherein said connecting beam is formed by welding a plurality of H-section steels, each H-section steel being welded to at least two of said bracket brackets.
4. A deep foundation pit supporting combination structure for drift sand areas as claimed in claim 1, wherein the number of bracket brackets is multiple, the bracket brackets are arranged at intervals, and the distance between two adjacent bracket brackets is 4 m.
5. A deep foundation pit bracing assembly for quicksand sections as claimed in claim 1 wherein the larsen steel sheet piles are arranged vertically.
6. A deep foundation pit supporting composite structure for quicksand sections as claimed in claim 1, wherein said cast-in-place pile is a reinforced concrete bored pile.
7. A deep foundation pit supporting assembly structure for quicksand sections as claimed in claim 1 wherein said connecting beam is horizontally disposed.
8. A deep foundation pit supporting composite structure for quicksand sections as claimed in claim 1, wherein said larsen steel sheet pile and said cast-in-place pile both penetrate quicksand layers and are rooted in bearing layers.
9. A deep foundation pit bracing assembly for quicksand sections as claimed in claim 1 wherein the bracket brackets are located near the top of the larsen steel sheet piles.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922215499.9U CN211312543U (en) | 2019-12-11 | 2019-12-11 | Deep foundation pit supporting combined structure for quicksand section |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201922215499.9U CN211312543U (en) | 2019-12-11 | 2019-12-11 | Deep foundation pit supporting combined structure for quicksand section |
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| CN211312543U true CN211312543U (en) | 2020-08-21 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111705809A (en) * | 2020-06-18 | 2020-09-25 | 深圳市蛇口招商港湾工程有限公司 | Deep foundation pit construction structure and deep foundation pit construction method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111705809A (en) * | 2020-06-18 | 2020-09-25 | 深圳市蛇口招商港湾工程有限公司 | Deep foundation pit construction structure and deep foundation pit construction method |
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