CN213836667U - Foundation pit engineering precast concrete non-primary support system - Google Patents
Foundation pit engineering precast concrete non-primary support system Download PDFInfo
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- CN213836667U CN213836667U CN202022102523.0U CN202022102523U CN213836667U CN 213836667 U CN213836667 U CN 213836667U CN 202022102523 U CN202022102523 U CN 202022102523U CN 213836667 U CN213836667 U CN 213836667U
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Abstract
The utility model belongs to the technical field of foundation pit engineering, in particular to a precast concrete non-primary support system for foundation pit engineering, which comprises a precast concrete support, a precast concrete waist beam and a support structure; the inner side of the enclosure structure is provided with a precast concrete waist beam, the precast concrete waist beam is supported on a steel bracket, and the steel bracket is fixedly connected with the enclosure structure; two ends of the precast concrete support are respectively connected with precast concrete waist beams on two sides of the precast concrete support through connecting joints; the precast concrete wale on one side of the precast concrete support is propped against the envelope structure, and the precast concrete wale on the other side of the precast concrete support is tightly propped against the envelope structure through the steel plate wedge and is poured with concrete grouting material. The utility model discloses not only can adjust construction error and installation error, make the both ends top of precast concrete support tightly on envelope, guarantee the foundation ditch security, and the concrete grouting material later stage of pouring chisels out the convenience, realizes the repeated recycle of precast concrete component.
Description
Technical Field
The utility model belongs to the technical field of foundation ditch engineering, concretely relates to non-first support system of foundation ditch engineering precast concrete.
Background
The supporting type retaining structure mainly comprises a retaining component and a support, wherein the retaining component is most commonly a cast-in-situ bored pile, an underground continuous wall and the like. The supporting type retaining structure is definite in stress, relatively mature in calculation method and engineering practice, suitable for deep foundation pits of various geological conditions and most reliable in supporting structure form at present. At present, a first support in a support type supporting and retaining structure is supported by reinforced concrete mostly, the support and a crown beam form a whole, deformation resistance is high, and integral damage caused by skirting at the lower part of a foundation pit can be avoided. The first reinforced concrete support is constructed by adopting cast-in-place concrete mostly, the construction process is complex, the speed is slow, the concrete support is a temporary structure, and the concrete support needs to be chiseled out and cannot be recycled at the later stage, so that a large amount of redundant waste building rubbish is formed, resources are wasted, and the environment is polluted; generally, when the soil condition is good, the second and the following supports can adopt steel supports, but when the soil condition is poor, a plurality of concrete supports also need to be designed, but the problems exist in the first concrete support.
Therefore, there is a need to design a new precast concrete non-primary support system for foundation pit engineering to overcome the above problems.
Disclosure of Invention
In order to overcome the not enough of above-mentioned prior art existence, the utility model aims at providing a foundation ditch engineering precast concrete non-first support system can satisfy the operation requirement of foundation ditch, can guarantee quick convenient construction again, and recoverable reuse in later stage.
In order to achieve the purpose, the technical scheme of the utility model is a precast concrete non-first-path supporting system for foundation pit engineering, which comprises a precast concrete support, a precast concrete waist beam and a support structure; the inner side of the enclosure structure is provided with a precast concrete waist beam, the precast concrete waist beam is supported on a steel bracket, and the steel bracket is fixedly connected with the enclosure structure; two ends of the precast concrete support are respectively connected with precast concrete waist beams on two sides of the precast concrete support through connecting joints; the precast concrete wale on one side of the precast concrete support is propped against the enclosure structure, and the precast concrete wale on the other side of the precast concrete support is tightly propped against the enclosure structure through a steel plate wedge and poured with concrete grouting material.
Furthermore, an embedded steel plate is embedded in the inner wall of the enclosure structure, one side of the embedded steel plate is connected with a plurality of anchor bars, and the other side of the embedded steel plate is tightly propped against the precast concrete waist beam through a steel plate wedge; the anchor bars are embedded in the envelope structure in advance.
Further, the steel bracket comprises a supporting steel plate, a connecting steel plate and a stiffening plate; the connecting steel plate is vertically arranged and connected with an embedded part in the enclosure structure; the supporting steel plate is horizontally arranged and connected with the top of the connecting steel plate; the bottom surface of the supporting steel plate is connected with the connecting steel plate through a stiffening plate; the precast concrete wale is supported on the support steel plate.
Furthermore, a plurality of precast concrete supports are arranged in the enclosure structure at intervals along the horizontal direction, and the precast concrete supports are formed by splicing a plurality of sections of precast concrete supports through connecting joints.
Furthermore, the lengths of the multiple sections of precast concrete supports are completely different or not completely the same; and the abutted seams of the adjacent precast concrete supports are not on the same straight line.
Further, the connecting joint comprises two fixing pieces and a connecting piece for connecting the two fixing pieces; the two fixing pieces are respectively fixed at the ends of the two precast concrete members to be connected.
Furthermore, the connecting piece comprises two first steel plates which are oppositely arranged, the two first steel plates are connected through the section steel, and the two first steel plates are respectively connected with the two fixing pieces.
Furthermore, the fixing piece comprises a second steel plate and an embedded bolt; the second steel plate is fixed on the end face of the precast concrete member, and the embedded bolt is embedded in the precast concrete member and penetrates through the second steel plate; the second steel plate is connected with the first steel plate through embedded bolts.
Furthermore, the second steel plate is welded with a shear key, the end part of the precast concrete member is correspondingly provided with a groove, and the shear key is installed in the groove.
Compared with the prior art, the utility model discloses following beneficial effect has:
(1) the utility model discloses a precast concrete supports the precast concrete waist rail of one side wherein and pushes up on envelope, tightly and pour the concrete grout material through the steel sheet wedge between the precast concrete waist rail of one side in addition and the envelope, can adjust construction error and installation error on the one hand, make the both ends of precast concrete support push up tightly on envelope, guarantee foundation ditch construction security, on the other hand cast be plain concrete between precast concrete waist rail and the envelope, so that chisel in the later stage, realize the repeated recycle of precast concrete component, reduce wasting of resources and environmental pollution;
(2) the utility model discloses a bolted connection is all adopted through attach fitting between precast concrete support and the precast concrete waist rail and between the multistage precast concrete support piece, not only the installation with dismantle simple swift, convenient construction can not destroy the precast concrete component moreover dismantling the in-process, make the precast concrete component can reuse.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a plan view of a precast concrete non-primary support system for foundation pit engineering provided by an embodiment of the present invention;
fig. 2 is a cross-sectional view of a precast concrete non-primary support system for foundation pit engineering provided by an embodiment of the present invention;
fig. 3 is a sectional view of a steel corbel of a precast concrete non-primary support system in foundation pit engineering provided by an embodiment of the present invention;
fig. 4 is a plan view of a joint of the precast concrete non-primary support system for foundation pit engineering provided by the embodiment of the present invention;
FIG. 5 is a view A-A of FIG. 4;
FIG. 6 is a view B-B of FIG. 4;
in the figure: 1. prefabricating a concrete support; 11. a first precast concrete support; 12. a second precast concrete support; 2. prefabricating a concrete waist beam; 3. connecting a joint; 31. a first steel plate; 32. a second steel plate; 33. section steel; 34. an X-direction stiffener; 35. a Y-direction stiffener; 36. a shear key; 37. embedding bolts in advance; 4. a steel plate wedge; 5. steel corbels; 51. a support steel plate; 52. connecting steel plates; 53. a stiffening plate; 6. an enclosure structure; 61. pre-burying a steel plate; 62. anchoring ribs; 63. embedding parts; 7. concrete grouting material; 8. a retaining wall.
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 efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
As shown in fig. 1 to fig. 3, the embodiment provides a precast concrete non-primary support system for foundation pit engineering, which includes a precast concrete support 1, a precast concrete wale 2, and a support structure 6; the inner side of the enclosure structure 6 is provided with a precast concrete wale 2, the precast concrete wale 2 is supported on a steel corbel 5, and the steel corbel 5 is fixedly connected with the enclosure structure 6; two ends of the precast concrete support 1 are respectively connected with precast concrete wales 2 at two sides of the precast concrete support through connecting joints 3; the precast concrete wale 2 of one side of the precast concrete support 1 is propped against the enclosure structure 6, and the precast concrete wale 2 of the other side of the precast concrete support 1 is tightly propped against the enclosure structure 6 through the steel plate wedge 4 and is poured with a concrete grouting material 7. In this embodiment, the precast concrete wale 2 of one side of the precast concrete support 1 is supported on the enclosure structure 6, and the precast concrete wale 2 of the other side is tightly supported on the enclosure structure 6 through the steel plate wedge 4 and poured with the concrete grouting material 7, so that the construction error and the installation error can be adjusted, the two ends of the precast concrete support 1 are supported on the enclosure structure 6, the construction safety of a foundation pit is ensured, plain concrete is poured between the precast concrete wale 2 and the enclosure structure 6, and the construction is convenient for later-stage removal, repeated recycling of precast concrete members is realized, and the resource waste and the environmental pollution are reduced.
The precast concrete support 1 in this embodiment may be square or circular; the structure can be solid or hollow.
Furthermore, an embedded steel plate 61 is embedded in the inner wall of the enclosure structure 6, one side of the embedded steel plate 61 is connected with a plurality of anchor bars 62, and the other side of the embedded steel plate 61 is tightly propped against the precast concrete wale 2 through a steel plate wedge 4; the anchor bars 62 are pre-embedded in the envelope 6. As shown in fig. 3, in the embodiment, the embedded steel plate 61 is embedded at a position of the enclosure 6 corresponding to the upper portion of the precast concrete wale 2, so that when the steel plate wedge 4 is inserted between the top of the precast concrete wale 2 and the embedded steel plate 61 to tightly push the precast concrete support 1, the concrete structure of the enclosure 6 is not damaged.
Further, the steel bracket 5 includes a support steel plate 51, a connection steel plate 52 and a stiffening plate 53; the connecting steel plate 52 is vertically arranged and connected with an embedded part 63 in the enclosure structure 6; the supporting steel plate 51 is horizontally arranged and connected with the top of the connecting steel plate 52; the bottom surface of the supporting steel plate 51 is connected with the connecting steel plate 52 through a stiffening plate 53; the precast concrete wale 2 is supported on the support steel plate 51. As shown in fig. 3, the embedded part 63 of the embodiment includes a fixed steel plate fixed on the inner wall of the enclosure 6 and a bolt embedded in the enclosure 6, and one end of the bolt extends out of the enclosure 6 and sequentially penetrates through the fixed steel plate and the connecting steel plate 52 to be fixed by a nut. The steel corbel 5 in the embodiment is a steel structural member, the steel corbel 5 is connected with the embedded part 63 in the enclosure structure through the bolt, the installation and the disassembly are simple and quick, the construction is convenient, the enclosure structure 6 cannot be damaged in the disassembly process, the steel corbel 5 cannot be damaged, and the steel corbel 5 can be recycled.
Furthermore, a plurality of precast concrete supports 1 are arranged in the enclosure structure 6 at intervals along the horizontal direction, and the precast concrete supports 1 are formed by splicing a plurality of sections of precast concrete supports through connecting joints 3. At least one layer of wale is arranged in the enclosure structure 6 at intervals along the height direction of the enclosure structure in the embodiment, each layer of wale is formed by splicing precast concrete wales 2, a plurality of precast concrete supports 1 are supported in each layer of wale, and the precast concrete supports 1 are arranged at intervals along the horizontal direction.
Furthermore, the lengths of the multiple sections of precast concrete supports are completely different or not completely the same; and the abutted seams of the adjacent precast concrete supports are not on the same straight line. In this embodiment, each piece of the multi-section precast concrete supporting member of the precast concrete support is not in the same straight line with each piece of the multi-section precast concrete supporting member of the precast concrete support, so that the safety risk of foundation pit construction is reduced. As a specific embodiment, as shown in fig. 1, the precast concrete supports 1 are formed by splicing a first precast concrete support 11 and a second precast concrete support 12 with different lengths through a connecting joint 3, and the first precast concrete support 11 and the second precast concrete support 12 of the precast concrete supports 1 adjacent in the horizontal direction and the vertical direction are opposite in left and right positions, so that the connecting nodes of the first precast concrete support 11 and the second precast concrete support 12 of the precast concrete supports 1 in the horizontal direction and the vertical direction are not on the same straight line.
Further, the connecting joint 3 comprises two fixing pieces and a connecting piece for connecting the two fixing pieces; the two fixing pieces are respectively fixed at the ends of the two precast concrete members to be connected. In the embodiment, the precast concrete member comprises a precast concrete support 1 and a precast concrete wale 2, wherein the precast concrete support 1 comprises a plurality of sections of precast concrete supporting pieces; the precast concrete wale 2 and the precast concrete support piece of this embodiment all adopt the prefabricated component form, can be in factory batch production, deliver to the scene again and assemble, can improve production efficiency, and the quality is reliable, saves labour, saves the template, can also shorten the time limit for a project, is applicable to in the all kinds of foundation ditch engineering of building.
Furthermore, the connecting member includes two first steel plates 31 disposed opposite to each other, the two first steel plates 31 are connected by a section steel 33, and the two first steel plates 31 are respectively connected with the two fixing members. As shown in fig. 4 to 6, the two first steel plates 31 of the connecting member of the present embodiment are connected by the section steel 33, the section steel 33 may be in various forms such as a rectangular steel pipe, an i-shaped steel pipe, a circular steel pipe, a cross-shaped steel pipe, etc., and the outer wall of the section steel 33 is connected to the first steel plates 31 by the X-direction stiffener plate 34 and the Y-direction stiffener plate 35.
As an embodiment, the fixing member includes a second steel plate 32 and embedded bolts 37; the second steel plate 32 is fixed on the end face of the precast concrete member, and the embedded bolt 37 is embedded in the precast concrete member and penetrates through the second steel plate 32; the second steel plate 32 is connected with the first steel plate 31 through embedded bolts 37. As shown in fig. 4 to 6, a plurality of bolt holes are formed in each of the first steel plate 31 and the second steel plate 32 of this embodiment, a plurality of embedded bolts 37 are embedded in the precast concrete member, the embedded bolts 37 correspond to the bolt holes one to one, and one end of each embedded bolt 37 extends out of the precast concrete member and sequentially passes through the second steel plate 32 and the first steel plate 31 to be fixed by a nut.
As another embodiment, the fixing member includes a plurality of embedded sleeves and bolts, the end of the precast concrete member is embedded with the embedded sleeves, bolt holes are formed in the first steel plate 31 at positions corresponding to the embedded sleeves, and the bolts penetrate the bolt holes in the first steel plate 31 and then are screwed into the embedded sleeves, so that the fixing member is connected with the connecting member.
Among two kinds of embodiments above, the connecting piece is the steel construction spare, and the connecting piece is connected with the pre-buried bolted connection of mounting on the precast concrete component, and not only the installation is simple swift with the dismantlement, and convenient construction neither can destroy precast concrete component in the dismantlement process, also can not destroy the connecting piece, makes precast concrete component and connecting piece all can reuse material saving.
Furthermore, the second steel plate 32 is welded with a shear key 36, and a groove is correspondingly formed at the end of the precast concrete member, and the shear key 36 is installed in the groove. In the embodiment, the shear key 36 is welded on one side of the second steel plate 32 facing the precast concrete member, and the shear key 36 is arranged in the groove at the end part of the precast concrete member, so that the effects of resisting the shear force and limiting the displacement of the end part are achieved; the shear key 36 may be made of various types of steel, such as rectangular steel pipe, i-steel, circular steel pipe, channel steel, angle steel, cross-shaped steel, and may also be made of anchor bars.
The embodiment also provides a construction method of the precast concrete non-primary support system for foundation pit engineering, which comprises the following steps:
1) leveling a field, constructing a fence, moving and modifying pipelines and dredging traffic; then constructing a dewatering well and an enclosure structure 6 (enclosure piles, underground continuous walls and the like), and embedding an embedded part 63 on the enclosure structure 6 when the enclosure structure 6 is constructed; then carrying out foundation pit pre-precipitation to ensure that the water level is 1m below the substrate;
2) after the building envelope 6 reaches the design strength, excavating a foundation pit to a position 0.5m below the first support, and constructing a crown beam and a first concrete support; then excavating the foundation pit to a position 0.5m below the second support;
3) prefabricating a plurality of sections of precast concrete supporting pieces, precast concrete waist beams 2, steel corbels 5 and connecting joints 3 in a factory, and transporting to a construction site;
4) fixedly connecting the steel bracket 5 with the embedded part 63 through bolts;
5) hoisting the precast concrete wales 2, placing the precast concrete wales on the steel corbels 5, and then respectively connecting the precast concrete wales 2 on the two sides with the precast concrete supporting pieces through the connecting joints 3;
6) splicing the precast concrete supporting pieces into a precast concrete support 1 through connecting joints 3 by adopting bolts;
7) the precast concrete wale 2 on one side of the precast concrete support 1 is tightly propped against the enclosure structure 6, a steel plate wedge 4 is inserted between the precast concrete wale 2 on the other side and the enclosure structure 6 to be tightly propped, and the precast concrete wale is poured and grouted through a concrete grouting material 7;
8) the third and fourth supporting construction processes below the second support are the same as the steps 3) -7).
The dismantling sequence of the precast concrete non-primary support system for foundation pit engineering described in this embodiment is as follows:
1) loosening the bolts for connecting the steel corbels 5, and removing the steel corbels 5 below the concrete grouting material 7;
2) chiseling plain concrete grouting material 7 and steel plate wedge 4;
3) and loosening bolts of the connecting joints 3, removing the connecting joints 3 between the precast concrete supports 1 and the precast concrete wales 2 and the connecting joints 3 between the precast concrete support members, and recovering the first precast concrete support members 11, the second precast concrete support members 12, the connecting joints 3 and the steel brackets 5.
The above description is only a preferred embodiment of the present invention, and should not be taken as limiting the invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. The utility model provides a non-first support system of foundation ditch engineering precast concrete which characterized in that: the prefabricated concrete beam comprises a prefabricated concrete support, a prefabricated concrete waist beam and a building envelope; the inner side of the enclosure structure is provided with a precast concrete waist beam, the precast concrete waist beam is supported on a steel bracket, and the steel bracket is fixedly connected with the enclosure structure; two ends of the precast concrete support are respectively connected with precast concrete waist beams on two sides of the precast concrete support through connecting joints; the precast concrete wale on one side of the precast concrete support is propped against the enclosure structure, and the precast concrete wale on the other side of the precast concrete support is tightly propped against the enclosure structure through a steel plate wedge and poured with concrete grouting material.
2. The precast concrete non-primary support system for foundation pit engineering according to claim 1, wherein: an embedded steel plate is also embedded in the inner wall of the enclosure structure, one side of the embedded steel plate is connected with a plurality of anchor bars, and the other side of the embedded steel plate is tightly propped against the precast concrete waist beam through a steel plate wedge; the anchor bars are embedded in the envelope structure in advance.
3. The precast concrete non-primary support system for foundation pit engineering according to claim 1, wherein: the steel bracket comprises a supporting steel plate, a connecting steel plate and a stiffening plate; the connecting steel plate is vertically arranged and connected with an embedded part in the enclosure structure; the supporting steel plate is horizontally arranged and connected with the top of the connecting steel plate; the bottom surface of the supporting steel plate is connected with the connecting steel plate through a stiffening plate; the precast concrete wale is supported on the support steel plate.
4. The precast concrete non-primary support system for foundation pit engineering according to claim 1, wherein: a plurality of precast concrete supports are arranged in the enclosure structure at intervals along the horizontal direction, and the precast concrete supports are formed by splicing a plurality of sections of precast concrete supporting pieces through connecting joints.
5. The precast concrete non-primary support system for foundation pit engineering according to claim 4, wherein: the lengths of the multiple sections of precast concrete supporting pieces are completely different or not completely the same; and the abutted seams of the adjacent precast concrete supports are not on the same straight line.
6. The precast concrete non-primary support system for foundation pit engineering according to claim 1 or 4, wherein: the connecting joint comprises two fixing pieces and a connecting piece for connecting the two fixing pieces; the two fixing pieces are respectively fixed at the ends of the two precast concrete members to be connected.
7. The precast concrete non-primary support system for foundation pit engineering according to claim 6, wherein: the connecting piece comprises two first steel plates which are oppositely arranged, the two first steel plates are connected through profile steel, and the two first steel plates are respectively connected with the two fixing pieces.
8. The precast concrete non-primary support system for foundation pit engineering according to claim 7, wherein: the fixing piece comprises a second steel plate and an embedded bolt; the second steel plate is fixed on the end face of the precast concrete member, and the embedded bolt is embedded in the precast concrete member and penetrates through the second steel plate; the second steel plate is connected with the first steel plate through embedded bolts.
9. The precast concrete non-primary support system for foundation pit engineering according to claim 8, wherein: the second steel plate is welded with a shear key, the end part of the precast concrete member is correspondingly provided with a groove, and the shear key is arranged in the groove.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022102523.0U CN213836667U (en) | 2020-09-23 | 2020-09-23 | Foundation pit engineering precast concrete non-primary support system |
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| CN202022102523.0U CN213836667U (en) | 2020-09-23 | 2020-09-23 | Foundation pit engineering precast concrete non-primary support system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113802568A (en) * | 2021-08-30 | 2021-12-17 | 北京工业大学 | Mould bag concrete-steel plate combined node for connecting steel pipe inner support and foundation pit support structure |
| CN114908768A (en) * | 2022-05-19 | 2022-08-16 | 广东省水利水电第三工程局有限公司 | Precast concrete shoring system for unbalanced foundation pit excavation and construction method thereof |
-
2020
- 2020-09-23 CN CN202022102523.0U patent/CN213836667U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113802568A (en) * | 2021-08-30 | 2021-12-17 | 北京工业大学 | Mould bag concrete-steel plate combined node for connecting steel pipe inner support and foundation pit support structure |
| CN114908768A (en) * | 2022-05-19 | 2022-08-16 | 广东省水利水电第三工程局有限公司 | Precast concrete shoring system for unbalanced foundation pit excavation and construction method thereof |
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