CN222413052U - Pipe jacking starting well foundation pit support structure - Google Patents
Pipe jacking starting well foundation pit support structure Download PDFInfo
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- CN222413052U CN222413052U CN202421224391.0U CN202421224391U CN222413052U CN 222413052 U CN222413052 U CN 222413052U CN 202421224391 U CN202421224391 U CN 202421224391U CN 222413052 U CN222413052 U CN 222413052U
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Abstract
本实用新型涉及地下工程施工技术领域，尤其是涉及一种顶管始发井基坑支护结构。包括：多个预制桩件、多个预制板件、冠梁和内支撑部，多个预制桩件沿基坑边界插入至基坑的底部，多个预制板件沿基坑深度方向设置，且每个预制板件均安装在顶管始发一侧基坑壁的两个预制桩件之间，冠梁设置于多个预制桩件的顶部，基坑内部的预制桩件通过内支撑部连接；预制板件设置有预留孔洞，注浆锚杆通过预留孔洞插入基坑土体；预制板件包括靠近顶管的第一预制板和第二预制板，第一预制板和第二预制板预留有顶管外轮廓，顶管外轮廓内的土体插设有玻璃纤维锚杆。本实用新型避免了破除预制桩件对土体造成扰动甚至基坑塌方的风险，保证了施工安全，提高了施工效率。
The utility model relates to the technical field of underground engineering construction, and in particular to a foundation pit support structure for a jacking starting well. It comprises: a plurality of prefabricated piles, a plurality of prefabricated panels, a crown beam and an inner support part, wherein the plurality of prefabricated piles are inserted to the bottom of the foundation pit along the boundary of the foundation pit, the plurality of prefabricated panels are arranged along the depth direction of the foundation pit, and each prefabricated panel is installed between two prefabricated piles on the foundation pit wall on the starting side of the jacking pipe, the crown beam is arranged on the top of the plurality of prefabricated piles, and the prefabricated piles inside the foundation pit are connected through the inner support part; the prefabricated panels are provided with reserved holes, and the grouting anchor rods are inserted into the foundation pit soil through the reserved holes; the prefabricated panels include a first prefabricated panel and a second prefabricated panel close to the jacking pipe, the first prefabricated panel and the second prefabricated panel are reserved with the outer contour of the jacking pipe, and the soil inside the outer contour of the jacking pipe is inserted with a glass fiber anchor rod. The utility model avoids the risk of disturbing the soil or even collapse of the foundation pit caused by breaking the prefabricated piles, ensures construction safety, and improves construction efficiency.
Description
Technical Field
The utility model relates to the technical field of underground engineering construction, in particular to a foundation pit supporting structure of a pipe-jacking originating well.
Background
The pipe jacking construction engineering of the non-excavation technology is often used as an important component for paving urban pipelines, and the foundation pit support of an originating well is related to the stability of the foundation pit and the construction safety of the site. Precast piles are usually used as important supporting structures of foundation pits of originating wells, however, precast piles close to one side of a jacking pipe before the jacking pipe is started after the foundation pit is constructed are broken, the foundation pit supporting structures can be damaged in the construction process, disturbance can be caused to soil, and the risk of instability of the foundation pit is increased. In addition, the construction cost and the construction period of the precast pile are increased due to the fact that the precast pile is broken.
Disclosure of utility model
The utility model aims to provide a foundation pit supporting structure of a pipe-jacking starting well, which aims to solve the problems that after the construction of the existing foundation pit is finished, precast piles on one side of the pipe-jacking adjacent to the pipe-jacking before the starting are broken, the foundation pit supporting structure is damaged, the soil body is disturbed, the construction cost is increased and the construction period is prolonged.
In order to solve the technical problems, the technical scheme provided by the utility model is as follows:
The foundation pit supporting structure of the pipe-jacking starting well comprises a plurality of precast pile pieces, a plurality of precast plate pieces, a crown beam and an inner supporting part, wherein the precast pile pieces are inserted into the bottom of a foundation pit along the boundary of the foundation pit, the precast plate pieces are arranged along the depth direction of the foundation pit, each precast plate piece is arranged between two precast pile pieces of the foundation pit wall at the pipe-jacking starting side, the crown beam is arranged at the top of the precast pile pieces, and the precast pile pieces in the foundation pit are connected through the inner supporting part;
The precast slab is provided with a reserved hole, and the grouting anchor rod is inserted into the soil body of the foundation pit through the reserved hole;
the prefabricated plate comprises a first prefabricated plate and a second prefabricated plate which are close to the jacking pipe, the first prefabricated plate and the second prefabricated plate are reserved with the outer contour of the jacking pipe, and a glass fiber anchor rod is inserted into soil in the outer contour of the jacking pipe.
Furthermore, the width of the prefabricated plate is larger than the diameter of the jacking pipe, and the height of the prefabricated plate is the depth of each excavation of the foundation pit.
Furthermore, a steel block is arranged on one side, connected with the prefabricated pile piece, of the prefabricated plate piece, and the steel block is used for welding the fixing groove.
Further, the fixing groove is composed of two vertical steel plates and a horizontal steel plate located between the two vertical steel plates, and the fixing groove is used for fixing the prefabricated plate.
Further, the diameter of the preformed hole is larger than the diameter of the grouting anchor rod.
Still further, the grouting anchor rod and the reserved hole are provided with a hole therebetween, and the hole is blocked by a rubber plug or an anchoring agent.
Still further, slip casting stock is close to foundation ditch one side and is equipped with gasket and nut, the gasket paste is located the outside of prefabricated plate, the nut paste is located the outside of gasket.
Furthermore, the grouting anchor rod is inserted into undisturbed foundation pit soil body and grouting treatment is carried out.
Furthermore, the glass fiber anchor rod is inserted into soil in the jacking pipe range and grouting treatment is carried out.
Further, the inner support part comprises parallel inner supports attached to the precast pile pieces and diagonal braces connected with the parallel inner supports.
The utility model has at least the following beneficial effects:
The utility model provides a foundation pit supporting structure of a pipe-jacking starting well, which comprises a plurality of precast pile pieces, a plurality of precast plate pieces, a crown beam and an inner supporting part, wherein the precast pile pieces are inserted into the bottom of a foundation pit along the boundary of the foundation pit, the precast plate pieces are arranged along the depth direction of the foundation pit, each precast plate piece is arranged between two precast pile pieces on the wall of the foundation pit on one side of pipe-jacking starting, the crown beam is arranged at the top of the precast pile pieces, the precast pile pieces in the foundation pit are connected through the inner supporting part, the precast plate pieces are provided with reserved holes, grouting anchors are inserted into soil bodies of the foundation pit through the reserved holes, the precast plate pieces comprise a first precast plate and a second precast plate which are close to the foundation pit, the first precast plate and the second precast plate are reserved with outer contours, and the soil bodies in the outer contours are inserted with glass fiber anchors.
The foundation pit wall on one side of the jacking pipe adopts a plurality of precast pile pieces, a plurality of precast plates, a crown beam, an inner supporting part, and a grouting anchor rod and a glass fiber anchor rod which are correspondingly arranged, so that the foundation pit supporting structure of the jacking pipe starting well is formed together, the foundation pit supporting structure can be prevented from being broken before the jacking pipe is started, and disturbance to soil caused by broken construction is avoided. The grouting anchor rod and the glass fiber anchor rod can improve soil intensity on one hand, and on the other hand, the prefabricated plate and undisturbed soil are connected to form an integral supporting structure, so that stability of foundation pit supporting is enhanced, and construction safety of a pit of a jacking pipe originating well is guaranteed. In addition, the method has strong operability, improves the convenience of foundation pit supporting construction in a prefabricated plate supporting mode, shortens the construction period, improves the construction efficiency and reduces the construction cost.
In order to make the above objects, features and advantages of the present utility model more comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the related art, the drawings that are required to be used in the description of the embodiments or the related art will be briefly described, and it is apparent that the drawings in the description below are some embodiments of the present utility model, and other drawings may be obtained according to the drawings without inventive effort for those skilled in the art.
FIG. 1 is a front view of a foundation pit supporting structure of a pipe-jacking initiation well according to an embodiment of the present utility model;
FIG. 2 is an enlarged view of a portion of FIG. 1 at A;
FIG. 3 is a top view of a foundation pit supporting structure of a pipe-jacking initiation well according to an embodiment of the present utility model;
Fig. 4 is a schematic diagram of connection between a grouting anchor rod, a prefabricated plate and a prefabricated pile member according to an embodiment of the present utility model.
Icon:
100-precast pile pieces, 110-steel blocks, 120-vertical steel plates, 130-horizontal steel plates, 200-crown beams, 300-inner supporting parts, 310-parallel inner supporting parts, 320-diagonal bracing, 400-precast plate pieces, 410-first precast plates, 420-second precast plates, 430-top pipe outer contours, 500-grouting anchor rods, 510-gaskets, 520-nuts and 600-glass fiber anchor rods.
Detailed Description
The following description of the embodiments of the present utility model will be made apparent and fully in view of the accompanying drawings, in which some, but not all embodiments of the utility model are shown. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further definition or explanation thereof is necessary in the following figures.
In the description of the present utility model, it should be noted that the directions or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Physical quantities in the formulas, unless otherwise noted, are understood to be basic quantities of basic units of the international system of units, or derived quantities derived from the basic quantities by mathematical operations such as multiplication, division, differentiation, or integration.
Furthermore, the terms "horizontal," "vertical," "overhang," and the like do not denote a requirement that the component be absolutely horizontal or overhang, but rather may be slightly inclined. As "horizontal" merely means that its direction is more horizontal than "vertical", and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, integrally connected, mechanically connected, electrically connected, directly connected, indirectly connected through an intermediary, or in communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.
Some embodiments of the present utility model are described in detail below with reference to the accompanying drawings. The embodiments described below and features of the embodiments may be combined with each other without conflict.
Example 1
Precast piles are usually used as important supporting structures of foundation pits of originating wells, however, precast piles close to one side of a jacking pipe before the jacking pipe is started after the foundation pit is constructed are broken, the foundation pit supporting structures can be damaged in the construction process, disturbance can be caused to soil, and the risk of instability of the foundation pit is increased. In addition, the construction cost and the construction period of the precast pile are increased due to the fact that the precast pile is broken.
In view of this, the embodiment of the utility model provides a foundation pit supporting structure of a pipe-jacking originating well, which comprises a plurality of precast pile members 100, a plurality of precast slabs 400, a crown beam 200 and an inner supporting part 300, wherein the precast pile members 100 are inserted into the bottom of a foundation pit along the boundary of the foundation pit, the precast slabs 400 are arranged along the depth direction of the foundation pit, each precast slab 400 is installed between two precast pile members 100 on the wall of the foundation pit on one side of pipe-jacking originating well, the crown beam 200 is arranged on the top of the precast pile members 100, the precast pile members 100 in the foundation pit are connected through the inner supporting part 300, the precast slabs 400 are provided with reserved holes, a grouting anchor 500 is inserted into a soil body of the foundation pit through the reserved holes, the precast slabs 400 comprise a first precast slab 410 and a second precast slab 420 which are close to the foundation pit, the first precast slab 410 and the second precast slab 420 are reserved with a pipe-jacking outer contour 430, and the soil body in the pipe-jacking outer contour 430 is inserted with a glass anchor 600.
The foundation pit wall on one side of the jacking pipe adopts a plurality of precast pile pieces 100, a plurality of precast plate pieces 400, a crown beam 200 and an inner supporting part 300, and a grouting anchor rod 500 and a glass fiber anchor rod 600 which are correspondingly arranged, so that the foundation pit supporting structure of the jacking pipe originating well is formed together, the foundation pit supporting structure can be prevented from being broken before the jacking pipe is originated, and the disturbance of broken construction to soil is avoided. The grouting anchor rod 500 and the glass fiber anchor rod 600 can improve the soil intensity on one hand, and on the other hand, the prefabricated plate 400 and the undisturbed soil are connected to form an integral supporting structure, so that the stability of foundation pit supporting is enhanced, and the construction safety of the foundation pit of the push pipe originating well is ensured. In addition, the method has strong operability, improves the convenience of foundation pit supporting construction in a mode of prefabricating the plate 400 for supporting, shortens the construction period, improves the construction efficiency and reduces the construction cost.
In an alternative manner of this embodiment, the width of the prefabricated panel 400 is larger than the diameter of the jacking pipe, and the height of the prefabricated panel 400 is the depth of each excavation of the foundation pit.
Referring to fig. 3, the top pipe extends upward in fig. 3, and the width of the prefabricated plate 400 is larger than the diameter of the top pipe, so that a foundation pit supporting structure is formed around the top pipe. Referring to fig. 1, since the foundation pit needs to be excavated multiple times, the height of the prefabricated panel 400 is the depth of each excavation of the foundation pit.
In an alternative mode of the present embodiment, a steel block 110 is provided at a side of the precast pile member 100 connected to the precast slab 400, and the steel block 110 is used for welding a fixing groove.
Further, the fixing groove is composed of two vertical steel plates 120 and one horizontal steel plate 130 located between the two vertical steel plates 120, and is used for fixing the prefabricated panel 400.
Referring to fig. 2, two vertical steel plates 120 and one horizontal steel plate 130 together form a fixing groove, and the fixing groove can fix the prefabricated plate 400, so that the prefabricated plate 400 is effectively connected and fixed with the prefabricated pile 100, and the stability of the foundation pit supporting structure of the pipe-jacking originating well is enhanced.
In an alternative to this embodiment, the diameter of the preformed hole is greater than the diameter of the grouting bolt 500.
Further, there are voids between the grouting bolt 500 and the reserved hole, and the voids are blocked by rubber plugs or anchoring agents.
Referring to fig. 4, a margin is left between the reserved hole and the grouting anchor 500, and a hole is formed between the reserved hole and the grouting anchor 500, and the hole can be blocked by a rubber plug or an anchoring agent, so that the grouting anchor 500 is stably inserted into a foundation pit soil body through the reserved hole.
In an alternative manner of this embodiment, a spacer 510 and a nut 520 are disposed on the side of the grouting anchor 500 close to the foundation pit, the spacer 510 is attached to the outer side of the prefabricated plate 400, and the nut 520 is attached to the outer side of the spacer 510.
Referring to fig. 4, in order to enhance the connection effect between the grouting bolt 500 and the prefabricated panel 400, a spacer 510 and a nut 520 are disposed on the side of the grouting bolt 500 close to the foundation pit, so that the grouting bolt 500 is connected with the prefabricated panel 400 more stably and firmly.
In an alternative mode of this embodiment, the grouting anchor 500 is inserted into the undisturbed foundation pit soil body and grouting treatment is performed, and the glass fiber anchor 600 is inserted into the soil body within the jacking pipe range and grouting treatment is performed.
Referring to fig. 1 and 4, the grouting anchor 500 and the glass fiber anchor 600 are inserted into the corresponding foundation pit soil body and grouting treatment is required to ensure the stability of the foundation pit supporting structure.
In an alternative form of the present embodiment, the inner support 300 includes parallel inner supports 310 fitted to the precast pile members 100 and diagonal braces 320 connected to the parallel inner supports 310.
Referring to fig. 3, parallel inner struts 310 are disposed circumferentially closely to the precast pile member 100, and diagonal struts 320 are connected between the parallel inner struts 310 at adjacent sides. The arrangement of the parallel inner support 310 and the diagonal support 320 enhances the supporting effect of the inner support 300 and enhances the supporting stability of the foundation pit supporting structure of the pipe-jacking originating well.
The construction process of the foundation pit supporting structure of the pipe-jacking originating well in this embodiment is as follows:
Firstly, positioning and lofting a plurality of precast pile pieces 100 in a region to be constructed, inserting and driving precast pile pieces 100 along the foundation pit boundary of a jacking pipe originating well, and constructing a crown beam 200 after the precast pile pieces 100 are constructed. Then excavating soil in the foundation pit, installing a precast slab 400 every time when excavating one layer, and inserting a grouting anchor rod 500 into a reserved hole of the precast slab 400 after the precast slab 400 is installed. And (3) constructing the inner support part 300 when the foundation pit is excavated to the middle part, installing the first precast slab 410 and the second precast slab 420 when the foundation pit is excavated to the jacking pipe range, inserting a glass fiber anchor rod 600 into the soil body in the jacking pipe range, and finally constructing the bottom of the foundation pit. After the whole construction is completed, the precast pile 100, the crown beam 200, the inner support 300, the precast slab 400, the grouting anchor 500 and the glass fiber anchor 600 form a foundation pit supporting structure of the pipe jacking initiation well.
In the embodiment, the precast pile piece 100 on one side of the jacking pipe is replaced by the precast plate 400, so that the risk of disturbance to soil or even collapse of a foundation pit caused by the precast pile piece 100 in the jacking pipe construction process is avoided, the construction safety is ensured, and the construction efficiency is improved.
It should be noted that the above embodiments are merely for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present utility model.
Claims (10)
1. The foundation pit supporting structure of the pipe-jacking originating well is characterized by comprising a plurality of precast pile pieces, a plurality of precast plate pieces, a crown beam and an inner supporting part, wherein the precast pile pieces are inserted into the bottom of a foundation pit along the boundary of the foundation pit, the precast plate pieces are arranged along the depth direction of the foundation pit, each precast plate piece is arranged between two precast pile pieces of the foundation pit wall at the originating side of the pipe-jacking, the crown beam is arranged at the top of the precast pile pieces, and the precast pile pieces in the foundation pit are connected through the inner supporting part;
The precast slab is provided with a reserved hole, and the grouting anchor rod is inserted into the soil body of the foundation pit through the reserved hole;
the prefabricated plate comprises a first prefabricated plate and a second prefabricated plate which are close to the jacking pipe, the first prefabricated plate and the second prefabricated plate are reserved with the outer contour of the jacking pipe, and a glass fiber anchor rod is inserted into soil in the outer contour of the jacking pipe.
2. The foundation pit supporting structure of the pipe-jacking initiation well according to claim 1, wherein,
The width of prefabricated plate is greater than the pipe jacking diameter, the height of prefabricated plate is the degree of depth of excavation at every turn of foundation ditch.
3. The foundation pit supporting structure of the pipe-jacking initiation well according to claim 1, wherein,
One side of the precast pile piece, which is connected with the precast plate, is provided with a steel block, and the steel block is used for welding the fixed groove.
4. The foundation pit supporting structure of the pipe-jacking initiation well according to claim 3, wherein,
The fixed slot comprises two vertical steel plates and a horizontal steel plate positioned between the two vertical steel plates, and the fixed slot is used for fixing the prefabricated plate.
5. The foundation pit supporting structure of the pipe-jacking initiation well according to claim 1, wherein,
The diameter of the reserved hole is larger than that of the grouting anchor rod.
6. The foundation pit supporting structure of the pipe-jacking initiation well of claim 5, wherein,
And a hole is formed between the grouting anchor rod and the reserved hole, and the hole is blocked by a rubber plug or an anchoring agent.
7. The foundation pit supporting structure of the pipe-jacking initiation well according to claim 1, wherein,
The grouting anchor rod is provided with a gasket and a nut on one side close to the foundation pit, the gasket is attached to the outer side of the prefabricated plate, and the nut is attached to the outer side of the gasket.
8. The foundation pit supporting structure of the pipe-jacking initiation well of claim 7, wherein,
And the grouting anchor rod is inserted into undisturbed foundation pit soil body and grouting treatment is carried out.
9. The foundation pit supporting structure of the pipe-jacking initiation well according to claim 1, wherein,
And the glass fiber anchor rod is inserted into the soil body in the jacking pipe range and grouting treatment is carried out.
10. The foundation pit supporting structure of the pipe-jacking initiation well according to claim 1, wherein,
The inner support part comprises parallel inner supports attached to the precast pile pieces and diagonal braces connected with the parallel inner supports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421224391.0U CN222413052U (en) | 2024-05-31 | 2024-05-31 | Pipe jacking starting well foundation pit support structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202421224391.0U CN222413052U (en) | 2024-05-31 | 2024-05-31 | Pipe jacking starting well foundation pit support structure |
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| Publication Number | Publication Date |
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| CN222413052U true CN222413052U (en) | 2025-01-28 |
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| CN202421224391.0U Active CN222413052U (en) | 2024-05-31 | 2024-05-31 | Pipe jacking starting well foundation pit support structure |
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| Country | Link |
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| CN (1) | CN222413052U (en) |
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