Working well containment

Abstract

The application discloses a working well enclosure structure arranged in a working well extending towards the ground, wherein the working well enclosure structure comprises multiple ground-connected walls, a crown beam, multiple ring frame beams and multiple concrete supports; the multiple ground-connected walls are arranged along the depth direction of the working well and are sequentially connected to each other to form an enclosure frame, and the outer wall surface of the enclosure frame is in abutment with the inner wall surface of the working well; the crown beam is arranged at the upper end of the enclosure structure and extends along the outer edge of the enclosure structure; the multiple ring frame beams are arranged in the enclosure frame and are located below the crown beam, the ring frame beams extend along the inner edge of the enclosure frame, and the multiple ring frame beams are sequentially distributed along the depth direction of the working well; multiple concrete supports are arranged in each ring frame beam and are spaced apart from each other, and multiple concrete supports are arranged in the crown beam and are spaced apart from each other; wherein the ground-connected walls, the crown beam, the ring frame beams and the concrete supports are all made of concrete pouring. The technical scheme of the application can increase the fixing performance of the enclosure structure on the rock stratum.

Description

Technical Field

[0001] This invention relates to the field of foundation pit support engineering technology, and in particular to a working well retaining structure. Background Technology

[0002] Currently, foundation pit retaining structures must not only ensure the stability of the pit and the safety and convenience of operations within it, but also control the displacement of the soil at the bottom and outside the pit within a certain range to ensure the normal use of adjacent buildings and municipal facilities. Foundation pit retaining structures include gravity-mixed pile retaining walls, diaphragm walls, and pile retaining walls. Diaphragm wall support technology primarily uses underground retaining structures to achieve water interception, seepage prevention, load-bearing, and water retention. However, when excavating working shafts in rock strata with poor physical and mechanical properties, the surface rock strata exhibit rheological and thixotropic properties, and the current retaining structures have relatively low strength and stiffness, resulting in poor fixation of the rock strata. This leads to significant deformation of the working shaft, potentially causing collapse accidents in the working shaft and the surrounding ground. Summary of the Invention

[0003] The main objective of this invention is to provide a working well retaining structure that increases the stability of the retaining structure for rock formations.

[0004] To achieve the above objectives, the present invention proposes a working well enclosure structure, which is installed within a working well extending underground, and includes:

[0005] Multiple diaphragm walls are provided, extending along the depth direction of the working well, and the multiple diaphragm walls are sequentially connected to each other to form an enclosure frame, with the outer wall surface of the enclosure frame abutting against the inner wall surface of the working well.

[0006] A cap beam is provided at the upper end of the enclosure structure and extends along the outer edge of the enclosure structure;

[0007] Multiple annular frame beams are disposed within the retaining frame and located below the capping beam. The annular frame beams extend along the inner edge of the retaining frame, and the multiple annular frame beams are sequentially distributed along the depth direction of the working well; and

[0008] Multiple concrete supports are provided, with multiple layers of the concrete supports distributed at intervals within each ring frame beam, and multiple layers of the concrete supports distributed at intervals within the cap beam;

[0009] The diaphragm wall, the capping beam, the ring frame beam, and the concrete support are all made of cast concrete.

[0010] Optionally, in the depth direction of the working well, the cross-sectional area of ​​the lower ring frame beam is greater than that of the upper ring frame beam.

[0011] Optionally, the multiple ring frame beams are divided into multiple ring frame beam groups along the depth direction of the working well. Different ring frame beams within the same ring frame beam group have the same cross-sectional area, and the cross-sectional area of ​​the ring frame beams in the lower ring frame beam group is greater than that in the upper ring frame beam group.

[0012] Optionally, all ring beams have the same height, and the ring beams in the same ring beam group have the same width, with the width of the ring beams in the lower ring beam group being greater than the width of the ring beams in the upper ring beam group.

[0013] Optionally, the cross-sectional area of ​​the ring frame beam is greater than the cross-sectional area of ​​the cap beam.

[0014] Optionally, the cross-sectional area of ​​the concrete support provided in the cap beam is smaller than the cross-sectional area of ​​the concrete support provided in the multiple ring frame beams.

[0015] Optionally, the capping beam is provided with two parallel concrete supports, which extend along the width direction of the working well, and both ends of the two concrete supports are connected to the capping beam.

[0016] Optionally, the end of the concrete support that connects to the cap beam is thickened.

[0017] Optionally, the ring frame beam is provided with two oppositely arranged concrete supports, which extend along the width direction of the working well, and both ends of the two concrete supports are connected to the ring frame beam.

[0018] Optionally, the working well retaining structure further includes multiple anchor pipes inserted into the rock strata, the multiple anchor pipes being disposed on the outer edge of the retaining frame, and a diaphragm wall being connected to the multiple anchor pipes, the multiple anchor pipes being used to fix multiple diaphragm walls.

[0019] This invention employs multiple diaphragm walls on the inner wall of the working well to stabilize the rock strata, prevent rock erosion, and prevent water from penetrating the rock and entering the working well. A ring beam is installed at the top of the retaining frame formed by the multiple diaphragm walls, pressing the upper end of the diaphragm walls firmly. Multiple spaced-apart ring beams are fixed to the inner wall of the diaphragm walls along the depth direction of the working well. The ring beams have a certain height and width, providing pressure to the diaphragm walls. Concrete supports support the open portions of the ring beams, giving them an outward expansion tendency and ensuring better pressure of the diaphragm walls against the inner wall of the working well. The multiple ring beams are connected by steel bars to support them within the working well. This arrangement enhances the support of the ring beams and capping beams for the diaphragm walls, thereby increasing the stability of the retaining structure against the rock strata. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a structural schematic diagram of the cap beam and concrete support of the working well enclosure structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the ring frame beam and concrete support of the working well enclosure structure of the present invention;

[0023] Explanation of icon numbers:

[0024] label name label name 10 Crown Beam 20 Ring frame beam 30 Concrete support 40 Working well

[0025] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0028] In this invention, unless otherwise explicitly specified and limited, the terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0029] Furthermore, if the embodiments of this invention involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this invention.

[0030] This invention proposes a working well enclosure structure.

[0031] In one embodiment of the present invention, such as Figure 1 and Figure 2 As shown, the retaining structure of the working well 40 includes: multiple diaphragm walls, a capping beam 10, multiple ring frame beams 20, and multiple concrete supports 30. The multiple diaphragm walls extend along the depth direction of the working well 40 and are sequentially connected to each other to form a retaining frame. The outer wall of the retaining frame abuts against the inner wall of the working well 40. The capping beam 10 is located at the upper end of the retaining structure and extends along the outer edge of the retaining structure. The multiple ring frame beams 20 are located within the retaining frame and below the capping beam 10. The ring frame beams 20 extend along the inner edge of the retaining frame and are sequentially distributed along the depth direction of the working well 40. Each ring frame beam 20 contains multiple mutually spaced concrete supports 30, and the capping beam 10 contains multiple mutually spaced concrete supports 30. The diaphragm walls, capping beam 10, ring frame beams 20, and concrete supports 30 are all made of cast concrete.

[0032] The technical solution of this invention involves providing multiple diaphragm walls on the inner wall of the working well 40 to stabilize the rock strata, prevent water loss, and prevent water from penetrating the rock strata into the working well 40. A ring beam 20 is provided at the upper end of the enclosure frame formed by the multiple diaphragm walls to press the upper end of the diaphragm walls firmly. Multiple ring beams 20 are spaced apart along the depth direction of the working well 40 and fixed to the inner wall of the diaphragm walls. The ring beams 20 have a certain height and width, and can exert a certain pressure on the diaphragm walls. Concrete supports 30 support the open portion in the middle of the ring beams 20, giving the ring beams 20 an outward expansion tendency, ensuring that the diaphragm walls are better pressed against the inner wall of the working well 40. The multiple ring beams 20 are connected by steel bars to support the ring beams 20 within the working well 40. This configuration enhances the support of the ring beam 20 and the cap beam 10 to the ground wall, thereby increasing the stability of the retaining structure against the rock strata.

[0033] In one embodiment, in the depth direction of the working well 40, the cross-sectional area of ​​the lower ring frame beam 20 is greater than that of the upper ring frame beam 20.

[0034] Specifically, the lower ring beams 20 experience greater pressure, making their support performance more crucial. Therefore, by increasing the cross-sectional area of ​​the lower ring beams 20 to make them larger than those of the upper ring beams 20, the lower ring beams 20 can withstand greater pressure in the vertical direction, thereby increasing the overall pressure resistance of the enclosure structure. In other embodiments, the cross-sectional area of ​​the lower ring beams 20 is equal to that of the upper ring beams 20.

[0035] In one embodiment, the multiple ring beams 20 are divided into multiple ring beam groups (not shown) along the depth direction of the working well 40. Different ring beams 20 within the same ring beam group (not shown) have the same cross-sectional area, and the cross-sectional area of ​​the ring beams 20 in the lower ring beam group (not shown) is greater than that in the upper ring beam group (not shown).

[0036] Specifically, in this embodiment, the multiple ring beams 20 are divided into three ring beam groups along the depth direction of the working well 40. The first ring beam group (not shown), the second ring beam group (not shown), and the third ring beam group (not shown) are distributed sequentially from top to bottom. The first ring beam group (not shown) contains two ring beams 20, the second ring beam group (not shown) contains two ring beams 20, and the third ring beam group (not shown) contains six ring beams 20. The cross-sectional area of ​​the multiple ring beams 20 in the first ring beam group (not shown) is smaller than that in the second ring beam group (not shown), and the cross-sectional area of ​​the multiple ring beams 20 in the second ring beam group (not shown) is smaller than that in the third ring beam group (not shown). This arrangement can further increase the pressure that the overall enclosure structure can withstand. In some other embodiments, the cross-sectional area of ​​the multiple ring beams 20 within the same ring beam group (not shown) gradually increases along the depth direction of the working well 40.

[0037] In one embodiment, all ring beams 20 have the same height, and the ring beams 20 in the same ring beam group (not shown) have the same width. The width of the ring beams 20 in the lower ring beam group (not shown) is greater than the width of the ring beams 20 in the upper ring beam group (not shown).

[0038] Specifically, since the depth of the working well 40 is fixed, all the ring beams 20 within the working well 40 have the same height. In this embodiment, all the ring beams 20 have a height of 1.2 meters. The width of the ring beams 20 in the ring beam group (not shown) closer to the bottom of the working well 40 increases, thereby increasing the cross-sectional area of ​​the lower ring beams 20. The width of the ring beams 20 in the first ring beam group (not shown) is 2.3 meters, the width of the ring beams 20 in the second ring beam group (not shown) is 2.5 meters, and the width of the ring beams 20 in the third ring beam group (not shown) is 3.0 meters. This arrangement increases the support performance of the lower ring beams 20 while ensuring the required space for the working well 40, without changing the depth of the working well 40. In some other embodiments, the width of the ring beams 20 in the same ring beam group (not shown) increases closer to the bottom of the working well 40.

[0039] In one embodiment, the cross-sectional area of ​​the ring frame beam 20 is greater than the cross-sectional area of ​​the cap beam 10.

[0040] Specifically, since the capping beam 10 is located at the upper end of multiple diaphragm walls, it does not need to bear as much pressure. Therefore, the cross-sectional area of ​​the capping beam 10 is smaller than that of the ring frame beam 20. In this embodiment, the height of the capping beam 10 is greater than or equal to 1 meter and less than or equal to 1.3 meters, and the width of the capping beam 10 is greater than or equal to 1.3 meters and less than or equal to 1.7 meters. This design reduces the volume of the capping beam 10, saves on the required cement grout, and reduces production costs. In some other embodiments, the cross-sectional area of ​​a portion of the ring frame beam 20 is equal to that of the capping beam 10.

[0041] In one embodiment, the cross-sectional area of ​​the concrete support 30 located within the cap beam 10 is smaller than the cross-sectional area of ​​the concrete support 30 located within the multi-ring frame beam 20.

[0042] Specifically, in this embodiment, the width of the concrete support 30 cross-section is greater than or equal to 1 meter and less than or equal to 1.2 meters, and the height of the concrete support 30 cross-section is greater than or equal to 1 meter and less than or equal to 1.2 meters. The concrete support 30 located within the capping beam 10 has a cross-sectional width of 1 meter and a height of 1 meter; the concrete support 30 located within the ring beam 20 has a cross-sectional width of 1.2 meters and a height of 1.2 meters. Since the capping beam 10 does not need to bear so much pressure, the concrete support 30 within the capping beam 10 does not need to have such a large volume. This arrangement can save on the cement grout used to make the concrete support 30 within the capping beam 10, thus saving production costs. In some other embodiments, the cross-sectional area of ​​the concrete support 30 located within the capping beam 10 is equal to the cross-sectional area of ​​the concrete support 30 located within the multiple ring beams 20.

[0043] In one embodiment, the cap beam 10 is provided with two parallel concrete supports 30, which extend along the width direction of the working well 40 and are connected to the cap beam 10 at both ends.

[0044] Specifically, two concrete supports 30 are provided at the middle position of the capping beam 10. Since the support performance at the middle position of the capping beam 10 is relatively poor, two concrete supports 30 are placed here. This increases the pressure-bearing capacity of the middle position of the capping beam 10. In some other embodiments, the two concrete supports 30 extend along the length of the working well 40.

[0045] In one embodiment, the end of the concrete support 30 that connects to the cap beam 10 is thickened.

[0046] Specifically, the concrete supports 30 are thickened at each connection point with the capping beam 10 to ensure a better connection between the concrete supports 30 and the capping beam 10. This arrangement increases the installation stability of the concrete supports 30, thereby further enhancing the support performance of the capping beam 10. In other embodiments, the middle portion of the concrete supports 30 is thickened along its length.

[0047] In one embodiment, the ring frame beam 20 is provided with two oppositely arranged concrete supports 30, which extend along the width direction of the working well 40, and both ends of the two concrete supports 30 are connected to the ring frame beam 20.

[0048] Specifically, two concrete supports 30 are provided at the middle position of the ring beam 20. Since the support performance at the middle position of the ring beam 20 is relatively poor, two concrete supports 30 are placed there. This increases the pressure-bearing capacity of the middle position of the ring beam 20. In some other embodiments, the two concrete supports 30 extend along the length of the working well 40.

[0049] In one embodiment, the retaining structure of the working well 40 also includes multiple anchor pipes inserted into the rock strata. The multiple anchor pipes are located on the outer edge of the retaining frame, and a diaphragm wall is connected to the multiple anchor pipes. The multiple anchor pipes are used to fix multiple diaphragm walls.

[0050] Specifically, multiple anchor pipes are installed at the bottom of each diaphragm wall. Each anchor pipe is 6 meters long and has an inclination angle of 15°. The anchor pipes surrounding the outer edge of the retaining frame are spaced 1.5 meters apart. This arrangement further increases the installation stability of the diaphragm walls within the working well 40, thereby enhancing the overall usability of the retaining structure. In other embodiments, the retaining structure of the working well 40 also includes multiple anchor cables inserted into the rock strata. These anchor cables are located at the outer edge of the retaining frame, and each diaphragm wall is connected to multiple anchor cables, which are used to secure multiple diaphragm walls.

[0051] The above description is merely an optional embodiment of the present invention and does not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention's specification and drawings under the inventive concept of the present invention, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present invention.

Claims

1. A working well containment structure disposed within a working well extending toward a subterranean formation, the working well containment structure comprising: The application relates to a working well support structure. The working well support structure comprises: a plurality of diaphragm walls, which are arranged along the depth direction of the working well and are sequentially connected to each other to form a support frame, and the outer wall surface of the support frame is in abutment with the inner wall surface of the working well; a crown beam, which is arranged at the upper end of the support frame and extends along the outer edge of the support frame; a plurality of ring frame beams, which are arranged in the support frame and are located below the crown beam, extend along the inner edge of the support frame, and are sequentially distributed along the depth direction of the working well; and a plurality of concrete supports, which are arranged in each ring frame beam and are spaced apart from each other, and a plurality of concrete supports are arranged in the crown beam and are spaced apart from each other. The diaphragm walls, the crown beam, the ring frame beams and the concrete supports are all made of concrete.

2. A working well containment structure as claimed in claim 1, wherein, In the depth direction of the working well, the cross-sectional area of the lower ring frame beam is greater than that of the upper ring frame beam, the plurality of ring frame beams are divided into a plurality of ring frame beam groups along the depth direction of the working well, the cross-sectional areas of the different ring frame beams in the same ring frame beam group are the same, the cross-sectional area of the ring frame beam of the lower ring frame beam group is greater than that of the ring frame beam of the upper ring frame beam group, the heights of all the ring frame beams are the same, the widths of the ring frame beams in the same ring frame beam group are the same, the width of the ring frame beam of the lower ring frame beam group is greater than that of the ring frame beam of the upper ring frame beam group, and the cross-sectional area of the ring frame beam is greater than that of the crown beam.

3. A working well containment structure as claimed in claim 2, wherein, The cross-sectional area of the concrete support arranged in the crown beam is smaller than that of the concrete support arranged in the plurality of ring frame beams.

4. A working well containment structure as claimed in claim 3, wherein, The crown beam is provided with two concrete supports arranged in parallel, the two concrete supports extend along the width direction of the working well, and the two ends of the two concrete supports are connected with the crown beam.

5. A working well containment structure as claimed in claim 2, wherein, The end of the concrete support connected with the crown beam is thickened.

6. A working well containment structure as claimed in claim 1, wherein, The ring frame beam is provided with two concrete supports arranged oppositely, the two concrete supports extend along the width direction of the working well, and the two ends of the two concrete supports are connected with the ring frame beam. The working well support structure further comprises a plurality of anchor pipes inserted into the rock stratum, the plurality of anchor pipes are arranged at the outer edge of the support frame, one diaphragm wall is connected with the plurality of anchor pipes, and the plurality of anchor pipes are used for fixing the plurality of diaphragm walls.

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