A deep foundation pit support structure for bored piles

Abstract

This invention relates to the field of deep foundation pit technology and provides a deep foundation pit support structure using bored cast-in-place piles. The structure includes a fixed base plate and bored cast-in-place piles. The fixed base plate is fixed to the bottom of the deep foundation pit by the bored cast-in-place piles. A support plate is rotatably connected to the fixed base plate. The structure also includes a first support plate, a second support plate, a sliding block, and a transmission screw. The first support plate is rotatably connected to the support plate. A guide groove is provided on the fixed base plate. The sliding block is slidably connected within the guide groove. The transmission screw is rotatably connected within the guide groove and threadedly connected to the sliding block. When the bottom of the deep foundation pit sinks significantly, even if the elastic expansion joint is fully extended, the support plate cannot contact the sidewall of the deep foundation pit. In this case, there is no elastic thrust between the first and second support plates. The warning component emits a warning sound, thus reminding workers to adjust the support structure and improving construction safety.

Description

Technical Field

[0001] This invention belongs to the field of deep foundation pit technology, and particularly relates to a deep foundation pit support structure for bored cast-in-place piles. Background Technology

[0002] Deep foundation pits refer to projects with an excavation depth exceeding 5 meters (including 5 meters), or projects with particularly complex geological conditions, surrounding environment, and underground pipelines even if the depth does not exceed 5 meters.

[0003] To prevent the sidewalls of deep foundation pits from collapsing or falling rocks due to loose soil, it is generally necessary to reinforce or support the sidewalls of deep foundation pits.

[0004] A deep foundation pit support structure with publication number CN112832255B is described. In use, a fixing rod is passed through a fixing hole and inserted into the bottom wall of the foundation pit. Then, a limiting plate is rotated so that the limiting plate is in close contact with the lower end face of the limiting block. Next, a hydraulic cylinder is activated, pushing a sliding block to slide within an adjusting groove, causing the support rod to press against the support plate. Under the action of the support rod, the support plate is pressed tightly against the inner wall of the foundation pit. A positioning rod is then passed through the sliding block and the elongated hole, inserting the positioning rod vertically into the bottom wall of the foundation pit. Finally, a reinforcing rod is passed through the oblong hole and inserted into the inner wall of the foundation pit. A hexagonal wrench is used to screw the fixing bolts on the fixing arm into the connecting holes on the connecting plate, thus completing the foundation pit support.

[0005] Although the above-mentioned application can achieve the effect of support, the soil in the deep foundation pit is soft. When the soil layer sinks, the support base cannot make contact with the ground. At this time, the support base cannot push the support plate to support the side wall of the deep foundation pit. Moreover, when the gap between the support bases is small, the workers cannot detect the support situation in time, which poses a safety risk. Summary of the Invention

[0006] The purpose of this invention is to provide a deep foundation pit support structure for bored piles, which aims to solve the problem that existing support devices cannot push the support plate to support the sidewall of the deep foundation pit when the soil subsides.

[0007] This invention is implemented as follows: a deep foundation pit support structure using bored cast-in-place piles includes a fixed base plate and bored cast-in-place piles. The fixed base plate is fixed to the bottom of the deep foundation pit by the bored cast-in-place piles. A support plate is rotatably connected to the fixed base plate. The structure also includes:

[0008] First support plate, second support plate, sliding block and transmission screw;

[0009] The first support plate is rotatably connected to the support plate, the fixed base plate is provided with a guide groove, the sliding block is slidably connected in the guide groove, the transmission screw is rotatably connected in the guide groove and the transmission screw is threadedly connected to the sliding block, the second support plate is rotatably connected to the sliding block and the second support plate is slidably connected in the first support plate;

[0010] An elastic telescopic component creates an elastic thrust between a first support plate and a second support plate through elastic telescopic movement. The two ends of the elastic telescopic component are respectively connected to the first support plate and the second support plate.

[0011] A shrinkage restriction component is used to restrict the shrinkage of the elastic telescopic component, the shrinkage restriction component being disposed on the elastic telescopic component;

[0012] The warning component emits a warning sound when there is no elastic thrust between the first support plate and the second support plate, and the warning component is disposed on the first support plate.

[0013] A further technical solution includes the elastic telescopic component comprising a first link, a second link, a third link, a fourth link, a fifth link, a sixth link, a seventh link, an eighth link, a ninth pin, a fixed plate, a first tension spring, a slider, and an eighth pin. One end of the first link and the second link are rotatably connected to the first support plate. The end of the first link is rotatably connected to the third link via the first pin. The end of the third link is rotatably connected to the sixth link via the fourth pin. The end of the sixth link is rotatably connected to the eighth link via the fifth pin. The end of the second link is rotatably connected to the fourth link via the second pin. The end of the fourth link... A fifth link is rotatably connected via a third pin. The end of the fifth link is rotatably connected to a seventh link via a sixth pin. The ends of both the seventh and eighth links are rotatably connected to a second support plate. The first and second pins are elastically connected via a first tension spring. The third and fourth pins are elastically connected via a first tension spring. The fifth and sixth pins are elastically connected via a first tension spring. The middle sections of the third and fourth links are rotatably connected via a ninth pin. The middle sections of the fifth and sixth links are rotatably connected via an eighth pin. Fixed plates are fixed to both the first and second support plates. Slider blocks are slidably connected to both fixed plates. The ninth and eighth pins are rotatably connected to the two sliders, respectively.

[0014] In a further technical solution, the first support plate is provided with scale values, and the length of the elastic telescopic component is measured by the scale values.

[0015] In a further technical solution, the limiting contraction assembly includes a bolt, a ratchet plate, a limiting slider, a first compression spring, and meshing teeth. A first groove is provided on the fixed plate, and the ratchet plate is slidably connected in the first groove. The bolt is threadedly connected to the fixed plate, and the end of the bolt is rotatably connected to the ratchet plate. A second groove is provided on the slider, and the limiting slider is slidably connected in the second groove. The first compression spring and the meshing teeth are respectively fixedly connected to both ends of the limiting slider, and the meshing teeth mesh with the ratchet plate.

[0016] In a further technical solution, the warning component includes a warning slider, a second tension spring, a striking block, a clicker, and a connecting component. A third groove is provided on the second support plate, and the warning slider is slidably connected in the third groove. The two ends of the second tension spring are respectively connected to the warning slider and the inner wall of the third groove. The striking block is fixed on the warning slider, and the clicker is fixed on the second support plate. When the second support plate slides in the opposite direction on the first support plate, the connecting component stretches the second tension spring through the warning slider. When the second support plate moves to the end of the first support plate, the connecting component releases the warning slider.

[0017] In a further technical solution, the warning component also includes a pull block, a telescopic slider, a telescopic pull block, and a push slider. The warning slider is provided with a telescopic groove and a push groove that are connected. The telescopic slider and the push slider are slidably connected in the telescopic groove and the push groove, respectively. The telescopic slider is provided with a push groove. The push slider passes through the push groove, and one side wall of the push groove is inclined. The pull block and the telescopic pull block are respectively fixed on the second support plate and the telescopic slider.

[0018] In a further technical solution, multiple bored piles are provided on the fixed base plate.

[0019] This invention provides a deep foundation pit support structure for bored piles. When ground subsidence causes the fixed base plate to move downwards or rotate, the elastic telescopic component extends, causing the first support plate to move away from the second support plate. This, in turn, causes the first and second support plates to extend, bringing the support plate into contact with the sidewall of the deep foundation pit, thus providing support. When the bottom of the deep foundation pit subsides significantly, even if the elastic telescopic component is fully extended, the support plate may still not be able to contact the sidewall of the deep foundation pit. In this case, there is no elastic thrust between the first and second support plates, and the warning component emits a warning sound, reminding workers to adjust the support structure, thereby improving construction safety. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a deep foundation pit support structure for bored cast-in-place piles provided in an embodiment of the present invention;

[0021] Figure 2 Provided for embodiments of the present invention Figure 1 Schematic diagram of the structure of the elastic telescopic component;

[0022] Figure 3 Provided for embodiments of the present invention Figure 1 A bottom view of the structure of the elastic telescopic component;

[0023] Figure 4 Provided for embodiments of the present invention Figure 1 A top-view schematic diagram of the internal structure of the flexible telescopic component;

[0024] Figure 5 Provided for embodiments of the present invention Figure 2 A magnified structural diagram of A in the middle;

[0025] Figure 6 Provided for embodiments of the present invention Figure 4 A magnified structural diagram of B in the diagram;

[0026] Figure 7 Provided for embodiments of the present invention Figure 4 A magnified structural diagram of C.

[0027] In the attached diagram: fixed base plate 101, support plate 102, first support plate 103, second support plate 104, guide groove 105, sliding block 106, transmission screw 107, bored pile 108, elastic telescopic component 2, first connecting rod 201, second connecting rod 202, third connecting rod 203, fourth connecting rod 204, fifth connecting rod 205, sixth connecting rod 206, seventh connecting rod 207, eighth connecting rod 208, ninth pin 209, first pin 210, second pin 211, third pin 212, fourth pin 213, fifth pin 214, and so on. Sixth pin 215, fixed plate 216, first tension spring 217, slider 218, eighth pin 219, limiting retraction assembly 3, bolt 301, first slide groove 302, ratchet plate 303, second slide groove 304, limiting slider 305, first compression spring 306, meshing teeth 307, warning assembly 4, third slide groove 401, warning slider 402, second tension spring 403, striking block 404, clicker 405, pull block 406, telescopic slide groove 407, telescopic slider 408, telescopic pull block 409, push groove 410, push slide groove 411, push slider 412. Detailed Implementation

[0028] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0029] The specific implementation of the present invention will be described in detail below with reference to specific embodiments.

[0030] like Figures 1-4 As shown, a deep foundation pit support structure for bored cast-in-place piles is provided in one embodiment of the present invention, including a fixed base plate 101 and bored cast-in-place piles 108. The fixed base plate 101 is fixed to the bottom of the deep foundation pit by the bored cast-in-place piles 108. A support plate 102 is rotatably connected to the fixed base plate 101. The structure also includes:

[0031] First support plate 103, second support plate 104, sliding block 106 and transmission screw 107;

[0032] The first support plate 103 is rotatably connected to the support plate 102. The fixed base plate 101 is provided with a guide groove 105. The sliding block 106 is slidably connected in the guide groove 105. The transmission screw 107 is rotatably connected in the guide groove 105 and is threadedly connected to the sliding block 106. The second support plate 104 is rotatably connected to the sliding block 106 and is slidably connected in the first support plate 103.

[0033] The elastic telescopic component 2 creates an elastic thrust between the first support plate 103 and the second support plate 104 through elastic telescopic movement. The two ends of the elastic telescopic component 2 are respectively connected to the first support plate 103 and the second support plate 104.

[0034] A shrinkage restriction component 3 is used to restrict the shrinkage of the elastic telescopic component 2, and the shrinkage restriction component 3 is disposed on the elastic telescopic component 2;

[0035] The warning component 4 emits a warning sound when there is no elastic thrust between the first support plate 103 and the second support plate 104. The warning component 4 is disposed on the first support plate 103.

[0036] Multiple bored piles 108 are provided on the fixed base plate 101.

[0037] In this embodiment of the invention, during use, the fixed base plate 101 is fixed in the deep foundation pit by the bored pile 108, so that the support plate 102 contacts the side wall of the deep foundation pit. A wrench is used to rotate the transmission screw 107, which drives the sliding block 106 to move towards the support plate 102. The sliding block 106 causes the second support plate 104 to extend into the first support plate 103, thereby compressing the elastic telescopic component 2. The elastic telescopic component 2 contracts, pushing the first support plate 103 and the second support plate 104, creating an elastic thrust between them. This causes the support plate 102 to press against the side wall of the deep foundation pit, and the limiting contraction component 3 is used to limit the elasticity. When the elastic expansion joint 2 retracts, it ensures that the supporting force of the support plate 102 does not decrease. When the ground subsides, causing the fixed base plate 101 to move downward or rotate, the elastic expansion joint 2 extends, thereby causing the first support plate 103 to move away from the second support plate 104. This causes the first support plate 103 and the second support plate 104 to extend, allowing the support plate 102 to contact the side wall of the deep foundation pit, thus providing support. When the bottom of the deep foundation pit subsides severely, even if the elastic expansion joint 2 is fully extended, the support plate 102 cannot contact the side wall of the deep foundation pit. In this case, there is no elastic thrust between the first support plate 103 and the second support plate 104. The warning component 4 then emits a warning sound, reminding workers to adjust the support structure, thereby improving construction safety.

[0038] like Figures 1-6As shown, in a preferred embodiment of the present invention, the elastic telescopic component 2 includes a first connecting rod 201, a second connecting rod 202, a third connecting rod 203, a fourth connecting rod 204, a fifth connecting rod 205, a sixth connecting rod 206, a seventh connecting rod 207, an eighth connecting rod 208, a ninth pin 209, a first pin 210, a second pin 211, a third pin 212, a fourth pin 213, a fifth pin 214, a sixth pin 215, a fixing plate 216, a first tension spring 217, a slider 218, and an eighth pin 219. 9. One end of the first connecting rod 201 and the second connecting rod 202 is rotatably connected to the first support plate 103. The end of the first connecting rod 201 is rotatably connected to the third connecting rod 203 via the first pin 210. The end of the third connecting rod 203 is rotatably connected to the sixth connecting rod 206 via the fourth pin 213. The end of the sixth connecting rod 206 is rotatably connected to the eighth connecting rod 208 via the fifth pin 214. The end of the second connecting rod 202 is rotatably connected to the fourth connecting rod 204 via the second pin 211. The end of the fourth link 204 is rotatably connected to the fifth link 205 via the third pin 212. The end of the fifth link 205 is rotatably connected to the seventh link 207 via the sixth pin 215. The ends of the seventh link 207 and the eighth link 208 are both rotatably connected to the second support plate 104. The first pin 210 and the second pin 211 are elastically connected by the first tension spring 217. The third pin 212 and the fourth pin 213 are elastically connected by the first tension spring 217. The fifth pin 214 and the... The six pins 215 are elastically connected by the first tension spring 217. The middle parts of the third link 203 and the fourth link 204 are rotatably connected by the ninth pin 209. The middle parts of the fifth link 205 and the sixth link 206 are rotatably connected by the eighth pin 219. The first support plate 103 and the second support plate 104 are both fixed with a fixing plate 216. The two fixing plates 216 are slidably connected with sliders 218. The ninth pin 209 and the eighth pin 219 are respectively rotatably connected to the two sliders 218.

[0039] In this embodiment of the invention, when the first support plate 103 and the second support plate 104 move toward each other, the included angle between the second connecting rod 202 and the fourth connecting rod 204 decreases, the entire elastic telescopic assembly 2 shortens, and the first pin 210 and the second pin 211, the third pin 212 and the fourth pin 213 move in opposite directions, thereby stretching the first tension spring 217. The multiple first tension springs 217 can pull the first pin 210 and the second pin 211, the third pin 212 and the fourth pin 213 to move toward each other, thereby increasing the included angle between the second connecting rod 202 and the fourth connecting rod 204, thereby stretching the entire elastic telescopic assembly 2, thereby causing the elastic telescopic assembly 2 to push the first support plate 103 and the second support plate 104 to move in opposite directions, thereby pushing the support plate 102 to contact the side wall of the deep foundation pit.

[0040] like Figure 1 As shown, in a preferred embodiment of the present invention, the first support plate 103 is provided with scale values, and the length of the elastic telescopic component 2 is measured by the scale values.

[0041] In this embodiment of the invention, the length of the elastic telescopic component 2 is observed by measuring the scale value, thereby viewing the remaining elongation value of the elastic telescopic component 2.

[0042] like Figures 1-6 As shown, in a preferred embodiment of the present invention, the limiting contraction assembly 3 includes a bolt 301, a ratchet plate 303, a limiting slider 305, a first compression spring 306, and a meshing tooth 307. The fixing plate 216 is provided with a first sliding groove 302, and the ratchet plate 303 is slidably connected in the first sliding groove 302. The bolt 301 is threadedly connected to the fixing plate 216, and the end of the bolt 301 is rotatably connected to the ratchet plate 303. The slider 218 is provided with a second sliding groove 304, and the limiting slider 305 is slidably connected in the second sliding groove 304. The first compression spring 306 and the meshing tooth 307 are respectively fixedly connected to both ends of the limiting slider 305, and the meshing tooth 307 engages with the ratchet plate 303.

[0043] In this embodiment of the invention, rotating the bolt 301 causes the ratchet plate 303 to slide in the first groove 302 in the opposite direction to the meshing tooth 307. The first compression spring 306 pushes the limiting slider 305, which in turn causes the meshing tooth 307 to move, thereby making the meshing tooth 307 mesh with the ratchet plate 303, thus restricting the movement of the slider 218, and further restricting the movement of the eighth pin 219 or the ninth pin 209, thereby restricting the contraction of the elastic telescopic component 2, and thus restricting the movement of the first support plate 103 and the second support plate 104 toward each other.

[0044] like Figures 1-7As shown, in a preferred embodiment of the present invention, the warning component 4 includes a warning slider 402, a second tension spring 403, a striking block 404, a clicker 405, and a connecting component. A third groove 401 is provided on the second support plate 104. The warning slider 402 is slidably connected within the third groove 401. The two ends of the second tension spring 403 are respectively connected to the warning slider 402 and the inner wall of the third groove 401. The striking block 404 is fixed to the warning slider 402. The clicker 405 is fixed to the second support plate 104. When the second support plate 104 slides in the opposite direction on the first support plate 103, the connecting component stretches the second tension spring 403 through the warning slider 402. When the connecting component moves to the end of the second support plate 104, the warning slider 402 is released. The warning component 4 also includes a pull block 406, a telescopic slider 408, a telescopic pull block 409, and a push slider 412. The warning slider 402 is provided with a telescopic groove 407 and a push groove 411 that are connected. The telescopic slider 408 and the push slider 412 are slidably connected in the telescopic groove 407 and the push groove 411, respectively. The telescopic slider 408 is provided with a push groove 410. The push slider 412 passes through the push groove 410, and one side wall of the push groove 410 is inclined. The pull block 406 and the telescopic pull block 409 are respectively fixed on the second support plate 104 and the telescopic slider 408.

[0045] In this embodiment of the invention, when the first support plate 103 and the second support plate 104 move in opposite directions, the second support plate 104 drives the pull block 406 to move, the pull block 406 drives the telescopic pull block 409 to move, the telescopic pull block 409 drives the telescopic slider 408 to move, the telescopic slider 408 drives the warning slider 402 to move, and the warning slider 402 stretches the second tension spring 403 until the first support plate 103 and the second support plate 104 reach their longest length, pushing the slider 412 to contact the end of the third slide groove 401. Pushing slider 412 moves relative to warning slider 402, pushing slider 412 pushes the inclined surface of push groove 410, thereby causing slider 412 to push telescopic slider 408 to move. Telescopic slider 408 drives telescopic pull block 409 to move away from pull block 406 in the opposite direction, thereby preventing telescopic pull block 409 from contacting pull block 406. At this time, second tension spring 403 pulls warning slider 402 to move in the opposite direction. Warning slider 402 drives knocking block 404 to move in the opposite direction, causing knocking block 404 to strike clicker 405 to produce sound. Clicker 405 is a thin metal sheet.

[0046] The above embodiments of the present invention provide a deep foundation pit support structure using bored piles. In use, the fixed base plate 101 is fixed in the deep foundation pit by the bored pile 108, so that the support plate 102 contacts the side wall of the deep foundation pit. A wrench is used to rotate the transmission screw 107, which drives the sliding block 106 to move towards the support plate 102. The sliding block 106 causes the second support plate 104 to extend into the first support plate 103. When the first support plate 103 and the second support plate 104 move towards each other, the included angle between the second connecting rod 202 and the fourth connecting rod 204 decreases, and the entire elastic telescopic assembly 2 shortens. The first pin 210 moves in opposite directions to the second pin 211, and the third pin 212 moves in opposite directions to the fourth pin 213, thereby stretching the first tension spring 217 and increasing its elasticity. When the telescopic component 2 retracts, it pushes the first support plate 103 and the second support plate 104, creating an elastic thrust between them. This causes the support plate 102 to press against the sidewall of the deep pit. Rotating the bolt 301 causes the ratchet plate 303 to slide in the first groove 302 towards the meshing teeth 307. The first compression spring 306 pushes the limiting slider 305, which in turn moves the meshing teeth 307, causing them to engage with the ratchet plate 303. This restricts the movement of the slider 218, which in turn restricts the movement of the eighth pin 219 or the ninth pin 209, thus limiting the retraction of the elastic telescopic component 2 and restricting the first support plate 103 and the second support plate 104 from moving towards each other. The movement ensures that the supporting force of the support plate 102 does not decrease. When the ground subsidence causes the fixed base plate 101 to move downward or rotate, the elastic telescopic component 2 extends. Multiple first tension springs 217 can pull the first pin 210 and the second pin 211, the third pin 212 and the fourth pin 213 to move in opposite directions, thereby increasing the angle between the second link 202 and the fourth link 204, and thus extending the entire elastic telescopic component 2. This causes the elastic telescopic component 2 to push the first support plate 103 and the second support plate 104 to move in opposite directions, thereby pushing the support plate 102 to contact the side wall of the deep foundation pit, thus achieving a supporting effect. When the bottom of the deep foundation pit subsides severely, when the first support plate 103 and the second support plate 104 move in opposite directions, the second support plate 102... 04 drives the pull block 406 to move, the pull block 406 drives the telescopic pull block 409 to move, the telescopic pull block 409 drives the telescopic slider 408 to move, the telescopic slider 408 drives the warning slider 402 to move, the warning slider 402 stretches the second tension spring 403 until the first support plate 103 and the second support plate 104 reach their longest length, pushing the slider 412 to contact the end of the third slide groove 401. The end of the third slide groove 401 pushes the slider 412 to move relative to the warning slider 402, pushing the slider 412 to push the inclined surface of the push groove 410, thereby causing the slider 412 to push the telescopic slider 408 to move. The telescopic slider 408 drives the telescopic pull block 409 to move away from the pull block 406 in the opposite direction, thereby preventing the telescopic pull block 409 from contacting the pull block 406.At this time, the second tension spring 403 pulls the warning slider 402 to move in the opposite direction. The warning slider 402 then drives the striking block 404 to move in the opposite direction, causing the striking block 404 to strike the sounder 405 and produce a sound. This alerts the workers to adjust the support structure, thereby improving construction safety.

[0047] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A deep foundation pit support structure using bored cast-in-place piles, comprising a fixed base plate and bored cast-in-place piles, wherein the fixed base plate is fixed to the bottom of the deep foundation pit by the bored cast-in-place piles, and a support plate is rotatably connected to the fixed base plate, characterized in that... Also includes: First support plate, second support plate, sliding block and transmission screw; The first support plate is rotatably connected to the support plate, the fixed base plate is provided with a guide groove, the sliding block is slidably connected in the guide groove, the transmission screw is rotatably connected in the guide groove and the transmission screw is threadedly connected to the sliding block, the second support plate is rotatably connected to the sliding block and the second support plate is slidably connected in the first support plate; An elastic telescopic component creates an elastic thrust between a first support plate and a second support plate through elastic telescopic movement. The two ends of the elastic telescopic component are respectively connected to the first support plate and the second support plate. A shrinkage restriction component is used to restrict the shrinkage of the elastic telescopic component, the shrinkage restriction component being disposed on the elastic telescopic component; An early warning component that emits an early warning sound when there is no elastic thrust between the first support plate and the second support plate, wherein the early warning component is disposed on the first support plate; The warning assembly includes a warning slider, a second tension spring, a striking block, a clicker, and a connecting assembly. A third groove is provided on the second support plate, and the warning slider is slidably connected in the third groove. The two ends of the second tension spring are respectively connected to the warning slider and the inner wall of the third groove. The striking block is fixed on the warning slider, and the clicker is fixed on the second support plate. When the second support plate slides in the opposite direction on the first support plate, the connecting assembly stretches the second tension spring through the warning slider. When the second support plate moves to the end of the first support plate, the connecting assembly releases the warning slider. The warning component also includes a pull block, a telescopic slider, a telescopic pull block, and a push slider. The warning slider is provided with a telescopic groove and a push groove that are connected. The telescopic slider and the push slider are slidably connected in the telescopic groove and the push groove, respectively. The telescopic slider is provided with a push groove. The push slider passes through the push groove, and one side wall of the push groove is inclined. The pull block and the telescopic pull block are respectively fixed on the second support plate and the telescopic slider.

2. The deep foundation pit support structure for bored cast-in-place piles according to claim 1, characterized in that, The elastic telescopic component includes a first link, a second link, a third link, a fourth link, a fifth link, a sixth link, a seventh link, an eighth link, a ninth pin, a fixed plate, a first tension spring, a slider, and an eighth pin. One end of the first and second links is rotatably connected to the first support plate. The end of the first link is rotatably connected to the third link via the first pin. The end of the third link is rotatably connected to the sixth link via the fourth pin. The end of the sixth link is rotatably connected to the eighth link via the fifth pin. The end of the second link is rotatably connected to the fourth link via the second pin. The end of the fourth link is connected to the eighth link via the third pin. A fifth link is rotatably connected to the shaft. The end of the fifth link is rotatably connected to a seventh link via a sixth pin. The ends of both the seventh and eighth links are rotatably connected to a second support plate. The first and second pins are elastically connected by a first tension spring. The third and fourth pins are elastically connected by a first tension spring. The fifth and sixth pins are elastically connected by a first tension spring. The middle parts of the third and fourth links are rotatably connected by a ninth pin. The middle parts of the fifth and sixth links are rotatably connected by an eighth pin. Fixed plates are fixed on both the first and second support plates. Slider blocks are slidably connected to both fixed plates. The ninth and eighth pins are rotatably connected to the two sliders, respectively.

3. The deep foundation pit support structure for bored piles according to claim 2, characterized in that, The first support plate is provided with scale values, and the length of the elastic telescopic component is measured by the scale values.

4. The deep foundation pit support structure for bored cast-in-place piles according to claim 2, characterized in that, The restricted contraction assembly includes a bolt, a ratchet plate, a limiting slider, a first compression spring, and meshing teeth. The fixed plate is provided with a first sliding groove, and the ratchet plate is slidably connected in the first sliding groove. The bolt is threadedly connected to the fixed plate, and the end of the bolt is rotatably connected to the ratchet plate. The slider is provided with a second sliding groove, and the limiting slider is slidably connected in the second sliding groove. The first compression spring and the meshing teeth are respectively fixedly connected to both ends of the limiting slider, and the meshing teeth mesh with the ratchet plate.

5. The deep foundation pit support structure for bored cast-in-place piles according to claim 1, characterized in that, Multiple bored piles are installed on the fixed base plate.

Images