Deformation risk prevention and control equipment for complex road foundation pit near subway

Abstract

The utility model discloses deformation risk prevention and control equipment for a complex road foundation pit near a subway, and relates to the field of building construction equipment, the deformation risk prevention and control equipment comprises a groove, the groove is arranged between a subway tunnel and a foundation pit to be excavated, a steel sheet pile is inserted in the groove, concrete is poured in the groove between two adjacent steel sheet piles, and the steel sheet pile is arranged in the groove. And conventional supports for fixing the steel sheet piles are arranged on the ground. Compared with a model test method, a numerical simulation method and a field monitoring method, the device is simple in structure, low in cost and high in universality.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of building construction equipment especially relates to a subway nearby complex road foundation pit deformation risk prevention and control equipment. BACKGROUND

[0002] The subway belongs to the important component of city traffic and the subway line is located below the city road frequently, and the new city road engineering or the reconstruction city road engineering often has the relationship of crossing and crossing, parallel and adjacent with the subway line. The new city road engineering or the reconstruction city road engineering includes excavation foundation pit, and when excavating the foundation pit adjacent to the existing subway operation tunnel, the soil unloading, dewatering, vibration loading and other construction operations in the excavation process will cause the movement of the soil around the foundation pit. The soil around the foundation pit will interact with the tunnel when moving, which may cause the deformation, inclination, uplift, settlement and cracking of the subway tunnel, and simultaneously cause the synchronous deformation of the excavated foundation pit.

[0003] In view of the influence of the foundation pit excavation on the deformation of the adjacent existing subway tunnel, the existing solutions include model test method, numerical simulation method and field monitoring method. Among them, the model test method obtains the test results by reducing the site in a certain proportion and controlling various variables and finally recording, and the advantage is that the site can be directly obtained after the site is visually copied, and the result is more reliable than the numerical simulation result. The field monitoring method is the field monitoring data, and the influence and law of the foundation pit excavation on the deformation of the existing tunnel are obtained by analyzing the field monitoring data by relevant experts and scholars, so as to guide the foundation pit construction and subway maintenance work.

[0004] Whether it is the model test method, the numerical simulation method or the field monitoring method, it is a means and method to reduce the foundation pit deformation risk, which needs to be analyzed according to the specific situation of the construction site, and the cost is high and other foundation pits cannot be effectively referenced during construction, so the universality is not strong. Therefore, how to provide a subway nearby complex road foundation pit deformation risk prevention and control equipment with simple structure, low cost and strong universality has become a difficult problem to be solved by the technical personnel in the field. SUMMARY

[0005] The utility model aims at providing a subway nearby complex road foundation pit deformation risk prevention and control equipment, solving the problem of weak universality caused by the fact that the existing model test method, numerical simulation method and field monitoring method need to be analyzed according to the specific situation of the construction site and other foundation pits cannot be effectively referenced during construction.

[0006] To solve the above technical problems, the utility model adopts the following technical scheme:

[0007] The utility model provides a subway nearby complex road foundation pit deformation risk prevention and control equipment, including recess, the recess is established between subway tunnel and the foundation pit to be dug, the recess is inserted with steel sheet pile, the recess between adjacent two steel sheet piles pours with concrete, the ground is provided with the conventional support of fixing steel sheet pile.

[0008] Preferably, the recess top is symmetrically placed with a guide wall, and the steel sheet pile is located between the two symmetrically arranged guide walls.

[0009] Preferably, the conventional support is placed with multiple and symmetrically arranged on both sides of the recess.

[0010] Preferably, the bottom of the recess is paved with a layer of sandstone.

[0011] Preferably, the excavation depth of the recess is not less than the embedding depth of the subway tunnel.

[0012] Preferably, the upper and lower ends of the middle convex panel of the steel sheet pile are symmetrically provided with a first MEMS sensor mounting base, a warning light and a chip are installed on the top of the steel sheet pile, the chip is electrically connected with the first MEMS sensor mounting base and the warning light respectively, a micro battery is arranged on the chip, and the micro battery supplies power to the first MEMS sensor mounting base, the warning light and the chip; a micro-mechanical pressure sensor is inserted into the first MEMS sensor mounting base, and the micro-mechanical pressure sensor on the top of the steel sheet pile abuts against the guide wall.

[0013] Preferably, the first MEMS sensor mounting base is arranged on the outer side of the middle convex panel of the steel sheet pile, a second MEMS sensor mounting base is arranged on the inner side of the middle convex panel of the steel sheet pile, the second MEMS sensor mounting base is provided with multiple and symmetrically arranged at the upper and lower ends of the middle convex panel of the steel sheet pile, a micro acceleration sensor is inserted into the second MEMS sensor mounting base, the second MEMS sensor mounting base is electrically connected with the chip, and the micro battery supplies power to the second MEMS sensor mounting base.

[0014] Preferably, a through hole for fixation is symmetrically arranged on both sides of the top of the middle convex panel of the steel sheet pile.

[0015] Preferably, an anti-aging geomembrane is wrapped on the connecting panel at the left and right ends of the steel sheet pile, the connecting panel at the left and right ends of the steel sheet pile is located in the same plane, and the middle convex panel of the steel sheet pile protrudes from the connecting panel at the left and right ends of the steel sheet pile.

[0016] Compared with the prior art, the utility model has the beneficial technical effects that:

[0017] The utility model discloses a recess is dug between subway tunnel and the foundation pit to be dug, and the steel sheet pile is inserted in the recess and is poured concrete, effectively reduce the risk of soil flow that the construction operation of soil unloading, precipitation, vibration loading etc. in the excavation process when excavating the foundation pit, effectively solve the problem of subway tunnel deformation and foundation pit deformation caused by soil flow. Compared with model test method, numerical simulation method and field monitoring method, the equipment structure is simple, and the cost is low, and the versatility is strong. BRIEF DESCRIPTION OF DRAWINGS

[0018] The utility model makes further explanation to the utility model in combination with the drawings.

[0019] Fig. 1 It is the utility model subway nearby complex road foundation pit deformation risk prevention and control equipment structure diagram;

[0020] Fig. 2 It is the utility model recess part top view

[0021] Fig. 3 It is the utility model steel sheet pile structure diagram.

[0022] Figure legend explanation: 1, recess, 2, subway tunnel, 3, foundation pit to be dug, 4, steel sheet pile, 5, conventional support, 6, guide wall, 7, sandstone, 41, first MEMS sensor installation base, 42, warning light, 43, chip, 44, second MEMS sensor installation base. DETAILED DESCRIPTION

[0023] In order to make the technical problem, technical scheme and beneficial effect that the utility model wants to solve more clear and clear, the following combines the drawings and examples, and further detailed explanation is made to the utility model. It should be understood that the specific embodiments described here are only used to explain the utility model, and are not used to limit the utility model.

[0024] As Figs. 1-3 The utility model discloses a subway nearby complex road foundation pit deformation risk prevention and control equipment, including recess 1, the recess 1 is set up between subway tunnel 2 and the foundation pit 3 to be dug, the recess 1 is inserted with steel sheet pile 4, and the recess 1 between adjacent two steel sheet piles 4 pours and has the concrete, and the ground is provided with the conventional support 5 for fixing the steel sheet pile 4.

[0025] Among them, the concrete and conventional support 5 are used for fixing the steel sheet pile 4, after the steel sheet pile 4 is inserted in the recess 1 and the concrete is poured, the foundation pit 3 is excavated again, to reduce the influence of the construction operation such as soil unloading, precipitation, vibration loading etc. in the foundation pit excavation process on the surrounding soil, reduce the foundation pit deformation risk and the deformation risk of subway tunnel 2.

[0026] In the specific implementation, the skilled in the art can set various retaining structures in advance before the foundation pit is excavated, the retaining structures are located on one side of the groove 1 and correspond to the subway tunnel 2 on the other side of the groove 1, so as to further reduce the influence of the construction operations such as earth unloading, dewatering and vibration loading in the process of the foundation pit excavation on the surrounding soil. The retaining structures include reinforced concrete precast piles, cast-in-place piles and underground continuous walls and the like.

[0027] Specifically, the guide walls 6 are symmetrically arranged at the top of the groove, and the steel sheet piles 4 are arranged between the two symmetrically arranged guide walls 6.

[0028] Specifically, the guide walls 6 are inverted L-shaped, and the guide walls 6 facilitate the skilled in the art to place the steel sheet piles 4 inside the groove 1. Meanwhile, the top of the steel sheet pile 4 is provided with a micro-mechanical pressure sensor, and the micro-mechanical pressure sensor is abutted on the vertical wall of the guide wall 6, so as to improve the inspection accuracy of the micro-mechanical pressure sensor.

[0029] Specifically, the conventional supports 5 are symmetrically arranged on both sides of the groove 1.

[0030] Specifically, the bottom of the groove 1 is paved with a layer of sand and gravel 7.

[0031] Specifically, the excavation depth of the groove 1 is not less than the buried depth of the subway tunnel 2.

[0032] Specifically, the upper and lower ends of the middle convex panel of the steel sheet pile 4 are symmetrically provided with first MEMS sensor mounting bases 41, the top of the steel sheet pile 4 is provided with a warning light 42 and a chip 43, the chip 43 is electrically connected with the first MEMS sensor mounting base 41 and the warning light 42 respectively, a micro battery is arranged on the chip 43, and the micro battery supplies power to the first MEMS sensor mounting base 41, the warning light 42 and the chip 43 respectively; a micro-mechanical pressure sensor is inserted into the first MEMS sensor mounting base 41, and the micro-mechanical pressure sensor at the top of the steel sheet pile 4 is abutted on the guide wall 6.

[0033] When the chip 43 detects that the monitoring pressure value of the corresponding micro-mechanical pressure sensor is not in the preset threshold interval, the warning light 42 is controlled to work, so as to remind the construction personnel that there is a risk of soil flow in the foundation pit construction.

[0034] Specifically, the first MEMS sensor mounting base 41 is arranged on the outer side of the middle protruding panel of the steel sheet pile 4, the inner side of the middle protruding panel of the steel sheet pile 4 is provided with a second MEMS sensor mounting base 44, the second MEMS sensor mounting base 44 is arranged at the upper and lower ends of the middle protruding panel of the steel sheet pile 4 and is symmetrical, the micro acceleration sensor is inserted into the second MEMS sensor mounting base 44, the second MEMS sensor mounting base 44 is electrically connected with the chip 43, and the micro battery supplies power for the second MEMS sensor mounting base 44.

[0035] When the monitoring value of the micro acceleration sensor received by the chip 43 is greater than a preset threshold value, the control warning lamp 42 is controlled to work, so as to remind the construction personnel that there is a danger of soil flow in the foundation pit construction.

[0036] Specifically, the top of the middle protruding panel of the steel sheet pile 4 is symmetrically provided with a through hole for fixation.

[0037] Specifically, the connecting panels at the left and right ends of the steel sheet pile 4 are wrapped with an anti-aging geomembrane, the connecting panels at the left and right ends of the steel sheet pile 4 are located in the same plane, and the middle protruding panel of the steel sheet pile 4 protrudes from the connecting panels at the left and right ends of the steel sheet pile 4.

[0038] In the specific implementation, the anti-aging geomembrane can be cut by the person skilled in the art, and the steel sheet pile 4 in the groove 1 can be taken out, so that the steel sheet pile 4 can be recycled, and the residual space in the groove 1 is used for pouring reinforced concrete.

[0039] It should be noted that, in the present document, the terms such as first and second are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or device.

[0040] The above-described embodiments are only used to describe the preferred modes of the present application, and do not limit the scope of the present application, and various modifications and improvements of the technical solutions of the present application made by the person skilled in the art without departing from the design spirit of the present application shall fall within the protection scope of the present application.

Claims

1. A subway near complex road foundation pit deformation risk prevention and control equipment, characterized in that: The groove (1) is arranged between the subway tunnel (2) and the foundation pit (3) to be excavated, the steel sheet pile (4) is inserted in the groove (1), and the concrete is poured in the groove (1) between two adjacent steel sheet piles (4); the conventional support (5) is arranged on the ground to fix the steel sheet pile (4).

2. The subway nearby complex road foundation pit deformation risk prevention and control equipment according to claim 1, characterized in that: The guide wall (6) is symmetrically arranged on the top of the groove (1), and the steel sheet pile (4) is located between the two symmetrically arranged guide walls (6).

3. The subway nearby complex road foundation pit deformation risk prevention and control equipment according to claim 1, characterized in that: The conventional support (5) is arranged on the both sides of the groove (1) and symmetrically arranged.

4. The subway nearby complex road foundation pit deformation risk prevention and control equipment according to claim 1, characterized in that: The bottom of the groove (1) is paved with a layer of sand and gravel (7).

5. The subway nearby complex road foundation pit deformation risk prevention and control equipment according to claim 1, characterized in that: The excavation depth of the groove (1) is not less than the buried depth of the subway tunnel (2).

6. The subway nearby complex road foundation pit deformation risk prevention and control equipment according to claim 2, characterized in that: The first MEMS sensor mounting base (41) is symmetrically arranged on the upper and lower ends of the middle protruding panel of the steel sheet pile (4), the warning light (42) and the chip (43) are arranged on the top of the steel sheet pile (4), the chip (43) is electrically connected with the first MEMS sensor mounting base (41) and the warning light (42) respectively, the micro battery is arranged on the chip (43), and the micro battery supplies power to the first MEMS sensor mounting base (41), the warning light (42) and the chip (43); the micro mechanical pressure sensor is inserted in the first MEMS sensor mounting base (41), and the micro mechanical pressure sensor on the top of the steel sheet pile (4) abuts against the guide wall (6).

7. The subway nearby complex road foundation pit deformation risk prevention and control equipment according to claim 6, characterized in that: The first MEMS sensor mounting base (41) is arranged on the outer side of the middle protruding panel of the steel sheet pile (4), the second MEMS sensor mounting base (44) is arranged on the inner side of the middle protruding panel of the steel sheet pile (4), the second MEMS sensor mounting base (44) is arranged on the upper and lower ends of the middle protruding panel of the steel sheet pile (4) and symmetrically arranged, the micro acceleration sensor is inserted in the second MEMS sensor mounting base (44), the second MEMS sensor mounting base (44) is electrically connected with the chip (43), and the micro battery supplies power to the second MEMS sensor mounting base (44).

8. The subway nearby complex road foundation pit deformation risk prevention and control equipment according to claim 1, characterized in that: The through holes for fixing are symmetrically arranged on the top of the middle protruding panel of the steel sheet pile (4).

9. The subway nearby complex road foundation pit deformation risk prevention and control equipment according to claim 1, characterized in that: The anti-aging geomembrane is wrapped on the connecting panels at the left and right ends of the steel sheet pile (4), the connecting panels at the left and right ends of the steel sheet pile (4) are located in the same plane, and the middle protruding panel of the steel sheet pile (4) protrudes from the connecting panels at the left and right ends of the steel sheet pile (4).

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