Improved structure for preventing settlement of inspection well in collapsible loess region

Abstract

The utility model discloses a collapsible loess area inspection well anti -settlement improvement structure belongs to inspection well technical field, including inspection well body, and inspection well body is by a plurality of inspection well unit assembly, and inspection well unit includes annular well shaft and fixing piece, and fixing piece along the outer ring surface of annular well shaft is evenly arranged with multiple, and fixing piece includes vertical connection's support plate and fixed web, and support plate is used for increasing the contact area of inspection well unit and surrounding soil body, and support plate is equipped with through -hole, and the support plate of each layer inspection well unit is aligned along the axial, and the through -hole of alignment is equipped with screw rod, and the bottom of screw rod is equipped with fender, and fender is located with the support plate of bottom layer and is abutted, and screw rod is equipped with with its thread connection's lock nut, and lock nut is used for the close -up support plate to fixed each layer inspection well unit. Each layer inspection well unit can cooperate with the stress, can pass through the force transmission dispersion stress of structure self, reduces the local damage of the stress concentration.

Description

Technical Field

[0001] This utility model belongs to the field of inspection well technology, and specifically relates to an improved structure for preventing settlement of inspection wells in collapsible loess areas. Background Technology

[0002] In municipal engineering, inspection wells, as an important component of underground pipeline systems, undertake key functions such as inspection, maintenance, and ventilation. However, in collapsible loess areas, due to the characteristics of loess that collapses when wet and has unstable bearing capacity, the settlement problem of inspection wells has long been a challenge in engineering practice.

[0003] In existing technologies, traditional inspection wells mostly adopt brick masonry or monolithic cast-in-place structures. There is a lack of effective cooperative stress structure between the inspection well and the surrounding soil. The relative displacement between the inspection well and the well cylinder is easily caused by soil deformation, resulting in well sinking and height difference at the junction of the well cover and the road surface.

[0004] To address the aforementioned issues, a Chinese utility model patent (CN222908887U) describes an anti-settlement structure for prefabricated manholes. This patent employs a prefabricated manhole base structure with anchor plates installed around the base and secured by locking components. The anchor plates increase the contact area between the manhole base and the surrounding soil. The device in this patent features high stability, ease of installation and disassembly, and strong anti-settlement capability.

[0005] In the aforementioned prior art, although the anchor plate can increase the contact area with the surrounding soil, the lack of a connecting structure between the manhole bases means that when local settlement occurs in the soil, the stress cannot be adjusted and dispersed by the structure itself, which can easily lead to local damage to the manhole. Utility Model Content

[0006] The purpose of this utility model is to provide an improved structure for preventing settlement of inspection wells in collapsible loess areas, aiming to solve the problems existing in the prior art mentioned above.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0008] An improved structure for preventing settlement of manholes in collapsible loess areas includes a manhole body, which is assembled from multiple manhole units. Each manhole unit includes an annular shaft and fixing components. Multiple fixing components are evenly distributed circumferentially along the outer ring surface of the annular shaft. Each fixing component includes a vertically connected support plate and a fixing rib. The support plate is used to increase the contact area between the manhole unit and the surrounding soil. The support plate has through holes. The support plates of each layer of manhole units are aligned axially, and threaded rods pass through the aligned through holes. The bottom of the threaded rod has a stop block that abuts against the support plate at the bottom layer. The threaded rod has a lock nut that is threadedly connected to it. The lock nut is used to tighten the support plate to fix each layer of manhole units.

[0009] Furthermore, the outer ring surface of the annular well shaft is provided with a plug-in groove between adjacent fixing members, and the plug-in groove is provided with an auxiliary fixing member that can be detachably connected to it. The auxiliary fixing member is used to increase the contact area between the inspection well unit and the surrounding soil.

[0010] Furthermore, the insertion slot includes a base plate and C-shaped limiting plates symmetrically arranged on both sides of the center line of the base plate. The C-shaped limiting plates are perpendicularly connected to the base plate. The auxiliary fixing component includes a connected auxiliary support plate and an insertion plate. The insertion plate is used to insert into the insertion slot. The C-shaped limiting plate is provided with a first threaded hole, and the insertion plate is provided with a corresponding second threaded hole. The aligned first threaded hole and second threaded hole are fixed by bolts.

[0011] Furthermore, the top of the annular wellbore is provided with an annular plate, and the bottom of the annular wellbore is provided with an annular groove, and the annular plates and annular grooves of the upper and lower adjacent annular wellbores are inserted and matched.

[0012] Furthermore, the top of the annular well shaft is provided with a positioning protrusion, and the bottom of the shaft is provided with a corresponding positioning groove. The positioning protrusions of the upper and lower adjacent annular well shafts are in concave-convex fit with the positioning grooves.

[0013] Furthermore, the fixing rib is located at the center line of the support plate, and two through holes are provided, which are symmetrically arranged on both sides of the fixing rib.

[0014] Compared with the shortcomings and deficiencies of the prior art, the present invention has the following beneficial effects.

[0015] In this invention, the foundation area between the inspection well unit and the surrounding soil is increased by the support plate, and the annular well cylinder and the fixing parts are integrated to improve the overall load-bearing efficiency of the structure. The inspection well units of each layer are fastened together by screws and anti-loosening nuts, so that the inspection well units of each layer can share the force together. When local soil settlement occurs, the stress can be dispersed by the force transmission of the structure itself, reducing local damage caused by stress concentration, thereby improving the stability and service life of the inspection well in collapsible loess areas.

[0016] The inspection well unit is equipped with detachable auxiliary fasteners. By flexibly adding these auxiliary fasteners, the contact area between the inspection well body and the surrounding soil can be further increased, making the soil's restraining force on the inspection well body more evenly distributed, thereby strengthening the structure's anti-settlement capability. The number of auxiliary fasteners can be flexibly adjusted according to actual geological conditions. In areas with a high risk of settlement, the number of installations can be increased to enhance the fixing effect, while in areas with relatively stable geological conditions, the number can be reduced, configuring them as needed to balance anti-settlement performance and economy. Attached Figure Description

[0017] Figure 1 This is a three-dimensional structural schematic diagram of Example 1.

[0018] Figure 2 This is a cross-sectional structural diagram of the inspection well unit in Example 1.

[0019] Figure 3 This is a three-dimensional structural diagram of the inspection well unit in Example 2.

[0020] Figure 4 This is a schematic diagram of the auxiliary fastener in Example 2.

[0021] Figure 5 This is a three-dimensional structural diagram of the auxiliary fixing component for installing the inspection well body in Example 2.

[0022] Figure 6 This is a schematic diagram of the structure of the manhole body, manhole cover, and soil.

[0023] In the diagram: 100, manhole body; 110, manhole unit; 120, annular shaft; 121, annular plate; 122, annular groove; 123, positioning protrusion; 124, positioning groove; 130, fastener; 131, support plate; 132, fixing rib; 140, screw; 141, stop block; 142, anti-loosening nut; 150, insertion groove; 151, base plate; 152, C-shaped plate; 153, first threaded hole; 160, auxiliary fastener; 161, auxiliary support plate; 162, insertion plate; 163, second threaded hole. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model 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 of the present utility model and are not intended to limit the present utility model.

[0025] Example 1

[0026] Reference Figure 1 and Figure 6This embodiment discloses an improved structure for preventing settlement of inspection wells in collapsible loess areas, including an inspection well body 100, with an anti-settlement well cover installed on the top of the inspection well body 100. The anti-settlement well cover is existing technology and can be selected from commercially available products.

[0027] The inspection well body 100 is composed of multiple inspection well units 110 coaxially spliced ​​together vertically. (Refer to...) Figure 2 The inspection well unit 110 includes an annular well cylinder 120, with an inspection well channel formed inside the annular well cylinder 120. Multiple fixing members 130 are evenly distributed circumferentially around the outer ring surface of the annular well cylinder 120 along its axis. The fixing members 130 are used to ensure close contact with the surrounding soil, reducing the risk of settlement of the inspection well body 100. In this embodiment, there are four fixing members 130, evenly distributed at 90° circumference along the annular well cylinder 120. Finite element analysis shows that the soil constraint force deviation can be controlled within 5%.

[0028] The fixing component 130 includes a support plate 131 and a fixing rib 132. The support plate 131 is parallel to the upper and lower end faces of the annular well shaft 120 and is fixedly connected to the outer annular surface of the annular well shaft 120 by welding. The fixing rib 132 is arranged along the axial direction of the annular well shaft 120, with one side of the fixing rib 132 fixedly connected to the outer annular surface of the annular well shaft 120 and the bottom perpendicularly connected to the support plate 131. The support plate 131 and the fixing rib 132 cooperate to increase the contact area between the inspection well unit 110 and the surrounding soil.

[0029] The support plate 131 has a through hole 133 extending vertically. The support plates 131 of each layer of inspection well unit 110 are aligned axially to align the through holes 133. A screw 140 passes through the through hole 133, and a stop block 141 is fixedly connected to the bottom of the screw 140. The stop block 141 abuts against the support plate 131 of the bottom inspection well unit 110. A lock nut 142, threadedly connected to the screw 140, abuts against the support plate 131 to fix the inspection well unit 110, ensuring tight contact between the inspection well unit 110 and the inspection well unit 110 below it. The screw 140 can be made of Q235 steel with a diameter of 14-18mm, which can be determined based on the well depth and soil load calculations. Each layer of inspection well unit 110 is provided with a corresponding lock nut 142, which limits and fixes each layer of inspection well unit 110. The screw 140, the anti-loosening nut 142 and the support plate 131 are used to connect the inspection well units 110 of each layer into a whole.

[0030] In this embodiment, the fixing rib plate 132 is located at the center line of the support plate 131, and two through holes 133 are symmetrically arranged on the support plate 131 on both sides of the fixing rib plate 132.

[0031] Reference Figure 2An annular plate 121 is provided on the top of the annular well shaft 120 near the inner ring side, and correspondingly, an annular groove 122 is provided on the bottom of the annular well shaft 120 near the inner ring side. When the upper and lower adjacent annular well shafts 120 are assembled, the annular plate 121 on the top surface of the lower annular well shaft 120 is inserted into the annular groove 122 at the bottom of the upper annular well shaft 120, so that the upper and lower inspection well units 110 are tightly connected.

[0032] The top surface of the annular well shaft 120, located outside the annular plate 121, is provided with positioning protrusions 123. At least two positioning protrusions 123 are arranged opposite each other. Correspondingly, the bottom surface of the annular well shaft 120 is provided with positioning grooves 124. The positioning grooves 124 and the positioning protrusions 123 are aligned vertically along the axial direction. When assembling adjacent annular well shafts 120, the aligned positioning protrusions 123 can be inserted into the positioning grooves 124 to achieve rapid positioning and installation of adjacent inspection well units 110, which helps to ensure the accurate alignment of the through holes 133 on the upper and lower support plates 131.

[0033] The above settings can achieve the following:

[0034] The fixing component 130 is composed of a support plate 131 and a fixing rib plate 132 connected vertically. The support plate 131 is used to increase the contact area between the inspection well unit 110 and the surrounding soil. The fixing component 130 is integrated with the annular well cylinder 120 to improve the overall load-bearing efficiency of the inspection well unit 110.

[0035] The support plates 131 of each layer of inspection well unit 110 are aligned along the axial direction. The screws 140 pass through the aligned through holes 133, and together with the bottom stop 141 and the anti-loosening nuts 142 of each layer, the inspection well units 110 of each layer are connected into a rigid whole. This helps the upper and lower layers of inspection well units 110 to share the force together, and makes the constraint force of the soil on the inspection well body 100 more uniform.

[0036] The annular plate 121 at the top of the lower annular well casing 120 is inserted into the annular groove 122 at the bottom of the upper inspection well unit 110, which helps to enhance the sealing and connection stability between the inspection well units 110. The convex-concave fit between the positioning protrusion 123 and the positioning groove 124 ensures the rapid and accurate alignment of the upper and lower inspection well units 110.

[0037] Example 2

[0038] Example 2 is a further improvement on Example 1.

[0039] Reference Figure 5 This embodiment discloses an improved structure for preventing settlement of inspection wells in collapsible loess areas. Compared with embodiment 1, it adds detachable auxiliary fixing parts 160, which makes it easier to select and install a certain number of auxiliary fixing parts 160 according to the actual soil conditions, improve the stability of the connection between the inspection well body 100 and the surrounding soil, and at the same time help control costs and improve economy.

[0040] Reference Figure 3 The annular well shaft 120 has a insertion groove 150 on its outer ring surface. The insertion groove 150 is located in the middle between adjacent fasteners 130. The insertion groove 150 includes a base plate 151. C-shaped plates 152 are symmetrically arranged on both sides of the top surface of the base plate 151 along the center line of the base plate 151. The bottom of the C-shaped plates 152 is perpendicularly connected to the base plate 151. The C-shaped plates 152 have two parallel side plates. The side plates of the C-shaped plates 152 are adapted to the shape of the outer ring surface of the annular well shaft 120. One side plate of the C-shaped plates 152 is fixedly connected to the annular well shaft 120, and the other side plate is provided with a first threaded hole 153. The grooves of the two C-shaped plates 152 are opposite to each other and are spaced a certain distance apart.

[0041] Reference Figure 4 The auxiliary fixing component 160 includes an auxiliary support plate 161 and a plug-in plate 162. The auxiliary support plate 161 is parallel to the upper or lower end face of the annular well shaft 120. The plug-in plate 162 is fixed to one side of the auxiliary support plate 161 and is plugged into the plug-in groove 150. The plug-in plate 162 has corresponding second threaded holes 163 on both sides. The first threaded hole 153 and the second threaded hole 163 are fixed by bolts, thereby fixing the auxiliary fixing component 160 to the plug-in groove 150.

[0042] The above settings can achieve the following:

[0043] The insertion groove 150 on the outer ring surface of the annular well casing 120 can be used to install auxiliary fixing components 160 as needed. The auxiliary support plate 161 of the auxiliary fixing component 160 further expands the contact area between the inspection well unit 110 and the surrounding soil (see reference). Figure 6 This makes the soil constraint force distribution more uniform and reduces the risk of local settlement.

[0044] The auxiliary fixing component 160 is engaged with the insertion slot 150 via the insertion plate 162 and further secured by bolts. The number of auxiliary fixing components 160 can be flexibly adjusted according to actual geological conditions, such as the degree of loess collapsibility. More installations can be added in areas with high settlement risk to strengthen the fixation, while fewer installations can be added in geologically stable areas to balance costs.

[0045] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An improved structure for preventing settlement of inspection wells in collapsible loess areas, comprising an inspection well body (100), wherein the inspection well body (100) is assembled from multiple inspection well units (110), characterized in that, The inspection well unit (110) includes an annular well shaft (120) and fixing members (130). Multiple fixing members (130) are evenly distributed around the outer ring surface of the annular well shaft (120). Each fixing member (130) includes a vertically connected support plate (131) and a fixing rib plate (132). The support plate (131) is used to increase the contact area between the inspection well unit (110) and the surrounding soil. The support plate (131) is provided with through holes. The support plates (131) of each layer of inspection well units (110) are aligned axially. The aligned through holes are fitted with screws (140). The bottom of the screw (140) is provided with a stop block (141). The stop block (141) abuts against the support plate (131) located at the bottom layer. The screw (140) is provided with a lock nut (142) that is threadedly connected to it. The lock nut (142) is used to press the support plate (131) to fix each layer of inspection well units (110).

2. The improved structure for preventing settlement of inspection wells as described in claim 1, characterized in that, The outer ring surface of the annular well shaft (120) is provided with a plug groove (150) between adjacent fixing members (130). The plug groove (150) is provided with an auxiliary fixing member (160) that is detachably connected to it. The auxiliary fixing member (160) is used to increase the contact area between the inspection well unit (110) and the surrounding soil.

3. The improved structure for preventing settlement of inspection wells as described in claim 2, characterized in that, The insertion slot (150) includes a base plate (151) and C-shaped plates (152) symmetrically arranged on both sides of the center line of the base plate (151). The C-shaped plates (152) are vertically connected to the base plate (151). The auxiliary fixing component (160) includes a connected auxiliary support plate (161) and an insertion plate (162). The insertion plate (162) is used to insert into the insertion slot (150). The C-shaped plate (152) is provided with a first threaded hole (153). The insertion plate (162) is provided with a corresponding second threaded hole (163). The aligned first threaded hole (153) and second threaded hole (163) are fixed by bolts.

4. The improved structure for preventing settlement of inspection wells as described in claim 1, characterized in that, The top of the annular well shaft (120) is provided with an annular plate (121), and the bottom of the annular well shaft (120) is provided with an annular groove (122). The annular plates (121) and annular grooves (122) of the upper and lower adjacent annular well shafts (120) are inserted and matched.

5. The improved structure for preventing settlement of inspection wells as described in claim 4, characterized in that, The top of the annular well shaft (120) is provided with a positioning protrusion (123), and the bottom of the annular well shaft (120) is provided with a corresponding positioning groove (124). The positioning protrusion (123) and the positioning groove (124) of the adjacent annular well shafts (120) are in concave-convex fit.

6. The improved structure for preventing settlement of inspection wells as described in claim 1, characterized in that, The fixing rib (132) is located at the center line of the support plate (131), and there are two through holes, which are symmetrically arranged on both sides of the fixing rib (132).

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