Substrate mounting structure of drainage inspection well under soft foundation

Abstract

The utility model provides a soft foundation lower drainage inspection well base installation structure which comprises an inspection well, an anti-sedimentation assembly is arranged outside the inspection well, and the anti-sedimentation assembly at least comprises a base layer arranged at the bottom of the inspection well. The anti-sedimentation assembly is arranged outside the inspection well, and the anti-sedimentation assembly at least comprises the base layer arranged at the bottom of the inspection well, so that the function of reinforcing the bottom foundation of the inspection well is achieved, the area of the anti-sedimentation assembly under the action of soil supporting force is increased, and the problems of complex structure, poor anti-sedimentation effect and the like are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of underground infrastructure, in particular to an installation structure for the base of a drainage inspection well under a soft foundation. Background Art

[0002] An inspection well is a well-shaped structure made of plastic by one-piece injection molding or bricklaying for facilitating regular inspection, cleaning, dredging or down-well operation inspection, and is an essential component for ensuring the normal operation of urban pipelines. In most cases, municipal drainage pipelines need to be arranged on the sidewalks, non-motor vehicle lanes, and even motor vehicle lanes of roads. If the drainage inspection wells on these pipelines are not reasonably designed, especially the bottom foundation treatment is not in place, it is extremely easy to cause the settlement of the road surface, which will bring certain safety hazards and seriously affect the overall trafficability of the road.

[0003] Chinese Patent CN104775501B discloses an anti-settlement plastic drainage inspection well and its construction method, which includes a drainage inspection well main body. A plurality of installation holes are arranged on the side wall of the drainage inspection well main body. One end of an anchor rod penetrates through the installation hole and is arranged in the foundation, and the other end is pressed by a bearing gasket and fixed by a fastening nut. A sealing ring is arranged between the bearing gasket and the side wall of the drainage inspection well main body. During construction, first place the drainage inspection well at the predetermined position dug, then backfill the surrounding of the drainage inspection well, install the anchor rods from the inside to the outside of the drainage inspection well, grout around the drainage inspection well through the anchor rods, and then install the sealing ring and bearing gasket in sequence and fix them with fastening nuts. In the present invention, an anchor rod for fixing is arranged at the interface between the drainage inspection well and the pipeline, which avoids the damage caused by stress concentration at the interface. The drainage inspection well, the anchor rod and the surrounding soil form a unified flexible structure, which can cooperate to prevent settlement, reduce the influence on the road surface structure and is applicable to various foundations.

[0004] However, the following problems exist in this technical solution. The structure for adding anchor rods to fix the drainage inspection well is relatively complex, the construction difficulty and cost are high, and the projected area of the anchor rod plus grouting on the horizontal plane is small, that is, the area subjected to the soil supporting force is small, and the effect of preventing settlement is limited. Content of the Utility Model

[0005] The purpose of the utility model is to provide an installation structure for the base of a drainage inspection well under a soft foundation in view of the deficiencies of the prior art. By setting an anti-settlement component outside the inspection well, and the anti-settlement component at least includes a base layer arranged at the bottom of the inspection well, the function of strengthening the bottom foundation of the inspection well is realized, the area of the anti-settlement component subjected to the soil supporting force is increased, and problems such as complex structure and poor anti-settlement effect are solved.

[0006] To achieve the above purpose, the utility model provides the following technical solutions:

[0007] A base installation structure of a drainage inspection well under a soft foundation, comprising an inspection well, wherein an anti-settlement component is arranged outside the inspection well, and the anti-settlement component at least comprises a base layer arranged at the bottom of the inspection well.

[0008] As an optimization, the base layer is a grouting layer, and a plurality of bottom grouting holes are arranged at the bottom of the inspection well.

[0009] As an optimization, the bottom of the inspection well is expanded outwards, and the anti-settlement component further comprises a first cushion layer and a second cushion layer clamped between the bottom of the inspection well and the base layer.

[0010] As an optimization, an isolation component is further included and is arranged at intervals around the inspection well. The isolation component comprises:

[0011] Support piles, longitudinally arranged around the inspection well, and a plurality of the support piles are sequentially connected to form a closed figure;

[0012] A collar, horizontally arranged on the upper part of the support piles, and at least one layer of the collar is arranged.

[0013] As an optimization, the lower end of the support pile is 0.5 - 2 meters deeper than the second cushion layer, and a reinforcement layer is filled between it and the inspection well. The reinforcement layer is also a grouting layer.

[0014] As an optimization, a plurality of side grouting holes are arranged between the inspection well and the isolation component, and the lower ends of the bottom grouting holes and the side grouting holes are located in the same plane.

[0015] As an optimization, the construction methods of the base layer and the reinforcement layer are preferably one or more of replacing with rubble, compaction grouting, cement mixing piles, and high-pressure jet grouting piles.

[0016] As an optimization, a plurality of bottom reinforcement columns are arranged on the base layer, and a plurality of side reinforcement columns longitudinally arranged on the outer side of the inspection well and having the same plane as the lower ends of the bottom reinforcement columns.

[0017] As an optimization, a water inlet pipe and a water outlet pipe are horizontally connected to the inspection well, and the side reinforcement columns are at least arranged at the water inlet pipe and the water outlet pipe.

[0018] As an optimization, the bottom reinforcement columns and the side reinforcement columns are water stop curtains, and their construction methods are preferably one or more of socketed high-pressure jet grouting piles and injecting soil solidifying agents.

[0019] The beneficial effects of the present utility model are as follows:

[0020] (1) The utility model strengthens the function of the foundation at the bottom of the inspection well by setting a settlement prevention component outside the inspection well, and the settlement prevention component at least includes a base layer arranged at the bottom of the inspection well, increasing the area of the settlement prevention component subjected to the soil supporting force.

[0021] (2) The utility model provides a more solid support for the inspection well by setting a plain concrete cushion layer and a thick gravel cushion layer at the bottom of the inspection well. Among them, the plain concrete cushion layer has high strength and can directly bear the weight of the inspection well, while the thick gravel cushion layer has good drainage and compaction performance, which can further improve the bearing capacity of the bottom of the well.

[0022] (3) The utility model longitudinally arranges support piles around the inspection well, which acts together with the collar to form a stable support structure, preventing the inspection well from deforming and displacing in soft ground. Especially during the excavation and backfilling processes, it provides important support and stability.

[0023] (4) Through the arrangement of the bottom grouting holes and side grouting holes in the utility model, the grouting material can be evenly distributed in the area to be reinforced through these holes, making the grouting process more accurate and efficient, and the reinforcement layer and the base layer cooperate to further improve the reinforcement effect.

[0024] (5) By setting bottom reinforcement columns and side reinforcement columns in the utility model, especially at the water inlet pipe and outlet pipe, it provides additional support and fixation for the inspection well, enhancing the stability of the inspection well at key positions and reducing deformation and displacement caused by external forces.

[0025] In summary, the utility model designs the installation structure of the drainage inspection well for soil such as silty clay, silty clay with silt, sandy soil, and silty soil respectively, significantly improving the stability and bearing capacity of the inspection well under soft ground, reducing the settlement risk, effectively reducing the seepage risk, and extending the service life of the inspection well, etc. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic cross-sectional structure diagram of the first embodiment of the utility model;

[0027] Figure 2 It is a schematic top view structure diagram of the first embodiment of the utility model;

[0028] Figure 3 It is a schematic cross-sectional structure diagram of the second embodiment of the utility model;

[0029] Figure 4 It is a schematic top view structure diagram of the second embodiment of the utility model. DETAILED DESCRIPTION OF THE INVENTION

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation to the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "a plurality" means two or more unless otherwise specifically defined.

[0032] Embodiment 1

[0033] As Figure 1 、 2 shown, this embodiment provides an installation structure for the base of a drainage inspection well under a soft foundation, including an inspection well 1, and an anti-settlement component 2 is arranged outside the inspection well 1. The anti-settlement component 2 at least includes a base layer 21 arranged at the bottom of the inspection well 1.

[0034] By arranging the anti-settlement component 2 outside the inspection well 1, and the anti-settlement component 2 at least includes the base layer 21 arranged at the bottom of the inspection well 1, the function of strengthening the bottom foundation of the inspection well 1 is realized, and the area of the anti-settlement component 2 subjected to the soil supporting force is increased.

[0035] As Figure 1 shown, the base layer 21 is a grouting layer, and a plurality of bottom grouting holes 22 are arranged at the bottom of the inspection well 1. It should be noted that this embodiment is mainly used to prevent the settlement of the inspection well 1 in soil such as silty clay and silty clay with silt. The purpose is to ensure that the bottom of the inspection well 4 has sufficient bearing capacity. In this embodiment, the bearing capacity pressure ≥ 120 kPa.

[0036] As Figure 1As shown, the bottom of the inspection well 1 is expanded outward. The anti-settlement component 2 further includes a first cushion layer 23 and a second cushion layer 24 clamped between the bottom of the inspection well 1 and the base layer 21. The first cushion layer 23 is a plain concrete cushion layer, and the second cushion layer 24 is a thick gravel cushion layer.

[0037] By setting a plain concrete cushion layer and a thick gravel cushion layer at the bottom of the inspection well 1, a more solid support is provided for the inspection well 1. Among them, the plain concrete cushion layer has high strength and can directly bear the weight of the inspection well 1, while the thick gravel cushion layer has good drainage and compaction performance, which can further improve the bearing capacity of the bottom of the well.

[0038] As Figure 1 、 2 shown, it further includes an isolation component 3 arranged at intervals around the inspection well 1. The isolation component 3 includes: a support pile 31 longitudinally arranged around the inspection well 1, and a number of the support piles 31 are sequentially connected to form a closed figure; a waling 32 horizontally arranged on the upper part of the support pile 31, and at least one layer of the waling 32 is provided. The support pile 31 is a V-shaped steel sheet pile, and the waling 32 is a section steel.

[0039] By arranging the support pile 31 longitudinally around the inspection well 1 and acting together with the waling 32, a stable support structure is formed to prevent the inspection well from deforming and displacing in soft soil foundations. Especially during the excavation and backfilling processes, it provides important support and stability.

[0040] As Figure 1 、 2 shown, the lower end of the support pile 31 is 0.5 - 2 meters deeper than the second cushion layer 24, and a reinforcement layer 25, which is also a grouting layer, is filled between it and the inspection well 1. A number of side grouting holes 26 are arranged between the inspection well 1 and the isolation component 3, and the lower ends of the bottom grouting hole 22 and the side grouting holes 26 are located in the same plane.

[0041] Through the arrangement of the bottom grouting hole 22 and the side grouting holes 26, the grouting material can be evenly distributed in the area to be reinforced through these holes, making the grouting process more accurate and efficient, and the reinforcement layer 25 and the base layer 21 cooperate to further improve the reinforcement effect.

[0042] The construction methods of the base layer 21 and the reinforcement layer 25 are preferably one or more of replacing with block stones, compaction grouting, cement mixing piles, and high-pressure jet grouting piles, which can quickly and effectively improve the bearing capacity of the foundation at the bottom of the well, and thus ensure the construction quality of the inspection well 1.

[0043] Embodiment 2

[0044] As Figure 3 、 4As shown in the figure, components that are the same as or corresponding to those in the first embodiment are labeled with corresponding reference numerals in the first embodiment. For simplicity, only the differences from the first embodiment will be described below. The difference between the second embodiment and the first embodiment lies in that: a plurality of bottom well reinforcement columns 41 are provided on the base layer 21, and a plurality of side reinforcement columns 42 are longitudinally arranged outside the inspection well 1, with the lower ends of the side reinforcement columns 42 being in the same plane as the bottom well reinforcement columns 41. The inspection well 1 is horizontally connected to a water inlet pipe 11 and a water outlet pipe 12, and the side reinforcement columns 42 are provided at least at the water inlet pipe 11 and the water outlet pipe 12. It should be noted that this embodiment is mainly aimed at drainage inspection wells 1 in soil such as sandy soil and silty soil. Therefore, in order to take good precipitation measures for the bottom foundation, the method of setting bottom well reinforcement columns 41 is used for soil reinforcement and water stop, which can effectively reduce diseases such as quicksand, and thus ensure the overall quality of the inspection well 1.

[0045] By setting the bottom well reinforcement columns 41 and the side reinforcement columns 42, especially at the water inlet pipe and the water outlet pipe, additional support and fixation are provided for the inspection well, which can enhance the stability of the inspection well 1 at key positions and reduce deformation and displacement caused by external forces.

[0046] The bottom well reinforcement columns 41 and the side reinforcement columns 42 are water stop curtains, and their construction methods are preferably one or more of socketed high-pressure jet grouting piles and injecting soil solidifying agents, which can effectively reduce the penetration and erosion of groundwater to the inspection well, protect the structural safety of the inspection well 1, and reduce problems such as foundation softening caused by water seepage.

[0047] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A drainage inspection well base installation structure under a soft foundation, comprising an inspection well, characterized in that: An anti-settling component is arranged outside the inspection well, and the anti-settling component at least comprises a base layer arranged at the bottom of the inspection well; The base layer is a grouting layer, and a plurality of well bottom grouting holes are arranged at the bottom of the inspection well.

2. The base installation structure of a drainage inspection well under a soft foundation according to claim 1 is characterized in that: The bottom of the inspection well is arranged to expand outwards, and the anti-settling component also includes a first cushion layer and a second cushion layer sandwiched between the bottom of the inspection well and the base layer.

3. The base installation structure of a drainage inspection well under a soft foundation according to claim 2 is characterized in that: It also includes an isolation assembly spaced around the inspection well, the isolation assembly comprising: Support piles are longitudinally arranged around the inspection well, and a plurality of the support piles are sequentially connected to form a closed figure; The surrounding purlin is transversely arranged on the upper part of the supporting pile, and the surrounding purlin is provided with at least one layer.

4. The base installation structure of a drainage inspection well under a soft foundation according to claim 3 is characterized in that: The lower end of the support pile is 0.5-2 meters deeper than the second cushion layer, and a reinforcement layer is filled between the support pile and the inspection well, and the reinforcement layer is also a grouting layer.

5. The base installation structure of a drainage inspection well under a soft foundation according to claim 4 is characterized in that: A plurality of side grouting holes are arranged between the inspection well and the isolation assembly, and the bottom grouting holes and the lower ends of the side grouting holes are located in the same plane.

6. The base installation structure of a drainage inspection well under a soft foundation according to claim 4 is characterized in that: The construction method of the base layer and the reinforcement layer is preferably one or more of replacement of block stones, compaction grouting, cement mixing piles, and high-pressure rotary jet piles.

7. The base installation structure of a drainage inspection well under a soft foundation according to claim 1 is characterized in that: The base layer is provided with a plurality of well bottom reinforcement columns, and the outer side of the inspection well is longitudinally provided with a plurality of side reinforcement columns whose lower ends are located in the same plane as the well bottom reinforcement columns.

8. The base installation structure of a drainage inspection well under a soft foundation according to claim 7 is characterized in that: The inspection well is horizontally connected with a water inlet pipe and a water outlet pipe, and the side reinforcement column is at least arranged at the water inlet pipe and the water outlet pipe.

9. The base installation structure of a drainage inspection well under a soft foundation according to claim 7 is characterized in that: The bottom reinforcement columns and side reinforcement columns are water-stop curtains, and their construction method is preferably one or more of high-pressure rotary jetting piles and injection of soil solidifying agents.

Images