Foundation pit support pile intrusion detection device and detection method thereof

Abstract

The application discloses a device for detecting encroachment of a foundation pit supporting pile and a detection method thereof, and comprises at least two anti-pulling anchoring parts which are arranged at intervals along the circumferential direction of the foundation pit, one end of the anti-pulling anchoring part is anchored to the side wall of the foundation pit, and the other end of the anti-pulling anchoring part extends to the outside of the side wall of the foundation pit; a vertical hanging part is hung on the other end of the anti-pulling anchoring part through a rope; and a weft rope is connected to the warp rope on two adjacent anti-pulling anchoring parts, the weft rope and the warp rope form a reference vertical plane, and the distance between the reference vertical plane and the foundation pit supporting pile is used for judging whether the foundation pit supporting pile encroaches. The application solves the problem of low detection efficiency of the traditional method for detecting the encroachment of the supporting pile in the foundation pit excavation process.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to a device and method for detecting the encroachment of foundation pit support piles. Background Technology

[0002] Currently, during the construction process of foundation pit excavation, when it comes to the construction of support piles (such as bored piles), the issue of determining whether the support piles have encroached on the boundary is a key concern. Existing methods for measuring the boundary of support piles include: using a total station without a prism, and using RTK (Real-time kinematic) point setting within the foundation pit. Using a total station without a prism for observation has low construction safety, is time-consuming and labor-intensive, and requires repeated observations after each excavation section, making the procedure cumbersome and complex. When using the RTK point setting method within the foundation pit, weak or no satellite positioning signals are frequently encountered, and waiting for a normal signal is time-consuming and may lead to inaccurate observations. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, a device and method for detecting the encroachment of foundation pit support piles are provided to solve the problem of low detection efficiency in traditional methods for detecting the encroachment of support piles during foundation pit excavation.

[0004] To achieve the above objectives, a device for detecting the encroachment limit of foundation pit support piles is provided, comprising:

[0005] At least two pull-out anchors are spaced apart along the circumferential direction of the foundation pit. One end of the pull-out anchor is anchored to the side wall of the foundation pit, and the other end of the pull-out anchor extends to the outside of the side wall of the foundation pit.

[0006] A hanging member, which is suspended from the other end of the pull-out anchor by a cable;

[0007] The weft cable is a warp cable connected to two adjacent pull-out anchors. The weft cable and the warp cable form a reference vertical plane. The distance between the reference vertical plane and the foundation pit support pile is used to determine whether the foundation pit support pile encroaches on the limit.

[0008] The pull-out anchor includes: an anchor rod having a first end and a second end opposite to each other, the first end of the anchor rod having an insertion hole, and the middle part of the anchor rod having a through hole communicating with the insertion hole; a fin plate, which is rotatably installed in the through hole; and an insert rod, which is positionally adjustable and inserted into the insertion hole, the insert rod having a pressing block formed on it for pressing the fin plate to extend the fin plate to the outside of the anchor rod, the pressing block being slidably disposed in the through hole;

[0009] A limiting groove is formed on the circumferential surface of the first end of the anchor rod, and the upper end of the warp cable is embedded in the limiting groove.

[0010] Furthermore, one end of the fin is connected to the wall of the perforation via a hinge shaft.

[0011] Furthermore, the thickness of the fin plate gradually increases from one end of the fin plate to the other end of the fin plate. The pressing block abuts against one end of the fin plate. After the insertion rod is adjusted to face the outside of the hole of the insertion hole, the pressing block presses against the other end of the fin plate to make the fin plate extend to the outside of the anchor rod.

[0012] Furthermore, the insertion hole has an internal thread, the insertion rod has an external thread, and the insertion rod is screwed into the insertion hole.

[0013] Furthermore, the number of perforations is at least two, and at least two perforations are equally spaced along the circumference of the anchor rod.

[0014] This invention provides a detection method for an intrusion detection device for foundation pit support piles, comprising the following steps:

[0015] At least two pull-out anchors are anchored in the side wall of the pit, and the at least two pull-out anchors are spaced apart along the circumferential direction of the pit, with the other end of the pull-out anchors extending to the outside of the side wall of the pit.

[0016] The vertical support is suspended by a cable to the other end of the pull-out anchor, so that the at least two pull-out anchors are positioned by the cable on the outer edge of the underground structure;

[0017] The weft cable is connected to the warp cable on two adjacent pull-out anchors, and the weft cable and the warp cable form a reference vertical plane;

[0018] Construct foundation pit support piles, and determine whether the foundation pit support piles encroach on the limit based on the distance between the reference vertical plane and the foundation pit support piles.

[0019] The beneficial effect of this invention is that the device for detecting the encroachment limit of foundation pit support piles, before use, embeds the pull-out anchoring component into the concrete (sprayed anchor surface) to fix it. Then, using a small prism observation method or a prism-free point layout method, the position of the anchor rod's limiting groove is located at the outer edge of the underground structure. The limiting groove is used to fasten the warp cables. The warp cables are connected to the hanging component. The position of the warp cables must be accurately positioned at the edge of the main underground structure so that the hanging component remains at the outer edge of the structure during downward hanging, thus ensuring that the two warp cables are parallel. Finally, the two warp cables can be connected to multiple weft cables to form a reference vertical plane at the outer edge of the main underground structure. If a bored pile is found to exceed the reference vertical plane and enter the foundation pit, it can be determined that the pile has encroached the limit; otherwise, it has not. This is one complete operation. After one operation, it is possible to visually determine whether the support pile (bored pile) corresponding to the current reference vertical plane has encroached the limit. The device for detecting encroachment of foundation pit support piles of the present invention avoids the signal failure problem of using wireless electronic devices, and can quickly and efficiently detect whether foundation pit support piles have encroached on the limit, thereby improving the construction efficiency and speed of foundation pit engineering. Attached Figure Description

[0020] Other features, objects, and advantages of this application will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0021] Figure 1 This is a schematic diagram of the structure of the foundation pit support pile encroachment detection device according to an embodiment of the present invention.

[0022] Figure 2 This is a front view of the device for detecting the encroachment of foundation pit support piles according to an embodiment of the present invention.

[0023] Figure 3 This is a cross-sectional view of the pull-out anchoring component according to an embodiment of the present invention.

[0024] Figure 4 This is a schematic diagram of the finned state in an embodiment of the present invention.

[0025] Figure 5 This is a schematic diagram of the insertion rod according to an embodiment of the present invention.

[0026] Figure 6 This is a cross-sectional view of the insertion rod according to an embodiment of the present invention. Detailed Implementation

[0027] The present application will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the invention are shown in the accompanying drawings.

[0028] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. This application will now be described in detail with reference to the accompanying drawings and embodiments.

[0029] Reference Figures 1 to 6 As shown, the present invention provides a device for detecting the encroachment limit of foundation pit support piles, comprising: an anti-pull-out anchor 1, a hanging component 2, and a weft cable 3.

[0030] The number of pull-out anchors 1 is at least two. The two pull-out anchors 1 are spaced apart along the circumferential direction of the foundation pit.

[0031] One end of the pull-out anchor 1 is anchored to the side wall 4 of the pit, and the other end of the pull-out anchor 1 extends to the outside of the side wall 4 of the pit.

[0032] In this embodiment, the hanging member 2 is a plumb bob. The hanging member 2 is suspended from the other end of the pull-out anchor member 1 by a cable 21.

[0033] The weft cable 3 is connected to the warp cable 21 on two adjacent anti-pull-out anchors 1. The weft cable 3 and the warp cable 21 form a reference vertical plane. The distance between the reference vertical plane and the foundation pit support pile is used to determine whether the foundation pit support pile has encroached on the limit.

[0034] As a preferred embodiment, the pull-out anchor 1 includes: anchor rod 11, wing plate 12, and insert rod 13.

[0035] Anchor rod 11 is elongated. Anchor rod 11 has a first end and a second end. The first end of anchor rod 11 has an insertion hole 111. The second end of anchor rod 11 is conical. A through hole 112 is formed in the middle of anchor rod 11. Through hole 112 connects to insertion hole 111.

[0036] In this embodiment, the perforation is strip-shaped and runs along the axial direction of the anchor rod.

[0037] The fin 12 is rotatably mounted in the perforation 112. The length of the fin is less than the length of the perforation.

[0038] The insertion rod 13 is adjustablely inserted into the insertion hole 111. A pressing block 131 is formed on the insertion rod 13. The pressing block 131 is slidably disposed in the through hole 112.

[0039] The compression block 131 is used to compress the fin 12 so that the fin 12 extends to the outside of the anchor rod 11. After the pull-out anchor is inserted into the cap beam or the sprayed anchor surface between piles of the foundation pit retaining structure, the compression block 131 compresses the fin 12 so that the fin 12 extends to the outside of the anchor rod 11. The fin extends to the outside of the anchor rod and abuts against the hole wall of the insertion hole of the cap beam or the sprayed anchor surface between piles, thereby making the pull-out anchor securely inserted into the cap beam or the sprayed anchor surface between piles.

[0040] See Figure 5 and Figure 6 As shown, a limiting groove 110 is formed on the circumferential surface of the first end of the anchor rod 11. The upper end of the cable 21 is embedded in the limiting groove 110.

[0041] In this embodiment, the fin is elongated, and one end of the fin 12 is connected to the wall of the through hole 112 via a hinge shaft.

[0042] In a preferred embodiment, the thickness of the fin 12 gradually increases from one end of the fin 12 to the other end. The pressing block abuts against one end of the fin 12. After the insertion rod 13 is adjusted to face the outside of the opening of the insertion hole 111, the pressing block presses against the other end of the fin 12 to extend the fin 12 to the outside of the anchor rod 11.

[0043] In a preferred embodiment, the insertion hole 111 has an internal thread. The insertion rod 13 has an external thread. The insertion rod 13 is screwed into the insertion hole 111.

[0044] The number of perforations 112 is at least two. At least two perforations 112 are equally spaced along the circumference of the anchor rod 11.

[0045] This invention provides a detection method for an intrusion detection device for foundation pit support piles, comprising the following steps:

[0046] S1. At least two pull-out anchors 1 are anchored in the pit sidewall 4. The at least two pull-out anchors 1 are spaced apart along the circumferential direction of the pit, and the other end of the pull-out anchors 1 extends to the outside of the pit sidewall 4.

[0047] S2. The vertical support 2 is suspended to the other end of the pull-out anchor 1 by the cable 21, so that at least two pull-out anchors 1 are positioned on the outer edge of the underground structure by the cable 21.

[0048] S3. Connect the weft cable 3 to the warp cable 21 on the two adjacent anti-pull-out anchors 1, so that the weft cable 3 and the warp cable 21 form a reference vertical plane.

[0049] S4. Construct foundation pit support piles, and determine whether the foundation pit support piles encroach on the limit based on the distance between the benchmark vertical plane and the foundation pit support piles.

[0050] This invention relates to a device for detecting the encroachment of foundation pit support piles. Before use, the pull-out anchor is embedded in concrete (sprayed concrete surface) to fix it in place. Then, using a small prism observation method or a prism-free point layout method, the position of the anchor's limiting groove is located at the outer edge of the underground structure. The limiting groove is used to fasten the warp cables. The warp cables are connected to the hanging member. The position of the warp cables must be accurately positioned at the edge of the main underground structure so that the hanging member remains at the outer edge of the structure during downward hanging, thus ensuring that the two warp cables are parallel. Finally, the two warp cables can be connected to multiple weft cables to form a reference vertical plane at the outer edge of the main underground structure. If a bored pile is found to have exceeded the reference vertical plane and entered the foundation pit, it can be determined that the pile has encroached; otherwise, it has not. This constitutes one complete operation. After one operation, it is possible to visually determine whether the support pile (bored pile) corresponding to the current reference vertical plane has encroached.

[0051] Then repeat this operation on another bored pile. By repeating this operation, it is possible to visually determine whether the bored pile has encroached on the limit.

[0052] The present invention provides a device for detecting the encroachment of foundation pit support piles. It is easy to operate, sturdy and durable, and convenient to observe, making it easy to measure whether the cast-in-place piles have encroached on the limit.

[0053] The device for detecting the encroachment of foundation pit support piles of the present invention is low in cost, simple to manufacture, and has a long service life.

[0054] The above description is merely a preferred embodiment of this application and an explanation of the technical principles employed. Those skilled in the art should understand that the scope of the invention involved in this application is not limited to technical solutions formed by specific combinations of the above-described technical features, but should also cover other technical solutions formed by arbitrary combinations of the above-described technical features or their equivalents without departing from the inventive concept. For example, technical solutions formed by substituting the above features with (but not limited to) technical features with similar functions disclosed in this application.

Claims

1. A device for detecting the encroachment limit of foundation pit support piles, characterized in that, include: At least two pull-out anchors are spaced apart along the circumferential direction of the foundation pit. One end of the pull-out anchor is anchored to the side wall of the foundation pit, and the other end of the pull-out anchor extends to the outside of the side wall of the foundation pit. A hanging member, which is suspended from the other end of the pull-out anchor by a cable; The weft cable is a warp cable connected to two adjacent pull-out anchors. The weft cable and the warp cable form a reference vertical plane. The distance between the reference vertical plane and the foundation pit support pile is used to determine whether the foundation pit support pile encroaches on the limit. The pull-out anchor includes: an anchor rod having a first end and a second end opposite to each other, the first end of the anchor rod having an insertion hole, and the middle part of the anchor rod having a through hole communicating with the insertion hole; a fin plate, which is rotatably installed in the through hole; and an insert rod, which is positionally adjustable and inserted into the insertion hole, the insert rod having a pressing block formed on it for pressing the fin plate to extend the fin plate to the outside of the anchor rod, the pressing block being slidably disposed in the through hole; A limiting groove is formed on the circumferential surface of the first end of the anchor rod, and the upper end of the warp cable is embedded in the limiting groove.

2. The device for detecting the encroachment of foundation pit support piles according to claim 1, characterized in that, One end of the fin is connected to the wall of the perforation via a hinge shaft.

3. The device for detecting the encroachment of foundation pit support piles according to claim 2, characterized in that, The thickness of the fin plate gradually increases from one end of the fin plate to the other end of the fin plate. The pressing block abuts against one end of the fin plate. After the insertion rod is adjusted to face the outside of the hole of the insertion hole, the pressing block presses against the other end of the fin plate to make the fin plate extend to the outside of the anchor rod.

4. The device for detecting the encroachment of foundation pit support piles according to claim 1, characterized in that, The insertion hole has an internal thread, the insertion rod has an external thread, and the insertion rod is screwed into the insertion hole.

5. The device for detecting the encroachment of foundation pit support piles according to claim 1, characterized in that, The number of perforations is at least two, and at least two perforations are equally spaced along the circumference of the anchor rod.

6. A detection method for an intrusion detection device for foundation pit support piles as described in any one of claims 1 to 5, characterized in that, Includes the following steps: At least two pull-out anchors are anchored in the side wall of the pit, and the at least two pull-out anchors are spaced apart along the circumferential direction of the pit, with the other end of the pull-out anchors extending to the outside of the side wall of the pit. The vertical support is suspended by a cable to the other end of the pull-out anchor, so that the at least two pull-out anchors are positioned by the cable on the outer edge of the underground structure; The weft cable is connected to the warp cable on two adjacent pull-out anchors, and the weft cable and the warp cable form a reference vertical plane; Construct foundation pit support piles, and determine whether the foundation pit support piles encroach on the limit based on the distance between the reference vertical plane and the foundation pit support piles.

Images